Added dns forward to configuration web page.

src/Config_Web.cpp

@@ -1,14 +1,24 @@
 #include "EggDuino.h"
 #include <ArduinoJson.h>
+#include <DNSServer.h>
 #include <string.h>
 
 namespace
 {
 	const char *kConfigPath = "/config.json";
 	const size_t kConfigJsonCapacity = 4096;
+	const byte kDnsPort = 53;
 
 	WebServer server(80);
+	DNSServer dnsServer;
 	bool configStoreReady = false;
+	bool apModeActive = false;
+
+	void redirectToRoot()
+	{
+		server.sendHeader("Location", String("http://") + WiFi.softAPIP().toString() + "/", true);
+		server.send(302, "text/plain", "");
+	}
 
 	bool isIntType(const ConfigParameter &param)
 	{
@@ -253,6 +263,11 @@ async function pollLogs() {
 
 	void handleNotFound()
 	{
+		if (apModeActive)
+		{
+			redirectToRoot();
+			return;
+		}
 		if (server.uri().startsWith("/api/"))
 		{
 			server.send(404, "text/plain", "API endpoint not found");
@@ -483,6 +498,8 @@ void startWebInterface()
 {
 	initConfigStore();
 	bool staConnected = false;
+	apModeActive = false;
+	dnsServer.stop();
 
 	if (!g_sWifiSsid.isEmpty())
 	{
@@ -510,6 +527,8 @@ void startWebInterface()
 		WiFi.mode(WIFI_AP);
 		if (WiFi.softAP("EggDuino"))
 		{
+			apModeActive = true;
+			dnsServer.start(kDnsPort, "*", WiFi.softAPIP());
 			Serial.println(String("AP aktiv: EggDuino / http://") + WiFi.softAPIP().toString());
 		}
 		else
@@ -522,11 +541,21 @@ void startWebInterface()
 	server.on("/api/config", HTTP_GET, handleGetConfig);
 	server.on("/api/config", HTTP_POST, handlePostConfig);
 	server.on("/api/logs", HTTP_GET, handleGetLogs);
+	server.on("/generate_204", HTTP_GET, redirectToRoot);
+	server.on("/gen_204", HTTP_GET, redirectToRoot);
+	server.on("/hotspot-detect.html", HTTP_GET, redirectToRoot);
+	server.on("/connecttest.txt", HTTP_GET, redirectToRoot);
+	server.on("/ncsi.txt", HTTP_GET, redirectToRoot);
+	server.on("/fwlink", HTTP_GET, redirectToRoot);
 	server.onNotFound(handleNotFound);
 	server.begin();
 }
 
 void handleWebInterface()
 {
+	if (apModeActive)
+	{
+		dnsServer.processNextRequest();
+	}
 	server.handleClient();
 }