Re: TCP/IP header question


James B. VanBokkelen (jbvb@BORAX.LCS.MIT.EDU)
Tue, 10 Mar 87 23:09:57 est


I don't see any reason to send obsolete information; our
implementation updates both ACKs and Window to the values current at
the instant the packet is sent. Of course, this does mean we have to
re-checksum the packet, but we have to do this anyway if a packet gets
partially ack'ed (which you'd better be prepared for...) Note that it
*does* seem like a good idea (not mine) to retain the IP
'identification' so that fragments can be assembled from any instance
of (re)transmission of a given packet.

jbvb@ai.ai.mit.edu
James B. VanBokkelen
FTP Software, Inc.



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