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992 lines
32 KiB
992 lines
32 KiB
/**
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* AutoConnect class implementation.
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* @file AutoConnect.cpp
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* @author hieromon@gmail.com
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* @version 0.9.7
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* @date 2019-01-21
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* @copyright MIT license.
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*/
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#include "AutoConnect.h"
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#ifdef ARDUINO_ARCH_ESP32
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#include <esp_wifi.h>
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#endif
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/**
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* An actual reset function dependent on the architecture
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*/
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#if defined(ARDUINO_ARCH_ESP8266)
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#define SOFT_RESET() ESP.reset()
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#define SET_HOSTNAME(x) do { WiFi.hostname(x); } while(0)
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#elif defined(ARDUINO_ARCH_ESP32)
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#define SOFT_RESET() ESP.restart()
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#define SET_HOSTNAME(x) do { WiFi.setHostname(x); } while(0)
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#endif
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/**
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* AutoConnect default constructor. This entry activates WebServer
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* internally and the web server is allocated internal.
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*/
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AutoConnect::AutoConnect() {
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_initialize();
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_webServer.reset(nullptr);
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_dnsServer.reset(nullptr);
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_webServerAlloc = AC_WEBSERVER_HOSTED;
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}
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/**
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* Run the AutoConnect site using the externally ensured ESP 8266 WebServer.
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* User's added URI handler response can be included in handleClient method.
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* @param webServer A reference of ESP8266WebServer instance.
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*/
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AutoConnect::AutoConnect(WebServerClass& webServer) {
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_initialize();
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_webServer.reset(&webServer);
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_dnsServer.reset(nullptr);
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_webServerAlloc = AC_WEBSERVER_PARASITIC;
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}
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void AutoConnect::_initialize(void) {
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_rfConnect = false;
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_rfReset = false;
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_responsePage = nullptr;
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_currentPageElement = nullptr;
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_menuTitle = _apConfig.title;
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_connectTimeout = AUTOCONNECT_TIMEOUT;
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_scanCount = 0;
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memset(&_credential, 0x00, sizeof(struct station_config));
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#ifdef ARDUINO_ARCH_ESP32
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_disconnectEventId = -1; // The member available for ESP32 only
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#endif
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_aux.release();
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_auxUri = String("");
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}
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/**
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* A destructor. Free AutoConnect web pages and release Web server.
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* When the server is hosted it will be purged.
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*/
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AutoConnect::~AutoConnect() {
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end();
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}
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/**
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* Starts establishing WiFi connection without SSID and password.
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*/
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bool AutoConnect::begin(void) {
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return begin(nullptr, nullptr);
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}
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/**
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* Starts establishing WiFi connection.
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* Before establishing, start the Web server and DNS server for the captive
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* portal. Then begins connection establishment in WIFI_STA mode. If
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* connection can not established with the specified SSID and password,
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* switch to WIFI_AP_STA mode and activate SoftAP.
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* @param ssid SSID to be connected.
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* @param passphrase Password for connection.
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* @param timeout A time out value in milliseconds for waiting connection.
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* @return true Connection established, AutoConnect service started with WIFI_STA mode.
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* @return false Could not connected, Captive portal started with WIFI_AP_STA mode.
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*/
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bool AutoConnect::begin(const char* ssid, const char* passphrase, unsigned long timeout) {
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bool cs;
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// Overwrite for the current timeout value.
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_connectTimeout = timeout;
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// Start WiFi connection with station mode.
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WiFi.softAPdisconnect(true);
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WiFi.mode(WIFI_STA);
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delay(100);
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// Set host name
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if (_apConfig.hostName.length())
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SET_HOSTNAME(_apConfig.hostName.c_str());
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// Advance configuration for STA mode.
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#ifdef AC_DEBUG
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String staip_s = _apConfig.staip.toString();
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String staGateway_s = _apConfig.staGateway.toString();
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String staNetmask_s = _apConfig.staNetmask.toString();
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String dns1_s = _apConfig.dns1.toString();
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String dns2_s = _apConfig.dns2.toString();
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AC_DBG("WiFi.config(IP=%s, Gateway=%s, Subnetmask=%s, DNS1=%s, DNS2=%s)\n", staip_s.c_str(), staGateway_s.c_str(), staNetmask_s.c_str(), dns1_s.c_str(), dns2_s.c_str());
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#endif
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if (!WiFi.config(_apConfig.staip, _apConfig.staGateway, _apConfig.staNetmask, _apConfig.dns1, _apConfig.dns2)) {
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AC_DBG("failed\n");
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return false;
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}
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#ifdef ARDUINO_ARCH_ESP8266
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AC_DBG("DHCP client(%s)\n", wifi_station_dhcpc_status() == DHCP_STOPPED ? "STOPPED" : "STARTED");
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#endif
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// If the portal is requested promptly skip the first WiFi.begin and
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// immediately start the portal.
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if (_apConfig.immediateStart) {
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cs = false;
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_apConfig.autoReconnect = false;
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_apConfig.autoRise = true;
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AC_DBG("Start the portal immediately\n");
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}
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else {
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// Try to connect by STA immediately.
