From owner-freebsd-questions Mon Feb 26 12:36:55 1996 Return-Path: owner-questions Received: (from root@localhost) by freefall.freebsd.org (8.7.3/8.7.3) id MAA14114 for questions-outgoing; Mon, 26 Feb 1996 12:36:55 -0800 (PST) Received: from labinfo.iet.unipi.it (labinfo.iet.unipi.it [131.114.9.5]) by freefall.freebsd.org (8.7.3/8.7.3) with SMTP id MAA14096 for ; Mon, 26 Feb 1996 12:36:42 -0800 (PST) Received: from localhost (luigi@localhost) by labinfo.iet.unipi.it (8.6.5/8.6.5) id VAA01300; Mon, 26 Feb 1996 21:29:53 +0100 From: Luigi Rizzo Message-Id: <199602262029.VAA01300@labinfo.iet.unipi.it> Subject: Re: invalid option in TCP header To: pmac@til_cad1.kasten.on.ca (Peter MacKenzie) Date: Mon, 26 Feb 1996 21:29:53 +0100 (MET) Cc: questions@freebsd.org In-Reply-To: <199602261727.JAA02503@freefall.freebsd.org> from "Peter MacKenzie" at Feb 26, 96 12:29:56 pm X-Mailer: ELM [version 2.4 PL23] Content-Type: text Sender: owner-questions@freebsd.org Precedence: bulk > Is there an invalid option in the option list of the TCP header with > FreeBSD 2.1.0? > > When I open a telnet session the first packet has the SYN control bit > correctly set. The first four bytes of the TCP options correctly refer > to the maximum segment size however the next byte is a no operation option > (01, should this be an end of option list) and the next one is (as far > as I am aware) an invalid option (03). Does BSD expect that this should > be ignored or is there a new option that I am not aware of? Isn't it some padding ? Luigi ==================================================================== Luigi Rizzo Dip. di Ingegneria dell'Informazione email: luigi@iet.unipi.it Universita' di Pisa tel: +39-50-568533 via Diotisalvi 2, 56126 PISA (Italy) fax: +39-50-568522 http://www.iet.unipi.it/~luigi/ ====================================================================