Merge pull request #1961 from qlyoung/docuser

[mirror_frr.git] / bgpd / bgp_route.c

/* BGP routing information
 * Copyright (C) 1996, 97, 98, 99 Kunihiro Ishiguro
 * Copyright (C) 2016 Job Snijders <job@instituut.net>
 *
 * This file is part of GNU Zebra.
 *
 * GNU Zebra is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License as published by the
 * Free Software Foundation; either version 2, or (at your option) any
 * later version.
 *
 * GNU Zebra is distributed in the hope that it will be useful, but
 * WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License along
 * with this program; see the file COPYING; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
 */

#include <zebra.h>
#include <math.h>

#include "prefix.h"
#include "linklist.h"
#include "memory.h"
#include "command.h"
#include "stream.h"
#include "filter.h"
#include "log.h"
#include "routemap.h"
#include "buffer.h"
#include "sockunion.h"
#include "plist.h"
#include "thread.h"
#include "workqueue.h"
#include "queue.h"
#include "memory.h"
#include "lib/json.h"

#include "bgpd/bgpd.h"
#include "bgpd/bgp_table.h"
#include "bgpd/bgp_route.h"
#include "bgpd/bgp_attr.h"
#include "bgpd/bgp_debug.h"
#include "bgpd/bgp_aspath.h"
#include "bgpd/bgp_regex.h"
#include "bgpd/bgp_community.h"
#include "bgpd/bgp_ecommunity.h"
#include "bgpd/bgp_lcommunity.h"
#include "bgpd/bgp_clist.h"
#include "bgpd/bgp_packet.h"
#include "bgpd/bgp_filter.h"
#include "bgpd/bgp_fsm.h"
#include "bgpd/bgp_mplsvpn.h"
#include "bgpd/bgp_nexthop.h"
#include "bgpd/bgp_damp.h"
#include "bgpd/bgp_advertise.h"
#include "bgpd/bgp_zebra.h"
#include "bgpd/bgp_vty.h"
#include "bgpd/bgp_mpath.h"
#include "bgpd/bgp_nht.h"
#include "bgpd/bgp_updgrp.h"
#include "bgpd/bgp_label.h"

#if ENABLE_BGP_VNC
#include "bgpd/rfapi/rfapi_backend.h"
#include "bgpd/rfapi/vnc_import_bgp.h"
#include "bgpd/rfapi/vnc_export_bgp.h"
#endif
#include "bgpd/bgp_encap_types.h"
#include "bgpd/bgp_encap_tlv.h"
#include "bgpd/bgp_evpn.h"
#include "bgpd/bgp_evpn_vty.h"

#ifndef VTYSH_EXTRACT_PL
#include "bgpd/bgp_route_clippy.c"
#endif

/* Extern from bgp_dump.c */
extern const char *bgp_origin_str[];
extern const char *bgp_origin_long_str[];

/* PMSI strings. */
#define PMSI_TNLTYPE_STR_NO_INFO "No info"
#define PMSI_TNLTYPE_STR_DEFAULT PMSI_TNLTYPE_STR_NO_INFO
static const struct message bgp_pmsi_tnltype_str[] = {
        {PMSI_TNLTYPE_NO_INFO, PMSI_TNLTYPE_STR_NO_INFO},
        {PMSI_TNLTYPE_RSVP_TE_P2MP, "RSVP-TE P2MP"},
        {PMSI_TNLTYPE_MLDP_P2MP, "mLDP P2MP"},
        {PMSI_TNLTYPE_PIM_SSM, "PIM-SSM"},
        {PMSI_TNLTYPE_PIM_SM, "PIM-SM"},
        {PMSI_TNLTYPE_PIM_BIDIR, "PIM-BIDIR"},
        {PMSI_TNLTYPE_INGR_REPL, "Ingress Replication"},
        {PMSI_TNLTYPE_MLDP_MP2MP, "mLDP MP2MP"},
        {0}
};

struct bgp_node *bgp_afi_node_get(struct bgp_table *table, afi_t afi,
                                  safi_t safi, struct prefix *p,
                                  struct prefix_rd *prd)
{
        struct bgp_node *rn;
        struct bgp_node *prn = NULL;

        assert(table);
        if (!table)
                return NULL;

        if ((safi == SAFI_MPLS_VPN) || (safi == SAFI_ENCAP)
            || (safi == SAFI_EVPN)) {
                prn = bgp_node_get(table, (struct prefix *)prd);

                if (prn->info == NULL)
                        prn->info = bgp_table_init(afi, safi);
                else
                        bgp_unlock_node(prn);
                table = prn->info;
        }

        rn = bgp_node_get(table, p);

        if ((safi == SAFI_MPLS_VPN) || (safi == SAFI_ENCAP)
            || (safi == SAFI_EVPN))
                rn->prn = prn;

        return rn;
}

struct bgp_node *bgp_afi_node_lookup(struct bgp_table *table, afi_t afi,
                                     safi_t safi, struct prefix *p,
                                     struct prefix_rd *prd)
{
        struct bgp_node *rn;
        struct bgp_node *prn = NULL;

        if (!table)
                return NULL;

        if ((safi == SAFI_MPLS_VPN) || (safi == SAFI_ENCAP)
            || (safi == SAFI_EVPN)) {
                prn = bgp_node_lookup(table, (struct prefix *)prd);
                if (!prn)
                        return NULL;

                if (prn->info == NULL) {
                        bgp_unlock_node(prn);
                        return NULL;
                }

                table = prn->info;
        }

        rn = bgp_node_lookup(table, p);

        return rn;
}

/* Allocate bgp_info_extra */
static struct bgp_info_extra *bgp_info_extra_new(void)
{
        struct bgp_info_extra *new;
        new = XCALLOC(MTYPE_BGP_ROUTE_EXTRA, sizeof(struct bgp_info_extra));
        new->label[0] = MPLS_INVALID_LABEL;
        new->num_labels = 0;
        return new;
}

static void bgp_info_extra_free(struct bgp_info_extra **extra)
{
        if (extra && *extra) {
                if ((*extra)->damp_info)
                        bgp_damp_info_free((*extra)->damp_info, 0);

                (*extra)->damp_info = NULL;

                XFREE(MTYPE_BGP_ROUTE_EXTRA, *extra);

                *extra = NULL;
        }
}

/* Get bgp_info extra information for the given bgp_info, lazy allocated
 * if required.
 */
struct bgp_info_extra *bgp_info_extra_get(struct bgp_info *ri)
{
        if (!ri->extra)
                ri->extra = bgp_info_extra_new();
        return ri->extra;
}

/* Allocate new bgp info structure. */
struct bgp_info *bgp_info_new(void)
{
        return XCALLOC(MTYPE_BGP_ROUTE, sizeof(struct bgp_info));
}

/* Free bgp route information. */
static void bgp_info_free(struct bgp_info *binfo)
{
        if (binfo->attr)
                bgp_attr_unintern(&binfo->attr);

        bgp_unlink_nexthop(binfo);
        bgp_info_extra_free(&binfo->extra);
        bgp_info_mpath_free(&binfo->mpath);

        peer_unlock(binfo->peer); /* bgp_info peer reference */

        XFREE(MTYPE_BGP_ROUTE, binfo);
}

struct bgp_info *bgp_info_lock(struct bgp_info *binfo)
{
        binfo->lock++;
        return binfo;
}

struct bgp_info *bgp_info_unlock(struct bgp_info *binfo)
{
        assert(binfo && binfo->lock > 0);
        binfo->lock--;

        if (binfo->lock == 0) {
#if 0
      zlog_debug ("%s: unlocked and freeing", __func__);
      zlog_backtrace (LOG_DEBUG);
#endif
                bgp_info_free(binfo);
                return NULL;
        }

#if 0
  if (binfo->lock == 1)
    {
      zlog_debug ("%s: unlocked to 1", __func__);
      zlog_backtrace (LOG_DEBUG);
    }
#endif

        return binfo;
}

void bgp_info_add(struct bgp_node *rn, struct bgp_info *ri)
{
        struct bgp_info *top;

        top = rn->info;

        ri->next = rn->info;
        ri->prev = NULL;
        if (top)
                top->prev = ri;
        rn->info = ri;

        bgp_info_lock(ri);
        bgp_lock_node(rn);
        peer_lock(ri->peer); /* bgp_info peer reference */
}

/* Do the actual removal of info from RIB, for use by bgp_process
   completion callback *only* */
void bgp_info_reap(struct bgp_node *rn, struct bgp_info *ri)
{
        if (ri->next)
                ri->next->prev = ri->prev;
        if (ri->prev)
                ri->prev->next = ri->next;
        else
                rn->info = ri->next;

        bgp_info_mpath_dequeue(ri);
        bgp_info_unlock(ri);
        bgp_unlock_node(rn);
}

void bgp_info_delete(struct bgp_node *rn, struct bgp_info *ri)
{
        bgp_info_set_flag(rn, ri, BGP_INFO_REMOVED);
        /* set of previous already took care of pcount */
        UNSET_FLAG(ri->flags, BGP_INFO_VALID);
}

/* undo the effects of a previous call to bgp_info_delete; typically
   called when a route is deleted and then quickly re-added before the
   deletion has been processed */
void bgp_info_restore(struct bgp_node *rn, struct bgp_info *ri)
{
        bgp_info_unset_flag(rn, ri, BGP_INFO_REMOVED);
        /* unset of previous already took care of pcount */
        SET_FLAG(ri->flags, BGP_INFO_VALID);
}

/* Adjust pcount as required */
static void bgp_pcount_adjust(struct bgp_node *rn, struct bgp_info *ri)
{
        struct bgp_table *table;

        assert(rn && bgp_node_table(rn));
        assert(ri && ri->peer && ri->peer->bgp);

        table = bgp_node_table(rn);

        if (ri->peer == ri->peer->bgp->peer_self)
                return;

        if (!BGP_INFO_COUNTABLE(ri)
            && CHECK_FLAG(ri->flags, BGP_INFO_COUNTED)) {

                UNSET_FLAG(ri->flags, BGP_INFO_COUNTED);

                /* slight hack, but more robust against errors. */
                if (ri->peer->pcount[table->afi][table->safi])
                        ri->peer->pcount[table->afi][table->safi]--;
                else {
                        zlog_warn(
                                "%s: Asked to decrement 0 prefix count for peer %s",
                                __func__, ri->peer->host);
                        zlog_backtrace(LOG_WARNING);
                        zlog_warn("%s: Please report to Quagga bugzilla",
                                  __func__);
                }
        } else if (BGP_INFO_COUNTABLE(ri)
                   && !CHECK_FLAG(ri->flags, BGP_INFO_COUNTED)) {
                SET_FLAG(ri->flags, BGP_INFO_COUNTED);
                ri->peer->pcount[table->afi][table->safi]++;
        }
}

static int bgp_label_index_differs(struct bgp_info *ri1, struct bgp_info *ri2)
{
        return (!(ri1->attr->label_index == ri2->attr->label_index));
}

/* Set/unset bgp_info flags, adjusting any other state as needed.
 * This is here primarily to keep prefix-count in check.
 */
void bgp_info_set_flag(struct bgp_node *rn, struct bgp_info *ri, uint32_t flag)
{
        SET_FLAG(ri->flags, flag);

        /* early bath if we know it's not a flag that changes countability state
         */
        if (!CHECK_FLAG(flag,
                        BGP_INFO_VALID | BGP_INFO_HISTORY | BGP_INFO_REMOVED))
                return;

        bgp_pcount_adjust(rn, ri);
}

void bgp_info_unset_flag(struct bgp_node *rn, struct bgp_info *ri,
                         uint32_t flag)
{
        UNSET_FLAG(ri->flags, flag);

        /* early bath if we know it's not a flag that changes countability state
         */
        if (!CHECK_FLAG(flag,
                        BGP_INFO_VALID | BGP_INFO_HISTORY | BGP_INFO_REMOVED))
                return;

        bgp_pcount_adjust(rn, ri);
}

/* Get MED value.  If MED value is missing and "bgp bestpath
   missing-as-worst" is specified, treat it as the worst value. */
static uint32_t bgp_med_value(struct attr *attr, struct bgp *bgp)
{
        if (attr->flag & ATTR_FLAG_BIT(BGP_ATTR_MULTI_EXIT_DISC))
                return attr->med;
        else {
                if (bgp_flag_check(bgp, BGP_FLAG_MED_MISSING_AS_WORST))
                        return BGP_MED_MAX;
                else
                        return 0;
        }
}

void bgp_info_path_with_addpath_rx_str(struct bgp_info *ri, char *buf)
{
        if (ri->addpath_rx_id)
                sprintf(buf, "path %s (addpath rxid %d)", ri->peer->host,
                        ri->addpath_rx_id);
        else
                sprintf(buf, "path %s", ri->peer->host);
}

/* Compare two bgp route entity.  If 'new' is preferable over 'exist' return 1.
 */
static int bgp_info_cmp(struct bgp *bgp, struct bgp_info *new,
                        struct bgp_info *exist, int *paths_eq,
                        struct bgp_maxpaths_cfg *mpath_cfg, int debug,
                        char *pfx_buf, afi_t afi, safi_t safi)
{
        struct attr *newattr, *existattr;
        bgp_peer_sort_t new_sort;
        bgp_peer_sort_t exist_sort;
        uint32_t new_pref;
        uint32_t exist_pref;
        uint32_t new_med;
        uint32_t exist_med;
        uint32_t new_weight;
        uint32_t exist_weight;
        uint32_t newm, existm;
        struct in_addr new_id;
        struct in_addr exist_id;
        int new_cluster;
        int exist_cluster;
        int internal_as_route;
        int confed_as_route;
        int ret = 0;
        char new_buf[PATH_ADDPATH_STR_BUFFER];
        char exist_buf[PATH_ADDPATH_STR_BUFFER];
        uint32_t new_mm_seq;
        uint32_t exist_mm_seq;

        *paths_eq = 0;

        /* 0. Null check. */
        if (new == NULL) {
                if (debug)
                        zlog_debug("%s: new is NULL", pfx_buf);
                return 0;
        }

        if (debug)
                bgp_info_path_with_addpath_rx_str(new, new_buf);

        if (exist == NULL) {
                if (debug)
                        zlog_debug("%s: %s is the initial bestpath", pfx_buf,
                                   new_buf);
                return 1;
        }

        if (debug) {
                bgp_info_path_with_addpath_rx_str(exist, exist_buf);
                zlog_debug("%s: Comparing %s flags 0x%x with %s flags 0x%x",
                           pfx_buf, new_buf, new->flags, exist_buf,
                           exist->flags);
        }

        newattr = new->attr;
        existattr = exist->attr;

        /* For EVPN routes, we cannot just go by local vs remote, we have to
         * look at the MAC mobility sequence number, if present.
         */
        if (safi == SAFI_EVPN) {
                /* This is an error condition described in RFC 7432 Section
                 * 15.2. The RFC
                 * states that in this scenario "the PE MUST alert the operator"
                 * but it
                 * does not state what other action to take. In order to provide
                 * some
                 * consistency in this scenario we are going to prefer the path
                 * with the
                 * sticky flag.
                 */
                if (newattr->sticky != existattr->sticky) {
                        if (!debug) {
                                prefix2str(&new->net->p, pfx_buf,
                                           sizeof(*pfx_buf)
                                                   * PREFIX2STR_BUFFER);
                                bgp_info_path_with_addpath_rx_str(new, new_buf);
                                bgp_info_path_with_addpath_rx_str(exist,
                                                                  exist_buf);
                        }

                        if (newattr->sticky && !existattr->sticky) {
                                zlog_warn(
                                        "%s: %s wins over %s due to sticky MAC flag",
                                        pfx_buf, new_buf, exist_buf);
                                return 1;
                        }

                        if (!newattr->sticky && existattr->sticky) {
                                zlog_warn(
                                        "%s: %s loses to %s due to sticky MAC flag",
                                        pfx_buf, new_buf, exist_buf);
                                return 0;
                        }
                }

                new_mm_seq = mac_mobility_seqnum(newattr);
                exist_mm_seq = mac_mobility_seqnum(existattr);

                if (new_mm_seq > exist_mm_seq) {
                        if (debug)
                                zlog_debug(
                                        "%s: %s wins over %s due to MM seq %u > %u",
                                        pfx_buf, new_buf, exist_buf, new_mm_seq,
                                        exist_mm_seq);
                        return 1;
                }

                if (new_mm_seq < exist_mm_seq) {
                        if (debug)
                                zlog_debug(
                                        "%s: %s loses to %s due to MM seq %u < %u",
                                        pfx_buf, new_buf, exist_buf, new_mm_seq,
                                        exist_mm_seq);
                        return 0;
                }
        }

        /* 1. Weight check. */
        new_weight = newattr->weight;
        exist_weight = existattr->weight;

        if (new_weight > exist_weight) {
                if (debug)
                        zlog_debug("%s: %s wins over %s due to weight %d > %d",
                                   pfx_buf, new_buf, exist_buf, new_weight,
                                   exist_weight);
                return 1;
        }

        if (new_weight < exist_weight) {
                if (debug)
                        zlog_debug("%s: %s loses to %s due to weight %d < %d",
                                   pfx_buf, new_buf, exist_buf, new_weight,
                                   exist_weight);
                return 0;
        }

        /* 2. Local preference check. */
        new_pref = exist_pref = bgp->default_local_pref;

        if (newattr->flag & ATTR_FLAG_BIT(BGP_ATTR_LOCAL_PREF))
                new_pref = newattr->local_pref;
        if (existattr->flag & ATTR_FLAG_BIT(BGP_ATTR_LOCAL_PREF))
                exist_pref = existattr->local_pref;

        if (new_pref > exist_pref) {
                if (debug)
                        zlog_debug(
                                "%s: %s wins over %s due to localpref %d > %d",
                                pfx_buf, new_buf, exist_buf, new_pref,
                                exist_pref);
                return 1;
        }

        if (new_pref < exist_pref) {
                if (debug)
                        zlog_debug(
                                "%s: %s loses to %s due to localpref %d < %d",
                                pfx_buf, new_buf, exist_buf, new_pref,
                                exist_pref);
                return 0;
        }

        /* 3. Local route check. We prefer:
         *  - BGP_ROUTE_STATIC
         *  - BGP_ROUTE_AGGREGATE
         *  - BGP_ROUTE_REDISTRIBUTE
         */
        if (!(new->sub_type == BGP_ROUTE_NORMAL ||
              new->sub_type == BGP_ROUTE_IMPORTED)) {
                if (debug)
                        zlog_debug(
                                "%s: %s wins over %s due to preferred BGP_ROUTE type",
                                pfx_buf, new_buf, exist_buf);
                return 1;
        }

        if (!(exist->sub_type == BGP_ROUTE_NORMAL ||
              new->sub_type == BGP_ROUTE_IMPORTED)) {
                if (debug)
                        zlog_debug(
                                "%s: %s loses to %s due to preferred BGP_ROUTE type",
                                pfx_buf, new_buf, exist_buf);
                return 0;
        }

        /* 4. AS path length check. */
        if (!bgp_flag_check(bgp, BGP_FLAG_ASPATH_IGNORE)) {
                int exist_hops = aspath_count_hops(existattr->aspath);
                int exist_confeds = aspath_count_confeds(existattr->aspath);

                if (bgp_flag_check(bgp, BGP_FLAG_ASPATH_CONFED)) {
                        int aspath_hops;

                        aspath_hops = aspath_count_hops(newattr->aspath);
                        aspath_hops += aspath_count_confeds(newattr->aspath);

                        if (aspath_hops < (exist_hops + exist_confeds)) {
                                if (debug)
                                        zlog_debug(
                                                "%s: %s wins over %s due to aspath (with confeds) hopcount %d < %d",
                                                pfx_buf, new_buf, exist_buf,
                                                aspath_hops,
                                                (exist_hops + exist_confeds));
                                return 1;
                        }

                        if (aspath_hops > (exist_hops + exist_confeds)) {
                                if (debug)
                                        zlog_debug(
                                                "%s: %s loses to %s due to aspath (with confeds) hopcount %d > %d",
                                                pfx_buf, new_buf, exist_buf,
                                                aspath_hops,
                                                (exist_hops + exist_confeds));
                                return 0;
                        }
                } else {
                        int newhops = aspath_count_hops(newattr->aspath);

                        if (newhops < exist_hops) {
                                if (debug)
                                        zlog_debug(
                                                "%s: %s wins over %s due to aspath hopcount %d < %d",
                                                pfx_buf, new_buf, exist_buf,
                                                newhops, exist_hops);
                                return 1;
                        }

                        if (newhops > exist_hops) {
                                if (debug)
                                        zlog_debug(
                                                "%s: %s loses to %s due to aspath hopcount %d > %d",
                                                pfx_buf, new_buf, exist_buf,
                                                newhops, exist_hops);
                                return 0;
                        }
                }
        }

        /* 5. Origin check. */
        if (newattr->origin < existattr->origin) {
                if (debug)
                        zlog_debug("%s: %s wins over %s due to ORIGIN %s < %s",
                                   pfx_buf, new_buf, exist_buf,
                                   bgp_origin_long_str[newattr->origin],
                                   bgp_origin_long_str[existattr->origin]);
                return 1;
        }

        if (newattr->origin > existattr->origin) {
                if (debug)
                        zlog_debug("%s: %s loses to %s due to ORIGIN %s > %s",
                                   pfx_buf, new_buf, exist_buf,
                                   bgp_origin_long_str[newattr->origin],
                                   bgp_origin_long_str[existattr->origin]);
                return 0;
        }

        /* 6. MED check. */
        internal_as_route = (aspath_count_hops(newattr->aspath) == 0
                             && aspath_count_hops(existattr->aspath) == 0);
        confed_as_route = (aspath_count_confeds(newattr->aspath) > 0
                           && aspath_count_confeds(existattr->aspath) > 0
                           && aspath_count_hops(newattr->aspath) == 0
                           && aspath_count_hops(existattr->aspath) == 0);

        if (bgp_flag_check(bgp, BGP_FLAG_ALWAYS_COMPARE_MED)
            || (bgp_flag_check(bgp, BGP_FLAG_MED_CONFED) && confed_as_route)
            || aspath_cmp_left(newattr->aspath, existattr->aspath)
            || aspath_cmp_left_confed(newattr->aspath, existattr->aspath)
            || internal_as_route) {
                new_med = bgp_med_value(new->attr, bgp);
                exist_med = bgp_med_value(exist->attr, bgp);

                if (new_med < exist_med) {
                        if (debug)
                                zlog_debug(
                                        "%s: %s wins over %s due to MED %d < %d",
                                        pfx_buf, new_buf, exist_buf, new_med,
                                        exist_med);
                        return 1;
                }

                if (new_med > exist_med) {
                        if (debug)
                                zlog_debug(
                                        "%s: %s loses to %s due to MED %d > %d",
                                        pfx_buf, new_buf, exist_buf, new_med,
                                        exist_med);
                        return 0;
                }
        }

        /* 7. Peer type check. */
        new_sort = new->peer->sort;
        exist_sort = exist->peer->sort;

        if (new_sort == BGP_PEER_EBGP
            && (exist_sort == BGP_PEER_IBGP || exist_sort == BGP_PEER_CONFED)) {
                if (debug)
                        zlog_debug(
                                "%s: %s wins over %s due to eBGP peer > iBGP peer",
                                pfx_buf, new_buf, exist_buf);
                return 1;
        }

        if (exist_sort == BGP_PEER_EBGP
            && (new_sort == BGP_PEER_IBGP || new_sort == BGP_PEER_CONFED)) {
                if (debug)
                        zlog_debug(
                                "%s: %s loses to %s due to iBGP peer < eBGP peer",
                                pfx_buf, new_buf, exist_buf);
                return 0;
        }

        /* 8. IGP metric check. */
        newm = existm = 0;

        if (new->extra)
                newm = new->extra->igpmetric;
        if (exist->extra)
                existm = exist->extra->igpmetric;

        if (newm < existm) {
                if (debug)
                        zlog_debug(
                                "%s: %s wins over %s due to IGP metric %d < %d",
                                pfx_buf, new_buf, exist_buf, newm, existm);
                ret = 1;
        }

        if (newm > existm) {
                if (debug)
                        zlog_debug(
                                "%s: %s loses to %s due to IGP metric %d > %d",
                                pfx_buf, new_buf, exist_buf, newm, existm);
                ret = 0;
        }

        /* 9. Same IGP metric. Compare the cluster list length as
           representative of IGP hops metric. Rewrite the metric value
           pair (newm, existm) with the cluster list length. Prefer the
           path with smaller cluster list length.                       */
        if (newm == existm) {
                if (peer_sort(new->peer) == BGP_PEER_IBGP
                    && peer_sort(exist->peer) == BGP_PEER_IBGP
                    && (mpath_cfg == NULL
                        || CHECK_FLAG(
                                   mpath_cfg->ibgp_flags,
                                   BGP_FLAG_IBGP_MULTIPATH_SAME_CLUSTERLEN))) {
                        newm = BGP_CLUSTER_LIST_LENGTH(new->attr);
                        existm = BGP_CLUSTER_LIST_LENGTH(exist->attr);

                        if (newm < existm) {
                                if (debug)
                                        zlog_debug(
                                                "%s: %s wins over %s due to CLUSTER_LIST length %d < %d",
                                                pfx_buf, new_buf, exist_buf,
                                                newm, existm);
                                ret = 1;
                        }

                        if (newm > existm) {
                                if (debug)
                                        zlog_debug(
                                                "%s: %s loses to %s due to CLUSTER_LIST length %d > %d",
                                                pfx_buf, new_buf, exist_buf,
                                                newm, existm);
                                ret = 0;
                        }
                }
        }

        /* 10. confed-external vs. confed-internal */
        if (CHECK_FLAG(bgp->config, BGP_CONFIG_CONFEDERATION)) {
                if (new_sort == BGP_PEER_CONFED
                    && exist_sort == BGP_PEER_IBGP) {
                        if (debug)
                                zlog_debug(
                                        "%s: %s wins over %s due to confed-external peer > confed-internal peer",
                                        pfx_buf, new_buf, exist_buf);
                        return 1;
                }

                if (exist_sort == BGP_PEER_CONFED
                    && new_sort == BGP_PEER_IBGP) {
                        if (debug)
                                zlog_debug(
                                        "%s: %s loses to %s due to confed-internal peer < confed-external peer",
                                        pfx_buf, new_buf, exist_buf);
                        return 0;
                }
        }

        /* 11. Maximum path check. */
        if (newm == existm) {
                /* If one path has a label but the other does not, do not treat
                 * them as equals for multipath
                 */
                if ((new->extra &&bgp_is_valid_label(&new->extra->label[0]))
                    != (exist->extra
                        && bgp_is_valid_label(&exist->extra->label[0]))) {
                        if (debug)
                                zlog_debug(
                                        "%s: %s and %s cannot be multipath, one has a label while the other does not",
                                        pfx_buf, new_buf, exist_buf);
                } else if (bgp_flag_check(bgp,
                                          BGP_FLAG_ASPATH_MULTIPATH_RELAX)) {

                        /*
                         * For the two paths, all comparison steps till IGP
                         * metric
                         * have succeeded - including AS_PATH hop count. Since
                         * 'bgp
                         * bestpath as-path multipath-relax' knob is on, we
                         * don't need
                         * an exact match of AS_PATH. Thus, mark the paths are
                         * equal.
                         * That will trigger both these paths to get into the
                         * multipath
                         * array.
                         */
                        *paths_eq = 1;

                        if (debug)
                                zlog_debug(
                                        "%s: %s and %s are equal via multipath-relax",
                                        pfx_buf, new_buf, exist_buf);
                } else if (new->peer->sort == BGP_PEER_IBGP) {
                        if (aspath_cmp(new->attr->aspath,
                                       exist->attr->aspath)) {
                                *paths_eq = 1;

                                if (debug)
                                        zlog_debug(
                                                "%s: %s and %s are equal via matching aspaths",
                                                pfx_buf, new_buf, exist_buf);
                        }
                } else if (new->peer->as == exist->peer->as) {
                        *paths_eq = 1;

                        if (debug)
                                zlog_debug(
                                        "%s: %s and %s are equal via same remote-as",
                                        pfx_buf, new_buf, exist_buf);
                }
        } else {
                /*
                 * TODO: If unequal cost ibgp multipath is enabled we can
                 * mark the paths as equal here instead of returning
                 */
                if (debug) {
                        if (ret == 1)
                                zlog_debug(
                                        "%s: %s wins over %s after IGP metric comparison",
                                        pfx_buf, new_buf, exist_buf);
                        else
                                zlog_debug(
                                        "%s: %s loses to %s after IGP metric comparison",
                                        pfx_buf, new_buf, exist_buf);
                }
                return ret;
        }

        /* 12. If both paths are external, prefer the path that was received
           first (the oldest one).  This step minimizes route-flap, since a
           newer path won't displace an older one, even if it was the
           preferred route based on the additional decision criteria below.  */
        if (!bgp_flag_check(bgp, BGP_FLAG_COMPARE_ROUTER_ID)
            && new_sort == BGP_PEER_EBGP && exist_sort == BGP_PEER_EBGP) {
                if (CHECK_FLAG(new->flags, BGP_INFO_SELECTED)) {
                        if (debug)
                                zlog_debug(
                                        "%s: %s wins over %s due to oldest external",
                                        pfx_buf, new_buf, exist_buf);
                        return 1;
                }

                if (CHECK_FLAG(exist->flags, BGP_INFO_SELECTED)) {
                        if (debug)
                                zlog_debug(
                                        "%s: %s loses to %s due to oldest external",
                                        pfx_buf, new_buf, exist_buf);
                        return 0;
                }
        }

        /* 13. Router-ID comparision. */
        /* If one of the paths is "stale", the corresponding peer router-id will
         * be 0 and would always win over the other path. If originator id is
         * used for the comparision, it will decide which path is better.
         */
        if (newattr->flag & ATTR_FLAG_BIT(BGP_ATTR_ORIGINATOR_ID))
                new_id.s_addr = newattr->originator_id.s_addr;
        else
                new_id.s_addr = new->peer->remote_id.s_addr;
        if (existattr->flag & ATTR_FLAG_BIT(BGP_ATTR_ORIGINATOR_ID))
                exist_id.s_addr = existattr->originator_id.s_addr;
        else
                exist_id.s_addr = exist->peer->remote_id.s_addr;

        if (ntohl(new_id.s_addr) < ntohl(exist_id.s_addr)) {
                if (debug)
                        zlog_debug(
                                "%s: %s wins over %s due to Router-ID comparison",
                                pfx_buf, new_buf, exist_buf);
                return 1;
        }

        if (ntohl(new_id.s_addr) > ntohl(exist_id.s_addr)) {
                if (debug)
                        zlog_debug(
                                "%s: %s loses to %s due to Router-ID comparison",
                                pfx_buf, new_buf, exist_buf);
                return 0;
        }

        /* 14. Cluster length comparision. */
        new_cluster = BGP_CLUSTER_LIST_LENGTH(new->attr);
        exist_cluster = BGP_CLUSTER_LIST_LENGTH(exist->attr);

        if (new_cluster < exist_cluster) {
                if (debug)
                        zlog_debug(
                                "%s: %s wins over %s due to CLUSTER_LIST length %d < %d",
                                pfx_buf, new_buf, exist_buf, new_cluster,
                                exist_cluster);
                return 1;
        }

        if (new_cluster > exist_cluster) {
                if (debug)
                        zlog_debug(
                                "%s: %s loses to %s due to CLUSTER_LIST length %d > %d",
                                pfx_buf, new_buf, exist_buf, new_cluster,
                                exist_cluster);
                return 0;
        }

        /* 15. Neighbor address comparision. */
        /* Do this only if neither path is "stale" as stale paths do not have
         * valid peer information (as the connection may or may not be up).
         */
        if (CHECK_FLAG(exist->flags, BGP_INFO_STALE)) {
                if (debug)
                        zlog_debug(
                                "%s: %s wins over %s due to latter path being STALE",
                                pfx_buf, new_buf, exist_buf);
                return 1;
        }

        if (CHECK_FLAG(new->flags, BGP_INFO_STALE)) {
                if (debug)
                        zlog_debug(
                                "%s: %s loses to %s due to former path being STALE",
                                pfx_buf, new_buf, exist_buf);
                return 0;
        }

        /* locally configured routes to advertise do not have su_remote */
        if (new->peer->su_remote == NULL)
                return 0;
        if (exist->peer->su_remote == NULL)
                return 1;

        ret = sockunion_cmp(new->peer->su_remote, exist->peer->su_remote);

        if (ret == 1) {
                if (debug)
                        zlog_debug(
                                "%s: %s loses to %s due to Neighor IP comparison",
                                pfx_buf, new_buf, exist_buf);
                return 0;
        }

        if (ret == -1) {
                if (debug)
                        zlog_debug(
                                "%s: %s wins over %s due to Neighor IP comparison",
                                pfx_buf, new_buf, exist_buf);
                return 1;
        }

        if (debug)
                zlog_debug("%s: %s wins over %s due to nothing left to compare",
                           pfx_buf, new_buf, exist_buf);

        return 1;
}

/* Compare two bgp route entity.  Return -1 if new is preferred, 1 if exist
 * is preferred, or 0 if they are the same (usually will only occur if
 * multipath is enabled
 * This version is compatible with */
int bgp_info_cmp_compatible(struct bgp *bgp, struct bgp_info *new,
                            struct bgp_info *exist, char *pfx_buf, afi_t afi,
                            safi_t safi)
{
        int paths_eq;
        int ret;
        ret = bgp_info_cmp(bgp, new, exist, &paths_eq, NULL, 0, pfx_buf, afi,
                           safi);

        if (paths_eq)
                ret = 0;
        else {
                if (ret == 1)
                        ret = -1;
                else
                        ret = 1;
        }
        return ret;
}

static enum filter_type bgp_input_filter(struct peer *peer, struct prefix *p,
                                         struct attr *attr, afi_t afi,
                                         safi_t safi)
{
        struct bgp_filter *filter;

        filter = &peer->filter[afi][safi];

#define FILTER_EXIST_WARN(F, f, filter)                                        \
        if (BGP_DEBUG(update, UPDATE_IN) && !(F##_IN(filter)))                 \
                zlog_warn("%s: Could not find configured input %s-list %s!",   \
                          peer->host, #f, F##_IN_NAME(filter));

        if (DISTRIBUTE_IN_NAME(filter)) {
                FILTER_EXIST_WARN(DISTRIBUTE, distribute, filter);

                if (access_list_apply(DISTRIBUTE_IN(filter), p) == FILTER_DENY)
                        return FILTER_DENY;
        }

        if (PREFIX_LIST_IN_NAME(filter)) {
                FILTER_EXIST_WARN(PREFIX_LIST, prefix, filter);

                if (prefix_list_apply(PREFIX_LIST_IN(filter), p) == PREFIX_DENY)
                        return FILTER_DENY;
        }

        if (FILTER_LIST_IN_NAME(filter)) {
                FILTER_EXIST_WARN(FILTER_LIST, as, filter);

                if (as_list_apply(FILTER_LIST_IN(filter), attr->aspath)
                    == AS_FILTER_DENY)
                        return FILTER_DENY;
        }

        return FILTER_PERMIT;
#undef FILTER_EXIST_WARN
}

static enum filter_type bgp_output_filter(struct peer *peer, struct prefix *p,
                                          struct attr *attr, afi_t afi,
                                          safi_t safi)
{
        struct bgp_filter *filter;

        filter = &peer->filter[afi][safi];

#define FILTER_EXIST_WARN(F, f, filter)                                        \
        if (BGP_DEBUG(update, UPDATE_OUT) && !(F##_OUT(filter)))               \
                zlog_warn("%s: Could not find configured output %s-list %s!",  \
                          peer->host, #f, F##_OUT_NAME(filter));

        if (DISTRIBUTE_OUT_NAME(filter)) {
                FILTER_EXIST_WARN(DISTRIBUTE, distribute, filter);

                if (access_list_apply(DISTRIBUTE_OUT(filter), p) == FILTER_DENY)
                        return FILTER_DENY;
        }

        if (PREFIX_LIST_OUT_NAME(filter)) {
                FILTER_EXIST_WARN(PREFIX_LIST, prefix, filter);

                if (prefix_list_apply(PREFIX_LIST_OUT(filter), p)
                    == PREFIX_DENY)
                        return FILTER_DENY;
        }

        if (FILTER_LIST_OUT_NAME(filter)) {
                FILTER_EXIST_WARN(FILTER_LIST, as, filter);

                if (as_list_apply(FILTER_LIST_OUT(filter), attr->aspath)
                    == AS_FILTER_DENY)
                        return FILTER_DENY;
        }

        return FILTER_PERMIT;
#undef FILTER_EXIST_WARN
}

/* If community attribute includes no_export then return 1. */
static int bgp_community_filter(struct peer *peer, struct attr *attr)
{
        if (attr->community) {
                /* NO_ADVERTISE check. */
                if (community_include(attr->community, COMMUNITY_NO_ADVERTISE))
                        return 1;

                /* NO_EXPORT check. */
                if (peer->sort == BGP_PEER_EBGP
                    && community_include(attr->community, COMMUNITY_NO_EXPORT))
                        return 1;

                /* NO_EXPORT_SUBCONFED check. */
                if (peer->sort == BGP_PEER_EBGP
                    || peer->sort == BGP_PEER_CONFED)
                        if (community_include(attr->community,
                                              COMMUNITY_NO_EXPORT_SUBCONFED))
                                return 1;
        }
        return 0;
}

/* Route reflection loop check.  */
static int bgp_cluster_filter(struct peer *peer, struct attr *attr)
{
        struct in_addr cluster_id;

        if (attr->cluster) {
                if (peer->bgp->config & BGP_CONFIG_CLUSTER_ID)
                        cluster_id = peer->bgp->cluster_id;
                else
                        cluster_id = peer->bgp->router_id;

                if (cluster_loop_check(attr->cluster, cluster_id))
                        return 1;
        }
        return 0;
}

static int bgp_input_modifier(struct peer *peer, struct prefix *p,
                              struct attr *attr, afi_t afi, safi_t safi,
                              const char *rmap_name)
{
        struct bgp_filter *filter;
        struct bgp_info info;
        route_map_result_t ret;
        struct route_map *rmap = NULL;

        filter = &peer->filter[afi][safi];

        /* Apply default weight value. */
        if (peer->weight[afi][safi])
                attr->weight = peer->weight[afi][safi];

        if (rmap_name) {
                rmap = route_map_lookup_by_name(rmap_name);

                if (rmap == NULL)
                        return RMAP_DENY;
        } else {
                if (ROUTE_MAP_IN_NAME(filter)) {
                        rmap = ROUTE_MAP_IN(filter);

                        if (rmap == NULL)
                                return RMAP_DENY;
                }
        }

        /* Route map apply. */
        if (rmap) {
                /* Duplicate current value to new strucutre for modification. */
                info.peer = peer;
                info.attr = attr;

                SET_FLAG(peer->rmap_type, PEER_RMAP_TYPE_IN);

                /* Apply BGP route map to the attribute. */
                ret = route_map_apply(rmap, p, RMAP_BGP, &info);

                peer->rmap_type = 0;

                if (ret == RMAP_DENYMATCH) {
                        /* Free newly generated AS path and community by
                         * route-map. */
                        bgp_attr_flush(attr);
                        return RMAP_DENY;
                }
        }
        return RMAP_PERMIT;
}

static int bgp_output_modifier(struct peer *peer, struct prefix *p,
                               struct attr *attr, afi_t afi, safi_t safi,
                               const char *rmap_name)
{
        struct bgp_info info;
        route_map_result_t ret;
        struct route_map *rmap = NULL;
        uint8_t rmap_type;

        /*
         * So if we get to this point and have no rmap_name
         * we want to just show the output as it currently
         * exists.
         */
        if (!rmap_name)
                return RMAP_PERMIT;

        /* Apply default weight value. */
        if (peer->weight[afi][safi])
                attr->weight = peer->weight[afi][safi];

        rmap = route_map_lookup_by_name(rmap_name);

        /*
         * If we have a route map name and we do not find
         * the routemap that means we have an implicit
         * deny.
         */
        if (rmap == NULL)
                return RMAP_DENY;

        /* Route map apply. */
        /* Duplicate current value to new strucutre for modification. */
        info.peer = peer;
        info.attr = attr;

        rmap_type = peer->rmap_type;
        SET_FLAG(peer->rmap_type, PEER_RMAP_TYPE_OUT);

        /* Apply BGP route map to the attribute. */
        ret = route_map_apply(rmap, p, RMAP_BGP, &info);

        peer->rmap_type = rmap_type;

        if (ret == RMAP_DENYMATCH)
                /*
                 * caller has multiple error paths with bgp_attr_flush()
                 */
                return RMAP_DENY;

        return RMAP_PERMIT;
}

/* If this is an EBGP peer with remove-private-AS */
static void bgp_peer_remove_private_as(struct bgp *bgp, afi_t afi, safi_t safi,
                                       struct peer *peer, struct attr *attr)
{
        if (peer->sort == BGP_PEER_EBGP
            && (peer_af_flag_check(peer, afi, safi,
                                   PEER_FLAG_REMOVE_PRIVATE_AS_ALL_REPLACE)
                || peer_af_flag_check(peer, afi, safi,
                                      PEER_FLAG_REMOVE_PRIVATE_AS_REPLACE)
                || peer_af_flag_check(peer, afi, safi,
                                      PEER_FLAG_REMOVE_PRIVATE_AS_ALL)
                || peer_af_flag_check(peer, afi, safi,
                                      PEER_FLAG_REMOVE_PRIVATE_AS))) {
                // Take action on the entire aspath
                if (peer_af_flag_check(peer, afi, safi,
                                       PEER_FLAG_REMOVE_PRIVATE_AS_ALL_REPLACE)
                    || peer_af_flag_check(peer, afi, safi,
                                          PEER_FLAG_REMOVE_PRIVATE_AS_ALL)) {
                        if (peer_af_flag_check(
                                    peer, afi, safi,
                                    PEER_FLAG_REMOVE_PRIVATE_AS_ALL_REPLACE))
                                attr->aspath = aspath_replace_private_asns(
                                        attr->aspath, bgp->as);

                        // The entire aspath consists of private ASNs so create
                        // an empty aspath
                        else if (aspath_private_as_check(attr->aspath))
                                attr->aspath = aspath_empty_get();

                        // There are some public and some private ASNs, remove
                        // the private ASNs
                        else
                                attr->aspath = aspath_remove_private_asns(
                                        attr->aspath);
                }

                // 'all' was not specified so the entire aspath must be private
                // ASNs
                // for us to do anything
                else if (aspath_private_as_check(attr->aspath)) {
                        if (peer_af_flag_check(
                                    peer, afi, safi,
                                    PEER_FLAG_REMOVE_PRIVATE_AS_REPLACE))
                                attr->aspath = aspath_replace_private_asns(
                                        attr->aspath, bgp->as);
                        else
                                attr->aspath = aspath_empty_get();
                }
        }
}

/* If this is an EBGP peer with as-override */
static void bgp_peer_as_override(struct bgp *bgp, afi_t afi, safi_t safi,
                                 struct peer *peer, struct attr *attr)
{
        if (peer->sort == BGP_PEER_EBGP
            && peer_af_flag_check(peer, afi, safi, PEER_FLAG_AS_OVERRIDE)) {
                if (aspath_single_asn_check(attr->aspath, peer->as))
                        attr->aspath = aspath_replace_specific_asn(
                                attr->aspath, peer->as, bgp->as);
        }
}

void bgp_attr_add_gshut_community(struct attr *attr)
{
        struct community *old;
        struct community *new;
        struct community *merge;
        struct community *gshut;

        old = attr->community;
        gshut = community_str2com("graceful-shutdown");

        if (old) {
                merge = community_merge(community_dup(old), gshut);

                if (old->refcnt == 0)
                        community_free(old);

                new = community_uniq_sort(merge);
                community_free(merge);
        } else {
                new = community_dup(gshut);
        }

        community_free(gshut);
        attr->community = new;
        attr->flag |= ATTR_FLAG_BIT(BGP_ATTR_COMMUNITIES);

        /* When we add the graceful-shutdown community we must also
         * lower the local-preference */
        attr->flag |= ATTR_FLAG_BIT(BGP_ATTR_LOCAL_PREF);
        attr->local_pref = BGP_GSHUT_LOCAL_PREF;
}


static void subgroup_announce_reset_nhop(uint8_t family, struct attr *attr)
{
        if (family == AF_INET)
                attr->nexthop.s_addr = 0;
        if (family == AF_INET6)
                memset(&attr->mp_nexthop_global, 0, IPV6_MAX_BYTELEN);
}

int subgroup_announce_check(struct bgp_node *rn, struct bgp_info *ri,
                            struct update_subgroup *subgrp, struct prefix *p,
                            struct attr *attr)
{
        struct bgp_filter *filter;
        struct peer *from;
        struct peer *peer;
        struct peer *onlypeer;
        struct bgp *bgp;
        struct attr *riattr;
        char buf[PREFIX_STRLEN];
        int ret;
        int transparent;
        int reflect;
        afi_t afi;
        safi_t safi;
        int samepeer_safe = 0; /* for synthetic mplsvpns routes */

        if (DISABLE_BGP_ANNOUNCE)
                return 0;

        afi = SUBGRP_AFI(subgrp);
        safi = SUBGRP_SAFI(subgrp);
        peer = SUBGRP_PEER(subgrp);
        onlypeer = NULL;
        if (CHECK_FLAG(peer->flags, PEER_FLAG_LONESOUL))
                onlypeer = SUBGRP_PFIRST(subgrp)->peer;

        from = ri->peer;
        filter = &peer->filter[afi][safi];
        bgp = SUBGRP_INST(subgrp);
        riattr = bgp_info_mpath_count(ri) ? bgp_info_mpath_attr(ri) : ri->attr;

#if ENABLE_BGP_VNC
        if (((afi == AFI_IP) || (afi == AFI_IP6)) && (safi == SAFI_MPLS_VPN)
            && ((ri->type == ZEBRA_ROUTE_BGP_DIRECT)
                || (ri->type == ZEBRA_ROUTE_BGP_DIRECT_EXT))) {

                /*
                 * direct and direct_ext type routes originate internally even
                 * though they can have peer pointers that reference other
                 * systems
                 */
                prefix2str(p, buf, PREFIX_STRLEN);
                zlog_debug("%s: pfx %s bgp_direct->vpn route peer safe",
                           __func__, buf);
                samepeer_safe = 1;
        }
#endif

        if (((afi == AFI_IP) || (afi == AFI_IP6))
            && ((safi == SAFI_MPLS_VPN) || (safi == SAFI_UNICAST))
            && (ri->type == ZEBRA_ROUTE_BGP)
            && (ri->sub_type == BGP_ROUTE_IMPORTED)) {

                /* Applies to routes leaked vpn->vrf and vrf->vpn */

                samepeer_safe = 1;
        }

        /* With addpath we may be asked to TX all kinds of paths so make sure
         * ri is valid */
        if (!CHECK_FLAG(ri->flags, BGP_INFO_VALID)
            || CHECK_FLAG(ri->flags, BGP_INFO_HISTORY)
            || CHECK_FLAG(ri->flags, BGP_INFO_REMOVED)) {
                return 0;
        }

        /* If this is not the bestpath then check to see if there is an enabled
         * addpath
         * feature that requires us to advertise it */
        if (!CHECK_FLAG(ri->flags, BGP_INFO_SELECTED)) {
                if (!bgp_addpath_tx_path(peer, afi, safi, ri)) {
                        return 0;
                }
        }

        /* Aggregate-address suppress check. */
        if (ri->extra && ri->extra->suppress)
                if (!UNSUPPRESS_MAP_NAME(filter)) {
                        return 0;
                }

        /* If it's labeled safi, make sure the route has a valid label. */
        if (safi == SAFI_LABELED_UNICAST) {
                mpls_label_t label = bgp_adv_label(rn, ri, peer, afi, safi);
                if (!bgp_is_valid_label(&label)) {
                        if (bgp_debug_update(NULL, p, subgrp->update_group, 0))
                                zlog_debug("u%" PRIu64 ":s%" PRIu64
                                           " %s/%d is filtered - no label (%p)",
                                           subgrp->update_group->id, subgrp->id,
                                           inet_ntop(p->family, &p->u.prefix,
                                                     buf, SU_ADDRSTRLEN),
                                           p->prefixlen, &label);
                        return 0;
                }
        }

        /* Do not send back route to sender. */
        if (onlypeer && from == onlypeer) {
                return 0;
        }

        /* Do not send the default route in the BGP table if the neighbor is
         * configured for default-originate */
        if (CHECK_FLAG(peer->af_flags[afi][safi],
                       PEER_FLAG_DEFAULT_ORIGINATE)) {
                if (p->family == AF_INET && p->u.prefix4.s_addr == INADDR_ANY)
                        return 0;
                else if (p->family == AF_INET6 && p->prefixlen == 0)
                        return 0;
        }

        /* Transparency check. */
        if (CHECK_FLAG(peer->af_flags[afi][safi], PEER_FLAG_RSERVER_CLIENT)
            && CHECK_FLAG(from->af_flags[afi][safi], PEER_FLAG_RSERVER_CLIENT))
                transparent = 1;
        else
                transparent = 0;

        /* If community is not disabled check the no-export and local. */
        if (!transparent && bgp_community_filter(peer, riattr)) {
                if (bgp_debug_update(NULL, p, subgrp->update_group, 0))
                        zlog_debug(
                                "subgrpannouncecheck: community filter check fail");
                return 0;
        }

        /* If the attribute has originator-id and it is same as remote
           peer's id. */
        if (onlypeer && riattr->flag & ATTR_FLAG_BIT(BGP_ATTR_ORIGINATOR_ID)
            && (IPV4_ADDR_SAME(&onlypeer->remote_id, &riattr->originator_id))) {
                if (bgp_debug_update(NULL, p, subgrp->update_group, 0))
                        zlog_debug(
                                "%s [Update:SEND] %s originator-id is same as "
                                "remote router-id",
                                onlypeer->host,
                                prefix2str(p, buf, sizeof(buf)));
                return 0;
        }

        /* ORF prefix-list filter check */
        if (CHECK_FLAG(peer->af_cap[afi][safi], PEER_CAP_ORF_PREFIX_RM_ADV)
            && (CHECK_FLAG(peer->af_cap[afi][safi], PEER_CAP_ORF_PREFIX_SM_RCV)
                || CHECK_FLAG(peer->af_cap[afi][safi],
                              PEER_CAP_ORF_PREFIX_SM_OLD_RCV)))
                if (peer->orf_plist[afi][safi]) {
                        if (prefix_list_apply(peer->orf_plist[afi][safi], p)
                            == PREFIX_DENY) {
                                if (bgp_debug_update(NULL, p,
                                                     subgrp->update_group, 0))
                                        zlog_debug(
                                                "%s [Update:SEND] %s is filtered via ORF",
                                                peer->host,
                                                prefix2str(p, buf,
                                                           sizeof(buf)));
                                return 0;
                        }
                }

