fix for MODENDP-88 (too many dchans on a span)

git-svn-id: http://svn.openzap.org/svn/openzap/trunk@413 a93c3328-9c30-0410-af19-c9cd2b2d52af

libs/freetdm/src/zap_isdn.c

@@ -718,9 +718,14 @@ zap_status_t zap_isdn_configure_span(zap_span_t *span, Q921NetUser_t mode, Q931D
 	
 	for(i = 1; i <= span->chan_count; i++) {
 		if (span->channels[i].type == ZAP_CHAN_TYPE_DQ921) {
-			if (zap_channel_open(span->span_id, i, &dchans[x]) == ZAP_SUCCESS) {
-				zap_log(ZAP_LOG_DEBUG, "opening d-channel #%d %d:%d\n", x, dchans[x]->span_id, dchans[x]->chan_id);
-				x++;
+			if (x > 1) {
+				snprintf(span->last_error, sizeof(span->last_error), "Span has more than 2 D-Channels!");
+				return ZAP_FAIL;
+			} else {
+				if (zap_channel_open(span->span_id, i, &dchans[x]) == ZAP_SUCCESS) {
+					zap_log(ZAP_LOG_DEBUG, "opening d-channel #%d %d:%d\n", x, dchans[x]->span_id, dchans[x]->chan_id);
+					x++;
+				}
 			}
 		}
 	}