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windows-server-2003/enduser/netmeeting/av/callcont/hcall.cpp

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/****************************************************************************
*
* $Archive: S:/STURGEON/SRC/Q931/VCS/hcall.cpv $
*
* INTEL Corporation Prorietary Information
*
* This listing is supplied under the terms of a license agreement
* with INTEL Corporation and may not be copied nor disclosed except
* in accordance with the terms of that agreement.
*
* Copyright (c) 1993-1996 Intel Corporation.
*
* $Revision: 2.7 $
* $Date: 28 Jan 1997 11:17:52 $
* $Author: jdashevx $
*
* Deliverable:
*
* Abstract:
*
*
* Notes:
*
***************************************************************************/
#pragma warning ( disable : 4100 4115 4201 4214 4514 4702 4710 )
#include "precomp.h"
#include <string.h>
#include <time.h>
#include "h225asn.h"
#include "isrg.h"
#include "common.h"
#include "q931.h"
#include "hcall.h"
#include "utils.h"
#include "tstable.h"
#ifdef UNICODE_TRACE
// We include this header to fix problems with macro expansion when Unicode is turned on.
#include "unifix.h"
#endif
// variable needed to support ISR debug facility.
#if defined(_DEBUG)
extern WORD ghISRInst;
#endif
static BOOL bCallListCreated = FALSE;
// Pointer to our global table. Note that this table replaces the previous
// linked-list implementation.
TSTable<CALL_OBJECT>* gpCallObjectTable = NULL;
// Our call back function for enumerating the table when we want to tear down
// all existing calls
DWORD Q931HangUpAllCalls(P_CALL_OBJECT pCallObject, LPVOID context);
// Our call back function for determining if a timer has expired
DWORD Q931CheckForTimeout(P_CALL_OBJECT pCallObject, LPVOID context);
// Our call back function for determining if a timer has expired
DWORD Q931CallObjectFind(P_CALL_OBJECT pCallObject, LPVOID context);
static struct
{
WORD wCRV; // Call Reference Value (0..7FFF).
CRITICAL_SECTION Lock;
} CRVSource;
static struct
{
BOOL bBusy;
DWORD dwTimerCount;
DWORD dwTicks301;
DWORD dwTicks303;
UINT_PTR uTimerId;
CRITICAL_SECTION Lock;
} Q931GlobalTimer = {0};
typedef struct
{
BOOL bFound;
WORD wCRV;
PCC_ADDR pPeerAddr;
HQ931CALL hQ931Call;
} Q931CALLOBJKEY, *PQ931CALLOBJKEY;
//====================================================================================
//
// PRIVATE FUNCTIONS
//
//====================================================================================
//====================================================================================
//====================================================================================
CS_STATUS
Q931CRVNew(
WORD *pwCRV)
{
EnterCriticalSection(&(CRVSource.Lock));
CRVSource.wCRV = (WORD)((CRVSource.wCRV + 1) & 0x7fff);
if (CRVSource.wCRV == 0)
{
CRVSource.wCRV = 1;
}
*pwCRV = CRVSource.wCRV;
LeaveCriticalSection(&(CRVSource.Lock));
return CS_OK;
}
//====================================================================================
//
// PUBLIC FUNCTIONS
//
//====================================================================================
//====================================================================================
//====================================================================================
CS_STATUS
CallListCreate()
{
if (bCallListCreated == TRUE)
{
ASSERT(FALSE);
return CS_DUPLICATE_INITIALIZE;
}
// list creation is not protected against multiple threads because it is only
// called when a process is started, not when a thread is started.
//
// LAURABU
// BOGUS BUGBUG
//
// This table code was never stressed by the people who wrote it. It
// totally falls apart when it completely fills up
// * Allocating the last item doesn't work
// * Freeing the last item doesn't work
// * Resizing larger doesn't work
//
// Since it doesn't take a lot of memory, a decent solution is to just
// allocate it maximum+1 sized, and leave the last item free.
