Commit 5062430c authored by Patrick Caulfield's avatar Patrick Caulfield Committed by David S. Miller

[DECNET]: Only use local routers

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: default avatarPatrick Caulfield <patrick@tykepenguin.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent 4b5bdf5c
...@@ -408,12 +408,15 @@ int dn_neigh_router_hello(struct sk_buff *skb) ...@@ -408,12 +408,15 @@ int dn_neigh_router_hello(struct sk_buff *skb)
} }
} }
/* Only use routers in our area */
if ((dn_ntohs(src)>>10) == dn_ntohs((decnet_address)>>10)) {
if (!dn_db->router) { if (!dn_db->router) {
dn_db->router = neigh_clone(neigh); dn_db->router = neigh_clone(neigh);
} else { } else {
if (msg->priority > ((struct dn_neigh *)dn_db->router)->priority) if (msg->priority > ((struct dn_neigh *)dn_db->router)->priority)
neigh_release(xchg(&dn_db->router, neigh_clone(neigh))); neigh_release(xchg(&dn_db->router, neigh_clone(neigh)));
} }
}
write_unlock(&neigh->lock); write_unlock(&neigh->lock);
neigh_release(neigh); neigh_release(neigh);
} }
......
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