diff options
Diffstat (limited to 'proto/ospf/rt.c')
-rw-r--r-- | proto/ospf/rt.c | 227 |
1 files changed, 131 insertions, 96 deletions
diff --git a/proto/ospf/rt.c b/proto/ospf/rt.c index cdf8012a..aee0368a 100644 --- a/proto/ospf/rt.c +++ b/proto/ospf/rt.c @@ -21,15 +21,6 @@ static inline void reset_ri(ort *ort) bzero(&ort->n, sizeof(orta)); } -void -ospf_rt_initort(struct fib_node *fn) -{ - ort *ri = (ort *) fn; - reset_ri(ri); - ri->old_rta = NULL; - ri->fn.flags = 0; -} - static inline int nh_is_vlink(struct mpnh *nhs) { @@ -334,9 +325,9 @@ ort_merge_ext(struct ospf_proto *p, ort *o, const orta *new) static inline void -ri_install_net(struct ospf_proto *p, ip_addr prefix, int pxlen, const orta *new) +ri_install_net(struct ospf_proto *p, net_addr *net, const orta *new) { - ort *old = (ort *) fib_get(&p->rtf, &prefix, pxlen); + ort *old = fib_get(&p->rtf, net); int cmp = orta_compare(p, new, &old->n); if (cmp > 0) @@ -348,8 +339,8 @@ ri_install_net(struct ospf_proto *p, ip_addr prefix, int pxlen, const orta *new) static inline void ri_install_rt(struct ospf_area *oa, u32 rid, const orta *new) { - ip_addr addr = ipa_from_rid(rid); - ort *old = (ort *) fib_get(&oa->rtr, &addr, MAX_PREFIX_LENGTH); + net_addr_ip4 nrid = net_from_rid(rid); + ort *old = fib_get(&oa->rtr, (net_addr *) &nrid); int cmp = orta_compare(oa->po, new, &old->n); if (cmp > 0) @@ -359,17 +350,19 @@ ri_install_rt(struct ospf_area *oa, u32 rid, const orta *new) } static inline void -ri_install_asbr(struct ospf_proto *p, ip_addr *addr, const orta *new) +ri_install_asbr(struct ospf_proto *p, u32 rid, const orta *new) { - ort *old = (ort *) fib_get(&p->backbone->rtr, addr, MAX_PREFIX_LENGTH); + net_addr_ip4 nrid = net_from_rid(rid); + ort *old = fib_get(&p->backbone->rtr, (net_addr *) &nrid); + if (orta_compare_asbr(p, new, &old->n) > 0) ort_replace(old, new); } static inline void -ri_install_ext(struct ospf_proto *p, ip_addr prefix, int pxlen, const orta *new) +ri_install_ext(struct ospf_proto *p, net_addr *net, const orta *new) { - ort *old = (ort *) fib_get(&p->rtf, &prefix, pxlen); + ort *old = fib_get(&p->rtf, net); int cmp = orta_compare_ext(p, new, &old->n); if (cmp > 0) @@ -404,7 +397,7 @@ px_pos_to_ifa(struct ospf_area *oa, int pos) static void -add_network(struct ospf_area *oa, ip_addr px, int pxlen, int metric, struct top_hash_entry *en, int pos) +add_network(struct ospf_area *oa, net_addr *net, int metric, struct top_hash_entry *en, int pos) { struct ospf_proto *p = oa->po; @@ -419,7 +412,7 @@ add_network(struct ospf_area *oa, ip_addr px, int pxlen, int metric, struct top_ .nhs = en->nhs }; - if (pxlen < 0 || pxlen > MAX_PREFIX_LENGTH) + if (net->pxlen > MAX_PREFIX_LENGTH) { log(L_WARN "%s: Invalid prefix in LSA (Type: %04x, Id: %R, Rt: %R)", p->p.name, en->lsa_type, en->lsa.id, en->lsa.rt); @@ -441,7 +434,7 @@ add_network(struct ospf_area *oa, ip_addr px, int pxlen, int metric, struct top_ nf.nhs = ifa ? new_nexthop(p, IPA_NONE, ifa->iface, ifa->ecmp_weight) : NULL; } - ri_install_net(p, px, pxlen, &nf); + ri_install_net(p, net, &nf); } @@ -452,8 +445,7 @@ spfa_process_rt(struct ospf_proto *p, struct ospf_area *oa, struct top_hash_entr struct ospf_lsa_rt *rt = act->lsa_body; struct ospf_lsa_rt_walk rtl; struct top_hash_entry *tmp; - ip_addr prefix; - int pxlen, i; + int i; if (rt->options & OPT_RT_V) oa->trcap = 1; @@ -503,9 +495,10 @@ spfa_process_rt(struct ospf_proto *p, struct ospf_area *oa, struct top_hash_entr * the same result by handing them here because add_network() * will keep the best (not the first) found route. */ - prefix = ipa_from_u32(rtl.id & rtl.data); - pxlen = u32_masklen(rtl.data); - add_network(oa, prefix, pxlen, act->dist + rtl.metric, act, i); + net_addr_ip4 net = + NET_ADDR_IP4(ip4_from_u32(rtl.id & rtl.data), u32_masklen(rtl.data)); + + add_network(oa, (net_addr *) &net, act->dist + rtl.metric, act, i); break; case LSART_NET: @@ -527,14 +520,14 @@ spfa_process_net(struct ospf_proto *p, struct ospf_area *oa, struct top_hash_ent { struct ospf_lsa_net *ln = act->lsa_body; struct top_hash_entry *tmp; - ip_addr prefix; - int pxlen, i, cnt; + int i, cnt; if (ospf_is_v2(p)) { - prefix = ipa_from_u32(act->lsa.id & ln->optx); - pxlen = u32_masklen(ln->optx); - add_network(oa, prefix, pxlen, act->dist, act, -1); + net_addr_ip4 net = + NET_ADDR_IP4(ip4_from_u32(act->lsa.id & ln->optx), u32_masklen(ln->optx)); + + add_network(oa, (net_addr *) &net, act->dist, act, -1); } cnt = lsa_net_count(&act->lsa); @@ -550,10 +543,6 @@ spfa_process_prefixes(struct ospf_proto *p, struct ospf_area *oa) { struct top_hash_entry *en, *src; struct ospf_lsa_prefix *px; - ip_addr pxa; - int pxlen; - u8 pxopts; - u16 metric; u32 *buf; int i; @@ -588,18 +577,22 @@ spfa_process_prefixes(struct ospf_proto *p, struct ospf_area *oa) buf = px->rest; for (i = 0; i < px->pxcount; i++) - { - buf = lsa_get_ipv6_prefix(buf, &pxa, &pxlen, &pxopts, &metric); + { + net_addr_ip6 net; + u8 pxopts; + u16 metric; - if (pxopts & OPT_PX_NU) - continue; + buf = ospf_get_ipv6_prefix(buf, (net_addr *) &net, &pxopts, &metric); - /* Store the first global address to use it later as a vlink endpoint */ - if ((pxopts & OPT_PX_LA) && ipa_zero(src->lb)) - src->lb = pxa; + if (pxopts & OPT_PX_NU) + continue; - add_network(oa, pxa, pxlen, src->dist + metric, src, i); - } + /* Store the first global address to use it later as a vlink endpoint */ + if ((pxopts & OPT_PX_LA) && ipa_zero(src->lb)) + src->lb = ipa_from_ip6(net.prefix); + + add_network(oa, (net_addr *) &net, src->dist + metric, src, i); + } } } @@ -742,13 +735,12 @@ ospf_rt_sum(struct ospf_area *oa) { struct ospf_proto *p = oa->po; struct top_hash_entry *en; - ip_addr ip, abrip; + net_addr net; u32 dst_rid, metric, options; ort *abr; - int pxlen = -1, type = -1; + int type; u8 pxopts; - OSPF_TRACE(D_EVENTS, "Starting routing table calculation for inter-area (area %R)", oa->areaid); WALK_SLIST(en, p->lsal) @@ -771,12 +763,12 @@ ospf_rt_sum(struct ospf_area *oa) if (en->lsa_type == LSA_T_SUM_NET) { - lsa_parse_sum_net(en, ospf_is_v2(p), &ip, &pxlen, &pxopts, &metric); + lsa_parse_sum_net(en, ospf_is_v2(p), &net, &pxopts, &metric); if (pxopts & OPT_PX_NU) continue; - if (pxlen < 0 || pxlen > MAX_PREFIX_LENGTH) + if (net.pxlen > MAX_PREFIX_LENGTH) { log(L_WARN "%s: Invalid prefix in LSA (Type: %04x, Id: %R, Rt: %R)", p->p.name, en->lsa_type, en->lsa.id, en->lsa.rt); @@ -803,8 +795,8 @@ ospf_rt_sum(struct ospf_area *oa) continue; /* 16.2. (4) */ - abrip = ipa_from_rid(en->lsa.rt); - abr = (ort *) fib_find(&oa->rtr, &abrip, MAX_PREFIX_LENGTH); + net_addr_ip4 nrid = net_from_rid(en->lsa.rt); + abr = fib_find(&oa->rtr, (net_addr *) &nrid); if (!abr || !abr->n.type) continue; @@ -828,7 +820,7 @@ ospf_rt_sum(struct ospf_area *oa) }; if (type == ORT_NET) - ri_install_net(p, ip, pxlen, &nf); + ri_install_net(p, &net, &nf); else ri_install_rt(oa, dst_rid, &nf); } @@ -842,11 +834,7 @@ ospf_rt_sum_tr(struct ospf_area *oa) struct ospf_area *bb = p->backbone; struct top_hash_entry *en; ort *re, *abr; - ip_addr ip, abrip; - u32 dst_rid, metric, options; - int pxlen; - u8 pxopts; - + u32 metric; if (!bb) return; @@ -869,26 +857,31 @@ ospf_rt_sum_tr(struct ospf_area *oa) if (en->lsa_type == LSA_T_SUM_NET) { - lsa_parse_sum_net(en, ospf_is_v2(p), &ip, &pxlen, &pxopts, &metric); + net_addr net; + u8 pxopts; + + lsa_parse_sum_net(en, ospf_is_v2(p), &net, &pxopts, &metric); if (pxopts & OPT_PX_NU) continue; - if (pxlen < 0 || pxlen > MAX_PREFIX_LENGTH) + if (net.pxlen > MAX_PREFIX_LENGTH) { log(L_WARN "%s: Invalid prefix in LSA (Type: %04x, Id: %R, Rt: %R)", p->p.name, en->lsa_type, en->lsa.id, en->lsa.rt); continue; } - re = fib_find(&p->rtf, &ip, pxlen); + re = fib_find(&p->rtf, &net); } else // en->lsa_type == LSA_T_SUM_RT { + u32 dst_rid, options; + lsa_parse_sum_rt(en, ospf_is_v2(p), &dst_rid, &metric, &options); - ip = ipa_from_rid(dst_rid); - re = fib_find(&bb->rtr, &ip, MAX_PREFIX_LENGTH); + net_addr_ip4 nrid = net_from_rid(dst_rid); + re = fib_find(&bb->rtr, (net_addr *) &nrid); } /* 16.3 (1b) */ @@ -906,8 +899,8 @@ ospf_rt_sum_tr(struct ospf_area *oa) continue; /* 16.3. (4) */ - abrip = ipa_from_rid(en->lsa.rt); - abr = fib_find(&oa->rtr, &abrip, MAX_PREFIX_LENGTH); + net_addr_ip4 nrid = net_from_rid(en->lsa.rt); + abr = fib_find(&oa->rtr, (net_addr *) &nrid); if (!abr || !abr->n.type) continue; @@ -998,7 +991,7 @@ decide_sum_lsa(struct ospf_area *oa, ort *nf, int dest) return 1; struct area_net *anet = (struct area_net *) - fib_route(&nf->n.oa->net_fib, nf->fn.prefix, nf->fn.pxlen); + fib_route(&nf->n.oa->net_fib, nf->fn.addr); /* Condensed area network found */ if (anet) @@ -1017,13 +1010,13 @@ check_sum_net_lsa(struct ospf_proto *p, ort *nf) if (nf->area_net) { /* It is a default route for stub areas, handled entirely in ospf_rt_abr() */ - if (nf->fn.pxlen == 0) + if (nf->fn.addr->pxlen == 0) return; /* Find that area network */ WALK_LIST(anet_oa, p->area_list) { - anet = (struct area_net *) fib_find(&anet_oa->net_fib, &nf->fn.prefix, nf->fn.pxlen); + anet = fib_find(&anet_oa->net_fib, nf->fn.addr); if (anet) break; } @@ -1042,10 +1035,12 @@ check_sum_net_lsa(struct ospf_proto *p, ort *nf) static inline void check_sum_rt_lsa(struct ospf_proto *p, ort *nf) { + u32 rid = rid_from_net(nf->fn.addr); + struct ospf_area *oa; WALK_LIST(oa, p->area_list) if (decide_sum_lsa(oa, nf, ORT_ROUTER)) - ospf_originate_sum_rt_lsa(p, oa, nf, nf->n.metric1, nf->n.options); + ospf_originate_sum_rt_lsa(p, oa, rid, nf->n.metric1, nf->n.options); } static inline int @@ -1058,7 +1053,7 @@ decide_nssa_lsa(struct ospf_proto *p, ort *nf, struct ospf_lsa_ext_local *rt) return 0; /* Condensed area network found */ - if (fib_route(&oa->enet_fib, nf->fn.prefix, nf->fn.pxlen)) + if (fib_route(&oa->enet_fib, nf->fn.addr)) return 0; if (!en || (en->lsa_type != LSA_T_NSSA)) @@ -1093,7 +1088,7 @@ check_nssa_lsa(struct ospf_proto *p, ort *nf) /* Find that area network */ WALK_LIST(oa, p->area_list) { - anet = (struct area_net *) fib_find(&oa->enet_fib, &nf->fn.prefix, nf->fn.pxlen); + anet = fib_find(&oa->enet_fib, nf->fn.addr); if (anet) break; } @@ -1164,6 +1159,7 @@ ospf_rt_abr1(struct ospf_proto *p) { struct area_net *anet; ort *nf, *default_nf; + net_addr default_net; /* RFC 2328 G.3 - incomplete resolution of virtual next hops - routers */ FIB_WALK(&p->backbone->rtr, nftmp) @@ -1189,7 +1185,7 @@ ospf_rt_abr1(struct ospf_proto *p) /* Compute condensed area networks */ if (nf->n.type == RTS_OSPF) { - anet = (struct area_net *) fib_route(&nf->n.oa->net_fib, nf->fn.prefix, nf->fn.pxlen); + anet = (struct area_net *) fib_route(&nf->n.oa->net_fib, nf->fn.addr); if (anet) { if (!anet->active) @@ -1197,7 +1193,7 @@ ospf_rt_abr1(struct ospf_proto *p) anet->active = 1; /* Get a RT entry and mark it to know that it is an area network */ - ort *nfi = (ort *) fib_get(&p->rtf, &anet->fn.prefix, anet->fn.pxlen); + ort *nfi = fib_get(&p->rtf, anet->fn.addr); nfi->area_net = 1; /* 16.2. (3) */ @@ -1212,8 +1208,13 @@ ospf_rt_abr1(struct ospf_proto *p) } FIB_WALK_END; - ip_addr addr = IPA_NONE; - default_nf = (ort *) fib_get(&p->rtf, &addr, 0); + + if (ospf_is_v2(p)) + net_fill_ip4(&default_net, IP4_NONE, 0); + else + net_fill_ip6(&default_net, IP6_NONE, 0); + + default_nf = fib_get(&p->rtf, &default_net); default_nf->area_net = 1; struct ospf_area *oa; @@ -1244,7 +1245,7 @@ ospf_rt_abr1(struct ospf_proto *p) { nf = (ort *) nftmp; if (nf->n.options & ORTA_ASBR) - ri_install_asbr(p, &nf->fn.prefix, &nf->n); + ri_install_asbr(p, rid_from_net(nf->fn.addr), &nf->n); } FIB_WALK_END; } @@ -1300,7 +1301,7 @@ ospf_rt_abr2(struct ospf_proto *p) if (!nf->n.type || !(nf->n.options & ORTA_ABR)) continue; - nf2 = fib_find(&bb->rtr, &nf->fn.prefix, MAX_PREFIX_LENGTH); + nf2 = fib_find(&bb->rtr, nf->fn.addr); if (!nf2 || !nf2->n.type || !(nf2->n.options & ORTA_ABR)) continue; @@ -1346,7 +1347,7 @@ ospf_rt_abr2(struct ospf_proto *p) if (rt_is_nssa(nf) && (nf->n.options & ORTA_PROP)) { struct area_net *anet = (struct area_net *) - fib_route(&nf->n.oa->enet_fib, nf->fn.prefix, nf->fn.pxlen); + fib_route(&nf->n.oa->enet_fib, nf->fn.addr); if (anet) { @@ -1355,7 +1356,7 @@ ospf_rt_abr2(struct ospf_proto *p) anet->active = 1; /* Get a RT entry and mark it to know that it is an area network */ - nf2 = (ort *) fib_get(&p->rtf, &anet->fn.prefix, anet->fn.pxlen); + nf2 = fib_get(&p->rtf, anet->fn.addr); nf2->area_net = 1; } @@ -1383,22 +1384,57 @@ ospf_rt_abr2(struct ospf_proto *p) /* Like fib_route(), but ignores dummy rt entries */ static void * -ospf_fib_route(struct fib *f, ip_addr a, int len) +ospf_fib_route_ip4(struct fib *f, ip4_addr a, int len) +{ + net_addr_ip4 net = NET_ADDR_IP4(a, len); + ort *nf; + +loop: + nf = fib_find(f, (net_addr *) &net); + if (nf && nf->n.type) + return nf; + + if (net.pxlen > 0) + { + net.pxlen--; + ip4_clrbit(&net.prefix, net.pxlen); + goto loop; + } + + return NULL; +} + +static void * +ospf_fib_route_ip6(struct fib *f, ip6_addr a, int len) { - ip_addr a0; + net_addr_ip6 net = NET_ADDR_IP6(a, len); ort *nf; - while (len >= 0) +loop: + nf = fib_find(f, (net_addr *) &net); + if (nf && nf->n.type) + return nf; + + if (net.pxlen > 0) { - a0 = ipa_and(a, ipa_mkmask(len)); - nf = fib_find(f, &a0, len); - if (nf && nf->n.type) - return nf; - len--; + net.pxlen--; + ip6_clrbit(&net.prefix, net.pxlen); + goto loop; } + return NULL; } +static void * +ospf_fib_route(struct fib *f, ip_addr a) +{ + if (ospf_is_v2(p)) + return ospf_fib_route_ip4(f, ipa_to_ip4(a), IP4_MAX_PREFIX_LENGTH); + else + return ospf_fib_route_ip6(f, ipa_to_ip6(a), IP6_MAX_PREFIX_LENGTH); +} + + /* RFC 2328 16.4. calculating external routes */ static void ospf_ext_spf(struct ospf_proto *p) @@ -1407,7 +1443,6 @@ ospf_ext_spf(struct ospf_proto *p) struct ospf_lsa_ext_local rt; ort *nf1, *nf2; orta nfa = {}; - ip_addr rtid; u32 br_metric; struct ospf_area *atmp; @@ -1437,7 +1472,7 @@ ospf_ext_spf(struct ospf_proto *p) if (rt.pxopts & OPT_PX_NU) continue; - if (rt.pxlen < 0 || rt.pxlen > MAX_PREFIX_LENGTH) + if (rt.net.pxlen > MAX_PREFIX_LENGTH) { log(L_WARN "%s: Invalid prefix in LSA (Type: %04x, Id: %R, Rt: %R)", p->p.name, en->lsa_type, en->lsa.id, en->lsa.rt); @@ -1457,8 +1492,8 @@ ospf_ext_spf(struct ospf_proto *p) if (!atmp) continue; /* Should not happen */ - rtid = ipa_from_rid(en->lsa.rt); - nf1 = fib_find(&atmp->rtr, &rtid, MAX_PREFIX_LENGTH); + net_addr_ip4 nrid = net_from_rid(en->lsa.rt); + nf1 = fib_find(&atmp->rtr, (net_addr *) &nrid); if (!nf1 || !nf1->n.type) continue; /* No AS boundary router found */ @@ -1468,7 +1503,7 @@ ospf_ext_spf(struct ospf_proto *p) /* 16.4. (3) NSSA - special rule for default routes */ /* ABR should use default only if P-bit is set and summaries are active */ - if ((en->lsa_type == LSA_T_NSSA) && ipa_zero(rt.ip) && (rt.pxlen == 0) && + if ((en->lsa_type == LSA_T_NSSA) && (rt.net.pxlen == 0) && (p->areano > 1) && !(rt.propagate && atmp->ac->summary)) continue; @@ -1480,7 +1515,7 @@ ospf_ext_spf(struct ospf_proto *p) } else { - nf2 = ospf_fib_route(&p->rtf, rt.fwaddr, MAX_PREFIX_LENGTH); + nf2 = ospf_fib_route(&p->rtf, rt.fwaddr); if (!nf2) continue; @@ -1542,7 +1577,7 @@ ospf_ext_spf(struct ospf_proto *p) nfa.oa = atmp; /* undefined in RFC 2328 */ nfa.en = en; /* store LSA for later (NSSA processing) */ - ri_install_ext(p, rt.ip, rt.pxlen, &nfa); + ri_install_ext(p, &rt.net, &nfa); } } @@ -1961,7 +1996,7 @@ again1: if (reload || ort_changed(nf, &a0)) { - net *ne = net_get(p->p.table, nf->fn.prefix, nf->fn.pxlen); + net *ne = net_get(p->p.table, nf->fn.addr); rta *a = rta_lookup(&a0); rte *e = rte_get_temp(a); @@ -1975,8 +2010,8 @@ again1: e->net = ne; e->pref = p->p.preference; - DBG("Mod rte type %d - %I/%d via %I on iface %s, met %d\n", - a0.source, nf->fn.prefix, nf->fn.pxlen, a0.gw, a0.iface ? a0.iface->name : "(none)", nf->n.metric1); + DBG("Mod rte type %d - %N via %I on iface %s, met %d\n", + a0.source, nf->fn.addr, a0.gw, a0.iface ? a0.iface->name : "(none)", nf->n.metric1); rte_update(&p->p, ne, e); } } @@ -1986,7 +2021,7 @@ again1: rta_free(nf->old_rta); nf->old_rta = NULL; - net *ne = net_get(p->p.table, nf->fn.prefix, nf->fn.pxlen); + net *ne = net_get(p->p.table, nf->fn.addr); rte_update(&p->p, ne, NULL); } |