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Asterisk is getting a "No D-channels available!" warning message every 4 seconds.

Browse Source 
For PTP links, libpri generated the PRI_EVENT_DCHAN_DOWN event every time
it failed to bring layer 2 up because the physical layer is down.

For PTP links, made generate the PRI_EVENT_DCHAN_UP/PRI_EVENT_DCHAN_DOWN
only when it enters/exits the Q.921 superstate consisting of states
7(Q921_MULTI_FRAME_ESTABLISHED) and 8(Q921_TIMER_RECOVERY).

Also changed the PTP link restart delay to be link specific instead of D
channel specific because the GR-303 PTP switch types have more than one
Q.921 link.

(closes issue #17270)
Reported by: jmls


git-svn-id: https://origsvn.digium.com/svn/libpri/branches/1.4@2113 2fbb986a-6c06-0410-b554-c9c1f0a7f128
This commit is contained in:
Richard Mudgett 2010-11-12 02:31:24 +00:00
parent 12805eb71f
commit 517e5ac5ce
3 changed files with 80 additions and 35 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
pri_internal.h
View File

@ -119,8 +119,6 @@ struct pri {
int t201_timer;
/*! Number of times T201 has expired. */
int t201_expirycnt;
/*! PTP layer 2 restart delay timer */
int restart_timer;
int cref; /* Next call reference value */

2
pri_q921.h
View File

@ -246,6 +246,8 @@ struct q921_link {
int n202_counter;
/*! Max idle time */
int t203_timer;
/*! PTP restart delay timer */
int restart_timer;
/* MDL variables */
int mdl_timer;

