zebra: check for vni before comparison in zl3vni_map_to_vxlan_if_ns

[mirror_frr.git] / zebra / zebra_vxlan.c

/*
 * Zebra EVPN for VxLAN code
 * Copyright (C) 2016, 2017 Cumulus Networks, Inc.
 *
 * This file is part of FRR.
 *
 * FRR 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.
 *
 * FRR 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 FRR; see the file COPYING.  If not, write to the Free
 * Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
 * 02111-1307, USA.
 */

#include <zebra.h>

#include "hash.h"
#include "if.h"
#include "jhash.h"
#include "linklist.h"
#include "log.h"
#include "memory.h"
#include "prefix.h"
#include "stream.h"
#include "table.h"
#include "vlan.h"
#include "vxlan.h"
#ifdef GNU_LINUX
#include <linux/neighbour.h>
#endif
#include "lib/printfrr.h"

#include "zebra/zebra_router.h"
#include "zebra/debug.h"
#include "zebra/interface.h"
#include "zebra/rib.h"
#include "zebra/rt.h"
#include "zebra/rt_netlink.h"
#include "zebra/zebra_errors.h"
#include "zebra/zebra_l2.h"
#include "zebra/zebra_l2_bridge_if.h"
#include "zebra/zebra_ns.h"
#include "zebra/zebra_vrf.h"
#include "zebra/zebra_vxlan.h"
#include "zebra/zebra_vxlan_private.h"
#include "zebra/zebra_evpn.h"
#include "zebra/zebra_evpn_mac.h"
#include "zebra/zebra_evpn_neigh.h"
#include "zebra/zebra_evpn_mh.h"
#include "zebra/zebra_evpn_vxlan.h"
#include "zebra/zebra_router.h"

DEFINE_MTYPE_STATIC(ZEBRA, HOST_PREFIX, "host prefix");
DEFINE_MTYPE_STATIC(ZEBRA, ZL3VNI, "L3 VNI hash");
DEFINE_MTYPE_STATIC(ZEBRA, L3VNI_MAC, "EVPN L3VNI MAC");
DEFINE_MTYPE_STATIC(ZEBRA, L3NEIGH, "EVPN Neighbor");
DEFINE_MTYPE_STATIC(ZEBRA, ZVXLAN_SG, "zebra VxLAN multicast group");
DEFINE_MTYPE_STATIC(ZEBRA, EVPN_VTEP, "zebra VxLAN VTEP IP");

DEFINE_HOOK(zebra_rmac_update,
            (struct zebra_mac * rmac, struct zebra_l3vni *zl3vni, bool delete,
             const char *reason),
            (rmac, zl3vni, delete, reason));

/* config knobs */
static bool accept_bgp_seq = true;

/* static function declarations */
static void zevpn_print_neigh_hash_all_evpn(struct hash_bucket *bucket,
                                            void **args);
static void zl3vni_print_nh(struct zebra_neigh *n, struct vty *vty,
                            json_object *json);
static void zl3vni_print_rmac(struct zebra_mac *zrmac, struct vty *vty,
                              json_object *json);
static void zevpn_print_mac_hash_all_evpn(struct hash_bucket *bucket, void *ctxt);

/* l3-vni next-hop neigh related APIs */
static struct zebra_neigh *zl3vni_nh_lookup(struct zebra_l3vni *zl3vni,
                                            const struct ipaddr *ip);
static void *zl3vni_nh_alloc(void *p);
static struct zebra_neigh *zl3vni_nh_add(struct zebra_l3vni *zl3vni,
                                         const struct ipaddr *vtep_ip,
                                         const struct ethaddr *rmac);
static int zl3vni_nh_del(struct zebra_l3vni *zl3vni, struct zebra_neigh *n);
static int zl3vni_nh_install(struct zebra_l3vni *zl3vni, struct zebra_neigh *n);
static int zl3vni_nh_uninstall(struct zebra_l3vni *zl3vni,
                               struct zebra_neigh *n);

/* l3-vni rmac related APIs */
static void zl3vni_print_rmac_hash(struct hash_bucket *, void *);
static struct zebra_mac *zl3vni_rmac_lookup(struct zebra_l3vni *zl3vni,
                                            const struct ethaddr *rmac);
static void *zl3vni_rmac_alloc(void *p);
static struct zebra_mac *zl3vni_rmac_add(struct zebra_l3vni *zl3vni,
                                         const struct ethaddr *rmac);
static int zl3vni_rmac_del(struct zebra_l3vni *zl3vni, struct zebra_mac *zrmac);
static int zl3vni_rmac_install(struct zebra_l3vni *zl3vni,
                               struct zebra_mac *zrmac);
static int zl3vni_rmac_uninstall(struct zebra_l3vni *zl3vni,
                                 struct zebra_mac *zrmac);

/* l3-vni related APIs*/
static void *zl3vni_alloc(void *p);
static struct zebra_l3vni *zl3vni_add(vni_t vni, vrf_id_t vrf_id);
static int zl3vni_del(struct zebra_l3vni *zl3vni);

static void zevpn_build_hash_table(void);
static unsigned int zebra_vxlan_sg_hash_key_make(const void *p);
static bool zebra_vxlan_sg_hash_eq(const void *p1, const void *p2);
static void zebra_vxlan_sg_do_deref(struct zebra_vrf *zvrf,
                struct in_addr sip, struct in_addr mcast_grp);
static struct zebra_vxlan_sg *zebra_vxlan_sg_do_ref(struct zebra_vrf *vrf,
                                                    struct in_addr sip,
                                                    struct in_addr mcast_grp);
static void zebra_vxlan_cleanup_sg_table(struct zebra_vrf *zvrf);

bool zebra_evpn_do_dup_addr_detect(struct zebra_vrf *zvrf)
{
        return zvrf->dup_addr_detect && zebra_evpn_mh_do_dup_addr_detect();
}

/* Private functions */
static int host_rb_entry_compare(const struct host_rb_entry *hle1,
                                 const struct host_rb_entry *hle2)
{
        if (hle1->p.family < hle2->p.family)
                return -1;

        if (hle1->p.family > hle2->p.family)
                return 1;

        if (hle1->p.prefixlen < hle2->p.prefixlen)
                return -1;

        if (hle1->p.prefixlen > hle2->p.prefixlen)
                return 1;

        if (hle1->p.family == AF_INET) {
                if (hle1->p.u.prefix4.s_addr < hle2->p.u.prefix4.s_addr)
                        return -1;

                if (hle1->p.u.prefix4.s_addr > hle2->p.u.prefix4.s_addr)
                        return 1;

                return 0;
        } else if (hle1->p.family == AF_INET6) {
                return memcmp(&hle1->p.u.prefix6, &hle2->p.u.prefix6,
                              IPV6_MAX_BYTELEN);
        } else if (hle1->p.family == AF_EVPN) {
                uint8_t family1;
                uint8_t family2;

                /* two (v4/v6) dummy prefixes of route_type BGP_EVPN_AD_ROUTE
                 * are used for all nexthops associated with a non-zero ESI
                 */
                family1 = is_evpn_prefix_ipaddr_v4(
                                  (const struct prefix_evpn *)&hle1->p)
                                  ? AF_INET
                                  : AF_INET6;
                family2 = is_evpn_prefix_ipaddr_v4(
                                  (const struct prefix_evpn *)&hle2->p)
                                  ? AF_INET
                                  : AF_INET6;


                if (family1 < family2)
                        return -1;

                if (family1 > family2)
                        return 1;

                return 0;
        } else {
                zlog_debug("%s: Unexpected family type: %d", __func__,
                           hle1->p.family);
                return 0;
        }
}
RB_GENERATE(host_rb_tree_entry, host_rb_entry, hl_entry, host_rb_entry_compare);

static uint32_t rb_host_count(struct host_rb_tree_entry *hrbe)
{
        struct host_rb_entry *hle;
        uint32_t count = 0;

        RB_FOREACH (hle, host_rb_tree_entry, hrbe)
                count++;

        return count;
}

static int l3vni_rmac_nh_list_cmp(void *p1, void *p2)
{
        const struct ipaddr *vtep_ip1 = p1;
        const struct ipaddr *vtep_ip2 = p2;

        return !ipaddr_cmp(vtep_ip1, vtep_ip2);
}

static void l3vni_rmac_nh_free(struct ipaddr *vtep_ip)
{
        XFREE(MTYPE_EVPN_VTEP, vtep_ip);
}

static void l3vni_rmac_nh_list_nh_delete(struct zebra_l3vni *zl3vni,
                                         struct zebra_mac *zrmac,
                                         struct ipaddr *vtep_ip)
{
        struct listnode *node = NULL, *nnode = NULL;
        struct ipaddr *vtep = NULL;

        for (ALL_LIST_ELEMENTS(zrmac->nh_list, node, nnode, vtep)) {
                if (ipaddr_cmp(vtep, vtep_ip) == 0)
                        break;
        }

        if (node) {
                l3vni_rmac_nh_free(vtep);
                list_delete_node(zrmac->nh_list, node);
        }
}

/*
 * Print neighbors for all EVPN.
 */
static void zevpn_print_neigh_hash_all_evpn(struct hash_bucket *bucket,
                                          void **args)
{
        struct vty *vty;
        json_object *json = NULL, *json_evpn = NULL;
        struct zebra_evpn *zevpn;
        uint32_t num_neigh;
        struct neigh_walk_ctx wctx;
        char vni_str[VNI_STR_LEN];
        uint32_t print_dup;

        vty = (struct vty *)args[0];
        json = (json_object *)args[1];
        print_dup = (uint32_t)(uintptr_t)args[2];

        zevpn = (struct zebra_evpn *)bucket->data;

        num_neigh = hashcount(zevpn->neigh_table);

        if (print_dup)
                num_neigh = num_dup_detected_neighs(zevpn);

        if (json == NULL) {
                vty_out(vty,
                        "\nVNI %u #ARP (IPv4 and IPv6, local and remote) %u\n\n",
                        zevpn->vni, num_neigh);
        } else {
                json_evpn = json_object_new_object();
                json_object_int_add(json_evpn, "numArpNd", num_neigh);
                snprintf(vni_str, VNI_STR_LEN, "%u", zevpn->vni);
        }

        if (!num_neigh) {
                if (json)
                        json_object_object_add(json, vni_str, json_evpn);
                return;
        }

        /* Since we have IPv6 addresses to deal with which can vary widely in
         * size, we try to be a bit more elegant in display by first computing
         * the maximum width.
         */
        memset(&wctx, 0, sizeof(wctx));
        wctx.zevpn = zevpn;
        wctx.vty = vty;
        wctx.addr_width = 15;
        wctx.json = json_evpn;
        hash_iterate(zevpn->neigh_table, zebra_evpn_find_neigh_addr_width,
                     &wctx);

        if (json == NULL)
                zebra_evpn_print_neigh_hdr(vty, &wctx);

        if (print_dup)
                hash_iterate(zevpn->neigh_table,
                             zebra_evpn_print_dad_neigh_hash, &wctx);
        else
                hash_iterate(zevpn->neigh_table, zebra_evpn_print_neigh_hash,
                             &wctx);

        if (json)
                json_object_object_add(json, vni_str, json_evpn);
}

/*
 * Print neighbors for all EVPNs in detail.
 */
static void zevpn_print_neigh_hash_all_evpn_detail(struct hash_bucket *bucket,
                                                 void **args)
{
        struct vty *vty;
        json_object *json = NULL, *json_evpn = NULL;
        struct zebra_evpn *zevpn;
        uint32_t num_neigh;
        struct neigh_walk_ctx wctx;
        char vni_str[VNI_STR_LEN];
        uint32_t print_dup;

        vty = (struct vty *)args[0];
        json = (json_object *)args[1];
        print_dup = (uint32_t)(uintptr_t)args[2];

        zevpn = (struct zebra_evpn *)bucket->data;
        if (!zevpn) {
                if (json)
                        vty_out(vty, "{}\n");
                return;
        }
        num_neigh = hashcount(zevpn->neigh_table);

        if (print_dup && num_dup_detected_neighs(zevpn) == 0)
                return;

        if (json == NULL) {
                vty_out(vty,
                        "\nVNI %u #ARP (IPv4 and IPv6, local and remote) %u\n\n",
                        zevpn->vni, num_neigh);
        } else {
                json_evpn = json_object_new_object();
                json_object_int_add(json_evpn, "numArpNd", num_neigh);
                snprintf(vni_str, VNI_STR_LEN, "%u", zevpn->vni);
        }
        if (!num_neigh) {
                if (json)
                        json_object_object_add(json, vni_str, json_evpn);
                return;
        }

        memset(&wctx, 0, sizeof(wctx));
        wctx.zevpn = zevpn;
        wctx.vty = vty;
        wctx.addr_width = 15;
        wctx.json = json_evpn;

        if (print_dup)
                hash_iterate(zevpn->neigh_table,
                             zebra_evpn_print_dad_neigh_hash_detail, &wctx);
        else
                hash_iterate(zevpn->neigh_table,
                             zebra_evpn_print_neigh_hash_detail, &wctx);

        if (json)
                json_object_object_add(json, vni_str, json_evpn);
}

/* print a specific next hop for an l3vni */
static void zl3vni_print_nh(struct zebra_neigh *n, struct vty *vty,
                            json_object *json)
{
        char buf1[ETHER_ADDR_STRLEN];
        char buf2[INET6_ADDRSTRLEN];
        json_object *json_hosts = NULL;
        struct host_rb_entry *hle;

        if (!json) {
                vty_out(vty, "Ip: %s\n",
                        ipaddr2str(&n->ip, buf2, sizeof(buf2)));
                vty_out(vty, "  RMAC: %s\n",
                        prefix_mac2str(&n->emac, buf1, sizeof(buf1)));
                vty_out(vty, "  Refcount: %d\n",
                        rb_host_count(&n->host_rb));
                vty_out(vty, "  Prefixes:\n");
                RB_FOREACH (hle, host_rb_tree_entry, &n->host_rb)
                        vty_out(vty, "    %pFX\n", &hle->p);
        } else {
                json_hosts = json_object_new_array();
                json_object_string_add(
                        json, "ip", ipaddr2str(&(n->ip), buf2, sizeof(buf2)));
                json_object_string_add(
                        json, "routerMac",
                        prefix_mac2str(&n->emac, buf2, sizeof(buf2)));
                json_object_int_add(json, "refCount",
                                    rb_host_count(&n->host_rb));
                RB_FOREACH (hle, host_rb_tree_entry, &n->host_rb)
                        json_object_array_add(json_hosts,
                                              json_object_new_string(prefix2str(
                                                                                &hle->p, buf2, sizeof(buf2))));
                json_object_object_add(json, "prefixList", json_hosts);
        }
}

/* Print a specific RMAC entry */
static void zl3vni_print_rmac(struct zebra_mac *zrmac, struct vty *vty,
                              json_object *json)
{
        struct listnode *node = NULL;
        struct ipaddr *vtep = NULL;
        json_object *json_nhs = NULL;

        if (!json) {
                vty_out(vty, "MAC: %pEA\n", &zrmac->macaddr);
                vty_out(vty, " Remote VTEP: %pI4\n",
                        &zrmac->fwd_info.r_vtep_ip);
        } else {
                json_nhs = json_object_new_array();
                json_object_string_addf(json, "routerMac", "%pEA",
                                        &zrmac->macaddr);
                json_object_string_addf(json, "vtepIp", "%pI4",
                                        &zrmac->fwd_info.r_vtep_ip);
                for (ALL_LIST_ELEMENTS_RO(zrmac->nh_list, node, vtep)) {
                        json_object_array_add(json_nhs, json_object_new_stringf(
                                                                "%pIA", vtep));
                }
                json_object_object_add(json, "nexthops", json_nhs);
        }
}

/*
 * Print MACs for all EVPNs.
 */
static void zevpn_print_mac_hash_all_evpn(struct hash_bucket *bucket, void *ctxt)
{
        struct vty *vty;
        json_object *json = NULL, *json_evpn = NULL;
        json_object *json_mac = NULL;
        struct zebra_evpn *zevpn;
        uint32_t num_macs;
        struct mac_walk_ctx *wctx = ctxt;
        char vni_str[VNI_STR_LEN];

        vty = wctx->vty;
        json = wctx->json;

        zevpn = (struct zebra_evpn *)bucket->data;
        wctx->zevpn = zevpn;

        /*We are iterating over a new VNI, set the count to 0*/
        wctx->count = 0;

        num_macs = num_valid_macs(zevpn);
        if (!num_macs)
                return;

        if (wctx->print_dup)
                num_macs = num_dup_detected_macs(zevpn);

        if (json) {
                json_evpn = json_object_new_object();
                json_mac = json_object_new_object();
                snprintf(vni_str, VNI_STR_LEN, "%u", zevpn->vni);
        }

        if (!CHECK_FLAG(wctx->flags, SHOW_REMOTE_MAC_FROM_VTEP)) {
                if (json == NULL) {
                        vty_out(vty, "\nVNI %u #MACs (local and remote) %u\n\n",
                                zevpn->vni, num_macs);
                        vty_out(vty,
                                "Flags: N=sync-neighs, I=local-inactive, P=peer-active, X=peer-proxy\n");
                        vty_out(vty, "%-17s %-6s %-5s %-30s %-5s %s\n", "MAC",
                                "Type", "Flags", "Intf/Remote ES/VTEP",
                                "VLAN", "Seq #'s");
                } else
                        json_object_int_add(json_evpn, "numMacs", num_macs);
        }

        if (!num_macs) {
                if (json) {
                        json_object_int_add(json_evpn, "numMacs", num_macs);
                        json_object_object_add(json, vni_str, json_evpn);
                }
                return;
        }

        /* assign per-evpn to wctx->json object to fill macs
         * under the evpn. Re-assign primary json object to fill
         * next evpn information.
         */
        wctx->json = json_mac;
        if (wctx->print_dup)
                hash_iterate(zevpn->mac_table, zebra_evpn_print_dad_mac_hash,
                             wctx);
        else
                hash_iterate(zevpn->mac_table, zebra_evpn_print_mac_hash, wctx);
        wctx->json = json;
        if (json) {
                if (wctx->count)
                        json_object_object_add(json_evpn, "macs", json_mac);
                json_object_object_add(json, vni_str, json_evpn);
        }
}

/*
 * Print MACs in detail for all EVPNs.
 */
static void zevpn_print_mac_hash_all_evpn_detail(struct hash_bucket *bucket,
                                               void *ctxt)
{
        struct vty *vty;
        json_object *json = NULL, *json_evpn = NULL;
        json_object *json_mac = NULL;
        struct zebra_evpn *zevpn;
        uint32_t num_macs;
        struct mac_walk_ctx *wctx = ctxt;
        char vni_str[VNI_STR_LEN];

        vty = wctx->vty;
        json = wctx->json;

        zevpn = (struct zebra_evpn *)bucket->data;
        if (!zevpn) {
                if (json)
                        vty_out(vty, "{}\n");
                return;
        }
        wctx->zevpn = zevpn;

        /*We are iterating over a new EVPN, set the count to 0*/
        wctx->count = 0;

        num_macs = num_valid_macs(zevpn);
        if (!num_macs)
                return;

        if (wctx->print_dup && (num_dup_detected_macs(zevpn) == 0))
                return;

        if (json) {
                json_evpn = json_object_new_object();
                json_mac = json_object_new_object();
                snprintf(vni_str, VNI_STR_LEN, "%u", zevpn->vni);
        }

        if (!CHECK_FLAG(wctx->flags, SHOW_REMOTE_MAC_FROM_VTEP)) {
                if (json == NULL) {
                        vty_out(vty, "\nVNI %u #MACs (local and remote) %u\n\n",
                                zevpn->vni, num_macs);
                } else
                        json_object_int_add(json_evpn, "numMacs", num_macs);
        }
        /* assign per-evpn to wctx->json object to fill macs
         * under the evpn. Re-assign primary json object to fill
         * next evpn information.
         */
        wctx->json = json_mac;
        if (wctx->print_dup)
                hash_iterate(zevpn->mac_table,
                             zebra_evpn_print_dad_mac_hash_detail, wctx);
        else
                hash_iterate(zevpn->mac_table, zebra_evpn_print_mac_hash_detail,
                             wctx);
        wctx->json = json;
        if (json) {
                if (wctx->count)
                        json_object_object_add(json_evpn, "macs", json_mac);
                json_object_object_add(json, vni_str, json_evpn);
        }
}

static void zl3vni_print_nh_hash(struct hash_bucket *bucket, void *ctx)
{
        struct nh_walk_ctx *wctx = NULL;
        struct vty *vty = NULL;
        struct json_object *json_evpn = NULL;
        struct json_object *json_nh = NULL;
        struct zebra_neigh *n = NULL;
        char buf1[ETHER_ADDR_STRLEN];
        char buf2[INET6_ADDRSTRLEN];

        wctx = (struct nh_walk_ctx *)ctx;
        vty = wctx->vty;
        json_evpn = wctx->json;
        if (json_evpn)
                json_nh = json_object_new_object();
        n = (struct zebra_neigh *)bucket->data;

        if (!json_evpn) {
                vty_out(vty, "%-15s %-17s\n",
                        ipaddr2str(&(n->ip), buf2, sizeof(buf2)),
                        prefix_mac2str(&n->emac, buf1, sizeof(buf1)));
        } else {
                json_object_string_add(json_nh, "nexthopIp",
                                       ipaddr2str(&n->ip, buf2, sizeof(buf2)));
                json_object_string_add(
                        json_nh, "routerMac",
                        prefix_mac2str(&n->emac, buf1, sizeof(buf1)));
                json_object_object_add(json_evpn,
                                       ipaddr2str(&(n->ip), buf2, sizeof(buf2)),
                                       json_nh);
        }
}

static void zl3vni_print_nh_hash_all_vni(struct hash_bucket *bucket,
                                         void **args)
{
        struct vty *vty = NULL;
        json_object *json = NULL;
        json_object *json_evpn = NULL;
        struct zebra_l3vni *zl3vni = NULL;
        uint32_t num_nh = 0;
        struct nh_walk_ctx wctx;
        char vni_str[VNI_STR_LEN];

        vty = (struct vty *)args[0];
        json = (struct json_object *)args[1];

        zl3vni = (struct zebra_l3vni *)bucket->data;

        num_nh = hashcount(zl3vni->nh_table);
        if (!num_nh)
                return;

        if (json) {
                json_evpn = json_object_new_object();
                snprintf(vni_str, VNI_STR_LEN, "%u", zl3vni->vni);
        }

        if (json == NULL) {
                vty_out(vty, "\nVNI %u #Next-Hops %u\n\n", zl3vni->vni, num_nh);
                vty_out(vty, "%-15s %-17s\n", "IP", "RMAC");
        } else
                json_object_int_add(json_evpn, "numNextHops", num_nh);

        memset(&wctx, 0, sizeof(wctx));
        wctx.vty = vty;
        wctx.json = json_evpn;
        hash_iterate(zl3vni->nh_table, zl3vni_print_nh_hash, &wctx);
        if (json)
                json_object_object_add(json, vni_str, json_evpn);
}

static void zl3vni_print_rmac_hash_all_vni(struct hash_bucket *bucket,
                                           void **args)
{
        struct vty *vty = NULL;
        json_object *json = NULL;
        json_object *json_evpn = NULL;
        struct zebra_l3vni *zl3vni = NULL;
        uint32_t num_rmacs;
        struct rmac_walk_ctx wctx;
        char vni_str[VNI_STR_LEN];

        vty = (struct vty *)args[0];
        json = (struct json_object *)args[1];

        zl3vni = (struct zebra_l3vni *)bucket->data;

        num_rmacs = hashcount(zl3vni->rmac_table);
        if (!num_rmacs)
                return;

        if (json) {
                json_evpn = json_object_new_object();
                snprintf(vni_str, VNI_STR_LEN, "%u", zl3vni->vni);
        }

        if (json == NULL) {
                vty_out(vty, "\nVNI %u #RMACs %u\n\n", zl3vni->vni, num_rmacs);
                vty_out(vty, "%-17s %-21s\n", "RMAC", "Remote VTEP");
        } else
                json_object_int_add(json_evpn, "numRmacs", num_rmacs);

        /* assign per-vni to wctx->json object to fill macs
         * under the vni. Re-assign primary json object to fill
         * next vni information.
         */
        memset(&wctx, 0, sizeof(wctx));
        wctx.vty = vty;
        wctx.json = json_evpn;
        hash_iterate(zl3vni->rmac_table, zl3vni_print_rmac_hash, &wctx);
        if (json)
                json_object_object_add(json, vni_str, json_evpn);
}

static void zl3vni_print_rmac_hash(struct hash_bucket *bucket, void *ctx)
{
        struct zebra_mac *zrmac = NULL;
        struct rmac_walk_ctx *wctx = NULL;
        struct vty *vty = NULL;
        struct json_object *json = NULL;
        struct json_object *json_rmac = NULL;
        char buf[PREFIX_STRLEN];

        wctx = (struct rmac_walk_ctx *)ctx;
        vty = wctx->vty;
        json = wctx->json;
        if (json)
                json_rmac = json_object_new_object();
        zrmac = (struct zebra_mac *)bucket->data;

        if (!json) {
                vty_out(vty, "%-17s %-21pI4\n",
                        prefix_mac2str(&zrmac->macaddr, buf, sizeof(buf)),
                        &zrmac->fwd_info.r_vtep_ip);
        } else {
                json_object_string_add(
                        json_rmac, "routerMac",
                        prefix_mac2str(&zrmac->macaddr, buf, sizeof(buf)));
                json_object_string_addf(json_rmac, "vtepIp", "%pI4",
                                        &zrmac->fwd_info.r_vtep_ip);
                json_object_object_add(
                        json, prefix_mac2str(&zrmac->macaddr, buf, sizeof(buf)),
                        json_rmac);
        }
}

