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311 lines
11 KiB
311 lines
11 KiB
/*
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* Copyright (C) 2016 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#include "wificond/client_interface_impl.h"
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#include <vector>
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#include <android-base/logging.h>
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#include <utils/Timers.h>
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#include "wificond/client_interface_binder.h"
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#include "wificond/logging_utils.h"
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#include "wificond/net/mlme_event.h"
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#include "wificond/net/netlink_utils.h"
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#include "wificond/scanning/scan_result.h"
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#include "wificond/scanning/scan_utils.h"
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#include "wificond/scanning/scanner_impl.h"
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using android::net::wifi::nl80211::IClientInterface;
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using android::net::wifi::nl80211::ISendMgmtFrameEvent;
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using android::net::wifi::nl80211::NativeScanResult;
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using android::sp;
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using android::wifi_system::InterfaceTool;
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using std::endl;
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using std::string;
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using std::unique_ptr;
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using std::vector;
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using namespace std::placeholders;
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namespace android {
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namespace wificond {
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MlmeEventHandlerImpl::MlmeEventHandlerImpl(ClientInterfaceImpl* client_interface)
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: client_interface_(client_interface) {
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}
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MlmeEventHandlerImpl::~MlmeEventHandlerImpl() {
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}
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void MlmeEventHandlerImpl::OnConnect(unique_ptr<MlmeConnectEvent> event) {
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if (!event->IsTimeout() && event->GetStatusCode() == 0) {
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client_interface_->is_associated_ = true;
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client_interface_->RefreshAssociateFreq();
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client_interface_->bssid_ = event->GetBSSID();
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} else {
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if (event->IsTimeout()) {
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LOG(INFO) << "Connect timeout";
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}
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client_interface_->is_associated_ = false;
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client_interface_->bssid_.fill(0);
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}
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}
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void MlmeEventHandlerImpl::OnRoam(unique_ptr<MlmeRoamEvent> event) {
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client_interface_->is_associated_ = true;
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client_interface_->RefreshAssociateFreq();
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client_interface_->bssid_ = event->GetBSSID();
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}
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void MlmeEventHandlerImpl::OnAssociate(unique_ptr<MlmeAssociateEvent> event) {
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if (!event->IsTimeout() && event->GetStatusCode() == 0) {
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client_interface_->is_associated_ = true;
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client_interface_->RefreshAssociateFreq();
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client_interface_->bssid_ = event->GetBSSID();
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} else {
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if (event->IsTimeout()) {
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LOG(INFO) << "Associate timeout";
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}
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client_interface_->is_associated_ = false;
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client_interface_->bssid_.fill(0);
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}
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}
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void MlmeEventHandlerImpl::OnDisconnect(unique_ptr<MlmeDisconnectEvent> event) {
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client_interface_->is_associated_ = false;
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client_interface_->bssid_.fill(0);
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}
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void MlmeEventHandlerImpl::OnDisassociate(unique_ptr<MlmeDisassociateEvent> event) {
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client_interface_->is_associated_ = false;
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client_interface_->bssid_.fill(0);
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}
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ClientInterfaceImpl::ClientInterfaceImpl(
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uint32_t wiphy_index,
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const std::string& interface_name,
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uint32_t interface_index,
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const std::array<uint8_t, ETH_ALEN>& interface_mac_addr,
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InterfaceTool* if_tool,
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NetlinkUtils* netlink_utils,
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ScanUtils* scan_utils)
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: wiphy_index_(wiphy_index),
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interface_name_(interface_name),
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interface_index_(interface_index),
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interface_mac_addr_(interface_mac_addr),
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if_tool_(if_tool),
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netlink_utils_(netlink_utils),
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scan_utils_(scan_utils),
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mlme_event_handler_(new MlmeEventHandlerImpl(this)),
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binder_(new ClientInterfaceBinder(this)),
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is_associated_(false),
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frame_tx_in_progress_(false),
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frame_tx_status_cookie_(0),
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on_frame_tx_status_event_handler_([](bool was_acked) {}) {
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netlink_utils_->SubscribeMlmeEvent(
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interface_index_,
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mlme_event_handler_.get());
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netlink_utils_->SubscribeFrameTxStatusEvent(
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interface_index,
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[this](uint64_t cookie, bool was_acked) {
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if (frame_tx_in_progress_ && frame_tx_status_cookie_ == cookie) {
