2020-10-22 16:54:50 +02:00
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package webrtc
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import (
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"fmt"
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2022-02-09 20:45:03 +00:00
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"net"
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2021-02-14 14:40:17 +01:00
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"strings"
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2022-02-12 18:55:56 +01:00
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"sync/atomic"
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2021-02-25 17:16:37 +01:00
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"time"
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2020-10-22 16:54:50 +02:00
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2022-02-09 20:45:03 +00:00
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"github.com/pion/ice/v2"
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2021-11-28 23:16:26 +01:00
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"github.com/pion/rtcp"
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2021-02-01 23:50:18 +01:00
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"github.com/pion/webrtc/v3"
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2020-10-22 16:54:50 +02:00
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"github.com/rs/zerolog"
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"github.com/rs/zerolog/log"
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2022-07-14 00:58:22 +02:00
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"github.com/demodesk/neko/internal/config"
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"github.com/demodesk/neko/internal/webrtc/cursor"
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"github.com/demodesk/neko/internal/webrtc/pionlog"
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"github.com/demodesk/neko/pkg/types"
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"github.com/demodesk/neko/pkg/types/codec"
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"github.com/demodesk/neko/pkg/types/event"
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"github.com/demodesk/neko/pkg/types/message"
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2020-10-22 16:54:50 +02:00
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)
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2021-02-25 17:16:37 +01:00
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// the duration without network activity before a Agent is considered disconnected. Default is 5 Seconds
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const disconnectedTimeout = 4 * time.Second
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// the duration without network activity before a Agent is considered failed after disconnected. Default is 25 Seconds
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const failedTimeout = 6 * time.Second
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// how often the ICE Agent sends extra traffic if there is no activity, if media is flowing no traffic will be sent. Default is 2 seconds
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const keepAliveInterval = 2 * time.Second
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2022-01-06 20:41:44 +01:00
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// send a PLI on an interval so that the publisher is pushing a keyframe every rtcpPLIInterval
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const rtcpPLIInterval = 3 * time.Second
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2020-11-01 16:09:48 +01:00
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func New(desktop types.DesktopManager, capture types.CaptureManager, config *config.WebRTC) *WebRTCManagerCtx {
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return &WebRTCManagerCtx{
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2022-06-25 20:12:42 +02:00
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logger: log.With().Str("module", "webrtc").Logger(),
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config: config,
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metrics: newMetrics(),
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2021-09-26 22:26:22 +02:00
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desktop: desktop,
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capture: capture,
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curImage: cursor.NewImage(desktop),
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2021-10-21 22:53:54 +02:00
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curPosition: cursor.NewPosition(),
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2020-10-22 16:54:50 +02:00
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}
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}
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2020-11-01 16:09:48 +01:00
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type WebRTCManagerCtx struct {
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2022-06-25 20:12:42 +02:00
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logger zerolog.Logger
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config *config.WebRTC
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metrics *metricsCtx
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peerId int32
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2021-09-26 22:26:22 +02:00
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desktop types.DesktopManager
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capture types.CaptureManager
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curImage *cursor.ImageCtx
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curPosition *cursor.PositionCtx
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2022-01-06 22:28:34 +01:00
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2022-02-09 20:45:03 +00:00
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tcpMux ice.TCPMux
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udpMux ice.UDPMux
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2022-01-06 22:28:34 +01:00
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camStop, micStop *func()
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2020-10-22 16:54:50 +02:00
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}
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2020-11-01 16:09:48 +01:00
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func (manager *WebRTCManagerCtx) Start() {
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2021-08-29 18:59:46 +02:00
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manager.curImage.Start()
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2022-02-09 20:45:03 +00:00
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logger := pionlog.New(manager.logger)
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// add TCP Mux listener
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if manager.config.TCPMux > 0 {
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tcpListener, err := net.ListenTCP("tcp", &net.TCPAddr{
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IP: net.IP{0, 0, 0, 0},
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Port: manager.config.TCPMux,
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})
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if err != nil {
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manager.logger.Panic().Err(err).Msg("unable to setup ice TCP mux")
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}
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manager.tcpMux = webrtc.NewICETCPMux(logger.NewLogger("ice-tcp"), tcpListener, 32)
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}
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// add UDP Mux listener
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if manager.config.UDPMux > 0 {
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udpListener, err := net.ListenUDP("udp", &net.UDPAddr{
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IP: net.IP{0, 0, 0, 0},
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Port: manager.config.UDPMux,
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})
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if err != nil {
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manager.logger.Panic().Err(err).Msg("unable to setup ice UDP mux")
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}
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manager.udpMux = webrtc.NewICEUDPMux(logger.NewLogger("ice-udp"), udpListener)
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}
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2020-10-22 16:54:50 +02:00
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manager.logger.Info().
