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黄村做网站哪家快,南昌网站公司,行业发展趋势,做网站用盗版PS接着上篇没有记录完的#xff0c;我们继续梳理#xff0c;需要上一篇做基础的请看#xff1a;鸿蒙 WiFi 扫描流程#xff08;1#xff09; 上一篇我们讲到 scan_service.cpp 里面的 SingleScan 方法#xff0c;继续这个方法往下看#xff1a; // foundation/communicat…接着上篇没有记录完的我们继续梳理需要上一篇做基础的请看鸿蒙 WiFi 扫描流程1 上一篇我们讲到 scan_service.cpp 里面的 SingleScan 方法继续这个方法往下看 // foundation/communication/wifi/wifi/services/wifi_standard/wifi_framework/wifi_manage/wifi_scan/scan_service.cppbool ScanService::SingleScan(ScanConfig scanConfig) {WIFI_LOGI(Enter ScanService::SingleScan.\n);#ifndef OHOS_ARCH_LITEif (!standByListerner.AllowScan()) {WIFI_LOGE(Scan not allowed when device in standby state.\n);return WIFI_OPT_FAILED;} #endifGetAllowBandFreqsControlInfo(scanConfig.scanBand, scanConfig.scanFreqs); — 哪个Bandif ((scanConfig.scanBand SCAN_BAND_UNSPECIFIED) (scanConfig.scanFreqs.empty())) {WIFI_LOGE(Have no allowed band or freq.\n);return false;}InterScanConfig interConfig;interConfig.fullScanFlag scanConfig.fullScanFlag;interConfig.hiddenNetworkSsid.assign(scanConfig.hiddenNetworkSsid.begin(), scanConfig.hiddenNetworkSsid.end());interConfig.scanStyle scanConfig.scanStyle;/* Specified frequency /if (scanConfig.scanBand SCAN_BAND_UNSPECIFIED) {interConfig.scanFreqs.assign(scanConfig.scanFreqs.begin(), scanConfig.scanFreqs.end());/** When band is SCAN_BAND_BOTH_WITH_DFS, need to scan all frequency, scanFreqs can be empty./} else if (scanConfig.scanBand ! SCAN_BAND_BOTH_WITH_DFS) {/ Converting frequency bands to frequencies. /if (!GetBandFreqs(scanConfig.scanBand, interConfig.scanFreqs)) {WIFI_LOGE(GetBandFreqs failed.\n);return false;}}/ Save the configuration. /int requestIndex StoreRequestScanConfig(scanConfig, interConfig);if (requestIndex MAX_SCAN_CONFIG_STORE_INDEX) {WIFI_LOGE(StoreRequestScanConfig failed.\n);return false;}std::unique_lockstd::mutex lock(scanConfigMapMutex);if (pScanStateMachine nullptr) {WIFI_LOGE(pScanStateMachine is null.\n);return false;}/ Construct a message. */ // 去状态机里面处理这个消息InternalMessage *interMessage pScanStateMachine-CreateMessage(static_castint(CMD_START_COMMON_SCAN), requestIndex);if (interMessage nullptr) {scanConfigMap.erase(requestIndex);WIFI_LOGE(CreateMessage failed.\n);return false;}if (!AddScanMessageBody(interMessage, interConfig)) {scanConfigMap.erase(requestIndex);MessageManage::GetInstance().ReclaimMsg(interMessage);WIFI_LOGE(AddScanMessageBody failed.\n);return false;}pScanStateMachine-SendMessage(interMessage);return true; }//foundation/communication/wifi/wifi/services/wifi_standard/wifi_framework/wifi_manage/wifi_scan/scan_state_machine.cpp bool ScanStateMachine::HardwareReady::ExecuteStateMsg(InternalMessage *msg) {WIFI_LOGI(ScanStateMachine::HardwareReady::ExecuteStateMsg.\n);if (msg nullptr) {WIFI_LOGE(msg is null.