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().
/* Find first usable route in routing table */
list_for_each_entry ( miniroute, &ipv4_miniroutes, list ) {
+ if ( ! ( miniroute->netdev->state & NETDEV_OPEN ) )
+ continue;
local = ( ( ( dest->s_addr ^ miniroute->address.s_addr )
& miniroute->netmask.s_addr ) == 0 );
has_gw = ( miniroute->gateway.s_addr );