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windows-server-2003/net/tapi/perfdll/tapiperf.c

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/*++ BUILD Version: 0001 // Increment this if a change has global effects
Copyright (c) 1992 Microsoft Corporation
Module Name:
perfTAPI.c
Abstract:
This file implements the Extensible Objects for the TAPI object type
Revision History
--*/
//
// Include Files
//
#include <windows.h>
#include <string.h>
#include <tapi.h>
#include <tspi.h>
#include "client.h"
#include "clntprivate.h"
#include "tapsrv.h"
#include <ntprfctr.h>
#include "perfctr.h"
#include "tapiperf.h"
//
// References to constants which initialize the Object type definitions
//
HINSTANCE ghInst;
HINSTANCE ghTapiInst = NULL;
extern TAPI_DATA_DEFINITION TapiDataDefinition;
DWORD dwOpenCount = 0; // count of "Open" threads
BOOL bInitOK = FALSE; // true = DLL initialized OK
HLINEAPP hLineApp;
HPHONEAPP hPhoneApp;
BOOL bTapiSrvRunning = FALSE;
DWORD gdwLineDevs, gdwPhoneDevs;
void CheckForTapiSrv();
LONG WINAPI Tapi32Performance(PPERFBLOCK);
//
// Tapi data structures
//
HANDLE hTapiSharedMemory; // Handle of Tapi Shared Memory
PPERF_COUNTER_BLOCK pCounterBlock;
typedef LONG (* PERFPROC)(PERFBLOCK *);
#define SZINTERNALPERF TEXT("internalPerformance")
#define SZTAPI32 TEXT("tapi32.dll")
#define SZTAPISRVKEY TEXT("Software\\Microsoft\\Windows\\CurrentVersion\\Telephony")
PERFPROC glpfnInternalPerformance;
//
// Function Prototypes
//
// these are used to insure that the data collection functions
// accessed by Perflib will have the correct calling format.
//
PM_OPEN_PROC OpenTapiPerformanceData;
PM_COLLECT_PROC CollectTapiPerformanceData;
PM_CLOSE_PROC CloseTapiPerformanceData;
//
// Constant structure initializations
// defined in datatapi.h
//
TAPI_DATA_DEFINITION TapiDataDefinition =
{
{
sizeof(TAPI_DATA_DEFINITION) + SIZE_OF_TAPI_PERFORMANCE_DATA,
sizeof(TAPI_DATA_DEFINITION),
sizeof(PERF_OBJECT_TYPE),
TAPIOBJ,
0,
TAPIOBJ,
0,
PERF_DETAIL_NOVICE,
(sizeof(TAPI_DATA_DEFINITION)-sizeof(PERF_OBJECT_TYPE))/
sizeof(PERF_COUNTER_DEFINITION),
0,
-1,
0
},
{
sizeof(PERF_COUNTER_DEFINITION),
LINES,
0,
LINES,
0,
0,
PERF_DETAIL_NOVICE,
PERF_COUNTER_RAWCOUNT,
sizeof(DWORD),
LINES_OFFSET
},
{
sizeof(PERF_COUNTER_DEFINITION),
PHONES,
0,
PHONES,
0,
0,
PERF_DETAIL_NOVICE,
PERF_COUNTER_RAWCOUNT,
sizeof(DWORD),
PHONES_OFFSET
},
{
sizeof(PERF_COUNTER_DEFINITION),
LINESINUSE,
0,
LINESINUSE,
0,
0,
PERF_DETAIL_NOVICE,
PERF_COUNTER_RAWCOUNT,
sizeof(DWORD),
LINESINUSE_OFFSET
},
{
sizeof(PERF_COUNTER_DEFINITION),
PHONESINUSE,
0,
PHONESINUSE,
0,
0,
PERF_DETAIL_NOVICE,
PERF_COUNTER_RAWCOUNT,
sizeof(DWORD),
PHONESINUSE_OFFSET
},
{
sizeof(PERF_COUNTER_DEFINITION),
TOTALOUTGOINGCALLS,
0,
TOTALOUTGOINGCALLS,
0,
0,
PERF_DETAIL_NOVICE,
PERF_COUNTER_COUNTER,
sizeof(DWORD),
TOTALOUTGOINGCALLS_OFFSET
},
{
sizeof(PERF_COUNTER_DEFINITION),
TOTALINCOMINGCALLS,
0,
TOTALINCOMINGCALLS,
0,
0,
PERF_DETAIL_NOVICE,