//
gpCallObjectTable = new TSTable <CALL_OBJECT> (258);
if (gpCallObjectTable == NULL || gpCallObjectTable->IsInitialized() == FALSE)
{
return CS_NO_MEMORY;
}
CRVSource.wCRV = (WORD) (time(NULL) & 0x7fff);
InitializeCriticalSection(&(CRVSource.Lock));
Q931GlobalTimer.dwTicks301 = Q931_TICKS_301;
Q931GlobalTimer.dwTicks303 = Q931_TICKS_303;
InitializeCriticalSection(&(Q931GlobalTimer.Lock));
bCallListCreated = TRUE;
return CS_OK;
}
//====================================================================================
// this routine assumes all of the events and sockets belonging to each object
// are already destroyed. It just makes sure memory is cleaned up.
//====================================================================================
CS_STATUS
CallListDestroy()
{
if (bCallListCreated == FALSE)
{
ASSERT(FALSE);
return CS_INTERNAL_ERROR;
}
// For all entries, hang up the calls
gpCallObjectTable->EnumerateEntries(Q931HangUpAllCalls,
NULL);
// Get rid of the call object table
delete gpCallObjectTable;
gpCallObjectTable = NULL;
DeleteCriticalSection(&(Q931GlobalTimer.Lock));
DeleteCriticalSection(&(CRVSource.Lock));
bCallListCreated = FALSE;
return CS_OK;
}
//====================================================================================
//====================================================================================
void
CallObjectFree(P_CALL_OBJECT pCallObject)
{
if (pCallObject->NonStandardData.sData.pOctetString != NULL)
{
MemFree(pCallObject->NonStandardData.sData.pOctetString);
pCallObject->NonStandardData.sData.pOctetString = NULL;
}
if (pCallObject->VendorInfoPresent)
{
if (pCallObject->VendorInfo.pProductNumber != NULL)
{
MemFree(pCallObject->VendorInfo.pProductNumber);
}
if (pCallObject->VendorInfo.pVersionNumber != NULL)
{
MemFree(pCallObject->VendorInfo.pVersionNumber);
}
}
Q931FreeAliasNames(pCallObject->pCallerAliasList);
pCallObject->pCallerAliasList = NULL;
Q931FreeAliasNames(pCallObject->pCalleeAliasList);
pCallObject->pCalleeAliasList = NULL;
Q931FreeAliasNames(pCallObject->pExtraAliasList);
pCallObject->pExtraAliasList = NULL;
Q931FreeAliasItem(pCallObject->pExtensionAliasItem);
pCallObject->pExtensionAliasItem = NULL;
MemFree(pCallObject);
}
//====================================================================================
//====================================================================================
CS_STATUS
CallObjectCreate(
PHQ931CALL phQ931Call,
DWORD_PTR dwListenToken,
DWORD_PTR dwUserToken,
Q931_CALLBACK ConnectCallback,
BOOL fIsCaller,
CC_ADDR *pLocalAddr, // Local address on which channel is connected
CC_ADDR *pPeerConnectAddr, // Address to which channel is connected
CC_ADDR *pPeerCallAddr, // Address of opposite call end-point.
CC_ADDR *pSourceAddr, // Address of this call end-point.
CC_CONFERENCEID *pConferenceID,
WORD wGoal,
WORD wCallType,
BOOL bCallerIsMC,
char *pszDisplay,
char *pszCalledPartyNumber,
PCC_ALIASNAMES pCallerAliasList,
PCC_ALIASNAMES pCalleeAliasList,
PCC_ALIASNAMES pExtraAliasList,
PCC_ALIASITEM pExtensionAliasItem,
PCC_ENDPOINTTYPE pEndpointType,
PCC_NONSTANDARDDATA pNonStandardData, // questionable!
WORD wCRV,
LPGUID pCallIdentifier)
{
P_CALL_OBJECT pCallObject = NULL;
CS_STATUS status = CS_OK;
CS_STATUS CopyStatus = CS_OK;
DWORD dwIndex = 0;
int rc = 0;
// make sure the call list has been created.
if (bCallListCreated == FALSE)
{
ASSERT(FALSE);
return CS_INTERNAL_ERROR;
}
// validate all parameters for bogus values.
if ((phQ931Call == NULL) || (ConnectCallback == NULL))
{
ASSERT(FALSE);
return CS_BAD_PARAM;
}
// set phQ931Call now, in case we encounter an error later.
