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/******************************************************************************
* * File: h245recv.c * * INTEL Corporation Proprietary Information * Copyright (c) 1994, 1995, 1996 Intel Corporation. * * This listing is supplied under the terms of a license agreement * with INTEL Corporation and may not be used, copied, nor disclosed * except in accordance with the terms of that agreement. * *****************************************************************************/
/******************************************************************************
* * $Workfile: h245recv.c $ * $Revision: 1.13 $ * $Modtime: 06 Feb 1997 18:17:22 $ * $Log: S:\sturgeon\src\h245\src\vcs\h245recv.c_v $ * * Fixed warnings. * * Rev 1.11 01 Nov 1996 15:24:56 EHOWARDX * * Added check for link not disconnected before re-posting receive buffer * to link layer to eliminate annoying error message from link layer. * * Rev 1.10 22 Jul 1996 17:33:42 EHOWARDX * Updated to latest Interop API. * * Rev 1.9 01 Jul 1996 16:14:32 EHOWARDX * locks * Added FunctionNotSupported if ossDecode fails. * * Rev 1.8 10 Jun 1996 16:53:46 EHOWARDX * Removed special handling of EndSession since shutdown moved to InstanceUnlo * * Rev 1.7 05 Jun 1996 17:14:28 EHOWARDX * Further work on converting to HRESULT; added PrintOssError to eliminate * pErrorString from instance structure. * * Rev 1.6 04 Jun 1996 18:18:16 EHOWARDX * Interop Logging changes inside #if defined(PCS_COMPLIANCE) conditionals. * * Rev 1.5 30 May 1996 23:39:10 EHOWARDX * Cleanup. * * Rev 1.4 28 May 1996 14:25:08 EHOWARDX * Tel Aviv update. * * Rev 1.3 21 May 1996 13:40:46 EHOWARDX * Added LOGGING switch to log PDUs to the file H245.OUT. * Add /D "LOGGING" to project options to enable this feature. * * Rev 1.2 17 May 1996 16:44:22 EHOWARDX * Changed to use LINK_RECV_CLOSED to signal link layer close. * * Rev 1.1 17 May 1996 16:20:32 EHOWARDX * Added code to change API state if zero-length buffer received * signalling link layer closed. * * Rev 1.0 09 May 1996 21:06:24 EHOWARDX * Initial revision. * * Rev 1.8.1.5 09 May 1996 19:33:58 EHOWARDX * Redesigned locking logic. * Simplified link API. * * Rev 1.17 29 Apr 1996 16:05:12 EHOWARDX * Added special case handling of EndSessionCommand to ReceiveComplete(). * * Rev 1.16 27 Apr 1996 21:13:14 EHOWARDX * Hope we finally got ossDecode() failure handling right... * * Rev 1.15 27 Apr 1996 13:08:54 EHOWARDX * Also need to terminate while loop if ossDecode fails! * * Rev 1.8.1.4 27 Apr 1996 11:25:36 EHOWARDX * Changed to not call FsmIncoming if ossDecode fails... * * * Rev 1.8.1.3 25 Apr 1996 21:26:46 EHOWARDX * Changed to use pInstance->p_ossWorld instead of bAsnInitialized. * * Rev 1.8.1.2 23 Apr 1996 14:44:30 EHOWARDX * Updated. * * Rev 1.8.1.1 15 Apr 1996 15:12:00 EHOWARDX * Updated. * * Rev 1.8.1.0 26 Mar 1996 19:15:24 EHOWARDX * * Commented out hTraceFile for H.323 * * Rev 1.8 21 Mar 1996 17:21:36 dabrown1 * * - put in test1/2 trace fdwrite * * Rev 1.7 13 Mar 1996 11:31:56 DABROWN1 * * Enable logging for ring0 * * Rev 1.6 06 Mar 1996 13:13:04 DABROWN1 * * flush receive buffer functionality * * Rev 1.5 01 Mar 1996 17:25:54 DABROWN1 * * moved oss 'world' context to h245instance * changed oss delete from ossFreeBuf to ossFreePDU * * Rev 1.4 23 Feb 1996 13:56:04 DABROWN1 * * added H245TRACE / ASSERT calls * * Rev 1.3 21 Feb 1996 12:09:56 EHOWARDX * Eliminated unused local variables. * * Rev 1.2 21 Feb 1996 08:25:08 DABROWN1 * * Provide multiple buffers receiving > 1 message (ie., link ACKs). * * Rev 1.1 13 Feb 1996 14:46:06 DABROWN1 * * changed asnexp.h (no longer there) to fsmexp.h * * Rev 1.0 09 Feb 1996 17:36:20 cjutzi * Initial revision. * *****************************************************************************/#ifndef STRICT
