Re: [ns] dup ACK behavior with SACK

[Sally Floyd <floyd@aciri.org>]

Ethan -

>Attached is a patch modifying the behavior of Sack1 TCP regarding duplicate
>ACKs.  This patch causes NS to ignore any dup ACKs that do not contain *new*
>SACK information when counting dup ACKs for fast restransmit.

Many thanks, I have added it to the NS distribution.
- Sally

CVS LOG FOR ns-2
-------------------

Commit by sfloyd

Update of /nfs/jade/vint/CVSROOT/vint/ns-2
In directory vir.isi.edu:/tmp/cvs-serv17809

Modified Files:
	scoreboard.cc scoreboard.h tcp-sack1.cc 
Log Message:
Adding code contributed by Ethan Blanton, so that the Sack1 TCP
sender checks if duplicate acknowledgements acknowledge the receipt
of new data, for the one-way Sack1 TCP.
This is validated in "test-all-ecn ecn_noBugfix_sack".

--------------------
Modified Files:
	ecn_noBugfix_sack.Z