client_interface_impl.cpp

   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 #include "wificond/client_interface_impl.h"
  18
  19 #include <vector>
  20
  21 #include <android-base/logging.h>
  22 #include <wifi_system/supplicant_manager.h>
  23 #include <wifi_system/wifi.h>
  24
  25 #include "wificond/client_interface_binder.h"
  26 #include "wificond/net/mlme_event.h"
  27 #include "wificond/net/netlink_utils.h"
  28 #include "wificond/scanning/scan_result.h"
  29 #include "wificond/scanning/scan_utils.h"
  30 #include "wificond/scanning/scanner_impl.h"
  31
  32 using android::net::wifi::IClientInterface;
  33 using com::android::server::wifi::wificond::NativeScanResult;
  34 using android::sp;
  35 using android::wifi_system::InterfaceTool;
  36 using android::wifi_system::SupplicantManager;
  37
  38 using std::string;
  39 using std::unique_ptr;
  40 using std::vector;
  41
  42 namespace android {
  43 namespace wificond {
  44
  45 MlmeEventHandlerImpl::MlmeEventHandlerImpl(ClientInterfaceImpl* client_interface)
  46     : client_interface_(client_interface) {
  47 }
  48
  49 MlmeEventHandlerImpl::~MlmeEventHandlerImpl() {
  50 }
  51
  52 void MlmeEventHandlerImpl::OnConnect(unique_ptr<MlmeConnectEvent> event) {
  53   if (event->GetStatusCode() == 0) {
  54     client_interface_->RefreshAssociateFreq();
  55     client_interface_->bssid_ = event->GetBSSID();
  56   }
  57 }
  58
  59 void MlmeEventHandlerImpl::OnRoam(unique_ptr<MlmeRoamEvent> event) {
  60   if (event->GetStatusCode() == 0) {
  61     client_interface_->RefreshAssociateFreq();
  62     client_interface_->bssid_ = event->GetBSSID();
  63   }
  64 }
  65
  66 void MlmeEventHandlerImpl::OnAssociate(unique_ptr<MlmeAssociateEvent> event) {
  67   if (event->GetStatusCode() == 0) {
  68     client_interface_->RefreshAssociateFreq();
  69     client_interface_->bssid_ = event->GetBSSID();
  70   }
  71 }
  72
  73 ClientInterfaceImpl::ClientInterfaceImpl(
  74     uint32_t wiphy_index,
  75     const std::string& interface_name,
  76     uint32_t interface_index,
  77     const std::vector<uint8_t>& interface_mac_addr,
  78     InterfaceTool* if_tool,
  79     SupplicantManager* supplicant_manager,
  80     NetlinkUtils* netlink_utils,
  81     ScanUtils* scan_utils)
  82     : wiphy_index_(wiphy_index),
  83       interface_name_(interface_name),
  84       interface_index_(interface_index),
  85       interface_mac_addr_(interface_mac_addr),
  86       if_tool_(if_tool),
  87       supplicant_manager_(supplicant_manager),
  88       netlink_utils_(netlink_utils),
  89       scan_utils_(scan_utils),
  90       mlme_event_handler_(new MlmeEventHandlerImpl(this)),
  91       binder_(new ClientInterfaceBinder(this)) {
  92   netlink_utils_->SubscribeMlmeEvent(
  93       interface_index_,
  94       mlme_event_handler_.get());
  95   if (!netlink_utils_->GetWiphyInfo(wiphy_index_,
  96                                &band_info_,
  97                                &scan_capabilities_,
  98                                &wiphy_features_)) {
  99     LOG(ERROR) << "Failed to get wiphy info from kernel";
 100   }
 101   LOG(INFO) << "create scanner for interface with index: "
 102             << (int)interface_index_;
 103   scanner_ = new ScannerImpl(interface_index_,
 104                              band_info_,
 105                              scan_capabilities_,
 106                              wiphy_features_,
 107                              scan_utils_);
 108 }
 109
 110 ClientInterfaceImpl::~ClientInterfaceImpl() {
 111   binder_->NotifyImplDead();
 112   scanner_->Invalidate();
 113   DisableSupplicant();
 114   netlink_utils_->UnsubscribeMlmeEvent(interface_index_);
 115   if_tool_->SetUpState(interface_name_.c_str(), false);
 116 }
 117
 118 sp<android::net::wifi::IClientInterface> ClientInterfaceImpl::GetBinder() const {
 119   return binder_;
 120 }
 121
 122 bool ClientInterfaceImpl::EnableSupplicant() {
 123   return supplicant_manager_->StartSupplicant();
 124 }
 125
 126 bool ClientInterfaceImpl::DisableSupplicant() {
 127   return supplicant_manager_->StopSupplicant();
 128 }
 129
 130 bool ClientInterfaceImpl::GetPacketCounters(vector<int32_t>* out_packet_counters) {
 131   StationInfo station_info;
 132   if (!netlink_utils_->GetStationInfo(interface_index_,
 133                                       interface_mac_addr_,
 134                                       &station_info)) {
 135     return false;
 136   }
 137   out_packet_counters->push_back(station_info.station_tx_packets);
 138   out_packet_counters->push_back(station_info.station_tx_failed);
 139
 140   return true;
 141 }
 142
 143 bool ClientInterfaceImpl::SignalPoll(vector<int32_t>* out_signal_poll_results) {
 144   StationInfo station_info;
 145   if (!netlink_utils_->GetStationInfo(interface_index_,
 146                                       bssid_,
 147                                       &station_info)) {
 148     return false;
 149   }
 150   out_signal_poll_results->push_back(
 151       static_cast<int32_t>(station_info.current_rssi));
 152   // Convert from 100kbit/s to Mbps.
 153   out_signal_poll_results->push_back(
 154       static_cast<int32_t>(station_info.station_tx_bitrate/10));
 155   // Association frequency.
 156   out_signal_poll_results->push_back(
 157       static_cast<int32_t>(associate_freq_));
 158
 159   return true;
 160 }
 161
 162 const vector<uint8_t>& ClientInterfaceImpl::GetMacAddress() {
 163   return interface_mac_addr_;
 164 }
 165
 166 bool ClientInterfaceImpl::requestANQP(
 167       const ::std::vector<uint8_t>& bssid,
 168       const ::android::sp<::android::net::wifi::IANQPDoneCallback>& callback) {
 169   // TODO(nywang): query ANQP information from wpa_supplicant.
 170   return true;
 171 }
 172
 173 bool ClientInterfaceImpl::RefreshAssociateFreq() {
 174   // wpa_supplicant fetches associate frequency using the latest scan result.
 175   // We should follow the same method here before we find a better solution.
 176   std::vector<NativeScanResult> scan_results;
 177   if (!scan_utils_->GetScanResult(interface_index_, &scan_results)) {
 178     return false;
 179   }
 180   for (auto& scan_result : scan_results) {
 181     if (scan_result.associated) {
 182       associate_freq_ = scan_result.frequency;
 183     }
 184   }
 185   return false;
 186 }
 187
 188 }  // namespace wificond
 189 }  // namespace android