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if (ssid == nullptr && passphrase == nullptr)
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WiFi.begin();
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else {
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_disconnectWiFi(false);
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WiFi.begin(ssid, passphrase);
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}
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AC_DBG("WiFi.begin(%s%s%s)\n", ssid == nullptr ? "" : ssid, passphrase == nullptr ? "" : ",", passphrase == nullptr ? "" : passphrase);
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cs = _waitForConnect(_connectTimeout) == WL_CONNECTED;
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}
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// Reconnect with a valid credential as the autoReconnect option is enabled.
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if (!cs && _apConfig.autoReconnect && (ssid == nullptr && passphrase == nullptr)) {
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// Load a valid credential.
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if (_loadAvailCredential()) {
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// Try to reconnect with a stored credential.
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AC_DBG("autoReconnect loaded SSID:%s\n", reinterpret_cast<const char*>(_credential.ssid));
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const char* psk = strlen(reinterpret_cast<const char*>(_credential.password)) ? reinterpret_cast<const char*>(_credential.password) : nullptr;
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WiFi.begin(reinterpret_cast<const char*>(_credential.ssid), psk);
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AC_DBG("WiFi.begin(%s%s%s)\n", _credential.ssid, psk == nullptr ? "" : ",", psk == nullptr ? "" : psk);
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cs = _waitForConnect(_connectTimeout) == WL_CONNECTED;
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}
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}
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_currentHostIP = WiFi.localIP();
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// Rushing into the portal.
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if (!cs) {
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// The captive portal is effective at the autoRise is valid only.
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if (_apConfig.autoRise) {
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// Change WiFi working mode, Enable AP with STA
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WiFi.setAutoConnect(false);
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_disconnectWiFi(false);
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// Activate the AP mode with configured softAP and start the access point.
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WiFi.mode(WIFI_AP_STA);
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while (WiFi.getMode() != WIFI_AP_STA) {
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delay(1);
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yield();
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}
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// Connection unsuccessful, launch the captive portal.
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#if defined(ARDUINO_ARCH_ESP8266)
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if (!(_apConfig.apip == IPAddress(0, 0, 0, 0) || _apConfig.gateway == IPAddress(0, 0, 0, 0) || _apConfig.netmask == IPAddress(0, 0, 0, 0))) {
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_config();
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}
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#endif
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WiFi.softAP(_apConfig.apid.c_str(), _apConfig.psk.c_str(), _apConfig.channel, _apConfig.hidden);
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do {
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delay(100);
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yield();
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} while (WiFi.softAPIP() == IPAddress(0, 0, 0, 0));
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#if defined(ARDUINO_ARCH_ESP32)
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if (!(_apConfig.apip == IPAddress(0, 0, 0, 0) || _apConfig.gateway == IPAddress(0, 0, 0, 0) || _apConfig.netmask == IPAddress(0, 0, 0, 0))) {
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_config();
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}
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#endif
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if (_apConfig.apip != IPAddress(0, 0, 0, 0)) {
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do {
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delay(100);
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yield();
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} while (WiFi.softAPIP() != _apConfig.apip);
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}
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_currentHostIP = WiFi.softAPIP();
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AC_DBG("SoftAP %s/%s Ch(%d) IP:%s %s\n", _apConfig.apid.c_str(), _apConfig.psk.c_str(), _apConfig.channel, _currentHostIP.toString().c_str(), _apConfig.hidden ? "hidden" : "");
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// Fork to the exit routine that starts captive portal.
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cs = _onDetectExit ? _onDetectExit(_currentHostIP) : true;
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// Start Web server when TCP connection is enabled.
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_startWebServer();
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// Start captive portal without cancellation by DetectExit.
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if (cs) {
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// Prepare for redirecting captive portal detection.
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// Pass all URL requests to _captivePortal to disguise the captive portal.
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_startDNSServer();
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// Start the captive portal to make a new connection
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bool hasTimeout = false;
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_portalAccessPeriod = millis();
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while (WiFi.status() != WL_CONNECTED && !_rfReset) {
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handleClient();
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// Force execution of queued processes.
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yield();
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// Check timeout
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if ((hasTimeout = _hasTimeout(_apConfig.portalTimeout))) {
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AC_DBG("CP timeout exceeded:%ld\n", millis() - _portalAccessPeriod);
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break;
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}
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}
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cs = WiFi.status() == WL_CONNECTED;
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// If WLAN successfully connected, release DNS server.
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if (cs) {
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_dnsServer->stop();
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_dnsServer.reset();
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AC_DBG("DNS server stopped\n");
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}
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// Captive portal staying time exceeds timeout,
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// Close the portal if an option for keeping the portal is false.
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else if (hasTimeout) {
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if (_apConfig.retainPortal) {
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_purgePages();
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AC_DBG("Maintain portal\n");
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}
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else {
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_stopPortal();
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}
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}
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}
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}
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else {
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AC_DBG("Suppress autoRise\n");
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}
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}
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// It doesn't matter the connection status for launching the Web server.
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if (!_responsePage)
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_startWebServer();
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return cs;
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}
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/**
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* Configure AutoConnect portal access point.
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* @param ap SSID for access point.
