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use the following smaple code...Create WIn32 console and paste the server.c in one project and client.c in another win32 copnsole project
// Module Name: Server.c
//
// Description:
// This example illustrates a simple TCP server that accepts
// incoming client connections. Once a client connection is
// established, a thread is spawned to read data from the
// client and echo it back (if the echo option is not
// disabled).
//
// Compile:
// cl -o Server Server.c ws2_32.lib
//
// Command line options:
// server [-p:x] [-i:IP] [-o]
// -p:x Port number to listen on
// -i:str Interface to listen on
// -o Receive only; don't echo the data back
//
#include <winsock2.h>
#include <stdio.h>
#include <stdlib.h>
#define DEFAULT_PORT 5150
#define DEFAULT_BUFFER 4096
int iPort = DEFAULT_PORT; // Port to listen for clients on
BOOL bInterface = FALSE, // Listen on the specified interface
bRecvOnly = FALSE; // Receive data only; don't echo back
char szAddress[128]; // Interface to listen for clients on
//
// Function: usage
//
// Description:
// Print usage information and exit
//
void usage()
{
printf("usage: server [-p:x] [-i:IP] [-o]\n\n");
printf(" -p:x Port number to listen on\n");
printf(" -i:str Interface to listen on\n");
printf(" -o Don't echo the data back\n\n");
ExitProcess(1);
}
//
// Function: ValidateArgs
//
// Description:
// Parse the command line arguments, and set some global flags
// to indicate what actions to perform
//
void ValidateArgs(int argc, char **argv)
{
int i;
for(i = 1; i < argc; i++)
{
if ((argv[i][0] == '-') || (argv[i][0] == '/'))
{
switch (tolower(argv[i][1]))
{
case 'p':
iPort = atoi(&argv[i][3]);
break;
case 'i':
bInterface = TRUE;
if (strlen(argv[i]) > 3)
strcpy(szAddress, &argv[i][3]);
break;
case 'o':
bRecvOnly = TRUE;
break;
default:
usage();
break;
}
}
}
}
//
// Function: ClientThread
//
// Description:
// This function is called as a thread, and it handles a given
// client connection. The parameter passed in is the socket
// handle returned from an accept() call. This function reads
// data from the client and writes it back.
//
DWORD WINAPI ClientThread(LPVOID lpParam)
{
SOCKET sock=(SOCKET)lpParam;
char szBuff[DEFAULT_BUFFER];
int ret,
nLeft,
idx;
while(1)
{
// Perform a blocking recv() call
//
ret = recv(sock, szBuff, DEFAULT_BUFFER, 0);
if (ret == 0) // Graceful close
break;
else if (ret == SOCKET_ERROR)
{
printf("recv() failed: %d\n", WSAGetLastError());
break;
}
szBuff[ret] = '\0';
printf("RECV: '%s'\n", szBuff);
//
// If we selected to echo the data back, do it
//
if (!bRecvOnly)
{
nLeft = ret;
idx = 0;
//
// Make sure we write all the data
//
while(nLeft > 0)
{
ret = send(sock, &szBuff[idx], nLeft, 0);
if (ret == 0)
break;
else if (ret == SOCKET_ERROR)
{
printf("send() failed: %d\n",
WSAGetLastError());
break;
}
nLeft -= ret;
idx += ret;
}
}
}
return 0;
}
//
// Function: main
//
// Description:
// Main thread of execution. Initialize Winsock, parse the
// command line arguments, create the listening socket, bind
// to the local address, and wait for client connections.
//
int main(int argc, char **argv)
{
WSADATA wsd;
SOCKET sListen,
sClient;
int iAddrSize;
HANDLE hThread;
DWORD dwThreadId;
struct sockaddr_in local,
client;
ValidateArgs(argc, argv);
if (WSAStartup(MAKEWORD(2,2), &wsd) != 0)
{
printf("Failed to load Winsock!\n");
return 1;
}
// Create our listening socket
//
sListen = socket(AF_INET, SOCK_STREAM, IPPROTO_IP);
if (sListen == SOCKET_ERROR)
{
printf("socket() failed: %d\n", WSAGetLastError());
return 1;
}
// Select the local interface, and bind to it
//
if (bInterface)
{
local.sin_addr.s_addr = inet_addr(szAddress);
if (local.sin_addr.s_addr == INADDR_NONE)
usage();
}
else
local.sin_addr.s_addr = htonl(INADDR_ANY);
local.sin_family = AF_INET;
local.sin_port = htons(iPort);
if (bind(sListen, (struct sockaddr *)&local,
sizeof(local)) == SOCKET_ERROR)
{
printf("bind() failed: %d\n", WSAGetLastError());
return 1;
}
listen(sListen, 8);
//
// In a continuous loop, wait for incoming clients. Once one
// is detected, create a thread and pass the handle off to it.
