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peerconnection_renegotiation_test.go
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// SPDX-FileCopyrightText: 2023 The Pion community <https://pion.ly>
// SPDX-License-Identifier: MIT
//go:build !js
// +build !js
package webrtc
import (
"bufio"
"context"
"errors"
"io"
"strconv"
"strings"
"sync"
"sync/atomic"
"testing"
"time"
"github.com/pion/rtp"
"github.com/pion/transport/v3/test"
"github.com/pion/webrtc/v4/internal/util"
"github.com/pion/webrtc/v4/pkg/media"
"github.com/pion/webrtc/v4/pkg/rtcerr"
"github.com/stretchr/testify/assert"
"github.com/stretchr/testify/require"
)
func sendVideoUntilDone(done <-chan struct{}, t *testing.T, tracks []*TrackLocalStaticSample) {
for {
select {
case <-time.After(20 * time.Millisecond):
for _, track := range tracks {
assert.NoError(t, track.WriteSample(media.Sample{Data: []byte{0x00}, Duration: time.Second}))
}
case <-done:
return
}
}
}
func sdpMidHasSsrc(offer SessionDescription, mid string, ssrc SSRC) bool {
for _, media := range offer.parsed.MediaDescriptions {
cmid, ok := media.Attribute("mid")
if !ok {
continue
}
if cmid != mid {
continue
}
cssrc, ok := media.Attribute("ssrc")
if !ok {
continue
}
parts := strings.Split(cssrc, " ")
ssrcInt64, err := strconv.ParseUint(parts[0], 10, 32)
if err != nil {
continue
}
if uint32(ssrcInt64) == uint32(ssrc) {
return true
}
}
return false
}
func TestPeerConnection_Renegotiation_AddRecvonlyTransceiver(t *testing.T) {
type testCase struct {
name string
answererSends bool
}
testCases := []testCase{
// Assert the following behaviors:
// - Offerer can add a recvonly transceiver
// - During negotiation, answerer peer adds an inactive (or sendonly) transceiver
// - Offerer can add a track
// - Answerer can receive the RTP packets.
{"add recvonly, then receive from answerer", false},
// Assert the following behaviors:
// - Offerer can add a recvonly transceiver
// - During negotiation, answerer peer adds an inactive (or sendonly) transceiver
// - Answerer can add a track to the existing sendonly transceiver
// - Offerer can receive the RTP packets.
{"add recvonly, then send to answerer", true},
}
for _, tc := range testCases {
tc := tc
t.Run(tc.name, func(t *testing.T) {
lim := test.TimeOut(time.Second * 30)
defer lim.Stop()
report := test.CheckRoutines(t)
defer report()
pcOffer, pcAnswer, err := newPair()
if err != nil {
t.Fatal(err)
}
_, err = pcOffer.AddTransceiverFromKind(
RTPCodecTypeVideo,
RTPTransceiverInit{
Direction: RTPTransceiverDirectionRecvonly,
},
)
assert.NoError(t, err)
assert.NoError(t, signalPair(pcOffer, pcAnswer))
localTrack, err := NewTrackLocalStaticSample(
RTPCodecCapability{MimeType: "video/VP8"}, "track-one", "stream-one",
)
require.NoError(t, err)
if tc.answererSends {
_, err = pcAnswer.AddTrack(localTrack)
} else {
_, err = pcOffer.AddTrack(localTrack)
}
require.NoError(t, err)
onTrackFired, onTrackFiredFunc := context.WithCancel(context.Background())
if tc.answererSends {
pcOffer.OnTrack(func(*TrackRemote, *RTPReceiver) {
onTrackFiredFunc()
})
assert.NoError(t, signalPair(pcAnswer, pcOffer))
} else {
pcAnswer.OnTrack(func(*TrackRemote, *RTPReceiver) {
onTrackFiredFunc()
})
assert.NoError(t, signalPair(pcOffer, pcAnswer))
}
sendVideoUntilDone(onTrackFired.Done(), t, []*TrackLocalStaticSample{localTrack})
closePairNow(t, pcOffer, pcAnswer)
})
}
}
/*
* Assert the following behaviors
* - We are able to call AddTrack after signaling
* - OnTrack is NOT called on the other side until after SetRemoteDescription
* - We are able to re-negotiate and AddTrack is properly called
*/
func TestPeerConnection_Renegotiation_AddTrack(t *testing.T) {
lim := test.TimeOut(time.Second * 30)
defer lim.Stop()
