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windows-nt/Source/XPSP1/NT/enduser/netmeeting/av/callcont/rqstcls.c

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/***********************************************************************
* *
* Filename: rqstcls.c *
* Module: H245 Finite State Machine Subsystem *
* *
***********************************************************************
* INTEL Corporation Proprietary 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) 1996 Intel Corporation. All rights reserved. *
***********************************************************************
* *
* $Workfile: RQSTCLS.C $
* $Revision: 1.5 $
* $Modtime: 09 Dec 1996 13:36:34 $
* $Log: S:/STURGEON/SRC/H245/SRC/VCS/RQSTCLS.C_v $
*
* Rev 1.5 09 Dec 1996 13:37:02 EHOWARDX
* Updated copyright notice.
*
* Rev 1.4 19 Jul 1996 12:15:40 EHOWARDX
*
* Changed to use event definitions from H245API.H.
*
* Rev 1.3 04 Jun 1996 13:57:30 EHOWARDX
* Fixed Release build warnings.
*
* Rev 1.2 30 May 1996 23:39:26 EHOWARDX
* Cleanup.
*
* Rev 1.1 29 May 1996 15:20:26 EHOWARDX
* Change to use HRESULT.
*
* Rev 1.0 09 May 1996 21:06:42 EHOWARDX
* Initial revision.
*
* Rev 1.6.1.2 09 May 1996 19:48:46 EHOWARDX
* Change TimerExpiryF function arguements.
*
* Rev 1.6.1.1 15 Apr 1996 10:46:22 EHOWARDX
* Update.
*
* Rev 1.6.1.0 10 Apr 1996 21:12:42 EHOWARDX
* Branched.
* *
***********************************************************************/
#include "precomp.h"
#include "h245api.h"
#include "h245com.h"
#include "h245fsm.h"
#include "rqstcls.h"
// request close channels from receive side outgoing states
#define ReqCloseOutIDLE 0
#define ReqCloseOutAwaitingResponse 1
// request close channels on open side incoming states
#define ReqCloseInIDLE 0
#define ReqCloseInAwaitingResponse 1
extern unsigned int uT108;
/***********************************************************************
*
* LOCAL FUNCTIONS
*
***********************************************************************/
/*
* NAME
* T108ExpiryF - Callback function called by the timer
*
*
* PARAMETERS
* INPUT dwInst current instance of H245
* INPUT id timer id
* INPUT pObject pointer to a State Entity
*
*
* RETURN VALUE
* OK
*/
int T108ExpiryF(struct InstanceStruct *pInstance, DWORD_PTR dwTimerId, void *pObject)
{
return FsmTimerEvent(pInstance, dwTimerId, pObject, T108Expiry);
} // T108ExpiryF()
/***********************************************************************
*
* OUT-GOING FINITE STATE MACHINE FUNCTIONS
*
***********************************************************************/
/*
* NAME
* closeRequestIdle - request to close a remote channel by API in idle state
*
*
* PARAMETERS
* INPUT pObject pointer to a State Entity
*
* RETURN VALUE
* error return codes defined in h245com.h
*/
HRESULT closeRequestIdle (Object_t *pObject, PDU_t *pPdu)
{
HRESULT lError;
ASSERT(pObject->Entity == CLCSE_OUT);
ASSERT(pObject->State == ReqCloseOutIDLE);
H245TRACE(pObject->dwInst, 2,
"Send RequestChannelClose to ASN; Channel=%d",
pObject->Key);
/* Send Request Channel Close to remote peer */
lError = sendPDU(pObject->pInstance, pPdu);
/* set timer T108 */
pObject->State = ReqCloseOutAwaitingResponse;
FsmStartTimer(pObject, T108ExpiryF, uT108);
return lError;
}
/*
* NAME
* requestCloseAckAwaitingR - received request close Ack in awaiting release state
*
*
* PARAMETERS
* INPUT pObject pointer to a State Entity
*
* RETURN VALUE
* error return codes defined in h245com.h
*/
HRESULT requestCloseAckAwaitingR(Object_t *pObject, PDU_t *pPdu)
{
ASSERT(pObject->Entity == CLCSE_OUT);
ASSERT(pObject->State == ReqCloseOutAwaitingResponse);
H245TRACE(pObject->dwInst, 2,
"H245_CONF_REQ_CLOSE to API; Channel=%d",
pObject->Key);
/* reset timer T108 */
FsmStopTimer(pObject);
/* Send CLOSE.confirm to client */
pObject->State = ReqCloseOutIDLE;
H245FsmConfirm(pPdu, H245_CONF_REQ_CLOSE, pObject->pInstance, pObject->dwTransId, FSM_OK);
return 0;
}
/*
* NAME
* requestCloseRejAwaitingR - received request close reject in Awaiting Release state
*
*
* PARAMETERS
* INPUT pObject pointer to a State Entity
*
* RETURN VALUE
* error return codes defined in h245com.h
*/
HRESULT requestCloseRejAwaitingR(Object_t *pObject, PDU_t *pPdu)
{
ASSERT(pObject->Entity == CLCSE_OUT);
ASSERT(pObject->State == ReqCloseOutAwaitingResponse);
H245TRACE(pObject->dwInst, 2,
"H245_CONF_REQ_CLOSE to API with REJECT; Channel=%d",
pObject->Key);
/* reset timer T108 */
FsmStopTimer(pObject);
/* Send REJECT.indication to client */
pObject->State = ReqCloseOutIDLE;