/* print a specific L3 VNI entry */
static void zl3vni_print(struct zebra_l3vni *zl3vni, void **ctx)
{
        char buf[PREFIX_STRLEN];
        struct vty *vty = NULL;
        json_object *json = NULL;
        struct zebra_evpn *zevpn = NULL;
        json_object *json_evpn_list = NULL;
        struct listnode *node = NULL, *nnode = NULL;

        vty = ctx[0];
        json = ctx[1];

        if (!json) {
                vty_out(vty, "VNI: %u\n", zl3vni->vni);
                vty_out(vty, "  Type: %s\n", "L3");
                vty_out(vty, "  Tenant VRF: %s\n", zl3vni_vrf_name(zl3vni));
                vty_out(vty, "  Vlan: %u\n", zl3vni->vid);
                vty_out(vty, "  Bridge: %s\n",
                        zl3vni->bridge_if ? zl3vni->bridge_if->name : "-");
                vty_out(vty, "  Local Vtep Ip: %pI4\n",
                        &zl3vni->local_vtep_ip);
                vty_out(vty, "  Vxlan-Intf: %s\n",
                        zl3vni_vxlan_if_name(zl3vni));
                vty_out(vty, "  SVI-If: %s\n", zl3vni_svi_if_name(zl3vni));
                vty_out(vty, "  State: %s\n", zl3vni_state2str(zl3vni));
                vty_out(vty, "  VNI Filter: %s\n",
                        CHECK_FLAG(zl3vni->filter, PREFIX_ROUTES_ONLY)
                                ? "prefix-routes-only"
                                : "none");
                vty_out(vty, "  System MAC: %s\n",
                        zl3vni_sysmac2str(zl3vni, buf, sizeof(buf)));
                vty_out(vty, "  Router MAC: %s\n",
                        zl3vni_rmac2str(zl3vni, buf, sizeof(buf)));
                vty_out(vty, "  L2 VNIs: ");
                for (ALL_LIST_ELEMENTS(zl3vni->l2vnis, node, nnode, zevpn))
                        vty_out(vty, "%u ", zevpn->vni);
                vty_out(vty, "\n");
        } else {
                json_evpn_list = json_object_new_array();
                json_object_int_add(json, "vni", zl3vni->vni);
                json_object_string_add(json, "type", "L3");
#if CONFDATE > 20240210
CPP_NOTICE("Drop `vrf` from JSON outputs")
#endif
                json_object_string_add(json, "vrf", zl3vni_vrf_name(zl3vni));
                json_object_string_add(json, "tenantVrf",
                                       zl3vni_vrf_name(zl3vni));
                json_object_string_addf(json, "localVtepIp", "%pI4",
                                        &zl3vni->local_vtep_ip);
                json_object_string_add(json, "vxlanIntf",
                                       zl3vni_vxlan_if_name(zl3vni));
                json_object_string_add(json, "sviIntf",
                                       zl3vni_svi_if_name(zl3vni));
                json_object_string_add(json, "state", zl3vni_state2str(zl3vni));
                json_object_string_add(
                        json, "sysMac",
                        zl3vni_sysmac2str(zl3vni, buf, sizeof(buf)));
                json_object_string_add(
                        json, "routerMac",
                        zl3vni_rmac2str(zl3vni, buf, sizeof(buf)));
                json_object_string_add(
                        json, "vniFilter",
                        CHECK_FLAG(zl3vni->filter, PREFIX_ROUTES_ONLY)
                                ? "prefix-routes-only"
                                : "none");
                for (ALL_LIST_ELEMENTS(zl3vni->l2vnis, node, nnode, zevpn)) {
                        json_object_array_add(json_evpn_list,
                                              json_object_new_int(zevpn->vni));
                }
                json_object_object_add(json, "l2Vnis", json_evpn_list);
        }
}

/* print a L3 VNI hash entry */
static void zl3vni_print_hash(struct hash_bucket *bucket, void *ctx[])
{
        struct vty *vty = NULL;
        json_object *json = NULL;
        json_object *json_evpn = NULL;
        struct zebra_l3vni *zl3vni = NULL;

        vty = (struct vty *)ctx[0];
        json = (json_object *)ctx[1];

        zl3vni = (struct zebra_l3vni *)bucket->data;

        if (!json) {
                vty_out(vty, "%-10u %-4s %-21s %-8lu %-8lu %-15s %-37s\n",
                        zl3vni->vni, "L3", zl3vni_vxlan_if_name(zl3vni),
                        hashcount(zl3vni->rmac_table),
                        hashcount(zl3vni->nh_table), "n/a",
                        zl3vni_vrf_name(zl3vni));
        } else {
                char vni_str[VNI_STR_LEN];

                snprintf(vni_str, VNI_STR_LEN, "%u", zl3vni->vni);
                json_evpn = json_object_new_object();
                json_object_int_add(json_evpn, "vni", zl3vni->vni);
                json_object_string_add(json_evpn, "vxlanIf",
                                       zl3vni_vxlan_if_name(zl3vni));
                json_object_int_add(json_evpn, "numMacs",
                                    hashcount(zl3vni->rmac_table));
                json_object_int_add(json_evpn, "numArpNd",
                                    hashcount(zl3vni->nh_table));
                json_object_string_add(json_evpn, "numRemoteVteps", "n/a");
                json_object_string_add(json_evpn, "type", "L3");
                json_object_string_add(json_evpn, "tenantVrf",
                                       zl3vni_vrf_name(zl3vni));
                json_object_object_add(json, vni_str, json_evpn);
        }
}

/* print a L3 VNI hash entry in detail*/
static void zl3vni_print_hash_detail(struct hash_bucket *bucket, void *data)
{
        struct vty *vty = NULL;
        struct zebra_l3vni *zl3vni = NULL;
        json_object *json_array = NULL;
        bool use_json = false;
        struct zebra_evpn_show *zes = data;

        vty = zes->vty;
        json_array = zes->json;
        use_json = zes->use_json;

        zl3vni = (struct zebra_l3vni *)bucket->data;

        zebra_vxlan_print_vni(vty, zes->zvrf, zl3vni->vni,
                use_json, json_array);

        if (!use_json)
                vty_out(vty, "\n");
}

static int zvni_map_to_svi_ns(struct ns *ns,
                              void *_in_param,
                              void **_p_ifp)
{
        struct zebra_ns *zns = ns->info;
        struct route_node *rn;
        struct zebra_from_svi_param *in_param =
                (struct zebra_from_svi_param *)_in_param;
        struct zebra_l2info_vlan *vl;
        struct interface *tmp_if = NULL;
        struct interface **p_ifp = (struct interface **)_p_ifp;
        struct zebra_if *zif;

        assert(in_param && p_ifp);

        /* TODO: Optimize with a hash. */
        for (rn = route_top(zns->if_table); rn; rn = route_next(rn)) {
                tmp_if = (struct interface *)rn->info;
                /* Check oper status of the SVI. */
                if (!tmp_if || !if_is_operative(tmp_if))
                        continue;
                zif = tmp_if->info;
                if (!zif || zif->zif_type != ZEBRA_IF_VLAN
                    || zif->link != in_param->br_if)
                        continue;
                vl = (struct zebra_l2info_vlan *)&zif->l2info.vl;

                if (vl->vid == in_param->vid) {
                        *p_ifp = tmp_if;
                        return NS_WALK_STOP;
                }
        }
        return NS_WALK_CONTINUE;
}

/* Map to SVI on bridge corresponding to specified VLAN. This can be one
 * of two cases:
 * (a) In the case of a VLAN-aware bridge, the SVI is a L3 VLAN interface
 * linked to the bridge
 * (b) In the case of a VLAN-unaware bridge, the SVI is the bridge interface
 * itself
 */
struct interface *zvni_map_to_svi(vlanid_t vid, struct interface *br_if)
{
        struct interface *tmp_if = NULL;
        struct zebra_if *zif;
        struct zebra_from_svi_param in_param;
        struct interface **p_ifp;
        /* Defensive check, caller expected to invoke only with valid bridge. */
        if (!br_if)
                return NULL;

        /* Determine if bridge is VLAN-aware or not */
        zif = br_if->info;
        assert(zif);
        in_param.bridge_vlan_aware = IS_ZEBRA_IF_BRIDGE_VLAN_AWARE(zif);
        /* Check oper status of the SVI. */
        if (!in_param.bridge_vlan_aware)
                return if_is_operative(br_if) ? br_if : NULL;

        in_param.vid = vid;
        in_param.br_if = br_if;
        in_param.zif = NULL;
        p_ifp = &tmp_if;
        /* Identify corresponding VLAN interface. */
        ns_walk_func(zvni_map_to_svi_ns, (void *)&in_param,
                     (void **)p_ifp);
        return tmp_if;
}

int zebra_evpn_vxlan_del(struct zebra_evpn *zevpn)
{
        zevpn->vid = 0;
        zevpn_vxlan_if_set(zevpn, zevpn->vxlan_if, false /* set */);
        zevpn_bridge_if_set(zevpn, zevpn->bridge_if, false /* set */);

        /* Remove references to the BUM mcast grp */
        zebra_vxlan_sg_deref(zevpn->local_vtep_ip, zevpn->mcast_grp);

        return zebra_evpn_del(zevpn);
}

static int zevpn_build_vni_hash_table(struct zebra_if *zif,
                                      struct zebra_vxlan_vni *vnip, void *arg)
{
        vni_t vni;
        struct zebra_evpn *zevpn;
        struct zebra_l3vni *zl3vni;
        struct interface *ifp;
        struct zebra_l2info_vxlan *vxl;
        struct interface *br_if;

        ifp = zif->ifp;
        vxl = &zif->l2info.vxl;
        vni = vnip->vni;

        if (IS_ZEBRA_DEBUG_VXLAN)
                zlog_debug("Build vni table for vni %u for Intf %s", vni,
                           ifp->name);

        /* L3-VNI and L2-VNI are handled seperately */
        zl3vni = zl3vni_lookup(vni);
        if (zl3vni) {

                if (IS_ZEBRA_DEBUG_VXLAN)
                        zlog_debug(
                                "create L3-VNI hash for Intf %s(%u) L3-VNI %u",
                                ifp->name, ifp->ifindex, vni);

                /* associate with vxlan_if */
                zl3vni->local_vtep_ip = vxl->vtep_ip;
                zl3vni->vxlan_if = ifp;

                /*
                 * we need to associate with SVI.
                 * we can associate with svi-if only after association
                 * with vxlan-intf is complete
                 */
                zl3vni->svi_if = zl3vni_map_to_svi_if(zl3vni);

                /* Associate l3vni to mac-vlan and extract VRR MAC */
                zl3vni->mac_vlan_if = zl3vni_map_to_mac_vlan_if(zl3vni);

                if (IS_ZEBRA_DEBUG_VXLAN)
                        zlog_debug(
                                "create l3vni %u svi_if %s mac_vlan_if %s", vni,
                                zl3vni->svi_if ? zl3vni->svi_if->name : "NIL",
                                zl3vni->mac_vlan_if ? zl3vni->mac_vlan_if->name
                                                    : "NIL");

                if (is_l3vni_oper_up(zl3vni))
                        zebra_vxlan_process_l3vni_oper_up(zl3vni);

        } else {
                struct interface *vlan_if = NULL;

                if (IS_ZEBRA_DEBUG_VXLAN)
                        zlog_debug(
                                "Create L2-VNI hash for intf %s(%u) L2-VNI %u local IP %pI4",
                                ifp->name, ifp->ifindex, vni, &vxl->vtep_ip);

                /*
                 * EVPN hash entry is expected to exist, if the BGP process is
                 * killed
                 */
                zevpn = zebra_evpn_lookup(vni);
                if (zevpn) {
                        zlog_debug(
                                "EVPN hash already present for IF %s(%u) L2-VNI %u",
                                ifp->name, ifp->ifindex, vni);

                        /*
                         * Inform BGP if intf is up and mapped to
                         * bridge.
                         */
                        if (if_is_operative(ifp) && zif->brslave_info.br_if)
                                zebra_evpn_send_add_to_client(zevpn);

                        /* Send Local MAC-entries to client */
                        zebra_evpn_send_mac_list_to_client(zevpn);

                        /* Send Loval Neighbor entries to client */
                        zebra_evpn_send_neigh_to_client(zevpn);
                } else {
                        zevpn = zebra_evpn_add(vni);
                        if (!zevpn) {
                                zlog_debug(
                                        "Failed to add EVPN hash, IF %s(%u) L2-VNI %u",
                                        ifp->name, ifp->ifindex, vni);
                                return 0;
                        }

                        if (zevpn->local_vtep_ip.s_addr != vxl->vtep_ip.s_addr
                            || zevpn->mcast_grp.s_addr
                                       != vnip->mcast_grp.s_addr) {
                                zebra_vxlan_sg_deref(zevpn->local_vtep_ip,
                                                     zevpn->mcast_grp);
                                zebra_vxlan_sg_ref(vxl->vtep_ip,
                                                   vnip->mcast_grp);
                                zevpn->local_vtep_ip = vxl->vtep_ip;
                                zevpn->mcast_grp = vnip->mcast_grp;
                                /* on local vtep-ip check if ES
                                 * orig-ip needs to be updated
                                 */
                                zebra_evpn_es_set_base_evpn(zevpn);
                        }
                        zevpn_vxlan_if_set(zevpn, ifp, true /* set */);
                        br_if = zif->brslave_info.br_if;
                        zevpn_bridge_if_set(zevpn, br_if, true /* set */);
                        vlan_if = zvni_map_to_svi(vnip->access_vlan, br_if);
                        if (vlan_if) {
                                zevpn->vid = vnip->access_vlan;
                                zevpn->svi_if = vlan_if;
                                zevpn->vrf_id = vlan_if->vrf->vrf_id;
                                zl3vni = zl3vni_from_vrf(vlan_if->vrf->vrf_id);
                                if (zl3vni)
                                        listnode_add_sort(zl3vni->l2vnis,
                                                          zevpn);
                        }

                        /*
                         * Inform BGP if intf is up and mapped to
                         * bridge.
                         */
                        if (if_is_operative(ifp) && zif->brslave_info.br_if)
                                zebra_evpn_send_add_to_client(zevpn);
                }
        }

        return 0;
}

static int zevpn_build_hash_table_zns(struct ns *ns,
                                     void *param_in __attribute__((unused)),
                                     void **param_out __attribute__((unused)))
{
        struct zebra_ns *zns = ns->info;
        struct route_node *rn;
        struct interface *ifp;
        struct zebra_vrf *zvrf;

        zvrf = zebra_vrf_get_evpn();

        /* Walk VxLAN interfaces and create EVPN hash. */
        for (rn = route_top(zns->if_table); rn; rn = route_next(rn)) {
                struct zebra_if *zif;
                struct zebra_l2info_vxlan *vxl;

                ifp = (struct interface *)rn->info;
                if (!ifp)
                        continue;
                zif = ifp->info;
                if (!zif || zif->zif_type != ZEBRA_IF_VXLAN)
                        continue;

                vxl = &zif->l2info.vxl;
                /* link of VXLAN interface should be in zebra_evpn_vrf */
                if (zvrf->zns->ns_id != vxl->link_nsid) {
                        if (IS_ZEBRA_DEBUG_VXLAN)
                                zlog_debug(
                                        "Intf %s(%u) link not in same "
                                        "namespace than BGP EVPN core instance ",
                                        ifp->name, ifp->ifindex);
                        continue;
                }

                if (IS_ZEBRA_DEBUG_VXLAN)
                        zlog_debug("Building vni table for %s-if %s",
                                   IS_ZEBRA_VXLAN_IF_VNI(zif) ? "vni" : "svd",
                                   ifp->name);

                zebra_vxlan_if_vni_iterate(zif, zevpn_build_vni_hash_table,
                                           NULL);
        }
        return NS_WALK_CONTINUE;
}

/*
 * Build the VNI hash table by going over the VxLAN interfaces. This
 * is called when EVPN (advertise-all-vni) is enabled.
 */

static void zevpn_build_hash_table(void)
{
        ns_walk_func(zevpn_build_hash_table_zns, NULL, NULL);
}

/*
 * Cleanup EVPN/VTEP and update kernel
 */
static void zebra_evpn_vxlan_cleanup_all(struct hash_bucket *bucket, void *arg)
{
        struct zebra_evpn *zevpn = NULL;
        struct zebra_l3vni *zl3vni = NULL;

        zevpn = (struct zebra_evpn *)bucket->data;

        /* remove l2vni from l2vni's tenant-vrf l3-vni list */
        zl3vni = zl3vni_from_vrf(zevpn->vrf_id);
        if (zl3vni)
                listnode_delete(zl3vni->l2vnis, zevpn);

        zebra_evpn_cleanup_all(bucket, arg);
}

/* cleanup L3VNI */
static void zl3vni_cleanup_all(struct hash_bucket *bucket, void *args)
{
        struct zebra_l3vni *zl3vni = NULL;

        zl3vni = (struct zebra_l3vni *)bucket->data;

        zebra_vxlan_process_l3vni_oper_down(zl3vni);
}

static void rb_find_or_add_host(struct host_rb_tree_entry *hrbe,
                                const struct prefix *host)
{
        struct host_rb_entry lookup;
        struct host_rb_entry *hle;

        memset(&lookup, 0, sizeof(lookup));
        memcpy(&lookup.p, host, sizeof(*host));

        hle = RB_FIND(host_rb_tree_entry, hrbe, &lookup);
        if (hle)
                return;

        hle = XCALLOC(MTYPE_HOST_PREFIX, sizeof(struct host_rb_entry));
        memcpy(hle, &lookup, sizeof(lookup));

        RB_INSERT(host_rb_tree_entry, hrbe, hle);
}

static void rb_delete_host(struct host_rb_tree_entry *hrbe, struct prefix *host)
{
        struct host_rb_entry lookup;
        struct host_rb_entry *hle;

        memset(&lookup, 0, sizeof(lookup));
        memcpy(&lookup.p, host, sizeof(*host));

        hle = RB_FIND(host_rb_tree_entry, hrbe, &lookup);
        if (hle) {
                RB_REMOVE(host_rb_tree_entry, hrbe, hle);
                XFREE(MTYPE_HOST_PREFIX, hle);
        }

        return;
}

/*
 * Look up MAC hash entry.
 */
static struct zebra_mac *zl3vni_rmac_lookup(struct zebra_l3vni *zl3vni,
                                            const struct ethaddr *rmac)
{
        struct zebra_mac tmp;
        struct zebra_mac *pmac;

        memset(&tmp, 0, sizeof(tmp));
        memcpy(&tmp.macaddr, rmac, ETH_ALEN);
        pmac = hash_lookup(zl3vni->rmac_table, &tmp);

        return pmac;
}

/*
 * Callback to allocate RMAC hash entry.
 */
static void *zl3vni_rmac_alloc(void *p)
{
        const struct zebra_mac *tmp_rmac = p;
        struct zebra_mac *zrmac;

        zrmac = XCALLOC(MTYPE_L3VNI_MAC, sizeof(struct zebra_mac));
        *zrmac = *tmp_rmac;

        return ((void *)zrmac);
}

/*
 * Add RMAC entry to l3-vni
 */
static struct zebra_mac *zl3vni_rmac_add(struct zebra_l3vni *zl3vni,
                                         const struct ethaddr *rmac)
{
        struct zebra_mac tmp_rmac;
        struct zebra_mac *zrmac = NULL;

        memset(&tmp_rmac, 0, sizeof(tmp_rmac));
        memcpy(&tmp_rmac.macaddr, rmac, ETH_ALEN);
        zrmac = hash_get(zl3vni->rmac_table, &tmp_rmac, zl3vni_rmac_alloc);
        zrmac->nh_list = list_new();
        zrmac->nh_list->cmp = (int (*)(void *, void *))l3vni_rmac_nh_list_cmp;
        zrmac->nh_list->del = (void (*)(void *))l3vni_rmac_nh_free;

        SET_FLAG(zrmac->flags, ZEBRA_MAC_REMOTE);
        SET_FLAG(zrmac->flags, ZEBRA_MAC_REMOTE_RMAC);

        return zrmac;
}

/*
 * Delete MAC entry.
 */
static int zl3vni_rmac_del(struct zebra_l3vni *zl3vni, struct zebra_mac *zrmac)
{
        struct zebra_mac *tmp_rmac;

        /* free the list of nh list*/
        list_delete(&zrmac->nh_list);

        tmp_rmac = hash_release(zl3vni->rmac_table, zrmac);
        XFREE(MTYPE_L3VNI_MAC, tmp_rmac);

        return 0;
}

/*
 * Install remote RMAC into the forwarding plane.
 */
static int zl3vni_rmac_install(struct zebra_l3vni *zl3vni,
                               struct zebra_mac *zrmac)
{
        const struct zebra_if *zif = NULL, *br_zif = NULL;
        const struct zebra_vxlan_vni *vni;
        const struct interface *br_ifp;
        enum zebra_dplane_result res;
        vlanid_t vid;

        if (!(CHECK_FLAG(zrmac->flags, ZEBRA_MAC_REMOTE))
            || !(CHECK_FLAG(zrmac->flags, ZEBRA_MAC_REMOTE_RMAC)))
                return 0;

        zif = zl3vni->vxlan_if->info;
        if (!zif)
                return -1;

        br_ifp = zif->brslave_info.br_if;
        if (br_ifp == NULL)
                return -1;

        vni = zebra_vxlan_if_vni_find(zif, zl3vni->vni);

        br_zif = (const struct zebra_if *)br_ifp->info;

        if (IS_ZEBRA_IF_BRIDGE_VLAN_AWARE(br_zif))
                vid = vni->access_vlan;
        else
                vid = 0;

        res = dplane_rem_mac_add(zl3vni->vxlan_if, br_ifp, vid, &zrmac->macaddr,
                                 vni->vni, zrmac->fwd_info.r_vtep_ip, 0, 0,
                                 false /*was_static*/);
        if (res != ZEBRA_DPLANE_REQUEST_FAILURE)
                return 0;
        else
                return -1;
}

/*
 * Uninstall remote RMAC from the forwarding plane.
 */
static int zl3vni_rmac_uninstall(struct zebra_l3vni *zl3vni,
                                 struct zebra_mac *zrmac)
{
        const struct zebra_if *zif = NULL, *br_zif;
        const struct zebra_vxlan_vni *vni;
        const struct interface *br_ifp;
        vlanid_t vid;
        enum zebra_dplane_result res;

        if (!(CHECK_FLAG(zrmac->flags, ZEBRA_MAC_REMOTE))
            || !(CHECK_FLAG(zrmac->flags, ZEBRA_MAC_REMOTE_RMAC)))
                return 0;

        if (!zl3vni->vxlan_if) {
                if (IS_ZEBRA_DEBUG_VXLAN)
                        zlog_debug(
                                "RMAC %pEA on L3-VNI %u hash %p couldn't be uninstalled - no vxlan_if",
                                &zrmac->macaddr, zl3vni->vni, zl3vni);
                return -1;
        }

        zif = zl3vni->vxlan_if->info;
        if (!zif)
                return -1;

        br_ifp = zif->brslave_info.br_if;
        if (br_ifp == NULL)
                return -1;

        vni = zebra_vxlan_if_vni_find(zif, zl3vni->vni);

        br_zif = (const struct zebra_if *)br_ifp->info;
        if (IS_ZEBRA_IF_BRIDGE_VLAN_AWARE(br_zif))
                vid = vni->access_vlan;
        else
                vid = 0;

        res = dplane_rem_mac_del(zl3vni->vxlan_if, br_ifp, vid, &zrmac->macaddr,
                                 vni->vni, zrmac->fwd_info.r_vtep_ip);
        if (res != ZEBRA_DPLANE_REQUEST_FAILURE)
                return 0;
        else
                return -1;
}

/* handle rmac add */
static int zl3vni_remote_rmac_add(struct zebra_l3vni *zl3vni,
                                  const struct ethaddr *rmac,
                                  const struct ipaddr *vtep_ip)
{
        struct zebra_mac *zrmac = NULL;
        struct ipaddr *vtep = NULL;

        zrmac = zl3vni_rmac_lookup(zl3vni, rmac);
        if (!zrmac) {

                 /* Create the RMAC entry, or update its vtep, if necessary. */
                zrmac = zl3vni_rmac_add(zl3vni, rmac);
                if (!zrmac) {
                        zlog_debug(
                                "Failed to add RMAC %pEA L3VNI %u Remote VTEP %pIA",
                                rmac, zl3vni->vni, vtep_ip);
                        return -1;
                }
                memset(&zrmac->fwd_info, 0, sizeof(zrmac->fwd_info));
                zrmac->fwd_info.r_vtep_ip = vtep_ip->ipaddr_v4;

                vtep = XCALLOC(MTYPE_EVPN_VTEP, sizeof(struct ipaddr));
                memcpy(vtep, vtep_ip, sizeof(struct ipaddr));
                if (!listnode_add_sort_nodup(zrmac->nh_list, (void *)vtep))
                        XFREE(MTYPE_EVPN_VTEP, vtep);

                /* Send RMAC for FPM processing */
                hook_call(zebra_rmac_update, zrmac, zl3vni, false,
                          "new RMAC added");

