Use Pion's JSON support for ICE configuration.

README

@@ -38,7 +38,7 @@ It should look like this:
             ],
             "username": "username",
             "credential": "password"
-        },
+        }
     ]
 
 The port number, username and password should be the same as the ones in

go.mod

@@ -8,6 +8,6 @@ require (
 	github.com/pion/ice/v2 v2.0.14
 	github.com/pion/rtcp v1.2.6
 	github.com/pion/rtp v1.6.2
-	github.com/pion/webrtc/v3 v3.0.0
+	github.com/pion/webrtc/v3 v3.0.2-0.20201230060242-921608c26b93
 	golang.org/x/crypto v0.0.0-20201217014255-9d1352758620
 )

go.sum

@@ -54,12 +54,8 @@ github.com/pion/mdns v0.0.4 h1:O4vvVqr4DGX63vzmO6Fw9vpy3lfztVWHGCQfyw0ZLSY=
 github.com/pion/mdns v0.0.4/go.mod h1:R1sL0p50l42S5lJs91oNdUL58nm0QHrhxnSegr++qC0=
 github.com/pion/randutil v0.1.0 h1:CFG1UdESneORglEsnimhUjf33Rwjubwj6xfiOXBa3mA=
 github.com/pion/randutil v0.1.0/go.mod h1:XcJrSMMbbMRhASFVOlj/5hQial/Y8oH/HVo7TBZq+j8=
-github.com/pion/rtcp v1.2.4 h1:NT3H5LkUGgaEapvp0HGik+a+CpflRF7KTD7H+o7OWIM=
-github.com/pion/rtcp v1.2.4/go.mod h1:52rMNPWFsjr39z9B9MhnkqhPLoeHTv1aN63o/42bWE0=
 github.com/pion/rtcp v1.2.6 h1:1zvwBbyd0TeEuuWftrd/4d++m+/kZSeiguxU61LFWpo=
 github.com/pion/rtcp v1.2.6/go.mod h1:52rMNPWFsjr39z9B9MhnkqhPLoeHTv1aN63o/42bWE0=
-github.com/pion/rtp v1.6.1 h1:2Y2elcVBrahYnHKN2X7rMHX/r1R4TEBMP1LaVu/wNhk=
-github.com/pion/rtp v1.6.1/go.mod h1:bDb5n+BFZxXx0Ea7E5qe+klMuqiBrP+w8XSjiWtCUko=
 github.com/pion/rtp v1.6.2 h1:iGBerLX6JiDjB9NXuaPzHyxHFG9JsIEdgwTC0lp5n/U=
 github.com/pion/rtp v1.6.2/go.mod h1:bDb5n+BFZxXx0Ea7E5qe+klMuqiBrP+w8XSjiWtCUko=
 github.com/pion/sctp v1.7.10/go.mod h1:EhpTUQu1/lcK3xI+eriS6/96fWetHGCvBi9MSsnaBN0=
@@ -67,8 +63,8 @@ github.com/pion/sctp v1.7.11 h1:UCnj7MsobLKLuP/Hh+JMiI/6W5Bs/VF45lWKgHFjSIE=
 github.com/pion/sctp v1.7.11/go.mod h1:EhpTUQu1/lcK3xI+eriS6/96fWetHGCvBi9MSsnaBN0=
 github.com/pion/sdp/v3 v3.0.3 h1:gJK9hk+JFD2NGIM1nXmqNCq1DkVaIZ9dlA3u3otnkaw=
 github.com/pion/sdp/v3 v3.0.3/go.mod h1:bNiSknmJE0HYBprTHXKPQ3+JjacTv5uap92ueJZKsRk=
-github.com/pion/srtp/v2 v2.0.0-rc.3 h1:1fPiK1nJlNyh235tSGgBnXrPc99wK1/D707f6ntb3qY=
-github.com/pion/srtp/v2 v2.0.0-rc.3/go.mod h1:S6J9oY6ahAXdU3ni4nUwhWTJuBfssFjPxoB0u41TBpY=
+github.com/pion/srtp/v2 v2.0.0 h1:rS4vRR0XHakmnXkaptPaXHxRiqSPWSCrDXFl/ZWMLo0=
+github.com/pion/srtp/v2 v2.0.0/go.mod h1:QYOU1YKWaE/NJjR2WxtDMc+AfS9So0uz0RnadqOGJO8=
 github.com/pion/stun v0.3.5 h1:uLUCBCkQby4S1cf6CGuR9QrVOKcvUwFeemaC865QHDg=
 github.com/pion/stun v0.3.5/go.mod h1:gDMim+47EeEtfWogA37n6qXZS88L5V6LqFcf+DZA2UA=
 github.com/pion/transport v0.8.10/go.mod h1:tBmha/UCjpum5hqTWhfAEs3CO4/tHSg0MYRhSzR+CZ8=
