Skip some validation checks when BUNDLE group value is found

Resolves #2621

sdp.go

@@ -709,8 +709,13 @@ func extractFingerprint(desc *sdp.SessionDescription) (string, string, error) {
 		return "", "", ErrSessionDescriptionNoFingerprint
 	}
 
+	// https://github.com/pion/webrtc/issues/2621
+	groupAttribue, _ := desc.Attribute(sdp.AttrKeyGroup)
+
+	isBundled := strings.Contains(groupAttribue, "BUNDLE")
+
 	for _, m := range fingerprints {
-		if m != fingerprints[0] {
+		if m != fingerprints[0] && !isBundled {
 			return "", "", ErrSessionDescriptionConflictingFingerprints
 		}
 	}
@@ -769,14 +774,19 @@ func extractICEDetails(desc *sdp.SessionDescription, log logging.LeveledLogger)
 		return "", "", nil, ErrSessionDescriptionMissingIcePwd
 	}
 
+	// https://github.com/pion/webrtc/issues/2621
+	groupAttribue, _ := desc.Attribute(sdp.AttrKeyGroup)
+
+	isBundled := strings.Contains(groupAttribue, "BUNDLE")
+
 	for _, m := range remoteUfrags {
-		if m != remoteUfrags[0] {
+		if m != remoteUfrags[0] && !isBundled {
 			return "", "", nil, ErrSessionDescriptionConflictingIceUfrag
 		}
 	}
 
 	for _, m := range remotePwds {
-		if m != remotePwds[0] {
+		if m != remotePwds[0] && !isBundled {
 			return "", "", nil, ErrSessionDescriptionConflictingIcePwd
 		}
 	}