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authorHarald Welte <laforge@netfilter.org>2005-08-08 11:50:55 +0200
committerLinus Torvalds <torvalds@g5.osdl.org>2005-08-08 11:48:28 -0700
commit8b83bc77bf77cc8459cb94e52b08e775104c4c48 (patch)
tree89f84bdd6a13763882636913852c6ce2eaea199c /net
parent48de5beeb0ee821859c79ba5b9462654604d8bf3 (diff)
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[PATCH] don't try to do any NAT on untracked connections
With the introduction of 'rustynat' in 2.6.11, the old tricks of preventing NAT of 'untracked' connections (e.g. NOTRACK target in 'raw' table) are no longer sufficient. The ip_conntrack_untracked.status |= IPS_NAT_DONE_MASK effectively prevents iteration of the 'nat' table, but doesn't prevent nat_packet() to be executed. Since nr_manips is gone in 'rustynat', nat_packet() now implicitly thinks that it has to do NAT on the packet. This patch fixes that problem by explicitly checking for ip_conntrack_untracked in ip_nat_fn(). Signed-off-by: Harald Welte <laforge@netfilter.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'net')
-rw-r--r--net/ipv4/netfilter/ip_nat_standalone.c4
1 files changed, 4 insertions, 0 deletions
diff --git a/net/ipv4/netfilter/ip_nat_standalone.c b/net/ipv4/netfilter/ip_nat_standalone.c
index bc59d0d6e89..91d5ea1dbbc 100644
--- a/net/ipv4/netfilter/ip_nat_standalone.c
+++ b/net/ipv4/netfilter/ip_nat_standalone.c
@@ -102,6 +102,10 @@ ip_nat_fn(unsigned int hooknum,
return NF_ACCEPT;
}
+ /* Don't try to NAT if this packet is not conntracked */
+ if (ct == &ip_conntrack_untracked)
+ return NF_ACCEPT;
+
switch (ctinfo) {
case IP_CT_RELATED:
case IP_CT_RELATED+IP_CT_IS_REPLY: