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windows-nt/Source/XPSP1/NT/enduser/netmeeting/av/callcont/q931.c
CryptoAlgo Inc b3cac27891 Add source files
2020-09-26 16:20:57 +08:00

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/****************************************************************************
*
* $Archive: S:/STURGEON/SRC/Q931/VCS/q931.c_v $
*
* 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: 1.122 $
* $Date: 04 Mar 1997 20:59:26 $
* $Author: MANDREWS $
*
* BCL's revision info:
* Revision: 1.99
* Date: 19 Nov 1996 14:54:02
* Author: rodellx
*
* Deliverable:
*
* Abstract:
*
*
* Notes:
*
***************************************************************************/
// [ ] Add facility ie to FACILITY MSG.
// [ ] Read Q931 Appendix D.
#pragma warning ( disable : 4057 4100 4115 4201 4214 4514 )
#include "precomp.h"
#ifdef __cplusplus
extern "C" {
#endif
#include <string.h>
#include <stdio.h>
#include <rpc.h>
#include "apierror.h"
#include "isrg.h"
#include "incommon.h"
#include "linkapi.h"
#include "common.h"
#include "q931.h"
#include "utils.h"
#include "hlisten.h"
#include "hcall.h"
#include "q931pdu.h"
#if (defined(_DEBUG) || defined(PCS_COMPLIANCE))
#include "interop.h"
#include "q931plog.h"
LPInteropLogger Q931Logger;
#endif
#define RECEIVE_BUFFER_SIZE 0x2000
#define HANGUP_TIMEOUT 1000 // 1 second
#define CANCEL_LISTEN_TIMEOUT 5000 // 5 seconds
// variable needed to support ISR debug facility.
#if (ISRDEBUGINFO >= 1)
WORD ghISRInst = 0;
#endif
#ifdef UNICODE_TRACE
// We include this header to fix problems with macro expansion when Unicode is turned on.
#include "unifix.h"
#endif
#define _Unicode(x) L ## x
#define Unicode(x) _Unicode(x)
// global data used by WinSock.
static BOOL bQ931Initialized = FALSE;
static Q931_RECEIVE_PDU_CALLBACK gReceivePDUHookProc = NULL;
static struct
{
DWORD TempID;
CC_CONFERENCEID ConferenceID;
CRITICAL_SECTION Lock;
} ConferenceIDSource;
extern VOID Q931PduInit();
//====================================================================================
//
// PRIVATE FUNCTIONS
//
//====================================================================================
//====================================================================================
//====================================================================================
void _FreeSetupASN(Q931_SETUP_ASN *pSetupASN)
{
ASSERT(pSetupASN != NULL);
// Cleanup any dynamically allocated fields within SetupASN
if (pSetupASN->NonStandardData.sData.pOctetString)
{
MemFree(pSetupASN->NonStandardData.sData.pOctetString);
pSetupASN->NonStandardData.sData.pOctetString = NULL;
}
if (pSetupASN->VendorInfo.pProductNumber)
{
MemFree(pSetupASN->VendorInfo.pProductNumber);
pSetupASN->VendorInfo.pProductNumber = NULL;
}
if (pSetupASN->VendorInfo.pVersionNumber)
{
MemFree(pSetupASN->VendorInfo.pVersionNumber);
pSetupASN->VendorInfo.pVersionNumber = NULL;
}
Q931FreeAliasNames(pSetupASN->pCallerAliasList);
pSetupASN->pCallerAliasList = NULL;
Q931FreeAliasNames(pSetupASN->pCalleeAliasList);
pSetupASN->pCalleeAliasList = NULL;
Q931FreeAliasNames(pSetupASN->pExtraAliasList);
pSetupASN->pExtraAliasList = NULL;
Q931FreeAliasItem(pSetupASN->pExtensionAliasItem);
pSetupASN->pExtensionAliasItem = NULL;
}
void _FreeReleaseCompleteASN(Q931_RELEASE_COMPLETE_ASN *pReleaseCompleteASN)
{
ASSERT(pReleaseCompleteASN != NULL);
// Cleanup any dynamically allocated fields within SetupASN
if (pReleaseCompleteASN->NonStandardData.sData.pOctetString)
{
MemFree(pReleaseCompleteASN->NonStandardData.sData.pOctetString);
pReleaseCompleteASN->NonStandardData.sData.pOctetString = NULL;
}
}
void _FreeFacilityASN(Q931_FACILITY_ASN *pFacilityASN)
{
ASSERT(pFacilityASN != NULL);
// Cleanup any dynamically allocated fields within SetupASN
if (pFacilityASN->NonStandardData.sData.pOctetString)
{
MemFree(pFacilityASN->NonStandardData.sData.pOctetString);
pFacilityASN->NonStandardData.sData.pOctetString = NULL;
}
}
void _FreeProceedingASN(Q931_CALL_PROCEEDING_ASN *pProceedingASN)
{
ASSERT(pProceedingASN != NULL);
// Cleanup any dynamically allocated fields within SetupASN
if (pProceedingASN->NonStandardData.sData.pOctetString)
{
MemFree(pProceedingASN->NonStandardData.sData.pOctetString);
pProceedingASN->NonStandardData.sData.pOctetString = NULL;
}
}
void _FreeAlertingASN(Q931_ALERTING_ASN *pAlertingASN)
{
ASSERT(pAlertingASN != NULL);
// Cleanup any dynamically allocated fields within SetupASN
if (pAlertingASN->NonStandardData.sData.pOctetString)
{
MemFree(pAlertingASN->NonStandardData.sData.pOctetString);
pAlertingASN->NonStandardData.sData.pOctetString = NULL;
}
}
void _FreeConnectASN(Q931_CONNECT_ASN *pConnectASN)
{
ASSERT(pConnectASN != NULL);
// Cleanup any dynamically allocated fields within SetupASN
if (pConnectASN->NonStandardData.sData.pOctetString)
{
MemFree(pConnectASN->NonStandardData.sData.pOctetString);
pConnectASN->NonStandardData.sData.pOctetString = NULL;
}
if (pConnectASN->VendorInfo.pProductNumber)
{
MemFree(pConnectASN->VendorInfo.pProductNumber);
pConnectASN->VendorInfo.pProductNumber = NULL;
}
if (pConnectASN->VendorInfo.pVersionNumber)
{
MemFree(pConnectASN->VendorInfo.pVersionNumber);
pConnectASN->VendorInfo.pVersionNumber = NULL;
}
}
void
_ConferenceIDNew(
CC_CONFERENCEID *pConferenceID)
{
UUID id;
int iresult;
EnterCriticalSection(&(ConferenceIDSource.Lock));
memset(ConferenceIDSource.ConferenceID.buffer, 0,
sizeof(ConferenceIDSource.ConferenceID.buffer));
iresult = UuidCreate(&id);
if ((iresult == RPC_S_OK) || (iresult ==RPC_S_UUID_LOCAL_ONLY))
{
memcpy(ConferenceIDSource.ConferenceID.buffer, &id,
min(sizeof(ConferenceIDSource.ConferenceID.buffer), sizeof(UUID)));
}
else
ASSERT(0);
memcpy(pConferenceID->buffer, ConferenceIDSource.ConferenceID.buffer,
sizeof(pConferenceID->buffer));
LeaveCriticalSection(&(ConferenceIDSource.Lock));
return;
}
//====================================================================================
// This function is used internally whenever a function needs to send a PDU.
// Note that before a datalinkSendRequest() is done, the call object is unlocked
// and then subsequently locked after returning. This is necessary to prevent deadlock
// in MT apps. Further, it is the responsibility of calling functions to revalidate
// the call object before using it.
//====================================================================================
CS_STATUS
Q931SendMessage(
P_CALL_OBJECT pCallObject,
BYTE* CodedPtrPDU,
DWORD CodedLengthPDU,
BOOL bOkToUnlock)
{
HQ931CALL hQ931Call;
DWORD dwPhysicalId;
HRESULT result;
ASSERT(pCallObject != NULL);
ASSERT(CodedPtrPDU != NULL);
ASSERT(CodedLengthPDU != 0);
hQ931Call = pCallObject->hQ931Call;
dwPhysicalId = pCallObject->dwPhysicalId;
// send the message.
if (pCallObject->bConnected)
{
// Unlock the call object before we call down to Link Layer (if caller said it was ok)
if(bOkToUnlock)
CallObjectUnlock(pCallObject);
#if (defined(_DEBUG) || defined(PCS_COMPLIANCE))
InteropOutput(Q931Logger, (BYTE FAR*)CodedPtrPDU, CodedLengthPDU, Q931LOG_SENT_PDU);
#endif
result = datalinkSendRequest(dwPhysicalId, CodedPtrPDU, CodedLengthPDU);
// Now attempt to lock the object again. Note: higher level funcs must
// be sure to call CallObjectValidate before assuming they have a valid lock
if (bOkToUnlock && ((CallObjectLock(hQ931Call, &pCallObject) != CS_OK) || (pCallObject == NULL)))
{
ISRERROR(ghISRInst, "CallObjectLock() returned error (object not found).", 0L);
}
// Note: if we can't get the lock, perhaps we should pass back a specific return code
// that higher layers can check for??? For now, they should call CallObjectValidate()
// before assuming the call object is still good.
if (FAILED(result))
{
ISRERROR(ghISRInst, "datalinkSendRequest() failed", 0L);
MemFree(CodedPtrPDU);
}
return result;
}
ISRWARNING(ghISRInst, "Q931SendMessage: message not sent because bConnected is FALSE", 0L);
MemFree(CodedPtrPDU);
return CS_OK;
}
//====================================================================================
//====================================================================================
CS_STATUS
Q931RingingInternal(P_CALL_OBJECT pCallObject, WORD wCRV)
{
CC_ENDPOINTTYPE EndpointType;
DWORD CodedLengthASN;
BYTE *CodedPtrASN;
BINARY_STRING UserUserData;
DWORD CodedLengthPDU;
BYTE *CodedPtrPDU;
HRESULT result = CS_OK;
int nError = 0;
HQ931CALL hQ931Call = pCallObject->hQ931Call;
if (pCallObject->VendorInfoPresent)
EndpointType.pVendorInfo = &pCallObject->VendorInfo;
else
EndpointType.pVendorInfo = NULL;
EndpointType.bIsTerminal = pCallObject->bIsTerminal;
EndpointType.bIsGateway = pCallObject->bIsGateway;
result = Q931AlertingEncodeASN(
NULL, /* pNonStandardData */
NULL, /* h245Addr */
&EndpointType,
&pCallObject->World,
&CodedPtrASN,
&CodedLengthASN,
&pCallObject->CallIdentifier);
if (result != CS_OK || CodedLengthASN == 0 || CodedPtrASN == NULL)
{
ISRERROR(ghISRInst, "Q931AlertingEncodeASN() failed, nothing to send.", 0L);
if (CodedPtrASN != NULL)
{
Q931FreeEncodedBuffer(&pCallObject->World, CodedPtrASN);
}
return (result != CS_OK) ? result : CS_INTERNAL_ERROR;
}
UserUserData.length = (WORD)CodedLengthASN;
UserUserData.ptr = CodedPtrASN;
result = Q931AlertingEncodePDU(wCRV, &UserUserData, &CodedPtrPDU,
&CodedLengthPDU);
if (CodedPtrASN != NULL)
{
Q931FreeEncodedBuffer(&pCallObject->World, CodedPtrASN);
}
if ((result != CS_OK) || (CodedLengthPDU == 0) ||
(CodedPtrPDU == NULL))
{
ISRERROR(ghISRInst, "Q931AlertingEncodePDU() failed, nothing to send.", 0L);
if (CodedPtrPDU != NULL)
{
MemFree(CodedPtrPDU);
}
if (result != CS_OK)
{
return result;
}
return CS_INTERNAL_ERROR;
}
else
{
result = Q931SendMessage(pCallObject, CodedPtrPDU, CodedLengthPDU, TRUE);
if(CallObjectValidate(hQ931Call) != CS_OK)
return(CS_INTERNAL_ERROR);
}
return result;
}
//====================================================================================
//====================================================================================
CS_STATUS
Q931OnCallSetup(
P_CALL_OBJECT pCallObject,
Q931MESSAGE *pMessage,
Q931_SETUP_ASN *pSetupASN)
{
DWORD result;
HQ931CALL hQ931Call;
HRESULT Status;
// if the callstate is anything other than null, ignore...
// if (pCallObject->bCallState != CALLSTATE_NULL)
// {
// return CS_OK;
// }
hQ931Call = pCallObject->hQ931Call;
if (pMessage->CallReference & 0x8000)
{
// the message came from the callee, so this should be ignored???
}
pMessage->CallReference &= ~(0x8000); // strip off the high bit.
pCallObject->wCRV = pMessage->CallReference;
pCallObject->wGoal = pSetupASN->wGoal;
pCallObject->bCallerIsMC = pSetupASN->bCallerIsMC;
pCallObject->wCallType = pSetupASN->wCallType;
pCallObject->ConferenceID = pSetupASN->ConferenceID;
pCallObject->CallIdentifier = pSetupASN->CallIdentifier;
pCallObject->bCallState = CALLSTATE_PRESENT;
{
CSS_CALL_INCOMING EventData;
WCHAR szUnicodeDisplay[CC_MAX_DISPLAY_LENGTH + 1];
WCHAR szUnicodeCalledPartyNumber[CC_MAX_PARTY_NUMBER_LEN + 1];
EventData.wGoal = pCallObject->wGoal;
EventData.wCallType = pCallObject->wCallType;
EventData.bCallerIsMC = pCallObject->bCallerIsMC;
EventData.ConferenceID = pCallObject->ConferenceID;
EventData.pSourceAddr = NULL;
if (pSetupASN->SourceAddrPresent)
{
EventData.pSourceAddr = &(pSetupASN->SourceAddr);
}
EventData.pCallerAddr = NULL;
if (pSetupASN->CallerAddrPresent)
{
EventData.pCallerAddr = &(pSetupASN->CallerAddr);
}
EventData.pCalleeDestAddr = NULL;
if (pSetupASN->CalleeDestAddrPresent)
{
EventData.pCalleeDestAddr = &(pSetupASN->CalleeDestAddr);
}
EventData.pLocalAddr = NULL;
if (pSetupASN->CalleeAddrPresent)
{
EventData.pLocalAddr = &(pSetupASN->CalleeAddr);
}
if (!(pSetupASN->NonStandardDataPresent) ||
(pSetupASN->NonStandardData.sData.wOctetStringLength == 0) ||
(pSetupASN->NonStandardData.sData.pOctetString == NULL))
{
EventData.pNonStandardData = NULL;
}
else
{
EventData.pNonStandardData = &(pSetupASN->NonStandardData);
}
EventData.pCallerAliasList = pSetupASN->pCallerAliasList;
EventData.pCalleeAliasList = pSetupASN->pCalleeAliasList;
EventData.pExtraAliasList = pSetupASN->pExtraAliasList;
EventData.pExtensionAliasItem = pSetupASN->pExtensionAliasItem;
EventData.CallIdentifier = pSetupASN->CallIdentifier;
EventData.pszDisplay = NULL;
if (pMessage->Display.Present && pMessage->Display.Contents)
{
MultiByteToWideChar(CP_ACP, 0, (const char *)pMessage->Display.Contents, -1,
szUnicodeDisplay, sizeof(szUnicodeDisplay) / sizeof(szUnicodeDisplay[0]));
EventData.pszDisplay = szUnicodeDisplay;
}
EventData.pszCalledPartyNumber = NULL;
if (pMessage->CalledPartyNumber.Present && pMessage->CalledPartyNumber.PartyNumberLength)
{
MultiByteToWideChar(CP_ACP, 0, (const char *)pMessage->CalledPartyNumber.PartyNumbers, -1,
szUnicodeCalledPartyNumber, sizeof(szUnicodeCalledPartyNumber) / sizeof(szUnicodeCalledPartyNumber[0]));
EventData.pszCalledPartyNumber = szUnicodeCalledPartyNumber;
}
EventData.pSourceEndpointType = &(pSetupASN->EndpointType);
EventData.wCallReference = pMessage->CallReference;
result = pCallObject->Callback((BYTE)Q931_CALL_INCOMING,
pCallObject->hQ931Call, pCallObject->dwListenToken,
pCallObject->dwUserToken, &EventData);
}
Status = CallObjectValidate(hQ931Call);
if (Status != CS_OK)
return Status;
if (result == 0)
{
WORD wCRV = (WORD)(pMessage->CallReference | 0x8000);
HRESULT Status;
Status = Q931RingingInternal(pCallObject, wCRV);
if (Status != CS_OK)
{
return Status;
}
pCallObject->bCallState = CALLSTATE_RECEIVED;
}
return CS_OK;
}
//====================================================================================
//====================================================================================
CS_STATUS
Q931Ringing(
HQ931CALL hQ931Call,
WORD *pwCRV)
{
P_CALL_OBJECT pCallObject = NULL;
CS_STATUS Status;
WORD wCRV;
if (bQ931Initialized == FALSE)
{
ASSERT(FALSE);
return CS_NOT_INITIALIZED;
}
ISRTRACE(ghISRInst, "Entering Q931Ringing()...", 0L);
// need parameter checking...
if ((CallObjectLock(hQ931Call, &pCallObject) != CS_OK) || (pCallObject == NULL))
{
ISRERROR(ghISRInst, "CallObjectLock() returned error (object not found).", 0L);
return CS_BAD_PARAM;
}
if (pwCRV != NULL)
{
wCRV = *pwCRV;
}
else
{
wCRV = pCallObject->wCRV;
}
Status = Q931RingingInternal(pCallObject, wCRV);
if (Status != CS_OK)
{
return Status;
}
pCallObject->bCallState = CALLSTATE_RECEIVED;
Status = CallObjectUnlock(pCallObject);
return Status;
}
//====================================================================================
//====================================================================================
CS_STATUS
Q931OnCallProceeding(
P_CALL_OBJECT pCallObject,
Q931MESSAGE *pMessage,
Q931_CALL_PROCEEDING_ASN *pProceedingASN)
{
pCallObject->bCallState = CALLSTATE_OUTGOING;
Q931StopTimer(pCallObject, Q931_TIMER_303);
return CS_OK;
}
//====================================================================================
//====================================================================================
CS_STATUS
Q931OnCallAlerting(
P_CALL_OBJECT pCallObject,
Q931MESSAGE *pMessage,
Q931_ALERTING_ASN *pAlertingASN)
{
DWORD result;
pCallObject->bCallState = CALLSTATE_DELIVERED;
if (pAlertingASN != NULL)
{
// we could pass h245addr, userinfo, and conferenceid
// if desired later...
// (this would be passed in the pAlertingASN field)
}
Q931StopTimer(pCallObject, Q931_TIMER_303);
Q931StartTimer(pCallObject, Q931_TIMER_301);
result = pCallObject->Callback((BYTE)Q931_CALL_RINGING,
pCallObject->hQ931Call, pCallObject->dwListenToken,
pCallObject->dwUserToken, NULL);
return CS_OK;
}
//====================================================================================
//====================================================================================
CS_STATUS
Q931OnCallConnect(
P_CALL_OBJECT pCallObject,
Q931MESSAGE *pMessage,
Q931_CONNECT_ASN *pConnectASN)
{
DWORD result;
if ((pMessage->CallReference & 0x8000) == 0)
{
// the message came from the caller, so this should be ignored???
}
pMessage->CallReference &= ~(0x8000); // strip off the high bit.
pCallObject->ConferenceID = pConnectASN->ConferenceID;
pCallObject->bCallState = CALLSTATE_ACTIVE;
{
CSS_CALL_ACCEPTED EventData;
WCHAR szUnicodeDisplay[CC_MAX_DISPLAY_LENGTH + 1];
// populate the event data struct.
EventData.ConferenceID = pCallObject->ConferenceID;
if (pCallObject->PeerCallAddrPresent)
{
EventData.pCalleeAddr = &(pCallObject->PeerCallAddr);
}
else
{
EventData.pCalleeAddr = NULL;
}
EventData.pLocalAddr = &(pCallObject->LocalAddr);
EventData.pH245Addr = NULL;
if (pConnectASN->h245AddrPresent)
{
EventData.pH245Addr = &(pConnectASN->h245Addr);
}
if (!(pConnectASN->NonStandardDataPresent) ||
(pConnectASN->NonStandardData.sData.wOctetStringLength == 0) ||
(pConnectASN->NonStandardData.sData.pOctetString == NULL))
{
EventData.pNonStandardData = NULL;
}
else
{
EventData.pNonStandardData = &(pConnectASN->NonStandardData);
}
EventData.pszDisplay = NULL;
if (pMessage->Display.Present && pMessage->Display.Contents)
{
MultiByteToWideChar(CP_ACP, 0, (const char *)pMessage->Display.Contents, -1,
szUnicodeDisplay, sizeof(szUnicodeDisplay) / sizeof(szUnicodeDisplay[0]));
EventData.pszDisplay = szUnicodeDisplay;
}
EventData.pDestinationEndpointType = &(pConnectASN->EndpointType);
EventData.wCallReference = pMessage->CallReference;
Q931StopTimer(pCallObject, Q931_TIMER_303);
Q931StopTimer(pCallObject, Q931_TIMER_301);
result = pCallObject->Callback((BYTE)Q931_CALL_ACCEPTED,
pCallObject->hQ931Call, pCallObject->dwListenToken,
pCallObject->dwUserToken, &EventData);
}
return CS_OK;
}
//====================================================================================
//====================================================================================
CS_STATUS
Q931OnCallReleaseComplete(
P_CALL_OBJECT pCallObject,
Q931MESSAGE *pMessage,
Q931_RELEASE_COMPLETE_ASN *pReleaseCompleteASN)
{
DWORD result;
BYTE bCause = 0;
if (pMessage && pMessage->Cause.Present &&
(pMessage->Cause.Length >= 3))
{
bCause = (BYTE)(pMessage->Cause.Contents[2] & (~CAUSE_EXT_BIT));
}
Q931StopTimer(pCallObject, Q931_TIMER_303);
Q931StopTimer(pCallObject, Q931_TIMER_301);
// if this is the callee, or the call has been connected already,
// then this message should be treated as hangup (not reject).
if (!(pCallObject->fIsCaller) ||
(pCallObject->bCallState == CALLSTATE_ACTIVE) ||
(bCause == CAUSE_VALUE_NORMAL_CLEAR))
{
CSS_CALL_REMOTE_HANGUP EventData;
EventData.bReason = CC_REJECT_NORMAL_CALL_CLEARING;
pCallObject->bCallState = CALLSTATE_NULL;
result = pCallObject->Callback((BYTE)Q931_CALL_REMOTE_HANGUP,
pCallObject->hQ931Call, pCallObject->dwListenToken,
pCallObject->dwUserToken, &EventData);
}
else
{
CSS_CALL_REJECTED EventData;
pCallObject->bCallState = CALLSTATE_NULL;
// populate the event data struct.
switch (bCause)
{
case CAUSE_VALUE_NORMAL_CLEAR:
EventData.bRejectReason = CC_REJECT_NORMAL_CALL_CLEARING;
break;
case CAUSE_VALUE_USER_BUSY:
EventData.bRejectReason = CC_REJECT_USER_BUSY;
break;
case CAUSE_VALUE_SECURITY_DENIED:
EventData.bRejectReason = CC_REJECT_SECURITY_DENIED;
break;
case CAUSE_VALUE_NO_ANSWER:
EventData.bRejectReason = CC_REJECT_NO_ANSWER;
break;
case CAUSE_VALUE_NOT_IMPLEMENTED:
EventData.bRejectReason = CC_REJECT_NOT_IMPLEMENTED;
break;
case CAUSE_VALUE_INVALID_CRV:
EventData.bRejectReason = CC_REJECT_INVALID_IE_CONTENTS;
break;
case CAUSE_VALUE_IE_MISSING:
EventData.bRejectReason = CC_REJECT_MANDATORY_IE_MISSING;
break;
case CAUSE_VALUE_IE_CONTENTS:
EventData.bRejectReason = CC_REJECT_INVALID_IE_CONTENTS;
break;
case CAUSE_VALUE_TIMER_EXPIRED:
EventData.bRejectReason = CC_REJECT_TIMER_EXPIRED;
break;
default:
EventData.bRejectReason = pReleaseCompleteASN->bReason;
break;
}
EventData.ConferenceID = pCallObject->ConferenceID;
EventData.pAlternateAddr = NULL;
if (!(pReleaseCompleteASN->NonStandardDataPresent) ||
(pReleaseCompleteASN->NonStandardData.sData.wOctetStringLength == 0) ||
(pReleaseCompleteASN->NonStandardData.sData.pOctetString == NULL))
{
EventData.pNonStandardData = NULL;
}
else
{
EventData.pNonStandardData = &(pReleaseCompleteASN->NonStandardData);
}
result = pCallObject->Callback((BYTE)Q931_CALL_REJECTED,
pCallObject->hQ931Call, pCallObject->dwListenToken,
pCallObject->dwUserToken, &EventData);
}
return CS_OK;
}
//====================================================================================
//====================================================================================
CS_STATUS
Q931OnCallFacility(
P_CALL_OBJECT pCallObject,
Q931MESSAGE *pMessage,
Q931_FACILITY_ASN *pFacilityASN)
{
DWORD result;
// if this is the callee, or the call has been connected already,
// then this message should be treated as hangup (not reject).
if (!(pCallObject->fIsCaller) ||
(pCallObject->bCallState == CALLSTATE_ACTIVE))
{
CSS_CALL_REMOTE_HANGUP EventData;
EventData.bReason = pFacilityASN->bReason;
pCallObject->bCallState = CALLSTATE_NULL;
result = pCallObject->Callback((BYTE)Q931_CALL_REMOTE_HANGUP,
pCallObject->hQ931Call, pCallObject->dwListenToken,
pCallObject->dwUserToken, &EventData);
}
else
{
CSS_CALL_REJECTED EventData;
pCallObject->bCallState = CALLSTATE_NULL;
// populate the event data struct.
EventData.bRejectReason = pFacilityASN->bReason;
EventData.ConferenceID = pFacilityASN->ConferenceIDPresent ?
pFacilityASN->ConferenceID : pCallObject->ConferenceID;
EventData.pAlternateAddr = &(pFacilityASN->AlternativeAddr);
if (!(pFacilityASN->NonStandardDataPresent) ||
(pFacilityASN->NonStandardData.sData.wOctetStringLength == 0) ||
(pFacilityASN->NonStandardData.sData.pOctetString == NULL))
{
EventData.pNonStandardData = NULL;
}
else
{
EventData.pNonStandardData = &(pFacilityASN->NonStandardData);
}
result = pCallObject->Callback((BYTE)Q931_CALL_REJECTED,
pCallObject->hQ931Call, pCallObject->dwListenToken,
pCallObject->dwUserToken, &EventData);
}
return CS_OK;
}
//====================================================================================
//====================================================================================
CS_STATUS
Q931SendReleaseCompleteMessage(
P_CALL_OBJECT pCallObject,
BYTE bRejectReason,
PCC_CONFERENCEID pConferenceID,
PCC_ADDR pAlternateAddr,
PCC_NONSTANDARDDATA pNonStandardData)
{
CS_STATUS result = CS_OK;
HQ931CALL hQ931Call = pCallObject->hQ931Call;
// since this call is going away, mark the call object for deletion so any other
// threads attempting to use this object will fail to get a lock on it.
CallObjectMarkForDelete(hQ931Call);
if((bRejectReason == CC_REJECT_ROUTE_TO_GATEKEEPER) ||
(bRejectReason == CC_REJECT_CALL_FORWARDED) ||
(bRejectReason == CC_REJECT_ROUTE_TO_MC))
{
// send the FACILITY message to the peer to reject the call.
DWORD CodedLengthASN;
BYTE *CodedPtrASN;
HRESULT ResultASN = CS_OK;
CC_ADDR AltAddr;
MakeBinaryADDR(pAlternateAddr, &AltAddr);
ResultASN = Q931FacilityEncodeASN(pNonStandardData,
(pAlternateAddr ? &AltAddr : NULL),
bRejectReason, pConferenceID, NULL, &pCallObject->World,
&CodedPtrASN, &CodedLengthASN, &pCallObject->CallIdentifier);
if ((ResultASN != CS_OK) || (CodedLengthASN == 0) ||
(CodedPtrASN == NULL))
{
ISRERROR(ghISRInst, "Q931FacilityEncodeASN() failed, nothing to send.", 0L);
if (CodedPtrASN != NULL)
{
Q931FreeEncodedBuffer(&pCallObject->World, CodedPtrASN);
}
result = CS_INTERNAL_ERROR;
}
else
{
DWORD CodedLengthPDU;
BYTE *CodedPtrPDU;
BINARY_STRING UserUserData;
HRESULT ResultEncode = CS_OK;
WORD wCRV;
if (pCallObject->fIsCaller)
{
wCRV = (WORD)(pCallObject->wCRV & 0x7FFF);
}
else
{
wCRV = (WORD)(pCallObject->wCRV | 0x8000);
}
UserUserData.length = (WORD)CodedLengthASN;
UserUserData.ptr = CodedPtrASN;
ResultEncode = Q931FacilityEncodePDU(wCRV,
&UserUserData, &CodedPtrPDU, &CodedLengthPDU);
if (CodedPtrASN != NULL)
{
Q931FreeEncodedBuffer(&pCallObject->World, CodedPtrASN);
}
if ((ResultEncode != CS_OK) || (CodedLengthPDU == 0) ||
(CodedPtrPDU == NULL))
{
ISRERROR(ghISRInst, "Q931FacilityEncodePDU() failed, nothing to send.", 0L);
if (CodedPtrPDU != NULL)
{
MemFree(CodedPtrPDU);
}
result = CS_INTERNAL_ERROR;
}
else
{
result = Q931SendMessage(pCallObject, CodedPtrPDU, CodedLengthPDU, FALSE);
}
}
}
else
{
// send the RELEASE COMPLETE message to the peer to reject call.
DWORD CodedLengthASN;
BYTE *CodedPtrASN;
HRESULT ResultASN = CS_OK;
BYTE bReasonUU = bRejectReason;
BYTE *pbReasonUU = &bReasonUU;
switch (bReasonUU)
{
case CC_REJECT_NO_BANDWIDTH: //noBandwidth_chosen
case CC_REJECT_GATEKEEPER_RESOURCES: // gatekeeperResources_chosen
case CC_REJECT_UNREACHABLE_DESTINATION: // unreachableDestination_chosen
case CC_REJECT_DESTINATION_REJECTION: // destinationRejection_chosen
case CC_REJECT_INVALID_REVISION: // ReleaseCompleteReason_invalidRevision_chosen
case CC_REJECT_NO_PERMISSION: // noPermission_chosen
case CC_REJECT_UNREACHABLE_GATEKEEPER: // unreachableGatekeeper_chosen
case CC_REJECT_GATEWAY_RESOURCES: // gatewayResources_chosen
case CC_REJECT_BAD_FORMAT_ADDRESS: // badFormatAddress_chosen
case CC_REJECT_ADAPTIVE_BUSY: // adaptiveBusy_chosen
case CC_REJECT_IN_CONF: // inConf_chosen
case CC_REJECT_UNDEFINED_REASON: // ReleaseCompleteReason_undefinedReason_chosen
case CC_REJECT_INTERNAL_ERROR: // will be mapped to ReleaseCompleteReason_undefinedReason_chosen
case CC_REJECT_NORMAL_CALL_CLEARING: // will be mapped to ReleaseCompleteReason_undefinedReason_chosen
case CC_REJECT_USER_BUSY: // will be mapped to inConf_chosen
case CC_REJECT_CALL_DEFLECTION: // facilityCallDeflection_chosen
case CC_REJECT_SECURITY_DENIED: // securityDenied_chosen
break;
default:
pbReasonUU = NULL;
break;
}
ResultASN = Q931ReleaseCompleteEncodeASN(pNonStandardData,
pConferenceID, pbReasonUU, &pCallObject->World,
&CodedPtrASN, &CodedLengthASN, &pCallObject->CallIdentifier);
if ((ResultASN != CS_OK) || (CodedLengthASN == 0) ||
(CodedPtrASN == NULL))
{
ISRERROR(ghISRInst, "Q931ReleaseCompleteEncodeASN() failed, nothing to send.", 0L);
if (CodedPtrASN != NULL)
{
Q931FreeEncodedBuffer(&pCallObject->World, CodedPtrASN);
}
result = CS_INTERNAL_ERROR;
}
else
{
DWORD CodedLengthPDU;
BYTE *CodedPtrPDU;
BINARY_STRING UserUserData;
HRESULT ResultEncode = CS_OK;
BYTE bCause = 0;
BYTE *pbCause = &bCause;
WORD wCRV;
if (pCallObject->fIsCaller)
{
wCRV = (WORD)(pCallObject->wCRV & 0x7FFF);
}
else
{
wCRV = (WORD)(pCallObject->wCRV | 0x8000);
}
UserUserData.length = (WORD)CodedLengthASN;
UserUserData.ptr = CodedPtrASN;
switch (bRejectReason)
{
case CC_REJECT_NORMAL_CALL_CLEARING:
bCause = CAUSE_VALUE_NORMAL_CLEAR;
break;
case CC_REJECT_USER_BUSY:
bCause = CAUSE_VALUE_USER_BUSY;
break;
case CC_REJECT_SECURITY_DENIED:
bCause = CAUSE_VALUE_SECURITY_DENIED;
break;
case CC_REJECT_NO_ANSWER:
bCause = CAUSE_VALUE_NO_ANSWER;
break;
case CC_REJECT_NOT_IMPLEMENTED:
bCause = CAUSE_VALUE_NOT_IMPLEMENTED;
break;
case CC_REJECT_MANDATORY_IE_MISSING:
bCause = CAUSE_VALUE_IE_MISSING;
break;
case CC_REJECT_INVALID_IE_CONTENTS:
bCause = CAUSE_VALUE_IE_CONTENTS;
break;
case CC_REJECT_TIMER_EXPIRED:
bCause = CAUSE_VALUE_TIMER_EXPIRED;
break;
default:
pbCause = NULL;
break;
}
ResultEncode = Q931ReleaseCompleteEncodePDU(wCRV,
pbCause, &UserUserData,
&CodedPtrPDU, &CodedLengthPDU);
if (CodedPtrASN != NULL)
{
Q931FreeEncodedBuffer(&pCallObject->World, CodedPtrASN);
}
if ((ResultEncode != CS_OK) || (CodedLengthPDU == 0) ||
(CodedPtrPDU == NULL))
{
ISRERROR(ghISRInst, "Q931ReleaseCompleteEncodePDU() failed, nothing to send.", 0L);
if (CodedPtrPDU != NULL)
{
MemFree(CodedPtrPDU);
}
result = CS_INTERNAL_ERROR;
}
else
{
result = Q931SendMessage(pCallObject, CodedPtrPDU, CodedLengthPDU, FALSE);
}
}
}
pCallObject->bCallState = CALLSTATE_NULL;
if (result != CS_OK)
{
return result;
}
return CS_OK;
}
//====================================================================================
//====================================================================================
CS_STATUS
Q931SendStatusMessage(
P_CALL_OBJECT pCallObject,
Q931MESSAGE *pMessage,
BYTE bCause)
{
CS_STATUS result = CS_OK;
DWORD CodedLengthPDU;
BYTE *CodedPtrPDU;
HRESULT EncodePDU = CS_OK;
int nError = 0;
HQ931CALL hQ931Call = pCallObject->hQ931Call;
WORD wCRV;
if (pCallObject->fIsCaller)
{
wCRV = (WORD)(pCallObject->wCRV & 0x7FFF);
}
else
{
wCRV = (WORD)(pCallObject->wCRV | 0x8000);
}
EncodePDU = Q931StatusEncodePDU(wCRV, NULL, bCause,
pCallObject->bCallState, &CodedPtrPDU, &CodedLengthPDU);
if ((EncodePDU != CS_OK) || (CodedLengthPDU == 0) ||
(CodedPtrPDU == NULL))
{
ISRERROR(ghISRInst, "Q931StatusEncodePDU() failed, nothing to send.", 0L);
if (CodedPtrPDU != NULL)
{
MemFree(CodedPtrPDU);
}
result = CS_INTERNAL_ERROR;
}
else
{
result = Q931SendMessage(pCallObject, CodedPtrPDU, CodedLengthPDU, TRUE);
if(CallObjectValidate(hQ931Call) != CS_OK)
return(CS_INTERNAL_ERROR);
}
return(result);
}
//====================================================================================
//====================================================================================
CS_STATUS
Q931SendProceedingMessage(
HQ931CALL hQ931Call,
WORD wCallReference,
PCC_ENDPOINTTYPE pDestinationEndpointType,
PCC_NONSTANDARDDATA pNonStandardData)
{
CS_STATUS result = CS_OK;
DWORD CodedLengthASN;
BYTE *CodedPtrASN;
HRESULT ResultASN = CS_OK;
DWORD dwPhysicalId = INVALID_PHYS_ID;
P_CALL_OBJECT pCallObject = NULL;
if ((CallObjectLock(hQ931Call, &pCallObject) != CS_OK) || (pCallObject == NULL))
{
ISRERROR(ghISRInst, "CallObjectLock() returned error", 0L);
return CS_SUBSYSTEM_FAILURE;
}
dwPhysicalId = pCallObject->dwPhysicalId;
// first build the ASN portion of the message (user to user part)
ResultASN = Q931ProceedingEncodeASN(
pNonStandardData,
NULL, // No H245 address.
pDestinationEndpointType, // EndpointType information.
