128 lines
4.3 KiB
C
128 lines
4.3 KiB
C
/*
|
|
* Copyright (c) Computing Centre, University of British Columbia, 1984
|
|
* Copyright (C) Computer Science Department IV,
|
|
* University of Erlangen-Nuremberg, Germany, 1990, 1992
|
|
* Copyright (c) 1990, 1992, 1993
|
|
* The Regents of the University of California. All rights reserved.
|
|
*
|
|
* This code is derived from software contributed to Berkeley by the
|
|
* Laboratory for Computation Vision and the Computer Science Department
|
|
* of the the University of British Columbia and the Computer Science
|
|
* Department (IV) of the University of Erlangen-Nuremberg, Germany.
|
|
*
|
|
* Redistribution and use in source and binary forms, with or without
|
|
* modification, are permitted provided that the following conditions
|
|
* are met:
|
|
* 1. Redistributions of source code must retain the above copyright
|
|
* notice, this list of conditions and the following disclaimer.
|
|
* 2. Redistributions in binary form must reproduce the above copyright
|
|
* notice, this list of conditions and the following disclaimer in the
|
|
* documentation and/or other materials provided with the distribution.
|
|
* 3. All advertising materials mentioning features or use of this software
|
|
* must display the following acknowledgement:
|
|
* This product includes software developed by the University of
|
|
* California, Berkeley and its contributors.
|
|
* 4. Neither the name of the University nor the names of its contributors
|
|
* may be used to endorse or promote products derived from this software
|
|
* without specific prior written permission.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
|
|
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
|
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
|
|
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
|
|
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
|
|
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
|
|
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
|
|
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
|
|
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
|
|
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
|
|
* SUCH DAMAGE.
|
|
*
|
|
* @(#)pk_timer.c 8.1 (Berkeley) 6/10/93
|
|
* $Id$
|
|
*/
|
|
|
|
#include <sys/param.h>
|
|
#include <sys/systm.h>
|
|
#include <sys/mbuf.h>
|
|
#include <sys/socket.h>
|
|
#include <sys/protosw.h>
|
|
#include <sys/socketvar.h>
|
|
#include <sys/errno.h>
|
|
|
|
#include <net/if.h>
|
|
|
|
#include <netccitt/x25.h>
|
|
#include <netccitt/pk.h>
|
|
#include <netccitt/pk_var.h>
|
|
|
|
/*
|
|
* Various timer values. They can be adjusted
|
|
* by patching the binary with adb if necessary.
|
|
*/
|
|
int pk_t20 = 18 * PR_SLOWHZ; /* restart timer */
|
|
int pk_t21 = 20 * PR_SLOWHZ; /* call timer */
|
|
/* XXX pk_t22 is never used */
|
|
int pk_t22 = 18 * PR_SLOWHZ; /* reset timer */
|
|
int pk_t23 = 18 * PR_SLOWHZ; /* clear timer */
|
|
|
|
pk_timer ()
|
|
{
|
|
register struct pkcb *pkp;
|
|
register struct pklcd *lcp, **pp;
|
|
register int lcns_jammed, cant_restart;
|
|
|
|
FOR_ALL_PKCBS(pkp) {
|
|
switch (pkp -> pk_state) {
|
|
case DTE_SENT_RESTART:
|
|
lcp = pkp -> pk_chan[0];
|
|
/*
|
|
* If restart failures are common, a link level
|
|
* reset should be initiated here.
|
|
*/
|
|
if (lcp -> lcd_timer && --lcp -> lcd_timer == 0) {
|
|
pk_message (0, pkp -> pk_xcp,
|
|
"packet level restart failed");
|
|
pkp -> pk_state = DTE_WAITING;
|
|
}
|
|
break;
|
|
|
|
case DTE_READY:
|
|
lcns_jammed = cant_restart = 0;
|
|
for (pp = &pkp -> pk_chan[1]; pp <= &pkp -> pk_chan[pkp -> pk_maxlcn]; pp++) {
|
|
if ((lcp = *pp) == 0)
|
|
continue;
|
|
switch (lcp -> lcd_state) {
|
|
case SENT_CALL:
|
|
if (--lcp -> lcd_timer == 0) {
|
|
if (lcp -> lcd_so)
|
|
lcp -> lcd_so -> so_error = ETIMEDOUT;
|
|
pk_clear (lcp, 49, 1);
|
|
}
|
|
break;
|
|
|
|
case SENT_CLEAR:
|
|
if (lcp -> lcd_retry >= 3)
|
|
lcns_jammed++;
|
|
else
|
|
if (--lcp -> lcd_timer == 0)
|
|
pk_clear (lcp, 50, 1);
|
|
break;
|
|
|
|
case DATA_TRANSFER: /* lcn active */
|
|
cant_restart++;
|
|
break;
|
|
|
|
case LCN_ZOMBIE: /* zombie state */
|
|
pk_freelcd (lcp);
|
|
break;
|
|
}
|
|
}
|
|
if (lcns_jammed > pkp -> pk_maxlcn / 2 && cant_restart == 0) {
|
|
pk_message (0, pkp -> pk_xcp, "%d lcns jammed: attempting restart", lcns_jammed);
|
|
pk_restart (pkp, 0);
|
|
}
|
|
}
|
|
}
|
|
}
|