MFC TCP/IP 통신에 질문좀 드립니다.

로봇과 PC 이더넷 통신을 할려고하는데요

연결은되나 데이터가 들어가지를 않습니다.

하이퍼 터미널과 PC 통신은 되구요

하이퍼 터미널에서 숫자 1 이나 2 를 주게 되면 정상적으로 데이터를 받습니다.

PC 에서 1 이나 2를 주면 동작을 하지 않네요..

로봇, 하이퍼터미널로 숫자 1이나 2값을 PC로 주면 1에 이상한 값이 같이 출력됩니다...

전체 소스를 올려 보겟습니다.

BOOL CServerDlg::OnInitDialog()
{
CDialog::OnInitDialog();

// Add "About..." menu item to system menu.

// IDM_ABOUTBOX must be in the system command range.
ASSERT((IDM_ABOUTBOX & 0xFFF0) == IDM_ABOUTBOX);
ASSERT(IDM_ABOUTBOX < 0xF000);

CMenu* pSysMenu = GetSystemMenu(FALSE);
if (pSysMenu != NULL)
{
CString strAboutMenu;
strAboutMenu.LoadString(IDS_ABOUTBOX);
if (!strAboutMenu.IsEmpty())
{
pSysMenu->AppendMenu(MF_SEPARATOR);
pSysMenu->AppendMenu(MF_STRING, IDM_ABOUTBOX, strAboutMenu);
}
}

// Set the icon for this dialog. The framework does this automatically
// when the application's main window is not a dialog
SetIcon(m_hIcon, TRUE); // Set big icon
SetIcon(m_hIcon, FALSE); // Set small icon

// TODO: Add extra initialization here
m_pServerSock = new CServerSock();
m_pServerSock->Create(700);
m_pServerSock->Listen();

return TRUE; // return TRUE unless you set the focus to a control
}

void CServerDlg::OnSysCommand(UINT nID, LPARAM lParam)
{
if ((nID & 0xFFF0) == IDM_ABOUTBOX)
{
CAboutDlg dlgAbout;
dlgAbout.DoModal();
}
else
{
CDialog::OnSysCommand(nID, lParam);
}
}

// If you add a minimize button to your dialog, you will need the code below
// to draw the icon. For MFC applications using the document/view model,
// this is automatically done for you by the framework.

void CServerDlg::OnPaint()
{
if (IsIconic())
{
CPaintDC dc(this); // device context for painting

SendMessage(WM_ICONERASEBKGND, (WPARAM) dc.GetSafeHdc(), 0);

// Center icon in client rectangle
int cxIcon = GetSystemMetrics(SM_CXICON);
int cyIcon = GetSystemMetrics(SM_CYICON);
CRect rect;
GetClientRect(&rect);
int x = (rect.Width() - cxIcon + 1) / 2;
int y = (rect.Height() - cyIcon + 1) / 2;

// Draw the icon
dc.DrawIcon(x, y, m_hIcon);
}
else
{
CDialog::OnPaint();
}
}

// The system calls this to obtain the cursor to display while the user drags
// the minimized window.
HCURSOR CServerDlg::OnQueryDragIcon()
{
return (HCURSOR) m_hIcon;
}

void CServerDlg::OnAccept()
{
UpdateData(TRUE);
CClientSock *p = new CClientSock;
m_pServerSock->Accept(*p);
p->Send("연결되었습니다.", 16);
m_clientSocks.AddTail(p);
}

void CServerDlg::OnReceive(CClientSock* pSock)
{
UpdateData(TRUE);
char buf[1];
pSock->Receive(buf,1);
m_listReceive.InsertString(0, buf);
Send(buf);
}

void CServerDlg::OnSend()
{
// TODO: Add your control notification handler code here
UpdateData(TRUE);
char buf[1];
lstrcpy(buf, (const char*)m_strSend);
lstrcat(buf,"\r\n");
Send(buf);
}

void CServerDlg::Send(char *buf)
{
POSITION pos = m_clientSocks.GetHeadPosition();
while (pos != NULL)
{
CClientSock *p = m_clientSocks.GetNext(pos);
p->Send(buf, strlen(buf)+1);
}
}