\n);return true;}switch (msg-GetMessageName()) {case CMD_START_COMMON_SCAN: —》 处理这个消息pScanStateMachine-CommonScanRequestProcess(msg);return true;case CMD_START_PNO_SCAN:pScanStateMachine-PnoScanRequestProcess(msg);return true;default:return false;} } // 发起 CommonScanRequestProcess 流程 void ScanStateMachine::CommonScanRequestProcess(InternalMessage interMessage) {WIFI_LOGI(ScanStateMachine::CommonScanRequestProcess.\n);int requestIndex 0;InterScanConfig scanConfig;if (!GetCommonScanRequestInfo(interMessage, requestIndex, scanConfig)) {ReportCommonScanFailed(requestIndex);return;}if (!VerifyScanStyle(scanConfig.scanStyle)) {WIFI_LOGE(invalid scan type);return;}{std::unique_lockstd::shared_mutex guard(lock);waitingScans.insert(std::pairint, InterScanConfig(requestIndex, scanConfig));}StartNewCommonScan(); }void ScanStateMachine::StartNewCommonScan() {WIFI_LOGI(Enter ScanStateMachine::StartNewCommonScan.\n);{std::shared_lockstd::shared_mutex guard(lock);if (waitingScans.size() 0) {ContinuePnoScanProcess();return;}ClearRunningScanSettings();bool hasFullScan false;/ Traverse the request list and combine parameters /std::mapint, InterScanConfig::iterator configIter waitingScans.begin();for (; configIter ! waitingScans.end(); configIter) {runningScanSettings.scanStyle MergeScanStyle(runningScanSettings.scanStyle, configIter-second.scanStyle);std::vectorstd::string::iterator hiddenIter configIter-second.hiddenNetworkSsid.begin();/ Remove duplicate hidden list */for (; hiddenIter ! configIter-second.hiddenNetworkSsid.end(); hiddenIter) {if (std::find(runningScanSettings.hiddenNetworkSsid.begin(),runningScanSettings.hiddenNetworkSsid.end(),*hiddenIter) ! runningScanSettings.hiddenNetworkSsid.end()) {continue;}runningScanSettings.hiddenNetworkSsid.push_back(hiddenIter);}if (!hasFullScan) {/ When scanFreqs is empty, it means that scan all frequenties /if (configIter-second.scanFreqs.empty()) {runningScanSettings.scanFreqs.clear();runningFullScanFlag true;hasFullScan true;} else {std::vectorint::iterator freqIter configIter-second.scanFreqs.begin();/ Repetitions are eliminated */for (; freqIter ! configIter-second.scanFreqs.end(); freqIter) {if (std::find(runningScanSettings.scanFreqs.begin(),runningScanSettings.scanFreqs.end(),*freqIter) ! runningScanSettings.scanFreqs.end()) {continue;}runningScanSettings.scanFreqs.push_back(*freqIter);}}}}}if (!StartSingleCommonScan(runningScanSettings)) { —》 继续看这个ReportCommonScanFailedAndClear(false);ContinuePnoScanProcess();return;}std::unique_lockstd::shared_mutex guard(lock);runningScans.swap(waitingScans);waitingScans.clear();SwitchState(commonScanningState);WIFI_LOGI(StartNewCommonScan success.\n); }bool ScanStateMachine::StartSingleCommonScan(WifiScanParam scanParam) {WIFI_LOGI(Enter ScanStateMachine::StartSingleCommonScan.