        /* Output filter check. */
        if (bgp_output_filter(peer, p, riattr, afi, safi) == FILTER_DENY) {
                if (bgp_debug_update(NULL, p, subgrp->update_group, 0))
                        zlog_debug("%s [Update:SEND] %s is filtered",
                                   peer->host, prefix2str(p, buf, sizeof(buf)));
                return 0;
        }

#ifdef BGP_SEND_ASPATH_CHECK
        /* AS path loop check. */
        if (onlypeer && aspath_loop_check(riattr->aspath, onlypeer->as)) {
                if (bgp_debug_update(NULL, p, subgrp->update_group, 0))
                        zlog_debug(
                                "%s [Update:SEND] suppress announcement to peer AS %u "
                                "that is part of AS path.",
                                onlypeer->host, onlypeer->as);
                return 0;
        }
#endif /* BGP_SEND_ASPATH_CHECK */

        /* If we're a CONFED we need to loop check the CONFED ID too */
        if (CHECK_FLAG(bgp->config, BGP_CONFIG_CONFEDERATION)) {
                if (aspath_loop_check(riattr->aspath, bgp->confed_id)) {
                        if (bgp_debug_update(NULL, p, subgrp->update_group, 0))
                                zlog_debug(
                                        "%s [Update:SEND] suppress announcement to peer AS %u"
                                        " is AS path.",
                                        peer->host, bgp->confed_id);
                        return 0;
                }
        }

        /* Route-Reflect check. */
        if (from->sort == BGP_PEER_IBGP && peer->sort == BGP_PEER_IBGP)
                reflect = 1;
        else
                reflect = 0;

        /* IBGP reflection check. */
        if (reflect && !samepeer_safe) {
                /* A route from a Client peer. */
                if (CHECK_FLAG(from->af_flags[afi][safi],
                               PEER_FLAG_REFLECTOR_CLIENT)) {
                        /* Reflect to all the Non-Client peers and also to the
                           Client peers other than the originator.  Originator
                           check
                           is already done.  So there is noting to do. */
                        /* no bgp client-to-client reflection check. */
                        if (bgp_flag_check(bgp, BGP_FLAG_NO_CLIENT_TO_CLIENT))
                                if (CHECK_FLAG(peer->af_flags[afi][safi],
                                               PEER_FLAG_REFLECTOR_CLIENT))
                                        return 0;
                } else {
                        /* A route from a Non-client peer. Reflect to all other
                           clients. */
                        if (!CHECK_FLAG(peer->af_flags[afi][safi],
                                        PEER_FLAG_REFLECTOR_CLIENT))
                                return 0;
                }
        }

        /* For modify attribute, copy it to temporary structure. */
        bgp_attr_dup(attr, riattr);

        /* If local-preference is not set. */
        if ((peer->sort == BGP_PEER_IBGP || peer->sort == BGP_PEER_CONFED)
            && (!(attr->flag & ATTR_FLAG_BIT(BGP_ATTR_LOCAL_PREF)))) {
                attr->flag |= ATTR_FLAG_BIT(BGP_ATTR_LOCAL_PREF);
                attr->local_pref = bgp->default_local_pref;
        }

        /* If originator-id is not set and the route is to be reflected,
           set the originator id */
        if (reflect
            && (!(attr->flag & ATTR_FLAG_BIT(BGP_ATTR_ORIGINATOR_ID)))) {
                IPV4_ADDR_COPY(&(attr->originator_id), &(from->remote_id));
                SET_FLAG(attr->flag, BGP_ATTR_ORIGINATOR_ID);
        }

        /* Remove MED if its an EBGP peer - will get overwritten by route-maps
         */
        if (peer->sort == BGP_PEER_EBGP
            && attr->flag & ATTR_FLAG_BIT(BGP_ATTR_MULTI_EXIT_DISC)) {
                if (from != bgp->peer_self && !transparent
                    && !CHECK_FLAG(peer->af_flags[afi][safi],
                                   PEER_FLAG_MED_UNCHANGED))
                        attr->flag &=
                                ~(ATTR_FLAG_BIT(BGP_ATTR_MULTI_EXIT_DISC));
        }

        /* Since the nexthop attribute can vary per peer, it is not explicitly
         * set
         * in announce check, only certain flags and length (or number of
         * nexthops
         * -- for IPv6/MP_REACH) are set here in order to guide the update
         * formation
         * code in setting the nexthop(s) on a per peer basis in
         * reformat_peer().
         * Typically, the source nexthop in the attribute is preserved but in
         * the
         * scenarios where we know it will always be overwritten, we reset the
         * nexthop to "0" in an attempt to achieve better Update packing. An
         * example of this is when a prefix from each of 2 IBGP peers needs to
         * be
         * announced to an EBGP peer (and they have the same attributes barring
         * their nexthop).
         */
        if (reflect)
                SET_FLAG(attr->rmap_change_flags, BATTR_REFLECTED);

#define NEXTHOP_IS_V6                                                          \
        ((safi != SAFI_ENCAP && safi != SAFI_MPLS_VPN                          \
          && (p->family == AF_INET6 || peer_cap_enhe(peer, afi, safi)))        \
         || ((safi == SAFI_ENCAP || safi == SAFI_MPLS_VPN)                     \
             && attr->mp_nexthop_len >= IPV6_MAX_BYTELEN))

        /* IPv6/MP starts with 1 nexthop. The link-local address is passed only
         * if
         * the peer (group) is configured to receive link-local nexthop
         * unchanged
         * and it is available in the prefix OR we're not reflecting the route
         * and
         * the peer (group) to whom we're going to announce is on a shared
         * network
         * and this is either a self-originated route or the peer is EBGP.
         */
        if (NEXTHOP_IS_V6) {
                attr->mp_nexthop_len = BGP_ATTR_NHLEN_IPV6_GLOBAL;
                if ((CHECK_FLAG(peer->af_flags[afi][safi],
                                PEER_FLAG_NEXTHOP_LOCAL_UNCHANGED)
                     && IN6_IS_ADDR_LINKLOCAL(&attr->mp_nexthop_local))
                    || (!reflect && peer->shared_network
                        && (from == bgp->peer_self
                            || peer->sort == BGP_PEER_EBGP))) {
                        attr->mp_nexthop_len =
                                BGP_ATTR_NHLEN_IPV6_GLOBAL_AND_LL;
                }

                /* Clear off link-local nexthop in source, whenever it is not
                 * needed to
                 * ensure more prefixes share the same attribute for
                 * announcement.
                 */
                if (!(CHECK_FLAG(peer->af_flags[afi][safi],
                                 PEER_FLAG_NEXTHOP_LOCAL_UNCHANGED)))
                        memset(&attr->mp_nexthop_local, 0, IPV6_MAX_BYTELEN);
        }

        bgp_peer_remove_private_as(bgp, afi, safi, peer, attr);
        bgp_peer_as_override(bgp, afi, safi, peer, attr);

        /* Route map & unsuppress-map apply. */
        if (ROUTE_MAP_OUT_NAME(filter) || (ri->extra && ri->extra->suppress)) {
                struct bgp_info info;
                struct bgp_info_extra dummy_info_extra;
                struct attr dummy_attr;

                info.peer = peer;
                info.attr = attr;

                if (ri->extra) {
                        memcpy(&dummy_info_extra, ri->extra,
                               sizeof(struct bgp_info_extra));
                        info.extra = &dummy_info_extra;
                }

                /* don't confuse inbound and outbound setting */
                RESET_FLAG(attr->rmap_change_flags);

                /*
                 * The route reflector is not allowed to modify the attributes
                 * of the reflected IBGP routes unless explicitly allowed.
                 */
                if ((from->sort == BGP_PEER_IBGP && peer->sort == BGP_PEER_IBGP)
                    && !bgp_flag_check(bgp,
                                       BGP_FLAG_RR_ALLOW_OUTBOUND_POLICY)) {
                        bgp_attr_dup(&dummy_attr, attr);
                        info.attr = &dummy_attr;
                }

                SET_FLAG(peer->rmap_type, PEER_RMAP_TYPE_OUT);

                if (ri->extra && ri->extra->suppress)
                        ret = route_map_apply(UNSUPPRESS_MAP(filter), p,
                                              RMAP_BGP, &info);
                else
                        ret = route_map_apply(ROUTE_MAP_OUT(filter), p,
                                              RMAP_BGP, &info);

                peer->rmap_type = 0;

                if (ret == RMAP_DENYMATCH) {
                        bgp_attr_flush(attr);
                        return 0;
                }
        }

        if (bgp_flag_check(bgp, BGP_FLAG_GRACEFUL_SHUTDOWN)) {
                if (peer->sort == BGP_PEER_IBGP
                    || peer->sort == BGP_PEER_CONFED) {
                        attr->flag |= ATTR_FLAG_BIT(BGP_ATTR_LOCAL_PREF);
                        attr->local_pref = BGP_GSHUT_LOCAL_PREF;
                } else {
                        bgp_attr_add_gshut_community(attr);
                }
        }

        /* After route-map has been applied, we check to see if the nexthop to
         * be carried in the attribute (that is used for the announcement) can
         * be cleared off or not. We do this in all cases where we would be
         * setting the nexthop to "ourselves". For IPv6, we only need to
         * consider
         * the global nexthop here; the link-local nexthop would have been
         * cleared
         * already, and if not, it is required by the update formation code.
         * Also see earlier comments in this function.
         */
        /*
         * If route-map has performed some operation on the nexthop or the peer
         * configuration says to pass it unchanged, we cannot reset the nexthop
         * here, so only attempt to do it if these aren't true. Note that the
         * route-map handler itself might have cleared the nexthop, if for
         * example,
         * it is configured as 'peer-address'.
         */
        if (!bgp_rmap_nhop_changed(attr->rmap_change_flags,
                                   riattr->rmap_change_flags)
            && !transparent
            && !CHECK_FLAG(peer->af_flags[afi][safi],
                           PEER_FLAG_NEXTHOP_UNCHANGED)) {
                /* We can reset the nexthop, if setting (or forcing) it to
                 * 'self' */
                if (CHECK_FLAG(peer->af_flags[afi][safi],
                               PEER_FLAG_NEXTHOP_SELF)
                    || CHECK_FLAG(peer->af_flags[afi][safi],
                                  PEER_FLAG_FORCE_NEXTHOP_SELF)) {
                        if (!reflect
                            || CHECK_FLAG(peer->af_flags[afi][safi],
                                          PEER_FLAG_FORCE_NEXTHOP_SELF))
                                subgroup_announce_reset_nhop(
                                        (peer_cap_enhe(peer, afi, safi)
                                                 ? AF_INET6
                                                 : p->family),
                                        attr);
                } else if (peer->sort == BGP_PEER_EBGP) {
                        /* Can also reset the nexthop if announcing to EBGP, but
                         * only if
                         * no peer in the subgroup is on a shared subnet.
                         * Note: 3rd party nexthop currently implemented for
                         * IPv4 only.
                         */
                        if (!bgp_subgrp_multiaccess_check_v4(riattr->nexthop,
                                                             subgrp))
                                subgroup_announce_reset_nhop(
                                        (peer_cap_enhe(peer, afi, safi)
                                                 ? AF_INET6
                                                 : p->family),
                                        attr);
                }
                /* If IPv6/MP and nexthop does not have any override and happens
                 * to
                 * be a link-local address, reset it so that we don't pass along
                 * the
                 * source's link-local IPv6 address to recipients who may not be
                 * on
                 * the same interface.
                 */
                if (p->family == AF_INET6 || peer_cap_enhe(peer, afi, safi)) {
                        if (IN6_IS_ADDR_LINKLOCAL(&attr->mp_nexthop_global))
                                subgroup_announce_reset_nhop(AF_INET6, attr);
                }
        }

        return 1;
}

void bgp_best_selection(struct bgp *bgp, struct bgp_node *rn,
                        struct bgp_maxpaths_cfg *mpath_cfg,
                        struct bgp_info_pair *result, afi_t afi, safi_t safi)
{
        struct bgp_info *new_select;
        struct bgp_info *old_select;
        struct bgp_info *ri;
        struct bgp_info *ri1;
        struct bgp_info *ri2;
        struct bgp_info *nextri = NULL;
        int paths_eq, do_mpath, debug;
        struct list mp_list;
        char pfx_buf[PREFIX2STR_BUFFER];
        char path_buf[PATH_ADDPATH_STR_BUFFER];

        bgp_mp_list_init(&mp_list);
        do_mpath =
                (mpath_cfg->maxpaths_ebgp > 1 || mpath_cfg->maxpaths_ibgp > 1);

        debug = bgp_debug_bestpath(&rn->p);

        if (debug)
                prefix2str(&rn->p, pfx_buf, sizeof(pfx_buf));

        /* bgp deterministic-med */
        new_select = NULL;
        if (bgp_flag_check(bgp, BGP_FLAG_DETERMINISTIC_MED)) {

                /* Clear BGP_INFO_DMED_SELECTED for all paths */
                for (ri1 = rn->info; ri1; ri1 = ri1->next)
                        bgp_info_unset_flag(rn, ri1, BGP_INFO_DMED_SELECTED);

                for (ri1 = rn->info; ri1; ri1 = ri1->next) {
                        if (CHECK_FLAG(ri1->flags, BGP_INFO_DMED_CHECK))
                                continue;
                        if (BGP_INFO_HOLDDOWN(ri1))
                                continue;
                        if (ri1->peer && ri1->peer != bgp->peer_self)
                                if (ri1->peer->status != Established)
                                        continue;

                        new_select = ri1;
                        if (ri1->next) {
                                for (ri2 = ri1->next; ri2; ri2 = ri2->next) {
                                        if (CHECK_FLAG(ri2->flags,
                                                       BGP_INFO_DMED_CHECK))
                                                continue;
                                        if (BGP_INFO_HOLDDOWN(ri2))
                                                continue;
                                        if (ri2->peer
                                            && ri2->peer != bgp->peer_self
                                            && !CHECK_FLAG(
                                                       ri2->peer->sflags,
                                                       PEER_STATUS_NSF_WAIT))
                                                if (ri2->peer->status
                                                    != Established)
                                                        continue;

                                        if (aspath_cmp_left(ri1->attr->aspath,
                                                            ri2->attr->aspath)
                                            || aspath_cmp_left_confed(
                                                       ri1->attr->aspath,
                                                       ri2->attr->aspath)) {
                                                if (bgp_info_cmp(bgp, ri2,
                                                                 new_select,
                                                                 &paths_eq,
                                                                 mpath_cfg,
                                                                 debug, pfx_buf,
                                                                 afi, safi)) {
                                                        bgp_info_unset_flag(
                                                                rn, new_select,
                                                                BGP_INFO_DMED_SELECTED);
                                                        new_select = ri2;
                                                }

                                                bgp_info_set_flag(
                                                        rn, ri2,
                                                        BGP_INFO_DMED_CHECK);
                                        }
                                }
                        }
                        bgp_info_set_flag(rn, new_select, BGP_INFO_DMED_CHECK);
                        bgp_info_set_flag(rn, new_select,
                                          BGP_INFO_DMED_SELECTED);

                        if (debug) {
                                bgp_info_path_with_addpath_rx_str(new_select,
                                                                  path_buf);
                                zlog_debug("%s: %s is the bestpath from AS %d",
                                           pfx_buf, path_buf,
                                           aspath_get_first_as(
                                                   new_select->attr->aspath));
                        }
                }
        }

        /* Check old selected route and new selected route. */
        old_select = NULL;
        new_select = NULL;
        for (ri = rn->info; (ri != NULL) && (nextri = ri->next, 1);
             ri = nextri) {
                if (CHECK_FLAG(ri->flags, BGP_INFO_SELECTED))
                        old_select = ri;

                if (BGP_INFO_HOLDDOWN(ri)) {
                        /* reap REMOVED routes, if needs be
                         * selected route must stay for a while longer though
                         */
                        if (CHECK_FLAG(ri->flags, BGP_INFO_REMOVED)
                            && (ri != old_select))
                                bgp_info_reap(rn, ri);

                        if (debug)
                                zlog_debug("%s: ri %p in holddown", __func__,
                                           ri);

                        continue;
                }

                if (ri->peer && ri->peer != bgp->peer_self
                    && !CHECK_FLAG(ri->peer->sflags, PEER_STATUS_NSF_WAIT))
                        if (ri->peer->status != Established) {

                                if (debug)
                                        zlog_debug(
                                                "%s: ri %p non self peer %s not estab state",
                                                __func__, ri, ri->peer->host);

                                continue;
                        }

                if (bgp_flag_check(bgp, BGP_FLAG_DETERMINISTIC_MED)
                    && (!CHECK_FLAG(ri->flags, BGP_INFO_DMED_SELECTED))) {
                        bgp_info_unset_flag(rn, ri, BGP_INFO_DMED_CHECK);
                        if (debug)
                                zlog_debug("%s: ri %p dmed", __func__, ri);
                        continue;
                }

                bgp_info_unset_flag(rn, ri, BGP_INFO_DMED_CHECK);

                if (bgp_info_cmp(bgp, ri, new_select, &paths_eq, mpath_cfg,
                                 debug, pfx_buf, afi, safi)) {
                        new_select = ri;
                }
        }

        /* Now that we know which path is the bestpath see if any of the other
         * paths
         * qualify as multipaths
         */
        if (debug) {
                if (new_select)
                        bgp_info_path_with_addpath_rx_str(new_select, path_buf);
                else
                        sprintf(path_buf, "NONE");
                zlog_debug(
                        "%s: After path selection, newbest is %s oldbest was %s",
                        pfx_buf, path_buf,
                        old_select ? old_select->peer->host : "NONE");
        }

        if (do_mpath && new_select) {
                for (ri = rn->info; (ri != NULL) && (nextri = ri->next, 1);
                     ri = nextri) {

                        if (debug)
                                bgp_info_path_with_addpath_rx_str(ri, path_buf);

                        if (ri == new_select) {
                                if (debug)
                                        zlog_debug(
                                                "%s: %s is the bestpath, add to the multipath list",
                                                pfx_buf, path_buf);
                                bgp_mp_list_add(&mp_list, ri);
                                continue;
                        }

                        if (BGP_INFO_HOLDDOWN(ri))
                                continue;

                        if (ri->peer && ri->peer != bgp->peer_self
                            && !CHECK_FLAG(ri->peer->sflags,
                                           PEER_STATUS_NSF_WAIT))
                                if (ri->peer->status != Established)
                                        continue;

                        if (!bgp_info_nexthop_cmp(ri, new_select)) {
                                if (debug)
                                        zlog_debug(
                                                "%s: %s has the same nexthop as the bestpath, skip it",
                                                pfx_buf, path_buf);
                                continue;
                        }

                        bgp_info_cmp(bgp, ri, new_select, &paths_eq, mpath_cfg,
                                     debug, pfx_buf, afi, safi);

                        if (paths_eq) {
                                if (debug)
                                        zlog_debug(
                                                "%s: %s is equivalent to the bestpath, add to the multipath list",
                                                pfx_buf, path_buf);
                                bgp_mp_list_add(&mp_list, ri);
                        }
                }
        }

        bgp_info_mpath_update(rn, new_select, old_select, &mp_list, mpath_cfg);
        bgp_info_mpath_aggregate_update(new_select, old_select);
        bgp_mp_list_clear(&mp_list);

        result->old = old_select;
        result->new = new_select;

        return;
}

/*
 * A new route/change in bestpath of an existing route. Evaluate the path
 * for advertisement to the subgroup.
 */
int subgroup_process_announce_selected(struct update_subgroup *subgrp,
                                       struct bgp_info *selected,
                                       struct bgp_node *rn,
                                       uint32_t addpath_tx_id)
{
        struct prefix *p;
        struct peer *onlypeer;
        struct attr attr;
        afi_t afi;
        safi_t safi;

        p = &rn->p;
        afi = SUBGRP_AFI(subgrp);
        safi = SUBGRP_SAFI(subgrp);
        onlypeer = ((SUBGRP_PCOUNT(subgrp) == 1) ? (SUBGRP_PFIRST(subgrp))->peer
                                                 : NULL);

        if (BGP_DEBUG(update, UPDATE_OUT)) {
                char buf_prefix[PREFIX_STRLEN];
                prefix2str(p, buf_prefix, sizeof(buf_prefix));
                zlog_debug("%s: p=%s, selected=%p", __func__, buf_prefix,
                           selected);
        }

        /* First update is deferred until ORF or ROUTE-REFRESH is received */
        if (onlypeer && CHECK_FLAG(onlypeer->af_sflags[afi][safi],
                                   PEER_STATUS_ORF_WAIT_REFRESH))
                return 0;

        memset(&attr, 0, sizeof(struct attr));
        /* It's initialized in bgp_announce_check() */

        /* Announcement to the subgroup.  If the route is filtered withdraw it.
         */
        if (selected) {
                if (subgroup_announce_check(rn, selected, subgrp, p, &attr))
                        bgp_adj_out_set_subgroup(rn, subgrp, &attr, selected);
                else
                        bgp_adj_out_unset_subgroup(rn, subgrp, 1,
                                                   selected->addpath_tx_id);
        }

        /* If selected is NULL we must withdraw the path using addpath_tx_id */
        else {
                bgp_adj_out_unset_subgroup(rn, subgrp, 1, addpath_tx_id);
        }

        return 0;
}

/*
 * Clear IGP changed flag and attribute changed flag for a route (all paths).
 * This is called at the end of route processing.
 */
void bgp_zebra_clear_route_change_flags(struct bgp_node *rn)
{
        struct bgp_info *ri;

        for (ri = rn->info; ri; ri = ri->next) {
                if (BGP_INFO_HOLDDOWN(ri))
                        continue;
                UNSET_FLAG(ri->flags, BGP_INFO_IGP_CHANGED);
                UNSET_FLAG(ri->flags, BGP_INFO_ATTR_CHANGED);
        }
}

/*
 * Has the route changed from the RIB's perspective? This is invoked only
 * if the route selection returns the same best route as earlier - to
 * determine if we need to update zebra or not.
 */
int bgp_zebra_has_route_changed(struct bgp_node *rn, struct bgp_info *selected)
{
        struct bgp_info *mpinfo;

        /* If this is multipath, check all selected paths for any nexthop change
         * or
         * attribute change. Some attribute changes (e.g., community) aren't of
         * relevance to the RIB, but we'll update zebra to ensure we handle the
         * case of BGP nexthop change. This is the behavior when the best path
         * has
         * an attribute change anyway.
         */
        if (CHECK_FLAG(selected->flags, BGP_INFO_IGP_CHANGED)
            || CHECK_FLAG(selected->flags, BGP_INFO_MULTIPATH_CHG))
                return 1;

        /* If this is multipath, check all selected paths for any nexthop change
         */
        for (mpinfo = bgp_info_mpath_first(selected); mpinfo;
             mpinfo = bgp_info_mpath_next(mpinfo)) {
                if (CHECK_FLAG(mpinfo->flags, BGP_INFO_IGP_CHANGED)
                    || CHECK_FLAG(mpinfo->flags, BGP_INFO_ATTR_CHANGED))
                        return 1;
        }

        /* Nothing has changed from the RIB's perspective. */
        return 0;
}

struct bgp_process_queue {
        struct bgp *bgp;
        STAILQ_HEAD(, bgp_node) pqueue;
#define BGP_PROCESS_QUEUE_EOIU_MARKER           (1 << 0)
        unsigned int flags;
        unsigned int queued;
};

/*
 * old_select = The old best path
 * new_select = the new best path
 *
 * if (!old_select && new_select)
 *     We are sending new information on.
 *
 * if (old_select && new_select) {
 *         if (new_select != old_select)
 *                 We have a new best path send a change
 *         else
 *                 We've received a update with new attributes that needs
 *                 to be passed on.
 * }
 *
 * if (old_select && !new_select)
 *     We have no eligible route that we can announce or the rn
 *     is being removed.
 */
static void bgp_process_main_one(struct bgp *bgp, struct bgp_node *rn,
                                 afi_t afi, safi_t safi)
{
        struct prefix *p = &rn->p;
        struct bgp_info *new_select;
        struct bgp_info *old_select;
        struct bgp_info_pair old_and_new;
        char pfx_buf[PREFIX2STR_BUFFER];
        int debug = 0;

        /* Is it end of initial update? (after startup) */
        if (!rn) {
                quagga_timestamp(3, bgp->update_delay_zebra_resume_time,
                                 sizeof(bgp->update_delay_zebra_resume_time));

                bgp->main_zebra_update_hold = 0;
                FOREACH_AFI_SAFI (afi, safi) {
                        if (bgp_fibupd_safi(safi))
                                bgp_zebra_announce_table(bgp, afi, safi);
                }
                bgp->main_peers_update_hold = 0;

                bgp_start_routeadv(bgp);
                return;
        }

        debug = bgp_debug_bestpath(&rn->p);
        if (debug) {
                prefix2str(&rn->p, pfx_buf, sizeof(pfx_buf));
                zlog_debug("%s: p=%s afi=%s, safi=%s start", __func__, pfx_buf,
                           afi2str(afi), safi2str(safi));
        }

        /* Best path selection. */
        bgp_best_selection(bgp, rn, &bgp->maxpaths[afi][safi], &old_and_new,
                           afi, safi);
        old_select = old_and_new.old;
        new_select = old_and_new.new;

        /* Do we need to allocate or free labels?
         * Right now, since we only deal with per-prefix labels, it is not
         * necessary to do this upon changes to best path except if the label
         * index changes
         */
        if (bgp->allocate_mpls_labels[afi][safi]) {
                if (new_select) {
                        if (!old_select
                            || bgp_label_index_differs(new_select, old_select)
                            || new_select->sub_type != old_select->sub_type) {
                                if (new_select->sub_type == BGP_ROUTE_STATIC
                                    && new_select->attr->flag
                                               & ATTR_FLAG_BIT(
                                                         BGP_ATTR_PREFIX_SID)
                                    && new_select->attr->label_index
                                               != BGP_INVALID_LABEL_INDEX) {
                                        if (CHECK_FLAG(
                                                    rn->flags,
                                                    BGP_NODE_REGISTERED_FOR_LABEL))
                                                bgp_unregister_for_label(rn);
                                        label_ntop(MPLS_LABEL_IMPLICIT_NULL, 1,
                                                   &rn->local_label);
                                        bgp_set_valid_label(&rn->local_label);
                                } else
                                        bgp_register_for_label(rn, new_select);
                        }
                } else if (CHECK_FLAG(rn->flags,
                                      BGP_NODE_REGISTERED_FOR_LABEL)) {
                        bgp_unregister_for_label(rn);
                }
        } else if (CHECK_FLAG(rn->flags, BGP_NODE_REGISTERED_FOR_LABEL)) {
                bgp_unregister_for_label(rn);
        }

        if (debug) {
                prefix2str(&rn->p, pfx_buf, sizeof(pfx_buf));
                zlog_debug(
                        "%s: p=%s afi=%s, safi=%s, old_select=%p, new_select=%p",
                        __func__, pfx_buf, afi2str(afi), safi2str(safi),
                        old_select, new_select);
        }

        /* If best route remains the same and this is not due to user-initiated
         * clear, see exactly what needs to be done.
         */

        if (old_select && old_select == new_select
            && !CHECK_FLAG(rn->flags, BGP_NODE_USER_CLEAR)
            && !CHECK_FLAG(old_select->flags, BGP_INFO_ATTR_CHANGED)
            && !bgp->addpath_tx_used[afi][safi]) {
                if (bgp_zebra_has_route_changed(rn, old_select)) {
#if ENABLE_BGP_VNC
                        vnc_import_bgp_add_route(bgp, p, old_select);
                        vnc_import_bgp_exterior_add_route(bgp, p, old_select);
#endif
                        if (bgp_fibupd_safi(safi)
                            && !bgp_option_check(BGP_OPT_NO_FIB)) {

                                if (new_select->type == ZEBRA_ROUTE_BGP
                                    && (new_select->sub_type == BGP_ROUTE_NORMAL
                                        || new_select->sub_type
                                                   == BGP_ROUTE_IMPORTED))

                                        bgp_zebra_announce(rn, p, old_select,
                                                           bgp, afi, safi);
                        }
                }
                UNSET_FLAG(old_select->flags, BGP_INFO_MULTIPATH_CHG);
                bgp_zebra_clear_route_change_flags(rn);

                /* If there is a change of interest to peers, reannounce the
                 * route. */
                if (CHECK_FLAG(old_select->flags, BGP_INFO_ATTR_CHANGED)
                    || CHECK_FLAG(rn->flags, BGP_NODE_LABEL_CHANGED)) {
                        group_announce_route(bgp, afi, safi, rn, new_select);

                        /* unicast routes must also be annouced to
                         * labeled-unicast update-groups */
                        if (safi == SAFI_UNICAST)
                                group_announce_route(bgp, afi,
                                                     SAFI_LABELED_UNICAST, rn,
                                                     new_select);

                        UNSET_FLAG(old_select->flags, BGP_INFO_ATTR_CHANGED);
                        UNSET_FLAG(rn->flags, BGP_NODE_LABEL_CHANGED);
                }

                UNSET_FLAG(rn->flags, BGP_NODE_PROCESS_SCHEDULED);
                return;
        }

        /* If the user did "clear ip bgp prefix x.x.x.x" this flag will be set
         */
        UNSET_FLAG(rn->flags, BGP_NODE_USER_CLEAR);

        /* bestpath has changed; bump version */
        if (old_select || new_select) {
                bgp_bump_version(rn);

                if (!bgp->t_rmap_def_originate_eval) {
                        bgp_lock(bgp);
                        thread_add_timer(
                                bm->master,
                                update_group_refresh_default_originate_route_map,
                                bgp, RMAP_DEFAULT_ORIGINATE_EVAL_TIMER,
                                &bgp->t_rmap_def_originate_eval);
                }
        }

        if (old_select)
                bgp_info_unset_flag(rn, old_select, BGP_INFO_SELECTED);
        if (new_select) {
                if (debug)
                        zlog_debug("%s: setting SELECTED flag", __func__);
                bgp_info_set_flag(rn, new_select, BGP_INFO_SELECTED);
                bgp_info_unset_flag(rn, new_select, BGP_INFO_ATTR_CHANGED);
                UNSET_FLAG(new_select->flags, BGP_INFO_MULTIPATH_CHG);
        }

#if ENABLE_BGP_VNC
        if ((afi == AFI_IP || afi == AFI_IP6) && (safi == SAFI_UNICAST)) {
                if (old_select != new_select) {
                        if (old_select) {
                                vnc_import_bgp_exterior_del_route(bgp, p,
                                                                  old_select);
                                vnc_import_bgp_del_route(bgp, p, old_select);
                        }
                        if (new_select) {
                                vnc_import_bgp_exterior_add_route(bgp, p,
                                                                  new_select);
                                vnc_import_bgp_add_route(bgp, p, new_select);
                        }
                }
        }
#endif

        group_announce_route(bgp, afi, safi, rn, new_select);

        /* unicast routes must also be annouced to labeled-unicast update-groups
         */
        if (safi == SAFI_UNICAST)
                group_announce_route(bgp, afi, SAFI_LABELED_UNICAST, rn,
                                     new_select);

        /* FIB update. */
        if (bgp_fibupd_safi(safi) && (bgp->inst_type != BGP_INSTANCE_TYPE_VIEW)
            && !bgp_option_check(BGP_OPT_NO_FIB)) {
                if (new_select && new_select->type == ZEBRA_ROUTE_BGP
                    && (new_select->sub_type == BGP_ROUTE_NORMAL
                        || new_select->sub_type == BGP_ROUTE_AGGREGATE
                        || new_select->sub_type == BGP_ROUTE_IMPORTED))

                        bgp_zebra_announce(rn, p, new_select, bgp, afi, safi);
                else {
                        /* Withdraw the route from the kernel. */
                        if (old_select && old_select->type == ZEBRA_ROUTE_BGP
                            && (old_select->sub_type == BGP_ROUTE_NORMAL
                                || old_select->sub_type == BGP_ROUTE_AGGREGATE
                                || old_select->sub_type == BGP_ROUTE_IMPORTED))

                                bgp_zebra_withdraw(p, old_select, bgp, safi);
                }
        }

        /* advertise/withdraw type-5 routes */
        if ((afi == AFI_IP || afi == AFI_IP6) && (safi == SAFI_UNICAST)) {
                if (advertise_type5_routes(bgp, afi) && new_select &&
                    (!new_select->extra || !new_select->extra->parent))
                        bgp_evpn_advertise_type5_route(bgp, &rn->p,
                                                       new_select->attr,
                                                       afi, safi);
                else if (advertise_type5_routes(bgp, afi) && old_select &&
                         (!old_select->extra || !old_select->extra->parent))
                        bgp_evpn_withdraw_type5_route(bgp, &rn->p, afi, safi);
        }

        /* Clear any route change flags. */
        bgp_zebra_clear_route_change_flags(rn);

        /* Reap old select bgp_info, if it has been removed */
        if (old_select && CHECK_FLAG(old_select->flags, BGP_INFO_REMOVED))
                bgp_info_reap(rn, old_select);

        UNSET_FLAG(rn->flags, BGP_NODE_PROCESS_SCHEDULED);
        return;
}

static wq_item_status bgp_process_wq(struct work_queue *wq, void *data)
{
        struct bgp_process_queue *pqnode = data;
        struct bgp *bgp = pqnode->bgp;
        struct bgp_table *table;
        struct bgp_node *rn;

        /* eoiu marker */
        if (CHECK_FLAG(pqnode->flags, BGP_PROCESS_QUEUE_EOIU_MARKER)) {
                bgp_process_main_one(bgp, NULL, 0, 0);
                /* should always have dedicated wq call */
                assert(STAILQ_FIRST(&pqnode->pqueue) == NULL);
                return WQ_SUCCESS;
        }

        while (!STAILQ_EMPTY(&pqnode->pqueue)) {
                rn = STAILQ_FIRST(&pqnode->pqueue);
                STAILQ_REMOVE_HEAD(&pqnode->pqueue, pq);
                STAILQ_NEXT(rn, pq) = NULL; /* complete unlink */
                table = bgp_node_table(rn);
                /* note, new RNs may be added as part of processing */
                bgp_process_main_one(bgp, rn, table->afi, table->safi);

                bgp_unlock_node(rn);
                bgp_table_unlock(table);
        }

        return WQ_SUCCESS;
}

static void bgp_processq_del(struct work_queue *wq, void *data)
{
        struct bgp_process_queue *pqnode = data;

        bgp_unlock(pqnode->bgp);

        XFREE(MTYPE_BGP_PROCESS_QUEUE, pqnode);
}

void bgp_process_queue_init(void)
{
        if (!bm->process_main_queue) {
                bm->process_main_queue =
                        work_queue_new(bm->master, "process_main_queue");

                if (!bm->process_main_queue) {
                        zlog_err("%s: Failed to allocate work queue", __func__);
                        exit(1);
                }
        }

        bm->process_main_queue->spec.workfunc = &bgp_process_wq;
        bm->process_main_queue->spec.del_item_data = &bgp_processq_del;
        bm->process_main_queue->spec.max_retries = 0;
        bm->process_main_queue->spec.hold = 50;
        /* Use a higher yield value of 50ms for main queue processing */
        bm->process_main_queue->spec.yield = 50 * 1000L;
}

static struct bgp_process_queue *bgp_processq_alloc(struct bgp *bgp)
{
        struct bgp_process_queue *pqnode;

        pqnode = XCALLOC(MTYPE_BGP_PROCESS_QUEUE,
                         sizeof(struct bgp_process_queue));

        /* unlocked in bgp_processq_del */
        pqnode->bgp = bgp_lock(bgp);
        STAILQ_INIT(&pqnode->pqueue);

        return pqnode;
}

void bgp_process(struct bgp *bgp, struct bgp_node *rn, afi_t afi, safi_t safi)
{
#define ARBITRARY_PROCESS_QLEN          10000
        struct work_queue *wq = bm->process_main_queue;
        struct bgp_process_queue *pqnode;
        int pqnode_reuse = 0;

        /* already scheduled for processing? */
        if (CHECK_FLAG(rn->flags, BGP_NODE_PROCESS_SCHEDULED))
                return;

        if (wq == NULL)
                return;

        /* Add route nodes to an existing work queue item until reaching the
           limit only if is from the same BGP view and it's not an EOIU marker
         */
        if (work_queue_item_count(wq)) {
                struct work_queue_item *item = work_queue_last_item(wq);
                pqnode = item->data;

                if (CHECK_FLAG(pqnode->flags, BGP_PROCESS_QUEUE_EOIU_MARKER)
                    || pqnode->bgp != bgp
                    || pqnode->queued >= ARBITRARY_PROCESS_QLEN)
                        pqnode = bgp_processq_alloc(bgp);
                else
                        pqnode_reuse = 1;
        } else
                pqnode = bgp_processq_alloc(bgp);
        /* all unlocked in bgp_process_wq */
        bgp_table_lock(bgp_node_table(rn));

        SET_FLAG(rn->flags, BGP_NODE_PROCESS_SCHEDULED);
        bgp_lock_node(rn);

        /* can't be enqueued twice */
        assert(STAILQ_NEXT(rn, pq) == NULL);
        STAILQ_INSERT_TAIL(&pqnode->pqueue, rn, pq);
        pqnode->queued++;

        if (!pqnode_reuse)
                work_queue_add(wq, pqnode);

        return;
}

void bgp_add_eoiu_mark(struct bgp *bgp)
{
        struct bgp_process_queue *pqnode;

        if (bm->process_main_queue == NULL)
                return;

        pqnode = bgp_processq_alloc(bgp);

        SET_FLAG(pqnode->flags, BGP_PROCESS_QUEUE_EOIU_MARKER);
        work_queue_add(bm->process_main_queue, pqnode);
}

static int bgp_maximum_prefix_restart_timer(struct thread *thread)
{
        struct peer *peer;

        peer = THREAD_ARG(thread);
        peer->t_pmax_restart = NULL;

        if (bgp_debug_neighbor_events(peer))
                zlog_debug(
                        "%s Maximum-prefix restart timer expired, restore peering",
                        peer->host);

        peer_clear(peer, NULL);

        return 0;
}

int bgp_maximum_prefix_overflow(struct peer *peer, afi_t afi, safi_t safi,
                                int always)
{
        iana_afi_t pkt_afi;
        iana_safi_t pkt_safi;

        if (!CHECK_FLAG(peer->af_flags[afi][safi], PEER_FLAG_MAX_PREFIX))
                return 0;

        if (peer->pcount[afi][safi] > peer->pmax[afi][safi]) {
                if (CHECK_FLAG(peer->af_sflags[afi][safi],
                               PEER_STATUS_PREFIX_LIMIT)
                    && !always)
                        return 0;

                zlog_info(
                        "%%MAXPFXEXCEED: No. of %s prefix received from %s %ld exceed, "
                        "limit %ld",
                        afi_safi_print(afi, safi), peer->host,
                        peer->pcount[afi][safi], peer->pmax[afi][safi]);
                SET_FLAG(peer->af_sflags[afi][safi], PEER_STATUS_PREFIX_LIMIT);

                if (CHECK_FLAG(peer->af_flags[afi][safi],
                               PEER_FLAG_MAX_PREFIX_WARNING))
                        return 0;

                /* Convert AFI, SAFI to values for packet. */
                pkt_afi = afi_int2iana(afi);
                pkt_safi = safi_int2iana(safi);
                {
                        uint8_t ndata[7];

                        ndata[0] = (pkt_afi >> 8);
                        ndata[1] = pkt_afi;
                        ndata[2] = pkt_safi;
                        ndata[3] = (peer->pmax[afi][safi] >> 24);
                        ndata[4] = (peer->pmax[afi][safi] >> 16);
                        ndata[5] = (peer->pmax[afi][safi] >> 8);
                        ndata[6] = (peer->pmax[afi][safi]);

                        SET_FLAG(peer->sflags, PEER_STATUS_PREFIX_OVERFLOW);
                        bgp_notify_send_with_data(peer, BGP_NOTIFY_CEASE,
                                                  BGP_NOTIFY_CEASE_MAX_PREFIX,
                                                  ndata, 7);
                }

                /* Dynamic peers will just close their connection. */
                if (peer_dynamic_neighbor(peer))
                        return 1;

                /* restart timer start */
                if (peer->pmax_restart[afi][safi]) {
                        peer->v_pmax_restart =
                                peer->pmax_restart[afi][safi] * 60;

                        if (bgp_debug_neighbor_events(peer))
                                zlog_debug(
                                        "%s Maximum-prefix restart timer started for %d secs",
                                        peer->host, peer->v_pmax_restart);

                        BGP_TIMER_ON(peer->t_pmax_restart,
                                     bgp_maximum_prefix_restart_timer,
                                     peer->v_pmax_restart);
                }

                return 1;
        } else
                UNSET_FLAG(peer->af_sflags[afi][safi],
                           PEER_STATUS_PREFIX_LIMIT);

        if (peer->pcount[afi][safi]
            > (peer->pmax[afi][safi] * peer->pmax_threshold[afi][safi] / 100)) {
                if (CHECK_FLAG(peer->af_sflags[afi][safi],
                               PEER_STATUS_PREFIX_THRESHOLD)
                    && !always)
                        return 0;

                zlog_info(
                        "%%MAXPFX: No. of %s prefix received from %s reaches %ld, max %ld",
                        afi_safi_print(afi, safi), peer->host,
                        peer->pcount[afi][safi], peer->pmax[afi][safi]);
                SET_FLAG(peer->af_sflags[afi][safi],
                         PEER_STATUS_PREFIX_THRESHOLD);
        } else
                UNSET_FLAG(peer->af_sflags[afi][safi],
                           PEER_STATUS_PREFIX_THRESHOLD);
        return 0;
}

/* Unconditionally remove the route from the RIB, without taking
 * damping into consideration (eg, because the session went down)
 */
void bgp_rib_remove(struct bgp_node *rn, struct bgp_info *ri, struct peer *peer,
                    afi_t afi, safi_t safi)
{
        bgp_aggregate_decrement(peer->bgp, &rn->p, ri, afi, safi);

        if (!CHECK_FLAG(ri->flags, BGP_INFO_HISTORY))
                bgp_info_delete(rn, ri); /* keep historical info */

        bgp_process(peer->bgp, rn, afi, safi);
}

static void bgp_rib_withdraw(struct bgp_node *rn, struct bgp_info *ri,
                             struct peer *peer, afi_t afi, safi_t safi,
                             struct prefix_rd *prd)
{
        int status = BGP_DAMP_NONE;

        /* apply dampening, if result is suppressed, we'll be retaining
         * the bgp_info in the RIB for historical reference.
         */
        if (CHECK_FLAG(peer->bgp->af_flags[afi][safi], BGP_CONFIG_DAMPENING)
            && peer->sort == BGP_PEER_EBGP)
                if ((status = bgp_damp_withdraw(ri, rn, afi, safi, 0))
                    == BGP_DAMP_SUPPRESSED) {
                        bgp_aggregate_decrement(peer->bgp, &rn->p, ri, afi,
                                                safi);
                        return;
                }

#if ENABLE_BGP_VNC
        if (safi == SAFI_MPLS_VPN) {
                struct bgp_node *prn = NULL;
                struct bgp_table *table = NULL;

                prn = bgp_node_get(peer->bgp->rib[afi][safi],
                                   (struct prefix *)prd);
                if (prn->info) {
                        table = (struct bgp_table *)(prn->info);

                        vnc_import_bgp_del_vnc_host_route_mode_resolve_nve(
                                peer->bgp, prd, table, &rn->p, ri);
                }
                bgp_unlock_node(prn);
        }
        if ((afi == AFI_IP || afi == AFI_IP6) && (safi == SAFI_UNICAST)) {
                if (CHECK_FLAG(ri->flags, BGP_INFO_SELECTED)) {

                        vnc_import_bgp_del_route(peer->bgp, &rn->p, ri);
                        vnc_import_bgp_exterior_del_route(peer->bgp, &rn->p,
                                                          ri);
                }
        }
#endif

        /* If this is an EVPN route, process for un-import. */
        if (safi == SAFI_EVPN)
                bgp_evpn_unimport_route(peer->bgp, afi, safi, &rn->p, ri);

        bgp_rib_remove(rn, ri, peer, afi, safi);
}

struct bgp_info *info_make(int type, int sub_type, unsigned short instance,
                           struct peer *peer, struct attr *attr,
                           struct bgp_node *rn)
{
        struct bgp_info *new;

        /* Make new BGP info. */
        new = XCALLOC(MTYPE_BGP_ROUTE, sizeof(struct bgp_info));
        new->type = type;
        new->instance = instance;
        new->sub_type = sub_type;
        new->peer = peer;
        new->attr = attr;
        new->uptime = bgp_clock();
        new->net = rn;
        new->addpath_tx_id = ++peer->bgp->addpath_tx_id;
        return new;
}

static void overlay_index_update(struct attr *attr,
                                 struct eth_segment_id *eth_s_id,
                                 union gw_addr *gw_ip)
{
        if (!attr)
                return;

        if (eth_s_id == NULL) {
                memset(&(attr->evpn_overlay.eth_s_id), 0,
                       sizeof(struct eth_segment_id));
        } else {
                memcpy(&(attr->evpn_overlay.eth_s_id), eth_s_id,
                       sizeof(struct eth_segment_id));
        }
        if (gw_ip == NULL) {
                memset(&(attr->evpn_overlay.gw_ip), 0, sizeof(union gw_addr));
        } else {
                memcpy(&(attr->evpn_overlay.gw_ip), gw_ip,
                       sizeof(union gw_addr));
        }
}

static bool overlay_index_equal(afi_t afi, struct bgp_info *info,
                                struct eth_segment_id *eth_s_id,
                                union gw_addr *gw_ip)
{
        struct eth_segment_id *info_eth_s_id, *info_eth_s_id_remote;
        union gw_addr *info_gw_ip, *info_gw_ip_remote;
        char temp[16];

        if (afi != AFI_L2VPN)
                return true;
        if (!info->attr) {
                memset(&temp, 0, 16);
                info_eth_s_id = (struct eth_segment_id *)&temp;
                info_gw_ip = (union gw_addr *)&temp;
                if (eth_s_id == NULL && gw_ip == NULL)
                        return true;
        } else {
                info_eth_s_id = &(info->attr->evpn_overlay.eth_s_id);
                info_gw_ip = &(info->attr->evpn_overlay.gw_ip);
        }
        if (gw_ip == NULL)
                info_gw_ip_remote = (union gw_addr *)&temp;
        else
                info_gw_ip_remote = gw_ip;
        if (eth_s_id == NULL)
                info_eth_s_id_remote = (struct eth_segment_id *)&temp;
        else
                info_eth_s_id_remote = eth_s_id;
        if (!memcmp(info_gw_ip, info_gw_ip_remote, sizeof(union gw_addr)))
                return false;
        return !memcmp(info_eth_s_id, info_eth_s_id_remote,
                       sizeof(struct eth_segment_id));
}

/* Check if received nexthop is valid or not. */
static int bgp_update_martian_nexthop(struct bgp *bgp, afi_t afi, safi_t safi,
                                      struct attr *attr)
{
        int ret = 0;

        /* Only validated for unicast and multicast currently. */
        /* Also valid for EVPN where the nexthop is an IP address. */
        if (safi != SAFI_UNICAST && safi != SAFI_MULTICAST && safi != SAFI_EVPN)
                return 0;

        /* If NEXT_HOP is present, validate it. */
        if (attr->flag & ATTR_FLAG_BIT(BGP_ATTR_NEXT_HOP)) {
                if (attr->nexthop.s_addr == 0
                    || IPV4_CLASS_DE(ntohl(attr->nexthop.s_addr))
                    || bgp_nexthop_self(bgp, attr->nexthop))
                        return 1;
        }

        /* If MP_NEXTHOP is present, validate it. */
        /* Note: For IPv6 nexthops, we only validate the global (1st) nexthop;
         * there is code in bgp_attr.c to ignore the link-local (2nd) nexthop if
         * it is not an IPv6 link-local address.
         */
        if (attr->mp_nexthop_len) {
                switch (attr->mp_nexthop_len) {
                case BGP_ATTR_NHLEN_IPV4:
                case BGP_ATTR_NHLEN_VPNV4:
                        ret = (attr->mp_nexthop_global_in.s_addr == 0
                               || IPV4_CLASS_DE(ntohl(
                                          attr->mp_nexthop_global_in.s_addr))
                               || bgp_nexthop_self(bgp,
                                                   attr->mp_nexthop_global_in));
                        break;

                case BGP_ATTR_NHLEN_IPV6_GLOBAL:
                case BGP_ATTR_NHLEN_IPV6_GLOBAL_AND_LL:
                case BGP_ATTR_NHLEN_VPNV6_GLOBAL:
                        ret = (IN6_IS_ADDR_UNSPECIFIED(&attr->mp_nexthop_global)
                               || IN6_IS_ADDR_LOOPBACK(&attr->mp_nexthop_global)
                               || IN6_IS_ADDR_MULTICAST(
                                          &attr->mp_nexthop_global));
                        break;

                default:
                        ret = 1;
                        break;
                }
        }

        return ret;
}

int bgp_update(struct peer *peer, struct prefix *p, uint32_t addpath_id,
               struct attr *attr, afi_t afi, safi_t safi, int type,
               int sub_type, struct prefix_rd *prd, mpls_label_t *label,
               uint32_t num_labels, int soft_reconfig,
               struct bgp_route_evpn *evpn)
{
        int ret;
        int aspath_loop_count = 0;
        struct bgp_node *rn;
        struct bgp *bgp;
        struct attr new_attr;
        struct attr *attr_new;
        struct bgp_info *ri;
        struct bgp_info *new;
        struct bgp_info_extra *extra;
        const char *reason;
        char pfx_buf[BGP_PRD_PATH_STRLEN];
        int connected = 0;
        int do_loop_check = 1;
        int has_valid_label = 0;
#if ENABLE_BGP_VNC
        int vnc_implicit_withdraw = 0;
#endif
        int same_attr = 0;

        memset(&new_attr, 0, sizeof(struct attr));
        new_attr.label_index = BGP_INVALID_LABEL_INDEX;
        new_attr.label = MPLS_INVALID_LABEL;

        bgp = peer->bgp;
        rn = bgp_afi_node_get(bgp->rib[afi][safi], afi, safi, p, prd);
        /* TODO: Check to see if we can get rid of "is_valid_label" */
        if (afi == AFI_L2VPN && safi == SAFI_EVPN)
                has_valid_label = (num_labels > 0) ? 1 : 0;
        else
                has_valid_label = bgp_is_valid_label(label);

