+// SPDX-License-Identifier: GPL-2.0-or-later
/* BGP4 SNMP support
* Copyright (C) 1999, 2000 Kunihiro Ishiguro
- *
- * This file is part of GNU Zebra.
- *
- * GNU Zebra is free software; you can redistribute it and/or modify it
- * under the terms of the GNU General Public License as published by the
- * Free Software Foundation; either version 2, or (at your option) any
- * later version.
- *
- * GNU Zebra is distributed in the hope that it will be useful, but
- * WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- * General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License along
- * with this program; see the file COPYING; if not, write to the Free Software
- * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include <zebra.h>
#include "bgpd/bgp_attr.h"
#include "bgpd/bgp_route.h"
#include "bgpd/bgp_fsm.h"
+#include "bgpd/bgp_snmp.h"
+#include "bgpd/bgp_snmp_bgp4.h"
+#include "bgpd/bgp_snmp_bgp4v2.h"
#include "bgpd/bgp_mplsvpn_snmp.h"
-/* BGP4-MIB described in RFC1657. */
-#define BGP4MIB 1,3,6,1,2,1,15
-
-/* BGP TRAP. */
-#define BGPESTABLISHED 1
-#define BGPBACKWARDTRANSITION 2
-
-/* BGP MIB bgpVersion. */
-#define BGPVERSION 0
-
-/* BGP MIB bgpLocalAs. */
-#define BGPLOCALAS 0
-
-/* BGP MIB bgpPeerTable. */
-#define BGPPEERIDENTIFIER 1
-#define BGPPEERSTATE 2
-#define BGPPEERADMINSTATUS 3
-#define BGPPEERNEGOTIATEDVERSION 4
-#define BGPPEERLOCALADDR 5
-#define BGPPEERLOCALPORT 6
-#define BGPPEERREMOTEADDR 7
-#define BGPPEERREMOTEPORT 8
-#define BGPPEERREMOTEAS 9
-#define BGPPEERINUPDATES 10
-#define BGPPEEROUTUPDATES 11
-#define BGPPEERINTOTALMESSAGES 12
-#define BGPPEEROUTTOTALMESSAGES 13
-#define BGPPEERLASTERROR 14
-#define BGPPEERFSMESTABLISHEDTRANSITIONS 15
-#define BGPPEERFSMESTABLISHEDTIME 16
-#define BGPPEERCONNECTRETRYINTERVAL 17
-#define BGPPEERHOLDTIME 18
-#define BGPPEERKEEPALIVE 19
-#define BGPPEERHOLDTIMECONFIGURED 20
-#define BGPPEERKEEPALIVECONFIGURED 21
-#define BGPPEERMINROUTEADVERTISEMENTINTERVAL 22
-#define BGPPEERINUPDATEELAPSEDTIME 23
-
-/* BGP MIB bgpIdentifier. */
-#define BGPIDENTIFIER 0
-
-/* BGP MIB bgpRcvdPathAttrTable */
-#define BGPPATHATTRPEER 1
-#define BGPPATHATTRDESTNETWORK 2
-#define BGPPATHATTRORIGIN 3
-#define BGPPATHATTRASPATH 4
-#define BGPPATHATTRNEXTHOP 5
-#define BGPPATHATTRINTERASMETRIC 6
-
-/* BGP MIB bgp4PathAttrTable. */
-#define BGP4PATHATTRPEER 1
-#define BGP4PATHATTRIPADDRPREFIXLEN 2
-#define BGP4PATHATTRIPADDRPREFIX 3
-#define BGP4PATHATTRORIGIN 4
-#define BGP4PATHATTRASPATHSEGMENT 5
-#define BGP4PATHATTRNEXTHOP 6
-#define BGP4PATHATTRMULTIEXITDISC 7
-#define BGP4PATHATTRLOCALPREF 8
-#define BGP4PATHATTRATOMICAGGREGATE 9
-#define BGP4PATHATTRAGGREGATORAS 10
-#define BGP4PATHATTRAGGREGATORADDR 11
-#define BGP4PATHATTRCALCLOCALPREF 12
-#define BGP4PATHATTRBEST 13
-#define BGP4PATHATTRUNKNOWN 14
-
-/* SNMP value hack. */