*phQ931Call = 0;
pCallObject = (P_CALL_OBJECT)MemAlloc(sizeof(CALL_OBJECT));
if (pCallObject == NULL)
{
return CS_NO_MEMORY;
}
memset(pCallObject, 0, sizeof(CALL_OBJECT));
// create and init an oss world struct for each call object. This is
// necessary to work in MT environments.
rc = Q931_InitWorld(&pCallObject->World);
if (rc != ASN1_SUCCESS)
{
#if defined(_DEBUG)
ISRERROR(ghISRInst, "Q931_InitCoder() returned: %d ", rc);
#endif
return CS_SUBSYSTEM_FAILURE;
}
pCallObject->LocalAddr.bMulticast = FALSE;
pCallObject->PeerConnectAddr.bMulticast = FALSE;
pCallObject->PeerCallAddr.bMulticast = FALSE;
pCallObject->SourceAddr.bMulticast = FALSE;
if(pCallIdentifier)
{
memcpy(&pCallObject->CallIdentifier, pCallIdentifier, sizeof(GUID));
}
if (wCRV == 0)
{
if (Q931CRVNew(&pCallObject->wCRV) != CS_OK)
{
CallObjectFree(pCallObject);
return CS_INTERNAL_ERROR;
}
}
else
{
pCallObject->wCRV = wCRV;
}
pCallObject->szDisplay[0] = '\0';
if (pszDisplay)
{
strcpy(pCallObject->szDisplay, pszDisplay);
}
pCallObject->szCalledPartyNumber[0] = '\0';
if (pszCalledPartyNumber)
{
strcpy(pCallObject->szCalledPartyNumber, pszCalledPartyNumber);
}
pCallObject->dwListenToken = dwListenToken;
pCallObject->dwUserToken = dwUserToken;
pCallObject->Callback = ConnectCallback;
pCallObject->bCallState = CALLSTATE_NULL;
pCallObject->fIsCaller = fIsCaller;
if (pLocalAddr)
{
pCallObject->LocalAddr = *pLocalAddr;
}
if (pPeerConnectAddr)
{
pCallObject->PeerConnectAddr = *pPeerConnectAddr;
}
if (pPeerCallAddr)
{
pCallObject->PeerCallAddr = *pPeerCallAddr;
pCallObject->PeerCallAddrPresent = TRUE;
}
else
{
pCallObject->PeerCallAddrPresent = FALSE;
}
if (pSourceAddr)
{
pCallObject->SourceAddr = *pSourceAddr;
pCallObject->SourceAddrPresent = TRUE;
}
else
{
pCallObject->SourceAddrPresent = FALSE;
}
if (pConferenceID == NULL)
{
memset(&(pCallObject->ConferenceID), 0, sizeof(CC_CONFERENCEID));
}
else
{
int length = min(sizeof(pConferenceID->buffer),
sizeof(pCallObject->ConferenceID.buffer));
memcpy(pCallObject->ConferenceID.buffer,
pConferenceID->buffer, length);
}
pCallObject->wGoal = wGoal;
pCallObject->bCallerIsMC = bCallerIsMC;
pCallObject->wCallType = wCallType;
if (pNonStandardData != NULL)
{
pCallObject->NonStandardData = *pNonStandardData;
if (pNonStandardData->sData.wOctetStringLength > 0)
{
pCallObject->NonStandardData.sData.pOctetString =
(BYTE *) MemAlloc(pNonStandardData->sData.wOctetStringLength);
if (pCallObject->NonStandardData.sData.pOctetString == NULL)
{
CallObjectFree(pCallObject);
return CS_NO_MEMORY;
}
memcpy(pCallObject->NonStandardData.sData.pOctetString,
pNonStandardData->sData.pOctetString,
pNonStandardData->sData.wOctetStringLength);
}
pCallObject->NonStandardDataPresent = TRUE;
}
else
{
pCallObject->NonStandardDataPresent = FALSE;
}
CopyStatus = Q931CopyAliasNames(&(pCallObject->pCallerAliasList),