//
while (1)
{
iAddrSize = sizeof(client);
sClient = accept(sListen, (struct sockaddr *)&client,
&iAddrSize);
if (sClient == INVALID_SOCKET)
{
printf("accept() failed: %d\n", WSAGetLastError());
break;
}
printf("Accepted client: %s:%d\n",
inet_ntoa(client.sin_addr), ntohs(client.sin_port));
hThread = CreateThread(NULL, 0, ClientThread,
(LPVOID)sClient, 0, &dwThreadId);
if (hThread == NULL)
{
printf("CreateThread() failed: %d\n", GetLastError());
break;
}
CloseHandle(hThread);
}
closesocket(sListen);
WSACleanup();
return 0;
}
--------------------------------------------------------------------------
//Now paste Client.c in Another Project
// Module Name: Client.c
//
// Description:
// This sample is the echo client. It connects to the TCP server,
// sends data, and reads data back from the server.
//
// Compile:
// cl -o Client Client.c ws2_32.lib
//
// Command Line Options:
// client [-p:x] [-s:IP] [-n:x] [-o]
// -p:x Remote port to send to
// -s:IP Server's IP address or host name
// -n:x Number of times to send message
// -o Send messages only; don't receive
//
#include <winsock2.h>
#include <stdio.h>
#include <stdlib.h>
#define DEFAULT_COUNT 20
#define DEFAULT_PORT 5150
#define DEFAULT_BUFFER 2048
#define DEFAULT_MESSAGE "This is a test of the emergency \
broadcasting system"
char szServer[128], // Server to connect to
szMessage[1024]; // Message to send to sever
int iPort = DEFAULT_PORT; // Port on server to connect to
DWORD dwCount = DEFAULT_COUNT; // Number of times to send message
BOOL bSendOnly = FALSE; // Send data only; don't receive
//
// Function: usage:
//
// Description:
// Print usage information and exit
//
void usage()
{
printf("usage: client [-p:x] [-s:IP] [-n:x] [-o]\n\n");
printf(" -p:x Remote port to send to\n");
printf(" -s:IP Server's IP address or host name\n");
printf(" -n:x Number of times to send message\n");
printf(" -o Send messages only; don't receive\n");
ExitProcess(1);
}
//
// Function: ValidateArgs
//
// Description:
// Parse the command line arguments, and set some global flags
// to indicate what actions to perform
//
void ValidateArgs(int argc, char **argv)
{
int i;
for(i = 1; i < argc; i++)
{
if ((argv[i][0] == '-') || (argv[i][0] == '/'))
{
switch (tolower(argv[i][1]))
{
case 'p': // Remote port
if (strlen(argv[i]) > 3)
iPort = atoi(&argv[i][3]);
break;
case 's': // Server
if (strlen(argv[i]) > 3)
strcpy(szServer, &argv[i][3]);
break;
case 'n': // Number of times to send message
if (strlen(argv[i]) > 3)
dwCount = atol(&argv[i][3]);
break;
case 'o': // Only send message; don't receive
bSendOnly = TRUE;
break;
default:
usage();
break;
}
}
}
}
//
// Function: main
//
// Description:
// Main thread of execution. Initialize Winsock, parse the
// command line arguments, create a socket, connect to the
// server, and then send and receive data
//
int main(int argc, char **argv)
{
WSADATA wsd;
SOCKET sClient;
char szBuffer[DEFAULT_BUFFER];
int ret,
i;
struct sockaddr_in server;
struct hostent *host = NULL;
// Parse the command line, and load Winsock
//
ValidateArgs(argc, argv);
if (WSAStartup(MAKEWORD(2,2), &wsd) != 0)
{
printf("Failed to load Winsock library!\n");
return 1;
}
strcpy(szMessage, DEFAULT_MESSAGE);
//
// Create the socket, and attempt to connect to the server
//
sClient = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP);
if (sClient == INVALID_SOCKET)
{
printf("socket() failed: %d\n", WSAGetLastError());
return 1;
}
server.sin_family = AF_INET;
server.sin_port = htons(iPort);
server.sin_addr.s_addr = inet_addr(szServer);
//
// If the supplied server address wasn't in the form
// "aaa.bbb.ccc.ddd," it's a host name, so try to resolve it
//
if (server.sin_addr.s_addr == INADDR_NONE)
{
host = gethostbyname(szServer);
if (host == NULL)
{
printf("Unable to resolve server: %s\n", szServer);
return 1;
}
CopyMemory(&server.sin_addr, host->h_addr_list[0],
