netdev - xfrm_lookup() and XFRM_POLICY

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Message-ID: <147a89290801310042y1c3f926flcf7433835d8d9961@mail.gmail.com>
Date:	Thu, 31 Jan 2008 10:42:08 +0200
From:	"Andy Johnson" <johnsonzjo@...il.com>
To:	netdev@...r.kernel.org
Subject: xfrm_lookup() and XFRM_POLICY_ICMP

Hello,

A question about XFRM_POLICY_ICMP:

 I had tried to understand this check in __xfrm_lookup() method in
  net/xfrm/xfrm_policy.c (the recent 2.6 git dave miller tree):
...
...
		if ((flags & XFRM_LOOKUP_ICMP) && !(policy->flags & XFRM_POLICY_ICMP))
		goto error;
...
...

Why is the check for XFRM_POLICY_ICMP? I had grepped under the kernel tree,
and the only place where XFRM_POLICY_ICMP appears is here (except its definition
in xfrm.h).

I also grepped under openswan tree, and could not find XFRM_POLICY_ICMP.
(the struct xfrm_userpolicy_info  in openswan includes XFRM_POLICY_ALLOW and
XFRM_POLICY_BLOCK and XFRM_POLICY_LOCALOK, but not XFRM_POLICY_ICMP).

I also grepped under iproute2 tree (from git) and there is no XFRM_POLICY_ICMP.

So is this there a way at all to set XFRM_POLICY_ICMP? and if not - maybe this
check is not needed at all ?

Regards,
Andy
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