-#define INTEGER ASN_INTEGER
-#define INTEGER32 ASN_INTEGER
-#define COUNTER32 ASN_COUNTER
-#define OCTET_STRING ASN_OCTET_STR
-#define IPADDRESS ASN_IPADDRESS
-#define GAUGE32 ASN_UNSIGNED
-
-/* Declare static local variables for convenience. */
-SNMP_LOCAL_VARIABLES
-
-/* BGP-MIB instances. */
-static oid bgp_oid[] = {BGP4MIB};
-static oid bgp_trap_oid[] = {BGP4MIB, 0};
-
-/* IP address 0.0.0.0. */
-static struct in_addr bgp_empty_addr = {.s_addr = 0};
-
-/* Hook functions. */
-static uint8_t *bgpVersion(struct variable *, oid[], size_t *, int, size_t *,
- WriteMethod **);
-static uint8_t *bgpLocalAs(struct variable *, oid[], size_t *, int, size_t *,
- WriteMethod **);
-static uint8_t *bgpPeerTable(struct variable *, oid[], size_t *, int, size_t *,
- WriteMethod **);
-static uint8_t *bgpRcvdPathAttrTable(struct variable *, oid[], size_t *, int,
- size_t *, WriteMethod **);
-static uint8_t *bgpIdentifier(struct variable *, oid[], size_t *, int, size_t *,
- WriteMethod **);
-static uint8_t *bgp4PathAttrTable(struct variable *, oid[], size_t *, int,
- size_t *, WriteMethod **);
-/* static uint8_t *bgpTraps (); */
-
-static struct variable bgp_variables[] = {
- /* BGP version. */
- {BGPVERSION, OCTET_STRING, RONLY, bgpVersion, 1, {1}},
- /* BGP local AS. */
- {BGPLOCALAS, INTEGER, RONLY, bgpLocalAs, 1, {2}},
- /* BGP peer table. */
- {BGPPEERIDENTIFIER, IPADDRESS, RONLY, bgpPeerTable, 3, {3, 1, 1}},
- {BGPPEERSTATE, INTEGER, RONLY, bgpPeerTable, 3, {3, 1, 2}},
- {BGPPEERADMINSTATUS, INTEGER, RWRITE, bgpPeerTable, 3, {3, 1, 3}},
- {BGPPEERNEGOTIATEDVERSION,
- INTEGER32,
- RONLY,
- bgpPeerTable,
- 3,
- {3, 1, 4}},
- {BGPPEERLOCALADDR, IPADDRESS, RONLY, bgpPeerTable, 3, {3, 1, 5}},
- {BGPPEERLOCALPORT, INTEGER, RONLY, bgpPeerTable, 3, {3, 1, 6}},
- {BGPPEERREMOTEADDR, IPADDRESS, RONLY, bgpPeerTable, 3, {3, 1, 7}},
- {BGPPEERREMOTEPORT, INTEGER, RONLY, bgpPeerTable, 3, {3, 1, 8}},
- {BGPPEERREMOTEAS, INTEGER, RONLY, bgpPeerTable, 3, {3, 1, 9}},
- {BGPPEERINUPDATES, COUNTER32, RONLY, bgpPeerTable, 3, {3, 1, 10}},
- {BGPPEEROUTUPDATES, COUNTER32, RONLY, bgpPeerTable, 3, {3, 1, 11}},
- {BGPPEERINTOTALMESSAGES, COUNTER32, RONLY, bgpPeerTable, 3, {3, 1, 12}},
- {BGPPEEROUTTOTALMESSAGES,
- COUNTER32,
- RONLY,
- bgpPeerTable,
- 3,
- {3, 1, 13}},
- {BGPPEERLASTERROR, OCTET_STRING, RONLY, bgpPeerTable, 3, {3, 1, 14}},
- {BGPPEERFSMESTABLISHEDTRANSITIONS,
- COUNTER32,
- RONLY,
- bgpPeerTable,
- 3,
- {3, 1, 15}},
- {BGPPEERFSMESTABLISHEDTIME,
- GAUGE32,
- RONLY,
- bgpPeerTable,
- 3,
- {3, 1, 16}},
- {BGPPEERCONNECTRETRYINTERVAL,
- INTEGER,
- RWRITE,
- bgpPeerTable,
- 3,
- {3, 1, 17}},
- {BGPPEERHOLDTIME, INTEGER, RONLY, bgpPeerTable, 3, {3, 1, 18}},
- {BGPPEERKEEPALIVE, INTEGER, RONLY, bgpPeerTable, 3, {3, 1, 19}},
- {BGPPEERHOLDTIMECONFIGURED,
- INTEGER,
- RWRITE,
- bgpPeerTable,
- 3,
- {3, 1, 20}},
