// Demonstrates usage of the new udpServer feature.
//You can register the same function to multiple ports, and multiple functions to the same port.
//
// 2013-4-7 Brian Lee <cybexsoft@hotmail.com>

#include <EtherCard.h>
#include <IPAddress.h>

#define STATIC 1  // set to 1 to disable DHCP (adjust myip/gwip values below)

#if STATIC
// ethernet interface ip address
static byte myip[] = { 192,168,178,180 };
// gateway ip address
static byte gwip[] = { 192,168,178,1 };
static byte dnsip[] = { 84,116,46,21 };

unsigned int myPort = 8888;
unsigned int destPort = 9000;
static byte destIP[] = { 192,168,178,27 }; //255,255,255,255

#endif

// ethernet mac address - must be unique on your network
static byte mymac[] = { 0x70,0x69,0x69,0x2D,0x30,0x31 };

byte Ethernet::buffer[500]; // tcp/ip send and receive buffer
char data;
char msg[] = {"Hello World"};

//callback that prints received packets to the serial port
void udpSerialPrint(uint16_t port, byte ip[4], uint16_t server, char *data, uint16_t len){
  IPAddress src(ip[0], ip[1], ip[2], ip[3]);
  Serial.println("Received a message!");
  Serial.print("From: ");
  Serial.println(src);
  Serial.print("On port: ");
  Serial.println(port);
  Serial.print("UDP Server: ");
  Serial.println(server);
  Serial.print("Length of message: ");
  Serial.println(len);
  Serial.print("Message: ");
  Serial.println(data);  
  ether.sendUdp(msg, sizeof msg, myPort, destIP, destPort);

} 

void setup(){
  Serial.begin(57600);
  Serial.println("\n[backSoon]");

  if (ether.begin(sizeof Ethernet::buffer, mymac,53) == 0)
    Serial.println( "Failed to access Ethernet controller");
#if STATIC
  ether.staticSetup(myip, gwip, dnsip);
#else
  if (!ether.dhcpSetup())
    Serial.println("DHCP failed");
#endif

  ether.printIp("IP:  ", ether.myip);
  ether.printIp("GW:  ", ether.gwip);
  ether.printIp("DNS: ", ether.dnsip);

  //register udpSerialPrint() to port 1337
  ether.udpServerListenOnPort(&udpSerialPrint, myPort);

//  //register udpSerialPrint() to port 42.
//  ether.udpServerListenOnPort(&udpSerialPrint, 42);
}

void loop(){
  //this must be called for ethercard functions to work.
  ether.packetLoop(ether.packetReceive());

}