1/*
2 * Copyright (C) 2016 The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 *      http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17#ifndef WIFICOND_SERVER_H_
18#define WIFICOND_SERVER_H_
19
20#include <memory>
21#include <string>
22#include <vector>
23
24#include <android-base/macros.h>
25#include <wifi_system/interface_tool.h>
26
27#include "android/net/wifi/BnWificond.h"
28#include "android/net/wifi/IApInterface.h"
29#include "android/net/wifi/IClientInterface.h"
30#include "android/net/wifi/IInterfaceEventCallback.h"
31
32#include "wificond/ap_interface_impl.h"
33#include "wificond/client_interface_impl.h"
34
35namespace android {
36namespace wificond {
37
38class NL80211Packet;
39class NetlinkUtils;
40class ScanUtils;
41
42struct InterfaceInfo;
43
44class Server : public android::net::wifi::BnWificond {
45 public:
46  Server(std::unique_ptr<wifi_system::InterfaceTool> if_tool,
47         std::unique_ptr<wifi_system::SupplicantManager> supplicant_man,
48         std::unique_ptr<wifi_system::HostapdManager> hostapd_man,
49         NetlinkUtils* netlink_utils,
50         ScanUtils* scan_utils);
51  ~Server() override = default;
52
53  android::binder::Status RegisterCallback(
54      const android::sp<android::net::wifi::IInterfaceEventCallback>&
55          callback) override;
56  android::binder::Status UnregisterCallback(
57      const android::sp<android::net::wifi::IInterfaceEventCallback>&
58          callback) override;
59
60  android::binder::Status createApInterface(
61      android::sp<android::net::wifi::IApInterface>*
62          created_interface) override;
63
64  android::binder::Status createClientInterface(
65      android::sp<android::net::wifi::IClientInterface>*
66          created_interface) override;
67
68  android::binder::Status tearDownInterfaces() override;
69
70  android::binder::Status GetClientInterfaces(
71      std::vector<android::sp<android::IBinder>>* out_client_ifs) override;
72  android::binder::Status GetApInterfaces(
73      std::vector<android::sp<android::IBinder>>* out_ap_ifs) override;
74  status_t dump(int fd, const Vector<String16>& args) override;
75
76  // Call this once on startup.  It ignores all the invariants held
77  // in wificond and tries to restore ourselves to a blank state by
78  // killing userspace daemons and cleaning up the interface state.
79  void CleanUpSystemState();
80
81 private:
82  // Request interface information from kernel and setup local interface object.
83  // This assumes that interface should be in STATION mode. Even if we setup
84  // interface on behalf of createApInterace(), it is Hostapd that configure
85  // the interface to Ap mode later.
86  // Returns true on success, false otherwise.
87  bool SetupInterface(InterfaceInfo* interface);
88  bool RefreshWiphyIndex();
89  void LogSupportedBands();
90  void OnRegDomainChanged(std::string& country_code);
91  void BroadcastClientInterfaceReady(
92      android::sp<android::net::wifi::IClientInterface> network_interface);
93  void BroadcastApInterfaceReady(
94      android::sp<android::net::wifi::IApInterface> network_interface);
95  void BroadcastClientInterfaceTornDown(
96      android::sp<android::net::wifi::IClientInterface> network_interface);
97  void BroadcastApInterfaceTornDown(
98      android::sp<android::net::wifi::IApInterface> network_interface);
99  void MarkDownAllInterfaces();
100
101  const std::unique_ptr<wifi_system::InterfaceTool> if_tool_;
102  const std::unique_ptr<wifi_system::SupplicantManager> supplicant_manager_;
103  const std::unique_ptr<wifi_system::HostapdManager> hostapd_manager_;
104  NetlinkUtils* const netlink_utils_;
105  ScanUtils* const scan_utils_;
106
107  uint32_t wiphy_index_;
108  std::vector<std::unique_ptr<ApInterfaceImpl>> ap_interfaces_;
109  std::vector<std::unique_ptr<ClientInterfaceImpl>> client_interfaces_;
110  std::vector<android::sp<android::net::wifi::IInterfaceEventCallback>>
111      interface_event_callbacks_;
112
113  // Cached interface list from kernel.
114  std::vector<InterfaceInfo> interfaces_;
115
116  DISALLOW_COPY_AND_ASSIGN(Server);
117};
118
119}  // namespace wificond
120}  // namespace android
121
122#endif  // WIFICOND_SERVER_H_
123