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