view/SocketX/BaseSocket.cpp

#include "stdafx.h"
#include "SocketX.h"

//////////////////////////////////////////////////////////////////////////

void SocketXFinalize()
{
        WSACleanup();
}

BOOL SocketXInitialize()
{
        WSADATA wsaData;
        WORD    wVersion = MAKEWORD(2, 2);

        if (WSAStartup(wVersion, &wsaData) != 0)
        {
                TRACE0("Failed to WSAStartup.\n");
                return FALSE;
        }

        if (wVersion != wsaData.wVersion)
        {
                TRACE0("Failed to WinhSocket version.\n");
                return FALSE;
        }

        atexit(SocketXFinalize);

        return TRUE;
}

//////////////////////////////////////////////////////////////////////////

IMPLEMENT_DYNAMIC(IBaseSocket, CWnd)

BEGIN_MESSAGE_MAP(IBaseSocket, CWnd)
        ON_MESSAGE(SM_EVENT, &IBaseSocket::OnSocketMessage)
        ON_MESSAGE(SM_GETHOST, &IBaseSocket::OnGetHostMessage)
END_MESSAGE_MAP()

IBaseSocket::IBaseSocket() :
        m_hSocket(INVALID_SOCKET),
        m_dwError(0),
        m_dwSendTimeout(SX_SEND_TIMEOUT),
        m_dwReceiveTimeout(SX_RECV_TIMEOUT),
        m_lEvent(0),
        m_wBindPort(0),
        m_fBlocking(TRUE),
        m_fWnd(FALSE),
        m_fInit(FALSE)
{
        ZeroMemory(&m_SockMsg, sizeof(m_SockMsg));
        ZeroMemory(&m_HostName.buf, sizeof(m_HostName.buf));
        ZeroMemory(&m_LocalNet, sizeof(m_LocalNet));
        ZeroMemory(&m_LocalAddr, sizeof(m_LocalAddr));
        ZeroMemory(&m_PeerAddr, sizeof(m_PeerAddr));
}

IBaseSocket::~IBaseSocket()
{
        doCloseSocket(m_hSocket);

        if (m_fWnd)
        {
                DestroyWindow();
        }
}

LRESULT IBaseSocket::OnSocketMessage(WPARAM wParam, LPARAM lParam)
{
        SOCKET hSocket = (SOCKET)wParam;
        int nEventCode = WSAGETSELECTEVENT(lParam);
        int nErrorCode = WSAGETSELECTERROR(lParam);

        switch (nEventCode)
        {
        case FD_CONNECT:
                OnConnect(hSocket, nErrorCode);
                break;

        case FD_ACCEPT:
                OnAccept(hSocket, nErrorCode);
                break;

        case FD_WRITE:
                OnSend(hSocket, nErrorCode);
                break;

        case FD_READ:
                OnReceive(hSocket, nErrorCode);
                break;

        case FD_CLOSE:
                OnClose(hSocket, nErrorCode);
                break;
        }

        return 0;
}

LRESULT IBaseSocket::OnGetHostMessage(WPARAM wParam, LPARAM lParam)
{
        int nErrorCode = WSAGETSELECTERROR(lParam);
        HANDLE hTask   = (HANDLE)wParam;

        doGetHostByName(hTask, nErrorCode);

        return 0;
}

BOOL IBaseSocket::CreateSocketWindow()
{
        CString strClass;
        CRect   rect;

        if (m_fWnd)
        {
                // Window has already been created.
                DestroyWindow();
                m_fWnd = FALSE;
        }

        try
        {
                strClass = AfxRegisterWndClass(0);
        }
        catch (CResourceException *e) 
        {
                TRACE0("***** ERROR: AfxRegisterWndClass *****\n");
                m_dwError = GetLastError();
                e->Delete();
                return FALSE;
        }

        if (!strClass.IsEmpty())
        {
                rect.SetRect(0, 0, 100, 100);

                if (CreateEx(0, strClass, NULL, WS_OVERLAPPEDWINDOW, rect, NULL, 0))
                {
                        m_fWnd = TRUE;
                        return TRUE;
                }
                else
                {
                        TRACE0("***** ERROR: CreateEx *****\n");
                        m_dwError = GetLastError();
                        return FALSE;
                }
        }

