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// Copyright (c) 2009 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "net/base/network_change_notifier_win.h"
#include <iphlpapi.h>
#include <windows.h>
#include <winsock2.h>
#include "base/basictypes.h"
#include "base/compiler_specific.h"
#include "base/logging.h"
#include "base/object_watcher.h"
namespace net {
class NetworkChangeNotifierWin::Impl
: public base::ObjectWatcher::Delegate {
public:
explicit Impl(NetworkChangeNotifierWin* notifier);
virtual ~Impl();
void WatchForAddressChange();
// ObjectWatcher::Delegate methods:
virtual void OnObjectSignaled(HANDLE object);
private:
NetworkChangeNotifierWin* const notifier_;
base::ObjectWatcher addr_watcher_;
OVERLAPPED addr_overlapped_;
DISALLOW_COPY_AND_ASSIGN(Impl);
};
NetworkChangeNotifierWin::Impl::Impl(NetworkChangeNotifierWin* notifier)
: notifier_(notifier) {
memset(&addr_overlapped_, 0, sizeof(addr_overlapped_));
addr_overlapped_.hEvent = WSACreateEvent();
}
NetworkChangeNotifierWin::Impl::~Impl() {
CancelIPChangeNotify(&addr_overlapped_);
addr_watcher_.StopWatching();
WSACloseEvent(addr_overlapped_.hEvent);
memset(&addr_overlapped_, 0, sizeof(addr_overlapped_));
}
void NetworkChangeNotifierWin::Impl::WatchForAddressChange() {
HANDLE handle = NULL;
DWORD ret = NotifyAddrChange(&handle, &addr_overlapped_);
CHECK(ret == ERROR_IO_PENDING);
addr_watcher_.StartWatching(addr_overlapped_.hEvent, this);
}
void NetworkChangeNotifierWin::Impl::OnObjectSignaled(HANDLE object) {
notifier_->OnIPAddressChanged();
// Start watching for further address changes.
WatchForAddressChange();
}
NetworkChangeNotifierWin::NetworkChangeNotifierWin()
: impl_(new Impl(ALLOW_THIS_IN_INITIALIZER_LIST(this))) {
impl_->WatchForAddressChange();
}
NetworkChangeNotifierWin::~NetworkChangeNotifierWin() {}
} // namespace net
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