[ETH] Fix setting static IP for Ethernet network interfaces

src/ESPEasy/net/DataStructs/NWPluginData_static_runtime.cpp

@@ -126,7 +126,7 @@ void NWPluginData_static_runtime::clear(networkIndex_t networkIndex)
 
   _connectionFailures = 0;
 
-  // FIXME TD-er: Should also clear dns cache?
+  // FIXME TD-er: Should also clear dns cache and/or static IP?
 }
 
 void NWPluginData_static_runtime::processEvent_and_clear()
@@ -304,6 +304,15 @@ void NWPluginData_static_runtime::processEvents()
   }
 }
 
+void NWPluginData_static_runtime::setStaticIP(const IPAddress & ip, const IPAddress & gateway, const IPAddress & subnetmask, const IPAddress & dns)
+{
+  _useStaticIP = IPAddressSet(ip) && IPAddressSet(gateway) && IPAddressSet(subnetmask);
+  _ip = ip;
+  _gateway = gateway;
+  _sn = subnetmask;
+  _dns = dns;
+}
+
 String NWPluginData_static_runtime::statusToString() const
 {
   String log;
@@ -314,6 +323,7 @@ String NWPluginData_static_runtime::statusToString() const
 
   if (hasIP()) {
     log += F("IP ");
+    if (_useStaticIP) log += F("(static) ");
   }
 
   if (operational()) {

src/ESPEasy/net/DataStructs/NWPluginData_static_runtime.h

@@ -127,6 +127,8 @@ struct NWPluginData_static_runtime {
 
   void     processEvents();
 
+  void setStaticIP(const IPAddress & ip, const IPAddress & gateway, const IPAddress & subnetmask, const IPAddress & dns);
+
   // =============================================
   // OnOffTimers for keeping track of:
   // - start/stop of interface
@@ -157,6 +159,9 @@ struct NWPluginData_static_runtime {
   bool _enableIPv6{}; // Cached enableIPv6 flag as it is being used from callbacks
 #endif
 
+  IPAddress _ip, _gateway, _sn, _dns;
+  bool _useStaticIP{}; // Added to make sure we don't have to re-check IP from a callback
+
 private:
 
 #ifdef ESP32

src/ESPEasy/net/ESPEasyNetwork_ESP32.cpp

@@ -147,7 +147,6 @@ bool NetworkConnected(bool force) {
 
   if (force || (timePassedSince(last_check_millis) > 50) || (last_check_millis == 0)) {
     last_check_millis = millis();
-    last_result = Network.isOnline();
 
     // FIXME TD-er: This is checking for NonAP interfaces, however we also have
     // ESPEasy::net::NWPluginCall(NWPlugin::Function::NWPLUGIN_WEBSERVER_SHOULD_RUN);
@@ -161,6 +160,7 @@ bool NetworkConnected(bool force) {
     // - Webserver
 
     processNetworkEvents();
+    last_result = Network.isOnline();
   }
   return last_result;
 }

src/ESPEasy/net/NWPluginStructs/NW003_data_struct_ETH_RMII.cpp

@@ -553,6 +553,12 @@ bool NW003_data_struct_ETH_RMII::ETHConnectRelaxed() {
 
   if (!(data && iface)) { return false; }
 
+  {
+    IPAddress ip, gateway, sn, dns;
+    getStaticIPAddresses(ip, gateway, sn, dns);
+    data->setStaticIP(ip, gateway, sn, dns);
+  }
+
   if (data->started() && data->connected()) {
     if (EthLinkUp()) { return true; }
     data->mark_connect_failed();
@@ -595,6 +601,12 @@ bool NW003_data_struct_ETH_RMII::ETHConnectRelaxed() {
 
     IPAddress ip, gateway, sn, dns;
     if (getStaticIPAddresses(ip, gateway, sn, dns)) {
+      addLog(LOG_LEVEL_INFO, strformat(
+        F("ETH: static IP: %s, GW: %s, SN: %s, DNS:%s"),
+        ip.toString().c_str(),
+        gateway.toString().c_str(),
+        sn.toString().c_str(),
+        dns.toString().c_str()));
       iface->config(ip, gateway, sn, dns);
     }
 

src/ESPEasy/net/NWPluginStructs/NW004_data_struct_ETH_SPI.cpp

@@ -441,6 +441,12 @@ bool NW004_data_struct_ETH_SPI::ETHConnectRelaxed() {
 
   if (!(data && iface)) { return false; }
 
+  {
+    IPAddress ip, gateway, sn, dns;
+    getStaticIPAddresses(ip, gateway, sn, dns);
+    data->setStaticIP(ip, gateway, sn, dns);
+  }
+
   if (data->started() && data->connected()) {
     if (EthLinkUp()) { return true; }
     data->mark_connect_failed();

src/ESPEasy/net/eth/ETH_NWPluginData_static_runtime.cpp

@@ -39,6 +39,13 @@ struct ETH_stats_and_cache_t {
 
       //      _eth.enableIPv6(_stats_and_cache._enableIPv6);
     }
+    if (_stats_and_cache._useStaticIP) {
+      _eth.config(
+        _stats_and_cache._ip,
+        _stats_and_cache._gateway,
+        _stats_and_cache._sn,
+        _stats_and_cache._dns);
+    }
   }
 
   void mark_stop(esp_eth_handle_t handle)

src/src/WebServer/Markup_Forms.cpp

@@ -411,7 +411,31 @@ void addFormIPBox(const String   & label,
                   const IPAddress& ip)
 {
   const bool empty_IP = !IPAddressSet(ip);
+
   addFormTextBox(label, id, (empty_IP) ? EMPTY_STRING : formatIP(ip));
+
+  /*
+     // TODO TD-er: Option to validate IP in HTML
+     //
+     // IP input HTML validation from:
+     // Source - https://stackoverflow.com/a/54796814
+     // Posted by ptay, modified by community. See post 'Timeline' for change history
+     // Retrieved 2026-04-30, License - CC BY-SA 4.0
+     //
+     // <input type="text" minlength="7" maxlength="15" size="15" pattern="^(?>(\d|[1-9]\d{2}|1\d\d|2[0-4]\d|25[0-5])\.){3}(?1)$">
+
+     const String value = (empty_IP) ? EMPTY_STRING : formatIP(ip);
+     addRowLabel_tr_id(label, id);
+
+     // Validation only for IPv4 address
+     addHtml(strformat(
+              F("<input class='wide' type='text' minlength='7' maxlength='15' size='15'
+                 pattern='^(?>(\\d|[1-9]\\d{2}|1\\d\\d|2[0-4]\\d|25[0-5])\\.){3}(?1)$' name='%s' id='%s' value='%s'>"),
+              id.c_str(),
+              id.c_str(),
+              value.c_str()
+              ));
+   */
 }