freetdm: allow reception of FACILITY msg in any channel state when transparent facility is enabled

libs/freetdm/src/ftmod/ftmod_sangoma_isdn/ftmod_sangoma_isdn_stack_hndl.c

@@ -801,6 +801,23 @@ void sngisdn_process_fac_ind (sngisdn_event_data_t *sngisdn_event)
 
 	ftdm_log_chan(ftdmchan, FTDM_LOG_DEBUG, "Processing FACILITY IND (suId:%u suInstId:%u spInstId:%u)\n", suId, suInstId, spInstId);
 
+	if (signal_data->facility_ie_decode == SNGISDN_OPT_FALSE) {
+		/* If Facility decoding is disabled, we do not care about current call state, just pass event up to user */
+		ftdm_sigmsg_t sigev;
+		if (facEvnt->facElmt.facStr.pres) {
+			get_facility_ie_str(ftdmchan, &facEvnt->facElmt.facStr.val[2], facEvnt->facElmt.facStr.len-2);
+		}
+		memset(&sigev, 0, sizeof(sigev));
+		sigev.chan_id = ftdmchan->chan_id;
+		sigev.span_id = ftdmchan->span_id;
+		sigev.channel = ftdmchan;
+		
+		sigev.event_id = FTDM_SIGEVENT_FACILITY;
+		ftdm_span_send_signal(ftdmchan->span, &sigev);
+		ISDN_FUNC_TRACE_EXIT(__FUNCTION__);
+		return;
+	}
+
 	switch (ftdmchan->state) {
 		case FTDM_CHANNEL_STATE_GET_CALLERID:
 			/* Update the caller ID Name */