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Fixes a bug in LSA flooding.

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LSAs are sometimes prematurely removed from LS retransmission lists.
This commit is contained in:
Ondrej Zajicek 2010-05-07 15:54:27 +02:00
parent 54818e9beb
commit ee7408c2be
2 changed files with 18 additions and 27 deletions
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3
proto/ospf/lsack.c
View File

@ -183,9 +183,6 @@ ospf_lsack_receive(struct ospf_packet *ps_i, struct ospf_iface *ifa,
DBG("Deleting LS Id: %R RT: %R Type: %u from LS Retl for neighbor %R\n", DBG("Deleting LS Id: %R RT: %R Type: %u from LS Retl for neighbor %R\n",
lsa.id, lsa.rt, lsa.type, n->rid); lsa.id, lsa.rt, lsa.type, n->rid);
s_rem_node(SNODE en); s_rem_node(SNODE en);
if (en->lsa_body != NULL)
mb_free(en->lsa_body);
en->lsa_body = NULL;
ospf_hash_delete(n->lsrth, en); ospf_hash_delete(n->lsrth, en);
} }
} }

42
proto/ospf/lsupd.c
View File

@ -241,9 +241,6 @@ ospf_lsupd_flood(struct proto_ospf *po,
if ((en = ospf_hash_find_header(nn->lsrth, domain, hh)) != NULL) if ((en = ospf_hash_find_header(nn->lsrth, domain, hh)) != NULL)
{ {
s_rem_node(SNODE en); s_rem_node(SNODE en);
if (en->lsa_body != NULL)
mb_free(en->lsa_body);
en->lsa_body = NULL;
ospf_hash_delete(nn->lsrth, en); ospf_hash_delete(nn->lsrth, en);
} }
} }
@ -585,6 +582,23 @@ ospf_lsupd_receive(struct ospf_packet *ps_i, struct ospf_iface *ifa,
continue; continue;
} }
/* Remove old from all ret lists */
/* pg 144 (5c) */
/* Must be done before (5b), otherwise it also removes the new entries from (5b) */
if (lsadb)
WALK_LIST(ift, po->iface_list)
WALK_LIST(ntmp, ift->neigh_list)
{
struct top_hash_entry *en;
if (ntmp->state > NEIGHBOR_EXSTART)
if ((en = ospf_hash_find_header(ntmp->lsrth, domain, &lsadb->lsa)) != NULL)
{
s_rem_node(SNODE en);
ospf_hash_delete(ntmp->lsrth, en);
}
}
/* pg 144 (5b) */
if (ospf_lsupd_flood(po, n, lsa, &lsatmp, domain, 1) == 0) if (ospf_lsupd_flood(po, n, lsa, &lsatmp, domain, 1) == 0)
{ {
DBG("Wasn't flooded back\n"); /* ps 144(5e), pg 153 */ DBG("Wasn't flooded back\n"); /* ps 144(5e), pg 153 */
@ -597,24 +611,6 @@ ospf_lsupd_receive(struct ospf_packet *ps_i, struct ospf_iface *ifa,
ospf_lsack_enqueue(n, lsa, ACKL_DELAY); ospf_lsack_enqueue(n, lsa, ACKL_DELAY);
} }
/* Remove old from all ret lists */
/* pg 144 (5c) */
if (lsadb)
WALK_LIST(ift, po->iface_list)
WALK_LIST(ntmp, ift->neigh_list)
{
struct top_hash_entry *en;
if (ntmp->state > NEIGHBOR_EXSTART)
if ((en = ospf_hash_find_header(ntmp->lsrth, domain, &lsadb->lsa)) != NULL)
{
s_rem_node(SNODE en);
if (en->lsa_body != NULL)
mb_free(en->lsa_body);
en->lsa_body = NULL;
ospf_hash_delete(ntmp->lsrth, en);
}
}
if ((lsatmp.age == LSA_MAXAGE) && (lsatmp.sn == LSA_MAXSEQNO) if ((lsatmp.age == LSA_MAXAGE) && (lsatmp.sn == LSA_MAXSEQNO)
&& lsadb && can_flush_lsa(po)) && lsadb && can_flush_lsa(po))
{ {
@ -661,10 +657,8 @@ ospf_lsupd_receive(struct ospf_packet *ps_i, struct ospf_iface *ifa,
{ {
/* pg145 (7a) */ /* pg145 (7a) */
s_rem_node(SNODE en); s_rem_node(SNODE en);
if (en->lsa_body != NULL)
mb_free(en->lsa_body);
en->lsa_body = NULL;
ospf_hash_delete(n->lsrth, en); ospf_hash_delete(n->lsrth, en);
if (ifa->state == OSPF_IS_BACKUP) if (ifa->state == OSPF_IS_BACKUP)
{ {
if (n->rid == ifa->drid) if (n->rid == ifa->drid)