NetworkConnectivityService.h

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/* This Source Code Form is subject to the terms of the Mozilla Public

 * License, v. 2.0. If a copy of the MPL was not distributed with this

 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */

#ifndef NetworkConnectivityService_h_

#define NetworkConnectivityService_h_

#include "nsINetworkConnectivityService.h"

#include "nsCOMPtr.h"

#include "nsIObserver.h"

#include "nsIDNSListener.h"

#include "nsIStreamListener.h"

#include "mozilla/net/DNS.h"

#include "mozilla/Mutex.h"

namespace mozilla {

namespace net {

class NetworkConnectivityService : public nsINetworkConnectivityService,

                                   public nsIObserver,

                                   public nsIDNSListener,

                                   public nsIStreamListener {

 public:

  NS_DECL_ISUPPORTS

  NS_DECL_NSINETWORKCONNECTIVITYSERVICE

  NS_DECL_NSIOBSERVER

  NS_DECL_NSIDNSLISTENER

  NS_DECL_NSISTREAMLISTENER

  NS_DECL_NSIREQUESTOBSERVER

  already_AddRefed<AddrInfo> MapNAT64IPs(AddrInfo* aNewRRSet);

  static already_AddRefed<NetworkConnectivityService> GetSingleton();

 private:

  NetworkConnectivityService() = default;

  virtual ~NetworkConnectivityService() = default;

  nsresult Init();

  // Calls all the check methods

  void PerformChecks();

  void SaveNAT64Prefixes(nsIDNSRecord* aRecord);

  already_AddRefed<nsIChannel> SetupIPCheckChannel(bool ipv4);

  // Will be set to OK if the DNS request returned in IP of this type,

  //                NOT_AVAILABLE if that type of resolution is not available

  //                UNKNOWN if the check wasn't performed

  Atomic<ConnectivityState, Relaxed> mDNSv4{ConnectivityState::UNKNOWN};

  Atomic<ConnectivityState, Relaxed> mDNSv6{ConnectivityState::UNKNOWN};

  Atomic<ConnectivityState, Relaxed> mDNS_HTTPS{ConnectivityState::UNKNOWN};

  Atomic<ConnectivityState, Relaxed> mIPv4{ConnectivityState::UNKNOWN};

  Atomic<ConnectivityState, Relaxed> mIPv6{ConnectivityState::UNKNOWN};

  Atomic<ConnectivityState, Relaxed> mNAT64{ConnectivityState::UNKNOWN};

  nsTArray<NetAddr> mNAT64Prefixes{ConnectivityState::UNKNOWN};

  nsCOMPtr<nsICancelable> mDNSv4Request;

  nsCOMPtr<nsICancelable> mDNSv6Request;

  nsCOMPtr<nsICancelable> mDNS_HTTPSRequest;

  nsCOMPtr<nsICancelable> mNAT64Request;

  nsCOMPtr<nsIChannel> mIPv4Channel;

  nsCOMPtr<nsIChannel> mIPv6Channel;

  bool mCheckedNetworkId = false;

  bool mHasNetworkId = false;

  Mutex mLock MOZ_UNANNOTATED{"nat64prefixes"};

};

}  // namespace net

}  // namespace mozilla

#endif  // NetworkConnectivityService_h_