PERF_COUNTER_COUNTER,
sizeof(DWORD),
TOTALINCOMINGCALLS_OFFSET
},
{
sizeof(PERF_COUNTER_DEFINITION),
CLIENTAPPS,
0,
CLIENTAPPS,
0,
0,
PERF_DETAIL_NOVICE,
PERF_COUNTER_RAWCOUNT,
sizeof(DWORD),
CLIENTAPPS_OFFSET
}
,
{
sizeof(PERF_COUNTER_DEFINITION),
ACTIVEOUTGOINGCALLS,
0,
ACTIVEOUTGOINGCALLS,
0,
0,
PERF_DETAIL_NOVICE,
PERF_COUNTER_RAWCOUNT,
sizeof(DWORD),
ACTIVEOUTGOINGCALLS_OFFSET
},
{
sizeof(PERF_COUNTER_DEFINITION),
ACTIVEINCOMINGCALLS,
0,
ACTIVEINCOMINGCALLS,
0,
0,
PERF_DETAIL_NOVICE,
PERF_COUNTER_RAWCOUNT,
sizeof(DWORD),
ACTIVEINCOMINGCALLS_OFFSET
}
};
DWORD APIENTRY
OpenTapiPerformanceData(
LPWSTR lpDeviceNames
)
/*++
Routine Description:
This routine will open and map the memory used by the TAPI driver to
pass performance data in. This routine also initializes the data
structures used to pass data back to the registry
Arguments:
Pointer to object ID of each device to be opened (TAPI)
Return Value:
None.
--*/
{
LONG status;
TCHAR szMappedObject[] = TEXT("TAPI_COUNTER_BLOCK");
HKEY hKeyDriverPerf;
DWORD size;
DWORD type;
DWORD dwFirstCounter;
DWORD dwFirstHelp;
HKEY hTapiKey;
DWORD dwType;
DWORD dwSize;
//
// Since SCREG is multi-threaded and will call this routine in
// order to service remote performance queries, this library
// must keep track of how many times it has been opened (i.e.
// how many threads have accessed it). the registry routines will
// limit access to the initialization routine to only one thread
// at a time so synchronization (i.e. reentrancy) should not be
// a problem
//
if (!dwOpenCount)
{
// get counter and help index base values
// update static data structures by adding base to
// offset value in structure.
// these values are from <ntprfctr.h>
dwFirstCounter = TAPI_FIRST_COUNTER_INDEX;
dwFirstHelp = TAPI_FIRST_HELP_INDEX;
TapiDataDefinition.TapiObjectType.ObjectNameTitleIndex += dwFirstCounter;
TapiDataDefinition.TapiObjectType.ObjectHelpTitleIndex += dwFirstHelp;
TapiDataDefinition.Lines.CounterNameTitleIndex += dwFirstCounter;
TapiDataDefinition.Lines.CounterHelpTitleIndex += dwFirstHelp;
TapiDataDefinition.Phones.CounterNameTitleIndex += dwFirstCounter;
TapiDataDefinition.Phones.CounterHelpTitleIndex += dwFirstHelp;
TapiDataDefinition.LinesInUse.CounterNameTitleIndex += dwFirstCounter;
TapiDataDefinition.LinesInUse.CounterHelpTitleIndex += dwFirstHelp;
TapiDataDefinition.PhonesInUse.CounterNameTitleIndex += dwFirstCounter;
TapiDataDefinition.PhonesInUse.CounterHelpTitleIndex += dwFirstHelp;
TapiDataDefinition.TotalOutgoingCalls.CounterNameTitleIndex += dwFirstCounter;
TapiDataDefinition.TotalOutgoingCalls.CounterHelpTitleIndex += dwFirstHelp;
TapiDataDefinition.TotalIncomingCalls.CounterNameTitleIndex += dwFirstCounter;
TapiDataDefinition.TotalIncomingCalls.CounterHelpTitleIndex += dwFirstHelp;
TapiDataDefinition.ClientApps.CounterNameTitleIndex += dwFirstCounter;
TapiDataDefinition.ClientApps.CounterHelpTitleIndex += dwFirstHelp;
