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
MlmeEventHandlerImpl(ClientInterfaceImpl * client_interface)46 MlmeEventHandlerImpl::MlmeEventHandlerImpl(ClientInterfaceImpl* client_interface)
47 : client_interface_(client_interface) {
48 }
49
~MlmeEventHandlerImpl()50 MlmeEventHandlerImpl::~MlmeEventHandlerImpl() {
51 }
52
OnConnect(unique_ptr<MlmeConnectEvent> event)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
OnRoam(unique_ptr<MlmeRoamEvent> event)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
OnAssociate(unique_ptr<MlmeAssociateEvent> event)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
OnDisconnect(unique_ptr<MlmeDisconnectEvent> event)92 void MlmeEventHandlerImpl::OnDisconnect(unique_ptr<MlmeDisconnectEvent> event) {
93 client_interface_->is_associated_ = false;
94 client_interface_->bssid_.clear();
95 }
96
OnDisassociate(unique_ptr<MlmeDisassociateEvent> event)97 void MlmeEventHandlerImpl::OnDisassociate(unique_ptr<MlmeDisassociateEvent> event) {
98 client_interface_->is_associated_ = false;
99 client_interface_->bssid_.clear();
100 }
101
102
ClientInterfaceImpl(uint32_t wiphy_index,const std::string & interface_name,uint32_t interface_index,const std::vector<uint8_t> & interface_mac_addr,InterfaceTool * if_tool,SupplicantManager * supplicant_manager,NetlinkUtils * netlink_utils,ScanUtils * scan_utils)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
~ClientInterfaceImpl()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
GetBinder() const153 sp<android::net::wifi::IClientInterface> ClientInterfaceImpl::GetBinder() const {
154 return binder_;
155 }
156
Dump(std::stringstream * ss) const157 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
EnableSupplicant()180 bool ClientInterfaceImpl::EnableSupplicant() {
181 return supplicant_manager_->StartSupplicant();
182 }
183
DisableSupplicant()184 bool ClientInterfaceImpl::DisableSupplicant() {
185 return supplicant_manager_->StopSupplicant();
186 }
187
GetPacketCounters(vector<int32_t> * out_packet_counters)188 bool ClientInterfaceImpl::GetPacketCounters(vector<int32_t>* out_packet_counters) {
189 StationInfo station_info;
190 if (!netlink_utils_->GetStationInfo(interface_index_,
191 bssid_,
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
SignalPoll(vector<int32_t> * out_signal_poll_results)201 bool ClientInterfaceImpl::SignalPoll(vector<int32_t>* out_signal_poll_results) {
202 if (!IsAssociated()) {
203 LOG(INFO) << "Fail RSSI polling because wifi is not associated.";
204 return false;
205 }
206
207 StationInfo station_info;
208 if (!netlink_utils_->GetStationInfo(interface_index_,
209 bssid_,
210 &station_info)) {
211 return false;
212 }
213 out_signal_poll_results->push_back(
214 static_cast<int32_t>(station_info.current_rssi));
215 // Convert from 100kbit/s to Mbps.
216 out_signal_poll_results->push_back(
217 static_cast<int32_t>(station_info.station_tx_bitrate/10));
218 // Association frequency.
219 out_signal_poll_results->push_back(
220 static_cast<int32_t>(associate_freq_));
221
222 return true;
223 }
224
GetMacAddress()225 const vector<uint8_t>& ClientInterfaceImpl::GetMacAddress() {
226 return interface_mac_addr_;
227 }
228
requestANQP(const::std::vector<uint8_t> & bssid,const::android::sp<::android::net::wifi::IANQPDoneCallback> & callback)229 bool ClientInterfaceImpl::requestANQP(
230 const ::std::vector<uint8_t>& bssid,
231 const ::android::sp<::android::net::wifi::IANQPDoneCallback>& callback) {
232 // TODO(nywang): query ANQP information from wpa_supplicant.
233 return true;
234 }
235
RefreshAssociateFreq()236 bool ClientInterfaceImpl::RefreshAssociateFreq() {
237 // wpa_supplicant fetches associate frequency using the latest scan result.
238 // We should follow the same method here before we find a better solution.
239 std::vector<NativeScanResult> scan_results;
240 if (!scan_utils_->GetScanResult(interface_index_, &scan_results)) {
241 return false;
242 }
243 for (auto& scan_result : scan_results) {
244 if (scan_result.associated) {
245 associate_freq_ = scan_result.frequency;
246 }
247 }
248 return false;
249 }
250
IsAssociated() const251 bool ClientInterfaceImpl::IsAssociated() const {
252 return is_associated_;
253 }
254
255 } // namespace wificond
256 } // namespace android
257