577 lines
10 KiB
C
577 lines
10 KiB
C
/*
|
|
*
|
|
* ===================================
|
|
* HARP | Host ATM Research Platform
|
|
* ===================================
|
|
*
|
|
*
|
|
* This Host ATM Research Platform ("HARP") file (the "Software") is
|
|
* made available by Network Computing Services, Inc. ("NetworkCS")
|
|
* "AS IS". NetworkCS does not provide maintenance, improvements or
|
|
* support of any kind.
|
|
*
|
|
* NETWORKCS MAKES NO WARRANTIES OR REPRESENTATIONS, EXPRESS OR IMPLIED,
|
|
* INCLUDING, BUT NOT LIMITED TO, IMPLIED WARRANTIES OF MERCHANTABILITY
|
|
* AND FITNESS FOR A PARTICULAR PURPOSE, AS TO ANY ELEMENT OF THE
|
|
* SOFTWARE OR ANY SUPPORT PROVIDED IN CONNECTION WITH THIS SOFTWARE.
|
|
* In no event shall NetworkCS be responsible for any damages, including
|
|
* but not limited to consequential damages, arising from or relating to
|
|
* any use of the Software or related support.
|
|
*
|
|
* Copyright 1994-1998 Network Computing Services, Inc.
|
|
*
|
|
* Copies of this Software may be made, however, the above copyright
|
|
* notice must be reproduced on all copies.
|
|
*
|
|
* @(#) $Id: sscop_timer.c,v 1.2 1998/09/17 09:35:01 phk Exp $
|
|
*
|
|
*/
|
|
|
|
/*
|
|
* ATM Forum UNI Support
|
|
* ---------------------
|
|
*
|
|
* SSCOP - Timer processing
|
|
*
|
|
*/
|
|
|
|
#include <netatm/kern_include.h>
|
|
|
|
#include <netatm/uni/uni.h>
|
|
#include <netatm/uni/sscop.h>
|
|
#include <netatm/uni/sscop_misc.h>
|
|
#include <netatm/uni/sscop_pdu.h>
|
|
#include <netatm/uni/sscop_var.h>
|
|
|
|
#ifndef lint
|
|
__RCSID("@(#) $Id: sscop_timer.c,v 1.2 1998/09/17 09:35:01 phk Exp $");
|
|
#endif
|
|
|
|
|
|
/*
|
|
* Local functions
|
|
*/
|
|
static void sscop_poll_expire __P((struct sscop *));
|
|
static void sscop_noresponse_expire __P((struct sscop *));
|
|
static void sscop_cc_expire __P((struct sscop *));
|
|
static void sscop_idle_expire __P((struct sscop *));
|
|
|
|
/*
|
|
* Local variables
|
|
*/
|
|
static void (*sscop_expired[SSCOP_T_NUM]) __P((struct sscop *)) = {
|
|
sscop_poll_expire,
|
|
sscop_noresponse_expire,
|
|
sscop_cc_expire,
|
|
sscop_idle_expire
|
|
};
|
|
|
|
|
|
/*
|
|
* Process an SSCOP timer tick
|
|
*
|
|
* This function is called SSCOP_HZ times a second in order to update
|
|
* all of the sscop connection timers. The sscop expiration function
|
|
* will be called to process all timer expirations.
|
|
*
|
|
* Called at splnet.
|
|
*
|
|
* Arguments:
|
|
* tip pointer to sscop timer control block
|
|
*
|
|
* Returns:
|
|
* none
|
|
*
|
|
*/
|
|
void
|
|
sscop_timeout(tip)
|
|
struct atm_time *tip;
|
|
{
|
|
struct sscop *sop, **sprev;
|
|
int i;
|
|
|
|
|
|
/*
|
|
* Schedule next timeout
|
|
*/
|
|
atm_timeout(&sscop_timer, ATM_HZ/SSCOP_HZ, sscop_timeout);
|
|
|
|
/*
|
|
* Run through all connections, updating each active timer.
|
|
* If an expired timer is found, notify that entry.
|
|
*/
|
|
sprev = &sscop_head;
|
|
while (sop = *sprev) {
|
|
|
|
/*
|
|
* Check out each timer
|
|
*/
|
|
for (i =0; i < SSCOP_T_NUM; i++) {
|
|
|
|
/*
|
|
* Decrement timer if it's active
|
|
*/
|
|
if (sop->so_timer[i] && (--sop->so_timer[i] == 0)) {
|
|
|
|
#ifdef DIAGNOSTIC
|
|
{
|
|
static char *tn[] = {
|
|
"POLL",
|
|
"NORESPONSE",
|
|
"CC",
|
|
"IDLE"
|
|
};
|
|
ATM_DEBUG3("sscop_timer: %s expired, sop=%p, state=%d\n",
|
|
tn[i], sop, sop->so_state);
|
|
}
|
|
#endif
|
|
|
|
/*
|
|
* Expired timer - process it
|
|
*/
|
|
(*sscop_expired[i])(sop);
|
|
|
|
/*
|
|
* Make sure connection still exists
|
|
*/
|
|
if (*sprev != sop)
|
|
break;
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Update previous pointer if current control
|
|
* block wasn't deleted
|
|
*/
|
|
if (*sprev == sop)
|
|
sprev = &sop->so_next;
|
|
}
|
|
}
|
|
|
|
|
|
/*
|
|
* Process an SSCOP Timer_POLL expiration
|
|
*
|
|
* Arguments:
|
|
* sop pointer to sscop connection control block
|
|
*
|
|
* Returns:
|
|
* none
|
|
*
|
|
*/
|
|
static void
|
|
sscop_poll_expire(sop)
|
|
struct sscop *sop;
|
|
{
|
|
|
|
/*
|
|
* Validate current state
|
|
*/
|
|
if ((sop->so_state != SOS_READY) &&
|
|
((sop->so_state != SOS_INRESYN) ||
|
|
(sop->so_vers != SSCOP_VERS_QSAAL))) {
|
|
log(LOG_ERR, "sscop: invalid %s state: sop=%p, state=%d\n",
|
|
"Timer_POLL", sop, sop->so_state);
|
|
return;
|
|
}
|
|
|
|
/*
|
|
* Send next poll along its way
|
|
*/
|
|
SEQ_INCR(sop->so_pollsend, 1);
|
|
(void) sscop_send_poll(sop);
|
|
|
|
/*
|
|
* Reset data counter for this poll cycle
|
|
*/
|
|
sop->so_polldata = 0;
|
|
|
|
/*
|
|
* Reset polling timer
|
|
*/
|
|
sscop_set_poll(sop);
|
|
|
|
return;
|
|
}
|
|
|
|
|
|
/*
|
|
* Process an SSCOP Timer_IDLE expiration
|
|
*
|
|
* Arguments:
|
|
* sop pointer to sscop connection control block
|
|
*
|
|
* Returns:
|
|
* none
|
|
*
|
|
*/
|
|
static void
|
|
sscop_idle_expire(sop)
|
|
struct sscop *sop;
|
|
{
|
|
|
|
/*
|
|
* Timer_IDLE only valid in READY state
|
|
*/
|
|
if (sop->so_state != SOS_READY) {
|
|
log(LOG_ERR, "sscop: invalid %s state: sop=%p, state=%d\n",
|
|
"Timer_IDLE", sop, sop->so_state);
|
|
return;
|
|
}
|
|
|
|
/*
|
|
* Send next poll along its way
|
|
*/
|
|
SEQ_INCR(sop->so_pollsend, 1);
|
|
(void) sscop_send_poll(sop);
|
|
|
|
/*
|
|
* Reset data counter for this poll cycle
|
|
*/
|
|
sop->so_polldata = 0;
|
|
|
|
/*
|
|
* Start NO-RESPONSE timer
|
|
*/
|
|
sop->so_timer[SSCOP_T_NORESP] = sop->so_parm.sp_timeresp;
|
|
|
|
/*
|
|
* Reset polling timer
|
|
*/
|
|
sscop_set_poll(sop);
|
|
|
|
return;
|
|
}
|
|
|
|
|
|
/*
|
|
* Process an SSCOP Timer_NORESPONSE expiration
|
|
*
|
|
* Arguments:
|
|
* sop pointer to sscop connection control block
|
|
*
|
|
* Returns:
|
|
* none
|
|
*
|
|
*/
|
|
static void
|
|
sscop_noresponse_expire(sop)
|
|
struct sscop *sop;
|
|
{
|
|
int err;
|
|
|
|
/*
|
|
* Validate current state
|
|
*/
|
|
if ((sop->so_state != SOS_READY) &&