host->h_length);
}
if (connect(sClient, (struct sockaddr *)&server,
sizeof(server)) == SOCKET_ERROR)
{
printf("connect() failed: %d\n", WSAGetLastError());
return 1;
}
// Send and receive data
//
for(i = 0; i < dwCount; i++)
{
ret = send(sClient, szMessage, strlen(szMessage), 0);
if (ret == 0)
break;
else if (ret == SOCKET_ERROR)
{
printf("send() failed: %d\n", WSAGetLastError());
break;
}
printf("Send %d bytes\n", ret);
if (!bSendOnly)
{
ret = recv(sClient, szBuffer, DEFAULT_BUFFER, 0);
if (ret == 0) // Graceful close
break;
else if (ret == SOCKET_ERROR)
{
printf("recv() failed: %d\n", WSAGetLastError());
break;
}
szBuffer[ret] = '\0';
printf("RECV [%d bytes]: '%s'\n", ret, szBuffer);
}
}
closesocket(sClient);
WSACleanup();
return 0;
}
--------------------------------------------------------------------------
How to Run them
for server usage is
server -p:5150 -o
and for client the usage is
client -p:5150 -s:IP -n:10 -o
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thanks for the reply. One question what headers are needed for the includes? you didn't turn the <> function on in your post so it wiped out the includes.
Thanks again,
Win32newb
"Making windows programs worse than they already are"
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Can any body tell me how to completely automate the build of a vc++ project from command line.I want to export makefiles automatically and build it.It's urgent.
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Can nobody answer me?Is it because it's a dumb question?I'm a fresher.I would be grate ful to you,if anybody helps me.
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This article[^] in the MSDN describes the command line switches for VS.NET 2002/2003. You can use these to build projects or whole solutions from the command line or in a batch file.
If you are still using Visual C++ 6.0, there are similar command line options for it; you'll need to check the help text.
Software Zen: delete this;
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Hi,
I am new in MFC window based application.
I have created a SDI project(based on document view architecture) using MFC wizard. I want to remove menu bar and title bar completely. How can I do that?
Advance thanks for support.
Shoma
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In the dialog design view, right click on the dialog and select properties, there are checkbox where you can remove the titlebar.
MSN Messenger.
prakashnadar@msn.com
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Hello,
That chap is asking about SDI Application and not Dialog based application...dont confuse him....
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Sorry for the wrong answer before here what you need to do, in the mainframe window, add the virtual funtion for PreCreateWindow(..) if it is already there then in that method the paramter CREATESTRUCT has a member variable called dwExStyle. if you modify the style here you will get the corresponding style of your window.
MSN Messenger.
prakashnadar@msn.com
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BOOL CMainFrame::PreCreateWindow(CREATESTRUCT& cs)
{
cs.style = WS_DLGFRAME | ~WS_BORDER | WS_OVERLAPPED ;
cs.hMenu = NULL;
// Create a window without min/max buttons or sizable border
// cs.style = WS_OVERLAPPED ;
return CFrameWnd::PreCreateWindow(cs);
}
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Balkrishna Talele wrote:
cs.style = WS_DLGFRAME | ~WS_BORDER | WS_OVERLAPPED ;
most of the bits will be set.
MSN Messenger.
prakashnadar@msn.com
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I am using MFC and am having a bit of a problem with accessing a control in a generic class I created. I am using FormView as it has both dialog and menus in it. This may be a simple problem, but I am still new to MFC and I can't seem to figure it out.
