mirror of
https://github.com/strukturag/nextcloud-spreed-signaling
synced 2024-06-28 10:20:16 +02:00
95d5e50705
Previously there was a difference in the events being received by other sessions for the clustered case compared to the single-server case. Now the events / ordering are the same for both cases.
192 lines
5.5 KiB
Go
192 lines
5.5 KiB
Go
/**
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* Standalone signaling server for the Nextcloud Spreed app.
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* Copyright (C) 2022 struktur AG
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*
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* @author Joachim Bauch <bauch@struktur.de>
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*
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* @license GNU AGPL version 3 or any later version
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU Affero General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU Affero General Public License for more details.
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*
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* You should have received a copy of the GNU Affero General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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package signaling
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import (
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"context"
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"crypto/sha256"
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"encoding/hex"
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"errors"
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"fmt"
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"log"
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"net"
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"os"
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"github.com/dlintw/goconf"
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"google.golang.org/grpc"
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"google.golang.org/grpc/codes"
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status "google.golang.org/grpc/status"
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)
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var (
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GrpcServerId string
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)
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func init() {
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RegisterGrpcServerStats()
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hostname, err := os.Hostname()
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if err != nil {
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hostname = newRandomString(8)
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}
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md := sha256.New()
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md.Write([]byte(fmt.Sprintf("%s-%s-%d", newRandomString(32), hostname, os.Getpid())))
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GrpcServerId = hex.EncodeToString(md.Sum(nil))
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}
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type GrpcServer struct {
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UnimplementedRpcInternalServer
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UnimplementedRpcMcuServer
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UnimplementedRpcSessionsServer
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conn *grpc.Server
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listener net.Listener
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serverId string // can be overwritten from tests
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hub *Hub
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}
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func NewGrpcServer(config *goconf.ConfigFile) (*GrpcServer, error) {
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var listener net.Listener
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if addr, _ := config.GetString("grpc", "listen"); addr != "" {
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var err error
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listener, err = net.Listen("tcp", addr)
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if err != nil {
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return nil, fmt.Errorf("could not create GRPC listener %s: %w", addr, err)
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}
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}
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creds, err := NewReloadableCredentials(config, true)
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if err != nil {
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return nil, err
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}
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conn := grpc.NewServer(grpc.Creds(creds))
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result := &GrpcServer{
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conn: conn,
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listener: listener,
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serverId: GrpcServerId,
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}
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RegisterRpcInternalServer(conn, result)
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RegisterRpcSessionsServer(conn, result)
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RegisterRpcMcuServer(conn, result)
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return result, nil
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}
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func (s *GrpcServer) Run() error {
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if s.listener == nil {
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return nil
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}
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return s.conn.Serve(s.listener)
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}
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func (s *GrpcServer) Close() {
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s.conn.GracefulStop()
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}
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func (s *GrpcServer) LookupSessionId(ctx context.Context, request *LookupSessionIdRequest) (*LookupSessionIdReply, error) {
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statsGrpcServerCalls.WithLabelValues("LookupSessionId").Inc()
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// TODO: Remove debug logging
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log.Printf("Lookup session id for room session id %s", request.RoomSessionId)
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sid, err := s.hub.roomSessions.GetSessionId(request.RoomSessionId)
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if errors.Is(err, ErrNoSuchRoomSession) {
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return nil, status.Error(codes.NotFound, "no such room session id")
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} else if err != nil {
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return nil, err
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}
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if sid != "" && request.DisconnectReason != "" {
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if session := s.hub.GetSessionByPublicId(sid); session != nil {
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log.Printf("Closing session %s because same room session %s connected", session.PublicId(), request.RoomSessionId)
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session.LeaveRoom(false)
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switch sess := session.(type) {
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case *ClientSession:
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if client := sess.GetClient(); client != nil {
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client.SendByeResponseWithReason(nil, "room_session_reconnected")
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}
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}
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session.Close()
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}
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}
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return &LookupSessionIdReply{
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SessionId: sid,
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}, nil
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}
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func (s *GrpcServer) IsSessionInCall(ctx context.Context, request *IsSessionInCallRequest) (*IsSessionInCallReply, error) {
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statsGrpcServerCalls.WithLabelValues("IsSessionInCall").Inc()
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// TODO: Remove debug logging
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log.Printf("Check if session %s is in call %s on %s", request.SessionId, request.RoomId, request.BackendUrl)
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session := s.hub.GetSessionByPublicId(request.SessionId)
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if session == nil {
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return nil, status.Error(codes.NotFound, "no such session id")
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}
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result := &IsSessionInCallReply{}
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room := session.GetRoom()
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if room == nil || room.Id() != request.GetRoomId() || room.Backend().url != request.GetBackendUrl() ||
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(session.ClientType() != HelloClientTypeInternal && !room.IsSessionInCall(session)) {
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// Recipient is not in a room, a different room or not in the call.
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result.InCall = false
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} else {
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result.InCall = true
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}
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return result, nil
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}
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func (s *GrpcServer) GetPublisherId(ctx context.Context, request *GetPublisherIdRequest) (*GetPublisherIdReply, error) {
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statsGrpcServerCalls.WithLabelValues("GetPublisherId").Inc()
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// TODO: Remove debug logging
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log.Printf("Get %s publisher id for session %s", request.StreamType, request.SessionId)
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session := s.hub.GetSessionByPublicId(request.SessionId)
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if session == nil {
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return nil, status.Error(codes.NotFound, "no such session")
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}
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clientSession, ok := session.(*ClientSession)
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if !ok {
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return nil, status.Error(codes.NotFound, "no such session")
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}
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publisher := clientSession.GetOrWaitForPublisher(ctx, request.StreamType)
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if publisher, ok := publisher.(*mcuProxyPublisher); ok {
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reply := &GetPublisherIdReply{
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PublisherId: publisher.Id(),
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ProxyUrl: publisher.conn.rawUrl,
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}
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if ip := publisher.conn.ip; ip != nil {
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reply.Ip = ip.String()
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}
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return reply, nil
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}
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return nil, status.Error(codes.NotFound, "no such publisher")
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}
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func (s *GrpcServer) GetServerId(ctx context.Context, request *GetServerIdRequest) (*GetServerIdReply, error) {
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statsGrpcServerCalls.WithLabelValues("GetServerId").Inc()
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return &GetServerIdReply{
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ServerId: s.serverId,
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}, nil
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}
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