CVS commit: src/sys/netinet

["Frank Kardel" <kardel%netbsd.org@localhost>]

Module Name:    src
Committed By:   kardel
Date:           Wed Sep  2 15:08:46 UTC 2020

Modified Files:
        src/sys/netinet: tcp_input.c

Log Message:
Fix fast path for uni directional transfers
pure ACK case:

drag snd_wl2 along so only newer
ACKs can update the window size.
also avoids the state where snd_wl2
is eventually larger than th_ack and thus
blocking the window update mechanism and
the connection gets stuck for a loooong
time in the zero sized send window state.

see PR/kern 55567

ok thorpej@, also found in FreeBSD


To generate a diff of this commit:
cvs rdiff -u -r1.418 -r1.419 src/sys/netinet/tcp_input.c

Please note that diffs are not public domain; they are subject to the
copyright notices on the relevant files.