578 lines
17 KiB
C
578 lines
17 KiB
C
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/***********************************************************************
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* *
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* Filename: mlse.c *
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* Module: H245 Finite State Machine Subsystem *
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* *
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***********************************************************************
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* INTEL Corporation Proprietary Information *
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* *
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* This listing is supplied under the terms of a license agreement *
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* with INTEL Corporation and may not be copied nor disclosed except *
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* in accordance with the terms of that agreement. *
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* *
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* Copyright (c) 1996 Intel Corporation. All rights reserved. *
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***********************************************************************
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* *
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* $Workfile: MLSE.C $
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* $Revision: 1.4 $
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* $Modtime: 09 Dec 1996 13:34:24 $
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* $Log: S:/STURGEON/SRC/H245/SRC/VCS/MLSE.C_v $
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*
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* Rev 1.4 09 Dec 1996 13:34:46 EHOWARDX
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* Updated copyright notice.
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*
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* Rev 1.3 04 Jun 1996 13:57:24 EHOWARDX
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* Fixed Release build warnings.
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*
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* Rev 1.2 30 May 1996 23:39:14 EHOWARDX
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* Cleanup.
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*
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* Rev 1.1 28 May 1996 14:25:42 EHOWARDX
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* Tel Aviv update.
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*
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* Rev 1.0 09 May 1996 21:06:30 EHOWARDX
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* Initial revision.
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*
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* Rev 1.1 09 May 1996 19:48:26 EHOWARDX
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* Change TimerExpiryF function arguements.
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*
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* Rev 1.0 15 Apr 1996 10:46:58 EHOWARDX
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* Initial revision.
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* *
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***********************************************************************/
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#include "precomp.h"
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#include "h245api.h"
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#include "h245com.h"
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#include "h245fsm.h"
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#include "mlse.h"
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// Out-going/In-coming MLSE states
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#define MLSE_NOT_LOOPED 0 // NOT LOOPED
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#define MLSE_WAIT 1 // AWAITING RESPONSE
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#define MLSE_LOOPED 1 // LOOPED
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extern unsigned int uT102;
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/***********************************************************************
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*
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* LOCAL FUNCTIONS
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*
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***********************************************************************/
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/*
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* NAME
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* T102ExpiryF - Callback function called by the timer
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*
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*
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* PARAMETERS
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* INPUT dwInst current instance of H245
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* INPUT id timer id