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* @param psk Password for access point.
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*/
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bool AutoConnect::config(const char* ap, const char* password) {
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_apConfig.apid = String(ap);
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_apConfig.psk = String(password);
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return _config();
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}
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/**
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* Configure AutoConnect portal access point.
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* @param Config AutoConnectConfig class instance.
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*/
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bool AutoConnect::config(AutoConnectConfig& Config) {
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_apConfig = Config;
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return _config();
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}
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/**
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* Configure access point.
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* Set up access point with internal AucoConnectConfig parameter corrected
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* by Config method.
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*/
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bool AutoConnect::_config(void) {
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bool rc = WiFi.softAPConfig(_apConfig.apip, _apConfig.gateway, _apConfig.netmask);
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AC_DBG("SoftAP configure %s, %s, %s %s\n", _apConfig.apip.toString().c_str(), _apConfig.gateway.toString().c_str(), _apConfig.netmask.toString().c_str(), rc ? "" : "failed");
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return rc;
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}
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/**
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* Put a user site's home URI.
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* The URI specified by home is linked from "HOME" in the AutoConnect
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* portal menu.
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* @param uri A URI string of user site's home.
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*/
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void AutoConnect::home(const String& uri) {
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_apConfig.homeUri = uri;
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}
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/**
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* Stops AutoConnect captive portal service.
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*/
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void AutoConnect::end(void) {
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if (_responsePage != nullptr) {
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_responsePage->~PageBuilder();
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delete _responsePage;
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_responsePage = nullptr;
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}
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if (_currentPageElement != nullptr) {
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_currentPageElement->~PageElement();
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_currentPageElement = nullptr;
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}
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_stopPortal();
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if (_webServer) {
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switch (_webServerAlloc) {
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case AC_WEBSERVER_HOSTED:
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if (_dnsServer) {
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_dnsServer->stop();
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_dnsServer.reset();
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}
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_webServer.reset();
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break;
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case AC_WEBSERVER_PARASITIC:
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_webServer.release();
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break;
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}
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}
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}
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/**
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* Returns the current hosted ESP8266WebServer.
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*/
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WebServerClass& AutoConnect::host(void) {
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return *_webServer;
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}
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/**
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* Returns AutoConnectAux instance of specified.
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* @param uri An uri string.
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* @return A pointer of AutoConnectAux instance.
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*/
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AutoConnectAux* AutoConnect::aux(const String& uri) const {
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AutoConnectAux* aux_p = _aux.get();
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while (aux_p) {
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if (!strcmp(aux_p->uri(), uri.c_str()))
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break;
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aux_p = aux_p->_next.get();
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}
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return aux_p;
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}
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/**
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* Append auxiliary pages made up with AutoConnectAux.
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* @param aux A reference to AutoConnectAux that made up
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* the auxiliary page to be added.
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*/
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void AutoConnect::join(AutoConnectAux& aux) {
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if (_aux)
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_aux->_concat(aux);
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else
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_aux.reset(&aux);
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aux._join(*this);
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AC_DBG("%s on hands\n", aux.uri());
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}
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/**
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* Append auxiliary pages made up with AutoConnectAux.
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* @param aux A vector of reference to AutoConnectAux that made up
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* the auxiliary page to be added.
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*/
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void AutoConnect::join(AutoConnectAuxVT auxVector) {
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for (std::reference_wrapper<AutoConnectAux> aux : auxVector)
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join(aux.get());
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}
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/**
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* Starts Web server for AutoConnect service.
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*/
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void AutoConnect::_startWebServer(void) {
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// Boot Web server
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if (!_webServer) {
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// Only when hosting WebServer internally
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_webServer.reset(new WebServerClass(AUTOCONNECT_HTTPPORT));
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_webServerAlloc = AC_WEBSERVER_HOSTED;
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AC_DBG("WebServer allocated\n");
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}
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// Discard the original the not found handler to redirect captive portal detection.
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// It is supposed to evacuate but ESP8266WebServer::_notFoundHandler is not accessible.
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_webServer->onNotFound(std::bind(&AutoConnect::_handleNotFound, this));
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// here, Prepare PageBuilders for captive portal
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if (!_responsePage) {
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_responsePage = new PageBuilder();
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_responsePage->chunked(AUTOCONNECT_HTTP_TRANSFER);
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_responsePage->reserve(AUTOCONNECT_CONTENTBUFFER_SIZE);
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_responsePage->exitCanHandle(std::bind(&AutoConnect::_classifyHandle, this, std::placeholders::_1, std::placeholders::_2));
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_responsePage->insert(*_webServer);
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_webServer->begin();
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AC_DBG("http server started\n");
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}
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else {
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AC_DBG("http server readied\n");
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}
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}
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/**
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* Starts DNS server for Captive portal.
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*/
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void AutoConnect::_startDNSServer(void) {
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// Boot DNS server, set up for captive portal redirection.
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if (!_dnsServer) {
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_dnsServer.reset(new DNSServer());
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_dnsServer->setErrorReplyCode(DNSReplyCode::NoError);
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_dnsServer->start(AUTOCONNECT_DNSPORT, "*", WiFi.softAPIP());
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AC_DBG("DNS server started\n");
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}
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}
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/**
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* Handling for the AutoConnect web interface.
