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From: John Baldwin <jhb@FreeBSD.org>
Date: Tue, 17 Nov 2009 16:17:11 +0000 (UTC)
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X-FreeBSD-CVS-Branch: RELENG_8
Subject: cvs commit: src/sys/netinet tcp_output.c
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jhb         2009-11-17 16:17:11 UTC

  FreeBSD src repository

  Modified files:        (Branch: RELENG_8)
    sys/netinet          tcp_output.c 
  Log:
  SVN rev 199400 on 2009-11-17 16:17:11Z by jhb
  
  MFC 198990:
  Several years ago a feature was added to TCP that casued soreceive() to
  send an ACK right away if data was drained from a TCP socket that had
  previously advertised a zero-sized window.  The current code requires the
  receive window to be exactly zero for this to kick in.  If window scaling is
  enabled and the window is smaller than the scale, then the effective window
  that is advertised is zero.  However, in that case the zero-sized window
  handling is not enabled because the window is not exactly zero.  The fix
  changes the code to check the raw window value against zero.
  
  Revision   Changes    Path
  1.164.2.2  +1 -1      src/sys/netinet/tcp_output.c