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/offload/offload_service_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::endl;
  39 using std::string;
  40 using std::unique_ptr;
  41 using std::vector;
  42
  43 namespace android {
  44 namespace wificond {
  45
  46 MlmeEventHandlerImpl::MlmeEventHandlerImpl(ClientInterfaceImpl* client_interface)
  47     : client_interface_(client_interface) {
  48 }
  49
  50 MlmeEventHandlerImpl::~MlmeEventHandlerImpl() {
  51 }
  52
  53 void MlmeEventHandlerImpl::OnConnect(unique_ptr<MlmeConnectEvent> event) {
  54   if (!event->IsTimeout() && event->GetStatusCode() == 0) {
  55     client_interface_->is_associated_ = true;
  56     client_interface_->RefreshAssociateFreq();
  57     client_interface_->bssid_ = event->GetBSSID();
  58   } else {
  59     if (event->IsTimeout()) {
  60       LOG(INFO) << "Connect timeout";
  61     }
  62     client_interface_->is_associated_ = false;
  63     client_interface_->bssid_.clear();
  64   }
  65 }
  66
  67 void MlmeEventHandlerImpl::OnRoam(unique_ptr<MlmeRoamEvent> event) {
  68   if (event->GetStatusCode() == 0) {
  69     client_interface_->is_associated_ = true;
  70     client_interface_->RefreshAssociateFreq();
  71     client_interface_->bssid_ = event->GetBSSID();
  72   } else {
  73     client_interface_->is_associated_ = false;
  74     client_interface_->bssid_.clear();
  75   }
  76 }
  77
  78 void MlmeEventHandlerImpl::OnAssociate(unique_ptr<MlmeAssociateEvent> event) {
  79   if (!event->IsTimeout() && event->GetStatusCode() == 0) {
  80     client_interface_->is_associated_ = true;
  81     client_interface_->RefreshAssociateFreq();
  82     client_interface_->bssid_ = event->GetBSSID();
  83   } else {
  84     if (event->IsTimeout()) {
  85       LOG(INFO) << "Associate timeout";
  86     }
  87     client_interface_->is_associated_ = false;
  88     client_interface_->bssid_.clear();
  89   }
  90 }
  91
  92 void MlmeEventHandlerImpl::OnDisconnect(unique_ptr<MlmeDisconnectEvent> event) {
  93   client_interface_->is_associated_ = false;
  94   client_interface_->bssid_.clear();
  95 }
  96
  97 void MlmeEventHandlerImpl::OnDisassociate(unique_ptr<MlmeDisassociateEvent> event) {
  98   client_interface_->is_associated_ = false;
  99   client_interface_->bssid_.clear();
 100 }
 101
 102
 103 ClientInterfaceImpl::ClientInterfaceImpl(
 104     uint32_t wiphy_index,
 105     const std::string& interface_name,
 106     uint32_t interface_index,
 107     const std::vector<uint8_t>& interface_mac_addr,
 108     InterfaceTool* if_tool,
 109     SupplicantManager* supplicant_manager,
 110     NetlinkUtils* netlink_utils,
 111     ScanUtils* scan_utils)
 112     : wiphy_index_(wiphy_index),
 113       interface_name_(interface_name),
 114       interface_index_(interface_index),
 115       interface_mac_addr_(interface_mac_addr),
 116       if_tool_(if_tool),
 117       supplicant_manager_(supplicant_manager),
 118       netlink_utils_(netlink_utils),
 119       scan_utils_(scan_utils),
 120       offload_service_utils_(new OffloadServiceUtils()),
 121       mlme_event_handler_(new MlmeEventHandlerImpl(this)),
 122       binder_(new ClientInterfaceBinder(this)),
 123       is_associated_(false) {
 124   netlink_utils_->SubscribeMlmeEvent(
 125       interface_index_,
 126       mlme_event_handler_.get());
 127   if (!netlink_utils_->GetWiphyInfo(wiphy_index_,
 128                                &band_info_,
 129                                &scan_capabilities_,
 130                                &wiphy_features_)) {
 131     LOG(ERROR) << "Failed to get wiphy info from kernel";
 132   }
 133   LOG(INFO) << "create scanner for interface with index: "
 134             << (int)interface_index_;
 135   scanner_ = new ScannerImpl(wiphy_index,
 136                              interface_index_,
 137                              scan_capabilities_,
 138                              wiphy_features_,
 139                              this,
 140                              netlink_utils_,
 141                              scan_utils_,
 142                              offload_service_utils_);
 143 }
 144
 145 ClientInterfaceImpl::~ClientInterfaceImpl() {
 146   binder_->NotifyImplDead();