I created a formview class with an edit box, then subclassed the edit box so I could trap the enter key. Now, I need to access a list box on the form from a generic class that I created. I know I need to create a pointer to the formview class, but I am unsure as to how to do this or how to access the list box control variable. I tried using getparent() as in:
(CFormView*)GetParentOwner()->GetDlgItemText(IDD_ITEMSLIST, model);
and could not access the control. I get errors saying the control is an undeclared variable. Any help or a web site that explains this would be greatly appreciated.
Roger
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MFC creates automatic class hiearchies, and has a set of functions that allow you to traverse and manipuate the hiearchy.
Consider the following example:
1. An application object is created
2. The application object creates and initializes it's main window (usually a frame window), and saves this into m_pMainWnd pointer on the CWinApp-class
3. The frame window, if it is an SDI frame, first creates a set of possible bars (toolbar, statusbar, menubar, rebar etc). Then it creates the view context, and places itself as a parent of the view.
This having said, you can find the form view class object by asking the frame window to enumerate through it's child windows. Alternatively, you can use GetDlgCtrl with the ID of the child window (by default, AFX_IDW_PANE_FIRST, unless you have given it a different ID while creating it). Here is what MSDN says about the function call:
You can use the GetDlgItem function with any parent-child window pair, not just with dialog boxes. As long as the hDlg parameter specifies a parent window and the child window has a unique identifier (as specified by the hMenu parameter in the CreateWindow or CreateWindowEx function that created the child window), GetDlgItem returns a valid handle to the child window
As you can see, the MFC implementation of this function always returns a CWnd* to the requested object. Now, when you ask for the view class pointer, you can cast it down from CWnd* to CFormView*. Again, by using this pointer, you can use GetDlgCtrl to request for a pointer into the CListCtrl object.
The reason why your code call fails is that although the form view is a child of the frame window, the list box control is NOT. It is the child of the form view. You need to use a pointer to the form view class instance if you wish to request for the listbox.
-Antti Keskinen
----------------------------------------------
The definition of impossible is strictly dependant
on what we think is possible.
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I don't suppose you could show me how to do this. I tried using CFormView* pDiag = (CFormView*)GetParentView()->GetDlgItem(IDC_DATA),
but it still does not give me access to my ListBox and I cannot insert data into it since I cannot access the control variable on my viewform. I know I am being a bit dense here, but this is still new to me. If I was dealing with just a console based Application I probably would not have as much trouble, but I don't really know how to do this in MFC and the explanations I have read so far have not really shed any light on how I need to do this other than I now know I need to create a pointer which is what I am having trouble with at the moment.
Roger
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Hello Friends !!
i am developing a sdi application..on that i am using two CListView Classes and swithching between them when needed ..
i want to display a dialog box while one of the two view is selected ..i don't know where to write the code .. i tried using OnviewActivate handler it's not working ..so if any body knows pls help to which handler to choose ,, and also
pls explain me in which order message handlers are called ..
Thanks in advance
"The thought that Guids ur intelligence in more important than how intelligent u r  "
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Hello !
First I need to ask you the simplest of all questions: what do you use to switch between the views ? If it is a button or anything that accepts messages, write a handler for it and create/show a modeless dialog box when a click on this item designates that the "view with the dialog" should be shown. When a click on the item occurs that says "show the other view", you command the modeless dialog to either hide itself or destroy it.
The message order is dependant on the phase of your window object. Usually, different events on the Windows OS can be grouped by the messages sent. The only reasonable way to track the message order on a window is to use Microsoft Spy++, or a similar message hooking program.
-Antti Keskinen
----------------------------------------------
The definition of impossible is strictly dependant
on what we think is possible.
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Thanks a Lot i got it
"The thought that Guids ur intelligence in more important than how intelligent u r "
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Can anybody tell me how can i call the member function of one class through the other class using Send/Post Message?
Vidya
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2 ways that I am aware of.
1 make the member function static and call it as CMYCLASS::Memberfunction(...) on the message handler for the posted message.
2. In the message paramneter cast the this pointer ta a long and pass it with the message. Cast it back to the class in the message handler. I think this breaks some of the concepts of proper OO
tcss
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Hello,
In stdafx.h put the following stuff
#define WM_TALELE_CLICK 3000
..
..
..
---------------------------------------------------------------------------
then in XYZ.CPP put following stuff
.
GetParent()->PostMessage(WM_TALELE_CLICK,m_id,0); //e.g m_id is paramater to be passed
.
