/* * BIRD -- OSPF * * (c) 1999--2005 Ondrej Filip <feela@network.cz> * * Can be freely distributed and used under the terms of the GNU GPL. */ #include "ospf.h" char *ospf_is[] = { "down", "loop", "waiting", "ptp", "drother", "backup", "dr" }; char *ospf_ism[] = { "interface up", "wait timer fired", "backup seen", "neighbor change", "loop indicated", "unloop indicated", "interface down" }; char *ospf_it[] = { "broadcast", "nbma", "ptp", "ptmp", "virtual link" }; static void poll_timer_hook(timer * timer) { ospf_hello_send(timer->data, OHS_POLL, NULL); } static void hello_timer_hook(timer * timer) { ospf_hello_send(timer->data, OHS_HELLO, NULL); } static void wait_timer_hook(timer * timer) { struct ospf_iface *ifa = (struct ospf_iface *) timer->data; struct proto *p = &ifa->oa->po->proto; OSPF_TRACE(D_EVENTS, "Wait timer fired on interface %s.", ifa->iface->name); ospf_iface_sm(ifa, ISM_WAITF); } static void ospf_iface_change_mtu(struct proto_ospf *po, struct ospf_iface *ifa); u32 rxbufsize(struct ospf_iface *ifa) { switch(ifa->rxbuf) { case OSPF_RXBUF_NORMAL: return (ifa->iface->mtu * 2); break; case OSPF_RXBUF_LARGE: return OSPF_MAX_PKT_SIZE; break; default: return ifa->rxbuf; break; } } struct nbma_node * find_nbma_node_in(list *nnl, ip_addr ip) { struct nbma_node *nn; WALK_LIST(nn, *nnl) if (ipa_equal(nn->ip, ip)) return nn; return NULL; } static int ospf_sk_open(struct ospf_iface *ifa) { sock *sk = sk_new(ifa->pool); sk->type = SK_IP; sk->dport = OSPF_PROTO; sk->saddr = IPA_NONE; sk->tos = IP_PREC_INTERNET_CONTROL; sk->rx_hook = ospf_rx_hook; sk->tx_hook = ospf_tx_hook; sk->err_hook = ospf_err_hook; sk->iface = ifa->iface; sk->rbsize = rxbufsize(ifa); sk->tbsize = rxbufsize(ifa); sk->data = (void *) ifa; sk->flags = SKF_LADDR_RX; if (sk_open(sk) != 0) goto err; #ifdef OSPFv3 /* 12 is an offset of the checksum in an OSPF packet */ if (sk_set_ipv6_checksum(sk, 12) < 0) goto err; #endif /* * For OSPFv2: When sending a packet, it is important to have a * proper source address. We expect that when we send one-hop * unicast packets, OS chooses a source address according to the * destination address (to be in the same prefix). We also expect * that when we send multicast packets, OS uses the source address * from sk->saddr registered to OS by sk_setup_multicast(). This * behavior is needed to implement multiple virtual ifaces (struct * ospf_iface) on one physical iface and is signalized by * CONFIG_MC_PROPER_SRC. * * If this behavior is not available (for example on BSD), we create * non-stub iface just for the primary IP address (see * ospf_iface_stubby()) and we expect OS to use primary IP address * as a source address for both unicast and multicast packets. * * FIXME: the primary IP address is currently just the * lexicographically smallest address on an interface, it should be * signalized by sysdep code which one is really the primary. */ sk->saddr = ifa->addr->ip; if ((ifa->type == OSPF_IT_BCAST) || (ifa->type == OSPF_IT_PTP)) { if (ifa->cf->real_bcast) { ifa->all_routers = ifa->addr->brd; if (sk_set_broadcast(sk, 1) < 0) goto err; } else { ifa->all_routers = AllSPFRouters; sk->ttl = 1; /* Hack, this will affect just multicast packets */ if (sk_setup_multicast(sk) < 0) goto err; if (sk_join_group(sk, ifa->all_routers) < 0) goto err; } } ifa->sk = sk; ifa->sk_dr = 0; return 1; err: rfree(sk); return 0; } static inline void ospf_sk_join_dr(struct ospf_iface *ifa) { if (ifa->sk_dr) return; sk_join_group(ifa->sk, AllDRouters); ifa->sk_dr = 1; } static inline void ospf_sk_leave_dr(struct ospf_iface *ifa) { if (!ifa->sk_dr) return; sk_leave_group(ifa->sk, AllDRouters); ifa->sk_dr = 0; } static void ospf_iface_down(struct ospf_iface *ifa) { struct ospf_neighbor *n, *nx; struct proto_ospf *po = ifa->oa->po; struct proto *p = &po->proto; struct ospf_iface *iff; if (ifa->type != OSPF_IT_VLINK) { #ifdef OSPFv2 OSPF_TRACE(D_EVENTS, "Removing interface %s (%I/%d) from area %R", ifa->iface->name, ifa->addr->prefix, ifa->addr->pxlen, ifa->oa->areaid); #else OSPF_TRACE(D_EVENTS, "Removing interface %s (IID %d) from area %R", ifa->iface->name, ifa->instance_id, ifa->oa->areaid); #endif /* First of all kill all the related vlinks */ WALK_LIST(iff, po->iface_list) { if ((iff->type == OSPF_IT_VLINK) && (iff->vifa == ifa)) ospf_iface_sm(iff, ISM_DOWN); } } WALK_LIST_DELSAFE(n, nx, ifa->neigh_list) { OSPF_TRACE(D_EVENTS, "Removing neighbor %I", n->ip); ospf_neigh_remove(n); } if (ifa->hello_timer) tm_stop(ifa->hello_timer); if (ifa->poll_timer) tm_stop(ifa->poll_timer); if (ifa->wait_timer) tm_stop(ifa->wait_timer); if (ifa->type == OSPF_IT_VLINK) { ifa->vifa = NULL; ifa->iface = NULL; ifa->addr = NULL; ifa->sk = NULL; ifa->cost = 0; ifa->vip = IPA_NONE; } ifa->rt_pos_beg = 0; ifa->rt_pos_end = 0; #ifdef OSPFv3 ifa->px_pos_beg = 0; ifa->px_pos_end = 0; #endif } void ospf_iface_remove(struct ospf_iface *ifa) { struct proto *p = &ifa->oa->po->proto; if (ifa->type == OSPF_IT_VLINK) OSPF_TRACE(D_EVENTS, "Removing vlink to %R via area %R", ifa->vid, ifa->voa->areaid); ospf_iface_sm(ifa, ISM_DOWN); rem_node(NODE ifa); rfree(ifa->pool); } void ospf_iface_shutdown(struct ospf_iface *ifa) { if (ifa->state > OSPF_IS_DOWN) ospf_hello_send(ifa, OHS_SHUTDOWN, NULL); } /** * ospf_iface_chstate - handle changes of interface state * @ifa: OSPF interface * @state: new state * * Many actions must be taken according to interface state changes. New network * LSAs must be originated, flushed, new multicast sockets to listen for messages for * %ALLDROUTERS have to be opened, etc. */ void ospf_iface_chstate(struct ospf_iface *ifa, u8 state) { struct proto_ospf *po = ifa->oa->po; struct proto *p = &po->proto; u8 oldstate = ifa->state; if (oldstate == state) return; ifa->state = state; if (ifa->type == OSPF_IT_VLINK) OSPF_TRACE(D_EVENTS, "Changing state of virtual link %R from %s to %s", ifa->vid, ospf_is[oldstate], ospf_is[state]); else OSPF_TRACE(D_EVENTS, "Changing state of iface %s from %s to %s", ifa->iface->name, ospf_is[oldstate], ospf_is[state]); if ((ifa->type == OSPF_IT_BCAST) && !ifa->cf->real_bcast && ifa->sk) { if ((state == OSPF_IS_BACKUP) || (state == OSPF_IS_DR)) ospf_sk_join_dr(ifa); else ospf_sk_leave_dr(ifa); } if ((oldstate == OSPF_IS_DR) && (ifa->net_lsa != NULL)) { ifa->net_lsa->lsa.age = LSA_MAXAGE; if (state >= OSPF_IS_WAITING) ospf_lsupd_flush_nlsa(po, ifa->net_lsa); if (can_flush_lsa(po)) flush_lsa(ifa->net_lsa, po); ifa->net_lsa = NULL; } if ((oldstate > OSPF_IS_LOOP) && (state <= OSPF_IS_LOOP)) ospf_iface_down(ifa); schedule_rt_lsa(ifa->oa); // FIXME flushling of link LSA } /** * ospf_iface_sm - OSPF