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[TIPC]: Links now validate destination node specified by incoming messages.

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This fix prevents link flopping and name table inconsistency problems arising
when a node is assigned a different <Z.C.N> value than it used previously.
(Changing the <Z.C.N> value causes other nodes to have two link endpoints
sending to the same MAC address using two different destination <Z.C.N> values,
requiring the receiving node to filter out the unwanted messages.)

Signed-off-by: Allan Stephens <allan.stephens@windriver.com>
Signed-off-by: Per Liden <per.liden@ericsson.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Allan Stephens 2006-06-25 23:39:31 -07:00 committed by David S. Miller
parent 9688243b63
commit 260082471e
1 changed files with 5 additions and 0 deletions
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5
net/tipc/link.c
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@ -1720,6 +1720,11 @@ void tipc_recv_msg(struct sk_buff *head, struct tipc_bearer *tb_ptr)
link_recv_non_seq(buf); link_recv_non_seq(buf);
continue; continue;
} }
if (unlikely(!msg_short(msg) &&
(msg_destnode(msg) != tipc_own_addr)))
goto cont;
n_ptr = tipc_node_find(msg_prevnode(msg)); n_ptr = tipc_node_find(msg_prevnode(msg));
if (unlikely(!n_ptr)) if (unlikely(!n_ptr))
goto cont; goto cont;