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* INPUT pObject pointer to a State Entity
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*
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*
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* RETURN VALUE
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* OK
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*/
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int T102ExpiryF(struct InstanceStruct *pInstance, DWORD_PTR dwTimerId, void *pObject)
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{
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return FsmTimerEvent(pInstance, dwTimerId, pObject, T102Expiry);
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} // T102ExpiryF()
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static void BuildMaintenanceLoopOffCommand(PDU_t *pPdu)
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{
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pPdu->choice = MSCMg_cmmnd_chosen;
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pPdu->u.MSCMg_cmmnd.choice = mntnncLpOffCmmnd_chosen;
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} // BuildMaintenanceLoopOffCommand()
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/***********************************************************************
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*
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* OUT-GOING FINITE STATE MACHINE FUNCTIONS
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*
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***********************************************************************/
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/*
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* NAME
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* MLSE0_LOOP_requestF - LOOP.request from API in NOT LOOPED state
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*
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*
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* PARAMETERS
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* INPUT pObject pointer to State Entity
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* INPUT pPdu pointer to PDU
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*
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* RETURN VALUE
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* Error return codes defined in h245com.h
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*/
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HRESULT MLSE0_LOOP_requestF (Object_t *pObject, PDU_t *pPdu)
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{
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HRESULT lError;
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ASSERT(pObject->Entity == MLSE_OUT);
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ASSERT(pObject->State == MLSE_NOT_LOOPED);
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H245TRACE(pObject->dwInst, 2, "MLSE0_LOOP_request:%d", pObject->Key);
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// Save type from PDU
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pObject->u.mlse.wLoopType =
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pPdu->u.MltmdSystmCntrlMssg_rqst.u.maintenanceLoopRequest.type.choice;
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// Send Maintenance Loop Request PDU to remote peer
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lError = sendPDU(pObject->pInstance, pPdu);
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// Set timer T102
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pObject->State = MLSE_WAIT;
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FsmStartTimer(pObject, T102ExpiryF, uT102);
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return lError;
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} // MLSE0_LOOP_request
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/*
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* NAME
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* MLSE1_MaintenanceLoopAckF - MaintenanceLoopAck in AWAITING RESPONSE state
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*
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*
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* PARAMETERS
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* INPUT pObject pointer to State Entity
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* INPUT pPdu pointer to PDU
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*
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* RETURN VALUE
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* Error return codes defined in h245com.h
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*/
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HRESULT MLSE1_MaintenanceLoopAckF (Object_t *pObject, PDU_t *pPdu)
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{
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ASSERT(pObject->Entity == MLSE_OUT);
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ASSERT(pObject->State == MLSE_WAIT);
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H245TRACE(pObject->dwInst, 2, "MLSE1_MaintenanceLoopAck:%d", pObject->Key);
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// Reset timer T102