&pCallObject->World,
&CodedPtrASN,
&CodedLengthASN,
&pCallObject->CallIdentifier);
if ((ResultASN != CS_OK) || (CodedLengthASN == 0) ||
(CodedPtrASN == NULL))
{
ISRERROR(ghISRInst, "Q931ProceedingEncodeASN() failed, nothing to send.", 0L);
if (CodedPtrASN != NULL)
{
Q931FreeEncodedBuffer(&pCallObject->World, CodedPtrASN);
}
result = CS_INTERNAL_ERROR;
}
else
{
// now build the rest of the message
DWORD CodedLengthPDU;
BYTE *CodedPtrPDU;
BINARY_STRING UserUserData;
HRESULT ResultEncode = CS_OK;
WORD wCRV = (WORD)(wCallReference | 0x8000);
UserUserData.length = (WORD)CodedLengthASN;
UserUserData.ptr = CodedPtrASN;
ResultEncode = Q931ProceedingEncodePDU(wCRV,
&UserUserData, &CodedPtrPDU, &CodedLengthPDU);
if (CodedPtrASN != NULL)
{
Q931FreeEncodedBuffer(&pCallObject->World, CodedPtrASN);
}
if ((ResultEncode != CS_OK) || (CodedLengthPDU == 0) ||
(CodedPtrPDU == NULL))
{
ISRERROR(ghISRInst, "Q931ProceedingEncodePDU() failed, nothing to send.", 0L);
if (CodedPtrPDU != NULL)
{
MemFree(CodedPtrPDU);
}
result = CS_INTERNAL_ERROR;
}
else
{
result = Q931SendMessage(pCallObject, CodedPtrPDU, CodedLengthPDU, TRUE);
if (CallObjectValidate(hQ931Call) != CS_OK)
return(CS_INTERNAL_ERROR);
}
}
CallObjectUnlock(pCallObject);
return(result);
}
//====================================================================================
//====================================================================================
CS_STATUS
Q931SendPDU(HQ931CALL hQ931Call, BYTE* CodedPtrPDU, DWORD CodedLengthPDU)
{
CS_STATUS result = CS_OK;
HRESULT TempResult;
P_CALL_OBJECT pCallObject = NULL;
if ((CallObjectLock(hQ931Call, &pCallObject) != CS_OK) ||
(pCallObject == NULL))
{
ISRERROR(ghISRInst, "CallObjectLock() returned error", 0L);
return CS_SUBSYSTEM_FAILURE;
}
TempResult = Q931SendMessage(pCallObject, CodedPtrPDU, CodedLengthPDU, TRUE);
if (CallObjectValidate(hQ931Call) != CS_OK)
return(CS_INTERNAL_ERROR);
if(FAILED(TempResult))
{
CSS_CALL_FAILED EventData;
EventData.error = TempResult;
if ((pCallObject->bCallState == CALLSTATE_ACTIVE) &&
(pCallObject->bResolved))
{
pCallObject->Callback(Q931_CALL_CONNECTION_CLOSED,
pCallObject->hQ931Call, pCallObject->dwListenToken,
pCallObject->dwUserToken, NULL);
}
else
{
pCallObject->Callback(Q931_CALL_FAILED,
pCallObject->hQ931Call, pCallObject->dwListenToken,
pCallObject->dwUserToken, &EventData);
}
if (CallObjectValidate(hQ931Call) == CS_OK)
{
DWORD dwId = pCallObject->dwPhysicalId;
if ((pCallObject->bCallState != CALLSTATE_ACTIVE) ||
(!pCallObject->bResolved))
{
CallObjectDestroy(pCallObject);
pCallObject = NULL;
}
linkLayerShutdown(dwId);
if (pCallObject)
{
pCallObject->bConnected = FALSE;
}
}
return TempResult;
}
CallObjectUnlock(pCallObject);
return CS_OK;
}
//====================================================================================
//====================================================================================
CS_STATUS
Q931OnCallStatusEnquiry(
P_CALL_OBJECT pCallObject,
Q931MESSAGE *pMessage)
{
CS_STATUS SendStatus;
SendStatus = Q931SendStatusMessage(pCallObject, pMessage,
CAUSE_VALUE_ENQUIRY_RESPONSE);
return SendStatus;
}
//====================================================================================
//====================================================================================
void
Q931SendComplete(DWORD_PTR instance, HRESULT msg, PBYTE buf, DWORD length)
{
HQ931CALL hQ931Call = (HQ931CALL)instance;
P_CALL_OBJECT pCallObject = NULL;
ISRTRACE(ghISRInst, "Entering Q931SendComplete()...", 0L);
if (buf != NULL)
{
MemFree(buf);
}
if (FAILED(msg))
{
// shut down link layer; report failure to client
CSS_CALL_FAILED EventData;
ISRERROR(ghISRInst, "error in datalinkSendRequest()", 0L);
if ((CallObjectLock(hQ931Call, &pCallObject) != CS_OK) || (pCallObject == NULL))
{
ISRERROR(ghISRInst, "CallObjectLock() returned error", 0L);
return;
}
EventData.error = msg;
if ((pCallObject->bCallState == CALLSTATE_ACTIVE) &&
(pCallObject->bResolved))
{
pCallObject->Callback(Q931_CALL_CONNECTION_CLOSED,
pCallObject->hQ931Call, pCallObject->dwListenToken,
pCallObject->dwUserToken, NULL);
}
else
{
pCallObject->Callback(Q931_CALL_FAILED,
pCallObject->hQ931Call, pCallObject->dwListenToken,
pCallObject->dwUserToken, &EventData);
}
if (CallObjectValidate(hQ931Call) == CS_OK)
{
DWORD dwId = pCallObject->dwPhysicalId;
if ((pCallObject->bCallState != CALLSTATE_ACTIVE) ||
(!pCallObject->bResolved))
{
CallObjectDestroy(pCallObject);
pCallObject = NULL;
}
linkLayerShutdown(dwId);
if (pCallObject)
{
pCallObject->bConnected = FALSE;
}
}
return;
}
return;
}
//====================================================================================
//====================================================================================
static DWORD
PostReceiveBuffer(DWORD dwPhysicalId, BYTE *buf)
{
if (buf == NULL)
{
buf = MemAlloc(RECEIVE_BUFFER_SIZE);
}
return datalinkReceiveRequest(dwPhysicalId, buf, RECEIVE_BUFFER_SIZE);
}
//====================================================================================
//====================================================================================
void
OnReceiveCallback(DWORD_PTR instance, HRESULT message, Q931MESSAGE *pMessage, BYTE *buf, DWORD nbytes)
{
HQ931CALL hQ931Call = (HQ931CALL)instance;
P_CALL_OBJECT pCallObject = NULL;
DWORD dwPhysicalId;
ISRTRACE(ghISRInst, "Entering ReceiveCallback()...", 0L);
if ((CallObjectLock(hQ931Call, &pCallObject) != CS_OK) || (pCallObject == NULL))
{
if (buf)
{
MemFree(buf);
}
ISRTRACE(ghISRInst, "Call Object no longer available:", (DWORD)hQ931Call);
return;
}
if (message == LINK_RECV_DATA)
{
HRESULT Result = CS_OK;
if ((buf == NULL) || (nbytes == 0))
{
ISRERROR(ghISRInst, "Empty buffer received as data.", 0L);
CallObjectUnlock(pCallObject);
return;
}
// This block is the Q931 call re-connect implementation:
// if the object related to the incoming message is not yet resolved...
if (pCallObject->bResolved == FALSE)
{
// try to resolve the object.
HQ931CALL hFoundCallObject;
P_CALL_OBJECT pFoundCallObject = NULL;
// If found another object with matching CRV/Addr...
if (CallObjectFind(&hFoundCallObject, pCallObject->wCRV,
&(pCallObject->PeerConnectAddr)) &&
((CallObjectLock(hFoundCallObject, &pFoundCallObject) == CS_OK) &&
(pFoundCallObject != NULL)))
{
// friendly channel close of the pFoundCallObject.
Q931SendReleaseCompleteMessage(pFoundCallObject,
CC_REJECT_UNDEFINED_REASON, &(pFoundCallObject->ConferenceID), NULL, NULL);
// unlock the call object before calling shutdown
CallObjectUnlock(pFoundCallObject);
linkLayerShutdown(pFoundCallObject->dwPhysicalId);
if((CallObjectLock(hFoundCallObject, &pFoundCallObject) != CS_OK) ||
(pFoundCallObject == NULL))
return;
// assign the new dwPhysicalId to found object.
pFoundCallObject->dwPhysicalId = pCallObject->dwPhysicalId;
// new object should be destroyed.
CallObjectDestroy(pCallObject);
pCallObject = pFoundCallObject;
}
else
{
// The call is a newly established call, so resolve it now.
pCallObject->bResolved = TRUE;
}
}
Result = Q931ParseMessage((BYTE *)buf, nbytes, pMessage);
#if (defined(_DEBUG) || defined(PCS_COMPLIANCE))
InteropOutput(Q931Logger, buf, nbytes, Q931LOG_RECEIVED_PDU);
#endif
if (Result != CS_OK)
{
Result = Q931SendStatusMessage(pCallObject, pMessage,
CAUSE_VALUE_INVALID_MSG);
ISRERROR(ghISRInst, "Q931ParseMessage(): failed.", 0L);
if(CallObjectValidate(hQ931Call) != CS_OK)
{
if (buf)
{
MemFree(buf);
}
return;
}
dwPhysicalId = pCallObject->dwPhysicalId;
CallObjectUnlock(pCallObject);
PostReceiveBuffer(dwPhysicalId, buf);
return;
}
if (pMessage->Shift.Present)
{
ISRERROR(ghISRInst, "Shift present in message: dropped.", 0L);
dwPhysicalId = pCallObject->dwPhysicalId;
CallObjectUnlock(pCallObject);
PostReceiveBuffer(dwPhysicalId, buf);
return;
}
// If a hooking procedure has been installed,
// give it first shot at acting on the received PDU.
// If it returns TRUE, then processing is finished.
if (gReceivePDUHookProc)
{
BOOL bHookProcessedMessage;
bHookProcessedMessage = gReceivePDUHookProc(pMessage,
pCallObject->hQ931Call, pCallObject->dwListenToken,
pCallObject->dwUserToken);
if (bHookProcessedMessage)
{
if (CallObjectValidate(hQ931Call) == CS_OK)
{
dwPhysicalId = pCallObject->dwPhysicalId;
CallObjectUnlock(pCallObject);
PostReceiveBuffer(dwPhysicalId, buf);
}
return;
}
}
// Message now contains the values of the Q931 PDU elements...
switch (pMessage->MessageType)
{
case SETUPMESSAGETYPE:
{
Q931_SETUP_ASN SetupASN;
if (!pMessage->UserToUser.Present || (pMessage->UserToUser.UserInformationLength == 0))
{
ISRERROR(ghISRInst, "ReceiveCallback(): Message is missing ASN.1 UserUser data...", 0L);
dwPhysicalId = pCallObject->dwPhysicalId;
CallObjectUnlock(pCallObject);
PostReceiveBuffer(dwPhysicalId, buf);
return;
}
ISRTRACE(ghISRInst, "ReceiveCallback(): received Setup message...", 0L);
Result = Q931SetupParseASN(&pCallObject->World, pMessage->UserToUser.UserInformation,
pMessage->UserToUser.UserInformationLength, &SetupASN);
if (Result == CS_OPTION_NOT_IMPLEMENTED)
{
//... maybe callback callcont in later drop.
// initiate a disconnect sequence from the caller side.
if (Q931SendReleaseCompleteMessage(pCallObject,
CC_REJECT_TIMER_EXPIRED, NULL, NULL, NULL) != CS_OK)
{
// nothing to do if this fails.
}
dwPhysicalId = pCallObject->dwPhysicalId;
CallObjectDestroy(pCallObject);
linkLayerShutdown(dwPhysicalId);
if (buf)
{
MemFree(buf);
buf = NULL;
}
return;
}
if (Result != CS_OK)
{
ISRERROR(ghISRInst, "ReceiveCallback(): Unable to parse ASN.1 data.", 0L);
break;
}
// The "CallerAddr is not passed in the PDU, so the
// only valuable addr to use is the connection addr
// passed from the link layer and saved into the call
// object at connect-time.
SetupASN.CallerAddrPresent = TRUE;
SetupASN.CallerAddr = pCallObject->PeerConnectAddr;
// The "CalleeAddr" which is passed in the PDU is ignored
// by the ASN parser, and supplied by the link layer
// instead and saved into the call object at connect-time.
// here, this address is used as the callee addr.
