/* * BIRD -- OSPF * * (c) 1999--2004 Ondrej Filip * * Can be freely distributed and used under the terms of the GNU GPL. */ /** * DOC: Open Shortest Path First (OSPF) * * The OSPF protocol is quite complicated and its complex implemenation is * split to many files. In |ospf.c|, you will find mainly the interface * for communication with the core (e.g., reconfiguration hooks, shutdown * and initialisation and so on). In |packet.c|, you will find various * functions for sending and receiving generic OSPF packets. There are * also routines for authentication and checksumming. File |iface.c| contains * the interface state machine and functions for allocation and deallocation of OSPF's * interface data structures. Source |neighbor.c| includes the neighbor state * machine and functions for election of Designated Router and Backup * Designated router. In |hello.c|, there are routines for sending * and receiving of hello packets as well as functions for maintaining * wait times and the inactivity timer. Files |lsreq.c|, |lsack.c|, |dbdes.c| * contain functions for sending and receiving of link-state requests, * link-state acknowledgements and database descriptions respectively. * In |lsupd.c|, there are functions for sending and receiving * of link-state updates and also the flooding algorithm. Source |topology.c| is * a place where routines for searching LSAs in the link-state database, * adding and deleting them reside, there also are functions for originating * of various types of LSAs (router LSA, net LSA, external LSA). File |rt.c| * contains routines for calculating the routing table. |lsalib.c| is a set * of various functions for working with the LSAs (endianity conversions, * calculation of checksum etc.). * * One instance of the protocol is able to hold LSA databases for * multiple OSPF areas, to exchange routing information between * multiple neighbors and to calculate the routing tables. The core * structure is &proto_ospf to which multiple &ospf_area and * &ospf_iface structures are connected. &ospf_area is also connected to * &top_hash_graph which is a dynamic hashing structure that * describes the link-state database. It allows fast search, addition * and deletion. Each LSA is kept in two pieces: header and body. Both of them are * kept in the endianity of the CPU. * * The heart beat of ospf is ospf_disp(). It is called at regular intervals * (&proto_ospf->tick). It is responsible for aging and flushing of LSAs in * the database, for routing table calculaction and it call area_disp() of every * ospf_area. * * The function area_disp() is * responsible for late originating of router LSA and network LSA * and for cleanup after routing table calculation process in * the area. * To every &ospf_iface, we connect one or more * &ospf_neighbor's -- a structure containing many timers and queues * for building adjacency and for exchange of routing messages. * * BIRD's OSPF implementation respects RFC2328 in every detail, but * some of internal algorithms do differ. The RFC recommends making a snapshot * of the link-state database when a new adjacency is forming and sending * the database description packets based on the information in this * snapshot. The database can be quite large in some networks, so * rather we walk through a &slist structure which allows us to * continue even if the actual LSA we were working with is deleted. New * LSAs are added at the tail of this &slist. * * We also don't keep a separate OSPF routing table, because the core * helps us by being able to recognize when a route is updated * to an identical one and it suppresses the update automatically. * Due to this, we can flush all the routes we've recalculated and * also those we've deleted to the core's routing table and the * core will take care of the rest. This simplifies the process * and conserves memory. */ #include #include "ospf.h" static void ospf_rt_notify(struct proto *p, net * n, rte * new, rte * old UNUSED, ea_list * attrs); static void ospf_ifa_notify(struct proto *p, unsigned flags, struct ifa *a); static int ospf_rte_better(struct rte *new, struct rte *old); static int ospf_rte_same(struct rte *new, struct rte *old); static void ospf_disp(timer *timer); static void ospf_area_initfib(struct fib_node *fn) { struct area_net *an = (struct area_net *) fn; an->hidden = 0; an->active = -1; /* Force to regenerate summary lsa */ /* ac->oldactive will be rewritten by ospf_rt_spf() */ } static void add_area_nets(struct ospf_area *oa, struct ospf_area_config *ac) { struct proto_ospf *po = oa->po; struct proto *p = &po->proto; struct area_net_config *anet; struct area_net *antmp; fib_init(&oa->net_fib, p->pool, sizeof(struct area_net), 16, ospf_area_initfib); WALK_LIST(anet, ac->net_list) { antmp = (struct area_net *) fib_get(&oa->net_fib, &anet->px.addr, anet->px.len); antmp->hidden = anet->hidden; } } static int ospf_start(struct proto *p) { struct proto_ospf *po = (struct proto_ospf *) p; struct ospf_config *c = (struct ospf_config *) (p->cf); struct ospf_area_config *ac; struct ospf_area *oa; po->rfc1583 = c->rfc1583; po->ebit = 0; po->tick = c->tick; po->disp_timer = tm_new(p->pool); po->disp_timer->data = po; po->disp_timer->randomize = 0; po->disp_timer->hook = ospf_disp; po->disp_timer->recurrent = po->tick; tm_start(po->disp_timer, 1); po->lsab_size = 256; po->lsab_used = 0; po->lsab = mb_alloc(p->pool, po->lsab_size); init_list(&(po->iface_list)); init_list(&(po->area_list)); fib_init(&po->rtf, p->pool, sizeof(ort), 16, ospf_rt_initort); po->areano = 0; po->gr = ospf_top_new(p->pool); po->cleanup = 1; s_init_list(&(po->lsal)); if (EMPTY_LIST(c->area_list)) { log(L_ERR "Cannot start, no OSPF areas configured!"); return PS_DOWN; } WALK_LIST(ac, c->area_list) { oa = mb_allocz(p->pool, sizeof(struct ospf_area)); add_tail(&po->area_list, NODE oa); po->areano++; oa->ac = ac; oa->stub = ac->stub; oa->areaid = ac->areaid; oa->rt = NULL; oa->po = po; add_area_nets(oa, ac); fib_init(&oa->rtr, p->pool, sizeof(ort), 16, ospf_rt_initort); if (oa->areaid == 0) { po->backbone = oa; if (oa->stub) log(L_ERR "Backbone cannot be stub. Ignoring!"); oa->stub = 0; } oa->opt.byte = 0; if(!oa->stub) oa->opt.bit.e = 1; } /* Add all virtual links as interfaces */ { struct ospf_iface_patt *ipatt; WALK_LIST(ac, c->area_list) { WALK_LIST(ipatt, ac->vlink_list) { if(!po->backbone) { oa = mb_allocz(p->pool, sizeof(struct ospf_area)); add_tail(&po->area_list, NODE oa); po->areano++; oa->stub = 0; oa->areaid = 0; oa->rt = NULL; oa->po = po; fib_init(&oa->net_fib, p->pool, sizeof(struct area_net), 16, ospf_area_initfib); fib_init(&oa->rtr, p->pool, sizeof(ort), 16, ospf_rt_initort); po->backbone = oa; oa->opt.byte = 0; oa->opt.bit.e = 1; } ospf_iface_new(po, NULL, ac, ipatt); } } } return PS_UP; } static void ospf_dump(struct proto *p) { struct ospf_iface *ifa; struct ospf_neighbor *n; struct proto_ospf *po = (struct proto_ospf *) p; OSPF_TRACE(D_EVENTS, "Area number: %d", po->areano); WALK_LIST(ifa, po->iface_list) { OSPF_TRACE(D_EVENTS, "Interface: %s", (ifa->iface ? ifa->iface->name : "(null)")); OSPF_TRACE(D_EVENTS, "state: %u", ifa->state); OSPF_TRACE(D_EVENTS, "DR: %R", ifa->drid); OSPF_TRACE(D_EVENTS, "BDR: %R", ifa->bdrid); WALK_LIST(n, ifa->neigh_list) { OSPF_TRACE(D_EVENTS, " neighbor %R in state %u", n->rid, n->state); } } OSPF_TRACE(D_EVENTS, "LSA graph dump start:"); ospf_top_dump(po->gr, p); OSPF_TRACE(D_EVENTS, "LSA graph dump finished"); neigh_dump_all(); } static struct proto * ospf_init(struct proto_config *c) { struct proto *p = proto_new(c, sizeof(struct proto_ospf)); p->import_control = ospf_import_control; p->make_tmp_attrs = ospf_make_tmp_attrs; p->store_tmp_attrs = ospf_store_tmp_attrs; p->accept_ra_types = RA_OPTIMAL; p->rt_notify = ospf_rt_notify; p->if_notify = ospf_iface_notify; p->ifa_notify = ospf_ifa_notify; p->rte_better = ospf_rte_better; p->rte_same = ospf_rte_same; return p; } /* If new is better return 1 */ static int ospf_rte_better(struct rte *new, struct rte *old) { if (new->u.ospf.metric1 == LSINFINITY) return 0; if(new->attrs->source < old->attrs->source) return 1; if(new->attrs->source > old->attrs->source) return 0; if(new->attrs->source == RTS_OSPF_EXT2) { if(new->u.ospf.metric2 < old->u.ospf.metric2) return 1; if(new->u.ospf.metric2 > old->u.ospf.metric2) return 0; } if (new->u.ospf.metric1 < old->u.ospf.metric1) return 1; return 0; /* Old is shorter or same */ } static int ospf_rte_same(struct rte *new, struct rte *old) { /* new->attrs == old->attrs always */ return new->u.ospf.metric1 == old->u.ospf.metric1 && new->u.ospf.metric2 == old->u.ospf.metric2 && new->u.ospf.tag == old->u.ospf.tag; } static ea_list * ospf_build_attrs(ea_list * next, struct linpool *pool, u32 m1, u32 m2, u32 tag) { struct ea_list *l = lp_alloc(pool, sizeof(struct ea_list) + 3 * sizeof(eattr)); l->next = next; l->flags = EALF_SORTED; l->count = 3; l->attrs[0].id = EA_OSPF_METRIC1; l->attrs[0].flags = 0; l->attrs[0].type = EAF_TYPE_INT | EAF_TEMP; l->attrs[0].u.data = m1; l->attrs[1].id = EA_OSPF_METRIC2; l->attrs[1].flags = 0; l->attrs[1].type = EAF_TYPE_INT | EAF_TEMP; l->attrs[1].u.data = m2; l->attrs[2].id = EA_OSPF_TAG; l->attrs[2].flags = 0; l->attrs[2].type = EAF_TYPE_INT | EAF_TEMP; l->attrs[2].u.data = tag; return l; } void schedule_net_lsa(struct ospf_iface *ifa) { ifa->orignet = 1; } void schedule_rt_lsa(struct ospf_area *oa) { struct proto *p = &oa->po->proto; OSPF_TRACE(D_EVENTS, "Scheduling RT lsa origination for area %R.", oa->areaid); oa->origrt = 1; } void schedule_rtcalc(struct proto_ospf *po) { struct proto *p = &po->proto; if (po->calcrt) return; OSPF_TRACE(D_EVENTS, "Scheduling RT calculation."); po->calcrt = 1; } /** * area_disp - invokes origination of * router LSA and routing table cleanup * @oa: ospf area * * It invokes aging and when @ospf_area->origrt is set to 1, start * function for origination of router LSA and network LSAs. */ void area_disp(struct ospf_area *oa) { struct proto_ospf *po = oa->po; struct ospf_iface *ifa; /* Now try to originage rt_lsa */ if (oa->origrt) originate_rt_lsa(oa); /* Now try to originate network LSA's */ WALK_LIST(ifa, po->iface_list) { if (ifa->orignet && (ifa->oa == oa)) originate_net_lsa(ifa); } } /** * ospf_disp - invokes routing table calctulation, aging and also area_disp() * @timer: timer usually called every @proto_ospf->tick second, @timer->data * point to @proto_ospf */ void ospf_disp(timer * timer) { struct proto_ospf *po = timer->data; struct ospf_area *oa; WALK_LIST(oa, po->area_list) area_disp(oa); /* Age LSA DB */ ospf_age(po); /* Calculate routing table */ if (po->calcrt) ospf_rt_spf (po); } /** * ospf_import_control - accept or reject new route from nest's routing table * @p: current instance of protocol * @new: the new route * @attrs: list of attributes * @pool: pool for allocation of attributes * * Its quite simple. It does not accept our own routes and leaves the decision on * import to the filters. */ int ospf_import_control(struct proto *p, rte ** new, ea_list ** attrs, struct linpool *pool) { rte *e = *new; if (p == e->attrs->proto) return -1; /* Reject our own routes */ *attrs = ospf_build_attrs(*attrs, pool, LSINFINITY, 10000, 0); return 0; /* Leave decision to the filters */ } struct ea_list * ospf_make_tmp_attrs(struct rte *rt, struct linpool *pool) { return ospf_build_attrs(NULL, pool, rt->u.ospf.metric1, rt->u.ospf.metric2, rt->u.ospf.tag); } void ospf_store_tmp_attrs(struct rte *rt, struct ea_list *attrs) { rt->u.ospf.metric1 = ea_get_int(attrs, EA_OSPF_METRIC1, LSINFINITY); rt->u.ospf.metric2 = ea_get_int(attrs, EA_OSPF_METRIC2, 10000); rt->u.ospf.tag = ea_get_int(attrs, EA_OSPF_TAG, 0); } /** * ospf_shutdown - Finish of OSPF instance * @p: current instance of protocol * * RFC does not define any action that should be taken before router * shutdown. To make my neighbors react as fast as possible, I send * them hello packet with empty neighbor list. They should start * their neighbor state machine with event %NEIGHBOR_1WAY. */ static int ospf_shutdown(struct proto *p) { struct proto_ospf *po = (struct proto_ospf *) p; struct ospf_iface *ifa; OSPF_TRACE(D_EVENTS, "Shutdown requested"); /* And send to all my neighbors 1WAY */ WALK_LIST(ifa, po->iface_list) ospf_iface_shutdown(ifa); return PS_DOWN; } static void ospf_rt_notify(struct proto *p, net * n, rte * new, rte * old UNUSED, ea_list * attrs) { struct proto_ospf *po = (struct proto_ospf *) p; /* Temporarily down write anything OSPF_TRACE(D_EVENTS, "Got route %I/%d %s", p->name, n->n.prefix, n->n.pxlen, new ? "up" : "down"); */ if (new) /* Got some new route */ { originate_ext_lsa(n, new, po, attrs); } else { u32 rtid = po->proto.cf->global->router_id; struct ospf_area *oa; struct top_hash_entry *en; u32 pr = ipa_to_u32(n->n.prefix); struct ospf_lsa_ext *ext; int i; int max = max_ext_lsa(n->n.pxlen); /* Flush old external LSA */ for (i = 0; i < max; i++, pr++) { if (en = ospf_hash_find(po->gr, 0, pr, rtid, LSA_T_EXT)) { ext = en->lsa_body; if (ipa_compare(ext->netmask, ipa_mkmask(n->n.pxlen)) == 0) { WALK_LIST(oa, po->area_list) { ospf_lsupd_flush_nlsa(en, oa); } } break; } } } } static void ospf_ifa_notify(struct proto *p, unsigned flags, struct ifa *a) { struct proto_ospf *po = (struct proto_ospf *) p; struct ospf_iface *ifa; if ((a->flags & IA_SECONDARY) || (a->flags & IA_UNNUMBERED)) return; WALK_LIST(ifa, po->iface_list) { if (ifa->iface == a->iface) { schedule_rt_lsa(ifa->oa); return; } } } static void ospf_get_status(struct proto *p, byte * buf) { struct proto_ospf *po = (struct proto_ospf *) p; if (p->proto_state == PS_DOWN) buf[0] = 0; else { struct ospf_iface *ifa; struct ospf_neighbor *n; int adj = 0; WALK_LIST(ifa, po->iface_list) WALK_LIST(n, ifa->neigh_list) if (n->state == NEIGHBOR_FULL) adj = 1; if (adj == 0) strcpy(buf, "Alone"); else strcpy(buf, "Running"); } } static void ospf_get_route_info(rte * rte, byte * buf, ea_list * attrs UNUSED) { char *type = ""; switch(rte->attrs->source) { case RTS_OSPF: type = "I"; break; case RTS_OSPF_IA: type = "IA"; break; case RTS_OSPF_EXT1: type = "E1"; break; case RTS_OSPF_EXT2: type = "E2"; break; } buf += bsprintf(buf, " %s", type); buf += bsprintf(buf, " (%d/%d", rte->pref, rte->u.ospf.metric1); if (rte->attrs->source == RTS_OSPF_EXT2) buf += bsprintf(buf, "/%d", rte->u.ospf.metric2); buf += bsprintf(buf, ")"); if ((rte->attrs->source == RTS_OSPF_EXT2 || rte->attrs->source == RTS_OSPF_EXT1) && rte->u.ospf.tag) { buf += bsprintf(buf, " [%x]", rte->u.ospf.tag); } } static int ospf_get_attr(eattr * a, byte * buf, int buflen UNUSED) { switch (a->id) { case EA_OSPF_METRIC1: bsprintf(buf, "metric1"); return GA_NAME; case EA_OSPF_METRIC2: bsprintf(buf, "metric2"); return GA_NAME; case EA_OSPF_TAG: bsprintf(buf, "tag: %08x", a->u.data); return GA_FULL; default: return GA_UNKNOWN; } } static int ospf_patt_compare(struct ospf_iface_patt *a, struct ospf_iface_patt *b) { return (a->type == b->type); } /** * ospf_reconfigure - reconfiguration hook * @p: current instance of protocol (with old configuration) * @c: new configuration requested by user * * This hook tries to be a little bit intelligent. Instance of OSPF * will survive change of many constants like hello interval, * password change, addition or deletion of some neighbor on * nonbroadcast network, cost of interface, etc. */ static int ospf_reconfigure(struct proto *p, struct proto_config *c) { struct ospf_config *old = (struct ospf_config *) (p->cf); struct ospf_config *new = (struct ospf_config *) c; struct ospf_area_config *oldac, *newac; struct proto_ospf *po = (struct proto_ospf *) p; struct ospf_iface_patt *oldip, *newip; struct ospf_iface *ifa; struct nbma_node *nb1, *nb2, *nbnx; struct ospf_area *oa = NULL; int found, olddead, newdead; struct area_net_config *anc; struct area_net *an; po->rfc1583 = new->rfc1583; schedule_rtcalc(po); po->tick = new->tick; po->disp_timer->recurrent = po->tick; tm_start(po->disp_timer, 1); oldac = HEAD(old->area_list); newac = HEAD(new->area_list); /* I should get it in the same order */ while (((NODE(oldac))->next != NULL) && ((NODE(newac))->next != NULL)) { if (oldac->areaid != newac->areaid) return 0; WALK_LIST(oa, po->area_list) if (oa->areaid == newac->areaid) break; if (!oa) return 0; oa->ac = newac; oa->stub = newac->stub; if (newac->stub && (oa->areaid == 0)) oa->stub = 0; /* Check stubnet_list */ struct ospf_stubnet_config *oldsn = HEAD(oldac->stubnet_list); struct ospf_stubnet_config *newsn = HEAD(newac->stubnet_list); while (((NODE(oldsn))->next != NULL) && ((NODE(newsn))->next != NULL)) { if (!ipa_equal(oldsn->px.addr, newsn->px.addr) || (oldsn->px.len != newsn->px.len) || (oldsn->hidden != newsn->hidden) || (oldsn->summary != newsn->summary) || (oldsn->cost != newsn->cost)) break; oldsn = (struct ospf_stubnet_config *)(NODE(oldsn))->next; newsn = (struct ospf_stubnet_config *)(NODE(newsn))->next; } /* If there is no change, both pointers should be NULL */ if (((NODE(oldsn))->next) != ((NODE(newsn))->next)) schedule_rt_lsa(oa); /* Change net_list */ FIB_WALK(&oa->net_fib, nf) /* First check if some networks are deleted */ { found = 0; WALK_LIST(anc, newac->net_list) { if (ipa_equal(anc->px.addr, nf->prefix) && (anc->px.len == nf->pxlen)) { found = 1; break; } if (!found) flush_sum_lsa(oa, nf, ORT_NET); /* And flush them */ } } FIB_WALK_END; WALK_LIST(anc, newac->net_list) /* Second add new networks */ { an = fib_get(&oa->net_fib, &anc->px.addr, anc->px.len); an->hidden = anc->hidden; } if (!iface_patts_equal(&oldac->patt_list, &newac->patt_list, (void *) ospf_patt_compare)) return 0; WALK_LIST(ifa, po->iface_list) { if (oldip = (struct ospf_iface_patt *) iface_patt_find(&oldac->patt_list, ifa->iface)) { /* Now reconfigure interface */ if (!(newip = (struct ospf_iface_patt *) iface_patt_find(&newac->patt_list, ifa->iface))) return 0; /* HELLO TIMER */ if (oldip->helloint != newip->helloint) { ifa->helloint = newip->helloint; ifa->hello_timer->recurrent = ifa->helloint; tm_start(ifa->hello_timer, ifa->helloint); OSPF_TRACE(D_EVENTS, "Changing hello interval on interface %s from %d to %d", ifa->iface->name, oldip->helloint, newip->helloint); } /* POLL TIMER */ if (oldip->pollint != newip->pollint) { ifa->pollint = newip->helloint; ifa->poll_timer->recurrent = ifa->pollint; tm_start(ifa->poll_timer, ifa->pollint); OSPF_TRACE(D_EVENTS, "Changing poll interval on interface %s from %d to %d", ifa->iface->name, oldip->pollint, newip->pollint); } /* COST */ if (oldip->cost != newip->cost) { ifa->cost = newip->cost; OSPF_TRACE(D_EVENTS, "Changing cost interface %s from %d to %d", ifa->iface->name, oldip->cost, newip->cost); schedule_rt_lsa(ifa->oa); } /* RX BUFF */ if (oldip->rxbuf != newip->rxbuf) { ifa->rxbuf = newip->rxbuf; OSPF_TRACE(D_EVENTS, "Changing rxbuf interface %s from %d to %d", ifa->iface->name, oldip->rxbuf, newip->rxbuf); ospf_iface_change_mtu(po, ifa); } /* strict nbma */ if ((oldip->strictnbma == 0) && (newip->strictnbma != 0)) { ifa->strictnbma = newip->strictnbma; OSPF_TRACE(D_EVENTS, "Interface %s is now strict NBMA.", ifa->iface->name); } if ((oldip->strictnbma != 0) && (newip->strictnbma == 0)) { ifa->strictnbma = newip->strictnbma; OSPF_TRACE(D_EVENTS, "Interface %s is no longer strict NBMA.", ifa->iface->name); } /* stub */ if ((oldip->stub == 0) && (newip->stub != 0)) { ifa->stub = newip->stub; OSPF_TRACE(D_EVENTS, "Interface %s is now stub.", ifa->iface->name); } if ((oldip->stub != 0) && (newip->stub == 0) && ((ifa->ioprob & OSPF_I_IP) == 0) && (((ifa->ioprob & OSPF_I_MC) == 0) || (ifa->type == OSPF_IT_NBMA))) { ifa->stub = newip->stub; OSPF_TRACE(D_EVENTS, "Interface %s is no longer stub.", ifa->iface->name); } /* AUTHENTICATION */ if (oldip->autype != newip->autype) { ifa->autype = newip->autype; OSPF_TRACE(D_EVENTS, "Changing authentication type on interface %s", ifa->iface->name); } /* Add *passwords */ ifa->passwords = newip->passwords; /* priority */ if (oldip->priority != newip->priority) { ifa->priority = newip->priority; OSPF_TRACE(D_EVENTS, "Changing priority on interface %s from %d to %d", ifa->iface->name, oldip->priority, newip->priority); } /* RXMT */ if (oldip->rxmtint != newip->rxmtint) { ifa->rxmtint = newip->rxmtint; OSPF_TRACE(D_EVENTS, "Changing retransmit interval on interface %s from %d to %d", ifa->iface->name, oldip->rxmtint, newip->rxmtint); } /* WAIT */ if (oldip->waitint != newip->waitint) { ifa->waitint = newip->waitint; if (ifa->wait_timer->expires != 0) tm_start(ifa->wait_timer, ifa->waitint); OSPF_TRACE(D_EVENTS, "Changing wait interval on interface %s from %d to %d", ifa->iface->name, oldip->waitint, newip->waitint); } /* INFTRANS */ if (oldip->inftransdelay != newip->inftransdelay) { ifa->inftransdelay = newip->inftransdelay; OSPF_TRACE(D_EVENTS, "Changing transmit delay on interface %s from %d to %d", ifa->iface->name, oldip->inftransdelay, newip->inftransdelay); } /* DEAD */ olddead = (oldip->dead == 0) ? oldip->deadc * oldip->helloint : oldip->dead; newdead = (newip->dead == 0) ? newip->deadc * newip->helloint : newip->dead; if (olddead != newdead) { ifa->dead = newdead; OSPF_TRACE(D_EVENTS, "Changing dead interval on interface %s from %d to %d", ifa->iface->name, olddead, newdead); } /* NBMA LIST */ /* First remove old */ WALK_LIST_DELSAFE(nb1, nbnx, ifa->nbma_list) { found = 0; WALK_LIST(nb2, newip->nbma_list) if (ipa_compare(nb1->ip, nb2->ip) == 0) { found = 1; if (nb1->eligible != nb2->eligible) OSPF_TRACE(D_EVENTS, "Changing neighbor eligibility %I on interface %s", nb1->ip, ifa->iface->name); break; } if (!found) { OSPF_TRACE(D_EVENTS, "Removing NBMA neighbor %I on interface %s", nb1->ip, ifa->iface->name); rem_node(NODE nb1); mb_free(nb1); } } /* And then add new */ WALK_LIST(nb2, newip->nbma_list) { found = 0; WALK_LIST(nb1, ifa->nbma_list) if (ipa_compare(nb1->ip, nb2->ip) == 0) { found = 1; break; } if (!found) { nb1 = mb_alloc(p->pool, sizeof(struct nbma_node)); nb1->ip = nb2->ip; nb1->eligible = nb2->eligible; add_tail(&ifa->nbma_list, NODE nb1); OSPF_TRACE(D_EVENTS, "Adding NBMA neighbor %I on interface %s", nb1->ip, ifa->iface->name); } } } } oldac = (struct ospf_area_config *)(NODE(oldac))->next; newac = (struct ospf_area_config *)(NODE(newac))->next; } if (((NODE(oldac))->next) != ((NODE(newac))->next)) return 0; /* One is not null */ return 1; /* Everything OK :-) */ } void ospf_sh_neigh(struct proto *p, char *iff) { struct ospf_iface *ifa = NULL, *f; struct ospf_neighbor *n; struct proto_ospf *po = (struct proto_ospf *) p; if (p->proto_state != PS_UP) { cli_msg(-1013, "%s: is not up", p->name); cli_msg(0, ""); return; } if (iff != NULL) { WALK_LIST(f, po->iface_list) { if (strcmp(iff, f->iface->name) == 0) { ifa = f; break; } } if (ifa == NULL) { cli_msg(0, ""); return; } cli_msg(-1013, "%s:", p->name); cli_msg(-1013, "%-12s\t%3s\t%-15s\t%-5s\t%-12s\t%-10s", "Router ID", "Pri", " State", "DTime", "Router IP", "Interface"); WALK_LIST(n, ifa->neigh_list) ospf_sh_neigh_info(n); cli_msg(0, ""); return; } cli_msg(-1013, "%s:", p->name); cli_msg(-1013, "%-12s\t%3s\t%-15s\t%-5s\t%-12s\t%-10s", "Router ID", "Pri", " State", "DTime", "Router