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FsmStopTimer(pObject);
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// Send LOOP.confirm to client
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pObject->State = MLSE_LOOPED;
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H245FsmConfirm(pPdu, H245_CONF_MLSE, pObject->pInstance, pObject->dwTransId, FSM_OK);
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return 0;
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} // MLSE1_MaintenanceLoopAck
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/*
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* NAME
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* MLSE1_MaintenanceLoopRejF - MaintenanceLoopReject in AWAITING RESPONSE state
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*
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*
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* PARAMETERS
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* INPUT pObject pointer to State Entity
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* INPUT pPdu pointer to PDU
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*
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* RETURN VALUE
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* Error return codes defined in h245com.h
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*/
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HRESULT MLSE1_MaintenanceLoopRejF (Object_t *pObject, PDU_t *pPdu)
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{
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ASSERT(pObject->Entity == MLSE_OUT);
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ASSERT(pObject->State == MLSE_WAIT);
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H245TRACE(pObject->dwInst, 2, "MLSE1_MaintenanceLoopRej:%d", pObject->Key);
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// Reset timer T102
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FsmStopTimer(pObject);
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// Send RELEASE.indication to client
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pObject->State = MLSE_NOT_LOOPED;
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H245FsmConfirm(pPdu, H245_CONF_MLSE_REJECT, pObject->pInstance, pObject->dwTransId, FSM_OK);
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return 0;
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} // MLSE1_MaintenanceLoopRej
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/*
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* NAME
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* MLSE1_OUT_RELEASE_requestF - RELEASE.request from API in AWAITING RESPONSE state
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*
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*
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* PARAMETERS
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* INPUT pObject pointer to State Entity
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* INPUT pPdu pointer to PDU
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*
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* RETURN VALUE
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* Error return codes defined in h245com.h
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*/
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HRESULT MLSE1_OUT_RELEASE_requestF (Object_t *pObject, PDU_t *pPdu)
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{
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ASSERT(pObject->Entity == MLSE_OUT);
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ASSERT(pObject->State == MLSE_WAIT);
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H245TRACE(pObject->dwInst, 2, "MLSE1_OUT_RELEASE_request:%d", pObject->Key);
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// Send MaintenanceLoopOffCommand PDU to remote peer
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pObject->State = MLSE_NOT_LOOPED;
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BuildMaintenanceLoopOffCommand(pPdu);
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return sendPDU(pObject->pInstance, pPdu);
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} // MLSE1_OUT_RELEASE_request
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/*
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* NAME
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* MLSE1_T102ExpiryF - timer T102 Expiry in AWAITING RESPONSE state
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*
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*
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* PARAMETERS
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* INPUT pObject pointer to State Entity
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* INPUT pPdu pointer to PDU
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*
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* RETURN VALUE
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* Error return codes defined in h245com.h
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*/
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HRESULT MLSE1_T102ExpiryF (Object_t *pObject, PDU_t *pPdu)
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{