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2021-08-03 11:06:34 +02:00
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Bool("icelite", manager.config.ICELite).
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Bool("icetrickle", manager.config.ICETrickle).
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Interface("iceservers", manager.config.ICEServers).
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2021-03-17 15:47:49 +01:00
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Str("nat1to1", strings.Join(manager.config.NAT1To1IPs, ",")).
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Str("epr", fmt.Sprintf("%d-%d", manager.config.EphemeralMin, manager.config.EphemeralMax)).
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2022-02-09 20:45:03 +00:00
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Int("tcpmux", manager.config.TCPMux).
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Int("udpmux", manager.config.UDPMux).
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2021-08-03 11:06:34 +02:00
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Msg("webrtc starting")
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2020-10-22 16:54:50 +02:00
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}
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2020-11-01 16:09:48 +01:00
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func (manager *WebRTCManagerCtx) Shutdown() error {
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2021-09-02 00:00:29 +02:00
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manager.logger.Info().Msg("shutdown")
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2021-02-06 12:59:57 +01:00
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2021-02-28 18:37:35 +01:00
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manager.curImage.Shutdown()
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manager.curPosition.Shutdown()
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2020-10-22 16:54:50 +02:00
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return nil
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}
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2021-03-17 15:47:49 +01:00
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func (manager *WebRTCManagerCtx) ICEServers() []types.ICEServer {
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2021-02-02 19:21:48 +01:00
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return manager.config.ICEServers
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}
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2020-10-22 16:54:50 +02:00
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2022-02-10 23:39:52 +01:00
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func (manager *WebRTCManagerCtx) CreatePeer(session types.Session, videoID string) (*webrtc.SessionDescription, error) {
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2022-02-12 18:55:56 +01:00
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id := atomic.AddInt32(&manager.peerId, 1)
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2022-06-25 20:12:42 +02:00
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manager.metrics.NewConnection(session)
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2022-02-12 18:55:56 +01:00
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2021-08-29 18:59:46 +02:00
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// add session id to logger context
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2022-02-12 18:55:56 +01:00
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logger := manager.logger.With().Str("session_id", session.ID()).Int32("peer_id", id).Logger()
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2021-08-29 18:59:46 +02:00
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logger.Info().Msg("creating webrtc peer")
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2021-02-02 20:43:33 +01:00
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2021-09-27 00:50:49 +02:00
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// all audios must have the same codec
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audioStream := manager.capture.Audio()
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2021-09-26 22:26:22 +02:00
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// all videos must have the same codec
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videoStream, ok := manager.capture.Video(videoID)
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if !ok {
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return nil, types.ErrWebRTCVideoNotFound
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2021-03-23 13:46:54 +01:00
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}
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2022-07-03 23:21:25 +02:00
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manager.metrics.SetVideoID(session, videoID)
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2021-09-26 22:59:45 +02:00
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connection, err := manager.newPeerConnection([]codec.RTPCodec{
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2021-09-27 00:50:49 +02:00
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audioStream.Codec(),
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2021-09-26 22:59:45 +02:00
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videoStream.Codec(),
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}, logger)
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2020-10-22 16:54:50 +02:00
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if err != nil {
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2021-02-02 19:21:48 +01:00
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return nil, err
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2020-10-22 16:54:50 +02:00
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}
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2021-09-26 22:26:22 +02:00
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// asynchronously send local ICE Candidates
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2021-02-02 21:12:11 +01:00
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if manager.config.ICETrickle {
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connection.OnICECandidate(func(candidate *webrtc.ICECandidate) {
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if candidate == nil {
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logger.Debug().Msg("all local ice candidates sent")
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return
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}