\n);for (auto freqIter scanParam.scanFreqs.begin(); freqIter ! scanParam.scanFreqs.end(); freqIter) {WIFI_LOGI(freq is %{public}d.\n, *freqIter);}for (auto hiddenIter scanParam.hiddenNetworkSsid.begin(); hiddenIter ! scanParam.hiddenNetworkSsid.end();hiddenIter) {WIFI_LOGI(hidden ssid is %{public}s.\n, SsidAnonymize(hiddenIter).c_str());}WIFI_LOGI(Begin call Scan.\n);WifiErrorNo ret WifiStaHalInterface::GetInstance().Scan(scanParam); — 是不是很熟悉要通过idl_clientif ((ret ! WIFI_IDL_OPT_OK) (ret ! WIFI_IDL_OPT_SCAN_BUSY)) {WIFI_LOGE(WifiStaHalInterface::GetInstance().scan failed.);return false;}WIFI_LOGI(End call Scan.\n);/** Start the timer. If no result is returned for a long time, the scanning fails*/StartTimer(static_castint(WAIT_SCAN_RESULT_TIMER), MAX_WAIT_SCAN_RESULT_TIME);return true; }继续看下代码WifiStaHalInterface里面的 Scan 方法 foundation/communication/wifi/wifi/services/wifi_standard/wifi_framework/wifi_manage/idl_client/wifi_sta_hal_interface.cpp WifiErrorNo WifiStaHalInterface::Scan(const WifiScanParam scanParam) {CHECK_NULL_AND_RETURN(mIdlClient, WIFI_IDL_OPT_FAILED);return mIdlClient-Scan(scanParam); }// foundation/communication/wifi/wifi/services/wifi_standard/wifi_framework/wifi_manage/idl_client/wifi_idl_client.cpp WifiErrorNo WifiIdlClient::Scan(const WifiScanParam scanParam) {CHECK_CLIENT_NOT_NULL;ScanSettings settings;if (memset_s(settings, sizeof(settings), 0, sizeof(settings)) ! EOK) {return WIFI_IDL_OPT_FAILED;}bool bfail false;do {if (scanParam.hiddenNetworkSsid.size() 0) {settings.hiddenSsidSize scanParam.hiddenNetworkSsid.size();settings.hiddenSsid ConVectorToCArrayString(scanParam.hiddenNetworkSsid);if (settings.hiddenSsid nullptr) {bfail true;break;}}if (scanParam.scanFreqs.size() 0) {settings.freqSize scanParam.scanFreqs.size();settings.freqs (int *)calloc(settings.freqSize, sizeof(int));if (settings.freqs nullptr) {bfail true;break;}for (int i 0; i settings.freqSize; i) {settings.freqs[i] scanParam.scanFreqs[i];}}if (scanParam.scanStyle 0) {settings.scanStyle scanParam.scanStyle;}} while (0);WifiErrorNo err WIFI_IDL_OPT_FAILED;if (!bfail) {err StartScan(settings); — 向 Hal 发起扫描}if (settings.freqs ! nullptr) {free(settings.freqs);settings.freqs nullptr;}if (settings.hiddenSsid ! nullptr) {for (int i 0; i settings.hiddenSsidSize; i) {free(settings.hiddenSsid[i]);settings.hiddenSsid[i] nullptr;}free(settings.hiddenSsid);settings.hiddenSsid nullptr;}return err; } // 中间省略了 RPC的调用代码可以看wifi_hal_crpc_server类处理客户端请求然后根据请求找到对应的函数在调用HAL的方法 // 直接看调用的HAL方法foundation/communication/wifi/wifi/services/wifi_standard/wifi_hal/wifi_hal_sta_interface.c WifiErrorNo StartScan(const ScanSettings *settings) {LOGD(Ready to start scan with param.); #ifdef HDI_INTERFACE_SUPPORTint ret HdiStartScan(settings); #elseWifiWpaStaInterface *pStaIfc GetWifiStaInterface(0);if (pStaIfc NULL) {return WIFI_HAL_SUPPLICANT_NOT_INIT;}int