Function http2_settings_parameter_is_valid

src/proxy/http2/HTTP2.cc:131–163

}

bool
http2_settings_parameter_is_valid(const Http2SettingsParameter &param)
{
  // Static maximum values for Settings parameters.
  static const uint32_t settings_max[HTTP2_SETTINGS_MAX] = {
    0,
    UINT_MAX,              // HTTP2_SETTINGS_HEADER_TABLE_SIZE
    1,                     // HTTP2_SETTINGS_ENABLE_PUSH
    UINT_MAX,              // HTTP2_SETTINGS_MAX_CONCURRENT_STREAMS
    HTTP2_MAX_WINDOW_SIZE, // HTTP2_SETTINGS_INITIAL_WINDOW_SIZE
    16777215,              // HTTP2_SETTINGS_MAX_FRAME_SIZE
    UINT_MAX,              // HTTP2_SETTINGS_MAX_HEADER_LIST_SIZE
  };

  if (param.id == 0 || param.id >= HTTP2_SETTINGS_MAX) {
    // Do nothing - 6.5.2 Unsupported parameters MUST be ignored
    return true;
  }

  if (param.value > settings_max[param.id]) {
    return false;
  }

  if (param.id == HTTP2_SETTINGS_ENABLE_PUSH && param.value != 0 && param.value != 1) {
    return false;
  }

  if (param.id == HTTP2_SETTINGS_MAX_FRAME_SIZE && (param.value < (1 << 14) || param.value > (1 << 24) - 1)) {
    return false;
  }

  return true;
}

// 4.1.  Frame Format
//