H245FsmConfirm(pPdu,H245_CONF_REQ_CLOSE, pObject->pInstance, pObject->dwTransId,REJECT);
return 0;
}
/*
* NAME
* t108ExpiryAwaitingR - handle timer expiry of an outstanding request close
*
*
* PARAMETERS
* INPUT pObject pointer to a State Entity
*
* RETURN VALUE
* error return codes defined in h245com.h
*/
HRESULT t108ExpiryAwaitingR (Object_t *pObject, PDU_t *pPdu)
{
PDU_t * pOut;
HRESULT lError;
ASSERT(pObject->Entity == CLCSE_OUT);
ASSERT(pObject->State == ReqCloseOutAwaitingResponse);
ASSERT(pPdu == NULL);
H245TRACE(pObject->dwInst, 2,
"H245_CONF_REQ_CLOSE with Timer T108 Expiry to API; Channel=%d",
pObject->Key);
/* Send Request Channel Close Release to remote peer */
pOut = (PDU_t *) MemAlloc(sizeof(*pOut));
if (pOut == NULL)
{
H245TRACE(pObject->dwInst, 2,
"t108ExpiryAwaitingR: memory allocation failed");
return H245_ERROR_NOMEM;
}
pOut->choice = indication_chosen;
pOut->u.indication.choice = rqstChnnlClsRls_chosen;
pOut->u.indication.u.rqstChnnlClsRls.forwardLogicalChannelNumber = (WORD)pObject->Key;
lError = sendPDU(pObject->pInstance, pOut);
MemFree(pOut);
/* Send REJECT.indication (SOURCE:=PROTOCOL to client */
pObject->State = ReqCloseOutIDLE;
H245FsmConfirm(NULL, H245_CONF_REQ_CLOSE, pObject->pInstance, pObject->dwTransId, TIMER_EXPIRY);
return lError;
}
/***********************************************************************
*
* IN-COMING FINITE STATE MACHINE FUNCTIONS
*
***********************************************************************/
/*
* NAME
* requestCloseIdle - received requestClose in idle state
*
*
* PARAMETERS
* INPUT pObject pointer to a State Entity
*
* RETURN VALUE
* error return codes defined in h245com.h
*/
HRESULT requestCloseIdle (Object_t *pObject, PDU_t *pPdu)
{
ASSERT(pObject->Entity == CLCSE_IN);
ASSERT(pObject->State == ReqCloseInIDLE);
H245TRACE(pObject->dwInst, 2,
"H245_IND_REQ_CLOSE with no error to API; Channel=%d",
pObject->Key);
/* Send CLOSE.indication to client */
pObject->State = ReqCloseInAwaitingResponse;
H245FsmIndication(pPdu, H245_IND_REQ_CLOSE, pObject->pInstance, pObject->dwTransId, FSM_OK);
return 0;
}
/*
* NAME
* closeResponseAwaitingR - respond to a requestclose with an Ack (or Reject)
*
*
* PARAMETERS
* INPUT pObject pointer to a State Entity
*
* RETURN VALUE
* error return codes defined in h245com.h
*/
HRESULT closeResponseAwaitingR(Object_t *pObject, PDU_t *pPdu)
{
ASSERT(pObject->Entity == CLCSE_IN);
ASSERT(pObject->State == ReqCloseInAwaitingResponse);
H245TRACE(pObject->dwInst, 2,
"Request Close Response Ack to ASN; Channel=%d",
pObject->Key);
/* Send Request Channel Close Ack to remote peer */
pObject->State = ReqCloseInIDLE;
return sendPDU(pObject->pInstance, pPdu);
}
HRESULT rejectRequestAwaitingR(Object_t *pObject, PDU_t *pPdu)
{
ASSERT(pObject->Entity == CLCSE_IN);
ASSERT(pObject->State == ReqCloseInAwaitingResponse);
H245TRACE(pObject->dwInst, 2, "Request Close Response Reject to ASN; Channel=%d",
pObject->Key);
/* Send Request Channel Close Reject to remote peer */
pObject->State = ReqCloseInIDLE;
return sendPDU(pObject->pInstance, pPdu);
}
/*
* NAME
* requestCloseReleaseAwaitingR - received a release while awaiting the api to respond
*
*
* PARAMETERS
* INPUT pObject pointer to a State Entity
*
* RETURN VALUE
* error return codes defined in h245com.h
*/
HRESULT requestCloseReleaseAwaitingR(Object_t *pObject, PDU_t *pPdu)
{
ASSERT(pObject->Entity == CLCSE_IN);
ASSERT(pObject->State == ReqCloseInAwaitingResponse);
H245TRACE(pObject->dwInst, 2,
"H245_IND_REQ_CLOSE with Reject to API; Channel=%d",
pObject->Key);
/* Send REJECT.indication to client */
pObject->State = ReqCloseInIDLE;
H245FsmIndication(pPdu, H245_IND_CLCSE_RELEASE, pObject->pInstance, pObject->dwTransId, FSM_OK);
return 0;
}
/*
* NAME
* requestCloseAwaitingR - overriding requestClose pdu in Awaiting Release state
*
*
* PARAMETERS
* INPUT pObject pointer to a State Entity
*
* RETURN VALUE
* error return codes defined in h245com.h
*/
HRESULT requestCloseAwaitingR (Object_t *pObject, PDU_t *pPdu)
{
ASSERT(pObject->Entity == CLCSE_IN);
ASSERT(pObject->State == ReqCloseInAwaitingResponse);
H245TRACE(pObject->dwInst, 2,
"Overriding H245_IND_REQ_CLOSE with OK to API; Channel=%d",
pObject->Key);
#if defined(SDL_COMPLIANT)
/* Send REJECT.indication to client - not necessary */
H245FsmIndication(pPdu, H245_IND_REQ_CLOSE, pObject->pInstance, pObject->dwTransId, REJECT);
#endif
/* Send CLOSE.indication to client */
H245FsmIndication(pPdu, H245_IND_REQ_CLOSE, pObject->pInstance, pObject->dwTransId, FSM_OK);
return 0;
}

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