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To: current@freebsd.org
Subject: Processing ICMP packets (was: -stable hangs at boot (fwd)) 
In-reply-to: Your message of "Wed, 28 Feb 1996 11:14:21 PST."
             <96Feb28.111437pst.177480@crevenia.parc.xerox.com> 
Date: Thu, 29 Feb 1996 11:10:43 +0100
Message-ID: <11766.825588643@curie.cs.utwente.nl>
From: Andras Olah <olah@cs.utwente.nl>
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On Wed, 28 Feb 1996 11:14:21 PST, Bill Fenner wrote:
> In message <199602262117.PAA15987@brasil.moneng.mei.com>you write:
> >Yes, I can imagine  :-)  I just want my firewalls to do something mildly
> >more social - like return a HOST_UNREACHABLE
> 
> How about "Communication Administratively Prohibited" (code 13, see RFC1812 
> section 5.3.9)

I've got two questions related to the handling of ICMP packets:

1. Shouldn't icmp_input() map ICMP type 3, code 13 packets to
PRC_UNREACH* error codes, instead of discarding them?

2. Background info: What's the difference between codes 9, 10
(ICMP_UNREACH_{NET,HOST_PROHIB) and 13?  Is 13 a code which covers
both 9 and 10, or does it have a special meaning?

Thanks,
  Andras