                /* install rmac in kernel */
                zl3vni_rmac_install(zl3vni, zrmac);
        } else if (!IPV4_ADDR_SAME(&zrmac->fwd_info.r_vtep_ip,
                                   &vtep_ip->ipaddr_v4)) {
                if (IS_ZEBRA_DEBUG_VXLAN)
                        zlog_debug(
                                "L3VNI %u Remote VTEP change(%pI4 -> %pIA) for RMAC %pEA",
                                zl3vni->vni, &zrmac->fwd_info.r_vtep_ip,
                                vtep_ip, rmac);

                zrmac->fwd_info.r_vtep_ip = vtep_ip->ipaddr_v4;

                vtep = XCALLOC(MTYPE_EVPN_VTEP, sizeof(struct ipaddr));
                memcpy(vtep, vtep_ip, sizeof(struct ipaddr));
                if (!listnode_add_sort_nodup(zrmac->nh_list, (void *)vtep))
                        XFREE(MTYPE_EVPN_VTEP, vtep);

                /* install rmac in kernel */
                zl3vni_rmac_install(zl3vni, zrmac);
        }

        return 0;
}


/* handle rmac delete */
static void zl3vni_remote_rmac_del(struct zebra_l3vni *zl3vni,
                                   struct zebra_mac *zrmac,
                                   struct ipaddr *vtep_ip)
{
        struct ipaddr ipv4_vtep;

        if (!zl3vni_nh_lookup(zl3vni, vtep_ip)) {
                memset(&ipv4_vtep, 0, sizeof(ipv4_vtep));
                ipv4_vtep.ipa_type = IPADDR_V4;
                if (vtep_ip->ipa_type == IPADDR_V6)
                        ipv4_mapped_ipv6_to_ipv4(&vtep_ip->ipaddr_v6,
                                                 &ipv4_vtep.ipaddr_v4);
                else
                        memcpy(&(ipv4_vtep.ipaddr_v4), &vtep_ip->ipaddr_v4,
                               sizeof(struct in_addr));

                /* remove nh from rmac's list */
                l3vni_rmac_nh_list_nh_delete(zl3vni, zrmac, &ipv4_vtep);
                /* delete nh is same as current selected, fall back to
                 * one present in the list
                 */
                if (IPV4_ADDR_SAME(&zrmac->fwd_info.r_vtep_ip,
                                   &ipv4_vtep.ipaddr_v4) &&
                    listcount(zrmac->nh_list)) {
                        struct ipaddr *vtep;

                        vtep = listgetdata(listhead(zrmac->nh_list));
                        zrmac->fwd_info.r_vtep_ip = vtep->ipaddr_v4;
                        if (IS_ZEBRA_DEBUG_VXLAN)
                                zlog_debug(
                                        "L3VNI %u Remote VTEP nh change(%pIA -> %pI4) for RMAC %pEA",
                                        zl3vni->vni, &ipv4_vtep,
                                        &zrmac->fwd_info.r_vtep_ip,
                                        &zrmac->macaddr);

                        /* install rmac in kernel */
                        zl3vni_rmac_install(zl3vni, zrmac);
                }

                if (!listcount(zrmac->nh_list)) {
                        /* uninstall from kernel */
                        zl3vni_rmac_uninstall(zl3vni, zrmac);

                        /* Send RMAC for FPM processing */
                        hook_call(zebra_rmac_update, zrmac, zl3vni, true,
                                  "RMAC deleted");

                        if (IS_ZEBRA_DEBUG_VXLAN)
                                zlog_debug(
                                        "L3VNI %u RMAC %pEA vtep_ip %pIA delete",
                                        zl3vni->vni, &zrmac->macaddr, vtep_ip);

                        /* del the rmac entry */
                        zl3vni_rmac_del(zl3vni, zrmac);
                }
        }
}

/*
 * Look up nh hash entry on a l3-vni.
 */
static struct zebra_neigh *zl3vni_nh_lookup(struct zebra_l3vni *zl3vni,
                                            const struct ipaddr *ip)
{
        struct zebra_neigh tmp;
        struct zebra_neigh *n;

        memset(&tmp, 0, sizeof(tmp));
        memcpy(&tmp.ip, ip, sizeof(struct ipaddr));
        n = hash_lookup(zl3vni->nh_table, &tmp);

        return n;
}


/*
 * Callback to allocate NH hash entry on L3-VNI.
 */
static void *zl3vni_nh_alloc(void *p)
{
        const struct zebra_neigh *tmp_n = p;
        struct zebra_neigh *n;

        n = XCALLOC(MTYPE_L3NEIGH, sizeof(struct zebra_neigh));
        *n = *tmp_n;

        return ((void *)n);
}

/*
 * Add neighbor entry.
 */
static struct zebra_neigh *zl3vni_nh_add(struct zebra_l3vni *zl3vni,
                                         const struct ipaddr *ip,
                                         const struct ethaddr *mac)
{
        struct zebra_neigh tmp_n;
        struct zebra_neigh *n = NULL;

        memset(&tmp_n, 0, sizeof(tmp_n));
        memcpy(&tmp_n.ip, ip, sizeof(struct ipaddr));
        n = hash_get(zl3vni->nh_table, &tmp_n, zl3vni_nh_alloc);

        RB_INIT(host_rb_tree_entry, &n->host_rb);

        memcpy(&n->emac, mac, ETH_ALEN);
        SET_FLAG(n->flags, ZEBRA_NEIGH_REMOTE);
        SET_FLAG(n->flags, ZEBRA_NEIGH_REMOTE_NH);

        return n;
}

/*
 * Delete neighbor entry.
 */
static int zl3vni_nh_del(struct zebra_l3vni *zl3vni, struct zebra_neigh *n)
{
        struct zebra_neigh *tmp_n;
        struct host_rb_entry *hle;

        while (!RB_EMPTY(host_rb_tree_entry, &n->host_rb)) {
                hle = RB_ROOT(host_rb_tree_entry, &n->host_rb);

                RB_REMOVE(host_rb_tree_entry, &n->host_rb, hle);
                XFREE(MTYPE_HOST_PREFIX, hle);
        }

        tmp_n = hash_release(zl3vni->nh_table, n);
        XFREE(MTYPE_L3NEIGH, tmp_n);

        return 0;
}

/*
 * Install remote nh as neigh into the kernel.
 */
static int zl3vni_nh_install(struct zebra_l3vni *zl3vni, struct zebra_neigh *n)
{
        uint8_t flags;
        int ret = 0;

        if (!is_l3vni_oper_up(zl3vni))
                return -1;

        if (!(n->flags & ZEBRA_NEIGH_REMOTE)
            || !(n->flags & ZEBRA_NEIGH_REMOTE_NH))
                return 0;

        flags = DPLANE_NTF_EXT_LEARNED;
        if (n->flags & ZEBRA_NEIGH_ROUTER_FLAG)
                flags |= DPLANE_NTF_ROUTER;

        dplane_rem_neigh_add(zl3vni->svi_if, &n->ip, &n->emac, flags,
                        false /*was_static*/);

        return ret;
}

/*
 * Uninstall remote nh from the kernel.
 */
static int zl3vni_nh_uninstall(struct zebra_l3vni *zl3vni,
                               struct zebra_neigh *n)
{
        if (!(n->flags & ZEBRA_NEIGH_REMOTE)
            || !(n->flags & ZEBRA_NEIGH_REMOTE_NH))
                return 0;

        if (!zl3vni->svi_if || !if_is_operative(zl3vni->svi_if))
                return 0;

        dplane_rem_neigh_delete(zl3vni->svi_if, &n->ip);

        return 0;
}

/* add remote vtep as a neigh entry */
static int zl3vni_remote_nh_add(struct zebra_l3vni *zl3vni,
                                const struct ipaddr *vtep_ip,
                                const struct ethaddr *rmac,
                                const struct prefix *host_prefix)
{
        struct zebra_neigh *nh = NULL;

        /* Create the next hop entry, or update its mac, if necessary. */
        nh = zl3vni_nh_lookup(zl3vni, vtep_ip);
        if (!nh) {
                nh = zl3vni_nh_add(zl3vni, vtep_ip, rmac);
                if (!nh) {
                        zlog_debug(
                                "Failed to add NH %pIA as Neigh (RMAC %pEA L3-VNI %u prefix %pFX)",
                                vtep_ip, rmac, zl3vni->vni, host_prefix);
                        return -1;
                }

                /* install the nh neigh in kernel */
                zl3vni_nh_install(zl3vni, nh);
        } else if (memcmp(&nh->emac, rmac, ETH_ALEN) != 0) {
                if (IS_ZEBRA_DEBUG_VXLAN)
                        zlog_debug(
                                "L3VNI %u RMAC change(%pEA --> %pEA) for nexthop %pIA, prefix %pFX",
                                zl3vni->vni, &nh->emac, rmac, vtep_ip,
                                host_prefix);

                memcpy(&nh->emac, rmac, ETH_ALEN);
                /* install (update) the nh neigh in kernel */
                zl3vni_nh_install(zl3vni, nh);
        }

        rb_find_or_add_host(&nh->host_rb, host_prefix);

        return 0;
}

/* handle nh neigh delete */
static void zl3vni_remote_nh_del(struct zebra_l3vni *zl3vni,
                                 struct zebra_neigh *nh,
                                 struct prefix *host_prefix)
{
        rb_delete_host(&nh->host_rb, host_prefix);

        if (RB_EMPTY(host_rb_tree_entry, &nh->host_rb)) {
                /* uninstall from kernel */
                zl3vni_nh_uninstall(zl3vni, nh);

                /* delete the nh entry */
                zl3vni_nh_del(zl3vni, nh);
        }
}

/* handle neigh update from kernel - the only thing of interest is to
 * readd stale entries.
 */
static int zl3vni_local_nh_add_update(struct zebra_l3vni *zl3vni,
                                      struct ipaddr *ip, uint16_t state)
{
#ifdef GNU_LINUX
        struct zebra_neigh *n = NULL;

        n = zl3vni_nh_lookup(zl3vni, ip);
        if (!n)
                return 0;

        /* all next hop neigh are remote and installed by frr.
         * If the kernel has aged this entry, re-install.
         */
        if (state & NUD_STALE)
                zl3vni_nh_install(zl3vni, n);
#endif
        return 0;
}

/* handle neigh delete from kernel */
static int zl3vni_local_nh_del(struct zebra_l3vni *zl3vni, struct ipaddr *ip)
{
        struct zebra_neigh *n = NULL;

        n = zl3vni_nh_lookup(zl3vni, ip);
        if (!n)
                return 0;

        /* all next hop neigh are remote and installed by frr.
         * If we get an age out notification for these neigh entries, we have to
         * install it back
         */
        zl3vni_nh_install(zl3vni, n);

        return 0;
}

/*
 * Hash function for L3 VNI.
 */
static unsigned int l3vni_hash_keymake(const void *p)
{
        const struct zebra_l3vni *zl3vni = p;

        return jhash_1word(zl3vni->vni, 0);
}

/*
 * Compare 2 L3 VNI hash entries.
 */
static bool l3vni_hash_cmp(const void *p1, const void *p2)
{
        const struct zebra_l3vni *zl3vni1 = p1;
        const struct zebra_l3vni *zl3vni2 = p2;

        return (zl3vni1->vni == zl3vni2->vni);
}

/*
 * Callback to allocate L3 VNI hash entry.
 */
static void *zl3vni_alloc(void *p)
{
        struct zebra_l3vni *zl3vni = NULL;
        const struct zebra_l3vni *tmp_l3vni = p;

        zl3vni = XCALLOC(MTYPE_ZL3VNI, sizeof(struct zebra_l3vni));
        zl3vni->vni = tmp_l3vni->vni;
        return ((void *)zl3vni);
}

/*
 * Look up L3 VNI hash entry.
 */
struct zebra_l3vni *zl3vni_lookup(vni_t vni)
{
        struct zebra_l3vni tmp_l3vni;
        struct zebra_l3vni *zl3vni = NULL;

        memset(&tmp_l3vni, 0, sizeof(tmp_l3vni));
        tmp_l3vni.vni = vni;
        zl3vni = hash_lookup(zrouter.l3vni_table, &tmp_l3vni);

        return zl3vni;
}

/*
 * Add L3 VNI hash entry.
 */
static struct zebra_l3vni *zl3vni_add(vni_t vni, vrf_id_t vrf_id)
{
        struct zebra_l3vni tmp_zl3vni;
        struct zebra_l3vni *zl3vni = NULL;

        memset(&tmp_zl3vni, 0, sizeof(tmp_zl3vni));
        tmp_zl3vni.vni = vni;

        zl3vni = hash_get(zrouter.l3vni_table, &tmp_zl3vni, zl3vni_alloc);

        zl3vni->vrf_id = vrf_id;
        zl3vni->svi_if = NULL;
        zl3vni->vxlan_if = NULL;
        zl3vni->l2vnis = list_new();
        zl3vni->l2vnis->cmp = zebra_evpn_list_cmp;

        /* Create hash table for remote RMAC */
        zl3vni->rmac_table = zebra_mac_db_create("Zebra L3-VNI RMAC-Table");

        /* Create hash table for neighbors */
        zl3vni->nh_table = zebra_neigh_db_create("Zebra L3-VNI next-hop table");

        return zl3vni;
}

/*
 * Delete L3 VNI hash entry.
 */
static int zl3vni_del(struct zebra_l3vni *zl3vni)
{
        struct zebra_l3vni *tmp_zl3vni;

        /* free the list of l2vnis */
        list_delete(&zl3vni->l2vnis);
        zl3vni->l2vnis = NULL;

        /* Free the rmac table */
        hash_free(zl3vni->rmac_table);
        zl3vni->rmac_table = NULL;

        /* Free the nh table */
        hash_free(zl3vni->nh_table);
        zl3vni->nh_table = NULL;

        /* Free the VNI hash entry and allocated memory. */
        tmp_zl3vni = hash_release(zrouter.l3vni_table, zl3vni);
        XFREE(MTYPE_ZL3VNI, tmp_zl3vni);

        return 0;
}

static int zl3vni_map_to_vxlan_if_ns(struct ns *ns,
                                     void *_zl3vni,
                                     void **_pifp)
{
        struct zebra_ns *zns = ns->info;
        struct zebra_l3vni *zl3vni = (struct zebra_l3vni *)_zl3vni;
        struct route_node *rn = NULL;
        struct interface *ifp = NULL;
        struct zebra_vrf *zvrf;

        zvrf = zebra_vrf_get_evpn();

        assert(_pifp);

        /* loop through all vxlan-interface */
        for (rn = route_top(zns->if_table); rn; rn = route_next(rn)) {

                struct zebra_if *zif = NULL;
                struct zebra_l2info_vxlan *vxl;
                struct zebra_vxlan_vni *vni = NULL;

                ifp = (struct interface *)rn->info;
                if (!ifp)
                        continue;

                zif = ifp->info;
                if (!zif || zif->zif_type != ZEBRA_IF_VXLAN)
                        continue;

                vxl = &zif->l2info.vxl;
                vni = zebra_vxlan_if_vni_find(zif, zl3vni->vni);
                if (!vni || vni->vni != zl3vni->vni)
                        continue;

                /* link of VXLAN interface should be in zebra_evpn_vrf */
                if (zvrf->zns->ns_id != vxl->link_nsid) {
                        if (IS_ZEBRA_DEBUG_VXLAN)
                                zlog_debug(
                                        "Intf %s(%u) VNI %u, link not in same "
                                        "namespace than BGP EVPN core instance ",
                                        ifp->name, ifp->ifindex, vni->vni);
                        continue;
                }


                zl3vni->local_vtep_ip = zif->l2info.vxl.vtep_ip;
                *_pifp = (void *)ifp;
                return NS_WALK_STOP;
        }

        return NS_WALK_CONTINUE;
}

struct interface *zl3vni_map_to_vxlan_if(struct zebra_l3vni *zl3vni)
{
        struct interface **p_ifp;
        struct interface *ifp = NULL;

        p_ifp = &ifp;

        ns_walk_func(zl3vni_map_to_vxlan_if_ns,
                     (void *)zl3vni, (void **)p_ifp);
        return ifp;
}

struct interface *zl3vni_map_to_svi_if(struct zebra_l3vni *zl3vni)
{
        struct zebra_if *zif = NULL;       /* zebra_if for vxlan_if */
        struct zebra_vxlan_vni *vni = NULL; /* vni info in vxlan_if */

        if (!zl3vni)
                return NULL;

        if (!zl3vni->vxlan_if)
                return NULL;

        zif = zl3vni->vxlan_if->info;
        if (!zif)
                return NULL;

        vni = zebra_vxlan_if_vni_find(zif, zl3vni->vni);
        if (!vni)
                return NULL;

        return zvni_map_to_svi(vni->access_vlan, zif->brslave_info.br_if);
}

struct interface *zl3vni_map_to_mac_vlan_if(struct zebra_l3vni *zl3vni)
{
        struct zebra_if *zif = NULL;       /* zebra_if for vxlan_if */

        if (!zl3vni)
                return NULL;

        if (!zl3vni->vxlan_if)
                return NULL;

        zif = zl3vni->vxlan_if->info;
        if (!zif)
                return NULL;

        return zebra_evpn_map_to_macvlan(zif->brslave_info.br_if,
                                         zl3vni->svi_if);
}


struct zebra_l3vni *zl3vni_from_vrf(vrf_id_t vrf_id)
{
        struct zebra_vrf *zvrf = NULL;

        zvrf = zebra_vrf_lookup_by_id(vrf_id);
        if (!zvrf)
                return NULL;

        return zl3vni_lookup(zvrf->l3vni);
}

static int zl3vni_from_svi_ns(struct ns *ns, void *_in_param, void **_p_zl3vni)
{
        int found = 0;
        vni_t vni_id = 0;
        struct zebra_ns *zns = ns->info;
        struct zebra_l3vni **p_zl3vni = (struct zebra_l3vni **)_p_zl3vni;
        struct zebra_from_svi_param *in_param =
                (struct zebra_from_svi_param *)_in_param;
        struct route_node *rn = NULL;
        struct interface *tmp_if = NULL;
        struct zebra_if *zif = NULL;
        struct zebra_if *br_zif = NULL;

        assert(in_param && p_zl3vni);

        br_zif = in_param->br_if->info;
        assert(br_zif);

        if (in_param->bridge_vlan_aware) {
                vni_id = zebra_l2_bridge_if_vni_find(br_zif, in_param->vid);
                if (vni_id)
                        found = 1;
        } else {
                /* loop through all vxlan-interface */
                for (rn = route_top(zns->if_table); rn; rn = route_next(rn)) {
                        tmp_if = (struct interface *)rn->info;
                        if (!tmp_if)
                                continue;
                        zif = tmp_if->info;
                        if (!zif || zif->zif_type != ZEBRA_IF_VXLAN)
                                continue;
                        if (!if_is_operative(tmp_if))
                                continue;

                        if (zif->brslave_info.br_if != in_param->br_if)
                                continue;

                        vni_id = zebra_vxlan_if_access_vlan_vni_find(
                                        zif, in_param->br_if);
                        if (vni_id) {
                                found = 1;
                                break;
                        }
                }
        }

        if (!found)
                return NS_WALK_CONTINUE;

        *p_zl3vni = zl3vni_lookup(vni_id);
        return NS_WALK_STOP;
}

/*
 * Map SVI and associated bridge to a VNI. This is invoked upon getting
 * neighbor notifications, to see if they are of interest.
 */
static struct zebra_l3vni *zl3vni_from_svi(struct interface *ifp,
                                           struct interface *br_if)
{
        struct zebra_l3vni *zl3vni = NULL;
        struct zebra_if *zif = NULL;
        struct zebra_from_svi_param in_param = {};
        struct zebra_l3vni **p_zl3vni;

        if (!br_if)
                return NULL;

        /* Make sure the linked interface is a bridge. */
        if (!IS_ZEBRA_IF_BRIDGE(br_if))
                return NULL;
        in_param.br_if = br_if;

        /* Determine if bridge is VLAN-aware or not */
        zif = br_if->info;
        assert(zif);
        in_param.bridge_vlan_aware = IS_ZEBRA_IF_BRIDGE_VLAN_AWARE(zif);
        if (in_param.bridge_vlan_aware) {
                struct zebra_l2info_vlan *vl;

                if (!IS_ZEBRA_IF_VLAN(ifp))
                        return NULL;

                zif = ifp->info;
                assert(zif);
                vl = &zif->l2info.vl;
                in_param.vid = vl->vid;
        }

        /* See if this interface (or interface plus VLAN Id) maps to a VxLAN */
        /* TODO: Optimize with a hash. */

        p_zl3vni = &zl3vni;

        ns_walk_func(zl3vni_from_svi_ns, (void *)&in_param, (void **)p_zl3vni);
        return zl3vni;
}

vni_t vni_id_from_svi(struct interface *ifp, struct interface *br_if)
{
        vni_t vni = 0;
        struct zebra_evpn *zevpn = NULL;
        struct zebra_l3vni *zl3vni = NULL;

        /* Check if an L3VNI belongs to this SVI interface.
         * If not, check if an L2VNI belongs to this SVI interface.
         */
        zl3vni = zl3vni_from_svi(ifp, br_if);
        if (zl3vni)
                vni = zl3vni->vni;
        else {
                zevpn = zebra_evpn_from_svi(ifp, br_if);
                if (zevpn)
                        vni = zevpn->vni;
        }

        return vni;
}

static inline void zl3vni_get_vrr_rmac(struct zebra_l3vni *zl3vni,
                                       struct ethaddr *rmac)
{
        if (!zl3vni)
                return;

        if (!is_l3vni_oper_up(zl3vni))
                return;

        if (zl3vni->mac_vlan_if && if_is_operative(zl3vni->mac_vlan_if))
                memcpy(rmac->octet, zl3vni->mac_vlan_if->hw_addr, ETH_ALEN);
}

/*
 * Inform BGP about l3-vni.
 */
static int zl3vni_send_add_to_client(struct zebra_l3vni *zl3vni)
{
        struct stream *s = NULL;
        struct zserv *client = NULL;
        struct ethaddr svi_rmac, vrr_rmac = {.octet = {0} };
        struct zebra_vrf *zvrf;
        bool is_anycast_mac = true;

        client = zserv_find_client(ZEBRA_ROUTE_BGP, 0);
        /* BGP may not be running. */
        if (!client)
                return 0;

        zvrf = zebra_vrf_lookup_by_id(zl3vni->vrf_id);
        assert(zvrf);

        /* get the svi and vrr rmac values */
        memset(&svi_rmac, 0, sizeof(svi_rmac));
        zl3vni_get_svi_rmac(zl3vni, &svi_rmac);
        zl3vni_get_vrr_rmac(zl3vni, &vrr_rmac);

        /* In absence of vrr mac use svi mac as anycast MAC value */
        if (is_zero_mac(&vrr_rmac)) {
                memcpy(&vrr_rmac, &svi_rmac, ETH_ALEN);
                is_anycast_mac = false;
        }

        s = stream_new(ZEBRA_MAX_PACKET_SIZ);

        /* The message is used for both vni add and/or update like
         * vrr mac is added for l3vni SVI.
         */
        zclient_create_header(s, ZEBRA_L3VNI_ADD, zl3vni_vrf_id(zl3vni));
        stream_putl(s, zl3vni->vni);
        stream_put(s, &svi_rmac, sizeof(struct ethaddr));
        stream_put_in_addr(s, &zl3vni->local_vtep_ip);
        stream_put(s, &zl3vni->filter, sizeof(int));
        stream_putl(s, zl3vni->svi_if->ifindex);
        stream_put(s, &vrr_rmac, sizeof(struct ethaddr));
        stream_putl(s, is_anycast_mac);

        /* Write packet size. */
        stream_putw_at(s, 0, stream_get_endp(s));

        if (IS_ZEBRA_DEBUG_VXLAN)
                zlog_debug(
                        "Send L3_VNI_ADD %u VRF %s RMAC %pEA VRR %pEA local-ip %pI4 filter %s to %s",
                        zl3vni->vni, vrf_id_to_name(zl3vni_vrf_id(zl3vni)),
                        &svi_rmac, &vrr_rmac, &zl3vni->local_vtep_ip,
                        CHECK_FLAG(zl3vni->filter, PREFIX_ROUTES_ONLY)
                                ? "prefix-routes-only"
                                : "none",
                        zebra_route_string(client->proto));

        client->l3vniadd_cnt++;
        return zserv_send_message(client, s);
}

/*
 * Inform BGP about local l3-VNI deletion.
 */
static int zl3vni_send_del_to_client(struct zebra_l3vni *zl3vni)
{
        struct stream *s = NULL;
        struct zserv *client = NULL;

        client = zserv_find_client(ZEBRA_ROUTE_BGP, 0);
        /* BGP may not be running. */
        if (!client)
                return 0;

        s = stream_new(ZEBRA_MAX_PACKET_SIZ);

        zclient_create_header(s, ZEBRA_L3VNI_DEL, zl3vni_vrf_id(zl3vni));
        stream_putl(s, zl3vni->vni);

        /* Write packet size. */
        stream_putw_at(s, 0, stream_get_endp(s));

        if (IS_ZEBRA_DEBUG_VXLAN)
                zlog_debug("Send L3_VNI_DEL %u VRF %s to %s", zl3vni->vni,
                           vrf_id_to_name(zl3vni_vrf_id(zl3vni)),
                           zebra_route_string(client->proto));

        client->l3vnidel_cnt++;
        return zserv_send_message(client, s);
}

void zebra_vxlan_process_l3vni_oper_up(struct zebra_l3vni *zl3vni)
{
        if (!zl3vni)
                return;

