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//
// Copyright (C) 2014 The Android Open Source Project
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
//
#ifndef APMANAGER_DEVICE_INFO_H_
#define APMANAGER_DEVICE_INFO_H_
#include <map>
#include <string>
#include <base/callback.h>
#include <base/files/file_path.h>
#include <base/memory/ref_counted.h>
#include <base/memory/weak_ptr.h>
#include <gtest/gtest_prod.h> // for FRIEND_TEST
#include "apmanager/device.h"
namespace shill {
class NetlinkManager;
class Nl80211Message;
class RTNLHandler;
class RTNLMessage;
class RTNLListener;
} // namespace shill
namespace apmanager {
class ControlInterface;
class Manager;
// DeviceInfo will enumerate WiFi devices (PHYs) during startup and on-demand
// (when new interface is detected but the corresponding device is not
// enumerated). And use RTNL to monitor creation/deletion of WiFi interfaces.
class DeviceInfo : public base::SupportsWeakPtr<DeviceInfo> {
public:
explicit DeviceInfo(Manager* manager);
virtual ~DeviceInfo();
// Start and stop device detection monitoring.
void Start();
void Stop();
private:
friend class DeviceInfoTest;
static const char kDeviceInfoRoot[];
static const char kInterfaceUevent[];
static const char kInterfaceUeventWifiSignature[];
// Use nl80211 to enumerate available WiFi PHYs.
void EnumerateDevices();
void OnWiFiPhyInfoReceived(const shill::Nl80211Message& msg);
// Handler for RTNL link event.
void LinkMsgHandler(const shill::RTNLMessage& msg);
void AddLinkMsgHandler(const std::string& iface_name, int iface_index);
void DelLinkMsgHandler(const std::string& iface_name, int iface_index);
// Return true if the specify |iface_name| is a wifi interface, false
// otherwise.
bool IsWifiInterface(const std::string& iface_name);
// Return the contents of the device info file |path_name| for interface
// |iface_name| in output parameter |contents_out|. Return true if file
// read succeed, fales otherwise.
bool GetDeviceInfoContents(const std::string& iface_name,
const std::string& path_name,
std::string* contents_out);
// Use nl80211 to get WiFi interface information for interface on
// |iface_index|.
void GetWiFiInterfaceInfo(int iface_index);
void OnWiFiInterfaceInfoReceived(const shill::Nl80211Message& msg);
// Use nl80211 to get PHY info for interface on |iface_index|.
void GetWiFiInterfacePhyInfo(uint32_t iface_index);
void OnWiFiInterfacePhyInfoReceived(
uint32_t iface_index, const shill::Nl80211Message& msg);
scoped_refptr<Device> GetDevice(const std::string& phy_name);
void RegisterDevice(const scoped_refptr<Device>& device);
// Maps interface index to interface info
std::map<uint32_t, Device::WiFiInterface> interface_infos_;
// Maps device name to device object. Each device object represents a PHY.
std::map<std::string, scoped_refptr<Device>> devices_;
// RTNL link event callback and listener.
base::Callback<void(const shill::RTNLMessage&)> link_callback_;
std::unique_ptr<shill::RTNLListener> link_listener_;
base::FilePath device_info_root_;
Manager* manager_;
// Cache copy of singleton pointers.
shill::NetlinkManager* netlink_manager_;
shill::RTNLHandler* rtnl_handler_;
int device_identifier_;
DISALLOW_COPY_AND_ASSIGN(DeviceInfo);
};
} // namespace apmanager
#endif // APMANAGER_DEVICE_INFO_H_
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