Enable static IP via ethernet (#924)

libraries/WiFi/src/ETH.cpp

 /*
  ETH.h - espre ETH PHY support.
- Based on WiFi.h from Ardiono WiFi shield library.
+ Based on WiFi.h from Arduino WiFi shield library.
  Copyright (c) 2011-2014 Arduino.  All right reserved.
 
  This library is free software; you can redistribute it and/or
@@ -110,26 +110,43 @@ bool ETHClass::begin(uint8_t phy_addr, int power, int mdc, int mdio, eth_phy_typ
     return false;
 }
 
-/*
 bool ETHClass::config(IPAddress local_ip, IPAddress gateway, IPAddress subnet, IPAddress dns1, IPAddress dns2)
 {
-    if(!initialized){
+    esp_err_t err = ESP_OK;
+    tcpip_adapter_ip_info_t info;
+	
+    if(local_ip != (uint32_t)0x00000000){
+        info.ip.addr = static_cast<uint32_t>(local_ip);
+        info.gw.addr = static_cast<uint32_t>(gateway);
+        info.netmask.addr = static_cast<uint32_t>(subnet);
+    } else {
+        info.ip.addr = 0;
+        info.gw.addr = 0;
+        info.netmask.addr = 0;
+	}
+
+    err = tcpip_adapter_dhcpc_stop(TCPIP_ADAPTER_IF_ETH);
+    if(err != ESP_OK && err != ESP_ERR_TCPIP_ADAPTER_DHCP_ALREADY_STOPPED){
+        log_e("DHCP could not be stopped! Error: %d", err);
         return false;
     }
 
-    tcpip_adapter_ip_info_t info;
-    info.ip.addr = static_cast<uint32_t>(local_ip);
-    info.gw.addr = static_cast<uint32_t>(gateway);
-    info.netmask.addr = static_cast<uint32_t>(subnet);
-
-    if(!staticIP){
-        tcpip_adapter_dhcpc_stop(TCPIP_ADAPTER_IF_ETH);
-    }
-    if(tcpip_adapter_set_ip_info(TCPIP_ADAPTER_IF_ETH, &info) == ESP_OK) {
+    err = tcpip_adapter_set_ip_info(TCPIP_ADAPTER_IF_ETH, &info);
+    if(err != ERR_OK){
+        log_e("STA IP could not be configured! Error: %d", err);
+        return false;
+}
+    if(info.ip.addr){
         staticIP = true;
     } else {
-        return false;
+        err = tcpip_adapter_dhcpc_start(TCPIP_ADAPTER_IF_ETH);
+        if(err != ESP_OK && err != ESP_ERR_TCPIP_ADAPTER_DHCP_ALREADY_STARTED){
+            log_w("DHCP could not be started! Error: %d", err);
+            return false;
+        }
+        staticIP = false;
     }
+
     ip_addr_t d;
     d.type = IPADDR_TYPE_V4;
 
@@ -147,7 +164,6 @@ bool ETHClass::config(IPAddress local_ip, IPAddress gateway, IPAddress subnet, I
 
     return true;
 }
-*/
 
 IPAddress ETHClass::localIP()
 {

libraries/WiFi/src/ETH.h

@@ -62,8 +62,7 @@ class ETHClass {
 
         bool begin(uint8_t phy_addr=ETH_PHY_ADDR, int power=ETH_PHY_POWER, int mdc=ETH_PHY_MDC, int mdio=ETH_PHY_MDIO, eth_phy_type_t type=ETH_PHY_TYPE, eth_clock_mode_t clk_mode=ETH_CLK_MODE);
 
-        // NOT WORKING YET!
-        //bool config(IPAddress local_ip, IPAddress gateway, IPAddress subnet, IPAddress dns1 = (uint32_t)0x00000000, IPAddress dns2 = (uint32_t)0x00000000);
+        bool config(IPAddress local_ip, IPAddress gateway, IPAddress subnet, IPAddress dns1 = (uint32_t)0x00000000, IPAddress dns2 = (uint32_t)0x00000000);
 
         const char * getHostname();
         bool setHostname(const char * hostname);