Server Source

#include <stdio.h>
#include <winsock2.h>

void main()
{

    // Initialize Winsock.
    WSADATA wsaData;
    int iResult = WSAStartup( MAKEWORD(2,2), &wsaData );
    if ( iResult != NO_ERROR )
        printf("Error at WSAStartup()\n");

    // Create a socket.
    SOCKET m_socket;
    m_socket = socket( AF_INET, SOCK_STREAM, IPPROTO_TCP );

    if ( m_socket == INVALID_SOCKET )
    {
        printf( "Error at socket(): %ld\n", WSAGetLastError() );
        WSACleanup();
        return;
    }

    // Bind the socket.
    sockaddr_in service;

    service.sin_family = AF_INET;
    service.sin_addr.s_addr = inet_addr( "127.0.0.1" );
    service.sin_port = htons( 27015 );

    if ( bind( m_socket, (SOCKADDR*) &service, sizeof(service) ) == SOCKET_ERROR )
    {
        printf( "bind() failed.\n" );
        closesocket(m_socket);
        return;
    }

    // Listen on the socket.
    if ( listen( m_socket, 1 ) == SOCKET_ERROR )
        printf( "Error listening on socket.\n");

    // Accept connections.
    SOCKET AcceptSocket;

    printf( "Waiting for a client to connect...\n" );
    while (1)
    {
        AcceptSocket = SOCKET_ERROR;
        while ( AcceptSocket == SOCKET_ERROR )
        {
            AcceptSocket = accept( m_socket, NULL, NULL );
        }
        printf( "Client Connected.\n");
        m_socket = AcceptSocket;
        break;
    }

    // Send and receive data.
    int bytesSent;
    int bytesRecv = SOCKET_ERROR;
    char sendbuf[32] = "조산 서버";
    char recvbuf[32] = "";

    bytesRecv = recv( m_socket, recvbuf, 32, 0 );
    printf( "Bytes Recv: %ld\n", bytesRecv );

    bytesSent = send( m_socket, sendbuf, strlen(sendbuf), 0 );
    printf( "Bytes Sent: %ld\n", bytesSent );

    printf("Recv Buf: %s\n", recvbuf);

    return;
}