소켓 통신 서버에 값 전송 및 받아오기.

public class SocketInfo 
{
    public static String LOGIN_PRE_KEY  = "LOGININFO"; // 메인키
    public static String LOGIN_NAME_KEY = "USERNAME"; // 서브키
    public static String LOGIN_ID_KEY   = "USERID"; // 서브키
    public static String LOGIN_PW_KEY   = "USERPW"; // 서브키
    public static String LOGIN_AUTO_KEY = "AUTO_LOGIN";	// 서브키
	
// 서버 정보
public static String SERVER_IP = "IP";
public static int SERVER_PORT  = 포트번호;
	
// 변수 크기 정의
// 로그인
    public static int ID_SIZE             = 20;
    public static int PW_SIZE             = 20;
    public static int USER_NAME_SIZE      = 20;
    public static int REQUEST_RESULT_SIZE = 2;
	
// 서버 정보 요청
    public static int SERVER_NAME_SIZE = 30;
    public static int IP_SIZE          = 30;
    public static int DB_NAME_SIZE     = 30;
    public static int DB_DATE_SIZE     = 24;
    public static int HEADER_SIZE      = 20;
	
// 메세지 정의
// iMsgType
    public static int MSGTYPE_PINGPONG                = 1;
    public static int MSGTYPE_LOGIN                   = 2;
    public static int MSGTYPE_SERVER_CONNECT_STATUS   = 3;
    public static int MSGTYPE_SERVER_INFO             = 4;
    public static int MSGTYPE_SERVER_STATUS_INFO      = 5;
    public static int MSGTYPE_JOIN_STATUS_INFO        = 6;
    public static int MSGTYPE_LOGOUT                  = 7;
    public static int MSGTYPE_RECENT_JOIN_STATUS_INFO = 8;
    public static int MSGTYPE_SYSTEM_STATUS_INFO      = 9;
    public static int MSGTYPE_PICAON_JOIN_STATUS_INFO = 10;
	
// iMsgDetailType
    public static int MSGDETAILTYPE_REQUEST = 100; // 요청
    public static int MSGDETAILTYPE_RESULT  = 200; // 결과
	
// 소켓 결과값 전송 플래그(what)
    public static int REQUEST_RESULT = 1;
	
// 응답 결과
    public static String RESULT_DEF_SUCCESS = "00"; // 성공
    public static String RESULT_DEF_FAIL    = "01"; // 실패
	
// OS Type
    public static int OS_TYPE_WINDOWS = 1; // 윈도우
    public static int OS_TYPE_MOBLIE  = 2; // 모바일
	
// 프로그램 내 정의
    public static int NETWORK_CONNECT_FAIL = 0; // 로그인 실패	
    public static int RECIEVE_BUFFER_SIZE = 86;
}
 
public class StatisticController : PicaCast.Web.Controllers.BaseController
{
    [RequireHttps, HttpPost]
    public ActionResult Index(string id, string pwd)
    {
        List<Entity.StatisticItem> list;
 
        int rowCount;
 
        if (isCertification(id, pwd))
        {
            list = new BLL.StatisticComponent().GetList(1, 100, out rowCount);
        }
        else
        {
            list = new List<Entity.StatisticItem>();
        }
 
        return View(list);
    }
 
    bool isCertification(string id, string pwd)
    {
        Socket client;
        int port = SocketInfo.SERVER_PORT;
        IPAddress hostIp = IPAddress.Parse(SocketInfo.SERVER_IP);
        IPEndPoint endPoint = new IPEndPoint(hostIp, port);
 
        byte[] sendBuffer,
        receiveBuffer = new byte[SocketInfo.RECIEVE_BUFFER_SIZE];
            
        using (MemoryStream ms = new MemoryStream())
        using (BinaryWriter bw = new BinaryWriter(ms))
        {
                
//header
            bw.Write(SocketInfo.OS_TYPE_MOBLIE);
            bw.Write(SocketInfo.MSGTYPE_LOGIN);
            bw.Write(SocketInfo.MSGDETAILTYPE_REQUEST);
            bw.Write((SocketInfo.OS_TYPE_MOBLIE + SocketInfo.MSGTYPE_LOGIN + SocketInfo.MSGDETAILTYPE_REQUEST + SocketInfo.ID_SIZE + SocketInfo.PW_SIZE + 4) % 100);
            bw.Write(SocketInfo.ID_SIZE + SocketInfo.PW_SIZE + 4);
 
//body
            byte[] idBytes = new byte[SocketInfo.ID_SIZE];
            Encoding.GetEncoding("EUC-KR").GetBytes(id, 0, id.Length, idBytes, 0);
 
            byte[] pwdBytes = new byte[SocketInfo.PW_SIZE];
            Encoding.GetEncoding("EUC-KR").GetBytes(pwd, 0, pwd.Length, pwdBytes, 0);
 
            bw.Write(idBytes);
            bw.Write(pwdBytes);
            bw.Write(SocketInfo.ID_SIZE + SocketInfo.PW_SIZE + 4);
 
            sendBuffer = ms.ToArray();
        }
 
        try
        {
            client = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp);
                
            client.Connect(endPoint);
 
            int ret = client.Send(sendBuffer);
 
            int ret2 = client.Receive(receiveBuffer);
 
            string resultCode = Encoding.GetEncoding("EUC-KR").GetString(receiveBuffer.Where((o, i) => i < 2).ToArray());
            string resultName = Encoding.GetEncoding("EUC-KR").GetString(receiveBuffer.Where((o, i) => i >= 22 && i < 42).ToArray());
            string resultId   = Encoding.GetEncoding("EUC-KR").GetString(receiveBuffer.Where((o, i) => i >= 42 && i < 62).ToArray());
            string resultPwd  = Encoding.GetEncoding("EUC-KR").GetString(receiveBuffer.Where((o, i) => i >= 62).ToArray());
 
            resultCode = resultCode.Substring(0, resultCode.IndexOf('\0'));
            resultName = resultName.Substring(0, resultName.IndexOf('\0'));
            resultId   = resultId.Substring(0, resultId.IndexOf('\0'));
            resultPwd  = resultPwd.Substring(0, resultPwd.IndexOf('\0'));
 
            client.Close();
 
            if (resultPwd.Equals(pwd))
                return true;
            else
                return false;   
        }
        catch (Exception)
        {
            return false;
        }
    }
}

패킷 규약에 맞게 데이터 쌓아서 던지고 받아오면 됨 -_-ㅋ