/* * add_node * * Add the given prefix (passed in as a string) to the given table. */ static void add_node(struct bgp_table *table, const char *prefix_str) { struct prefix_ipv4 p; struct test_node_t *node; struct bgp_node *rn; assert(prefix_str); if (str2prefix_ipv4(prefix_str, &p) <= 0) assert(0); rn = bgp_node_get(table, (struct prefix *)&p); if (rn->info) { assert(0); return; } node = malloc(sizeof(struct test_node_t)); assert(node); node->prefix_str = strdup(prefix_str); assert(node->prefix_str); rn->info = node; }
void bgp_connected_add (struct connected *ifc) { struct prefix p; struct prefix *addr; struct interface *ifp; struct bgp_node *rn; struct bgp_connected_ref *bc; ifp = ifc->ifp; if (! ifp) return; if (if_is_loopback (ifp)) return; addr = ifc->address; if (addr->family == AF_INET) { PREFIX_COPY_IPV4(&p, CONNECTED_PREFIX(ifc)); apply_mask_ipv4 ((struct prefix_ipv4 *) &p); if (prefix_ipv4_any ((struct prefix_ipv4 *) &p)) return; bgp_address_add (addr); rn = bgp_node_get (bgp_connected_table[AFI_IP], (struct prefix *) &p); if (rn->info) { bc = rn->info; bc->refcnt++; } else { bc = XCALLOC (MTYPE_BGP_CONN, sizeof (struct bgp_connected_ref)); bc->refcnt = 1; rn->info = bc; } } #ifdef HAVE_IPV6 else if (addr->family == AF_INET6) { PREFIX_COPY_IPV6(&p, CONNECTED_PREFIX(ifc)); apply_mask_ipv6 ((struct prefix_ipv6 *) &p); if (IN6_IS_ADDR_UNSPECIFIED (&p.u.prefix6)) return; if (IN6_IS_ADDR_LINKLOCAL (&p.u.prefix6)) return; rn = bgp_node_get (bgp_connected_table[AFI_IP6], (struct prefix *) &p); if (rn->info) { bc = rn->info; bc->refcnt++; } else { bc = XCALLOC (MTYPE_BGP_CONN, sizeof (struct bgp_connected_ref)); bc->refcnt = 1; rn->info = bc; } } #endif /* HAVE_IPV6 */ }
/* Check specified next-hop is reachable or not. */ int bgp_nexthop_lookup (afi_t afi, struct peer *peer, struct bgp_info *ri, int *changed, int *metricchanged) { struct bgp_node *rn; struct prefix p; struct bgp_nexthop_cache *bnc; struct in_addr addr; /* If lookup is not enabled, return valid. */ if (zlookup->sock < 0) { if (ri->extra) ri->extra->igpmetric = 0; return 1; } #ifdef HAVE_IPV6 if (afi == AFI_IP6) return bgp_nexthop_lookup_ipv6 (peer, ri, changed, metricchanged); #endif /* HAVE_IPV6 */ addr = ri->attr->nexthop; memset (&p, 0, sizeof (struct prefix)); p.family = AF_INET; p.prefixlen = IPV4_MAX_BITLEN; p.u.prefix4 = addr; /* IBGP or ebgp-multihop */ rn = bgp_node_get (bgp_nexthop_cache_table[AFI_IP], &p); if (rn->info) { bnc = rn->info; bgp_unlock_node (rn); } else { if (NULL == (bnc = zlookup_query (addr))) bnc = bnc_new (); else { if (changed) { struct bgp_table *old; struct bgp_node *oldrn; if (bgp_nexthop_cache_table[AFI_IP] == cache1_table[AFI_IP]) old = cache2_table[AFI_IP]; else old = cache1_table[AFI_IP]; oldrn = bgp_node_lookup (old, &p); if (oldrn) { struct bgp_nexthop_cache *oldbnc = oldrn->info; bnc->changed = bgp_nexthop_cache_different (bnc, oldbnc); if (bnc->metric != oldbnc->metric) bnc->metricchanged = 1; bgp_unlock_node (oldrn); } } } rn->info = bnc; } if (changed) *changed = bnc->changed; if (metricchanged) *metricchanged = bnc->metricchanged; if (bnc->valid && bnc->metric) (bgp_info_extra_get(ri))->igpmetric = bnc->metric; else if (ri->extra) ri->extra->igpmetric = 0; return bnc->valid; }
/* Check specified next-hop is reachable or not. */ static int bgp_nexthop_lookup_ipv6 (struct peer *peer, struct bgp_info *ri, int *changed, int *metricchanged) { struct bgp_node *rn; struct prefix p; struct bgp_nexthop_cache *bnc; struct attr *attr; /* If lookup is not enabled, return valid. */ if (zlookup->sock < 0) { if (ri->extra) ri->extra->igpmetric = 0; return 1; } /* Only check IPv6 global address only nexthop. */ attr = ri->attr; if (attr->extra->mp_nexthop_len != 16 || IN6_IS_ADDR_LINKLOCAL (&attr->extra->mp_nexthop_global)) return 1; memset (&p, 0, sizeof (struct prefix)); p.family = AF_INET6; p.prefixlen = IPV6_MAX_BITLEN; p.u.prefix6 = attr->extra->mp_nexthop_global; /* IBGP or ebgp-multihop */ rn = bgp_node_get (bgp_nexthop_cache_table[AFI_IP6], &p); if (rn->info) { bnc = rn->info; bgp_unlock_node (rn); } else { if (NULL == (bnc = zlookup_query_ipv6 (&attr->extra->mp_nexthop_global))) bnc = bnc_new (); else { if (changed) { struct bgp_table *old; struct bgp_node *oldrn; if (bgp_nexthop_cache_table[AFI_IP6] == cache1_table[AFI_IP6]) old = cache2_table[AFI_IP6]; else old = cache1_table[AFI_IP6]; oldrn = bgp_node_lookup (old, &p); if (oldrn) { struct bgp_nexthop_cache *oldbnc = oldrn->info; bnc->changed = bgp_nexthop_cache_different (bnc, oldbnc); if (bnc->metric != oldbnc->metric) bnc->metricchanged = 1; bgp_unlock_node (oldrn); } } } rn->info = bnc; } if (changed) *changed = bnc->changed; if (metricchanged) *metricchanged = bnc->metricchanged; if (bnc->valid && bnc->metric) (bgp_info_extra_get (ri))->igpmetric = bnc->metric; else if (ri->extra) ri->extra->igpmetric = 0; return bnc->valid; }