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
  24 #include "wificond/client_interface_binder.h"
  25 #include "wificond/net/mlme_event.h"
  26 #include "wificond/net/netlink_utils.h"
  27 #include "wificond/scanning/scan_result.h"
  28 #include "wificond/scanning/scan_utils.h"
  29 #include "wificond/scanning/scanner_impl.h"
  30
  31 using android::net::wifi::IClientInterface;
  32 using com::android::server::wifi::wificond::NativeScanResult;
  33 using android::sp;
  34 using android::wifi_system::InterfaceTool;
  35 using android::wifi_system::SupplicantManager;
  36
  37 using std::string;
  38 using std::unique_ptr;
  39 using std::vector;
  40
  41 namespace android {
  42 namespace wificond {
  43
  44 MlmeEventHandlerImpl::MlmeEventHandlerImpl(ClientInterfaceImpl* client_interface)
  45     : client_interface_(client_interface) {
  46 }
  47
  48 MlmeEventHandlerImpl::~MlmeEventHandlerImpl() {
  49 }
  50
  51 void MlmeEventHandlerImpl::OnConnect(unique_ptr<MlmeConnectEvent> event) {
  52   if (!event->IsTimeout() && event->GetStatusCode() == 0) {
  53     client_interface_->is_associated_ = true;
  54     client_interface_->RefreshAssociateFreq();
  55     client_interface_->bssid_ = event->GetBSSID();
  56   } else {
  57     if (event->IsTimeout()) {
  58       LOG(INFO) << "Connect timeout";
  59     }
  60     client_interface_->is_associated_ = false;
  61     client_interface_->bssid_.clear();
  62   }
  63 }
  64
  65 void MlmeEventHandlerImpl::OnRoam(unique_ptr<MlmeRoamEvent> event) {
  66   if (event->GetStatusCode() == 0) {
  67     client_interface_->is_associated_ = true;
  68     client_interface_->RefreshAssociateFreq();
  69     client_interface_->bssid_ = event->GetBSSID();
  70   } else {
  71     client_interface_->is_associated_ = false;
  72     client_interface_->bssid_.clear();
  73   }
  74 }
  75
  76 void MlmeEventHandlerImpl::OnAssociate(unique_ptr<MlmeAssociateEvent> event) {
  77   if (!event->IsTimeout() && event->GetStatusCode() == 0) {
  78     client_interface_->is_associated_ = true;
  79     client_interface_->RefreshAssociateFreq();
  80     client_interface_->bssid_ = event->GetBSSID();
  81   } else {
  82     if (event->IsTimeout()) {
  83       LOG(INFO) << "Associate timeout";
  84     }
  85     client_interface_->is_associated_ = false;
  86     client_interface_->bssid_.clear();
  87   }
  88 }
  89
  90 void MlmeEventHandlerImpl::OnDisconnect(unique_ptr<MlmeDisconnectEvent> event) {
  91   client_interface_->is_associated_ = false;
  92   client_interface_->bssid_.clear();
  93 }
  94
  95 void MlmeEventHandlerImpl::OnDisassociate(unique_ptr<MlmeDisassociateEvent> event) {
  96   client_interface_->is_associated_ = false;
  97   client_interface_->bssid_.clear();
  98 }
  99
 100
 101 ClientInterfaceImpl::ClientInterfaceImpl(
 102     uint32_t wiphy_index,
 103     const std::string& interface_name,
 104     uint32_t interface_index,
 105     const std::vector<uint8_t>& interface_mac_addr,
 106     InterfaceTool* if_tool,
 107     SupplicantManager* supplicant_manager,
 108     NetlinkUtils* netlink_utils,
 109     ScanUtils* scan_utils)
 110     : wiphy_index_(wiphy_index),
 111       interface_name_(interface_name),
 112       interface_index_(interface_index),
 113       interface_mac_addr_(interface_mac_addr),
 114       if_tool_(if_tool),
 115       supplicant_manager_(supplicant_manager),
 116       netlink_utils_(netlink_utils),
 117       scan_utils_(scan_utils),
 118       mlme_event_handler_(new MlmeEventHandlerImpl(this)),
 119       binder_(new ClientInterfaceBinder(this)),
 120       is_associated_(false) {
 121   netlink_utils_->SubscribeMlmeEvent(
 122       interface_index_,
 123       mlme_event_handler_.get());