- {BGPPEERKEEPALIVECONFIGURED,
- INTEGER,
- RWRITE,
- bgpPeerTable,
- 3,
- {3, 1, 21}},
- {BGPPEERMINROUTEADVERTISEMENTINTERVAL,
- INTEGER,
- RWRITE,
- bgpPeerTable,
- 3,
- {3, 1, 23}},
- {BGPPEERINUPDATEELAPSEDTIME,
- GAUGE32,
- RONLY,
- bgpPeerTable,
- 3,
- {3, 1, 24}},
- /* BGP identifier. */
- {BGPIDENTIFIER, IPADDRESS, RONLY, bgpIdentifier, 1, {4}},
- /* BGP received path attribute table. */
- {BGPPATHATTRPEER, IPADDRESS, RONLY, bgpRcvdPathAttrTable, 3, {5, 1, 1}},
- {BGPPATHATTRDESTNETWORK,
- IPADDRESS,
- RONLY,
- bgpRcvdPathAttrTable,
- 3,
- {5, 1, 2}},
- {BGPPATHATTRORIGIN, INTEGER, RONLY, bgpRcvdPathAttrTable, 3, {5, 1, 3}},
- {BGPPATHATTRASPATH,
- OCTET_STRING,
- RONLY,
- bgpRcvdPathAttrTable,
- 3,
- {5, 1, 4}},
- {BGPPATHATTRNEXTHOP,
- IPADDRESS,
- RONLY,
- bgpRcvdPathAttrTable,
- 3,
- {5, 1, 5}},
- {BGPPATHATTRINTERASMETRIC,
- INTEGER32,
- RONLY,
- bgpRcvdPathAttrTable,
- 3,
- {5, 1, 6}},
- /* BGP-4 received path attribute table. */
- {BGP4PATHATTRPEER, IPADDRESS, RONLY, bgp4PathAttrTable, 3, {6, 1, 1}},
- {BGP4PATHATTRIPADDRPREFIXLEN,
- INTEGER,
- RONLY,
- bgp4PathAttrTable,
- 3,
- {6, 1, 2}},
- {BGP4PATHATTRIPADDRPREFIX,
- IPADDRESS,
- RONLY,
- bgp4PathAttrTable,
- 3,
- {6, 1, 3}},
- {BGP4PATHATTRORIGIN, INTEGER, RONLY, bgp4PathAttrTable, 3, {6, 1, 4}},
- {BGP4PATHATTRASPATHSEGMENT,
- OCTET_STRING,
- RONLY,
- bgp4PathAttrTable,
- 3,
- {6, 1, 5}},
- {BGP4PATHATTRNEXTHOP,
- IPADDRESS,
- RONLY,
- bgp4PathAttrTable,
- 3,
- {6, 1, 6}},
- {BGP4PATHATTRMULTIEXITDISC,
- INTEGER,
- RONLY,
- bgp4PathAttrTable,
- 3,
- {6, 1, 7}},
- {BGP4PATHATTRLOCALPREF,
- INTEGER,
- RONLY,
- bgp4PathAttrTable,
- 3,
- {6, 1, 8}},
- {BGP4PATHATTRATOMICAGGREGATE,
- INTEGER,
- RONLY,
- bgp4PathAttrTable,
- 3,
- {6, 1, 9}},
- {BGP4PATHATTRAGGREGATORAS,
- INTEGER,
- RONLY,
- bgp4PathAttrTable,
- 3,
- {6, 1, 10}},
- {BGP4PATHATTRAGGREGATORADDR,
- IPADDRESS,
- RONLY,
- bgp4PathAttrTable,
- 3,
- {6, 1, 11}},
- {BGP4PATHATTRCALCLOCALPREF,
- INTEGER,
- RONLY,
- bgp4PathAttrTable,
- 3,
- {6, 1, 12}},
- {BGP4PATHATTRBEST, INTEGER, RONLY, bgp4PathAttrTable, 3, {6, 1, 13}},
- {BGP4PATHATTRUNKNOWN,
- OCTET_STRING,
- RONLY,
- bgp4PathAttrTable,
- 3,
- {6, 1, 14}},
-};
-
-
-static uint8_t *bgpVersion(struct variable *v, oid name[], size_t *length,
- int exact, size_t *var_len,
- WriteMethod **write_method)
-{
- static uint8_t version;
-
- if (smux_header_generic(v, name, length, exact, var_len, write_method)
- == MATCH_FAILED)
- return NULL;
-
- /* Return BGP version. Zebra bgpd only support version 4. */
- version = (0x80 >> (BGP_VERSION_4 - 1));
-
- /* Return octet string length 1. */
- *var_len = 1;
- return &version;
-}
-
-static uint8_t *bgpLocalAs(struct variable *v, oid name[], size_t *length,
- int exact, size_t *var_len,
- WriteMethod **write_method)
-{
- struct bgp *bgp;
-
