/* 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 GNU Zebra; see the file COPYING. If not, write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ #include #ifdef HAVE_SNMP #ifdef HAVE_NETSNMP #include #endif #include #include #include #include "if.h" #include "log.h" #include "prefix.h" #include "command.h" #include "thread.h" #include "smux.h" #include "bgpd/bgpd.h" #include "bgpd/bgp_table.h" #include "bgpd/bgp_aspath.h" #include "bgpd/bgp_attr.h" #include "bgpd/bgp_route.h" #include "bgpd/bgp_fsm.h" /* BGP4-MIB described in RFC1657. */ #define BGP4MIB 1,3,6,1,2,1,15 /* Zebra enterprise BGP MIB. This variable is used for register OSPF MIB to SNMP agent under SMUX protocol. */ #define BGPDMIB 1,3,6,1,4,1,3317,1,2,2 /* 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 BGPPEERMINASORIGINATIONINTERVAL 22 #define BGPPEERMINROUTEADVERTISEMENTINTERVAL 23 #define BGPPEERINUPDATEELAPSEDTIME 24 /* 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. */ oid bgp_oid [] = { BGP4MIB }; oid bgpd_oid [] = { BGPDMIB }; /* IP address 0.0.0.0. */ static struct in_addr bgp_empty_addr = {0}; /* Hook functions. */ static u_char *bgpVersion (); static u_char *bgpLocalAs (); static u_char *bgpPeerTable (); static u_char *bgpRcvdPathAttrTable (); static u_char *bgpIdentifier (); static u_char *bgp4PathAttrTable (); /* static u_char *bgpTraps (); */ 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}}, {BGPPEERMINASORIGINATIONINTERVAL, INTEGER, RWRITE, bgpPeerTable, 3, {3, 1, 22}}, {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 u_char * bgpVersion (struct variable *v, oid name[], size_t *length, int exact, size_t *var_len, WriteMethod **write_method) { static u_char version; if (smux_header_generic(v, name, length, exact, var_len, write_method) == MATCH_FAILED) return NULL; /* Retrun BGP version. Zebra bgpd only support version 4. */ version = (0x80 >> (BGP_VERSION_4 - 1)); /* Return octet string length 1. */ *var_len = 1; return (u_char *)&version; } static u_char * 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); } struct peer * peer_lookup_addr_ipv4 (struct in_addr *src) { struct bgp *bgp; struct peer *peer; struct listnode *nn; struct in_addr addr; int ret; bgp = bgp_get_default (); if (! bgp) return NULL; LIST_LOOP (bgp->peer, peer, nn) { ret = inet_pton (AF_INET, peer->host, &addr); if (ret > 0) { if (IPV4_ADDR_SAME (&addr, src)) return peer; } } return NULL; } struct peer * bgp_peer_lookup_next (struct in_addr *src) { struct bgp *bgp; struct peer *peer; struct listnode *nn; struct in_addr *p; union sockunion su; int ret; memset (&su, 0, sizeof (union sockunion)); bgp = bgp_get_default (); if (! bgp) return NULL; LIST_LOOP (bgp->peer, peer, nn) { ret = inet_pton (AF_INET, peer->host, &su.sin.sin_addr); if (ret > 0) { p = &su.sin.sin_addr; if (ntohl (p->s_addr) > ntohl (src->s_addr)) { src->s_addr = p->s_addr; return peer; } } } return NULL; } struct peer * bgpPeerTable_lookup (struct variable *v, oid name[], size_t *length, struct in_addr *addr, int exact) { struct peer *peer = NULL; int len; if (exact) { /* Check the length. */ if (*length - v->namelen != sizeof (struct in_addr)) return NULL; oid2in_addr (name + v->namelen, IN_ADDR_SIZE, addr); peer = peer_lookup_addr_ipv4 (addr); return peer; } else { len = *length - v->namelen; if (len > 4) len = 4; oid2in_addr (name + v->namelen, len, addr); peer = bgp_peer_lookup_next (addr); if (peer == NULL) return NULL; oid_copy_addr (name + v->namelen, addr, sizeof (struct in_addr)); *length = sizeof (struct in_addr) + v->namelen; return peer; } return NULL; } /* BGP write methods. */ int write_bgpPeerTable (int action, u_char *var_val, u_char var_val_type, size_t var_val_len, u_char *statP, oid *name, size_t length, struct variable *v) { struct in_addr addr; struct peer *peer; long intval; int bigsize = SNMP_MAX_LEN; if (var_val_type != ASN_INTEGER) { return SNMP_ERR_WRONGTYPE; } if (var_val_len != sizeof (long)) { return SNMP_ERR_WRONGLENGTH; } if (! asn_parse_int(var_val, &bigsize, &var_val_type, &intval, sizeof(long))) { return SNMP_ERR_WRONGENCODING; } memset (&addr, 0, sizeof (struct in_addr)); peer = bgpPeerTable_lookup (v, name, &length, &addr, 1); if (! peer) return SNMP_ERR_NOSUCHNAME; printf ("val: %ld\n", intval); switch (v->magic) { 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: SET_FLAG (peer->config, PEER_CONFIG_CONNECT); peer->connect = intval; peer->v_connect = intval; break; case BGPPEERHOLDTIMECONFIGURED: SET_FLAG (peer->config, PEER_CONFIG_TIMER); peer->holdtime = intval; peer->v_holdtime = intval; break; case BGPPEERKEEPALIVECONFIGURED: SET_FLAG (peer->config, PEER_CONFIG_TIMER); peer->keepalive = intval; peer->v_keepalive = intval; break; case BGPPEERMINASORIGINATIONINTERVAL: peer->v_asorig = intval; break; case BGPPEERMINROUTEADVERTISEMENTINTERVAL: peer->v_routeadv = intval; break; } return SNMP_ERR_NOERROR; } u_char * 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; *write_method = 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); break; case BGPPEERSTATE: return SNMP_INTEGER (peer->status); break; 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); break; case BGPPEERNEGOTIATEDVERSION: return SNMP_INTEGER (peer->version); break; case BGPPEERLOCALADDR: if (peer->su_local) return SNMP_IPADDRESS (peer->su_local->sin.sin_addr); else return SNMP_IPADDRESS (bgp_empty_addr); break; case BGPPEERLOCALPORT: if (peer->su_local) return SNMP_INTEGER (ntohs (peer->su_local->sin.sin_port)); else return SNMP_INTEGER (0); break; case BGPPEERREMOTEADDR: if (peer->su_remote) return SNMP_IPADDRESS (peer->su_remote->sin.sin_addr); else return SNMP_IPADDRESS (bgp_empty_addr); break; case BGPPEERREMOTEPORT: if (peer->su_remote) return SNMP_INTEGER (ntohs (peer->su_remote->sin.sin_port)); else return SNMP_INTEGER (0); break; case BGPPEERREMOTEAS: return SNMP_INTEGER (peer->as); break; case BGPPEERINUPDATES: return SNMP_INTEGER (peer->update_in); break; case BGPPEEROUTUPDATES: return SNMP_INTEGER (peer->update_out); break; case BGPPEERINTOTALMESSAGES: return SNMP_INTEGER (peer->open_in + peer->update_in + peer->keepalive_in + peer->notify_in + peer->refresh_in + peer->dynamic_cap_in); break; case BGPPEEROUTTOTALMESSAGES: return SNMP_INTEGER (peer->open_out + peer->update_out + peer->keepalive_out + peer->notify_out + peer->refresh_out + peer->dynamic_cap_out); break; case BGPPEERLASTERROR: { static u_char lasterror[2]; lasterror[0] = peer->notify.code; lasterror[1] = peer->notify.subcode; *var_len = 2; return (u_char *)&lasterror; } break; case BGPPEERFSMESTABLISHEDTRANSITIONS: return SNMP_INTEGER (peer->established); break; case BGPPEERFSMESTABLISHEDTIME: if (peer->uptime == 0) return SNMP_INTEGER (0); else return SNMP_INTEGER (time (NULL) - peer->uptime); break; case BGPPEERCONNECTRETRYINTERVAL: *write_method = write_bgpPeerTable; return SNMP_INTEGER (peer->v_connect); break; case BGPPEERHOLDTIME: return SNMP_INTEGER (peer->v_holdtime); break; case BGPPEERKEEPALIVE: return SNMP_INTEGER (peer->v_keepalive); break; case BGPPEERHOLDTIMECONFIGURED: *write_method = write_bgpPeerTable; if (CHECK_FLAG (peer->config, PEER_CONFIG_TIMER)) return SNMP_INTEGER (peer->holdtime); else return SNMP_INTEGER (peer->v_holdtime); break; case BGPPEERKEEPALIVECONFIGURED: *write_method = write_bgpPeerTable; if (CHECK_FLAG (peer->config, PEER_CONFIG_TIMER)) return SNMP_INTEGER (peer->keepalive); else return SNMP_INTEGER (peer->v_keepalive); break; case BGPPEERMINASORIGINATIONINTERVAL: *write_method = write_bgpPeerTable; return SNMP_INTEGER (peer->v_asorig); break; case BGPPEERMINROUTEADVERTISEMENTINTERVAL: *write_method = write_bgpPeerTable; return SNMP_INTEGER (peer->v_routeadv); break; case BGPPEERINUPDATEELAPSEDTIME: if (peer->update_time == 0) return SNMP_INTEGER (0); else return SNMP_INTEGER (time (NULL) - peer->update_time); break; default: return NULL; break; } return NULL; } u_char * 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); } u_char * 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; } struct bgp_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_info *binfo; struct bgp_info *min; struct bgp_node *rn; union sockunion su; int len; struct in_addr