Add optional DTLS role config param

configs/config.yaml

@@ -252,6 +252,13 @@ webrtc:
   # turn off default Pion interceptors (see: https://github.com/pion/interceptor)
   # (performance)
   disableDefaultInterceptors:
+  # indicates the role of the DTLS transport (see: https://github.com/pion/webrtc/blob/master/dtlsrole.go)
+  # (debug)
+  #  - (default)
+  #  - 1 (auto)
+  #  - 2 (client)
+  #  - 3 (server)
+  dtlsRole:
   # a list of STUN/TURN servers to use
   iceServers:
     - url: stun:stun.l.google.com:19302

pkg/config/webrtc/config.go

@@ -4,6 +4,7 @@ import "github.com/giongto35/cloud-game/v2/pkg/config/encoder"
 
 type Webrtc struct {
 	DisableDefaultInterceptors bool
+	DtlsRole                   byte
 	IceServers                 []IceServer
 	IcePorts                   struct {
 		Min uint16

pkg/webrtc/connection.go

@@ -36,6 +36,12 @@ func DefaultPeerConnection(conf conf.Webrtc) (*PeerConnection, error) {
 
 	settingsOnce.Do(func() {
 		settingEngine := pion.SettingEngine{}
+		if conf.DtlsRole > 0 {
+			log.Printf("A custom DTLS role [%v]", conf.DtlsRole)
+			if err := settingEngine.SetAnsweringDTLSRole(pion.DTLSRole(conf.DtlsRole)); err != nil {
+				panic(err)
+			}
+		}
 		if conf.IcePorts.Min > 0 && conf.IcePorts.Max > 0 {
 			if err := settingEngine.SetEphemeralUDPPortRange(conf.IcePorts.Min, conf.IcePorts.Max); err != nil {
 				panic(err)