report := test.CheckRoutines(t)
defer report()
pcOffer, pcAnswer, err := newPair()
if err != nil {
t.Fatal(err)
}
haveRenegotiated := &atomicBool{}
onTrackFired, onTrackFiredFunc := context.WithCancel(context.Background())
pcAnswer.OnTrack(func(*TrackRemote, *RTPReceiver) {
if !haveRenegotiated.get() {
t.Fatal("OnTrack was called before renegotiation")
}
onTrackFiredFunc()
})
assert.NoError(t, signalPair(pcOffer, pcAnswer))
_, err = pcAnswer.AddTransceiverFromKind(RTPCodecTypeVideo, RTPTransceiverInit{Direction: RTPTransceiverDirectionRecvonly})
assert.NoError(t, err)
vp8Track, err := NewTrackLocalStaticSample(RTPCodecCapability{MimeType: MimeTypeVP8}, "foo", "bar")
assert.NoError(t, err)
sender, err := pcOffer.AddTrack(vp8Track)
assert.NoError(t, err)
// Send 10 packets, OnTrack MUST not be fired
for i := 0; i <= 10; i++ {
assert.NoError(t, vp8Track.WriteSample(media.Sample{Data: []byte{0x00}, Duration: time.Second}))
time.Sleep(20 * time.Millisecond)
}
haveRenegotiated.set(true)
assert.False(t, sender.isNegotiated())
offer, err := pcOffer.CreateOffer(nil)
assert.True(t, sender.isNegotiated())
assert.NoError(t, err)
assert.NoError(t, pcOffer.SetLocalDescription(offer))
assert.NoError(t, pcAnswer.SetRemoteDescription(offer))
answer, err := pcAnswer.CreateAnswer(nil)
assert.NoError(t, err)
assert.NoError(t, pcAnswer.SetLocalDescription(answer))
pcOffer.ops.Done()
assert.Equal(t, 0, len(vp8Track.rtpTrack.bindings))
assert.NoError(t, pcOffer.SetRemoteDescription(answer))
pcOffer.ops.Done()
assert.Equal(t, 1, len(vp8Track.rtpTrack.bindings))
sendVideoUntilDone(onTrackFired.Done(), t, []*TrackLocalStaticSample{vp8Track})
closePairNow(t, pcOffer, pcAnswer)
}
// Assert that adding tracks across multiple renegotiations performs as expected
func TestPeerConnection_Renegotiation_AddTrack_Multiple(t *testing.T) {
addTrackWithLabel := func(trackID string, pcOffer, pcAnswer *PeerConnection) *TrackLocalStaticSample {
_, err := pcAnswer.AddTransceiverFromKind(RTPCodecTypeVideo, RTPTransceiverInit{Direction: RTPTransceiverDirectionRecvonly})
assert.NoError(t, err)
track, err := NewTrackLocalStaticSample(RTPCodecCapability{MimeType: MimeTypeVP8}, trackID, trackID)
assert.NoError(t, err)
_, err = pcOffer.AddTrack(track)
assert.NoError(t, err)
return track
}
trackIDs := []string{util.MathRandAlpha(16), util.MathRandAlpha(16), util.MathRandAlpha(16)}
outboundTracks := []*TrackLocalStaticSample{}
onTrackCount := map[string]int{}
onTrackChan := make(chan struct{}, 1)
lim := test.TimeOut(time.Second * 30)
defer lim.Stop()
report := test.CheckRoutines(t)
defer report()
pcOffer, pcAnswer, err := newPair()
if err != nil {
t.Fatal(err)
}
pcAnswer.OnTrack(func(track *TrackRemote, _ *RTPReceiver) {
onTrackCount[track.ID()]++
onTrackChan <- struct{}{}
})
assert.NoError(t, signalPair(pcOffer, pcAnswer))
for i := range trackIDs {
outboundTracks = append(outboundTracks, addTrackWithLabel(trackIDs[i], pcOffer, pcAnswer))
assert.NoError(t, signalPair(pcOffer, pcAnswer))
sendVideoUntilDone(onTrackChan, t, outboundTracks)
}
closePairNow(t, pcOffer, pcAnswer)
assert.Equal(t, onTrackCount[trackIDs[0]], 1)
assert.Equal(t, onTrackCount[trackIDs[1]], 1)
assert.Equal(t, onTrackCount[trackIDs[2]], 1)
}
// Assert that renegotiation triggers OnTrack() with correct ID and label from
// remote side, even when a transceiver was added before the actual track data
// was received. This happens when we add a transceiver on the server, create
// an offer on the server and the browser's answer contains the same SSRC, but
// a track hasn't been added on the browser side yet. The browser can add a
// track later and renegotiate, and track ID and label will be set by the time
// first packets are received.