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* Invoke the handleClient of parent web server to process client request of
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* AutoConnect WEB interface.
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* No effects when the web server is not available.
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*/
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void AutoConnect::handleClient(void) {
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// Is there DNS Server process next request?
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if (_dnsServer)
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_dnsServer->processNextRequest();
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// handleClient valid only at _webServer activated.
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if (_webServer)
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_webServer->handleClient();
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handleRequest();
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}
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/**
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* Handling for the AutoConnect menu request.
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*/
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void AutoConnect::handleRequest(void) {
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// Handling processing requests to AutoConnect.
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if (_rfConnect) {
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// Leave from the AP currently.
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if (WiFi.status() == WL_CONNECTED)
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_disconnectWiFi(true);
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// An attempt to establish a new AP.
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int32_t ch = _connectCh == 0 ? _apConfig.channel : _connectCh;
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AC_DBG("Attempt:%s Ch(%d)\n", reinterpret_cast<const char*>(_credential.ssid), (int)ch);
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WiFi.begin(reinterpret_cast<const char*>(_credential.ssid), reinterpret_cast<const char*>(_credential.password), ch);
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if (_waitForConnect(_connectTimeout) == WL_CONNECTED) {
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if (WiFi.BSSID() != NULL) {
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memcpy(_credential.bssid, WiFi.BSSID(), sizeof(station_config::bssid));
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_currentHostIP = WiFi.localIP();
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_redirectURI = String(F(AUTOCONNECT_URI_SUCCESS));
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// Save current credential
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if (_apConfig.autoSave == AC_SAVECREDENTIAL_AUTO) {
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AutoConnectCredential credit(_apConfig.boundaryOffset);
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credit.save(&_credential);
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AC_DBG("%s credential saved\n", reinterpret_cast<const char*>(_credential.ssid));
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}
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// Ensures that keeps a connection with the current AP while the portal behaves.
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_setReconnect(AC_RECONNECT_SET);
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}
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else
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AC_DBG("%s has no BSSID, saving is unavailable\n", reinterpret_cast<const char*>(_credential.ssid));
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}
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else {
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_currentHostIP = WiFi.softAPIP();
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_redirectURI = String(F(AUTOCONNECT_URI_FAIL));
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_rsConnect = WiFi.status();
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_disconnectWiFi(false);
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while (WiFi.status() != WL_IDLE_STATUS && WiFi.status() != WL_DISCONNECTED) {
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delay(1);
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yield();
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}
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}
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_rfConnect = false;
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}
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if (_rfReset) {
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// Reset or disconnect by portal operation result
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_stopPortal();
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AC_DBG("Reset\n");
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delay(1000);
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SOFT_RESET();
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delay(1000);
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}
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if (_rfDisconnect) {
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// Disconnect from the current AP.
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// _waitForEndTransmission();
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_stopPortal();
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_disconnectWiFi(false);
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while (WiFi.status() == WL_CONNECTED) {
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delay(10);
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yield();
|
|
}
|
|
AC_DBG("Disconnected\n");
|
|
// Reset disconnection request
|
|
_rfDisconnect = false;
|
|
|
|
if (_apConfig.autoReset) {
|
|
delay(1000);
|
|
SOFT_RESET();
|
|
delay(1000);
|
|
}
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Register the exit routine for AutoConnectAux.
|
|
* @param uri Specify the URI of the AutoConnectAux page that
|
|
* registers the exit routine.
|
|
* @param handler A handler function of the exit routine.
|
|
* @param order Specify an enumeration type of
|
|
* AutoConnectExitOrder_t for the call timing of the exit routine.
|
|
* @return true An exit routine registered.
|
|
* @return false AutoConnectAux page for the specified URI is not
|
|
* registered.
|
|
*/
|
|
bool AutoConnect::on(const String& uri, const AuxHandlerFunctionT handler, AutoConnectExitOrder_t order) {
|
|
AutoConnectAux* aux = _aux.get();
|
|
while (aux) {
|
|
if (!strcmp(uri.c_str(), aux->uri())) {
|
|
aux->on(handler, order);
|
|
return true;
|
|
}
|
|
aux = aux->_next.get();
|
|
}
|
|
return false;
|
|
}
|
|
|
|
/**
|
|
* Register the exit routine for the starting captive portal.
|
|
* @param fn A function of the exit routine.
|
|
*/
|
|
void AutoConnect::onDetect(DetectExit_ft fn) {
|
|
_onDetectExit = fn;
|
|
}
|
|
|
|
/**
|
|
* Register the handler function for undefined url request detected.
|
|
* @param fn A function of the not found handler.
|
|
*/
|
|
void AutoConnect::onNotFound(WebServerClass::THandlerFunction fn) {
|
|
_notFoundHandler = fn;
|
|
}
|
|
|
|
/**
|
|
* Load stored credentials that match nearby WLANs.
|
|
* @return true A matched credential of BSSID was loaded.
