*** ../../vanilla3.0/tcp_timer.c	Tue Apr 28 10:28:02 1998
--- tcp_timer.c	Tue Sep 15 15:59:24 1998
***************
*** 12,18 ****
   */
  
  /*
!  * Copyright (c) 1982, 1986, 1988, 1990, 1993, 1995
   *	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, 1988, 1990, 1993, 1995, 1998
   *	The Regents of the University of California.  All rights reserved.
   *
   * Redistribution and use in source and binary forms, with or without
***************
*** 217,222 ****
--- 217,242 ----
  	int timer;
  {
  	register int rexmt;
+ #ifdef SACK
+ 	struct sackhole *p, *q;
+ 	/*
+ 	 * Free SACK holes for 2MSL and REXMT timers.
+ 	 */
+ 	if (timer == TCPT_2MSL || timer == TCPT_REXMT) {
+ 		q = p = tp->snd_holes;
+ 		while (p != 0) {
+ 			q = p->next;
+ 			free(p, M_PCB);
+ 			p = q;
+ 		}
+ 		tp->snd_holes = 0;
+ #if defined(SACK) && defined(FACK)
+ 		tp->snd_fack = tp->snd_una;
+ 		tp->retran_data = 0;
+ 		tp->snd_awnd = 0;
+ #endif /* FACK */
+ 	}
+ #endif /* SACK */
  
  	switch (timer) {