From mboxrd@z Thu Jan  1 00:00:00 1970
From: =?ISO-8859-1?Q?Bj=F6rn_Lindstr=F6m?= <bjorn.mailinglist@gmail.com>
Subject: checking rule specifications in a match
Date: Mon, 19 Jun 2006 11:08:36 +0200
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Hi.
I am writing an iptables match to match the IEC-60870-5-104 protocol.
I only want this match to be used on tcp packets and therefore I want=20
iptables to reject rules if does not specify tcp as the protocol (-p=20
tcp). I am currently doing this check in the checkentry function in the=20
kernel module. This works but the error message only say "iptables:=20
Unknown error 4294967295" if -p tcp is left out. Is it possible to do=20
this check any other way to get a more comprehensible error message?
Thanks.
Bj=F6rn Lindstr=F6m