|
|
((sop->so_state != SOS_INRESYN) ||
|
|
(sop->so_vers != SSCOP_VERS_QSAAL))) {
|
|
log(LOG_ERR, "sscop: invalid %s state: sop=%p, state=%d\n",
|
|
"Timer_NORESPONSE", sop, sop->so_state);
|
|
return;
|
|
}
|
|
|
|
/*
|
|
* Peer seems to be dead, so terminate session
|
|
*/
|
|
STACK_CALL(SSCOP_RELEASE_IND, sop->so_upper,
|
|
sop->so_toku, sop->so_connvc,
|
|
SSCOP_UU_NULL, SSCOP_SOURCE_SSCOP, err);
|
|
if (err) {
|
|
/*
|
|
* Error, force retry
|
|
*/
|
|
sop->so_timer[SSCOP_T_NORESP] = 1;
|
|
return;
|
|
}
|
|
|
|
/*
|
|
* Stop data transfer timers
|
|
*/
|
|
sop->so_timer[SSCOP_T_POLL] = 0;
|
|
sop->so_timer[SSCOP_T_IDLE] = 0;
|
|
sop->so_flags &= ~SOF_KEEPALIVE;
|
|
|
|
/*
|
|
* Notify peer of termination
|
|
*/
|
|
(void) sscop_send_end(sop, SSCOP_SOURCE_SSCOP);
|
|
|
|
/*
|
|
* Report peer's failure
|
|
*/
|
|
sscop_maa_error(sop, 'P');
|
|
|
|
if (sop->so_vers == SSCOP_VERS_QSAAL)
|
|
/*
|
|
* Clear connection data
|
|
*/
|
|
qsaal1_clear_connection(sop);
|
|
else
|
|
/*
|
|
* Clear out appropriate queues
|
|
*/
|
|
q2110_prep_retrieve(sop);
|
|
|
|
/*
|
|
* Return to IDLE state
|
|
*/
|
|
sop->so_state = SOS_IDLE;
|
|
|
|
return;
|
|
}
|
|
|
|
|
|
/*
|
|
* Process an SSCOP Timer_CC expiration
|
|
*
|
|
* Arguments:
|
|
* sop pointer to sscop connection control block
|
|
*
|
|
* Returns:
|
|
* none
|
|
*
|
|
*/
|
|
static void
|
|
sscop_cc_expire(sop)
|
|
struct sscop *sop;
|
|
{
|
|
int err;
|
|
|
|
/*
|
|
* Process timeout based on protocol state
|
|
*/
|
|
switch (sop->so_state) {
|
|
|
|
case SOS_OUTCONN:
|
|
/*
|
|
* No response to our BGN yet
|
|
*/
|
|
if (sop->so_connctl < sop->so_parm.sp_maxcc) {
|
|
|
|
/*
|
|
* Send another BGN PDU
|
|
*/
|
|
sop->so_connctl++;
|
|
(void) sscop_send_bgn(sop, SSCOP_SOURCE_USER);
|
|
|
|
/*
|
|
* Restart retransmit timer
|
|
*/
|
|
sop->so_timer[SSCOP_T_CC] = sop->so_parm.sp_timecc;
|
|
|
|
} else {
|
|
|
|
/*
|
|
* Retransmit limit exceeded, terminate session
|
|
*/
|
|
STACK_CALL(SSCOP_RELEASE_IND, sop->so_upper,
|
|
sop->so_toku, sop->so_connvc,
|
|
SSCOP_UU_NULL, SSCOP_SOURCE_SSCOP, err);
|
|
if (err) {
|
|
/*
|
|
* Error, force retry
|
|
*/
|
|
sop->so_timer[SSCOP_T_CC] = 1;
|
|
break;
|
|
}
|
|
|
|
/*
|
|
* Notify peer of termination
|
|
*/
|
|
(void) sscop_send_end(sop, SSCOP_SOURCE_SSCOP);
|
|
|
|
/*
|
|
* Report establishment failure
|
|
*/
|
|
sscop_maa_error(sop, 'O');
|
|
|
|
/*
|
|
* Clear reestablishment flag
|
|
*/
|
|
sop->so_flags &= ~SOF_REESTAB;
|
|
|
|
/*
|
|
* Return to IDLE state
|
|
*/
|
|
sop->so_state = SOS_IDLE;
|
|
}
|
|
break;
|
|
|
|
case SOS_OUTDISC:
|
|
/*
|
|
* No response to our END yet
|
|
*/
|
|
if (sop->so_connctl < sop->so_parm.sp_maxcc) {
|
|
|
|
/*
|
|
* Send another END PDU
|
|
*/
|
|
sop->so_connctl++;
|
|
(void) sscop_send_end(sop, SSCOP_SOURCE_LAST);
|
|
|
|
/*
|
|
* Restart retransmit timer
|
|
*/
|
|
sop->so_timer[SSCOP_T_CC] = sop->so_parm.sp_timecc;
|
|
|
|
} else {
|