interface state machine * @ifa: OSPF interface * @event: event comming to state machine * * This fully respects 9.3 of RFC 2328 except we have slightly * different handling of %DOWN and %LOOP state. We remove intefaces * that are %DOWN. %DOWN state is used when an interface is waiting * for a lock. %LOOP state is used when an interface does not have a * link. */ void ospf_iface_sm(struct ospf_iface *ifa, int event) { DBG("SM on %s %s. Event is '%s'\n", (ifa->type == OSPF_IT_VLINK) ? "vlink" : "iface", ifa->iface ? ifa->iface->name : "(none)" , ospf_ism[event]); switch (event) { case ISM_UP: if (ifa->state <= OSPF_IS_LOOP) { /* Now, nothing should be adjacent */ if ((ifa->type == OSPF_IT_PTP) || (ifa->type == OSPF_IT_PTMP) || (ifa->type == OSPF_IT_VLINK)) { ospf_iface_chstate(ifa, OSPF_IS_PTP); } else { if (ifa->priority == 0) ospf_iface_chstate(ifa, OSPF_IS_DROTHER); else { ospf_iface_chstate(ifa, OSPF_IS_WAITING); if (ifa->wait_timer) tm_start(ifa->wait_timer, ifa->waitint); } } if (ifa->hello_timer) tm_start(ifa->hello_timer, ifa->helloint); if (ifa->poll_timer) tm_start(ifa->poll_timer, ifa->pollint); ospf_hello_send(ifa, OHS_HELLO, NULL); schedule_link_lsa(ifa); } break; case ISM_BACKS: case ISM_WAITF: if (ifa->state == OSPF_IS_WAITING) { bdr_election(ifa); } break; case ISM_NEICH: if ((ifa->state == OSPF_IS_DROTHER) || (ifa->state == OSPF_IS_DR) || (ifa->state == OSPF_IS_BACKUP)) { bdr_election(ifa); schedule_rt_lsa(ifa->oa); } break; case ISM_LOOP: if ((ifa->state > OSPF_IS_LOOP) && ifa->check_link) ospf_iface_chstate(ifa, OSPF_IS_LOOP); break; case ISM_UNLOOP: /* Immediate go UP */ if (ifa->state == OSPF_IS_LOOP) ospf_iface_sm(ifa, ISM_UP); break; case ISM_DOWN: ospf_iface_chstate(ifa, OSPF_IS_DOWN); break; default: bug("OSPF_I_SM - Unknown event?"); break; } } static u8 ospf_iface_classify_int(struct iface *ifa, struct ifa *addr) { if (ipa_nonzero(addr->opposite)) return (ifa->flags & IF_MULTICAST) ? OSPF_IT_PTP : OSPF_IT_PTMP; if ((ifa->flags & (IF_MULTIACCESS | IF_MULTICAST)) == (IF_MULTIACCESS | IF_MULTICAST)) return OSPF_IT_BCAST; if ((ifa->flags & (IF_MULTIACCESS | IF_MULTICAST)) == IF_MULTIACCESS) return OSPF_IT_NBMA; return OSPF_IT_PTP; } static inline u8 ospf_iface_classify(u8 type, struct ifa *addr) { return (type != OSPF_IT_UNDEF) ? type : ospf_iface_classify_int(addr->iface, addr); } struct ospf_iface * ospf_iface_find(struct proto_ospf *p, struct iface *what) { struct ospf_iface *i; WALK_LIST(i, p->iface_list) if ((i->iface == what) && (i->type != OSPF_IT_VLINK)) return i; return NULL; } static void ospf_iface_add(struct object_lock *lock) { struct ospf_iface *ifa = lock->data; struct proto_ospf *po = ifa->oa->po; struct proto *p = &po->proto; /* Open socket if interface is not stub */ if (! ifa->stub && ! ospf_sk_open(ifa)) { log(L_ERR "%s: Socket open failed on interface %s, declaring as stub", p->name, ifa->iface->name); ifa->ioprob = OSPF_I_SK; ifa->stub = 1; } if (! ifa->stub) { ifa->hello_timer = tm_new_set(ifa->pool, hello_timer_hook, ifa, 0, ifa->helloint); if (ifa->type == OSPF_IT_NBMA) ifa->poll_timer = tm_new_set(ifa->pool, poll_timer_hook, ifa, 0, ifa->pollint); if ((ifa->type == OSPF_IT_BCAST) || (ifa->type == OSPF_IT_NBMA)) ifa->wait_timer = tm_new_set(ifa->pool, wait_timer_hook, ifa, 0, 0); } /* Do iface UP, unless there is no link and we use link detection */ ospf_iface_sm(ifa, (ifa->check_link && !