        /* send l3vni add to BGP */
        zl3vni_send_add_to_client(zl3vni);
}

void zebra_vxlan_process_l3vni_oper_down(struct zebra_l3vni *zl3vni)
{
        if (!zl3vni)
                return;

        /* send l3-vni del to BGP*/
        zl3vni_send_del_to_client(zl3vni);
}

static void zevpn_add_to_l3vni_list(struct hash_bucket *bucket, void *ctxt)
{
        struct zebra_evpn *zevpn = (struct zebra_evpn *)bucket->data;
        struct zebra_l3vni *zl3vni = (struct zebra_l3vni *)ctxt;

        if (zevpn->vrf_id == zl3vni_vrf_id(zl3vni))
                listnode_add_sort(zl3vni->l2vnis, zevpn);
}

/*
 * Handle transition of vni from l2 to l3 and vice versa.
 * This function handles only the L2VNI add/delete part of
 * the above transition.
 * L3VNI add/delete is handled by the calling functions.
 */
static int zebra_vxlan_handle_vni_transition(struct zebra_vrf *zvrf, vni_t vni,
                                             int add)
{
        struct zebra_evpn *zevpn = NULL;
        struct zebra_l3vni *zl3vni = NULL;

        /* There is a possibility that VNI notification was already received
         * from kernel and we programmed it as L2-VNI
         * In such a case we need to delete this L2-VNI first, so
         * that it can be reprogrammed as L3-VNI in the system. It is also
         * possible that the vrf-vni mapping is removed from FRR while the vxlan
         * interface is still present in kernel. In this case to keep it
         * symmetric, we will delete the l3-vni and reprogram it as l2-vni
         */
        if (add) {
                /* Locate hash entry */
                zevpn = zebra_evpn_lookup(vni);
                if (!zevpn)
                        return 0;

                if (IS_ZEBRA_DEBUG_VXLAN)
                        zlog_debug("Del L2-VNI %u - transition to L3-VNI", vni);

                /* Delete EVPN from BGP. */
                zebra_evpn_send_del_to_client(zevpn);

                zebra_evpn_neigh_del_all(zevpn, 0, 0, DEL_ALL_NEIGH);
                zebra_evpn_mac_del_all(zevpn, 0, 0, DEL_ALL_MAC);

                /* Free up all remote VTEPs, if any. */
                zebra_evpn_vtep_del_all(zevpn, 1);

                zl3vni = zl3vni_from_vrf(zevpn->vrf_id);
                if (zl3vni)
                        listnode_delete(zl3vni->l2vnis, zevpn);

                /* Delete the hash entry. */
                if (zebra_evpn_vxlan_del(zevpn)) {
                        flog_err(EC_ZEBRA_VNI_DEL_FAILED,
                                 "Failed to del EVPN hash %p, VNI %u", zevpn,
                                 zevpn->vni);
                        return -1;
                }
        } else {
                struct zebra_ns *zns;
                struct route_node *rn;
                struct interface *ifp;
                struct zebra_if *zif;
                struct zebra_vxlan_vni *vnip;
                struct zebra_l2info_vxlan *vxl;
                struct interface *vlan_if;
                bool found = false;

                if (IS_ZEBRA_DEBUG_VXLAN)
                        zlog_debug("Adding L2-VNI %u - transition from L3-VNI",
                                   vni);

                /* Find VxLAN interface for this VNI. */
                zns = zebra_ns_lookup(NS_DEFAULT);
                for (rn = route_top(zns->if_table); rn; rn = route_next(rn)) {
                        ifp = (struct interface *)rn->info;
                        if (!ifp)
                                continue;
                        zif = ifp->info;
                        if (!zif || zif->zif_type != ZEBRA_IF_VXLAN)
                                continue;

                        vxl = &zif->l2info.vxl;
                        vnip = zebra_vxlan_if_vni_find(zif, vni);
                        if (vnip) {
                                found = true;
                                break;
                        }
                }

                if (!found) {
                        if (IS_ZEBRA_DEBUG_VXLAN)
                                zlog_err(
                                        "Adding L2-VNI - Failed to find VxLAN interface for VNI %u",
                                        vni);
                        return -1;
                }

                /* Create VNI hash entry for L2VNI */
                zevpn = zebra_evpn_lookup(vni);
                if (zevpn)
                        return 0;

                zevpn = zebra_evpn_add(vni);

                /* Find bridge interface for the VNI */
                vlan_if = zvni_map_to_svi(vnip->access_vlan,
                                          zif->brslave_info.br_if);
                if (vlan_if) {
                        zevpn->vrf_id = vlan_if->vrf->vrf_id;
                        zl3vni = zl3vni_from_vrf(vlan_if->vrf->vrf_id);
                        if (zl3vni)
                                listnode_add_sort_nodup(zl3vni->l2vnis, zevpn);
                }

                zevpn->vxlan_if = ifp;
                zevpn->local_vtep_ip = vxl->vtep_ip;

                /* Inform BGP if the VNI is up and mapped to a bridge. */
                if (if_is_operative(ifp) && zif->brslave_info.br_if) {
                        zebra_evpn_send_add_to_client(zevpn);
                        zebra_evpn_read_mac_neigh(zevpn, ifp);
                }
        }

        return 0;
}

/* delete and uninstall rmac hash entry */
static void zl3vni_del_rmac_hash_entry(struct hash_bucket *bucket, void *ctx)
{
        struct zebra_mac *zrmac = NULL;
        struct zebra_l3vni *zl3vni = NULL;

        zrmac = (struct zebra_mac *)bucket->data;
        zl3vni = (struct zebra_l3vni *)ctx;
        zl3vni_rmac_uninstall(zl3vni, zrmac);

        /* Send RMAC for FPM processing */
        hook_call(zebra_rmac_update, zrmac, zl3vni, true, "RMAC deleted");

        zl3vni_rmac_del(zl3vni, zrmac);
}

/* delete and uninstall nh hash entry */
static void zl3vni_del_nh_hash_entry(struct hash_bucket *bucket, void *ctx)
{
        struct zebra_neigh *n = NULL;
        struct zebra_l3vni *zl3vni = NULL;

        n = (struct zebra_neigh *)bucket->data;
        zl3vni = (struct zebra_l3vni *)ctx;
        zl3vni_nh_uninstall(zl3vni, n);
        zl3vni_nh_del(zl3vni, n);
}

/* re-add remote rmac if needed */
static int zebra_vxlan_readd_remote_rmac(struct zebra_l3vni *zl3vni,
                                         struct ethaddr *rmac)
{
        struct zebra_mac *zrmac = NULL;

        zrmac = zl3vni_rmac_lookup(zl3vni, rmac);
        if (!zrmac)
                return 0;

        if (IS_ZEBRA_DEBUG_VXLAN)
                zlog_debug("Del remote RMAC %pEA L3VNI %u - readd",
                           rmac, zl3vni->vni);

        zl3vni_rmac_install(zl3vni, zrmac);
        return 0;
}

/* Public functions */

int is_l3vni_for_prefix_routes_only(vni_t vni)
{
        struct zebra_l3vni *zl3vni = NULL;

        zl3vni = zl3vni_lookup(vni);
        if (!zl3vni)
                return 0;

        return CHECK_FLAG(zl3vni->filter, PREFIX_ROUTES_ONLY) ? 1 : 0;
}

/* handle evpn route in vrf table */
void zebra_vxlan_evpn_vrf_route_add(vrf_id_t vrf_id, const struct ethaddr *rmac,
                                    const struct ipaddr *vtep_ip,
                                    const struct prefix *host_prefix)
{
        struct zebra_l3vni *zl3vni = NULL;
        struct ipaddr ipv4_vtep;

        zl3vni = zl3vni_from_vrf(vrf_id);
        if (!zl3vni || !is_l3vni_oper_up(zl3vni))
                return;

        /*
         * add the next hop neighbor -
         * neigh to be installed is the ipv6 nexthop neigh
         */
        zl3vni_remote_nh_add(zl3vni, vtep_ip, rmac, host_prefix);

        /*
         * if the remote vtep is a ipv4 mapped ipv6 address convert it to ipv4
         * address. Rmac is programmed against the ipv4 vtep because we only
         * support ipv4 tunnels in the h/w right now
         */
        memset(&ipv4_vtep, 0, sizeof(ipv4_vtep));
        ipv4_vtep.ipa_type = IPADDR_V4;
        if (vtep_ip->ipa_type == IPADDR_V6)
                ipv4_mapped_ipv6_to_ipv4(&vtep_ip->ipaddr_v6,
                                         &(ipv4_vtep.ipaddr_v4));
        else
                memcpy(&(ipv4_vtep.ipaddr_v4), &vtep_ip->ipaddr_v4,
                       sizeof(struct in_addr));

        /*
         * add the rmac - remote rmac to be installed is against the ipv4
         * nexthop address
         */
        zl3vni_remote_rmac_add(zl3vni, rmac, &ipv4_vtep);
}

/* handle evpn vrf route delete */
void zebra_vxlan_evpn_vrf_route_del(vrf_id_t vrf_id,
                                    struct ipaddr *vtep_ip,
                                    struct prefix *host_prefix)
{
        struct zebra_l3vni *zl3vni = NULL;
        struct zebra_neigh *nh = NULL;
        struct zebra_mac *zrmac = NULL;

        zl3vni = zl3vni_from_vrf(vrf_id);
        if (!zl3vni)
                return;

        /* find the next hop entry and rmac entry */
        nh = zl3vni_nh_lookup(zl3vni, vtep_ip);
        if (!nh)
                return;
        zrmac = zl3vni_rmac_lookup(zl3vni, &nh->emac);

        /* delete the next hop entry */
        zl3vni_remote_nh_del(zl3vni, nh, host_prefix);

        /* delete the rmac entry */
        if (zrmac)
                zl3vni_remote_rmac_del(zl3vni, zrmac, vtep_ip);
}

void zebra_vxlan_print_specific_rmac_l3vni(struct vty *vty, vni_t l3vni,
                                           struct ethaddr *rmac, bool use_json)
{
        struct zebra_l3vni *zl3vni = NULL;
        struct zebra_mac *zrmac = NULL;
        json_object *json = NULL;

        if (!is_evpn_enabled()) {
                if (use_json)
                        vty_out(vty, "{}\n");
                return;
        }

        if (use_json)
                json = json_object_new_object();

        zl3vni = zl3vni_lookup(l3vni);
        if (!zl3vni) {
                if (use_json)
                        vty_out(vty, "{}\n");
                else
                        vty_out(vty, "%% L3-VNI %u doesn't exist\n", l3vni);
                return;
        }

        zrmac = zl3vni_rmac_lookup(zl3vni, rmac);
        if (!zrmac) {
                if (use_json)
                        vty_out(vty, "{}\n");
                else
                        vty_out(vty,
                                "%% Requested RMAC doesn't exist in L3-VNI %u\n",
                                l3vni);
                return;
        }

        zl3vni_print_rmac(zrmac, vty, json);

        if (use_json)
                vty_json(vty, json);
}

void zebra_vxlan_print_rmacs_l3vni(struct vty *vty, vni_t l3vni, bool use_json)
{
        struct zebra_l3vni *zl3vni;
        uint32_t num_rmacs;
        struct rmac_walk_ctx wctx;
        json_object *json = NULL;

        if (!is_evpn_enabled())
                return;

        zl3vni = zl3vni_lookup(l3vni);
        if (!zl3vni) {
                if (use_json)
                        vty_out(vty, "{}\n");
                else
                        vty_out(vty, "%% L3-VNI %u does not exist\n", l3vni);
                return;
        }
        num_rmacs = hashcount(zl3vni->rmac_table);
        if (!num_rmacs)
                return;

        if (use_json)
                json = json_object_new_object();

        memset(&wctx, 0, sizeof(wctx));
        wctx.vty = vty;
        wctx.json = json;
        if (!use_json) {
                vty_out(vty, "Number of Remote RMACs known for this VNI: %u\n",
                        num_rmacs);
                vty_out(vty, "%-17s %-21s\n", "MAC", "Remote VTEP");
        } else
                json_object_int_add(json, "numRmacs", num_rmacs);

        hash_iterate(zl3vni->rmac_table, zl3vni_print_rmac_hash, &wctx);

        if (use_json)
                vty_json(vty, json);
}

void zebra_vxlan_print_rmacs_all_l3vni(struct vty *vty, bool use_json)
{
        json_object *json = NULL;
        void *args[2];

        if (!is_evpn_enabled()) {
                if (use_json)
                        vty_out(vty, "{}\n");
                return;
        }

        if (use_json)
                json = json_object_new_object();

        args[0] = vty;
        args[1] = json;
        hash_iterate(zrouter.l3vni_table,
                     (void (*)(struct hash_bucket *,
                               void *))zl3vni_print_rmac_hash_all_vni,
                     args);

        if (use_json)
                vty_json(vty, json);
}

void zebra_vxlan_print_specific_nh_l3vni(struct vty *vty, vni_t l3vni,
                                         struct ipaddr *ip, bool use_json)
{
        struct zebra_l3vni *zl3vni = NULL;
        struct zebra_neigh *n = NULL;
        json_object *json = NULL;

        if (!is_evpn_enabled()) {
                if (use_json)
                        vty_out(vty, "{}\n");
                return;
        }

        if (use_json)
                json = json_object_new_object();

        zl3vni = zl3vni_lookup(l3vni);
        if (!zl3vni) {
                if (use_json)
                        vty_out(vty, "{}\n");
                else
                        vty_out(vty, "%% L3-VNI %u does not exist\n", l3vni);
                return;
        }

        n = zl3vni_nh_lookup(zl3vni, ip);
        if (!n) {
                if (use_json)
                        vty_out(vty, "{}\n");
                else
                        vty_out(vty,
                                "%% Requested next-hop not present for L3-VNI %u",
                                l3vni);
                return;
        }

        zl3vni_print_nh(n, vty, json);

        if (use_json)
                vty_json(vty, json);
}

void zebra_vxlan_print_nh_l3vni(struct vty *vty, vni_t l3vni, bool use_json)
{
        uint32_t num_nh;
        struct nh_walk_ctx wctx;
        json_object *json = NULL;
        struct zebra_l3vni *zl3vni = NULL;

        if (!is_evpn_enabled())
                return;

        zl3vni = zl3vni_lookup(l3vni);
        if (!zl3vni) {
                if (use_json)
                        vty_out(vty, "{}\n");
                else
                        vty_out(vty, "%% L3-VNI %u does not exist\n", l3vni);
                return;
        }

        num_nh = hashcount(zl3vni->nh_table);
        if (!num_nh)
                return;

        if (use_json)
                json = json_object_new_object();

        wctx.vty = vty;
        wctx.json = json;
        if (!use_json) {
                vty_out(vty, "Number of NH Neighbors known for this VNI: %u\n",
                        num_nh);
                vty_out(vty, "%-15s %-17s\n", "IP", "RMAC");
        } else
                json_object_int_add(json, "numNextHops", num_nh);

        hash_iterate(zl3vni->nh_table, zl3vni_print_nh_hash, &wctx);

        if (use_json)
                vty_json(vty, json);
}

void zebra_vxlan_print_nh_all_l3vni(struct vty *vty, bool use_json)
{
        json_object *json = NULL;
        void *args[2];

        if (!is_evpn_enabled()) {
                if (use_json)
                        vty_out(vty, "{}\n");
                return;
        }

        if (use_json)
                json = json_object_new_object();

        args[0] = vty;
        args[1] = json;
        hash_iterate(zrouter.l3vni_table,
                     (void (*)(struct hash_bucket *,
                               void *))zl3vni_print_nh_hash_all_vni,
                     args);

        if (use_json)
                vty_json(vty, json);
}

/*
 * Display L3 VNI information (VTY command handler).
 */
void zebra_vxlan_print_l3vni(struct vty *vty, vni_t vni, bool use_json)
{
        void *args[2];
        json_object *json = NULL;
        struct zebra_l3vni *zl3vni = NULL;

        if (!is_evpn_enabled()) {
                if (use_json)
                        vty_out(vty, "{}\n");
                return;
        }

        zl3vni = zl3vni_lookup(vni);
        if (!zl3vni) {
                if (use_json)
                        vty_out(vty, "{}\n");
                else
                        vty_out(vty, "%% VNI %u does not exist\n", vni);
                return;
        }

        if (use_json)
                json = json_object_new_object();

        args[0] = vty;
        args[1] = json;
        zl3vni_print(zl3vni, (void *)args);

        if (use_json)
                vty_json(vty, json);
}

void zebra_vxlan_print_vrf_vni(struct vty *vty, struct zebra_vrf *zvrf,
                               json_object *json_vrfs)
{
        char buf[ETHER_ADDR_STRLEN];
        struct zebra_l3vni *zl3vni = NULL;

        zl3vni = zl3vni_lookup(zvrf->l3vni);
        if (!zl3vni)
                return;

        if (!json_vrfs) {
                vty_out(vty, "%-37s %-10u %-20s %-20s %-5s %-18s\n",
                        zvrf_name(zvrf), zl3vni->vni,
                        zl3vni_vxlan_if_name(zl3vni),
                        zl3vni_svi_if_name(zl3vni), zl3vni_state2str(zl3vni),
                        zl3vni_rmac2str(zl3vni, buf, sizeof(buf)));
        } else {
                json_object *json_vrf = NULL;

                json_vrf = json_object_new_object();
                json_object_string_add(json_vrf, "vrf", zvrf_name(zvrf));
                json_object_int_add(json_vrf, "vni", zl3vni->vni);
                json_object_string_add(json_vrf, "vxlanIntf",
                                       zl3vni_vxlan_if_name(zl3vni));
                json_object_string_add(json_vrf, "sviIntf",
                                       zl3vni_svi_if_name(zl3vni));
                json_object_string_add(json_vrf, "state",
                                       zl3vni_state2str(zl3vni));
                json_object_string_add(
                        json_vrf, "routerMac",
                        zl3vni_rmac2str(zl3vni, buf, sizeof(buf)));
                json_object_array_add(json_vrfs, json_vrf);
        }
}

/*
 * Display Neighbors for a VNI (VTY command handler).
 */
void zebra_vxlan_print_neigh_vni(struct vty *vty, struct zebra_vrf *zvrf,
                                 vni_t vni, bool use_json)
{
        struct zebra_evpn *zevpn;
        uint32_t num_neigh;
        struct neigh_walk_ctx wctx;
        json_object *json = NULL;

        if (!is_evpn_enabled())
                return;
        zevpn = zebra_evpn_lookup(vni);
        if (!zevpn) {
                if (use_json)
                        vty_out(vty, "{}\n");
                else
                        vty_out(vty, "%% VNI %u does not exist\n", vni);
                return;
        }
        num_neigh = hashcount(zevpn->neigh_table);
        if (!num_neigh)
                return;

        if (use_json)
                json = json_object_new_object();

        /* Since we have IPv6 addresses to deal with which can vary widely in
         * size, we try to be a bit more elegant in display by first computing
         * the maximum width.
         */
        memset(&wctx, 0, sizeof(wctx));
        wctx.zevpn = zevpn;
        wctx.vty = vty;
        wctx.addr_width = 15;
        wctx.json = json;
        hash_iterate(zevpn->neigh_table, zebra_evpn_find_neigh_addr_width,
                     &wctx);

        if (!use_json) {
                vty_out(vty,
                        "Number of ARPs (local and remote) known for this VNI: %u\n",
                        num_neigh);
                zebra_evpn_print_neigh_hdr(vty, &wctx);
        } else
                json_object_int_add(json, "numArpNd", num_neigh);

        hash_iterate(zevpn->neigh_table, zebra_evpn_print_neigh_hash, &wctx);
        if (use_json)
                vty_json(vty, json);
}

/*
 * Display neighbors across all VNIs (VTY command handler).
 */
void zebra_vxlan_print_neigh_all_vni(struct vty *vty, struct zebra_vrf *zvrf,
                                     bool print_dup, bool use_json)
{
        json_object *json = NULL;
        void *args[3];

        if (!is_evpn_enabled())
                return;

        if (use_json)
                json = json_object_new_object();

        args[0] = vty;
        args[1] = json;
        args[2] = (void *)(ptrdiff_t)print_dup;

        hash_iterate(zvrf->evpn_table,
                     (void (*)(struct hash_bucket *,
                               void *))zevpn_print_neigh_hash_all_evpn,
                     args);
        if (use_json)
                vty_json(vty, json);
}

/*
 * Display neighbors across all VNIs in detail(VTY command handler).
 */
void zebra_vxlan_print_neigh_all_vni_detail(struct vty *vty,
                                            struct zebra_vrf *zvrf,
                                            bool print_dup, bool use_json)
{
        json_object *json = NULL;
        void *args[3];

        if (!is_evpn_enabled())
                return;

        if (use_json)
                json = json_object_new_object();

        args[0] = vty;
        args[1] = json;
        args[2] = (void *)(ptrdiff_t)print_dup;

        hash_iterate(zvrf->evpn_table,
                     (void (*)(struct hash_bucket *,
                               void *))zevpn_print_neigh_hash_all_evpn_detail,
                     args);
        if (use_json)
                vty_json(vty, json);
}

/*
 * Display specific neighbor for a VNI, if present (VTY command handler).
 */
void zebra_vxlan_print_specific_neigh_vni(struct vty *vty,
                                          struct zebra_vrf *zvrf, vni_t vni,
                                          struct ipaddr *ip, bool use_json)
{
        struct zebra_evpn *zevpn;
        struct zebra_neigh *n;
        json_object *json = NULL;

        if (!is_evpn_enabled())
                return;
        zevpn = zebra_evpn_lookup(vni);
        if (!zevpn) {
                if (use_json)
                        vty_out(vty, "{}\n");
                else
                        vty_out(vty, "%% VNI %u does not exist\n", vni);
                return;
        }
        n = zebra_evpn_neigh_lookup(zevpn, ip);
        if (!n) {
                if (!use_json)
                        vty_out(vty,
                                "%% Requested neighbor does not exist in VNI %u\n",
                                vni);
                return;
        }
        if (use_json)
                json = json_object_new_object();

        zebra_evpn_print_neigh(n, vty, json);

        if (use_json)
                vty_json(vty, json);
}

/*
 * Display neighbors for a VNI from specific VTEP (VTY command handler).
 * By definition, these are remote neighbors.
 */
void zebra_vxlan_print_neigh_vni_vtep(struct vty *vty, struct zebra_vrf *zvrf,
                                      vni_t vni, struct in_addr vtep_ip,
                                      bool use_json)
{
        struct zebra_evpn *zevpn;
        uint32_t num_neigh;
        struct neigh_walk_ctx wctx;
        json_object *json = NULL;

        if (!is_evpn_enabled())
                return;
        zevpn = zebra_evpn_lookup(vni);
        if (!zevpn) {
                if (use_json)
                        vty_out(vty, "{}\n");
                else
                        vty_out(vty, "%% VNI %u does not exist\n", vni);
                return;
        }
        num_neigh = hashcount(zevpn->neigh_table);
        if (!num_neigh)
                return;

        if (use_json)
                json = json_object_new_object();

        memset(&wctx, 0, sizeof(wctx));
        wctx.zevpn = zevpn;
        wctx.vty = vty;
        wctx.addr_width = 15;
        wctx.flags = SHOW_REMOTE_NEIGH_FROM_VTEP;
        wctx.r_vtep_ip = vtep_ip;
        wctx.json = json;
        hash_iterate(zevpn->neigh_table, zebra_evpn_find_neigh_addr_width,
                     &wctx);
        hash_iterate(zevpn->neigh_table, zebra_evpn_print_neigh_hash, &wctx);

        if (use_json)
                vty_json(vty, json);
}

/*
 * Display Duplicate detected Neighbors for a VNI
 * (VTY command handler).
 */
void zebra_vxlan_print_neigh_vni_dad(struct vty *vty,
                                     struct zebra_vrf *zvrf,
                                     vni_t vni,
                                     bool use_json)
{
        struct zebra_evpn *zevpn;
        uint32_t num_neigh;
        struct neigh_walk_ctx wctx;
        json_object *json = NULL;

        if (!is_evpn_enabled())
                return;

        zevpn = zebra_evpn_lookup(vni);
        if (!zevpn) {
                vty_out(vty, "%% VNI %u does not exist\n", vni);
                return;
        }

        num_neigh = hashcount(zevpn->neigh_table);
        if (!num_neigh)
                return;

        num_neigh = num_dup_detected_neighs(zevpn);
        if (!num_neigh)
                return;

        if (use_json)
                json = json_object_new_object();