111
q921.c
View File

@ -548,17 +548,18 @@ static void stop_t200(struct q921_link *link)
}
}
static void restart_timer_expire(void *vctrl)
static void restart_timer_expire(void *vlink)
{
struct pri *ctrl = vctrl;
struct q921_link *link;
struct q921_link *link = vlink;
struct pri *ctrl;
ctrl = link->ctrl;
if (ctrl->debug & PRI_DEBUG_Q921_STATE) {
pri_message(ctrl, "Kick starting layer 2\n");
pri_message(ctrl, "SAPI/TEI=%d/%d Kick starting link\n", link->sapi, link->tei);
}
ctrl->restart_timer = 0;
link = &ctrl->link;
link->restart_timer = 0;
switch (link->state) {
case Q921_TEI_ASSIGNED:
@ -570,31 +571,42 @@ static void restart_timer_expire(void *vctrl)
break;
default:
/* Looks like someone forgot to stop the restart timer. */
pri_error(ctrl, "Layer 2 restart delay timer expired in state %d(%s)\n",
link->state, q921_state2str(link->state));
pri_error(ctrl, "SAPI/TEI=%d/%d Link restart delay timer expired in state %d(%s)\n",
link->sapi, link->tei, link->state, q921_state2str(link->state));
break;
}
}
static void restart_timer_stop(struct pri *ctrl)
static void restart_timer_stop(struct q921_link *link)
{
pri_schedule_del(ctrl, ctrl->restart_timer);
ctrl->restart_timer = 0;
struct pri *ctrl;
ctrl = link->ctrl;
pri_schedule_del(ctrl, link->restart_timer);
link->restart_timer = 0;
}
static void restart_timer_start(struct pri *ctrl)
static void restart_timer_start(struct q921_link *link)
{
struct pri *ctrl;
ctrl = link->ctrl;
if (ctrl->debug & PRI_DEBUG_Q921_DUMP) {
pri_message(ctrl, "-- Starting layer 2 restart delay timer\n");
pri_message(ctrl, "SAPI/TEI=%d/%d Starting link restart delay timer\n",
link->sapi, link->tei);
}
pri_schedule_del(ctrl, ctrl->restart_timer);
ctrl->restart_timer =
pri_schedule_event(ctrl, ctrl->timers[PRI_TIMER_T200], restart_timer_expire, ctrl);
pri_schedule_del(ctrl, link->restart_timer);
link->restart_timer =
pri_schedule_event(ctrl, ctrl->timers[PRI_TIMER_T200], restart_timer_expire, link);
}
static pri_event *q921_ptp_delay_restart(struct pri *ctrl)
static pri_event *q921_ptp_delay_restart(struct q921_link *link)
{
pri_event *ev;
struct pri *ctrl;
ctrl = link->ctrl;
if (PTP_MODE(ctrl)) {
/*
@ -602,12 +614,20 @@ static pri_event *q921_ptp_delay_restart(struct pri *ctrl)
* got an L3 that depends on us keeping L2 automatically alive
* and happy for PTP links.
*/
restart_timer_start(ctrl);
restart_timer_start(link);
/* Notify the upper layer that layer 2 is down. */
ctrl->schedev = 1;
ctrl->ev.gen.e = PRI_EVENT_DCHAN_DOWN;
ev = &ctrl->ev;
switch (link->state) {
case Q921_MULTI_FRAME_ESTABLISHED:
case Q921_TIMER_RECOVERY:
/* Notify the upper layer that layer 2 went down. */
ctrl->schedev = 1;
ctrl->ev.gen.e = PRI_EVENT_DCHAN_DOWN;
ev = &ctrl->ev;
break;
default:
ev = NULL;
break;
}
} else {
ev = NULL;
}
@ -817,6 +837,10 @@ static void t200_expire(void *vlink)
q921_establish_data_link(link);
link->l3_initiated = 0;
q921_setstate(link, Q921_AWAITING_ESTABLISHMENT);
if (PTP_MODE(ctrl)) {
ctrl->schedev = 1;
ctrl->ev.gen.e = PRI_EVENT_DCHAN_DOWN;
}
}
break;
case Q921_AWAITING_ESTABLISHMENT:
@ -825,12 +849,12 @@ static void t200_expire(void *vlink)
q921_send_sabme(link);
start_t200(link);
} else {
q921_ptp_delay_restart(link);
q921_discard_iqueue(link);
q921_mdl_error(link, 'G');
q921_setstate(link, Q921_TEI_ASSIGNED);
/* DL-RELEASE indication */
q931_dl_event(link, Q931_DL_EVENT_DL_RELEASE_IND);
q921_ptp_delay_restart(ctrl);
}
break;
case Q921_AWAITING_RELEASE:
@ -839,11 +863,11 @@ static void t200_expire(void *vlink)
q921_send_disc(link, 1);
start_t200(link);
} else {
q921_ptp_delay_restart(link);
q921_mdl_error(link, 'H');
/* DL-RELEASE confirm */
q931_dl_event(link, Q931_DL_EVENT_DL_RELEASE_CONFIRM);
q921_setstate(link, Q921_TEI_ASSIGNED);
q921_ptp_delay_restart(ctrl);
}
break;
default:
@ -943,7 +967,7 @@ int q921_transmit_iframe(struct q921_link *link, void *buf, int len, int cr)
switch (link->state) {
case Q921_TEI_ASSIGNED:
/* If we aren't in a state compatiable with DL-DATA requests, start getting us there here */
restart_timer_stop(ctrl);
restart_timer_stop(link);
q921_establish_data_link(link);
link->l3_initiated = 1;
q921_setstate(link, Q921_AWAITING_ESTABLISHMENT);
