freetdm: Initial fix attempt for libpri. It will now load and work. More…

freetdm: Initial fix attempt for libpri.  It will now load and work.  More testing will be required, I got the feeling some event will clean a channel / span of it value when there is timer still active.

libs/freetdm/src/ftdm_io.c

@@ -1841,6 +1841,8 @@ FT_DECLARE(ftdm_status_t) ftdm_channel_open(uint32_t span_id, uint32_t chan_id,
 	    ||
 	    chan_is_avail(check)
 	    ||
+	    (check->type == FTDM_CHAN_TYPE_DQ921 && ftdm_test_flag(check, FTDM_CHANNEL_CONFIGURED) && ftdm_test_flag(check, FTDM_CHANNEL_READY))
+	    ||
 	    may_be_available) {
 		if (!ftdm_test_flag(check, FTDM_CHANNEL_OPEN)) {
 			status = check->fio->open(check);

libs/freetdm/src/ftmod/ftmod_libpri/ftmod_libpri.c

@@ -1133,7 +1133,9 @@ static void *ftdm_libpri_run(ftdm_thread_t *me, void *obj)
 		}
 
 		ftdm_log(FTDM_LOG_CRIT, "PRI down on span %d\n", isdn_data->spri.span->span_id);
-		isdn_data->spri.dchan->state = FTDM_CHANNEL_STATE_DOWN;
+		if (isdn_data->spri.dchan) {
+			isdn_data->spri.dchan->state = FTDM_CHANNEL_STATE_DOWN;
+		}
 
 		if (!down) {
 			ftdm_set_state_all(span, FTDM_CHANNEL_STATE_RESTART);

libs/freetdm/src/ftmod/ftmod_libpri/lpwrap_pri.c

@@ -177,7 +177,7 @@ int lpwrap_init_pri(struct lpwrap_pri *spri, ftdm_span_t *span, ftdm_channel_t *
 	spri->dchan = dchan;
 	spri->span = span;
 
-	if ((spri->pri = pri_new_cb(spri->dchan->sockfd, node, swtype, __pri_lpwrap_read, __pri_lpwrap_write, spri))){
+	if (spri->dchan && (spri->pri = pri_new_cb(spri->dchan->sockfd, node, swtype, __pri_lpwrap_read, __pri_lpwrap_write, spri))){
 		unsigned char buf[4] = { 0 };
 		size_t buflen = sizeof(buf), len = 0;
 		pri_set_debug(spri->pri, debug);