TapiDataDefinition.CurrentOutgoingCalls.CounterNameTitleIndex += dwFirstCounter;
TapiDataDefinition.CurrentOutgoingCalls.CounterHelpTitleIndex += dwFirstHelp;
TapiDataDefinition.CurrentIncomingCalls.CounterNameTitleIndex += dwFirstCounter;
TapiDataDefinition.CurrentIncomingCalls.CounterHelpTitleIndex += dwFirstHelp;
bInitOK = TRUE; // ok to use this function
}
dwOpenCount++; // increment OPEN counter
// get number of devices from tapi
if (ERROR_SUCCESS != RegOpenKeyEx(HKEY_LOCAL_MACHINE,
SZTAPISRVKEY,
0,
KEY_READ,
&hTapiKey))
{
gdwLineDevs = 0;
gdwPhoneDevs = 0;
}
else
{
dwSize = sizeof(DWORD);
if (ERROR_SUCCESS != RegQueryValueEx(hTapiKey,
TEXT("Perf1"),
NULL,
&dwType,
(LPBYTE)&gdwLineDevs,
&dwSize))
{
gdwLineDevs = 0;
}
else
{
gdwLineDevs -= 'PERF';
}
dwSize = sizeof(DWORD);
if (ERROR_SUCCESS != RegQueryValueEx(hTapiKey,
TEXT("Perf2"),
NULL,
&dwType,
(LPBYTE)&gdwPhoneDevs,
&dwSize))
{
gdwPhoneDevs = 0;
}
else
{
gdwPhoneDevs -= 'PERF';
}
RegCloseKey(hTapiKey);
}
status = ERROR_SUCCESS; // for successful exit
return status;
}
DWORD APIENTRY
CollectTapiPerformanceData(
IN LPWSTR lpValueName,
IN OUT LPVOID *lppData,
IN OUT LPDWORD lpcbTotalBytes,
IN OUT LPDWORD lpNumObjectTypes
)
/*++
Routine Description:
This routine will return the data for the TAPI counters.
Arguments:
IN LPWSTR lpValueName
pointer to a wide character string passed by registry.
IN OUT LPVOID *lppData
IN: pointer to the address of the buffer to receive the completed
PerfDataBlock and subordinate structures. This routine will
append its data to the buffer starting at the point referenced
by *lppData.
OUT: points to the first byte after the data structure added by this
routine. This routine updated the value at lppdata after appending
its data.
IN OUT LPDWORD lpcbTotalBytes
IN: the address of the DWORD that tells the size in bytes of the
buffer referenced by the lppData argument
OUT: the number of bytes added by this routine is written to the
DWORD pointed to by this argument
IN OUT LPDWORD NumObjectTypes
IN: the address of the DWORD to receive the number of objects added
by this routine
OUT: the number of objects added by this routine is written to the
DWORD pointed to by this argument
Return Value:
ERROR_MORE_DATA if buffer passed is too small to hold data
any error conditions encountered are reported to the event log if
event logging is enabled.
ERROR_SUCCESS if success or any other error. Errors, however are
also reported to the event log.
--*/
{
// Variables for reformatting the data
ULONG SpaceNeeded;
PDWORD pdwCounter;
PERF_COUNTER_BLOCK *pPerfCounterBlock;
TAPI_DATA_DEFINITION *pTapiDataDefinition;
// Variables for collecting data about TAPI Resouces
LPWSTR lpFromString;
LPWSTR lpToString;
INT iStringLength;
// variables used for error logging
DWORD dwDataReturn[2];
DWORD dwQueryType;
PPERFBLOCK pPerfBlock;
static BOOL bFirst = TRUE;
//
// before doing anything else, see if Open went OK
//
if (!bInitOK)
{
// unable to continue because open failed.
