exemple mfcsoc mais en mode UDP

L'exemple MFCSocs est une application MFC minimale qui indique comment utiliser les classes CSocket et CAsyncSocket pour communiquer dans une connexion TCP. Cet exemple est une application basée sur les boîtes de dialogue. Selon la sélection dans l'interface utilisateur, l'application peut s'exécuter à un serveur sur le même port TCP comme un serveur TCP à l'écoute sur certain port TCP ou un client qui se connecte.Lorsqu' être exécutée sous un client, l'application utilise la classe CSocket pour communiquer avec le serveur. Lorsqu' exécuter comme un serveur, l'application utilise CAsyncSocket pour écouter des demandes de connexion et pour communiquer après l'établissement de la connexion avec le client.

J'ai pour but :yaisse2: de faire exactement la meme chose mais en utilisant le protocole UDP et comme j'ai un peu du mal en C++ je sollicite votre aide.

Dans l'application d'origine cad en TCP on fait un CONNECT en mode client et un ACCEPT en mode SERVEUR. Tandis quand mode UDP on ne fait pas tout sa il faut faire des BIND des 2 cotés.

De plus je pense qu'il faut remplacer tout les send (resp recv) par des senTo (resp recvFrom) or ces methodes demande plus de parametres.

Que dois je changer pour obtenir exactement la meme programme mais en utilisant le protocole UDP.

Vous trouverai le code source du programme sur msdn :
http://download.microsoft.com/downlo...us/mfcsocs.exe

sinon voici les morceau les plus important

Code:

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
 
// Asynlstn.cpp : implementation file
//
 
#include "stdafx.h"
#include "msocs.h"
 
#include "ClntSock.h"
#include "AsynLstn.h"
#include "AsynSvSk.h"
#include "msocsDlg.h"
 
#ifdef _DEBUG
#define new DEBUG_NEW
#undef THIS_FILE
static char THIS_FILE[] = __FILE__;
#endif
 
 
/////////////////////////////////////////////////////////////////////////////
// CAsynlstn
 
CAsynlstn::CAsynlstn(CDialog* pDlg)
{
	m_pDlg = pDlg;
}
 
CAsynlstn::~CAsynlstn()
{
}
 
 
// Do not edit the following lines, which are needed by ClassWizard.
#if 0
BEGIN_MESSAGE_MAP(CAsynlstn, CAsyncSocket)
	//{{AFX_MSG_MAP(CAsynlstn)
	//}}AFX_MSG_MAP
END_MESSAGE_MAP()
#endif	// 0
 
/////////////////////////////////////////////////////////////////////////////
// CAsynlstn member functions
 
void CAsynlstn::OnAccept(int nErrorCode) 
{
	// TODO: Add your specialized code here and/or call the base class
	if (((CMsocsDlg*)m_pDlg)->m_pSrvrSock) 
	{
		AfxMessageBox ("Only allow one message socket at a time");
		CAsynSvSk tempSvSk(NULL);
		Accept(tempSvSk);
		tempSvSk.Close();
	}
	else
	{
		if (IDYES ==AfxMessageBox ("Do you want to accept the incoming connection", MB_YESNO))
		{
			if ((((CMsocsDlg*)m_pDlg)->m_pSrvrSock = new CAsynSvSk(m_pDlg)) == NULL)
			{
				AfxMessageBox("Failed to allocate server socket");
				return;
			}
			((CMsocsDlg*)m_pDlg)->m_pSrvrSock->m_sendBuffer = "";   //for async send
			((CMsocsDlg*)m_pDlg)->m_pSrvrSock->m_nBytesSent = 0;
			((CMsocsDlg*)m_pDlg)->m_pSrvrSock->m_nBytesBufferSize = 0;
			((CMsocsDlg*)m_pDlg)->GetDlgItem(IDC_CLOSESOCK)->EnableWindow(TRUE);
 
			Accept(*((CMsocsDlg*)m_pDlg)->m_pSrvrSock);
		}
		else
		{
			CAsynSvSk tempSvSk(NULL);
			Accept(tempSvSk);
			tempSvSk.Close();
		}
	}
	CAsyncSocket::OnAccept(nErrorCode);
}
 
void CAsynlstn::OnClose(int nErrorCode) 
{
	// TODO: Add your specialized code here and/or call the base class
	((CMsocsDlg*)m_pDlg)->m_pLstnSock = NULL;		
	CAsyncSocket::OnClose(nErrorCode);
}
 
void CAsynlstn::OnConnect(int nErrorCode) 
{
	// TODO: Add your specialized code here and/or call the base class
	CAsyncSocket::OnConnect(nErrorCode);
}
 
