allow setting the host name of AP interface

Author: Links2004

hardware/esp8266com/esp8266/libraries/ESP8266WiFi/src/ESP8266WiFi.cpp

@@ -582,6 +582,25 @@ int ESP8266WiFiClass::hostByName(const char* aHostname, IPAddress& aResult)
     return (aResult != 0) ? 1 : 0;
 }
 
+String ESP8266WiFiClass::hostname(void) {
+    return String(wifi_station_get_hostname());
+}
+
+bool ESP8266WiFiClass::hostname(char* aHostname) {
+    if(strlen(aHostname) > 32) {
+        return false;
+    }
+    return wifi_station_set_hostname(aHostname);
+}
+
+bool ESP8266WiFiClass::hostname(const char* aHostname) {
+    return hostname((char*) aHostname);
+}
+
+bool ESP8266WiFiClass::hostname(String aHostname) {
+    return hostname((char*) aHostname.c_str());
+}
+
 void ESP8266WiFiClass::beginSmartConfig()
 {
     if (_smartConfigStarted)

hardware/esp8266com/esp8266/libraries/ESP8266WiFi/src/ESP8266WiFi.h

@@ -300,6 +300,19 @@ class ESP8266WiFiClass
      */
     int hostByName(const char* aHostname, IPAddress& aResult);
 
+    /*
+     * Get ESP8266 station DHCP hostname
+     */
+    String hostname(void);
+
+    /*
+     * Set ESP8266 station DHCP hostname
+     * hostname, max length:32
+     */
+    bool hostname(char* aHostname);
+    bool hostname(const char* aHostname);
+    bool hostname(String aHostname);
+
     /*
      * Output WiFi settings to an object derived from Print interface (like Serial).
      *