Subject: Re: 2.6.11-rc2 TCP ignores PMTU ICMP (Re: Linux 2.6.11-rc2)

From: Patrick McHardy <[email-masked]>
Date: Fri, 28 Jan 2005 02:33:10 +0100

David S. Miller wrote:

>I've forwarded this to netfilter-devel for inspection.
>Thanks for collecting all the data points so well.
>
Here is the fix for everyone. Please report back if it doesn't
solve the problem. Thanks.

===== net/ipv4/netfilter/ip_nat_proto_tcp.c 1.10 vs edited =====
--- 1.10/net/ipv4/netfilter/ip_nat_proto_tcp.c	2005-01-17 23:00:55 +01:00
+++ edited/net/ipv4/netfilter/ip_nat_proto_tcp.c	2005-01-28 02:13:06 +01:00
@@ -105,7 +105,7 @@
 		return 0;
 
 	iph = (struct iphdr *)((*pskb)->data + iphdroff);
-	hdr = (struct tcphdr *)((*pskb)->data + iph->ihl*4);
+	hdr = (struct tcphdr *)((*pskb)->data + hdroff);
 
 	if (maniptype == IP_NAT_MANIP_SRC) {
 		/* Get rid of src ip and src pt */