func TestPeerConnection_Renegotiation_AddTrack_Rename(t *testing.T) {
lim := test.TimeOut(time.Second * 30)
defer lim.Stop()
report := test.CheckRoutines(t)
defer report()
pcOffer, pcAnswer, err := newPair()
if err != nil {
t.Fatal(err)
}
haveRenegotiated := &atomicBool{}
onTrackFired, onTrackFiredFunc := context.WithCancel(context.Background())
var atomicRemoteTrack atomic.Value
pcOffer.OnTrack(func(track *TrackRemote, _ *RTPReceiver) {
if !haveRenegotiated.get() {
t.Fatal("OnTrack was called before renegotiation")
}
onTrackFiredFunc()
atomicRemoteTrack.Store(track)
})
_, err = pcOffer.AddTransceiverFromKind(RTPCodecTypeVideo, RTPTransceiverInit{Direction: RTPTransceiverDirectionRecvonly})
assert.NoError(t, err)
vp8Track, err := NewTrackLocalStaticSample(RTPCodecCapability{MimeType: MimeTypeVP8}, "foo1", "bar1")
assert.NoError(t, err)
_, err = pcAnswer.AddTrack(vp8Track)
assert.NoError(t, err)
assert.NoError(t, signalPair(pcOffer, pcAnswer))
vp8Track.rtpTrack.id = "foo2"
vp8Track.rtpTrack.streamID = "bar2"
haveRenegotiated.set(true)
assert.NoError(t, signalPair(pcOffer, pcAnswer))
sendVideoUntilDone(onTrackFired.Done(), t, []*TrackLocalStaticSample{vp8Track})
closePairNow(t, pcOffer, pcAnswer)
remoteTrack, ok := atomicRemoteTrack.Load().(*TrackRemote)
require.True(t, ok)
require.NotNil(t, remoteTrack)
assert.Equal(t, "foo2", remoteTrack.ID())
assert.Equal(t, "bar2", remoteTrack.StreamID())
}
// TestPeerConnection_Transceiver_Mid tests that we'll provide the same
// transceiver for a media id on successive offer/answer
func TestPeerConnection_Transceiver_Mid(t *testing.T) {
lim := test.TimeOut(time.Second * 30)
defer lim.Stop()
report := test.CheckRoutines(t)
defer report()
pcOffer, err := NewPeerConnection(Configuration{})
assert.NoError(t, err)
pcAnswer, err := NewPeerConnection(Configuration{})
assert.NoError(t, err)
track1, err := NewTrackLocalStaticSample(RTPCodecCapability{MimeType: MimeTypeVP8}, "video", "pion1")
require.NoError(t, err)
sender1, err := pcOffer.AddTrack(track1)
require.NoError(t, err)
track2, err := NewTrackLocalStaticSample(RTPCodecCapability{MimeType: MimeTypeVP8}, "video", "pion2")
require.NoError(t, err)
sender2, err := pcOffer.AddTrack(track2)
require.NoError(t, err)
// this will create the initial offer using generateUnmatchedSDP
offer, err := pcOffer.CreateOffer(nil)
assert.NoError(t, err)
offerGatheringComplete := GatheringCompletePromise(pcOffer)
assert.NoError(t, pcOffer.SetLocalDescription(offer))
<-offerGatheringComplete
assert.NoError(t, pcAnswer.SetRemoteDescription(*pcOffer.LocalDescription()))
answer, err := pcAnswer.CreateAnswer(nil)
assert.NoError(t, err)
answerGatheringComplete := GatheringCompletePromise(pcAnswer)
assert.NoError(t, pcAnswer.SetLocalDescription(answer))
<-answerGatheringComplete
// apply answer so we'll test generateMatchedSDP
assert.NoError(t, pcOffer.SetRemoteDescription(*pcAnswer.LocalDescription()))
pcOffer.ops.Done()
pcAnswer.ops.Done()
// Must have 3 media descriptions (2 video channels)
assert.Equal(t, len(offer.parsed.MediaDescriptions), 2)
assert.True(t, sdpMidHasSsrc(offer, "0", sender1.trackEncodings[0].ssrc), "Expected mid %q with ssrc %d, offer.SDP: %s", "0", sender1.trackEncodings[0].ssrc, offer.SDP)
// Remove first track, must keep same number of media
// descriptions and same track ssrc for mid 1 as previous
assert.NoError(t, pcOffer.RemoveTrack(sender1))
offer, err = pcOffer.CreateOffer(nil)
