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From: ddp+@ANDREW.CMU.EDU (Drew Daniel Perkins)
Newsgroups: comp.protocols.tcp-ip.ibmpc
Subject: Re: non-blocking sends in CMU-PCIP
Message-ID: <EVbp4oy00UoJA-g1Hj@andrew.cmu.edu>
Date: Mon, 16-Nov-87 16:59:07 EST
Article-I.D.: andrew.EVbp4oy00UoJA-g1Hj
Posted: Mon Nov 16 16:59:07 1987
Date-Received: Wed, 18-Nov-87 06:32:18 EST
References: <285884.871114.PAP4@AI.AI.MIT.EDU>
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Organization: The ARPA Internet
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You definitely don't want to do that.  All the upper level code (especially 
TCP) depends on the fact that once they've done a send they can muck with the 
packet all they want.  If you haven't copied the packet to the board or to 
another area of memory it may get trampled before it gets sent.  Also, you 
probably don't want to play with the 3com 3c501 tx interrupts.  No one has 
ever been able to get them working correctly in all possible cases.

Drew