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Response now use the same mid value as the offer

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When generating responses we were incorrectly using numeric mid values.
This works for Unified Plan offers, but was breaking Plan-B
This commit is contained in:
Sean DuBois
2019-04-07 20:35:48 -07:00
parent faa37992d3
commit fc7a465150
1 changed files with 23 additions and 14 deletions
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37
peerconnection.go
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@@ -468,10 +468,11 @@ func (pc *PeerConnection) CreateOffer(options *OfferOptions) (SessionDescription
}
for _, t := range pc.GetTransceivers() {
pc.addTransceiverSDP(d, t, bundleCount, iceParams, candidates, sdp.ConnectionRoleActpass)
pc.addTransceiverSDP(d, t, strconv.Itoa(bundleCount), iceParams, candidates, sdp.ConnectionRoleActpass)
appendBundle()
}
pc.addDataMediaSection(d, bundleCount, iceParams, candidates, sdp.ConnectionRoleActive)
pc.addDataMediaSection(d, strconv.Itoa(bundleCount), iceParams, candidates, sdp.ConnectionRoleActive)
appendBundle()
for _, m := range d.MediaDescriptions {
@@ -601,16 +602,24 @@ func (pc *PeerConnection) CreateAnswer(options *AnswerOptions) (SessionDescripti
}
bundleValue := "BUNDLE"
bundleCount := 0
appendBundle := func() {
bundleValue += " " + strconv.Itoa(bundleCount)
bundleCount++
appendBundle := func(midValue string) {
bundleValue += " " + midValue
}
for _, media := range pc.RemoteDescription().parsed.MediaDescriptions {
midValue := ""
for _, attr := range media.Attributes {
if attr.Key == "mid" {
midValue = attr.Value
}
}
if midValue == "" {
return SessionDescription{}, fmt.Errorf("RemoteDescription contained media section without mid value")
}
if media.MediaName.Media == "application" {
pc.addDataMediaSection(d, bundleCount, iceParams, candidates, sdp.ConnectionRoleActive)
appendBundle()
pc.addDataMediaSection(d, midValue, iceParams, candidates, sdp.ConnectionRoleActive)
appendBundle(midValue)
continue
}
@@ -621,8 +630,8 @@ func (pc *PeerConnection) CreateAnswer(options *AnswerOptions) (SessionDescripti
}
t := satisfyPeerMedia(kind, direction)
pc.addTransceiverSDP(d, t, bundleCount, iceParams, candidates, sdp.ConnectionRoleActive)
appendBundle()
pc.addTransceiverSDP(d, t, midValue, iceParams, candidates, sdp.ConnectionRoleActive)
appendBundle(midValue)
}
d = d.WithValueAttribute(sdp.AttrKeyGroup, bundleValue)
@@ -1491,10 +1500,10 @@ func (pc *PeerConnection) addFingerprint(d *sdp.SessionDescription) error {
return nil
}
func (pc *PeerConnection) addTransceiverSDP(d *sdp.SessionDescription, t *RTPTransceiver, midOffset int, iceParams ICEParameters, candidates []ICECandidate, dtlsRole sdp.ConnectionRole) {
func (pc *PeerConnection) addTransceiverSDP(d *sdp.SessionDescription, t *RTPTransceiver, midValue string, iceParams ICEParameters, candidates []ICECandidate, dtlsRole sdp.ConnectionRole) {
media := sdp.NewJSEPMediaDescription(t.kind.String(), []string{}).
WithValueAttribute(sdp.AttrKeyConnectionSetup, dtlsRole.String()). // TODO: Support other connection types
WithValueAttribute(sdp.AttrKeyMID, strconv.Itoa(midOffset)).
WithValueAttribute(sdp.AttrKeyMID, midValue).
WithICECredentials(iceParams.UsernameFragment, iceParams.Password).
WithPropertyAttribute(sdp.AttrKeyRTCPMux). // TODO: support RTCP fallback
WithPropertyAttribute(sdp.AttrKeyRTCPRsize) // TODO: Support Reduced-Size RTCP?
@@ -1529,7 +1538,7 @@ func (pc *PeerConnection) addTransceiverSDP(d *sdp.SessionDescription, t *RTPTra
d.WithMedia(media)
}
func (pc *PeerConnection) addDataMediaSection(d *sdp.SessionDescription, midOffset int, iceParams ICEParameters, candidates []ICECandidate, dtlsRole sdp.ConnectionRole) {
func (pc *PeerConnection) addDataMediaSection(d *sdp.SessionDescription, midValue string, iceParams ICEParameters, candidates []ICECandidate, dtlsRole sdp.ConnectionRole) {
media := (&sdp.MediaDescription{
MediaName: sdp.MediaName{
Media: "application",
@@ -1546,7 +1555,7 @@ func (pc *PeerConnection) addDataMediaSection(d *sdp.SessionDescription, midOffs
},
}).
WithValueAttribute(sdp.AttrKeyConnectionSetup, dtlsRole.String()). // TODO: Support other connection types
WithValueAttribute(sdp.AttrKeyMID, strconv.Itoa(midOffset)).
WithValueAttribute(sdp.AttrKeyMID, midValue).
WithPropertyAttribute(RTPTransceiverDirectionSendrecv.String()).
WithPropertyAttribute("sctpmap:5000 webrtc-datachannel 1024").
WithICECredentials(iceParams.UsernameFragment, iceParams.Password)