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2021-02-02 20:43:33 +01:00
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2021-09-01 21:58:39 +02:00
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session.Send(
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event.SIGNAL_CANDIDATE,
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2021-02-02 21:12:11 +01:00
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message.SignalCandidate{
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2021-09-01 21:58:39 +02:00
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ICECandidateInit: candidate.ToJSON(),
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2021-02-02 21:12:11 +01:00
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})
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})
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}
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2021-02-02 20:43:33 +01:00
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2021-09-27 00:50:49 +02:00
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// audio track
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2021-10-01 00:02:54 +02:00
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audioTrack, err := manager.newPeerStreamTrack(audioStream, logger)
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2021-02-06 18:16:24 +01:00
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if err != nil {
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return nil, err
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}
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2021-10-07 21:41:19 +02:00
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if err := audioTrack.AddToConnection(connection); err != nil {
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2021-09-27 00:50:49 +02:00
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return nil, err
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2021-02-14 18:16:24 +01:00
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}
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2021-09-27 00:50:49 +02:00
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// video track
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2021-02-14 14:40:17 +01:00
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2021-10-01 00:02:54 +02:00
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videoTrack, err := manager.newPeerStreamTrack(videoStream, logger)
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2021-02-04 20:39:48 +00:00
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if err != nil {
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return nil, err
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}
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2021-10-07 21:41:19 +02:00
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if err := videoTrack.AddToConnection(connection); err != nil {
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2021-02-04 20:39:48 +00:00
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return nil, err
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}
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2021-09-27 00:50:49 +02:00
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// data channel
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2021-02-12 23:45:16 +01:00
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dataChannel, err := connection.CreateDataChannel("data", nil)
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2021-02-05 17:57:33 +01:00
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if err != nil {
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2021-02-02 19:36:11 +01:00
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return nil, err
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}
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2020-10-22 16:54:50 +02:00
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2021-02-13 18:25:40 +01:00
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peer := &WebRTCPeerCtx{
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2021-08-29 18:59:46 +02:00
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logger: logger,
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2021-02-14 14:40:17 +01:00
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connection: connection,
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dataChannel: dataChannel,
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2021-09-27 00:50:49 +02:00
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changeVideo: func(videoID string) error {
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videoStream, ok := manager.capture.Video(videoID)
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if !ok {
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return types.ErrWebRTCVideoNotFound
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}
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2022-07-03 23:21:25 +02:00
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manager.metrics.SetVideoID(session, videoID)
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2021-09-27 00:50:49 +02:00
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return videoTrack.SetStream(videoStream)
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},
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2022-03-26 23:20:38 +01:00
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setPaused: func(isPaused bool) {
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videoTrack.SetPaused(isPaused)
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audioTrack.SetPaused(isPaused)
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},
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2021-09-27 00:50:49 +02:00
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iceTrickle: manager.config.ICETrickle,
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2021-02-13 18:25:40 +01:00
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}
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2021-11-28 23:16:26 +01:00
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connection.OnTrack(func(track *webrtc.TrackRemote, receiver *webrtc.RTPReceiver) {
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2021-12-09 23:22:24 +01:00
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logger := logger.With().
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2021-12-09 21:48:02 +01:00
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Str("kind", track.Kind().String()).
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2021-12-02 23:06:21 +01:00
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Str("mime", track.Codec().RTPCodecCapability.MimeType).
