UDP turn light on if IP address responds to a ping

/*
    Portions of this code written by Gregory Fenton
    http://labby.co.uk/2012/08/arduino-visual-icmp-ping-server-monitor-icmp-echo-request/
*/

#include <SPI.h>
#include <Ethernet.h>
#include <EthernetUdp.h> // UDP library from: bjoern@cs.stanford.edu 12/30/2008
#include <ICMPPing.h>

byte mac[] = {0xDE, 0xAD, 0xBE, 0xDD, 0xFE, 0xED}; // mac address for ethernet shield
byte ip[] = {192,168,0,177}; // ip address for ethernet shield
byte pingAddr[] = {192,168,0,10}; // ip address to ping

bool pingStatus = false;

SOCKET pingSocket = 0;

char buffer [256];

int delayMS = 5 * 1000; // delay between successive pings (60 * 1000 = 60 seconds)

#define serialOut 1
#define ledOut 1

#ifdef ledOut
    #define ledPing 2
    #define ledOk 3
    #define ledFail 4
#endif

//udp stuff
unsigned int localPort = 8888;          // local port to listen on

// buffers for receiving and sending data
// greg: unused in this code?
//char packetBuffer[UDP_TX_PACKET_MAX_SIZE]; //buffer to hold incoming packet,
//char ReplyBuffer[] = "acknowledged";           // a string to send back

// An EthernetUDP instance to let us send and receive packets over UDP
EthernetUDP Udp;
//end udp stuff

// greg: unused in this code?
// int val=0;

bool connected = false;

void setup()
{
    #ifdef serialOut
        // start serial port:
        Serial.begin(9600);
        Serial.println("Starting ethernet connection");
    #endif
    //start Ethernet
    // if (Ethernet.begin(mac) == 0) {
    #ifdef serialOut
        // Serial.println("Failed to configure Ethernet using DHCP");
    #endif
    // DHCP failed, so use a fixed IP address:
    Ethernet.begin(mac, ip);
    // start udp connection
    Udp.begin(localPort);
    // }
}

#ifdef serialOut
    void startPing()
    {
        Serial.println("Ping begin");
    }

    void endPing()
    {
        Serial.println("Ping fin");
    }
#endif

#ifdef ledOut
    void pingSuccess()
    {
        #ifdef serialOut
            Serial.println("Ping great success");
        #endif
        if(pingStatus == false) // we don't need to constantly turn the light on
        {
            #ifdef serialOut
                Serial.println("Living Room - Sofa light ON");
            #endif
            Udp.beginPacket("192.168.0.7", 9760);
            Udp.write("678,!R2D1F1|");
            Udp.endPacket();
            // greg: unused in this code?
            // val = random(300);
            pingStatus = true;
        }
    }

    void pingFail()
    {
        #ifdef serialOut
            Serial.println("Ping fail");
        #endif
        if(pingStatus == true) // we don't need to constantly turn the light off
        {
            #ifdef serialOut
                Serial.println("Living Room - Sofa light OFF");
            #endif
            Udp.beginPacket("192.168.0.7", 9760);
            Udp.write("678,!R2D1F0|");
            Udp.endPacket();
            // greg: unused in this code?
            // val = random(300);
            pingStatus = false;
        }
    }
#endif

void loop()
{
    bool pingRet; // pingRet stores the ping() success (true/false)

    #ifdef ledOut
        startPing();
    #endif
    ICMPPing ping(pingSocket);
    pingRet = ping(4, pingAddr, buffer);
    #ifdef ledOut
        delay(250);
        endPing();
    #endif

    #ifdef seriallOut
        Serial.println(buffer);
    #endif
    #ifdef ledOut
        if(pingRet) // Failure
            pingSuccess();
        else
            pingFail();
    #endif
    delay(delayMS);
}