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[DECNET]: Only use local routers

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The attached patch makes DECnet routing only use routers from the same
area - rather than the highest rated router seen.

In theory there should not be an out-of-area router on a local network
but some networks are bridged rather than properly routed. VMS seems
to behave similarly: if I bring up a VMS node with no router then it
can't see anything else on the global network.

Signed-off-by: Patrick Caulfield <patrick@tykepenguin.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Patrick Caulfield 2006-01-03 14:24:02 -08:00 committed by David S. Miller
parent 4b5bdf5cc3
commit 5062430c5c
1 changed files with 8 additions and 5 deletions
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13
net/decnet/dn_neigh.c
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@ -408,11 +408,14 @@ int dn_neigh_router_hello(struct sk_buff *skb)
}
}
if (!dn_db->router) {
dn_db->router = neigh_clone(neigh);
} else {
if (msg->priority > ((struct dn_neigh *)dn_db->router)->priority)
neigh_release(xchg(&dn_db->router, neigh_clone(neigh)));
/* Only use routers in our area */
if ((dn_ntohs(src)>>10) == dn_ntohs((decnet_address)>>10)) {
if (!dn_db->router) {
dn_db->router = neigh_clone(neigh);
} else {
if (msg->priority > ((struct dn_neigh *)dn_db->router)->priority)
neigh_release(xchg(&dn_db->router, neigh_clone(neigh)));
}
}
write_unlock(&neigh->lock);
neigh_release(neigh);