        /* When peer's soft reconfiguration enabled.  Record input packet in
           Adj-RIBs-In.  */
        if (!soft_reconfig
            && CHECK_FLAG(peer->af_flags[afi][safi], PEER_FLAG_SOFT_RECONFIG)
            && peer != bgp->peer_self)
                bgp_adj_in_set(rn, peer, attr, addpath_id);

        /* Check previously received route. */
        for (ri = rn->info; ri; ri = ri->next)
                if (ri->peer == peer && ri->type == type
                    && ri->sub_type == sub_type
                    && ri->addpath_rx_id == addpath_id)
                        break;

        /* AS path local-as loop check. */
        if (peer->change_local_as) {
                if (peer->allowas_in[afi][safi])
                        aspath_loop_count = peer->allowas_in[afi][safi];
                else if (!CHECK_FLAG(peer->flags,
                                     PEER_FLAG_LOCAL_AS_NO_PREPEND))
                        aspath_loop_count = 1;

                if (aspath_loop_check(attr->aspath, peer->change_local_as)
                    > aspath_loop_count) {
                        reason = "as-path contains our own AS;";
                        goto filtered;
                }
        }

        /* If the peer is configured for "allowas-in origin" and the last ASN in
         * the
         * as-path is our ASN then we do not need to call aspath_loop_check
         */
        if (CHECK_FLAG(peer->af_flags[afi][safi], PEER_FLAG_ALLOWAS_IN_ORIGIN))
                if (aspath_get_last_as(attr->aspath) == bgp->as)
                        do_loop_check = 0;

        /* AS path loop check. */
        if (do_loop_check) {
                if (aspath_loop_check(attr->aspath, bgp->as)
                            > peer->allowas_in[afi][safi]
                    || (CHECK_FLAG(bgp->config, BGP_CONFIG_CONFEDERATION)
                        && aspath_loop_check(attr->aspath, bgp->confed_id)
                                   > peer->allowas_in[afi][safi])) {
                        reason = "as-path contains our own AS;";
                        goto filtered;
                }
        }

        /* Route reflector originator ID check.  */
        if (attr->flag & ATTR_FLAG_BIT(BGP_ATTR_ORIGINATOR_ID)
            && IPV4_ADDR_SAME(&bgp->router_id, &attr->originator_id)) {
                reason = "originator is us;";
                goto filtered;
        }

        /* Route reflector cluster ID check.  */
        if (bgp_cluster_filter(peer, attr)) {
                reason = "reflected from the same cluster;";
                goto filtered;
        }

        /* Apply incoming filter.  */
        if (bgp_input_filter(peer, p, attr, afi, safi) == FILTER_DENY) {
                reason = "filter;";
                goto filtered;
        }

        bgp_attr_dup(&new_attr, attr);

        /* Apply incoming route-map.
         * NB: new_attr may now contain newly allocated values from route-map
         * "set"
         * commands, so we need bgp_attr_flush in the error paths, until we
         * intern
         * the attr (which takes over the memory references) */
        if (bgp_input_modifier(peer, p, &new_attr, afi, safi, NULL)
            == RMAP_DENY) {
                reason = "route-map;";
                bgp_attr_flush(&new_attr);
                goto filtered;
        }

        if (peer->sort == BGP_PEER_EBGP) {

                /* If we receive the graceful-shutdown community from an eBGP
                 * peer we must lower local-preference */
                if (new_attr.community
                    && community_include(new_attr.community, COMMUNITY_GSHUT)) {
                        new_attr.flag |= ATTR_FLAG_BIT(BGP_ATTR_LOCAL_PREF);
                        new_attr.local_pref = BGP_GSHUT_LOCAL_PREF;

                        /* If graceful-shutdown is configured then add the GSHUT
                         * community to all paths received from eBGP peers */
                } else if (bgp_flag_check(peer->bgp,
                                          BGP_FLAG_GRACEFUL_SHUTDOWN)) {
                        bgp_attr_add_gshut_community(&new_attr);
                }
        }

        /* next hop check.  */
        if (!CHECK_FLAG(peer->flags, PEER_FLAG_IS_RFAPI_HD)
            && bgp_update_martian_nexthop(bgp, afi, safi, &new_attr)) {
                reason = "martian or self next-hop;";
                bgp_attr_flush(&new_attr);
                goto filtered;
        }

        attr_new = bgp_attr_intern(&new_attr);

        /* If the update is implicit withdraw. */
        if (ri) {
                ri->uptime = bgp_clock();
                same_attr = attrhash_cmp(ri->attr, attr_new);

                /* Same attribute comes in. */
                if (!CHECK_FLAG(ri->flags, BGP_INFO_REMOVED)
                    && attrhash_cmp(ri->attr, attr_new)
                    && (!has_valid_label
                        || memcmp(&(bgp_info_extra_get(ri))->label, label,
                                  num_labels * sizeof(mpls_label_t))
                                   == 0)
                    && (overlay_index_equal(
                               afi, ri, evpn == NULL ? NULL : &evpn->eth_s_id,
                               evpn == NULL ? NULL : &evpn->gw_ip))) {
                        if (CHECK_FLAG(bgp->af_flags[afi][safi],
                                       BGP_CONFIG_DAMPENING)
                            && peer->sort == BGP_PEER_EBGP
                            && CHECK_FLAG(ri->flags, BGP_INFO_HISTORY)) {
                                if (bgp_debug_update(peer, p, NULL, 1)) {
                                        bgp_debug_rdpfxpath2str(
                                                afi, safi, prd, p, label,
                                                num_labels, addpath_id ? 1 : 0,
                                                addpath_id, pfx_buf,
                                                sizeof(pfx_buf));
                                        zlog_debug("%s rcvd %s", peer->host,
                                                   pfx_buf);
                                }

                                if (bgp_damp_update(ri, rn, afi, safi)
                                    != BGP_DAMP_SUPPRESSED) {
                                        bgp_aggregate_increment(bgp, p, ri, afi,
                                                                safi);
                                        bgp_process(bgp, rn, afi, safi);
                                }
                        } else /* Duplicate - odd */
                        {
                                if (bgp_debug_update(peer, p, NULL, 1)) {
                                        if (!peer->rcvd_attr_printed) {
                                                zlog_debug(
                                                        "%s rcvd UPDATE w/ attr: %s",
                                                        peer->host,
                                                        peer->rcvd_attr_str);
                                                peer->rcvd_attr_printed = 1;
                                        }

                                        bgp_debug_rdpfxpath2str(
                                                afi, safi, prd, p, label,
                                                num_labels, addpath_id ? 1 : 0,
                                                addpath_id, pfx_buf,
                                                sizeof(pfx_buf));
                                        zlog_debug(
                                                "%s rcvd %s...duplicate ignored",
                                                peer->host, pfx_buf);
                                }

                                /* graceful restart STALE flag unset. */
                                if (CHECK_FLAG(ri->flags, BGP_INFO_STALE)) {
                                        bgp_info_unset_flag(rn, ri,
                                                            BGP_INFO_STALE);
                                        bgp_process(bgp, rn, afi, safi);
                                }
                        }

                        bgp_unlock_node(rn);
                        bgp_attr_unintern(&attr_new);

                        return 0;
                }

                /* Withdraw/Announce before we fully processed the withdraw */
                if (CHECK_FLAG(ri->flags, BGP_INFO_REMOVED)) {
                        if (bgp_debug_update(peer, p, NULL, 1)) {
                                bgp_debug_rdpfxpath2str(
                                        afi, safi, prd, p, label, num_labels,
                                        addpath_id ? 1 : 0, addpath_id, pfx_buf,
                                        sizeof(pfx_buf));
                                zlog_debug(
                                        "%s rcvd %s, flapped quicker than processing",
                                        peer->host, pfx_buf);
                        }

                        bgp_info_restore(rn, ri);
                }

                /* Received Logging. */
                if (bgp_debug_update(peer, p, NULL, 1)) {
                        bgp_debug_rdpfxpath2str(afi, safi, prd, p, label,
                                                num_labels, addpath_id ? 1 : 0,
                                                addpath_id, pfx_buf,
                                                sizeof(pfx_buf));
                        zlog_debug("%s rcvd %s", peer->host, pfx_buf);
                }

                /* graceful restart STALE flag unset. */
                if (CHECK_FLAG(ri->flags, BGP_INFO_STALE))
                        bgp_info_unset_flag(rn, ri, BGP_INFO_STALE);

                /* The attribute is changed. */
                bgp_info_set_flag(rn, ri, BGP_INFO_ATTR_CHANGED);

                /* implicit withdraw, decrement aggregate and pcount here.
                 * only if update is accepted, they'll increment below.
                 */
                bgp_aggregate_decrement(bgp, p, ri, afi, safi);

                /* Update bgp route dampening information.  */
                if (CHECK_FLAG(bgp->af_flags[afi][safi], BGP_CONFIG_DAMPENING)
                    && peer->sort == BGP_PEER_EBGP) {
                        /* This is implicit withdraw so we should update
                           dampening
                           information.  */
                        if (!CHECK_FLAG(ri->flags, BGP_INFO_HISTORY))
                                bgp_damp_withdraw(ri, rn, afi, safi, 1);
                }
#if ENABLE_BGP_VNC
                if (safi == SAFI_MPLS_VPN) {
                        struct bgp_node *prn = NULL;
                        struct bgp_table *table = NULL;

                        prn = bgp_node_get(bgp->rib[afi][safi],
                                           (struct prefix *)prd);
                        if (prn->info) {
                                table = (struct bgp_table *)(prn->info);

                                vnc_import_bgp_del_vnc_host_route_mode_resolve_nve(
                                        bgp, prd, table, p, ri);
                        }
                        bgp_unlock_node(prn);
                }
                if ((afi == AFI_IP || afi == AFI_IP6)
                    && (safi == SAFI_UNICAST)) {
                        if (CHECK_FLAG(ri->flags, BGP_INFO_SELECTED)) {
                                /*
                                 * Implicit withdraw case.
                                 */
                                ++vnc_implicit_withdraw;
                                vnc_import_bgp_del_route(bgp, p, ri);
                                vnc_import_bgp_exterior_del_route(bgp, p, ri);
                        }
                }
#endif

                /* Special handling for EVPN update of an existing route. If the
                 * extended community attribute has changed, we need to
                 * un-import
                 * the route using its existing extended community. It will be
                 * subsequently processed for import with the new extended
                 * community.
                 */
                if (safi == SAFI_EVPN && !same_attr) {
                        if ((ri->attr->flag
                             & ATTR_FLAG_BIT(BGP_ATTR_EXT_COMMUNITIES))
                            && (attr_new->flag
                                & ATTR_FLAG_BIT(BGP_ATTR_EXT_COMMUNITIES))) {
                                int cmp;

                                cmp = ecommunity_cmp(ri->attr->ecommunity,
                                                     attr_new->ecommunity);
                                if (!cmp) {
                                        if (bgp_debug_update(peer, p, NULL, 1))
                                                zlog_debug(
                                                        "Change in EXT-COMM, existing %s new %s",
                                                        ecommunity_str(
                                                                ri->attr->ecommunity),
                                                        ecommunity_str(
                                                                attr_new->ecommunity));
                                        bgp_evpn_unimport_route(bgp, afi, safi,
                                                                p, ri);
                                }
                        }
                }

                /* Update to new attribute.  */
                bgp_attr_unintern(&ri->attr);
                ri->attr = attr_new;

                /* Update MPLS label */
                if (has_valid_label) {
                        extra = bgp_info_extra_get(ri);
                        memcpy(&extra->label, label,
                               num_labels * sizeof(mpls_label_t));
                        extra->num_labels = num_labels;
                        if (!(afi == AFI_L2VPN && safi == SAFI_EVPN))
                                bgp_set_valid_label(&extra->label[0]);
                }

#if ENABLE_BGP_VNC
                if ((afi == AFI_IP || afi == AFI_IP6)
                    && (safi == SAFI_UNICAST)) {
                        if (vnc_implicit_withdraw) {
                                /*
                                 * Add back the route with its new attributes
                                 * (e.g., nexthop).
                                 * The route is still selected, until the route
                                 * selection
                                 * queued by bgp_process actually runs. We have
                                 * to make this
                                 * update to the VNC side immediately to avoid
                                 * racing against
                                 * configuration changes (e.g., route-map
                                 * changes) which
                                 * trigger re-importation of the entire RIB.
                                 */
                                vnc_import_bgp_add_route(bgp, p, ri);
                                vnc_import_bgp_exterior_add_route(bgp, p, ri);
                        }
                }
#endif
                /* Update Overlay Index */
                if (afi == AFI_L2VPN) {
                        overlay_index_update(
                                ri->attr, evpn == NULL ? NULL : &evpn->eth_s_id,
                                evpn == NULL ? NULL : &evpn->gw_ip);
                }

                /* Update bgp route dampening information.  */
                if (CHECK_FLAG(bgp->af_flags[afi][safi], BGP_CONFIG_DAMPENING)
                    && peer->sort == BGP_PEER_EBGP) {
                        /* Now we do normal update dampening.  */
                        ret = bgp_damp_update(ri, rn, afi, safi);
                        if (ret == BGP_DAMP_SUPPRESSED) {
                                bgp_unlock_node(rn);
                                return 0;
                        }
                }

                /* Nexthop reachability check - for unicast and
                 * labeled-unicast.. */
                if ((afi == AFI_IP || afi == AFI_IP6)
                    && (safi == SAFI_UNICAST || safi == SAFI_LABELED_UNICAST)) {
                        if (peer->sort == BGP_PEER_EBGP && peer->ttl == 1
                            && !CHECK_FLAG(peer->flags,
                                           PEER_FLAG_DISABLE_CONNECTED_CHECK)
                            && !bgp_flag_check(
                                       bgp, BGP_FLAG_DISABLE_NH_CONNECTED_CHK))
                                connected = 1;
                        else
                                connected = 0;

                        if (bgp_find_or_add_nexthop(bgp, afi, ri, NULL,
                                                    connected)
                            || CHECK_FLAG(peer->flags, PEER_FLAG_IS_RFAPI_HD))
                                bgp_info_set_flag(rn, ri, BGP_INFO_VALID);
                        else {
                                if (BGP_DEBUG(nht, NHT)) {
                                        char buf1[INET6_ADDRSTRLEN];
                                        inet_ntop(AF_INET,
                                                  (const void *)&attr_new
                                                          ->nexthop,
                                                  buf1, INET6_ADDRSTRLEN);
                                        zlog_debug("%s(%s): NH unresolved",
                                                   __FUNCTION__, buf1);
                                }
                                bgp_info_unset_flag(rn, ri, BGP_INFO_VALID);
                        }
                } else
                        bgp_info_set_flag(rn, ri, BGP_INFO_VALID);

#if ENABLE_BGP_VNC
                if (safi == SAFI_MPLS_VPN) {
                        struct bgp_node *prn = NULL;
                        struct bgp_table *table = NULL;

                        prn = bgp_node_get(bgp->rib[afi][safi],
                                           (struct prefix *)prd);
                        if (prn->info) {
                                table = (struct bgp_table *)(prn->info);

                                vnc_import_bgp_add_vnc_host_route_mode_resolve_nve(
                                        bgp, prd, table, p, ri);
                        }
                        bgp_unlock_node(prn);
                }
#endif

                /* If this is an EVPN route and some attribute has changed,
                 * process
                 * route for import. If the extended community has changed, we
                 * would
                 * have done the un-import earlier and the import would result
                 * in the
                 * route getting injected into appropriate L2 VNIs. If it is
                 * just
                 * some other attribute change, the import will result in
                 * updating
                 * the attributes for the route in the VNI(s).
                 */
                if (safi == SAFI_EVPN && !same_attr)
                        bgp_evpn_import_route(bgp, afi, safi, p, ri);

                /* Process change. */
                bgp_aggregate_increment(bgp, p, ri, afi, safi);

                bgp_process(bgp, rn, afi, safi);
                bgp_unlock_node(rn);

                if (SAFI_UNICAST == safi
                    && (bgp->inst_type == BGP_INSTANCE_TYPE_VRF
                        || bgp->inst_type == BGP_INSTANCE_TYPE_DEFAULT)) {

                        vpn_leak_from_vrf_update(bgp_get_default(), bgp, ri);
                }
                if ((SAFI_MPLS_VPN == safi)
                    && (bgp->inst_type == BGP_INSTANCE_TYPE_DEFAULT)) {

                        vpn_leak_to_vrf_update(bgp, ri);
                }

#if ENABLE_BGP_VNC
                if (SAFI_MPLS_VPN == safi) {
                        mpls_label_t label_decoded = decode_label(label);

                        rfapiProcessUpdate(peer, NULL, p, prd, attr, afi, safi,
                                           type, sub_type, &label_decoded);
                }
                if (SAFI_ENCAP == safi) {
                        rfapiProcessUpdate(peer, NULL, p, prd, attr, afi, safi,
                                           type, sub_type, NULL);
                }
#endif

                return 0;
        } // End of implicit withdraw

        /* Received Logging. */
        if (bgp_debug_update(peer, p, NULL, 1)) {
                if (!peer->rcvd_attr_printed) {
                        zlog_debug("%s rcvd UPDATE w/ attr: %s", peer->host,
                                   peer->rcvd_attr_str);
                        peer->rcvd_attr_printed = 1;
                }

                bgp_debug_rdpfxpath2str(afi, safi, prd, p, label, num_labels,
                                        addpath_id ? 1 : 0, addpath_id, pfx_buf,
                                        sizeof(pfx_buf));
                zlog_debug("%s rcvd %s", peer->host, pfx_buf);
        }

        /* Make new BGP info. */
        new = info_make(type, sub_type, 0, peer, attr_new, rn);

        /* Update MPLS label */
        if (has_valid_label) {
                extra = bgp_info_extra_get(new);
                memcpy(&extra->label, label, num_labels * sizeof(mpls_label_t));
                extra->num_labels = num_labels;
                if (!(afi == AFI_L2VPN && safi == SAFI_EVPN))
                        bgp_set_valid_label(&extra->label[0]);
        }

        /* Update Overlay Index */
        if (afi == AFI_L2VPN) {
                overlay_index_update(new->attr,
                                     evpn == NULL ? NULL : &evpn->eth_s_id,
                                     evpn == NULL ? NULL : &evpn->gw_ip);
        }
        /* Nexthop reachability check. */
        if ((afi == AFI_IP || afi == AFI_IP6)
            && (safi == SAFI_UNICAST || safi == SAFI_LABELED_UNICAST)) {
                if (peer->sort == BGP_PEER_EBGP && peer->ttl == 1
                    && !CHECK_FLAG(peer->flags,
                                   PEER_FLAG_DISABLE_CONNECTED_CHECK)
                    && !bgp_flag_check(bgp, BGP_FLAG_DISABLE_NH_CONNECTED_CHK))
                        connected = 1;
                else
                        connected = 0;

                if (bgp_find_or_add_nexthop(bgp, afi, new, NULL, connected)
                    || CHECK_FLAG(peer->flags, PEER_FLAG_IS_RFAPI_HD))
                        bgp_info_set_flag(rn, new, BGP_INFO_VALID);
                else {
                        if (BGP_DEBUG(nht, NHT)) {
                                char buf1[INET6_ADDRSTRLEN];
                                inet_ntop(AF_INET,
                                          (const void *)&attr_new->nexthop,
                                          buf1, INET6_ADDRSTRLEN);
                                zlog_debug("%s(%s): NH unresolved",
                                           __FUNCTION__, buf1);
                        }
                        bgp_info_unset_flag(rn, new, BGP_INFO_VALID);
                }
        } else
                bgp_info_set_flag(rn, new, BGP_INFO_VALID);

        /* Addpath ID */
        new->addpath_rx_id = addpath_id;

        /* Increment prefix */
        bgp_aggregate_increment(bgp, p, new, afi, safi);

        /* Register new BGP information. */
        bgp_info_add(rn, new);

        /* route_node_get lock */
        bgp_unlock_node(rn);

#if ENABLE_BGP_VNC
        if (safi == SAFI_MPLS_VPN) {
                struct bgp_node *prn = NULL;
                struct bgp_table *table = NULL;

                prn = bgp_node_get(bgp->rib[afi][safi], (struct prefix *)prd);
                if (prn->info) {
                        table = (struct bgp_table *)(prn->info);

                        vnc_import_bgp_add_vnc_host_route_mode_resolve_nve(
                                bgp, prd, table, p, new);
                }
                bgp_unlock_node(prn);
        }
#endif

        /* If maximum prefix count is configured and current prefix
           count exeed it. */
        if (bgp_maximum_prefix_overflow(peer, afi, safi, 0))
                return -1;

        /* If this is an EVPN route, process for import. */
        if (safi == SAFI_EVPN)
                bgp_evpn_import_route(bgp, afi, safi, p, new);

        /* Process change. */
        bgp_process(bgp, rn, afi, safi);

        if (SAFI_UNICAST == safi
            && (bgp->inst_type == BGP_INSTANCE_TYPE_VRF
                || bgp->inst_type == BGP_INSTANCE_TYPE_DEFAULT)) {
                vpn_leak_from_vrf_update(bgp_get_default(), bgp, new);
        }
        if ((SAFI_MPLS_VPN == safi)
            && (bgp->inst_type == BGP_INSTANCE_TYPE_DEFAULT)) {

                vpn_leak_to_vrf_update(bgp, new);
        }
#if ENABLE_BGP_VNC
        if (SAFI_MPLS_VPN == safi) {
                mpls_label_t label_decoded = decode_label(label);

                rfapiProcessUpdate(peer, NULL, p, prd, attr, afi, safi, type,
                                   sub_type, &label_decoded);
        }
        if (SAFI_ENCAP == safi) {
                rfapiProcessUpdate(peer, NULL, p, prd, attr, afi, safi, type,
                                   sub_type, NULL);
        }
#endif

        return 0;

/* This BGP update is filtered.  Log the reason then update BGP
   entry.  */
filtered:
        if (bgp_debug_update(peer, p, NULL, 1)) {
                if (!peer->rcvd_attr_printed) {
                        zlog_debug("%s rcvd UPDATE w/ attr: %s", peer->host,
                                   peer->rcvd_attr_str);
                        peer->rcvd_attr_printed = 1;
                }

                bgp_debug_rdpfxpath2str(afi, safi, prd, p, label, num_labels,
                                        addpath_id ? 1 : 0, addpath_id, pfx_buf,
                                        sizeof(pfx_buf));
                zlog_debug("%s rcvd UPDATE about %s -- DENIED due to: %s",
                           peer->host, pfx_buf, reason);
        }

        if (ri) {
                /* If this is an EVPN route, un-import it as it is now filtered.
                 */
                if (safi == SAFI_EVPN)
                        bgp_evpn_unimport_route(bgp, afi, safi, p, ri);

                if (SAFI_UNICAST == safi
                    && (bgp->inst_type == BGP_INSTANCE_TYPE_VRF
                        || bgp->inst_type == BGP_INSTANCE_TYPE_DEFAULT)) {

                        vpn_leak_from_vrf_withdraw(bgp_get_default(), bgp, ri);
                }
                if ((SAFI_MPLS_VPN == safi)
                    && (bgp->inst_type == BGP_INSTANCE_TYPE_DEFAULT)) {

                        vpn_leak_to_vrf_withdraw(bgp, ri);
                }

                bgp_rib_remove(rn, ri, peer, afi, safi);
        }

        bgp_unlock_node(rn);

#if ENABLE_BGP_VNC
        /*
         * Filtered update is treated as an implicit withdrawal (see
         * bgp_rib_remove()
         * a few lines above)
         */
        if ((SAFI_MPLS_VPN == safi) || (SAFI_ENCAP == safi)) {
                rfapiProcessWithdraw(peer, NULL, p, prd, NULL, afi, safi, type,
                                     0);
        }
#endif

        return 0;
}

int bgp_withdraw(struct peer *peer, struct prefix *p, uint32_t addpath_id,
                 struct attr *attr, afi_t afi, safi_t safi, int type,
                 int sub_type, struct prefix_rd *prd, mpls_label_t *label,
                 uint32_t num_labels, struct bgp_route_evpn *evpn)
{
        struct bgp *bgp;
        char pfx_buf[BGP_PRD_PATH_STRLEN];
        struct bgp_node *rn;
        struct bgp_info *ri;

#if ENABLE_BGP_VNC
        if ((SAFI_MPLS_VPN == safi) || (SAFI_ENCAP == safi)) {
                rfapiProcessWithdraw(peer, NULL, p, prd, NULL, afi, safi, type,
                                     0);
        }
#endif

        bgp = peer->bgp;

        /* Lookup node. */
        rn = bgp_afi_node_get(bgp->rib[afi][safi], afi, safi, p, prd);

        /* If peer is soft reconfiguration enabled.  Record input packet for
         * further calculation.
         *
         * Cisco IOS 12.4(24)T4 on session establishment sends withdraws for all
         * routes that are filtered.  This tanks out Quagga RS pretty badly due
         * to
         * the iteration over all RS clients.
         * Since we need to remove the entry from adj_in anyway, do that first
         * and
         * if there was no entry, we don't need to do anything more.
         */
        if (CHECK_FLAG(peer->af_flags[afi][safi], PEER_FLAG_SOFT_RECONFIG)
            && peer != bgp->peer_self)
                if (!bgp_adj_in_unset(rn, peer, addpath_id)) {
                        if (bgp_debug_update(peer, p, NULL, 1)) {
                                bgp_debug_rdpfxpath2str(
                                        afi, safi, prd, p, label, num_labels,
                                        addpath_id ? 1 : 0, addpath_id, pfx_buf,
                                        sizeof(pfx_buf));
                                zlog_debug(
                                        "%s withdrawing route %s not in adj-in",
                                        peer->host, pfx_buf);
                        }
                        bgp_unlock_node(rn);
                        return 0;
                }

        /* Lookup withdrawn route. */
        for (ri = rn->info; ri; ri = ri->next)
                if (ri->peer == peer && ri->type == type
                    && ri->sub_type == sub_type
                    && ri->addpath_rx_id == addpath_id)
                        break;

        /* Logging. */
        if (bgp_debug_update(peer, p, NULL, 1)) {
                bgp_debug_rdpfxpath2str(afi, safi, prd, p, label, num_labels,
                                        addpath_id ? 1 : 0, addpath_id, pfx_buf,
                                        sizeof(pfx_buf));
                zlog_debug("%s rcvd UPDATE about %s -- withdrawn", peer->host,
                           pfx_buf);
        }

        /* Withdraw specified route from routing table. */
        if (ri && !CHECK_FLAG(ri->flags, BGP_INFO_HISTORY)) {
                bgp_rib_withdraw(rn, ri, peer, afi, safi, prd);
                if (SAFI_UNICAST == safi
                    && (bgp->inst_type == BGP_INSTANCE_TYPE_VRF
                        || bgp->inst_type == BGP_INSTANCE_TYPE_DEFAULT)) {
                        vpn_leak_from_vrf_withdraw(bgp_get_default(), bgp, ri);
                }
                if ((SAFI_MPLS_VPN == safi)
                    && (bgp->inst_type == BGP_INSTANCE_TYPE_DEFAULT)) {

                        vpn_leak_to_vrf_withdraw(bgp, ri);
                }
        } else if (bgp_debug_update(peer, p, NULL, 1)) {
                bgp_debug_rdpfxpath2str(afi, safi, prd, p, label, num_labels,
                                        addpath_id ? 1 : 0, addpath_id, pfx_buf,
                                        sizeof(pfx_buf));
                zlog_debug("%s Can't find the route %s", peer->host, pfx_buf);
        }

        /* Unlock bgp_node_get() lock. */
        bgp_unlock_node(rn);

        return 0;
}

void bgp_default_originate(struct peer *peer, afi_t afi, safi_t safi,
                           int withdraw)
{
        struct update_subgroup *subgrp;
        subgrp = peer_subgroup(peer, afi, safi);
        subgroup_default_originate(subgrp, withdraw);
}


/*
 * bgp_stop_announce_route_timer
 */
void bgp_stop_announce_route_timer(struct peer_af *paf)
{
        if (!paf->t_announce_route)
                return;

        THREAD_TIMER_OFF(paf->t_announce_route);
}

/*
 * bgp_announce_route_timer_expired
 *
 * Callback that is invoked when the route announcement timer for a
 * peer_af expires.
 */
static int bgp_announce_route_timer_expired(struct thread *t)
{
        struct peer_af *paf;
        struct peer *peer;

        paf = THREAD_ARG(t);
        peer = paf->peer;

        if (peer->status != Established)
                return 0;

        if (!peer->afc_nego[paf->afi][paf->safi])
                return 0;

        peer_af_announce_route(paf, 1);
        return 0;
}

/*
 * bgp_announce_route
 *
 * *Triggers* announcement of routes of a given AFI/SAFI to a peer.
 */
void bgp_announce_route(struct peer *peer, afi_t afi, safi_t safi)
{
        struct peer_af *paf;
        struct update_subgroup *subgrp;

        paf = peer_af_find(peer, afi, safi);
        if (!paf)
                return;
        subgrp = PAF_SUBGRP(paf);

        /*
         * Ignore if subgroup doesn't exist (implies AF is not negotiated)
         * or a refresh has already been triggered.
         */
        if (!subgrp || paf->t_announce_route)
                return;

        /*
         * Start a timer to stagger/delay the announce. This serves
         * two purposes - announcement can potentially be combined for
         * multiple peers and the announcement doesn't happen in the
         * vty context.
         */
        thread_add_timer_msec(bm->master, bgp_announce_route_timer_expired, paf,
                              (subgrp->peer_count == 1)
                                      ? BGP_ANNOUNCE_ROUTE_SHORT_DELAY_MS
                                      : BGP_ANNOUNCE_ROUTE_DELAY_MS,
                              &paf->t_announce_route);
}

/*
 * Announce routes from all AF tables to a peer.
 *
 * This should ONLY be called when there is a need to refresh the
 * routes to the peer based on a policy change for this peer alone
 * or a route refresh request received from the peer.
 * The operation will result in splitting the peer from its existing
 * subgroups and putting it in new subgroups.
 */
void bgp_announce_route_all(struct peer *peer)
{
        afi_t afi;
        safi_t safi;

        FOREACH_AFI_SAFI (afi, safi)
                bgp_announce_route(peer, afi, safi);
}

static void bgp_soft_reconfig_table(struct peer *peer, afi_t afi, safi_t safi,
                                    struct bgp_table *table,
                                    struct prefix_rd *prd)
{
        int ret;
        struct bgp_node *rn;
        struct bgp_adj_in *ain;

        if (!table)
                table = peer->bgp->rib[afi][safi];

        for (rn = bgp_table_top(table); rn; rn = bgp_route_next(rn))
                for (ain = rn->adj_in; ain; ain = ain->next) {
                        if (ain->peer != peer)
                                continue;

                        struct bgp_info *ri = rn->info;
                        uint32_t num_labels = 0;
                        mpls_label_t *label_pnt = NULL;

                        if (ri && ri->extra)
                                num_labels = ri->extra->num_labels;
                        if (num_labels)
                                label_pnt = &ri->extra->label[0];

                        ret = bgp_update(peer, &rn->p, ain->addpath_rx_id,
                                         ain->attr, afi, safi, ZEBRA_ROUTE_BGP,
                                         BGP_ROUTE_NORMAL, prd, label_pnt,
                                         num_labels, 1, NULL);

                        if (ret < 0) {
                                bgp_unlock_node(rn);
                                return;
                        }
                }
}

void bgp_soft_reconfig_in(struct peer *peer, afi_t afi, safi_t safi)
{
        struct bgp_node *rn;
        struct bgp_table *table;

        if (peer->status != Established)
                return;

        if ((safi != SAFI_MPLS_VPN) && (safi != SAFI_ENCAP)
            && (safi != SAFI_EVPN))
                bgp_soft_reconfig_table(peer, afi, safi, NULL, NULL);
        else
                for (rn = bgp_table_top(peer->bgp->rib[afi][safi]); rn;
                     rn = bgp_route_next(rn))
                        if ((table = rn->info) != NULL) {
                                struct prefix_rd prd;
                                prd.family = AF_UNSPEC;
                                prd.prefixlen = 64;
                                memcpy(&prd.val, rn->p.u.val, 8);

                                bgp_soft_reconfig_table(peer, afi, safi, table,
                                                        &prd);
                        }
}


struct bgp_clear_node_queue {
        struct bgp_node *rn;
};

static wq_item_status bgp_clear_route_node(struct work_queue *wq, void *data)
{
        struct bgp_clear_node_queue *cnq = data;
        struct bgp_node *rn = cnq->rn;
        struct peer *peer = wq->spec.data;
        struct bgp_info *ri;
        struct bgp *bgp;
        afi_t afi = bgp_node_table(rn)->afi;
        safi_t safi = bgp_node_table(rn)->safi;

        assert(rn && peer);
        bgp = peer->bgp;

        /* It is possible that we have multiple paths for a prefix from a peer
         * if that peer is using AddPath.
         */
        for (ri = rn->info; ri; ri = ri->next) {
                if (ri->peer != peer)
                        continue;

                /* graceful restart STALE flag set. */
                if (CHECK_FLAG(peer->sflags, PEER_STATUS_NSF_WAIT)
                    && peer->nsf[afi][safi]
                    && !CHECK_FLAG(ri->flags, BGP_INFO_STALE)
                    && !CHECK_FLAG(ri->flags, BGP_INFO_UNUSEABLE))
                        bgp_info_set_flag(rn, ri, BGP_INFO_STALE);
                else {
                        /* If this is an EVPN route, process for
                         * un-import. */
                        if (safi == SAFI_EVPN)
                                bgp_evpn_unimport_route(bgp, afi, safi,
                                                        &rn->p, ri);
                        /* Handle withdraw for VRF route-leaking and L3VPN */
                        if (SAFI_UNICAST == safi
                            && (bgp->inst_type == BGP_INSTANCE_TYPE_VRF ||
                                bgp->inst_type == BGP_INSTANCE_TYPE_DEFAULT))
                                vpn_leak_from_vrf_withdraw(bgp_get_default(),
                                                           bgp, ri);
                        if (SAFI_MPLS_VPN == safi &&
                            bgp->inst_type == BGP_INSTANCE_TYPE_DEFAULT)
                                vpn_leak_to_vrf_withdraw(bgp, ri);

                        bgp_rib_remove(rn, ri, peer, afi, safi);
                }
        }
        return WQ_SUCCESS;
}

static void bgp_clear_node_queue_del(struct work_queue *wq, void *data)
{
        struct bgp_clear_node_queue *cnq = data;
        struct bgp_node *rn = cnq->rn;
        struct bgp_table *table = bgp_node_table(rn);

        bgp_unlock_node(rn);
        bgp_table_unlock(table);
        XFREE(MTYPE_BGP_CLEAR_NODE_QUEUE, cnq);
}

static void bgp_clear_node_complete(struct work_queue *wq)
{
        struct peer *peer = wq->spec.data;

        /* Tickle FSM to start moving again */
        BGP_EVENT_ADD(peer, Clearing_Completed);

        peer_unlock(peer); /* bgp_clear_route */
}

static void bgp_clear_node_queue_init(struct peer *peer)
{
        char wname[sizeof("clear xxxx:xxxx:xxxx:xxxx:xxxx:xxxx:xxxx:xxxx")];

        snprintf(wname, sizeof(wname), "clear %s", peer->host);
#undef CLEAR_QUEUE_NAME_LEN

        if ((peer->clear_node_queue = work_queue_new(bm->master, wname))
            == NULL) {
                zlog_err("%s: Failed to allocate work queue", __func__);
                exit(1);
        }
        peer->clear_node_queue->spec.hold = 10;
        peer->clear_node_queue->spec.workfunc = &bgp_clear_route_node;
        peer->clear_node_queue->spec.del_item_data = &bgp_clear_node_queue_del;
        peer->clear_node_queue->spec.completion_func = &bgp_clear_node_complete;
        peer->clear_node_queue->spec.max_retries = 0;

        /* we only 'lock' this peer reference when the queue is actually active
         */
        peer->clear_node_queue->spec.data = peer;
}

static void bgp_clear_route_table(struct peer *peer, afi_t afi, safi_t safi,
                                  struct bgp_table *table)
{
        struct bgp_node *rn;
        int force = bm->process_main_queue ? 0 : 1;

        if (!table)
                table = peer->bgp->rib[afi][safi];

        /* If still no table => afi/safi isn't configured at all or smth. */
        if (!table)
                return;

        for (rn = bgp_table_top(table); rn; rn = bgp_route_next(rn)) {
                struct bgp_info *ri, *next;
                struct bgp_adj_in *ain;
                struct bgp_adj_in *ain_next;

                /* XXX:TODO: This is suboptimal, every non-empty route_node is
                 * queued for every clearing peer, regardless of whether it is
                 * relevant to the peer at hand.
                 *
                 * Overview: There are 3 different indices which need to be
                 * scrubbed, potentially, when a peer is removed:
                 *
                 * 1 peer's routes visible via the RIB (ie accepted routes)
                 * 2 peer's routes visible by the (optional) peer's adj-in index
                 * 3 other routes visible by the peer's adj-out index
                 *
                 * 3 there is no hurry in scrubbing, once the struct peer is
                 * removed from bgp->peer, we could just GC such deleted peer's
                 * adj-outs at our leisure.
                 *
                 * 1 and 2 must be 'scrubbed' in some way, at least made
                 * invisible via RIB index before peer session is allowed to be
                 * brought back up. So one needs to know when such a 'search' is
                 * complete.
                 *
                 * Ideally:
                 *
                 * - there'd be a single global queue or a single RIB walker
                 * - rather than tracking which route_nodes still need to be
                 *   examined on a peer basis, we'd track which peers still
                 *   aren't cleared
                 *
                 * Given that our per-peer prefix-counts now should be reliable,
                 * this may actually be achievable. It doesn't seem to be a huge
                 * problem at this time,
                 *
                 * It is possible that we have multiple paths for a prefix from
                 * a peer
                 * if that peer is using AddPath.
                 */
                ain = rn->adj_in;
                while (ain) {
                        ain_next = ain->next;

                        if (ain->peer == peer) {
                                bgp_adj_in_remove(rn, ain);
                                bgp_unlock_node(rn);
                        }

                        ain = ain_next;
                }

                for (ri = rn->info; ri; ri = next) {
                        next = ri->next;
                        if (ri->peer != peer)
                                continue;

                        if (force)
                                bgp_info_reap(rn, ri);
                        else {
                                struct bgp_clear_node_queue *cnq;

                                /* both unlocked in bgp_clear_node_queue_del */
                                bgp_table_lock(bgp_node_table(rn));
                                bgp_lock_node(rn);
                                cnq = XCALLOC(
                                        MTYPE_BGP_CLEAR_NODE_QUEUE,
                                        sizeof(struct bgp_clear_node_queue));
                                cnq->rn = rn;
                                work_queue_add(peer->clear_node_queue, cnq);
                                break;
                        }
                }
        }
        return;
}

void bgp_clear_route(struct peer *peer, afi_t afi, safi_t safi)
{
        struct bgp_node *rn;
        struct bgp_table *table;

        if (peer->clear_node_queue == NULL)
                bgp_clear_node_queue_init(peer);

        /* bgp_fsm.c keeps sessions in state Clearing, not transitioning to
         * Idle until it receives a Clearing_Completed event. This protects
         * against peers which flap faster than we can we clear, which could
         * lead to:
         *
         * a) race with routes from the new session being installed before
         *    clear_route_node visits the node (to delete the route of that
         *    peer)
         * b) resource exhaustion, clear_route_node likely leads to an entry
         *    on the process_main queue. Fast-flapping could cause that queue
         *    to grow and grow.
         */

        /* lock peer in assumption that clear-node-queue will get nodes; if so,
         * the unlock will happen upon work-queue completion; other wise, the
         * unlock happens at the end of this function.
         */
        if (!peer->clear_node_queue->thread)
                peer_lock(peer);

        if (safi != SAFI_MPLS_VPN && safi != SAFI_ENCAP && safi != SAFI_EVPN)
                bgp_clear_route_table(peer, afi, safi, NULL);
        else
                for (rn = bgp_table_top(peer->bgp->rib[afi][safi]); rn;
                     rn = bgp_route_next(rn))
                        if ((table = rn->info) != NULL)
                                bgp_clear_route_table(peer, afi, safi, table);

        /* unlock if no nodes got added to the clear-node-queue. */
        if (!peer->clear_node_queue->thread)
                peer_unlock(peer);
}

void bgp_clear_route_all(struct peer *peer)
{
        afi_t afi;
        safi_t safi;

        FOREACH_AFI_SAFI (afi, safi)
                bgp_clear_route(peer, afi, safi);

#if ENABLE_BGP_VNC
        rfapiProcessPeerDown(peer);
#endif
}

void bgp_clear_adj_in(struct peer *peer, afi_t afi, safi_t safi)
{
        struct bgp_table *table;
        struct bgp_node *rn;
        struct bgp_adj_in *ain;
        struct bgp_adj_in *ain_next;

        table = peer->bgp->rib[afi][safi];

        /* It is possible that we have multiple paths for a prefix from a peer
         * if that peer is using AddPath.
         */
        for (rn = bgp_table_top(table); rn; rn = bgp_route_next(rn)) {
                ain = rn->adj_in;

                while (ain) {
                        ain_next = ain->next;

                        if (ain->peer == peer) {
                                bgp_adj_in_remove(rn, ain);
                                bgp_unlock_node(rn);
                        }

                        ain = ain_next;
                }
        }
}

void bgp_clear_stale_route(struct peer *peer, afi_t afi, safi_t safi)
{
        struct bgp_node *rn;
        struct bgp_info *ri;
        struct bgp_table *table;

        if (safi == SAFI_MPLS_VPN) {
                for (rn = bgp_table_top(peer->bgp->rib[afi][safi]); rn;
                     rn = bgp_route_next(rn)) {
                        struct bgp_node *rm;
                        struct bgp_info *ri;

                        /* look for neighbor in tables */
                        if ((table = rn->info) == NULL)
                                continue;

                        for (rm = bgp_table_top(table); rm;
                             rm = bgp_route_next(rm))
                                for (ri = rm->info; ri; ri = ri->next) {
                                        if (ri->peer != peer)
                                                continue;
                                        if (!CHECK_FLAG(ri->flags,
                                                        BGP_INFO_STALE))
                                                break;

                                        bgp_rib_remove(rm, ri, peer, afi, safi);
                                        break;
                                }
                }
        } else {
                for (rn = bgp_table_top(peer->bgp->rib[afi][safi]); rn;
                     rn = bgp_route_next(rn))
                        for (ri = rn->info; ri; ri = ri->next) {
                                if (ri->peer != peer)
                                        continue;
                                if (!CHECK_FLAG(ri->flags, BGP_INFO_STALE))
                                        break;
                                bgp_rib_remove(rn, ri, peer, afi, safi);
                                break;
                        }
        }
}

static void bgp_cleanup_table(struct bgp *bgp, struct bgp_table *table,
                              safi_t safi)
{
        struct bgp_node *rn;
        struct bgp_info *ri;
        struct bgp_info *next;

        for (rn = bgp_table_top(table); rn; rn = bgp_route_next(rn))
                for (ri = rn->info; ri; ri = next) {
                        next = ri->next;
                        if (CHECK_FLAG(ri->flags, BGP_INFO_SELECTED)
                            && ri->type == ZEBRA_ROUTE_BGP
                            && (ri->sub_type == BGP_ROUTE_NORMAL
                                || ri->sub_type == BGP_ROUTE_AGGREGATE
                                || ri->sub_type == BGP_ROUTE_IMPORTED)) {

                                if (bgp_fibupd_safi(safi))
                                        bgp_zebra_withdraw(&rn->p, ri,
                                                           bgp, safi);
                                bgp_info_reap(rn, ri);
                        }
                }
}

/* Delete all kernel routes. */
void bgp_cleanup_routes(struct bgp *bgp)
{
        afi_t afi;
        struct bgp_node *rn;

        for (afi = AFI_IP; afi < AFI_MAX; ++afi) {
                if (afi == AFI_L2VPN)
                        continue;
                bgp_cleanup_table(bgp, bgp->rib[afi][SAFI_UNICAST],
                                  SAFI_UNICAST);
                /*
                 * VPN and ENCAP and EVPN tables are two-level (RD is top level)
                 */
                if (afi != AFI_L2VPN) {
                        safi_t safi;
                        safi = SAFI_MPLS_VPN;
                        for (rn = bgp_table_top(bgp->rib[afi][safi]); rn;
                             rn = bgp_route_next(rn)) {
                                if (rn->info) {
                                        bgp_cleanup_table(bgp,
                                                (struct bgp_table *)(rn->info),
                                                safi);
                                        bgp_table_finish((struct bgp_table **)&(
                                                rn->info));
                                        rn->info = NULL;
                                        bgp_unlock_node(rn);
                                }
                        }
                        safi = SAFI_ENCAP;
                        for (rn = bgp_table_top(bgp->rib[afi][safi]); rn;
                             rn = bgp_route_next(rn)) {
                                if (rn->info) {
                                        bgp_cleanup_table(bgp,
                                                (struct bgp_table *)(rn->info),
                                                safi);
                                        bgp_table_finish((struct bgp_table **)&(
                                                rn->info));
                                        rn->info = NULL;
                                        bgp_unlock_node(rn);
                                }
                        }
                }
        }
        for (rn = bgp_table_top(bgp->rib[AFI_L2VPN][SAFI_EVPN]); rn;
             rn = bgp_route_next(rn)) {
                if (rn->info) {
                        bgp_cleanup_table(bgp,
                                          (struct bgp_table *)(rn->info),
                                          SAFI_EVPN);
                        bgp_table_finish((struct bgp_table **)&(rn->info));
                        rn->info = NULL;
                        bgp_unlock_node(rn);
                }
        }
}

void bgp_reset(void)
{
        vty_reset();
        bgp_zclient_reset();
        access_list_reset();
        prefix_list_reset();
}

static int bgp_addpath_encode_rx(struct peer *peer, afi_t afi, safi_t safi)
{
        return (CHECK_FLAG(peer->af_cap[afi][safi], PEER_CAP_ADDPATH_AF_RX_ADV)
                && CHECK_FLAG(peer->af_cap[afi][safi],
                              PEER_CAP_ADDPATH_AF_TX_RCV));
}

/* Parse NLRI stream.  Withdraw NLRI is recognized by NULL attr
   value. */
int bgp_nlri_parse_ip(struct peer *peer, struct attr *attr,
                      struct bgp_nlri *packet)
{
        uint8_t *pnt;
        uint8_t *lim;
        struct prefix p;
        int psize;
        int ret;
        afi_t afi;
        safi_t safi;
        int addpath_encoded;
        uint32_t addpath_id;

        pnt = packet->nlri;
        lim = pnt + packet->length;
        afi = packet->afi;
        safi = packet->safi;
        addpath_id = 0;
        addpath_encoded = bgp_addpath_encode_rx(peer, afi, safi);

        /* RFC4771 6.3 The NLRI field in the UPDATE message is checked for
           syntactic validity.  If the field is syntactically incorrect,
           then the Error Subcode is set to Invalid Network Field. */
        for (; pnt < lim; pnt += psize) {
                /* Clear prefix structure. */
                memset(&p, 0, sizeof(struct prefix));

                if (addpath_encoded) {

                        /* When packet overflow occurs return immediately. */
                        if (pnt + BGP_ADDPATH_ID_LEN > lim)
                                return -1;

                        addpath_id = ntohl(*((uint32_t *)pnt));
                        pnt += BGP_ADDPATH_ID_LEN;
                }

                /* Fetch prefix length. */
                p.prefixlen = *pnt++;
                /* afi/safi validity already verified by caller,
                 * bgp_update_receive */
                p.family = afi2family(afi);

                /* Prefix length check. */
                if (p.prefixlen > prefix_blen(&p) * 8) {
                        zlog_err(
                                "%s [Error] Update packet error (wrong perfix length %d for afi %u)",
                                peer->host, p.prefixlen, packet->afi);
                        return -1;
                }

                /* Packet size overflow check. */
                psize = PSIZE(p.prefixlen);

                /* When packet overflow occur return immediately. */
                if (pnt + psize > lim) {
                        zlog_err(
                                "%s [Error] Update packet error (prefix length %d overflows packet)",
                                peer->host, p.prefixlen);
                        return -1;
                }

                /* Defensive coding, double-check the psize fits in a struct
                 * prefix */
                if (psize > (ssize_t)sizeof(p.u)) {
                        zlog_err(
                                "%s [Error] Update packet error (prefix length %d too large for prefix storage %zu)",
                                peer->host, p.prefixlen, sizeof(p.u));
                        return -1;
                }

                /* Fetch prefix from NLRI packet. */
                memcpy(&p.u.prefix, pnt, psize);

                /* Check address. */
                if (afi == AFI_IP && safi == SAFI_UNICAST) {
                        if (IN_CLASSD(ntohl(p.u.prefix4.s_addr))) {
                                /* From RFC4271 Section 6.3:
                                 *
                                 * If a prefix in the NLRI field is semantically
                                 * incorrect
                                 * (e.g., an unexpected multicast IP address),
                                 * an error SHOULD
                                 * be logged locally, and the prefix SHOULD be
                                 * ignored.
                                 */
                                zlog_err(
                                        "%s: IPv4 unicast NLRI is multicast address %s, ignoring",
                                        peer->host, inet_ntoa(p.u.prefix4));
                                continue;
                        }
                }

                /* Check address. */
                if (afi == AFI_IP6 && safi == SAFI_UNICAST) {
                        if (IN6_IS_ADDR_LINKLOCAL(&p.u.prefix6)) {
                                char buf[BUFSIZ];

                                zlog_err(
                                        "%s: IPv6 unicast NLRI is link-local address %s, ignoring",
                                        peer->host,
                                        inet_ntop(AF_INET6, &p.u.prefix6, buf,
                                                  BUFSIZ));

                                continue;
                        }
                        if (IN6_IS_ADDR_MULTICAST(&p.u.prefix6)) {
                                char buf[BUFSIZ];

                                zlog_err(
                                        "%s: IPv6 unicast NLRI is multicast address %s, ignoring",
                                        peer->host,
                                        inet_ntop(AF_INET6, &p.u.prefix6, buf,
                                                  BUFSIZ));

