*** ../../vanilla3.0/in_proto.c	Tue Apr 28 10:28:02 1998
--- in_proto.c	Tue Sep 15 15:27:36 1998
***************
*** 12,18 ****
   */
  
  /*
!  * Copyright (c) 1982, 1986, 1993
   *	The Regents of the University of California.  All rights reserved.
   *
   * Redistribution and use in source and binary forms, with or without
--- 12,18 ----
   */
  
  /*
!  * Copyright (c) 1982, 1986, 1993, 1998
   *	The Regents of the University of California.  All rights reserved.
   *
   * Redistribution and use in source and binary forms, with or without
***************
*** 334,339 ****
--- 334,340 ----
  int	tcp_conntimeo = TCPTV_KEEP_INIT;	/* initial connection timeout */
  int	tcp_pmtu = 1;			/* Enable path MTU discovery code */
  int	tcp_43maxseg = 0;		/* Always use mtu of local interface */
+ int 	tcp_do_sack = 1;		/* Whether or not SACKs on by default */
  /*
   * These are the maximum useful ages for discovered Path MTU info,
   * and probed Path MTU info.  These values are in seconds.