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Fixes a bug with neighbor cache and overlapping IP prefixes.

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When there are overlapping IP prefixes and one disappears,
neighbors associated with it was removed even if there
is another covering IP prefix.
This commit is contained in:
Ondrej Zajicek
2012-08-16 13:09:26 +02:00
parent d760229ab8
commit 8ecbaf9c70
1 changed files with 16 additions and 2 deletions
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18
nest/neighbor.c
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@@ -114,7 +114,7 @@ neighbor *
neigh_find2(struct proto *p, ip_addr *a, struct iface *ifa, unsigned flags)
{
neighbor *n;
int class, scope = -1; ;
int class, scope = -1;
unsigned int h = neigh_hash(p, a);
struct iface *i;
@@ -240,7 +240,21 @@ neigh_down(neighbor *n)
n->proto->neigh_notify(n);
rem_node(&n->n);
if (n->flags & NEF_STICKY)
add_tail(&sticky_neigh_list, &n->n);
{
add_tail(&sticky_neigh_list, &n->n);
/* Respawn neighbor if there is another matching prefix */
struct iface *i;
int scope;
if (!n->iface)
WALK_LIST(i, iface_list)
if ((scope = if_connected(&n->addr, i)) >= 0)
{
neigh_up(n, i, scope);
return;
}
}
else
sl_free(neigh_slab, n);
}