|
|
*/
|
|
bool AutoConnect::_loadAvailCredential(void) {
|
|
AutoConnectCredential credential(_apConfig.boundaryOffset);
|
|
|
|
if (credential.entries() > 0) {
|
|
// Scan the vicinity only when the saved credentials are existing.
|
|
WiFi.scanDelete();
|
|
int8_t nn = WiFi.scanNetworks(false, true);
|
|
AC_DBG("%d network(s) found\n", (int)nn);
|
|
if (nn > 0) {
|
|
// Determine valid credentials by BSSID.
|
|
for (uint8_t i = 0; i < credential.entries(); i++) {
|
|
credential.load(i, &_credential);
|
|
for (uint8_t n = 0; n < nn; n++) {
|
|
if (!memcmp(_credential.bssid, WiFi.BSSID(n), sizeof(station_config::bssid)))
|
|
return true;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
return false;
|
|
}
|
|
|
|
/**
|
|
* Disconnect from the AP and stop the AutoConnect portal.
|
|
* Stops DNS server and flush tcp sending.
|
|
*/
|
|
void AutoConnect::_stopPortal(void) {
|
|
if (_dnsServer && _webServerAlloc == AC_WEBSERVER_HOSTED)
|
|
_dnsServer->stop();
|
|
|
|
if (_webServer) {
|
|
_webServer->client().stop();
|
|
delay(1000);
|
|
}
|
|
|
|
_setReconnect(AC_RECONNECT_RESET);
|
|
WiFi.softAPdisconnect(false);
|
|
AC_DBG("Portal stopped\n");
|
|
}
|
|
|
|
/**
|
|
* Redirect to captive portal if we got a request for another domain.
|
|
* Return true in that case so the page handler do not try to handle the request again.
|
|
*/
|
|
bool AutoConnect::_captivePortal(void) {
|
|
String hostHeader = _webServer->hostHeader();
|
|
if (!_isIP(hostHeader) && (hostHeader != WiFi.localIP().toString()) && (!hostHeader.endsWith(F(".local")))) {
|
|
AC_DBG("Detected appliaction, %s, %s\n", hostHeader.c_str(), WiFi.localIP().toString().c_str());
|
|
String location = String(F("http://")) + _webServer->client().localIP().toString() + String(AUTOCONNECT_URI);
|
|
_webServer->sendHeader(String(F("Location")), location, true);
|
|
_webServer->send(302, String(F("text/plain")), _emptyString);
|
|
_webServer->client().flush();
|
|
_webServer->client().stop();
|
|
return true;
|
|
}
|
|
return false;
|
|
}
|
|
|
|
/**
|
|
* Check whether the stay-time in the captive portal has a timeout.
|
|
* If the station is connected, the time measurement will be reset.
|
|
* @param timeout The time limit for keeping the captive portal.
|
|
* @return true There is no connection from the station even the time limit exceeds.
|
|
* @return false Connectionless duration has not exceeded yet.
|
|
*/
|
|
bool AutoConnect::_hasTimeout(unsigned long timeout) {
|
|
uint8_t staNum;
|
|
|
|
if (!_apConfig.portalTimeout)
|
|
return false;
|
|
|
|
#if defined(ARDUINO_ARCH_ESP8266)
|
|
staNum = 0;
|
|
struct station_info* station = wifi_softap_get_station_info();
|
|
while (station) {
|
|
staNum++;
|
|
station = STAILQ_NEXT(station, next);
|
|
}
|
|
wifi_softap_free_station_info();
|
|
#elif defined(ARDUINO_ARCH_ESP32)
|
|
staNum = WiFi.softAPgetStationNum();
|
|
#endif
|
|
if (staNum)
|
|
_portalAccessPeriod = millis();
|
|
|
|
return (millis() - _portalAccessPeriod > timeout) ? true : false;
|
|
}
|
|
|
|
/**
|
|
* A handler that redirects access to the captive portal to the connection
|
|
* configuration page.
|
|
*/
|
|
void AutoConnect::_handleNotFound(void) {
|
|
if (!_captivePortal()) {
|
|
if (_notFoundHandler) {
|
|
_notFoundHandler();
|
|
}
|
|
else {
|
|
PageElement page404(_PAGE_404, { { String(F("HEAD")), std::bind(&AutoConnect::_token_HEAD, this, std::placeholders::_1) } });
|
|
String html = page404.build();
|
|
_webServer->sendHeader(String(F("Cache-Control")), String(F("no-cache, no-store, must-revalidate")), true);
|
|
_webServer->sendHeader(String(F("Pragma")), String(F("no-cache")));
|
|
_webServer->sendHeader(String(F("Expires")), String("-1"));
|
|
_webServer->sendHeader(String(F("Content-Length")), String(html.length()));
|
|
_webServer->send(404, String(F("text/html")), html);
|
|
}
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Reset the ESP8266 module.
|
|
* It is called from the PageBuilder of the disconnect page and indicates
|
|
* the request for disconnection. It will be into progress after handleClient.
|
|
*/
|
|
String AutoConnect::_induceReset(PageArgument& args) {
|
|
AC_UNUSED(args);
|
|
_rfReset = true;
|
|
return String(F("Reset in progress..."));
|
|
}
|
|
|
|
/**
|
|
* Disconnect from AP.
