Implements proper RID handling in OSPFv3.
This commit is contained in:
Ondrej Zajicek
parent
c15e569065
commit
9f0ba7b1c7
3 changed files with 195 additions and 106 deletions
198
proto/ospf/rt.c
198
proto/ospf/rt.c
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@ -225,10 +225,12 @@ process_prefixes(struct ospf_area *oa)
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continue;
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px = en->lsa_body;
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/* FIXME: for router LSA, we should find the first one */
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src = ospf_hash_find(po->gr, oa->areaid,
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((px->ref_type == LSA_T_RT) ? px->ref_rt : px->ref_id),
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px->ref_rt, px->ref_type);
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/* For router prefix-LSA, we would like to find the first router-LSA */
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if (px->ref_type == LSA_T_RT)
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src = ospf_hash_find_rt(po->gr, oa->areaid, px->ref_rt);
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else
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src = ospf_hash_find(po->gr, oa->areaid, px->ref_id, px->ref_rt, px->ref_type);
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if (!src)
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continue;
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@ -253,18 +255,107 @@ process_prefixes(struct ospf_area *oa)
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}
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#endif
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static void
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ospf_rt_spfa_rtlinks(struct ospf_area *oa, struct top_hash_entry *act, struct top_hash_entry *en)
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{
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struct proto *p = &oa->po->proto;
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struct proto_ospf *po = oa->po;
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orta nf;
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u32 i;
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struct ospf_lsa_rt *rt = en->lsa_body;
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struct ospf_lsa_rt_link *rr = (struct ospf_lsa_rt_link *) (rt + 1);
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for (i = 0; i < lsa_rt_count(&en->lsa); i++)
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{
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struct ospf_lsa_rt_link *rtl = rr + i;
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struct top_hash_entry *tmp = NULL;
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DBG(" Working on link: %R (type: %u) ", rtl->id, rtl->type);
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switch (rtl->type)
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{
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#ifdef OSPFv2
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case LSART_STUB:
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/*
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* This violates rfc2328! But it is mostly harmless.
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*/
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DBG("\n");
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nf.type = RTS_OSPF;
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nf.options = 0;
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nf.metric1 = act->dist + rtl->metric;
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nf.metric2 = LSINFINITY;
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nf.tag = 0;
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nf.oa = oa;
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nf.ar = act;
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nf.nh = act->nh;
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nf.ifa = act->nhi;
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if (act == oa->rt)
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{
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struct ospf_iface *iff;
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WALK_LIST(iff, po->iface_list) /* Try to find corresponding interface */
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{
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if (iff->iface && (iff->type != OSPF_IT_VLINK) &&
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(rtl->id == (ipa_to_u32(ipa_mkmask(iff->iface->addr->pxlen))
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& ipa_to_u32(iff->iface->addr->prefix)))) /* No VLINK and IP must match */
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{
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nf.ifa = iff;
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break;
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}
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}
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}
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if (!nf.ifa)
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continue;
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ri_install(po, ipa_from_u32(rtl->id),
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ipa_mklen(ipa_from_u32(rtl->data)), ORT_NET, &nf, NULL);
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break;
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#endif
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case LSART_NET:
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#ifdef OSPFv2
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/* In OSPFv2, rtl->id is IP addres of DR, Router ID is not known */
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tmp = ospf_hash_find_net(po->gr, oa->areaid, rtl->id);
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#else /* OSPFv3 */
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tmp = ospf_hash_find(po->gr, oa->areaid, rtl->nif, rtl->id, LSA_T_NET);
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#endif
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if (tmp == NULL)
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DBG("Not found!\n");
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else
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DBG("Found. :-)\n");
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break;
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case LSART_VLNK:
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case LSART_PTP:
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tmp = ospf_hash_find_rt(po->gr, oa->areaid, rtl->id);
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DBG("PTP found.\n");
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break;
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default:
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log("Unknown link type in router lsa. (rid = %R)", act->lsa.id);
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break;
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}
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if (tmp)
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DBG("Going to add cand, Mydist: %u, Req: %u\n",
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tmp->dist, act->dist + rtl->metric);