(ifa->iface->flags & IF_LINK_UP)) ? ISM_LOOP : ISM_UP); } static inline void add_nbma_node(struct ospf_iface *ifa, struct nbma_node *src, int found) { struct nbma_node *n = mb_alloc(ifa->pool, sizeof(struct nbma_node)); add_tail(&ifa->nbma_list, NODE n); n->ip = src->ip; n->eligible = src->eligible; n->found = found; } static int ospf_iface_stubby(struct ospf_iface_patt *ip, struct ifa *addr) { if (! addr) return 0; /* a host/loopback address */ if (addr->flags & IA_HOST) return 1; /* * We cannot properly support multiple OSPF ifaces on real iface * with multiple prefixes, therefore we force OSPF ifaces with * non-primary IP prefixes to be stub. */ #if defined(OSPFv2) && !defined(CONFIG_MC_PROPER_SRC) if (! (addr->flags & IA_PRIMARY)) return 1; #endif return ip->stub; } void ospf_iface_new(struct ospf_area *oa, struct ifa *addr, struct ospf_iface_patt *ip) { struct proto *p = &oa->po->proto; struct iface *iface = addr ? addr->iface : NULL; struct pool *pool; struct ospf_iface *ifa; struct nbma_node *nb; struct object_lock *lock; if (ip->type == OSPF_IT_VLINK) OSPF_TRACE(D_EVENTS, "Adding vlink to %R via area %R", ip->vid, ip->voa); else { #ifdef OSPFv2 OSPF_TRACE(D_EVENTS, "Adding interface %s (%I/%d) to area %R", iface->name, addr->prefix, addr->pxlen, oa->areaid); #else OSPF_TRACE(D_EVENTS, "Adding interface %s (IID %d) to area %R", iface->name, ip->instance_id, oa->areaid); #endif } pool = rp_new(p->pool, "OSPF Interface"); ifa = mb_allocz(pool, sizeof(struct ospf_iface)); ifa->iface = iface; ifa->addr = addr; ifa->oa = oa; ifa->cf = ip; ifa->pool = pool; ifa->cost = ip->cost; ifa->rxmtint = ip->rxmtint; ifa->inftransdelay = ip->inftransdelay; ifa->priority = ip->priority; ifa->helloint = ip->helloint; ifa->pollint = ip->pollint; ifa->strictnbma = ip->strictnbma; ifa->waitint = ip->waitint; ifa->deadint = ip->deadint; ifa->stub = ospf_iface_stubby(ip, addr); ifa->ioprob = OSPF_I_OK; ifa->rxbuf = ip->rxbuf; ifa->check_link = ip->check_link; ifa->ecmp_weight = ip->ecmp_weight; #ifdef OSPFv2 ifa->autype = ip->autype; ifa->passwords = ip->passwords; #endif #ifdef OSPFv3 ifa->instance_id = ip->instance_id; #endif ifa->type = ospf_iface_classify(ip->type, addr); /* Check validity of interface type */ int old_type = ifa->type; u32 if_multi_flag = ip->real_bcast ? IF_BROADCAST : IF_MULTICAST; #ifdef OSPFv2 if ((ifa->type == OSPF_IT_BCAST) && (addr->flags & IA_PEER)) ifa->type = OSPF_IT_PTP; if ((ifa->type == OSPF_IT_NBMA) && (addr->flags & IA_PEER)) ifa->type = OSPF_IT_PTMP; #endif if ((ifa->type == OSPF_IT_BCAST) && !(iface->flags & if_multi_flag)) ifa->type = OSPF_IT_NBMA; if ((ifa->type == OSPF_IT_PTP) && !(iface->flags & if_multi_flag)) ifa->type = OSPF_IT_PTMP; if (ifa->type != old_type) log(L_WARN "%s: Cannot use interface %s as %s, forcing %s", p->name, iface->name, ospf_it[old_type], ospf_it[ifa->type]); /* Assign iface ID, for vlinks, this is ugly hack */ ifa->iface_id = (ifa->type != OSPF_IT_VLINK) ? iface->index : oa->po->last_vlink_id++; init_list(&ifa->neigh_list); init_list(&ifa->nbma_list); WALK_LIST(nb, ip->nbma_list) if (ipa_in_net(nb->ip, addr->prefix, addr->pxlen)) add_nbma_node(ifa, nb, 0); ifa->state = OSPF_IS_DOWN; add_tail(&oa->po->iface_list, NODE