paddr; #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. */ rn = bgp_node_lookup (bgp->rib[AFI_IP][SAFI_UNICAST], (struct prefix *) addr); if (rn) { bgp_unlock_node (rn); for (binfo = rn->info; binfo; binfo = binfo->next) if (sockunion_same (&binfo->peer->su, &su)) return binfo; } } else { offset = name + v->namelen; offsetlen = *length - v->namelen; len = offsetlen; if (offsetlen == 0) rn = 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; rn = 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 = 0; if (! rn) return NULL; do { min = NULL; for (binfo = rn->info; binfo; binfo = binfo->next) { if (binfo->peer->su.sin.sin_family == AF_INET && ntohl (paddr.s_addr) < ntohl (binfo->peer->su.sin.sin_addr.s_addr)) { if (min) { if (ntohl (binfo->peer->su.sin.sin_addr.s_addr) < ntohl (min->peer->su.sin.sin_addr.s_addr)) min = binfo; } else min = binfo; } } if (min) { *length = v->namelen + BGP_PATHATTR_ENTRY_OFFSET; offset = name + v->namelen; oid_copy_addr (offset, &rn->p.u.prefix4, IN_ADDR_SIZE); offset += IN_ADDR_SIZE; *offset = rn->p.prefixlen; offset++; oid_copy_addr (offset, &min->peer->su.sin.sin_addr, IN_ADDR_SIZE); addr->prefix = rn->p.u.prefix4; addr->prefixlen = rn->p.prefixlen; bgp_unlock_node (rn); return min; } paddr.s_addr = 0; } while ((rn = bgp_route_next (rn)) != NULL); } return NULL; } u_char * bgp4PathAttrTable (struct variable *v, oid name[], size_t *length, int exact, size_t *var_len, WriteMethod **write_method) { struct bgp *bgp; struct bgp_info *binfo; struct prefix_ipv4 addr; bgp = bgp_get_default (); if (! bgp) return NULL; memset (&addr, 0, sizeof (struct prefix_ipv4)); binfo = bgp4PathAttrLookup (v, name, length, bgp, &addr, exact); if (! binfo) return NULL; switch (v->magic) { case BGP4PATHATTRPEER: /* 1 */ return SNMP_IPADDRESS (binfo->peer->su.sin.sin_addr); break; case BGP4PATHATTRIPADDRPREFIXLEN: /* 2 */ return SNMP_INTEGER (addr.prefixlen); break; case BGP4PATHATTRIPADDRPREFIX: /* 3 */ return SNMP_IPADDRESS (addr.prefix); break; case BGP4PATHATTRORIGIN: /* 4 */ return SNMP_INTEGER (binfo->attr->origin); break; case BGP4PATHATTRASPATHSEGMENT: /* 5 */ *var_len = binfo->attr->aspath->length; return (u_char *) binfo->attr->aspath->data; break; case BGP4PATHATTRNEXTHOP: /* 6 */ return SNMP_IPADDRESS (binfo->attr->nexthop); break; case BGP4PATHATTRMULTIEXITDISC: /* 7 */ return SNMP_INTEGER (binfo->attr->med); break; case BGP4PATHATTRLOCALPREF: /* 8 */ return SNMP_INTEGER (binfo->attr->local_pref); break; case BGP4PATHATTRATOMICAGGREGATE: /* 9 */ return SNMP_INTEGER (1); break; case BGP4PATHATTRAGGREGATORAS: /* 10 */ return SNMP_INTEGER (binfo->attr->aggregator_as); break; case BGP4PATHATTRAGGREGATORADDR: /* 11 */ return SNMP_IPADDRESS (binfo->attr->aggregator_addr); break; case BGP4PATHATTRCALCLOCALPREF: /* 12 */ return SNMP_INTEGER (-1); break; case BGP4PATHATTRBEST: /* 13 */ #define BGP4_PathAttrBest_false 1 #define BGP4_PathAttrBest_true 2 if (CHECK_FLAG (binfo->flags, BGP_INFO_SELECTED)) return SNMP_INTEGER (BGP4_PathAttrBest_true); else return SNMP_INTEGER (BGP4_PathAttrBest_false); break; case BGP4PATHATTRUNKNOWN: /* 14 */ *var_len = 0; return NULL; break; } return NULL; } /* BGP Traps. */ struct trap_object bgpTrapList[] = { {bgpPeerTable, 3, {3, 1, BGPPEERREMOTEADDR}}, {bgpPeerTable, 3, {3, 1, BGPPEERLASTERROR}}, {bgpPeerTable, 3, {3, 1, BGPPEERSTATE}} }; void bgpTrapEstablished (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; oid_copy_addr (index, &addr, IN_ADDR_SIZE); smux_trap (bgp_oid, sizeof bgp_oid / sizeof (oid), index, IN_ADDR_SIZE, bgpTrapList, sizeof bgpTrapList / sizeof (struct trap_object), bm->start_time - time (NULL)); } void 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; oid_copy_addr (index, &addr, IN_ADDR_SIZE); smux_trap (bgp_oid, sizeof bgp_oid / sizeof (oid), index, IN_ADDR_SIZE, bgpTrapList, sizeof bgpTrapList / sizeof (struct trap_object), bm->start_time - time (NULL)); } void bgp_snmp_init () { smux_init (bgpd_oid, sizeof bgpd_oid / sizeof (oid)); REGISTER_MIB("mibII/bgp", bgp_variables, variable, bgp_oid); smux_start (); } #endif /* HAVE_SNMP */