- if (smux_header_generic(v, name, length, exact, var_len, write_method)
- == MATCH_FAILED)
- return NULL;
-
- /* Get BGP structure. */
- bgp = bgp_get_default();
- if (!bgp)
- return NULL;
-
- return SNMP_INTEGER(bgp->as);
-}
-
-static struct peer *peer_lookup_addr_ipv4(struct in_addr *src)
-{
- struct bgp *bgp;
- struct peer *peer;
- struct listnode *node;
- struct listnode *bgpnode;
-
- for (ALL_LIST_ELEMENTS_RO(bm->bgp, bgpnode, bgp)) {
- for (ALL_LIST_ELEMENTS_RO(bgp->peer, node, peer)) {
- if (sockunion_family(&peer->su) != AF_INET)
- continue;
-
- if (sockunion2ip(&peer->su) == src->s_addr)
- return peer;
- }
- }
-
- return NULL;
-}
-
-static struct peer *bgp_peer_lookup_next(struct in_addr *src)
-{
- struct bgp *bgp;
- struct peer *peer;
- struct peer *next_peer = NULL;
- struct listnode *node;
- struct listnode *bgpnode;
-
- for (ALL_LIST_ELEMENTS_RO(bm->bgp, bgpnode, bgp)) {
- for (ALL_LIST_ELEMENTS_RO(bgp->peer, node, peer)) {
- if (sockunion_family(&peer->su) != AF_INET)
- continue;
- if (ntohl(sockunion2ip(&peer->su)) <= ntohl(src->s_addr))
- continue;
-
- if (!next_peer
- || ntohl(sockunion2ip(&next_peer->su))
- > ntohl(sockunion2ip(&peer->su))) {
- next_peer = peer;
- }
- }
- }
-
- if (next_peer) {
- src->s_addr = sockunion2ip(&next_peer->su);
- return next_peer;
- }
-
- return NULL;
-}
-
-/* 1.3.6.1.2.1.15.3.1.x = 10 */
-#define PEERTAB_NAMELEN 10
-
-static struct peer *bgpPeerTable_lookup(struct variable *v, oid name[],
- size_t *length, struct in_addr *addr,
- int exact)
-{
- struct peer *peer = NULL;
- size_t namelen = v ? v->namelen : PEERTAB_NAMELEN;
- int len;
-
- if (exact) {
- /* Check the length. */
- if (*length - namelen != sizeof(struct in_addr))
- return NULL;
-
- oid2in_addr(name + namelen, IN_ADDR_SIZE, addr);
-
- peer = peer_lookup_addr_ipv4(addr);
- return peer;
- } else {
- len = *length - namelen;
- if (len > 4)
- len = 4;
-
- oid2in_addr(name + namelen, len, addr);
-
- peer = bgp_peer_lookup_next(addr);
-
- if (peer == NULL)
- return NULL;
-
- oid_copy_in_addr(name + namelen, addr);
- *length = sizeof(struct in_addr) + namelen;
-
- return peer;
- }
- return NULL;
-}
-
-/* BGP write methods. */
-static int write_bgpPeerTable(int action, uint8_t *var_val,
- uint8_t var_val_type, size_t var_val_len,
- uint8_t *statP, oid *name, size_t length)
-{
- struct in_addr addr;
- struct peer *peer;
- long intval;
-
- if (var_val_type != ASN_INTEGER) {
- return SNMP_ERR_WRONGTYPE;
- }
- if (var_val_len != sizeof(long)) {
- return SNMP_ERR_WRONGLENGTH;
- }
-
- intval = *(long *)var_val;
-
- memset(&addr, 0, sizeof(struct in_addr));
-
- peer = bgpPeerTable_lookup(NULL, name, &length, &addr, 1);
- if (!peer)
- return SNMP_ERR_NOSUCHNAME;
-
- if (action != SNMP_MSG_INTERNAL_SET_COMMIT)
- return SNMP_ERR_NOERROR;
-
- zlog_info("%s: SNMP write .%ld = %ld", peer->host,
- (long)name[PEERTAB_NAMELEN - 1], intval);
