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Ethernet : UDP.remoteIP()
Description
Gets the IP address of the remote connection.
This function must be called after UDP.parsePacket().
Syntax
UDP.remoteIP(); 
Parameters
None
Returns
4 bytes : the IP address of the remote connection
Example
  
#include <SPI.h>        
#include <Ethernet.h>
#include <EthernetUdp.h>
// Enter a MAC address and IP address for your controller below.
// The IP address will be dependent on your local network:
byte mac[] = {  
  0xDE, 0xAD, 0xBE, 0xEF, 0xFE, 0xED };
IPAddress ip(192, 168, 1, 177);
unsigned int localPort = 8888;      // local port to listen on
// An EthernetUDP instance to let us send and receive packets over UDP
EthernetUDP Udp;
void setup() {
  // start the Ethernet and UDP:
  Ethernet.begin(mac,ip);
  Udp.begin(localPort);
}
void loop() {
  int packetSize = Udp.parsePacket();
  if(packetSize)
  {
    Serial.print("Received packet of size ");
    Serial.println(packetSize);
    Serial.print("From IP : ");
    IPAddress remote = Udp.remoteIP();
    //print out the remote connection's IP address
    Serial.print(remote);
    Serial.print(" on port : ");
    //print out the remote connection's port
    Serial.println(Udp.remotePort());
  }
}
 
 
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