|
|
|
/*
|
|
* Retransmit limit exceeded, force session termination
|
|
*/
|
|
STACK_CALL(SSCOP_RELEASE_CNF, sop->so_upper,
|
|
sop->so_toku, sop->so_connvc, 0, 0, err);
|
|
if (err) {
|
|
/*
|
|
* Error, force retry
|
|
*/
|
|
sop->so_timer[SSCOP_T_CC] = 1;
|
|
break;
|
|
}
|
|
|
|
/*
|
|
* Report establishment failure
|
|
*/
|
|
sscop_maa_error(sop, 'O');
|
|
|
|
/*
|
|
* Return to IDLE state
|
|
*/
|
|
sop->so_state = SOS_IDLE;
|
|
}
|
|
break;
|
|
|
|
case SOS_OUTRESYN:
|
|
rexmitrs:
|
|
/*
|
|
* No response to our RS yet
|
|
*/
|
|
if (sop->so_connctl < sop->so_parm.sp_maxcc) {
|
|
|
|
/*
|
|
* Send another RS PDU
|
|
*/
|
|
sop->so_connctl++;
|
|
(void) sscop_send_rs(sop);
|
|
|
|
/*
|
|
* Restart retransmit timer
|
|
*/
|
|
sop->so_timer[SSCOP_T_CC] = sop->so_parm.sp_timecc;
|
|
|
|
} else {
|
|
|
|
/*
|
|
* Retransmit limit exceeded, terminate session
|
|
*/
|
|
STACK_CALL(SSCOP_RELEASE_IND, sop->so_upper,
|
|
sop->so_toku, sop->so_connvc,
|
|
SSCOP_UU_NULL, SSCOP_SOURCE_SSCOP, err);
|
|
if (err) {
|
|
/*
|
|
* Error, force retry
|
|
*/
|
|
sop->so_timer[SSCOP_T_CC] = 1;
|
|
break;
|
|
}
|
|
|
|
/*
|
|
* Notify peer of termination
|
|
*/
|
|
(void) sscop_send_end(sop, SSCOP_SOURCE_SSCOP);
|
|
|
|
/*
|
|
* Report establishment failure
|
|
*/
|
|
sscop_maa_error(sop, 'O');
|
|
|
|
if (sop->so_vers == SSCOP_VERS_QSAAL)
|
|
/*
|
|
* Clear connection data
|
|
*/
|
|
qsaal1_clear_connection(sop);
|
|
|
|
/*
|
|
* Return to IDLE state
|
|
*/
|
|
sop->so_state = SOS_IDLE;
|
|
}
|
|
break;
|
|
|
|
case SOS_CONRESYN: /* Q.SAAL1 */
|
|
#if (SOS_OUTRECOV != SOS_CONRESYN)
|
|
case SOS_OUTRECOV: /* Q.2110 */
|
|
#endif
|
|
if (sop->so_vers == SSCOP_VERS_QSAAL) {
|
|
/*
|
|
* Handle timeout for SOS_CONRESYN
|
|
*/
|
|
goto rexmitrs;
|
|
}
|
|
|
|
/*
|
|
* Handle timeout for SOS_OUTRECOV
|
|
*/
|
|
|
|
/*
|
|
* No response to our ER yet
|
|
*/
|
|
if (sop->so_connctl < sop->so_parm.sp_maxcc) {
|
|
|
|
/*
|
|
* Send another ER PDU
|
|
*/
|
|
sop->so_connctl++;
|
|
(void) sscop_send_er(sop);
|
|
|
|
/*
|
|
* Restart retransmit timer
|
|
*/
|
|
sop->so_timer[SSCOP_T_CC] = sop->so_parm.sp_timecc;
|
|
|
|
} else {
|
|
|
|
/*
|
|
* Retransmit limit exceeded, terminate session
|
|
*/
|
|
STACK_CALL(SSCOP_RELEASE_IND, sop->so_upper,
|
|
sop->so_toku, sop->so_connvc,
|
|
SSCOP_UU_NULL, SSCOP_SOURCE_SSCOP, err);
|
|
if (err) {
|
|
/*
|
|
* Error, force retry
|
|
*/
|
|
sop->so_timer[SSCOP_T_CC] = 1;
|
|
break;
|
|
}
|
|
|
|
/*
|
|
* Notify peer of termination
|
|
*/
|
|
(void) sscop_send_end(sop, SSCOP_SOURCE_SSCOP);
|
|
|
|
/*
|
|
* Report establishment failure
|
|
*/
|
|
sscop_maa_error(sop, 'O');
|
|
|
|
/*
|
|
* Clear receiver buffer
|
|
*/
|
|
sscop_rcvr_drain(sop);
|
|
|
|
/*
|
|
* Return to IDLE state
|
|
*/
|
|
sop->so_state = SOS_IDLE;
|
|
}
|
|
break;
|
|
|
|
default:
|
|
log(LOG_ERR, "sscop: invalid %s state: sop=%p, state=%d\n",
|
|
"Timer_CC", sop, sop->so_state);
|
|
}
|
|
}
|
|
|