|
|
* It is called from the PageBuilder of the disconnect page and indicates
|
|
* the request for disconnection. It will be into progress after handleClient.
|
|
*/
|
|
String AutoConnect::_induceDisconnect(PageArgument& args) {
|
|
AC_UNUSED(args);
|
|
_rfDisconnect = true;
|
|
return _emptyString;
|
|
}
|
|
|
|
/**
|
|
* Indicates a connection establishment request and returns a redirect
|
|
* response to the waiting for connection page. This is called from
|
|
* handling of the current request by PageBuilder triggered by handleClient().
|
|
* If "Credential" exists in POST parameter, it reads from EEPROM.
|
|
* @param args http request arguments.
|
|
* @return A redirect response including "Location:" header.
|
|
*/
|
|
String AutoConnect::_induceConnect(PageArgument& args) {
|
|
// Retrieve credential from the post method content.
|
|
if (args.hasArg(String(F(AUTOCONNECT_PARAMID_CRED)))) {
|
|
// Read from EEPROM
|
|
AutoConnectCredential credential(_apConfig.boundaryOffset);
|
|
struct station_config entry;
|
|
credential.load(args.arg(String(F(AUTOCONNECT_PARAMID_CRED))).c_str(), &entry);
|
|
strncpy(reinterpret_cast<char*>(_credential.ssid), reinterpret_cast<const char*>(entry.ssid), sizeof(_credential.ssid));
|
|
strncpy(reinterpret_cast<char*>(_credential.password), reinterpret_cast<const char*>(entry.password), sizeof(_credential.password));
|
|
AC_DBG("Credential loaded:%s\n", _credential.ssid);
|
|
}
|
|
else {
|
|
AC_DBG("Queried SSID:%s\n", args.arg(AUTOCONNECT_PARAMID_SSID).c_str());
|
|
// Credential had by the post parameter.
|
|
strncpy(reinterpret_cast<char*>(_credential.ssid), args.arg(String(F(AUTOCONNECT_PARAMID_SSID))).c_str(), sizeof(_credential.ssid));
|
|
strncpy(reinterpret_cast<char*>(_credential.password), args.arg(String(F(AUTOCONNECT_PARAMID_PASS))).c_str(), sizeof(_credential.password));
|
|
}
|
|
|
|
// Determine the connection channel based on the scan result.
|
|
_connectCh = 0;
|
|
for (uint8_t nn = 0; nn < _scanCount; nn++) {
|
|
String ssid = WiFi.SSID(nn);
|
|
if (!strcmp(ssid.c_str(), reinterpret_cast<const char*>(_credential.ssid))) {
|
|
_connectCh = WiFi.channel(nn);
|
|
break;
|
|
}
|
|
}
|
|
|
|
// Turn on the trigger to start WiFi.begin().
|
|
_rfConnect = true;
|
|
|
|
// Since v0.9.7, the redirect method changed from a 302 response to the
|
|
// meta tag with refresh attribute.
|
|
// This approach for ESP32 makes an inefficient choice. The waiting
|
|
// procedure for a connection attempt should be the server side. Also,
|
|
// the proper value of waiting time until refreshing is unknown. But
|
|
// AutoConnect cannot avoid the following error as affairs stand now
|
|
// that occurs at connection establishment.
|
|
// [WiFiClient.cpp:463] connected(): Disconnected: RES: 0, ERR: 128
|
|
// When connecting as a station, TCP reset caused by switching of the
|
|
// radio channel occurs. Although the Espressif's view is true. However,
|
|
// the actual TCP reset occurs not at the time of switching the channel.
|
|
// It occurs at the connection from the ESP32 to the AP is established
|
|
// and it is possible that TCP reset is occurring in other situations.
|
|
// So, it may not be the real cause. Client-origin redirects with HTML
|
|
// refresh depend on the behavior of the arduino-esp32 library. Thus,
|
|
// the implementations for redirects with HTML will continue until
|
|
// the arduino-esp32 core supports reconnection.
|
|
|
|
// Redirect to waiting URI while executing connection request.
|
|
// String url = String(F("http://")) + _webServer->client().localIP().toString() + String(AUTOCONNECT_URI_RESULT);
|
|
// _webServer->sendHeader(F("Location"), url, true);
|
|
// _webServer->send(302, F("text/plain"), "");
|
|
// _webServer->client().flush();
|
|
// _webServer->client().stop();
|
|
// _responsePage->cancel();
|
|
return _emptyString;
|
|
}
|
|
|
|
/**
|
|
* Responds response as redirect to the connection result page.
|
|
* A destination as _redirectURI is indicated by loop to establish connection.
|
|
*/
|
|
String AutoConnect::_invokeResult(PageArgument& args) {
|
|
AC_UNUSED(args);
|
|
String redirect = String(F("http://"));
|
|
// The host address to which the connection result for ESP32 responds
|
|
// changed from v0.9.7. This change is a measure according to the
|
|
// implementation of the arduino-esp32 1.0.1.
|
|
#if defined(ARDUINO_ARCH_ESP32)
|
|
// In ESP32, the station IP address just established could not be reached.
