From 2f9616d4c44349c903bc1b54fe46ab0ce0210b74 Mon Sep 17 00:00:00 2001 From: Marcus Sundberg Date: Mon, 12 Dec 2005 15:02:48 -0800 Subject: [PATCH] [NETFILTER]: ip_nat_tftp: Fix expectation NAT When a TFTP client is SNATed so that the port is also changed, the port is never changed back for the expected connection. Signed-off-by: Marcus Sundberg Signed-off-by: Patrick McHardy Signed-off-by: David S. Miller --- net/ipv4/netfilter/ip_nat_tftp.c | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-) diff --git a/net/ipv4/netfilter/ip_nat_tftp.c b/net/ipv4/netfilter/ip_nat_tftp.c index 2215317c76..43c3bd7c11 100644 --- a/net/ipv4/netfilter/ip_nat_tftp.c +++ b/net/ipv4/netfilter/ip_nat_tftp.c @@ -42,7 +42,10 @@ static unsigned int help(struct sk_buff **pskb, enum ip_conntrack_info ctinfo, struct ip_conntrack_expect *exp) { - exp->saved_proto.udp.port = exp->tuple.dst.u.tcp.port; + struct ip_conntrack *ct = exp->master; + + exp->saved_proto.udp.port + = ct->tuplehash[IP_CT_DIR_ORIGINAL].tuple.src.u.udp.port; exp->dir = IP_CT_DIR_REPLY; exp->expectfn = ip_nat_follow_master; if (ip_conntrack_expect_related(exp) != 0) -- 2.39.5