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134 lines
3.7 KiB
134 lines
3.7 KiB
/*
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* Copyright (C) 2020 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 "chre/pal/wifi.h"
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#include "chre/util/memory.h"
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#include "chre/util/unique_ptr.h"
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#include <chrono>
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#include <cinttypes>
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#include <thread>
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/**
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* A simulated implementation of the WiFi PAL for the linux platform.
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*/
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namespace {
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const struct chrePalSystemApi *gSystemApi = nullptr;
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const struct chrePalWifiCallbacks *gCallbacks = nullptr;
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//! Thread to deliver asynchronous WiFi scan results after a CHRE request.
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std::thread gScanEventsThread;
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//! Thread to use when delivering a scan monitor status update.
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std::thread gScanMonitorStatusThread;
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void sendScanResponse() {
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gCallbacks->scanResponseCallback(true, CHRE_ERROR_NONE);
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auto event = chre::MakeUniqueZeroFill<struct chreWifiScanEvent>();
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auto result = chre::MakeUniqueZeroFill<struct chreWifiScanResult>();
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event->resultCount = 1;
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event->resultTotal = 1;
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event->referenceTime = gSystemApi->getCurrentTime();
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event->results = result.release();
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gCallbacks->scanEventCallback(event.release());
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}
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void sendScanMonitorResponse(bool enable) {
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gCallbacks->scanMonitorStatusChangeCallback(enable, CHRE_ERROR_NONE);
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}
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void stopScanEventThreads() {
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if (gScanEventsThread.joinable()) {
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gScanEventsThread.join();
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}
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}
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void stopScanMonitorThreads() {
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if (gScanMonitorStatusThread.joinable()) {
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gScanMonitorStatusThread.join();
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}
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}
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uint32_t chrePalWifiGetCapabilities() {
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return CHRE_WIFI_CAPABILITIES_SCAN_MONITORING |
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CHRE_WIFI_CAPABILITIES_ON_DEMAND_SCAN;
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}
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bool chrePalWifiConfigureScanMonitor(bool enable) {
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stopScanMonitorThreads();
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gScanMonitorStatusThread = std::thread(sendScanMonitorResponse, enable);
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return true;
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}
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bool chrePalWifiApiRequestScan(const struct chreWifiScanParams * /* params */) {
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stopScanEventThreads();
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gScanEventsThread = std::thread(sendScanResponse);
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return true;
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}
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void chrePalWifiApiReleaseScanEvent(struct chreWifiScanEvent *event) {
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chre::memoryFree(const_cast<uint32_t *>(event->scannedFreqList));
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chre::memoryFree(const_cast<struct chreWifiScanResult *>(event->results));
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chre::memoryFree(event);
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}
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void chrePalWifiApiClose() {
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stopScanEventThreads();
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stopScanMonitorThreads();
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}
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bool chrePalWifiApiOpen(const struct chrePalSystemApi *systemApi,
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const struct chrePalWifiCallbacks *callbacks) {
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chrePalWifiApiClose();
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bool success = false;
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if (systemApi != nullptr && callbacks != nullptr) {
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gSystemApi = systemApi;
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gCallbacks = callbacks;
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success = true;
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}
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return success;
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}
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} // anonymous namespace
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const struct chrePalWifiApi *chrePalWifiGetApi(uint32_t requestedApiVersion) {
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static const struct chrePalWifiApi kApi = {
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.moduleVersion = CHRE_PAL_WIFI_API_CURRENT_VERSION,
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.open = chrePalWifiApiOpen,
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.close = chrePalWifiApiClose,
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.getCapabilities = chrePalWifiGetCapabilities,
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.configureScanMonitor = chrePalWifiConfigureScanMonitor,
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.requestScan = chrePalWifiApiRequestScan,
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.releaseScanEvent = chrePalWifiApiReleaseScanEvent,
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};
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if (!CHRE_PAL_VERSIONS_ARE_COMPATIBLE(kApi.moduleVersion,
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requestedApiVersion)) {
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return nullptr;
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} else {
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return &kApi;
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}
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}
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