void CAsynlstn::OnOutOfBandData(int nErrorCode) 
{
	// TODO: Add your specialized code here and/or call the base class
	CAsyncSocket::OnOutOfBandData(nErrorCode);
}
 
void CAsynlstn::OnReceive(int nErrorCode) 
{
	// TODO: Add your specialized code here and/or call the base class
	CAsyncSocket::OnReceive(nErrorCode);
}
 
void CAsynlstn::OnSend(int nErrorCode) 
{
	// TODO: Add your specialized code here and/or call the base class
	CAsyncSocket::OnSend(nErrorCode);
}
 
int CAsynlstn::Receive(void* lpBuf, int nBufLen, int nFlags) 
{
	// TODO: Add your specialized code here and/or call the base class
	return CAsyncSocket::Receive(lpBuf, nBufLen, nFlags);
}
 
int CAsynlstn::Send(const void* lpBuf, int nBufLen, int nFlags) 
{
	// TODO: Add your specialized code here and/or call the base class
	return CAsyncSocket::Send(lpBuf, nBufLen, nFlags);
}

Code:

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
 
// Asynlstn.cpp : implementation file
//
 
#include "stdafx.h"
#include "msocs.h"
 
#include "ClntSock.h"
#include "AsynLstn.h"
#include "AsynSvSk.h"
#include "msocsDlg.h"
 
#ifdef _DEBUG
#define new DEBUG_NEW
#undef THIS_FILE
static char THIS_FILE[] = __FILE__;
#endif
 
 
/////////////////////////////////////////////////////////////////////////////
// CAsynlstn
 
CAsynlstn::CAsynlstn(CDialog* pDlg)
{
	m_pDlg = pDlg;
}
 
CAsynlstn::~CAsynlstn()
{
}
 
 
// Do not edit the following lines, which are needed by ClassWizard.
#if 0
BEGIN_MESSAGE_MAP(CAsynlstn, CAsyncSocket)
	//{{AFX_MSG_MAP(CAsynlstn)
	//}}AFX_MSG_MAP
END_MESSAGE_MAP()
#endif	// 0
 
/////////////////////////////////////////////////////////////////////////////
// CAsynlstn member functions
 
void CAsynlstn::OnAccept(int nErrorCode) 
{
	// TODO: Add your specialized code here and/or call the base class
	if (((CMsocsDlg*)m_pDlg)->m_pSrvrSock) 
	{
		AfxMessageBox ("Only allow one message socket at a time");
		CAsynSvSk tempSvSk(NULL);
		Accept(tempSvSk);
		tempSvSk.Close();
	}
	else
	{
		if (IDYES ==AfxMessageBox ("Do you want to accept the incoming connection", MB_YESNO))
		{
			if ((((CMsocsDlg*)m_pDlg)->m_pSrvrSock = new CAsynSvSk(m_pDlg)) == NULL)
			{
				AfxMessageBox("Failed to allocate server socket");
				return;
			}
			((CMsocsDlg*)m_pDlg)->m_pSrvrSock->m_sendBuffer = "";   //for async send
			((CMsocsDlg*)m_pDlg)->m_pSrvrSock->m_nBytesSent = 0;
			((CMsocsDlg*)m_pDlg)->m_pSrvrSock->m_nBytesBufferSize = 0;
			((CMsocsDlg*)m_pDlg)->GetDlgItem(IDC_CLOSESOCK)->EnableWindow(TRUE);
 
			Accept(*((CMsocsDlg*)m_pDlg)->m_pSrvrSock);
		}
		else
		{
			CAsynSvSk tempSvSk(NULL);
			Accept(tempSvSk);
			tempSvSk.Close();
		}
	}
	CAsyncSocket::OnAccept(nErrorCode);
}
 
void CAsynlstn::OnClose(int nErrorCode) 
{
	// TODO: Add your specialized code here and/or call the base class
	((CMsocsDlg*)m_pDlg)->m_pLstnSock = NULL;		
	CAsyncSocket::OnClose(nErrorCode);
}
 
void CAsynlstn::OnConnect(int nErrorCode) 
{
	// TODO: Add your specialized code here and/or call the base class
	CAsyncSocket::OnConnect(nErrorCode);
}
 
void CAsynlstn::OnOutOfBandData(int nErrorCode) 
{
	// TODO: Add your specialized code here and/or call the base class
	CAsyncSocket::OnOutOfBandData(nErrorCode);
}
 
void CAsynlstn::OnReceive(int nErrorCode) 
{
	// TODO: Add your specialized code here and/or call the base class
	CAsyncSocket::OnReceive(nErrorCode);
}
 
void CAsynlstn::OnSend(int nErrorCode) 
{
	// TODO: Add your specialized code here and/or call the base class
	CAsyncSocket::OnSend(nErrorCode);
}
 
int CAsynlstn::Receive(void* lpBuf, int nBufLen, int nFlags) 
{
	// TODO: Add your specialized code here and/or call the base class
	return CAsyncSocket::Receive(lpBuf, nBufLen, nFlags);
}
 
int CAsynlstn::Send(const void* lpBuf, int nBufLen, int nFlags) 
{
	// TODO: Add your specialized code here and/or call the base class
	return CAsyncSocket::Send(lpBuf, nBufLen, nFlags);
}

