Automatic SDP negotiation (#103)

server/internal/types/event/events.go

@@ -6,8 +6,8 @@ const (
 )
 
 const (
-	SIGNAL_ANSWER    = "signal/answer"
 	SIGNAL_OFFER     = "signal/offer"
+	SIGNAL_ANSWER    = "signal/answer"
 	SIGNAL_PROVIDE   = "signal/provide"
 	SIGNAL_CANDIDATE = "signal/candidate"
 )

server/internal/types/message/messages.go

@@ -24,6 +24,11 @@ type SignalProvide struct {
 	ICE   []webrtc.ICEServer `json:"ice"`
 }
 
+type SignalOffer struct {
+	Event string `json:"event"`
+	SDP   string `json:"sdp"`
+}
+
 type SignalAnswer struct {
 	Event       string `json:"event"`
 	DisplayName string `json:"displayname"`

server/internal/types/session.go

@@ -22,7 +22,10 @@ type Session interface {
 	Address() string
 	Kick(message string) error
 	Send(v interface{}) error
-	SignalAnswer(sdp string) error
+	SignalLocalOffer(sdp string) error
+	SignalLocalAnswer(sdp string) error
+	SignalRemoteOffer(sdp string) error
+	SignalRemoteAnswer(sdp string) error
 	SignalCandidate(data string) error
 }
 

server/internal/types/webrtc.go

@@ -10,11 +10,16 @@ type Sample media.Sample
 type WebRTCManager interface {
 	Start()
 	Shutdown() error
-	CreatePeer(id string, session Session) (string, bool, []webrtc.ICEServer, error)
+	CreatePeer(id string, session Session) (Peer, error)
+	ICELite() bool
+	ICEServers() []webrtc.ICEServer
 }
 
 type Peer interface {
-	SignalAnswer(sdp string) error
+	CreateOffer() (string, error)
+	CreateAnswer() (string, error)
+	SetOffer(sdp string) error
+	SetAnswer(sdp string) error
 	WriteData(v interface{}) error
 	Destroy() error
 }