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[ipv4] Ignore non-open net devices when performing routing 

We do not discard routing table entries when closing an interface.  It
is plausible that multiple interfaces may be on the same physical
network; if so, then we may end up in a situation whereby outbound
packets attempt to route via a closed interface.

Fix by ignoring non-open net devices in ipv4_route().
pull/1/head
Michael Brown 2009-11-14 03:02:16 +00:00
parent 55d23b19a2
commit 4933ccbf65
1 changed files with 2 additions and 0 deletions
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2
src/net/ipv4.c
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@ -118,6 +118,8 @@ static struct ipv4_miniroute * ipv4_route ( struct in_addr *dest ) {
/* Find first usable route in routing table */ /* Find first usable route in routing table */
list_for_each_entry ( miniroute, &ipv4_miniroutes, list ) { list_for_each_entry ( miniroute, &ipv4_miniroutes, list ) {
if ( ! ( miniroute->netdev->state & NETDEV_OPEN ) )
continue;
local = ( ( ( dest->s_addr ^ miniroute->address.s_addr ) local = ( ( ( dest->s_addr ^ miniroute->address.s_addr )
& miniroute->netmask.s_addr ) == 0 ); & miniroute->netmask.s_addr ) == 0 );
has_gw = ( miniroute->gateway.s_addr ); has_gw = ( miniroute->gateway.s_addr );