[NETFILTER 01/04]: Fix routing of REJECT target generated packets in output chain

[Patrick McHardy <kaber@trash.net>]

[NETFILTER]: Fix routing of REJECT target generated packets in output chain

Packets generated by the REJECT target in the output chain have a local
destination address and a foreign source address. Make sure not to use
the foreign source address for the output route lookup.

Signed-off-by: Patrick McHardy <kaber@trash.net>

---
commit 8d63ea0b410fed5a1d7493fa139592394ad01664
tree 859623f78e85fddaf314ba3d8b6a623fcda8d5bb
parent 1edb5a2de7a29144644794208eb63abbca419430
author Patrick McHardy <kaber@trash.net> Wed, 10 Jan 2007 05:43:39 +0100
committer Patrick McHardy <kaber@trash.net> Wed, 10 Jan 2007 05:43:39 +0100

 net/ipv4/netfilter.c |    7 +++++--
 1 files changed, 5 insertions(+), 2 deletions(-)

diff --git a/net/ipv4/netfilter.c b/net/ipv4/netfilter.c
index e2005c6..0147a18 100644
--- a/net/ipv4/netfilter.c
+++ b/net/ipv4/netfilter.c
@@ -15,16 +15,19 @@ int ip_route_me_harder(struct sk_buff **
 	struct flowi fl = {};
 	struct dst_entry *odst;
 	unsigned int hh_len;
+	unsigned int type;
 
+	type = inet_addr_type(iph->saddr);
 	if (addr_type == RTN_UNSPEC)
-		addr_type = inet_addr_type(iph->saddr);
+		addr_type = type;
 
 	/* some non-standard hacks like ipt_REJECT.c:send_reset() can cause
 	 * packets with foreign saddr to appear on the NF_IP_LOCAL_OUT hook.
 	 */
 	if (addr_type == RTN_LOCAL) {
 		fl.nl_u.ip4_u.daddr = iph->daddr;
-		fl.nl_u.ip4_u.saddr = iph->saddr;
+		if (type == RTN_LOCAL)
+			fl.nl_u.ip4_u.saddr = iph->saddr;
 		fl.nl_u.ip4_u.tos = RT_TOS(iph->tos);
 		fl.oif = (*pskb)->sk ? (*pskb)->sk->sk_bound_dev_if : 0;
 #ifdef CONFIG_IP_ROUTE_FWMARK