SetupASN.CalleeAddrPresent = TRUE;
SetupASN.CalleeAddr = pCallObject->LocalAddr;
Result = Q931OnCallSetup(pCallObject, pMessage, &SetupASN);
_FreeSetupASN(&SetupASN);
}
break;
case RELEASECOMPLMESSAGETYPE:
{
Q931_RELEASE_COMPLETE_ASN ReleaseCompleteASN;
if (!pMessage->UserToUser.Present || (pMessage->UserToUser.UserInformationLength == 0))
{
ISRERROR(ghISRInst, "ReceiveCallback(): Message is missing ASN.1 UserUser data...", 0L);
dwPhysicalId = pCallObject->dwPhysicalId;
CallObjectUnlock(pCallObject);
PostReceiveBuffer(dwPhysicalId, buf);
return;
}
ISRTRACE(ghISRInst, "ReceiveCallback(): received ReleaseComplete message...", 0L);
Result = Q931ReleaseCompleteParseASN(&pCallObject->World,
pMessage->UserToUser.UserInformation,
pMessage->UserToUser.UserInformationLength, &ReleaseCompleteASN);
if (Result != CS_OK)
{
ISRERROR(ghISRInst, "ReceiveCallback(): Unable to parse ASN.1 data.", 0L);
break;
}
Result = Q931OnCallReleaseComplete(pCallObject, pMessage, &ReleaseCompleteASN);
if (CallObjectValidate(hQ931Call) == CS_OK)
{
dwPhysicalId = pCallObject->dwPhysicalId;
CallObjectDestroy(pCallObject);
linkLayerShutdown(dwPhysicalId);
}
MemFree(buf);
_FreeReleaseCompleteASN(&ReleaseCompleteASN);
return;
}
break;
case FACILITYMESSAGETYPE:
{
Q931_FACILITY_ASN FacilityASN;
if (!pMessage->UserToUser.Present || (pMessage->UserToUser.UserInformationLength == 0))
{
ISRERROR(ghISRInst, "ReceiveCallback(): Message is missing ASN.1 UserUser data...", 0L);
dwPhysicalId = pCallObject->dwPhysicalId;
CallObjectUnlock(pCallObject);
PostReceiveBuffer(dwPhysicalId, buf);
return;
}
ISRTRACE(ghISRInst, "ReceiveCallback(): received Facility message...", 0L);
Result = Q931FacilityParseASN(&pCallObject->World, pMessage->UserToUser.UserInformation,
pMessage->UserToUser.UserInformationLength, &FacilityASN);
if (Result != CS_OK)
{
ISRERROR(ghISRInst, "ReceiveCallback(): Unable to parse ASN.1 data.", 0L);
break;
}
// initiate a disconnect sequence from the caller side.
Q931SendReleaseCompleteMessage(pCallObject,
CC_REJECT_CALL_DEFLECTION, NULL, NULL, NULL);
Result = Q931OnCallFacility(pCallObject, pMessage, &FacilityASN);
_FreeFacilityASN(&FacilityASN);
dwPhysicalId = pCallObject->dwPhysicalId;
CallObjectDestroy(pCallObject);
linkLayerShutdown(dwPhysicalId);
MemFree(buf);
return;
}
break;
case CONNECTMESSAGETYPE:
{
Q931_CONNECT_ASN ConnectASN;
if (!pMessage->UserToUser.Present || (pMessage->UserToUser.UserInformationLength == 0))
{
ISRERROR(ghISRInst, "ReceiveCallback(): Message is missing ASN.1 UserUser data...", 0L);
dwPhysicalId = pCallObject->dwPhysicalId;
CallObjectUnlock(pCallObject);
PostReceiveBuffer(dwPhysicalId, buf);
return;
}
ISRTRACE(ghISRInst, "ReceiveCallback(): received Connect message...", 0L);
Result = Q931ConnectParseASN(&pCallObject->World, pMessage->UserToUser.UserInformation,
pMessage->UserToUser.UserInformationLength, &ConnectASN);
if (Result != CS_OK)
{
ISRERROR(ghISRInst, "ReceiveCallback(): Unable to parse ASN.1 data.", 0L);
break;
}
Result = Q931OnCallConnect(pCallObject, pMessage, &ConnectASN);
_FreeConnectASN(&ConnectASN);
}
break;
case PROCEEDINGMESSAGETYPE:
{
Q931_CALL_PROCEEDING_ASN ProceedingASN;
ISRTRACE(ghISRInst, "ReceiveCallback(): received Proceeding message...", 0L);
if (!pMessage->UserToUser.Present || (pMessage->UserToUser.UserInformationLength == 0))
{
Result = Q931OnCallProceeding(pCallObject, pMessage, NULL);
}
else
{
Result = Q931ProceedingParseASN(&pCallObject->World, pMessage->UserToUser.UserInformation,
pMessage->UserToUser.UserInformationLength, &ProceedingASN);
if (Result != CS_OK)
{
ISRERROR(ghISRInst, "ReceiveCallback(): Unable to parse ASN.1 data.", 0L);
break;
}
Result = Q931OnCallProceeding(pCallObject, pMessage, &ProceedingASN);
_FreeProceedingASN(&ProceedingASN);
}
}
break;
case ALERTINGMESSAGETYPE:
{
Q931_ALERTING_ASN AlertingASN;
ISRTRACE(ghISRInst, "ReceiveCallback(): received Alerting message...", 0L);
if (!pMessage->UserToUser.Present || (pMessage->UserToUser.UserInformationLength == 0))
{
Result = Q931OnCallAlerting(pCallObject, pMessage, NULL);
}
else
{
Result = Q931AlertingParseASN(&pCallObject->World, pMessage->UserToUser.UserInformation,
pMessage->UserToUser.UserInformationLength, &AlertingASN);
if (Result != CS_OK)
{
ISRERROR(ghISRInst, "ReceiveCallback(): Unable to parse ASN.1 data.", 0L);
break;
}
Result = Q931OnCallAlerting(pCallObject, pMessage, &AlertingASN);
_FreeAlertingASN(&AlertingASN);
}
}
break;
case RELEASEMESSAGETYPE:
case STATUSMESSAGETYPE:
ISRWARNING(ghISRInst, "ReceiveCallback(): message not yet supported.", 0L);
break;
case STATUSENQUIRYMESSAGETYPE:
ISRWARNING(ghISRInst, "ReceiveCallback(): message not yet supported.", 0L);
Result = Q931OnCallStatusEnquiry(pCallObject, pMessage);
break;
default:
ISRERROR(ghISRInst, "ReceiveCallback(): unknown message received.", 0L);
break;
}
// re-validate the call object:
if (CallObjectValidate(hQ931Call) == CS_OK)
{
dwPhysicalId = pCallObject->dwPhysicalId;
CallObjectUnlock(pCallObject);
PostReceiveBuffer(dwPhysicalId, buf);
if ((CallObjectLock(hQ931Call, &pCallObject) != CS_OK) || (pCallObject == NULL))
return;
}
else
{
if (buf)
{
MemFree(buf);
}
return;
}
if (Result == CS_INCOMPATIBLE_VERSION)
{
// initiate a disconnect sequence from the caller side.
Q931SendReleaseCompleteMessage(pCallObject,
CC_REJECT_INVALID_REVISION, NULL, NULL, NULL);
dwPhysicalId = pCallObject->dwPhysicalId;
CallObjectDestroy(pCallObject);
linkLayerShutdown(dwPhysicalId);
return;
}
if (Result == CS_MANDATORY_IE_MISSING)
{
Q931SendStatusMessage(pCallObject, pMessage,
CAUSE_VALUE_IE_MISSING);
}
else if (Result == CS_BAD_IE_CONTENT)
{
Q931SendStatusMessage(pCallObject, pMessage,
CAUSE_VALUE_IE_CONTENTS);
}
}
else if (message == LINK_RECV_CLOSED)
{
// Socket closed
if (buf)
{
MemFree(buf);
}
pCallObject->Callback(Q931_CALL_CONNECTION_CLOSED, pCallObject->hQ931Call,
pCallObject->dwListenToken,
pCallObject->dwUserToken, NULL);
if (CallObjectValidate(hQ931Call) == CS_OK)
{
dwPhysicalId = pCallObject->dwPhysicalId;
pCallObject->bConnected = FALSE;
CallObjectDestroy(pCallObject);
linkLayerShutdown(dwPhysicalId);
}
return;
}
else if (buf)
{
// unknown condition?
MemFree(buf);
}
if (CallObjectValidate(hQ931Call) == CS_OK)
{
CallObjectUnlock(pCallObject);
}
return;
}
//====================================================================================
//====================================================================================
void
Q931ReceiveCallback(DWORD_PTR instance, HRESULT message, BYTE *buf, DWORD nbytes)
{
Q931MESSAGE *pMessage = NULL;
if (message == LINK_RECV_DATA)
{
pMessage = (Q931MESSAGE *)MemAlloc(sizeof(Q931MESSAGE));
if (pMessage == NULL)
{
ISRERROR(ghISRInst, "Not enough memory to process Q931 message.", 0L);
// something more should be done here to indicate SERIOUS error...
return;
}
}
OnReceiveCallback(instance, message, pMessage, buf, nbytes);
if (pMessage)
{
MemFree(pMessage);
}
return;
}
//====================================================================================
//====================================================================================
void
Q931ConnectCallback(DWORD_PTR dwInstance, HRESULT dwMessage,
CC_ADDR *pLocalAddr, CC_ADDR *pPeerAddr)
{
HQ931CALL hQ931Call = (HQ931CALL)dwInstance;
P_CALL_OBJECT pCallObject = NULL;
HRESULT TempResult;
DWORD dwPhysicalId;
ISRTRACE(ghISRInst, "Entering Q931ConnectCallback()...", 0L);
if ((CallObjectLock(hQ931Call, &pCallObject) != CS_OK) || (pCallObject == NULL))
{
ISRERROR(ghISRInst, "CallObjectLock() returned error", 0L);
return;
}
pCallObject->bConnected = TRUE;
if (FAILED(dwMessage))
{
// shut down link layer; report failure to client
CSS_CALL_FAILED EventData;
ISRERROR(ghISRInst, "error in connect", 0L);
EventData.error = dwMessage;
pCallObject->Callback(Q931_CALL_FAILED, pCallObject->hQ931Call,
pCallObject->dwListenToken,
pCallObject->dwUserToken, &EventData);
if (CallObjectValidate(hQ931Call) == CS_OK)
{
DWORD dwId = pCallObject->dwPhysicalId;
CallObjectDestroy(pCallObject);
linkLayerShutdown(dwId);
}
return;
}
if (dwMessage != LINK_CONNECT_COMPLETE)
{
ISRERROR(ghISRInst, "unexpected connect callback", 0L);
CallObjectUnlock(pCallObject);
return;
}
if (pCallObject->bCallState == CALLSTATE_NULL)
{
pCallObject->bCallState = CALLSTATE_INITIATED;
}
ASSERT(pLocalAddr);
pCallObject->LocalAddr = *pLocalAddr;
ASSERT(pPeerAddr);
pCallObject->PeerConnectAddr = *pPeerAddr;
// if the user specified a binary source address with address = 0,
// fill in the address with the local address and send.
if ((pCallObject->SourceAddrPresent) &&
(pCallObject->SourceAddr.nAddrType == CC_IP_BINARY) &&
(!pCallObject->SourceAddr.Addr.IP_Binary.dwAddr))
{
pCallObject->SourceAddr = *pLocalAddr;
}
if ((pCallObject->fIsCaller) &&
(pCallObject->bCallState == CALLSTATE_INITIATED))
{
// send the SETUP message to the peer.
