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From: sclayton@wpi.WPI.EDU (Shawn A Clayton)
Newsgroups: comp.protocols.tcp-ip
Subject: Problems with TCP, read(), and write()
Message-ID: <1991Mar30.174657.28200@wpi.WPI.EDU>
Date: 30 Mar 91 17:46:57 GMT
Sender: sclayton@wpi.WPI.EDU (Shawn A Clayton)
Organization: Worcester Polytechnic Institute
Lines: 22


I am having problems with TCP, write(), and read(). I want to send and
receive 32 byte structures.  The sockets used are of the type
SOCK_STREAM, and I write() 32 byte chunks into one end (after connect()ing)
and attempt to read() 32 byte chunks from the other end (after listen()ing
and accept()ing).  I write and read many of these 32 byte structures in
succession.  My problem is that if I do no put a sizeable delay in the
send or receive loop, I end up receiving only part of a 32 byte chunk
after a number of chunks have been received.  There is no problem if I put
in a large (the larger the better) delay before each write() or read().
I do not use the )_NDELAY or O_NONBLOCK options.  Sometimes it will work
with a given delay, and other times it does not.  I seems to fail less
the longer the delay is, and more the less the delay.  It also fails more
if the total number of chunks I attempt to send is increased.  Below about
fourty of these chunks there is no problem.  Can anyone help me?  What am
I doing wrong?  I would appreciate any comments or suggestions on what
may be screwing this up.  Please email me - 

	Thanks - Shawn
	sclayton@ee.wpi.edu
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