 147   scanner_->Invalidate();
 148   DisableSupplicant();
 149   netlink_utils_->UnsubscribeMlmeEvent(interface_index_);
 150   if_tool_->SetUpState(interface_name_.c_str(), false);
 151 }
 152
 153 sp<android::net::wifi::IClientInterface> ClientInterfaceImpl::GetBinder() const {
 154   return binder_;
 155 }
 156
 157 void ClientInterfaceImpl::Dump(std::stringstream* ss) const {
 158   *ss << "------- Dump of client interface with index: "
 159       << interface_index_ << " and name: " << interface_name_
 160       << "-------" << endl;
 161   *ss << "Max number of ssids for single shot scan: "
 162       << static_cast<int>(scan_capabilities_.max_num_scan_ssids) << endl;
 163   *ss << "Max number of ssids for scheduled scan: "
 164       << static_cast<int>(scan_capabilities_.max_num_sched_scan_ssids) << endl;
 165   *ss << "Max number of match sets for scheduled scan: "
 166       << static_cast<int>(scan_capabilities_.max_match_sets) << endl;
 167   *ss << "Maximum number of scan plans: "
 168       << scan_capabilities_.max_num_scan_plans << endl;
 169   *ss << "Max scan plan interval in seconds: "
 170       << scan_capabilities_.max_scan_plan_interval << endl;
 171   *ss << "Max scan plan iterations: "
 172       << scan_capabilities_.max_scan_plan_iterations << endl;
 173   *ss << "Device supports random MAC for single shot scan: "
 174       << wiphy_features_.supports_random_mac_oneshot_scan << endl;
 175   *ss << "Device supports random MAC for scheduled scan: "
 176       << wiphy_features_.supports_random_mac_sched_scan << endl;
 177   *ss << "------- Dump End -------" << endl;
 178 }
 179
 180 bool ClientInterfaceImpl::EnableSupplicant() {
 181   return supplicant_manager_->StartSupplicant();
 182 }
 183
 184 bool ClientInterfaceImpl::DisableSupplicant() {
 185   return supplicant_manager_->StopSupplicant();
 186 }
 187
 188 bool ClientInterfaceImpl::GetPacketCounters(vector<int32_t>* out_packet_counters) {
 189   StationInfo station_info;
 190   if (!netlink_utils_->GetStationInfo(interface_index_,
 191                                       interface_mac_addr_,
 192                                       &station_info)) {
 193     return false;
 194   }
 195   out_packet_counters->push_back(station_info.station_tx_packets);
 196   out_packet_counters->push_back(station_info.station_tx_failed);
 197
 198   return true;
 199 }
 200
 201 bool ClientInterfaceImpl::SignalPoll(vector<int32_t>* out_signal_poll_results) {
 202   StationInfo station_info;
 203   if (!netlink_utils_->GetStationInfo(interface_index_,
 204                                       bssid_,
 205                                       &station_info)) {
 206     return false;
 207   }
 208   out_signal_poll_results->push_back(
 209       static_cast<int32_t>(station_info.current_rssi));
 210   // Convert from 100kbit/s to Mbps.
 211   out_signal_poll_results->push_back(
 212       static_cast<int32_t>(station_info.station_tx_bitrate/10));
 213   // Association frequency.
 214   out_signal_poll_results->push_back(
 215       static_cast<int32_t>(associate_freq_));
 216
 217   return true;
 218 }
 219
 220 const vector<uint8_t>& ClientInterfaceImpl::GetMacAddress() {
 221   return interface_mac_addr_;
 222 }
 223
 224 bool ClientInterfaceImpl::requestANQP(
 225       const ::std::vector<uint8_t>& bssid,
 226       const ::android::sp<::android::net::wifi::IANQPDoneCallback>& callback) {
 227   // TODO(nywang): query ANQP information from wpa_supplicant.
 228   return true;
 229 }
 230
 231 bool ClientInterfaceImpl::RefreshAssociateFreq() {
 232   // wpa_supplicant fetches associate frequency using the latest scan result.
 233   // We should follow the same method here before we find a better solution.
 234   std::vector<NativeScanResult> scan_results;
 235   if (!scan_utils_->GetScanResult(interface_index_, &scan_results)) {
 236     return false;
 237   }
 238   for (auto& scan_result : scan_results) {
 239     if (scan_result.associated) {
 240       associate_freq_ = scan_result.frequency;
 241     }
 242   }
 243   return false;
 244 }
 245
 246 bool ClientInterfaceImpl::IsAssociated() const {
 247   return is_associated_;
 248 }
 249
 250 }  // namespace wificond
 251 }  // namespace android