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/*
    Live Server on port 8888
*/
#define _WINSOCK_DEPRECATED_NO_WARNINGS
#include<io.h>
#include<stdio.h>
#include<winsock2.h>

#pragma comment(lib,"ws2_32.lib") //Winsock Library
#define IP "127.0.0.1"
#define PORT 8888   //The port on which to listen for incoming data

int main()
{

SOCKET s;
    struct sockaddr_in serverSocket, clientSocket;

char receiveBuffer[1000];
    int clientSocketLength;
    int recv_len;

clientSocketLength = sizeof(clientSocket);

WSADATA wsa;
    //Initialise winsock
    printf("\nInitialising Winsock...");
    if (WSAStartup(MAKEWORD(2, 2), &wsa) != 0)
    {
        printf("Failed. Error Code : %d", WSAGetLastError());
        exit(EXIT_FAILURE);
    }
    printf("Socket Initialised.\n");

//Create a socket
    if ((s = socket(AF_INET, SOCK_DGRAM, 0)) == INVALID_SOCKET)
    {
        printf("Could not create socket : %d", WSAGetLastError());
    }
    printf("Socket created.\n");

//Prepare the sockaddr_in structure
    serverSocket.sin_family = AF_INET;
    serverSocket.sin_port = htons(PORT);
    serverSocket.sin_addr.s_addr = inet_addr(IP);
    //serverSocket.sin_addr.s_addr = INADDR_ANY;
    //Bind
    if (bind(s, (struct sockaddr*)&serverSocket, sizeof(serverSocket)) == SOCKET_ERROR)
    {
        printf("\nBind failed with error code : %d", WSAGetLastError());
        exit(EXIT_FAILURE);
    }
    printf("Bind done\n\n");

//keep listening for data

while (1)
    {
        printf("\n\t\t\tWaiting for data...\n");
        fflush(stdout);
        //receiveBuffer[2000]=NULL;

if ((recv_len = recvfrom(s, receiveBuffer, 1000, 0, (struct sockaddr*)&clientSocket, &clientSocketLength)) == SOCKET_ERROR)
        {
            printf("\n\nrecvfrom() failed with error code : %d", WSAGetLastError());
            //exit(EXIT_FAILURE);
            while (1);
        }

//print details of the client/peer and the data received
        printf("\n\nReceived packet from %s:%d\n", inet_ntoa(clientSocket.sin_addr), ntohs(clientSocket.sin_port));
        printf("\nClient Says: ");
        printf(receiveBuffer, recv_len);

//now reply the client with the same data
        if (sendto(s, receiveBuffer, recv_len, 0, (struct sockaddr*)&clientSocket, clientSocketLength) == SOCKET_ERROR)
        {
            printf("\nsendto() failed with error code : %d", WSAGetLastError());
            // exit(EXIT_FAILURE);
            while (1);
        }
        else
            printf("\nMessage Sent Back to Client");

}

closesocket(s);
    WSACleanup();
    return 0;

}

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