update.

Author: cloudwebrtc

lib/src/e2ee.worker/e2ee.cryptor.dart

@@ -500,10 +500,13 @@ class FrameCryptor {
 
     if (keyOptions.uncryptedMagicBytes != null) {
       var magicBytes = keyOptions.uncryptedMagicBytes!;
-      if (buffer.length >= magicBytes.length + 1) {
+      if (buffer.length > magicBytes.length + 1) {
         var magicBytesBuffer = buffer.sublist(
-            buffer.length - (magicBytes.length + 1), magicBytes.length);
+            buffer.length - magicBytes.length - 1, buffer.length - 1);
+        //print('magicBytesBuffer $magicBytesBuffer, magicBytes $magicBytes, ');
         if (magicBytesBuffer.toString() == magicBytes.toString()) {
+          var frameType = buffer.sublist(buffer.length - 1)[0];
+          print('skip uncrypted frame, type $frameType');
           var finalBuffer = BytesBuilder();
           finalBuffer.add(Uint8List.fromList(
               buffer.sublist(0, buffer.length - (magicBytes.length + 1))));