DWORD CodedLengthASN;
BYTE *CodedPtrASN;
HRESULT ResultASN = CS_OK;
DWORD CodedLengthPDU;
BYTE *CodedPtrPDU;
HRESULT ResultPDU = CS_OK;
int nError = 0;
BOOL ResultSend = FALSE;
BINARY_STRING UserUserData;
PCC_VENDORINFO pVendorInfo = NULL;
CC_NONSTANDARDDATA *pNonStandardData = NULL;
DWORD dwId;
if (pCallObject->VendorInfoPresent)
{
pVendorInfo = &(pCallObject->VendorInfo);
}
if (pCallObject->NonStandardDataPresent)
{
pNonStandardData = &(pCallObject->NonStandardData);
}
// if there is a special callee alias list, load the calledparty#.
if (pCallObject->szCalledPartyNumber[0] == 0 &&
pCallObject->pCalleeAliasList != NULL &&
pCallObject->pCalleeAliasList->wCount == 1 &&
pCallObject->pCalleeAliasList->pItems[0].wType == CC_ALIAS_H323_PHONE &&
pCallObject->pCalleeAliasList->pItems[0].wDataLength > 0 &&
pCallObject->pCalleeAliasList->pItems[0].pData != NULL)
{
PCC_ALIASITEM pItem = &pCallObject->pCalleeAliasList->pItems[0];
WCHAR szWidePartyNumber[CC_MAX_PARTY_NUMBER_LEN + 1];
memset(szWidePartyNumber, 0 , CC_MAX_PARTY_NUMBER_LEN + 1);
if (pItem->wPrefixLength > 0 && pItem->pPrefix != NULL)
{
ASSERT((pItem->wPrefixLength + pItem->wDataLength +1) <= (sizeof(szWidePartyNumber)/sizeof(szWidePartyNumber[0])));
memcpy(&szWidePartyNumber[0],
pItem->pPrefix,
(pItem->wPrefixLength) * sizeof(WCHAR));
memcpy(&szWidePartyNumber[pItem->wPrefixLength],
pItem->pData,
pItem->wDataLength * sizeof(WCHAR));
}
else
{
ASSERT((pItem->wDataLength +1) <= (sizeof(szWidePartyNumber)/sizeof(szWidePartyNumber[0])));
memcpy(szWidePartyNumber,
pCallObject->pCalleeAliasList->pItems[0].pData,
pItem->wDataLength * sizeof(WCHAR));
}
WideCharToMultiByte(CP_ACP, 0, szWidePartyNumber,
pItem->wPrefixLength + pItem->wDataLength * sizeof(WCHAR),
pCallObject->szCalledPartyNumber,
sizeof(pCallObject->szCalledPartyNumber), NULL, NULL);
}
// may wish to pass alias parms later instead of NULL, NULL.
ResultASN = Q931SetupEncodeASN(pNonStandardData,
pCallObject->SourceAddrPresent ? &(pCallObject->SourceAddr) : NULL,
pCallObject->PeerCallAddrPresent ? &(pCallObject->PeerCallAddr) : NULL, // callee
pCallObject->wGoal,
pCallObject->wCallType,
pCallObject->bCallerIsMC,
&(pCallObject->ConferenceID),
pCallObject->pCallerAliasList,
pCallObject->pCalleeAliasList,
pCallObject->pExtraAliasList,
pCallObject->pExtensionAliasItem,
pVendorInfo,
pCallObject->bIsTerminal,
pCallObject->bIsGateway,
&pCallObject->World,
&CodedPtrASN,
&CodedLengthASN,
&pCallObject->CallIdentifier);
if ((ResultASN != CS_OK) || (CodedLengthASN == 0) ||
(CodedPtrASN == NULL))
{
CSS_CALL_FAILED EventData;
ISRERROR(ghISRInst, "Q931SetupEncodeASN() failed, nothing to send.", 0L);
if (CodedPtrASN != NULL)
{
Q931FreeEncodedBuffer(&pCallObject->World, CodedPtrASN);
}
EventData.error = CS_INTERNAL_ERROR;
dwId = pCallObject->dwPhysicalId;
pCallObject->Callback(Q931_CALL_FAILED, pCallObject->hQ931Call,
pCallObject->dwListenToken,
pCallObject->dwUserToken, &EventData);
linkLayerShutdown(dwId);
if (CallObjectValidate(hQ931Call) == CS_OK)
CallObjectDestroy(pCallObject);
return;
}
UserUserData.length = (WORD)CodedLengthASN;
UserUserData.ptr = CodedPtrASN;
ResultPDU = Q931SetupEncodePDU(pCallObject->wCRV,
pCallObject->szDisplay, pCallObject->szCalledPartyNumber,
&UserUserData, &CodedPtrPDU, &CodedLengthPDU);
if (CodedPtrASN != NULL)
{
Q931FreeEncodedBuffer(&pCallObject->World, CodedPtrASN);
}
if ((ResultPDU != CS_OK) || (CodedLengthPDU == 0) ||
(CodedPtrPDU == NULL))
{
CSS_CALL_FAILED EventData;
ISRERROR(ghISRInst, "Q931SetupEncodePDU() failed, nothing to send.", 0L);
if (CodedPtrPDU != NULL)
{
MemFree(CodedPtrPDU);
}
EventData.error = CS_INTERNAL_ERROR;
dwId = pCallObject->dwPhysicalId;
pCallObject->Callback(Q931_CALL_FAILED, pCallObject->hQ931Call,
pCallObject->dwListenToken,
pCallObject->dwUserToken, &EventData);
linkLayerShutdown(dwId);
if (CallObjectValidate(hQ931Call) == CS_OK)
CallObjectDestroy(pCallObject);
return;
}
if (pCallObject->NonStandardDataPresent)
{
if (pCallObject->NonStandardData.sData.pOctetString != NULL)
{
MemFree(pCallObject->NonStandardData.sData.pOctetString);
pCallObject->NonStandardData.sData.pOctetString = NULL;
}
pCallObject->NonStandardDataPresent = FALSE;
}
Q931FreeAliasNames(pCallObject->pCallerAliasList);
pCallObject->pCallerAliasList = NULL;
Q931FreeAliasNames(pCallObject->pCalleeAliasList);
pCallObject->pCalleeAliasList = NULL;
Q931FreeAliasNames(pCallObject->pExtraAliasList);
pCallObject->pExtraAliasList = NULL;
Q931FreeAliasItem(pCallObject->pExtensionAliasItem);
pCallObject->pExtensionAliasItem = NULL;
TempResult=Q931SendMessage(pCallObject, CodedPtrPDU, CodedLengthPDU, TRUE);
if (CallObjectValidate(hQ931Call) != CS_OK)
return;
if(FAILED(TempResult))
{
CSS_CALL_FAILED EventData;
EventData.error = TempResult;
dwId = pCallObject->dwPhysicalId;
pCallObject->Callback(Q931_CALL_FAILED, pCallObject->hQ931Call,
pCallObject->dwListenToken,
pCallObject->dwUserToken, &EventData);
linkLayerShutdown(dwId);
if (CallObjectValidate(hQ931Call) == CS_OK)
CallObjectDestroy(pCallObject);
return;
}
Q931StartTimer(pCallObject, Q931_TIMER_303);
}
dwPhysicalId = pCallObject->dwPhysicalId;
CallObjectUnlock(pCallObject);
PostReceiveBuffer(dwPhysicalId, NULL);
}
//====================================================================================
//====================================================================================
void
Q931ListenCallback(DWORD_PTR dwInstance, HRESULT dwMessage,
CC_ADDR *LocalAddr, CC_ADDR *PeerAddr)
{
HQ931LISTEN hListenObject = (HQ931LISTEN)dwInstance;
P_LISTEN_OBJECT pListenObject = NULL;
CS_STATUS CreateObjectResult;
HQ931CALL hQ931Call;
P_CALL_OBJECT pCallObject = NULL;
HRESULT TempResult;
DWORD dwPhysicalId;
ISRTRACE(ghISRInst, "Q931ListenCallback.", 0L);
if (dwMessage != LINK_CONNECT_REQUEST)
{
ISRERROR(ghISRInst, "unexpected callback received on listen socket", 0L);
return;
}
if (FAILED(dwMessage))
{
ISRERROR(ghISRInst, "error on listen socket", 0L);
return;
}
if ((ListenObjectLock(hListenObject, &pListenObject) != CS_OK) || (pListenObject == NULL))
{
ISRERROR(ghISRInst, "ListenObjectLock() returned error", 0L);
return;
}
// create call object with all known attributes of this call.
// a handle of the call object is returned in phQ931Call.
CreateObjectResult = CallObjectCreate(&hQ931Call,
pListenObject->dwUserToken,
CC_INVALID_HANDLE,
pListenObject->ListenCallback,
FALSE, // I am NOT the caller.
LocalAddr, // Local address on which channel is connected
PeerAddr, // Address to which channel is connected
NULL, // Address of opposite call end-point.
NULL, // no source addr
NULL, // no conference id yet.
CSG_NONE, // no goal yet.
CC_CALLTYPE_UNKNOWN, // no call type yet.
FALSE, // caller is assumed to not be the MC.
NULL, // no display yet.
NULL, // no called party number yet.
NULL, // no caller aliases yet.
NULL, // no callee aliases yet.
NULL, // no extra aliases yet.
NULL, // no extension aliases.
NULL, // no EndpointType info yet.
NULL,
0, // no CRV yet.
NULL); // no h225 CallIdentifier yet.
if (CreateObjectResult != CS_OK)
{
ISRERROR(ghISRInst, "CallObjectCreate() failed.", 0L);
ListenObjectUnlock(pListenObject);
return;
}
if ((CallObjectLock(hQ931Call, &pCallObject) != CS_OK) || (pCallObject == NULL))
{
ISRERROR(ghISRInst, "CallObjectLock() returned error", 0L);
ListenObjectUnlock(pListenObject);
return;
}
TempResult = linkLayerInit(&pCallObject->dwPhysicalId, hQ931Call,
Q931ReceiveCallback, Q931SendComplete);
if (FAILED(TempResult))
{
ISRERROR(ghISRInst, "linkLayerInit() failed", 0);
linkLayerReject(pListenObject->dwPhysicalId);
CallObjectDestroy(pCallObject);
ListenObjectUnlock(pListenObject);
return;
}
// pCallObject->bCallState = CALLSTATE_NULL;
// unlock CallObject before calling down into h245ws in order to prevent deadlock - which
// is probably unlikely with linkLayerAccept(), but just to be safe and consistent...
// not sure if we need to worry about unlocking the listen object???
dwPhysicalId = pCallObject->dwPhysicalId;
CallObjectUnlock(pCallObject);
TempResult = linkLayerAccept(pListenObject->dwPhysicalId,
dwPhysicalId, Q931ConnectCallback);
if (FAILED(TempResult))
{
if((CallObjectLock(hQ931Call, &pCallObject) != CS_OK) || (pCallObject == NULL))
{
ListenObjectUnlock(pListenObject);
return;
}
ISRERROR(ghISRInst, "linkLayerAccept() failed", 0);
{
DWORD dwId = pCallObject->dwPhysicalId;
CallObjectDestroy(pCallObject);
linkLayerShutdown(dwId);
}
ListenObjectUnlock(pListenObject);
return;
}
ListenObjectUnlock(pListenObject);
}
//====================================================================================
//
// PUBLIC FUNCTIONS
//
//====================================================================================
//====================================================================================
//====================================================================================
CS_STATUS
H225Init()
{
CS_STATUS result;
if (H225_InitModule() != ASN1_SUCCESS)
{
ASSERT(FALSE);
return CS_SUBSYSTEM_FAILURE;
}
return CS_OK;
}
CS_STATUS
H225DeInit()
{
CS_STATUS result;
result = H225_TermModule();
if (result != CS_OK)
{
return CS_SUBSYSTEM_FAILURE;
}
return CS_OK;
}
CS_STATUS
Q931Init()
{
CS_STATUS result;
if (bQ931Initialized == TRUE)
{
ASSERT(FALSE);
return CS_DUPLICATE_INITIALIZE;
}
bQ931Initialized = TRUE;
// Register Call Setup for debug output
ISRREGISTERMODULE(&ghISRInst, "Q931", "Q931 Call Setup");
// Initialize the current conference ID to 0's, which is intentionally
// assigned to an invalid conference ID. Must create one for it
// to be valid.
memset(&(ConferenceIDSource), 0, sizeof(ConferenceIDSource));
InitializeCriticalSection(&(ConferenceIDSource.Lock));
if ((result = ListenListCreate()) != CS_OK)
{
return result;
}
if ((result = CallListCreate()) != CS_OK)
{
ListenListDestroy();
return result;
}
// init protocol ID structures
Q931PduInit();
#if (defined(_DEBUG) || defined(PCS_COMPLIANCE))
Q931Logger = InteropLoad(Q931LOG_PROTOCOL);
#endif
return CS_OK;
}
//====================================================================================
//====================================================================================
CS_STATUS
Q931DeInit()
{
CS_STATUS result1;
CS_STATUS result2;
if (bQ931Initialized == FALSE)
{
return CS_NOT_INITIALIZED;
}
#if (defined(_DEBUG) || defined(PCS_COMPLIANCE))
// This causes a protection exception, so don't do it for now. DAC 12/9/96
// InteropUnload(Q931Logger);
#endif
result1 = ListenListDestroy();
result2 = CallListDestroy();
DeleteCriticalSection(&(ConferenceIDSource.Lock));
bQ931Initialized = FALSE;
if (result1 != CS_OK)
{
return result1;
}
return result2;
}
//====================================================================================
//====================================================================================
CS_STATUS
Q931Listen(
PHQ931LISTEN phQ931Listen,
PCC_ADDR pListenAddr,
DWORD_PTR dwListenToken,
Q931_CALLBACK ListenCallback)
{
CS_STATUS CreateObjectResult;
P_LISTEN_OBJECT pListenObject = NULL;
HRESULT TempResult;
// make sure q931 is initialized with an initialize flag.
if (bQ931Initialized == FALSE)
{
return CS_NOT_INITIALIZED;
}
// make sure parms are validated.
if ((phQ931Listen == NULL) || (ListenCallback == NULL) || (pListenAddr == NULL))
{
ASSERT(FALSE);
return CS_BAD_PARAM;
}
SetDefaultPort(pListenAddr);
// create listen object with all known attributes of this listen session.
