Path: utzoo!censor!geac!torsqnt!news-server.csri.toronto.edu!cs.utexas.edu!usc!samsung!munnari.oz.au!uhccux!uhheph.phys.hawaii.edu!tony
From: tony@uhheph.phys.hawaii.edu (Tony Querubin)
Newsgroups: comp.protocols.tcp-ip
Subject: Changing TCP window size on a SUN
Keywords: TCP, window, KA9Q, SUN
Message-ID: <10703@uhccux.uhcc.Hawaii.Edu>
Date: 18 Dec 90 05:37:23 GMT
Sender: news@uhccux.uhcc.Hawaii.Edu
Organization: University of Hawaii, Dept. of Physics & Astronomy
Lines: 15

I need to change the TCP window size that a SUN advertises to other hosts
that make a connection.  Thinking that it might be a configurable kernel
option, I looked through the various /sys/netinet files for a TCP WINDOW
parameter and found none.  On a second pass through the files I noticed
a definition for TCPOPT_MAXSEG in tcp.h.  

Question:  Can anyone verify for me that this is equivalent to the TCP window
parameter in KA9Q?  I'd like to know this BEFORE I reconfigure the kernel.

Essentially, I want any host making a connection to this SUN to send only one 
TCP packet at a time.  The reason for this is that the path to the SUN goes
through a PC using a 3C501 ethernet board.

Antonio Querubin
querubin@uhunix.uhcc.hawaii.edu