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2021-12-09 23:22:24 +01:00
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Logger()
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2022-01-06 20:41:44 +01:00
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logger.Info().Msgf("received new remote track")
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2021-12-09 23:22:24 +01:00
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if !session.Profile().CanShareMedia {
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2022-01-06 20:41:44 +01:00
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logger.Warn().Msg("media sharing is disabled for this session")
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2022-01-06 22:28:34 +01:00
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receiver.Stop()
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2021-12-09 23:22:24 +01:00
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return
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}
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2021-11-28 23:16:26 +01:00
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2022-01-06 20:41:44 +01:00
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// parse codec from remote track
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2021-12-01 22:36:45 +01:00
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codec, ok := codec.ParseRTC(track.Codec())
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if !ok {
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2022-01-06 20:41:44 +01:00
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logger.Warn().Msg("remote track with unknown codec")
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2022-01-06 22:28:34 +01:00
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receiver.Stop()
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2021-11-28 23:16:26 +01:00
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return
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}
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2021-12-02 23:06:21 +01:00
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var srcManager types.StreamSrcManager
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2022-01-06 22:28:34 +01:00
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stopped := false
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stopFn := func() {
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if stopped {
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return
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}
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stopped = true
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receiver.Stop()
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srcManager.Stop()
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logger.Info().Msg("remote track stopped")
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}
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2021-12-02 23:06:21 +01:00
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if track.Kind() == webrtc.RTPCodecTypeAudio {
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// audio -> microphone
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srcManager = manager.capture.Microphone()
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2022-01-06 22:28:34 +01:00
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defer stopFn()
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if manager.micStop != nil {
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(*manager.micStop)()
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}
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manager.micStop = &stopFn
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2021-12-02 23:06:21 +01:00
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} else if track.Kind() == webrtc.RTPCodecTypeVideo {
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// video -> webcam
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srcManager = manager.capture.Webcam()
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2022-01-06 22:28:34 +01:00
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defer stopFn()
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if manager.camStop != nil {
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(*manager.camStop)()
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}
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manager.camStop = &stopFn
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} else {
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logger.Warn().Msg("remote track with unsupported codec type")
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receiver.Stop()
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return
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2021-12-02 23:06:21 +01:00
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}
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2021-12-02 23:35:38 +01:00
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err := srcManager.Start(codec)
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if err != nil {
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logger.Err(err).Msg("failed to start pipeline")
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return
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}
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2021-11-28 23:16:26 +01:00
