Detach: Expose data channel networking

Resolves #277

settingengine.go

@@ -4,16 +4,6 @@ import "github.com/pions/webrtc/pkg/ice"
 
 var defaultSettingEngine = newSettingEngine()
 
-// settingEngine allows influencing behavior in ways that are not
-// supported by the WebRTC API. This allows us to support additional
-// use-cases without deviating from the WebRTC API elsewhere.
-type settingEngine struct {
-	EphemeralUDP struct {
-		PortMin uint16
-		PortMax uint16
-	}
-}
-
 // SetEphemeralUDPPortRange limits the pool of ephemeral ports that
 // ICE UDP connections can allocate from. This setting currently only
 // affects host candidates, not server reflexive candidates.
@@ -27,6 +17,33 @@ func SetEphemeralUDPPortRange(portMin, portMax uint16) error {
 	return nil
 }
 
+// DetachDataChannels enables detaching data channels. When enabled
+// data channels have to be detached in the OnOpen callback using the
+// RTCDataChannel.Detach method.
+func DetachDataChannels() {
+	defaultSettingEngine.DetachDataChannels()
+}
+
+// settingEngine allows influencing behavior in ways that are not
+// supported by the WebRTC API. This allows us to support additional
+// use-cases without deviating from the WebRTC API elsewhere.
+type settingEngine struct {
+	EphemeralUDP struct {
+		PortMin uint16
+		PortMax uint16
+	}
+	Detach struct {
+		DataChannels bool
+	}
+}
+
+// DetachDataChannels enables detaching data channels. When enabled
+// data channels have to be detached in the OnOpen callback using the
+// RTCDataChannel.Detach method.
+func (e *settingEngine) DetachDataChannels() {
+	e.Detach.DataChannels = true
+}
+
 func newSettingEngine() *settingEngine {
 	return new(settingEngine)
 }