*lpcbTotalBytes = (DWORD) 0;
*lpNumObjectTypes = (DWORD) 0;
return ERROR_SUCCESS; // yes, this is a successful exit
}
// see if this is a foreign (i.e. non-NT) computer data request
//
dwQueryType = GetQueryType (lpValueName);
if (dwQueryType == QUERY_FOREIGN)
{
// this routine does not service requests for data from
// Non-NT computers
*lpcbTotalBytes = (DWORD) 0;
*lpNumObjectTypes = (DWORD) 0;
return ERROR_SUCCESS;
}
if (dwQueryType == QUERY_ITEMS)
{
if ( !(IsNumberInUnicodeList (TapiDataDefinition.TapiObjectType.ObjectNameTitleIndex, lpValueName)))
{
// request received for data object not provided by this routine
*lpcbTotalBytes = (DWORD) 0;
*lpNumObjectTypes = (DWORD) 0;
return ERROR_SUCCESS;
}
}
pTapiDataDefinition = (TAPI_DATA_DEFINITION *) *lppData;
SpaceNeeded = sizeof(TAPI_DATA_DEFINITION) +
SIZE_OF_TAPI_PERFORMANCE_DATA;
if ( *lpcbTotalBytes < SpaceNeeded )
{
*lpcbTotalBytes = (DWORD) 0;
*lpNumObjectTypes = (DWORD) 0;
return ERROR_MORE_DATA;
}
//
// Copy the (constant, initialized) Object Type and counter definitions
// to the caller's data buffer
//
if (!bTapiSrvRunning)
{
CheckForTapiSrv();
}
pPerfBlock = (PPERFBLOCK)GlobalAlloc(GPTR, sizeof(PERFBLOCK));
if (NULL == pPerfBlock)
{
*lpcbTotalBytes = (DWORD) 0;
*lpNumObjectTypes = (DWORD) 0;
return ERROR_SUCCESS;
}
if (!bTapiSrvRunning)
{
// don't do anything, but succeed
FillMemory(pPerfBlock,
sizeof(PERFBLOCK),
0);
pPerfBlock->dwLines = gdwLineDevs;
pPerfBlock->dwPhones = gdwPhoneDevs;
}
else
{
pPerfBlock->dwSize = sizeof(PERFBLOCK);
glpfnInternalPerformance (pPerfBlock);
// don't count me as a client app!
if (0 != pPerfBlock->dwClientApps)
{
pPerfBlock->dwClientApps--;
}
}
memmove(pTapiDataDefinition,
&TapiDataDefinition,
sizeof(TAPI_DATA_DEFINITION));
//
// Format and collect TAPI data from shared memory
//
pPerfCounterBlock = (PERF_COUNTER_BLOCK *) &pTapiDataDefinition[1];
pPerfCounterBlock->ByteLength = SIZE_OF_TAPI_PERFORMANCE_DATA;
pdwCounter = (PDWORD) (&pPerfCounterBlock[1]);
// make sure we don't have funky values
if (((LONG)pPerfBlock->dwTotalOutgoingCalls) < 0)
{
pPerfBlock->dwTotalOutgoingCalls = 0;
}
if (((LONG)pPerfBlock->dwTotalIncomingCalls) < 0)
{
pPerfBlock->dwTotalIncomingCalls = 0;
}
if (((LONG)pPerfBlock->dwCurrentOutgoingCalls) < 0)
{
pPerfBlock->dwCurrentOutgoingCalls = 0;
}
if (((LONG)pPerfBlock->dwCurrentIncomingCalls) < 0)
{
pPerfBlock->dwCurrentIncomingCalls = 0;
}
*pdwCounter = pPerfBlock->dwLines;
*++pdwCounter = pPerfBlock->dwPhones;
*++pdwCounter = pPerfBlock->dwLinesInUse;
*++pdwCounter = pPerfBlock->dwPhonesInUse;
*++pdwCounter = pPerfBlock->dwTotalOutgoingCalls;
*++pdwCounter = pPerfBlock->dwTotalIncomingCalls;
*++pdwCounter = pPerfBlock->dwClientApps;
*++pdwCounter = pPerfBlock->dwCurrentOutgoingCalls;
*++pdwCounter = pPerfBlock->dwCurrentIncomingCalls;
*lppData = (PVOID) ++pdwCounter;
// update arguments for return
*lpNumObjectTypes = 1;
*lpcbTotalBytes = (DWORD)
((PBYTE) pdwCounter - (PBYTE) pTapiDataDefinition);
GlobalFree(pPerfBlock);
bFirst = FALSE;
return ERROR_SUCCESS;
}
DWORD APIENTRY
CloseTapiPerformanceData(
)
/*++
Routine Description:
This routine closes the open handles to TAPI device performance counters
Arguments:
None.