pCallerAliasList);
if (CopyStatus != CS_OK)
{
CallObjectFree(pCallObject);
return CopyStatus;
}
CopyStatus = Q931CopyAliasNames(&(pCallObject->pCalleeAliasList),
pCalleeAliasList);
if (CopyStatus != CS_OK)
{
CallObjectFree(pCallObject);
return CopyStatus;
}
CopyStatus = Q931CopyAliasNames(&(pCallObject->pExtraAliasList),
pExtraAliasList);
if (CopyStatus != CS_OK)
{
CallObjectFree(pCallObject);
return CopyStatus;
}
CopyStatus = Q931CopyAliasItem(&(pCallObject->pExtensionAliasItem),
pExtensionAliasItem);
if (CopyStatus != CS_OK)
{
CallObjectFree(pCallObject);
return CopyStatus;
}
pCallObject->bResolved = FALSE;
pCallObject->VendorInfoPresent = FALSE;
pCallObject->bIsTerminal = TRUE;
pCallObject->bIsGateway = FALSE;
if (pEndpointType != NULL)
{
PCC_VENDORINFO pVendorInfo = pEndpointType->pVendorInfo;
if (pVendorInfo != NULL)
{
pCallObject->VendorInfoPresent = TRUE;
pCallObject->VendorInfo = *(pVendorInfo);
if (pVendorInfo->pProductNumber && pVendorInfo->pProductNumber->pOctetString &&
pVendorInfo->pProductNumber->wOctetStringLength)
{
memcpy(pCallObject->bufVendorProduct,
pVendorInfo->pProductNumber->pOctetString,
pVendorInfo->pProductNumber->wOctetStringLength);
pCallObject->VendorInfo.pProductNumber = (CC_OCTETSTRING*) MemAlloc(sizeof(CC_OCTETSTRING));
if (pCallObject->VendorInfo.pProductNumber == NULL)
{
CallObjectFree(pCallObject);
return CS_NO_MEMORY;
}
pCallObject->VendorInfo.pProductNumber->pOctetString =
pCallObject->bufVendorProduct;
pCallObject->VendorInfo.pProductNumber->wOctetStringLength =
pVendorInfo->pProductNumber->wOctetStringLength;
}
else
{
pCallObject->VendorInfo.pProductNumber = NULL;
}
if (pVendorInfo->pVersionNumber && pVendorInfo->pVersionNumber->pOctetString &&
pVendorInfo->pVersionNumber->wOctetStringLength)
{
memcpy(pCallObject->bufVendorVersion,
pVendorInfo->pVersionNumber->pOctetString,
pVendorInfo->pVersionNumber->wOctetStringLength);
pCallObject->VendorInfo.pVersionNumber = (CC_OCTETSTRING*) MemAlloc(sizeof(CC_OCTETSTRING));
if (pCallObject->VendorInfo.pVersionNumber == NULL)
{
CallObjectFree(pCallObject);
return CS_NO_MEMORY;
}
pCallObject->VendorInfo.pVersionNumber->pOctetString =
pCallObject->bufVendorVersion;
pCallObject->VendorInfo.pVersionNumber->wOctetStringLength =
pVendorInfo->pVersionNumber->wOctetStringLength;
}
else
{
pCallObject->VendorInfo.pVersionNumber = NULL;
}
}
pCallObject->bIsTerminal = pEndpointType->bIsTerminal;
pCallObject->bIsGateway = pEndpointType->bIsGateway;
}
Q931MakePhysicalID(&pCallObject->dwPhysicalId);
// Insert the object into the table...if that doesn't work, blow away the object.
if (gpCallObjectTable->CreateAndLock(pCallObject,
&dwIndex) == FALSE)
{
CallObjectFree(pCallObject);
return CS_INTERNAL_ERROR;
}
// Save the index as the handle (this makes it easier to find the object later).
