Relay-Version: version B 2.10 5/3/83; site utzoo.UUCP
Path: utzoo!mnetor!seismo!rutgers!ames!ucbcad!ucbvax!CCV.BBN.COM!brescia
From: brescia@CCV.BBN.COM (Mike Brescia)
Newsgroups: mod.protocols.tcp-ip
Subject: Re: Gateway Monitoring
Message-ID: <8701192055.AA14548@ucbvax.Berkeley.EDU>
Date: Mon, 19-Jan-87 14:42:47 EST
Article-I.D.: ucbvax.8701192055.AA14548
Posted: Mon Jan 19 14:42:47 1987
Date-Received: Tue, 20-Jan-87 05:00:45 EST
References: <8701181501.AA11439@csv.rpi.edu>
Sender: daemon@ucbvax.BERKELEY.EDU
Organization: The ARPA Internet
Lines: 16
Approved: tcp-ip@sri-nic.arpa

Re: de-multiplexing -

TOPS-20 allows distribution to a user process of any protocol which does not
conflict with any other already used (kernel) protocol, and also allows
demultiplexing within a single protocol based on a port number (declared by
the user to be a mask and value combination somewhere in the first 4 bytes).
Thus, I can use XNET (protocol 15), since the kernel does nothing with it, and
also another user can use XNET as well, since there is a port number which is
used to distinguish her info from mine.

I would like to see UNIX able to give me the packets not explicitly granted to
the kernel.  I could then run an EGP tester (or a GGP spoofer) in user mode.

cf. Bill of Rights, Article 10.

    Mike