Adding check against garbage in multicast

orchestrator.go

@@ -81,7 +81,16 @@ func (b *AbstractBridge) HierarchyReLocator(entity AbstractMulticast) {
 	re := regexp.MustCompile("[0-9]+")
 
 	for bstNumber := range BstChannel {
-		bstNumber = re.FindAllString(bstNumber, -1)[0]
+
+		cleanStr := re.FindAllString(bstNumber, -1)
+		if cleanStr == nil {
+			log.Println("No numbers in multicast: ", bstNumber)
+			continue
+		} else {
+			log.Println("Extracted numbers in multicast: ", cleanStr)
+			bstNumber = cleanStr[0]
+		}
+
 		brdNumber, err := strconv.ParseInt(bstNumber, 10, 64)
 		if err != nil {
 			log.Println("Garbage received on multicast: ", bstNumber)