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PDU_t * pOut;
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HRESULT lError;
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ASSERT(pObject->Entity == MLSE_OUT);
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ASSERT(pObject->State == MLSE_WAIT);
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ASSERT(pPdu == NULL);
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H245TRACE(pObject->dwInst, 2, "MLSE1_T102Expiry:%d", pObject->Key);
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// Send MaintenanceLoopOffCommand PDU to remote peer
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pOut = MemAlloc(sizeof(*pOut));
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if (pOut == NULL)
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{
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H245TRACE(pObject->dwInst, 2,
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"MLSE1_T102ExpiryF: memory allocation failed");
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return H245_ERROR_NOMEM;
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}
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BuildMaintenanceLoopOffCommand(pOut);
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lError = sendPDU(pObject->pInstance, pOut);
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MemFree(pOut);
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// Send RELEASE.indication to client
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// SOURCE := MLSE
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pObject->State = MLSE_NOT_LOOPED;
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H245FsmConfirm(NULL, H245_CONF_MLSE_EXPIRED, pObject->pInstance, pObject->dwTransId, FSM_OK);
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return lError;
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} // MLSE1_T102Expiry
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/*
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* NAME
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* MLSE2_MaintenanceLoopRejF - MaintenanceLoopReject in LOOPED state
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*
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*
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* PARAMETERS
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* INPUT pObject pointer to State Entity
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* INPUT pPdu pointer to PDU
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*
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* RETURN VALUE
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* Error return codes defined in h245com.h
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*/
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HRESULT MLSE2_MaintenanceLoopRejF (Object_t *pObject, PDU_t *pPdu)
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{
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ASSERT(pObject->Entity == MLSE_OUT);
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ASSERT(pObject->State == MLSE_WAIT);
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H245TRACE(pObject->dwInst, 2, "MLSE2_MaintenanceLoopRej:%d", pObject->Key);
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pObject->State = MLSE_NOT_LOOPED;
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#if defined(SDL_COMPLIANT)
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// Send ERROR.indication(B) to client
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// TBD
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#endif
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// Send RELEASE.indication to client
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// SOURCE := MLSE
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H245FsmConfirm(pPdu, H245_CONF_MLSE_REJECT, pObject->pInstance, pObject->dwTransId, FSM_OK);
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return 0;
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} // MLSE2_MaintenanceLoopRej
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/*
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* NAME
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* MLSE2_OUT_RELEASE_requestF - RELEASE.request from API in LOOPED state
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*
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*
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* PARAMETERS
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* INPUT pObject pointer to State Entity
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* INPUT pPdu pointer to PDU
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*
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* RETURN VALUE
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* Error return codes defined in h245com.h
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*/
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HRESULT MLSE2_OUT_RELEASE_requestF (Object_t *pObject, PDU_t *pPdu)
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{
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ASSERT(pObject->Entity == MLSE_OUT);
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ASSERT(pObject->State == MLSE_WAIT);