        /* Since we have IPv6 addresses to deal with which can vary widely in
         * size, we try to be a bit more elegant in display by first computing
         * the maximum width.
         */
        memset(&wctx, 0, sizeof(wctx));
        wctx.zevpn = zevpn;
        wctx.vty = vty;
        wctx.addr_width = 15;
        wctx.json = json;
        hash_iterate(zevpn->neigh_table, zebra_evpn_find_neigh_addr_width,
                     &wctx);

        if (!use_json) {
                vty_out(vty,
                        "Number of ARPs (local and remote) known for this VNI: %u\n",
                        num_neigh);
                vty_out(vty, "%*s %-6s %-8s %-17s %-30s\n",
                        -wctx.addr_width, "IP", "Type",
                        "State", "MAC", "Remote ES/VTEP");
        } else
                json_object_int_add(json, "numArpNd", num_neigh);

        hash_iterate(zevpn->neigh_table, zebra_evpn_print_dad_neigh_hash,
                     &wctx);

        if (use_json)
                vty_json(vty, json);
}

/*
 * Display MACs for a VNI (VTY command handler).
 */
void zebra_vxlan_print_macs_vni(struct vty *vty, struct zebra_vrf *zvrf,
                                vni_t vni, bool use_json, bool detail)
{
        struct zebra_evpn *zevpn;
        uint32_t num_macs;
        struct mac_walk_ctx wctx;
        json_object *json = NULL;
        json_object *json_mac = NULL;

        if (!is_evpn_enabled())
                return;
        zevpn = zebra_evpn_lookup(vni);
        if (!zevpn) {
                if (use_json)
                        vty_out(vty, "{}\n");
                else
                        vty_out(vty, "%% VNI %u does not exist\n", vni);
                return;
        }
        num_macs = num_valid_macs(zevpn);
        if (!num_macs)
                return;

        if (use_json) {
                json = json_object_new_object();
                json_mac = json_object_new_object();
        }

        memset(&wctx, 0, sizeof(wctx));
        wctx.zevpn = zevpn;
        wctx.vty = vty;
        wctx.json = json_mac;

        if (!use_json) {
                if (detail) {
                        vty_out(vty, "\nVNI %u #MACs (local and remote) %u\n\n",
                                zevpn->vni, num_macs);
                } else {
                        vty_out(vty,
                                "Number of MACs (local and remote) known for this VNI: %u\n",
                                num_macs);
                        vty_out(vty,
                                "Flags: N=sync-neighs, I=local-inactive, P=peer-active, X=peer-proxy\n");
                        vty_out(vty, "%-17s %-6s %-5s %-30s %-5s %s\n", "MAC",
                                "Type", "Flags", "Intf/Remote ES/VTEP", "VLAN",
                                "Seq #'s");
                }
        } else
                json_object_int_add(json, "numMacs", num_macs);

        if (detail)
                hash_iterate(zevpn->mac_table, zebra_evpn_print_mac_hash_detail,
                             &wctx);
        else
                hash_iterate(zevpn->mac_table, zebra_evpn_print_mac_hash,
                             &wctx);

        if (use_json) {
                json_object_object_add(json, "macs", json_mac);
                vty_json(vty, json);
        }
}

/*
 * Display MACs for all VNIs (VTY command handler).
 */
void zebra_vxlan_print_macs_all_vni(struct vty *vty, struct zebra_vrf *zvrf,
                                    bool print_dup, bool use_json)
{
        struct mac_walk_ctx wctx;
        json_object *json = NULL;

        if (!is_evpn_enabled()) {
                if (use_json)
                        vty_out(vty, "{}\n");
                return;
        }
        if (use_json)
                json = json_object_new_object();

        memset(&wctx, 0, sizeof(wctx));
        wctx.vty = vty;
        wctx.json = json;
        wctx.print_dup = print_dup;
        hash_iterate(zvrf->evpn_table, zevpn_print_mac_hash_all_evpn, &wctx);

        if (use_json)
                vty_json(vty, json);
}

/*
 * Display MACs in detail for all VNIs (VTY command handler).
 */
void zebra_vxlan_print_macs_all_vni_detail(struct vty *vty,
                                           struct zebra_vrf *zvrf,
                                           bool print_dup, bool use_json)
{
        struct mac_walk_ctx wctx;
        json_object *json = NULL;

        if (!is_evpn_enabled()) {
                if (use_json)
                        vty_out(vty, "{}\n");
                return;
        }
        if (use_json)
                json = json_object_new_object();

        memset(&wctx, 0, sizeof(wctx));
        wctx.vty = vty;
        wctx.json = json;
        wctx.print_dup = print_dup;
        hash_iterate(zvrf->evpn_table, zevpn_print_mac_hash_all_evpn_detail,
                     &wctx);

        if (use_json)
                vty_json(vty, json);
}

/*
 * Display MACs for all VNIs (VTY command handler).
 */
void zebra_vxlan_print_macs_all_vni_vtep(struct vty *vty,
                                         struct zebra_vrf *zvrf,
                                         struct in_addr vtep_ip, bool use_json)
{
        struct mac_walk_ctx wctx;
        json_object *json = NULL;

        if (!is_evpn_enabled())
                return;

        if (use_json)
                json = json_object_new_object();

        memset(&wctx, 0, sizeof(wctx));
        wctx.vty = vty;
        wctx.flags = SHOW_REMOTE_MAC_FROM_VTEP;
        wctx.r_vtep_ip = vtep_ip;
        wctx.json = json;
        hash_iterate(zvrf->evpn_table, zevpn_print_mac_hash_all_evpn, &wctx);

        if (use_json)
                vty_json(vty, json);
}

/*
 * Display specific MAC for a VNI, if present (VTY command handler).
 */
void zebra_vxlan_print_specific_mac_vni(struct vty *vty, struct zebra_vrf *zvrf,
                                        vni_t vni, struct ethaddr *macaddr,
                                        bool use_json)
{
        struct zebra_evpn *zevpn;
        struct zebra_mac *mac;
        json_object *json = NULL;

        if (!is_evpn_enabled())
                return;

        zevpn = zebra_evpn_lookup(vni);
        if (!zevpn) {
                if (use_json)
                        vty_out(vty, "{}\n");
                else
                        vty_out(vty, "%% VNI %u does not exist\n", vni);
                return;
        }
        mac = zebra_evpn_mac_lookup(zevpn, macaddr);
        if (!mac) {
                if (use_json)
                        vty_out(vty, "{}\n");
                else
                        vty_out(vty,
                                "%% Requested MAC does not exist in VNI %u\n",
                                vni);
                return;
        }

        if (use_json)
                json = json_object_new_object();

        zebra_evpn_print_mac(mac, vty, json);
        if (use_json)
                vty_json(vty, json);
}

/* Print Duplicate MACs per VNI */
void zebra_vxlan_print_macs_vni_dad(struct vty *vty,
                                    struct zebra_vrf *zvrf,
                                    vni_t vni, bool use_json)
{
        struct zebra_evpn *zevpn;
        struct mac_walk_ctx wctx;
        uint32_t num_macs;
        json_object *json = NULL;
        json_object *json_mac = NULL;

        if (!is_evpn_enabled())
                return;

        zevpn = zebra_evpn_lookup(vni);
        if (!zevpn) {
                vty_out(vty, "%% VNI %u does not exist\n", vni);
                return;
        }

        num_macs = num_valid_macs(zevpn);
        if (!num_macs)
                return;

        num_macs = num_dup_detected_macs(zevpn);
        if (!num_macs)
                return;

        if (use_json) {
                json = json_object_new_object();
                json_mac = json_object_new_object();
        }

        memset(&wctx, 0, sizeof(wctx));
        wctx.zevpn = zevpn;
        wctx.vty = vty;
        wctx.json = json_mac;

        if (!use_json) {
                vty_out(vty,
                "Number of MACs (local and remote) known for this VNI: %u\n",
                        num_macs);
                vty_out(vty, "%-17s %-6s %-5s %-30s %-5s\n", "MAC", "Type",
                        "Flags", "Intf/Remote ES/VTEP", "VLAN");
        } else
                json_object_int_add(json, "numMacs", num_macs);

        hash_iterate(zevpn->mac_table, zebra_evpn_print_dad_mac_hash, &wctx);

        if (use_json) {
                json_object_object_add(json, "macs", json_mac);
                vty_json(vty, json);
        }

}

int zebra_vxlan_clear_dup_detect_vni_mac(struct zebra_vrf *zvrf, vni_t vni,
                                         struct ethaddr *macaddr, char *errmsg,
                                         size_t errmsg_len)
{
        struct zebra_evpn *zevpn;
        struct zebra_mac *mac;
        struct listnode *node = NULL;
        struct zebra_neigh *nbr = NULL;

        if (!is_evpn_enabled())
                return 0;

        zevpn = zebra_evpn_lookup(vni);
        if (!zevpn) {
                snprintfrr(errmsg, errmsg_len, "VNI %u does not exist", vni);
                return -1;
        }

        mac = zebra_evpn_mac_lookup(zevpn, macaddr);
        if (!mac) {
                snprintf(errmsg, errmsg_len,
                         "Requested MAC does not exist in VNI %u\n", vni);
                return -1;
        }

        if (!CHECK_FLAG(mac->flags, ZEBRA_MAC_DUPLICATE)) {
                snprintfrr(errmsg, errmsg_len,
                           "Requested MAC is not duplicate detected\n");
                return -1;
        }

        /* Remove all IPs as duplicate associcated with this MAC */
        for (ALL_LIST_ELEMENTS_RO(mac->neigh_list, node, nbr)) {
                /* For local neigh mark inactive so MACIP update is generated
                 * to BGP. This is a scenario where MAC update received
                 * and detected as duplicate which marked neigh as duplicate.
                 * Later local neigh update did not get a chance to relay
                 * to BGP. Similarly remote macip update, neigh needs to be
                 * installed locally.
                 */
                if (zvrf->dad_freeze &&
                    CHECK_FLAG(nbr->flags, ZEBRA_NEIGH_DUPLICATE)) {
                        if (CHECK_FLAG(nbr->flags, ZEBRA_NEIGH_LOCAL))
                                ZEBRA_NEIGH_SET_INACTIVE(nbr);
                        else if (CHECK_FLAG(nbr->flags, ZEBRA_NEIGH_REMOTE))
                                zebra_evpn_rem_neigh_install(
                                        zevpn, nbr, false /*was_static*/);
                }

                UNSET_FLAG(nbr->flags, ZEBRA_NEIGH_DUPLICATE);
                nbr->dad_count = 0;
                nbr->detect_start_time.tv_sec = 0;
                nbr->dad_dup_detect_time = 0;
        }

        UNSET_FLAG(mac->flags, ZEBRA_MAC_DUPLICATE);
        mac->dad_count = 0;
        mac->detect_start_time.tv_sec = 0;
        mac->detect_start_time.tv_usec = 0;
        mac->dad_dup_detect_time = 0;
        THREAD_OFF(mac->dad_mac_auto_recovery_timer);

        /* warn-only action return */
        if (!zvrf->dad_freeze)
                return 0;

        /* Local: Notify Peer VTEPs, Remote: Install the entry */
        if (CHECK_FLAG(mac->flags, ZEBRA_MAC_LOCAL)) {
                /* Inform to BGP */
                if (zebra_evpn_mac_send_add_to_client(zevpn->vni, &mac->macaddr,
                                                      mac->flags, mac->loc_seq,
                                                      mac->es))
                        return 0;

                /* Process all neighbors associated with this MAC. */
                zebra_evpn_process_neigh_on_local_mac_change(zevpn, mac, 0,
                                                             0 /*es_change*/);

        } else if (CHECK_FLAG(mac->flags, ZEBRA_MAC_REMOTE)) {
                zebra_evpn_process_neigh_on_remote_mac_add(zevpn, mac);

                /* Install the entry. */
                zebra_evpn_rem_mac_install(zevpn, mac, false /* was_static */);
        }

        return 0;
}

int zebra_vxlan_clear_dup_detect_vni_ip(struct zebra_vrf *zvrf, vni_t vni,
                                        struct ipaddr *ip, char *errmsg,
                                        size_t errmsg_len)
{
        struct zebra_evpn *zevpn;
        struct zebra_neigh *nbr;
        struct zebra_mac *mac;
        char buf[INET6_ADDRSTRLEN];
        char buf2[ETHER_ADDR_STRLEN];

        if (!is_evpn_enabled())
                return 0;

        zevpn = zebra_evpn_lookup(vni);
        if (!zevpn) {
                snprintfrr(errmsg, errmsg_len, "VNI %u does not exist\n", vni);
                return -1;
        }

        nbr = zebra_evpn_neigh_lookup(zevpn, ip);
        if (!nbr) {
                snprintfrr(errmsg, errmsg_len,
                           "Requested host IP does not exist in VNI %u\n", vni);
                return -1;
        }

        ipaddr2str(&nbr->ip, buf, sizeof(buf));

        if (!CHECK_FLAG(nbr->flags, ZEBRA_NEIGH_DUPLICATE)) {
                snprintfrr(errmsg, errmsg_len,
                           "Requested host IP %s is not duplicate detected\n",
                           buf);
                return -1;
        }

        mac = zebra_evpn_mac_lookup(zevpn, &nbr->emac);

        if (CHECK_FLAG(mac->flags, ZEBRA_MAC_DUPLICATE)) {
                snprintfrr(
                        errmsg, errmsg_len,
                        "Requested IP's associated MAC %s is still in duplicate state\n",
                        prefix_mac2str(&nbr->emac, buf2, sizeof(buf2)));
                return -1;
        }

        if (IS_ZEBRA_DEBUG_VXLAN)
                zlog_debug("%s: clear neigh %s in dup state, flags 0x%x seq %u",
                           __func__, buf, nbr->flags, nbr->loc_seq);

        UNSET_FLAG(nbr->flags, ZEBRA_NEIGH_DUPLICATE);
        nbr->dad_count = 0;
        nbr->detect_start_time.tv_sec = 0;
        nbr->detect_start_time.tv_usec = 0;
        nbr->dad_dup_detect_time = 0;
        THREAD_OFF(nbr->dad_ip_auto_recovery_timer);

        if (!!CHECK_FLAG(nbr->flags, ZEBRA_NEIGH_LOCAL)) {
                zebra_evpn_neigh_send_add_to_client(zevpn->vni, ip, &nbr->emac,
                                                    nbr->mac, nbr->flags,
                                                    nbr->loc_seq);
        } else if (!!CHECK_FLAG(nbr->flags, ZEBRA_NEIGH_REMOTE)) {
                zebra_evpn_rem_neigh_install(zevpn, nbr, false /*was_static*/);
        }

        return 0;
}

static void zevpn_clear_dup_mac_hash(struct hash_bucket *bucket, void *ctxt)
{
        struct mac_walk_ctx *wctx = ctxt;
        struct zebra_mac *mac;
        struct zebra_evpn *zevpn;
        struct listnode *node = NULL;
        struct zebra_neigh *nbr = NULL;

        mac = (struct zebra_mac *)bucket->data;
        if (!mac)
                return;

        zevpn = wctx->zevpn;

        if (!CHECK_FLAG(mac->flags, ZEBRA_MAC_DUPLICATE))
                return;

        UNSET_FLAG(mac->flags, ZEBRA_MAC_DUPLICATE);
        mac->dad_count = 0;
        mac->detect_start_time.tv_sec = 0;
        mac->detect_start_time.tv_usec = 0;
        mac->dad_dup_detect_time = 0;
        THREAD_OFF(mac->dad_mac_auto_recovery_timer);

        /* Remove all IPs as duplicate associcated with this MAC */
        for (ALL_LIST_ELEMENTS_RO(mac->neigh_list, node, nbr)) {
                if (CHECK_FLAG(nbr->flags, ZEBRA_NEIGH_LOCAL)
                    && nbr->dad_count)
                        ZEBRA_NEIGH_SET_INACTIVE(nbr);

                UNSET_FLAG(nbr->flags, ZEBRA_NEIGH_DUPLICATE);
                nbr->dad_count = 0;
                nbr->detect_start_time.tv_sec = 0;
                nbr->dad_dup_detect_time = 0;
        }

        /* Local: Notify Peer VTEPs, Remote: Install the entry */
        if (CHECK_FLAG(mac->flags, ZEBRA_MAC_LOCAL)) {
                /* Inform to BGP */
                if (zebra_evpn_mac_send_add_to_client(zevpn->vni, &mac->macaddr,
                                                      mac->flags, mac->loc_seq,
                                                      mac->es))
                        return;

                /* Process all neighbors associated with this MAC. */
                zebra_evpn_process_neigh_on_local_mac_change(zevpn, mac, 0,
                                                             0 /*es_change*/);

        } else if (CHECK_FLAG(mac->flags, ZEBRA_MAC_REMOTE)) {
                zebra_evpn_process_neigh_on_remote_mac_add(zevpn, mac);

                /* Install the entry. */
                zebra_evpn_rem_mac_install(zevpn, mac, false /* was_static */);
        }
}

static void zevpn_clear_dup_detect_hash_vni_all(struct hash_bucket *bucket,
                                            void **args)
{
        struct zebra_evpn *zevpn;
        struct zebra_vrf *zvrf;
        struct mac_walk_ctx m_wctx;
        struct neigh_walk_ctx n_wctx;

        zevpn = (struct zebra_evpn *)bucket->data;
        if (!zevpn)
                return;

        zvrf = (struct zebra_vrf *)args[0];

        if (hashcount(zevpn->neigh_table)) {
                memset(&n_wctx, 0, sizeof(n_wctx));
                n_wctx.zevpn = zevpn;
                n_wctx.zvrf = zvrf;
                hash_iterate(zevpn->neigh_table,
                             zebra_evpn_clear_dup_neigh_hash, &n_wctx);
        }

        if (num_valid_macs(zevpn)) {
                memset(&m_wctx, 0, sizeof(m_wctx));
                m_wctx.zevpn = zevpn;
                m_wctx.zvrf = zvrf;
                hash_iterate(zevpn->mac_table, zevpn_clear_dup_mac_hash, &m_wctx);
        }

}

int zebra_vxlan_clear_dup_detect_vni_all(struct zebra_vrf *zvrf)
{
        void *args[1];

        if (!is_evpn_enabled())
                return 0;

        args[0] = zvrf;

        hash_iterate(zvrf->evpn_table,
                     (void (*)(struct hash_bucket *, void *))
                     zevpn_clear_dup_detect_hash_vni_all, args);

        return 0;
}

int zebra_vxlan_clear_dup_detect_vni(struct zebra_vrf *zvrf, vni_t vni)
{
        struct zebra_evpn *zevpn;
        struct mac_walk_ctx m_wctx;
        struct neigh_walk_ctx n_wctx;

        if (!is_evpn_enabled())
                return 0;

        zevpn = zebra_evpn_lookup(vni);
        if (!zevpn) {
                zlog_warn("VNI %u does not exist", vni);
                return CMD_WARNING;
        }

        if (hashcount(zevpn->neigh_table)) {
                memset(&n_wctx, 0, sizeof(n_wctx));
                n_wctx.zevpn = zevpn;
                n_wctx.zvrf = zvrf;
                hash_iterate(zevpn->neigh_table,
                             zebra_evpn_clear_dup_neigh_hash, &n_wctx);
        }

        if (num_valid_macs(zevpn)) {
                memset(&m_wctx, 0, sizeof(m_wctx));
                m_wctx.zevpn = zevpn;
                m_wctx.zvrf = zvrf;
                hash_iterate(zevpn->mac_table, zevpn_clear_dup_mac_hash, &m_wctx);
        }

        return 0;
}

/*
 * Display MACs for a VNI from specific VTEP (VTY command handler).
 */
void zebra_vxlan_print_macs_vni_vtep(struct vty *vty, struct zebra_vrf *zvrf,
                                     vni_t vni, struct in_addr vtep_ip,
                                     bool use_json)
{
        struct zebra_evpn *zevpn;
        uint32_t num_macs;
        struct mac_walk_ctx wctx;
        json_object *json = NULL;
        json_object *json_mac = NULL;

        if (!is_evpn_enabled())
                return;
        zevpn = zebra_evpn_lookup(vni);
        if (!zevpn) {
                if (use_json)
                        vty_out(vty, "{}\n");
                else
                        vty_out(vty, "%% VNI %u does not exist\n", vni);
                return;
        }
        num_macs = num_valid_macs(zevpn);
        if (!num_macs)
                return;

        if (use_json) {
                json = json_object_new_object();
                json_mac = json_object_new_object();
        }

        memset(&wctx, 0, sizeof(wctx));
        wctx.zevpn = zevpn;
        wctx.vty = vty;
        wctx.flags = SHOW_REMOTE_MAC_FROM_VTEP;
        wctx.r_vtep_ip = vtep_ip;
        wctx.json = json_mac;
        hash_iterate(zevpn->mac_table, zebra_evpn_print_mac_hash, &wctx);

        if (use_json) {
                json_object_int_add(json, "numMacs", wctx.count);
                if (wctx.count)
                        json_object_object_add(json, "macs", json_mac);
                vty_json(vty, json);
        }
}


/*
 * Display VNI information (VTY command handler).
 *
 * use_json flag indicates that output should be in JSON format.
 * json_array is non NULL when JSON output needs to be aggregated (by the
 * caller) and then printed, otherwise, JSON evpn vni info is printed
 * right away.
 */
void zebra_vxlan_print_vni(struct vty *vty, struct zebra_vrf *zvrf, vni_t vni,
                           bool use_json, json_object *json_array)
{
        json_object *json = NULL;
        void *args[2];
        struct zebra_l3vni *zl3vni = NULL;
        struct zebra_evpn *zevpn = NULL;

        if (!is_evpn_enabled())
                return;

        if (use_json)
                json = json_object_new_object();

        args[0] = vty;
        args[1] = json;

        zl3vni = zl3vni_lookup(vni);
        if (zl3vni) {
                zl3vni_print(zl3vni, (void *)args);
        } else {
                zevpn = zebra_evpn_lookup(vni);
                if (zevpn)
                        zebra_evpn_print(zevpn, (void *)args);
                else if (!json)
                        vty_out(vty, "%% VNI %u does not exist\n", vni);
        }

        if (use_json) {
                /*
                 * Each "json" object contains info about 1 VNI.
                 * When "json_array" is non-null, we aggreggate the json output
                 * into json_array and print it as a JSON array.
                 */
                if (json_array)
                        json_object_array_add(json_array, json);
                else
                        vty_json(vty, json);
        }
}

/* Display all global details for EVPN */
void zebra_vxlan_print_evpn(struct vty *vty, bool uj)
{
        int num_l2vnis = 0;
        int num_l3vnis = 0;
        int num_vnis = 0;
        json_object *json = NULL;
        struct zebra_vrf *zvrf = NULL;

        if (!is_evpn_enabled())
                return;

        zvrf = zebra_vrf_get_evpn();

        num_l3vnis = hashcount(zrouter.l3vni_table);
        num_l2vnis = hashcount(zvrf->evpn_table);
        num_vnis = num_l2vnis + num_l3vnis;

        if (uj) {
                json = json_object_new_object();
                json_object_string_add(json, "advertiseGatewayMacip",
                                       zvrf->advertise_gw_macip ? "Yes" : "No");
                json_object_string_add(json, "advertiseSviMacip",
                                       zvrf->advertise_svi_macip ? "Yes"
                                                                 : "No");
                json_object_string_add(json, "advertiseSviMac",
                                       zebra_evpn_mh_do_adv_svi_mac() ? "Yes"
                                                                      : "No");
                json_object_int_add(json, "numVnis", num_vnis);
                json_object_int_add(json, "numL2Vnis", num_l2vnis);
                json_object_int_add(json, "numL3Vnis", num_l3vnis);
                if (zebra_evpn_do_dup_addr_detect(zvrf))
                        json_object_boolean_true_add(json,
                                                "isDuplicateAddrDetection");
                else
                        json_object_boolean_false_add(json,
                                                "isDuplicateAddrDetection");
                json_object_int_add(json, "maxMoves", zvrf->dad_max_moves);
                json_object_int_add(json, "detectionTime", zvrf->dad_time);
                json_object_int_add(json, "detectionFreezeTime",
                                    zvrf->dad_freeze_time);
                zebra_evpn_mh_json(json);
        } else {
                vty_out(vty, "L2 VNIs: %u\n", num_l2vnis);
                vty_out(vty, "L3 VNIs: %u\n", num_l3vnis);
                vty_out(vty, "Advertise gateway mac-ip: %s\n",
                        zvrf->advertise_gw_macip ? "Yes" : "No");
                vty_out(vty, "Advertise svi mac-ip: %s\n",
                        zvrf->advertise_svi_macip ? "Yes" : "No");
                vty_out(vty, "Advertise svi mac: %s\n",
                        zebra_evpn_mh_do_adv_svi_mac() ? "Yes" : "No");
                vty_out(vty, "Duplicate address detection: %s\n",
                        zebra_evpn_do_dup_addr_detect(zvrf) ? "Enable"
                                                            : "Disable");
                vty_out(vty, "  Detection max-moves %u, time %d\n",
                        zvrf->dad_max_moves, zvrf->dad_time);
                if (zvrf->dad_freeze) {
                        if (zvrf->dad_freeze_time)
                                vty_out(vty, "  Detection freeze %u\n",
                                        zvrf->dad_freeze_time);
                        else
                                vty_out(vty, "  Detection freeze %s\n",
                                        "permanent");
                }
                zebra_evpn_mh_print(vty);
        }

        if (uj)
                vty_json(vty, json);
}

/*
 * Display VNI hash table (VTY command handler).
 */
void zebra_vxlan_print_vnis(struct vty *vty, struct zebra_vrf *zvrf,
                            bool use_json)
{
        json_object *json = NULL;
        void *args[2];

        if (!is_evpn_enabled())
                return;

        if (use_json)
                json = json_object_new_object();
        else
                vty_out(vty, "%-10s %-4s %-21s %-8s %-8s %-15s %-37s\n", "VNI",
                        "Type", "VxLAN IF", "# MACs", "# ARPs",
                        "# Remote VTEPs", "Tenant VRF");

        args[0] = vty;
        args[1] = json;

        /* Display all L2-VNIs */
        hash_iterate(
                zvrf->evpn_table,
                (void (*)(struct hash_bucket *, void *))zebra_evpn_print_hash,
                args);