assert.NoError(t, err)
assert.NoError(t, pcOffer.SetLocalDescription(offer))
assert.Equal(t, len(offer.parsed.MediaDescriptions), 2)
assert.True(t, sdpMidHasSsrc(offer, "1", sender2.trackEncodings[0].ssrc), "Expected mid %q with ssrc %d, offer.SDP: %s", "1", sender2.trackEncodings[0].ssrc, offer.SDP)
_, err = pcAnswer.CreateAnswer(nil)
assert.Equal(t, err, &rtcerr.InvalidStateError{Err: ErrIncorrectSignalingState})
pcOffer.ops.Done()
pcAnswer.ops.Done()
assert.NoError(t, pcAnswer.SetRemoteDescription(offer))
answer, err = pcAnswer.CreateAnswer(nil)
assert.NoError(t, err)
assert.NoError(t, pcOffer.SetRemoteDescription(answer))
track3, err := NewTrackLocalStaticSample(RTPCodecCapability{MimeType: MimeTypeVP8}, "video", "pion3")
require.NoError(t, err)
sender3, err := pcOffer.AddTrack(track3)
require.NoError(t, err)
offer, err = pcOffer.CreateOffer(nil)
assert.NoError(t, err)
// We reuse the existing non-sending transceiver
assert.Equal(t, len(offer.parsed.MediaDescriptions), 2)
assert.True(t, sdpMidHasSsrc(offer, "0", sender3.trackEncodings[0].ssrc), "Expected mid %q with ssrc %d, offer.sdp: %s", "0", sender3.trackEncodings[0].ssrc, offer.SDP)
assert.True(t, sdpMidHasSsrc(offer, "1", sender2.trackEncodings[0].ssrc), "Expected mid %q with ssrc %d, offer.sdp: %s", "1", sender2.trackEncodings[0].ssrc, offer.SDP)
closePairNow(t, pcOffer, pcAnswer)
}
func TestPeerConnection_Renegotiation_CodecChange(t *testing.T) {
lim := test.TimeOut(time.Second * 30)
defer lim.Stop()
report := test.CheckRoutines(t)
defer report()
pcOffer, err := NewPeerConnection(Configuration{})
assert.NoError(t, err)
pcAnswer, err := NewPeerConnection(Configuration{})
assert.NoError(t, err)
track1, err := NewTrackLocalStaticSample(RTPCodecCapability{MimeType: MimeTypeVP8}, "video1", "pion1")
require.NoError(t, err)
track2, err := NewTrackLocalStaticSample(RTPCodecCapability{MimeType: MimeTypeVP8}, "video2", "pion2")
require.NoError(t, err)
sender1, err := pcOffer.AddTrack(track1)
require.NoError(t, err)
_, err = pcAnswer.AddTransceiverFromKind(RTPCodecTypeVideo, RTPTransceiverInit{Direction: RTPTransceiverDirectionRecvonly})
require.NoError(t, err)
tracksCh := make(chan *TrackRemote)
tracksClosed := make(chan struct{})
pcAnswer.OnTrack(func(track *TrackRemote, _ *RTPReceiver) {
tracksCh <- track
for {
if _, _, readErr := track.ReadRTP(); errors.Is(readErr, io.EOF) {
tracksClosed <- struct{}{}
return
}
}
})
err = signalPair(pcOffer, pcAnswer)
require.NoError(t, err)
transceivers := pcOffer.GetTransceivers()
require.Equal(t, 1, len(transceivers))
require.Equal(t, "0", transceivers[0].Mid())
transceivers = pcAnswer.GetTransceivers()
require.Equal(t, 1, len(transceivers))
require.Equal(t, "0", transceivers[0].Mid())
ctx, cancel := context.WithCancel(context.Background())
go sendVideoUntilDone(ctx.Done(), t, []*TrackLocalStaticSample{track1})
remoteTrack1 := <-tracksCh
cancel()
assert.Equal(t, "video1", remoteTrack1.ID())
assert.Equal(t, "pion1", remoteTrack1.StreamID())
require.NoError(t, pcOffer.RemoveTrack(sender1))
require.NoError(t, signalPair(pcOffer, pcAnswer))
<-tracksClosed
sender2, err := pcOffer.AddTrack(track2)
require.NoError(t, err)
require.NoError(t, signalPair(pcOffer, pcAnswer))
transceivers = pcOffer.GetTransceivers()
require.Equal(t, 1, len(transceivers))
require.Equal(t, "0", transceivers[0].Mid())
transceivers = pcAnswer.GetTransceivers()
require.Equal(t, 1, len(transceivers))