        TRACE0("***** ERROR: CreateSocketWindow *****\n");

        return FALSE;
}

BOOL IBaseSocket::CloseSocket()
{
        m_fInit = !doCloseSocket(m_hSocket);
        return m_fInit;
}

BOOL IBaseSocket::IsLANConnection(const LPSOCKADDR lpSockAddr)
{
        SOCKADDR_IN siAddr;
        CopyMemory(&siAddr, lpSockAddr, sizeof(siAddr));
        return (m_LocalNet.dwNet == (m_LocalNet.dwMask & siAddr.sin_addr.s_addr));
}

void IBaseSocket::MakeSockAddrIN(LPSOCKADDR_IN lpSockAddrIN, DWORD dwAddress, 
                                                                 WORD wPort, UINT nAF)
{
        ZeroMemory(lpSockAddrIN, sizeof(LPSOCKADDR_IN));
        lpSockAddrIN->sin_port             = htons(wPort);
        lpSockAddrIN->sin_family           = nAF;
        lpSockAddrIN->sin_addr.s_addr  = dwAddress;
}

void IBaseSocket::ConvertSockAddrToNetAddr(const LPSOCKADDR lpSockAddr, NETADDR &NetAddr)
{
        SOCKADDR_IN siAddr;
        CopyMemory(&siAddr, lpSockAddr, sizeof(siAddr));
        NetAddr.wPort     = ntohs(siAddr.sin_port);
        NetAddr.nAF               = siAddr.sin_family;
        NetAddr.dwAddress = siAddr.sin_addr.s_addr;
}

BOOL IBaseSocket::Shutdown(int nFlag)
{
        return doShutdown(m_hSocket, nFlag);
}

BOOL IBaseSocket::AsyncSelect(LONG lEvent)
{
        if (doAsyncSelect(m_hSocket, SM_EVENT, lEvent))
        {
                m_lEvent        = lEvent;
                m_fBlocking = FALSE;
                return TRUE;
        }

        return FALSE;
}

BOOL IBaseSocket::AsyncGetHostByName(const LPCSTR szHostName)
{
        return doAsyncGetHostByName(SM_GETHOST, szHostName, m_HostName.buf, sizeof(m_HostName.buf));
}

BOOL IBaseSocket::SetBlocking()
{
        BOOL fRet = TRUE;

        if (m_fBlocking)
        {
                fRet = doSetBlocking(m_hSocket);

                if (fRet)
                {
                        m_fBlocking = TRUE;
                        m_lEvent        = 0;
                }
        }

        return FALSE;
}

BOOL IBaseSocket::Bind(WORD wPort, DWORD dwAddress)
{
        return doBind(m_hSocket, wPort, dwAddress);
}

BOOL IBaseSocket::GetSockName(LPSOCKADDR lpSockAddr)
{
        return doGetSockName(m_hSocket, lpSockAddr);
}

BOOL IBaseSocket::GetPeerName(LPSOCKADDR lpSockAddr)
{
        return doGetPeerName(m_hSocket, lpSockAddr);
}

BOOL IBaseSocket::SetSockOpt(int nOptionName, LPCSTR lpOptionValue, 
                                                         int nOptionLen, int nLevel)
{
        return doSetSockOpt(m_hSocket, nLevel, nOptionName, lpOptionValue, nOptionLen);
}

BOOL IBaseSocket::GetSockOpt(int nOptionName, LPSTR lpOptionValue, 
                                                         int *lpOptionLen, int nLevel)
{
        return doGetSockOpt(m_hSocket, nLevel, nOptionName, lpOptionValue, lpOptionLen);
}

BOOL IBaseSocket::SetSendTimeout(DWORD dwTimeout)
{
        return doSetSendTimeout(m_hSocket, dwTimeout);
}

BOOL IBaseSocket::SetRecieveTimeout(DWORD dwTimeout)
{
        return doSetReceiveTimeout(m_hSocket, dwTimeout);
}

BOOL IBaseSocket::SetSendBufferSize(DWORD dwBufSize)
{
        return doSetSendBufferSize(m_hSocket, dwBufSize);
}

BOOL IBaseSocket::SetReceiveBufferSize(DWORD dwBufSize)
{
        return doSetReceiveBufferSize(m_hSocket, dwBufSize);
}

BOOL IBaseSocket::SetKeepAlive(DWORD dwTime, DWORD dwInterval)
{
        return doSetKeepAlive(m_hSocket, dwTime, dwInterval);
}