        /* Display all L3-VNIs */
        hash_iterate(zrouter.l3vni_table,
                     (void (*)(struct hash_bucket *, void *))zl3vni_print_hash,
                     args);

        if (use_json)
                vty_json(vty, json);
}

void zebra_vxlan_dup_addr_detection(ZAPI_HANDLER_ARGS)
{
        struct stream *s;
        int time = 0;
        uint32_t max_moves = 0;
        uint32_t freeze_time = 0;
        bool dup_addr_detect = false;
        bool freeze = false;
        bool old_addr_detect;

        s = msg;
        STREAM_GETL(s, dup_addr_detect);
        STREAM_GETL(s, time);
        STREAM_GETL(s, max_moves);
        STREAM_GETL(s, freeze);
        STREAM_GETL(s, freeze_time);

        old_addr_detect = zebra_evpn_do_dup_addr_detect(zvrf);
        zvrf->dup_addr_detect = dup_addr_detect;
        dup_addr_detect = zebra_evpn_do_dup_addr_detect(zvrf);

        /* DAD previous state was enabled, and new state is disable,
         * clear all duplicate detected addresses.
         */
        if (old_addr_detect && !dup_addr_detect)
                zebra_vxlan_clear_dup_detect_vni_all(zvrf);

        zvrf->dad_time = time;
        zvrf->dad_max_moves = max_moves;
        zvrf->dad_freeze = freeze;
        zvrf->dad_freeze_time = freeze_time;

        if (IS_ZEBRA_DEBUG_VXLAN)
                zlog_debug(
                        "VRF %s duplicate detect %s max_moves %u timeout %u freeze %s freeze_time %u",
                        vrf_id_to_name(zvrf->vrf->vrf_id),
                        dup_addr_detect ? "enable" : "disable",
                        zvrf->dad_max_moves, zvrf->dad_time,
                        zvrf->dad_freeze ? "enable" : "disable",
                        zvrf->dad_freeze_time);

stream_failure:
        return;
}

/*
 * Display VNI hash table in detail(VTY command handler).
 */
void zebra_vxlan_print_vnis_detail(struct vty *vty, struct zebra_vrf *zvrf,
                                   bool use_json)
{
        json_object *json_array = NULL;
        struct zebra_ns *zns = NULL;
        struct zebra_evpn_show zes;

        if (!is_evpn_enabled())
                return;

        zns = zebra_ns_lookup(NS_DEFAULT);
        if (!zns)
                return;

        if (use_json)
                json_array = json_object_new_array();

        zes.vty = vty;
        zes.json = json_array;
        zes.zvrf = zvrf;
        zes.use_json = use_json;

        /* Display all L2-VNIs */
        hash_iterate(zvrf->evpn_table,
                     (void (*)(struct hash_bucket *,
                               void *))zebra_evpn_print_hash_detail,
                     &zes);

        /* Display all L3-VNIs */
        hash_iterate(zrouter.l3vni_table,
                     (void (*)(struct hash_bucket *,
                               void *))zl3vni_print_hash_detail,
                     &zes);

        if (use_json)
                vty_json(vty, json_array);
}

/*
 * Handle neighbor delete notification from the kernel (on a VLAN device
 * / L3 interface). This may result in either the neighbor getting deleted
 * from our database or being re-added to the kernel (if it is a valid
 * remote neighbor).
 */
int zebra_vxlan_handle_kernel_neigh_del(struct interface *ifp,
                                        struct interface *link_if,
                                        struct ipaddr *ip)
{
        struct zebra_evpn *zevpn = NULL;
        struct zebra_l3vni *zl3vni = NULL;

        /* check if this is a remote neigh entry corresponding to remote
         * next-hop
         */
        zl3vni = zl3vni_from_svi(ifp, link_if);
        if (zl3vni)
                return zl3vni_local_nh_del(zl3vni, ip);

        /* We are only interested in neighbors on an SVI that resides on top
         * of a VxLAN bridge.
         */
        zevpn = zebra_evpn_from_svi(ifp, link_if);
        if (!zevpn) {
                if (IS_ZEBRA_DEBUG_VXLAN)
                        zlog_debug(
                                "%s: Del neighbor %pIA EVPN is not present for interface %s",
                                __func__, ip, ifp->name);
                return 0;
        }

        if (!zevpn->vxlan_if) {
                zlog_debug(
                        "VNI %u hash %p doesn't have intf upon local neighbor DEL",
                        zevpn->vni, zevpn);
                return -1;
        }

        if (IS_ZEBRA_DEBUG_VXLAN)
                zlog_debug("Del neighbor %pIA intf %s(%u) -> L2-VNI %u",
                           ip, ifp->name, ifp->ifindex, zevpn->vni);

        return zebra_evpn_neigh_del_ip(zevpn, ip);
}

/*
 * Handle neighbor add or update notification from the kernel (on a VLAN
 * device / L3 interface). This is typically for a local neighbor but can
 * also be for a remote neighbor (e.g., ageout notification). It could
 * also be a "move" scenario.
 */
int zebra_vxlan_handle_kernel_neigh_update(struct interface *ifp,
                                           struct interface *link_if,
                                           struct ipaddr *ip,
                                           struct ethaddr *macaddr,
                                           uint16_t state,
                                           bool is_ext,
                                           bool is_router,
                                           bool local_inactive, bool dp_static)
{
        struct zebra_evpn *zevpn = NULL;
        struct zebra_l3vni *zl3vni = NULL;

        /* check if this is a remote neigh entry corresponding to remote
         * next-hop
         */
        zl3vni = zl3vni_from_svi(ifp, link_if);
        if (zl3vni)
                return zl3vni_local_nh_add_update(zl3vni, ip, state);

        /* We are only interested in neighbors on an SVI that resides on top
         * of a VxLAN bridge.
         */
        zevpn = zebra_evpn_from_svi(ifp, link_if);
        if (!zevpn)
                return 0;

        if (IS_ZEBRA_DEBUG_VXLAN || IS_ZEBRA_DEBUG_EVPN_MH_NEIGH)
                zlog_debug(
                        "Add/Update neighbor %pIA MAC %pEA intf %s(%u) state 0x%x %s%s%s%s-> L2-VNI %u",
                        ip, macaddr, ifp->name,
                        ifp->ifindex, state, is_ext ? "ext-learned " : "",
                        is_router ? "router " : "",
                        local_inactive ? "local_inactive " : "",
                        dp_static ? "peer_sync " : "", zevpn->vni);

        /* Is this about a local neighbor or a remote one? */
        if (!is_ext)
                return zebra_evpn_local_neigh_update(zevpn, ifp, ip, macaddr,
                                                     is_router, local_inactive,
                                                     dp_static);

        return zebra_evpn_remote_neigh_update(zevpn, ifp, ip, macaddr, state);
}

static int32_t
zebra_vxlan_remote_macip_helper(bool add, struct stream *s, vni_t *vni,
                                struct ethaddr *macaddr, uint16_t *ipa_len,
                                struct ipaddr *ip, struct in_addr *vtep_ip,
                                uint8_t *flags, uint32_t *seq, esi_t *esi)
{
        uint16_t l = 0;

        /*
         * Obtain each remote MACIP and process.
         * Message contains VNI, followed by MAC followed by IP (if any)
         * followed by remote VTEP IP.
         */
        memset(ip, 0, sizeof(*ip));
        STREAM_GETL(s, *vni);
        STREAM_GET(macaddr->octet, s, ETH_ALEN);
        STREAM_GETW(s, *ipa_len);

        if (*ipa_len) {
                if (*ipa_len == IPV4_MAX_BYTELEN)
                        ip->ipa_type = IPADDR_V4;
                else if (*ipa_len == IPV6_MAX_BYTELEN)
                        ip->ipa_type = IPADDR_V6;
                else {
                        if (IS_ZEBRA_DEBUG_VXLAN)
                                zlog_debug(
                                        "ipa_len *must* be %d or %d bytes in length not %d",
                                        IPV4_MAX_BYTELEN, IPV6_MAX_BYTELEN,
                                        *ipa_len);
                        goto stream_failure;
                }

                STREAM_GET(&ip->ip.addr, s, *ipa_len);
        }
        l += 4 + ETH_ALEN + 4 + *ipa_len;
        STREAM_GET(&vtep_ip->s_addr, s, IPV4_MAX_BYTELEN);
        l += IPV4_MAX_BYTELEN;

        if (add) {
                STREAM_GETC(s, *flags);
                STREAM_GETL(s, *seq);
                l += 5;
                STREAM_GET(esi, s, sizeof(esi_t));
                l += sizeof(esi_t);
        }

        return l;

stream_failure:
        return -1;
}

/*
 * Handle message from client to delete a remote MACIP for a VNI.
 */
void zebra_vxlan_remote_macip_del(ZAPI_HANDLER_ARGS)
{
        struct stream *s;
        vni_t vni;
        struct ethaddr macaddr;
        struct ipaddr ip;
        struct in_addr vtep_ip;
        uint16_t l = 0, ipa_len;
        char buf1[INET6_ADDRSTRLEN];

        s = msg;

        while (l < hdr->length) {
                int res_length = zebra_vxlan_remote_macip_helper(
                        false, s, &vni, &macaddr, &ipa_len, &ip, &vtep_ip, NULL,
                        NULL, NULL);

                if (res_length == -1)
                        goto stream_failure;

                l += res_length;
                if (IS_ZEBRA_DEBUG_VXLAN)
                        zlog_debug(
                                "Recv MACIP DEL VNI %u MAC %pEA%s%s Remote VTEP %pI4 from %s",
                                vni, &macaddr,
                                ipa_len ? " IP " : "",
                                ipa_len ?
                                ipaddr2str(&ip, buf1, sizeof(buf1)) : "",
                                &vtep_ip, zebra_route_string(client->proto));

                /* Enqueue to workqueue for processing */
                zebra_rib_queue_evpn_rem_macip_del(vni, &macaddr, &ip, vtep_ip);
        }

stream_failure:
        return;
}

/*
 * Handle message from client to add a remote MACIP for a VNI. This
 * could be just the add of a MAC address or the add of a neighbor
 * (IP+MAC).
 */
void zebra_vxlan_remote_macip_add(ZAPI_HANDLER_ARGS)
{
        struct stream *s;
        vni_t vni;
        struct ethaddr macaddr;
        struct ipaddr ip;
        struct in_addr vtep_ip;
        uint16_t l = 0, ipa_len;
        uint8_t flags = 0;
        uint32_t seq;
        char buf1[INET6_ADDRSTRLEN];
        esi_t esi;
        char esi_buf[ESI_STR_LEN];

        if (!EVPN_ENABLED(zvrf)) {
                zlog_debug("EVPN not enabled, ignoring remote MACIP ADD");
                return;
        }

        s = msg;

        while (l < hdr->length) {

                int res_length = zebra_vxlan_remote_macip_helper(
                        true, s, &vni, &macaddr, &ipa_len, &ip, &vtep_ip,
                        &flags, &seq, &esi);

                if (res_length == -1)
                        goto stream_failure;

                l += res_length;
                if (IS_ZEBRA_DEBUG_VXLAN) {
                        if (memcmp(&esi, zero_esi, sizeof(esi_t)))
                                esi_to_str(&esi, esi_buf, sizeof(esi_buf));
                        else
                                strlcpy(esi_buf, "-", ESI_STR_LEN);
                        zlog_debug(
                                "Recv %sMACIP ADD VNI %u MAC %pEA%s%s flags 0x%x seq %u VTEP %pI4 ESI %s from %s",
                                (flags & ZEBRA_MACIP_TYPE_SYNC_PATH) ?
                                "sync-" : "",
                                vni, &macaddr,
                                ipa_len ? " IP " : "",
                                ipa_len ?
                                ipaddr2str(&ip, buf1, sizeof(buf1)) : "",
                                flags, seq, &vtep_ip, esi_buf,
                                zebra_route_string(client->proto));
                }

                /* Enqueue to workqueue for processing */
                zebra_rib_queue_evpn_rem_macip_add(vni, &macaddr, &ip, flags,
                                                   seq, vtep_ip, &esi);
        }

stream_failure:
        return;
}

/*
 * Handle remote vtep delete by kernel; re-add the vtep if we have it
 */
int zebra_vxlan_check_readd_vtep(struct interface *ifp, vni_t vni,
                                 struct in_addr vtep_ip)
{
        struct zebra_if *zif;
        struct zebra_vrf *zvrf = NULL;
        struct zebra_evpn *zevpn = NULL;
        struct zebra_vtep *zvtep = NULL;
        struct zebra_vxlan_vni *vnip;

        zif = ifp->info;
        assert(zif);

        /* If EVPN is not enabled, nothing to do. */
        if (!is_evpn_enabled())
                return 0;

        /* Locate VRF corresponding to interface. */
        zvrf = ifp->vrf->info;
        if (!zvrf)
                return -1;

        vnip = zebra_vxlan_if_vni_find(zif, vni);
        if (!vnip)
                return 0;

        /* Locate hash entry; it is expected to exist. */
        zevpn = zebra_evpn_lookup(vni);
        if (!zevpn)
                return 0;

        /* If the remote vtep entry doesn't exists nothing to do */
        zvtep = zebra_evpn_vtep_find(zevpn, &vtep_ip);
        if (!zvtep)
                return 0;

        if (IS_ZEBRA_DEBUG_VXLAN)
                zlog_debug(
                        "Del MAC for remote VTEP %pI4 intf %s(%u) VNI %u - readd",
                        &vtep_ip, ifp->name, ifp->ifindex, vni);

        zebra_evpn_vtep_install(zevpn, zvtep);
        return 0;
}

/*
 * Handle notification of MAC add/update over VxLAN. If the kernel is notifying
 * us, this must involve a multihoming scenario. Treat this as implicit delete
 * of any prior local MAC.
 */
static int zebra_vxlan_check_del_local_mac(struct interface *ifp,
                                           struct interface *br_if,
                                           struct ethaddr *macaddr,
                                           vlanid_t vid, vni_t vni)
{
        struct zebra_if *zif;
        struct zebra_evpn *zevpn;
        struct zebra_mac *mac;

        zif = ifp->info;
        assert(zif);

        /* Check if EVPN is enabled. */
        if (!is_evpn_enabled())
                return 0;

        /* Locate hash entry; it is expected to exist. */
        zevpn = zebra_evpn_lookup(vni);
        if (!zevpn)
                return 0;

        /* If entry doesn't exist, nothing to do. */
        mac = zebra_evpn_mac_lookup(zevpn, macaddr);
        if (!mac)
                return 0;

        /* Is it a local entry? */
        if (!CHECK_FLAG(mac->flags, ZEBRA_MAC_LOCAL))
                return 0;

        if (IS_ZEBRA_DEBUG_VXLAN)
                zlog_debug(
                        "Add/update remote MAC %pEA intf %s(%u) VNI %u flags 0x%x - del local",
                        macaddr, ifp->name, ifp->ifindex, vni, mac->flags);

        /* Remove MAC from BGP. */
        zebra_evpn_mac_send_del_to_client(zevpn->vni, macaddr, mac->flags,
                                          false /* force */);

        /*
         * If there are no neigh associated with the mac delete the mac
         * else mark it as AUTO for forward reference
         */
        if (!listcount(mac->neigh_list)) {
                zebra_evpn_mac_del(zevpn, mac);
        } else {
                zebra_evpn_mac_clear_fwd_info(mac);
                UNSET_FLAG(mac->flags, ZEBRA_MAC_ALL_LOCAL_FLAGS);
                UNSET_FLAG(mac->flags, ZEBRA_MAC_STICKY);
                SET_FLAG(mac->flags, ZEBRA_MAC_AUTO);
        }

        return 0;
}

/* MAC notification from the dataplane with a network dest port -
 * 1. This can be a local MAC on a down ES (if fast-failover is not possible
 * 2. Or it can be a remote MAC
 */
int zebra_vxlan_dp_network_mac_add(struct interface *ifp,
                                   struct interface *br_if,
                                   struct ethaddr *macaddr, vlanid_t vid,
                                   vni_t vni, uint32_t nhg_id, bool sticky,
                                   bool dp_static)
{
        struct zebra_evpn_es *es;
        struct interface *acc_ifp;

        /* If netlink message is with vid, it will have no nexthop.
         * So skip it.
         */
        if (vid) {
                if (IS_ZEBRA_DEBUG_VXLAN || IS_ZEBRA_DEBUG_EVPN_MH_MAC)
                        zlog_debug("dpAdd MAC %pEA VID %u - ignore as no nhid",
                                   macaddr, vid);
                return 0;
        }

        /* Get vxlan's vid for netlink message has no it. */
        vid = ((struct zebra_if *)ifp->info)->l2info.vxl.access_vlan;

        /* if remote mac delete the local entry */
        if (!nhg_id || !zebra_evpn_nhg_is_local_es(nhg_id, &es)
            || !zebra_evpn_es_local_mac_via_network_port(es)) {
                if (IS_ZEBRA_DEBUG_VXLAN || IS_ZEBRA_DEBUG_EVPN_MH_MAC)
                        zlog_debug("dpAdd remote MAC %pEA VID %u", macaddr,
                                   vid);
                return zebra_vxlan_check_del_local_mac(ifp, br_if, macaddr, vid,
                                                       vni);
        }

        /* If local MAC on a down local ES translate the network-mac-add
         * to a local-active-mac-add
         */
        if (IS_ZEBRA_DEBUG_VXLAN || IS_ZEBRA_DEBUG_EVPN_MH_MAC)
                zlog_debug("dpAdd local-nw-MAC %pEA VID %u", macaddr, vid);
        acc_ifp = es->zif->ifp;
        return zebra_vxlan_local_mac_add_update(
                acc_ifp, br_if, macaddr, vid, sticky,
                false /* local_inactive */, dp_static);
}

/*
 * Handle network MAC delete by kernel -
 * 1. readd the remote MAC if we have it
 * 2. local MAC with does ES may also need to be re-installed
 */
int zebra_vxlan_dp_network_mac_del(struct interface *ifp,
                                   struct interface *br_if,
                                   struct ethaddr *macaddr, vlanid_t vid,
                                   vni_t vni)
{
        struct zebra_if *zif = NULL;
        struct zebra_evpn *zevpn = NULL;
        struct zebra_l3vni *zl3vni = NULL;
        struct zebra_mac *mac = NULL;

        zif = ifp->info;
        assert(zif);

        /* Check if EVPN is enabled. */
        if (!is_evpn_enabled())
                return 0;

        /* check if this is a remote RMAC and readd simillar to remote macs */
        zl3vni = zl3vni_lookup(vni);
        if (zl3vni)
                return zebra_vxlan_readd_remote_rmac(zl3vni, macaddr);

        /* Locate hash entry; it is expected to exist. */
        zevpn = zebra_evpn_lookup(vni);
        if (!zevpn)
                return 0;

        /* If entry doesn't exist, nothing to do. */
        mac = zebra_evpn_mac_lookup(zevpn, macaddr);
        if (!mac)
                return 0;

        if (CHECK_FLAG(mac->flags, ZEBRA_MAC_REMOTE)) {
                /* If remote entry simply re-install */
                if (IS_ZEBRA_DEBUG_VXLAN || IS_ZEBRA_DEBUG_EVPN_MH_MAC)
                        zlog_debug(
                                "dpDel remote MAC %pEA intf %s(%u) VNI %u - readd",
                                macaddr, ifp->name, ifp->ifindex, vni);
                zebra_evpn_rem_mac_install(zevpn, mac, false /* was_static */);
        } else if (CHECK_FLAG(mac->flags, ZEBRA_MAC_LOCAL) && mac->es
                   && zebra_evpn_es_local_mac_via_network_port(mac->es)) {
                /* If local entry via nw-port call local-del which will
                 * re-install entry in the dataplane is needed
                 */
                if (IS_ZEBRA_DEBUG_VXLAN || IS_ZEBRA_DEBUG_EVPN_MH_MAC)
                        zlog_debug("dpDel local-nw-MAC %pEA VNI %u", macaddr,
                                   vni);

                zebra_evpn_del_local_mac(zevpn, mac, false);
        }

        return 0;
}

/*
 * Handle local MAC delete (on a port or VLAN corresponding to this VNI).
 */
int zebra_vxlan_local_mac_del(struct interface *ifp, struct interface *br_if,
                              struct ethaddr *macaddr, vlanid_t vid)
{
        struct zebra_evpn *zevpn;
        struct zebra_mac *mac;

        /* We are interested in MACs only on ports or (port, VLAN) that
         * map to a VNI.
         */
        zevpn = zebra_evpn_map_vlan(ifp, br_if, vid);
        if (!zevpn)
                return 0;
        if (!zevpn->vxlan_if) {
                zlog_debug(
                        "VNI %u hash %p doesn't have intf upon local MAC DEL",
                        zevpn->vni, zevpn);
                return -1;
        }

        /* If entry doesn't exist, nothing to do. */
        mac = zebra_evpn_mac_lookup(zevpn, macaddr);
        if (!mac)
                return 0;

        /* Is it a local entry? */
        if (!CHECK_FLAG(mac->flags, ZEBRA_MAC_LOCAL))
                return 0;

        return zebra_evpn_del_local_mac(zevpn, mac, false);
}

/*
 * Handle local MAC add (on a port or VLAN corresponding to this VNI).
 */
int zebra_vxlan_local_mac_add_update(struct interface *ifp,
                                     struct interface *br_if,
                                     struct ethaddr *macaddr, vlanid_t vid,
                                         bool sticky, bool local_inactive,
                                         bool dp_static)
{
        struct zebra_evpn *zevpn;
        struct zebra_vrf *zvrf;

        assert(ifp);

        /* We are interested in MACs only on ports or (port, VLAN) that
         * map to an EVPN.
         */
        zevpn = zebra_evpn_map_vlan(ifp, br_if, vid);
        if (!zevpn) {
                if (IS_ZEBRA_DEBUG_VXLAN)
                        zlog_debug(
                                "        Add/Update %sMAC %pEA intf %s(%u) VID %u, could not find EVPN",
                                sticky ? "sticky " : "", macaddr,
                                ifp->name, ifp->ifindex, vid);
                return 0;
        }

        if (!zevpn->vxlan_if) {
                if (IS_ZEBRA_DEBUG_VXLAN)
                        zlog_debug(
                                "        VNI %u hash %p doesn't have intf upon local MAC ADD",
                                zevpn->vni, zevpn);
                return -1;
        }

        zvrf = zebra_vrf_get_evpn();
        return zebra_evpn_add_update_local_mac(zvrf, zevpn, ifp, macaddr, vid,
                                               sticky, local_inactive,
                                               dp_static, NULL);
}

/*
 * Handle message from client to delete a remote VTEP for an EVPN.
 */
void zebra_vxlan_remote_vtep_del_zapi(ZAPI_HANDLER_ARGS)
{
        struct stream *s;
        unsigned short l = 0;
        vni_t vni;
        struct in_addr vtep_ip;

        if (!is_evpn_enabled()) {
                zlog_debug(
                        "%s: EVPN is not enabled yet we have received a VTEP DEL msg",
                        __func__);
                return;
        }

        if (!EVPN_ENABLED(zvrf)) {
                zlog_debug("Recv VTEP DEL zapi for non-EVPN VRF %u",
                           zvrf_id(zvrf));
                return;
        }

        s = msg;

        while (l < hdr->length) {
                int flood_control __attribute__((unused));

                /* Obtain each remote VTEP and process. */
                STREAM_GETL(s, vni);
                l += 4;
                STREAM_GET(&vtep_ip.s_addr, s, IPV4_MAX_BYTELEN);
                l += IPV4_MAX_BYTELEN;

                /* Flood control is intentionally ignored right now */
                STREAM_GETL(s, flood_control);
                l += 4;

                if (IS_ZEBRA_DEBUG_VXLAN)
                        zlog_debug("Recv VTEP DEL %pI4 VNI %u from %s",
                                   &vtep_ip, vni,
                                   zebra_route_string(client->proto));

                /* Enqueue for processing */
                zebra_rib_queue_evpn_rem_vtep_del(zvrf_id(zvrf), vni, vtep_ip);
        }

stream_failure:
        return;
}

/*
 * Handle message from client to delete a remote VTEP for an EVPN.
 */
void zebra_vxlan_remote_vtep_del(vrf_id_t vrf_id, vni_t vni,
                                 struct in_addr vtep_ip)
{
        struct zebra_evpn *zevpn;
        struct zebra_vtep *zvtep;
        struct interface *ifp;
        struct zebra_if *zif;
        struct zebra_vrf *zvrf;

        if (!is_evpn_enabled()) {
                zlog_debug("%s: Can't process vtep del: EVPN is not enabled",
                           __func__);
                return;
        }

        zvrf = zebra_vrf_lookup_by_id(vrf_id);
        if (!zvrf)
                return;

        if (!EVPN_ENABLED(zvrf)) {
                zlog_debug("Can't process VTEP DEL for non-EVPN VRF %u",
                           zvrf_id(zvrf));
                return;
        }

        /* Locate VNI hash entry - expected to exist. */
        zevpn = zebra_evpn_lookup(vni);
        if (!zevpn) {
                if (IS_ZEBRA_DEBUG_VXLAN)
                        zlog_debug(
                                "Failed to locate VNI hash for remote VTEP DEL, VNI %u",
                                vni);
                return;
        }

        ifp = zevpn->vxlan_if;
        if (!ifp) {
                zlog_debug(
                        "VNI %u hash %p doesn't have intf upon remote VTEP DEL",
                        zevpn->vni, zevpn);
                return;
        }
        zif = ifp->info;

        /* If down or not mapped to a bridge, we're done. */
        if (!if_is_operative(ifp) || !zif->brslave_info.br_if)
                return;

        /* If the remote VTEP does not exist, there's nothing more to
         * do.
         * Otherwise, uninstall any remote MACs pointing to this VTEP
         * and then, the VTEP entry itself and remove it.
         */
        zvtep = zebra_evpn_vtep_find(zevpn, &vtep_ip);
        if (!zvtep)
                return;

        zebra_evpn_vtep_uninstall(zevpn, &vtep_ip);
        zebra_evpn_vtep_del(zevpn, zvtep);
}