-
- switch (name[PEERTAB_NAMELEN - 1]) {
- case BGPPEERADMINSTATUS:
-#define BGP_PeerAdmin_stop 1
-#define BGP_PeerAdmin_start 2
- /* When the peer is established, */
- if (intval == BGP_PeerAdmin_stop)
- BGP_EVENT_ADD(peer, BGP_Stop);
- else if (intval == BGP_PeerAdmin_start)
- ; /* Do nothing. */
- else
- return SNMP_ERR_NOSUCHNAME;
- break;
- case BGPPEERCONNECTRETRYINTERVAL:
- peer_flag_set(peer, PEER_FLAG_TIMER_CONNECT);
- peer->connect = intval;
- peer->v_connect = intval;
- break;
- case BGPPEERHOLDTIMECONFIGURED:
- peer_flag_set(peer, PEER_FLAG_TIMER);
- peer->holdtime = intval;
- peer->v_holdtime = intval;
- break;
- case BGPPEERKEEPALIVECONFIGURED:
- peer_flag_set(peer, PEER_FLAG_TIMER);
- peer->keepalive = intval;
- peer->v_keepalive = intval;
- break;
- case BGPPEERMINROUTEADVERTISEMENTINTERVAL:
- peer->v_routeadv = intval;
- break;
- }
- return SNMP_ERR_NOERROR;
-}
-
-static uint8_t *bgpPeerTable(struct variable *v, oid name[], size_t *length,
- int exact, size_t *var_len,
- WriteMethod **write_method)
-{
- static struct in_addr addr;
- struct peer *peer;
- uint32_t ui, uo;
-
- if (smux_header_table(v, name, length, exact, var_len, write_method)
- == MATCH_FAILED)
- return NULL;
- memset(&addr, 0, sizeof(struct in_addr));
-
- peer = bgpPeerTable_lookup(v, name, length, &addr, exact);
- if (!peer)
- return NULL;
-
- switch (v->magic) {
- case BGPPEERIDENTIFIER:
- return SNMP_IPADDRESS(peer->remote_id);
- case BGPPEERSTATE:
- return SNMP_INTEGER(peer->status);
- case BGPPEERADMINSTATUS:
- *write_method = write_bgpPeerTable;
-#define BGP_PeerAdmin_stop 1
-#define BGP_PeerAdmin_start 2
- if (CHECK_FLAG(peer->flags, PEER_FLAG_SHUTDOWN))
- return SNMP_INTEGER(BGP_PeerAdmin_stop);
- else
- return SNMP_INTEGER(BGP_PeerAdmin_start);
- case BGPPEERNEGOTIATEDVERSION:
- return SNMP_INTEGER(BGP_VERSION_4);
- case BGPPEERLOCALADDR:
- if (peer->su_local)
- return SNMP_IPADDRESS(peer->su_local->sin.sin_addr);
- else
- return SNMP_IPADDRESS(bgp_empty_addr);
- case BGPPEERLOCALPORT:
- if (peer->su_local)
- return SNMP_INTEGER(
- ntohs(peer->su_local->sin.sin_port));
- else
- return SNMP_INTEGER(0);
- case BGPPEERREMOTEADDR:
- if (peer->su_remote)
- return SNMP_IPADDRESS(peer->su_remote->sin.sin_addr);
- else
- return SNMP_IPADDRESS(bgp_empty_addr);
- case BGPPEERREMOTEPORT:
- if (peer->su_remote)
- return SNMP_INTEGER(
- ntohs(peer->su_remote->sin.sin_port));
- else
- return SNMP_INTEGER(0);
- case BGPPEERREMOTEAS:
- return SNMP_INTEGER(peer->as);
- case BGPPEERINUPDATES:
- ui = atomic_load_explicit(&peer->update_in,
- memory_order_relaxed);
- return SNMP_INTEGER(ui);
- case BGPPEEROUTUPDATES:
- uo = atomic_load_explicit(&peer->update_out,
- memory_order_relaxed);
- return SNMP_INTEGER(uo);
- case BGPPEERINTOTALMESSAGES:
- return SNMP_INTEGER(PEER_TOTAL_RX(peer));