ifa); if (ifa->type == OSPF_IT_VLINK) { ifa->voa = ospf_find_area(oa->po, ip->voa); ifa->vid = ip->vid; ifa->hello_timer = tm_new_set(ifa->pool, hello_timer_hook, ifa, 0, ifa->helloint); return; /* Don't lock, don't add sockets */ } /* * In some cases we allow more ospf_ifaces on one physical iface. * In OSPFv2, if they use different IP address prefix. * In OSPFv3, if they use different instance_id. * Therefore, we store such info to lock->addr field. */ lock = olock_new(pool); #ifdef OSPFv2 lock->addr = ifa->addr->prefix; #else /* OSPFv3 */ lock->addr = _MI(0,0,0,ifa->instance_id); #endif lock->type = OBJLOCK_IP; lock->port = OSPF_PROTO; lock->iface = iface; lock->data = ifa; lock->hook = ospf_iface_add; olock_acquire(lock); } static void ospf_iface_change_timer(timer *tm, unsigned val) { if (!tm) return; tm->recurrent = val; if (tm->expires) tm_start(tm, val); } int ospf_iface_reconfigure(struct ospf_iface *ifa, struct ospf_iface_patt *new) { struct proto *p = &ifa->oa->po->proto; struct nbma_node *nb, *nbx; char *ifname = (ifa->type != OSPF_IT_VLINK) ? ifa->iface->name : "vlink"; /* Type could be changed in ospf_iface_new(), but if config values are same then also results are same */ int old_type = ospf_iface_classify(ifa->cf->type, ifa->addr); int new_type = ospf_iface_classify(new->type, ifa->addr); if (old_type != new_type) return 0; int new_stub = ospf_iface_stubby(new, ifa->addr); if (ifa->stub != new_stub) return 0; if (new->real_bcast != ifa->cf->real_bcast) return 0; ifa->cf = new; ifa->marked = 0; /* HELLO TIMER */ if (ifa->helloint != new->helloint) { OSPF_TRACE(D_EVENTS, "Changing hello interval on interface %s from %d to %d", ifname, ifa->helloint, new->helloint); ifa->helloint = new->helloint; ospf_iface_change_timer(ifa->hello_timer, ifa->helloint); } /* RXMT TIMER */ if (ifa->rxmtint != new->rxmtint) { OSPF_TRACE(D_EVENTS, "Changing retransmit interval on interface %s from %d to %d", ifname, ifa->rxmtint, new->rxmtint); ifa->rxmtint = new->rxmtint; } /* POLL TIMER */ if (ifa->pollint != new->pollint) { OSPF_TRACE(D_EVENTS, "Changing poll interval on interface %s from %d to %d", ifname, ifa->pollint, new->pollint); ifa->pollint = new->pollint; ospf_iface_change_timer(ifa->poll_timer, ifa->pollint); } /* WAIT TIMER */ if (ifa->waitint != new->waitint) { OSPF_TRACE(D_EVENTS, "Changing wait interval on interface %s from %d to %d", ifname, ifa->waitint, new->waitint); ifa->waitint = new->waitint; if (ifa->wait_timer && ifa->wait_timer->expires) tm_start(ifa->wait_timer, ifa->waitint); } /* DEAD TIMER */ if (ifa->deadint != new->deadint) { OSPF_TRACE(D_EVENTS, "Changing dead interval on interface %s from %d to %d", ifname, ifa->deadint, new->deadint); ifa->deadint = new->deadint; } /* INFTRANS */ if (ifa->inftransdelay != new->inftransdelay) { OSPF_TRACE(D_EVENTS, "Changing transmit delay on interface %s from %d to %d", ifname, ifa->inftransdelay, new->inftransdelay); ifa->inftransdelay = new->inftransdelay; } #ifdef OSPFv2 /* AUTHENTICATION */ if (ifa->autype != new->autype) { OSPF_TRACE(D_EVENTS, "Changing authentication type on interface %s", ifname); ifa->autype = new->autype; } /* Update passwords */ ifa->passwords = new->passwords; #endif /* Remaining options are just for proper interfaces */ if (ifa->type == OSPF_IT_VLINK) return 