[PATCH 2.6 10/19]: Select source address for gateway in MASQUERADE

[Patrick McHardy <kaber@trash.net>]

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Select source address for gateway in MASQUERADE, based
on Herbert's suggestion.



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# This is a BitKeeper generated diff -Nru style patch.
#
# ChangeSet
#   2004/10/20 20:27:59+02:00 kaber@coreworks.de 
#   [NETFILTER]: Select source address for gateway in MASQUERADE
#   
#   Suggested by Herbert Xu <herbert@gondor.apana.org.au>
#   
#   Signed-off-by: Patrick McHardy <kaber@trash.net>
# 
# net/ipv4/netfilter/ipt_MASQUERADE.c
#   2004/10/20 20:26:59+02:00 kaber@coreworks.de +3 -1
#   [NETFILTER]: Select source address for gateway in MASQUERADE
#   
#   Suggested by Herbert Xu <herbert@gondor.apana.org.au>
#   
#   Signed-off-by: Patrick McHardy <kaber@trash.net>
# 
diff -Nru a/net/ipv4/netfilter/ipt_MASQUERADE.c b/net/ipv4/netfilter/ipt_MASQUERADE.c
--- a/net/ipv4/netfilter/ipt_MASQUERADE.c	2004-10-22 03:39:37 +02:00
+++ b/net/ipv4/netfilter/ipt_MASQUERADE.c	2004-10-22 03:39:37 +02:00
@@ -81,6 +81,7 @@
 	enum ip_conntrack_info ctinfo;
 	const struct ip_nat_multi_range *mr;
 	struct ip_nat_multi_range newrange;
+	struct rtable *rt;
 	u_int32_t newsrc;
 
 	IP_NF_ASSERT(hooknum == NF_IP_POST_ROUTING);
@@ -95,7 +96,8 @@
 	                    || ctinfo == IP_CT_RELATED + IP_CT_IS_REPLY));
 
 	mr = targinfo;
-	newsrc = inet_select_addr(out, 0, RT_SCOPE_UNIVERSE);
+	rt = (struct rtable *)(*pskb)->dst;
+	newsrc = inet_select_addr(out, rt->rt_gateway, RT_SCOPE_UNIVERSE);
 	if (!newsrc) {
 		printk("MASQUERADE: %s ate my IP address\n", out->name);
 		return NF_DROP;