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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.
#ifndef NET_BASE_NETWORK_CHANGE_NOTIFIER_LINUX_H_
#define NET_BASE_NETWORK_CHANGE_NOTIFIER_LINUX_H_
#include "base/basictypes.h"
#include "base/message_loop.h"
#include "net/base/network_change_notifier_helper.h"
namespace net {
class NetworkChangeNotifierLinux
: public NetworkChangeNotifier, public MessageLoopForIO::Watcher {
public:
NetworkChangeNotifierLinux();
// NetworkChangeNotifier methods:
virtual void AddObserver(Observer* observer) {
helper_.AddObserver(observer);
}
virtual void RemoveObserver(Observer* observer) {
helper_.RemoveObserver(observer);
}
// MessageLoopForIO::Watcher methods:
virtual void OnFileCanReadWithoutBlocking(int fd);
virtual void OnFileCanWriteWithoutBlocking(int /* fd */);
private:
virtual ~NetworkChangeNotifierLinux();
// Starts listening for netlink messages. Also handles the messages if there
// are any available on the netlink socket.
void ListenForNotifications();
// Attempts to read from the netlink socket into |buf| of length |len|.
// Returns the bytes read on synchronous success and ERR_IO_PENDING if the
// recv() would block. Otherwise, it returns a net error code.
int ReadNotificationMessage(char* buf, size_t len);
// Handles the netlink message and notifies the observers.
void HandleNotifications(const char* buf, size_t len);
internal::NetworkChangeNotifierHelper helper_;
int netlink_fd_; // This is the netlink socket descriptor.
MessageLoopForIO* const loop_;
MessageLoopForIO::FileDescriptorWatcher netlink_watcher_;
DISALLOW_COPY_AND_ASSIGN(NetworkChangeNotifierLinux);
};
} // namespace net
#endif // NET_BASE_NETWORK_CHANGE_NOTIFIER_LINUX_H_
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