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//+---------------------------------------------------------------------------
//
// Microsoft Windows
// Copyright (C) Microsoft Corporation, 1992 - 1995.
//
// File: spyclnt.cxx
//
// Contents: Funktionality for OleSpy client.
//
// Classes:
//
// Functions:
//
// History: 8-16-95 JohannP (Johann Posch) Created
//
//----------------------------------------------------------------------------
#include <ole2int.h>
#pragma hdrstop
#if DBG==1
#include <string.h>
#include <stdio.h>
#include <stdlib.h>
#include "SpyClnt.hxx"
#define APPMAXLEN 512
static HANDLE hPipe; // File or Pipe handle.
static OVERLAPPED OverLapWrt; // Overlapped structure
static HANDLE hEventWrt; // Event handle for overlapped writes.
#undef wsprintf
#undef wsprintfA
#define wsprintf wsprintfA
#undef MessageBoxA
#undef MessageBox
#define MessageBox MessageBoxA
#undef CreateFileA
#undef CreateFile
#define CreateFile CreateFileA
#define GetModuleName GetModuleNameA
LPSTR GetAppName();
//+---------------------------------------------------------------------------
//
// Function: GetAppName
//
// Synopsis:
//
// Arguments: (none)
//
// Returns:
//
// History: 8-16-95 JohannP (Johann Posch) Created
//
// Notes:
//
//----------------------------------------------------------------------------
LPSTR GetAppName()
{
static CHAR szAppName[APPMAXLEN];
LPSTR psz, psz1;
GetModuleFileNameA(NULL, szAppName, APPMAXLEN);
psz = strrchr(szAppName, '\\');
psz++;
psz1 = strchr(psz,'.');
*psz1 = '\0';
return psz;
}
//+---------------------------------------------------------------------------
//
// Function: SendEntry
//
// Synopsis:
//
// Arguments: [szOutBuf] --
//
// Returns:
//
// History: 9-29-95 JohannP (Johann Posch) Created
//
// Notes:
//
//----------------------------------------------------------------------------
int SendEntry(char * szOutBuf)
{
DWORD dwRet;
char szSendBuf[OUT_BUF_SIZE] = "";
DWORD cbWritten;
wsprintf (szSendBuf, "%s: %s\n", GetAppName(), szOutBuf);
dwRet = WriteFile (hPipe, szSendBuf, strlen(szSendBuf), &cbWritten, &OverLapWrt);
if (!dwRet)
{
DWORD dwLastError;
dwLastError = GetLastError();
// If Error = IO_PENDING, wait until the event signals success.
if (dwLastError == ERROR_IO_PENDING)
{
WaitForSingleObject (hEventWrt, (DWORD)-1);
}
}
return 0;
}
//+---------------------------------------------------------------------------
//
// Function: InitClient
//
// Synopsis:
//
// Arguments: [pszShrName] --
//
// Returns:
//
// History: 9-29-95 JohannP (Johann Posch) Created
//
// Notes:
//
//----------------------------------------------------------------------------
int InitClient(char *pszShrName)
{
CHAR szSendBuf[OUT_BUF_SIZE] = "";
CHAR szFileName[LINE_LEN+NAME_SIZE+2];
DWORD dwRet;
DWORD dwLastError;
DWORD dwThreadID;
DWORD cbWritten;
if (pszShrName == NULL)
{
return -1;
}
// Construct file/pipe name.
wsprintf (szFileName, "%s%s%s", "\\\\", pszShrName, "\\PIPE\\OleSpy");
// CreateFile() to connect to the named pipe. Generic access, read/write.
hPipe = CreateFile(szFileName, GENERIC_WRITE | GENERIC_READ,
FILE_SHARE_READ | FILE_SHARE_WRITE ,
NULL, OPEN_EXISTING, FILE_FLAG_OVERLAPPED, NULL);
// Do some error checking.
if ((DWORD)hPipe == 0xFFFFFFFF)
{
dwRet = GetLastError();
// This error means pipe wasn't found.