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2022-01-06 20:41:44 +01:00
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ticker := time.NewTicker(rtcpPLIInterval)
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2021-11-28 23:16:26 +01:00
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defer ticker.Stop()
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go func() {
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for range ticker.C {
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2021-12-09 23:22:24 +01:00
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err := connection.WriteRTCP([]rtcp.Packet{&rtcp.PictureLossIndication{MediaSSRC: uint32(track.SSRC())}})
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if err != nil {
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2022-01-06 20:41:44 +01:00
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logger.Err(err).Msg("remote track rtcp send err")
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2021-11-28 23:16:26 +01:00
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}
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}
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}()
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buf := make([]byte, 1400)
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for {
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i, _, err := track.Read(buf)
|
|
|
|
if err != nil {
|
2022-01-06 20:41:44 +01:00
|
|
|
logger.Warn().Err(err).Msg("failed read from remote track")
|
2021-11-28 23:16:26 +01:00
|
|
|
break
|
|
|
|
}
|
|
|
|
|
2021-12-02 23:06:21 +01:00
|
|
|
srcManager.Push(buf[:i])
|
2021-11-28 23:16:26 +01:00
|
|
|
}
|
2021-12-01 22:36:45 +01:00
|
|
|
|
2022-01-06 20:41:44 +01:00
|
|
|
logger.Info().Msg("remote track data finished")
|
2021-11-25 23:46:06 +01:00
|
|
|
})
|
|
|
|
|
|
|
|
connection.OnDataChannel(func(dc *webrtc.DataChannel) {
|
2022-02-12 18:55:56 +01:00
|
|
|
logger.Info().Interface("data_channel", dc).Msg("got remote data channel")
|
2021-11-25 23:46:06 +01:00
|
|
|
})
|
|
|
|
|
2021-10-07 21:41:19 +02:00
|
|
|
connection.OnConnectionStateChange(func(state webrtc.PeerConnectionState) {
|
|
|
|
switch state {
|
|
|
|
case webrtc.PeerConnectionStateConnected:
|
|
|
|
session.SetWebRTCConnected(peer, true)
|
|
|
|
case webrtc.PeerConnectionStateDisconnected,
|
|
|
|
webrtc.PeerConnectionStateFailed:
|
|
|
|
connection.Close()
|
|
|
|
case webrtc.PeerConnectionStateClosed:
|
|
|
|
session.SetWebRTCConnected(peer, false)
|
|
|
|
videoTrack.RemoveStream()
|
|
|
|
audioTrack.RemoveStream()
|
|
|
|
}
|
2022-06-25 20:12:42 +02:00
|
|
|
|
|
|
|
manager.metrics.SetState(session, state)
|
2021-10-07 21:41:19 +02:00
|
|
|
})
|
|
|
|
|
2021-02-28 18:37:35 +01:00
|
|
|
cursorImage := func(entry *cursor.ImageEntry) {
|
|
|
|
if err := peer.SendCursorImage(entry.Cursor, entry.Image); err != nil {
|
2021-09-01 23:10:06 +02:00
|
|
|
logger.Err(err).Msg("could not send cursor image")
|
2021-02-13 18:25:40 +01:00
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
cursorPosition := func(x, y int) {
|
|
|
|
if session.IsHost() {
|
|
|
|
return
|
|
|
|
}
|
|
|
|
|
|
|
|
if err := peer.SendCursorPosition(x, y); err != nil {
|
2021-09-01 23:10:06 +02:00
|
|
|
logger.Err(err).Msg("could not send cursor position")
|
2021-02-13 18:25:40 +01:00
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
dataChannel.OnOpen(func() {
|
2021-02-28 18:37:35 +01:00
|
|
|
manager.curImage.AddListener(&cursorImage)
|
|
|
|
manager.curPosition.AddListener(&cursorPosition)
|
2021-02-17 21:55:21 +01:00
|
|
|
|
|
|
|
// send initial cursor image
|
2021-02-28 18:50:32 +01:00
|
|
|
entry, err := manager.curImage.Get()
|
2021-02-25 14:24:17 +01:00
|
|
|
if err == nil {
|
2021-02-28 18:37:35 +01:00
|
|
|
cursorImage(entry)
|
2021-02-25 14:24:17 +01:00
|
|
|
} else {
|
2021-09-01 23:10:06 +02:00
|
|
|
logger.Err(err).Msg("failed to get cursor image")
|
2021-02-25 14:24:17 +01:00
|
|
|
}
|
2021-02-21 00:41:04 +01:00
|
|
|
|
2021-02-17 21:55:21 +01:00
|
|
|
// send initial cursor position
|
2021-10-21 22:53:54 +02:00
|
|
|
x, y := manager.desktop.GetCursorPosition()
|
2021-02-17 21:55:21 +01:00
|
|
|
cursorPosition(x, y)
|
2021-02-13 18:25:40 +01:00
|
|
|
})
|
|
|
|
|
2021-02-28 18:37:35 +01:00
|
|
|
dataChannel.OnClose(func() {
|
|
|
|
manager.curImage.RemoveListener(&cursorImage)
|
|
|
|
manager.curPosition.RemoveListener(&cursorPosition)
|
|
|
|
})
|
|
|
|
|
2021-02-12 23:45:16 +01:00
|
|
|
dataChannel.OnMessage(func(message webrtc.DataChannelMessage) {
|
2021-10-07 21:41:19 +02:00
|
|
|
if err := manager.handle(message.Data, session); err != nil {
|
2021-09-01 23:10:06 +02:00
|
|
|
logger.Err(err).Msg("data handle failed")
|
2021-02-12 23:45:16 +01:00
|
|
|
}
|
|
|
|
})
|
2021-02-02 16:21:20 +01:00
|
|
|
|
2021-02-13 18:25:40 +01:00
|
|
|
session.SetWebRTCPeer(peer)
|
2022-02-10 23:39:52 +01:00
|
|
|
|
|
|
|
offer, err := peer.CreateOffer(false)
|
|
|
|
if err != nil {
|
|
|
|
return nil, err
|
|
|
|
}
|
|
|
|
|
|
|
|
// on negotiation needed handler must be registered after creating initial
|
|
|
|
// offer, otherwise it can fire and intercept sucessful negotiation
|
|
|
|
|
|
|
|
connection.OnNegotiationNeeded(func() {
|
|
|
|
logger.Warn().Msg("negotiation is needed")
|
|
|
|
|
|
|
|
if connection.SignalingState() != webrtc.SignalingStateStable {
|
|
|
|
logger.Warn().Msg("connection isn't stable yet; postponing...")