/*
 * Handle message from client to add a remote VTEP for an EVPN.
 */
void zebra_vxlan_remote_vtep_add(vrf_id_t vrf_id, vni_t vni,
                                 struct in_addr vtep_ip, int flood_control)
{
        struct zebra_evpn *zevpn;
        struct interface *ifp;
        struct zebra_if *zif;
        struct zebra_vtep *zvtep;
        struct zebra_vrf *zvrf;

        if (!is_evpn_enabled()) {
                zlog_debug("%s: EVPN not enabled: can't process a VTEP ADD",
                           __func__);
                return;
        }

        zvrf = zebra_vrf_lookup_by_id(vrf_id);
        if (!zvrf)
                return;

        if (!EVPN_ENABLED(zvrf)) {
                zlog_debug("Can't process VTEP ADD for non-EVPN VRF %u",
                           zvrf_id(zvrf));
                return;
        }

        /* Locate VNI hash entry - expected to exist. */
        zevpn = zebra_evpn_lookup(vni);
        if (!zevpn) {
                flog_err(
                        EC_ZEBRA_VTEP_ADD_FAILED,
                        "Failed to locate EVPN hash upon remote VTEP ADD, VNI %u",
                        vni);
                return;
        }

        ifp = zevpn->vxlan_if;
        if (!ifp) {
                flog_err(
                        EC_ZEBRA_VTEP_ADD_FAILED,
                        "VNI %u hash %p doesn't have intf upon remote VTEP ADD",
                        zevpn->vni, zevpn);
                return;
        }

        zif = ifp->info;

        /* If down or not mapped to a bridge, we're done. */
        if (!if_is_operative(ifp) || !zif->brslave_info.br_if)
                return;

        zvtep = zebra_evpn_vtep_find(zevpn, &vtep_ip);
        if (zvtep) {
                /* If the remote VTEP already exists check if
                 * the flood mode has changed
                 */
                if (zvtep->flood_control != flood_control) {
                        if (zvtep->flood_control == VXLAN_FLOOD_DISABLED)
                                /* old mode was head-end-replication but
                                 * is no longer; get rid of the HER fdb
                                 * entry installed before
                                 */
                                zebra_evpn_vtep_uninstall(zevpn, &vtep_ip);
                        zvtep->flood_control = flood_control;
                        zebra_evpn_vtep_install(zevpn, zvtep);
                }
        } else {
                zvtep = zebra_evpn_vtep_add(zevpn, &vtep_ip, flood_control);
                if (zvtep)
                        zebra_evpn_vtep_install(zevpn, zvtep);
                else
                        flog_err(EC_ZEBRA_VTEP_ADD_FAILED,
                                 "Failed to add remote VTEP, VNI %u zevpn %p",
                                 vni, zevpn);
        }
}

/*
 * Handle message from client to add a remote VTEP for an EVPN.
 */
void zebra_vxlan_remote_vtep_add_zapi(ZAPI_HANDLER_ARGS)
{
        struct stream *s;
        unsigned short l = 0;
        vni_t vni;
        struct in_addr vtep_ip;
        int flood_control;

        if (!is_evpn_enabled()) {
                zlog_debug(
                        "%s: EVPN not enabled yet we received a VTEP ADD zapi msg",
                        __func__);
                return;
        }

        if (!EVPN_ENABLED(zvrf)) {
                zlog_debug("Recv VTEP ADD zapi for non-EVPN VRF %u",
                           zvrf_id(zvrf));
                return;
        }

        s = msg;

        while (l < hdr->length) {
                /* Obtain each remote VTEP and process. */
                STREAM_GETL(s, vni);
                l += 4;
                STREAM_GET(&vtep_ip.s_addr, s, IPV4_MAX_BYTELEN);
                STREAM_GETL(s, flood_control);
                l += IPV4_MAX_BYTELEN + 4;

                if (IS_ZEBRA_DEBUG_VXLAN)
                        zlog_debug("Recv VTEP ADD %pI4 VNI %u flood %d from %s",
                                   &vtep_ip, vni, flood_control,
                                   zebra_route_string(client->proto));

                /* Enqueue for processing */
                zebra_rib_queue_evpn_rem_vtep_add(zvrf_id(zvrf), vni, vtep_ip,
                                                  flood_control);
        }

stream_failure:
        return;
}

/*
 * Add/Del gateway macip to evpn
 * g/w can be:
 *  1. SVI interface on a vlan aware bridge
 *  2. SVI interface on a vlan unaware bridge
 *  3. vrr interface (MACVLAN) associated to a SVI
 * We advertise macip routes for an interface if it is associated to VxLan vlan
 */
int zebra_vxlan_add_del_gw_macip(struct interface *ifp, const struct prefix *p,
                                 int add)
{
        struct ipaddr ip;
        struct ethaddr macaddr;
        struct zebra_evpn *zevpn = NULL;

        memset(&ip, 0, sizeof(ip));
        memset(&macaddr, 0, sizeof(macaddr));

        /* Check if EVPN is enabled. */
        if (!is_evpn_enabled())
                return 0;

        if (IS_ZEBRA_IF_MACVLAN(ifp)) {
                struct interface *svi_if =
                        NULL; /* SVI corresponding to the MACVLAN */
                struct zebra_if *ifp_zif =
                        NULL; /* Zebra daemon specific info for MACVLAN */
                struct zebra_if *svi_if_zif =
                        NULL; /* Zebra daemon specific info for SVI*/

                ifp_zif = ifp->info;
                if (!ifp_zif)
                        return -1;

                /*
                 * for a MACVLAN interface the link represents the svi_if
                 */
                svi_if = if_lookup_by_index_per_ns(zebra_ns_lookup(NS_DEFAULT),
                                                   ifp_zif->link_ifindex);
                if (!svi_if) {
                        zlog_debug("MACVLAN %s(%u) without link information",
                                   ifp->name, ifp->ifindex);
                        return -1;
                }

                if (IS_ZEBRA_IF_VLAN(svi_if)) {
                        /*
                         * If it is a vlan aware bridge then the link gives the
                         * bridge information
                         */
                        struct interface *svi_if_link = NULL;

                        svi_if_zif = svi_if->info;
                        if (svi_if_zif) {
                                svi_if_link = if_lookup_by_index_per_ns(
                                        zebra_ns_lookup(NS_DEFAULT),
                                        svi_if_zif->link_ifindex);
                                zevpn = zebra_evpn_from_svi(svi_if,
                                                            svi_if_link);
                        }
                } else if (IS_ZEBRA_IF_BRIDGE(svi_if)) {
                        /*
                         * If it is a vlan unaware bridge then svi is the bridge
                         * itself
                         */
                        zevpn = zebra_evpn_from_svi(svi_if, svi_if);
                }
        } else if (IS_ZEBRA_IF_VLAN(ifp)) {
                struct zebra_if *svi_if_zif =
                        NULL; /* Zebra daemon specific info for SVI */
                struct interface *svi_if_link =
                        NULL; /* link info for the SVI = bridge info */

                svi_if_zif = ifp->info;
                if (svi_if_zif) {
                        svi_if_link = if_lookup_by_index_per_ns(
                                zebra_ns_lookup(NS_DEFAULT),
                                svi_if_zif->link_ifindex);
                        if (svi_if_link)
                                zevpn = zebra_evpn_from_svi(ifp, svi_if_link);
                }
        } else if (IS_ZEBRA_IF_BRIDGE(ifp)) {
                zevpn = zebra_evpn_from_svi(ifp, ifp);
        }

        if (!zevpn)
                return 0;

        if (!zevpn->vxlan_if) {
                zlog_debug("VNI %u hash %p doesn't have intf upon MACVLAN up",
                           zevpn->vni, zevpn);
                return -1;
        }

        /* VRR IP is advertised only if gw-macip-adv-enabled */
        if (IS_ZEBRA_IF_MACVLAN(ifp)) {
                if (!advertise_gw_macip_enabled(zevpn))
                        return 0;
        } else {
                /* SVI IP is advertised if gw or svi macip-adv-enabled */
                if (!advertise_svi_macip_enabled(zevpn)
                    && !advertise_gw_macip_enabled(zevpn))
                        return 0;
        }

        memcpy(&macaddr.octet, ifp->hw_addr, ETH_ALEN);

        if (p->family == AF_INET) {
                ip.ipa_type = IPADDR_V4;
                memcpy(&(ip.ipaddr_v4), &(p->u.prefix4),
                       sizeof(struct in_addr));
        } else if (p->family == AF_INET6) {
                ip.ipa_type = IPADDR_V6;
                memcpy(&(ip.ipaddr_v6), &(p->u.prefix6),
                       sizeof(struct in6_addr));
        }


        if (add)
                zebra_evpn_gw_macip_add(ifp, zevpn, &macaddr, &ip);
        else
                zebra_evpn_gw_macip_del(ifp, zevpn, &ip);

        return 0;
}

/*
 * Handle SVI interface going down.
 * SVI can be associated to either L3-VNI or L2-VNI.
 * For L2-VNI: At this point, this is a NOP since
 *      the kernel deletes the neighbor entries on this SVI (if any).
 *      We only need to update the vrf corresponding to zevpn.
 * For L3-VNI: L3-VNI is operationally down, update mac-ip routes and delete
 *      from bgp
 */
int zebra_vxlan_svi_down(struct interface *ifp, struct interface *link_if)
{
        struct zebra_l3vni *zl3vni = NULL;

        zl3vni = zl3vni_from_svi(ifp, link_if);
        if (zl3vni) {

                /* process l3-vni down */
                zebra_vxlan_process_l3vni_oper_down(zl3vni);

                /* remove association with svi-if */
                zl3vni->svi_if = NULL;
        } else {
                struct zebra_evpn *zevpn = NULL;

                /* Unlink the SVI from the access VLAN */
                zebra_evpn_acc_bd_svi_set(ifp->info, link_if->info, false);

                /* since we dont have svi corresponding to zevpn, we associate it
                 * to default vrf. Note: the corresponding neigh entries on the
                 * SVI would have already been deleted */
                zevpn = zebra_evpn_from_svi(ifp, link_if);

                if (zevpn) {
                        /* remove from l3-vni list */
                        zl3vni = zl3vni_from_vrf(zevpn->vrf_id);
                        if (zl3vni)
                                listnode_delete(zl3vni->l2vnis, zevpn);

                        zevpn->svi_if = NULL;
                        zevpn->vrf_id = VRF_DEFAULT;

                        /* update the tenant vrf in BGP */
                        if (if_is_operative(zevpn->vxlan_if))
                                zebra_evpn_send_add_to_client(zevpn);
                }
        }
        return 0;
}

/*
 * Handle SVI interface coming up.
 * SVI can be associated to L3-VNI (l3vni vxlan interface) or L2-VNI (l2-vni
 * vxlan intf).
 * For L2-VNI: we need to install any remote neighbors entried (used for
 * arp-suppression)
 * For L3-VNI: SVI will be used to get the rmac to be used with L3-VNI
 */
int zebra_vxlan_svi_up(struct interface *ifp, struct interface *link_if)
{
        struct zebra_evpn *zevpn = NULL;
        struct zebra_l3vni *zl3vni = NULL;

        zl3vni = zl3vni_from_svi(ifp, link_if);
        if (zl3vni) {

                /* associate with svi */
                zl3vni->svi_if = ifp;

                /* process oper-up */
                if (is_l3vni_oper_up(zl3vni))
                        zebra_vxlan_process_l3vni_oper_up(zl3vni);
        } else {

                /* process SVI up for l2-vni */
                struct neigh_walk_ctx n_wctx;

                zevpn = zebra_evpn_from_svi(ifp, link_if);
                if (!zevpn)
                        return 0;

                if (!zevpn->vxlan_if) {
                        zlog_debug(
                                "VNI %u hash %p doesn't have intf upon SVI up",
                                zevpn->vni, zevpn);
                        return -1;
                }

                if (IS_ZEBRA_DEBUG_VXLAN)
                        zlog_debug(
                                "SVI %s(%u) VNI %u VRF %s is UP, installing neighbors",
                                ifp->name, ifp->ifindex, zevpn->vni,
                                ifp->vrf->name);

                /* update the vrf information for l2-vni and inform bgp */
                zevpn->svi_if = ifp;
                zevpn->vrf_id = ifp->vrf->vrf_id;

                zl3vni = zl3vni_from_vrf(zevpn->vrf_id);
                if (zl3vni)
                        listnode_add_sort_nodup(zl3vni->l2vnis, zevpn);

                if (if_is_operative(zevpn->vxlan_if))
                        zebra_evpn_send_add_to_client(zevpn);

                /* Install any remote neighbors for this VNI. */
                memset(&n_wctx, 0, sizeof(n_wctx));
                n_wctx.zevpn = zevpn;
                hash_iterate(zevpn->neigh_table, zebra_evpn_install_neigh_hash,
                             &n_wctx);

                /* Link the SVI from the access VLAN */
                zebra_evpn_acc_bd_svi_set(ifp->info, link_if->info, true);

                /* Update MACIP routes created by advertise-svi-ip */
                if (advertise_svi_macip_enabled(zevpn)) {
                        zebra_evpn_del_macip_for_intf(ifp, zevpn);
                        zebra_evpn_add_macip_for_intf(ifp, zevpn);
                }
        }

        return 0;
}

/*
 * Handle MAC-VLAN interface going down.
 * L3VNI: When MAC-VLAN interface goes down,
 * find its associated SVI and update type2/type-5 routes
 * with SVI as RMAC
 */
void zebra_vxlan_macvlan_down(struct interface *ifp)
{
        struct zebra_l3vni *zl3vni = NULL;
        struct zebra_if *zif, *link_zif;
        struct interface *link_ifp, *link_if;

        zif = ifp->info;
        assert(zif);
        link_ifp = zif->link;
        if (!link_ifp) {
                if (IS_ZEBRA_DEBUG_VXLAN)
                        zlog_debug(
                                "macvlan parent link is not found. Parent index %d ifp %s",
                                zif->link_ifindex,
                                ifindex2ifname(zif->link_ifindex,
                                               ifp->vrf->vrf_id));
                return;
        }
        link_zif = link_ifp->info;
        assert(link_zif);

        link_if = if_lookup_by_index_per_ns(zebra_ns_lookup(NS_DEFAULT),
                                            link_zif->link_ifindex);

        zl3vni = zl3vni_from_svi(link_ifp, link_if);
        if (zl3vni) {
                zl3vni->mac_vlan_if = NULL;
                if (is_l3vni_oper_up(zl3vni))
                        zebra_vxlan_process_l3vni_oper_up(zl3vni);
        }
}

/*
 * Handle MAC-VLAN interface going up.
 * L3VNI: When MAC-VLAN interface comes up,
 * find its associated SVI and update type-2 routes
 * with MAC-VLAN's MAC as RMAC and for type-5 routes
 * use SVI's MAC as RMAC.
 */
void zebra_vxlan_macvlan_up(struct interface *ifp)
{
        struct zebra_l3vni *zl3vni = NULL;
        struct zebra_if *zif, *link_zif;
        struct interface *link_ifp, *link_if;

        zif = ifp->info;
        assert(zif);
        link_ifp = zif->link;
        link_zif = link_ifp->info;
        assert(link_zif);

        link_if = if_lookup_by_index_per_ns(zebra_ns_lookup(NS_DEFAULT),
                                            link_zif->link_ifindex);
        zl3vni = zl3vni_from_svi(link_ifp, link_if);
        if (zl3vni) {
                /* associate with macvlan (VRR) interface */
                zl3vni->mac_vlan_if = ifp;

                /* process oper-up */
                if (is_l3vni_oper_up(zl3vni))
                        zebra_vxlan_process_l3vni_oper_up(zl3vni);
        }
}

int zebra_vxlan_process_vrf_vni_cmd(struct zebra_vrf *zvrf, vni_t vni,
                                    char *err, int err_str_sz, int filter,
                                    int add)
{
        struct zebra_l3vni *zl3vni = NULL;
        struct zebra_vrf *zvrf_evpn = NULL;

        zvrf_evpn = zebra_vrf_get_evpn();

        if (IS_ZEBRA_DEBUG_VXLAN)
                zlog_debug("vrf %s vni %u %s", zvrf_name(zvrf), vni,
                           add ? "ADD" : "DEL");

        if (add) {
                /* check if the vni is already present under zvrf */
                if (zvrf->l3vni) {
                        snprintf(err, err_str_sz,
                                 "VNI is already configured under the vrf");
                        return -1;
                }

                /* check if this VNI is already present in the system */
                zl3vni = zl3vni_lookup(vni);
                if (zl3vni) {
                        snprintf(err, err_str_sz,
                                 "VNI is already configured as L3-VNI");
                        return -1;
                }

                /* Remove L2VNI if present */
                zebra_vxlan_handle_vni_transition(zvrf, vni, add);

                /* add the L3-VNI to the global table */
                zl3vni = zl3vni_add(vni, zvrf_id(zvrf));

                /* associate the vrf with vni */
                zvrf->l3vni = vni;

                /* set the filter in l3vni to denote if we are using l3vni only
                 * for prefix routes
                 */
                if (filter)
                        SET_FLAG(zl3vni->filter, PREFIX_ROUTES_ONLY);

                /* associate with vxlan-intf;
                 * we need to associate with the vxlan-intf first
                 */
                zl3vni->vxlan_if = zl3vni_map_to_vxlan_if(zl3vni);

                /* associate with corresponding SVI interface, we can associate
                 * with svi-if only after vxlan interface association is
                 * complete
                 */
                zl3vni->svi_if = zl3vni_map_to_svi_if(zl3vni);

                zl3vni->mac_vlan_if = zl3vni_map_to_mac_vlan_if(zl3vni);

                if (IS_ZEBRA_DEBUG_VXLAN)
                        zlog_debug(
                                "%s: l3vni %u svi_if %s mac_vlan_if %s",
                                __func__, vni,
                                zl3vni->svi_if ? zl3vni->svi_if->name : "NIL",
                                zl3vni->mac_vlan_if ? zl3vni->mac_vlan_if->name
                                                    : "NIL");

                /* formulate l2vni list */
                hash_iterate(zvrf_evpn->evpn_table, zevpn_add_to_l3vni_list,
                             zl3vni);

                if (is_l3vni_oper_up(zl3vni))
                        zebra_vxlan_process_l3vni_oper_up(zl3vni);

        } else {
                zl3vni = zl3vni_lookup(vni);
                if (!zl3vni) {
                        snprintf(err, err_str_sz, "VNI doesn't exist");
                        return -1;
                }

                if (zvrf->l3vni != vni) {
                        snprintf(err, err_str_sz,
                                        "VNI %d doesn't exist in VRF: %s",
                                        vni, zvrf->vrf->name);
                        return -1;
                }

                if (filter && !CHECK_FLAG(zl3vni->filter, PREFIX_ROUTES_ONLY)) {
                        snprintf(err, ERR_STR_SZ,
                                 "prefix-routes-only is not set for the vni");
                        return -1;
                }

                zebra_vxlan_process_l3vni_oper_down(zl3vni);

                /* delete and uninstall all rmacs */
                hash_iterate(zl3vni->rmac_table, zl3vni_del_rmac_hash_entry,
                             zl3vni);

                /* delete and uninstall all next-hops */
                hash_iterate(zl3vni->nh_table, zl3vni_del_nh_hash_entry,
                             zl3vni);

                zvrf->l3vni = 0;
                zl3vni_del(zl3vni);

                /* Add L2VNI for this VNI */
                zebra_vxlan_handle_vni_transition(zvrf, vni, add);
        }
        return 0;
}

int zebra_vxlan_vrf_enable(struct zebra_vrf *zvrf)
{
        struct zebra_l3vni *zl3vni = NULL;

        if (zvrf->l3vni)
                zl3vni = zl3vni_lookup(zvrf->l3vni);
        if (!zl3vni)
                return 0;

        zl3vni->vrf_id = zvrf_id(zvrf);
        if (is_l3vni_oper_up(zl3vni))
                zebra_vxlan_process_l3vni_oper_up(zl3vni);
        return 0;
}

int zebra_vxlan_vrf_disable(struct zebra_vrf *zvrf)
{
        struct zebra_l3vni *zl3vni = NULL;

        if (zvrf->l3vni)
                zl3vni = zl3vni_lookup(zvrf->l3vni);
        if (!zl3vni)
                return 0;

        zebra_vxlan_process_l3vni_oper_down(zl3vni);

        /* delete and uninstall all rmacs */
        hash_iterate(zl3vni->rmac_table, zl3vni_del_rmac_hash_entry, zl3vni);
        /* delete and uninstall all next-hops */
        hash_iterate(zl3vni->nh_table, zl3vni_del_nh_hash_entry, zl3vni);

        zl3vni->vrf_id = VRF_UNKNOWN;

        return 0;
}

int zebra_vxlan_vrf_delete(struct zebra_vrf *zvrf)
{
        struct zebra_l3vni *zl3vni = NULL;
        vni_t vni;

        if (zvrf->l3vni)
                zl3vni = zl3vni_lookup(zvrf->l3vni);
        if (!zl3vni)
                return 0;

        vni = zl3vni->vni;
        zl3vni_del(zl3vni);
        zebra_vxlan_handle_vni_transition(zvrf, vni, 0);

        return 0;
}

/*
 * Handle message from client to specify the flooding mechanism for
 * BUM packets. The default is to do head-end (ingress) replication
 * and the other supported option is to disable it. This applies to
 * all BUM traffic and disabling it applies to both the transmit and
 * receive direction.
 */
void zebra_vxlan_flood_control(ZAPI_HANDLER_ARGS)
{
        struct stream *s;
        enum vxlan_flood_control flood_ctrl;

        if (!EVPN_ENABLED(zvrf)) {
                zlog_err("EVPN flood control for non-EVPN VRF %u",
                         zvrf_id(zvrf));
                return;
        }

        s = msg;
        STREAM_GETC(s, flood_ctrl);

        if (IS_ZEBRA_DEBUG_VXLAN)
                zlog_debug("EVPN flood control %u, currently %u",
                           flood_ctrl, zvrf->vxlan_flood_ctrl);

        if (zvrf->vxlan_flood_ctrl == flood_ctrl)
                return;

        zvrf->vxlan_flood_ctrl = flood_ctrl;

        /* Install or uninstall flood entries corresponding to
         * remote VTEPs.
         */
        hash_iterate(zvrf->evpn_table, zebra_evpn_handle_flooding_remote_vteps,
                     zvrf);

stream_failure:
        return;
}

/*
 * Handle message from client to enable/disable advertisement of svi macip
 * routes
 */
void zebra_vxlan_advertise_svi_macip(ZAPI_HANDLER_ARGS)
{
        struct stream *s;
        int advertise;
        vni_t vni = 0;
        struct zebra_evpn *zevpn = NULL;
        struct interface *ifp = NULL;

        if (!EVPN_ENABLED(zvrf)) {
                zlog_debug("EVPN SVI-MACIP Adv for non-EVPN VRF %u",
                          zvrf_id(zvrf));
                return;
        }

        s = msg;
        STREAM_GETC(s, advertise);
        STREAM_GETL(s, vni);

        if (!vni) {
                if (IS_ZEBRA_DEBUG_VXLAN)
                        zlog_debug("EVPN SVI-MACIP Adv %s, currently %s",
                                   advertise ? "enabled" : "disabled",
                                   advertise_svi_macip_enabled(NULL)
                                           ? "enabled"
                                           : "disabled");

                if (zvrf->advertise_svi_macip == advertise)
                        return;


                if (advertise) {
                        zvrf->advertise_svi_macip = advertise;
                        hash_iterate(zvrf->evpn_table,
                                     zebra_evpn_gw_macip_add_for_evpn_hash,
                                     NULL);
                } else {
                        hash_iterate(zvrf->evpn_table,
                                     zebra_evpn_svi_macip_del_for_evpn_hash,
                                     NULL);
                        zvrf->advertise_svi_macip = advertise;
                }

        } else {
                struct zebra_if *zif = NULL;
                struct interface *vlan_if = NULL;
                struct zebra_vxlan_vni *zl2_info_vni;
                int old_advertise;

                zevpn = zebra_evpn_lookup(vni);
                if (!zevpn)
                        return;

                if (IS_ZEBRA_DEBUG_VXLAN)
                        zlog_debug(
                                "EVPN SVI macip Adv %s on VNI %d, currently %s",
                                advertise ? "enabled" : "disabled", vni,
                                advertise_svi_macip_enabled(zevpn)
                                        ? "enabled"
                                        : "disabled");

                old_advertise = advertise_svi_macip_enabled(zevpn);

                /* Store flag even though SVI is not present.
                 * Once SVI comes up triggers self MAC-IP route add.
                 */
                zevpn->advertise_svi_macip = advertise;
                if (advertise_svi_macip_enabled(zevpn) == old_advertise)
                        return;

                ifp = zevpn->vxlan_if;
                if (!ifp)
                        return;

                zif = ifp->info;