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H245TRACE(pObject->dwInst, 2, "MLSE2_OUT_RELEASE_request:%d", pObject->Key);
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// Send MaintenanceLoopOffCommand PDU to remote peer
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pObject->State = MLSE_NOT_LOOPED;
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BuildMaintenanceLoopOffCommand(pPdu);
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return sendPDU(pObject->pInstance, pPdu);
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} // MLSE2_OUT_RELEASE_request
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/***********************************************************************
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*
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* IN-COMING FINITE STATE MACHINE FUNCTIONS
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*
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***********************************************************************/
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/*
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* NAME
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* MLSE0_MaintenanceLoopRequestF - MaintenanceLoopRequest received in NOT LOOPED state
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*
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*
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* PARAMETERS
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* INPUT pObject pointer to State Entity
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* INPUT pPdu pointer to PDU
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*
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* RETURN VALUE
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* Error return codes defined in h245com.h
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*/
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HRESULT MLSE0_MaintenanceLoopRequestF (Object_t *pObject, PDU_t *pPdu)
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{
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ASSERT(pObject->Entity == MLSE_IN);
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ASSERT(pObject->State == MLSE_NOT_LOOPED);
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H245TRACE(pObject->dwInst, 2, "MLSE0_MaintenanceLoopRequest:%d", pObject->Key);
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// Save type from PDU
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pObject->u.mlse.wLoopType =
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pPdu->u.MltmdSystmCntrlMssg_rqst.u.maintenanceLoopRequest.type.choice;
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// Send LOOP.indication to client
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pObject->State = MLSE_WAIT;
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H245FsmIndication(pPdu, H245_IND_MLSE, pObject->pInstance, pObject->dwTransId, FSM_OK);
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return 0;
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} // MLSE0_MaintenanceLoopRequest
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|
|||
|
|
|
|||
|
|
|
|||
|
|
/*
|
|||
|
|
* NAME
|
|||
|
|
* MLSE1_MaintenanceLoopRequestF - MaintenanceLoopRequest received in AWAITING RESPONSE state
|
|||
|
|
*
|
|||
|
|
*
|
|||
|
|
* PARAMETERS
|
|||
|
|
* INPUT pObject pointer to State Entity
|
|||
|
|
* INPUT pPdu pointer to PDU
|
|||
|
|
*
|
|||
|
|
* RETURN VALUE
|
|||
|
|
* Error return codes defined in h245com.h
|
|||
|
|
*/
|
|||
|
|
|
|||
|
|
HRESULT MLSE1_MaintenanceLoopRequestF (Object_t *pObject, PDU_t *pPdu)
|
|||
|
|
{
|
|||
|
|
ASSERT(pObject->Entity == MLSE_IN);
|
|||
|
|
ASSERT(pObject->State == MLSE_WAIT);
|
|||
|
|
H245TRACE(pObject->dwInst, 2, "MLSE1_MaintenanceLoopRequest:%d", pObject->Key);
|
|||
|
|
|
|||
|
|
// Save type from PDU
|
|||
|
|
pObject->u.mlse.wLoopType =
|
|||
|
|
pPdu->u.MltmdSystmCntrlMssg_rqst.u.maintenanceLoopRequest.type.choice;
|
|||
|
|
|
|||
|
|
#if defined(SDL_COMPLIANT)
|
|||
|
|
// Send RELEASE.indication to client
|
|||
|
|
H245FsmIndication(pPdu, H245_IND_MLSE_RELEASE, pObject->pInstance, pObject->dwTransId, FSM_OK);
|
|||
|
|
#endif
|
|||
|
|
|
|||
|
|
// Send LOOP.indication to client
|
|||
|
|
H245FsmIndication(pPdu, H245_IND_MLSE, pObject->pInstance, pObject->dwTransId, FSM_OK);
|
|||
|
|
|
|||
|
|
return 0;
|
|||
|
|
} // MLSE1_MaintenanceLoopRequest
|
|||
|
|
|
|||
|
|
|
|||
|
|
|
|||
|
|
/*
|
|||
|
|
* NAME
|
|||
|
|
* MLSE1_MaintenanceLoopReleaseF - MaintenanceLoopOffCommand received in AWAITING RESPONSE state
|
|||
|
|
*
|
|||
|
|
*
|
|||
|
|
* PARAMETERS
|
|||
|
|
* INPUT pObject pointer to State Entity
|
|||
|
|
* INPUT pPdu pointer to PDU
|
|||
|
|
*
|
|||
|
|
* RETURN VALUE
|
|||
|
|
* Error return codes defined in h245com.h
|
|||
|
|
*/
|
|||
|
|
|
|||
|
|
HRESULT MLSE1_MaintenanceLoopOffCommandF(Object_t *pObject, PDU_t *pPdu)
|
|||
|
|
{
|
|||
|
|
ASSERT(pObject->Entity == MLSE_IN);
|
|||
|
|
ASSERT(pObject->State == MLSE_WAIT);
|
|||
|
|
H245TRACE(pObject->dwInst, 2, "MLSE1_MaintenanceLoopOffCommand:%d", pObject->Key);
|
|||
|
|
|
|||
|
|
// Send RELEASE.indication to client
|
|||
|
|
pObject->State = MLSE_NOT_LOOPED;
|
|||
|
|
H245FsmIndication(pPdu, H245_IND_MLSE_RELEASE, pObject->pInstance, pObject->dwTransId, FSM_OK);
|
|||