require.Equal(t, "0", transceivers[0].Mid())
ctx, cancel = context.WithCancel(context.Background())
go sendVideoUntilDone(ctx.Done(), t, []*TrackLocalStaticSample{track2})
remoteTrack2 := <-tracksCh
cancel()
require.NoError(t, pcOffer.RemoveTrack(sender2))
err = signalPair(pcOffer, pcAnswer)
require.NoError(t, err)
<-tracksClosed
assert.Equal(t, "video2", remoteTrack2.ID())
assert.Equal(t, "pion2", remoteTrack2.StreamID())
closePairNow(t, pcOffer, pcAnswer)
}
func TestPeerConnection_Renegotiation_RemoveTrack(t *testing.T) {
lim := test.TimeOut(time.Second * 30)
defer lim.Stop()
report := test.CheckRoutines(t)
defer report()
pcOffer, pcAnswer, err := newPair()
if err != nil {
t.Fatal(err)
}
_, err = pcAnswer.AddTransceiverFromKind(RTPCodecTypeVideo, RTPTransceiverInit{Direction: RTPTransceiverDirectionRecvonly})
assert.NoError(t, err)
vp8Track, err := NewTrackLocalStaticSample(RTPCodecCapability{MimeType: MimeTypeVP8}, "foo", "bar")
assert.NoError(t, err)
sender, err := pcOffer.AddTrack(vp8Track)
assert.NoError(t, err)
onTrackFired, onTrackFiredFunc := context.WithCancel(context.Background())
trackClosed, trackClosedFunc := context.WithCancel(context.Background())
pcAnswer.OnTrack(func(track *TrackRemote, _ *RTPReceiver) {
onTrackFiredFunc()
for {
if _, _, err := track.ReadRTP(); errors.Is(err, io.EOF) {
trackClosedFunc()
return
}
}
})
assert.NoError(t, signalPair(pcOffer, pcAnswer))
sendVideoUntilDone(onTrackFired.Done(), t, []*TrackLocalStaticSample{vp8Track})
assert.NoError(t, pcOffer.RemoveTrack(sender))
assert.NoError(t, signalPair(pcOffer, pcAnswer))
<-trackClosed.Done()
closePairNow(t, pcOffer, pcAnswer)
}
func TestPeerConnection_RoleSwitch(t *testing.T) {
lim := test.TimeOut(time.Second * 30)
defer lim.Stop()
report := test.CheckRoutines(t)
defer report()
pcFirstOfferer, pcSecondOfferer, err := newPair()
if err != nil {
t.Fatal(err)
}
onTrackFired, onTrackFiredFunc := context.WithCancel(context.Background())
pcFirstOfferer.OnTrack(func(*TrackRemote, *RTPReceiver) {
onTrackFiredFunc()
})
assert.NoError(t, signalPair(pcFirstOfferer, pcSecondOfferer))
// Add a new Track to the second offerer
// This asserts that it will match the ordering of the last RemoteDescription, but then also add new Transceivers to the end
_, err = pcFirstOfferer.AddTransceiverFromKind(RTPCodecTypeVideo, RTPTransceiverInit{Direction: RTPTransceiverDirectionRecvonly})
assert.NoError(t, err)
vp8Track, err := NewTrackLocalStaticSample(RTPCodecCapability{MimeType: MimeTypeVP8}, "foo", "bar")
assert.NoError(t, err)
_, err = pcSecondOfferer.AddTrack(vp8Track)
assert.NoError(t, err)
assert.NoError(t, signalPair(pcSecondOfferer, pcFirstOfferer))
sendVideoUntilDone(onTrackFired.Done(), t, []*TrackLocalStaticSample{vp8Track})
closePairNow(t, pcFirstOfferer, pcSecondOfferer)
}
// Assert that renegotiation doesn't attempt to gather ICE twice
// Before we would attempt to gather multiple times and would put
// the PeerConnection into a broken state
func TestPeerConnection_Renegotiation_Trickle(t *testing.T) {
lim := test.TimeOut(time.Second * 30)
defer lim.Stop()
report := test.CheckRoutines(t)
defer report()
settingEngine := SettingEngine{}
api := NewAPI(WithSettingEngine(settingEngine))
assert.NoError(t, api.mediaEngine.RegisterDefaultCodecs())
// Invalid STUN server on purpose, will stop ICE Gathering from completing in time
pcOffer, pcAnswer, err := api.newPair(Configuration{
ICEServers: []ICEServer{
{
