Check backend when searching for session to use for dialout.

backend_server.go

@@ -685,13 +685,7 @@ func (b *BackendServer) startDialout(roomid string, backend *Backend, request *B
 		return returnDialoutError(http.StatusBadRequest, NewError("invalid_roomid", "The room id must be numeric."))
 	}
 
-	var session *ClientSession
+	session := b.hub.GetDialoutSession(roomid, backend)
-	for s := range b.hub.dialoutSessions {
-		if s.GetClient() != nil {
-			session = s
-			break
-		}
-	}
 	if session == nil {
 		return returnDialoutError(http.StatusNotFound, NewError("no_client_available", "No available client found to trigger dialout."))
 	}

hub.go

@@ -581,6 +581,24 @@ func (h *Hub) GetSessionByPublicId(sessionId string) Session {
 	return session
 }
 
+func (h *Hub) GetDialoutSession(roomId string, backend *Backend) *ClientSession {
+	url := backend.Url()
+
+	h.mu.RLock()
+	defer h.mu.RUnlock()
+	for session := range h.dialoutSessions {
+		if session.backend.Url() != url {
+			continue
+		}
+
+		if session.GetClient() != nil {
+			return session
+		}
+	}
+
+	return nil
+}
+
 func (h *Hub) checkExpiredSessions(now time.Time) {
 	for s := range h.expiredSessions {
 		if s.IsExpired(now) {