|
|
redirect += _webServer->client().localIP().toString();
|
|
#elif defined(ARDUINO_ARCH_ESP8266)
|
|
// In ESP8266, the host address that responds for the connection
|
|
// successful is the IP address of ESP8266 as a station.
|
|
// This is the specification as before.
|
|
redirect += _currentHostIP.toString();
|
|
#endif
|
|
redirect += _redirectURI;
|
|
_webServer->sendHeader(String(F("Location")), redirect, true);
|
|
_webServer->send(302, String(F("text/plain")), _emptyString);
|
|
_webServer->client().flush();
|
|
_webServer->client().stop();
|
|
_waitForEndTransmission(); // Wait for response transmission complete
|
|
_responsePage->cancel();
|
|
return _emptyString;
|
|
}
|
|
|
|
/**
|
|
* Classify the requested URI to responsive page builder.
|
|
* There is always only one PageBuilder instance that can exist in
|
|
* AutoConnect for saving RAM. Invokes a subordinate function that
|
|
* dynamically generates a response page at handleRequest. This is
|
|
* a part of the handling of http request originated from handleClient.
|
|
*/
|
|
bool AutoConnect::_classifyHandle(HTTPMethod method, String uri) {
|
|
AC_UNUSED(method);
|
|
_portalAccessPeriod = millis();
|
|
AC_DBG("Host:%s, URI:%s", _webServer->hostHeader().c_str(), uri.c_str());
|
|
|
|
// When handleClient calls RequestHandler, the parsed http argument
|
|
// remains the previous request.
|
|
// If the current request argument contains AutoConnectElement, it is
|
|
// the form data of the AutoConnectAux page and with this timing save
|
|
// the value of each element.
|
|
if (_webServer->hasArg(String(F(AUTOCONNECT_AUXURI_PARAM)))) {
|
|
_auxUri = _webServer->arg(AUTOCONNECT_AUXURI_PARAM);
|
|
_auxUri.replace("/", "/");
|
|
AutoConnectAux* aux = _aux.get();
|
|
while (aux) {
|
|
if (aux->_uriStr == _auxUri) {
|
|
aux->_storeElements(_webServer.get());
|
|
break;
|
|
}
|
|
aux = aux->_next.get();
|
|
}
|
|
}
|
|
|
|
// Here, classify requested uri
|
|
if (uri == _uri) {
|
|
AC_DBG_DUMB(", already allocated\n");
|
|
return true; // The response page already exists.
|
|
}
|
|
|
|
// Dispose decrepit page
|
|
_purgePages();
|
|
|
|
// Create the page dynamically
|
|
if ((_currentPageElement = _setupPage(uri)) == nullptr)
|
|
if (_aux) {
|
|
// Requested URL is not a normal page, exploring AUX pages
|
|
_currentPageElement = _aux->_setupPage(uri);
|
|
}
|
|
if (_currentPageElement != nullptr) {
|
|
AC_DBG_DUMB(", generated:%s", uri.c_str());
|
|
_uri = uri;
|
|
_responsePage->addElement(*_currentPageElement);
|
|
_responsePage->setUri(_uri.c_str());
|
|
}
|
|
AC_DBG_DUMB(", %s\n", _currentPageElement != nullptr ? "allocated" : "ignored");
|
|
return _currentPageElement != nullptr ? true : false;
|
|
}
|
|
|
|
/**
|
|
* Purge allocated pages.
|
|
*/
|
|
void AutoConnect::_purgePages(void) {
|
|
_responsePage->clearElement();
|
|
if (_currentPageElement != nullptr) {
|
|
delete _currentPageElement;
|
|
_currentPageElement = nullptr;
|
|
}
|
|
_uri = String("");
|
|
}
|
|
|
|
/**
|
|
* It checks whether the specified character string is a valid IP address.
|
|
* @param ipStr IP string for validation.
|
|
* @return true Valid.
|
|
*/
|
|
bool AutoConnect::_isIP(String ipStr) {
|
|
for (uint8_t i = 0; i < ipStr.length(); i++) {
|
|
char c = ipStr.charAt(i);
|
|
if (c != '.' && (c < '0' || c > '9'))
|
|
return false;
|
|
}
|
|
return true;
|
|
}
|
|
|
|
/**
|
|
* Convert MAC address in uint8_t array to Sting XX:XX:XX:XX:XX:XX format.
|
|
* @param mac Array of MAC address 6 bytes.
|
|
* @return MAC address string in XX:XX:XX:XX:XX:XX format.
|
|
*/
|
|
String AutoConnect::_toMACAddressString(const uint8_t mac[]) {
|
|
String macAddr = String("");
|
|
for (uint8_t i = 0; i < 6; i++) {
|
|
char buf[3];
|
|
sprintf(buf, "%02X", mac[i]);
|
|
macAddr += buf;
|
|
if (i < 5)
|
|
macAddr += ':';
|
|
}
|
|
return macAddr;
|
|
}
|
|
|
|
/**
|
|
* Convert dBm to the wifi signal quality.
|
|
* @param rssi dBm.
|
|
* @return A signal quality percentage.