.
.
---------------------------------------------------------------------------
Implementation.h
void OnTaleleBtnClick(WPARAM wp, LPARAM lp);
---------------------------------------------------------------------------
then in Implementation.cpp
BEGIN_MESSAGE_MAP(CIMP, CXyz)
ON_MESSAGE(WM_STATICBTN_CLICK, OnTaleleBtnClick)
END_MESSAGE_MAP()
void CIMPL::OnTaleleBtnClick(WPARAM wp, LPARAM lp) //wp ==m_nID
{
switch(wp)
{
case NEWS_BTN:
::MessageBox(0,"Newsx btn","News",0); break;
case ALERT_BTN:
::MessageBox(0,"Alert btn","News",0); break;
default : break;
}
}
---------------------------------------------------------------------------
you are done..... I had actually implemented...and executed successfully, dear vidya
regards
Balkrishna Talele
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Technically, you can't use SendMessage() or PostMessage() to call functions. The message handler can, however.
#define PM_STARTPROC 123
BEGIN_MESSAGE_MAP(CMyDialog, CDialog)
ON_MESSAGE(PM_STARTPROC, OnStart)
END_MESSAGE_MAP()
BOOL CMyDialog::OnInitDialog()
{
CDialog::OnInitDialog();
PostMessage(PM_STARTPROC);
return TRUE;
}
LRESULT CMyDialog::OnStart( WPARAM wParam, LPARAM lParam )
{
return (0);
}
"The pointy end goes in the other man." - Antonio Banderas (Zorro, 1998)
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Hey
I have an icon. I would like to insert the icon into a toolbar.How to do?
Thanks
JP
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Insert an icon means to insert a new toolbar button if so use TB_INSERTBUTTON message to do it.
MSN Messenger.
prakashnadar@msn.com
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Use...
TB_INSERTBUTTON
AddButton(...);
which has following paramater
HRESULT AddButtons(
int nButtons, // number of buttons
LPMMCBUTTON lpButtons // pointer to an MMCBUTTON structure
);
LPMMCBUTTON .....
typedef struct _MMCBUTTON
{
int nBitmap ;
int idCommand;
BYTE fsState;
BYTE fsType;
LPOLESTR lpButtonText;
LPOLESTR lpTooltipText;
} MMCBUTTON;
typedef MMCBUTTON* LPMMCBUTTON;
regards
Balkrishna Talele
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access violation 0xC0000005 when calling func in dll
hi,guys:
ask for your kind help. thanks in advance.
typedef int (WINAPI * _DLL_FOO)(int, char **, int, char **, LPDCL, LPUSERFUNCTIONS);
......
_DLL_FOO m_PFoo;
......
LoadLibrary successfully。
m_PFoo = (_DLL_FOO)GetProcAddress(m_hDll, "Foo"); //successfully
326: retval = (*m_PFoo)(infc, infv, exfc, exfv, m_lpDCL, m_lpUserFunctions);
004440D2 mov esi,esp
004440D4 mov eax,dword ptr [ebp-4]
004440D7 mov ecx,dword ptr [eax+0B8h]
004440DD push ecx
004440DE mov edx,dword ptr [ebp-4]
004440E1 mov eax,dword ptr [edx+0BCh]
004440E7 push eax
004440E8 mov ecx,dword ptr [ebp-10h]
004440EB push ecx
004440EC mov edx,dword ptr [ebp-8]
004440EF push edx
004440F0 mov eax,dword ptr [ebp-14h]
004440F3 push eax
004440F4 mov ecx,dword ptr [ebp-0Ch]
004440F7 push ecx
004440F8 mov edx,dword ptr [ebp-4]
004440FB call dword ptr [edx+0B0h] <== here access violation 0xC0000005
00444101 cmp esi,esp
00444103 call __chkesp (00451fa0)
00444108 mov dword ptr [ebp-11Ch],eax
327：
when failure edx+0B0h ＝＝ 0x009796b0
009796b0：B0 D4 11 02 CD CD CD CD 38 7B 14 00 78 A4 14 00 00 00 11 02 CD CD CD CD 38 7B 14 00 78 A4 14 00
The address of func m_PFoo is 0x0211D4B0, it's all right.
What 's the problem with my program and how to fix it ?
Thank you very much !
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