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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_CLIENT_INTERFACE_IMPL_H_
18 #define WIFICOND_CLIENT_INTERFACE_IMPL_H_
19 
20 #include <array>
21 #include <string>
22 
23 #include <linux/if_ether.h>
24 
25 #include <android-base/macros.h>
26 #include <utils/StrongPointer.h>
27 #include <wifi_system/interface_tool.h>
28 
29 #include "android/net/wifi/IClientInterface.h"
30 #include "android/net/wifi/ISendMgmtFrameEvent.h"
31 #include "wificond/net/mlme_event_handler.h"
32 #include "wificond/net/netlink_utils.h"
33 #include "wificond/scanning/offload/offload_service_utils.h"
34 #include "wificond/scanning/scanner_impl.h"
35 
36 namespace android {
37 namespace wificond {
38 
39 class ClientInterfaceBinder;
40 class ClientInterfaceImpl;
41 class ScanUtils;
42 
43 class MlmeEventHandlerImpl : public MlmeEventHandler {
44  public:
45   MlmeEventHandlerImpl(ClientInterfaceImpl* client_interface);
46   ~MlmeEventHandlerImpl() override;
47   void OnConnect(std::unique_ptr<MlmeConnectEvent> event) override;
48   void OnRoam(std::unique_ptr<MlmeRoamEvent> event) override;
49   void OnAssociate(std::unique_ptr<MlmeAssociateEvent> event) override;
50   void OnDisconnect(std::unique_ptr<MlmeDisconnectEvent> event) override;
51   void OnDisassociate(std::unique_ptr<MlmeDisassociateEvent> event) override;
52 
53  private:
54   ClientInterfaceImpl* client_interface_;
55 };
56 
57 // Holds the guts of how we control network interfaces capable of connecting to
58 // access points via wpa_supplicant.
59 //
60 // Because remote processes may hold on to the corresponding
61 // binder object past the lifetime of the local object, we are forced to
62 // keep this object separate from the binder representation of itself.
63 class ClientInterfaceImpl {
64  public:
65   ClientInterfaceImpl(
66       uint32_t wiphy_index,
67       const std::string& interface_name,
68       uint32_t interface_index,
69       const std::array<uint8_t, ETH_ALEN>& interface_mac_addr,
70       android::wifi_system::InterfaceTool* if_tool,
71       NetlinkUtils* netlink_utils,
72       ScanUtils* scan_utils);
73   virtual ~ClientInterfaceImpl();
74 
75   // Get a pointer to the binder representing this ClientInterfaceImpl.
76   android::sp<android::net::wifi::IClientInterface> GetBinder() const;
77 
78   bool GetPacketCounters(std::vector<int32_t>* out_packet_counters);
79   bool SignalPoll(std::vector<int32_t>* out_signal_poll_results);
80   const std::array<uint8_t, ETH_ALEN>& GetMacAddress();
GetInterfaceName()81   const std::string& GetInterfaceName() const { return interface_name_; }
GetScanner()82   const android::sp<ScannerImpl> GetScanner() { return scanner_; };
83   bool SetMacAddress(const std::array<uint8_t, ETH_ALEN>& mac);
84   virtual bool IsAssociated() const;
85   void Dump(std::stringstream* ss) const;
86   void SendMgmtFrame(
87       const std::vector<uint8_t>& frame,
88       const sp<::android::net::wifi::ISendMgmtFrameEvent>& callback,
89       int32_t mcs);
90 
91  private:
92   bool RefreshAssociateFreq();
93 
94   const uint32_t wiphy_index_;
95   const std::string interface_name_;
96   const uint32_t interface_index_;
97   const std::array<uint8_t, ETH_ALEN> interface_mac_addr_;
98   android::wifi_system::InterfaceTool* const if_tool_;
99   NetlinkUtils* const netlink_utils_;
100   ScanUtils* const scan_utils_;
101   const std::shared_ptr<OffloadServiceUtils> offload_service_utils_;
102   const std::unique_ptr<MlmeEventHandlerImpl> mlme_event_handler_;
103   const android::sp<ClientInterfaceBinder> binder_;
104   android::sp<ScannerImpl> scanner_;
105 
106   // Cached information for this connection.
107   bool is_associated_;
108   std::array<uint8_t, ETH_ALEN> bssid_;
109   uint32_t associate_freq_;
110 
111   // Capability information for this wiphy/interface.
112   BandInfo band_info_;
113   ScanCapabilities scan_capabilities_;
114   WiphyFeatures wiphy_features_;
115 
116   // handler for frame tx status messages
117   bool frame_tx_in_progress_;
118   uint64_t frame_tx_status_cookie_;
119   std::function<void(bool was_acked)> on_frame_tx_status_event_handler_;
120 
121   DISALLOW_COPY_AND_ASSIGN(ClientInterfaceImpl);
122   friend class MlmeEventHandlerImpl;
123 };
124 
125 }  // namespace wificond
126 }  // namespace android
127 
128 #endif  // WIFICOND_CLIENT_INTERFACE_IMPL_H_
129