*phQ931Call = pCallObject->hQ931Call = (HQ931CALL) dwIndex;
#if defined(_DEBUG)
ISRTRACE(ghISRInst, "CallObjectCreate() -returned-> 0x%.8x", dwIndex);
#endif
// Unlock the entry
gpCallObjectTable->Unlock(dwIndex);
return CS_OK;
}
//====================================================================================
//====================================================================================
CS_STATUS
CallObjectDestroy(
P_CALL_OBJECT pCallObject)
{
if (pCallObject == NULL)
{
ASSERT(FALSE);
return CS_BAD_PARAM;
}
#if defined (_DEBUG)
ISRTRACE(ghISRInst, "CallObjectDestroy(0x%.8x)", (DWORD)pCallObject->hQ931Call);
#endif
Q931_TermWorld(&pCallObject->World);
// Since the caller must already have a lock on the object, remove the entry from
// the table. We won't let the table delete the object as we want to clean up.
if (gpCallObjectTable->Delete((DWORD) pCallObject->hQ931Call) == FALSE)
{
return CS_OK;
}
Q931StopTimer(pCallObject, Q931_TIMER_301);
Q931StopTimer(pCallObject, Q931_TIMER_303);
// Unlock the object
gpCallObjectTable->Unlock((DWORD) pCallObject->hQ931Call);
// Free up the call object
CallObjectFree(pCallObject);
return CS_OK;
}
//====================================================================================
//====================================================================================
CS_STATUS
CallObjectLock(
HQ931CALL hQ931Call,
PP_CALL_OBJECT ppCallObject)
{
if (ppCallObject == NULL)
{
ASSERT(FALSE);
return CS_BAD_PARAM;
}
// Attempt to lock the entry. If that fails, we'll return CS_BAD_PARAM under
// the assumption that the entry is invalid.
*ppCallObject = gpCallObjectTable->Lock((DWORD) hQ931Call);
return (*ppCallObject == NULL ? CS_BAD_PARAM : CS_OK);
}
//====================================================================================
//====================================================================================
CS_STATUS
CallObjectUnlock(
P_CALL_OBJECT pCallObject)
{
if (pCallObject == NULL)
{
ASSERT(FALSE);
return CS_BAD_PARAM;
}
return CallEntryUnlock(pCallObject->hQ931Call);
}
//====================================================================================
//====================================================================================
CS_STATUS
CallEntryUnlock(
HQ931CALL hQ931Call)
{
// Unlock the entry
if (gpCallObjectTable->Unlock(hQ931Call) == FALSE)
{
#if defined(_DEBUG)
ISRERROR(ghISRInst, "gpCallObjectTable->Unlock(0x%.8x) FAILED!!!!", (DWORD)hQ931Call);
#endif
return CS_BAD_PARAM;
}
return CS_OK;
}
//====================================================================================
//====================================================================================
CS_STATUS
CallObjectValidate(
HQ931CALL hQ931Call)
{
if (gpCallObjectTable->Validate((DWORD) hQ931Call) == TRUE)
{
return CS_OK;
}
return CS_BAD_PARAM;
}
//====================================================================================
//====================================================================================
BOOL
CallObjectFind(
HQ931CALL *phQ931Call,
WORD wCRV,
PCC_ADDR pPeerAddr)
{
Q931CALLOBJKEY Q931CallObjKey;
Q931CallObjKey.wCRV = wCRV;
Q931CallObjKey.pPeerAddr = pPeerAddr;
Q931CallObjKey.bFound = FALSE;
gpCallObjectTable->EnumerateEntries(Q931CallObjectFind,
(LPVOID) &Q931CallObjKey);
if(Q931CallObjKey.bFound == TRUE)
{
*phQ931Call = Q931CallObjKey.hQ931Call;
return TRUE;
}
return FALSE;
}
//====================================================================================
//====================================================================================
CS_STATUS CallObjectMarkForDelete(HQ931CALL hQ931Call)
{
// User must have the object already locked to call this.
// Mark the object as deleted but don't let the table delete the object's
// memory.
return (gpCallObjectTable->Delete((DWORD) hQ931Call) == FALSE ? CS_BAD_PARAM : CS_OK);
}
//- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
// Timer Routines...
//- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
//====================================================================================
// This routine will be called every 1000 ms if any call object
// has caused the Q931GlobalTimer to be created.
