linux-kernel - Re: [2.6 patch] unexport icmpmsg

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Date:	Wed, 24 Oct 2007 16:24:35 -0400
From:	Vlad Yasevich <vladislav.yasevich@...com>
To:	David Stevens <dlstevens@...ibm.com>
Cc:	Adrian Bunk <bunk@...nel.org>, linux-kernel@...r.kernel.org,
	netdev@...r.kernel.org, netdev-owner@...r.kernel.org
Subject: Re: [2.6 patch] unexport icmpmsg_statistics

David Stevens wrote:
> I took a look at the DCCP references, and I think they're just
> incrementing the wrong MIB variable -- e.g., it's incrementing
> ICMP_MIB_INERRORS when the skb length is less than the
> header indicates. That's not an ICMP_MIB_INERRORS error,
> that's an IPSTATS_MIB_INHDRERRORS error. ICMP_MIB_INERRORS
> is when you receive an ICMP error packet; an IP header error
> is something else entirely.
> 
> That's followed by a failed lookup incrementing ICMP_MIB_INERRORS
> which should be an unknown port error in the transport MIB (assuming
> it has one-- it's not an ICMP error; could be an IP error, if the address
> isn't local, rather than unknown port).
> 
> In SCTP, it appears to have similar problems. SCTP errors are not
> ICMP errors, though it perhaps should be calling icmp_send() to
> send one to the offending host for some of the cases.
> 
> I haven't seen any ICMP-relevant stats correctly referenced in
> these yet.
> 
> I don't want to patch them directly, since I can't easily test them;
> if someone who works with DCCP and SCTP would like to, I'd
> be happy to review. Any volunteers?

I'll take a look at the SCTP ones.  Thanks for review.

-vlad

> 
>                                                 +-DLS
> 
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