                /* If down or not mapped to a bridge, we're done. */
                if (!if_is_operative(ifp) || !zif->brslave_info.br_if)
                        return;

                zl2_info_vni = zebra_vxlan_if_vni_find(zif, vni);
                if (!zl2_info_vni)
                        return;

                vlan_if = zvni_map_to_svi(zl2_info_vni->access_vlan,
                                          zif->brslave_info.br_if);
                if (!vlan_if)
                        return;

                if (advertise) {
                        /* Add primary SVI MAC-IP */
                        zebra_evpn_add_macip_for_intf(vlan_if, zevpn);
                } else {
                        /* Del primary SVI MAC-IP */
                        zebra_evpn_del_macip_for_intf(vlan_if, zevpn);
                }
        }

stream_failure:
        return;
}

/*
 * Handle message from client to enable/disable advertisement of g/w macip
 * routes
 */
void zebra_vxlan_advertise_subnet(ZAPI_HANDLER_ARGS)
{
        struct stream *s;
        int advertise;
        vni_t vni = 0;
        struct zebra_evpn *zevpn = NULL;
        struct interface *ifp = NULL;
        struct zebra_if *zif = NULL;
        struct interface *vlan_if = NULL;
        struct zebra_vxlan_vni *zl2_info_vni = NULL;

        if (!EVPN_ENABLED(zvrf)) {
                zlog_debug("EVPN GW-MACIP Adv for non-EVPN VRF %u",
                          zvrf_id(zvrf));
                return;
        }

        s = msg;
        STREAM_GETC(s, advertise);
        STREAM_GET(&vni, s, 3);

        zevpn = zebra_evpn_lookup(vni);
        if (!zevpn)
                return;

        if (zevpn->advertise_subnet == advertise)
                return;

        if (IS_ZEBRA_DEBUG_VXLAN)
                zlog_debug("EVPN subnet Adv %s on VNI %d, currently %s",
                           advertise ? "enabled" : "disabled", vni,
                           zevpn->advertise_subnet ? "enabled" : "disabled");


        zevpn->advertise_subnet = advertise;

        ifp = zevpn->vxlan_if;
        if (!ifp)
                return;

        zif = ifp->info;

        /* If down or not mapped to a bridge, we're done. */
        if (!if_is_operative(ifp) || !zif->brslave_info.br_if)
                return;

        zl2_info_vni = zebra_vxlan_if_vni_find(zif, vni);
        if (!zl2_info_vni)
                return;

        vlan_if = zvni_map_to_svi(zl2_info_vni->access_vlan,
                                  zif->brslave_info.br_if);
        if (!vlan_if)
                return;

        if (zevpn->advertise_subnet)
                zebra_evpn_advertise_subnet(zevpn, vlan_if, 1);
        else
                zebra_evpn_advertise_subnet(zevpn, vlan_if, 0);

stream_failure:
        return;
}

/*
 * Handle message from client to enable/disable advertisement of g/w macip
 * routes
 */
void zebra_vxlan_advertise_gw_macip(ZAPI_HANDLER_ARGS)
{
        struct stream *s;
        int advertise;
        vni_t vni = 0;
        struct zebra_evpn *zevpn = NULL;
        struct interface *ifp = NULL;

        if (!EVPN_ENABLED(zvrf)) {
                zlog_debug("EVPN GW-MACIP Adv for non-EVPN VRF %u",
                           zvrf_id(zvrf));
                return;
        }

        s = msg;
        STREAM_GETC(s, advertise);
        STREAM_GETL(s, vni);

        if (!vni) {
                if (IS_ZEBRA_DEBUG_VXLAN)
                        zlog_debug("EVPN gateway macip Adv %s, currently %s",
                                   advertise ? "enabled" : "disabled",
                                   advertise_gw_macip_enabled(NULL)
                                           ? "enabled"
                                           : "disabled");

                if (zvrf->advertise_gw_macip == advertise)
                        return;

                zvrf->advertise_gw_macip = advertise;

                if (advertise_gw_macip_enabled(zevpn))
                        hash_iterate(zvrf->evpn_table,
                                     zebra_evpn_gw_macip_add_for_evpn_hash,
                                     NULL);
                else
                        hash_iterate(zvrf->evpn_table,
                                     zebra_evpn_gw_macip_del_for_evpn_hash,
                                     NULL);

        } else {
                struct zebra_if *zif = NULL;
                struct interface *vlan_if = NULL;
                struct interface *vrr_if = NULL;
                struct zebra_vxlan_vni *zl2_info_vni = NULL;
                int old_advertise;

                zevpn = zebra_evpn_lookup(vni);
                if (!zevpn)
                        return;

                if (IS_ZEBRA_DEBUG_VXLAN)
                        zlog_debug(
                                "EVPN gateway macip Adv %s on VNI %d, currently %s",
                                advertise ? "enabled" : "disabled", vni,
                                advertise_gw_macip_enabled(zevpn) ? "enabled"
                                                                  : "disabled");

                old_advertise = advertise_gw_macip_enabled(zevpn);

                zevpn->advertise_gw_macip = advertise;
                if (advertise_gw_macip_enabled(zevpn) == old_advertise)
                        return;

                ifp = zevpn->vxlan_if;
                if (!ifp)
                        return;

                zif = ifp->info;

                /* If down or not mapped to a bridge, we're done. */
                if (!if_is_operative(ifp) || !zif->brslave_info.br_if)
                        return;

                zl2_info_vni = zebra_vxlan_if_vni_find(zif, vni);
                if (!zl2_info_vni)
                        return;

                vlan_if = zvni_map_to_svi(zl2_info_vni->access_vlan,
                                          zif->brslave_info.br_if);
                if (!vlan_if)
                        return;

                if (advertise_gw_macip_enabled(zevpn)) {
                        /* Add primary SVI MAC-IP */
                        zebra_evpn_add_macip_for_intf(vlan_if, zevpn);

                        /* Add VRR MAC-IP - if any*/
                        vrr_if = zebra_get_vrr_intf_for_svi(vlan_if);
                        if (vrr_if)
                                zebra_evpn_add_macip_for_intf(vrr_if, zevpn);
                } else {
                        /* Del primary MAC-IP */
                        zebra_evpn_del_macip_for_intf(vlan_if, zevpn);

                        /* Del VRR MAC-IP - if any*/
                        vrr_if = zebra_get_vrr_intf_for_svi(vlan_if);
                        if (vrr_if)
                                zebra_evpn_del_macip_for_intf(vrr_if, zevpn);
                }
        }

stream_failure:
        return;
}

static int macfdb_read_ns(struct ns *ns,
                          void *_in_param __attribute__((unused)),
                          void **out_param __attribute__((unused)))
{
        struct zebra_ns *zns = ns->info;

        macfdb_read(zns);
        return NS_WALK_CONTINUE;
}

static int neigh_read_ns(struct ns *ns,
                         void *_in_param __attribute__((unused)),
                         void **out_param __attribute__((unused)))
{
        struct zebra_ns *zns = ns->info;

        neigh_read(zns);
        return NS_WALK_CONTINUE;
}

/*
 * Handle message from client to learn (or stop learning) about VNIs and MACs.
 * When enabled, the VNI hash table will be built and MAC FDB table read;
 * when disabled, the entries should be deleted and remote VTEPs and MACs
 * uninstalled from the kernel.
 * This also informs the setting for BUM handling at the time this change
 * occurs; it is relevant only when specifying "learn".
 */
void zebra_vxlan_advertise_all_vni(ZAPI_HANDLER_ARGS)
{
        struct stream *s = NULL;
        int advertise = 0;
        enum vxlan_flood_control flood_ctrl;

        /* Mismatch between EVPN VRF and current VRF (should be prevented by
         * bgpd's cli) */
        if (is_evpn_enabled() && !EVPN_ENABLED(zvrf))
                return;

        s = msg;
        STREAM_GETC(s, advertise);
        STREAM_GETC(s, flood_ctrl);

        if (IS_ZEBRA_DEBUG_VXLAN)
                zlog_debug("EVPN VRF %s(%u) VNI Adv %s, currently %s, flood control %u",
                           zvrf_name(zvrf), zvrf_id(zvrf),
                           advertise ? "enabled" : "disabled",
                           is_evpn_enabled() ? "enabled" : "disabled",
                           flood_ctrl);

        if (zvrf->advertise_all_vni == advertise)
                return;

        zvrf->advertise_all_vni = advertise;
        if (EVPN_ENABLED(zvrf)) {
                zrouter.evpn_vrf = zvrf;

                /* Note BUM handling */
                zvrf->vxlan_flood_ctrl = flood_ctrl;

                /* Replay all ESs */
                zebra_evpn_es_send_all_to_client(true /* add */);

                /* Build EVPN hash table and inform BGP. */
                zevpn_build_hash_table();

                /* Add all SVI (L3 GW) MACs to BGP*/
                hash_iterate(zvrf->evpn_table,
                             zebra_evpn_gw_macip_add_for_evpn_hash, NULL);

                /* Read the MAC FDB */
                ns_walk_func(macfdb_read_ns, NULL, NULL);

                /* Read neighbors */
                ns_walk_func(neigh_read_ns, NULL, NULL);
        } else {
                /* Cleanup VTEPs for all EVPNs - uninstall from
                 * kernel and free entries.
                 */
                hash_iterate(zvrf->evpn_table, zebra_evpn_vxlan_cleanup_all,
                             zvrf);

                /* Delete all ESs in BGP */
                zebra_evpn_es_send_all_to_client(false /* add */);

                /* cleanup all l3vnis */
                hash_iterate(zrouter.l3vni_table, zl3vni_cleanup_all, NULL);

                /* Mark as "no EVPN VRF" */
                zrouter.evpn_vrf = NULL;
        }

stream_failure:
        return;
}

/*
 * Allocate EVPN hash table for this VRF and do other initialization.
 * NOTE: Currently supported only for default VRF.
 */
void zebra_vxlan_init_tables(struct zebra_vrf *zvrf)
{
        char buffer[80];

        if (!zvrf)
                return;

        snprintf(buffer, sizeof(buffer), "Zebra VRF EVPN Table: %s",
                 zvrf->vrf->name);
        zvrf->evpn_table = hash_create_size(8, zebra_evpn_hash_keymake,
                                            zebra_evpn_hash_cmp, buffer);

        snprintf(buffer, sizeof(buffer), "Zebra VxLAN SG Table: %s",
                 zvrf->vrf->name);
        zvrf->vxlan_sg_table = hash_create_size(8, zebra_vxlan_sg_hash_key_make,
                                                zebra_vxlan_sg_hash_eq, buffer);
}

/* Cleanup EVPN info, but don't free the table. */
void zebra_vxlan_cleanup_tables(struct zebra_vrf *zvrf)
{
        struct zebra_vrf *evpn_zvrf = zebra_vrf_get_evpn();

        hash_iterate(zvrf->evpn_table, zebra_evpn_vxlan_cleanup_all, zvrf);
        zebra_vxlan_cleanup_sg_table(zvrf);

        if (zvrf == evpn_zvrf)
                zebra_evpn_es_cleanup();
}

/* Close all EVPN handling */
void zebra_vxlan_close_tables(struct zebra_vrf *zvrf)
{
        if (!zvrf)
                return;
        hash_iterate(zvrf->evpn_table, zebra_evpn_vxlan_cleanup_all, zvrf);
        hash_free(zvrf->evpn_table);
        if (zvrf->vxlan_sg_table) {
                zebra_vxlan_cleanup_sg_table(zvrf);
                hash_free(zvrf->vxlan_sg_table);
                zvrf->vxlan_sg_table = NULL;
        }
}

/* init the l3vni table */
void zebra_vxlan_init(void)
{
        zrouter.l3vni_table = hash_create(l3vni_hash_keymake, l3vni_hash_cmp,
                                          "Zebra VRF L3 VNI table");
        zrouter.evpn_vrf = NULL;
        zebra_evpn_mh_init();
}

/* free l3vni table */
void zebra_vxlan_disable(void)
{
        hash_free(zrouter.l3vni_table);
        zebra_evpn_mh_terminate();
}

/* get the l3vni svi ifindex */
ifindex_t get_l3vni_svi_ifindex(vrf_id_t vrf_id)
{
        struct zebra_l3vni *zl3vni = NULL;

        zl3vni = zl3vni_from_vrf(vrf_id);
        if (!zl3vni || !is_l3vni_oper_up(zl3vni))
                return 0;

        return zl3vni->svi_if->ifindex;
}

/************************** vxlan SG cache management ************************/
/* Inform PIM about the mcast group */
static int zebra_vxlan_sg_send(struct zebra_vrf *zvrf,
                struct prefix_sg *sg,
                char *sg_str, uint16_t cmd)
{
        struct zserv *client = NULL;
        struct stream *s = NULL;

        client = zserv_find_client(ZEBRA_ROUTE_PIM, 0);
        if (!client)
                return 0;

        if (!CHECK_FLAG(zvrf->flags, ZEBRA_PIM_SEND_VXLAN_SG))
                return 0;

        s = stream_new(ZEBRA_MAX_PACKET_SIZ);

        zclient_create_header(s, cmd, VRF_DEFAULT);
        stream_putl(s, IPV4_MAX_BYTELEN);
        stream_put(s, &sg->src.s_addr, IPV4_MAX_BYTELEN);
        stream_put(s, &sg->grp.s_addr, IPV4_MAX_BYTELEN);

        /* Write packet size. */
        stream_putw_at(s, 0, stream_get_endp(s));

        if (IS_ZEBRA_DEBUG_VXLAN)
                zlog_debug(
                        "Send %s %s to %s",
                        (cmd == ZEBRA_VXLAN_SG_ADD) ? "add" : "del", sg_str,
                        zebra_route_string(client->proto));

        if (cmd == ZEBRA_VXLAN_SG_ADD)
                client->vxlan_sg_add_cnt++;
        else
                client->vxlan_sg_del_cnt++;

        return zserv_send_message(client, s);
}

static unsigned int zebra_vxlan_sg_hash_key_make(const void *p)
{
        const struct zebra_vxlan_sg *vxlan_sg = p;

        return (jhash_2words(vxlan_sg->sg.src.s_addr,
                                vxlan_sg->sg.grp.s_addr, 0));
}

static bool zebra_vxlan_sg_hash_eq(const void *p1, const void *p2)
{
        const struct zebra_vxlan_sg *sg1 = p1;
        const struct zebra_vxlan_sg *sg2 = p2;

        return ((sg1->sg.src.s_addr == sg2->sg.src.s_addr)
                && (sg1->sg.grp.s_addr == sg2->sg.grp.s_addr));
}

static struct zebra_vxlan_sg *zebra_vxlan_sg_new(struct zebra_vrf *zvrf,
                                                 struct prefix_sg *sg)
{
        struct zebra_vxlan_sg *vxlan_sg;

        vxlan_sg = XCALLOC(MTYPE_ZVXLAN_SG, sizeof(*vxlan_sg));

        vxlan_sg->zvrf = zvrf;
        vxlan_sg->sg = *sg;
        prefix_sg2str(sg, vxlan_sg->sg_str);

        vxlan_sg = hash_get(zvrf->vxlan_sg_table, vxlan_sg, hash_alloc_intern);

        if (IS_ZEBRA_DEBUG_VXLAN)
                zlog_debug("vxlan SG %s created", vxlan_sg->sg_str);

        return vxlan_sg;
}

static struct zebra_vxlan_sg *zebra_vxlan_sg_find(struct zebra_vrf *zvrf,
                                                  struct prefix_sg *sg)
{
        struct zebra_vxlan_sg lookup;

        lookup.sg = *sg;
        return hash_lookup(zvrf->vxlan_sg_table, &lookup);
}

static struct zebra_vxlan_sg *zebra_vxlan_sg_add(struct zebra_vrf *zvrf,
                                                 struct prefix_sg *sg)
{
        struct zebra_vxlan_sg *vxlan_sg;
        struct zebra_vxlan_sg *parent = NULL;
        struct in_addr sip;

        vxlan_sg = zebra_vxlan_sg_find(zvrf, sg);
        if (vxlan_sg)
                return vxlan_sg;

        /* create a *G entry for every BUM group implicitly -
         * 1. The SG entry is used by pimd to setup the vxlan-origination-mroute
         * 2. the XG entry is used by pimd to setup the
         * vxlan-termination-mroute
         */
        if (sg->src.s_addr != INADDR_ANY) {
                memset(&sip, 0, sizeof(sip));
                parent = zebra_vxlan_sg_do_ref(zvrf, sip, sg->grp);
                if (!parent)
                        return NULL;
        }

        vxlan_sg = zebra_vxlan_sg_new(zvrf, sg);

        zebra_vxlan_sg_send(zvrf, sg, vxlan_sg->sg_str,
                        ZEBRA_VXLAN_SG_ADD);

        return vxlan_sg;
}

static void zebra_vxlan_sg_del(struct zebra_vxlan_sg *vxlan_sg)
{
        struct in_addr sip;
        struct zebra_vrf *zvrf;

        zvrf = vrf_info_lookup(VRF_DEFAULT);
        if (!zvrf)
                return;

        /* On SG entry deletion remove the reference to its parent XG
         * entry
         */
        if (vxlan_sg->sg.src.s_addr != INADDR_ANY) {
                memset(&sip, 0, sizeof(sip));
                zebra_vxlan_sg_do_deref(zvrf, sip, vxlan_sg->sg.grp);
        }

        zebra_vxlan_sg_send(zvrf, &vxlan_sg->sg,
                        vxlan_sg->sg_str, ZEBRA_VXLAN_SG_DEL);

        hash_release(vxlan_sg->zvrf->vxlan_sg_table, vxlan_sg);

        if (IS_ZEBRA_DEBUG_VXLAN)
                zlog_debug("VXLAN SG %s deleted", vxlan_sg->sg_str);

        XFREE(MTYPE_ZVXLAN_SG, vxlan_sg);
}

static void zebra_vxlan_sg_do_deref(struct zebra_vrf *zvrf,
                struct in_addr sip, struct in_addr mcast_grp)
{
        struct zebra_vxlan_sg *vxlan_sg;
        struct prefix_sg sg;

        sg.family = AF_INET;
        sg.prefixlen = IPV4_MAX_BYTELEN;
        sg.src = sip;
        sg.grp = mcast_grp;
        vxlan_sg = zebra_vxlan_sg_find(zvrf, &sg);
        if (!vxlan_sg)
                return;

        if (vxlan_sg->ref_cnt)
                --vxlan_sg->ref_cnt;

        if (!vxlan_sg->ref_cnt)
                zebra_vxlan_sg_del(vxlan_sg);
}

static struct zebra_vxlan_sg *zebra_vxlan_sg_do_ref(struct zebra_vrf *zvrf,
                                                    struct in_addr sip,
                                                    struct in_addr mcast_grp)
{
        struct zebra_vxlan_sg *vxlan_sg;
        struct prefix_sg sg;

        sg.family = AF_INET;
        sg.prefixlen = IPV4_MAX_BYTELEN;
        sg.src = sip;
        sg.grp = mcast_grp;
        vxlan_sg = zebra_vxlan_sg_add(zvrf, &sg);
        if (vxlan_sg)
                ++vxlan_sg->ref_cnt;

        return vxlan_sg;
}

void zebra_vxlan_sg_deref(struct in_addr local_vtep_ip,
                          struct in_addr mcast_grp)
{
        struct zebra_vrf *zvrf;

        if (local_vtep_ip.s_addr == INADDR_ANY
            || mcast_grp.s_addr == INADDR_ANY)
                return;

        zvrf = vrf_info_lookup(VRF_DEFAULT);
        if (!zvrf)
                return;

        zebra_vxlan_sg_do_deref(zvrf, local_vtep_ip, mcast_grp);
}

void zebra_vxlan_sg_ref(struct in_addr local_vtep_ip, struct in_addr mcast_grp)
{
        struct zebra_vrf *zvrf;

        if (local_vtep_ip.s_addr == INADDR_ANY
            || mcast_grp.s_addr == INADDR_ANY)
                return;

        zvrf = vrf_info_lookup(VRF_DEFAULT);
        if (!zvrf)
                return;
        zebra_vxlan_sg_do_ref(zvrf, local_vtep_ip, mcast_grp);
}

static void zebra_vxlan_xg_pre_cleanup(struct hash_bucket *bucket, void *arg)
{
        struct zebra_vxlan_sg *vxlan_sg = (struct zebra_vxlan_sg *)bucket->data;

        /* increment the ref count against (*,G) to prevent them from being
         * deleted
         */
        if (vxlan_sg->sg.src.s_addr == INADDR_ANY)
                ++vxlan_sg->ref_cnt;
}

static void zebra_vxlan_xg_post_cleanup(struct hash_bucket *bucket, void *arg)
{
        struct zebra_vxlan_sg *vxlan_sg = (struct zebra_vxlan_sg *)bucket->data;

        /* decrement the dummy ref count against (*,G) to delete them */
        if (vxlan_sg->sg.src.s_addr == INADDR_ANY) {
                if (vxlan_sg->ref_cnt)
                        --vxlan_sg->ref_cnt;
                if (!vxlan_sg->ref_cnt)
                        zebra_vxlan_sg_del(vxlan_sg);
        }
}

static void zebra_vxlan_sg_cleanup(struct hash_bucket *bucket, void *arg)
{
        struct zebra_vxlan_sg *vxlan_sg = (struct zebra_vxlan_sg *)bucket->data;

        zebra_vxlan_sg_del(vxlan_sg);
}

static void zebra_vxlan_cleanup_sg_table(struct zebra_vrf *zvrf)
{
        /* increment the ref count against (*,G) to prevent them from being
         * deleted
         */
        hash_iterate(zvrf->vxlan_sg_table, zebra_vxlan_xg_pre_cleanup, NULL);

        hash_iterate(zvrf->vxlan_sg_table, zebra_vxlan_sg_cleanup, NULL);

        /* decrement the dummy ref count against the XG entries */
        hash_iterate(zvrf->vxlan_sg_table, zebra_vxlan_xg_post_cleanup, NULL);
}

static void zebra_vxlan_sg_replay_send(struct hash_bucket *bucket, void *arg)
{
        struct zebra_vxlan_sg *vxlan_sg = (struct zebra_vxlan_sg *)bucket->data;

        zebra_vxlan_sg_send(vxlan_sg->zvrf, &vxlan_sg->sg,
                        vxlan_sg->sg_str, ZEBRA_VXLAN_SG_ADD);
}

/* Handle message from client to replay vxlan SG entries */
void zebra_vxlan_sg_replay(ZAPI_HANDLER_ARGS)
{
        if (IS_ZEBRA_DEBUG_VXLAN)
                zlog_debug("VxLAN SG updates to PIM, start");

        SET_FLAG(zvrf->flags, ZEBRA_PIM_SEND_VXLAN_SG);

        if (!EVPN_ENABLED(zvrf)) {
                if (IS_ZEBRA_DEBUG_VXLAN)
                        zlog_debug("VxLAN SG replay request on unexpected vrf %d",
                                   zvrf->vrf->vrf_id);
                return;
        }

        hash_iterate(zvrf->vxlan_sg_table, zebra_vxlan_sg_replay_send, NULL);
}


/* Cleanup EVPN configuration of a specific VRF */
static void zebra_evpn_vrf_cfg_cleanup(struct zebra_vrf *zvrf)
{
        struct zebra_l3vni *zl3vni = NULL;

        zvrf->advertise_all_vni = 0;
        zvrf->advertise_gw_macip = 0;
        zvrf->advertise_svi_macip = 0;
        zvrf->vxlan_flood_ctrl = VXLAN_FLOOD_HEAD_END_REPL;

        hash_iterate(zvrf->evpn_table, zebra_evpn_cfg_cleanup, NULL);

        if (zvrf->l3vni)
                zl3vni = zl3vni_lookup(zvrf->l3vni);
        if (zl3vni) {
                /* delete and uninstall all rmacs */
                hash_iterate(zl3vni->rmac_table, zl3vni_del_rmac_hash_entry,
                             zl3vni);
                /* delete and uninstall all next-hops */
                hash_iterate(zl3vni->nh_table, zl3vni_del_nh_hash_entry,
                             zl3vni);
        }
}

/* Cleanup BGP EVPN configuration upon client disconnect */
static int zebra_evpn_bgp_cfg_clean_up(struct zserv *client)
{
        struct vrf *vrf;
        struct zebra_vrf *zvrf;

        RB_FOREACH (vrf, vrf_id_head, &vrfs_by_id) {
                zvrf = vrf->info;
                if (zvrf)
                        zebra_evpn_vrf_cfg_cleanup(zvrf);
        }

        return 0;
}

static int zebra_evpn_pim_cfg_clean_up(struct zserv *client)
{
        struct zebra_vrf *zvrf = zebra_vrf_get_evpn();

        if (CHECK_FLAG(zvrf->flags, ZEBRA_PIM_SEND_VXLAN_SG)) {
                if (IS_ZEBRA_DEBUG_VXLAN)
                        zlog_debug("VxLAN SG updates to PIM, stop");
                UNSET_FLAG(zvrf->flags, ZEBRA_PIM_SEND_VXLAN_SG);
        }

        return 0;
}

static int zebra_evpn_cfg_clean_up(struct zserv *client)
{
        if (client->proto == ZEBRA_ROUTE_BGP)
                return zebra_evpn_bgp_cfg_clean_up(client);

        if (client->proto == ZEBRA_ROUTE_PIM)
                return zebra_evpn_pim_cfg_clean_up(client);

        return 0;
}

/*
 * Handle results for vxlan dataplane operations.
 */
extern void zebra_vxlan_handle_result(struct zebra_dplane_ctx *ctx)
{
        return;
}

/* Config knob for accepting lower sequence numbers */
void zebra_vxlan_set_accept_bgp_seq(bool set)
{
        accept_bgp_seq = set;
}

bool zebra_vxlan_get_accept_bgp_seq(void)
{
        return accept_bgp_seq;
}

/* Cleanup BGP EVPN configuration upon client disconnect */
extern void zebra_evpn_init(void)
{
        hook_register(zserv_client_close, zebra_evpn_cfg_clean_up);
}