URLs: []string{"stun:127.0.0.1:5000"},
},
},
})
if err != nil {
t.Fatal(err)
}
_, err = pcOffer.CreateDataChannel("test-channel", nil)
assert.NoError(t, err)
var wg sync.WaitGroup
wg.Add(2)
pcOffer.OnICECandidate(func(c *ICECandidate) {
if c != nil {
assert.NoError(t, pcAnswer.AddICECandidate(c.ToJSON()))
} else {
wg.Done()
}
})
pcAnswer.OnICECandidate(func(c *ICECandidate) {
if c != nil {
assert.NoError(t, pcOffer.AddICECandidate(c.ToJSON()))
} else {
wg.Done()
}
})
negotiate := func() {
offer, err := pcOffer.CreateOffer(nil)
assert.NoError(t, err)
assert.NoError(t, pcAnswer.SetRemoteDescription(offer))
assert.NoError(t, pcOffer.SetLocalDescription(offer))
answer, err := pcAnswer.CreateAnswer(nil)
assert.NoError(t, err)
assert.NoError(t, pcOffer.SetRemoteDescription(answer))
assert.NoError(t, pcAnswer.SetLocalDescription(answer))
}
negotiate()
negotiate()
pcOffer.ops.Done()
pcAnswer.ops.Done()
wg.Wait()
closePairNow(t, pcOffer, pcAnswer)
}
func TestPeerConnection_Renegotiation_SetLocalDescription(t *testing.T) {
lim := test.TimeOut(time.Second * 30)
defer lim.Stop()
report := test.CheckRoutines(t)
defer report()
pcOffer, pcAnswer, err := newPair()
if err != nil {
t.Fatal(err)
}
onTrackFired, onTrackFiredFunc := context.WithCancel(context.Background())
pcOffer.OnTrack(func(*TrackRemote, *RTPReceiver) {
onTrackFiredFunc()
})
assert.NoError(t, signalPair(pcOffer, pcAnswer))
pcOffer.ops.Done()
pcAnswer.ops.Done()
_, err = pcOffer.AddTransceiverFromKind(RTPCodecTypeVideo, RTPTransceiverInit{Direction: RTPTransceiverDirectionRecvonly})
assert.NoError(t, err)
localTrack, err := NewTrackLocalStaticSample(RTPCodecCapability{MimeType: MimeTypeVP8}, "foo", "bar")
assert.NoError(t, err)
sender, err := pcAnswer.AddTrack(localTrack)
assert.NoError(t, err)
offer, err := pcOffer.CreateOffer(nil)
assert.NoError(t, err)
assert.NoError(t, pcOffer.SetLocalDescription(offer))
assert.NoError(t, pcAnswer.SetRemoteDescription(offer))
assert.False(t, sender.isNegotiated())
answer, err := pcAnswer.CreateAnswer(nil)
assert.NoError(t, err)
assert.True(t, sender.isNegotiated())
pcAnswer.ops.Done()
assert.Equal(t, 0, len(localTrack.rtpTrack.bindings))
assert.NoError(t, pcAnswer.SetLocalDescription(answer))
pcAnswer.ops.Done()
assert.Equal(t, 1, len(localTrack.rtpTrack.bindings))
assert.NoError(t, pcOffer.SetRemoteDescription(answer))
sendVideoUntilDone(onTrackFired.Done(), t, []*TrackLocalStaticSample{localTrack})
closePairNow(t, pcOffer, pcAnswer)
}
// Issue #346, don't start the SCTP Subsystem if the RemoteDescription doesn't contain one
// Before we would always start it, and re-negotiations would fail because SCTP was in flight
func TestPeerConnection_Renegotiation_NoApplication(t *testing.T) {
signalPairExcludeDataChannel := func(pcOffer, pcAnswer *PeerConnection) {
offer, err := pcOffer.CreateOffer(nil)
assert.NoError(t, err)
offerGatheringComplete := GatheringCompletePromise(pcOffer)
assert.NoError(t, pcOffer.SetLocalDescription(offer))
<-offerGatheringComplete
assert.NoError(t, pcAnswer.SetRemoteDescription(*pcOffer.LocalDescription()))
answer, err := pcAnswer.CreateAnswer(nil)
assert.NoError(t, err)
answerGatheringComplete := GatheringCompletePromise(pcAnswer)
assert.NoError(t, pcAnswer.SetLocalDescription(answer))
<-answerGatheringComplete
assert.NoError(t, pcOffer.SetRemoteDescription(*pcAnswer.LocalDescription()))
}
lim := test.TimeOut(time.Second * 30)
defer lim.Stop()
report := test.CheckRoutines(t)