BOOL IBaseSocket::SetReuseAddr(BOOL flag)
{
        return doSetReuseAddr(m_hSocket, flag);
}

BOOL IBaseSocket::IOCtlSocket(LONG lCommand, DWORD *lpArgument)
{
        return doIOCtlSocket(m_hSocket, lCommand, lpArgument);
}

BOOL IBaseSocket::WSAIOCtl(DWORD dwIoCtlCode, LPVOID lpInBuf, DWORD dwInBuf, 
                                                   LPVOID lpOutBuf, DWORD dwOutBuf, LPDWORD dwByteReturned, 
                                                   LPWSAOVERLAPPED lpOverlapped, 
                                                   LPWSAOVERLAPPED_COMPLETION_ROUTINE lpCompletionRoutine)
{
        return doWSAIOCtl(m_hSocket, dwIoCtlCode, lpInBuf, dwInBuf, lpOutBuf, dwOutBuf,
                                          dwByteReturned, lpOverlapped, lpCompletionRoutine);
}

void IBaseSocket::GetLocalAddress(NETADDR &NetAddr)
{
        ConvertSockAddrToNetAddr(&m_LocalAddr, NetAddr);
}

void IBaseSocket::GetPeerAddress(NETADDR &NetAddr)
{
        ConvertSockAddrToNetAddr(&m_PeerAddr, NetAddr);
}

BOOL IBaseSocket::Send(const CByteArray &data)
{
        return doSend(m_hSocket, data);
}

BOOL IBaseSocket::Receive(CByteArray &data)
{
        return doReceive(m_hSocket, data);
}

BOOL IBaseSocket::SendTo(const CByteArray &data, const LPSOCKADDR lpSockAddr, int nSockAddrLen)
{
        return doSendTo(m_hSocket, data, lpSockAddr, nSockAddrLen);
}

BOOL IBaseSocket::ReceiveFrom(CByteArray &data, LPSOCKADDR lpSockAddr, int *lpSockAddrLen)
{
        return doReceiveFrom(m_hSocket, data, lpSockAddr, lpSockAddrLen);
}

//////////////////////////////////////////////////////////////////////////

BOOL IBaseSocket::doGetHostByName(HANDLE hTask, int nErrorCode)
{
        LPHOSTENT lpHostEnt = reinterpret_cast<LPHOSTENT>(m_HostName.buf);

        if (m_HostName.hTask != hTask)
        {
                TRACE0("***** ERROR: GetHostByName(Handle) *****\n");
                return FALSE;
        }

        m_SockMsg.pTgtObj->OnGetHostByNameMessage(lpHostEnt);

        return TRUE;
}

BOOL IBaseSocket::doCloseSocket(SOCKET hSocket)
{
        if (closesocket(hSocket) != 0)
        {
                TRACE1("***** ERROR: closesocket(%d) *****\n", GetLastError());
                m_dwError = GetLastError();
                return FALSE;
        }

        hSocket  = INVALID_SOCKET;
        m_lEvent = 0;

        return TRUE;
}

BOOL IBaseSocket::doShutdown(SOCKET hSocket, int nFlag)
{
        if (shutdown(hSocket, nFlag) == SOCKET_ERROR)
        {
                TRACE1("***** ERROR: shutdown(%d) *****\n", GetLastError());
                m_dwError = GetLastError();
                return FALSE;
        }

        return TRUE;
}

BOOL IBaseSocket::doAsyncSelect(SOCKET hSocket, UINT uMsg, LONG lEvent)
{
        if (WSAAsyncSelect(hSocket, m_hWnd, SM_EVENT, lEvent) != 0)
        {
                TRACE1("***** ERROR: WSAAsyncSelect(%d) *****\n", GetLastError());
                m_dwError = GetLastError();
                return FALSE;
        }

        return TRUE;
}

BOOL IBaseSocket::doAsyncGetHostByName(UINT uMsg, const LPCSTR szHostName, LPSTR szHostEnt, int nBufLen)
{
        ZeroMemory(szHostEnt, nBufLen);

        m_HostName.hTask = WSAAsyncGetHostByName(m_hWnd, uMsg, szHostName, szHostEnt, nBufLen);

        if (m_HostName.hTask != 0)
        {
                TRACE1("***** ERROR: WSAAsyncGetHostByName(%d) *****\n", GetLastError());
                m_dwError = GetLastError();
                return FALSE;
        }

        return TRUE;
}

BOOL IBaseSocket::doSetBlocking(SOCKET hSocket)
{
        DWORD dwVal = 0;
        return (doAsyncSelect(hSocket, 0, 0) & doIOCtlSocket(hSocket, FIONBIO, &dwVal));
}

