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-rw-r--r--proto/ospf/topology.c227
1 files changed, 202 insertions, 25 deletions
diff --git a/proto/ospf/topology.c b/proto/ospf/topology.c
index f1e691c..215765e 100644
--- a/proto/ospf/topology.c
+++ b/proto/ospf/topology.c
@@ -1,8 +1,8 @@
/*
* BIRD -- OSPF Topological Database
*
- * (c) 1999 Martin Mares <mj@ucw.cz>
- * (c) 1999 - 2004 Ondrej Filip <feela@network.cz>
+ * (c) 1999 Martin Mares <mj@ucw.cz>
+ * (c) 1999--2004 Ondrej Filip <feela@network.cz>
*
* Can be freely distributed and used under the terms of the GNU GPL.
*/
@@ -25,7 +25,7 @@ originate_rt_lsa_body(struct ospf_area *oa, u16 * length)
{
struct proto_ospf *po = oa->po;
struct ospf_iface *ifa;
- int j = 0, k = 0, v = 0;
+ int j = 0, k = 0;
u16 i = 0;
struct ospf_lsa_rt *rt;
struct ospf_lsa_rt_link *ln;
@@ -39,8 +39,6 @@ originate_rt_lsa_body(struct ospf_area *oa, u16 * length)
if ((ifa->an == oa->areaid) && (ifa->state != OSPF_IS_DOWN))
{
i++;
- if (ifa->type == OSPF_IT_VLINK)
- v = 1;
}
}
rt = mb_allocz(po->proto.pool, sizeof(struct ospf_lsa_rt) +
@@ -49,7 +47,6 @@ originate_rt_lsa_body(struct ospf_area *oa, u16 * length)
rt->veb.bit.b = 1;
if ((po->ebit) && (!oa->stub))
rt->veb.bit.e = 1;
- rt->veb.bit.v = v;
ln = (struct ospf_lsa_rt_link *) (rt + 1);
WALK_LIST(ifa, po->iface_list)
@@ -83,7 +80,7 @@ originate_rt_lsa_body(struct ospf_area *oa, u16 * length)
}
else
{
- ln->id = ipa_to_u32(ifa->iface->addr->ip);
+ ln->data = ipa_to_u32(ifa->iface->addr->ip);
}
}
else
@@ -97,9 +94,7 @@ originate_rt_lsa_body(struct ospf_area *oa, u16 * length)
ln->data = 0xffffffff;
}
else
- {
i--; /* No link added */
- }
}
break;
case OSPF_IT_BCAST:
@@ -140,14 +135,21 @@ originate_rt_lsa_body(struct ospf_area *oa, u16 * length)
}
}
break;
- case OSPF_IT_VLINK: /* FIXME Add virtual links! */
- i--;
- break;
+ case OSPF_IT_VLINK:
+ neigh = (struct ospf_neighbor *) HEAD(ifa->neigh_list);
+ if ((!EMPTY_LIST(ifa->neigh_list)) && (neigh->state == NEIGHBOR_FULL) && (ifa->cost <= 0xffff))
+ {
+ ln->type = LSART_VLNK;
+ ln->id = neigh->rid;
+ ln->metric = ifa->cost;
+ ln->notos = 0;
+ rt->veb.bit.v = 1;
+ }
+ else
+ i--; /* No link added */
+ break;
}
}
- if (ifa->type == OSPF_IT_VLINK)
- v = 1;
- ln = (ln + 1);
}
rt->links = i;
*length = i * sizeof(struct ospf_lsa_rt_link) + sizeof(struct ospf_lsa_rt) +
@@ -305,6 +307,7 @@ originate_net_lsa(struct ospf_iface *ifa)
ifa->orignet = 0;
}
+
static void *
originate_ext_lsa_body(net * n, rte * e, struct proto_ospf *po,
struct ea_list *attrs)
@@ -325,15 +328,16 @@ originate_ext_lsa_body(net * n, rte * e, struct proto_ospf *po,
if (m1 != LSINFINITY)
{
- et->etos = 0;
- et->metric = m1;
+ et->etm.metric = m1;
+ et->etm.etos.tos = 0;
+ et->etm.etos.ebit = 0;
}
else
{
- et->etos = 0x80;
- et->metric = m2;