- case BGPPEEROUTTOTALMESSAGES:
- return SNMP_INTEGER(PEER_TOTAL_TX(peer));
- case BGPPEERLASTERROR: {
- static uint8_t lasterror[2];
- lasterror[0] = peer->notify.code;
- lasterror[1] = peer->notify.subcode;
- *var_len = 2;
- return (uint8_t *)&lasterror;
- }
- case BGPPEERFSMESTABLISHEDTRANSITIONS:
- return SNMP_INTEGER(peer->established);
- case BGPPEERFSMESTABLISHEDTIME:
- if (peer->uptime == 0)
- return SNMP_INTEGER(0);
- else
- return SNMP_INTEGER(bgp_clock() - peer->uptime);
- case BGPPEERCONNECTRETRYINTERVAL:
- *write_method = write_bgpPeerTable;
- return SNMP_INTEGER(peer->v_connect);
- case BGPPEERHOLDTIME:
- return SNMP_INTEGER(peer->v_holdtime);
- case BGPPEERKEEPALIVE:
- return SNMP_INTEGER(peer->v_keepalive);
- case BGPPEERHOLDTIMECONFIGURED:
- *write_method = write_bgpPeerTable;
- if (CHECK_FLAG(peer->flags, PEER_FLAG_TIMER))
- return SNMP_INTEGER(peer->holdtime);
- else
- return SNMP_INTEGER(peer->v_holdtime);
- case BGPPEERKEEPALIVECONFIGURED:
- *write_method = write_bgpPeerTable;
- if (CHECK_FLAG(peer->flags, PEER_FLAG_TIMER))
- return SNMP_INTEGER(peer->keepalive);
- else
- return SNMP_INTEGER(peer->v_keepalive);
- case BGPPEERMINROUTEADVERTISEMENTINTERVAL:
- *write_method = write_bgpPeerTable;
- return SNMP_INTEGER(peer->v_routeadv);
- case BGPPEERINUPDATEELAPSEDTIME:
- if (peer->update_time == 0)
- return SNMP_INTEGER(0);
- else
- return SNMP_INTEGER(bgp_clock() - peer->update_time);
- default:
- return NULL;
- }
- return NULL;
-}
-
-static uint8_t *bgpIdentifier(struct variable *v, oid name[], size_t *length,
- int exact, size_t *var_len,
- WriteMethod **write_method)
-{
- struct bgp *bgp;
-
- if (smux_header_generic(v, name, length, exact, var_len, write_method)
- == MATCH_FAILED)
- return NULL;
-
- bgp = bgp_get_default();
- if (!bgp)
- return NULL;
-
- return SNMP_IPADDRESS(bgp->router_id);
-}
-
-static uint8_t *bgpRcvdPathAttrTable(struct variable *v, oid name[],
- size_t *length, int exact, size_t *var_len,
- WriteMethod **write_method)
-{
- /* Received Path Attribute Table. This table contains, one entry
- per path to a network, path attributes received from all peers
- running BGP version 3 or less. This table is obsolete, having
- been replaced in functionality with the bgp4PathAttrTable. */
- return NULL;
-}
-
-static struct bgp_path_info *bgp4PathAttrLookup(struct variable *v, oid name[],
- size_t *length, struct bgp *bgp,
- struct prefix_ipv4 *addr,
- int exact)
-{
- oid *offset;
- int offsetlen;
- struct bgp_path_info *path;
- struct bgp_path_info *min;
- struct bgp_dest *dest;
- union sockunion su;
- unsigned int len;
- struct in_addr paddr;
-
- sockunion_init(&su);
-
-#define BGP_PATHATTR_ENTRY_OFFSET (IN_ADDR_SIZE + 1 + IN_ADDR_SIZE)
-
- if (exact) {
- if (*length - v->namelen != BGP_PATHATTR_ENTRY_OFFSET)
- return NULL;
-
- /* Set OID offset for prefix. */