 124   if (!netlink_utils_->GetWiphyInfo(wiphy_index_,
 125                                &band_info_,
 126                                &scan_capabilities_,
 127                                &wiphy_features_)) {
 128     LOG(ERROR) << "Failed to get wiphy info from kernel";
 129   }
 130   LOG(INFO) << "create scanner for interface with index: "
 131             << (int)interface_index_;
 132   scanner_ = new ScannerImpl(wiphy_index,
 133                              interface_index_,
 134                              scan_capabilities_,
 135                              wiphy_features_,
 136                              this,
 137                              netlink_utils_,
 138                              scan_utils_);
 139 }
 140
 141 ClientInterfaceImpl::~ClientInterfaceImpl() {
 142   binder_->NotifyImplDead();
 143   scanner_->Invalidate();
 144   DisableSupplicant();
 145   netlink_utils_->UnsubscribeMlmeEvent(interface_index_);
 146   if_tool_->SetUpState(interface_name_.c_str(), false);
 147 }
 148
 149 sp<android::net::wifi::IClientInterface> ClientInterfaceImpl::GetBinder() const {
 150   return binder_;
 151 }
 152
 153 bool ClientInterfaceImpl::EnableSupplicant() {
 154   return supplicant_manager_->StartSupplicant();
 155 }
 156
 157 bool ClientInterfaceImpl::DisableSupplicant() {
 158   return supplicant_manager_->StopSupplicant();
 159 }
 160
 161 bool ClientInterfaceImpl::GetPacketCounters(vector<int32_t>* out_packet_counters) {
 162   StationInfo station_info;
 163   if (!netlink_utils_->GetStationInfo(interface_index_,
 164                                       interface_mac_addr_,
 165                                       &station_info)) {
 166     return false;
 167   }
 168   out_packet_counters->push_back(station_info.station_tx_packets);
 169   out_packet_counters->push_back(station_info.station_tx_failed);
 170
 171   return true;
 172 }
 173
 174 bool ClientInterfaceImpl::SignalPoll(vector<int32_t>* out_signal_poll_results) {
 175   StationInfo station_info;
 176   if (!netlink_utils_->GetStationInfo(interface_index_,
 177                                       bssid_,
 178                                       &station_info)) {
 179     return false;
 180   }
 181   out_signal_poll_results->push_back(
 182       static_cast<int32_t>(station_info.current_rssi));
 183   // Convert from 100kbit/s to Mbps.
 184   out_signal_poll_results->push_back(
 185       static_cast<int32_t>(station_info.station_tx_bitrate/10));
 186   // Association frequency.
 187   out_signal_poll_results->push_back(
 188       static_cast<int32_t>(associate_freq_));
 189
 190   return true;
 191 }
 192
 193 const vector<uint8_t>& ClientInterfaceImpl::GetMacAddress() {
 194   return interface_mac_addr_;
 195 }
 196
 197 bool ClientInterfaceImpl::requestANQP(
 198       const ::std::vector<uint8_t>& bssid,
 199       const ::android::sp<::android::net::wifi::IANQPDoneCallback>& callback) {
 200   // TODO(nywang): query ANQP information from wpa_supplicant.
 201   return true;
 202 }
 203
 204 bool ClientInterfaceImpl::RefreshAssociateFreq() {
 205   // wpa_supplicant fetches associate frequency using the latest scan result.
 206   // We should follow the same method here before we find a better solution.
 207   std::vector<NativeScanResult> scan_results;
 208   if (!scan_utils_->GetScanResult(interface_index_, &scan_results)) {
 209     return false;
 210   }
 211   for (auto& scan_result : scan_results) {
 212     if (scan_result.associated) {
 213       associate_freq_ = scan_result.frequency;
 214     }
 215   }
 216   return false;
 217 }
 218
 219 bool ClientInterfaceImpl::IsAssociated() {
 220   return is_associated_;
 221 }
 222
 223 }  // namespace wificond
 224 }  // namespace android