+ et->etm.metric = m2;
+ et->etm.etos.tos = 0;
+ et->etm.etos.ebit = 1;
}
- et->padding = 0;
et->tag = tag;
if (ipa_compare(e->attrs->gw, ipa_from_u32(0)) != 0)
{
@@ -371,6 +375,175 @@ max_ext_lsa(unsigned pxlen)
return i;
}
+void
+flush_sum_lsa(struct ospf_area *oa, struct fib_node *fn, int type)
+{
+ struct proto_ospf *po = oa->po;
+ struct proto *p = &po->proto;
+ struct top_hash_entry *en;
+ u32 rtid = po->proto.cf->global->router_id;
+ struct ospf_lsa_header lsa;
+ int max, i;
+ struct ospf_lsa_sum *sum = NULL;
+ union ospf_lsa_sum_tm *tm;
+
+ lsa.rt = rtid;
+ lsa.type = LSA_T_SUM_NET;
+ if (type == ORT_ROUTER)
+ lsa.type = LSA_T_SUM_RT;
+
+ max = max_ext_lsa(fn->pxlen);
+
+ for (i = 0; i < max; i++)
+ {
+ lsa.id = ipa_to_u32(fn->prefix) + i;
+ if ((en = ospf_hash_find_header(oa->gr, &lsa)) != NULL)
+ {
+ sum = en->lsa_body;
+ if (fn->pxlen == ipa_mklen(sum->netmask))
+ {
+ en->lsa.age = LSA_MAXAGE;
+ en->lsa.sn = LSA_MAXSEQNO;
+ OSPF_TRACE(D_EVENTS, "Flushing summary lsa.");
+ ospf_lsupd_flood(NULL, NULL, &en->lsa, NULL, oa, 1);
+ if (can_flush_lsa(oa)) flush_lsa(en, oa);
+ break;
+ }
+ }
+ }
+}
+
+
+
+
+void
+originate_sum_lsa(struct ospf_area *oa, struct fib_node *fn, int type, int metric)
+{
+ struct proto_ospf *po = oa->po;
+ struct proto *p = &po->proto;
+ struct top_hash_entry *en;
+ u32 rtid = po->proto.cf->global->router_id;
+ struct ospf_lsa_header lsa;
+ void *body = NULL;
+ int i, max, mlen = fn->pxlen, found = 0, free = -1;
+ struct ospf_lsa_sum *sum = NULL;
+ union ospf_lsa_sum_tm *tm;
+ lsa.type = LSA_T_SUM_NET;
+
+ if (type == ORT_ROUTER)
+ {
+ lsa.type = LSA_T_SUM_RT;
+ mlen = 0;
+ }
+
+ lsa.age = 0;
+ lsa.rt = rtid;
+ lsa.sn = LSA_INITSEQNO;
+ lsa.length = sizeof(struct ospf_lsa_sum) + sizeof(union ospf_lsa_sum_tm) +
+ sizeof(struct ospf_lsa_header);
+
+ max = max_ext_lsa(fn->pxlen);
+ for (i = 0; i < max; i++)
+ {
+ lsa.id = ipa_to_u32(fn->prefix) + i;
+ if ((en = ospf_hash_find_header(oa->gr, &lsa)) == NULL)
+ {
+ if (free < 0) free = i;
+ }
+ else
+ {
+ sum = en->lsa_body;
+ if (mlen == ipa_mklen(sum->netmask))
+ {
+ tm = (union ospf_lsa_sum_tm *) (sum + 1);
+ if (tm->metric == (unsigned)metric) return; /* No reason for origination */
+ lsa.sn = en->lsa.sn + 1;
+ free = en->lsa.id;
+ break;
+ }
+ }
+ }
+
+ if(free < 0)
+ {
+ log("%s: got more routes for one /%d network then %d, ignoring", p->name,
+ fn->pxlen, max);
+ return;
+ }
+ lsa.id = free;
+
+ sum = en->lsa_body;
+ tm = (union ospf_lsa_sum_tm *) (sum + 1);
+
+ OSPF_TRACE(D_EVENTS, "Originating summary (type %d) lsa for %I/%d.", lsa.type, fn->prefix,
+ fn->pxlen);
+
+ sum = mb_alloc(p->pool, sizeof(struct ospf_lsa_sum) + sizeof(union ospf_lsa_sum_tm));
+ sum->netmask = ipa_mkmask(mlen);
+ tm = (union ospf_lsa_sum_tm *) (sum + 1);
+ tm->metric = metric;
