Базовый Readme, понятные переменные окружения

turn/turn.go

@@ -19,6 +19,25 @@ type Config struct {
 	Realm      string
 	Username   string
 	Password   string
+
+	MinRelayPort uint16
+	MaxRelayPort uint16
+}
+
+func relayGen(ip net.IP, minPort, maxPort uint16) pionturn.RelayAddressGenerator {
+	if minPort != 0 && maxPort != 0 && minPort <= maxPort {
+		return &pionturn.RelayAddressGeneratorPortRange{
+			RelayAddress: ip,
+			Address:      "0.0.0.0",
+			MinPort:      minPort,
+			MaxPort:      maxPort,
+		}
+	}
+
+	return &pionturn.RelayAddressGeneratorStatic{
+		RelayAddress: ip,
+		Address:      "0.0.0.0",
+	}
 }
 
 func Start(cfg Config) (*Server, error) {
@@ -38,6 +57,8 @@ func Start(cfg Config) (*Server, error) {
 		return nil, err
 	}
 
+	rg := relayGen(ip, cfg.MinRelayPort, cfg.MaxRelayPort)
+
 	srv, err := pionturn.NewServer(pionturn.ServerConfig{
 		Realm: cfg.Realm,
 		AuthHandler: func(username, realm string, srcAddr net.Addr) ([]byte, bool) {
@@ -48,23 +69,18 @@ func Start(cfg Config) (*Server, error) {
 		},
 		PacketConnConfigs: []pionturn.PacketConnConfig{
 			{
-				PacketConn: udpConn,
-				RelayAddressGenerator: &pionturn.RelayAddressGeneratorStatic{
-					RelayAddress: ip,
-					Address:      "0.0.0.0",
-				},
+				PacketConn:            udpConn,
+				RelayAddressGenerator: rg,
 			},
 		},
 		ListenerConfigs: []pionturn.ListenerConfig{
 			{
-				Listener: tcpListener,
-				RelayAddressGenerator: &pionturn.RelayAddressGeneratorStatic{
-					RelayAddress: ip,
-					Address:      "0.0.0.0",
-				},
+				Listener:              tcpListener,
+				RelayAddressGenerator: rg,
 			},
 		},
 	})
+
 	if err != nil {
 		_ = tcpListener.Close()
 		_ = udpConn.Close()