Code:

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
 
// ClntSock.cpp : implementation file
//
 
#include "stdafx.h"
#include "msocs.h"
 
#include "ClntSock.h"
#include "AsynLstn.h"
#include "AsynSvSk.h"
#include "msocsDlg.h"
 
#ifdef _DEBUG
#define new DEBUG_NEW
#undef THIS_FILE
static char THIS_FILE[] = __FILE__;
#endif
 
/////////////////////////////////////////////////////////////////////////////
// CClntSock
 
CClntSock::CClntSock(CDialog* pDlg)
{
	m_pDlg = pDlg;
}
 
CClntSock::~CClntSock()
{
}
 
 
// Do not edit the following lines, which are needed by ClassWizard.
#if 0
BEGIN_MESSAGE_MAP(CClntSock, CSocket)
	//{{AFX_MSG_MAP(CClntSock)
	//}}AFX_MSG_MAP
END_MESSAGE_MAP()
#endif	// 0
 
/////////////////////////////////////////////////////////////////////////////
// CClntSock member functions
 
void CClntSock::OnAccept(int nErrorCode) 
{
	CSocket::OnAccept(nErrorCode);
}
 
void CClntSock::OnClose(int nErrorCode) 
{
	((CMsocsDlg*)m_pDlg)->m_pClientSock = NULL;
	((CMsocsDlg*)m_pDlg)->m_strRecv = "";
	((CMsocsDlg*)m_pDlg)->m_strSend = "";
	((CMsocsDlg*)m_pDlg)->UpdateData(FALSE);
	((CMsocsDlg*)m_pDlg)->GetDlgItem(IDC_CLOSESOCK)->EnableWindow(FALSE);
	CSocket::OnClose(nErrorCode);
	delete this;
}
 
void CClntSock::OnConnect(int nErrorCode) 
{
	if (!nErrorCode)
	{
		TCHAR szError[256];
		wsprintf(szError, "OnConnect error: %d", nErrorCode);
		AfxMessageBox(szError);
		AfxMessageBox("Please close the application");
	}
	CSocket::OnConnect(nErrorCode);
}
 
BOOL CClntSock::OnMessagePending() 
{
	return CSocket::OnMessagePending();
}
 
void CClntSock::OnOutOfBandData(int nErrorCode) 
{
	CSocket::OnOutOfBandData(nErrorCode);
}
 
void CClntSock::OnReceive(int nErrorCode) 
{
	TCHAR buff[4096];
	int nRead;
	nRead = Receive(buff, 4096); 
	if (nRead != SOCKET_ERROR)
	{
		if (nRead)
		{
			buff[nRead] = 0; 
			CString szTemp(buff);
			((CMsocsDlg*)m_pDlg)->m_strRecv += szTemp;
			((CMsocsDlg*)m_pDlg)->UpdateData(FALSE);
			if (szTemp.CompareNoCase("bye") == 0 ) 	ShutDown();
		}
		else Close();
	}
	else
	{
		wsprintf (buff, "Error number is %d", GetLastError());
		AfxMessageBox (buff);
	}
 
	CSocket::OnReceive(nErrorCode);
}
 
void CClntSock::OnSend(int nErrorCode) 
{
	CSocket::OnSend(nErrorCode);
}
 
int CClntSock::Receive(void* lpBuf, int nBufLen, int nFlags) 
{
	return CSocket::Receive(lpBuf, nBufLen, nFlags);
}
 
int CClntSock::Send(const void* lpBuf, int nBufLen, int nFlags) 
{
	return CSocket::Send(lpBuf, nBufLen, nFlags);
}

Code:

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
 
// msocsDlg.cpp : implementation file
//
 
#include "stdafx.h"
#include "msocs.h"
 
#include "ClntSock.h"
#include "AsynLstn.h"
#include "AsynSvSk.h"
#include "msocsDlg.h"
 
 
#ifdef _DEBUG
#define new DEBUG_NEW
#undef THIS_FILE
static char THIS_FILE[] = __FILE__;
#endif
 