BOOL IBaseSocket::doBind(SOCKET hSocket, WORD wPort, DWORD dwAddress)
{
        SOCKADDR_IN siAddr;

        MakeSockAddrIN(&siAddr, dwAddress, wPort);

        if (bind(hSocket, (LPSOCKADDR)&siAddr, sizeof(siAddr)) == SOCKET_ERROR)
        {
                TRACE1("***** ERROR: bind(%d) *****\n", GetLastError());
                m_dwError = GetLastError();
                return FALSE;
        }

        m_wBindPort = wPort;

        return TRUE;
}

BOOL IBaseSocket::doGetSockName(SOCKET hSocket, LPSOCKADDR lpSockAddr)
{
        int nLenSA = sizeof(SOCKADDR);

        if (getsockname(hSocket, lpSockAddr, &nLenSA) != 0)
        {
                TRACE1("***** ERROR: getsockname(%d) *****\n", GetLastError());
                m_dwError = GetLastError();
                return FALSE;
        }

        return TRUE;
}

BOOL IBaseSocket::doGetPeerName(SOCKET hSocket, LPSOCKADDR lpSockAddr)
{
        int nLenSA = sizeof(SOCKADDR);

        if (getpeername(hSocket, lpSockAddr, &nLenSA) != 0)
        {
                TRACE1("***** ERROR: getpeername(%d) *****\n", GetLastError());
                m_dwError = GetLastError();
                return FALSE;
        }

        return TRUE;
}

BOOL IBaseSocket::doSetSockOpt(SOCKET hSocket, int nLevel, int nOptionName,
                                                           LPCSTR lpOptionValue, int nOptionLen)
{
        if (setsockopt(hSocket, nLevel, nOptionName, lpOptionValue, nOptionLen) == SOCKET_ERROR)
        {
                TRACE2("***** ERROR: setsockopt(%d) option(%d) *****\n", GetLastError(), nOptionName);
                m_dwError = GetLastError();
                return FALSE;
        }

        return TRUE;
}

BOOL IBaseSocket::doGetSockOpt(SOCKET hSocket, int nLevel, int nOptionName, 
                                                           LPSTR lpOptionValue, int *lpOptionLen)
{
        if (getsockopt(hSocket, nLevel, nOptionName, lpOptionValue, lpOptionLen) == SOCKET_ERROR)
        {
                TRACE2("***** ERROR: getsockopt(%d) option(%d) *****\n", GetLastError(), nOptionName);
                m_dwError = GetLastError();
                return FALSE;
        }

        return TRUE;
}

BOOL IBaseSocket::doSetSendTimeout(SOCKET hSocket, DWORD dwTimeout)
{
        return doSetSockOpt(hSocket, SOL_SOCKET, SO_SNDTIMEO, (LPSTR)&dwTimeout, sizeof(dwTimeout));
}

BOOL IBaseSocket::doSetReceiveTimeout(SOCKET hSocket, DWORD dwTimeout)
{
        return doSetSockOpt(hSocket, SOL_SOCKET, SO_RCVTIMEO, (LPSTR)&dwTimeout, sizeof(dwTimeout));
}

BOOL IBaseSocket::doSetSendBufferSize(SOCKET hSocket, DWORD dwBufSize)
{
        return doSetSockOpt(hSocket, SOL_SOCKET, SO_SNDBUF, (LPSTR)&dwBufSize, sizeof(dwBufSize));
}

BOOL IBaseSocket::doSetReceiveBufferSize(SOCKET hSocket, DWORD dwBufSize)
{
        return doSetSockOpt(hSocket, SOL_SOCKET, SO_RCVBUF, (LPSTR)&dwBufSize, sizeof(dwBufSize));
}

BOOL IBaseSocket::doSetReuseAddr(SOCKET hSocket, BOOL flag)
{
        return doSetSockOpt(hSocket, SOL_SOCKET, SO_REUSEADDR, (LPSTR)&flag, sizeof(flag));
}