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on_frame_tx_status_event_handler_(was_acked);
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frame_tx_in_progress_ = false;
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frame_tx_status_cookie_ = 0;
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on_frame_tx_status_event_handler_ = [](bool was_acked) {};
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}
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});
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netlink_utils_->SubscribeChannelSwitchEvent(interface_index_,
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std::bind(&ClientInterfaceImpl::OnChannelSwitchEvent, this, _1));
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if (!netlink_utils_->GetWiphyInfo(wiphy_index_,
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&band_info_,
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&scan_capabilities_,
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&wiphy_features_)) {
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LOG(ERROR) << "Failed to get wiphy info from kernel";
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}
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LOG(INFO) << "create scanner for interface with index: "
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<< (int)interface_index_;
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scanner_ = new ScannerImpl(interface_index_,
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scan_capabilities_,
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wiphy_features_,
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this,
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scan_utils_);
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// Need to set the interface up (especially in scan mode since wpa_supplicant
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// is not started)
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if_tool_->SetUpState(interface_name_.c_str(), true);
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}
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ClientInterfaceImpl::~ClientInterfaceImpl() {
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binder_->NotifyImplDead();
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scanner_->Invalidate();
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netlink_utils_->UnsubscribeFrameTxStatusEvent(interface_index_);
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netlink_utils_->UnsubscribeMlmeEvent(interface_index_);
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netlink_utils_->UnsubscribeChannelSwitchEvent(interface_index_);
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if_tool_->SetUpState(interface_name_.c_str(), false);
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}
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sp<android::net::wifi::nl80211::IClientInterface> ClientInterfaceImpl::GetBinder() const {
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return binder_;
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}
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void ClientInterfaceImpl::Dump(std::stringstream* ss) const {
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*ss << "------- Dump of client interface with index: "
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<< interface_index_ << " and name: " << interface_name_
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<< "-------" << endl;
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*ss << "Max number of ssids for single shot scan: "
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<< static_cast<int>(scan_capabilities_.max_num_scan_ssids) << endl;
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*ss << "Max number of ssids for scheduled scan: "
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<< static_cast<int>(scan_capabilities_.max_num_sched_scan_ssids) << endl;
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*ss << "Max number of match sets for scheduled scan: "
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<< static_cast<int>(scan_capabilities_.max_match_sets) << endl;
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*ss << "Maximum number of scan plans: "
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<< scan_capabilities_.max_num_scan_plans << endl;
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*ss << "Max scan plan interval in seconds: "
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<< scan_capabilities_.max_scan_plan_interval << endl;
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*ss << "Max scan plan iterations: "
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<< scan_capabilities_.max_scan_plan_iterations << endl;
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*ss << "Device supports random MAC for single shot scan: "
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<< wiphy_features_.supports_random_mac_oneshot_scan << endl;
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*ss << "Device supports low span single shot scan: "
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<< wiphy_features_.supports_low_span_oneshot_scan << endl;
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*ss << "Device supports low power single shot scan: "
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<< wiphy_features_.supports_low_power_oneshot_scan << endl;
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*ss << "Device supports high accuracy single shot scan: "
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<< wiphy_features_.supports_high_accuracy_oneshot_scan << endl;
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*ss << "Device supports random MAC for scheduled scan: "
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<< wiphy_features_.supports_random_mac_sched_scan << endl;
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*ss << "Device supports sending management frames at specified MCS rate: "
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<< wiphy_features_.supports_tx_mgmt_frame_mcs << endl;
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*ss << "------- Dump End -------" << endl;
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}
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bool ClientInterfaceImpl::GetPacketCounters(vector<int32_t>* out_packet_counters) {
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StationInfo station_info;
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if (!netlink_utils_->GetStationInfo(interface_index_,
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bssid_,
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&station_info)) {
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return false;
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}
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out_packet_counters->push_back(station_info.station_tx_packets);
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out_packet_counters->push_back(station_info.station_tx_failed);
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return true;
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}
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bool ClientInterfaceImpl::SignalPoll(vector<int32_t>* out_signal_poll_results) {
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if (!IsAssociated()) {
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LOG(INFO) << "Fail RSSI polling because wifi is not associated.";
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return false;
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}
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StationInfo station_info;
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if (!netlink_utils_->GetStationInfo(interface_index_,
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bssid_,
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&station_info)) {
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return false;
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}
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out_signal_poll_results->push_back(
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static_cast<int32_t>(station_info.current_rssi));
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// Convert from 100kbit/s to Mbps.