defer report()
pcOffer, pcAnswer, err := newPair()
if err != nil {
t.Fatal(err)
}
pcOfferConnected, pcOfferConnectedCancel := context.WithCancel(context.Background())
pcOffer.OnICEConnectionStateChange(func(i ICEConnectionState) {
if i == ICEConnectionStateConnected {
pcOfferConnectedCancel()
}
})
pcAnswerConnected, pcAnswerConnectedCancel := context.WithCancel(context.Background())
pcAnswer.OnICEConnectionStateChange(func(i ICEConnectionState) {
if i == ICEConnectionStateConnected {
pcAnswerConnectedCancel()
}
})
_, err = pcOffer.AddTransceiverFromKind(RTPCodecTypeVideo, RTPTransceiverInit{Direction: RTPTransceiverDirectionSendrecv})
assert.NoError(t, err)
_, err = pcAnswer.AddTransceiverFromKind(RTPCodecTypeVideo, RTPTransceiverInit{Direction: RTPTransceiverDirectionSendrecv})
assert.NoError(t, err)
signalPairExcludeDataChannel(pcOffer, pcAnswer)
pcOffer.ops.Done()
pcAnswer.ops.Done()
signalPairExcludeDataChannel(pcOffer, pcAnswer)
pcOffer.ops.Done()
pcAnswer.ops.Done()
<-pcAnswerConnected.Done()
<-pcOfferConnected.Done()
assert.Equal(t, pcOffer.SCTP().State(), SCTPTransportStateConnecting)
assert.Equal(t, pcAnswer.SCTP().State(), SCTPTransportStateConnecting)
closePairNow(t, pcOffer, pcAnswer)
}
func TestAddDataChannelDuringRenegotiation(t *testing.T) {
lim := test.TimeOut(time.Second * 10)
defer lim.Stop()
report := test.CheckRoutines(t)
defer report()
pcOffer, err := NewPeerConnection(Configuration{})
assert.NoError(t, err)
pcAnswer, err := NewPeerConnection(Configuration{})
assert.NoError(t, err)
track, err := NewTrackLocalStaticSample(RTPCodecCapability{MimeType: MimeTypeVP8}, "video", "pion")
assert.NoError(t, err)
_, err = pcOffer.AddTrack(track)
assert.NoError(t, err)
offer, err := pcOffer.CreateOffer(nil)
assert.NoError(t, err)
offerGatheringComplete := GatheringCompletePromise(pcOffer)
assert.NoError(t, pcOffer.SetLocalDescription(offer))
<-offerGatheringComplete
assert.NoError(t, pcAnswer.SetRemoteDescription(*pcOffer.LocalDescription()))
answer, err := pcAnswer.CreateAnswer(nil)
assert.NoError(t, err)
answerGatheringComplete := GatheringCompletePromise(pcAnswer)
assert.NoError(t, pcAnswer.SetLocalDescription(answer))
<-answerGatheringComplete
assert.NoError(t, pcOffer.SetRemoteDescription(*pcAnswer.LocalDescription()))
_, err = pcOffer.CreateDataChannel("data-channel", nil)
assert.NoError(t, err)
// Assert that DataChannel is in offer now
offer, err = pcOffer.CreateOffer(nil)
assert.NoError(t, err)
applicationMediaSectionCount := 0
for _, d := range offer.parsed.MediaDescriptions {
if d.MediaName.Media == mediaSectionApplication {
applicationMediaSectionCount++
}
}
assert.Equal(t, applicationMediaSectionCount, 1)
onDataChannelFired, onDataChannelFiredFunc := context.WithCancel(context.Background())
pcAnswer.OnDataChannel(func(*DataChannel) {
onDataChannelFiredFunc()
})
assert.NoError(t, signalPair(pcOffer, pcAnswer))
<-onDataChannelFired.Done()
closePairNow(t, pcOffer, pcAnswer)
}
// Assert that CreateDataChannel fires OnNegotiationNeeded
func TestNegotiationCreateDataChannel(t *testing.T) {
lim := test.TimeOut(time.Second * 30)
defer lim.Stop()
report := test.CheckRoutines(t)
defer report()
pc, err := NewPeerConnection(Configuration{})
assert.NoError(t, err)
var wg sync.WaitGroup
wg.Add(1)
pc.OnNegotiationNeeded(func() {
defer func() {
wg.Done()
}()
})
// Create DataChannel, wait until OnNegotiationNeeded is fired
if _, err = pc.CreateDataChannel("testChannel", nil); err != nil {