//====================================================================================
VOID CALLBACK
Q931TimerProc(HWND hwnd, UINT uMsg, UINT idEvent, DWORD dwTime)
{
DWORD dwTickCount = GetTickCount();
EnterCriticalSection(&(Q931GlobalTimer.Lock));
if (Q931GlobalTimer.bBusy)
{
LeaveCriticalSection(&(Q931GlobalTimer.Lock));
return;
}
Q931GlobalTimer.bBusy = TRUE;
// Check all of the entries for timeout
gpCallObjectTable->EnumerateEntries(Q931CheckForTimeout,
(LPVOID) &dwTickCount);
Q931GlobalTimer.bBusy = FALSE;
LeaveCriticalSection(&(Q931GlobalTimer.Lock));
}
//====================================================================================
//====================================================================================
HRESULT
Q931StartTimer(P_CALL_OBJECT pCallObject, DWORD wTimerId)
{
if (pCallObject == NULL)
{
return CS_BAD_PARAM;
}
switch (wTimerId)
{
case Q931_TIMER_301:
if (pCallObject->dwTimerAlarm301)
{
// timer is already set for this call object...
return CS_INTERNAL_ERROR;
}
EnterCriticalSection(&(Q931GlobalTimer.Lock));
pCallObject->dwTimerAlarm301 = GetTickCount() + Q931GlobalTimer.dwTicks301;
LeaveCriticalSection(&(Q931GlobalTimer.Lock));
break;
case Q931_TIMER_303:
if (pCallObject->dwTimerAlarm303)
{
// timer is already set for this call object...
return CS_INTERNAL_ERROR;
}
EnterCriticalSection(&(Q931GlobalTimer.Lock));
pCallObject->dwTimerAlarm303 = GetTickCount() + Q931GlobalTimer.dwTicks303;
LeaveCriticalSection(&(Q931GlobalTimer.Lock));
break;
default:
return CS_BAD_PARAM;
break;
}
EnterCriticalSection(&(Q931GlobalTimer.Lock));
if (!Q931GlobalTimer.dwTimerCount)
{
Q931GlobalTimer.uTimerId = SetTimer(NULL, 0, 1000, (TIMERPROC)Q931TimerProc);
}
Q931GlobalTimer.dwTimerCount++;
LeaveCriticalSection(&(Q931GlobalTimer.Lock));
return CS_OK;
}
//====================================================================================
//====================================================================================
HRESULT
Q931StopTimer(P_CALL_OBJECT pCallObject, DWORD wTimerId)
{
if (pCallObject == NULL)
{
return CS_BAD_PARAM;
}
switch (wTimerId)
{
case Q931_TIMER_301:
if (!pCallObject->dwTimerAlarm301)
{
return CS_OK;
}
pCallObject->dwTimerAlarm301 = 0;
break;
case Q931_TIMER_303:
if (!pCallObject->dwTimerAlarm303)
{
return CS_OK;
}
pCallObject->dwTimerAlarm303 = 0;
break;
default:
return CS_BAD_PARAM;
break;
}
EnterCriticalSection(&(Q931GlobalTimer.Lock));
if (Q931GlobalTimer.dwTimerCount > 0)
{
Q931GlobalTimer.dwTimerCount--;
if (!Q931GlobalTimer.dwTimerCount)
{
KillTimer(NULL, Q931GlobalTimer.uTimerId);
Q931GlobalTimer.uTimerId = 0;
}
}
LeaveCriticalSection(&(Q931GlobalTimer.Lock));
return CS_OK;
}
//====================================================================================
//====================================================================================
CS_STATUS
Q931SetAlertingTimeout(DWORD dwDuration)
{
EnterCriticalSection(&(Q931GlobalTimer.Lock));
if (dwDuration)
{
Q931GlobalTimer.dwTicks303 = dwDuration;
}
else
{
Q931GlobalTimer.dwTicks303 = Q931_TICKS_303;
}
LeaveCriticalSection(&(Q931GlobalTimer.Lock));
return CS_OK;
}
//====================================================================================
//====================================================================================
DWORD Q931HangUpAllCalls(P_CALL_OBJECT pCallObject, LPVOID context)
{
HQ931CALL hQ931Call = pCallObject->hQ931Call;
// Try to hangup the call object.
