From 4933ccbf654c27e3260e71bae7ade8286f69193a Mon Sep 17 00:00:00 2001
From: Michael Brown
Date: Sat, 14 Nov 2009 03:02:16 +0000
Subject: [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().
---
 src/net/ipv4.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/src/net/ipv4.c b/src/net/ipv4.c
index 6b78ad77..4c1393f2 100644
--- a/src/net/ipv4.c
+++ b/src/net/ipv4.c
@@ -118,6 +118,8 @@ static struct ipv4_miniroute * ipv4_route ( struct in_addr *dest ) {
 
 	/* 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 );
-- 
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