                                continue;
                        }
                }

                /* Normal process. */
                if (attr)
                        ret = bgp_update(peer, &p, addpath_id, attr, afi, safi,
                                         ZEBRA_ROUTE_BGP, BGP_ROUTE_NORMAL,
                                         NULL, NULL, 0, 0, NULL);
                else
                        ret = bgp_withdraw(peer, &p, addpath_id, attr, afi,
                                           safi, ZEBRA_ROUTE_BGP,
                                           BGP_ROUTE_NORMAL, NULL, NULL, 0,
                                           NULL);

                /* Address family configuration mismatch or maximum-prefix count
                   overflow. */
                if (ret < 0)
                        return -1;
        }

        /* Packet length consistency check. */
        if (pnt != lim) {
                zlog_err(
                        "%s [Error] Update packet error (prefix length mismatch with total length)",
                        peer->host);
                return -1;
        }

        return 0;
}

static struct bgp_static *bgp_static_new(void)
{
        return XCALLOC(MTYPE_BGP_STATIC, sizeof(struct bgp_static));
}

static void bgp_static_free(struct bgp_static *bgp_static)
{
        if (bgp_static->rmap.name)
                XFREE(MTYPE_ROUTE_MAP_NAME, bgp_static->rmap.name);
        if (bgp_static->eth_s_id)
                XFREE(MTYPE_ATTR, bgp_static->eth_s_id);
        XFREE(MTYPE_BGP_STATIC, bgp_static);
}

void bgp_static_update(struct bgp *bgp, struct prefix *p,
                       struct bgp_static *bgp_static, afi_t afi, safi_t safi)
{
        struct bgp_node *rn;
        struct bgp_info *ri;
        struct bgp_info *new;
        struct bgp_info info;
        struct attr attr;
        struct attr *attr_new;
        int ret;
#if ENABLE_BGP_VNC
        int vnc_implicit_withdraw = 0;
#endif

        assert(bgp_static);
        if (!bgp_static)
                return;

        rn = bgp_afi_node_get(bgp->rib[afi][safi], afi, safi, p, NULL);

        bgp_attr_default_set(&attr, BGP_ORIGIN_IGP);

        attr.nexthop = bgp_static->igpnexthop;
        attr.med = bgp_static->igpmetric;
        attr.flag |= ATTR_FLAG_BIT(BGP_ATTR_MULTI_EXIT_DISC);

        if (bgp_static->atomic)
                attr.flag |= ATTR_FLAG_BIT(BGP_ATTR_ATOMIC_AGGREGATE);

        /* Store label index, if required. */
        if (bgp_static->label_index != BGP_INVALID_LABEL_INDEX) {
                attr.label_index = bgp_static->label_index;
                attr.flag |= ATTR_FLAG_BIT(BGP_ATTR_PREFIX_SID);
        }

        /* Apply route-map. */
        if (bgp_static->rmap.name) {
                struct attr attr_tmp = attr;
                info.peer = bgp->peer_self;
                info.attr = &attr_tmp;

                SET_FLAG(bgp->peer_self->rmap_type, PEER_RMAP_TYPE_NETWORK);

                ret = route_map_apply(bgp_static->rmap.map, p, RMAP_BGP, &info);

                bgp->peer_self->rmap_type = 0;

                if (ret == RMAP_DENYMATCH) {
                        /* Free uninterned attribute. */
                        bgp_attr_flush(&attr_tmp);

                        /* Unintern original. */
                        aspath_unintern(&attr.aspath);
                        bgp_static_withdraw(bgp, p, afi, safi);
                        return;
                }

                if (bgp_flag_check(bgp, BGP_FLAG_GRACEFUL_SHUTDOWN))
                        bgp_attr_add_gshut_community(&attr_tmp);

                attr_new = bgp_attr_intern(&attr_tmp);
        } else {

                if (bgp_flag_check(bgp, BGP_FLAG_GRACEFUL_SHUTDOWN))
                        bgp_attr_add_gshut_community(&attr);

                attr_new = bgp_attr_intern(&attr);
        }

        for (ri = rn->info; ri; ri = ri->next)
                if (ri->peer == bgp->peer_self && ri->type == ZEBRA_ROUTE_BGP
                    && ri->sub_type == BGP_ROUTE_STATIC)
                        break;

        if (ri) {
                if (attrhash_cmp(ri->attr, attr_new)
                    && !CHECK_FLAG(ri->flags, BGP_INFO_REMOVED)
                    && !bgp_flag_check(bgp, BGP_FLAG_FORCE_STATIC_PROCESS)) {
                        bgp_unlock_node(rn);
                        bgp_attr_unintern(&attr_new);
                        aspath_unintern(&attr.aspath);
                        return;
                } else {
                        /* The attribute is changed. */
                        bgp_info_set_flag(rn, ri, BGP_INFO_ATTR_CHANGED);

                        /* Rewrite BGP route information. */
                        if (CHECK_FLAG(ri->flags, BGP_INFO_REMOVED))
                                bgp_info_restore(rn, ri);
                        else
                                bgp_aggregate_decrement(bgp, p, ri, afi, safi);
#if ENABLE_BGP_VNC
                        if ((afi == AFI_IP || afi == AFI_IP6)
                            && (safi == SAFI_UNICAST)) {
                                if (CHECK_FLAG(ri->flags, BGP_INFO_SELECTED)) {
                                        /*
                                         * Implicit withdraw case.
                                         * We have to do this before ri is
                                         * changed
                                         */
                                        ++vnc_implicit_withdraw;
                                        vnc_import_bgp_del_route(bgp, p, ri);
                                        vnc_import_bgp_exterior_del_route(
                                                bgp, p, ri);
                                }
                        }
#endif
                        bgp_attr_unintern(&ri->attr);
                        ri->attr = attr_new;
                        ri->uptime = bgp_clock();
#if ENABLE_BGP_VNC
                        if ((afi == AFI_IP || afi == AFI_IP6)
                            && (safi == SAFI_UNICAST)) {
                                if (vnc_implicit_withdraw) {
                                        vnc_import_bgp_add_route(bgp, p, ri);
                                        vnc_import_bgp_exterior_add_route(
                                                bgp, p, ri);
                                }
                        }
#endif

                        /* Nexthop reachability check. */
                        if (bgp_flag_check(bgp, BGP_FLAG_IMPORT_CHECK)
                            && (safi == SAFI_UNICAST
                                || safi == SAFI_LABELED_UNICAST)) {
                                if (bgp_find_or_add_nexthop(bgp, afi, ri, NULL,
                                                            0))
                                        bgp_info_set_flag(rn, ri,
                                                          BGP_INFO_VALID);
                                else {
                                        if (BGP_DEBUG(nht, NHT)) {
                                                char buf1[INET6_ADDRSTRLEN];
                                                inet_ntop(p->family,
                                                          &p->u.prefix, buf1,
                                                          INET6_ADDRSTRLEN);
                                                zlog_debug(
                                                        "%s(%s): Route not in table, not advertising",
                                                        __FUNCTION__, buf1);
                                        }
                                        bgp_info_unset_flag(rn, ri,
                                                            BGP_INFO_VALID);
                                }
                        } else {
                                /* Delete the NHT structure if any, if we're
                                 * toggling between
                                 * enabling/disabling import check. We
                                 * deregister the route
                                 * from NHT to avoid overloading NHT and the
                                 * process interaction
                                 */
                                bgp_unlink_nexthop(ri);
                                bgp_info_set_flag(rn, ri, BGP_INFO_VALID);
                        }
                        /* Process change. */
                        bgp_aggregate_increment(bgp, p, ri, afi, safi);
                        bgp_process(bgp, rn, afi, safi);

                        if (SAFI_UNICAST == safi
                            && (bgp->inst_type == BGP_INSTANCE_TYPE_VRF
                                || bgp->inst_type
                                           == BGP_INSTANCE_TYPE_DEFAULT)) {
                                vpn_leak_from_vrf_update(bgp_get_default(), bgp,
                                                         ri);
                        }

                        bgp_unlock_node(rn);
                        aspath_unintern(&attr.aspath);
                        return;
                }
        }

        /* Make new BGP info. */
        new = info_make(ZEBRA_ROUTE_BGP, BGP_ROUTE_STATIC, 0, bgp->peer_self,
                        attr_new, rn);
        /* Nexthop reachability check. */
        if (bgp_flag_check(bgp, BGP_FLAG_IMPORT_CHECK)
            && (safi == SAFI_UNICAST || safi == SAFI_LABELED_UNICAST)) {
                if (bgp_find_or_add_nexthop(bgp, afi, new, NULL, 0))
                        bgp_info_set_flag(rn, new, BGP_INFO_VALID);
                else {
                        if (BGP_DEBUG(nht, NHT)) {
                                char buf1[INET6_ADDRSTRLEN];
                                inet_ntop(p->family, &p->u.prefix, buf1,
                                          INET6_ADDRSTRLEN);
                                zlog_debug(
                                        "%s(%s): Route not in table, not advertising",
                                        __FUNCTION__, buf1);
                        }
                        bgp_info_unset_flag(rn, new, BGP_INFO_VALID);
                }
        } else {
                /* Delete the NHT structure if any, if we're toggling between
                 * enabling/disabling import check. We deregister the route
                 * from NHT to avoid overloading NHT and the process interaction
                 */
                bgp_unlink_nexthop(new);

                bgp_info_set_flag(rn, new, BGP_INFO_VALID);
        }

        /* Aggregate address increment. */
        bgp_aggregate_increment(bgp, p, new, afi, safi);

        /* Register new BGP information. */
        bgp_info_add(rn, new);

        /* route_node_get lock */
        bgp_unlock_node(rn);

        /* Process change. */
        bgp_process(bgp, rn, afi, safi);

        if (SAFI_UNICAST == safi
            && (bgp->inst_type == BGP_INSTANCE_TYPE_VRF
                || bgp->inst_type == BGP_INSTANCE_TYPE_DEFAULT)) {
                vpn_leak_from_vrf_update(bgp_get_default(), bgp, new);
        }

        /* Unintern original. */
        aspath_unintern(&attr.aspath);
}

void bgp_static_withdraw(struct bgp *bgp, struct prefix *p, afi_t afi,
                         safi_t safi)
{
        struct bgp_node *rn;
        struct bgp_info *ri;

        rn = bgp_afi_node_get(bgp->rib[afi][safi], afi, safi, p, NULL);

        /* Check selected route and self inserted route. */
        for (ri = rn->info; ri; ri = ri->next)
                if (ri->peer == bgp->peer_self && ri->type == ZEBRA_ROUTE_BGP
                    && ri->sub_type == BGP_ROUTE_STATIC)
                        break;

        /* Withdraw static BGP route from routing table. */
        if (ri) {
                if (SAFI_UNICAST == safi
                    && (bgp->inst_type == BGP_INSTANCE_TYPE_VRF
                        || bgp->inst_type == BGP_INSTANCE_TYPE_DEFAULT)) {
                        vpn_leak_from_vrf_withdraw(bgp_get_default(), bgp, ri);
                }
                bgp_aggregate_decrement(bgp, p, ri, afi, safi);
                bgp_unlink_nexthop(ri);
                bgp_info_delete(rn, ri);
                bgp_process(bgp, rn, afi, safi);
        }

        /* Unlock bgp_node_lookup. */
        bgp_unlock_node(rn);
}

/*
 * Used for SAFI_MPLS_VPN and SAFI_ENCAP
 */
static void bgp_static_withdraw_safi(struct bgp *bgp, struct prefix *p,
                                     afi_t afi, safi_t safi,
                                     struct prefix_rd *prd)
{
        struct bgp_node *rn;
        struct bgp_info *ri;

        rn = bgp_afi_node_get(bgp->rib[afi][safi], afi, safi, p, prd);

        /* Check selected route and self inserted route. */
        for (ri = rn->info; ri; ri = ri->next)
                if (ri->peer == bgp->peer_self && ri->type == ZEBRA_ROUTE_BGP
                    && ri->sub_type == BGP_ROUTE_STATIC)
                        break;

        /* Withdraw static BGP route from routing table. */
        if (ri) {
#if ENABLE_BGP_VNC
                rfapiProcessWithdraw(
                        ri->peer, NULL, p, prd, ri->attr, afi, safi, ri->type,
                        1); /* Kill, since it is an administrative change */
#endif
                if (SAFI_MPLS_VPN == safi
                    && bgp->inst_type == BGP_INSTANCE_TYPE_DEFAULT) {
                        vpn_leak_to_vrf_withdraw(bgp, ri);
                }
                bgp_aggregate_decrement(bgp, p, ri, afi, safi);
                bgp_info_delete(rn, ri);
                bgp_process(bgp, rn, afi, safi);
        }

        /* Unlock bgp_node_lookup. */
        bgp_unlock_node(rn);
}

static void bgp_static_update_safi(struct bgp *bgp, struct prefix *p,
                                   struct bgp_static *bgp_static, afi_t afi,
                                   safi_t safi)
{
        struct bgp_node *rn;
        struct bgp_info *new;
        struct attr *attr_new;
        struct attr attr = {0};
        struct bgp_info *ri;
#if ENABLE_BGP_VNC
        mpls_label_t label = 0;
#endif
        uint32_t num_labels = 0;
        union gw_addr add;

        assert(bgp_static);

        if (bgp_static->label != MPLS_INVALID_LABEL)
                num_labels = 1;
        rn = bgp_afi_node_get(bgp->rib[afi][safi], afi, safi, p,
                              &bgp_static->prd);

        bgp_attr_default_set(&attr, BGP_ORIGIN_IGP);

        attr.nexthop = bgp_static->igpnexthop;
        attr.med = bgp_static->igpmetric;
        attr.flag |= ATTR_FLAG_BIT(BGP_ATTR_MULTI_EXIT_DISC);

        if ((safi == SAFI_EVPN) || (safi == SAFI_MPLS_VPN)
            || (safi == SAFI_ENCAP)) {
                if (afi == AFI_IP) {
                        attr.mp_nexthop_global_in = bgp_static->igpnexthop;
                        attr.mp_nexthop_len = IPV4_MAX_BYTELEN;
                }
        }
        if (afi == AFI_L2VPN) {
                if (bgp_static->gatewayIp.family == AF_INET)
                        add.ipv4.s_addr =
                                bgp_static->gatewayIp.u.prefix4.s_addr;
                else if (bgp_static->gatewayIp.family == AF_INET6)
                        memcpy(&(add.ipv6), &(bgp_static->gatewayIp.u.prefix6),
                               sizeof(struct in6_addr));
                overlay_index_update(&attr, bgp_static->eth_s_id, &add);
                if (bgp_static->encap_tunneltype == BGP_ENCAP_TYPE_VXLAN) {
                        struct bgp_encap_type_vxlan bet;
                        memset(&bet, 0, sizeof(struct bgp_encap_type_vxlan));
                        bet.vnid = p->u.prefix_evpn.eth_tag;
                        bgp_encap_type_vxlan_to_tlv(&bet, &attr);
                }
                if (bgp_static->router_mac) {
                        bgp_add_routermac_ecom(&attr, bgp_static->router_mac);
                }
        }
        /* Apply route-map. */
        if (bgp_static->rmap.name) {
                struct attr attr_tmp = attr;
                struct bgp_info info;
                int ret;

                info.peer = bgp->peer_self;
                info.attr = &attr_tmp;

                SET_FLAG(bgp->peer_self->rmap_type, PEER_RMAP_TYPE_NETWORK);

                ret = route_map_apply(bgp_static->rmap.map, p, RMAP_BGP, &info);

                bgp->peer_self->rmap_type = 0;

                if (ret == RMAP_DENYMATCH) {
                        /* Free uninterned attribute. */
                        bgp_attr_flush(&attr_tmp);

                        /* Unintern original. */
                        aspath_unintern(&attr.aspath);
                        bgp_static_withdraw_safi(bgp, p, afi, safi,
                                                 &bgp_static->prd);
                        return;
                }

                attr_new = bgp_attr_intern(&attr_tmp);
        } else {
                attr_new = bgp_attr_intern(&attr);
        }

        for (ri = rn->info; ri; ri = ri->next)
                if (ri->peer == bgp->peer_self && ri->type == ZEBRA_ROUTE_BGP
                    && ri->sub_type == BGP_ROUTE_STATIC)
                        break;

        if (ri) {
                union gw_addr add;
                memset(&add, 0, sizeof(union gw_addr));
                if (attrhash_cmp(ri->attr, attr_new)
                    && overlay_index_equal(afi, ri, bgp_static->eth_s_id, &add)
                    && !CHECK_FLAG(ri->flags, BGP_INFO_REMOVED)) {
                        bgp_unlock_node(rn);
                        bgp_attr_unintern(&attr_new);
                        aspath_unintern(&attr.aspath);
                        return;
                } else {
                        /* The attribute is changed. */
                        bgp_info_set_flag(rn, ri, BGP_INFO_ATTR_CHANGED);

                        /* Rewrite BGP route information. */
                        if (CHECK_FLAG(ri->flags, BGP_INFO_REMOVED))
                                bgp_info_restore(rn, ri);
                        else
                                bgp_aggregate_decrement(bgp, p, ri, afi, safi);
                        bgp_attr_unintern(&ri->attr);
                        ri->attr = attr_new;
                        ri->uptime = bgp_clock();
#if ENABLE_BGP_VNC
                        if (ri->extra)
                                label = decode_label(&ri->extra->label[0]);
#endif

                        /* Process change. */
                        bgp_aggregate_increment(bgp, p, ri, afi, safi);
                        bgp_process(bgp, rn, afi, safi);

                        if (SAFI_MPLS_VPN == safi
                            && bgp->inst_type == BGP_INSTANCE_TYPE_DEFAULT) {
                                vpn_leak_to_vrf_update(bgp, ri);
                        }
#if ENABLE_BGP_VNC
                        rfapiProcessUpdate(ri->peer, NULL, p, &bgp_static->prd,
                                           ri->attr, afi, safi, ri->type,
                                           ri->sub_type, &label);
#endif
                        bgp_unlock_node(rn);
                        aspath_unintern(&attr.aspath);
                        return;
                }
        }


        /* Make new BGP info. */
        new = info_make(ZEBRA_ROUTE_BGP, BGP_ROUTE_STATIC, 0, bgp->peer_self,
                        attr_new, rn);
        SET_FLAG(new->flags, BGP_INFO_VALID);
        new->extra = bgp_info_extra_new();
        if (num_labels) {
                new->extra->label[0] = bgp_static->label;
                new->extra->num_labels = num_labels;
        }
#if ENABLE_BGP_VNC
        label = decode_label(&bgp_static->label);
#endif

        /* Aggregate address increment. */
        bgp_aggregate_increment(bgp, p, new, afi, safi);

        /* Register new BGP information. */
        bgp_info_add(rn, new);
        /* route_node_get lock */
        bgp_unlock_node(rn);

        /* Process change. */
        bgp_process(bgp, rn, afi, safi);

        if (SAFI_MPLS_VPN == safi
            && bgp->inst_type == BGP_INSTANCE_TYPE_DEFAULT) {
                vpn_leak_to_vrf_update(bgp, new);
        }
#if ENABLE_BGP_VNC
        rfapiProcessUpdate(new->peer, NULL, p, &bgp_static->prd, new->attr, afi,
                           safi, new->type, new->sub_type, &label);
#endif

        /* Unintern original. */
        aspath_unintern(&attr.aspath);
}

/* Configure static BGP network.  When user don't run zebra, static
   route should be installed as valid.  */
static int bgp_static_set(struct vty *vty, const char *negate,
                          const char *ip_str, afi_t afi, safi_t safi,
                          const char *rmap, int backdoor, uint32_t label_index)
{
        VTY_DECLVAR_CONTEXT(bgp, bgp);
        int ret;
        struct prefix p;
        struct bgp_static *bgp_static;
        struct bgp_node *rn;
        uint8_t need_update = 0;

        /* Convert IP prefix string to struct prefix. */
        ret = str2prefix(ip_str, &p);
        if (!ret) {
                vty_out(vty, "%% Malformed prefix\n");
                return CMD_WARNING_CONFIG_FAILED;
        }
        if (afi == AFI_IP6 && IN6_IS_ADDR_LINKLOCAL(&p.u.prefix6)) {
                vty_out(vty, "%% Malformed prefix (link-local address)\n");
                return CMD_WARNING_CONFIG_FAILED;
        }

        apply_mask(&p);

        if (negate) {

                /* Set BGP static route configuration. */
                rn = bgp_node_lookup(bgp->route[afi][safi], &p);

                if (!rn) {
                        vty_out(vty, "%% Can't find static route specified\n");
                        return CMD_WARNING_CONFIG_FAILED;
                }

                bgp_static = rn->info;

                if ((label_index != BGP_INVALID_LABEL_INDEX)
                    && (label_index != bgp_static->label_index)) {
                        vty_out(vty,
                                "%% label-index doesn't match static route\n");
                        return CMD_WARNING_CONFIG_FAILED;
                }

                if ((rmap && bgp_static->rmap.name)
                    && strcmp(rmap, bgp_static->rmap.name)) {
                        vty_out(vty,
                                "%% route-map name doesn't match static route\n");
                        return CMD_WARNING_CONFIG_FAILED;
                }

                /* Update BGP RIB. */
                if (!bgp_static->backdoor)
                        bgp_static_withdraw(bgp, &p, afi, safi);

                /* Clear configuration. */
                bgp_static_free(bgp_static);
                rn->info = NULL;
                bgp_unlock_node(rn);
                bgp_unlock_node(rn);
        } else {

                /* Set BGP static route configuration. */
                rn = bgp_node_get(bgp->route[afi][safi], &p);

                if (rn->info) {
                        /* Configuration change. */
                        bgp_static = rn->info;

                        /* Label index cannot be changed. */
                        if (bgp_static->label_index != label_index) {
                                vty_out(vty, "%% cannot change label-index\n");
                                return CMD_WARNING_CONFIG_FAILED;
                        }

                        /* Check previous routes are installed into BGP.  */
                        if (bgp_static->valid
                            && bgp_static->backdoor != backdoor)
                                need_update = 1;

                        bgp_static->backdoor = backdoor;

                        if (rmap) {
                                if (bgp_static->rmap.name)
                                        XFREE(MTYPE_ROUTE_MAP_NAME,
                                              bgp_static->rmap.name);
                                bgp_static->rmap.name =
                                        XSTRDUP(MTYPE_ROUTE_MAP_NAME, rmap);
                                bgp_static->rmap.map =
                                        route_map_lookup_by_name(rmap);
                        } else {
                                if (bgp_static->rmap.name)
                                        XFREE(MTYPE_ROUTE_MAP_NAME,
                                              bgp_static->rmap.name);
                                bgp_static->rmap.name = NULL;
                                bgp_static->rmap.map = NULL;
                                bgp_static->valid = 0;
                        }
                        bgp_unlock_node(rn);
                } else {
                        /* New configuration. */
                        bgp_static = bgp_static_new();
                        bgp_static->backdoor = backdoor;
                        bgp_static->valid = 0;
                        bgp_static->igpmetric = 0;
                        bgp_static->igpnexthop.s_addr = 0;
                        bgp_static->label_index = label_index;

                        if (rmap) {
                                if (bgp_static->rmap.name)
                                        XFREE(MTYPE_ROUTE_MAP_NAME,
                                              bgp_static->rmap.name);
                                bgp_static->rmap.name =
                                        XSTRDUP(MTYPE_ROUTE_MAP_NAME, rmap);
                                bgp_static->rmap.map =
                                        route_map_lookup_by_name(rmap);
                        }
                        rn->info = bgp_static;
                }

                bgp_static->valid = 1;
                if (need_update)
                        bgp_static_withdraw(bgp, &p, afi, safi);

                if (!bgp_static->backdoor)
                        bgp_static_update(bgp, &p, bgp_static, afi, safi);
        }

        return CMD_SUCCESS;
}

void bgp_static_add(struct bgp *bgp)
{
        afi_t afi;
        safi_t safi;
        struct bgp_node *rn;
        struct bgp_node *rm;
        struct bgp_table *table;
        struct bgp_static *bgp_static;

        FOREACH_AFI_SAFI (afi, safi)
                for (rn = bgp_table_top(bgp->route[afi][safi]); rn;
                     rn = bgp_route_next(rn)) {
                        if (rn->info == NULL)
                                continue;

                        if ((safi == SAFI_MPLS_VPN) || (safi == SAFI_ENCAP)
                            || (safi == SAFI_EVPN)) {
                                table = rn->info;

                                for (rm = bgp_table_top(table); rm;
                                     rm = bgp_route_next(rm)) {
                                        bgp_static = rm->info;
                                        bgp_static_update_safi(bgp, &rm->p,
                                                               bgp_static, afi,
                                                               safi);
                                }
                        } else {
                                bgp_static_update(bgp, &rn->p, rn->info, afi,
                                                  safi);
                        }
                }
}

/* Called from bgp_delete().  Delete all static routes from the BGP
   instance. */
void bgp_static_delete(struct bgp *bgp)
{
        afi_t afi;
        safi_t safi;
        struct bgp_node *rn;
        struct bgp_node *rm;
        struct bgp_table *table;
        struct bgp_static *bgp_static;

        FOREACH_AFI_SAFI (afi, safi)
                for (rn = bgp_table_top(bgp->route[afi][safi]); rn;
                     rn = bgp_route_next(rn)) {
                        if (rn->info == NULL)
                                continue;

                        if ((safi == SAFI_MPLS_VPN) || (safi == SAFI_ENCAP)
                            || (safi == SAFI_EVPN)) {
                                table = rn->info;

                                for (rm = bgp_table_top(table); rm;
                                     rm = bgp_route_next(rm)) {
                                        bgp_static = rm->info;
                                        bgp_static_withdraw_safi(
                                                bgp, &rm->p, AFI_IP, safi,
                                                (struct prefix_rd *)&rn->p);
                                        bgp_static_free(bgp_static);
                                        rn->info = NULL;
                                        bgp_unlock_node(rn);
                                }
                        } else {
                                bgp_static = rn->info;
                                bgp_static_withdraw(bgp, &rn->p, afi, safi);
                                bgp_static_free(bgp_static);
                                rn->info = NULL;
                                bgp_unlock_node(rn);
                        }
                }
}

void bgp_static_redo_import_check(struct bgp *bgp)
{
        afi_t afi;
        safi_t safi;
        struct bgp_node *rn;
        struct bgp_node *rm;
        struct bgp_table *table;
        struct bgp_static *bgp_static;

        /* Use this flag to force reprocessing of the route */
        bgp_flag_set(bgp, BGP_FLAG_FORCE_STATIC_PROCESS);
        FOREACH_AFI_SAFI (afi, safi) {
                for (rn = bgp_table_top(bgp->route[afi][safi]); rn;
                     rn = bgp_route_next(rn)) {
                        if (rn->info == NULL)
                                continue;

                        if ((safi == SAFI_MPLS_VPN) || (safi == SAFI_ENCAP)
                            || (safi == SAFI_EVPN)) {
                                table = rn->info;

                                for (rm = bgp_table_top(table); rm;
                                     rm = bgp_route_next(rm)) {
                                        bgp_static = rm->info;
                                        bgp_static_update_safi(bgp, &rm->p,
                                                               bgp_static, afi,
                                                               safi);
                                }
                        } else {
                                bgp_static = rn->info;
                                bgp_static_update(bgp, &rn->p, bgp_static, afi,
                                                  safi);
                        }
                }
        }
        bgp_flag_unset(bgp, BGP_FLAG_FORCE_STATIC_PROCESS);
}

static void bgp_purge_af_static_redist_routes(struct bgp *bgp, afi_t afi,
                                              safi_t safi)
{
        struct bgp_table *table;
        struct bgp_node *rn;
        struct bgp_info *ri;

        table = bgp->rib[afi][safi];
        for (rn = bgp_table_top(table); rn; rn = bgp_route_next(rn)) {
                for (ri = rn->info; ri; ri = ri->next) {
                        if (ri->peer == bgp->peer_self
                            && ((ri->type == ZEBRA_ROUTE_BGP
                                 && ri->sub_type == BGP_ROUTE_STATIC)
                                || (ri->type != ZEBRA_ROUTE_BGP
                                    && ri->sub_type
                                               == BGP_ROUTE_REDISTRIBUTE))) {
                                bgp_aggregate_decrement(bgp, &rn->p, ri, afi,
                                                        safi);
                                bgp_unlink_nexthop(ri);
                                bgp_info_delete(rn, ri);
                                bgp_process(bgp, rn, afi, safi);
                        }
                }
        }
}

/*
 * Purge all networks and redistributed routes from routing table.
 * Invoked upon the instance going down.
 */
void bgp_purge_static_redist_routes(struct bgp *bgp)
{
        afi_t afi;
        safi_t safi;

        FOREACH_AFI_SAFI (afi, safi)
                bgp_purge_af_static_redist_routes(bgp, afi, safi);
}

/*
 * gpz 110624
 * Currently this is used to set static routes for VPN and ENCAP.
 * I think it can probably be factored with bgp_static_set.
 */
int bgp_static_set_safi(afi_t afi, safi_t safi, struct vty *vty,
                        const char *ip_str, const char *rd_str,
                        const char *label_str, const char *rmap_str,
                        int evpn_type, const char *esi, const char *gwip,
                        const char *ethtag, const char *routermac)
{
        VTY_DECLVAR_CONTEXT(bgp, bgp);
        int ret;
        struct prefix p;
        struct prefix_rd prd;
        struct bgp_node *prn;
        struct bgp_node *rn;
        struct bgp_table *table;
        struct bgp_static *bgp_static;
        mpls_label_t label = MPLS_INVALID_LABEL;
        struct prefix gw_ip;

        /* validate ip prefix */
        ret = str2prefix(ip_str, &p);
        if (!ret) {
                vty_out(vty, "%% Malformed prefix\n");
                return CMD_WARNING_CONFIG_FAILED;
        }
        apply_mask(&p);
        if ((afi == AFI_L2VPN)
            && (bgp_build_evpn_prefix(evpn_type,
                                      ethtag != NULL ? atol(ethtag) : 0, &p))) {
                vty_out(vty, "%% L2VPN prefix could not be forged\n");
                return CMD_WARNING_CONFIG_FAILED;
        }

        ret = str2prefix_rd(rd_str, &prd);
        if (!ret) {
                vty_out(vty, "%% Malformed rd\n");
                return CMD_WARNING_CONFIG_FAILED;
        }

        if (label_str) {
                unsigned long label_val;
                label_val = strtoul(label_str, NULL, 10);
                encode_label(label_val, &label);
        }

        if (safi == SAFI_EVPN) {
                if (esi && str2esi(esi, NULL) == 0) {
                        vty_out(vty, "%% Malformed ESI\n");
                        return CMD_WARNING_CONFIG_FAILED;
                }
                if (routermac && prefix_str2mac(routermac, NULL) == 0) {
                        vty_out(vty, "%% Malformed Router MAC\n");
                        return CMD_WARNING_CONFIG_FAILED;
                }
                if (gwip) {
                        memset(&gw_ip, 0, sizeof(struct prefix));
                        ret = str2prefix(gwip, &gw_ip);
                        if (!ret) {
                                vty_out(vty, "%% Malformed GatewayIp\n");
                                return CMD_WARNING_CONFIG_FAILED;
                        }
                        if ((gw_ip.family == AF_INET
                             && IS_EVPN_PREFIX_IPADDR_V6(
                                        (struct prefix_evpn *)&p))
                            || (gw_ip.family == AF_INET6
                                && IS_EVPN_PREFIX_IPADDR_V4(
                                           (struct prefix_evpn *)&p))) {
                                vty_out(vty,
                                        "%% GatewayIp family differs with IP prefix\n");
                                return CMD_WARNING_CONFIG_FAILED;
                        }
                }
        }
        prn = bgp_node_get(bgp->route[afi][safi], (struct prefix *)&prd);
        if (prn->info == NULL)
                prn->info = bgp_table_init(afi, safi);
        else
                bgp_unlock_node(prn);
        table = prn->info;

        rn = bgp_node_get(table, &p);

        if (rn->info) {
                vty_out(vty, "%% Same network configuration exists\n");
                bgp_unlock_node(rn);
        } else {
                /* New configuration. */
                bgp_static = bgp_static_new();
                bgp_static->backdoor = 0;
                bgp_static->valid = 0;
                bgp_static->igpmetric = 0;
                bgp_static->igpnexthop.s_addr = 0;
                bgp_static->label = label;
                bgp_static->prd = prd;

                if (rmap_str) {
                        if (bgp_static->rmap.name)
                                XFREE(MTYPE_ROUTE_MAP_NAME,
                                      bgp_static->rmap.name);
                        bgp_static->rmap.name =
                                XSTRDUP(MTYPE_ROUTE_MAP_NAME, rmap_str);
                        bgp_static->rmap.map =
                                route_map_lookup_by_name(rmap_str);
                }

                if (safi == SAFI_EVPN) {
                        if (esi) {
                                bgp_static->eth_s_id =
                                        XCALLOC(MTYPE_ATTR,
                                                sizeof(struct eth_segment_id));
                                str2esi(esi, bgp_static->eth_s_id);
                        }
                        if (routermac) {
                                bgp_static->router_mac =
                                        XCALLOC(MTYPE_ATTR, ETH_ALEN + 1);
                                prefix_str2mac(routermac,
                                               bgp_static->router_mac);
                        }
                        if (gwip)
                                prefix_copy(&bgp_static->gatewayIp, &gw_ip);
                }
                rn->info = bgp_static;

                bgp_static->valid = 1;
                bgp_static_update_safi(bgp, &p, bgp_static, afi, safi);
        }

        return CMD_SUCCESS;
}

/* Configure static BGP network. */
int bgp_static_unset_safi(afi_t afi, safi_t safi, struct vty *vty,
                          const char *ip_str, const char *rd_str,
                          const char *label_str, int evpn_type, const char *esi,
                          const char *gwip, const char *ethtag)
{
        VTY_DECLVAR_CONTEXT(bgp, bgp);
        int ret;
        struct prefix p;
        struct prefix_rd prd;
        struct bgp_node *prn;
        struct bgp_node *rn;
        struct bgp_table *table;
        struct bgp_static *bgp_static;
        mpls_label_t label = MPLS_INVALID_LABEL;

        /* Convert IP prefix string to struct prefix. */
        ret = str2prefix(ip_str, &p);
        if (!ret) {
                vty_out(vty, "%% Malformed prefix\n");
                return CMD_WARNING_CONFIG_FAILED;
        }
        apply_mask(&p);
        if ((afi == AFI_L2VPN)
            && (bgp_build_evpn_prefix(evpn_type,
                                      ethtag != NULL ? atol(ethtag) : 0, &p))) {
                vty_out(vty, "%% L2VPN prefix could not be forged\n");
                return CMD_WARNING_CONFIG_FAILED;
        }
        ret = str2prefix_rd(rd_str, &prd);
        if (!ret) {
                vty_out(vty, "%% Malformed rd\n");
                return CMD_WARNING_CONFIG_FAILED;
        }

        if (label_str) {
                unsigned long label_val;
                label_val = strtoul(label_str, NULL, 10);
                encode_label(label_val, &label);
        }

        prn = bgp_node_get(bgp->route[afi][safi], (struct prefix *)&prd);
        if (prn->info == NULL)
                prn->info = bgp_table_init(afi, safi);
        else
                bgp_unlock_node(prn);
        table = prn->info;

        rn = bgp_node_lookup(table, &p);

        if (rn) {
                bgp_static_withdraw_safi(bgp, &p, afi, safi, &prd);

                bgp_static = rn->info;
                bgp_static_free(bgp_static);
                rn->info = NULL;
                bgp_unlock_node(rn);
                bgp_unlock_node(rn);
        } else
                vty_out(vty, "%% Can't find the route\n");

        return CMD_SUCCESS;
}

static int bgp_table_map_set(struct vty *vty, afi_t afi, safi_t safi,
                             const char *rmap_name)
{
        VTY_DECLVAR_CONTEXT(bgp, bgp);
        struct bgp_rmap *rmap;

        rmap = &bgp->table_map[afi][safi];
        if (rmap_name) {
                if (rmap->name)
                        XFREE(MTYPE_ROUTE_MAP_NAME, rmap->name);
                rmap->name = XSTRDUP(MTYPE_ROUTE_MAP_NAME, rmap_name);
                rmap->map = route_map_lookup_by_name(rmap_name);
        } else {
                if (rmap->name)
                        XFREE(MTYPE_ROUTE_MAP_NAME, rmap->name);
                rmap->name = NULL;
                rmap->map = NULL;
        }

        if (bgp_fibupd_safi(safi))
                bgp_zebra_announce_table(bgp, afi, safi);

        return CMD_SUCCESS;
}

static int bgp_table_map_unset(struct vty *vty, afi_t afi, safi_t safi,
                               const char *rmap_name)
{
        VTY_DECLVAR_CONTEXT(bgp, bgp);
        struct bgp_rmap *rmap;

        rmap = &bgp->table_map[afi][safi];
        if (rmap->name)
                XFREE(MTYPE_ROUTE_MAP_NAME, rmap->name);
        rmap->name = NULL;
        rmap->map = NULL;

        if (bgp_fibupd_safi(safi))
                bgp_zebra_announce_table(bgp, afi, safi);

        return CMD_SUCCESS;
}

void bgp_config_write_table_map(struct vty *vty, struct bgp *bgp, afi_t afi,
                                safi_t safi)
{
        if (bgp->table_map[afi][safi].name) {
                vty_out(vty, "  table-map %s\n",
                        bgp->table_map[afi][safi].name);
        }
}

DEFUN (bgp_table_map,
       bgp_table_map_cmd,
       "table-map WORD",
       "BGP table to RIB route download filter\n"
       "Name of the route map\n")
{
        int idx_word = 1;
        return bgp_table_map_set(vty, bgp_node_afi(vty), bgp_node_safi(vty),
                                 argv[idx_word]->arg);
}
DEFUN (no_bgp_table_map,
       no_bgp_table_map_cmd,
       "no table-map WORD",
       NO_STR
       "BGP table to RIB route download filter\n"
       "Name of the route map\n")
{
        int idx_word = 2;
        return bgp_table_map_unset(vty, bgp_node_afi(vty), bgp_node_safi(vty),
                                   argv[idx_word]->arg);
}

DEFPY(bgp_network,
        bgp_network_cmd,
        "[no] network \
        <A.B.C.D/M$prefix|A.B.C.D$address [mask A.B.C.D$netmask]> \
        [{route-map WORD$map_name|label-index (0-1048560)$label_index| \
        backdoor$backdoor}]",
        NO_STR
        "Specify a network to announce via BGP\n"
        "IPv4 prefix\n"
        "Network number\n"
        "Network mask\n"
        "Network mask\n"
        "Route-map to modify the attributes\n"
        "Name of the route map\n"
        "Label index to associate with the prefix\n"
        "Label index value\n"
        "Specify a BGP backdoor route\n")
{
        char addr_prefix_str[BUFSIZ];

        if (address_str) {
                int ret;

                ret = netmask_str2prefix_str(address_str, netmask_str,
                                             addr_prefix_str);
                if (!ret) {
                        vty_out(vty, "%% Inconsistent address and mask\n");
                        return CMD_WARNING_CONFIG_FAILED;
                }
        }

        return bgp_static_set(
                vty, no, address_str ? addr_prefix_str : prefix_str, AFI_IP,
                bgp_node_safi(vty), map_name, backdoor ? 1 : 0,
                label_index ? (uint32_t)label_index : BGP_INVALID_LABEL_INDEX);
}

DEFPY(ipv6_bgp_network,
        ipv6_bgp_network_cmd,
        "[no] network X:X::X:X/M$prefix \
        [{route-map WORD$map_name|label-index (0-1048560)$label_index}]",
        NO_STR
        "Specify a network to announce via BGP\n"
        "IPv6 prefix\n"
        "Route-map to modify the attributes\n"
        "Name of the route map\n"
        "Label index to associate with the prefix\n"
        "Label index value\n")
{
        return bgp_static_set(
                vty, no, prefix_str, AFI_IP6, bgp_node_safi(vty), map_name, 0,
                label_index ? (uint32_t)label_index : BGP_INVALID_LABEL_INDEX);
}

/* Aggreagete address:

  advertise-map  Set condition to advertise attribute
  as-set         Generate AS set path information
  attribute-map  Set attributes of aggregate
  route-map      Set parameters of aggregate
  summary-only   Filter more specific routes from updates
  suppress-map   Conditionally filter more specific routes from updates
  <cr>
 */
struct bgp_aggregate {
        /* Summary-only flag. */
        uint8_t summary_only;

        /* AS set generation. */
        uint8_t as_set;

        /* Route-map for aggregated route. */
        struct route_map *map;

        /* Suppress-count. */
        unsigned long count;

        /* SAFI configuration. */
        safi_t safi;
};

static struct bgp_aggregate *bgp_aggregate_new(void)
{
        return XCALLOC(MTYPE_BGP_AGGREGATE, sizeof(struct bgp_aggregate));
}

static void bgp_aggregate_free(struct bgp_aggregate *aggregate)
{
        XFREE(MTYPE_BGP_AGGREGATE, aggregate);
}

/* Update an aggregate as routes are added/removed from the BGP table */
static void bgp_aggregate_route(struct bgp *bgp, struct prefix *p,
                                struct bgp_info *rinew, afi_t afi, safi_t safi,
                                struct bgp_info *del,
                                struct bgp_aggregate *aggregate)
{
        struct bgp_table *table;
        struct bgp_node *top;
        struct bgp_node *rn;
        uint8_t origin;
        struct aspath *aspath = NULL;
        struct aspath *asmerge = NULL;
        struct community *community = NULL;
        struct community *commerge = NULL;
#if defined(AGGREGATE_NEXTHOP_CHECK)
        struct in_addr nexthop;
        uint32_t med = 0;
#endif
        struct bgp_info *ri;
        struct bgp_info *new;
        int first = 1;
        unsigned long match = 0;
        uint8_t atomic_aggregate = 0;

        /* Record adding route's nexthop and med. */
        if (rinew) {
#if defined(AGGREGATE_NEXTHOP_CHECK)
                nexthop = rinew->attr->nexthop;
                med = rinew->attr->med;
#endif
        }

        /* ORIGIN attribute: If at least one route among routes that are
           aggregated has ORIGIN with the value INCOMPLETE, then the
           aggregated route must have the ORIGIN attribute with the value
           INCOMPLETE. Otherwise, if at least one route among routes that
           are aggregated has ORIGIN with the value EGP, then the aggregated
           route must have the origin attribute with the value EGP. In all
           other case the value of the ORIGIN attribute of the aggregated
           route is INTERNAL. */
        origin = BGP_ORIGIN_IGP;

        table = bgp->rib[afi][safi];

        top = bgp_node_get(table, p);
        for (rn = bgp_node_get(table, p); rn;
             rn = bgp_route_next_until(rn, top))
                if (rn->p.prefixlen > p->prefixlen) {
                        match = 0;

                        for (ri = rn->info; ri; ri = ri->next) {
                                if (BGP_INFO_HOLDDOWN(ri))
                                        continue;

                                if (del && ri == del)
                                        continue;

                                if (!rinew && first) {
#if defined(AGGREGATE_NEXTHOP_CHECK)
                                        nexthop = ri->attr->nexthop;
                                        med = ri->attr->med;
#endif
                                        first = 0;
                                }

#ifdef AGGREGATE_NEXTHOP_CHECK
                                if (!IPV4_ADDR_SAME(&ri->attr->nexthop,
                                                    &nexthop)
                                    || ri->attr->med != med) {
                                        if (aspath)
                                                aspath_free(aspath);
                                        if (community)
                                                community_free(community);
                                        bgp_unlock_node(rn);
                                        bgp_unlock_node(top);
                                        return;
                                }
#endif /* AGGREGATE_NEXTHOP_CHECK */

                                if (ri->attr->flag
                                    & ATTR_FLAG_BIT(BGP_ATTR_ATOMIC_AGGREGATE))
                                        atomic_aggregate = 1;

                                if (ri->sub_type != BGP_ROUTE_AGGREGATE) {
                                        if (aggregate->summary_only) {
                                                (bgp_info_extra_get(ri))
                                                        ->suppress++;
                                                bgp_info_set_flag(
                                                        rn, ri,
                                                        BGP_INFO_ATTR_CHANGED);
                                                match++;
                                        }

                                        aggregate->count++;

                                        if (origin < ri->attr->origin)
                                                origin = ri->attr->origin;

                                        if (aggregate->as_set) {
                                                if (aspath) {
                                                        asmerge = aspath_aggregate(
                                                                aspath,
                                                                ri->attr->aspath);
                                                        aspath_free(aspath);
                                                        aspath = asmerge;
                                                } else
                                                        aspath = aspath_dup(
                                                                ri->attr->aspath);

                                                if (ri->attr->community) {
                                                        if (community) {
                                                                commerge = community_merge(
                                                                        community,
                                                                        ri->attr->community);
                                                                community = community_uniq_sort(
                                                                        commerge);
                                                                community_free(
                                                                        commerge);
                                                        } else
                                                                community = community_dup(
                                                                        ri->attr->community);
                                                }
                                        }
                                }
                        }
                        if (match)
                                bgp_process(bgp, rn, afi, safi);
                }
        bgp_unlock_node(top);

        if (rinew) {
                aggregate->count++;

                if (aggregate->summary_only)
                        (bgp_info_extra_get(rinew))->suppress++;

                if (origin < rinew->attr->origin)
                        origin = rinew->attr->origin;

                if (aggregate->as_set) {
                        if (aspath) {
                                asmerge = aspath_aggregate(aspath,
                                                           rinew->attr->aspath);
                                aspath_free(aspath);
                                aspath = asmerge;
                        } else
                                aspath = aspath_dup(rinew->attr->aspath);

                        if (rinew->attr->community) {
                                if (community) {
                                        commerge = community_merge(
                                                community,
                                                rinew->attr->community);
                                        community =
                                                community_uniq_sort(commerge);
                                        community_free(commerge);
                                } else
                                        community = community_dup(
                                                rinew->attr->community);
                        }
                }
        }

        if (aggregate->count > 0) {
                rn = bgp_node_get(table, p);
                new = info_make(
                        ZEBRA_ROUTE_BGP, BGP_ROUTE_AGGREGATE, 0, bgp->peer_self,
                        bgp_attr_aggregate_intern(bgp, origin, aspath,
                                                  community, aggregate->as_set,
                                                  atomic_aggregate),
                        rn);
                SET_FLAG(new->flags, BGP_INFO_VALID);

                bgp_info_add(rn, new);
                bgp_unlock_node(rn);
                bgp_process(bgp, rn, afi, safi);
        } else {
                if (aspath)
                        aspath_free(aspath);
                if (community)
                        community_free(community);
        }
}

void bgp_aggregate_delete(struct bgp *, struct prefix *, afi_t, safi_t,
                          struct bgp_aggregate *);

void bgp_aggregate_increment(struct bgp *bgp, struct prefix *p,
                             struct bgp_info *ri, afi_t afi, safi_t safi)
{
        struct bgp_node *child;
        struct bgp_node *rn;
        struct bgp_aggregate *aggregate;
        struct bgp_table *table;

        /* MPLS-VPN aggregation is not yet supported. */
        if ((safi == SAFI_MPLS_VPN) || (safi == SAFI_ENCAP)
            || (safi == SAFI_EVPN))
                return;

        table = bgp->aggregate[afi][safi];

        /* No aggregates configured. */
        if (bgp_table_top_nolock(table) == NULL)
                return;

        if (p->prefixlen == 0)
                return;

        if (BGP_INFO_HOLDDOWN(ri))
                return;

        child = bgp_node_get(table, p);

        /* Aggregate address configuration check. */
        for (rn = child; rn; rn = bgp_node_parent_nolock(rn))
                if ((aggregate = rn->info) != NULL
                    && rn->p.prefixlen < p->prefixlen) {
                        bgp_aggregate_delete(bgp, &rn->p, afi, safi, aggregate);
                        bgp_aggregate_route(bgp, &rn->p, ri, afi, safi, NULL,
                                            aggregate);
                }
        bgp_unlock_node(child);
}

void bgp_aggregate_decrement(struct bgp *bgp, struct prefix *p,
                             struct bgp_info *del, afi_t afi, safi_t safi)
{
        struct bgp_node *child;
        struct bgp_node *rn;
        struct bgp_aggregate *aggregate;
        struct bgp_table *table;

        /* MPLS-VPN aggregation is not yet supported. */
        if ((safi == SAFI_MPLS_VPN) || (safi == SAFI_ENCAP)
            || (safi == SAFI_EVPN))
                return;

        table = bgp->aggregate[afi][safi];

        /* No aggregates configured. */
        if (bgp_table_top_nolock(table) == NULL)
                return;

        if (p->prefixlen == 0)
                return;

        child = bgp_node_get(table, p);

        /* Aggregate address configuration check. */
        for (rn = child; rn; rn = bgp_node_parent_nolock(rn))
                if ((aggregate = rn->info) != NULL
                    && rn->p.prefixlen < p->prefixlen) {
                        bgp_aggregate_delete(bgp, &rn->p, afi, safi, aggregate);
                        bgp_aggregate_route(bgp, &rn->p, NULL, afi, safi, del,
                                            aggregate);
                }
        bgp_unlock_node(child);
}

/* Called via bgp_aggregate_set when the user configures aggregate-address */
static void bgp_aggregate_add(struct bgp *bgp, struct prefix *p, afi_t afi,
                              safi_t safi, struct bgp_aggregate *aggregate)
{
        struct bgp_table *table;
        struct bgp_node *top;
        struct bgp_node *rn;
        struct bgp_info *new;
        struct bgp_info *ri;
        unsigned long match;
        uint8_t origin = BGP_ORIGIN_IGP;
        struct aspath *aspath = NULL;
        struct aspath *asmerge = NULL;
        struct community *community = NULL;
        struct community *commerge = NULL;
        uint8_t atomic_aggregate = 0;

        table = bgp->rib[afi][safi];

        /* Sanity check. */
        if (afi == AFI_IP && p->prefixlen == IPV4_MAX_BITLEN)
                return;
        if (afi == AFI_IP6 && p->prefixlen == IPV6_MAX_BITLEN)
                return;

        /* If routes exists below this node, generate aggregate routes. */
        top = bgp_node_get(table, p);
        for (rn = bgp_node_get(table, p); rn;
             rn = bgp_route_next_until(rn, top)) {
                if (rn->p.prefixlen <= p->prefixlen)
                        continue;

                match = 0;

                for (ri = rn->info; ri; ri = ri->next) {
                        if (BGP_INFO_HOLDDOWN(ri))
                                continue;

                        if (ri->attr->flag
                            & ATTR_FLAG_BIT(BGP_ATTR_ATOMIC_AGGREGATE))
                                atomic_aggregate = 1;

                        if (ri->sub_type == BGP_ROUTE_AGGREGATE)
                                continue;