Q931Hangup(hQ931Call, CC_REJECT_NORMAL_CALL_CLEARING);
// Try to lock the object. If that succeeds, then we want to force the object to
// be deleted. We should never have to do this as the hang up is supposed to
// take care of that for us.
if (gpCallObjectTable->Lock(hQ931Call) != NULL)
{
CallObjectDestroy(pCallObject);
}
return CALLBACK_DELETE_ENTRY;
}
//====================================================================================
//====================================================================================
DWORD
Q931CallObjectFind(P_CALL_OBJECT pCallObject, LPVOID context)
{
PQ931CALLOBJKEY pQ931CallObjKey = (PQ931CALLOBJKEY) context;
PCC_ADDR pPeerAddr = pQ931CallObjKey->pPeerAddr;
WORD wCRV = pQ931CallObjKey->wCRV;
if (!pCallObject->bResolved)
{
return(CALLBACK_CONTINUE);
}
if ((pCallObject->wCRV & (~0x8000)) == (wCRV & (~0x8000)))
{
if (!pPeerAddr)
{
pQ931CallObjKey->bFound = TRUE;
pQ931CallObjKey->hQ931Call = pCallObject->hQ931Call;
return(CALLBACK_ABORT);
}
else if ((pCallObject->PeerConnectAddr.nAddrType == CC_IP_BINARY) &&
(pPeerAddr->nAddrType == CC_IP_BINARY) &&
(pCallObject->PeerConnectAddr.Addr.IP_Binary.dwAddr == pPeerAddr->Addr.IP_Binary.dwAddr))
{
pQ931CallObjKey->bFound = TRUE;
pQ931CallObjKey->hQ931Call = pCallObject->hQ931Call;
return(CALLBACK_ABORT);
}
}
return(CALLBACK_CONTINUE);
}
//====================================================================================
//====================================================================================
DWORD Q931CheckForTimeout(P_CALL_OBJECT pCallObject, LPVOID context)
{
DWORD dwTickCount = *((LPDWORD) context);
// Determine if a timer has expired for the entry
if (pCallObject->dwTimerAlarm301 &&
(pCallObject->dwTimerAlarm301 <= dwTickCount))
{
Q931StopTimer(pCallObject, Q931_TIMER_301);
Q931StopTimer(pCallObject, Q931_TIMER_303);
if (pCallObject->dwTimerAlarm303 &&
(pCallObject->dwTimerAlarm303 < pCallObject->dwTimerAlarm301) &&
(pCallObject->dwTimerAlarm303 <= dwTickCount))
{
CallBackT303(pCallObject);
}
else
{
CallBackT301(pCallObject);
}
}
else if (pCallObject->dwTimerAlarm303 &&
(pCallObject->dwTimerAlarm303 <= dwTickCount))
{
Q931StopTimer(pCallObject, Q931_TIMER_301);
Q931StopTimer(pCallObject, Q931_TIMER_303);
CallBackT303(pCallObject);
}
return CALLBACK_CONTINUE;
}
/***************************************************************************
*
* NAME
* HangupPendingCalls - Hangs up incoming calls from specified destination
*
* DESCRIPTION
* This function will hang up all calls in waiting
* from the specified destination to prevent DOS attacks
* that would fill up the call object table.
*
* PARAMETERS
* pCallObject Current enumerated call object
* context Callback parameter representing source IP address
*
* RETURN VALUE
* CALLBACK_ABORT Stop enumerating calls
* CALLBACK_CONTINUE Continue enumerating calls
*
***************************************************************************/
DWORD Q931HangupPendingCallsCallback(P_CALL_OBJECT pCallObject, LPVOID context)
{
ASSERT(NULL != pCallObject);
// Only hang up incoming calls
if(FALSE == pCallObject->fIsCaller)
{
if(CALLSTATE_INITIATED == pCallObject->bCallState)
{
Q931Hangup(pCallObject->hQ931Call, CC_REJECT_SECURITY_DENIED);
}
}
return CALLBACK_CONTINUE;
}
HRESULT Q931HangupPendingCalls(LPVOID context)
{
gpCallObjectTable->EnumerateEntries(Q931HangupPendingCallsCallback, context);
return NOERROR;
}