t.Error(err.Error())
}
// Wait until OnNegotiationNeeded is fired
wg.Wait()
assert.NoError(t, pc.Close())
}
func TestNegotiationNeededRemoveTrack(t *testing.T) {
var wg sync.WaitGroup
wg.Add(1)
report := test.CheckRoutines(t)
defer report()
pcOffer, err := NewPeerConnection(Configuration{})
assert.NoError(t, err)
pcAnswer, err := NewPeerConnection(Configuration{})
assert.NoError(t, err)
track, err := NewTrackLocalStaticSample(RTPCodecCapability{MimeType: MimeTypeVP8}, "video", "pion")
assert.NoError(t, err)
pcOffer.OnNegotiationNeeded(func() {
wg.Add(1)
offer, createOfferErr := pcOffer.CreateOffer(nil)
assert.NoError(t, createOfferErr)
offerGatheringComplete := GatheringCompletePromise(pcOffer)
assert.NoError(t, pcOffer.SetLocalDescription(offer))
<-offerGatheringComplete
assert.NoError(t, pcAnswer.SetRemoteDescription(*pcOffer.LocalDescription()))
answer, createAnswerErr := pcAnswer.CreateAnswer(nil)
assert.NoError(t, createAnswerErr)
answerGatheringComplete := GatheringCompletePromise(pcAnswer)
assert.NoError(t, pcAnswer.SetLocalDescription(answer))
<-answerGatheringComplete
assert.NoError(t, pcOffer.SetRemoteDescription(*pcAnswer.LocalDescription()))
wg.Done()
wg.Done()
})
sender, err := pcOffer.AddTrack(track)
assert.NoError(t, err)
assert.NoError(t, track.WriteSample(media.Sample{Data: []byte{0x00}, Duration: time.Second}))
wg.Wait()
wg.Add(1)
assert.NoError(t, pcOffer.RemoveTrack(sender))
wg.Wait()
closePairNow(t, pcOffer, pcAnswer)
}
func TestNegotiationNeededStressOneSided(t *testing.T) {
lim := test.TimeOut(time.Second * 30)
defer lim.Stop()
report := test.CheckRoutines(t)
defer report()
pcA, pcB, err := newPair()
assert.NoError(t, err)
const expectedTrackCount = 500
ctx, done := context.WithCancel(context.Background())
pcA.OnNegotiationNeeded(func() {
count := len(pcA.GetTransceivers())
assert.NoError(t, signalPair(pcA, pcB))
if count == expectedTrackCount {
done()
}
})
for i := 0; i < expectedTrackCount; i++ {
track, err := NewTrackLocalStaticSample(RTPCodecCapability{MimeType: MimeTypeVP8}, "video", "pion")
assert.NoError(t, err)
_, err = pcA.AddTrack(track)
assert.NoError(t, err)
}
<-ctx.Done()
assert.Equal(t, expectedTrackCount, len(pcB.GetTransceivers()))
closePairNow(t, pcA, pcB)
}
// TestPeerConnection_Renegotiation_DisableTrack asserts that if a remote track is set inactive
// that locally it goes inactive as well
func TestPeerConnection_Renegotiation_DisableTrack(t *testing.T) {
lim := test.TimeOut(time.Second * 30)
defer lim.Stop()
report := test.CheckRoutines(t)
defer report()
pcOffer, pcAnswer, err := newPair()
assert.NoError(t, err)
// Create two transceivers
_, err = pcOffer.AddTransceiverFromKind(RTPCodecTypeVideo)
assert.NoError(t, err)
transceiver, err := pcOffer.AddTransceiverFromKind(RTPCodecTypeVideo)
assert.NoError(t, err)
assert.NoError(t, signalPair(pcOffer, pcAnswer))
// Assert we have three active transceivers
offer, err := pcOffer.CreateOffer(nil)
assert.NoError(t, err)
assert.Equal(t, strings.Count(offer.SDP, "a=sendrecv"), 3)
// Assert we have two active transceivers, one inactive
assert.NoError(t, transceiver.Stop())
offer, err = pcOffer.CreateOffer(nil)
assert.NoError(t, err)
assert.Equal(t, strings.Count(offer.SDP, "a=sendrecv"), 2)
assert.Equal(t, strings.Count(offer.SDP, "a=inactive"), 1)
// Assert that the offer disabled one of our transceivers
assert.NoError(t, pcAnswer.SetRemoteDescription(offer))