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out_signal_poll_results->push_back(
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static_cast<int32_t>(station_info.station_tx_bitrate/10));
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// Association frequency.
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out_signal_poll_results->push_back(
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static_cast<int32_t>(associate_freq_));
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// Convert from 100kbit/s to Mbps.
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out_signal_poll_results->push_back(
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static_cast<int32_t>(station_info.station_rx_bitrate/10));
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return true;
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}
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const std::array<uint8_t, ETH_ALEN>& ClientInterfaceImpl::GetMacAddress() {
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return interface_mac_addr_;
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}
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const BandInfo& ClientInterfaceImpl::GetBandInfo() const {
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return band_info_;
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}
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bool ClientInterfaceImpl::RefreshAssociateFreq() {
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// wpa_supplicant fetches associate frequency using the latest scan result.
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// We should follow the same method here before we find a better solution.
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std::vector<NativeScanResult> scan_results;
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if (!scan_utils_->GetScanResult(interface_index_, &scan_results)) {
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return false;
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}
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for (auto& scan_result : scan_results) {
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if (scan_result.associated) {
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associate_freq_ = scan_result.frequency;
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}
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}
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return false;
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}
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bool ClientInterfaceImpl::OnChannelSwitchEvent(uint32_t frequency) {
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if(!frequency) {
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LOG(ERROR) << "Frequency value is null";
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return false;
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}
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LOG(INFO) << "New channel on frequency: " << frequency;
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associate_freq_ = frequency;
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return true;
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}
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bool ClientInterfaceImpl::IsAssociated() const {
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return is_associated_;
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}
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void ClientInterfaceImpl::SendMgmtFrame(const vector<uint8_t>& frame,
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const sp<ISendMgmtFrameEvent>& callback, int32_t mcs) {
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if (mcs >= 0 && !wiphy_features_.supports_tx_mgmt_frame_mcs) {
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callback->OnFailure(
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ISendMgmtFrameEvent::SEND_MGMT_FRAME_ERROR_MCS_UNSUPPORTED);
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return;
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}
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uint64_t cookie;
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if (!netlink_utils_->SendMgmtFrame(interface_index_, frame, mcs, &cookie)) {
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callback->OnFailure(ISendMgmtFrameEvent::SEND_MGMT_FRAME_ERROR_UNKNOWN);
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return;
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}
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frame_tx_in_progress_ = true;
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frame_tx_status_cookie_ = cookie;
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nsecs_t start_time_ns = systemTime(SYSTEM_TIME_MONOTONIC);
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on_frame_tx_status_event_handler_ =
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[callback, start_time_ns](bool was_acked) {
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if (was_acked) {
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nsecs_t end_time_ns = systemTime(SYSTEM_TIME_MONOTONIC);
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int32_t elapsed_time_ms = static_cast<int32_t>(
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nanoseconds_to_milliseconds(end_time_ns - start_time_ns));
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callback->OnAck(elapsed_time_ms);
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} else {
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callback->OnFailure(
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ISendMgmtFrameEvent::SEND_MGMT_FRAME_ERROR_NO_ACK);
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}
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};
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}
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} // namespace wificond
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} // namespace android
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