diff options
Diffstat (limited to 'ospfd/ospf_interface.c')
| -rw-r--r-- | ospfd/ospf_interface.c | 28 |
1 files changed, 24 insertions, 4 deletions
diff --git a/ospfd/ospf_interface.c b/ospfd/ospf_interface.c index 067d551d..4be81995 100644 --- a/ospfd/ospf_interface.c +++ b/ospfd/ospf_interface.c @@ -125,6 +125,21 @@ ospf_if_reset_variables (struct ospf_interface *oi) oi->v_ls_ack = 1; } +/* lookup oi for specified prefix/ifp */ +struct ospf_interface * +ospf_if_table_lookup (struct interface *ifp, struct prefix *prefix) +{ + struct prefix p; + struct route_node rn; + + p = *prefix; + + rn = route_node_get (IF_OIFS (ifp), &p)); + /* route_node_get implicitely locks */ + route_node_unlock (rn); + return (struct ospf_interface *) rn->info; +} + void ospf_add_to_if (struct interface *ifp, struct ospf_interface *oi) { @@ -138,7 +153,7 @@ ospf_add_to_if (struct interface *ifp, struct ospf_interface *oi) /* rn->info should either be NULL or equal to this oi * as route_node_get may return an existing node */ - assert (! rn->info || rn->info == oi); + assert (!rn->info || rn->info == oi); rn->info = oi; } @@ -164,9 +179,14 @@ ospf_if_new (struct ospf *ospf, struct interface *ifp, struct prefix *p) { struct ospf_interface *oi; - oi = XCALLOC (MTYPE_OSPF_IF, sizeof (struct ospf_interface)); - memset (oi, 0, sizeof (struct ospf_interface)); - + if ((oi = ospf_if_table_lookup (ifp, p)) == NULL) + { + oi = XCALLOC (MTYPE_OSPF_IF, sizeof (struct ospf_interface)); + memset (oi, 0, sizeof (struct ospf_interface)); + } + else + return oi; + /* Set zebra interface pointer. */ oi->ifp = ifp; oi->address = p; |