1; /* COST */ if (ifa->cost != new->cost) { OSPF_TRACE(D_EVENTS, "Changing cost on interface %s from %d to %d", ifname, ifa->cost, new->cost); ifa->cost = new->cost; } /* PRIORITY */ if (ifa->priority != new->priority) { OSPF_TRACE(D_EVENTS, "Changing priority on interface %s from %d to %d", ifname, ifa->priority, new->priority); ifa->priority = new->priority; } /* STRICT NBMA */ if (ifa->strictnbma != new->strictnbma) { OSPF_TRACE(D_EVENTS, "Changing NBMA strictness on interface %s", ifname); ifa->strictnbma = new->strictnbma; } /* NBMA LIST - remove or update old */ WALK_LIST_DELSAFE(nb, nbx, ifa->nbma_list) { struct nbma_node *nb2 = find_nbma_node_in(&new->nbma_list, nb->ip); if (nb2) { if (nb->eligible != nb2->eligible) { OSPF_TRACE(D_EVENTS, "Changing eligibility of neighbor %I on interface %s", nb->ip, ifname); nb->eligible = nb2->eligible; } } else { OSPF_TRACE(D_EVENTS, "Removing NBMA neighbor %I on interface %s", nb->ip, ifname); rem_node(NODE nb); mb_free(nb); } } /* NBMA LIST - add new */ WALK_LIST(nb, new->nbma_list) { if (!ipa_in_net(nb->ip, ifa->addr->prefix, ifa->addr->pxlen)) continue; if (! find_nbma_node(ifa, nb->ip)) { OSPF_TRACE(D_EVENTS, "Adding NBMA neighbor %I on interface %s", nb->ip, ifname); add_nbma_node(ifa, nb, !!find_neigh_by_ip(ifa, nb->ip)); } } /* RX BUFF */ if (ifa->rxbuf != new->rxbuf) { OSPF_TRACE(D_EVENTS, "Changing rxbuf interface %s from %d to %d", ifname, ifa->rxbuf, new->rxbuf); ifa->rxbuf = new->rxbuf; ospf_iface_change_mtu(ifa->oa->po, ifa); } /* LINK */ if (ifa->check_link != new->check_link) { OSPF_TRACE(D_EVENTS, "%s link check on interface %s", new->check_link ? "Enabling" : "Disabling", ifname); ifa->check_link = new->check_link; if (!(ifa->iface->flags & IF_LINK_UP)) ospf_iface_sm(ifa, ifa->check_link ? ISM_LOOP : ISM_UNLOOP); } /* ECMP weight */ if (ifa->ecmp_weight != new->ecmp_weight) { OSPF_TRACE(D_EVENTS, "Changing ECMP weight of interface %s from %d to %d", ifname, (int)ifa->ecmp_weight + 1, (int)new->ecmp_weight + 1); ifa->ecmp_weight = new->ecmp_weight; } /* instance_id is not updated - it is part of key */ return 1; } #ifdef OSPFv2 static inline struct ospf_iface_patt * ospf_iface_patt_find(struct ospf_area_config *ac, struct ifa *a) { return (struct ospf_iface_patt *) iface_patt_find(&ac->patt_list, a->iface, a); } void ospf_ifa_notify(struct proto *p, unsigned flags, struct ifa *a) { struct proto_ospf *po = (struct proto_ospf *) p; if (a->flags & IA_SECONDARY) return; if (a->scope <= SCOPE_LINK) return; /* In OSPFv2, we create OSPF iface for each address. */ if (flags & IF_CHANGE_UP) { int done = 0; struct ospf_area *oa; WALK_LIST(oa, po->area_list) { struct ospf_iface_patt *ip; if (ip = ospf_iface_patt_find(oa->ac, a)) { if (!done) ospf_iface_new(oa, a, ip); done++; } } if (done > 1) log(L_WARN "%s: Interface %s (IP %I) matches for multiple areas", p->name, a->iface->name, a->ip); } if (flags & IF_CHANGE_DOWN) { struct ospf_iface *ifa, *ifx; WALK_LIST_DELSAFE(ifa, ifx, po->iface_list) { if ((ifa->type != OSPF_IT_VLINK) && (ifa->addr == a)) ospf_iface_remove(ifa); /* See a note in ospf_iface_notify() */ } } } static struct ospf_iface * ospf_iface_find_by_key(struct ospf_area *oa, struct ifa *a) { struct ospf_iface *ifa; WALK_LIST(ifa, oa->po->iface_list) if ((ifa->addr == a) && (ifa->oa == oa) && (ifa->type != OSPF_IT_VLINK)) return ifa; return NULL; } void ospf_ifaces_reconfigure(struct ospf_area *oa, struct ospf_area_config *nac) { struct ospf_iface_patt *ip; struct iface *iface; struct ifa *a; WALK_LIST(iface, iface_list) { if (! (iface->flags & IF_UP)) continue; WALK_LIST(a, iface->addrs) { if (a->flags & IA_SECONDARY) continue; if (a->scope <= SCOPE_LINK) continue; if (ip = ospf_iface_patt_find(oa->ac, a)) { /* Main inner loop */ struct ospf_iface *ifa = ospf_iface_find_by_key(oa, a); if (ifa) { if (ospf_iface_reconfigure(ifa, ip)) continue; /* Hard restart */ ospf_iface_shutdown(ifa); ospf_iface_remove(ifa); } ospf_iface_new(oa, a, ip); } } } } #else /* OSPFv3 */ struct ospf_iface_patt * ospf_iface_patt_find(struct ospf_area_config *ac, struct iface *iface, int iid) { struct ospf_iface_patt *pt, *res = NULL; WALK_LIST(pt, ac->patt_list) if ((pt->instance_id >= iid) && (iface_patt_match(&pt->i, iface, NULL)) && (!res || (pt->instance_id < res->instance_id))) res = pt; return res; } void ospf_ifa_notify(struct proto *p, unsigned flags, struct ifa *a) { struct proto_ospf *po = (struct proto_ospf *) p; if (a->flags & IA_SECONDARY) return; if (a->scope < SCOPE_LINK) return; /* In OSPFv3, we create OSPF iface for link-local address, other addresses are used for link-LSA. */ if (a->scope == SCOPE_LINK) { if (flags & IF_CHANGE_UP) { int done0 = 0; struct ospf_area *oa; WALK_LIST(oa, po->area_list) { int iid = 0; struct ospf_iface_patt *ip; while (ip = ospf_iface_patt_find(oa->ac, a->iface, iid)) { ospf_iface_new(oa, a, ip); if (ip->instance_id == 0) done0++; iid = ip->instance_id + 1; } } if (done0 > 1) log(L_WARN "%s: Interface %s matches for multiple areas", p->name, a->iface->name); } if (flags & IF_CHANGE_DOWN) { struct ospf_iface *ifa, *ifx; WALK_LIST_DELSAFE(ifa, ifx, po->iface_list) { if ((ifa->type != OSPF_IT_VLINK) && (ifa->addr == a)) ospf_iface_remove(ifa); /* See a note in ospf_iface_notify() */ } } } else { struct ospf_iface *ifa; WALK_LIST(ifa, po->iface_list) { if (ifa->iface == a->iface) { schedule_rt_lsa(ifa->oa); /* Event 5 from RFC5340 4.4.3. */ schedule_link_lsa(ifa); return; } } } } static struct ospf_iface * ospf_iface_find_by_key(struct ospf_area *oa, struct ifa *a, int iid) { struct ospf_iface *ifa; WALK_LIST(ifa, oa->po->iface_list) if ((ifa->addr == a) && (ifa->oa == oa) && (ifa->instance_id == iid) && (ifa->type != OSPF_IT_VLINK)) return ifa; return NULL; } void ospf_ifaces_reconfigure(struct ospf_area *oa, struct ospf_area_config *nac) { struct ospf_iface_patt *ip; struct iface *iface; struct ifa *a; WALK_LIST(iface, iface_list) { if (! (iface->flags & IF_UP)) continue; WALK_LIST(a, iface->addrs) { if (a->flags & IA_SECONDARY) continue; if (a->scope != SCOPE_LINK) continue; int iid = 0; while (ip = ospf_iface_patt_find(nac, iface, iid)) { iid = ip->instance_id + 1; /* Main inner loop */ struct ospf_iface *ifa = ospf_iface_find_by_key(oa, a, ip->instance_id); if (ifa) { if (ospf_iface_reconfigure(ifa, ip)) continue; /* Hard restart */ ospf_iface_shutdown(ifa); ospf_iface_remove(ifa); } ospf_iface_new(oa, a, ip); } } } } #endif static void ospf_iface_change_mtu(struct proto_ospf *po, struct ospf_iface *ifa) { struct proto *p = &po->proto; struct ospf_packet *op; struct ospf_neighbor *n; OSPF_TRACE(D_EVENTS, "Changing