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/netlink_utils.h"
  27 #include "wificond/scanning/scan_result.h"
  28 #include "wificond/scanning/scan_utils.h"
  29
  30 using android::net::wifi::IClientInterface;
  31 using android::sp;
  32 using android::wifi_system::InterfaceTool;
  33 using android::wifi_system::SupplicantManager;
  34
  35 using namespace std::placeholders;
  36 using std::string;
  37 using std::unique_ptr;
  38 using std::vector;
  39
  40 namespace android {
  41 namespace wificond {
  42
  43 ClientInterfaceImpl::ClientInterfaceImpl(
  44     const std::string& interface_name,
  45     uint32_t interface_index,
  46     const std::vector<uint8_t>& interface_mac_addr,
  47     InterfaceTool* if_tool,
  48     SupplicantManager* supplicant_manager,
  49     NetlinkUtils* netlink_utils,
  50     ScanUtils* scan_utils)
  51     : interface_name_(interface_name),
  52       interface_index_(interface_index),
  53       interface_mac_addr_(interface_mac_addr),
  54       if_tool_(if_tool),
  55       supplicant_manager_(supplicant_manager),
  56       netlink_utils_(netlink_utils),
  57       scan_utils_(scan_utils),
  58       binder_(new ClientInterfaceBinder(this)) {
  59   scan_utils_->SubscribeScanResultNotification(
  60       interface_index_,
  61       std::bind(&ClientInterfaceImpl::OnScanResultsReady,
  62                 this,
  63                 _1, _2, _3, _4));
  64 }
  65
  66 ClientInterfaceImpl::~ClientInterfaceImpl() {
  67   binder_->NotifyImplDead();
  68   DisableSupplicant();
  69   scan_utils_->UnsubscribeScanResultNotification(interface_index_);
  70   if_tool_->SetUpState(interface_name_.c_str(), false);
  71 }
  72
  73 sp<android::net::wifi::IClientInterface> ClientInterfaceImpl::GetBinder() const {
  74   return binder_;
  75 }
  76
  77 bool ClientInterfaceImpl::EnableSupplicant() {
  78   return supplicant_manager_->StartSupplicant();
  79 }
  80
  81 bool ClientInterfaceImpl::DisableSupplicant() {
  82   return supplicant_manager_->StopSupplicant();
  83 }
  84
  85 bool ClientInterfaceImpl::GetPacketCounters(vector<int32_t>* out_packet_counters) {
  86   StationInfo station_info;
  87   if (!netlink_utils_->GetStationInfo(interface_index_,
  88                                       interface_mac_addr_,
  89                                       &station_info)) {
  90     return false;
  91   }
  92   out_packet_counters->push_back(station_info.station_tx_packets);
  93   out_packet_counters->push_back(station_info.station_tx_failed);
  94
  95   return true;
  96 }
  97
  98 bool ClientInterfaceImpl::SignalPoll(vector<int32_t>* out_signal_poll_results) {
  99   StationInfo station_info;
 100   if (!netlink_utils_->GetStationInfo(interface_index_,
 101                                       interface_mac_addr_,
 102                                       &station_info)) {
 103     return false;
 104   }
 105   out_signal_poll_results->push_back(
 106       static_cast<int32_t>(station_info.current_rssi));
 107   // Convert from 100kbit/s to Mbps.
 108   out_signal_poll_results->push_back(
 109       static_cast<int32_t>(station_info.station_tx_bitrate/10));
 110
 111   return true;
 112 }
 113
 114 const vector<uint8_t>& ClientInterfaceImpl::GetMacAddress() {
 115   return interface_mac_addr_;
 116 }
 117
 118 void ClientInterfaceImpl::OnScanResultsReady(
 119                          uint32_t interface_index,
 120                          bool aborted,
 121                          std::vector<std::vector<uint8_t>>& ssids,
 122                          std::vector<uint32_t>& frequencies) {
 123   if (aborted) {
 124     LOG(ERROR) << "Scan aborted";
 125     return;
 126   }
 127   vector<ScanResult> scan_results;
 128   // TODO(nywang): Find a way to differentiate scan results for
 129   // internel/external scan request. This is useful when location is
 130   // scanning using regular NL80211 commands.
 131   scan_utils_->GetScanResult(interface_index, &scan_results);
 132   // TODO(nywang): Send these scan results back to java framework.
 133 }
 134
 135 }  // namespace wificond
 136 }  // namespace android