ret pStaIfc-wpaCliCmdScan(pStaIfc, settings); — 往supplicant 发送命令if (ret 0) {LOGE(StartScan failed! ret%{public}d, ret);return WIFI_HAL_FAILED;} #endifif (ret WIFI_HAL_SCAN_BUSY) {LOGD(StartScan return scan busy);return WIFI_HAL_SCAN_BUSY;}LOGD(StartScan successfully!);return WIFI_HAL_SUCCESS; }// int (*wpaCliCmdScan)(WifiWpaStaInterface *p, const ScanSettings *settings); // wifi/services/wifi_standard/wifi_hal/wifi_hal_module/wpa_supplicant_hal/wpa_sta_hal/wifi_supplicant_hal.c static int WpaCliCmdScan(WifiWpaStaInterface *this, const ScanSettings settings) {if (this NULL) {LOGE(WpaCliCmdScan, this is NULL!);return -1;}/ Invalidate expired scan results */WpaCliCmdBssFlush(this);unsigned len CMD_BUFFER_SIZE;unsigned expectedLen 0;if (settings ! NULL) {expectedLen AssignCmdLen(this, settings);}if (expectedLen len) {len expectedLen 1;}char *pcmd (char *)calloc(len, sizeof(char));if (pcmd NULL) {LOGE(WpaCliCmdScan, pcmd is NULL!);return -1;}int pos 0;int res 0;if (settings ! NULL) {if (settings-scanStyle SCAN_TYPE_PNO settings-isStartPnoScan) {res snprintf_s(pcmd, len, len - 1, IFNAME%s set pno 1, this-ifname);} else if (settings-scanStyle SCAN_TYPE_PNO !settings-isStartPnoScan) {res snprintf_s(pcmd, len, len - 1, IFNAME%s set pno 0, this-ifname);} else {res snprintf_s(pcmd, len, len - 1, IFNAME%s SCAN, this-ifname);}}if (res 0) {LOGE(WpaCliCmdScan, snprintf_s error!);free(pcmd);return -1;}pos res;if (settings ! NULL ConcatScanSetting(settings, pcmd pos, len - pos) 0) {LOGE(snprintf scan settings error);free(pcmd);return -1;}char buf[REPLY_BUF_SMALL_LENGTH] {0};if (WpaCliCmd(pcmd, buf, sizeof(buf)) ! 0) { —》 命令下发free(pcmd);return -1;}free(pcmd);if (strncmp(buf, FAIL-BUSY, strlen(FAIL-BUSY)) 0) {LOGE(WpaCliCmdScan, WpaCliCmd return FAIL-BUSY!);return FAIL_BUSY;}return 0; }// foundation/communication/wifi/wifi/services/wifi_standard/wifi_hal/wifi_hal_module/wpa_supplicant_hal/wifi_wpa_common.c int WpaCliCmd(const char *cmd, char *buf, size_t bufLen) {if (cmd NULL || buf NULL || bufLen 0) {LOGE(WpaCliCmd, invalid parameters!);return -1;}WpaCtrl *ctrl GetWpaCtrl();if (ctrl NULL || ctrl-pSend NULL) {LOGE(WpaCliCmd, ctrl/ctrl-pSend is NULL!);return -1;}size_t len bufLen - 1;LOGI(wpa_ctrl_request - cmd: %{private}s, cmd);int ret wpa_ctrl_request(ctrl-pSend, cmd, strlen(cmd), buf, len, NULL);if (ret WPA_CMD_RETURN_TIMEOUT) {LOGE([%{private}s] command timed out., cmd);return WPA_CMD_RETURN_TIMEOUT;} else if (ret 0) {LOGE([%{private}s] command failed., cmd);return -1;}buf[len] \0;LOGI(wpa_ctrl_request - buf: %{private}s, buf);if (strncmp(buf, FAIL\n, strlen(FAIL\n)) 0 ||strncmp(buf, UNKNOWN COMMAND\n, strlen(UNKNOWN COMMAND\n)) 0) {LOGE(%{private}s request success, but response %{public}s, cmd, buf);return -1;}return 0; }到此我们就看到命令发送到wpa然后wpa 收到命令后去做扫描动作那扫描到结果如何通知上层呢下一篇我们继续记录。