@@ -78,12 +74,14 @@ github.com/pion/transport v0.10.1 h1:2W+yJT+0mOQ160ThZYUx5Zp2skzshiNgxrNE9GUfhJM
 github.com/pion/transport v0.10.1/go.mod h1:PBis1stIILMiis0PewDw91WJeLJkyIMcEk+DwKOzf4A=
 github.com/pion/transport v0.12.0 h1:UFmOBBZkTZ3LgvLRf/NGrfWdZEubcU6zkLU3PsA9YvU=
 github.com/pion/transport v0.12.0/go.mod h1:N3+vZQD9HlDP5GWkZ85LohxNsDcNgofQmyL6ojX5d8Q=
+github.com/pion/transport v0.12.1 h1:6v8lxQGVZpwSICEZjhl/CCv6aErINZlrm3O5ncFXj/c=
+github.com/pion/transport v0.12.1/go.mod h1:N3+vZQD9HlDP5GWkZ85LohxNsDcNgofQmyL6ojX5d8Q=
 github.com/pion/turn/v2 v2.0.5 h1:iwMHqDfPEDEOFzwWKT56eFmh6DYC6o/+xnLAEzgISbA=
 github.com/pion/turn/v2 v2.0.5/go.mod h1:APg43CFyt/14Uy7heYUOGWdkem/Wu4PhCO/bjyrTqMw=
 github.com/pion/udp v0.1.0 h1:uGxQsNyrqG3GLINv36Ff60covYmfrLoxzwnCsIYspXI=
 github.com/pion/udp v0.1.0/go.mod h1:BPELIjbwE9PRbd/zxI/KYBnbo7B6+oA6YuEaNE8lths=
-github.com/pion/webrtc/v3 v3.0.0 h1:/eTiY3NbfpKj5op8cqtCZlpTv9/yumd17YRinDNOUX0=
-github.com/pion/webrtc/v3 v3.0.0/go.mod h1:/xwKHOAk1Y8dspJcxMwuTtxpi8t/Gzks37iB3W6hNuM=
+github.com/pion/webrtc/v3 v3.0.2-0.20201230060242-921608c26b93 h1:lyPYvMAKRkqG5dJYa/DbwFqrWkA0QIcOkH7g+MS4OKs=
+github.com/pion/webrtc/v3 v3.0.2-0.20201230060242-921608c26b93/go.mod h1:jq9Zm/SEnlXqCANHUr0Fk8G+j0lYznq+athpXb6kwLM=
 github.com/pkg/errors v0.9.1 h1:FEBLx1zS214owpjy7qsBeixbURkuhQAwrK5UwLGTwt4=
 github.com/pkg/errors v0.9.1/go.mod h1:bwawxfHBFNV+L2hUp1rHADufV3IMtnDRdf1r5NINEl0=
 github.com/pmezard/go-difflib v1.0.0 h1:4DBwDE0NGyQoBHbLQYPwSUPoCMWR5BEzIk/f1lZbAQM=
@@ -129,6 +127,7 @@ golang.org/x/sys v0.0.0-20200519105757-fe76b779f299 h1:DYfZAGf2WMFjMxbgTjaC+2HC7
 golang.org/x/sys v0.0.0-20200519105757-fe76b779f299/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
 golang.org/x/sys v0.0.0-20200930185726-fdedc70b468f h1:+Nyd8tzPX9R7BWHguqsrbFdRx3WQ/1ib8I44HXV5yTA=
 golang.org/x/sys v0.0.0-20200930185726-fdedc70b468f/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
+golang.org/x/term v0.0.0-20201117132131-f5c789dd3221 h1:/ZHdbVpdR/jk3g30/d4yUL0JU9kksj8+F/bnQUVLGDM=
 golang.org/x/term v0.0.0-20201117132131-f5c789dd3221/go.mod h1:Nr5EML6q2oocZ2LXRh80K7BxOlk5/8JxuGnuhpl+muw=
 golang.org/x/text v0.3.0 h1:g61tztE5qeGQ89tm6NTjjM9VPIm088od1l6aSorWRWg=
 golang.org/x/text v0.3.0/go.mod h1:NqM8EUOU14njkJ3fqMW+pc6Ldnwhi/IjpwHt7yyuwOQ=

group/ice.go

@@ -2,6 +2,7 @@ package group
 
 import (
 	"encoding/json"
+	"errors"
 	"log"
 	"os"
 	"sync/atomic"
@@ -17,16 +18,28 @@ type ICEServer struct {
 	CredentialType string      `json:"credentialType,omitempty"`
 }
 
