[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: Patrick Caulfield <patrick@tykepenguin.com> Signed-off-by: David S. Miller <davem@davemloft.net>
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@ -408,11 +408,14 @@ int dn_neigh_router_hello(struct sk_buff *skb)
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}
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}
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if (!dn_db->router) {
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dn_db->router = neigh_clone(neigh);
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} else {
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if (msg->priority > ((struct dn_neigh *)dn_db->router)->priority)
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neigh_release(xchg(&dn_db->router, neigh_clone(neigh)));
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/* Only use routers in our area */
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if ((dn_ntohs(src)>>10) == dn_ntohs((decnet_address)>>10)) {
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if (!dn_db->router) {
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dn_db->router = neigh_clone(neigh);
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} else {
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if (msg->priority > ((struct dn_neigh *)dn_db->router)->priority)
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neigh_release(xchg(&dn_db->router, neigh_clone(neigh)));
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}
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}
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write_unlock(&neigh->lock);
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neigh_release(neigh);
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