diff options
Diffstat (limited to 'nest/neighbor.c')
| -rw-r--r-- | nest/neighbor.c | 38 |
1 files changed, 25 insertions, 13 deletions
diff --git a/nest/neighbor.c b/nest/neighbor.c index 2c5af6a6..a44667f5 100644 --- a/nest/neighbor.c +++ b/nest/neighbor.c @@ -100,13 +100,21 @@ if_connected(ip_addr *a, struct iface *i) /* -1=error, 1=match, 0=no match */ * IP address, neigh_find() returns %NULL. */ + neighbor * neigh_find(struct proto *p, ip_addr *a, unsigned flags) { + return neigh_find2(p, a, NULL, flags); +} + + +neighbor * +neigh_find2(struct proto *p, ip_addr *a, struct iface *ifa, unsigned flags) +{ neighbor *n; int class, scope = SCOPE_HOST; unsigned int h = neigh_hash(p, a); - struct iface *i, *j; + struct iface *i; WALK_LIST(n, neigh_hash_table[h]) /* Search the cache */ if (n->proto == p && ipa_equal(*a, n->addr)) @@ -115,27 +123,31 @@ neigh_find(struct proto *p, ip_addr *a, unsigned flags) class = ipa_classify(*a); if (class < 0) /* Invalid address */ return NULL; - if ((class & IADDR_SCOPE_MASK) < SCOPE_SITE || + if (((class & IADDR_SCOPE_MASK) == SCOPE_HOST) || + (((class & IADDR_SCOPE_MASK) == SCOPE_LINK) && (ifa == NULL)) || !(class & IADDR_HOST)) return NULL; /* Bad scope or a somecast */ - j = NULL; - WALK_LIST(i, iface_list) - if ((scope = if_connected(a, i)) >= 0) - { - j = i; - break; - } - if (!j && !(flags & NEF_STICKY)) + if (ifa) + scope = if_connected(a, ifa); + else + WALK_LIST(i, iface_list) + if ((scope = if_connected(a, i)) >= 0) + { + ifa = i; + break; + } + + if (!ifa && !(flags & NEF_STICKY)) return NULL; n = sl_alloc(neigh_slab); n->addr = *a; - n->iface = j; - if (j) + n->iface = ifa; + if (ifa) { add_tail(&neigh_hash_table[h], &n->n); - add_tail(&j->neighbors, &n->if_n); + add_tail(&ifa->neighbors, &n->if_n); } else { |