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add_cand(&oa->cand, tmp, act, act->dist + rtl->metric, oa);
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}
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}
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static void
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ospf_rt_spfa(struct ospf_area *oa)
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{
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u32 i, *rts;
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struct ospf_lsa_rt *rt;
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struct ospf_lsa_rt_link *rtl, *rr;
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struct proto *p = &oa->po->proto;
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struct proto_ospf *po = oa->po;
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struct ospf_lsa_rt *rt;
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struct ospf_lsa_net *ln;
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orta nf;
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struct ospf_iface *iface;
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struct top_hash_entry *act, *tmp;
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u32 i, *rts;
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orta nf;
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node *n;
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if (oa->rt == NULL)
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@ -300,7 +391,6 @@ ospf_rt_spfa(struct ospf_area *oa)
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switch (act->lsa.type)
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{
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case LSA_T_RT:
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/* FIXME - in OSPFv3 we should process all RT LSAs from that router */
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rt = (struct ospf_lsa_rt *) act->lsa_body;
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if (rt->options & OPT_RT_V)
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oa->trcap = 1;
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@ -320,83 +410,14 @@ ospf_rt_spfa(struct ospf_area *oa)
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ri_install(po, ipa_from_rid(act->lsa.rt), MAX_PREFIX_LENGTH, ORT_ROUTER, &nf, NULL);
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}
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rr = (struct ospf_lsa_rt_link *) (rt + 1);
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for (i = 0; i < lsa_rt_count(&act->lsa); i++)
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{
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tmp = NULL;
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rtl = (rr + i);
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DBG(" Working on link: %R (type: %u) ", rtl->id, rtl->type);
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switch (rtl->type)
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{
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#ifdef OSPFv2
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case LSART_STUB:
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/*
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* This violates rfc2328! But it is mostly harmless.
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*/
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DBG("\n");
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nf.type = RTS_OSPF;
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nf.options = 0;
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nf.metric1 = act->dist + rtl->metric;
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nf.metric2 = LSINFINITY;
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nf.tag = 0;
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nf.oa = oa;
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nf.ar = act;
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nf.nh = act->nh;
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nf.ifa = act->nhi;
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if (act == oa->rt)
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{
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struct ospf_iface *iff;
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WALK_LIST(iff, po->iface_list) /* Try to find corresponding interface */
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{
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if (iff->iface && (iff->type != OSPF_IT_VLINK) &&
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(rtl->id == (ipa_to_u32(ipa_mkmask(iff->iface->addr->pxlen))
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& ipa_to_u32(iff->iface->addr->prefix)))) /* No VLINK and IP must match */
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{
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nf.ifa = iff;
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break;
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}
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}
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}
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if (!nf.ifa)
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continue;
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ri_install(po, ipa_from_u32(rtl->id),
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ipa_mklen(ipa_from_u32(rtl->data)), ORT_NET, &nf, NULL);
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break;
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#endif
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case LSART_NET:
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#ifdef OSPFv2
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/* In OSPFv2, rtl->id is IP addres of DR, router ID is not known */
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tmp = ospf_hash_find(po->gr, oa->areaid, rtl->id, 0, LSA_T_NET);
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ospf_rt_spfa_rtlinks(oa, act, act);
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#else /* OSPFv3 */
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tmp = ospf_hash_find(po->gr, oa->areaid, rtl->nif, rtl->id, LSA_T_NET);
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for (tmp = ospf_hash_find_rt_first(po->gr, act->domain, act->lsa.rt);
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tmp; tmp = ospf_hash_find_rt_next(tmp))
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ospf_rt_spfa_rtlinks(oa, act, tmp);
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#endif
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if (tmp == NULL)
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DBG("Not found!\n");
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else
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DBG("Found. :-)\n");
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break;
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case LSART_VLNK:
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case LSART_PTP:
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/* FIXME - in OSPFv3, find lowest LSA ID */
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tmp = ospf_hash_find(po->gr, oa->areaid, rtl->id, rtl->id, LSA_T_RT);
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DBG("PTP found.\n");
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break;
