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From: CLYNN@G.BBN.COM.UUCP
Newsgroups: comp.protocols.tcp-ip
Subject: Re: ..."layering violations"
Message-ID: <[G.BBN.COM]29-Oct-87.08:39:03.CLYNN>
Date: Thu, 29-Oct-87 08:39:00 EST
Article-I.D.: <[G.BBN.COM]29-Oct-87.08:39:03.CLYNN>
Posted: Thu Oct 29 08:39:00 1987
Date-Received: Sun, 1-Nov-87 04:57:03 EST
References: <1505@faline.bellcore.com>
Sender: daemon@ucbvax.BERKELEY.EDU
Organization: The ARPA Internet
Lines: 11

Phil,	ICMP messages DO conatin an IP source address of the gateway
which sent the message - look in the IP header's Source Address field.
If the available software does not include such basic information
when the ICMP message is passed by IP to the ICMP "layer", complain to
the vendor.  I would also complain if the subnet address were not passed
up, or if the info wasn't available at the TCP or higher layers; I hope
that such additional information doesn't fall into the category which is
the subject of this message.  While you may find reset connections
"annoying", I suspect that others might add it to their list of "denial
of service attacks".  Remember ... Validate your input before you
process it!