                        /* summary-only aggregate route suppress
                         * aggregated route announcement.  */
                        if (aggregate->summary_only) {
                                (bgp_info_extra_get(ri))->suppress++;
                                bgp_info_set_flag(rn, ri,
                                                  BGP_INFO_ATTR_CHANGED);
                                match++;
                        }

                        /* If at least one route among routes that are
                         * aggregated has ORIGIN with the value INCOMPLETE,
                         * then the aggregated route MUST have the ORIGIN
                         * attribute with the value INCOMPLETE.  Otherwise, if
                         * at least one route among routes that are aggregated
                         * has ORIGIN with the value EGP, then the aggregated
                         * route MUST have the ORIGIN attribute with the value
                         * EGP.
                         */
                        if (origin < ri->attr->origin)
                                origin = ri->attr->origin;

                        /* as-set aggregate route generate origin, as path,
                         * community aggregation.  */
                        if (aggregate->as_set) {
                                if (aspath) {
                                        asmerge = aspath_aggregate(
                                                aspath, ri->attr->aspath);
                                        aspath_free(aspath);
                                        aspath = asmerge;
                                } else
                                        aspath = aspath_dup(ri->attr->aspath);

                                if (ri->attr->community) {
                                        if (community) {
                                                commerge = community_merge(
                                                        community,
                                                        ri->attr->community);
                                                community = community_uniq_sort(
                                                        commerge);
                                                community_free(commerge);
                                        } else
                                                community = community_dup(
                                                        ri->attr->community);
                                }
                        }
                        aggregate->count++;
                }

                /* If this node is suppressed, process the change. */
                if (match)
                        bgp_process(bgp, rn, afi, safi);
        }
        bgp_unlock_node(top);

        /* Add aggregate route to BGP table. */
        if (aggregate->count) {
                rn = bgp_node_get(table, p);
                new = info_make(
                        ZEBRA_ROUTE_BGP, BGP_ROUTE_AGGREGATE, 0, bgp->peer_self,
                        bgp_attr_aggregate_intern(bgp, origin, aspath,
                                                  community, aggregate->as_set,
                                                  atomic_aggregate),
                        rn);
                SET_FLAG(new->flags, BGP_INFO_VALID);

                bgp_info_add(rn, new);
                bgp_unlock_node(rn);

                /* Process change. */
                bgp_process(bgp, rn, afi, safi);
        } else {
                if (aspath)
                        aspath_free(aspath);
                if (community)
                        community_free(community);
        }
}

void bgp_aggregate_delete(struct bgp *bgp, struct prefix *p, afi_t afi,
                          safi_t safi, struct bgp_aggregate *aggregate)
{
        struct bgp_table *table;
        struct bgp_node *top;
        struct bgp_node *rn;
        struct bgp_info *ri;
        unsigned long match;

        table = bgp->rib[afi][safi];

        if (afi == AFI_IP && p->prefixlen == IPV4_MAX_BITLEN)
                return;
        if (afi == AFI_IP6 && p->prefixlen == IPV6_MAX_BITLEN)
                return;

        /* If routes exists below this node, generate aggregate routes. */
        top = bgp_node_get(table, p);
        for (rn = bgp_node_get(table, p); rn;
             rn = bgp_route_next_until(rn, top)) {
                if (rn->p.prefixlen <= p->prefixlen)
                        continue;
                match = 0;

                for (ri = rn->info; ri; ri = ri->next) {
                        if (BGP_INFO_HOLDDOWN(ri))
                                continue;

                        if (ri->sub_type == BGP_ROUTE_AGGREGATE)
                                continue;

                        if (aggregate->summary_only && ri->extra) {
                                ri->extra->suppress--;

                                if (ri->extra->suppress == 0) {
                                        bgp_info_set_flag(
                                                rn, ri, BGP_INFO_ATTR_CHANGED);
                                        match++;
                                }
                        }
                        aggregate->count--;
                }

                /* If this node was suppressed, process the change. */
                if (match)
                        bgp_process(bgp, rn, afi, safi);
        }
        bgp_unlock_node(top);

        /* Delete aggregate route from BGP table. */
        rn = bgp_node_get(table, p);

        for (ri = rn->info; ri; ri = ri->next)
                if (ri->peer == bgp->peer_self && ri->type == ZEBRA_ROUTE_BGP
                    && ri->sub_type == BGP_ROUTE_AGGREGATE)
                        break;

        /* Withdraw static BGP route from routing table. */
        if (ri) {
                bgp_info_delete(rn, ri);
                bgp_process(bgp, rn, afi, safi);
        }

        /* Unlock bgp_node_lookup. */
        bgp_unlock_node(rn);
}

/* Aggregate route attribute. */
#define AGGREGATE_SUMMARY_ONLY 1
#define AGGREGATE_AS_SET       1

static int bgp_aggregate_unset(struct vty *vty, const char *prefix_str,
                               afi_t afi, safi_t safi)
{
        VTY_DECLVAR_CONTEXT(bgp, bgp);
        int ret;
        struct prefix p;
        struct bgp_node *rn;
        struct bgp_aggregate *aggregate;

        /* Convert string to prefix structure. */
        ret = str2prefix(prefix_str, &p);
        if (!ret) {
                vty_out(vty, "Malformed prefix\n");
                return CMD_WARNING_CONFIG_FAILED;
        }
        apply_mask(&p);

        /* Old configuration check. */
        rn = bgp_node_lookup(bgp->aggregate[afi][safi], &p);
        if (!rn) {
                vty_out(vty,
                        "%% There is no aggregate-address configuration.\n");
                return CMD_WARNING_CONFIG_FAILED;
        }

        aggregate = rn->info;
        if (aggregate->safi == SAFI_UNICAST)
                bgp_aggregate_delete(bgp, &p, afi, SAFI_UNICAST, aggregate);
        if (aggregate->safi == SAFI_LABELED_UNICAST)
                bgp_aggregate_delete(bgp, &p, afi, SAFI_LABELED_UNICAST,
                                     aggregate);
        if (aggregate->safi == SAFI_MULTICAST)
                bgp_aggregate_delete(bgp, &p, afi, SAFI_MULTICAST, aggregate);

        /* Unlock aggregate address configuration. */
        rn->info = NULL;
        bgp_aggregate_free(aggregate);
        bgp_unlock_node(rn);
        bgp_unlock_node(rn);

        return CMD_SUCCESS;
}

static int bgp_aggregate_set(struct vty *vty, const char *prefix_str, afi_t afi,
                             safi_t safi, uint8_t summary_only, uint8_t as_set)
{
        VTY_DECLVAR_CONTEXT(bgp, bgp);
        int ret;
        struct prefix p;
        struct bgp_node *rn;
        struct bgp_aggregate *aggregate;

        /* Convert string to prefix structure. */
        ret = str2prefix(prefix_str, &p);
        if (!ret) {
                vty_out(vty, "Malformed prefix\n");
                return CMD_WARNING_CONFIG_FAILED;
        }
        apply_mask(&p);

        /* Old configuration check. */
        rn = bgp_node_get(bgp->aggregate[afi][safi], &p);

        if (rn->info) {
                vty_out(vty, "There is already same aggregate network.\n");
                /* try to remove the old entry */
                ret = bgp_aggregate_unset(vty, prefix_str, afi, safi);
                if (ret) {
                        vty_out(vty, "Error deleting aggregate.\n");
                        bgp_unlock_node(rn);
                        return CMD_WARNING_CONFIG_FAILED;
                }
        }

        /* Make aggregate address structure. */
        aggregate = bgp_aggregate_new();
        aggregate->summary_only = summary_only;
        aggregate->as_set = as_set;
        aggregate->safi = safi;
        rn->info = aggregate;

        /* Aggregate address insert into BGP routing table. */
        if (safi == SAFI_UNICAST)
                bgp_aggregate_add(bgp, &p, afi, SAFI_UNICAST, aggregate);
        if (safi == SAFI_LABELED_UNICAST)
                bgp_aggregate_add(bgp, &p, afi, SAFI_LABELED_UNICAST,
                                  aggregate);
        if (safi == SAFI_MULTICAST)
                bgp_aggregate_add(bgp, &p, afi, SAFI_MULTICAST, aggregate);

        return CMD_SUCCESS;
}

DEFUN (aggregate_address,
       aggregate_address_cmd,
       "aggregate-address A.B.C.D/M [<as-set [summary-only]|summary-only [as-set]>]",
       "Configure BGP aggregate entries\n"
       "Aggregate prefix\n"
       "Generate AS set path information\n"
       "Filter more specific routes from updates\n"
       "Filter more specific routes from updates\n"
       "Generate AS set path information\n")
{
        int idx = 0;
        argv_find(argv, argc, "A.B.C.D/M", &idx);
        char *prefix = argv[idx]->arg;
        int as_set =
                argv_find(argv, argc, "as-set", &idx) ? AGGREGATE_AS_SET : 0;
        idx = 0;
        int summary_only = argv_find(argv, argc, "summary-only", &idx)
                                   ? AGGREGATE_SUMMARY_ONLY
                                   : 0;

        return bgp_aggregate_set(vty, prefix, AFI_IP, bgp_node_safi(vty),
                                 summary_only, as_set);
}

DEFUN (aggregate_address_mask,
       aggregate_address_mask_cmd,
       "aggregate-address A.B.C.D A.B.C.D [<as-set [summary-only]|summary-only [as-set]>]",
       "Configure BGP aggregate entries\n"
       "Aggregate address\n"
       "Aggregate mask\n"
       "Generate AS set path information\n"
       "Filter more specific routes from updates\n"
       "Filter more specific routes from updates\n"
       "Generate AS set path information\n")
{
        int idx = 0;
        argv_find(argv, argc, "A.B.C.D", &idx);
        char *prefix = argv[idx]->arg;
        char *mask = argv[idx + 1]->arg;
        int as_set =
                argv_find(argv, argc, "as-set", &idx) ? AGGREGATE_AS_SET : 0;
        idx = 0;
        int summary_only = argv_find(argv, argc, "summary-only", &idx)
                                   ? AGGREGATE_SUMMARY_ONLY
                                   : 0;

        char prefix_str[BUFSIZ];
        int ret = netmask_str2prefix_str(prefix, mask, prefix_str);

        if (!ret) {
                vty_out(vty, "%% Inconsistent address and mask\n");
                return CMD_WARNING_CONFIG_FAILED;
        }

        return bgp_aggregate_set(vty, prefix_str, AFI_IP, bgp_node_safi(vty),
                                 summary_only, as_set);
}

DEFUN (no_aggregate_address,
       no_aggregate_address_cmd,
       "no aggregate-address A.B.C.D/M [<as-set [summary-only]|summary-only [as-set]>]",
       NO_STR
       "Configure BGP aggregate entries\n"
       "Aggregate prefix\n"
       "Generate AS set path information\n"
       "Filter more specific routes from updates\n"
       "Filter more specific routes from updates\n"
       "Generate AS set path information\n")
{
        int idx = 0;
        argv_find(argv, argc, "A.B.C.D/M", &idx);
        char *prefix = argv[idx]->arg;
        return bgp_aggregate_unset(vty, prefix, AFI_IP, bgp_node_safi(vty));
}

DEFUN (no_aggregate_address_mask,
       no_aggregate_address_mask_cmd,
       "no aggregate-address A.B.C.D A.B.C.D [<as-set [summary-only]|summary-only [as-set]>]",
       NO_STR
       "Configure BGP aggregate entries\n"
       "Aggregate address\n"
       "Aggregate mask\n"
       "Generate AS set path information\n"
       "Filter more specific routes from updates\n"
       "Filter more specific routes from updates\n"
       "Generate AS set path information\n")
{
        int idx = 0;
        argv_find(argv, argc, "A.B.C.D", &idx);
        char *prefix = argv[idx]->arg;
        char *mask = argv[idx + 1]->arg;

        char prefix_str[BUFSIZ];
        int ret = netmask_str2prefix_str(prefix, mask, prefix_str);

        if (!ret) {
                vty_out(vty, "%% Inconsistent address and mask\n");
                return CMD_WARNING_CONFIG_FAILED;
        }

        return bgp_aggregate_unset(vty, prefix_str, AFI_IP, bgp_node_safi(vty));
}

DEFUN (ipv6_aggregate_address,
       ipv6_aggregate_address_cmd,
       "aggregate-address X:X::X:X/M [summary-only]",
       "Configure BGP aggregate entries\n"
       "Aggregate prefix\n"
       "Filter more specific routes from updates\n")
{
        int idx = 0;
        argv_find(argv, argc, "X:X::X:X/M", &idx);
        char *prefix = argv[idx]->arg;
        int sum_only = argv_find(argv, argc, "summary-only", &idx)
                               ? AGGREGATE_SUMMARY_ONLY
                               : 0;
        return bgp_aggregate_set(vty, prefix, AFI_IP6, SAFI_UNICAST, sum_only,
                                 0);
}

DEFUN (no_ipv6_aggregate_address,
       no_ipv6_aggregate_address_cmd,
       "no aggregate-address X:X::X:X/M [summary-only]",
       NO_STR
       "Configure BGP aggregate entries\n"
       "Aggregate prefix\n"
       "Filter more specific routes from updates\n")
{
        int idx = 0;
        argv_find(argv, argc, "X:X::X:X/M", &idx);
        char *prefix = argv[idx]->arg;
        return bgp_aggregate_unset(vty, prefix, AFI_IP6, SAFI_UNICAST);
}

/* Redistribute route treatment. */
void bgp_redistribute_add(struct bgp *bgp, struct prefix *p,
                          const union g_addr *nexthop, ifindex_t ifindex,
                          enum nexthop_types_t nhtype, uint32_t metric,
                          uint8_t type, unsigned short instance,
                          route_tag_t tag)
{
        struct bgp_info *new;
        struct bgp_info *bi;
        struct bgp_info info;
        struct bgp_node *bn;
        struct attr attr;
        struct attr *new_attr;
        afi_t afi;
        int ret;
        struct bgp_redist *red;

        /* Make default attribute. */
        bgp_attr_default_set(&attr, BGP_ORIGIN_INCOMPLETE);

        switch (nhtype) {
        case NEXTHOP_TYPE_IFINDEX:
                break;
        case NEXTHOP_TYPE_IPV4:
        case NEXTHOP_TYPE_IPV4_IFINDEX:
                attr.nexthop = nexthop->ipv4;
                break;
        case NEXTHOP_TYPE_IPV6:
        case NEXTHOP_TYPE_IPV6_IFINDEX:
                attr.mp_nexthop_global = nexthop->ipv6;
                attr.mp_nexthop_len = BGP_ATTR_NHLEN_IPV6_GLOBAL;
                break;
        case NEXTHOP_TYPE_BLACKHOLE:
                switch (p->family) {
                case AF_INET:
                        attr.nexthop.s_addr = INADDR_ANY;
                        break;
                case AF_INET6:
                        memset(&attr.mp_nexthop_global, 0,
                               sizeof(attr.mp_nexthop_global));
                        attr.mp_nexthop_len = BGP_ATTR_NHLEN_IPV6_GLOBAL;
                        break;
                }
                break;
        }
        attr.nh_ifindex = ifindex;

        attr.med = metric;
        attr.flag |= ATTR_FLAG_BIT(BGP_ATTR_MULTI_EXIT_DISC);
        attr.tag = tag;

        afi = family2afi(p->family);

        red = bgp_redist_lookup(bgp, afi, type, instance);
        if (red) {
                struct attr attr_new;

                /* Copy attribute for modification. */
                bgp_attr_dup(&attr_new, &attr);

                if (red->redist_metric_flag)
                        attr_new.med = red->redist_metric;

                /* Apply route-map. */
                if (red->rmap.name) {
                        info.peer = bgp->peer_self;
                        info.attr = &attr_new;

                        SET_FLAG(bgp->peer_self->rmap_type,
                                 PEER_RMAP_TYPE_REDISTRIBUTE);

                        ret = route_map_apply(red->rmap.map, p, RMAP_BGP,
                                              &info);

                        bgp->peer_self->rmap_type = 0;

                        if (ret == RMAP_DENYMATCH) {
                                /* Free uninterned attribute. */
                                bgp_attr_flush(&attr_new);

                                /* Unintern original. */
                                aspath_unintern(&attr.aspath);
                                bgp_redistribute_delete(bgp, p, type, instance);
                                return;
                        }
                }

                if (bgp_flag_check(bgp, BGP_FLAG_GRACEFUL_SHUTDOWN))
                        bgp_attr_add_gshut_community(&attr_new);

                bn = bgp_afi_node_get(bgp->rib[afi][SAFI_UNICAST], afi,
                                      SAFI_UNICAST, p, NULL);

                new_attr = bgp_attr_intern(&attr_new);

                for (bi = bn->info; bi; bi = bi->next)
                        if (bi->peer == bgp->peer_self
                            && bi->sub_type == BGP_ROUTE_REDISTRIBUTE)
                                break;

                if (bi) {
                        /* Ensure the (source route) type is updated. */
                        bi->type = type;
                        if (attrhash_cmp(bi->attr, new_attr)
                            && !CHECK_FLAG(bi->flags, BGP_INFO_REMOVED)) {
                                bgp_attr_unintern(&new_attr);
                                aspath_unintern(&attr.aspath);
                                bgp_unlock_node(bn);
                                return;
                        } else {
                                /* The attribute is changed. */
                                bgp_info_set_flag(bn, bi,
                                                  BGP_INFO_ATTR_CHANGED);

                                /* Rewrite BGP route information. */
                                if (CHECK_FLAG(bi->flags, BGP_INFO_REMOVED))
                                        bgp_info_restore(bn, bi);
                                else
                                        bgp_aggregate_decrement(bgp, p, bi, afi,
                                                                SAFI_UNICAST);
                                bgp_attr_unintern(&bi->attr);
                                bi->attr = new_attr;
                                bi->uptime = bgp_clock();

                                /* Process change. */
                                bgp_aggregate_increment(bgp, p, bi, afi,
                                                        SAFI_UNICAST);
                                bgp_process(bgp, bn, afi, SAFI_UNICAST);
                                bgp_unlock_node(bn);
                                aspath_unintern(&attr.aspath);

                                if ((bgp->inst_type == BGP_INSTANCE_TYPE_VRF)
                                    || (bgp->inst_type
                                        == BGP_INSTANCE_TYPE_DEFAULT)) {

                                        vpn_leak_from_vrf_update(
                                                bgp_get_default(), bgp, bi);
                                }
                                return;
                        }
                }

                new = info_make(type, BGP_ROUTE_REDISTRIBUTE, instance,
                                bgp->peer_self, new_attr, bn);
                SET_FLAG(new->flags, BGP_INFO_VALID);

                bgp_aggregate_increment(bgp, p, new, afi, SAFI_UNICAST);
                bgp_info_add(bn, new);
                bgp_unlock_node(bn);
                bgp_process(bgp, bn, afi, SAFI_UNICAST);

                if ((bgp->inst_type == BGP_INSTANCE_TYPE_VRF)
                    || (bgp->inst_type == BGP_INSTANCE_TYPE_DEFAULT)) {

                        vpn_leak_from_vrf_update(bgp_get_default(), bgp, new);
                }
        }

        /* Unintern original. */
        aspath_unintern(&attr.aspath);
}

void bgp_redistribute_delete(struct bgp *bgp, struct prefix *p, uint8_t type,
                             unsigned short instance)
{
        afi_t afi;
        struct bgp_node *rn;
        struct bgp_info *ri;
        struct bgp_redist *red;

        afi = family2afi(p->family);

        red = bgp_redist_lookup(bgp, afi, type, instance);
        if (red) {
                rn = bgp_afi_node_get(bgp->rib[afi][SAFI_UNICAST], afi,
                                      SAFI_UNICAST, p, NULL);

                for (ri = rn->info; ri; ri = ri->next)
                        if (ri->peer == bgp->peer_self && ri->type == type)
                                break;

                if (ri) {
                        if ((bgp->inst_type == BGP_INSTANCE_TYPE_VRF)
                            || (bgp->inst_type == BGP_INSTANCE_TYPE_DEFAULT)) {

                                vpn_leak_from_vrf_withdraw(bgp_get_default(),
                                                           bgp, ri);
                        }
                        bgp_aggregate_decrement(bgp, p, ri, afi, SAFI_UNICAST);
                        bgp_info_delete(rn, ri);
                        bgp_process(bgp, rn, afi, SAFI_UNICAST);
                }
                bgp_unlock_node(rn);
        }
}

/* Withdraw specified route type's route. */
void bgp_redistribute_withdraw(struct bgp *bgp, afi_t afi, int type,
                               unsigned short instance)
{
        struct bgp_node *rn;
        struct bgp_info *ri;
        struct bgp_table *table;

        table = bgp->rib[afi][SAFI_UNICAST];

        for (rn = bgp_table_top(table); rn; rn = bgp_route_next(rn)) {
                for (ri = rn->info; ri; ri = ri->next)
                        if (ri->peer == bgp->peer_self && ri->type == type
                            && ri->instance == instance)
                                break;

                if (ri) {
                        if ((bgp->inst_type == BGP_INSTANCE_TYPE_VRF)
                            || (bgp->inst_type == BGP_INSTANCE_TYPE_DEFAULT)) {

                                vpn_leak_from_vrf_withdraw(bgp_get_default(),
                                                           bgp, ri);
                        }
                        bgp_aggregate_decrement(bgp, &rn->p, ri, afi,
                                                SAFI_UNICAST);
                        bgp_info_delete(rn, ri);
                        bgp_process(bgp, rn, afi, SAFI_UNICAST);
                }
        }
}

/* Static function to display route. */
static void route_vty_out_route(struct prefix *p, struct vty *vty,
                                json_object *json)
{
        int len = 0;
        uint32_t destination;
        char buf[BUFSIZ];

        if (p->family == AF_INET) {
                if (!json) {
                        len = vty_out(vty, "%s",
                                      inet_ntop(p->family, &p->u.prefix, buf,
                                                BUFSIZ));
                        destination = ntohl(p->u.prefix4.s_addr);

                        if ((IN_CLASSC(destination) && p->prefixlen == 24)
                            || (IN_CLASSB(destination) && p->prefixlen == 16)
                            || (IN_CLASSA(destination) && p->prefixlen == 8)
                            || p->u.prefix4.s_addr == 0) {
                                /* When mask is natural,
                                   mask is not displayed. */
                        } else
                                len += vty_out(vty, "/%d", p->prefixlen);
                } else {
                        json_object_string_add(json, "prefix",
                                               inet_ntop(p->family,
                                                         &p->u.prefix, buf,
                                                         BUFSIZ));
                        json_object_int_add(json, "prefixLen", p->prefixlen);
                }
        } else if (p->family == AF_ETHERNET) {
                prefix2str(p, buf, PREFIX_STRLEN);
                len = vty_out(vty, "%s", buf);
        } else if (p->family == AF_EVPN) {
#if defined(HAVE_CUMULUS)
                if (!json)
                        len = vty_out(
                                vty, "%s",
                                bgp_evpn_route2str((struct prefix_evpn *)p, buf,
                                                   BUFSIZ));
                else
                        bgp_evpn_route2json((struct prefix_evpn *)p, json);
#else
                prefix2str(p, buf, PREFIX_STRLEN);
                len = vty_out(vty, "%s", buf);
#endif
        } else {
                if (!json)
                        len = vty_out(
                                vty, "%s/%d",
                                inet_ntop(p->family, &p->u.prefix, buf, BUFSIZ),
                                p->prefixlen);
        }

        if (!json) {
                len = 17 - len;
                if (len < 1)
                        vty_out(vty, "\n%*s", 20, " ");
                else
                        vty_out(vty, "%*s", len, " ");
        }
}

enum bgp_display_type {
        normal_list,
};

/* Print the short form route status for a bgp_info */
static void route_vty_short_status_out(struct vty *vty, struct bgp_info *binfo,
                                       json_object *json_path)
{
        if (json_path) {

                /* Route status display. */
                if (CHECK_FLAG(binfo->flags, BGP_INFO_REMOVED))
                        json_object_boolean_true_add(json_path, "removed");

                if (CHECK_FLAG(binfo->flags, BGP_INFO_STALE))
                        json_object_boolean_true_add(json_path, "stale");

                if (binfo->extra && binfo->extra->suppress)
                        json_object_boolean_true_add(json_path, "suppressed");

                if (CHECK_FLAG(binfo->flags, BGP_INFO_VALID)
                    && !CHECK_FLAG(binfo->flags, BGP_INFO_HISTORY))
                        json_object_boolean_true_add(json_path, "valid");

                /* Selected */
                if (CHECK_FLAG(binfo->flags, BGP_INFO_HISTORY))
                        json_object_boolean_true_add(json_path, "history");

                if (CHECK_FLAG(binfo->flags, BGP_INFO_DAMPED))
                        json_object_boolean_true_add(json_path, "damped");

                if (CHECK_FLAG(binfo->flags, BGP_INFO_SELECTED))
                        json_object_boolean_true_add(json_path, "bestpath");

                if (CHECK_FLAG(binfo->flags, BGP_INFO_MULTIPATH))
                        json_object_boolean_true_add(json_path, "multipath");

                /* Internal route. */
                if ((binfo->peer->as)
                    && (binfo->peer->as == binfo->peer->local_as))
                        json_object_string_add(json_path, "pathFrom",
                                               "internal");
                else
                        json_object_string_add(json_path, "pathFrom",
                                               "external");

                return;
        }

        /* Route status display. */
        if (CHECK_FLAG(binfo->flags, BGP_INFO_REMOVED))
                vty_out(vty, "R");
        else if (CHECK_FLAG(binfo->flags, BGP_INFO_STALE))
                vty_out(vty, "S");
        else if (binfo->extra && binfo->extra->suppress)
                vty_out(vty, "s");
        else if (CHECK_FLAG(binfo->flags, BGP_INFO_VALID)
                 && !CHECK_FLAG(binfo->flags, BGP_INFO_HISTORY))
                vty_out(vty, "*");
        else
                vty_out(vty, " ");

        /* Selected */
        if (CHECK_FLAG(binfo->flags, BGP_INFO_HISTORY))
                vty_out(vty, "h");
        else if (CHECK_FLAG(binfo->flags, BGP_INFO_DAMPED))
                vty_out(vty, "d");
        else if (CHECK_FLAG(binfo->flags, BGP_INFO_SELECTED))
                vty_out(vty, ">");
        else if (CHECK_FLAG(binfo->flags, BGP_INFO_MULTIPATH))
                vty_out(vty, "=");
        else
                vty_out(vty, " ");

        /* Internal route. */
        if (binfo->peer && (binfo->peer->as)
            && (binfo->peer->as == binfo->peer->local_as))
                vty_out(vty, "i");
        else
                vty_out(vty, " ");
}

/* called from terminal list command */
void route_vty_out(struct vty *vty, struct prefix *p, struct bgp_info *binfo,
                   int display, safi_t safi, json_object *json_paths)
{
        struct attr *attr;
        json_object *json_path = NULL;
        json_object *json_nexthops = NULL;
        json_object *json_nexthop_global = NULL;
        json_object *json_nexthop_ll = NULL;

        if (json_paths)
                json_path = json_object_new_object();

        /* short status lead text */
        route_vty_short_status_out(vty, binfo, json_path);

        if (!json_paths) {
                /* print prefix and mask */
                if (!display)
                        route_vty_out_route(p, vty, json_path);
                else
                        vty_out(vty, "%*s", 17, " ");
        } else {
                route_vty_out_route(p, vty, json_path);
        }

        /* Print attribute */
        attr = binfo->attr;
        if (!attr) {
                if (json_paths)
                        json_object_array_add(json_paths, json_path);
                else
                        vty_out(vty, "\n");

                return;
        }

        /*
         * For ENCAP and EVPN routes, nexthop address family is not
         * neccessarily the same as the prefix address family.
         * Both SAFI_MPLS_VPN and SAFI_ENCAP use the MP nexthop field
         * EVPN routes are also exchanged with a MP nexthop. Currently,
         * this
         * is only IPv4, the value will be present in either
         * attr->nexthop or
         * attr->mp_nexthop_global_in
         */
        if ((safi == SAFI_ENCAP) || (safi == SAFI_MPLS_VPN)) {
                char buf[BUFSIZ];
                char nexthop[128];
                int af = NEXTHOP_FAMILY(attr->mp_nexthop_len);

                switch (af) {
                case AF_INET:
                        sprintf(nexthop, "%s",
                                inet_ntop(af, &attr->mp_nexthop_global_in, buf,
                                          BUFSIZ));
                        break;
                case AF_INET6:
                        sprintf(nexthop, "%s",
                                inet_ntop(af, &attr->mp_nexthop_global, buf,
                                          BUFSIZ));
                        break;
                default:
                        sprintf(nexthop, "?");
                        break;
                }

                if (json_paths) {
                        json_nexthop_global = json_object_new_object();

                        json_object_string_add(json_nexthop_global, "afi",
                                               (af == AF_INET) ? "ip" : "ipv6");
                        json_object_string_add(json_nexthop_global,
                                               (af == AF_INET) ? "ip" : "ipv6",
                                               nexthop);
                        json_object_boolean_true_add(json_nexthop_global,
                                                     "used");
                } else
                        vty_out(vty, "%s", nexthop);
        } else if (safi == SAFI_EVPN) {
                if (json_paths) {
                        json_nexthop_global = json_object_new_object();

                        json_object_string_add(json_nexthop_global, "ip",
                                               inet_ntoa(attr->nexthop));
                        json_object_string_add(json_nexthop_global, "afi",
                                               "ipv4");
                        json_object_boolean_true_add(json_nexthop_global,
                                                     "used");
                } else
                        vty_out(vty, "%-16s", inet_ntoa(attr->nexthop));
        }
        /* IPv4 Next Hop */
        else if (p->family == AF_INET && !BGP_ATTR_NEXTHOP_AFI_IP6(attr)) {
                if (json_paths) {
                        json_nexthop_global = json_object_new_object();

                        if ((safi == SAFI_MPLS_VPN) || (safi == SAFI_EVPN))
                                json_object_string_add(
                                        json_nexthop_global, "ip",
                                        inet_ntoa(attr->mp_nexthop_global_in));
                        else
                                json_object_string_add(
                                        json_nexthop_global, "ip",
                                        inet_ntoa(attr->nexthop));

                        json_object_string_add(json_nexthop_global, "afi",
                                               "ipv4");
                        json_object_boolean_true_add(json_nexthop_global,
                                                     "used");
                } else {
                        if ((safi == SAFI_MPLS_VPN) || (safi == SAFI_EVPN))
                                vty_out(vty, "%-16s",
                                        inet_ntoa(attr->mp_nexthop_global_in));
                        else
                                vty_out(vty, "%-16s", inet_ntoa(attr->nexthop));
                }
        }

        /* IPv6 Next Hop */
        else if (p->family == AF_INET6 || BGP_ATTR_NEXTHOP_AFI_IP6(attr)) {
                int len;
                char buf[BUFSIZ];

                if (json_paths) {
                        json_nexthop_global = json_object_new_object();
                        json_object_string_add(
                                json_nexthop_global, "ip",
                                inet_ntop(AF_INET6, &attr->mp_nexthop_global,
                                          buf, BUFSIZ));
                        json_object_string_add(json_nexthop_global, "afi",
                                               "ipv6");
                        json_object_string_add(json_nexthop_global, "scope",
                                               "global");

                        /* We display both LL & GL if both have been
                         * received */
                        if ((attr->mp_nexthop_len == 32)
                            || (binfo->peer->conf_if)) {
                                json_nexthop_ll = json_object_new_object();
                                json_object_string_add(
                                        json_nexthop_ll, "ip",
                                        inet_ntop(AF_INET6,
                                                  &attr->mp_nexthop_local, buf,
                                                  BUFSIZ));
                                json_object_string_add(json_nexthop_ll, "afi",
                                                       "ipv6");
                                json_object_string_add(json_nexthop_ll, "scope",
                                                       "link-local");

                                if ((IPV6_ADDR_CMP(&attr->mp_nexthop_global,
                                                   &attr->mp_nexthop_local)
                                     != 0)
                                    && !attr->mp_nexthop_prefer_global)
                                        json_object_boolean_true_add(
                                                json_nexthop_ll, "used");
                                else
                                        json_object_boolean_true_add(
                                                json_nexthop_global, "used");
                        } else
                                json_object_boolean_true_add(
                                        json_nexthop_global, "used");
                } else {
                        /* Display LL if LL/Global both in table unless
                         * prefer-global is set */
                        if (((attr->mp_nexthop_len == 32)
                             && !attr->mp_nexthop_prefer_global)
                            || (binfo->peer->conf_if)) {
                                if (binfo->peer->conf_if) {
                                        len = vty_out(vty, "%s",
                                                      binfo->peer->conf_if);
                                        len = 16 - len; /* len of IPv6
                                                           addr + max
                                                           len of def
                                                           ifname */

                                        if (len < 1)
                                                vty_out(vty, "\n%*s", 36, " ");
                                        else
                                                vty_out(vty, "%*s", len, " ");
                                } else {
                                        len = vty_out(
                                                vty, "%s",
                                                inet_ntop(
                                                        AF_INET6,
                                                        &attr->mp_nexthop_local,
                                                        buf, BUFSIZ));
                                        len = 16 - len;

                                        if (len < 1)
                                                vty_out(vty, "\n%*s", 36, " ");
                                        else
                                                vty_out(vty, "%*s", len, " ");
                                }
                        } else {
                                len = vty_out(
                                        vty, "%s",
                                        inet_ntop(AF_INET6,
                                                  &attr->mp_nexthop_global, buf,
                                                  BUFSIZ));
                                len = 16 - len;

                                if (len < 1)
                                        vty_out(vty, "\n%*s", 36, " ");
                                else
                                        vty_out(vty, "%*s", len, " ");
                        }
                }
        }

        /* MED/Metric */
        if (attr->flag & ATTR_FLAG_BIT(BGP_ATTR_MULTI_EXIT_DISC))
                if (json_paths)
                        json_object_int_add(json_path, "med", attr->med);
                else
                        vty_out(vty, "%10u", attr->med);
        else if (!json_paths)
                vty_out(vty, "          ");

        /* Local Pref */
        if (attr->flag & ATTR_FLAG_BIT(BGP_ATTR_LOCAL_PREF))
                if (json_paths)
                        json_object_int_add(json_path, "localpref",
                                            attr->local_pref);
                else
                        vty_out(vty, "%7u", attr->local_pref);
        else if (!json_paths)
                vty_out(vty, "       ");

        if (json_paths)
                json_object_int_add(json_path, "weight", attr->weight);
        else
                vty_out(vty, "%7u ", attr->weight);

        if (json_paths) {
                char buf[BUFSIZ];
                json_object_string_add(
                        json_path, "peerId",
                        sockunion2str(&binfo->peer->su, buf, SU_ADDRSTRLEN));
        }

        /* Print aspath */
        if (attr->aspath) {
                if (json_paths)
                        json_object_string_add(json_path, "aspath",
                                               attr->aspath->str);
                else
                        aspath_print_vty(vty, "%s", attr->aspath, " ");
        }

        /* Print origin */
        if (json_paths)
                json_object_string_add(json_path, "origin",
                                       bgp_origin_long_str[attr->origin]);
        else
                vty_out(vty, "%s", bgp_origin_str[attr->origin]);

        if (json_paths) {
                if (json_nexthop_global || json_nexthop_ll) {
                        json_nexthops = json_object_new_array();

                        if (json_nexthop_global)
                                json_object_array_add(json_nexthops,
                                                      json_nexthop_global);

                        if (json_nexthop_ll)
                                json_object_array_add(json_nexthops,
                                                      json_nexthop_ll);

                        json_object_object_add(json_path, "nexthops",
                                               json_nexthops);
                }

                json_object_array_add(json_paths, json_path);
        } else {
                vty_out(vty, "\n");
#if ENABLE_BGP_VNC
                /* prints an additional line, indented, with VNC info, if
                 * present */
                if ((safi == SAFI_MPLS_VPN) || (safi == SAFI_ENCAP))
                        rfapi_vty_out_vncinfo(vty, p, binfo, safi);
#endif
        }
}

/* called from terminal list command */
void route_vty_out_tmp(struct vty *vty, struct prefix *p, struct attr *attr,
                       safi_t safi, uint8_t use_json, json_object *json_ar)
{
        json_object *json_status = NULL;
        json_object *json_net = NULL;
        char buff[BUFSIZ];
        /* Route status display. */
        if (use_json) {
                json_status = json_object_new_object();
                json_net = json_object_new_object();
        } else {
                vty_out(vty, "*");
                vty_out(vty, ">");
                vty_out(vty, " ");
        }

        /* print prefix and mask */
        if (use_json)
                json_object_string_add(
                        json_net, "addrPrefix",
                        inet_ntop(p->family, &p->u.prefix, buff, BUFSIZ));
        else
                route_vty_out_route(p, vty, NULL);

        /* Print attribute */
        if (attr) {
                if (use_json) {
                        if (p->family == AF_INET
                            && (safi == SAFI_MPLS_VPN || safi == SAFI_ENCAP
                                || safi == SAFI_EVPN
                                || !BGP_ATTR_NEXTHOP_AFI_IP6(attr))) {
                                if (safi == SAFI_MPLS_VPN || safi == SAFI_ENCAP
                                    || safi == SAFI_EVPN)
                                        json_object_string_add(
                                                json_net, "nextHop",
                                                inet_ntoa(
                                                        attr->mp_nexthop_global_in));
                                else
                                        json_object_string_add(
                                                json_net, "nextHop",
                                                inet_ntoa(attr->nexthop));
                        } else if (p->family == AF_INET6
                                   || BGP_ATTR_NEXTHOP_AFI_IP6(attr)) {
                                char buf[BUFSIZ];

                                json_object_string_add(
                                        json_net, "netHopGloabal",
                                        inet_ntop(AF_INET6,
                                                  &attr->mp_nexthop_global, buf,
                                                  BUFSIZ));
                        }

                        if (attr->flag
                            & ATTR_FLAG_BIT(BGP_ATTR_MULTI_EXIT_DISC))
                                json_object_int_add(json_net, "metric",
                                                    attr->med);

                        if (attr->flag & ATTR_FLAG_BIT(BGP_ATTR_LOCAL_PREF))
                                json_object_int_add(json_net, "localPref",
                                                    attr->local_pref);

                        json_object_int_add(json_net, "weight", attr->weight);

                        /* Print aspath */
                        if (attr->aspath)
                                json_object_string_add(json_net, "asPath",
                                                       attr->aspath->str);

                        /* Print origin */
                        json_object_string_add(json_net, "bgpOriginCode",
                                               bgp_origin_str[attr->origin]);
                } else {
                        if (p->family == AF_INET
                            && (safi == SAFI_MPLS_VPN || safi == SAFI_ENCAP
                                || safi == SAFI_EVPN
                                || !BGP_ATTR_NEXTHOP_AFI_IP6(attr))) {
                                if (safi == SAFI_MPLS_VPN || safi == SAFI_ENCAP
                                    || safi == SAFI_EVPN)
                                        vty_out(vty, "%-16s",
                                                inet_ntoa(
                                                        attr->mp_nexthop_global_in));
                                else
                                        vty_out(vty, "%-16s",
                                                inet_ntoa(attr->nexthop));
                        } else if (p->family == AF_INET6
                                   || BGP_ATTR_NEXTHOP_AFI_IP6(attr)) {
                                int len;
                                char buf[BUFSIZ];

                                len = vty_out(
                                        vty, "%s",
                                        inet_ntop(AF_INET6,
                                                  &attr->mp_nexthop_global, buf,
                                                  BUFSIZ));
                                len = 16 - len;
                                if (len < 1)
                                        vty_out(vty, "\n%*s", 36, " ");
                                else
                                        vty_out(vty, "%*s", len, " ");
                        }
                        if (attr->flag
                            & ATTR_FLAG_BIT(BGP_ATTR_MULTI_EXIT_DISC))
                                vty_out(vty, "%10u", attr->med);
                        else
                                vty_out(vty, "          ");

                        if (attr->flag & ATTR_FLAG_BIT(BGP_ATTR_LOCAL_PREF))
                                vty_out(vty, "%7u", attr->local_pref);
                        else
                                vty_out(vty, "       ");

                        vty_out(vty, "%7u ", attr->weight);

                        /* Print aspath */
                        if (attr->aspath)
                                aspath_print_vty(vty, "%s", attr->aspath, " ");

                        /* Print origin */
                        vty_out(vty, "%s", bgp_origin_str[attr->origin]);
                }
        }
        if (use_json) {
                json_object_boolean_true_add(json_status, "*");
                json_object_boolean_true_add(json_status, ">");
                json_object_object_add(json_net, "appliedStatusSymbols",
                                       json_status);
                char buf_cut[BUFSIZ];
                json_object_object_add(
                        json_ar,
                        inet_ntop(p->family, &p->u.prefix, buf_cut, BUFSIZ),
                        json_net);
        } else
                vty_out(vty, "\n");
}

void route_vty_out_tag(struct vty *vty, struct prefix *p,
                       struct bgp_info *binfo, int display, safi_t safi,
                       json_object *json)
{
        json_object *json_out = NULL;
        struct attr *attr;
        mpls_label_t label = MPLS_INVALID_LABEL;

        if (!binfo->extra)
                return;

        if (json)
                json_out = json_object_new_object();

        /* short status lead text */
        route_vty_short_status_out(vty, binfo, json_out);

        /* print prefix and mask */
        if (json == NULL) {
                if (!display)
                        route_vty_out_route(p, vty, NULL);
                else
                        vty_out(vty, "%*s", 17, " ");
        }

        /* Print attribute */
        attr = binfo->attr;
        if (attr) {
                if (((p->family == AF_INET)
                     && ((safi == SAFI_MPLS_VPN || safi == SAFI_ENCAP)))
                    || (safi == SAFI_EVPN && !BGP_ATTR_NEXTHOP_AFI_IP6(attr))
                    || (!BGP_ATTR_NEXTHOP_AFI_IP6(attr))) {
                        if (safi == SAFI_MPLS_VPN || safi == SAFI_ENCAP
                            || safi == SAFI_EVPN) {
                                if (json)
                                        json_object_string_add(
                                                json_out, "mpNexthopGlobalIn",
                                                inet_ntoa(
                                                        attr->mp_nexthop_global_in));
                                else
                                        vty_out(vty, "%-16s",
                                                inet_ntoa(
                                                        attr->mp_nexthop_global_in));
                        } else {
                                if (json)
                                        json_object_string_add(
                                                json_out, "nexthop",
                                                inet_ntoa(attr->nexthop));
                                else
                                        vty_out(vty, "%-16s",
                                                inet_ntoa(attr->nexthop));
                        }
                } else if (((p->family == AF_INET6)
                            && ((safi == SAFI_MPLS_VPN || safi == SAFI_ENCAP)))
                           || (safi == SAFI_EVPN
                               && BGP_ATTR_NEXTHOP_AFI_IP6(attr))
                           || (BGP_ATTR_NEXTHOP_AFI_IP6(attr))) {
                        char buf_a[BUFSIZ];
                        char buf_b[BUFSIZ];
                        char buf_c[BUFSIZ];
                        if (attr->mp_nexthop_len
                            == BGP_ATTR_NHLEN_IPV6_GLOBAL) {
                                if (json)
                                        json_object_string_add(
                                                json_out, "mpNexthopGlobalIn",
                                                inet_ntop(
                                                        AF_INET6,
                                                        &attr->mp_nexthop_global,
                                                        buf_a, BUFSIZ));
                                else
                                        vty_out(vty, "%s",
                                                inet_ntop(
                                                        AF_INET6,
                                                        &attr->mp_nexthop_global,
                                                        buf_a, BUFSIZ));
                        } else if (attr->mp_nexthop_len
                                   == BGP_ATTR_NHLEN_IPV6_GLOBAL_AND_LL) {
                                if (json) {
                                        inet_ntop(AF_INET6,
                                                  &attr->mp_nexthop_global,
                                                  buf_a, BUFSIZ);
                                        inet_ntop(AF_INET6,
                                                  &attr->mp_nexthop_local,
                                                  buf_b, BUFSIZ);
                                        sprintf(buf_c, "%s(%s)", buf_a, buf_b);
                                        json_object_string_add(
                                                json_out,
                                                "mpNexthopGlobalLocal", buf_c);
                                } else
                                        vty_out(vty, "%s(%s)",
                                                inet_ntop(
                                                        AF_INET6,
                                                        &attr->mp_nexthop_global,
                                                        buf_a, BUFSIZ),
                                                inet_ntop(
                                                        AF_INET6,
                                                        &attr->mp_nexthop_local,
                                                        buf_b, BUFSIZ));
                        }
                }
        }

        label = decode_label(&binfo->extra->label[0]);

        if (bgp_is_valid_label(&label)) {
                if (json) {
                        json_object_int_add(json_out, "notag", label);
                        json_object_array_add(json, json_out);
                } else {
                        vty_out(vty, "notag/%d", label);
                        vty_out(vty, "\n");
                }
        }
}

void route_vty_out_overlay(struct vty *vty, struct prefix *p,
                           struct bgp_info *binfo, int display,
                           json_object *json_paths)
{
        struct attr *attr;
        char buf[BUFSIZ];
        json_object *json_path = NULL;

        if (json_paths)
                json_path = json_object_new_object();

        if (!binfo->extra)
                return;

        /* short status lead text */
        route_vty_short_status_out(vty, binfo, json_path);

        /* print prefix and mask */
        if (!display)
                route_vty_out_route(p, vty, NULL);
        else
                vty_out(vty, "%*s", 17, " ");

        /* Print attribute */
        attr = binfo->attr;
        if (attr) {
                char buf1[BUFSIZ];
                int af = NEXTHOP_FAMILY(attr->mp_nexthop_len);

                switch (af) {
                case AF_INET:
                        vty_out(vty, "%-16s",
                                inet_ntop(af, &attr->mp_nexthop_global_in, buf,
                                          BUFSIZ));
                        break;
                case AF_INET6:
                        vty_out(vty, "%s(%s)",
                                inet_ntop(af, &attr->mp_nexthop_global, buf,
                                          BUFSIZ),
                                inet_ntop(af, &attr->mp_nexthop_local, buf1,
                                          BUFSIZ));
                        break;
                default:
                        vty_out(vty, "?");
                }
        }

        struct eth_segment_id *id = &(attr->evpn_overlay.eth_s_id);
        char *str = esi2str(id);
        vty_out(vty, "%s", str);
        XFREE(MTYPE_TMP, str);
        if (IS_EVPN_PREFIX_IPADDR_V4((struct prefix_evpn *)p)) {
                vty_out(vty, "/%s", inet_ntoa(attr->evpn_overlay.gw_ip.ipv4));
        } else if (IS_EVPN_PREFIX_IPADDR_V6((struct prefix_evpn *)p)) {
                vty_out(vty, "/%s",
                        inet_ntop(AF_INET6, &(attr->evpn_overlay.gw_ip.ipv6),
                                  buf, BUFSIZ));
        }
        if (attr->ecommunity) {
                char *mac = NULL;
                struct ecommunity_val *routermac = ecommunity_lookup(
                        attr->ecommunity, ECOMMUNITY_ENCODE_EVPN,
                        ECOMMUNITY_EVPN_SUBTYPE_ROUTERMAC);
                if (routermac)
                        mac = ecom_mac2str((char *)routermac->val);
                if (mac) {
                        vty_out(vty, "/%s", (char *)mac);
                        XFREE(MTYPE_TMP, mac);
                }
        }
        vty_out(vty, "\n");
}

/* dampening route */
static void damp_route_vty_out(struct vty *vty, struct prefix *p,
                               struct bgp_info *binfo, int display, safi_t safi,
                               uint8_t use_json, json_object *json)
{
        struct attr *attr;
        int len;
        char timebuf[BGP_UPTIME_LEN];

        /* short status lead text */
        route_vty_short_status_out(vty, binfo, json);

        /* print prefix and mask */
        if (!use_json) {
                if (!display)
                        route_vty_out_route(p, vty, NULL);
                else
                        vty_out(vty, "%*s", 17, " ");
        }

        len = vty_out(vty, "%s", binfo->peer->host);
        len = 17 - len;
        if (len < 1) {
                if (!use_json)
                        vty_out(vty, "\n%*s", 34, " ");
        } else {
                if (use_json)
                        json_object_int_add(json, "peerHost", len);
                else
                        vty_out(vty, "%*s", len, " ");
        }

        if (use_json)
                bgp_damp_reuse_time_vty(vty, binfo, timebuf, BGP_UPTIME_LEN,
                                        use_json, json);
        else
                vty_out(vty, "%s ", bgp_damp_reuse_time_vty(vty, binfo, timebuf,
                                                            BGP_UPTIME_LEN,
                                                            use_json, json));

        /* Print attribute */
        attr = binfo->attr;
        if (attr) {
                /* Print aspath */
                if (attr->aspath) {
                        if (use_json)
                                json_object_string_add(json, "asPath",
                                                       attr->aspath->str);
                        else
                                aspath_print_vty(vty, "%s", attr->aspath, " ");
                }

                /* Print origin */
                if (use_json)
                        json_object_string_add(json, "origin",
                                               bgp_origin_str[attr->origin]);
                else
                        vty_out(vty, "%s", bgp_origin_str[attr->origin]);
        }
        if (!use_json)
                vty_out(vty, "\n");
}

/* flap route */
static void flap_route_vty_out(struct vty *vty, struct prefix *p,
                               struct bgp_info *binfo, int display, safi_t safi,
                               uint8_t use_json, json_object *json)
{
        struct attr *attr;
        struct bgp_damp_info *bdi;
        char timebuf[BGP_UPTIME_LEN];
        int len;

        if (!binfo->extra)
                return;

        bdi = binfo->extra->damp_info;

        /* short status lead text */
        route_vty_short_status_out(vty, binfo, json);