- offset = name + v->namelen;
- oid2in_addr(offset, IN_ADDR_SIZE, &addr->prefix);
- offset += IN_ADDR_SIZE;
-
- /* Prefix length. */
- addr->prefixlen = *offset;
- offset++;
-
- /* Peer address. */
- su.sin.sin_family = AF_INET;
- oid2in_addr(offset, IN_ADDR_SIZE, &su.sin.sin_addr);
-
- /* Lookup node. */
- dest = bgp_node_lookup(bgp->rib[AFI_IP][SAFI_UNICAST],
- (struct prefix *)addr);
- if (dest) {
- for (path = bgp_dest_get_bgp_path_info(dest); path;
- path = path->next)
- if (sockunion_same(&path->peer->su, &su))
- return path;
-
- bgp_dest_unlock_node(dest);
- }
- } else {
- offset = name + v->namelen;
- offsetlen = *length - v->namelen;
- len = offsetlen;
-
- if (offsetlen == 0)
- dest = bgp_table_top(bgp->rib[AFI_IP][SAFI_UNICAST]);
- else {
- if (len > IN_ADDR_SIZE)
- len = IN_ADDR_SIZE;
-
- oid2in_addr(offset, len, &addr->prefix);
-
- offset += IN_ADDR_SIZE;
- offsetlen -= IN_ADDR_SIZE;
-
- if (offsetlen > 0)
- addr->prefixlen = *offset;
- else
- addr->prefixlen = len * 8;
-
- dest = bgp_node_get(bgp->rib[AFI_IP][SAFI_UNICAST],
- (struct prefix *)addr);
-
- offset++;
- offsetlen--;
- }
-
- if (offsetlen > 0) {
- len = offsetlen;
- if (len > IN_ADDR_SIZE)
- len = IN_ADDR_SIZE;
-
- oid2in_addr(offset, len, &paddr);
- } else
- paddr.s_addr = INADDR_ANY;
-
- if (!dest)
- return NULL;
-
- do {
- min = NULL;
-
- for (path = bgp_dest_get_bgp_path_info(dest); path;
- path = path->next) {
- if (path->peer->su.sin.sin_family == AF_INET
- && ntohl(paddr.s_addr)
- < ntohl(path->peer->su.sin
- .sin_addr
- .s_addr)) {
- if (min) {
- if (ntohl(path->peer->su.sin
- .sin_addr
- .s_addr)
- < ntohl(min->peer->su.sin
- .sin_addr
- .s_addr))
- min = path;
- } else
- min = path;
- }
- }
-
- if (min) {
- const struct prefix *rn_p =
- bgp_dest_get_prefix(dest);
-
- *length =
- v->namelen + BGP_PATHATTR_ENTRY_OFFSET;
-
- offset = name + v->namelen;
- oid_copy_in_addr(offset, &rn_p->u.prefix4);
- offset += IN_ADDR_SIZE;
- *offset = rn_p->prefixlen;
- offset++;
- oid_copy_in_addr(offset,
- &min->peer->su.sin.sin_addr);
- addr->prefix = rn_p->u.prefix4;
- addr->prefixlen = rn_p->prefixlen;
-
- bgp_dest_unlock_node(dest);
-
- return min;
- }
-
- paddr.s_addr = INADDR_ANY;
- } while ((dest = bgp_route_next(dest)) != NULL);
- }
- return NULL;
-}
-
-static uint8_t *bgp4PathAttrTable(struct variable *v, oid name[],
- size_t *length, int exact, size_t *var_len,
- WriteMethod **write_method)
-{
- struct bgp *bgp;
- struct bgp_path_info *path;
- struct prefix_ipv4 addr;
-
- bgp = bgp_get_default();
- if (!bgp)
- return NULL;
-
- if (smux_header_table(v, name, length, exact, var_len, write_method)
- == MATCH_FAILED)
- return NULL;
- memset(&addr, 0, sizeof(struct prefix_ipv4));
-
- path = bgp4PathAttrLookup(v, name, length, bgp, &addr, exact);
- if (!path)
- return NULL;
-
- switch (v->magic) {
- case BGP4PATHATTRPEER: /* 1 */
