buffer[i] = (bufferInt xor keyInt).toByte()

          i++
          keyIndex++
        }
      }
    } while (cursor.next() != -1)
  }

  fun closeCodeExceptionMessage(code: Int): String? =
    if (code < 1000 || code >= 5000) {
      "Code must be in range [1000,5000): $code"
    } else if (code in 1004..1006 || code in 1015..2999) {

        } else if (bufferSize != 0L) {
          code = controlFrameBuffer.readShort().toInt()
          reason = controlFrameBuffer.readUtf8()
          val codeExceptionMessage = WebSocketProtocol.closeCodeExceptionMessage(code)
          if (codeExceptionMessage != null) throw ProtocolException(codeExceptionMessage)
        }
        frameCallback.onReadClose(code, reason)
        receivedCloseFrame = true
      }