/*********************************************************************** * * * 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; }