BOOL IBaseSocket::doSetKeepAlive(SOCKET hSocket, DWORD dwKaTime, DWORD dwInterval)
{
        struct tcp_keepalive tkaSet, tkaRet;
        DWORD dwBytes;
        BOOL  flag = TRUE;

        if (!doSetSockOpt(hSocket, SOL_SOCKET, SO_KEEPALIVE, (LPSTR)&flag, sizeof(flag)))
        {
                return FALSE;
        }

        ZeroMemory(&tkaSet, sizeof(tkaSet));
        ZeroMemory(&tkaRet, sizeof(tkaRet));
        tkaSet.onoff                     = 1;
        tkaSet.keepalivetime     = dwKaTime;
        tkaSet.keepaliveinterval = dwInterval;

        if (!doWSAIOCtl(hSocket, SIO_KEEPALIVE_VALS, &tkaSet, sizeof(tkaSet),
                &tkaRet, sizeof(tkaRet), &dwBytes, NULL, NULL))
        {
                return FALSE;
        }

        return TRUE;
}

BOOL IBaseSocket::doIOCtlSocket(SOCKET hSocket, LONG lCommand, DWORD *lpArgument)
{
        if (ioctlsocket(hSocket, lCommand, lpArgument) == SOCKET_ERROR)
        {
                TRACE1("***** ERROR: ioctlsocket(%d) *****\n", GetLastError());
                m_dwError = GetLastError();
                return FALSE;
        }

        return TRUE;
}

BOOL IBaseSocket::doWSAIOCtl(SOCKET hSocket, DWORD dwIoCtlCode, LPVOID lpInBuf, DWORD dwInBuf, LPVOID lpOutBuf, 
                                                         DWORD dwOutBuf, LPDWORD dwByteReturned, LPWSAOVERLAPPED lpOverlapped, 
                                                         LPWSAOVERLAPPED_COMPLETION_ROUTINE lpCompletionRoutine)
{
        if (WSAIoctl(hSocket, dwIoCtlCode, lpInBuf, dwInBuf, lpOutBuf, 
                dwOutBuf, dwByteReturned, lpOverlapped, lpCompletionRoutine) == SOCKET_ERROR)
        {
                TRACE1("***** ERROR: WSAIoctl(%d) *****\n", GetLastError());
                m_dwError = GetLastError();
                return FALSE;
        }

        return TRUE;
}

BOOL IBaseSocket::doSend(SOCKET hSocket, const CByteArray &data)
{
        CByteArray snd;
        HEADER header;
        size_t dataSize, hdrSize;
        size_t dataPtr, hdrPtr;
        LONG   lEvent;
        BOOL   fResult;
        int    nRet;

        lEvent = (hSocket == m_hSocket) ? m_lEvent : (FD_READ | FD_WRITE | FD_CLOSE);

        if ((lEvent != 0) && (lEvent & FD_WRITE))
        {
                // FD_WRITE cancel
                doAsyncSelect(hSocket, SM_EVENT, (lEvent ^ FD_WRITE));
        }

        dataSize = data.GetSize();
        hdrSize  = sizeof(HEADER);
        dataPtr  = 0;
        hdrPtr   = 0;
        fResult  = TRUE;

        header.size = dataSize;
        snd.SetSize(hdrSize);
        CopyMemory(snd.GetData(), &header, hdrSize);
        snd.FreeExtra();

        do 
        {
                // Send header
                nRet = send(hSocket, DATA_SEND(snd.GetData() + hdrPtr), hdrSize, 0);

                if (nRet == SOCKET_ERROR)
                {
                        m_dwError = GetLastError();

                        if (m_dwError == WSAEWOULDBLOCK)
                        {
                                continue;
                        }
                        else
                        {
                                TRACE1("***** ERROR: send header(%d) *****\n", m_dwError);
                                fResult = FALSE;
                                break;
                        }
                }
                else
                {
                        hdrPtr  += nRet;
                        hdrSize -= nRet;
                }
        } 
        while (hdrSize > 0);

        if (fResult)
        {
                do
                {
                        // Send data
                        nRet = send(hSocket, DATA_SEND(data.GetData() + dataPtr), dataSize, 0);

                        if (nRet == SOCKET_ERROR)
                        {
                                m_dwError = GetLastError();