        /* print prefix and mask */
        if (!use_json) {
                if (!display)
                        route_vty_out_route(p, vty, NULL);
                else
                        vty_out(vty, "%*s", 17, " ");
        }

        len = vty_out(vty, "%s", binfo->peer->host);
        len = 16 - len;
        if (len < 1) {
                if (!use_json)
                        vty_out(vty, "\n%*s", 33, " ");
        } else {
                if (use_json)
                        json_object_int_add(json, "peerHost", len);
                else
                        vty_out(vty, "%*s", len, " ");
        }

        len = vty_out(vty, "%d", bdi->flap);
        len = 5 - len;
        if (len < 1) {
                if (!use_json)
                        vty_out(vty, " ");
        } else {
                if (use_json)
                        json_object_int_add(json, "bdiFlap", len);
                else
                        vty_out(vty, "%*s", len, " ");
        }

        if (use_json)
                peer_uptime(bdi->start_time, timebuf, BGP_UPTIME_LEN, use_json,
                            json);
        else
                vty_out(vty, "%s ", peer_uptime(bdi->start_time, timebuf,
                                                BGP_UPTIME_LEN, 0, NULL));

        if (CHECK_FLAG(binfo->flags, BGP_INFO_DAMPED)
            && !CHECK_FLAG(binfo->flags, BGP_INFO_HISTORY)) {
                if (use_json)
                        bgp_damp_reuse_time_vty(vty, binfo, timebuf,
                                                BGP_UPTIME_LEN, use_json, json);
                else
                        vty_out(vty, "%s ",
                                bgp_damp_reuse_time_vty(vty, binfo, timebuf,
                                                        BGP_UPTIME_LEN,
                                                        use_json, json));
        } else {
                if (!use_json)
                        vty_out(vty, "%*s ", 8, " ");
        }

        /* Print attribute */
        attr = binfo->attr;
        if (attr) {
                /* Print aspath */
                if (attr->aspath) {
                        if (use_json)
                                json_object_string_add(json, "asPath",
                                                       attr->aspath->str);
                        else
                                aspath_print_vty(vty, "%s", attr->aspath, " ");
                }

                /* Print origin */
                if (use_json)
                        json_object_string_add(json, "origin",
                                               bgp_origin_str[attr->origin]);
                else
                        vty_out(vty, "%s", bgp_origin_str[attr->origin]);
        }
        if (!use_json)
                vty_out(vty, "\n");
}

static void route_vty_out_advertised_to(struct vty *vty, struct peer *peer,
                                        int *first, const char *header,
                                        json_object *json_adv_to)
{
        char buf1[INET6_ADDRSTRLEN];
        json_object *json_peer = NULL;

        if (json_adv_to) {
                /* 'advertised-to' is a dictionary of peers we have advertised
                 * this
                 * prefix too.  The key is the peer's IP or swpX, the value is
                 * the
                 * hostname if we know it and "" if not.
                 */
                json_peer = json_object_new_object();

                if (peer->hostname)
                        json_object_string_add(json_peer, "hostname",
                                               peer->hostname);

                if (peer->conf_if)
                        json_object_object_add(json_adv_to, peer->conf_if,
                                               json_peer);
                else
                        json_object_object_add(
                                json_adv_to,
                                sockunion2str(&peer->su, buf1, SU_ADDRSTRLEN),
                                json_peer);
        } else {
                if (*first) {
                        vty_out(vty, "%s", header);
                        *first = 0;
                }

                if (peer->hostname
                    && bgp_flag_check(peer->bgp, BGP_FLAG_SHOW_HOSTNAME)) {
                        if (peer->conf_if)
                                vty_out(vty, " %s(%s)", peer->hostname,
                                        peer->conf_if);
                        else
                                vty_out(vty, " %s(%s)", peer->hostname,
                                        sockunion2str(&peer->su, buf1,
                                                      SU_ADDRSTRLEN));
                } else {
                        if (peer->conf_if)
                                vty_out(vty, " %s", peer->conf_if);
                        else
                                vty_out(vty, " %s",
                                        sockunion2str(&peer->su, buf1,
                                                      SU_ADDRSTRLEN));
                }
        }
}

void route_vty_out_detail(struct vty *vty, struct bgp *bgp, struct prefix *p,
                          struct bgp_info *binfo, afi_t afi, safi_t safi,
                          json_object *json_paths)
{
        char buf[INET6_ADDRSTRLEN];
        char buf1[BUFSIZ];
#if defined(HAVE_CUMULUS)
        char buf2[EVPN_ROUTE_STRLEN];
#endif
        struct attr *attr;
        int sockunion_vty_out(struct vty *, union sockunion *);
        time_t tbuf;
        json_object *json_bestpath = NULL;
        json_object *json_cluster_list = NULL;
        json_object *json_cluster_list_list = NULL;
        json_object *json_ext_community = NULL;
        json_object *json_lcommunity = NULL;
        json_object *json_last_update = NULL;
        json_object *json_pmsi = NULL;
        json_object *json_nexthop_global = NULL;
        json_object *json_nexthop_ll = NULL;
        json_object *json_nexthops = NULL;
        json_object *json_path = NULL;
        json_object *json_peer = NULL;
        json_object *json_string = NULL;
        json_object *json_adv_to = NULL;
        int first = 0;
        struct listnode *node, *nnode;
        struct peer *peer;
        int addpath_capable;
        int has_adj;
        unsigned int first_as;

        if (json_paths) {
                json_path = json_object_new_object();
                json_peer = json_object_new_object();
                json_nexthop_global = json_object_new_object();
        }

#if defined(HAVE_CUMULUS)
        if (!json_paths && safi == SAFI_EVPN) {
                char tag_buf[30];

                bgp_evpn_route2str((struct prefix_evpn *)p, buf2, sizeof(buf2));
                vty_out(vty, "  Route %s", buf2);
                tag_buf[0] = '\0';
                if (binfo->extra && binfo->extra->num_labels) {
                        bgp_evpn_label2str(binfo->extra->label,
                                           binfo->extra->num_labels, tag_buf,
                                           sizeof(tag_buf));
                        vty_out(vty, " VNI %s", tag_buf);
                }
                vty_out(vty, "\n");
                if (binfo->extra && binfo->extra->parent) {
                        struct bgp_info *parent_ri;
                        struct bgp_node *rn, *prn;

                        parent_ri = (struct bgp_info *)binfo->extra->parent;
                        rn = parent_ri->net;
                        if (rn && rn->prn) {
                                prn = rn->prn;
                                vty_out(vty, "  Imported from %s:%s\n",
                                        prefix_rd2str(
                                                (struct prefix_rd *)&prn->p,
                                                buf1, sizeof(buf1)),
                                        buf2);
                        }
                }
        }
#endif

        attr = binfo->attr;

        if (attr) {
                /* Line1 display AS-path, Aggregator */
                if (attr->aspath) {
                        if (json_paths) {
                                if (!attr->aspath->json)
                                        aspath_str_update(attr->aspath, true);
                                json_object_lock(attr->aspath->json);
                                json_object_object_add(json_path, "aspath",
                                                       attr->aspath->json);
                        } else {
                                if (attr->aspath->segments)
                                        aspath_print_vty(vty, "  %s",
                                                         attr->aspath, "");
                                else
                                        vty_out(vty, "  Local");
                        }
                }

                if (CHECK_FLAG(binfo->flags, BGP_INFO_REMOVED)) {
                        if (json_paths)
                                json_object_boolean_true_add(json_path,
                                                             "removed");
                        else
                                vty_out(vty, ", (removed)");
                }

                if (CHECK_FLAG(binfo->flags, BGP_INFO_STALE)) {
                        if (json_paths)
                                json_object_boolean_true_add(json_path,
                                                             "stale");
                        else
                                vty_out(vty, ", (stale)");
                }

                if (CHECK_FLAG(attr->flag,
                               ATTR_FLAG_BIT(BGP_ATTR_AGGREGATOR))) {
                        if (json_paths) {
                                json_object_int_add(json_path, "aggregatorAs",
                                                    attr->aggregator_as);
                                json_object_string_add(
                                        json_path, "aggregatorId",
                                        inet_ntoa(attr->aggregator_addr));
                        } else {
                                vty_out(vty, ", (aggregated by %u %s)",
                                        attr->aggregator_as,
                                        inet_ntoa(attr->aggregator_addr));
                        }
                }

                if (CHECK_FLAG(binfo->peer->af_flags[afi][safi],
                               PEER_FLAG_REFLECTOR_CLIENT)) {
                        if (json_paths)
                                json_object_boolean_true_add(
                                        json_path, "rxedFromRrClient");
                        else
                                vty_out(vty, ", (Received from a RR-client)");
                }

                if (CHECK_FLAG(binfo->peer->af_flags[afi][safi],
                               PEER_FLAG_RSERVER_CLIENT)) {
                        if (json_paths)
                                json_object_boolean_true_add(
                                        json_path, "rxedFromRsClient");
                        else
                                vty_out(vty, ", (Received from a RS-client)");
                }

                if (CHECK_FLAG(binfo->flags, BGP_INFO_HISTORY)) {
                        if (json_paths)
                                json_object_boolean_true_add(
                                        json_path, "dampeningHistoryEntry");
                        else
                                vty_out(vty, ", (history entry)");
                } else if (CHECK_FLAG(binfo->flags, BGP_INFO_DAMPED)) {
                        if (json_paths)
                                json_object_boolean_true_add(
                                        json_path, "dampeningSuppressed");
                        else
                                vty_out(vty, ", (suppressed due to dampening)");
                }

                if (!json_paths)
                        vty_out(vty, "\n");

                /* Line2 display Next-hop, Neighbor, Router-id */
                /* Display the nexthop */
                if ((p->family == AF_INET || p->family == AF_ETHERNET
                     || p->family == AF_EVPN)
                    && (safi == SAFI_MPLS_VPN || safi == SAFI_ENCAP
                        || safi == SAFI_EVPN
                        || !BGP_ATTR_NEXTHOP_AFI_IP6(attr))) {
                        if (safi == SAFI_MPLS_VPN || safi == SAFI_ENCAP
                            || safi == SAFI_EVPN) {
                                if (json_paths)
                                        json_object_string_add(
                                                json_nexthop_global, "ip",
                                                inet_ntoa(
                                                        attr->mp_nexthop_global_in));
                                else
                                        vty_out(vty, "    %s",
                                                inet_ntoa(
                                                        attr->mp_nexthop_global_in));
                        } else {
                                if (json_paths)
                                        json_object_string_add(
                                                json_nexthop_global, "ip",
                                                inet_ntoa(attr->nexthop));
                                else
                                        vty_out(vty, "    %s",
                                                inet_ntoa(attr->nexthop));
                        }

                        if (json_paths)
                                json_object_string_add(json_nexthop_global,
                                                       "afi", "ipv4");
                } else {
                        if (json_paths) {
                                json_object_string_add(
                                        json_nexthop_global, "ip",
                                        inet_ntop(AF_INET6,
                                                  &attr->mp_nexthop_global, buf,
                                                  INET6_ADDRSTRLEN));
                                json_object_string_add(json_nexthop_global,
                                                       "afi", "ipv6");
                                json_object_string_add(json_nexthop_global,
                                                       "scope", "global");
                        } else {
                                vty_out(vty, "    %s",
                                        inet_ntop(AF_INET6,
                                                  &attr->mp_nexthop_global, buf,
                                                  INET6_ADDRSTRLEN));
                        }
                }

                /* Display the IGP cost or 'inaccessible' */
                if (!CHECK_FLAG(binfo->flags, BGP_INFO_VALID)) {
                        if (json_paths)
                                json_object_boolean_false_add(
                                        json_nexthop_global, "accessible");
                        else
                                vty_out(vty, " (inaccessible)");
                } else {
                        if (binfo->extra && binfo->extra->igpmetric) {
                                if (json_paths)
                                        json_object_int_add(
                                                json_nexthop_global, "metric",
                                                binfo->extra->igpmetric);
                                else
                                        vty_out(vty, " (metric %u)",
                                                binfo->extra->igpmetric);
                        }

                        /* IGP cost is 0, display this only for json */
                        else {
                                if (json_paths)
                                        json_object_int_add(json_nexthop_global,
                                                            "metric", 0);
                        }

                        if (json_paths)
                                json_object_boolean_true_add(
                                        json_nexthop_global, "accessible");
                }

                /* Display peer "from" output */
                /* This path was originated locally */
                if (binfo->peer == bgp->peer_self) {

                        if (safi == SAFI_EVPN
                            || (p->family == AF_INET
                                && !BGP_ATTR_NEXTHOP_AFI_IP6(attr))) {
                                if (json_paths)
                                        json_object_string_add(
                                                json_peer, "peerId", "0.0.0.0");
                                else
                                        vty_out(vty, " from 0.0.0.0 ");
                        } else {
                                if (json_paths)
                                        json_object_string_add(json_peer,
                                                               "peerId", "::");
                                else
                                        vty_out(vty, " from :: ");
                        }

                        if (json_paths)
                                json_object_string_add(
                                        json_peer, "routerId",
                                        inet_ntoa(bgp->router_id));
                        else
                                vty_out(vty, "(%s)", inet_ntoa(bgp->router_id));
                }

                /* We RXed this path from one of our peers */
                else {

                        if (json_paths) {
                                json_object_string_add(
                                        json_peer, "peerId",
                                        sockunion2str(&binfo->peer->su, buf,
                                                      SU_ADDRSTRLEN));
                                json_object_string_add(
                                        json_peer, "routerId",
                                        inet_ntop(AF_INET,
                                                  &binfo->peer->remote_id, buf1,
                                                  sizeof(buf1)));

                                if (binfo->peer->hostname)
                                        json_object_string_add(
                                                json_peer, "hostname",
                                                binfo->peer->hostname);

                                if (binfo->peer->domainname)
                                        json_object_string_add(
                                                json_peer, "domainname",
                                                binfo->peer->domainname);

                                if (binfo->peer->conf_if)
                                        json_object_string_add(
                                                json_peer, "interface",
                                                binfo->peer->conf_if);
                        } else {
                                if (binfo->peer->conf_if) {
                                        if (binfo->peer->hostname
                                            && bgp_flag_check(
                                                       binfo->peer->bgp,
                                                       BGP_FLAG_SHOW_HOSTNAME))
                                                vty_out(vty, " from %s(%s)",
                                                        binfo->peer->hostname,
                                                        binfo->peer->conf_if);
                                        else
                                                vty_out(vty, " from %s",
                                                        binfo->peer->conf_if);
                                } else {
                                        if (binfo->peer->hostname
                                            && bgp_flag_check(
                                                       binfo->peer->bgp,
                                                       BGP_FLAG_SHOW_HOSTNAME))
                                                vty_out(vty, " from %s(%s)",
                                                        binfo->peer->hostname,
                                                        binfo->peer->host);
                                        else
                                                vty_out(vty, " from %s",
                                                        sockunion2str(
                                                                &binfo->peer
                                                                         ->su,
                                                                buf,
                                                                SU_ADDRSTRLEN));
                                }

                                if (attr->flag
                                    & ATTR_FLAG_BIT(BGP_ATTR_ORIGINATOR_ID))
                                        vty_out(vty, " (%s)",
                                                inet_ntoa(attr->originator_id));
                                else
                                        vty_out(vty, " (%s)",
                                                inet_ntop(
                                                        AF_INET,
                                                        &binfo->peer->remote_id,
                                                        buf1, sizeof(buf1)));
                        }
                }

                if (!json_paths)
                        vty_out(vty, "\n");

                /* display the link-local nexthop */
                if (attr->mp_nexthop_len == BGP_ATTR_NHLEN_IPV6_GLOBAL_AND_LL) {
                        if (json_paths) {
                                json_nexthop_ll = json_object_new_object();
                                json_object_string_add(
                                        json_nexthop_ll, "ip",
                                        inet_ntop(AF_INET6,
                                                  &attr->mp_nexthop_local, buf,
                                                  INET6_ADDRSTRLEN));
                                json_object_string_add(json_nexthop_ll, "afi",
                                                       "ipv6");
                                json_object_string_add(json_nexthop_ll, "scope",
                                                       "link-local");

                                json_object_boolean_true_add(json_nexthop_ll,
                                                             "accessible");

                                if (!attr->mp_nexthop_prefer_global)
                                        json_object_boolean_true_add(
                                                json_nexthop_ll, "used");
                                else
                                        json_object_boolean_true_add(
                                                json_nexthop_global, "used");
                        } else {
                                vty_out(vty, "    (%s) %s\n",
                                        inet_ntop(AF_INET6,
                                                  &attr->mp_nexthop_local, buf,
                                                  INET6_ADDRSTRLEN),
                                        attr->mp_nexthop_prefer_global
                                                ? "(prefer-global)"
                                                : "(used)");
                        }
                }
                /* If we do not have a link-local nexthop then we must flag the
                   global as "used" */
                else {
                        if (json_paths)
                                json_object_boolean_true_add(
                                        json_nexthop_global, "used");
                }

                /* Line 3 display Origin, Med, Locpref, Weight, Tag, valid,
                 * Int/Ext/Local, Atomic, best */
                if (json_paths)
                        json_object_string_add(
                                json_path, "origin",
                                bgp_origin_long_str[attr->origin]);
                else
                        vty_out(vty, "      Origin %s",
                                bgp_origin_long_str[attr->origin]);

                if (attr->flag & ATTR_FLAG_BIT(BGP_ATTR_MULTI_EXIT_DISC)) {
                        if (json_paths)
                                json_object_int_add(json_path, "med",
                                                    attr->med);
                        else
                                vty_out(vty, ", metric %u", attr->med);
                }

                if (attr->flag & ATTR_FLAG_BIT(BGP_ATTR_LOCAL_PREF)) {
                        if (json_paths)
                                json_object_int_add(json_path, "localpref",
                                                    attr->local_pref);
                        else
                                vty_out(vty, ", localpref %u",
                                        attr->local_pref);
                } else {
                        if (json_paths)
                                json_object_int_add(json_path, "localpref",
                                                    bgp->default_local_pref);
                        else
                                vty_out(vty, ", localpref %u",
                                        bgp->default_local_pref);
                }

                if (attr->weight != 0) {
                        if (json_paths)
                                json_object_int_add(json_path, "weight",
                                                    attr->weight);
                        else
                                vty_out(vty, ", weight %u", attr->weight);
                }

                if (attr->tag != 0) {
                        if (json_paths)
                                json_object_int_add(json_path, "tag",
                                                    attr->tag);
                        else
                                vty_out(vty, ", tag %" ROUTE_TAG_PRI,
                                        attr->tag);
                }

                if (!CHECK_FLAG(binfo->flags, BGP_INFO_VALID)) {
                        if (json_paths)
                                json_object_boolean_false_add(json_path,
                                                              "valid");
                        else
                                vty_out(vty, ", invalid");
                } else if (!CHECK_FLAG(binfo->flags, BGP_INFO_HISTORY)) {
                        if (json_paths)
                                json_object_boolean_true_add(json_path,
                                                             "valid");
                        else
                                vty_out(vty, ", valid");
                }

                if (binfo->peer != bgp->peer_self) {
                        if (binfo->peer->as == binfo->peer->local_as) {
                                if (CHECK_FLAG(bgp->config,
                                               BGP_CONFIG_CONFEDERATION)) {
                                        if (json_paths)
                                                json_object_string_add(
                                                        json_peer, "type",
                                                        "confed-internal");
                                        else
                                                vty_out(vty,
                                                        ", confed-internal");
                                } else {
                                        if (json_paths)
                                                json_object_string_add(
                                                        json_peer, "type",
                                                        "internal");
                                        else
                                                vty_out(vty, ", internal");
                                }
                        } else {
                                if (bgp_confederation_peers_check(
                                            bgp, binfo->peer->as)) {
                                        if (json_paths)
                                                json_object_string_add(
                                                        json_peer, "type",
                                                        "confed-external");
                                        else
                                                vty_out(vty,
                                                        ", confed-external");
                                } else {
                                        if (json_paths)
                                                json_object_string_add(
                                                        json_peer, "type",
                                                        "external");
                                        else
                                                vty_out(vty, ", external");
                                }
                        }
                } else if (binfo->sub_type == BGP_ROUTE_AGGREGATE) {
                        if (json_paths) {
                                json_object_boolean_true_add(json_path,
                                                             "aggregated");
                                json_object_boolean_true_add(json_path,
                                                             "local");
                        } else {
                                vty_out(vty, ", aggregated, local");
                        }
                } else if (binfo->type != ZEBRA_ROUTE_BGP) {
                        if (json_paths)
                                json_object_boolean_true_add(json_path,
                                                             "sourced");
                        else
                                vty_out(vty, ", sourced");
                } else {
                        if (json_paths) {
                                json_object_boolean_true_add(json_path,
                                                             "sourced");
                                json_object_boolean_true_add(json_path,
                                                             "local");
                        } else {
                                vty_out(vty, ", sourced, local");
                        }
                }

                if (attr->flag & ATTR_FLAG_BIT(BGP_ATTR_ATOMIC_AGGREGATE)) {
                        if (json_paths)
                                json_object_boolean_true_add(json_path,
                                                             "atomicAggregate");
                        else
                                vty_out(vty, ", atomic-aggregate");
                }

                if (CHECK_FLAG(binfo->flags, BGP_INFO_MULTIPATH)
                    || (CHECK_FLAG(binfo->flags, BGP_INFO_SELECTED)
                        && bgp_info_mpath_count(binfo))) {
                        if (json_paths)
                                json_object_boolean_true_add(json_path,
                                                             "multipath");
                        else
                                vty_out(vty, ", multipath");
                }

                // Mark the bestpath(s)
                if (CHECK_FLAG(binfo->flags, BGP_INFO_DMED_SELECTED)) {
                        first_as = aspath_get_first_as(attr->aspath);

                        if (json_paths) {
                                if (!json_bestpath)
                                        json_bestpath =
                                                json_object_new_object();
                                json_object_int_add(json_bestpath,
                                                    "bestpathFromAs", first_as);
                        } else {
                                if (first_as)
                                        vty_out(vty, ", bestpath-from-AS %u",
                                                first_as);
                                else
                                        vty_out(vty,
                                                ", bestpath-from-AS Local");
                        }
                }

                if (CHECK_FLAG(binfo->flags, BGP_INFO_SELECTED)) {
                        if (json_paths) {
                                if (!json_bestpath)
                                        json_bestpath =
                                                json_object_new_object();
                                json_object_boolean_true_add(json_bestpath,
                                                             "overall");
                        } else
                                vty_out(vty, ", best");
                }

                if (json_bestpath)
                        json_object_object_add(json_path, "bestpath",
                                               json_bestpath);

                if (!json_paths)
                        vty_out(vty, "\n");

                /* Line 4 display Community */
                if (attr->community) {
                        if (json_paths) {
                                if (!attr->community->json)
                                        community_str(attr->community, true);
                                json_object_lock(attr->community->json);
                                json_object_object_add(json_path, "community",
                                                       attr->community->json);
                        } else {
                                vty_out(vty, "      Community: %s\n",
                                        attr->community->str);
                        }
                }

                /* Line 5 display Extended-community */
                if (attr->flag & ATTR_FLAG_BIT(BGP_ATTR_EXT_COMMUNITIES)) {
                        if (json_paths) {
                                json_ext_community = json_object_new_object();
                                json_object_string_add(json_ext_community,
                                                       "string",
                                                       attr->ecommunity->str);
                                json_object_object_add(json_path,
                                                       "extendedCommunity",
                                                       json_ext_community);
                        } else {
                                vty_out(vty, "      Extended Community: %s\n",
                                        attr->ecommunity->str);
                        }
                }

                /* Line 6 display Large community */
                if (attr->flag & ATTR_FLAG_BIT(BGP_ATTR_LARGE_COMMUNITIES)) {
                        if (json_paths) {
                                json_lcommunity = json_object_new_object();
                                json_object_string_add(json_lcommunity,
                                                       "string",
                                                       attr->lcommunity->str);
                                json_object_object_add(json_path,
                                                       "largeCommunity",
                                                       json_lcommunity);
                        } else {
                                vty_out(vty, "      Large Community: %s\n",
                                        attr->lcommunity->str);
                        }
                }

                /* Line 7 display Originator, Cluster-id */
                if ((attr->flag & ATTR_FLAG_BIT(BGP_ATTR_ORIGINATOR_ID))
                    || (attr->flag & ATTR_FLAG_BIT(BGP_ATTR_CLUSTER_LIST))) {
                        if (attr->flag
                            & ATTR_FLAG_BIT(BGP_ATTR_ORIGINATOR_ID)) {
                                if (json_paths)
                                        json_object_string_add(
                                                json_path, "originatorId",
                                                inet_ntoa(attr->originator_id));
                                else
                                        vty_out(vty, "      Originator: %s",
                                                inet_ntoa(attr->originator_id));
                        }

                        if (attr->flag & ATTR_FLAG_BIT(BGP_ATTR_CLUSTER_LIST)) {
                                int i;

                                if (json_paths) {
                                        json_cluster_list =
                                                json_object_new_object();
                                        json_cluster_list_list =
                                                json_object_new_array();

                                        for (i = 0;
                                             i < attr->cluster->length / 4;
                                             i++) {
                                                json_string = json_object_new_string(
                                                        inet_ntoa(
                                                                attr->cluster->list
                                                                        [i]));
                                                json_object_array_add(
                                                        json_cluster_list_list,
                                                        json_string);
                                        }

                                        /* struct cluster_list does not have
                                        "str" variable like
                                         * aspath and community do.  Add this
                                        someday if someone
                                         * asks for it.
                                        json_object_string_add(json_cluster_list,
                                        "string", attr->cluster->str);
                                         */
                                        json_object_object_add(
                                                json_cluster_list, "list",
                                                json_cluster_list_list);
                                        json_object_object_add(
                                                json_path, "clusterList",
                                                json_cluster_list);
                                } else {
                                        vty_out(vty, ", Cluster list: ");

                                        for (i = 0;
                                             i < attr->cluster->length / 4;
                                             i++) {
                                                vty_out(vty, "%s ",
                                                        inet_ntoa(
                                                                attr->cluster->list
                                                                        [i]));
                                        }
                                }
                        }

                        if (!json_paths)
                                vty_out(vty, "\n");
                }

                if (binfo->extra && binfo->extra->damp_info)
                        bgp_damp_info_vty(vty, binfo, json_path);

/* Remote Label */
#if defined(HAVE_CUMULUS)
                if (binfo->extra && bgp_is_valid_label(&binfo->extra->label[0])
                    && safi != SAFI_EVPN)
#else
                if (binfo->extra && bgp_is_valid_label(&binfo->extra->label[0]))
#endif
                {
                        mpls_label_t label =
                                label_pton(&binfo->extra->label[0]);
                        if (json_paths)
                                json_object_int_add(json_path, "remoteLabel",
                                                    label);
                        else
                                vty_out(vty, "      Remote label: %d\n", label);
                }

                /* Label Index */
                if (attr->label_index != BGP_INVALID_LABEL_INDEX) {
                        if (json_paths)
                                json_object_int_add(json_path, "labelIndex",
                                                    attr->label_index);
                        else
                                vty_out(vty, "      Label Index: %d\n",
                                        attr->label_index);
                }

                /* Line 8 display Addpath IDs */
                if (binfo->addpath_rx_id || binfo->addpath_tx_id) {
                        if (json_paths) {
                                json_object_int_add(json_path, "addpathRxId",
                                                    binfo->addpath_rx_id);
                                json_object_int_add(json_path, "addpathTxId",
                                                    binfo->addpath_tx_id);
                        } else {
                                vty_out(vty, "      AddPath ID: RX %u, TX %u\n",
                                        binfo->addpath_rx_id,
                                        binfo->addpath_tx_id);
                        }
                }

                /* If we used addpath to TX a non-bestpath we need to display
                 * "Advertised to" on a path-by-path basis */
                if (bgp->addpath_tx_used[afi][safi]) {
                        first = 1;

                        for (ALL_LIST_ELEMENTS(bgp->peer, node, nnode, peer)) {
                                addpath_capable =
                                        bgp_addpath_encode_tx(peer, afi, safi);
                                has_adj = bgp_adj_out_lookup(
                                        peer, binfo->net, binfo->addpath_tx_id);

                                if ((addpath_capable && has_adj)
                                    || (!addpath_capable && has_adj
                                        && CHECK_FLAG(binfo->flags,
                                                      BGP_INFO_SELECTED))) {
                                        if (json_path && !json_adv_to)
                                                json_adv_to =
                                                        json_object_new_object();

                                        route_vty_out_advertised_to(
                                                vty, peer, &first,
                                                "      Advertised to:",
                                                json_adv_to);
                                }
                        }

                        if (json_path) {
                                if (json_adv_to) {
                                        json_object_object_add(json_path,
                                                               "advertisedTo",
                                                               json_adv_to);
                                }
                        } else {
                                if (!first) {
                                        vty_out(vty, "\n");
                                }
                        }
                }

                /* Line 9 display Uptime */
                tbuf = time(NULL) - (bgp_clock() - binfo->uptime);
                if (json_paths) {
                        json_last_update = json_object_new_object();
                        json_object_int_add(json_last_update, "epoch", tbuf);
                        json_object_string_add(json_last_update, "string",
                                               ctime(&tbuf));
                        json_object_object_add(json_path, "lastUpdate",
                                               json_last_update);
                } else
                        vty_out(vty, "      Last update: %s", ctime(&tbuf));

                /* Line 10 display PMSI tunnel attribute, if present */
                if (attr->flag & ATTR_FLAG_BIT(BGP_ATTR_PMSI_TUNNEL)) {
                        const char *str = lookup_msg(bgp_pmsi_tnltype_str,
                                                     attr->pmsi_tnl_type,
                                                     PMSI_TNLTYPE_STR_DEFAULT);

                        if (json_paths) {
                                json_pmsi = json_object_new_object();
                                json_object_string_add(json_pmsi,
                                                       "tunnelType", str);
                                json_object_object_add(json_path, "pmsi",
                                                       json_pmsi);
                        } else
                                vty_out(vty, "      PMSI Tunnel Type: %s\n",
                                        str);
                }

        }

        /* We've constructed the json object for this path, add it to the json
         * array of paths
         */
        if (json_paths) {
                if (json_nexthop_global || json_nexthop_ll) {
                        json_nexthops = json_object_new_array();

                        if (json_nexthop_global)
                                json_object_array_add(json_nexthops,
                                                      json_nexthop_global);

                        if (json_nexthop_ll)
                                json_object_array_add(json_nexthops,
                                                      json_nexthop_ll);

                        json_object_object_add(json_path, "nexthops",
                                               json_nexthops);
                }

                json_object_object_add(json_path, "peer", json_peer);
                json_object_array_add(json_paths, json_path);
        } else
                vty_out(vty, "\n");
}

#define BGP_SHOW_HEADER_CSV "Flags, Network, Next Hop, Metric, LocPrf, Weight, Path"
#define BGP_SHOW_DAMP_HEADER "   Network          From             Reuse    Path\n"
#define BGP_SHOW_FLAP_HEADER "   Network          From            Flaps Duration Reuse    Path\n"

static int bgp_show_prefix_list(struct vty *vty, struct bgp *bgp,
                                const char *prefix_list_str, afi_t afi,
                                safi_t safi, enum bgp_show_type type);
static int bgp_show_filter_list(struct vty *vty, struct bgp *bgp,
                                const char *filter, afi_t afi, safi_t safi,
                                enum bgp_show_type type);
static int bgp_show_route_map(struct vty *vty, struct bgp *bgp,
                              const char *rmap_str, afi_t afi, safi_t safi,
                              enum bgp_show_type type);
static int bgp_show_community_list(struct vty *vty, struct bgp *bgp,
                                   const char *com, int exact, afi_t afi,
                                   safi_t safi);
static int bgp_show_prefix_longer(struct vty *vty, struct bgp *bgp,
                                  const char *prefix, afi_t afi, safi_t safi,
                                  enum bgp_show_type type);
static int bgp_show_regexp(struct vty *vty, struct bgp *bgp, const char *regstr,
                           afi_t afi, safi_t safi, enum bgp_show_type type);
static int bgp_show_community(struct vty *vty, struct bgp *bgp,
                              const char *comstr, int exact, afi_t afi,
                              safi_t safi);


static int bgp_show_table(struct vty *vty, struct bgp *bgp, safi_t safi,
                          struct bgp_table *table, enum bgp_show_type type,
                          void *output_arg, uint8_t use_json, char *rd,
                          int is_last, unsigned long *output_cum,
                          unsigned long *total_cum,
                          unsigned long *json_header_depth)
{
        struct bgp_info *ri;
        struct bgp_node *rn;
        int header = 1;
        int display;
        unsigned long output_count = 0;
        unsigned long total_count = 0;
        struct prefix *p;
        char buf[BUFSIZ];
        char buf2[BUFSIZ];
        json_object *json_paths = NULL;
        int first = 1;

        if (output_cum && *output_cum != 0)
                header = 0;

        if (use_json && !*json_header_depth) {
                vty_out(vty,
                        "{\n \"vrfId\": %d,\n \"vrfName\": \"%s\",\n \"tableVersion\": %" PRId64
                        ",\n \"routerId\": \"%s\",\n \"routes\": { ",
                        bgp->vrf_id == VRF_UNKNOWN ? -1 : (int)bgp->vrf_id,
                        bgp->inst_type == BGP_INSTANCE_TYPE_DEFAULT ? "Default"
                                                                    : bgp->name,
                        table->version, inet_ntoa(bgp->router_id));
                *json_header_depth = 2;
                if (rd) {
                        vty_out(vty, " \"routeDistinguishers\" : {");
                        ++*json_header_depth;
                }
                json_paths = json_object_new_object();
        }

        if (use_json && rd) {
                vty_out(vty, " \"%s\" : { ", rd);
        }

        /* Start processing of routes. */
        for (rn = bgp_table_top(table); rn; rn = bgp_route_next(rn)) {
                if (rn->info == NULL)
                        continue;

                display = 0;
                if (use_json)
                        json_paths = json_object_new_array();
                else
                        json_paths = NULL;

                for (ri = rn->info; ri; ri = ri->next) {
                        total_count++;
                        if (type == bgp_show_type_flap_statistics
                            || type == bgp_show_type_flap_neighbor
                            || type == bgp_show_type_dampend_paths
                            || type == bgp_show_type_damp_neighbor) {
                                if (!(ri->extra && ri->extra->damp_info))
                                        continue;
                        }
                        if (type == bgp_show_type_regexp) {
                                regex_t *regex = output_arg;

                                if (bgp_regexec(regex, ri->attr->aspath)
                                    == REG_NOMATCH)
                                        continue;
                        }
                        if (type == bgp_show_type_prefix_list) {
                                struct prefix_list *plist = output_arg;

                                if (prefix_list_apply(plist, &rn->p)
                                    != PREFIX_PERMIT)
                                        continue;
                        }
                        if (type == bgp_show_type_filter_list) {
                                struct as_list *as_list = output_arg;

                                if (as_list_apply(as_list, ri->attr->aspath)
                                    != AS_FILTER_PERMIT)
                                        continue;
                        }
                        if (type == bgp_show_type_route_map) {
                                struct route_map *rmap = output_arg;
                                struct bgp_info binfo;
                                struct attr dummy_attr;
                                int ret;

                                bgp_attr_dup(&dummy_attr, ri->attr);

                                binfo.peer = ri->peer;
                                binfo.attr = &dummy_attr;

                                ret = route_map_apply(rmap, &rn->p, RMAP_BGP,
                                                      &binfo);
                                if (ret == RMAP_DENYMATCH)
                                        continue;
                        }
                        if (type == bgp_show_type_neighbor
                            || type == bgp_show_type_flap_neighbor
                            || type == bgp_show_type_damp_neighbor) {
                                union sockunion *su = output_arg;

                                if (ri->peer == NULL
                                    || ri->peer->su_remote == NULL
                                    || !sockunion_same(ri->peer->su_remote, su))
                                        continue;
                        }
                        if (type == bgp_show_type_cidr_only) {
                                uint32_t destination;

                                destination = ntohl(rn->p.u.prefix4.s_addr);
                                if (IN_CLASSC(destination)
                                    && rn->p.prefixlen == 24)
                                        continue;
                                if (IN_CLASSB(destination)
                                    && rn->p.prefixlen == 16)
                                        continue;
                                if (IN_CLASSA(destination)
                                    && rn->p.prefixlen == 8)
                                        continue;
                        }
                        if (type == bgp_show_type_prefix_longer) {
                                struct prefix *p = output_arg;

                                if (!prefix_match(p, &rn->p))
                                        continue;
                        }
                        if (type == bgp_show_type_community_all) {
                                if (!ri->attr->community)
                                        continue;
                        }
                        if (type == bgp_show_type_community) {
                                struct community *com = output_arg;

                                if (!ri->attr->community
                                    || !community_match(ri->attr->community,
                                                        com))
                                        continue;
                        }
                        if (type == bgp_show_type_community_exact) {
                                struct community *com = output_arg;

                                if (!ri->attr->community
                                    || !community_cmp(ri->attr->community, com))
                                        continue;
                        }
                        if (type == bgp_show_type_community_list) {
                                struct community_list *list = output_arg;

                                if (!community_list_match(ri->attr->community,
                                                          list))
                                        continue;
                        }
                        if (type == bgp_show_type_community_list_exact) {
                                struct community_list *list = output_arg;

                                if (!community_list_exact_match(
                                            ri->attr->community, list))
                                        continue;
                        }
                        if (type == bgp_show_type_lcommunity) {
                                struct lcommunity *lcom = output_arg;

                                if (!ri->attr->lcommunity
                                    || !lcommunity_match(ri->attr->lcommunity,
                                                         lcom))
                                        continue;
                        }
                        if (type == bgp_show_type_lcommunity_list) {
                                struct community_list *list = output_arg;

                                if (!lcommunity_list_match(ri->attr->lcommunity,
                                                           list))
                                        continue;
                        }
                        if (type == bgp_show_type_lcommunity_all) {
                                if (!ri->attr->lcommunity)
                                        continue;
                        }
                        if (type == bgp_show_type_dampend_paths
                            || type == bgp_show_type_damp_neighbor) {
                                if (!CHECK_FLAG(ri->flags, BGP_INFO_DAMPED)
                                    || CHECK_FLAG(ri->flags, BGP_INFO_HISTORY))
                                        continue;
                        }

                        if (!use_json && header) {
                                vty_out(vty, "BGP table version is %" PRIu64
                                             ", local router ID is %s\n",
                                        table->version,
                                        inet_ntoa(bgp->router_id));
                                vty_out(vty, BGP_SHOW_SCODE_HEADER);
                                vty_out(vty, BGP_SHOW_OCODE_HEADER);
                                if (type == bgp_show_type_dampend_paths
                                    || type == bgp_show_type_damp_neighbor)
                                        vty_out(vty, BGP_SHOW_DAMP_HEADER);
                                else if (type == bgp_show_type_flap_statistics
                                         || type == bgp_show_type_flap_neighbor)
                                        vty_out(vty, BGP_SHOW_FLAP_HEADER);
                                else
                                        vty_out(vty, BGP_SHOW_HEADER);
                                header = 0;
                        }
                        if (rd != NULL && !display && !output_count) {
                                if (!use_json)
                                        vty_out(vty,
                                                "Route Distinguisher: %s\n",
                                                rd);
                        }
                        if (type == bgp_show_type_dampend_paths
                            || type == bgp_show_type_damp_neighbor)
                                damp_route_vty_out(vty, &rn->p, ri, display,
                                                   safi, use_json, json_paths);
                        else if (type == bgp_show_type_flap_statistics
                                 || type == bgp_show_type_flap_neighbor)
                                flap_route_vty_out(vty, &rn->p, ri, display,
                                                   safi, use_json, json_paths);
                        else
                                route_vty_out(vty, &rn->p, ri, display, safi,
                                              json_paths);
                        display++;
                }

                if (display) {
                        output_count++;
                        if (!use_json)
                                continue;

                        p = &rn->p;
                        sprintf(buf2, "%s/%d",
                                inet_ntop(p->family, &p->u.prefix, buf, BUFSIZ),
                                p->prefixlen);
                        if (first)
                                vty_out(vty, "\"%s\": ", buf2);
                        else
                                vty_out(vty, ",\"%s\": ", buf2);

                        vty_out(vty, "%s",
                                json_object_to_json_string(json_paths));
                        json_object_free(json_paths);
                        json_paths = NULL;
                        first = 0;
                }
        }

        if (output_cum) {
                output_count += *output_cum;
                *output_cum = output_count;
        }
        if (total_cum) {
                total_count += *total_cum;
                *total_cum = total_count;
        }
        if (use_json) {
                if (json_paths)
                        json_object_free(json_paths);
                if (rd) {
                        vty_out(vty, " }%s ", (is_last ? "" : ","));
                }
                if (is_last) {
                        unsigned long i;
                        for (i = 0; i < *json_header_depth; ++i)
                                vty_out(vty, " } ");
                }
        } else {
                if (is_last) {
                        /* No route is displayed */
                        if (output_count == 0) {
                                if (type == bgp_show_type_normal)
                                        vty_out(vty,
                                                "No BGP prefixes displayed, %ld exist\n",
                                                total_count);
                        } else
                                vty_out(vty,
                                        "\nDisplayed  %ld routes and %ld total paths\n",
                                        output_count, total_count);
                }
        }

        return CMD_SUCCESS;
}

int bgp_show_table_rd(struct vty *vty, struct bgp *bgp, safi_t safi,
                      struct bgp_table *table, struct prefix_rd *prd_match,
                      enum bgp_show_type type, void *output_arg,
                      uint8_t use_json)
{
        struct bgp_node *rn, *next;
        unsigned long output_cum = 0;
        unsigned long total_cum = 0;
        unsigned long json_header_depth = 0;
        bool show_msg;

        show_msg = (!use_json && type == bgp_show_type_normal);

        for (rn = bgp_table_top(table); rn; rn = next) {
                next = bgp_route_next(rn);
                if (prd_match && memcmp(rn->p.u.val, prd_match->val, 8) != 0)
                        continue;
                if (rn->info != NULL) {
                        struct prefix_rd prd;
                        char rd[RD_ADDRSTRLEN];

                        memcpy(&prd, &(rn->p), sizeof(struct prefix_rd));
                        prefix_rd2str(&prd, rd, sizeof(rd));
                        bgp_show_table(vty, bgp, safi, rn->info, type,
                                       output_arg, use_json, rd, next == NULL,
                                       &output_cum, &total_cum,
                                       &json_header_depth);
                        if (next == NULL)
                                show_msg = false;
                }
        }
        if (show_msg) {
                if (output_cum == 0)
                        vty_out(vty, "No BGP prefixes displayed, %ld exist\n",
                                total_cum);
                else
                        vty_out(vty,
                                "\nDisplayed  %ld routes and %ld total paths\n",
                                output_cum, total_cum);
        }
        return CMD_SUCCESS;
}
static int bgp_show(struct vty *vty, struct bgp *bgp, afi_t afi, safi_t safi,
                    enum bgp_show_type type, void *output_arg, uint8_t use_json)
{
        struct bgp_table *table;
        unsigned long json_header_depth = 0;

        if (bgp == NULL) {
                bgp = bgp_get_default();
        }

        if (bgp == NULL) {
                if (!use_json)
                        vty_out(vty, "No BGP process is configured\n");
                else
                        vty_out(vty, "{}\n");
                return CMD_WARNING;
        }

        table = bgp->rib[afi][safi];
        /* use MPLS and ENCAP specific shows until they are merged */
        if (safi == SAFI_MPLS_VPN) {
                return bgp_show_table_rd(vty, bgp, safi, table, NULL, type,
                                         output_arg, use_json);
        }
        /* labeled-unicast routes live in the unicast table */
        else if (safi == SAFI_LABELED_UNICAST)
                safi = SAFI_UNICAST;

        return bgp_show_table(vty, bgp, safi, table, type, output_arg, use_json,
                              NULL, 1, NULL, NULL, &json_header_depth);
}

static void bgp_show_all_instances_routes_vty(struct vty *vty, afi_t afi,
                                              safi_t safi, uint8_t use_json)
{
        struct listnode *node, *nnode;
        struct bgp *bgp;
        int is_first = 1;

        if (use_json)
                vty_out(vty, "{\n");

        for (ALL_LIST_ELEMENTS(bm->bgp, node, nnode, bgp)) {
                if (use_json) {
                        if (!is_first)
                                vty_out(vty, ",\n");
                        else
                                is_first = 0;

                        vty_out(vty, "\"%s\":",
                                (bgp->inst_type == BGP_INSTANCE_TYPE_DEFAULT)
                                        ? "Default"
                                        : bgp->name);
                } else {
                        vty_out(vty, "\nInstance %s:\n",
                                (bgp->inst_type == BGP_INSTANCE_TYPE_DEFAULT)
                                        ? "Default"
                                        : bgp->name);
                }
                bgp_show(vty, bgp, afi, safi, bgp_show_type_normal, NULL,
                         use_json);
        }

        if (use_json)
                vty_out(vty, "}\n");
}

/* Header of detailed BGP route information */
void route_vty_out_detail_header(struct vty *vty, struct bgp *bgp,
                                 struct bgp_node *rn, struct prefix_rd *prd,
                                 afi_t afi, safi_t safi, json_object *json)
{
        struct bgp_info *ri;
        struct prefix *p;
        struct peer *peer;
        struct listnode *node, *nnode;
        char buf1[RD_ADDRSTRLEN];
        char buf2[INET6_ADDRSTRLEN];
#if defined(HAVE_CUMULUS)
        char buf3[EVPN_ROUTE_STRLEN];
#endif
        char prefix_str[BUFSIZ];
        int count = 0;
        int best = 0;
        int suppress = 0;
        int no_export = 0;
        int no_advertise = 0;
        int local_as = 0;
        int first = 1;
        int has_valid_label = 0;
        mpls_label_t label = 0;
        json_object *json_adv_to = NULL;

        p = &rn->p;
        has_valid_label = bgp_is_valid_label(&rn->local_label);

        if (has_valid_label)
                label = label_pton(&rn->local_label);

        if (json) {
                if (has_valid_label)
                        json_object_int_add(json, "localLabel", label);

                json_object_string_add(
                        json, "prefix",
                        prefix2str(p, prefix_str, sizeof(prefix_str)));
        } else {
#if defined(HAVE_CUMULUS)
                if (safi == SAFI_EVPN)
                        vty_out(vty, "BGP routing table entry for %s%s%s\n",
                                prd ? prefix_rd2str(prd, buf1, sizeof(buf1))
                                    : "",
                                prd ? ":" : "",
                                bgp_evpn_route2str((struct prefix_evpn *)p,
                                                   buf3, sizeof(buf3)));
                else
                        vty_out(vty, "BGP routing table entry for %s%s%s/%d\n",
                                ((safi == SAFI_MPLS_VPN || safi == SAFI_ENCAP)
                                         ? prefix_rd2str(prd, buf1,
                                                         sizeof(buf1))
                                         : ""),
                                safi == SAFI_MPLS_VPN ? ":" : "",
                                inet_ntop(p->family, &p->u.prefix, buf2,
                                          INET6_ADDRSTRLEN),
                                p->prefixlen);
#else
                if (p->family == AF_ETHERNET)
                        prefix2str(p, buf2, INET6_ADDRSTRLEN);
                else
                        inet_ntop(p->family, &p->u.prefix, buf2,
                                  INET6_ADDRSTRLEN);
                vty_out(vty, "BGP routing table entry for %s%s%s/%d\n",
                        ((safi == SAFI_MPLS_VPN || safi == SAFI_ENCAP
                          || safi == SAFI_EVPN)
                                 ? prefix_rd2str(prd, buf1, sizeof(buf1))
                                 : ""),
                        ((safi == SAFI_MPLS_VPN) || (safi == SAFI_EVPN)) ? ":"
                                                                         : "",
                        buf2, p->prefixlen);
#endif

                if (has_valid_label)
                        vty_out(vty, "Local label: %d\n", label);
#if defined(HAVE_CUMULUS)
                if (bgp_labeled_safi(safi) && safi != SAFI_EVPN)
#else
                if (bgp_labeled_safi(safi))
#endif
                        vty_out(vty, "not allocated\n");
        }

        for (ri = rn->info; ri; ri = ri->next) {
                count++;
                if (CHECK_FLAG(ri->flags, BGP_INFO_SELECTED)) {
                        best = count;
                        if (ri->extra && ri->extra->suppress)
                                suppress = 1;
                        if (ri->attr->community != NULL) {
                                if (community_include(ri->attr->community,
                                                      COMMUNITY_NO_ADVERTISE))
                                        no_advertise = 1;
                                if (community_include(ri->attr->community,
                                                      COMMUNITY_NO_EXPORT))
                                        no_export = 1;
                                if (community_include(ri->attr->community,
                                                      COMMUNITY_LOCAL_AS))
                                        local_as = 1;
                        }
                }
        }

        if (!json) {
                vty_out(vty, "Paths: (%d available", count);
                if (best) {
                        vty_out(vty, ", best #%d", best);
                        if (safi == SAFI_UNICAST)
                                vty_out(vty, ", table %s",
                                        (bgp->inst_type
                                         == BGP_INSTANCE_TYPE_DEFAULT)
                                                ? "Default-IP-Routing-Table"
                                                : bgp->name);
                } else
                        vty_out(vty, ", no best path");

                if (no_advertise)
                        vty_out(vty, ", not advertised to any peer");
                else if (no_export)
                        vty_out(vty, ", not advertised to EBGP peer");
                else if (local_as)
                        vty_out(vty, ", not advertised outside local AS");

                if (suppress)
                        vty_out(vty,
                                ", Advertisements suppressed by an aggregate.");
                vty_out(vty, ")\n");
        }

        /* If we are not using addpath then we can display Advertised to and
         * that will
         * show what peers we advertised the bestpath to.  If we are using
         * addpath
         * though then we must display Advertised to on a path-by-path basis. */
        if (!bgp->addpath_tx_used[afi][safi]) {
                for (ALL_LIST_ELEMENTS(bgp->peer, node, nnode, peer)) {
                        if (bgp_adj_out_lookup(peer, rn, 0)) {
                                if (json && !json_adv_to)
                                        json_adv_to = json_object_new_object();

                                route_vty_out_advertised_to(
                                        vty, peer, &first,
                                        "  Advertised to non peer-group peers:\n ",
                                        json_adv_to);
                        }
                }

                if (json) {
                        if (json_adv_to) {
                                json_object_object_add(json, "advertisedTo",
                                                       json_adv_to);
                        }
                } else {
                        if (first)
                                vty_out(vty, "  Not advertised to any peer");
                        vty_out(vty, "\n");
                }
        }
}

/* Display specified route of BGP table. */
static int bgp_show_route_in_table(struct vty *vty, struct bgp *bgp,
                                   struct bgp_table *rib, const char *ip_str,
                                   afi_t afi, safi_t safi,
                                   struct prefix_rd *prd, int prefix_check,
                                   enum bgp_path_type pathtype,
                                   uint8_t use_json)
{
        int ret;
        int header;
        int display = 0;
        struct prefix match;
        struct bgp_node *rn;
        struct bgp_node *rm;
        struct bgp_info *ri;
        struct bgp_table *table;
        json_object *json = NULL;
        json_object *json_paths = NULL;