-type RTCConfiguration struct {
-	ICEServers         []ICEServer `json:"iceServers,omitempty"`
-	ICETransportPolicy string      `json:"iceTransportPolicy,omitempty"`
+func getICEServer(server ICEServer) (webrtc.ICEServer, error) {
+	s := webrtc.ICEServer{
+		URLs:       server.URLs,
+		Username:   server.Username,
+		Credential: server.Credential,
+	}
+	switch server.CredentialType {
+	case "", "password":
+		s.CredentialType = webrtc.ICECredentialTypePassword
+	case "oauth":
+		s.CredentialType = webrtc.ICECredentialTypeOauth
+	default:
+		return webrtc.ICEServer{}, errors.New("unsupported credential type")
+	}
+	return s, nil
 }
 
 var ICEFilename string
 var ICERelayOnly bool
 
 type iceConf struct {
-	conf      RTCConfiguration
+	conf      webrtc.Configuration
 	timestamp time.Time
 }
 
@@ -34,7 +47,7 @@ var iceConfiguration atomic.Value
 
 func updateICEConfiguration() *iceConf {
 	now := time.Now()
-	var conf RTCConfiguration
+	var conf webrtc.Configuration
 
 	if ICEFilename != "" {
 		file, err := os.Open(ICEFilename)
@@ -43,15 +56,24 @@ func updateICEConfiguration() *iceConf {
 		} else {
 			defer file.Close()
 			d := json.NewDecoder(file)
-			err = d.Decode(&conf.ICEServers)
+			var servers []ICEServer
+			err = d.Decode(&servers)
 			if err != nil {
 				log.Printf("Get ICE configuration: %v", err)
 			}
+			for _, s := range servers {
+				ss, err := getICEServer(s)
+				if err != nil {
+					log.Printf("parse ICE server: %v", err)
+					continue
+				}
+				conf.ICEServers = append(conf.ICEServers, ss)
+			}
 		}
 	}
 
 	if ICERelayOnly {
-		conf.ICETransportPolicy = "relay"
+		conf.ICETransportPolicy = webrtc.ICETransportPolicyRelay
 	}
 
 	iceConf := iceConf{
@@ -62,7 +84,7 @@ func updateICEConfiguration() *iceConf {
 	return &iceConf
 }
 
-func ICEConfiguration() *RTCConfiguration {
+func ICEConfiguration() *webrtc.Configuration {
 	conf, ok := iceConfiguration.Load().(*iceConf)
 	if !ok || time.Since(conf.timestamp) > 5*time.Minute {
 		conf = updateICEConfiguration()
@@ -72,31 +94,3 @@ func ICEConfiguration() *RTCConfiguration {
 
 	return &conf.conf
 }
-
-func ToConfiguration(conf *RTCConfiguration) webrtc.Configuration {
-	var iceServers []webrtc.ICEServer
-	for _, s := range conf.ICEServers {
-		tpe := webrtc.ICECredentialTypePassword
-		if s.CredentialType == "oauth" {
-			tpe = webrtc.ICECredentialTypeOauth
-		}
-		iceServers = append(iceServers,
-			webrtc.ICEServer{
-				URLs:           s.URLs,
-				Username:       s.Username,
-				Credential:     s.Credential,
-				CredentialType: tpe,
-			},
-		)
-	}
-
-	policy := webrtc.ICETransportPolicyAll
-	if conf.ICETransportPolicy == "relay" {
-		policy = webrtc.ICETransportPolicyRelay
-	}
-
-	return webrtc.Configuration{
-		ICEServers:         iceServers,
-		ICETransportPolicy: policy,
-	}
-}

rtpconn/rtpconn.go

@@ -138,9 +138,7 @@ type rtpDownConnection struct {
 
 func newDownConn(c group.Client, id string, remote conn.Up) (*rtpDownConnection, error) {
 	api := group.APIFromCodecs(remote.Codecs())
-	pc, err := api.NewPeerConnection(
-		group.ToConfiguration(group.ICEConfiguration()),
-	)
+	pc, err := api.NewPeerConnection(*group.ICEConfiguration())
 	if err != nil {
 		return nil, err
 	}
@@ -459,9 +457,7 @@ func pushConn(up *rtpUpConnection, g *group.Group, cs []group.Client) {
 }
 
 func newUpConn(c group.Client, id string, labels map[string]string) (*rtpUpConnection, error) {
-	pc, err := c.Group().API().NewPeerConnection(
-		group.ToConfiguration(group.ICEConfiguration()),
-	)
+	pc, err := c.Group().API().NewPeerConnection(*group.ICEConfiguration())
 	if err != nil {
 		return nil, err
 	}

rtpconn/webclient.go

@@ -177,7 +177,7 @@ type clientMessage struct {
 	Candidate        *webrtc.ICECandidateInit   `json:"candidate,omitempty"`
 	Labels           map[string]string          `json:"labels,omitempty"`
 	Request          rateMap                    `json:"request,omitempty"`
-	RTCConfiguration *group.RTCConfiguration    `json:"rtcConfiguration,omitempty"`
+	RTCConfiguration *webrtc.Configuration      `json:"rtcConfiguration,omitempty"`
 }
 
 type closeMessage struct {