Return Value:
ERROR_SUCCESS
--*/
{
return ERROR_SUCCESS;
}
void CALLBACK LineCallbackFunc(DWORD dw1,
DWORD dw2,
DWORD dw3,
DWORD dw4,
DWORD dw5,
DWORD dw6)
{
}
//////////////////////////////////////////////////////////////////////
//
// PERF UTILITY STUFF BELOW!
//
//////////////////////////////////////////////////////////////////////
#define INITIAL_SIZE 1024L
#define EXTEND_SIZE 1024L
//
// Global data definitions.
//
ULONG ulInfoBufferSize = 0;
// initialized in Open... routines
DWORD dwLogUsers = 0; // count of functions using event log
WCHAR GLOBAL_STRING[] = L"Global";
WCHAR FOREIGN_STRING[] = L"Foreign";
WCHAR COSTLY_STRING[] = L"Costly";
WCHAR NULL_STRING[] = L"\0"; // pointer to null string
// test for delimiter, end of line and non-digit characters
// used by IsNumberInUnicodeList routine
//
#define DIGIT 1
#define DELIMITER 2
#define INVALID 3
#define EvalThisChar(c,d) ( \
(c == d) ? DELIMITER : \
(c == 0) ? DELIMITER : \
(c < (WCHAR)'0') ? INVALID : \
(c > (WCHAR)'9') ? INVALID : \
DIGIT)
DWORD
GetQueryType (
IN LPWSTR lpValue
)
/*++
GetQueryType
returns the type of query described in the lpValue string so that
the appropriate processing method may be used
Arguments
IN lpValue
string passed to PerfRegQuery Value for processing
Return Value
QUERY_GLOBAL
if lpValue == 0 (null pointer)
lpValue == pointer to Null string
lpValue == pointer to "Global" string
QUERY_FOREIGN
if lpValue == pointer to "Foreign" string
QUERY_COSTLY
if lpValue == pointer to "Costly" string
otherwise:
QUERY_ITEMS
--*/
{
WCHAR *pwcArgChar, *pwcTypeChar;
BOOL bFound;
if (lpValue == 0) {
return QUERY_GLOBAL;
} else if (*lpValue == 0) {
return QUERY_GLOBAL;
}
// check for "Global" request
pwcArgChar = lpValue;
pwcTypeChar = GLOBAL_STRING;
bFound = TRUE; // assume found until contradicted
// check to the length of the shortest string
while ((*pwcArgChar != 0) && (*pwcTypeChar != 0)) {
if (*pwcArgChar++ != *pwcTypeChar++) {
bFound = FALSE; // no match
break; // bail out now
}
}
if (bFound) return QUERY_GLOBAL;
// check for "Foreign" request
pwcArgChar = lpValue;
pwcTypeChar = FOREIGN_STRING;
bFound = TRUE; // assume found until contradicted
// check to the length of the shortest string
while ((*pwcArgChar != 0) && (*pwcTypeChar != 0)) {
if (*pwcArgChar++ != *pwcTypeChar++) {
bFound = FALSE; // no match
break; // bail out now
}
}
if (bFound) return QUERY_FOREIGN;
// check for "Costly" request
pwcArgChar = lpValue;
pwcTypeChar = COSTLY_STRING;
bFound = TRUE; // assume found until contradicted
// check to the length of the shortest string
while ((*pwcArgChar != 0) && (*pwcTypeChar != 0)) {
if (*pwcArgChar++ != *pwcTypeChar++) {
bFound = FALSE; // no match
break; // bail out now
}
}
if (bFound) return QUERY_COSTLY;
// if not Global and not Foreign and not Costly,
// then it must be an item list
return QUERY_ITEMS;
}
BOOL
IsNumberInUnicodeList (
IN DWORD dwNumber,
IN LPWSTR lpwszUnicodeList
)
/*++
IsNumberInUnicodeList
Arguments:
IN dwNumber
DWORD number to find in list
IN lpwszUnicodeList
Null terminated, Space delimited list of decimal numbers
Return Value:
TRUE:
dwNumber was found in the list of unicode number strings
FALSE:
dwNumber was not found in the list.
