Add support for more protos

BFCP, UDT and IX

unmarshal.go

@@ -808,7 +808,7 @@ func unmarshalMediaDescription(l *lexer) (stateFn, error) {
 	// https://tools.ietf.org/html/rfc4566#section-5.14
 	// https://tools.ietf.org/html/rfc4975#section-8.1
 	for _, proto := range strings.Split(field, "/") {
-		if !anyOf(proto, "UDP", "RTP", "AVP", "SAVP", "SAVPF", "TLS", "DTLS", "SCTP", "AVPF", "TCP", "MSRP") {
+		if !anyOf(proto, "UDP", "RTP", "AVP", "SAVP", "SAVPF", "TLS", "DTLS", "SCTP", "AVPF", "TCP", "MSRP", "BFCP", "UDT", "IX") {
 			return nil, fmt.Errorf("%w `%v`", errSDPInvalidNumericValue, field)
 		}
 		newMediaDesc.MediaName.Protos = append(newMediaDesc.MediaName.Protos, proto)

unmarshal_test.go

@@ -157,6 +157,18 @@ const (
 		"a=rtcp-fb:97 nack\r\n" +
 		"a=rtcp-fb:97 nack pli\r\n"
 
+	MediaBfcpSDP = TimingSDP +
+		"m=application 3238 UDP/BFCP *\r\n" +
+		"a=sendrecv\r\n" +
+		"a=setup:actpass\r\n" +
+		"a=connection:new\r\n" +
+		"a=floorctrl:c-s\r\n"
+
+	MediaCubeSDP = TimingSDP +
+		"m=application 2455 UDP/UDT/IX *\r\n" +
+		"a=ixmap:0 ping\r\n" +
+		"a=ixmap:2 xccp\r\n"
+
 	CanonicalUnmarshalSDP = "v=0\r\n" +
 		"o=jdoe 2890844526 2890842807 IN IP4 10.47.16.5\r\n" +
 		"s=SDP Seminar\r\n" +
@@ -300,6 +312,14 @@ func TestRoundTrip(t *testing.T) {
 			Name: "CanonicalUnmarshal",
 			SDP:  CanonicalUnmarshalSDP,
 		},
+		{
+			Name: "MediaBfcpSDP",
+			SDP:  MediaBfcpSDP,
+		},
+		{
+			Name: "MediaCubeSDP",
+			SDP:  MediaCubeSDP,
+		},
 	} {
 		test := test
 		t.Run(test.Name, func(t *testing.T) {