IP", "Interface"); WALK_LIST(ifa, po->iface_list) WALK_LIST(n, ifa->neigh_list) ospf_sh_neigh_info(n); cli_msg(0, ""); } void ospf_sh(struct proto *p) { struct ospf_area *oa; struct proto_ospf *po = (struct proto_ospf *) p; struct ospf_iface *ifa; struct ospf_neighbor *n; int ifano, nno, adjno, firstfib; struct area_net *anet; if (p->proto_state != PS_UP) { cli_msg(-1014, "%s: is not up", p->name); cli_msg(0, ""); return; } cli_msg(-1014, "%s:", p->name); cli_msg(-1014, "RFC1583 compatibility: %s", (po->rfc1583 ? "enable" : "disabled")); cli_msg(-1014, "RT scheduler tick: %d", po->tick); cli_msg(-1014, "Number of areas: %u", po->areano); cli_msg(-1014, "Number of LSAs in DB:\t%u", po->gr->hash_entries); WALK_LIST(oa, po->area_list) { cli_msg(-1014, "\tArea: %R (%u) %s", oa->areaid, oa->areaid, oa->areaid == 0 ? "[BACKBONE]" : ""); ifano = 0; nno = 0; adjno = 0; WALK_LIST(ifa, po->iface_list) { if (oa == ifa->oa) { ifano++; WALK_LIST(n, ifa->neigh_list) { nno++; if (n->state == NEIGHBOR_FULL) adjno++; } } } cli_msg(-1014, "\t\tStub:\t%s", oa->stub ? "Yes" : "No"); cli_msg(-1014, "\t\tTransit:\t%s", oa->trcap ? "Yes" : "No"); cli_msg(-1014, "\t\tNumber of interfaces:\t%u", ifano); cli_msg(-1014, "\t\tNumber of neighbors:\t%u", nno); cli_msg(-1014, "\t\tNumber of adjacent neighbors:\t%u", adjno); firstfib = 1; FIB_WALK(&oa->net_fib, nftmp) { anet = (struct area_net *) nftmp; if(firstfib) { cli_msg(-1014, "\t\tArea networks:"); firstfib = 0; } cli_msg(-1014, "\t\t\t%1I/%u\t%s\t%s", anet->fn.prefix, anet->fn.pxlen, anet->hidden ? "Hidden" : "Advertise", anet->active ? "Active" : ""); } FIB_WALK_END; } cli_msg(0, ""); } void ospf_sh_iface(struct proto *p, char *iff) { struct proto_ospf *po = (struct proto_ospf *) p; struct ospf_iface *ifa = NULL, *f; if (p->proto_state != PS_UP) { cli_msg(-1015, "%s: is not up", p->name); cli_msg(0, ""); return; } if (iff != NULL) { WALK_LIST(f, po->iface_list) { if (strcmp(iff, f->iface->name) == 0) { ifa = f; break; } } if (ifa == NULL) { cli_msg(0, ""); return; } cli_msg(-1015, "%s:", p->name); ospf_iface_info(ifa); cli_msg(0, ""); return; } cli_msg(-1015, "%s:", p->name); WALK_LIST(ifa, po->iface_list) ospf_iface_info(ifa); cli_msg(0, ""); } /* First we want to separate network-LSAs and other LSAs (because network-LSAs * will be presented as network nodes and other LSAs together as router nodes) * Network-LSAs are sorted according to network prefix, other LSAs are sorted * according to originating router id (to get all LSA needed to represent one * router node together). Then, according to LSA type, ID and age. */ static int he_compare(const void *p1, const void *p2) { struct top_hash_entry * he1 = * (struct top_hash_entry **) p1; struct top_hash_entry * he2 = * (struct top_hash_entry **) p2; struct ospf_lsa_header *lsa1 = &(he1->lsa); struct ospf_lsa_header *lsa2 = &(he2->lsa); int nt1 = (lsa1->type == LSA_T_NET); int nt2 = (lsa2->type == LSA_T_NET); if (he1->oa->areaid != he2->oa->areaid) return he1->oa->areaid - he2->oa->areaid; if (nt1 != nt2) return nt1 - nt2; if (nt1) { // we are cheating for now if (lsa1->id != lsa2->id) return lsa1->id - lsa2->id; return lsa1->age - lsa2->age; } else { if (lsa1->rt != lsa2->rt) return lsa1->rt - lsa2->rt; if (lsa1->type != lsa2->type) return lsa1->type - lsa2->type; if (lsa1->id != lsa2->id) return lsa1->id - lsa2->id; return lsa1->age - lsa2->age; } } static inline void show_lsa_router(struct top_hash_entry *he) { struct ospf_lsa_header *lsa = &(he->lsa); struct ospf_lsa_rt *rt = he->lsa_body; struct ospf_lsa_rt_link *rr = (struct ospf_lsa_rt_link *) (rt + 1); u32 i; for (i = 0; i < rt->links; i++) if (rr[i].type == LSART_PTP) cli_msg(-1016, "\t\trouter %R metric %u ", rr[i].id, rr[i].metric); for (i = 0; i < rt->links; i++) if (rr[i].type == LSART_NET) { struct proto_ospf *po = he->oa->po; struct top_hash_entry *net_he = ospf_hash_find(po->gr, he->oa->areaid, rr[i].id, rr[i].id, LSA_T_NET); if (net_he) { struct ospf_lsa_header *net_lsa = &(net_he->lsa); struct ospf_lsa_net *net_ln = net_he->lsa_body; cli_msg(-1016, "\t\tnetwork %I/%d metric %u ", ipa_and(ipa_from_u32(net_lsa->id), net_ln->netmask), ipa_mklen(net_ln->netmask), rr[i].metric); } else cli_msg(-1016, "\t\tnetwork ??? metric %u ", rr[i].metric); } for (i = 0; i < rt->links; i++) if (rr[i].type == LSART_STUB) cli_msg(-1016, "\t\tstubnet %I/%d metric %u ", ipa_from_u32(rr[i].id), ipa_mklen(ipa_from_u32(rr[i].data)), rr[i].metric); for (i = 0; i < rt->links; i++) if (rr[i].type == LSART_VLNK) cli_msg(-1016, "\t\tvlink %I metric %u ", ipa_from_u32(rr[i].id), rr[i].metric); } static inline void show_lsa_network(struct top_hash_entry *he) { struct ospf_lsa_header *lsa = &(he->lsa); struct ospf_lsa_net *ln = he->lsa_body; u32 *rts = (u32 *) (ln + 1); u32 max = (lsa->length - sizeof(struct ospf_lsa_header) - sizeof(struct ospf_lsa_net)) / sizeof(u32); u32 i; cli_msg(-1016, ""); cli_msg(-1016, "\tnetwork %I/%d", ipa_and(ipa_from_u32(lsa->id), ln->netmask), ipa_mklen(ln->netmask)); cli_msg(-1016, "\t\tdr %R", lsa->rt); for (i = 0; i < max; i++) cli_msg(-1016, "\t\trouter %R", rts[i]); } static inline void show_lsa_sum_net(struct top_hash_entry *he) { struct ospf_lsa_header *lsa = &(he->lsa); struct ospf_lsa_sum *sm = he->lsa_body; cli_msg(-1016, "\t\txnetwork %I/%d", ipa_and(ipa_from_u32(lsa->id), sm->netmask), ipa_mklen(sm->netmask)); } static inline void show_lsa_sum_rt(struct top_hash_entry *he) { cli_msg(-1016, "\t\txrouter %R", he->lsa.id); } static inline void show_lsa_external(struct top_hash_entry *he) { struct ospf_lsa_header *lsa = &(he->lsa); struct ospf_lsa_ext *ext = he->lsa_body; struct ospf_lsa_ext_tos *et = (struct ospf_lsa_ext_tos *) (ext + 1); char str_via[STD_ADDRESS_P_LENGTH + 8] = ""; char str_tag[16] = ""; if (ipa_nonzero(et->fwaddr)) bsprintf(str_via, " via %I", et->fwaddr); if (et->tag) bsprintf(str_tag, " tag %08x", et->tag); cli_msg(-1016, "\t\texternal %I/%d metric%s %u%s%s", ipa_and(ipa_from_u32(lsa->id), ext->netmask), ipa_mklen(ext->netmask), et->etm.etos.ebit ? "2" : "", et->etm.metric & METRIC_MASK, str_via, str_tag); } void ospf_sh_state(struct proto *p, int verbose) { struct proto_ospf *po = (struct proto_ospf *) p; struct top_graph *f = po->gr; unsigned int i, j; u32 last_rt = 0xFFFFFFFF; u32 last_area = 0xFFFFFFFF; if (p->proto_state != PS_UP) { cli_msg(-1016, "%s: is not up", p->name); cli_msg(0, ""); return; } struct top_hash_entry *hea[f->hash_entries]; struct top_hash_entry *he; j = 0; for (i = 0; i < f->hash_size; i++) for (he = f->hash_table[i]; he != NULL; he = he->next) hea[j++] = he; if (j == f->hash_size) die("Fatal mismatch"); qsort(hea, j, sizeof(struct top_hash_entry *), he_compare); for (i = 0; i < j; i++) { if ((verbose == 0) && (hea[i]->lsa.type > LSA_T_NET)) continue; if (last_area != hea[i]->oa->areaid) { cli_msg(-1016, ""); cli_msg(-1016, "area %R", hea[i]->oa->areaid); last_area = hea[i]->oa->areaid; last_rt = 0xFFFFFFFF; } if ((hea[i]->lsa.rt != last_rt) && (hea[i]->lsa.type != LSA_T_NET)) { cli_msg(-1016, ""); cli_msg(-1016, (hea[i]->lsa.type != LSA_T_EXT) ? "\trouter %R" : "\txrouter %R", hea[i]->lsa.rt); last_rt = hea[i]->lsa.rt; } switch (hea[i]->lsa.type) { case LSA_T_RT: show_lsa_router(hea[i]); break; case LSA_T_NET: show_lsa_network(hea[i]); break; case LSA_T_SUM_NET: show_lsa_sum_net(hea[i]); break; case LSA_T_SUM_RT: show_lsa_sum_rt(hea[i]); break; case LSA_T_EXT: show_lsa_external(hea[i]); break; } } cli_msg(0, ""); } struct protocol proto_ospf = { name:"OSPF", template:"ospf%d", attr_class:EAP_OSPF, init:ospf_init, dump:ospf_dump, start:ospf_start, shutdown:ospf_shutdown, get_route_info:ospf_get_route_info, get_attr:ospf_get_attr, get_status:ospf_get_status, reconfigure:ospf_reconfigure };