Modify the Winsock server program developed below so that it compiles and runs on the Command Line. The program should accept the server socket endpoint (IP address and port number) as command-line arguments. No client program is required for now.

Code attached below. please help with modifying the code below to function as stated in the description above.

#include

#include

#include

using namespace std;

#pragma comment (lib, "Ws2_32.lib")

#define PORT "3228"

#define BUFLEN 513

int main(int argc, char *argv[])

{

//Declare and initialize variables

WSADATA wsaData;

int iResult;

struct addrinfo *result = NULL, hints;

char ipaddr[65] = "127.0.0.1";

SOCKET servSock; //server socket handle

char recvbuf[BUFLEN];

int recvbuflen = BUFLEN;

int iSendResult;

//Create a temporary SOCKET object for accepting connections from clients

SOCKET ClientSocket;//client socket handle

//Initialize Winsock library

iResult = WSAStartup(MAKEWORD(2, 2), &wsaData);

if (iResult != 0)

{

printf("WSAStartup failed: %d ", iResult);

return -1;

}

//Fill out the hints address info structure which will be passed to the getaddrinfo function as an argument

memset(&hints, 0, sizeof(hints));

hints.ai_family = AF_INET;

hints.ai_socktype = SOCK_STREAM;

hints.ai_protocol = IPPROTO_TCP;

hints.ai_flags = AI_PASSIVE;

iResult = getaddrinfo(ipaddr, PORT, &hints, &result);

if (iResult != 0)

{

printf("getaddrinfo failed: %d ", iResult);

WSACleanup();

return -1;

}

//Create a SOCKET for listening for incoming connection requests

servSock = socket(result->ai_family, result->ai_socktype, result->ai_protocol);

if (servSock == INVALID_SOCKET)

{

printf("socket failed with error: %d ", WSAGetLastError());

WSACleanup();

return -1;

}

iResult = bind(servSock, result->ai_addr, (int)result->ai_addrlen);

if (iResult == SOCKET_ERROR)

{

printf("bind failed. %d ", WSAGetLastError());

freeaddrinfo(result);

closesocket(servSock);

WSACleanup();

return -1;

}

/*Once the bind function is called, the address information returned by the getaddrinfo function is no longer needed

Therefore, it is OK to free the memory allocated by the getaddrinfo function for this address information*/

freeaddrinfo(result);

//Listen for incoming connection requests on the created socket

//SOMAXCONN is the value for the backlog which is the maximum pending connections to accept

iResult = listen(servSock, SOMAXCONN);

if (iResult == SOCKET_ERROR)

{

printf("listen function failed. %d ", WSAGetLastError());

closesocket(servSock);

WSACleanup();

return -1;

}

printf("Listening on socket: %s:%s ", ipaddr, PORT);

//Accept a client socket

ClientSocket = accept(servSock, NULL, NULL);

if (ClientSocket == INVALID_SOCKET)

{

printf("accept failed: %d ", WSAGetLastError());

closesocket(servSock);

WSACleanup();

return -1;

}

iResult = recv(ClientSocket, recvbuf, recvbuflen - 1, 0);

if (iResult > 0)

{

printf("Bytes Received: %d ", iResult);

recvbuf[iResult] = '\0';

//Echo the buffer back to the sender

iSendResult = send(ClientSocket, recvbuf, iResult, 0);

if (iSendResult == SOCKET_ERROR)

{

printf("send failed: %d ", WSAGetLastError());

closesocket(ClientSocket);

WSACleanup();

return -1;

}

}

else if (iResult == 0)

printf("Connection closing... ");

else

{

printf("recv failed: %d ", WSAGetLastError());

closesocket(ClientSocket);

WSACleanup();

return -1;

}

closesocket(ClientSocket);

closesocket(servSock);

WSACleanup();

printf("Closing the connection gracefully... ");

system("pause");

return 0;

}