--*/
{
DWORD dwThisNumber;
WCHAR *pwcThisChar;
BOOL bValidNumber;
BOOL bNewItem;
BOOL bReturnValue;
WCHAR wcDelimiter; // could be an argument to be more flexible
if (lpwszUnicodeList == 0) return FALSE; // null pointer, # not found
pwcThisChar = lpwszUnicodeList;
dwThisNumber = 0;
wcDelimiter = (WCHAR)' ';
bValidNumber = FALSE;
bNewItem = TRUE;
while (TRUE) {
switch (EvalThisChar (*pwcThisChar, wcDelimiter)) {
case DIGIT:
// if this is the first digit after a delimiter, then
// set flags to start computing the new number
if (bNewItem) {
bNewItem = FALSE;
bValidNumber = TRUE;
}
if (bValidNumber) {
dwThisNumber *= 10;
dwThisNumber += (*pwcThisChar - (WCHAR)'0');
}
break;
case DELIMITER:
// a delimiter is either the delimiter character or the
// end of the string ('\0') if when the delimiter has been
// reached a valid number was found, then compare it to the
// number from the argument list. if this is the end of the
// string and no match was found, then return.
//
if (bValidNumber) {
if (dwThisNumber == dwNumber) return TRUE;
bValidNumber = FALSE;
}
if (*pwcThisChar == 0) {
return FALSE;
} else {
bNewItem = TRUE;
dwThisNumber = 0;
}
break;
case INVALID:
// if an invalid character was encountered, ignore all
// characters up to the next delimiter and then start fresh.
// the invalid number is not compared.
bValidNumber = FALSE;
break;
default:
break;
}
pwcThisChar++;
}
} // IsNumberInUnicodeList
BOOL
WINAPI
DllEntryPoint(
HANDLE hDLL,
DWORD dwReason,
LPVOID lpReserved
)
{
switch (dwReason)
{
case DLL_PROCESS_ATTACH:
{
ghInst = hDLL;
break;
}
case DLL_PROCESS_DETACH:
{
break;
}
case DLL_THREAD_ATTACH:
break;
case DLL_THREAD_DETACH:
{
break;
}
} // switch
return TRUE;
}
void CheckForTapiSrv()
{
SC_HANDLE sc, scTapiSrv;
SERVICE_STATUS ServStat;
sc = OpenSCManager (NULL, NULL, GENERIC_READ);
if (NULL == sc)
{
return;
}
bTapiSrvRunning = FALSE;
scTapiSrv = OpenService (sc, "TAPISRV", SERVICE_QUERY_STATUS);
if (!QueryServiceStatus (scTapiSrv, &ServStat))
{
}
if (ServStat.dwCurrentState != SERVICE_RUNNING)
{
}
else
{
bTapiSrvRunning = TRUE;
}
if (bTapiSrvRunning)
{
if (!ghTapiInst)
{
ghTapiInst = LoadLibrary (SZTAPI32);
glpfnInternalPerformance = (PERFPROC)GetProcAddress(
ghTapiInst,
SZINTERNALPERF
);
if (!glpfnInternalPerformance)
{
}
}
}
CloseServiceHandle(scTapiSrv);
CloseServiceHandle(sc);
}