        /* Check IP address argument. */
        ret = str2prefix(ip_str, &match);
        if (!ret) {
                vty_out(vty, "address is malformed\n");
                return CMD_WARNING;
        }

        match.family = afi2family(afi);

        if (use_json) {
                json = json_object_new_object();
                json_paths = json_object_new_array();
        }

        if (safi == SAFI_MPLS_VPN || safi == SAFI_ENCAP || safi == SAFI_EVPN) {
                for (rn = bgp_table_top(rib); rn; rn = bgp_route_next(rn)) {
                        if (prd && memcmp(rn->p.u.val, prd->val, 8) != 0)
                                continue;

                        if ((table = rn->info) == NULL)
                                continue;

                        header = 1;

                        if ((rm = bgp_node_match(table, &match)) == NULL)
                                continue;

                        if (prefix_check
                            && rm->p.prefixlen != match.prefixlen) {
                                bgp_unlock_node(rm);
                                continue;
                        }

                        for (ri = rm->info; ri; ri = ri->next) {
                                if (header) {
                                        route_vty_out_detail_header(
                                                vty, bgp, rm,
                                                (struct prefix_rd *)&rn->p,
                                                AFI_IP, safi, json);
                                        header = 0;
                                }
                                display++;

                                if (pathtype == BGP_PATH_ALL
                                    || (pathtype == BGP_PATH_BESTPATH
                                        && CHECK_FLAG(ri->flags,
                                                      BGP_INFO_SELECTED))
                                    || (pathtype == BGP_PATH_MULTIPATH
                                        && (CHECK_FLAG(ri->flags,
                                                       BGP_INFO_MULTIPATH)
                                            || CHECK_FLAG(ri->flags,
                                                          BGP_INFO_SELECTED))))
                                        route_vty_out_detail(vty, bgp, &rm->p,
                                                             ri, AFI_IP, safi,
                                                             json_paths);
                        }

                        bgp_unlock_node(rm);
                }
        } else {
                header = 1;

                if ((rn = bgp_node_match(rib, &match)) != NULL) {
                        if (!prefix_check
                            || rn->p.prefixlen == match.prefixlen) {
                                for (ri = rn->info; ri; ri = ri->next) {
                                        if (header) {
                                                route_vty_out_detail_header(
                                                        vty, bgp, rn, NULL, afi,
                                                        safi, json);
                                                header = 0;
                                        }
                                        display++;

                                        if (pathtype == BGP_PATH_ALL
                                            || (pathtype == BGP_PATH_BESTPATH
                                                && CHECK_FLAG(
                                                           ri->flags,
                                                           BGP_INFO_SELECTED))
                                            || (pathtype == BGP_PATH_MULTIPATH
                                                && (CHECK_FLAG(
                                                            ri->flags,
                                                            BGP_INFO_MULTIPATH)
                                                    || CHECK_FLAG(
                                                               ri->flags,
                                                               BGP_INFO_SELECTED))))
                                                route_vty_out_detail(
                                                        vty, bgp, &rn->p, ri,
                                                        afi, safi, json_paths);
                                }
                        }

                        bgp_unlock_node(rn);
                }
        }

        if (use_json) {
                if (display)
                        json_object_object_add(json, "paths", json_paths);

                vty_out(vty, "%s\n", json_object_to_json_string_ext(
                                             json, JSON_C_TO_STRING_PRETTY));
                json_object_free(json);
        } else {
                if (!display) {
                        vty_out(vty, "%% Network not in table\n");
                        return CMD_WARNING;
                }
        }

        return CMD_SUCCESS;
}

/* Display specified route of Main RIB */
static int bgp_show_route(struct vty *vty, struct bgp *bgp, const char *ip_str,
                          afi_t afi, safi_t safi, struct prefix_rd *prd,
                          int prefix_check, enum bgp_path_type pathtype,
                          uint8_t use_json)
{
        if (!bgp) {
                bgp = bgp_get_default();
                if (!bgp) {
                        if (!use_json)
                                vty_out(vty, "No BGP process is configured\n");
                        else
                                vty_out(vty, "{}\n");
                        return CMD_WARNING;
                }
        }

        /* labeled-unicast routes live in the unicast table */
        if (safi == SAFI_LABELED_UNICAST)
                safi = SAFI_UNICAST;

        return bgp_show_route_in_table(vty, bgp, bgp->rib[afi][safi], ip_str,
                                       afi, safi, prd, prefix_check, pathtype,
                                       use_json);
}

static int bgp_show_lcommunity(struct vty *vty, struct bgp *bgp, int argc,
                               struct cmd_token **argv, afi_t afi, safi_t safi,
                               uint8_t uj)
{
        struct lcommunity *lcom;
        struct buffer *b;
        int i;
        char *str;
        int first = 0;

        b = buffer_new(1024);
        for (i = 0; i < argc; i++) {
                if (first)
                        buffer_putc(b, ' ');
                else {
                        if (strmatch(argv[i]->text, "AA:BB:CC")) {
                                first = 1;
                                buffer_putstr(b, argv[i]->arg);
                        }
                }
        }
        buffer_putc(b, '\0');

        str = buffer_getstr(b);
        buffer_free(b);

        lcom = lcommunity_str2com(str);
        XFREE(MTYPE_TMP, str);
        if (!lcom) {
                vty_out(vty, "%% Large-community malformed\n");
                return CMD_WARNING;
        }

        return bgp_show(vty, bgp, afi, safi, bgp_show_type_lcommunity, lcom,
                        uj);
}

static int bgp_show_lcommunity_list(struct vty *vty, struct bgp *bgp,
                                    const char *lcom, afi_t afi, safi_t safi,
                                    uint8_t uj)
{
        struct community_list *list;

        list = community_list_lookup(bgp_clist, lcom,
                                     LARGE_COMMUNITY_LIST_MASTER);
        if (list == NULL) {
                vty_out(vty, "%% %s is not a valid large-community-list name\n",
                        lcom);
                return CMD_WARNING;
        }

        return bgp_show(vty, bgp, afi, safi, bgp_show_type_lcommunity_list,
                        list, uj);
}

DEFUN (show_ip_bgp_large_community_list,
       show_ip_bgp_large_community_list_cmd,
       "show [ip] bgp [<view|vrf> VIEWVRFNAME] ["BGP_AFI_CMD_STR" ["BGP_SAFI_WITH_LABEL_CMD_STR"]] large-community-list <(1-500)|WORD> [json]",
       SHOW_STR
       IP_STR
       BGP_STR
       BGP_INSTANCE_HELP_STR
       BGP_AFI_HELP_STR
       BGP_SAFI_WITH_LABEL_HELP_STR
       "Display routes matching the large-community-list\n"
       "large-community-list number\n"
       "large-community-list name\n"
       JSON_STR)
{
        char *vrf = NULL;
        afi_t afi = AFI_IP6;
        safi_t safi = SAFI_UNICAST;
        int idx = 0;

        if (argv_find(argv, argc, "ip", &idx))
                afi = AFI_IP;
        if (argv_find(argv, argc, "view", &idx)
            || argv_find(argv, argc, "vrf", &idx))
                vrf = argv[++idx]->arg;
        if (argv_find(argv, argc, "ipv4", &idx)
            || argv_find(argv, argc, "ipv6", &idx)) {
                afi = strmatch(argv[idx]->text, "ipv6") ? AFI_IP6 : AFI_IP;
                if (argv_find(argv, argc, "unicast", &idx)
                    || argv_find(argv, argc, "multicast", &idx))
                        safi = bgp_vty_safi_from_str(argv[idx]->text);
        }

        int uj = use_json(argc, argv);

        struct bgp *bgp = bgp_lookup_by_name(vrf);
        if (bgp == NULL) {
                vty_out(vty, "Can't find BGP instance %s\n", vrf);
                return CMD_WARNING;
        }

        argv_find(argv, argc, "large-community-list", &idx);
        return bgp_show_lcommunity_list(vty, bgp, argv[idx + 1]->arg, afi, safi,
                                        uj);
}
DEFUN (show_ip_bgp_large_community,
       show_ip_bgp_large_community_cmd,
       "show [ip] bgp [<view|vrf> VIEWVRFNAME] ["BGP_AFI_CMD_STR" ["BGP_SAFI_WITH_LABEL_CMD_STR"]] large-community [AA:BB:CC] [json]",
       SHOW_STR
       IP_STR
       BGP_STR
       BGP_INSTANCE_HELP_STR
       BGP_AFI_HELP_STR
       BGP_SAFI_WITH_LABEL_HELP_STR
       "Display routes matching the large-communities\n"
       "List of large-community numbers\n"
       JSON_STR)
{
        char *vrf = NULL;
        afi_t afi = AFI_IP6;
        safi_t safi = SAFI_UNICAST;
        int idx = 0;

        if (argv_find(argv, argc, "ip", &idx))
                afi = AFI_IP;
        if (argv_find(argv, argc, "view", &idx)
            || argv_find(argv, argc, "vrf", &idx))
                vrf = argv[++idx]->arg;
        if (argv_find(argv, argc, "ipv4", &idx)
            || argv_find(argv, argc, "ipv6", &idx)) {
                afi = strmatch(argv[idx]->text, "ipv6") ? AFI_IP6 : AFI_IP;
                if (argv_find(argv, argc, "unicast", &idx)
                    || argv_find(argv, argc, "multicast", &idx))
                        safi = bgp_vty_safi_from_str(argv[idx]->text);
        }

        int uj = use_json(argc, argv);

        struct bgp *bgp = bgp_lookup_by_name(vrf);
        if (bgp == NULL) {
                vty_out(vty, "Can't find BGP instance %s\n", vrf);
                return CMD_WARNING;
        }

        if (argv_find(argv, argc, "AA:BB:CC", &idx))
                return bgp_show_lcommunity(vty, bgp, argc, argv, afi, safi, uj);
        else
                return bgp_show(vty, bgp, afi, safi,
                                bgp_show_type_lcommunity_all, NULL, uj);
}

static int bgp_table_stats(struct vty *vty, struct bgp *bgp, afi_t afi,
                           safi_t safi);


/* BGP route print out function without JSON */
DEFUN (show_ip_bgp,
       show_ip_bgp_cmd,
       "show [ip] bgp [<view|vrf> VIEWVRFNAME] ["BGP_AFI_CMD_STR" ["BGP_SAFI_WITH_LABEL_CMD_STR"]]\
          <dampening <parameters>\
           |route-map WORD\
           |prefix-list WORD\
           |filter-list WORD\
           |statistics\
           |community <AA:NN|local-AS|no-advertise|no-export|graceful-shutdown> [exact-match]\
           |community-list <(1-500)|WORD> [exact-match]\
           |A.B.C.D/M longer-prefixes\
           |X:X::X:X/M longer-prefixes\
          >",
       SHOW_STR
       IP_STR
       BGP_STR
       BGP_INSTANCE_HELP_STR
       BGP_AFI_HELP_STR
       BGP_SAFI_WITH_LABEL_HELP_STR
       "Display detailed information about dampening\n"
       "Display detail of configured dampening parameters\n"
       "Display routes matching the route-map\n"
       "A route-map to match on\n"
       "Display routes conforming to the prefix-list\n"
       "Prefix-list name\n"
       "Display routes conforming to the filter-list\n"
       "Regular expression access list name\n"
       "BGP RIB advertisement statistics\n"
       "Display routes matching the communities\n"
       COMMUNITY_AANN_STR
       "Do not send outside local AS (well-known community)\n"
       "Do not advertise to any peer (well-known community)\n"
       "Do not export to next AS (well-known community)\n"
       "Graceful shutdown (well-known community)\n"
       "Exact match of the communities\n"
       "Display routes matching the community-list\n"
       "community-list number\n"
       "community-list name\n"
       "Exact match of the communities\n"
       "IPv4 prefix\n"
       "Display route and more specific routes\n"
       "IPv6 prefix\n"
       "Display route and more specific routes\n")
{
        afi_t afi = AFI_IP6;
        safi_t safi = SAFI_UNICAST;
        int exact_match = 0;
        struct bgp *bgp = NULL;
        int idx = 0;
        int idx_community_type = 0;

        bgp_vty_find_and_parse_afi_safi_bgp(vty, argv, argc, &idx, &afi, &safi,
                                            &bgp);
        if (!idx)
                return CMD_WARNING;

        if (argv_find(argv, argc, "dampening", &idx)) {
                if (argv_find(argv, argc, "parameters", &idx))
                        return bgp_show_dampening_parameters(vty, afi, safi);
        }

        if (argv_find(argv, argc, "prefix-list", &idx))
                return bgp_show_prefix_list(vty, bgp, argv[idx + 1]->arg, afi,
                                            safi, bgp_show_type_prefix_list);

        if (argv_find(argv, argc, "filter-list", &idx))
                return bgp_show_filter_list(vty, bgp, argv[idx + 1]->arg, afi,
                                            safi, bgp_show_type_filter_list);

        if (argv_find(argv, argc, "statistics", &idx))
                return bgp_table_stats(vty, bgp, afi, safi);

        if (argv_find(argv, argc, "route-map", &idx))
                return bgp_show_route_map(vty, bgp, argv[idx + 1]->arg, afi,
                                          safi, bgp_show_type_route_map);

        if (argv_find(argv, argc, "community", &idx)) {
                /* show a specific community */
                if (argv_find(argv, argc, "local-AS", &idx_community_type)
                    || argv_find(argv, argc, "no-advertise",
                                 &idx_community_type)
                    || argv_find(argv, argc, "no-export", &idx_community_type)
                    || argv_find(argv, argc, "graceful-shutdown",
                                 &idx_community_type)
                    || argv_find(argv, argc, "AA:NN", &idx_community_type)) {

                        if (argv_find(argv, argc, "exact-match", &idx))
                                exact_match = 1;
                        return bgp_show_community(vty, bgp,
                                                  argv[idx_community_type]->arg,
                                                  exact_match, afi, safi);
                }
        }

        if (argv_find(argv, argc, "community-list", &idx)) {
                const char *clist_number_or_name = argv[++idx]->arg;
                if (++idx < argc && strmatch(argv[idx]->text, "exact-match"))
                        exact_match = 1;
                return bgp_show_community_list(vty, bgp, clist_number_or_name,
                                               exact_match, afi, safi);
        }
        /* prefix-longer */
        if (argv_find(argv, argc, "A.B.C.D/M", &idx)
            || argv_find(argv, argc, "X:X::X:X/M", &idx))
                return bgp_show_prefix_longer(vty, bgp, argv[idx]->arg, afi,
                                              safi,
                                              bgp_show_type_prefix_longer);

        return CMD_WARNING;
}

/* BGP route print out function with JSON */
DEFUN (show_ip_bgp_json,
       show_ip_bgp_json_cmd,
       "show [ip] bgp [<view|vrf> VIEWVRFNAME] ["BGP_AFI_CMD_STR" ["BGP_SAFI_WITH_LABEL_CMD_STR"]]\
          [<\
             cidr-only\
             |dampening <flap-statistics|dampened-paths>\
             |community \
          >] [json]",
       SHOW_STR
       IP_STR
       BGP_STR
       BGP_INSTANCE_HELP_STR
       BGP_AFI_HELP_STR
       BGP_SAFI_WITH_LABEL_HELP_STR
       "Display only routes with non-natural netmasks\n"
       "Display detailed information about dampening\n"
       "Display flap statistics of routes\n"
       "Display paths suppressed due to dampening\n"
       "Display routes matching the communities\n"
       JSON_STR)
{
        afi_t afi = AFI_IP6;
        safi_t safi = SAFI_UNICAST;
        enum bgp_show_type sh_type = bgp_show_type_normal;
        struct bgp *bgp = NULL;
        int idx = 0;

        bgp_vty_find_and_parse_afi_safi_bgp(vty, argv, argc, &idx, &afi, &safi,
                                            &bgp);
        if (!idx)
                return CMD_WARNING;

        int uj = use_json(argc, argv);
        if (uj)
                argc--;

        if (argv_find(argv, argc, "cidr-only", &idx))
                return bgp_show(vty, bgp, afi, safi, bgp_show_type_cidr_only,
                                NULL, uj);

        if (argv_find(argv, argc, "dampening", &idx)) {
                if (argv_find(argv, argc, "dampened-paths", &idx))
                        return bgp_show(vty, bgp, afi, safi,
                                        bgp_show_type_dampend_paths, NULL, uj);
                else if (argv_find(argv, argc, "flap-statistics", &idx))
                        return bgp_show(vty, bgp, afi, safi,
                                        bgp_show_type_flap_statistics, NULL,
                                        uj);
        }

        if (argv_find(argv, argc, "community", &idx)) {
                /* show all communities */
                return bgp_show(vty, bgp, afi, safi,
                                bgp_show_type_community_all, NULL, uj);
        }
        return bgp_show(vty, bgp, afi, safi, sh_type, NULL, uj);
}

DEFUN (show_ip_bgp_route,
       show_ip_bgp_route_cmd,
       "show [ip] bgp [<view|vrf> VIEWVRFNAME] ["BGP_AFI_CMD_STR" ["BGP_SAFI_WITH_LABEL_CMD_STR"]]"
       "<A.B.C.D|A.B.C.D/M|X:X::X:X|X:X::X:X/M> [<bestpath|multipath>] [json]",
       SHOW_STR
       IP_STR
       BGP_STR
       BGP_INSTANCE_HELP_STR
       BGP_AFI_HELP_STR
       BGP_SAFI_WITH_LABEL_HELP_STR
       "Network in the BGP routing table to display\n"
       "IPv4 prefix\n"
       "Network in the BGP routing table to display\n"
       "IPv6 prefix\n"
       "Display only the bestpath\n"
       "Display only multipaths\n"
       JSON_STR)
{
        int prefix_check = 0;

        afi_t afi = AFI_IP6;
        safi_t safi = SAFI_UNICAST;
        char *prefix = NULL;
        struct bgp *bgp = NULL;
        enum bgp_path_type path_type;
        uint8_t uj = use_json(argc, argv);

        int idx = 0;

        bgp_vty_find_and_parse_afi_safi_bgp(vty, argv, argc, &idx, &afi, &safi,
                                            &bgp);
        if (!idx)
                return CMD_WARNING;

        if (!bgp) {
                vty_out(vty,
                        "Specified 'all' vrf's but this command currently only works per view/vrf\n");
                return CMD_WARNING;
        }

        /* <A.B.C.D|A.B.C.D/M|X:X::X:X|X:X::X:X/M> */
        if (argv_find(argv, argc, "A.B.C.D", &idx)
            || argv_find(argv, argc, "X:X::X:X", &idx))
                prefix_check = 0;
        else if (argv_find(argv, argc, "A.B.C.D/M", &idx)
                 || argv_find(argv, argc, "X:X::X:X/M", &idx))
                prefix_check = 1;

        if ((argv[idx]->type == IPV6_TKN || argv[idx]->type == IPV6_PREFIX_TKN)
            && afi != AFI_IP6) {
                vty_out(vty,
                        "%% Cannot specify IPv6 address or prefix with IPv4 AFI\n");
                return CMD_WARNING;
        }
        if ((argv[idx]->type == IPV4_TKN || argv[idx]->type == IPV4_PREFIX_TKN)
            && afi != AFI_IP) {
                vty_out(vty,
                        "%% Cannot specify IPv4 address or prefix with IPv6 AFI\n");
                return CMD_WARNING;
        }

        prefix = argv[idx]->arg;

        /* [<bestpath|multipath>] */
        if (argv_find(argv, argc, "bestpath", &idx))
                path_type = BGP_PATH_BESTPATH;
        else if (argv_find(argv, argc, "multipath", &idx))
                path_type = BGP_PATH_MULTIPATH;
        else
                path_type = BGP_PATH_ALL;

        return bgp_show_route(vty, bgp, prefix, afi, safi, NULL, prefix_check,
                              path_type, uj);
}

DEFUN (show_ip_bgp_regexp,
       show_ip_bgp_regexp_cmd,
       "show [ip] bgp [<view|vrf> VIEWVRFNAME] ["BGP_AFI_CMD_STR" ["BGP_SAFI_WITH_LABEL_CMD_STR"]] regexp REGEX...",
       SHOW_STR
       IP_STR
       BGP_STR
       BGP_INSTANCE_HELP_STR
       BGP_AFI_HELP_STR
       BGP_SAFI_WITH_LABEL_HELP_STR
       "Display routes matching the AS path regular expression\n"
       "A regular-expression to match the BGP AS paths\n")
{
        afi_t afi = AFI_IP6;
        safi_t safi = SAFI_UNICAST;
        struct bgp *bgp = NULL;

        int idx = 0;
        bgp_vty_find_and_parse_afi_safi_bgp(vty, argv, argc, &idx, &afi, &safi,
                                            &bgp);
        if (!idx)
                return CMD_WARNING;

        // get index of regex
        argv_find(argv, argc, "regexp", &idx);
        idx++;

        char *regstr = argv_concat(argv, argc, idx);
        int rc = bgp_show_regexp(vty, bgp, (const char *)regstr, afi, safi,
                                 bgp_show_type_regexp);
        XFREE(MTYPE_TMP, regstr);
        return rc;
}

DEFUN (show_ip_bgp_instance_all,
       show_ip_bgp_instance_all_cmd,
       "show [ip] bgp <view|vrf> all ["BGP_AFI_CMD_STR" ["BGP_SAFI_WITH_LABEL_CMD_STR"]] [json]",
       SHOW_STR
       IP_STR
       BGP_STR
       BGP_INSTANCE_ALL_HELP_STR
       BGP_AFI_HELP_STR
       BGP_SAFI_WITH_LABEL_HELP_STR
       JSON_STR)
{
        afi_t afi = AFI_IP;
        safi_t safi = SAFI_UNICAST;
        struct bgp *bgp = NULL;

        int idx = 0;
        bgp_vty_find_and_parse_afi_safi_bgp(vty, argv, argc, &idx, &afi, &safi,
                                            &bgp);
        if (!idx)
                return CMD_WARNING;

        int uj = use_json(argc, argv);
        if (uj)
                argc--;

        bgp_show_all_instances_routes_vty(vty, afi, safi, uj);
        return CMD_SUCCESS;
}

static int bgp_show_regexp(struct vty *vty, struct bgp *bgp, const char *regstr,
                           afi_t afi, safi_t safi, enum bgp_show_type type)
{
        regex_t *regex;
        int rc;

        regex = bgp_regcomp(regstr);
        if (!regex) {
                vty_out(vty, "Can't compile regexp %s\n", regstr);
                return CMD_WARNING;
        }

        rc = bgp_show(vty, bgp, afi, safi, type, regex, 0);
        bgp_regex_free(regex);
        return rc;
}

static int bgp_show_prefix_list(struct vty *vty, struct bgp *bgp,
                                const char *prefix_list_str, afi_t afi,
                                safi_t safi, enum bgp_show_type type)
{
        struct prefix_list *plist;

        plist = prefix_list_lookup(afi, prefix_list_str);
        if (plist == NULL) {
                vty_out(vty, "%% %s is not a valid prefix-list name\n",
                        prefix_list_str);
                return CMD_WARNING;
        }

        return bgp_show(vty, bgp, afi, safi, type, plist, 0);
}

static int bgp_show_filter_list(struct vty *vty, struct bgp *bgp,
                                const char *filter, afi_t afi, safi_t safi,
                                enum bgp_show_type type)
{
        struct as_list *as_list;

        as_list = as_list_lookup(filter);
        if (as_list == NULL) {
                vty_out(vty, "%% %s is not a valid AS-path access-list name\n",
                        filter);
                return CMD_WARNING;
        }

        return bgp_show(vty, bgp, afi, safi, type, as_list, 0);
}

static int bgp_show_route_map(struct vty *vty, struct bgp *bgp,
                              const char *rmap_str, afi_t afi, safi_t safi,
                              enum bgp_show_type type)
{
        struct route_map *rmap;

        rmap = route_map_lookup_by_name(rmap_str);
        if (!rmap) {
                vty_out(vty, "%% %s is not a valid route-map name\n", rmap_str);
                return CMD_WARNING;
        }

        return bgp_show(vty, bgp, afi, safi, type, rmap, 0);
}

static int bgp_show_community(struct vty *vty, struct bgp *bgp,
                              const char *comstr, int exact, afi_t afi,
                              safi_t safi)
{
        struct community *com;
        int ret = 0;

        com = community_str2com(comstr);
        if (!com) {
                vty_out(vty, "%% Community malformed: %s\n", comstr);
                return CMD_WARNING;
        }

        ret = bgp_show(vty, bgp, afi, safi,
                       (exact ? bgp_show_type_community_exact
                              : bgp_show_type_community),
                       com, 0);
        community_free(com);

        return ret;
}

static int bgp_show_community_list(struct vty *vty, struct bgp *bgp,
                                   const char *com, int exact, afi_t afi,
                                   safi_t safi)
{
        struct community_list *list;

        list = community_list_lookup(bgp_clist, com, COMMUNITY_LIST_MASTER);
        if (list == NULL) {
                vty_out(vty, "%% %s is not a valid community-list name\n", com);
                return CMD_WARNING;
        }

        return bgp_show(vty, bgp, afi, safi,
                        (exact ? bgp_show_type_community_list_exact
                               : bgp_show_type_community_list),
                        list, 0);
}

static int bgp_show_prefix_longer(struct vty *vty, struct bgp *bgp,
                                  const char *prefix, afi_t afi, safi_t safi,
                                  enum bgp_show_type type)
{
        int ret;
        struct prefix *p;

        p = prefix_new();

        ret = str2prefix(prefix, p);
        if (!ret) {
                vty_out(vty, "%% Malformed Prefix\n");
                return CMD_WARNING;
        }

        ret = bgp_show(vty, bgp, afi, safi, type, p, 0);
        prefix_free(p);
        return ret;
}

static struct peer *peer_lookup_in_view(struct vty *vty, struct bgp *bgp,
                                        const char *ip_str, uint8_t use_json)
{
        int ret;
        struct peer *peer;
        union sockunion su;

        /* Get peer sockunion. */
        ret = str2sockunion(ip_str, &su);
        if (ret < 0) {
                peer = peer_lookup_by_conf_if(bgp, ip_str);
                if (!peer) {
                        peer = peer_lookup_by_hostname(bgp, ip_str);

                        if (!peer) {
                                if (use_json) {
                                        json_object *json_no = NULL;
                                        json_no = json_object_new_object();
                                        json_object_string_add(
                                                json_no,
                                                "malformedAddressOrName",
                                                ip_str);
                                        vty_out(vty, "%s\n",
                                                json_object_to_json_string_ext(
                                                        json_no,
                                                        JSON_C_TO_STRING_PRETTY));
                                        json_object_free(json_no);
                                } else
                                        vty_out(vty,
                                                "%% Malformed address or name: %s\n",
                                                ip_str);
                                return NULL;
                        }
                }
                return peer;
        }

        /* Peer structure lookup. */
        peer = peer_lookup(bgp, &su);
        if (!peer) {
                if (use_json) {
                        json_object *json_no = NULL;
                        json_no = json_object_new_object();
                        json_object_string_add(json_no, "warning",
                                               "No such neighbor");
                        vty_out(vty, "%s\n",
                                json_object_to_json_string_ext(
                                        json_no, JSON_C_TO_STRING_PRETTY));
                        json_object_free(json_no);
                } else
                        vty_out(vty, "No such neighbor\n");
                return NULL;
        }

        return peer;
}

enum bgp_stats {
        BGP_STATS_MAXBITLEN = 0,
        BGP_STATS_RIB,
        BGP_STATS_PREFIXES,
        BGP_STATS_TOTPLEN,
        BGP_STATS_UNAGGREGATEABLE,
        BGP_STATS_MAX_AGGREGATEABLE,
        BGP_STATS_AGGREGATES,
        BGP_STATS_SPACE,
        BGP_STATS_ASPATH_COUNT,
        BGP_STATS_ASPATH_MAXHOPS,
        BGP_STATS_ASPATH_TOTHOPS,
        BGP_STATS_ASPATH_MAXSIZE,
        BGP_STATS_ASPATH_TOTSIZE,
        BGP_STATS_ASN_HIGHEST,
        BGP_STATS_MAX,
};

static const char *table_stats_strs[] = {
                [BGP_STATS_PREFIXES] = "Total Prefixes",
                [BGP_STATS_TOTPLEN] = "Average prefix length",
                [BGP_STATS_RIB] = "Total Advertisements",
                [BGP_STATS_UNAGGREGATEABLE] = "Unaggregateable prefixes",
                [BGP_STATS_MAX_AGGREGATEABLE] =
                        "Maximum aggregateable prefixes",
                [BGP_STATS_AGGREGATES] = "BGP Aggregate advertisements",
                [BGP_STATS_SPACE] = "Address space advertised",
                [BGP_STATS_ASPATH_COUNT] = "Advertisements with paths",
                [BGP_STATS_ASPATH_MAXHOPS] = "Longest AS-Path (hops)",
                [BGP_STATS_ASPATH_MAXSIZE] = "Largest AS-Path (bytes)",
                [BGP_STATS_ASPATH_TOTHOPS] = "Average AS-Path length (hops)",
                [BGP_STATS_ASPATH_TOTSIZE] = "Average AS-Path size (bytes)",
                [BGP_STATS_ASN_HIGHEST] = "Highest public ASN",
                [BGP_STATS_MAX] = NULL,
};

struct bgp_table_stats {
        struct bgp_table *table;
        unsigned long long counts[BGP_STATS_MAX];
        double total_space;
};

#if 0
#define TALLY_SIGFIG 100000
static unsigned long
ravg_tally (unsigned long count, unsigned long oldavg, unsigned long newval)
{
  unsigned long newtot = (count-1) * oldavg + (newval * TALLY_SIGFIG);
  unsigned long res = (newtot * TALLY_SIGFIG) / count;
  unsigned long ret = newtot / count;
  
  if ((res % TALLY_SIGFIG) > (TALLY_SIGFIG/2))
    return ret + 1;
  else
    return ret;
}
#endif

static int bgp_table_stats_walker(struct thread *t)
{
        struct bgp_node *rn;
        struct bgp_node *top;
        struct bgp_table_stats *ts = THREAD_ARG(t);
        unsigned int space = 0;

        if (!(top = bgp_table_top(ts->table)))
                return 0;

        switch (top->p.family) {
        case AF_INET:
                space = IPV4_MAX_BITLEN;
                break;
        case AF_INET6:
                space = IPV6_MAX_BITLEN;
                break;
        }

        ts->counts[BGP_STATS_MAXBITLEN] = space;

        for (rn = top; rn; rn = bgp_route_next(rn)) {
                struct bgp_info *ri;
                struct bgp_node *prn = bgp_node_parent_nolock(rn);
                unsigned int rinum = 0;

                if (rn == top)
                        continue;

                if (!rn->info)
                        continue;

                ts->counts[BGP_STATS_PREFIXES]++;
                ts->counts[BGP_STATS_TOTPLEN] += rn->p.prefixlen;

#if 0
      ts->counts[BGP_STATS_AVGPLEN]
        = ravg_tally (ts->counts[BGP_STATS_PREFIXES],
                      ts->counts[BGP_STATS_AVGPLEN],
                      rn->p.prefixlen);
#endif

                /* check if the prefix is included by any other announcements */
                while (prn && !prn->info)
                        prn = bgp_node_parent_nolock(prn);

                if (prn == NULL || prn == top) {
                        ts->counts[BGP_STATS_UNAGGREGATEABLE]++;
                        /* announced address space */
                        if (space)
                                ts->total_space +=
                                        pow(2.0, space - rn->p.prefixlen);
                } else if (prn->info)
                        ts->counts[BGP_STATS_MAX_AGGREGATEABLE]++;

                for (ri = rn->info; ri; ri = ri->next) {
                        rinum++;
                        ts->counts[BGP_STATS_RIB]++;

                        if (ri->attr
                            && (CHECK_FLAG(ri->attr->flag,
                                           ATTR_FLAG_BIT(
                                                   BGP_ATTR_ATOMIC_AGGREGATE))))
                                ts->counts[BGP_STATS_AGGREGATES]++;

                        /* as-path stats */
                        if (ri->attr && ri->attr->aspath) {
                                unsigned int hops =
                                        aspath_count_hops(ri->attr->aspath);
                                unsigned int size =
                                        aspath_size(ri->attr->aspath);
                                as_t highest = aspath_highest(ri->attr->aspath);

                                ts->counts[BGP_STATS_ASPATH_COUNT]++;

                                if (hops > ts->counts[BGP_STATS_ASPATH_MAXHOPS])
                                        ts->counts[BGP_STATS_ASPATH_MAXHOPS] =
                                                hops;

                                if (size > ts->counts[BGP_STATS_ASPATH_MAXSIZE])
                                        ts->counts[BGP_STATS_ASPATH_MAXSIZE] =
                                                size;

                                ts->counts[BGP_STATS_ASPATH_TOTHOPS] += hops;
                                ts->counts[BGP_STATS_ASPATH_TOTSIZE] += size;
#if 0
              ts->counts[BGP_STATS_ASPATH_AVGHOPS] 
                = ravg_tally (ts->counts[BGP_STATS_ASPATH_COUNT],
                              ts->counts[BGP_STATS_ASPATH_AVGHOPS],
                              hops);
              ts->counts[BGP_STATS_ASPATH_AVGSIZE]
                = ravg_tally (ts->counts[BGP_STATS_ASPATH_COUNT],
                              ts->counts[BGP_STATS_ASPATH_AVGSIZE],
                              size);
#endif
                                if (highest > ts->counts[BGP_STATS_ASN_HIGHEST])
                                        ts->counts[BGP_STATS_ASN_HIGHEST] =
                                                highest;
                        }
                }
        }
        return 0;
}

static int bgp_table_stats(struct vty *vty, struct bgp *bgp, afi_t afi,
                           safi_t safi)
{
        struct bgp_table_stats ts;
        unsigned int i;

        if (!bgp->rib[afi][safi]) {
                vty_out(vty, "%% No RIB exist's for the AFI(%d)/SAFI(%d)\n",
                        afi, safi);
                return CMD_WARNING;
        }

        vty_out(vty, "BGP %s RIB statistics\n", afi_safi_print(afi, safi));

        /* labeled-unicast routes live in the unicast table */
        if (safi == SAFI_LABELED_UNICAST)
                safi = SAFI_UNICAST;

        memset(&ts, 0, sizeof(ts));
        ts.table = bgp->rib[afi][safi];
        thread_execute(bm->master, bgp_table_stats_walker, &ts, 0);

        for (i = 0; i < BGP_STATS_MAX; i++) {
                if (!table_stats_strs[i])
                        continue;

                switch (i) {
#if 0
          case BGP_STATS_ASPATH_AVGHOPS:
          case BGP_STATS_ASPATH_AVGSIZE:
          case BGP_STATS_AVGPLEN:
            vty_out (vty, "%-30s: ", table_stats_strs[i]);
            vty_out (vty, "%12.2f",
                     (float)ts.counts[i] / (float)TALLY_SIGFIG);
            break;
#endif
                case BGP_STATS_ASPATH_TOTHOPS:
                case BGP_STATS_ASPATH_TOTSIZE:
                        vty_out(vty, "%-30s: ", table_stats_strs[i]);
                        vty_out(vty, "%12.2f",
                                ts.counts[i]
                                        ? (float)ts.counts[i]
                                                  / (float)ts.counts
                                                            [BGP_STATS_ASPATH_COUNT]
                                        : 0);
                        break;
                case BGP_STATS_TOTPLEN:
                        vty_out(vty, "%-30s: ", table_stats_strs[i]);
                        vty_out(vty, "%12.2f",
                                ts.counts[i]
                                        ? (float)ts.counts[i]
                                                  / (float)ts.counts
                                                            [BGP_STATS_PREFIXES]
                                        : 0);
                        break;
                case BGP_STATS_SPACE:
                        vty_out(vty, "%-30s: ", table_stats_strs[i]);
                        vty_out(vty, "%12g\n", ts.total_space);

                        if (afi == AFI_IP6) {
                                vty_out(vty, "%30s: ", "/32 equivalent ");
                                vty_out(vty, "%12g\n",
                                        ts.total_space * pow(2.0, -128 + 32));
                                vty_out(vty, "%30s: ", "/48 equivalent ");
                                vty_out(vty, "%12g\n",
                                        ts.total_space * pow(2.0, -128 + 48));
                        } else {
                                vty_out(vty, "%30s: ", "% announced ");
                                vty_out(vty, "%12.2f\n",
                                        ts.total_space * 100. * pow(2.0, -32));
                                vty_out(vty, "%30s: ", "/8 equivalent ");
                                vty_out(vty, "%12.2f\n",
                                        ts.total_space * pow(2.0, -32 + 8));
                                vty_out(vty, "%30s: ", "/24 equivalent ");
                                vty_out(vty, "%12.2f\n",
                                        ts.total_space * pow(2.0, -32 + 24));
                        }
                        break;
                default:
                        vty_out(vty, "%-30s: ", table_stats_strs[i]);
                        vty_out(vty, "%12llu", ts.counts[i]);
                }

                vty_out(vty, "\n");
        }
        return CMD_SUCCESS;
}

enum bgp_pcounts {
        PCOUNT_ADJ_IN = 0,
        PCOUNT_DAMPED,
        PCOUNT_REMOVED,
        PCOUNT_HISTORY,
        PCOUNT_STALE,
        PCOUNT_VALID,
        PCOUNT_ALL,
        PCOUNT_COUNTED,
        PCOUNT_PFCNT, /* the figure we display to users */
        PCOUNT_MAX,
};

static const char *pcount_strs[] = {
                [PCOUNT_ADJ_IN] = "Adj-in",
                [PCOUNT_DAMPED] = "Damped",
                [PCOUNT_REMOVED] = "Removed",
                [PCOUNT_HISTORY] = "History",
                [PCOUNT_STALE] = "Stale",
                [PCOUNT_VALID] = "Valid",
                [PCOUNT_ALL] = "All RIB",
                [PCOUNT_COUNTED] = "PfxCt counted",
                [PCOUNT_PFCNT] = "Useable",
                [PCOUNT_MAX] = NULL,
};

struct peer_pcounts {
        unsigned int count[PCOUNT_MAX];
        const struct peer *peer;
        const struct bgp_table *table;
};

static int bgp_peer_count_walker(struct thread *t)
{
        struct bgp_node *rn;
        struct peer_pcounts *pc = THREAD_ARG(t);
        const struct peer *peer = pc->peer;

        for (rn = bgp_table_top(pc->table); rn; rn = bgp_route_next(rn)) {
                struct bgp_adj_in *ain;
                struct bgp_info *ri;

                for (ain = rn->adj_in; ain; ain = ain->next)
                        if (ain->peer == peer)
                                pc->count[PCOUNT_ADJ_IN]++;

                for (ri = rn->info; ri; ri = ri->next) {
                        char buf[SU_ADDRSTRLEN];

                        if (ri->peer != peer)
                                continue;

                        pc->count[PCOUNT_ALL]++;

                        if (CHECK_FLAG(ri->flags, BGP_INFO_DAMPED))
                                pc->count[PCOUNT_DAMPED]++;
                        if (CHECK_FLAG(ri->flags, BGP_INFO_HISTORY))
                                pc->count[PCOUNT_HISTORY]++;
                        if (CHECK_FLAG(ri->flags, BGP_INFO_REMOVED))
                                pc->count[PCOUNT_REMOVED]++;
                        if (CHECK_FLAG(ri->flags, BGP_INFO_STALE))
                                pc->count[PCOUNT_STALE]++;
                        if (CHECK_FLAG(ri->flags, BGP_INFO_VALID))
                                pc->count[PCOUNT_VALID]++;
                        if (!CHECK_FLAG(ri->flags, BGP_INFO_UNUSEABLE))
                                pc->count[PCOUNT_PFCNT]++;

                        if (CHECK_FLAG(ri->flags, BGP_INFO_COUNTED)) {
                                pc->count[PCOUNT_COUNTED]++;
                                if (CHECK_FLAG(ri->flags, BGP_INFO_UNUSEABLE))
                                        zlog_warn(
                                                "%s [pcount] %s/%d is counted but flags 0x%x",
                                                peer->host,
                                                inet_ntop(rn->p.family,
                                                          &rn->p.u.prefix, buf,
                                                          SU_ADDRSTRLEN),
                                                rn->p.prefixlen, ri->flags);
                        } else {
                                if (!CHECK_FLAG(ri->flags, BGP_INFO_UNUSEABLE))
                                        zlog_warn(
                                                "%s [pcount] %s/%d not counted but flags 0x%x",
                                                peer->host,
                                                inet_ntop(rn->p.family,
                                                          &rn->p.u.prefix, buf,
                                                          SU_ADDRSTRLEN),
                                                rn->p.prefixlen, ri->flags);
                        }
                }
        }
        return 0;
}

static int bgp_peer_counts(struct vty *vty, struct peer *peer, afi_t afi,
                           safi_t safi, uint8_t use_json)
{
        struct peer_pcounts pcounts = {.peer = peer};
        unsigned int i;
        json_object *json = NULL;
        json_object *json_loop = NULL;

        if (use_json) {
                json = json_object_new_object();
                json_loop = json_object_new_object();
        }

        if (!peer || !peer->bgp || !peer->afc[afi][safi]
            || !peer->bgp->rib[afi][safi]) {
                if (use_json) {
                        json_object_string_add(
                                json, "warning",
                                "No such neighbor or address family");
                        vty_out(vty, "%s\n", json_object_to_json_string(json));
                        json_object_free(json);
                } else
                        vty_out(vty, "%% No such neighbor or address family\n");

                return CMD_WARNING;
        }

        memset(&pcounts, 0, sizeof(pcounts));
        pcounts.peer = peer;
        pcounts.table = peer->bgp->rib[afi][safi];

        /* in-place call via thread subsystem so as to record execution time
         * stats for the thread-walk (i.e. ensure this can't be blamed on
         * on just vty_read()).
         */
        thread_execute(bm->master, bgp_peer_count_walker, &pcounts, 0);

        if (use_json) {
                json_object_string_add(json, "prefixCountsFor", peer->host);
                json_object_string_add(json, "multiProtocol",
                                       afi_safi_print(afi, safi));
                json_object_int_add(json, "pfxCounter",
                                    peer->pcount[afi][safi]);

                for (i = 0; i < PCOUNT_MAX; i++)
                        json_object_int_add(json_loop, pcount_strs[i],
                                            pcounts.count[i]);

                json_object_object_add(json, "ribTableWalkCounters", json_loop);

                if (pcounts.count[PCOUNT_PFCNT] != peer->pcount[afi][safi]) {
                        json_object_string_add(json, "pfxctDriftFor",
                                               peer->host);
                        json_object_string_add(
                                json, "recommended",
                                "Please report this bug, with the above command output");
                }
                vty_out(vty, "%s\n", json_object_to_json_string_ext(
                                             json, JSON_C_TO_STRING_PRETTY));
                json_object_free(json);
        } else {

                if (peer->hostname
                    && bgp_flag_check(peer->bgp, BGP_FLAG_SHOW_HOSTNAME)) {
                        vty_out(vty, "Prefix counts for %s/%s, %s\n",
                                peer->hostname, peer->host,
                                afi_safi_print(afi, safi));
                } else {
                        vty_out(vty, "Prefix counts for %s, %s\n", peer->host,
                                afi_safi_print(afi, safi));
                }

                vty_out(vty, "PfxCt: %ld\n", peer->pcount[afi][safi]);
                vty_out(vty, "\nCounts from RIB table walk:\n\n");

                for (i = 0; i < PCOUNT_MAX; i++)
                        vty_out(vty, "%20s: %-10d\n", pcount_strs[i],
                                pcounts.count[i]);

                if (pcounts.count[PCOUNT_PFCNT] != peer->pcount[afi][safi]) {
                        vty_out(vty, "%s [pcount] PfxCt drift!\n", peer->host);
                        vty_out(vty,
                                "Please report this bug, with the above command output\n");
                }
        }

        return CMD_SUCCESS;
}

DEFUN (show_ip_bgp_instance_neighbor_prefix_counts,
       show_ip_bgp_instance_neighbor_prefix_counts_cmd,
       "show [ip] bgp [<view|vrf> VIEWVRFNAME] ["BGP_AFI_CMD_STR" ["BGP_SAFI_CMD_STR"]] "
       "neighbors <A.B.C.D|X:X::X:X|WORD> prefix-counts [json]",
       SHOW_STR
       IP_STR
       BGP_STR
       BGP_INSTANCE_HELP_STR
       BGP_AFI_HELP_STR
       BGP_SAFI_HELP_STR
       "Detailed information on TCP and BGP neighbor connections\n"
       "Neighbor to display information about\n"
       "Neighbor to display information about\n"
       "Neighbor on BGP configured interface\n"
       "Display detailed prefix count information\n"
       JSON_STR)
{
        afi_t afi = AFI_IP6;
        safi_t safi = SAFI_UNICAST;
        struct peer *peer;
        int idx = 0;
        struct bgp *bgp = NULL;

        bgp_vty_find_and_parse_afi_safi_bgp(vty, argv, argc, &idx, &afi, &safi,
                                            &bgp);
        if (!idx)
                return CMD_WARNING;

        int uj = use_json(argc, argv);
        if (uj)
                argc--;

        argv_find(argv, argc, "neighbors", &idx);
        peer = peer_lookup_in_view(vty, bgp, argv[idx + 1]->arg, uj);
        if (!peer)
                return CMD_WARNING;

        return bgp_peer_counts(vty, peer, AFI_IP, SAFI_UNICAST, uj);
}

#ifdef KEEP_OLD_VPN_COMMANDS
DEFUN (show_ip_bgp_vpn_neighbor_prefix_counts,
       show_ip_bgp_vpn_neighbor_prefix_counts_cmd,
       "show [ip] bgp <vpnv4|vpnv6> all neighbors <A.B.C.D|X:X::X:X|WORD> prefix-counts [json]",
       SHOW_STR
       IP_STR
       BGP_STR
       BGP_VPNVX_HELP_STR
       "Display information about all VPNv4 NLRIs\n"
       "Detailed information on TCP and BGP neighbor connections\n"
       "Neighbor to display information about\n"
       "Neighbor to display information about\n"
       "Neighbor on BGP configured interface\n"
       "Display detailed prefix count information\n"
       JSON_STR)
{
        int idx_peer = 6;
        struct peer *peer;
        uint8_t uj = use_json(argc, argv);

        peer = peer_lookup_in_view(vty, NULL, argv[idx_peer]->arg, uj);
        if (!peer)
                return CMD_WARNING;

        return bgp_peer_counts(vty, peer, AFI_IP, SAFI_MPLS_VPN, uj);
}

DEFUN (show_ip_bgp_vpn_all_route_prefix,
       show_ip_bgp_vpn_all_route_prefix_cmd,
       "show [ip] bgp <vpnv4|vpnv6> all <A.B.C.D|A.B.C.D/M> [json]",
       SHOW_STR
       IP_STR
       BGP_STR
       BGP_VPNVX_HELP_STR
       "Display information about all VPNv4 NLRIs\n"
       "Network in the BGP routing table to display\n"
       "Network in the BGP routing table to display\n"
       JSON_STR)
{
        int idx = 0;
        char *network = NULL;
        struct bgp *bgp = bgp_get_default();
        if (!bgp) {
                vty_out(vty, "Can't find default instance\n");
                return CMD_WARNING;
        }

        if (argv_find(argv, argc, "A.B.C.D", &idx))
                network = argv[idx]->arg;
        else if (argv_find(argv, argc, "A.B.C.D/M", &idx))
                network = argv[idx]->arg;
        else {
                vty_out(vty, "Unable to figure out Network\n");
                return CMD_WARNING;
        }

        return bgp_show_route(vty, bgp, network, AFI_IP, SAFI_MPLS_VPN, NULL, 0,
                              BGP_PATH_ALL, use_json(argc, argv));
}
#endif /* KEEP_OLD_VPN_COMMANDS */

DEFUN (show_ip_bgp_l2vpn_evpn_all_route_prefix,
       show_ip_bgp_l2vpn_evpn_all_route_prefix_cmd,
       "show [ip] bgp l2vpn evpn all <A.B.C.D|A.B.C.D/M> [json]",
       SHOW_STR
       IP_STR
       BGP_STR
       L2VPN_HELP_STR
       EVPN_HELP_STR
       "Display information about all EVPN NLRIs\n"
       "Network in the BGP routing table to display\n"
       "Network in the BGP routing table to display\n"
       JSON_STR)
{
        int idx = 0;
        char *network = NULL;

        if (argv_find(argv, argc, "A.B.C.D", &idx))
                network = argv[idx]->arg;
        else if (argv_find(argv, argc, "A.B.C.D/M", &idx))
                network = argv[idx]->arg;
        else {
                vty_out(vty, "Unable to figure out Network\n");
                return CMD_WARNING;
        }
        return bgp_show_route(vty, NULL, network, AFI_L2VPN, SAFI_EVPN, NULL, 0,
                              BGP_PATH_ALL, use_json(argc, argv));
}

static void show_adj_route(struct vty *vty, struct peer *peer, afi_t afi,
                           safi_t safi, int in, const char *rmap_name,
                           uint8_t use_json, json_object *json)
{
        struct bgp_table *table;
        struct bgp_adj_in *ain;
        struct bgp_adj_out *adj;
        unsigned long output_count;
        unsigned long filtered_count;
        struct bgp_node *rn;
        int header1 = 1;
        struct bgp *bgp;
        int header2 = 1;
        struct attr attr;
        int ret;
        struct update_subgroup *subgrp;
        json_object *json_scode = NULL;
        json_object *json_ocode = NULL;
        json_object *json_ar = NULL;
        struct peer_af *paf;

        if (use_json) {
                json_scode = json_object_new_object();
                json_ocode = json_object_new_object();
                json_ar = json_object_new_object();

                json_object_string_add(json_scode, "suppressed", "s");
                json_object_string_add(json_scode, "damped", "d");
                json_object_string_add(json_scode, "history", "h");
                json_object_string_add(json_scode, "valid", "*");
                json_object_string_add(json_scode, "best", ">");
                json_object_string_add(json_scode, "multipath", "=");
                json_object_string_add(json_scode, "internal", "i");
                json_object_string_add(json_scode, "ribFailure", "r");
                json_object_string_add(json_scode, "stale", "S");
                json_object_string_add(json_scode, "removed", "R");

                json_object_string_add(json_ocode, "igp", "i");
                json_object_string_add(json_ocode, "egp", "e");
                json_object_string_add(json_ocode, "incomplete", "?");
        }

        bgp = peer->bgp;

        if (!bgp) {
                if (use_json) {
                        json_object_string_add(json, "alert", "no BGP");
                        vty_out(vty, "%s\n", json_object_to_json_string(json));
                        json_object_free(json);
                } else
                        vty_out(vty, "%% No bgp\n");
                return;
        }

        table = bgp->rib[afi][safi];

        output_count = filtered_count = 0;
        subgrp = peer_subgroup(peer, afi, safi);

        if (!in && subgrp
            && CHECK_FLAG(subgrp->sflags, SUBGRP_STATUS_DEFAULT_ORIGINATE)) {
                if (use_json) {
                        json_object_int_add(json, "bgpTableVersion",
                                            table->version);
                        json_object_string_add(json, "bgpLocalRouterId",
                                               inet_ntoa(bgp->router_id));
                        json_object_object_add(json, "bgpStatusCodes",
                                               json_scode);
                        json_object_object_add(json, "bgpOriginCodes",
                                               json_ocode);
                        json_object_string_add(json,
                                               "bgpOriginatingDefaultNetwork",
                                               "0.0.0.0");
                } else {
                        vty_out(vty, "BGP table version is %" PRIu64
                                     ", local router ID is %s\n",
                                table->version, inet_ntoa(bgp->router_id));
                        vty_out(vty, BGP_SHOW_SCODE_HEADER);
                        vty_out(vty, BGP_SHOW_OCODE_HEADER);