// a handle of the listen object is returned in phQ931Listen.
CreateObjectResult = ListenObjectCreate(phQ931Listen, dwListenToken, ListenCallback);
if (CreateObjectResult != CS_OK)
{
return CS_SUBSYSTEM_FAILURE;
}
if (ListenObjectLock(*phQ931Listen, &pListenObject) != CS_OK)
{
return CS_BAD_PARAM;
}
TempResult = linkLayerListen(&pListenObject->dwPhysicalId, *phQ931Listen,
pListenAddr, Q931ListenCallback);
ListenObjectUnlock(pListenObject);
if (FAILED(TempResult))
{
ISRTRACE(ghISRInst, "Q931Listen() linkLayerListen failed.", 0L);
return TempResult;
}
ISRTRACE(ghISRInst, "Q931Listen() completed successfully.", 0L);
return CS_OK;
}
//====================================================================================
// In the old code, this blocked until thread and socket were finished
// closing...
//====================================================================================
CS_STATUS
Q931CancelListen(
HQ931LISTEN hQ931Listen)
{
P_LISTEN_OBJECT pListenObject = NULL;
CS_STATUS Status;
// make sure q931 is initialized with an initialize flag.
if (bQ931Initialized == FALSE)
{
return CS_NOT_INITIALIZED;
}
ISRTRACE(ghISRInst, "Q931CancelListen() finding listen object...", 0L);
// lock the listen object, get the event to wait for, and unlock the listen object.
if (ListenObjectLock(hQ931Listen, &pListenObject) != CS_OK)
{
return CS_BAD_PARAM;
}
{
DWORD dwId = pListenObject->dwPhysicalId;
linkLayerShutdown(dwId);
// destroy the object. dont need to unlock it since entire object will be destroyed.
ISRTRACE(ghISRInst, "Q931CancelListen(): destroying listen object...", 0L);
Status = ListenObjectDestroy(pListenObject);
}
return Status;
}
//====================================================================================
//====================================================================================
CS_STATUS
Q931PlaceCall(
PHQ931CALL phQ931Call,
LPWSTR pszDisplay,
PCC_ALIASNAMES pCallerAliasList,
PCC_ALIASNAMES pCalleeAliasList,
PCC_ALIASNAMES pExtraAliasList,
PCC_ALIASITEM pExtensionAliasItem,
PCC_NONSTANDARDDATA pNonStandardData,
PCC_ENDPOINTTYPE pSourceEndpointType,
LPWSTR pszCalledPartyNumber,
PCC_ADDR pControlAddr,
PCC_ADDR pDestinationAddr,
PCC_ADDR pSourceAddr,
BOOL bCallerIsMC,
CC_CONFERENCEID *pConferenceID,
WORD wGoal,
WORD wCallType,
DWORD_PTR dwUserToken,
Q931_CALLBACK ConnectCallback,
WORD wCRV,
LPGUID pCallIdentifier)
{
CS_STATUS CreateObjectResult;
P_CALL_OBJECT pCallObject = NULL;
CC_ADDR PeerCallAddr;
CC_ADDR PeerConnectAddr;
CC_ADDR SourceAddr;
HRESULT TempResult;
char szAsciiDisplay[CC_MAX_DISPLAY_LENGTH + 1];
char szAsciiPartyNumber[CC_MAX_PARTY_NUMBER_LEN + 1];
DWORD dwPhysicalId;
// make sure q931 is initialized with an initialize flag.
if (bQ931Initialized == FALSE)
{
return CS_NOT_INITIALIZED;
}
// make sure parms are validated.
if ((phQ931Call == NULL) || (ConnectCallback == NULL) ||
((pControlAddr == NULL) && (pDestinationAddr == NULL)) ||
(pSourceEndpointType == NULL))
{
return CS_BAD_PARAM;
}
{
CS_STATUS TempStatus;
TempStatus = Q931ValidateAddr(pControlAddr);
if (TempStatus != CS_OK)
{
return TempStatus;
}
TempStatus = Q931ValidateAddr(pDestinationAddr);
if (TempStatus != CS_OK)
{
return TempStatus;
}
TempStatus = Q931ValidateAddr(pSourceAddr);
if (TempStatus != CS_OK)
{
return TempStatus;
}
TempStatus = Q931ValidateVendorInfo(pSourceEndpointType->pVendorInfo);
if (TempStatus != CS_OK)
{
return TempStatus;
}
TempStatus = Q931ValidateDisplay(pszDisplay);
if (TempStatus != CS_OK)
{
return TempStatus;
}
TempStatus = Q931ValidatePartyNumber(pszCalledPartyNumber);
if (TempStatus != CS_OK)
{
return TempStatus;
}
szAsciiDisplay[0] = '\0';
if (pszDisplay && WideCharToMultiByte(CP_ACP, 0, pszDisplay, -1, szAsciiDisplay,
sizeof(szAsciiDisplay), NULL, NULL) == 0)
{
return CS_BAD_PARAM;
}
szAsciiPartyNumber[0] = '\0';
if (pszCalledPartyNumber && WideCharToMultiByte(CP_ACP, 0, pszCalledPartyNumber, -1, szAsciiPartyNumber,
sizeof(szAsciiPartyNumber), NULL, NULL) == 0)
{
return CS_BAD_PARAM;
}
TempStatus = Q931ValidateNonStandardData(pNonStandardData);
if (TempStatus != CS_OK)
{
return TempStatus;
}
TempStatus = Q931ValidateAliasNames(pCallerAliasList);
if (TempStatus != CS_OK)
{
return TempStatus;
}
TempStatus = Q931ValidateAliasNames(pCalleeAliasList);
if (TempStatus != CS_OK)
{
return TempStatus;
}
TempStatus = Q931ValidateAliasNames(pExtraAliasList);
if (TempStatus != CS_OK)
{
return TempStatus;
}
TempStatus = Q931ValidateAliasItem(pExtensionAliasItem);
if (TempStatus != CS_OK)
{
return TempStatus;
}
}
// get the correct callee and control address to use for the call.
if (pDestinationAddr)
{
if (!MakeBinaryADDR(pDestinationAddr, &PeerCallAddr))
{
return CS_BAD_PARAM;
}
SetDefaultPort(&PeerCallAddr);
}
if (pControlAddr)
{
if (!MakeBinaryADDR(pControlAddr, &PeerConnectAddr))
{
return CS_BAD_PARAM;
}
SetDefaultPort(&PeerConnectAddr);
}
else
{
PeerConnectAddr = PeerCallAddr;
}
// get the correct callee and control address to use for the call.
if (pSourceAddr)
{
if (!MakeBinaryADDR(pSourceAddr, &SourceAddr))
{
return CS_BAD_PARAM;
}
SetDefaultPort(&SourceAddr);
}
if (wGoal == CSG_CREATE)
{
// caller is asking to start a new conference.
if (((DWORD *)pConferenceID->buffer)[0] == 0 &&
((DWORD *)pConferenceID->buffer)[1] == 0 &&
((DWORD *)pConferenceID->buffer)[2] == 0 &&
((DWORD *)pConferenceID->buffer)[3] == 0)
{
_ConferenceIDNew(pConferenceID);
}
}
// create call object with all known attributes of this call.
// a handle of the call object is returned in phQ931Call.
CreateObjectResult = CallObjectCreate(phQ931Call,
CC_INVALID_HANDLE,
dwUserToken,
ConnectCallback,
TRUE, // I am the caller.
NULL, // no local address yet.
&PeerConnectAddr,
pDestinationAddr ? &PeerCallAddr : NULL,
pSourceAddr ? &SourceAddr : NULL,
pConferenceID,
wGoal,
wCallType,
bCallerIsMC,
pszDisplay ? szAsciiDisplay : NULL,
pszCalledPartyNumber ? szAsciiPartyNumber : NULL,
pCallerAliasList,
pCalleeAliasList,
pExtraAliasList,
pExtensionAliasItem,
pSourceEndpointType,
pNonStandardData,
wCRV,
pCallIdentifier);
if (CreateObjectResult != CS_OK)
{
return CS_SUBSYSTEM_FAILURE;
}
if ((CallObjectLock(*phQ931Call, &pCallObject) != CS_OK) || (pCallObject == NULL))
{
ISRERROR(ghISRInst, "CallObjectLock() returned error", 0L);
return CS_SUBSYSTEM_FAILURE;
}
TempResult = linkLayerInit(&pCallObject->dwPhysicalId, *phQ931Call,
Q931ReceiveCallback, Q931SendComplete);
if (FAILED(TempResult))
{
ISRERROR(ghISRInst, "linkLayerInit() failed", 0);
CallObjectDestroy(pCallObject);
*phQ931Call = 0;
return TempResult;
}
// unlock CallObject before calling down into h245ws in order to prevent deadlock - which
// is probably unlikely with linkLayerConnect(), but just to be safe and consistent...
dwPhysicalId = pCallObject->dwPhysicalId;
CallObjectUnlock(pCallObject);
TempResult = linkLayerConnect(dwPhysicalId, &PeerConnectAddr,
Q931ConnectCallback);
if((CallObjectLock(*phQ931Call, &pCallObject) != CS_OK) || (pCallObject == NULL))
{
*phQ931Call = 0;
return(CS_INTERNAL_ERROR);
}
if (FAILED(TempResult))
{
ISRERROR(ghISRInst, "linkLayerConnect() failed", 0);
{
DWORD dwId = pCallObject->dwPhysicalId;
CallObjectDestroy(pCallObject);
linkLayerShutdown(dwId);
}
*phQ931Call = 0;
return TempResult;
}
// pCallObject->bCallState = CALLSTATE_NULL;
CallObjectUnlock(pCallObject);
ISRTRACE(ghISRInst, "Q931PlaceCall() completed successfully.", 0L);
return CS_OK;
}
//====================================================================================
// In the old code, this blocked until thread and socket were finished
// closing...
//====================================================================================
CS_STATUS
Q931Hangup(
HQ931CALL hQ931Call,
BYTE bReason)
{
P_CALL_OBJECT pCallObject = NULL;
CS_STATUS Status;
if (bQ931Initialized == FALSE)
{
return CS_NOT_INITIALIZED;
}
ISRTRACE(ghISRInst, "Entering Q931Hangup()...", 0L);
// need parameter checking...
if ((CallObjectLock(hQ931Call, &pCallObject) != CS_OK) || (pCallObject == NULL))
{
ISRTRACE(ghISRInst, "Call Object no longer available:", (DWORD)hQ931Call);
return CS_BAD_PARAM;
}
{
CS_STATUS SendStatus = CS_OK;
if (pCallObject->bCallState != CALLSTATE_NULL)
{
// send the RELEASE COMPLETE message to the peer to hang-up.
