nsNotifyAddrListener.h

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/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*- */

/* vim:set et sw=2 ts=4: */

/* 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 NSNOTIFYADDRLISTENER_H_

#define NSNOTIFYADDRLISTENER_H_

#include <windows.h>

#include <winsock2.h>

#include <iptypes.h>

#include "nsINetworkLinkService.h"

#include "nsIRunnable.h"

#include "nsIObserver.h"

#include "nsString.h"

#include "nsTArray.h"

#include "nsThreadUtils.h"

#include "nsThreadPool.h"

#include "nsCOMPtr.h"

#include "mozilla/Atomics.h"

#include "mozilla/TimeStamp.h"

#include "mozilla/Mutex.h"

#include "mozilla/SHA1.h"

#include "mozilla/net/DNS.h"

class nsIThreadPool;

class nsNotifyAddrListener : public nsINetworkLinkService,

                             public nsIRunnable,

                             public nsIObserver {

  virtual ~nsNotifyAddrListener();

 public:

  NS_DECL_THREADSAFE_ISUPPORTS

  NS_DECL_NSINETWORKLINKSERVICE

  NS_DECL_NSIRUNNABLE

  NS_DECL_NSIOBSERVER

  nsNotifyAddrListener();

  nsresult Init(void);

  void CheckLinkStatus(void);

  static void HashSortedNetworkIds(const std::vector<GUID> nwGUIDS,

                                   mozilla::SHA1Sum& sha1);

 protected:

  bool mLinkUp;

  bool mStatusKnown;

  bool mCheckAttempted;

  nsresult Shutdown(void);

  nsresult NotifyObservers(const char* aTopic, const char* aData);

  DWORD CheckAdaptersAddresses(void);

  // This threadpool only ever holds 1 thread. It is a threadpool and not a

  // regular thread so that we may call shutdownWithTimeout on it.

  nsCOMPtr<nsIThreadPool> mThread;

 private:

  // Returns the new timeout period for coalescing (or INFINITE)

  DWORD nextCoalesceWaitTime();

  // Called for every detected network change

  nsresult NetworkChanged();

  // Figure out the current network identification

  void calculateNetworkId(void);

  bool findMac(char* gateway);

  mozilla::Mutex mMutex MOZ_UNANNOTATED;

  nsCString mNetworkId;

  nsTArray<nsCString> mDnsSuffixList;

  nsTArray<mozilla::net::NetAddr> mDNSResolvers;

  HANDLE mCheckEvent;

  // set true when mCheckEvent means shutdown

  mozilla::Atomic<bool> mShutdown;

  // Contains a set of flags that codify the reasons for which

  // the platform indicates DNS should be used instead of TRR.

  mozilla::Atomic<uint32_t, mozilla::Relaxed> mPlatformDNSIndications;

  // This is a checksum of various meta data for all network interfaces

  // considered UP at last check.

  ULONG mIPInterfaceChecksum;

  // start time of the checking

  mozilla::TimeStamp mStartTime;

  // Flag set while coalescing change events

  bool mCoalescingActive;

  // Time stamp for first event during coalescing

  mozilla::TimeStamp mChangeTime;

};

#endif /* NSNOTIFYADDRLISTENER_H_ */