/////////////////////////////////////////////////////////////////////////////
// CAboutDlg dialog used for App About
 
class CAboutDlg : public CDialog
{
public:
	CAboutDlg();
 
// Dialog Data
	//{{AFX_DATA(CAboutDlg)
	enum { IDD = IDD_ABOUTBOX };
	//}}AFX_DATA
 
	// ClassWizard generated virtual function overrides
	//{{AFX_VIRTUAL(CAboutDlg)
	protected:
	virtual void DoDataExchange(CDataExchange* pDX);    // DDX/DDV support
	//}}AFX_VIRTUAL
 
// Implementation
protected:
	//{{AFX_MSG(CAboutDlg)
	//}}AFX_MSG
	DECLARE_MESSAGE_MAP()
};
 
CAboutDlg::CAboutDlg() : CDialog(CAboutDlg::IDD)
{
	//{{AFX_DATA_INIT(CAboutDlg)
	//}}AFX_DATA_INIT
}
 
void CAboutDlg::DoDataExchange(CDataExchange* pDX)
{
	CDialog::DoDataExchange(pDX);
	//{{AFX_DATA_MAP(CAboutDlg)
	//}}AFX_DATA_MAP
}
 
BEGIN_MESSAGE_MAP(CAboutDlg, CDialog)
	//{{AFX_MSG_MAP(CAboutDlg)
		// No message handlers
	//}}AFX_MSG_MAP
END_MESSAGE_MAP()
 
/////////////////////////////////////////////////////////////////////////////
// CMsocsDlg dialog
 
CMsocsDlg::CMsocsDlg(CWnd* pParent /*=NULL*/)
	: CDialog(CMsocsDlg::IDD, pParent)
{
	//{{AFX_DATA_INIT(CMsocsDlg)
	m_port = 5000;
	m_boolClient = FALSE;
	m_strRecv = _T("");
	m_strServer = _T("");
	m_strSend = _T("");
	m_pClientSock = NULL;
	m_pLstnSock = NULL;
	m_pSrvrSock = NULL;
	//}}AFX_DATA_INIT
	// Note that LoadIcon does not require a subsequent DestroyIcon in Win32
	m_hIcon = AfxGetApp()->LoadIcon(IDR_MAINFRAME);
}
 
void CMsocsDlg::DoDataExchange(CDataExchange* pDX)
{
	CDialog::DoDataExchange(pDX);
	//{{AFX_DATA_MAP(CMsocsDlg)
	DDX_Text(pDX, IDC_PORTNO, m_port);
	DDV_MinMaxUInt(pDX, m_port, 1024, 10000);
	DDX_Text(pDX, IDC_RECEIVE, m_strRecv);
	DDX_Text(pDX, IDC_RSVRNAME, m_strServer);
	DDX_Text(pDX, IDC_SEND, m_strSend);
	//}}AFX_DATA_MAP
}
 
BEGIN_MESSAGE_MAP(CMsocsDlg, CDialog)
	//{{AFX_MSG_MAP(CMsocsDlg)
	ON_WM_SYSCOMMAND()
	ON_WM_PAINT()
	ON_WM_QUERYDRAGICON()
	ON_BN_CLICKED(IDC_SENDBTN, OnSendbtn)
	ON_BN_CLICKED(IDC_CKCLIENT, OnCkclient)
	ON_BN_CLICKED(IDC_CHKSERVER, OnChkserver)
	ON_WM_DESTROY()
	ON_BN_CLICKED(IDC_CLOSESOCK, OnClosesock)
	//}}AFX_MSG_MAP
END_MESSAGE_MAP()
 
/////////////////////////////////////////////////////////////////////////////
// CMsocsDlg message handlers
 
BOOL CMsocsDlg::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
 
	GetDlgItem(IDC_CLOSESOCK)->EnableWindow(FALSE);
 
	// TODO: Add extra initialization here
 
	return TRUE;  // return TRUE  unless you set the focus to a control
}
 
void CMsocsDlg::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 CMsocsDlg::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 CMsocsDlg::OnQueryDragIcon()
{
	return (HCURSOR) m_hIcon;
}
 
void CMsocsDlg::OnSendbtn() 
{
	UpdateData(TRUE);
 
	if (m_strSend.GetLength() == 0) 
	{
		AfxMessageBox ("Please Type the Strings to Send");
		return;
	}
 