- return SNMP_IPADDRESS(path->peer->su.sin.sin_addr);
- case BGP4PATHATTRIPADDRPREFIXLEN: /* 2 */
- return SNMP_INTEGER(addr.prefixlen);
- case BGP4PATHATTRIPADDRPREFIX: /* 3 */
- return SNMP_IPADDRESS(addr.prefix);
- case BGP4PATHATTRORIGIN: /* 4 */
- return SNMP_INTEGER(path->attr->origin);
- case BGP4PATHATTRASPATHSEGMENT: /* 5 */
- return aspath_snmp_pathseg(path->attr->aspath, var_len);
- case BGP4PATHATTRNEXTHOP: /* 6 */
- return SNMP_IPADDRESS(path->attr->nexthop);
- case BGP4PATHATTRMULTIEXITDISC: /* 7 */
- return SNMP_INTEGER(path->attr->med);
- case BGP4PATHATTRLOCALPREF: /* 8 */
- return SNMP_INTEGER(path->attr->local_pref);
- case BGP4PATHATTRATOMICAGGREGATE: /* 9 */
- return SNMP_INTEGER(1);
- case BGP4PATHATTRAGGREGATORAS: /* 10 */
- return SNMP_INTEGER(path->attr->aggregator_as);
- case BGP4PATHATTRAGGREGATORADDR: /* 11 */
- return SNMP_IPADDRESS(path->attr->aggregator_addr);
- case BGP4PATHATTRCALCLOCALPREF: /* 12 */
- return SNMP_INTEGER(-1);
- case BGP4PATHATTRBEST: /* 13 */
-#define BGP4_PathAttrBest_false 1
-#define BGP4_PathAttrBest_true 2
- if (CHECK_FLAG(path->flags, BGP_PATH_SELECTED))
- return SNMP_INTEGER(BGP4_PathAttrBest_true);
- else
- return SNMP_INTEGER(BGP4_PathAttrBest_false);
- case BGP4PATHATTRUNKNOWN: /* 14 */
- *var_len = 0;
- return NULL;
- }
- return NULL;
-}
-
-/* BGP Traps. */
-static struct trap_object bgpTrapList[] = {{3, {3, 1, BGPPEERREMOTEADDR} },
- {3, {3, 1, BGPPEERLASTERROR} },
- {3, {3, 1, BGPPEERSTATE} } };
-
-static int bgpTrapEstablished(struct peer *peer)
-{
- int ret;
- struct in_addr addr;
- oid index[sizeof(oid) * IN_ADDR_SIZE];
-
- /* Check if this peer just went to Established */
- if ((peer->ostatus != OpenConfirm) || !(peer_established(peer)))
- return 0;
-
- ret = inet_aton(peer->host, &addr);
- if (ret == 0)
- return 0;
-
- oid_copy_in_addr(index, &addr);
-
- smux_trap(bgp_variables, array_size(bgp_variables), bgp_trap_oid,
- array_size(bgp_trap_oid), bgp_oid,
- sizeof(bgp_oid) / sizeof(oid), index, IN_ADDR_SIZE,
- bgpTrapList, array_size(bgpTrapList), BGPESTABLISHED);
- return 0;
-}
-
-static int bgpTrapBackwardTransition(struct peer *peer)
-{
- int ret;
- struct in_addr addr;
- oid index[sizeof(oid) * IN_ADDR_SIZE];
-
- ret = inet_aton(peer->host, &addr);
- if (ret == 0)
- return 0;
-
- oid_copy_in_addr(index, &addr);
-
- smux_trap(bgp_variables, array_size(bgp_variables), bgp_trap_oid,
- array_size(bgp_trap_oid), bgp_oid,
- sizeof(bgp_oid) / sizeof(oid), index, IN_ADDR_SIZE,
- bgpTrapList, array_size(bgpTrapList), BGPBACKWARDTRANSITION);
- return 0;
-}
-
static int bgp_snmp_init(struct thread_master *tm)
{
smux_init(tm);
- REGISTER_MIB("mibII/bgp", bgp_variables, variable, bgp_oid);
+ bgp_snmp_bgp4_init(tm);
+ bgp_snmp_bgp4v2_init(tm);
bgp_mpls_l3vpn_module_init();
return 0;
}
projects / mirror_frr.git / blobdiff