netdev - Re: [PATCH] RAW6: Do not allow set IPV6

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Message-Id: <20080418.040949.87112742.davem@davemloft.net>
Date:	Fri, 18 Apr 2008 04:09:49 -0700 (PDT)
From:	David Miller <davem@...emloft.net>
To:	wangchen@...fujitsu.com
Cc:	yoshfuji@...ux-ipv6.org, netdev@...r.kernel.org
Subject: Re: [PATCH] RAW6: Do not allow set IPV6_CHECKSUM for ICMPv6 socket

From: Wang Chen <wangchen@...fujitsu.com>
Date: Fri, 18 Apr 2008 18:32:46 +0800

> As RFC3542 mentions: An attempt to set IPV6_CHECKSUM for an
> ICMPv6 socket will fail.
> Add a check for that in do_rawv6_setsockopt().
> 
> Signed-off-by: Wang Chen <wangchen@...fujitsu.com>

Enforcing these kinds of things we've allowed for so many years is
rather pointless, especially if it breaks real applications.  Which I
believe it does in this case.  The standards simply do not matter.

I seem to recall that traceroute6 in iputils does exactly this.
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