|
|
|
|||
|
|
return 0;
|
|||
|
|
} // MLSE1_MaintenanceLoopOffCommand
|
|||
|
|
|
|||
|
|
|
|||
|
|
|
|||
|
|
/*
|
|||
|
|
* NAME
|
|||
|
|
* MLSE1_LOOP_responseF - LOOP.response from API in AWAITING RESPONSE state
|
|||
|
|
*
|
|||
|
|
*
|
|||
|
|
* PARAMETERS
|
|||
|
|
* INPUT pObject pointer to State Entity
|
|||
|
|
* INPUT pPdu pointer to PDU
|
|||
|
|
*
|
|||
|
|
* RETURN VALUE
|
|||
|
|
* Error return codes defined in h245com.h
|
|||
|
|
*/
|
|||
|
|
|
|||
|
|
HRESULT MLSE1_LOOP_responseF (Object_t *pObject, PDU_t *pPdu)
|
|||
|
|
{
|
|||
|
|
ASSERT(pObject->Entity == MLSE_IN);
|
|||
|
|
ASSERT(pObject->State == MLSE_WAIT);
|
|||
|
|
H245TRACE(pObject->dwInst, 2, "MLSE1_LOOP_response:%d", pObject->Key);
|
|||
|
|
|
|||
|
|
// Send MaintenanceLoopAck PDU to remote peer
|
|||
|
|
pPdu->u.MSCMg_rspns.u.maintenanceLoopAck.type.choice = pObject->u.mlse.wLoopType;
|
|||
|
|
switch (pObject->u.mlse.wLoopType)
|
|||
|
|
{
|
|||
|
|
case systemLoop_chosen:
|
|||
|
|
break;
|
|||
|
|
case mediaLoop_chosen:
|
|||
|
|
pPdu->u.MSCMg_rspns.u.maintenanceLoopAck.type.u.mediaLoop = (WORD)pObject->Key;
|
|||
|
|
break;
|
|||
|
|
case logicalChannelLoop_chosen:
|
|||
|
|
pPdu->u.MSCMg_rspns.u.maintenanceLoopAck.type.u.logicalChannelLoop = (WORD)pObject->Key;
|
|||
|
|
break;
|
|||
|
|
default:
|
|||
|
|
H245TRACE(pObject->dwInst, 1, "Invalid loop type %d", pObject->u.mlse.wLoopType);
|
|||
|
|
} // switch
|
|||
|
|
pObject->State = MLSE_LOOPED;
|
|||
|
|
return sendPDU(pObject->pInstance, pPdu);
|
|||
|
|
} // MLSE1_LOOP_response
|
|||
|
|
|
|||
|
|
|
|||
|
|
|
|||
|
|
/*
|
|||
|
|
* NAME
|
|||
|
|
* MLSE1_IN_RELEASE_requestF - RELEASE.request from API in AWAITING RESPONSE state
|
|||
|
|
*
|
|||
|
|
*
|
|||
|
|
* PARAMETERS
|
|||
|
|
* INPUT pObject pointer to State Entity
|
|||
|
|
* INPUT pPdu pointer to PDU
|
|||
|
|
*
|
|||
|
|
* RETURN VALUE
|
|||
|
|
* Error return codes defined in h245com.h
|
|||
|
|
*/
|
|||
|
|
|
|||
|
|
HRESULT MLSE1_IN_RELEASE_requestF (Object_t *pObject, PDU_t *pPdu)
|
|||
|
|
{
|
|||
|
|
ASSERT(pObject->Entity == MLSE_IN);
|
|||
|
|
ASSERT(pObject->State == MLSE_WAIT);
|
|||
|
|
H245TRACE(pObject->dwInst, 2, "MLSE1_IN_RELEASE_request:%d", pObject->Key);
|
|||
|
|
|
|||
|
|
// Send MaintenanceLoopReject PDU to remote peer
|
|||
|
|
pPdu->u.MSCMg_rspns.u.maintenanceLoopReject.type.choice = pObject->u.mlse.wLoopType;
|
|||
|
|
switch (pObject->u.mlse.wLoopType)
|
|||
|
|
{
|
|||
|
|
case systemLoop_chosen:
|
|||
|
|
break;
|
|||
|
|
case mediaLoop_chosen:
|
|||
|
|
pPdu->u.MSCMg_rspns.u.maintenanceLoopReject.type.u.mediaLoop = (WORD)pObject->Key;
|
|||
|
|
break;
|
|||
|
|
case logicalChannelLoop_chosen:
|
|||
|
|
pPdu->u.MSCMg_rspns.u.maintenanceLoopReject.type.u.logicalChannelLoop = (WORD)pObject->Key;
|
|||
|
|
break;
|
|||
|
|
default:
|
|||
|
|
H245TRACE(pObject->dwInst, 1, "Invalid loop type %d", pObject->u.mlse.wLoopType);
|
|||
|
|
} // switch
|
|||
|
|
pObject->State = MLSE_NOT_LOOPED;
|
|||
|
|
return sendPDU(pObject->pInstance, pPdu);
|
|||
|
|
} // MLSE1_IN_RELEASE_request
|
|||
|
|
|
|||
|
|
|
|||
|
|
|
|||
|
|
/*
|
|||
|
|
* NAME
|
|||
|
|
* MLSE2_MaintenanceLoopRequestF - MaintenanceLoopRequest received in LOOPED state
|
|||
|
|
*
|
|||
|
|
*
|
|||
|
|
* PARAMETERS
|
|||
|
|
* INPUT pObject pointer to State Entity
|
|||
|
|
* INPUT pPdu pointer to PDU
|
|||
|
|
*
|
|||
|
|
* RETURN VALUE
|
|||
|
|
* Error return codes defined in h245com.h
|
|||
|
|
*/
|
|||
|
|
|
|||
|
|
HRESULT MLSE2_MaintenanceLoopRequestF (Object_t *pObject, PDU_t *pPdu)
|
|||
|
|
{
|
|||
|
|
ASSERT(pObject->Entity == MLSE_IN);
|
|||
|
|
ASSERT(pObject->State == MLSE_LOOPED);
|
|||
|
|
H245TRACE(pObject->dwInst, 2, "MLSE2_MaintenanceLoopRequest:%d", pObject->Key);
|
|||
|
|
|
|||
|
|
// Save type from PDU
|
|||
|
|
pObject->u.mlse.wLoopType =
|
|||
|
|
pPdu->u.MltmdSystmCntrlMssg_rqst.u.maintenanceLoopRequest.type.choice;
|
|||
|
|
|
|||
|
|
pObject->State = MLSE_WAIT;
|
|||
|
|
|
|||
|
|
#if defined(SDL_COMPLIANT)
|
|||
|
|
// Send RELEASE.indication to client
|
|||
|
|
H245FsmIndication(pPdu, H245_IND_MLSE_RELEASE, pObject->pInstance, pObject->dwTransId, FSM_OK);
|
|||
|
|
#endif
|
|||
|
|
|
|||
|
|
// Send LOOP.indication to client
|
|||
|
|
H245FsmIndication(pPdu, H245_IND_MLSE, pObject->pInstance, pObject->dwTransId, FSM_OK);
|
|||
|
|
|
|||
|
|
return 0;
|
|||
|
|
} // MLSE2_MaintenanceLoopRequest
|
|||
|
|
|
|||
|
|
|
|||
|
|
|
|||
|
|
/*
|
|||
|
|
* NAME
|
|||
|
|
* MLSE2_MaintenanceLoopReleaseF - MaintenanceLoopOffCommand received in LOOPED state
|
|||
|
|
*
|
|||
|
|
*
|
|||
|
|
* PARAMETERS
|
|||
|
|
* INPUT pObject pointer to State Entity
|
|||
|
|
* INPUT pPdu pointer to PDU
|
|||
|
|
*
|
|||
|
|
* RETURN VALUE
|
|||
|
|
* Error return codes defined in h245com.h
|
|||
|
|
*/
|
|||
|
|
|
|||
|
|
HRESULT MLSE2_MaintenanceLoopOffCommandF(Object_t *pObject, PDU_t *pPdu)
|
|||
|
|
{
|
|||
|
|
ASSERT(pObject->Entity == MLSE_IN);
|
|||
|
|
ASSERT(pObject->State == MLSE_LOOPED);
|
|||
|
|
H245TRACE(pObject->dwInst, 2, "MLSE2_MaintenanceLoopOffCommand:%d", pObject->Key);
|
|||
|
|
|
|||
|
|
// Send RELEASE.indication to client
|
|||
|
|
pObject->State = MLSE_NOT_LOOPED;
|
|||
|
|
H245FsmIndication(pPdu, H245_IND_MLSE_RELEASE, pObject->pInstance, pObject->dwTransId, FSM_OK);
|
|||
|
|
|
|||
|
|
return 0;
|
|||
|
|
} // MLSE2_MaintenanceLoopOffCommand
|
|||
|
|
|