packet_body_start_pre_method_size = [
      0x00, 0x01, 0x00, 0x00, 0x00, 0xff, 0xff, 0xff,
      0xff, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
      0x00, 0x15, 0x14, 0x00, 0x00, 0x00, 0x12
    ]