+ tm->tos.tos = 0;
+
+ lsasum_calculate(&lsa, body);
+ en = lsa_install_new(&lsa, body, oa);
+ ospf_lsupd_flood(NULL, NULL, &en->lsa, NULL, oa, 1);
+}
+
+void
+check_sum_lsa(struct proto_ospf *po, ort *nf, int dest)
+{
+ struct proto *p = &po->proto;
+ struct ospf_area *oa;
+ struct area_net *anet;
+ int flush, mlen;
+ ip_addr ip;
+
+ if (po->areano < 2) return;
+
+ if ((nf->n.type > RTS_OSPF_IA) && (nf->o.type > RTS_OSPF_IA)) return;
+
+ WALK_LIST(oa, po->area_list)
+ {
+ flush = 0;
+ if ((nf->n.metric1 >= LSINFINITY) || (nf->n.type > RTS_OSPF_IA))
+ flush = 1;
+ if ((dest == ORT_ROUTER) && (!(nf->n.capa & ORTA_ABR)))
+ flush = 1;
+ if (nf->n.oa->areaid == oa->areaid)
+ flush = 1;
+ /* FIXME: Test next hop - is it in actual area? */
+ if ((dest == ORT_ROUTER) && oa->stub)
+ flush = 1;
+ /* FIXME stub for networks? */
+
+ mlen = nf->fn.pxlen;
+ ip = ipa_and(nf->fn.prefix, ipa_mkmask(mlen));
+ if((!oa->trcap) && fib_route(&oa->net_fib, ip, mlen)) /* The route fits into some area */
+ flush = 1;
+
+ if(flush) /* FIXME Go on... */
+ {
+ flush_sum_lsa(oa, &nf->fn, dest);
+ continue;
+ }
+ originate_sum_lsa(oa, &nf->fn, dest, nf->n.metric1);
+ }
+}
+
+void
+check_sum_areas(struct proto_ospf *po)
+{
+ struct proto *p = &po->proto;
+ struct ospf_area *oa;
+ struct area_net *anet;
+
+ WALK_LIST(oa, po->area_list)
+ {
+ ; /* FIXME */
+ }
+}
+
+
/**
* originate_ext_lsa - new route received from nest and filters
* @n: network prefix and mask
@@ -397,8 +570,7 @@ originate_ext_lsa(net * n, rte * e, struct proto_ospf *po,
struct proto *p = &po->proto;
struct ospf_area *oa;
struct ospf_lsa_ext *ext1, *ext2;
- int i;
- int max;
+ int i, max;
OSPF_TRACE(D_EVENTS, "Originating Ext lsa for %I/%d.", n->n.prefix,
n->n.pxlen);
@@ -408,6 +580,7 @@ originate_ext_lsa(net * n, rte * e, struct proto_ospf *po,
lsa.type = LSA_T_EXT;
lsa.rt = rtid;
lsa.sn = LSA_INITSEQNO;
+
body = originate_ext_lsa_body(n, e, po, attrs);
lsa.length = sizeof(struct ospf_lsa_ext) + sizeof(struct ospf_lsa_ext_tos) +
sizeof(struct ospf_lsa_header);
@@ -440,9 +613,12 @@ originate_ext_lsa(net * n, rte * e, struct proto_ospf *po,
lsasum_calculate(&lsa, body);
WALK_LIST(oa, po->area_list)
{
- en = lsa_install_new(&lsa, body, oa);
- ospf_lsupd_flood(NULL, NULL, &en->lsa, NULL, oa, 1);
- body = originate_ext_lsa_body(n, e, po, attrs);
+ if (!oa->stub)
+ {
+ en = lsa_install_new(&lsa, body, oa);
+ ospf_lsupd_flood(NULL, NULL, &en->lsa, NULL, oa, 1);
+ body = originate_ext_lsa_body(n, e, po, attrs);
+ }
}
mb_free(body);
@@ -617,6 +793,7 @@ ospf_hash_get(struct top_graph *f, u32 lsa, u32 rtr, u32 type)
e->dist = LSINFINITY;
e->nhi = NULL;
e->nh = ipa_from_u32(0);
+ e->lb = ipa_from_u32(0);
e->lsa.id = lsa;
e->lsa.rt = rtr;
e->lsa.type = type;
generated by cgit v1.2.3 (git 2.25.1) at 2024-05-20 20:39:13 +0200