From: causeless <causeless@gmail.com>
To: netfilter@vger.kernel.org
Subject: length module documentation mismatch
Date: Thu, 04 Jun 2015 23:56:18 +0900 [thread overview]
Message-ID: <55706712.7040705@gmail.com> (raw)
In iptables-extension man page, it says length module matches the payload of L3.
but xt_length.c matches the total length of IPv4/v6 packet.
https://github.com/torvalds/linux/blob/4f671fe2f9523a1ea206f63fe60a7c7b3a56d5c7/net/netfilter/xt_length.c#L27
> u_int16_t pktlen = ntohs(ip_hdr(skb)->tot_len);
http://git.netfilter.org/iptables/tree/extensions/libxt_length.man
> This module matches the length of the layer-3 payload (e.g. layer-4 packet)
should have been, perhaps,
> This module matches the length of the layer-3 packet (e.g. layer-2 payload)
reply other threads:[~2015-06-04 14:56 UTC|newest]
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