                        vty_out(vty, "Originating default network 0.0.0.0\n\n");
                }
                header1 = 0;
        }

        for (rn = bgp_table_top(table); rn; rn = bgp_route_next(rn)) {
                if (in) {
                        for (ain = rn->adj_in; ain; ain = ain->next) {
                                if (ain->peer != peer)
                                        continue;
                                if (header1) {
                                        if (use_json) {
                                                json_object_int_add(
                                                        json, "bgpTableVersion",
                                                        0);
                                                json_object_string_add(
                                                        json,
                                                        "bgpLocalRouterId",
                                                        inet_ntoa(
                                                                bgp->router_id));
                                                json_object_object_add(
                                                        json, "bgpStatusCodes",
                                                        json_scode);
                                                json_object_object_add(
                                                        json, "bgpOriginCodes",
                                                        json_ocode);
                                        } else {
                                                vty_out(vty,
                                                        "BGP table version is 0, local router ID is %s\n",
                                                        inet_ntoa(
                                                                bgp->router_id));
                                                vty_out(vty,
                                                        BGP_SHOW_SCODE_HEADER);
                                                vty_out(vty,
                                                        BGP_SHOW_OCODE_HEADER);
                                        }
                                        header1 = 0;
                                }
                                if (header2) {
                                        if (!use_json)
                                                vty_out(vty, BGP_SHOW_HEADER);
                                        header2 = 0;
                                }
                                if (ain->attr) {
                                        bgp_attr_dup(&attr, ain->attr);
                                        if (bgp_input_modifier(peer, &rn->p,
                                                               &attr, afi, safi,
                                                               rmap_name)
                                            != RMAP_DENY) {
                                                route_vty_out_tmp(vty, &rn->p,
                                                                  &attr, safi,
                                                                  use_json,
                                                                  json_ar);
                                                output_count++;
                                        } else
                                                filtered_count++;
                                }
                        }
                } else {
                        for (adj = rn->adj_out; adj; adj = adj->next)
                                SUBGRP_FOREACH_PEER (adj->subgroup, paf) {
                                        if (paf->peer != peer)
                                                continue;

                                        if (header1) {
                                                if (use_json) {
                                                        json_object_int_add(
                                                                json,
                                                                "bgpTableVersion",
                                                                table->version);
                                                        json_object_string_add(
                                                                json,
                                                                "bgpLocalRouterId",
                                                                inet_ntoa(
                                                                        bgp->router_id));
                                                        json_object_object_add(
                                                                json,
                                                                "bgpStatusCodes",
                                                                json_scode);
                                                        json_object_object_add(
                                                                json,
                                                                "bgpOriginCodes",
                                                                json_ocode);
                                                } else {
                                                        vty_out(vty,
                                                                "BGP table version is %" PRIu64
                                                                ", local router ID is %s\n",
                                                                table->version,
                                                                inet_ntoa(
                                                                        bgp->router_id));
                                                        vty_out(vty,
                                                                BGP_SHOW_SCODE_HEADER);
                                                        vty_out(vty,
                                                                BGP_SHOW_OCODE_HEADER);
                                                }
                                                header1 = 0;
                                        }

                                        if (header2) {
                                                if (!use_json)
                                                        vty_out(vty,
                                                                BGP_SHOW_HEADER);
                                                header2 = 0;
                                        }

                                        if (adj->attr) {
                                                bgp_attr_dup(&attr, adj->attr);
                                                ret = bgp_output_modifier(
                                                        peer, &rn->p, &attr,
                                                        afi, safi, rmap_name);
                                                if (ret != RMAP_DENY) {
                                                        route_vty_out_tmp(
                                                                vty, &rn->p,
                                                                &attr, safi,
                                                                use_json,
                                                                json_ar);
                                                        output_count++;
                                                } else
                                                        filtered_count++;

                                                bgp_attr_undup(&attr,
                                                               adj->attr);
                                        }
                                }
                }
        }
        if (use_json)
                json_object_object_add(json, "advertisedRoutes", json_ar);

        if (output_count != 0) {
                if (use_json)
                        json_object_int_add(json, "totalPrefixCounter",
                                            output_count);
                else
                        vty_out(vty, "\nTotal number of prefixes %ld\n",
                                output_count);
        }
        if (use_json) {
                vty_out(vty, "%s\n", json_object_to_json_string_ext(
                                             json, JSON_C_TO_STRING_PRETTY));
                json_object_free(json);
        }
}

static int peer_adj_routes(struct vty *vty, struct peer *peer, afi_t afi,
                           safi_t safi, int in, const char *rmap_name,
                           uint8_t use_json)
{
        json_object *json = NULL;

        if (use_json)
                json = json_object_new_object();

        /* labeled-unicast routes live in the unicast table */
        if (safi == SAFI_LABELED_UNICAST)
                safi = SAFI_UNICAST;

        if (!peer || !peer->afc[afi][safi]) {
                if (use_json) {
                        json_object_string_add(
                                json, "warning",
                                "No such neighbor or address family");
                        vty_out(vty, "%s\n", json_object_to_json_string(json));
                        json_object_free(json);
                } else
                        vty_out(vty, "%% No such neighbor or address family\n");

                return CMD_WARNING;
        }

        if (in
            && !CHECK_FLAG(peer->af_flags[afi][safi],
                           PEER_FLAG_SOFT_RECONFIG)) {
                if (use_json) {
                        json_object_string_add(
                                json, "warning",
                                "Inbound soft reconfiguration not enabled");
                        vty_out(vty, "%s\n", json_object_to_json_string(json));
                        json_object_free(json);
                } else
                        vty_out(vty,
                                "%% Inbound soft reconfiguration not enabled\n");

                return CMD_WARNING;
        }

        show_adj_route(vty, peer, afi, safi, in, rmap_name, use_json, json);

        return CMD_SUCCESS;
}

DEFUN (show_ip_bgp_instance_neighbor_advertised_route,
       show_ip_bgp_instance_neighbor_advertised_route_cmd,
       "show [ip] bgp [<view|vrf> VIEWVRFNAME] ["BGP_AFI_CMD_STR" ["BGP_SAFI_WITH_LABEL_CMD_STR"]] "
       "neighbors <A.B.C.D|X:X::X:X|WORD> <received-routes|advertised-routes> [route-map WORD] [json]",
       SHOW_STR
       IP_STR
       BGP_STR
       BGP_INSTANCE_HELP_STR
       BGP_AFI_HELP_STR
       BGP_SAFI_WITH_LABEL_HELP_STR
       "Detailed information on TCP and BGP neighbor connections\n"
       "Neighbor to display information about\n"
       "Neighbor to display information about\n"
       "Neighbor on BGP configured interface\n"
       "Display the received routes from neighbor\n"
       "Display the routes advertised to a BGP neighbor\n"
       "Route-map to modify the attributes\n"
       "Name of the route map\n"
       JSON_STR)
{
        afi_t afi = AFI_IP6;
        safi_t safi = SAFI_UNICAST;
        char *rmap_name = NULL;
        char *peerstr = NULL;
        int rcvd = 0;
        struct bgp *bgp = NULL;
        struct peer *peer;

        int idx = 0;

        bgp_vty_find_and_parse_afi_safi_bgp(vty, argv, argc, &idx, &afi, &safi,
                                            &bgp);
        if (!idx)
                return CMD_WARNING;

        int uj = use_json(argc, argv);
        if (uj)
                argc--;

        /* neighbors <A.B.C.D|X:X::X:X|WORD> */
        argv_find(argv, argc, "neighbors", &idx);
        peerstr = argv[++idx]->arg;

        peer = peer_lookup_in_view(vty, bgp, peerstr, uj);
        if (!peer)
                return CMD_WARNING;

        if (argv_find(argv, argc, "received-routes", &idx))
                rcvd = 1;
        if (argv_find(argv, argc, "advertised-routes", &idx))
                rcvd = 0;
        if (argv_find(argv, argc, "route-map", &idx))
                rmap_name = argv[++idx]->arg;

        return peer_adj_routes(vty, peer, afi, safi, rcvd, rmap_name, uj);
}

DEFUN (show_ip_bgp_neighbor_received_prefix_filter,
       show_ip_bgp_neighbor_received_prefix_filter_cmd,
       "show [ip] bgp [<ipv4|ipv6> [unicast]] neighbors <A.B.C.D|X:X::X:X|WORD> received prefix-filter [json]",
       SHOW_STR
       IP_STR
       BGP_STR
       "Address Family\n"
       "Address Family\n"
       "Address Family modifier\n"
       "Detailed information on TCP and BGP neighbor connections\n"
       "Neighbor to display information about\n"
       "Neighbor to display information about\n"
       "Neighbor on BGP configured interface\n"
       "Display information received from a BGP neighbor\n"
       "Display the prefixlist filter\n"
       JSON_STR)
{
        afi_t afi = AFI_IP6;
        safi_t safi = SAFI_UNICAST;
        char *peerstr = NULL;

        char name[BUFSIZ];
        union sockunion su;
        struct peer *peer;
        int count, ret;

        int idx = 0;

        /* show [ip] bgp */
        if (argv_find(argv, argc, "ip", &idx))
                afi = AFI_IP;
        /* [<ipv4|ipv6> [unicast]] */
        if (argv_find(argv, argc, "ipv4", &idx))
                afi = AFI_IP;
        if (argv_find(argv, argc, "ipv6", &idx))
                afi = AFI_IP6;
        /* neighbors <A.B.C.D|X:X::X:X|WORD> */
        argv_find(argv, argc, "neighbors", &idx);
        peerstr = argv[++idx]->arg;

        uint8_t uj = use_json(argc, argv);

        ret = str2sockunion(peerstr, &su);
        if (ret < 0) {
                peer = peer_lookup_by_conf_if(NULL, peerstr);
                if (!peer) {
                        if (uj)
                                vty_out(vty, "{}\n");
                        else
                                vty_out(vty,
                                        "%% Malformed address or name: %s\n",
                                        peerstr);
                        return CMD_WARNING;
                }
        } else {
                peer = peer_lookup(NULL, &su);
                if (!peer) {
                        if (uj)
                                vty_out(vty, "{}\n");
                        else
                                vty_out(vty, "No peer\n");
                        return CMD_WARNING;
                }
        }

        sprintf(name, "%s.%d.%d", peer->host, afi, safi);
        count = prefix_bgp_show_prefix_list(NULL, afi, name, uj);
        if (count) {
                if (!uj)
                        vty_out(vty, "Address Family: %s\n",
                                afi_safi_print(afi, safi));
                prefix_bgp_show_prefix_list(vty, afi, name, uj);
        } else {
                if (uj)
                        vty_out(vty, "{}\n");
                else
                        vty_out(vty, "No functional output\n");
        }

        return CMD_SUCCESS;
}

static int bgp_show_neighbor_route(struct vty *vty, struct peer *peer,
                                   afi_t afi, safi_t safi,
                                   enum bgp_show_type type, uint8_t use_json)
{
        /* labeled-unicast routes live in the unicast table */
        if (safi == SAFI_LABELED_UNICAST)
                safi = SAFI_UNICAST;

        if (!peer || !peer->afc[afi][safi]) {
                if (use_json) {
                        json_object *json_no = NULL;
                        json_no = json_object_new_object();
                        json_object_string_add(
                                json_no, "warning",
                                "No such neighbor or address family");
                        vty_out(vty, "%s\n",
                                json_object_to_json_string(json_no));
                        json_object_free(json_no);
                } else
                        vty_out(vty, "%% No such neighbor or address family\n");
                return CMD_WARNING;
        }

        return bgp_show(vty, peer->bgp, afi, safi, type, &peer->su, use_json);
}

DEFUN (show_ip_bgp_neighbor_routes,
       show_ip_bgp_neighbor_routes_cmd,
       "show [ip] bgp [<view|vrf> VIEWVRFNAME] ["BGP_AFI_CMD_STR" ["BGP_SAFI_WITH_LABEL_CMD_STR"]] "
       "neighbors <A.B.C.D|X:X::X:X|WORD> <flap-statistics|dampened-routes|routes> [json]",
       SHOW_STR
       IP_STR
       BGP_STR
       BGP_INSTANCE_HELP_STR
       BGP_AFI_HELP_STR
       BGP_SAFI_WITH_LABEL_HELP_STR
       "Detailed information on TCP and BGP neighbor connections\n"
       "Neighbor to display information about\n"
       "Neighbor to display information about\n"
       "Neighbor on BGP configured interface\n"
       "Display flap statistics of the routes learned from neighbor\n"
       "Display the dampened routes received from neighbor\n"
       "Display routes learned from neighbor\n"
       JSON_STR)
{
        char *peerstr = NULL;
        struct bgp *bgp = NULL;
        afi_t afi = AFI_IP6;
        safi_t safi = SAFI_UNICAST;
        struct peer *peer;
        enum bgp_show_type sh_type = bgp_show_type_neighbor;

        int idx = 0;

        bgp_vty_find_and_parse_afi_safi_bgp(vty, argv, argc, &idx, &afi, &safi,
                                            &bgp);
        if (!idx)
                return CMD_WARNING;

        int uj = use_json(argc, argv);
        if (uj)
                argc--;

        /* neighbors <A.B.C.D|X:X::X:X|WORD> */
        argv_find(argv, argc, "neighbors", &idx);
        peerstr = argv[++idx]->arg;

        peer = peer_lookup_in_view(vty, bgp, peerstr, uj);
        if (!peer) {
                vty_out(vty, "No such neighbor\n");
                return CMD_WARNING;
        }

        if (argv_find(argv, argc, "flap-statistics", &idx))
                sh_type = bgp_show_type_flap_neighbor;
        else if (argv_find(argv, argc, "dampened-routes", &idx))
                sh_type = bgp_show_type_damp_neighbor;
        else if (argv_find(argv, argc, "routes", &idx))
                sh_type = bgp_show_type_neighbor;

        return bgp_show_neighbor_route(vty, peer, afi, safi, sh_type, uj);
}

struct bgp_table *bgp_distance_table[AFI_MAX][SAFI_MAX];

struct bgp_distance {
        /* Distance value for the IP source prefix. */
        uint8_t distance;

        /* Name of the access-list to be matched. */
        char *access_list;
};

DEFUN (show_bgp_afi_vpn_rd_route,
       show_bgp_afi_vpn_rd_route_cmd,
       "show bgp "BGP_AFI_CMD_STR" vpn rd ASN:NN_OR_IP-ADDRESS:NN <A.B.C.D/M|X:X::X:X/M> [json]",
       SHOW_STR
       BGP_STR
       BGP_AFI_HELP_STR
       "Address Family modifier\n"
       "Display information for a route distinguisher\n"
       "Route Distinguisher\n"
       "Network in the BGP routing table to display\n"
       "Network in the BGP routing table to display\n"
       JSON_STR)
{
        int ret;
        struct prefix_rd prd;
        afi_t afi = AFI_MAX;
        int idx = 0;

        if (!argv_find_and_parse_afi(argv, argc, &idx, &afi)) {
                vty_out(vty, "%% Malformed Address Family\n");
                return CMD_WARNING;
        }

        ret = str2prefix_rd(argv[5]->arg, &prd);
        if (!ret) {
                vty_out(vty, "%% Malformed Route Distinguisher\n");
                return CMD_WARNING;
        }

        return bgp_show_route(vty, NULL, argv[6]->arg, afi, SAFI_MPLS_VPN, &prd,
                              0, BGP_PATH_ALL, use_json(argc, argv));
}

static struct bgp_distance *bgp_distance_new(void)
{
        return XCALLOC(MTYPE_BGP_DISTANCE, sizeof(struct bgp_distance));
}

static void bgp_distance_free(struct bgp_distance *bdistance)
{
        XFREE(MTYPE_BGP_DISTANCE, bdistance);
}

static int bgp_distance_set(struct vty *vty, const char *distance_str,
                            const char *ip_str, const char *access_list_str)
{
        int ret;
        afi_t afi;
        safi_t safi;
        struct prefix p;
        uint8_t distance;
        struct bgp_node *rn;
        struct bgp_distance *bdistance;

        afi = bgp_node_afi(vty);
        safi = bgp_node_safi(vty);

        ret = str2prefix(ip_str, &p);
        if (ret == 0) {
                vty_out(vty, "Malformed prefix\n");
                return CMD_WARNING_CONFIG_FAILED;
        }

        distance = atoi(distance_str);

        /* Get BGP distance node. */
        rn = bgp_node_get(bgp_distance_table[afi][safi], (struct prefix *)&p);
        if (rn->info) {
                bdistance = rn->info;
                bgp_unlock_node(rn);
        } else {
                bdistance = bgp_distance_new();
                rn->info = bdistance;
        }

        /* Set distance value. */
        bdistance->distance = distance;

        /* Reset access-list configuration. */
        if (bdistance->access_list) {
                XFREE(MTYPE_AS_LIST, bdistance->access_list);
                bdistance->access_list = NULL;
        }
        if (access_list_str)
                bdistance->access_list =
                        XSTRDUP(MTYPE_AS_LIST, access_list_str);

        return CMD_SUCCESS;
}

static int bgp_distance_unset(struct vty *vty, const char *distance_str,
                              const char *ip_str, const char *access_list_str)
{
        int ret;
        afi_t afi;
        safi_t safi;
        struct prefix p;
        int distance;
        struct bgp_node *rn;
        struct bgp_distance *bdistance;

        afi = bgp_node_afi(vty);
        safi = bgp_node_safi(vty);

        ret = str2prefix(ip_str, &p);
        if (ret == 0) {
                vty_out(vty, "Malformed prefix\n");
                return CMD_WARNING_CONFIG_FAILED;
        }

        rn = bgp_node_lookup(bgp_distance_table[afi][safi],
                             (struct prefix *)&p);
        if (!rn) {
                vty_out(vty, "Can't find specified prefix\n");
                return CMD_WARNING_CONFIG_FAILED;
        }

        bdistance = rn->info;
        distance = atoi(distance_str);

        if (bdistance->distance != distance) {
                vty_out(vty, "Distance does not match configured\n");
                return CMD_WARNING_CONFIG_FAILED;
        }

        if (bdistance->access_list)
                XFREE(MTYPE_AS_LIST, bdistance->access_list);
        bgp_distance_free(bdistance);

        rn->info = NULL;
        bgp_unlock_node(rn);
        bgp_unlock_node(rn);

        return CMD_SUCCESS;
}

/* Apply BGP information to distance method. */
uint8_t bgp_distance_apply(struct prefix *p, struct bgp_info *rinfo, afi_t afi,
                           safi_t safi, struct bgp *bgp)
{
        struct bgp_node *rn;
        struct prefix q;
        struct peer *peer;
        struct bgp_distance *bdistance;
        struct access_list *alist;
        struct bgp_static *bgp_static;

        if (!bgp)
                return 0;

        peer = rinfo->peer;

        /* Check source address. */
        sockunion2hostprefix(&peer->su, &q);
        rn = bgp_node_match(bgp_distance_table[afi][safi], &q);
        if (rn) {
                bdistance = rn->info;
                bgp_unlock_node(rn);

                if (bdistance->access_list) {
                        alist = access_list_lookup(afi, bdistance->access_list);
                        if (alist
                            && access_list_apply(alist, p) == FILTER_PERMIT)
                                return bdistance->distance;
                } else
                        return bdistance->distance;
        }

        /* Backdoor check. */
        rn = bgp_node_lookup(bgp->route[afi][safi], p);
        if (rn) {
                bgp_static = rn->info;
                bgp_unlock_node(rn);

                if (bgp_static->backdoor) {
                        if (bgp->distance_local[afi][safi])
                                return bgp->distance_local[afi][safi];
                        else
                                return ZEBRA_IBGP_DISTANCE_DEFAULT;
                }
        }

        if (peer->sort == BGP_PEER_EBGP) {
                if (bgp->distance_ebgp[afi][safi])
                        return bgp->distance_ebgp[afi][safi];
                return ZEBRA_EBGP_DISTANCE_DEFAULT;
        } else {
                if (bgp->distance_ibgp[afi][safi])
                        return bgp->distance_ibgp[afi][safi];
                return ZEBRA_IBGP_DISTANCE_DEFAULT;
        }
}

DEFUN (bgp_distance,
       bgp_distance_cmd,
       "distance bgp (1-255) (1-255) (1-255)",
       "Define an administrative distance\n"
       "BGP distance\n"
       "Distance for routes external to the AS\n"
       "Distance for routes internal to the AS\n"
       "Distance for local routes\n")
{
        VTY_DECLVAR_CONTEXT(bgp, bgp);
        int idx_number = 2;
        int idx_number_2 = 3;
        int idx_number_3 = 4;
        afi_t afi;
        safi_t safi;

        afi = bgp_node_afi(vty);
        safi = bgp_node_safi(vty);

        bgp->distance_ebgp[afi][safi] = atoi(argv[idx_number]->arg);
        bgp->distance_ibgp[afi][safi] = atoi(argv[idx_number_2]->arg);
        bgp->distance_local[afi][safi] = atoi(argv[idx_number_3]->arg);
        return CMD_SUCCESS;
}

DEFUN (no_bgp_distance,
       no_bgp_distance_cmd,
       "no distance bgp [(1-255) (1-255) (1-255)]",
       NO_STR
       "Define an administrative distance\n"
       "BGP distance\n"
       "Distance for routes external to the AS\n"
       "Distance for routes internal to the AS\n"
       "Distance for local routes\n")
{
        VTY_DECLVAR_CONTEXT(bgp, bgp);
        afi_t afi;
        safi_t safi;

        afi = bgp_node_afi(vty);
        safi = bgp_node_safi(vty);

        bgp->distance_ebgp[afi][safi] = 0;
        bgp->distance_ibgp[afi][safi] = 0;
        bgp->distance_local[afi][safi] = 0;
        return CMD_SUCCESS;
}


DEFUN (bgp_distance_source,
       bgp_distance_source_cmd,
       "distance (1-255) A.B.C.D/M",
       "Define an administrative distance\n"
       "Administrative distance\n"
       "IP source prefix\n")
{
        int idx_number = 1;
        int idx_ipv4_prefixlen = 2;
        bgp_distance_set(vty, argv[idx_number]->arg,
                         argv[idx_ipv4_prefixlen]->arg, NULL);
        return CMD_SUCCESS;
}

DEFUN (no_bgp_distance_source,
       no_bgp_distance_source_cmd,
       "no distance (1-255) A.B.C.D/M",
       NO_STR
       "Define an administrative distance\n"
       "Administrative distance\n"
       "IP source prefix\n")
{
        int idx_number = 2;
        int idx_ipv4_prefixlen = 3;
        bgp_distance_unset(vty, argv[idx_number]->arg,
                           argv[idx_ipv4_prefixlen]->arg, NULL);
        return CMD_SUCCESS;
}

DEFUN (bgp_distance_source_access_list,
       bgp_distance_source_access_list_cmd,
       "distance (1-255) A.B.C.D/M WORD",
       "Define an administrative distance\n"
       "Administrative distance\n"
       "IP source prefix\n"
       "Access list name\n")
{
        int idx_number = 1;
        int idx_ipv4_prefixlen = 2;
        int idx_word = 3;
        bgp_distance_set(vty, argv[idx_number]->arg,
                         argv[idx_ipv4_prefixlen]->arg, argv[idx_word]->arg);
        return CMD_SUCCESS;
}

DEFUN (no_bgp_distance_source_access_list,
       no_bgp_distance_source_access_list_cmd,
       "no distance (1-255) A.B.C.D/M WORD",
       NO_STR
       "Define an administrative distance\n"
       "Administrative distance\n"
       "IP source prefix\n"
       "Access list name\n")
{
        int idx_number = 2;
        int idx_ipv4_prefixlen = 3;
        int idx_word = 4;
        bgp_distance_unset(vty, argv[idx_number]->arg,
                           argv[idx_ipv4_prefixlen]->arg, argv[idx_word]->arg);
        return CMD_SUCCESS;
}

DEFUN (ipv6_bgp_distance_source,
       ipv6_bgp_distance_source_cmd,
       "distance (1-255) X:X::X:X/M",
       "Define an administrative distance\n"
       "Administrative distance\n"
       "IP source prefix\n")
{
        bgp_distance_set(vty, argv[1]->arg, argv[2]->arg, NULL);
        return CMD_SUCCESS;
}

DEFUN (no_ipv6_bgp_distance_source,
       no_ipv6_bgp_distance_source_cmd,
       "no distance (1-255) X:X::X:X/M",
       NO_STR
       "Define an administrative distance\n"
       "Administrative distance\n"
       "IP source prefix\n")
{
        bgp_distance_unset(vty, argv[2]->arg, argv[3]->arg, NULL);
        return CMD_SUCCESS;
}

DEFUN (ipv6_bgp_distance_source_access_list,
       ipv6_bgp_distance_source_access_list_cmd,
       "distance (1-255) X:X::X:X/M WORD",
       "Define an administrative distance\n"
       "Administrative distance\n"
       "IP source prefix\n"
       "Access list name\n")
{
        bgp_distance_set(vty, argv[1]->arg, argv[2]->arg, argv[3]->arg);
        return CMD_SUCCESS;
}

DEFUN (no_ipv6_bgp_distance_source_access_list,
       no_ipv6_bgp_distance_source_access_list_cmd,
       "no distance (1-255) X:X::X:X/M WORD",
       NO_STR
       "Define an administrative distance\n"
       "Administrative distance\n"
       "IP source prefix\n"
       "Access list name\n")
{
        bgp_distance_unset(vty, argv[2]->arg, argv[3]->arg, argv[4]->arg);
        return CMD_SUCCESS;
}

DEFUN (bgp_damp_set,
       bgp_damp_set_cmd,
       "bgp dampening [(1-45) [(1-20000) (1-20000) (1-255)]]",
       "BGP Specific commands\n"
       "Enable route-flap dampening\n"
       "Half-life time for the penalty\n"
       "Value to start reusing a route\n"
       "Value to start suppressing a route\n"
       "Maximum duration to suppress a stable route\n")
{
        VTY_DECLVAR_CONTEXT(bgp, bgp);
        int idx_half_life = 2;
        int idx_reuse = 3;
        int idx_suppress = 4;
        int idx_max_suppress = 5;
        int half = DEFAULT_HALF_LIFE * 60;
        int reuse = DEFAULT_REUSE;
        int suppress = DEFAULT_SUPPRESS;
        int max = 4 * half;

        if (argc == 6) {
                half = atoi(argv[idx_half_life]->arg) * 60;
                reuse = atoi(argv[idx_reuse]->arg);
                suppress = atoi(argv[idx_suppress]->arg);
                max = atoi(argv[idx_max_suppress]->arg) * 60;
        } else if (argc == 3) {
                half = atoi(argv[idx_half_life]->arg) * 60;
                max = 4 * half;
        }

        if (suppress < reuse) {
                vty_out(vty,
                        "Suppress value cannot be less than reuse value \n");
                return 0;
        }

        return bgp_damp_enable(bgp, bgp_node_afi(vty), bgp_node_safi(vty), half,
                               reuse, suppress, max);
}

DEFUN (bgp_damp_unset,
       bgp_damp_unset_cmd,
       "no bgp dampening [(1-45) [(1-20000) (1-20000) (1-255)]]",
       NO_STR
       "BGP Specific commands\n"
       "Enable route-flap dampening\n"
       "Half-life time for the penalty\n"
       "Value to start reusing a route\n"
       "Value to start suppressing a route\n"
       "Maximum duration to suppress a stable route\n")
{
        VTY_DECLVAR_CONTEXT(bgp, bgp);
        return bgp_damp_disable(bgp, bgp_node_afi(vty), bgp_node_safi(vty));
}

/* Display specified route of BGP table. */
static int bgp_clear_damp_route(struct vty *vty, const char *view_name,
                                const char *ip_str, afi_t afi, safi_t safi,
                                struct prefix_rd *prd, int prefix_check)
{
        int ret;
        struct prefix match;
        struct bgp_node *rn;
        struct bgp_node *rm;
        struct bgp_info *ri;
        struct bgp_info *ri_temp;
        struct bgp *bgp;
        struct bgp_table *table;

        /* BGP structure lookup. */
        if (view_name) {
                bgp = bgp_lookup_by_name(view_name);
                if (bgp == NULL) {
                        vty_out(vty, "%% Can't find BGP instance %s\n",
                                view_name);
                        return CMD_WARNING;
                }
        } else {
                bgp = bgp_get_default();
                if (bgp == NULL) {
                        vty_out(vty, "%% No BGP process is configured\n");
                        return CMD_WARNING;
                }
        }

        /* Check IP address argument. */
        ret = str2prefix(ip_str, &match);
        if (!ret) {
                vty_out(vty, "%% address is malformed\n");
                return CMD_WARNING;
        }

        match.family = afi2family(afi);

        if ((safi == SAFI_MPLS_VPN) || (safi == SAFI_ENCAP)
            || (safi == SAFI_EVPN)) {
                for (rn = bgp_table_top(bgp->rib[AFI_IP][safi]); rn;
                     rn = bgp_route_next(rn)) {
                        if (prd && memcmp(rn->p.u.val, prd->val, 8) != 0)
                                continue;
                        if ((table = rn->info) == NULL)
                                continue;
                        if ((rm = bgp_node_match(table, &match)) == NULL)
                                continue;

                        if (!prefix_check
                            || rm->p.prefixlen == match.prefixlen) {
                                ri = rm->info;
                                while (ri) {
                                        if (ri->extra && ri->extra->damp_info) {
                                                ri_temp = ri->next;
                                                bgp_damp_info_free(
                                                        ri->extra->damp_info,
                                                        1);
                                                ri = ri_temp;
                                        } else
                                                ri = ri->next;
                                }
                        }

                        bgp_unlock_node(rm);
                }
        } else {
                if ((rn = bgp_node_match(bgp->rib[afi][safi], &match))
                    != NULL) {
                        if (!prefix_check
                            || rn->p.prefixlen == match.prefixlen) {
                                ri = rn->info;
                                while (ri) {
                                        if (ri->extra && ri->extra->damp_info) {
                                                ri_temp = ri->next;
                                                bgp_damp_info_free(
                                                        ri->extra->damp_info,
                                                        1);
                                                ri = ri_temp;
                                        } else
                                                ri = ri->next;
                                }
                        }

                        bgp_unlock_node(rn);
                }
        }

        return CMD_SUCCESS;
}

DEFUN (clear_ip_bgp_dampening,
       clear_ip_bgp_dampening_cmd,
       "clear ip bgp dampening",
       CLEAR_STR
       IP_STR
       BGP_STR
       "Clear route flap dampening information\n")
{
        bgp_damp_info_clean();
        return CMD_SUCCESS;
}

DEFUN (clear_ip_bgp_dampening_prefix,
       clear_ip_bgp_dampening_prefix_cmd,
       "clear ip bgp dampening A.B.C.D/M",
       CLEAR_STR
       IP_STR
       BGP_STR
       "Clear route flap dampening information\n"
       "IPv4 prefix\n")
{
        int idx_ipv4_prefixlen = 4;
        return bgp_clear_damp_route(vty, NULL, argv[idx_ipv4_prefixlen]->arg,
                                    AFI_IP, SAFI_UNICAST, NULL, 1);
}

DEFUN (clear_ip_bgp_dampening_address,
       clear_ip_bgp_dampening_address_cmd,
       "clear ip bgp dampening A.B.C.D",
       CLEAR_STR
       IP_STR
       BGP_STR
       "Clear route flap dampening information\n"
       "Network to clear damping information\n")
{
        int idx_ipv4 = 4;
        return bgp_clear_damp_route(vty, NULL, argv[idx_ipv4]->arg, AFI_IP,
                                    SAFI_UNICAST, NULL, 0);
}

DEFUN (clear_ip_bgp_dampening_address_mask,
       clear_ip_bgp_dampening_address_mask_cmd,
       "clear ip bgp dampening A.B.C.D A.B.C.D",
       CLEAR_STR
       IP_STR
       BGP_STR
       "Clear route flap dampening information\n"
       "Network to clear damping information\n"
       "Network mask\n")
{
        int idx_ipv4 = 4;
        int idx_ipv4_2 = 5;
        int ret;
        char prefix_str[BUFSIZ];

        ret = netmask_str2prefix_str(argv[idx_ipv4]->arg, argv[idx_ipv4_2]->arg,
                                     prefix_str);
        if (!ret) {
                vty_out(vty, "%% Inconsistent address and mask\n");
                return CMD_WARNING;
        }

        return bgp_clear_damp_route(vty, NULL, prefix_str, AFI_IP, SAFI_UNICAST,
                                    NULL, 0);
}

/* also used for encap safi */
static void bgp_config_write_network_vpn(struct vty *vty, struct bgp *bgp,
                                         afi_t afi, safi_t safi)
{
        struct bgp_node *prn;
        struct bgp_node *rn;
        struct bgp_table *table;
        struct prefix *p;
        struct prefix_rd *prd;
        struct bgp_static *bgp_static;
        mpls_label_t label;
        char buf[SU_ADDRSTRLEN];
        char rdbuf[RD_ADDRSTRLEN];

        /* Network configuration. */
        for (prn = bgp_table_top(bgp->route[afi][safi]); prn;
             prn = bgp_route_next(prn)) {
                if ((table = prn->info) == NULL)
                        continue;

                for (rn = bgp_table_top(table); rn; rn = bgp_route_next(rn)) {
                        if ((bgp_static = rn->info) == NULL)
                                continue;

                        p = &rn->p;
                        prd = (struct prefix_rd *)&prn->p;

                        /* "network" configuration display.  */
                        prefix_rd2str(prd, rdbuf, sizeof(rdbuf));
                        label = decode_label(&bgp_static->label);

                        vty_out(vty, "  network %s/%d rd %s",
                                inet_ntop(p->family, &p->u.prefix, buf,
                                          SU_ADDRSTRLEN),
                                p->prefixlen, rdbuf);
                        if (safi == SAFI_MPLS_VPN)
                                vty_out(vty, " label %u", label);

                        if (bgp_static->rmap.name)
                                vty_out(vty, " route-map %s",
                                        bgp_static->rmap.name);

                        if (bgp_static->backdoor)
                                vty_out(vty, " backdoor");

                        vty_out(vty, "\n");
                }
        }
}

static void bgp_config_write_network_evpn(struct vty *vty, struct bgp *bgp,
                                          afi_t afi, safi_t safi)
{
        struct bgp_node *prn;
        struct bgp_node *rn;
        struct bgp_table *table;
        struct prefix *p;
        struct prefix_rd *prd;
        struct bgp_static *bgp_static;
        char buf[PREFIX_STRLEN];
        char buf2[SU_ADDRSTRLEN];
        char rdbuf[RD_ADDRSTRLEN];

        /* Network configuration. */
        for (prn = bgp_table_top(bgp->route[afi][safi]); prn;
             prn = bgp_route_next(prn)) {
                if ((table = prn->info) == NULL)
                        continue;

                for (rn = bgp_table_top(table); rn; rn = bgp_route_next(rn)) {
                        if ((bgp_static = rn->info) == NULL)
                                continue;

                        char *macrouter = NULL;
                        char *esi = NULL;

                        if (bgp_static->router_mac)
                                macrouter = prefix_mac2str(
                                        bgp_static->router_mac, NULL, 0);
                        if (bgp_static->eth_s_id)
                                esi = esi2str(bgp_static->eth_s_id);
                        p = &rn->p;
                        prd = (struct prefix_rd *)&prn->p;

                        /* "network" configuration display.  */
                        prefix_rd2str(prd, rdbuf, sizeof(rdbuf));
                        if (p->u.prefix_evpn.route_type == 5) {
                                char local_buf[PREFIX_STRLEN];
                                uint8_t family = IS_EVPN_PREFIX_IPADDR_V4((
                                                         struct prefix_evpn *)p)
                                                         ? AF_INET
                                                         : AF_INET6;
                                inet_ntop(family, &p->u.prefix_evpn.ip.ip.addr,
                                          local_buf, PREFIX_STRLEN);
                                sprintf(buf, "%s/%u", local_buf,
                                        p->u.prefix_evpn.ip_prefix_length);
                        } else {
                                prefix2str(p, buf, sizeof(buf));
                        }

                        if (bgp_static->gatewayIp.family == AF_INET
                            || bgp_static->gatewayIp.family == AF_INET6)
                                inet_ntop(bgp_static->gatewayIp.family,
                                          &bgp_static->gatewayIp.u.prefix, buf2,
                                          sizeof(buf2));
                        vty_out(vty,
                                "  network %s rd %s ethtag %u label %u esi %s gwip %s routermac %s\n",
                                buf, rdbuf, p->u.prefix_evpn.eth_tag,
                                decode_label(&bgp_static->label), esi, buf2,
                                macrouter);

                        if (macrouter)
                                XFREE(MTYPE_TMP, macrouter);
                        if (esi)
                                XFREE(MTYPE_TMP, esi);
                }
        }
}

/* Configuration of static route announcement and aggregate
   information. */
void bgp_config_write_network(struct vty *vty, struct bgp *bgp, afi_t afi,
                              safi_t safi)
{
        struct bgp_node *rn;
        struct prefix *p;
        struct bgp_static *bgp_static;
        struct bgp_aggregate *bgp_aggregate;
        char buf[SU_ADDRSTRLEN];

        if ((safi == SAFI_MPLS_VPN) || (safi == SAFI_ENCAP)) {
                bgp_config_write_network_vpn(vty, bgp, afi, safi);
                return;
        }

        if (afi == AFI_L2VPN && safi == SAFI_EVPN) {
                bgp_config_write_network_evpn(vty, bgp, afi, safi);
                return;
        }

        /* Network configuration. */
        for (rn = bgp_table_top(bgp->route[afi][safi]); rn;
             rn = bgp_route_next(rn)) {
                if ((bgp_static = rn->info) == NULL)
                        continue;

                p = &rn->p;

                /* "network" configuration display.  */
                if (bgp_option_check(BGP_OPT_CONFIG_CISCO) && afi == AFI_IP) {
                        uint32_t destination;
                        struct in_addr netmask;

                        destination = ntohl(p->u.prefix4.s_addr);
                        masklen2ip(p->prefixlen, &netmask);
                        vty_out(vty, "  network %s",
                                inet_ntop(p->family, &p->u.prefix, buf,
                                          SU_ADDRSTRLEN));

                        if ((IN_CLASSC(destination) && p->prefixlen == 24)
                            || (IN_CLASSB(destination) && p->prefixlen == 16)
                            || (IN_CLASSA(destination) && p->prefixlen == 8)
                            || p->u.prefix4.s_addr == 0) {
                                /* Natural mask is not display. */
                        } else
                                vty_out(vty, " mask %s", inet_ntoa(netmask));
                } else {
                        vty_out(vty, "  network %s/%d",
                                inet_ntop(p->family, &p->u.prefix, buf,
                                          SU_ADDRSTRLEN),
                                p->prefixlen);
                }

                if (bgp_static->label_index != BGP_INVALID_LABEL_INDEX)
                        vty_out(vty, " label-index %u",
                                bgp_static->label_index);

                if (bgp_static->rmap.name)
                        vty_out(vty, " route-map %s", bgp_static->rmap.name);

                if (bgp_static->backdoor)
                        vty_out(vty, " backdoor");

                vty_out(vty, "\n");
        }

        /* Aggregate-address configuration. */
        for (rn = bgp_table_top(bgp->aggregate[afi][safi]); rn;
             rn = bgp_route_next(rn)) {
                if ((bgp_aggregate = rn->info) == NULL)
                        continue;

                p = &rn->p;

                if (bgp_option_check(BGP_OPT_CONFIG_CISCO) && afi == AFI_IP) {
                        struct in_addr netmask;

                        masklen2ip(p->prefixlen, &netmask);
                        vty_out(vty, "  aggregate-address %s %s",
                                inet_ntop(p->family, &p->u.prefix, buf,
                                          SU_ADDRSTRLEN),
                                inet_ntoa(netmask));
                } else {
                        vty_out(vty, "  aggregate-address %s/%d",
                                inet_ntop(p->family, &p->u.prefix, buf,
                                          SU_ADDRSTRLEN),
                                p->prefixlen);
                }

                if (bgp_aggregate->as_set)
                        vty_out(vty, " as-set");

                if (bgp_aggregate->summary_only)
                        vty_out(vty, " summary-only");

                vty_out(vty, "\n");
        }
}

void bgp_config_write_distance(struct vty *vty, struct bgp *bgp, afi_t afi,
                               safi_t safi)
{
        struct bgp_node *rn;
        struct bgp_distance *bdistance;

        /* Distance configuration. */
        if (bgp->distance_ebgp[afi][safi] && bgp->distance_ibgp[afi][safi]
            && bgp->distance_local[afi][safi]
            && (bgp->distance_ebgp[afi][safi] != ZEBRA_EBGP_DISTANCE_DEFAULT
                || bgp->distance_ibgp[afi][safi] != ZEBRA_IBGP_DISTANCE_DEFAULT
                || bgp->distance_local[afi][safi]
                           != ZEBRA_IBGP_DISTANCE_DEFAULT)) {
                vty_out(vty, "  distance bgp %d %d %d\n",
                        bgp->distance_ebgp[afi][safi],
                        bgp->distance_ibgp[afi][safi],
                        bgp->distance_local[afi][safi]);
        }

        for (rn = bgp_table_top(bgp_distance_table[afi][safi]); rn;
             rn = bgp_route_next(rn))
                if ((bdistance = rn->info) != NULL) {
                        char buf[PREFIX_STRLEN];

                        vty_out(vty, "  distance %d %s %s\n",
                                bdistance->distance,
                                prefix2str(&rn->p, buf, sizeof(buf)),
                                bdistance->access_list ? bdistance->access_list
                                                       : "");
                }
}

/* Allocate routing table structure and install commands. */
void bgp_route_init(void)
{
        afi_t afi;
        safi_t safi;

        /* Init BGP distance table. */
        FOREACH_AFI_SAFI (afi, safi)
                bgp_distance_table[afi][safi] = bgp_table_init(afi, safi);

        /* IPv4 BGP commands. */
        install_element(BGP_NODE, &bgp_table_map_cmd);
        install_element(BGP_NODE, &bgp_network_cmd);
        install_element(BGP_NODE, &no_bgp_table_map_cmd);

        install_element(BGP_NODE, &aggregate_address_cmd);
        install_element(BGP_NODE, &aggregate_address_mask_cmd);
        install_element(BGP_NODE, &no_aggregate_address_cmd);
        install_element(BGP_NODE, &no_aggregate_address_mask_cmd);

        /* IPv4 unicast configuration.  */
        install_element(BGP_IPV4_NODE, &bgp_table_map_cmd);
        install_element(BGP_IPV4_NODE, &bgp_network_cmd);
        install_element(BGP_IPV4_NODE, &no_bgp_table_map_cmd);

        install_element(BGP_IPV4_NODE, &aggregate_address_cmd);
        install_element(BGP_IPV4_NODE, &aggregate_address_mask_cmd);
        install_element(BGP_IPV4_NODE, &no_aggregate_address_cmd);
        install_element(BGP_IPV4_NODE, &no_aggregate_address_mask_cmd);

        /* IPv4 multicast configuration.  */
        install_element(BGP_IPV4M_NODE, &bgp_table_map_cmd);
        install_element(BGP_IPV4M_NODE, &bgp_network_cmd);
        install_element(BGP_IPV4M_NODE, &no_bgp_table_map_cmd);
        install_element(BGP_IPV4M_NODE, &aggregate_address_cmd);
        install_element(BGP_IPV4M_NODE, &aggregate_address_mask_cmd);
        install_element(BGP_IPV4M_NODE, &no_aggregate_address_cmd);
        install_element(BGP_IPV4M_NODE, &no_aggregate_address_mask_cmd);

        /* IPv4 labeled-unicast configuration.  */
        install_element(VIEW_NODE, &show_ip_bgp_instance_all_cmd);
        install_element(VIEW_NODE, &show_ip_bgp_cmd);
        install_element(VIEW_NODE, &show_ip_bgp_json_cmd);
        install_element(VIEW_NODE, &show_ip_bgp_route_cmd);
        install_element(VIEW_NODE, &show_ip_bgp_regexp_cmd);

        install_element(VIEW_NODE,
                        &show_ip_bgp_instance_neighbor_advertised_route_cmd);
        install_element(VIEW_NODE, &show_ip_bgp_neighbor_routes_cmd);
        install_element(VIEW_NODE,
                        &show_ip_bgp_neighbor_received_prefix_filter_cmd);
#ifdef KEEP_OLD_VPN_COMMANDS
        install_element(VIEW_NODE, &show_ip_bgp_vpn_all_route_prefix_cmd);
#endif /* KEEP_OLD_VPN_COMMANDS */
        install_element(VIEW_NODE, &show_bgp_afi_vpn_rd_route_cmd);
        install_element(VIEW_NODE,
                        &show_ip_bgp_l2vpn_evpn_all_route_prefix_cmd);

        /* BGP dampening clear commands */
        install_element(ENABLE_NODE, &clear_ip_bgp_dampening_cmd);
        install_element(ENABLE_NODE, &clear_ip_bgp_dampening_prefix_cmd);

        install_element(ENABLE_NODE, &clear_ip_bgp_dampening_address_cmd);
        install_element(ENABLE_NODE, &clear_ip_bgp_dampening_address_mask_cmd);

        /* prefix count */
        install_element(ENABLE_NODE,
                        &show_ip_bgp_instance_neighbor_prefix_counts_cmd);
#ifdef KEEP_OLD_VPN_COMMANDS
        install_element(ENABLE_NODE,
                        &show_ip_bgp_vpn_neighbor_prefix_counts_cmd);
#endif /* KEEP_OLD_VPN_COMMANDS */

        /* New config IPv6 BGP commands.  */
        install_element(BGP_IPV6_NODE, &bgp_table_map_cmd);
        install_element(BGP_IPV6_NODE, &ipv6_bgp_network_cmd);
        install_element(BGP_IPV6_NODE, &no_bgp_table_map_cmd);

        install_element(BGP_IPV6_NODE, &ipv6_aggregate_address_cmd);
        install_element(BGP_IPV6_NODE, &no_ipv6_aggregate_address_cmd);

        install_element(BGP_IPV6M_NODE, &ipv6_bgp_network_cmd);

        install_element(BGP_NODE, &bgp_distance_cmd);
        install_element(BGP_NODE, &no_bgp_distance_cmd);
        install_element(BGP_NODE, &bgp_distance_source_cmd);
        install_element(BGP_NODE, &no_bgp_distance_source_cmd);
        install_element(BGP_NODE, &bgp_distance_source_access_list_cmd);
        install_element(BGP_NODE, &no_bgp_distance_source_access_list_cmd);
        install_element(BGP_IPV4_NODE, &bgp_distance_cmd);
        install_element(BGP_IPV4_NODE, &no_bgp_distance_cmd);
        install_element(BGP_IPV4_NODE, &bgp_distance_source_cmd);
        install_element(BGP_IPV4_NODE, &no_bgp_distance_source_cmd);
        install_element(BGP_IPV4_NODE, &bgp_distance_source_access_list_cmd);
        install_element(BGP_IPV4_NODE, &no_bgp_distance_source_access_list_cmd);
        install_element(BGP_IPV4M_NODE, &bgp_distance_cmd);
        install_element(BGP_IPV4M_NODE, &no_bgp_distance_cmd);
        install_element(BGP_IPV4M_NODE, &bgp_distance_source_cmd);
        install_element(BGP_IPV4M_NODE, &no_bgp_distance_source_cmd);
        install_element(BGP_IPV4M_NODE, &bgp_distance_source_access_list_cmd);
        install_element(BGP_IPV4M_NODE,
                        &no_bgp_distance_source_access_list_cmd);
        install_element(BGP_IPV6_NODE, &bgp_distance_cmd);
        install_element(BGP_IPV6_NODE, &no_bgp_distance_cmd);
        install_element(BGP_IPV6_NODE, &ipv6_bgp_distance_source_cmd);
        install_element(BGP_IPV6_NODE, &no_ipv6_bgp_distance_source_cmd);
        install_element(BGP_IPV6_NODE,
                        &ipv6_bgp_distance_source_access_list_cmd);
        install_element(BGP_IPV6_NODE,
                        &no_ipv6_bgp_distance_source_access_list_cmd);
        install_element(BGP_IPV6M_NODE, &bgp_distance_cmd);
        install_element(BGP_IPV6M_NODE, &no_bgp_distance_cmd);
        install_element(BGP_IPV6M_NODE, &ipv6_bgp_distance_source_cmd);
        install_element(BGP_IPV6M_NODE, &no_ipv6_bgp_distance_source_cmd);
        install_element(BGP_IPV6M_NODE,
                        &ipv6_bgp_distance_source_access_list_cmd);
        install_element(BGP_IPV6M_NODE,
                        &no_ipv6_bgp_distance_source_access_list_cmd);

        install_element(BGP_NODE, &bgp_damp_set_cmd);
        install_element(BGP_NODE, &bgp_damp_unset_cmd);
        install_element(BGP_IPV4_NODE, &bgp_damp_set_cmd);
        install_element(BGP_IPV4_NODE, &bgp_damp_unset_cmd);

        /* IPv4 Multicast Mode */
        install_element(BGP_IPV4M_NODE, &bgp_damp_set_cmd);
        install_element(BGP_IPV4M_NODE, &bgp_damp_unset_cmd);

        /* Large Communities */
        install_element(VIEW_NODE, &show_ip_bgp_large_community_list_cmd);
        install_element(VIEW_NODE, &show_ip_bgp_large_community_cmd);
}

void bgp_route_finish(void)
{
        afi_t afi;
        safi_t safi;

        FOREACH_AFI_SAFI (afi, safi) {
                bgp_table_unlock(bgp_distance_table[afi][safi]);
                bgp_distance_table[afi][safi] = NULL;
        }
}