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SCTP: drop SACK if ctsn is not less than the next tsn of assoc
We need to drop the SACK if the peer is attempting to acknowledge unset data, i.e. the CTSN in the SACK is greater or equal to the next TSN we will send. Example: Endpoint A Endpoint B <--------------- DATA (TSN=1) SACK(TSN=1) ---------------> <--------------- DATA (TSN=2) <--------------- DATA (TSN=3) <--------------- DATA (TSN=4) <--------------- DATA (TSN=5) SACK(TSN=1000) ---------------> <--------------- DATA (TSN=6) <--------------- DATA (TSN=7) Signed-off-by: Wei Yongjun <yjwei@cn.fujitsu.com> Signed-off-by: Vlad Yasevich <vladislav.yasevich@hp.com>
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Wei Yongjun
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Vlad Yasevich
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Aug 2, 2007
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