	if (m_boolClient)
	{
		if ( m_pClientSock) 
		{
 
			if (m_pClientSock->Send((LPCTSTR)m_strSend, m_strSend.GetLength() +1) == SOCKET_ERROR)
			{
				wsprintf(m_szError, "Failed to send on client socket: %d", m_pClientSock->GetLastError());
				m_pClientSock->Close();
				delete m_pClientSock;
				m_pClientSock = NULL;
				AfxMessageBox (m_szError);
				return;
			}
			m_strSend = "";
			UpdateData(FALSE);
		}
		else
		{
			if ((m_pClientSock = new CClntSock(this)) == NULL) 
			{
				AfxMessageBox ("Failed to allocate client socket! Close and restart app.");
				return;
			}
 
			if (!m_pClientSock->Create())
			{
				wsprintf(m_szError, "Failed to create client socket: %d! Close and restart app.", m_pClientSock->GetLastError());
				AfxMessageBox (m_szError);
				return;
			}
 
			if (!m_pClientSock->Connect(m_strServer, m_port))
			{
				wsprintf(m_szError, "Failed to connect: %d.", m_pClientSock->GetLastError());
				AfxMessageBox (m_szError);
				m_pClientSock->Close();
				delete m_pClientSock;
				m_pClientSock = NULL;
				return;
			}
 
			GetDlgItem(IDC_CLOSESOCK)->EnableWindow(TRUE);
 
			if (m_pClientSock->Send((LPCTSTR)m_strSend, m_strSend.GetLength() +1) == SOCKET_ERROR)
			{
				wsprintf(m_szError, "Failed to send on client socket: %d", m_pClientSock->GetLastError());
				m_pClientSock->Close();
				delete m_pClientSock;
				m_pClientSock = NULL;
				AfxMessageBox (m_szError);
				return;
			}
 
			m_strSend = "";
			UpdateData(FALSE);
		}
	}
	else
	{
		if ( m_pSrvrSock) 
		{
			m_pSrvrSock->m_sendBuffer = m_strSend;
			m_pSrvrSock->m_nBytesSent = 0;
			m_pSrvrSock->m_nBytesBufferSize = m_strSend.GetLength() + 1;
			m_pSrvrSock->DoAsyncSendBuff();
			m_strSend = "";
			UpdateData(FALSE);
		}
		else
		{
			AfxMessageBox ("Message socket not established yet");
		}
	}
}
 
void CMsocsDlg::OnCkclient() 
{
	m_boolClient= TRUE;
	GetDlgItem(IDC_CHKSERVER)->EnableWindow(FALSE);
}
 
void CMsocsDlg::OnChkserver() 
{
	UpdateData(TRUE);
	m_boolClient= FALSE;
	GetDlgItem(IDC_CKCLIENT)->EnableWindow(FALSE);
	GetDlgItem(IDC_RSVRNAME)->EnableWindow(FALSE);
 
	if (m_pLstnSock == NULL) 
	{
		if ((m_pLstnSock = new CAsynlstn(this)) == NULL) 
		{
			AfxMessageBox ("Failed to allocate listen socket! Close and restart app.");
			return;
		}
 
		if (!m_pLstnSock->Create(m_port) )
		{
			wsprintf(m_szError, "Failed to create listen socket: %d! Close and restart app.", m_pLstnSock->GetLastError());
			AfxMessageBox (m_szError);
			return;
		}
 
		if (!m_pLstnSock->Listen())
		{
			wsprintf(m_szError, "Failed to listen: %d! Close and restart app.", m_pLstnSock->GetLastError());
			AfxMessageBox (m_szError);
			return;
		}
 
	}
}
 
 
void CMsocsDlg::OnDestroy() 
{
	CDialog::OnDestroy();
 
	if (m_pLstnSock) delete m_pLstnSock;	
	if (m_pClientSock) delete m_pClientSock;	
	if (m_pSrvrSock) delete m_pSrvrSock;	
}
 
 
void CMsocsDlg::OnClosesock() 
{
	if ( m_boolClient && m_pClientSock)
	{
		m_pClientSock->ShutDown();
		m_pClientSock->Close();
		delete m_pClientSock;
		m_pClientSock = NULL;
		m_strRecv = "";
		m_strSend = "";
		UpdateData(FALSE);
		GetDlgItem(IDC_CLOSESOCK)->EnableWindow(FALSE);
	}
 
	if (!m_boolClient && m_pSrvrSock)
	{
		m_pSrvrSock->ShutDown();
		m_pSrvrSock->Close();
		delete m_pSrvrSock;
		m_pSrvrSock = NULL;
		m_strRecv = "";
		m_strSend = "";
		UpdateData(FALSE);	
		GetDlgItem(IDC_CLOSESOCK)->EnableWindow(FALSE);
	}
}

merci d'avance pour votre aide on ne vous le dira jamais assez:king: