Subject: Re: [PATCH v4] tcp: harmonize tcp_vx_rcv header length assumptions

From: William Allen Simpson <[email-masked]>
Date: Wed, 13 Jan 2010 16:13:46 -0500

I did today's tests on tcp_ipv4, but part of this harmonization is to
make v4 and v6 match up better.  As I was examining line by line, one of
the things that leaps out is that ipv4 has nf_reset(skb):

tcp_ipv4:
	if (!xfrm4_policy_check(sk, XFRM_POLICY_IN, skb))
		goto discard_and_relse;
	nf_reset(skb);

	if (sk_filter(sk, skb))
		goto discard_and_relse;

tcp_ipv6:
	if (!xfrm6_policy_check(sk, XFRM_POLICY_IN, skb))
		goto discard_and_relse;

	if (sk_filter(sk, skb))
		goto discard_and_relse;

Does anybody know why?  Should ipv6 have it?  Or at least a comment
explaining the reasoning for the omission?