Added MDNS functions

Author: kounch

ESP8266.cpp

@@ -263,6 +263,16 @@ bool ESP8266::stopServer(void)
     return stopTCPServer();
 }
 
+bool ESP8266::enableMDNS(String hostname, String servername, uint32_t port)
+{
+    return sATCMDNS(true, hostname, servername, port);
+}
+  
+  bool ESP8266::disableMDNS(void)
+{
+    return sATCMDNS(false, "", "", 0);
+}
+
 bool ESP8266::send(const uint8_t *buffer, uint32_t len)
 {
     return sATCIPSENDSingle(buffer, len);
@@ -741,4 +751,25 @@ bool ESP8266::sATCIPSTO(uint32_t timeout)
     m_puart->println(timeout);
     return recvFind("OK");
 }
+bool ESP8266::sATCMDNS(bool enable, String hostname, String servername, uint32_t port)
+{
+  String data;
+  if (enable) {
+    rx_empty();
+    m_puart->print("AT+MDNS=1,\"");
+    m_puart->print(hostname);
+    m_puart->print("\",\"");
+    m_puart->print(servername);
+    m_puart->print("\",");
+    m_puart->println(port);
+  } else {
+    rx_empty();
+    m_puart->println("AT+MDNS=0");
+  }
+  data = recvString("OK", "ERROR");
+  if (data.indexOf("OK") != -1 || data.indexOf("no change") != -1) {
+    return true;
+  }
+  return false;
+}
 

ESP8266.h

@@ -338,6 +338,25 @@ class ESP8266 {
      */
     bool stopServer(void);
 
+    /**
+       Enable MDNS
+
+       @param hostname - MDNS host name.
+       @param servername - MDNS server name.
+       @param port - MDNS server port.
+       @retval true - success.
+       @retval false - failure.
+    */
+    bool enableMDNS(String hostname, String servername, uint32_t port);
+    
+    /**
+       Disable MDNS
+
+       @retval true - success.
+       @retval false - failure.
+    */
+    bool disableMDNS(void);
+
     /**
      * Send data based on TCP or UDP builded already in single mode. 
      * 
@@ -463,6 +482,7 @@ class ESP8266 {
     bool sATCIPMUX(uint8_t mode);
     bool sATCIPSERVER(uint8_t mode, uint32_t port = 333);
     bool sATCIPSTO(uint32_t timeout);
+    bool sATCMDNS(bool enable, String hostname, String servername, uint32_t port);
 
     /*
      * +IPD,len:data