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default:
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log("Unknown link type in router lsa. (rid = %R)", act->lsa.id);
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break;
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}
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if (tmp)
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DBG("Going to add cand, Mydist: %u, Req: %u\n",
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tmp->dist, act->dist + rtl->metric);
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add_cand(&oa->cand, tmp, act, act->dist + rtl->metric, oa);
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}
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break;
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case LSA_T_NET:
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ln = act->lsa_body;
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@ -410,8 +431,7 @@ ospf_rt_spfa(struct ospf_area *oa)
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for (i = 0; i < lsa_net_count(&act->lsa); i++)
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{
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DBG(" Working on router %R ", rts[i]);
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/* FIXME - in OSPFv3, find any LSA ID */
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tmp = ospf_hash_find(po->gr, oa->areaid, rts[i], rts[i], LSA_T_RT);
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tmp = ospf_hash_find_rt(po->gr, oa->areaid, rts[i]);
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if (tmp != NULL)
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DBG("Found :-)\n");
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else
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@ -431,9 +451,8 @@ ospf_rt_spfa(struct ospf_area *oa)
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{
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if ((iface->type == OSPF_IT_VLINK) && (iface->voa == oa))
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{
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/* FIXME in OSPFv3, different LSAID */
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if ((tmp = ospf_hash_find(po->gr, oa->areaid, iface->vid, iface->vid, LSA_T_RT)) &&
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(!ipa_equal(tmp->lb, IPA_NONE)))
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if ((tmp = ospf_hash_find_rt(po->gr, oa->areaid, iface->vid)) &&
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(!ipa_equal(tmp->lb, IPA_NONE)))
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{
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if ((iface->state != OSPF_IS_PTP) || (iface->iface != tmp->nhi->iface) || (!ipa_equal(iface->vip, tmp->lb)))
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{
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@ -1187,9 +1206,8 @@ again1:
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{
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if ((ifa->type == OSPF_IT_VLINK) && ipa_equal(ifa->vip, nf->n.nh))
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{
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/* FIXME in OSPFv3, may be different LSA ID */
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if ((en = ospf_hash_find(po->gr, ifa->voa->areaid, ifa->vid, ifa->vid, LSA_T_RT))
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&& (!ipa_equal(en->nh, IPA_NONE)))
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if ((en = ospf_hash_find_rt(po->gr, ifa->voa->areaid, ifa->vid))
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&& (!ipa_equal(en->nh, IPA_NONE)))
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{
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a0.gw = en->nh;
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found = 1;
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@ -1303,15 +1303,19 @@ static inline unsigned
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ospf_top_hash(struct top_graph *f, u32 domain, u32 lsaid, u32 rtrid, u32 type)
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{
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/* In OSPFv2, we don't know Router ID when looking for network LSAs.
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dirty patch to make rt table calculation work. */
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In OSPFv3, we don't know LSA ID when looking for router LSAs.
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In both cases, there is (usually) just one (or small number)
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appropriate LSA, so we just clear unknown part of key. */
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return (ospf_top_hash_u32(lsaid) + type +
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return (
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#ifdef OSPFv2
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((type == LSA_T_NET) ? 0 : ospf_top_hash_u32(rtrid)) +
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ospf_top_hash_u32(lsaid) +
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#else /* OSPFv3 */
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ospf_top_hash_u32(rtrid) +
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((type == LSA_T_RT) ? 0 : ospf_top_hash_u32(lsaid)) +
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#endif
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domain) & f->hash_mask;
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type + domain) & f->hash_mask;
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/*
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return (ospf_top_hash_u32(lsaid) + ospf_top_hash_u32(rtrid) +
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@ -1423,27 +1427,81 @@ struct top_hash_entry *
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ospf_hash_find(struct top_graph *f, u32 domain, u32 lsa, u32 rtr, u32 type)
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{
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struct top_hash_entry *e;
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e = f->hash_table[ospf_top_hash(f, domain, lsa, rtr, type)];
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#ifdef OSPFv2
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/* dirty patch to make rt table calculation work. */
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if (type == LSA_T_NET)
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{
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while (e && (e->lsa.id != lsa || e->lsa.type != LSA_T_NET || e->domain != domain))
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e = e->next;
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return e;
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}
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#endif
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while (e && (e->lsa.id != lsa || e->lsa.type != type || e->lsa.rt != rtr || e->domain != domain))
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e = e->next;
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return e;
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}
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#ifdef OSPFv2
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/* In OSPFv2, sometimes we don't know Router ID when looking for network LSAs.
