text: /*
   *  Copyright 2004 The WebRTC Project Authors. All rights reserved.
   *
   *  Use of this source code is governed by a BSD-style license
   *  that can be found in the LICENSE file in the root of the source
   *  tree. An additional intellectual property rights grant can be found
   *  in the file PATENTS.  All contributing project authors may
   *  be found in the AUTHORS file in the root of the source tree.
   */
  
  #ifndef RTC_BASE_NETWORK_CONSTANTS_H_
  #define RTC_BASE_NETWORK_CONSTANTS_H_
  
  #include <stdint.h>
  
  #include <string>
  
  namespace rtc {
  
  constexpr uint16_t kNetworkCostMax = 999;
  constexpr uint16_t kNetworkCostCellular2G = 980;
  constexpr uint16_t kNetworkCostCellular3G = 910;
  constexpr uint16_t kNetworkCostCellular = 900;
  constexpr uint16_t kNetworkCostCellular4G = 500;
  constexpr uint16_t kNetworkCostCellular5G = 250;
  constexpr uint16_t kNetworkCostUnknown = 50;
  constexpr uint16_t kNetworkCostLow = 10;
  constexpr uint16_t kNetworkCostMin = 0;
  
  // alias
  constexpr uint16_t kNetworkCostHigh = kNetworkCostCellular;
  
  enum AdapterType {
    // This enum resembles the one in Chromium net::ConnectionType.
    ADAPTER_TYPE_UNKNOWN = 0,
    ADAPTER_TYPE_ETHERNET = 1 << 0,
    ADAPTER_TYPE_WIFI = 1 << 1,
    ADAPTER_TYPE_CELLULAR = 1 << 2,  // This is CELLULAR of unknown type.
    ADAPTER_TYPE_VPN = 1 << 3,
    ADAPTER_TYPE_LOOPBACK = 1 << 4,
    // ADAPTER_TYPE_ANY is used for a network, which only contains a single "any
    // address" IP address (INADDR_ANY for IPv4 or in6addr_any for IPv6), and can
    // use any/all network interfaces. Whereas ADAPTER_TYPE_UNKNOWN is used
    // when the network uses a specific interface/IP, but its interface type can
    // not be determined or not fit in this enum.
    ADAPTER_TYPE_ANY = 1 << 5,
    ADAPTER_TYPE_CELLULAR_2G = 1 << 6,
    ADAPTER_TYPE_CELLULAR_3G = 1 << 7,
    ADAPTER_TYPE_CELLULAR_4G = 1 << 8,
    ADAPTER_TYPE_CELLULAR_5G = 1 << 9
  };
  
  std::string AdapterTypeToString(AdapterType type);
  
  }  // namespace rtc
  
  #endif  // RTC_BASE_NETWORK_CONSTANTS_H_
  