freetdm: core - lock the channel on ftdm_channel_read_event()

         ftmod_zt - not locking the channel on zt_channel_next_event(), minor changes

libs/freetdm/src/ftdm_io.c

@@ -1142,14 +1142,17 @@ FT_DECLARE(ftdm_status_t) ftdm_channel_read_event(ftdm_channel_t *ftdmchan, ftdm
 	ftdm_span_t *span = ftdmchan->span;
 	ftdm_assert_return(span->fio != NULL, FTDM_FAIL, "No I/O module attached to this span!\n");
 
+	ftdm_channel_lock(ftdmchan);
+
 	if (!span->fio->channel_next_event) {
 		ftdm_log(FTDM_LOG_ERROR, "channel_next_event method not implemented in module %s!", span->fio->name);
-		return FTDM_NOTIMPL;
+		status = FTDM_NOTIMPL;
+		goto done;
 	}
 
 	status = span->fio->channel_next_event(ftdmchan, event);
 	if (status != FTDM_SUCCESS) {
-		return status;
+		goto done;
 	}
 
 	/* before returning the event to the user we do some core operations with certain OOB events */
@@ -1177,6 +1180,8 @@ FT_DECLARE(ftdm_status_t) ftdm_channel_read_event(ftdm_channel_t *ftdmchan, ftdm
 		break;
 	}
 
+done:
+	ftdm_channel_unlock(ftdmchan);
 	return status;
 }
 

libs/freetdm/src/ftmod/ftmod_zt/ftmod_zt.c

@@ -1007,7 +1007,8 @@ FIO_CHANNEL_NEXT_EVENT_FUNCTION(zt_channel_next_event)
 	if (ftdm_test_flag(ftdmchan, FTDM_CHANNEL_EVENT)) {
 		ftdm_clear_flag(ftdmchan, FTDM_CHANNEL_EVENT);
 		if (ioctl(ftdmchan->sockfd, codes.GETEVENT, &zt_event_id) == -1) {
-			snprintf(span->last_error, sizeof(span->last_error), "%s", strerror(errno));
+			ftdm_log_chan(ftdmchan, FTDM_LOG_ERROR, "Failed retrieving event from channel: %s\n",
+					strerror(errno));
 			return FTDM_FAIL;
 		}
 
@@ -1044,7 +1045,7 @@ FIO_CHANNEL_NEXT_EVENT_FUNCTION(zt_channel_next_event)
 		case ZT_EVENT_RINGOFFHOOK:
 			{
 				if (ftdmchan->type == FTDM_CHAN_TYPE_FXS || (ftdmchan->type == FTDM_CHAN_TYPE_EM && ftdmchan->state != FTDM_CHANNEL_STATE_UP)) {
-					ftdm_set_flag_locked(ftdmchan, FTDM_CHANNEL_OFFHOOK);
+					ftdm_set_flag(ftdmchan, FTDM_CHANNEL_OFFHOOK);
 					event_id = FTDM_OOB_OFFHOOK;
 				} else if (ftdmchan->type == FTDM_CHAN_TYPE_FXO) {
 					event_id = FTDM_OOB_RING_START;
@@ -1076,7 +1077,7 @@ FIO_CHANNEL_NEXT_EVENT_FUNCTION(zt_channel_next_event)
 			break;
 		default:
 			{
-				ftdm_log(FTDM_LOG_WARNING, "Unhandled event %d for %d:%d\n", zt_event_id, span->span_id, i);
+				ftdm_log_chan(ftdmchan, FTDM_LOG_WARNING, "Unhandled event %d for %d:%d\n", zt_event_id, span->span_id, i);
 				event_id = FTDM_OOB_INVALID;
 			}
 			break;