From: "Albert D. Cahalan" <acahalan@cs.uml.edu>
To: mblack@csihq.com (Mike Black)
Cc: robert@kleemann.org (Robert Kleemann), linux-kernel@vger.kernel.org
Subject: Re: Client receives TCP packets but does not ACK
Date: Fri, 15 Jun 2001 14:29:16 -0400 (EDT) [thread overview]
Message-ID: <200106151829.f5FITGp162144@saturn.cs.uml.edu> (raw)
In-Reply-To: <025c01c0f598$f04d0f30$e1de11cc@csihq.com> from "Mike Black" at Jun 15, 2001 08:44:36 AM
Mike Black writes:
> I'm concerned that you're probably just overruning your IP stack:
...
> TCP is NOT a guaranteed protocol -- you can't just blast data from one port
> to another and expect it to work.
Yes you can. This is why we have TCP in fact.
> a tcp-write is NOT guaranteed -- and as you've seen -- a recv() isn't either
> (that's why you need timeouts).
> You're probably overrunning the tcp buffer on your "print" statement and
> truncating a block.
> I don't see where you're checking for EAGAIN or EWOULDBLOCK (see man
> send).
You do have to check for partial writes due to the UNIX API.
Then check for EAGAIN and EINTR at least.
> You need a layer-7 protocol that will guarantee your transactions -- once
> you're client acks/naks your server I'll bet everything works hunky-dory.
> If you're not familiar with the OSI model
> http://www.csihq.com/~mike/students/networking/iso/isomodel.html
You don't need that crap. TCP/IP doesn't even fit the OSI model,
and we're missing much of the OSI stack AFAIK. (Do we have that
thing with 10-byte addresses? I think not.)
next prev parent reply other threads:[~2001-06-15 18:29 UTC|newest]
Thread overview: 29+ messages / expand[flat|nested] mbox.gz Atom feed top
2001-06-13 0:26 Client receives TCP packets but does not ACK Robert Kleemann
2001-06-15 3:50 ` Robert Kleemann
2001-06-15 12:44 ` Mike Black
2001-06-15 18:29 ` Albert D. Cahalan [this message]
2001-06-15 23:10 ` Robert Kleemann
2001-06-16 11:55 ` Mike Black
2001-06-16 23:56 ` Robert Kleemann
2001-06-27 1:04 ` Robert Kleemann
[not found] <Pine.LNX.4.33.0106121720310.1152-100000@localhost.localdomain.suse.lists.linux.kernel>
2001-06-13 8:48 ` Andi Kleen
2001-06-13 16:09 ` Robert Kleemann
2001-06-15 12:53 Heusden, Folkert van
2001-06-15 18:27 ` Mike Black
2001-06-15 18:39 ` Gérard Roudier
2001-06-15 19:12 ` Alan Cox
2001-06-17 18:17 ` Pavel Machek
2001-06-17 19:32 ` Alan Cox
2001-06-17 19:40 ` Dan Podeanu
[not found] ` <200106172113.f5HLDhJ377473@saturn.cs.uml.edu>
2001-06-17 22:09 ` Dan Podeanu
2001-06-17 22:35 ` dean gaudet
2001-06-18 11:50 ` Jan Hudec
2001-06-18 16:17 ` dean gaudet
2001-06-18 16:48 ` Jonathan Morton
2001-06-18 22:30 ` dean gaudet
2001-06-18 23:43 ` Jonathan Morton
2001-06-19 2:46 ` dean gaudet
2001-06-20 21:01 ` David Schwartz
[not found] <E15BiHy-0002xC-00@the-village.bc.nu.suse.lists.linux.kernel>
2001-06-17 20:21 ` Andi Kleen
2001-07-01 21:27 Nivedita Singhvi
2001-07-11 3:43 ` Robert Kleemann
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