Client Source

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

#pragma comment(lib,"wsock32.lib")

void main()
{
    SOCKET s;
    SOCKADDR_IN sin;
    WSADATA wsaData;
    if(WSAStartup(MAKEWORD(2,0),&wsaData) != NO_ERROR)
    {
        printf("WSAStartup failed, error code : %d\n",WSAGetLastError());
        return ;
    }

    s = socket(AF_INET,SOCK_STREAM,IPPROTO_TCP);

    if(s == INVALID_SOCKET)
    {
        printf("make socket failed, error code : %d\n",WSAGetLastError());
        WSACleanup();
        return ;
    }

    sin.sin_family = AF_INET;
    sin.sin_addr.s_addr = inet_addr("127.0.0.1");
    sin.sin_port = htons(912);

    if(connect(s,(struct sockaddr*)&sin,sizeof(sin)) != NO_ERROR)
    {
        printf("connect failed, error code = %u \n",WSAGetLastError());
        closesocket(s);
        WSACleanup();
        return ;
    }

    if(closesocket(s) != NO_ERROR)
    {
        printf("remove socket failed, error code : %u\n",WSAGetLastError());
        WSACleanup();
        return ;
    }

    if(WSACleanup() != NO_ERROR)
    {
        printf("WSACleanup failed, error code = &u\n",WSAGetLastError());
        return ;
    }

    printf("127.0.0.1의 912번 포트에 접속을 성공하셨습니다.\n");
}