218 lines
6.5 KiB
C
218 lines
6.5 KiB
C
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#include <ESP8266WiFi.h>
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#include <WiFiClient.h>
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#include <ESP8266WebServer.h>
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#include <Adafruit_SSD1306.h>
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#include <LittleFS.h>
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#include <DNSServer.h>
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#include <map>
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// Constants for the HTML pages and config file
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static const String beginHtml = "<!DOCTYPE html><html lang=\"en\"><head><title>AP Configure</title><style></style></head><body><table><tbody><tr><td><label for=\"ssid\">SSID</label></td><td><input id=\"ssid\"/></td></tr><tr><td><label for=\"pass\" >Password</label></td><td><input id=\"pass\" type=\"password\"/></td></tr><tr><td><button onclick=\"location.href = '/add?ssid=' + escape(document.getElementById('ssid').value) + '&pass=' + escape(document.getElementById('pass').value);\">Add</button></td></tr></tbody></table><br/><table><tbody>";
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static const String endHtml = "</tbody></table></body></html>";
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static const String configFile = "/netman";
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// Timeout for WiFi connection attempts
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static const unsigned long connectionTimeout = 15000; // 15 seconds
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struct netman {
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public:
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netman(Adafruit_SSD1306& display);
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netman(String ssid, String pass, bool hidden, Adafruit_SSD1306& display);
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bool start();
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void reset();
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void addSsid(String ssid, String password);
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void removeSsid(String ssid, String password);
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private:
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Adafruit_SSD1306& display;
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std::unique_ptr<ESP8266WebServer> server;
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std::map<String, String> _ssids;
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String _ssid, _pass;
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bool _hidden;
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void init(String ssid, String pass, bool hidden);
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bool tryConnectToSsid(const char* ssid, const char* pass);
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bool tryConnect();
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void createAP();
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bool redirectToIp();
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void readConfig();
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void writeConfig();
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void handleRoot();
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void handleAdd();
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void handleRemove();
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};
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// Initialization
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void netman::init(String ssid, String pass, bool hidden) {
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// Ensure password meets minimum length
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if (pass != "" && pass.length() < 8) {
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display.println("Password too short. Using default: '8characters'");
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pass = "8characters";
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}
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// Set default SSID if none provided
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_ssid = ssid.isEmpty() ? "ESP" + String(ESP.getChipId()) : ssid;
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_pass = pass;
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_hidden = hidden;
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// Initialize LittleFS with error handling
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if (!LittleFS.begin()) {
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display.println("Failed to initialize filesystem.");
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}
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}
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// Constructors
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netman::netman(Adafruit_SSD1306& display) : display(display) {
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init("", "", false);
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}
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netman::netman(String ssid, String pass, bool hidden, Adafruit_SSD1306& display) : display(display) {
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init(ssid, pass, hidden);
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}
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// Attempt to start and connect or create AP
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bool netman::start() {
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if (_pass == "8characters") {
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display.println("Using default password due to length requirement.");
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}
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return tryConnect() || (createAP(), false);
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}
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// Attempt connection to each saved SSID in order
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bool netman::tryConnect() {
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readConfig();
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for (auto const& item : _ssids) {
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if (tryConnectToSsid(item.first.c_str(), item.second.c_str())) {
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return true;
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}
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}
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return false;
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}
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// Attempt to connect to a specific SSID with timeout
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bool netman::tryConnectToSsid(const char* ssid, const char* pass) {
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WiFi.begin(ssid, pass);
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unsigned long start = millis();
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display.println("Connecting to " + String(ssid) + "...");
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while (millis() - start < connectionTimeout) {
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delay(500);
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if (WiFi.status() == WL_CONNECTED) {
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display.println("Connected!");
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return true;
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}
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}
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display.println("Connection failed.");
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WiFi.disconnect();
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return false;
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}
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// Setup Access Point with DNS and HTTP server
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void netman::createAP() {
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WiFi.softAPdisconnect(true);
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WiFi.mode(WIFI_AP);
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WiFi.softAP(_ssid.c_str(), _pass.c_str(), 1, _hidden);
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display.println("AP created with IP: " + WiFi.softAPIP().toString());
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server.reset(new ESP8266WebServer(80));
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DNSServer dnsServer;
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dnsServer.start(53, "*", WiFi.softAPIP());
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server->on("/", std::bind(&netman::handleRoot, this));
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server->on("/add", std::bind(&netman::handleAdd, this));
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server->on("/remove", std::bind(&netman::handleRemove, this));
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server->begin();
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display.println("HTTP server started");
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while (true) {
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dnsServer.processNextRequest();
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server->handleClient();
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delay(10);
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}
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}
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// Redirect to AP IP if not accessed directly
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bool netman::redirectToIp() {
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if (server->hostHeader() == WiFi.softAPIP().toString()) {
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return false;
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}
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server->sendHeader("Location", "http://" + WiFi.softAPIP().toString(), true);
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server->send(302, "text/plain", "");
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server->client().stop();
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return true;
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}
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// Add SSID to config and save
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void netman::addSsid(String ssid, String password) {
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_ssids[ssid] = password;
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writeConfig();
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}
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// Remove SSID from config
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void netman::removeSsid(String ssid, String password) {
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if (_ssids.count(ssid) && _ssids[ssid] == password) {
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_ssids.erase(ssid);
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writeConfig();
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}
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}
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// Handle file-based config loading
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void netman::readConfig() {
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_ssids.clear();
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File file = LittleFS.open(configFile, "r");
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if (!file) {
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display.println("No config file found.");
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return;
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}
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while (file.available()) {
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String ssid = file.readStringUntil('\n');
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ssid.trim();
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String pass = file.readStringUntil('\n');
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pass.trim();
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_ssids[ssid] = pass;
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}
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file.close();
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}
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// Handle file-based config saving
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void netman::writeConfig() {
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File file = LittleFS.open(configFile, "w");
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for (const auto& item : _ssids) {
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file.println(item.first);
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file.println(item.second);
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}
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file.close();
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}
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// Reset configuration
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void netman::reset() {
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LittleFS.remove(configFile);
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_ssids.clear();
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}
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// Web handlers for adding/removing SSIDs
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void netman::handleRoot() {
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if (redirectToIp()) return;
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String result = beginHtml;
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for (const auto& item : _ssids) {
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result += "<tr><td><button onclick=\"location.href='/remove?ssid=' + escape('" + item.first + "') + '&pass=' + escape('" + item.second + "') \">×</button></td><td>" + item.first + "</td><td>-</td><td>" + item.second + "</td></tr>";
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}
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result += endHtml;
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server->send(200, "text/html", result);
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}
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void netman::handleAdd() {
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server->send(200, "text/html", "The ESP will now reboot.");
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addSsid(server->arg("ssid"), server->arg("pass"));
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delay(500);
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ESP.restart();
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}
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void netman::handleRemove() {
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removeSsid(server->arg("ssid"), server->arg("pass"));
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handleRoot();
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}
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