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There should be just one, so we find any match. */
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struct top_hash_entry *
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ospf_hash_find_net(struct top_graph *f, u32 domain, u32 lsa)
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{
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struct top_hash_entry *e;
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e = f->hash_table[ospf_top_hash(f, domain, lsa, 0, LSA_T_NET)];
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while (e && (e->lsa.id != lsa || e->lsa.type != LSA_T_NET || e->domain != domain))
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e = e->next;
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return e;
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}
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#endif
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#ifdef OSPFv3
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/* In OSPFv3, usually we don't know LSA ID when looking for router
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LSAs. We return matching LSA with smallest LSA ID. */
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struct top_hash_entry *
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ospf_hash_find_rt(struct top_graph *f, u32 domain, u32 rtr)
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{
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struct top_hash_entry *rv = NULL;
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struct top_hash_entry *e;
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e = f->hash_table[ospf_top_hash(f, domain, 0, rtr, LSA_T_RT)];
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while (e)
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{
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if (e->lsa.rt == rtr && e->lsa.type == LSA_T_RT && e->domain == domain)
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if (!rv || e->lsa.id < rv->lsa.id)
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rv = e;
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e = e->next;
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}
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return rv;
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}
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static inline struct top_hash_entry *
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find_matching_rt(struct top_hash_entry *e, u32 domain, u32 rtr)
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{
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while (e && (e->lsa.rt != rtr || e->lsa.type != LSA_T_RT || e->domain != domain))
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e = e->next;
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return e;
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}
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struct top_hash_entry *
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ospf_hash_find_rt_first(struct top_graph *f, u32 domain, u32 rtr)
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{
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struct top_hash_entry *e;
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e = f->hash_table[ospf_top_hash(f, domain, 0, rtr, LSA_T_RT)];
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return find_matching_rt(e, domain, rtr);
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}
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struct top_hash_entry *
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ospf_hash_find_rt_next(struct top_hash_entry *e)
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{
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return find_matching_rt(e->next, e->domain, e->lsa.rt);
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}
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#endif
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struct top_hash_entry *
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ospf_hash_get(struct top_graph *f, u32 domain, u32 lsa, u32 rtr, u32 type)
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{
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@ -72,7 +72,20 @@ void check_sum_lsa(struct proto_ospf *po, ort *nf, int);
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void originate_sum_lsa(struct ospf_area *oa, struct fib_node *fn, int type, int metric, u32 options);
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void flush_sum_lsa(struct ospf_area *oa, struct fib_node *fn, int type);
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#ifdef OSPFv2
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struct top_hash_entry * ospf_hash_find_net(struct top_graph *f, u32 domain, u32 lsa);
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static inline struct top_hash_entry *
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ospf_hash_find_rt(struct top_graph *f, u32 domain, u32 rtr)
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{
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return ospf_hash_find(f, domain, rtr, rtr, LSA_T_RT);
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}
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#else /* OSPFv3 */
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struct top_hash_entry * ospf_hash_find_rt(struct top_graph *f, u32 domain, u32 rtr);
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struct top_hash_entry * ospf_hash_find_rt_first(struct top_graph *f, u32 domain, u32 rtr);
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struct top_hash_entry * ospf_hash_find_rt_next(struct top_hash_entry *e);
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#endif
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#endif /* _BIRD_OSPF_TOPOLOGY_H_ */
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