From mboxrd@z Thu Jan  1 00:00:00 1970
From: Patrick McHardy <kaber@trash.net>
Subject: Re: [PATCH 1/2] socket: Added 'transparent' option
Date: Fri, 24 Apr 2009 16:54:53 +0200
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Cc: netfilter-devel@vger.kernel.org
To: Laszlo Attila Toth <panther@balabit.hu>
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Laszlo Attila Toth wrote:
> The socket match has an own matchinfo structure, with one boolean field,
> transparent, which is true when only transparent sockets can be matched.
> 
> @@ -161,6 +168,7 @@ static struct xt_match socket_mt_reg __read_mostly = {
>  	.name		= "socket",
>  	.family		= AF_INET,
>  	.match		= socket_mt,
> +	.matchsize	= sizeof(struct xt_socket_match_info),

This will break compatibility with old iptables binaries. You need
to add a new revision for this.