MTU on interface %s", ifa->iface->name); if (ifa->sk) { ifa->sk->rbsize = rxbufsize(ifa); ifa->sk->tbsize = rxbufsize(ifa); sk_reallocate(ifa->sk); } WALK_LIST(n, ifa->neigh_list) { op = (struct ospf_packet *) n->ldbdes; n->ldbdes = mb_allocz(n->pool, ifa->iface->mtu); if (ntohs(op->length) <= ifa->iface->mtu) /* If the packet in old buffer is bigger, let it filled by zeros */ memcpy(n->ldbdes, op, ifa->iface->mtu); /* If the packet is old is same or smaller, copy it */ mb_free(op); } } static void ospf_iface_notify(struct proto_ospf *po, unsigned flags, struct ospf_iface *ifa) { if (flags & IF_CHANGE_DOWN) { ospf_iface_remove(ifa); return; } if (flags & IF_CHANGE_LINK) ospf_iface_sm(ifa, (ifa->iface->flags & IF_LINK_UP) ? ISM_UNLOOP : ISM_LOOP); if (flags & IF_CHANGE_MTU) ospf_iface_change_mtu(po, ifa); } void ospf_if_notify(struct proto *p, unsigned flags, struct iface *iface) { struct proto_ospf *po = (struct proto_ospf *) p; /* if (iface->flags & IF_IGNORE) return; */ /* Going up means that there are no such ifaces yet */ if (flags & IF_CHANGE_UP) return; struct ospf_iface *ifa, *ifx; WALK_LIST_DELSAFE(ifa, ifx, po->iface_list) if ((ifa->type != OSPF_IT_VLINK) && (ifa->iface == iface)) ospf_iface_notify(po, flags, ifa); /* We use here that even shutting down iface also shuts down the vlinks, but vlinks are not freed and stays in the iface_list even when down */ } void ospf_iface_info(struct ospf_iface *ifa) { char *more = ""; if (ifa->strictnbma && ((ifa->type == OSPF_IT_NBMA) || (ifa->type == OSPF_IT_PTMP))) more = " (strict)"; if (ifa->cf->real_bcast && ((ifa->type == OSPF_IT_BCAST) || (ifa->type == OSPF_IT_PTP))) more = " (real)"; if (ifa->type == OSPF_IT_VLINK) { cli_msg(-1015, "Virtual link to %R:", ifa->vid); cli_msg(-1015, "\tPeer IP: %I", ifa->vip); cli_msg(-1015, "\tTransit area: %R (%u)", ifa->voa->areaid, ifa->voa->areaid); cli_msg(-1015, "\tInterface: \"%s\"", (ifa->iface ? ifa->iface->name : "(none)")); } else { #ifdef OSPFv2 if (ifa->addr->flags & IA_PEER) cli_msg(-1015, "Interface %s (peer %I)", ifa->iface->name, ifa->addr->opposite); else cli_msg(-1015, "Interface %s (%I/%d)", ifa->iface->name, ifa->addr->prefix, ifa->addr->pxlen); #else /* OSPFv3 */ cli_msg(-1015, "Interface %s (IID %d)", ifa->iface->name, ifa->instance_id); #endif cli_msg(-1015, "\tType: %s%s", ospf_it[ifa->type], more); cli_msg(-1015, "\tArea: %R (%u)", ifa->oa->areaid, ifa->oa->areaid); } cli_msg(-1015, "\tState: %s%s", ospf_is[ifa->state], ifa->stub ? " (stub)" : ""); cli_msg(-1015, "\tPriority: %u", ifa->priority); cli_msg(-1015, "\tCost: %u", ifa->cost); if (ifa->oa->po->ecmp) cli_msg(-1015, "\tECMP weight: %d", ((int) ifa->ecmp_weight) + 1); cli_msg(-1015, "\tHello timer: %u", ifa->helloint); if (ifa->type == OSPF_IT_NBMA) { cli_msg(-1015, "\tPoll timer: %u", ifa->pollint); } cli_msg(-1015, "\tWait timer: %u", ifa->waitint); cli_msg(-1015, "\tDead timer: %u", ifa->deadint); cli_msg(-1015, "\tRetransmit timer: %u", ifa->rxmtint); if ((ifa->type == OSPF_IT_BCAST) || (ifa->type == OSPF_IT_NBMA)) { cli_msg(-1015, "\tDesigned router (ID): %R", ifa->drid); cli_msg(-1015, "\tDesigned router (IP): %I", ifa->drip); cli_msg(-1015, "\tBackup designed router (ID): %R", ifa->bdrid); cli_msg(-1015, "\tBackup designed router (IP): %I", ifa->bdrip); } }