Add single UDP port for WebRTC Server

cmd/debug/stack.go

@@ -25,6 +25,7 @@ var stackSkip = [][]byte{
 
 	// webrtc/api.go
 	[]byte("created by github.com/pion/ice/v2.NewTCPMuxDefault"),
+	[]byte("created by github.com/pion/ice/v2.NewUDPMuxDefault"),
 }
 
 func stackHandler(w http.ResponseWriter, r *http.Request) {

cmd/webrtc/candidates.go

@@ -7,6 +7,7 @@ import (
 )
 
 var candidates []string
+var networks = []string{"udp", "tcp"}
 
 func AddCandidate(address string) {
 	candidates = append(candidates, address)
@@ -20,7 +21,8 @@ func asyncCandidates(tr *api.Transport) {
 			continue
 		}
 
-		cand, err := webrtc.NewCandidate(address)
+		for _, network := range networks {
+			cand, err := webrtc.NewCandidate(network, address)
 			if err != nil {
 				log.Warn().Err(err).Caller().Send()
 				continue
@@ -31,6 +33,7 @@ func asyncCandidates(tr *api.Transport) {
 			tr.Write(&api.Message{Type: "webrtc/candidate", Value: cand})
 		}
 	}
+}
 
 func syncCanditates(answer string) (string, error) {
 	if len(candidates) == 0 {
@@ -57,7 +60,8 @@ func syncCanditates(answer string) (string, error) {
 			continue
 		}
 
-		cand, err := webrtc.NewCandidate(address)
+		for _, network := range networks {
+			cand, err := webrtc.NewCandidate(network, address)
 			if err != nil {
 				log.Warn().Err(err).Msg("[webrtc] candidate")
 				continue
@@ -65,6 +69,7 @@ func syncCanditates(answer string) (string, error) {
 
 			md.WithPropertyAttribute(cand)
 		}
+	}
 
 	if end {
 		md.WithPropertyAttribute("end-of-candidates")

pkg/webrtc/api.go

@@ -35,13 +35,17 @@ func NewAPI(address string) (*webrtc.API, error) {
 	s.SetICEMulticastDNSMode(ice.MulticastDNSModeDisabled)
 
 	if address != "" {
-		ln, err := net.Listen("tcp", address)
-		if err == nil {
 		s.SetNetworkTypes([]webrtc.NetworkType{
 			webrtc.NetworkTypeUDP4, webrtc.NetworkTypeUDP6,
 			webrtc.NetworkTypeTCP4, webrtc.NetworkTypeTCP6,
 		})
 
+		if ln, err := net.ListenPacket("udp", address); err == nil {
+			udpMux := webrtc.NewICEUDPMux(nil, ln)
+			s.SetICEUDPMux(udpMux)
+		}
+
+		if ln, err := net.Listen("tcp", address); err == nil {
 			tcpMux := webrtc.NewICETCPMux(nil, ln, 8)
 			s.SetICETCPMux(tcpMux)
 		}

pkg/webrtc/helper.go

@@ -13,7 +13,7 @@ import (
 	"time"
 )
 
-func NewCandidate(address string) (string, error) {
+func NewCandidate(network, address string) (string, error) {
 	i := strings.LastIndexByte(address, ':')
 	if i < 0 {
 		return "", errors.New("wrong candidate: " + address)
@@ -26,7 +26,7 @@ func NewCandidate(address string) (string, error) {
 	}
 
 	cand, err := ice.NewCandidateHost(&ice.CandidateHostConfig{
-		Network:   "tcp",
+		Network:   network,
 		Address:   host,
 		Port:      i,
 		Component: ice.ComponentRTP,