@ -1666,7 +1690,7 @@ static pri_event *q921_sabme_rx(struct q921_link *link, q921_h *h)
}
break;
case Q921_TEI_ASSIGNED:
restart_timer_stop(ctrl);
restart_timer_stop(link);
q921_send_ua(link, h->u.p_f);
q921_clear_exception_conditions(link);
link->v_s = link->v_a = link->v_r = 0;
@ -1719,6 +1743,7 @@ static pri_event *q921_disc_rx(struct q921_link *link, q921_h *h)
break;
case Q921_MULTI_FRAME_ESTABLISHED:
case Q921_TIMER_RECOVERY:
res = q921_ptp_delay_restart(link);
q921_discard_iqueue(link);
q921_send_ua(link, h->u.p_f);
/* DL-RELEASE indication */
@ -1727,7 +1752,6 @@ static pri_event *q921_disc_rx(struct q921_link *link, q921_h *h)
if (link->state == Q921_MULTI_FRAME_ESTABLISHED)
stop_t203(link);
q921_setstate(link, Q921_TEI_ASSIGNED);
res = q921_ptp_delay_restart(ctrl);
break;
default:
pri_error(ctrl, "Don't know what to do with DISC in state %d(%s)\n",
@ -1760,7 +1784,7 @@ static void q921_mdl_remove(struct q921_link *link)
switch (link->state) {
case Q921_TEI_ASSIGNED:
restart_timer_stop(ctrl);
restart_timer_stop(link);
/* XXX: deviation! Since we don't have a UI queue, we just discard our I-queue */
q921_discard_iqueue(link);
q921_setstate(link, Q921_TEI_UNASSIGNED);
@ -1906,6 +1930,16 @@ static void q921_mdl_handle_ptp_error(struct q921_link *link, char error)
ctrl = link->ctrl;
switch (error) {
case 'J':
/*
* This is for the transition to Q921_AWAITING_ESTABLISHMENT.
* The event is genereated here rather than where the MDL_ERROR
* 'J' is posted because of the potential event conflict with
* incoming I-frame information passed to Q.931.
*/
ctrl->schedev = 1;
ctrl->ev.gen.e = PRI_EVENT_DCHAN_DOWN;
break;
case 'A':
case 'B':
case 'C':
@ -1915,7 +1949,6 @@ static void q921_mdl_handle_ptp_error(struct q921_link *link, char error)
case 'G':
case 'H':
case 'I':
case 'J':
case 'K':
break;
default:
@ -2122,11 +2155,11 @@ static pri_event *q921_ua_rx(struct q921_link *link, q921_h *h)
if (!h->u.p_f) {
q921_mdl_error(link, 'D');
} else {
res = q921_ptp_delay_restart(link);
/* DL-RELEASE confirm */
q931_dl_event(link, Q931_DL_EVENT_DL_RELEASE_CONFIRM);
stop_t200(link);
q921_setstate(link, Q921_TEI_ASSIGNED);
res = q921_ptp_delay_restart(ctrl);
}
break;
default:
@ -2423,6 +2456,10 @@ static pri_event *q921_frmr_rx(struct q921_link *link, q921_h *h)
q921_establish_data_link(link);
link->l3_initiated = 0;
q921_setstate(link, Q921_AWAITING_ESTABLISHMENT);
if (PTP_MODE(ctrl)) {
ctrl->ev.gen.e = PRI_EVENT_DCHAN_DOWN;
res = &ctrl->ev;
}
break;
case Q921_TEI_ASSIGNED:
case Q921_AWAITING_ESTABLISHMENT:
@ -2558,7 +2595,7 @@ static pri_event *q921_dm_rx(struct q921_link *link, q921_h *h)
if (h->u.p_f)
break;
/* else */
restart_timer_stop(ctrl);
restart_timer_stop(link);
q921_establish_data_link(link);
link->l3_initiated = 1;
q921_setstate(link, Q921_AWAITING_ESTABLISHMENT);
@ -2567,21 +2604,21 @@ static pri_event *q921_dm_rx(struct q921_link *link, q921_h *h)
if (!h->u.p_f)
break;
res = q921_ptp_delay_restart(link);
q921_discard_iqueue(link);
/* DL-RELEASE indication */
q931_dl_event(link, Q931_DL_EVENT_DL_RELEASE_IND);
stop_t200(link);
q921_setstate(link, Q921_TEI_ASSIGNED);
res = q921_ptp_delay_restart(ctrl);
break;
case Q921_AWAITING_RELEASE:
if (!h->u.p_f)
break;
res = q921_ptp_delay_restart(link);
/* DL-RELEASE confirm */
q931_dl_event(link, Q931_DL_EVENT_DL_RELEASE_CONFIRM);
stop_t200(link);
q921_setstate(link, Q921_TEI_ASSIGNED);
res = q921_ptp_delay_restart(ctrl);
break;
case Q921_MULTI_FRAME_ESTABLISHED:
if (h->u.p_f) {
@ -2593,6 +2630,10 @@ static pri_event *q921_dm_rx(struct q921_link *link, q921_h *h)
q921_establish_data_link(link);
link->l3_initiated = 0;
q921_setstate(link, Q921_AWAITING_ESTABLISHMENT);
if (PTP_MODE(ctrl)) {
ctrl->ev.gen.e = PRI_EVENT_DCHAN_DOWN;
res = &ctrl->ev;
}
break;
case Q921_TIMER_RECOVERY:
if (h->u.p_f) {
@ -2603,6 +2644,10 @@ static pri_event *q921_dm_rx(struct q921_link *link, q921_h *h)
q921_establish_data_link(link);
link->l3_initiated = 0;
q921_setstate(link, Q921_AWAITING_ESTABLISHMENT);
if (PTP_MODE(ctrl)) {
ctrl->ev.gen.e = PRI_EVENT_DCHAN_DOWN;
res = &ctrl->ev;
}
break;
default:
pri_error(ctrl, "Don't know what to do with DM frame in state %d(%s)\n",