winsock example, message not being received - dyn.com

[EDN Admin]

Hi,
this is microsofts sample:#include "stdafx.h"
#include <ws2tcpip.h>

// Need to link with Ws2_32.lib
#pragma comment (lib, "Ws2_32.lib")
// #pragma comment (lib, "Mswsock.lib")

#define DEFAULT_BUFLEN 512
#define DEFAULT_PORT "27015" //"27015"



int __cdecl mmServer(void)
{
WSADATA wsaData;
int iResult;

SOCKET ListenSocket = INVALID_SOCKET;
SOCKET ClientSocket = INVALID_SOCKET;


struct addrinfo *result = NULL;
struct addrinfo hints;

int iSendResult;
char recvbuf[DEFAULT_BUFLEN];
int recvbuflen = DEFAULT_BUFLEN;

// Initialize Winsock
iResult = WSAStartup(MAKEWORD(2,2), &wsaData);
if (iResult != 0) {
printf("WSAStartup failed with error: %dn", iResult);
return 1;
}

ZeroMemory(&hints, sizeof(hints));
hints.ai_family = AF_INET;
hints.ai_socktype = SOCK_STREAM;
hints.ai_protocol = IPPROTO_TCP;
hints.ai_flags = AI_PASSIVE;

// Resolve the server address and port
iResult = getaddrinfo(NULL, DEFAULT_PORT, &hints, &result);
if ( iResult != 0 ) {
printf("getaddrinfo failed with error: %dn", iResult);
WSACleanup();
return 1;
}

// Create a SOCKET for connecting to server
ListenSocket = socket(result->ai_family, result->ai_socktype, result->ai_protocol);
if (ListenSocket == INVALID_SOCKET) {
printf("socket failed with error: %ldn", WSAGetLastError());
freeaddrinfo(result);
WSACleanup();
return 1;
}

// Setup the TCP listening socket
iResult = bind( ListenSocket, result->ai_addr, (int)result->ai_addrlen);
if (iResult == SOCKET_ERROR) {
printf("bind failed with error: %dn", WSAGetLastError());
freeaddrinfo(result);
closesocket(ListenSocket);
WSACleanup();
return 1;
}

freeaddrinfo(result);

iResult = listen(ListenSocket, SOMAXCONN);
if (iResult == SOCKET_ERROR) {
printf("listen failed with error: %dn", WSAGetLastError());
closesocket(ListenSocket);
WSACleanup();
return 1;
}

// Accept a client socket
ClientSocket = accept(ListenSocket, NULL, NULL);
if (ClientSocket == INVALID_SOCKET) {
printf("accept failed with error: %dn", WSAGetLastError());
closesocket(ListenSocket);
WSACleanup();
return 1;
}

// No longer need server socket
closesocket(ListenSocket);

// Receive until the peer shuts down the connection
do {

iResult = recv(ClientSocket, recvbuf, recvbuflen, 0);
if (iResult > 0) {
printf("Bytes received: %dn", iResult);

// Echo the buffer back to the sender
iSendResult = send( ClientSocket, recvbuf, iResult, 0 );
if (iSendResult == SOCKET_ERROR) {
printf("send failed with error: %dn", WSAGetLastError());
closesocket(ClientSocket);
WSACleanup();
return 1;
}
printf("Bytes sent: %dn", iSendResult);
}
else if (iResult == 0)
printf("Connection closing...n");
else {
printf("recv failed with error: %dn", WSAGetLastError());
closesocket(ClientSocket);
WSACleanup();
return 1;
}

} while (iResult > 0);

// shutdown the connection since were done
iResult = shutdown(ClientSocket, SD_SEND);
if (iResult == SOCKET_ERROR) {
printf("shutdown failed with error: %dn", WSAGetLastError());
closesocket(ClientSocket);
WSACleanup();
return 1;
}

// cleanup
closesocket(ClientSocket);
WSACleanup();

return 0;
}
I have tried to send a message to this server but there is no sign of it getting through. The address that I have sent the message to is in the formatwww.address.com, which is a web address set up on dyn.com.
Any help gratefully appreciated

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