svn commit: r306517 - stable/11/sys/netinet

[Hiren Panchasara]

Author: hiren
Date: Fri Sep 30 18:14:05 2016
New Revision: 306517
URL: https://svnweb.freebsd.org/changeset/base/306517

Log:
  MFC r304855
  
  Update TCPS_HAVERCVDFIN() macro to correctly include all states a connection
  can be in after receiving a FIN.
  
  FWIW, NetBSD has this change for quite some time.
  
  This has been tested at Netflix and Limelight in production traffic.

Modified:
  stable/11/sys/netinet/tcp_fsm.h
Directory Properties:
  stable/11/   (props changed)

Modified: stable/11/sys/netinet/tcp_fsm.h
==============================================================================
--- stable/11/sys/netinet/tcp_fsm.h	Fri Sep 30 18:12:16 2016	(r306516)
+++ stable/11/sys/netinet/tcp_fsm.h	Fri Sep 30 18:14:05 2016	(r306517)
@@ -73,7 +73,8 @@
 
 #define	TCPS_HAVERCVDSYN(s)	((s) >= TCPS_SYN_RECEIVED)
 #define	TCPS_HAVEESTABLISHED(s)	((s) >= TCPS_ESTABLISHED)
-#define	TCPS_HAVERCVDFIN(s)	((s) >= TCPS_TIME_WAIT)
+#define	TCPS_HAVERCVDFIN(s)	\
+    ((s) == TCPS_CLOSE_WAIT || ((s) >= TCPS_CLOSING && (s) != TCPS_FIN_WAIT_2))
 
 #ifdef	TCPOUTFLAGS
 /*