Reply-To: <pverma@marantinetworks.com>
From: "Preetam Verma" <pverma@marantinetworks.com>
To: "'bill'" <bill@strahm.net>
Cc: <ips@ece.cmu.edu>
Subject: RE: How to handle CRC errors?
Date: Thu, 23 Jan 2003 19:41:11 -0800
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I meant the PDU has CRC error........not the TCP packet as such.

Preetam

-----Original Message-----
From: bill [mailto:bill@strahm.net]
Sent: Thursday, January 23, 2003 7:06 PM
To: Preetam Verma
Subject: RE: How to handle CRC errors?


Silly question... If the TCP CRC is incorrect, wouldn't the TOE discard
it, NAK the package and get a retransmit ?

Bill

-----Original Message-----
From: owner-ips@ece.cmu.edu [mailto:owner-ips@ece.cmu.edu] On Behalf Of
Preetam Verma
Sent: Thursday, January 23, 2003 3:32 PM
To: ips@ece.cmu.edu
Subject: How to handle CRC errors?


I have a situation like this:

                                            CPU
                                               |
                                               |
<---------------->port<---------->TCP offload engine
<------------->Logic<----------------->Application processing

The logic is going to assemble PDUs and pass them on to the application.
If a PDU that came in has CRC errors, will the application need to
signal the initiator to terminate the session? Say a PDU header from the
TCP offload engine was corrupted, how would the "logic" need to handle
the data that comes later. How do I ensure that the application receives
packets in order? How can I ensure that in such an event the PDU
processing logic does not go out of sync?

Regards

Preetam