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[lwip-devel] [bug #50914] TCP server don't update the ack num


From: shilei yu
Subject: [lwip-devel] [bug #50914] TCP server don't update the ack num
Date: Thu, 11 May 2017 02:10:58 -0400 (EDT)
User-agent: Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/57.0.2987.133 Safari/537.36

Follow-up Comment #11, bug #50914 (project lwip):

@goldsimon
It works well by setting TCP_CHECKSUM_ON_COPY_SANITY_CHECK == 1.
but i also found "tcp_output_segment: calculated checksum is ffff instead of
0" in my log, it seems has some error but fix by the sanity check. 
i'm not clear about the modification, could you kindly make an explanation?
thanks!

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