|
|
*/
|
|
unsigned int AutoConnect::_toWiFiQuality(int32_t rssi) {
|
|
unsigned int qu;
|
|
if (rssi == 31) // WiFi signal is weak and RSSI value is unreliable.
|
|
qu = 0;
|
|
else if (rssi <= -100)
|
|
qu = 0;
|
|
else if (rssi >= -50)
|
|
qu = 100;
|
|
else
|
|
qu = 2 * (rssi + 100);
|
|
return qu;
|
|
}
|
|
|
|
/**
|
|
* Wait for establishment of the connection until the specified time expires.
|
|
* @param timeout Expiration time by millisecond unit.
|
|
* @return wl_status_t
|
|
*/
|
|
wl_status_t AutoConnect::_waitForConnect(unsigned long timeout) {
|
|
wl_status_t wifiStatus;
|
|
|
|
AC_DBG("Connecting");
|
|
unsigned long st = millis();
|
|
while ((wifiStatus = WiFi.status()) != WL_CONNECTED) {
|
|
if (timeout) {
|
|
if (millis() - st > timeout)
|
|
break;
|
|
}
|
|
AC_DBG_DUMB("%c", '.');
|
|
delay(300);
|
|
}
|
|
AC_DBG_DUMB("%s IP:%s\n", wifiStatus == WL_CONNECTED ? "established" : "time out", WiFi.localIP().toString().c_str());
|
|
return wifiStatus;
|
|
}
|
|
|
|
/**
|
|
* Control the automatic reconnection behaves. Reconnection behavior
|
|
* to the AP connected during captive portal operation is activated
|
|
* by an order as the argument.
|
|
* @param order AC_RECONNECT_SET or AC_RECONNECT_RESET
|
|
*/
|
|
void AutoConnect::_setReconnect(const AC_STARECONNECT_t order) {
|
|
#if defined(ARDUINO_ARCH_ESP32)
|
|
if (order == AC_RECONNECT_SET) {
|
|
_disconnectEventId = WiFi.onEvent([](WiFiEvent_t e, WiFiEventInfo_t info) {
|
|
AC_DBG("STA lost connection:%d\n", info.disconnected.reason);
|
|
bool rst = WiFi.reconnect();
|
|
AC_DBG("STA connection %s\n", rst ? "restored" : "failed");
|
|
}, WiFiEvent_t::SYSTEM_EVENT_AP_STADISCONNECTED);
|
|
AC_DBG("Event<%d> handler registered\n", static_cast<int>(WiFiEvent_t::SYSTEM_EVENT_AP_STADISCONNECTED));
|
|
}
|
|
else if (order == AC_RECONNECT_RESET) {
|
|
if (_disconnectEventId) {
|
|
WiFi.removeEvent(_disconnectEventId);
|
|
AC_DBG("Event<%d> handler released\n", static_cast<int>(WiFiEvent_t::SYSTEM_EVENT_AP_STADISCONNECTED));
|
|
}
|
|
}
|
|
#elif defined(ARDUINO_ARCH_ESP8266)
|
|
bool strc = order == AC_RECONNECT_SET ? true : false;
|
|
WiFi.setAutoReconnect(strc);
|
|
AC_DBG("STA reconnection:%s\n", strc ? "EN" : "DIS");
|
|
#endif
|
|
}
|
|
|
|
/**
|
|
* Wait for the end of transmission of the http response by closed
|
|
* from the http client.
|
|
*/
|
|
void AutoConnect::_waitForEndTransmission(void) {
|
|
#ifdef AC_DEBUG
|
|
AC_DBG("Leaves:");
|
|
unsigned long lt = millis();
|
|
#endif
|
|
while (_webServer->client().connected()) {
|
|
delay(1);
|
|
yield();
|
|
}
|
|
#ifdef AC_DEBUG
|
|
// Notifies of the time taken to end the session. If the http client
|
|
// times out, AC_DEBUG must be enabled and it is necessary to confirm
|
|
// that the http response is being transmitted correctly.
|
|
// To trace the correctness the close sequence of TCP connection,
|
|
// enable the debug log of the Arduino core side. If the normal,
|
|
// a message of closed the TCP connection will be logged between
|
|
// "Leaves:" and "the time taken to end the session" of the log.
|
|
AC_DBG_DUMB("%d[ms]\n", static_cast<int>(millis() - lt));
|
|
#endif
|
|
}
|
|
|
|
/**
|
|
* Disconnects the station from an associated access point.
|
|
* @param wifiOff The station mode turning switch.
|
|
*/
|
|
void AutoConnect::_disconnectWiFi(bool wifiOff) {
|
|
#if defined(ARDUINO_ARCH_ESP8266)
|
|
WiFi.disconnect(wifiOff);
|
|
#elif defined(ARDUINO_ARCH_ESP32)
|
|
WiFi.disconnect(wifiOff, true);
|
|
#endif
|
|
while (WiFi.status() == WL_CONNECTED) {
|
|
delay(1);
|
|
yield();
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Initialize an empty string to allow returning const String& with nothing.
|
|
*/
|
|
const String AutoConnect::_emptyString = String("");
|
|
|