if ((dwRet == ERROR_SEEK_ON_DEVICE) || (dwRet == ERROR_FILE_NOT_FOUND))
{
MessageBox(NULL,"CANNOT FIND PIPE: Assure OleSpy is started on server.",
"", MB_OK);
}
else
{
CHAR szErrorBuf[LINE_LEN] = "";
// Flagging unknown errors.
wsprintf (szErrorBuf,"CreateFile() on pipe failed, see winerror.h error #%d.",dwRet);
MessageBox (NULL, szErrorBuf, "", MB_ICONINFORMATION | MB_OK | MB_APPLMODAL);
}
return -1;
}
// Create and init overlapped structure for writes.
hEventWrt = CreateEvent (NULL, TRUE, FALSE, NULL);
OverLapWrt.hEvent = hEventWrt;
{
LPSTR szStr = GetAppName();
// Write the client name to server.
dwRet = WriteFile(hPipe, szStr, strlen(szStr), &cbWritten, &OverLapWrt);
}
if (!dwRet)
{
dwLastError = GetLastError();
// Wait on overlapped if need be.
if (dwLastError == ERROR_IO_PENDING)
{
WaitForSingleObject(hEventWrt, (DWORD)-1);
}
}
// Create a thread to read the pipe.
CreateThread (NULL, 0, (LPTHREAD_START_ROUTINE)ReadPipe,
(LPVOID)&hPipe, 0, &dwThreadID);
return 0;
}
//+---------------------------------------------------------------------------
//
// Function: UninitClient
//
// Synopsis:
//
// Arguments: (none)
//
// Returns:
//
// History: 9-29-95 JohannP (Johann Posch) Created
//
// Notes:
//
//----------------------------------------------------------------------------
void UninitClient()
{
CloseHandle (hPipe);
CloseHandle (hEventWrt);
}
//+---------------------------------------------------------------------------
//
// Function: ReadPipe
//
// Synopsis:
//
// Arguments: [hPipe] --
//
// Returns:
//
// History: 9-29-95 JohannP (Johann Posch) Created
//
// Notes:
//
//----------------------------------------------------------------------------
VOID ReadPipe (HANDLE *hPipe)
{
CHAR inBuf[IN_BUF_SIZE] = "";// Input buffer.
DWORD bytesRead; // Used for ReadFile()
DWORD dwRet; // Used to trap return codes.
DWORD dwLastError; // Used to trap returns from GetLastError.
HANDLE hEventRd; // Event handle for overlapped reads.
OVERLAPPED OverLapRd; // Overlapped structure.
DWORD bytesTrans; // Bytes transferred in read.
// Create and init overlap structure.
hEventRd = CreateEvent (NULL, TRUE, FALSE, NULL);
memset (&OverLapRd, 0, sizeof(OVERLAPPED));
OverLapRd.hEvent = hEventRd;
// Loop, reading the named pipe until it is broken. The ReadFile() uses
// an overlapped structure. When the event handle signals a completed
// read, this loop writes the message to the larger edit field.
do {
dwRet = ReadFile (*hPipe, inBuf, IN_BUF_SIZE, &bytesRead, &OverLapRd);
// Do some error checking.
if (!dwRet)
{
dwLastError = GetLastError();
if (dwLastError == ERROR_IO_PENDING)
{
// If Error = IO_PENDING, wait for event
// handle to signal success.
WaitForSingleObject (hEventRd, (DWORD)-1);
}
else
{
// If pipe is broken, tell user and break.
if (dwLastError == (DWORD)ERROR_BROKEN_PIPE)
{
MessageBox (NULL,
"The connection to this client has been broken.", "", MB_OK);
}
else
{
// Or flag unknown errors, and break.
CHAR szErrorBuf[80];
wsprintf (szErrorBuf,
"ReadFile() on pipe failed, see winerror.h error #%d",GetLastError());
MessageBox (NULL, szErrorBuf, "", MB_OK);
}
break;
}
}
// NULL terminate string.
GetOverlappedResult (*hPipe, &OverLapRd, &bytesTrans, FALSE);
inBuf[bytesTrans] = '\0';
} while(1);
ExitThread(0);
}
#endif // DBG==1
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