                                if (m_dwError == WSAEWOULDBLOCK)
                                {
                                        continue;
                                }
                                else
                                {
                                        TRACE1("***** ERROR: send data(%d) *****\n", m_dwError);
                                        fResult = FALSE;
                                        break;
                                }
                        }
                        else
                        {
                                dataPtr  += nRet;
                                dataSize -= nRet;
                        }
                }
                while (dataSize > 0);
        }

        if ((lEvent != 0) && (lEvent & FD_WRITE))
        {
                // FD_WRITE setting
                doAsyncSelect(hSocket, SM_EVENT, lEvent);
        }

        return fResult;
}

BOOL IBaseSocket::doReceive(SOCKET hSocket, CByteArray &data)
{
        HEADER header;
        size_t recvSize;
        size_t dataSize;
        size_t bufPtr;
        BOOL   fResult;
        LONG   lEvent;
        int        nRet;

        lEvent = (hSocket == m_hSocket) ? m_lEvent : (FD_READ | FD_WRITE | FD_CLOSE);

        if ((lEvent != 0) && (lEvent & FD_READ))
        {
                // FD_READ cancel
                doAsyncSelect(hSocket, SM_EVENT, (lEvent ^ FD_READ));
        }

        // Receive header
        nRet = recv(hSocket, DATA_RECEIVE(&header), sizeof(HEADER), MSG_PEEK);

        if (nRet == sizeof(HEADER))
        {
                dataSize = header.size + sizeof(HEADER);
                recvSize = dataSize;
                bufPtr   = 0;

                data.RemoveAll();
                data.SetSize(dataSize);
                fResult = TRUE;

                do
                {
                        // Receive data
                        nRet = recv(hSocket, DATA_RECEIVE(data.GetData() + bufPtr), recvSize, 0);

                        if (nRet == SOCKET_ERROR)
                        {
                                m_dwError = GetLastError();

                                if (m_dwError == WSAEWOULDBLOCK)
                                {
                                        continue;
                                }
                                else
                                {
                                        TRACE1("***** ERROR: recv - Data(%d) *****\n", m_dwError);
                                        fResult = FALSE;
                                        break;
                                }
                        }
                        else
                        {
                                bufPtr   += nRet;
                                recvSize -= nRet;
                        }
                }
                while (recvSize > 0);

                // Header remove
                if (data.GetSize() >= sizeof(HEADER))
                {
                        data.RemoveAt(0, sizeof(HEADER));
                }
        }
        else
        {
                TRACE1("***** ERROR: recv - Header(%d) *****\n", GetLastError());
                m_dwError = GetLastError();
                fResult = FALSE;
        }

        if ((lEvent != 0) && (lEvent & FD_READ))
        {
                // FD_READ setting
                doAsyncSelect(hSocket, SM_EVENT, lEvent);
        }

        return fResult;
}

BOOL IBaseSocket::doSendTo(SOCKET hSocket, const CByteArray &data, const LPSOCKADDR lpSockAddr, int nSockAddrLen)
{
        int     nRet;

        nRet = sendto(hSocket, reinterpret_cast<LPSTR>(const_cast<BYTE *>(data.GetData())), 
                                  SX_UDP_BUFSIZE, 0, lpSockAddr, nSockAddrLen);

        if (nRet == SOCKET_ERROR)
        {
                TRACE1("***** ERROR: sendto(%d) *****\n", GetLastError());
                m_dwError = GetLastError();
                return FALSE;
        }

        return TRUE;
}

BOOL IBaseSocket::doReceiveFrom(SOCKET hSocket, CByteArray &data, LPSOCKADDR lpSockAddr, int *lpSockAddrLen)
{
        int     nRet;
        int     nLenSA = sizeof(SOCKADDR);

        if (data.GetSize() != SX_UDP_BUFSIZE)
        {
                data.RemoveAll();
                data.SetSize(SX_UDP_BUFSIZE);
        }

        nRet = recvfrom(hSocket, reinterpret_cast<LPSTR>(data.GetData()),
                                        SX_UDP_BUFSIZE, 0, lpSockAddr, lpSockAddrLen);

        if (nRet == SOCKET_ERROR)
        {
                TRACE1("***** ERROR: recvfrom(%d) *****\n", GetLastError());
                m_dwError = GetLastError();
                return FALSE;
        }

        data.FreeExtra();

        return TRUE;
}

//////////////////////////////////////////////////////////////////////////
