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OSPF: Support for graceful restart

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Implement OSPFv2 (RFC 3623) and OSPFv3 (RFC 5187) graceful restart,
for both restarting and helper sides. Graceful restart is initiated
by 'graceful down' command.
This commit is contained in:
Ondrej Zajicek (work)
2019-06-30 20:12:59 +02:00
parent 8a68316eb9
commit 1a2ad348f6
13 changed files with 660 additions and 26 deletions
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6
proto/ospf/dbdes.c
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@@ -215,7 +215,7 @@ ospf_send_dbdes(struct ospf_proto *p, struct ospf_neighbor *n)
ASSERT((n->state == NEIGHBOR_EXSTART) || (n->state == NEIGHBOR_EXCHANGE));
if (n->ifa->oa->rt == NULL)
if (!n->ifa->oa->rt && !p->gr_recovery)
return;
ospf_prepare_dbdes(p, n);
@@ -279,6 +279,10 @@ ospf_process_dbdes(struct ospf_proto *p, struct ospf_packet *pkt, struct ospf_ne
if (LSA_SCOPE(lsa_type) == LSA_SCOPE_RES)
DROP1("LSA with invalid scope");
/* RFC 3623 2.2 (2) special case - check for my router-LSA (GR recovery) */
if ((lsa_type == LSA_T_RT) && (lsa.rt == p->router_id))
n->got_my_rt_lsa = 1;
en = ospf_hash_find(p->gr, lsa_domain, lsa.id, lsa.rt, lsa_type);
if (!en || (lsa_comp(&lsa, &(en->lsa)) == CMP_NEWER))
{