|
|
|
|
return
|
|
|
|
}
|
|
|
|
|
|
|
|
offer, err := peer.CreateOffer(false)
|
|
|
|
if err != nil {
|
|
|
|
logger.Err(err).Msg("sdp offer failed")
|
|
|
|
return
|
|
|
|
}
|
|
|
|
|
|
|
|
session.Send(
|
|
|
|
event.SIGNAL_OFFER,
|
|
|
|
message.SignalDescription{
|
|
|
|
SDP: offer.SDP,
|
|
|
|
})
|
|
|
|
})
|
|
|
|
|
2022-07-04 00:38:46 +02:00
|
|
|
videoTrack.OnRTCP(func(p rtcp.Packet) {
|
|
|
|
switch rtcpPacket := p.(type) {
|
|
|
|
case *rtcp.ReceiverEstimatedMaximumBitrate: // TODO: Deprecated.
|
|
|
|
manager.metrics.SetReceiverEstimatedMaximumBitrate(session, rtcpPacket.Bitrate)
|
2022-07-04 01:01:03 +02:00
|
|
|
|
|
|
|
case *rtcp.ReceiverReport:
|
|
|
|
l := len(rtcpPacket.Reports)
|
|
|
|
if l > 0 {
|
|
|
|
// use only last report
|
|
|
|
manager.metrics.SetReceiverReport(session, rtcpPacket.Reports[l-1])
|
|
|
|
}
|
2022-07-04 00:38:46 +02:00
|
|
|
}
|
|
|
|
})
|
|
|
|
|
2022-06-25 20:12:42 +02:00
|
|
|
go func() {
|
|
|
|
ticker := time.NewTicker(5 * time.Second)
|
|
|
|
defer ticker.Stop()
|
|
|
|
|
|
|
|
for range ticker.C {
|
|
|
|
if connection.ConnectionState() == webrtc.PeerConnectionStateClosed {
|
|
|
|
break
|
|
|
|
}
|
|
|
|
|
|
|
|
stats := connection.GetStats()
|
|
|
|
data, ok := stats["iceTransport"].(webrtc.TransportStats)
|
|
|
|
if ok {
|
2022-07-01 00:16:39 +02:00
|
|
|
manager.metrics.SetIceTransportStats(session, data)
|
|
|
|
}
|
|
|
|
|
|
|
|
data, ok = stats["sctpTransport"].(webrtc.TransportStats)
|
|
|
|
if ok {
|
|
|
|
manager.metrics.SetSctpTransportStats(session, data)
|
2022-06-25 20:12:42 +02:00
|
|
|
}
|
2022-06-30 23:50:47 +02:00
|
|
|
|
|
|
|
for _, entry := range stats {
|
|
|
|
// only remote ice candidate stats
|
|
|
|
candidate, ok := entry.(webrtc.ICECandidateStats)
|
|
|
|
if ok && candidate.Type == webrtc.StatsTypeRemoteCandidate {
|
|
|
|
manager.metrics.NewICECandidate(session, candidate.ID)
|
|
|
|
}
|
|
|
|
}
|
2022-06-25 20:12:42 +02:00
|
|
|
}
|
|
|
|
}()
|
|
|
|
|
2022-02-10 23:39:52 +01:00
|
|
|
return offer, nil
|
2021-02-02 19:21:48 +01:00
|
|
|
}
|