SendStatus = Q931SendReleaseCompleteMessage(pCallObject,
bReason, &(pCallObject->ConferenceID), NULL, NULL);
}
{
DWORD dwId = pCallObject->dwPhysicalId;
Status = CallObjectDestroy(pCallObject);
linkLayerShutdown(dwId);
}
if (FAILED(SendStatus))
{
return SendStatus;
}
}
return Status;
}
//====================================================================================
//====================================================================================
CS_STATUS
Q931AcceptCall(
HQ931CALL hQ931Call,
LPWSTR pszDisplay,
PCC_NONSTANDARDDATA pNonStandardData,
PCC_ENDPOINTTYPE pDestinationEndpointType,
PCC_ADDR pH245Addr,
DWORD_PTR dwUserToken)
{
P_CALL_OBJECT pCallObject = NULL;
CS_STATUS result = CS_OK;
char szAsciiDisplay[CC_MAX_DISPLAY_LENGTH + 1];
if (bQ931Initialized == FALSE)
{
return CS_NOT_INITIALIZED;
}
ISRTRACE(ghISRInst, "Entering Q931AcceptCall()...", 0L);
if ((pDestinationEndpointType == NULL) ||
(pDestinationEndpointType->pVendorInfo == NULL))
{
return CS_BAD_PARAM;
}
{
CS_STATUS TempStatus;
TempStatus = Q931ValidateVendorInfo(pDestinationEndpointType->pVendorInfo);
if (TempStatus != CS_OK)
{
return TempStatus;
}
TempStatus = Q931ValidateDisplay(pszDisplay);
if (TempStatus != CS_OK)
{
return TempStatus;
}
szAsciiDisplay[0] = '\0';
if (pszDisplay && WideCharToMultiByte(CP_ACP, 0, pszDisplay, -1, szAsciiDisplay,
sizeof(szAsciiDisplay), NULL, NULL) == 0)
{
return CS_BAD_PARAM;
}
TempStatus = Q931ValidateNonStandardData(pNonStandardData);
if (TempStatus != CS_OK)
{
return TempStatus;
}
}
if ((CallObjectLock(hQ931Call, &pCallObject) != CS_OK) || (pCallObject == NULL))
{
ISRERROR(ghISRInst, "CallObjectLock() returned error (Socket not found).", 0L);
return CS_INTERNAL_ERROR;
}
if (pCallObject->fIsCaller)
{
ISRERROR(ghISRInst, "Caller attempted to accept call.", 0L);
CallObjectUnlock(pCallObject);
return CS_OUT_OF_SEQUENCE;
}
// label with the user supplied UserToken for this call object.
pCallObject->dwUserToken = dwUserToken;
// send the CONNECT message to peer to accept call.
{
DWORD CodedLengthASN;
BYTE *CodedPtrASN;
HRESULT ResultASN = CS_OK;
CC_ADDR h245Addr;
if (pH245Addr != NULL)
{
MakeBinaryADDR(pH245Addr, &h245Addr);
}
ResultASN = Q931ConnectEncodeASN(pNonStandardData,
&(pCallObject->ConferenceID),
(pH245Addr ? &h245Addr : NULL),
pDestinationEndpointType,
&pCallObject->World,
&CodedPtrASN,
&CodedLengthASN,
&pCallObject->CallIdentifier);
if ((ResultASN != CS_OK) || (CodedLengthASN == 0) ||
(CodedPtrASN == NULL))
{
ISRERROR(ghISRInst, "Q931ConnectEncodeASN() failed, nothing to send.", 0L);
if (CodedPtrASN != NULL)
{
Q931FreeEncodedBuffer(&pCallObject->World, CodedPtrASN);
}
CallObjectUnlock(pCallObject);
return CS_SUBSYSTEM_FAILURE;
}
else
{
DWORD CodedLengthPDU;
BYTE *CodedPtrPDU;
BINARY_STRING UserUserData;
HRESULT ResultEncode = CS_OK;
HRESULT TempResult;
WORD wCRV = (WORD)(pCallObject->wCRV | 0x8000);
UserUserData.length = (WORD)CodedLengthASN;
UserUserData.ptr = CodedPtrASN;
ResultEncode = Q931ConnectEncodePDU(wCRV,
szAsciiDisplay, &UserUserData, &CodedPtrPDU, &CodedLengthPDU);
if (CodedPtrASN != NULL)
{
Q931FreeEncodedBuffer(&pCallObject->World, CodedPtrASN);
}
if ((ResultEncode != CS_OK) || (CodedLengthPDU == 0) ||
(CodedPtrPDU == NULL))
{
ISRERROR(ghISRInst, "Q931ConnectEncodePDU() failed, nothing to send.", 0L);
if (CodedPtrPDU != NULL)
{
MemFree(CodedPtrPDU);
}
CallObjectUnlock(pCallObject);
return CS_SUBSYSTEM_FAILURE;
}
TempResult = Q931SendMessage(pCallObject, CodedPtrPDU, CodedLengthPDU, TRUE);
if (CallObjectValidate(hQ931Call) != CS_OK)
return CS_INTERNAL_ERROR;
if (FAILED(TempResult))
{
ISRERROR(ghISRInst, "datalinkSendRequest() failed", 0);
if (CodedPtrPDU != NULL)
{
MemFree(CodedPtrPDU);
}
// when the connect notification fails...what should we do anyway????
CallObjectUnlock(pCallObject);
return TempResult;
}
}
}
pCallObject->bCallState = CALLSTATE_ACTIVE;
CallObjectUnlock(pCallObject);
return CS_OK;
}
//====================================================================================
//====================================================================================
CS_STATUS
Q931RejectCall(
HQ931CALL hQ931Call,
BYTE bRejectReason,
PCC_CONFERENCEID pConferenceID,
PCC_ADDR pAlternateAddr,
PCC_NONSTANDARDDATA pNonStandardData)
{
P_CALL_OBJECT pCallObject = NULL;
CS_STATUS result = CS_OK;
CS_STATUS Status = CS_OK;
if (bQ931Initialized == FALSE)
{
return CS_NOT_INITIALIZED;
}
ISRTRACE(ghISRInst, "Entering Q931RejectCall()...", 0L);
{
CS_STATUS TempStatus;
TempStatus = Q931ValidateNonStandardData(pNonStandardData);
if (TempStatus != CS_OK)
{
return TempStatus;
}
}
// if reason is alternate addr, but there is no alternate addr -->err
if (((bRejectReason == CC_REJECT_ROUTE_TO_GATEKEEPER) ||
(bRejectReason == CC_REJECT_CALL_FORWARDED) ||
(bRejectReason == CC_REJECT_ROUTE_TO_MC)) &&
(pAlternateAddr == NULL))
{
return CS_BAD_PARAM;
}
if ((CallObjectLock(hQ931Call, &pCallObject) != CS_OK) || (pCallObject == NULL))
{
ISRERROR(ghISRInst, "CallObjectLock() returned error (Socket not found).", 0L);
return CS_INTERNAL_ERROR;
}
if (pCallObject->fIsCaller)
{
ISRERROR(ghISRInst, "Caller attempted to reject call.", 0L);
CallObjectUnlock(pCallObject);
return CS_OUT_OF_SEQUENCE;
}
result = Q931SendReleaseCompleteMessage(pCallObject,
bRejectReason, pConferenceID, pAlternateAddr, pNonStandardData);
{
DWORD dwId = pCallObject->dwPhysicalId;
Status = CallObjectDestroy(pCallObject);
linkLayerShutdown(dwId);
}
if (result != CS_OK)
{
return result;
}
return Status;
}
//====================================================================================
//====================================================================================
CS_STATUS
Q931ReOpenConnection(
HQ931CALL hQ931Call)
{
P_CALL_OBJECT pCallObject = NULL;
HRESULT TempResult = CS_OK;
CC_ADDR PeerConnectAddr;
DWORD dwPhysicalId;
if (bQ931Initialized == FALSE)
{
return CS_NOT_INITIALIZED;
}
ISRTRACE(ghISRInst, "Entering Q931ReOpenConnection()...", 0L);
if ((CallObjectLock(hQ931Call, &pCallObject) != CS_OK) || (pCallObject == NULL))
{
ISRERROR(ghISRInst, "CallObjectLock() returned error.", 0L);
return CS_INTERNAL_ERROR;
}
if (pCallObject->bConnected)
{
return CS_OUT_OF_SEQUENCE;
}
Q931MakePhysicalID(&pCallObject->dwPhysicalId);
TempResult = linkLayerInit(&pCallObject->dwPhysicalId, hQ931Call,
Q931ReceiveCallback, Q931SendComplete);
if (FAILED(TempResult))
{
ISRERROR(ghISRInst, "linkLayerInit() failed on re-connect.", 0);
CallObjectUnlock(pCallObject);
return TempResult;
}
// unlock CallObject before calling down into h245ws in order to prevent deadlock - which
// is probably unlikely with linkLayerConnect, but just to be safe and consistent...
// copy stuff we need out of call object before we unlock it
dwPhysicalId = pCallObject->dwPhysicalId;
PeerConnectAddr = pCallObject->PeerConnectAddr;
CallObjectUnlock(pCallObject);
TempResult = linkLayerConnect(dwPhysicalId,
&PeerConnectAddr, Q931ConnectCallback);
if((CallObjectLock(hQ931Call, &pCallObject) != CS_OK) || (pCallObject == NULL))
{
return(CS_INTERNAL_ERROR);
}
if (FAILED(TempResult))
{
ISRERROR(ghISRInst, "linkLayerConnect() failed on re-connect.", 0);
linkLayerShutdown(pCallObject->dwPhysicalId);
CallObjectUnlock(pCallObject);
return TempResult;
}
CallObjectUnlock(pCallObject);
ISRTRACE(ghISRInst, "Q931ReOpenConnection() completed successfully.", 0L);
return CS_OK;
}
//====================================================================================
//====================================================================================
CS_STATUS
Q931GetVersion(
WORD wLength,
LPWSTR pszVersion)
{
WCHAR pszQ931Version[255];
// parameter validation.
if ((wLength == 0) || (pszVersion == NULL))
{
return CS_BAD_PARAM;
}
wcscpy(pszQ931Version, L"Call Setup ");
wcscat(pszQ931Version, Unicode(__DATE__));
wcscat(pszQ931Version, L" ");
wcscat(pszQ931Version, Unicode(__TIME__));
if (wcslen(pszQ931Version) >= wLength)
{
memcpy(pszVersion, pszQ931Version, (wLength-1)*sizeof(WCHAR));
pszQ931Version[wLength-1] = L'\0';
return CS_BAD_SIZE;
}
wcscpy(pszVersion, pszQ931Version);
return CS_OK;
}
//- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
// Timer Routines...
//- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
//====================================================================================
// Timer 301 has expired for this object...
//====================================================================================
void
CallBackT301(P_CALL_OBJECT pCallObject)
{
CSS_CALL_FAILED EventData;
HQ931CALL hQ931Call = pCallObject->hQ931Call;
EventData.error = CS_RINGING_TIMER_EXPIRED;
pCallObject->Callback(Q931_CALL_FAILED, pCallObject->hQ931Call,
pCallObject->dwListenToken,
pCallObject->dwUserToken, &EventData);
if (CallObjectValidate(hQ931Call) == CS_OK)
{
if (Q931SendReleaseCompleteMessage(pCallObject,
CC_REJECT_TIMER_EXPIRED, NULL, NULL, NULL) == CS_OK)
{
// nothing to do...
}
{
DWORD dwId = pCallObject->dwPhysicalId;
CallObjectDestroy(pCallObject);
linkLayerShutdown(dwId);
}
}
return;
}
//====================================================================================
// Timer 303 has expired for this object...
//====================================================================================
void
CallBackT303(P_CALL_OBJECT pCallObject)
{
CSS_CALL_FAILED EventData;
HQ931CALL hQ931Call = pCallObject->hQ931Call;
EventData.error = CS_SETUP_TIMER_EXPIRED;
pCallObject->Callback(Q931_CALL_FAILED, pCallObject->hQ931Call,
pCallObject->dwListenToken,
pCallObject->dwUserToken, &EventData);
if (CallObjectValidate(hQ931Call) == CS_OK)
{
if (Q931SendReleaseCompleteMessage(pCallObject,
CC_REJECT_TIMER_EXPIRED, NULL, NULL, NULL) == CS_OK)
{
// nothing to do...
}
{
DWORD dwId = pCallObject->dwPhysicalId;
CallObjectDestroy(pCallObject);
linkLayerShutdown(dwId);
}
}
return;
}
//====================================================================================
//====================================================================================
void
Q931SetReceivePDUHook(Q931_RECEIVE_PDU_CALLBACK Q931ReceivePDUCallback)
{
gReceivePDUHookProc = Q931ReceivePDUCallback;
return;
}
//====================================================================================
//====================================================================================
CS_STATUS
Q931FlushSendQueue(
HQ931CALL hQ931Call)
{
P_CALL_OBJECT pCallObject = NULL;
HRESULT TempResult = CS_OK;
DWORD dwPhysicalId;
if (bQ931Initialized == FALSE)
{
return CS_NOT_INITIALIZED;
}
ISRTRACE(ghISRInst, "Entering Q931FlushSendQueue()...", 0L);
// need parameter checking...
if ((CallObjectLock(hQ931Call, &pCallObject) != CS_OK) || (pCallObject == NULL))
{
ISRTRACE(ghISRInst, "Call Object no longer available:", (DWORD)hQ931Call);
return CS_INTERNAL_ERROR;
}
dwPhysicalId = pCallObject->dwPhysicalId;
CallObjectUnlock(pCallObject);
TempResult = linkLayerFlushChannel(dwPhysicalId, DATALINK_TRANSMIT);
if (FAILED(TempResult))
{
ISRERROR(ghISRInst, "datalinkSendRequest() failed", 0L);
}
return(TempResult);
}
#ifdef __cplusplus
}
#endif

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