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android13/system/connectivity/wificond/client_interface_impl.cpp

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