#define STRICT
#endif
/***********************//* SYSTEM INCLUDES *//***********************/#include <stdio.h>
#include <stdlib.h>
#include <stddef.h>
#include <limits.h>
#include "precomp.h"
/***********************//* H245 INCLUDES *//***********************/#ifdef _IA_SPOX_
# define _DLL
#endif //_IA_SPOX_
#include "h245com.h"
#include "sr_api.h"
#if defined(_DEBUG) || defined(PCS_COMPLIANCE)
#include "interop.h"
#include "h245plog.h"
extern LPInteropLogger H245Logger;#endif // (PCS_COMPLIANCE)
#ifdef _IA_SPOX_
# undef _DLL
#endif //_IA_SPOX_
/**************************************************************************
** Function : h245ReceiveComplete** Description : Receive Completion Callback routine from link layer***************************************************************************/
HRESULTH245FunctionNotSupported(struct InstanceStruct *pInstance, unsigned short wChoice, unsigned char *pBuf, unsigned uLength){ HRESULT status = H245_ERROR_OK; MltmdSystmCntrlMssg *pPdu = NULL;
pPdu = (MltmdSystmCntrlMssg *) MemAlloc(sizeof(MltmdSystmCntrlMssg)); if(NULL != pPdu) { memset(pPdu, 0, sizeof(MltmdSystmCntrlMssg));
pPdu->choice = indication_chosen; pPdu->u.indication.choice = IndicationMessage_functionNotSupported_chosen; pPdu->u.indication.u.functionNotSupported.cause.choice = wChoice; if (pBuf != NULL && uLength != 0) { pPdu->u.indication.u.functionNotSupported.bit_mask = returnedFunction_present; pPdu->u.indication.u.functionNotSupported.returnedFunction.length = (WORD)uLength; pPdu->u.indication.u.functionNotSupported.returnedFunction.value = pBuf; } else { pPdu->u.indication.u.functionNotSupported.bit_mask = 0; }
status = sendPDU(pInstance, pPdu); MemFree(pPdu); pPdu = NULL; } else { status = H245_ERROR_NOMEM; }
return status;} // H245FunctionNotSupported()
void h245ReceiveComplete(DWORD_PTR h245Inst, HRESULT dwMessage, PBYTE pbDataBuf, DWORD dwLength){ struct InstanceStruct *pInstance; int pduNum = MltmdSystmCntrlMssg_PDU; ASN1_BUF Asn1Buf; MltmdSystmCntrlMssg *pPdu; int nRet;
// Validate the instance handle
pInstance = InstanceLock(h245Inst); if (pInstance == NULL) { H245TRACE(h245Inst, 1, "h245ReceiveComplete: Instance not found"); return; }
// ONLY submit buffers to the decoder if it's for data received,
// skip for flushes
switch (dwMessage) { case LINK_RECV_CLOSED: H245TRACE(h245Inst, 3, "h245ReceiveComplete: Link Layer closed"); pInstance->API.SystemState = APIST_Disconnected; InstanceUnlock(pInstance); return;
case LINK_RECV_DATA:
if (pInstance->pWorld == NULL) { H245TRACE(h245Inst, 1, "h245ReceiveComplete: ASN.1 Decoder not initialized"); InstanceUnlock(pInstance); return; }
switch (pInstance->Configuration) { case H245_CONF_H324: Asn1Buf.value = &pbDataBuf[2]; Asn1Buf.length = dwLength; break;
default: Asn1Buf.value = pbDataBuf; Asn1Buf.length = dwLength; } // switch
// Loop around as long as the length field is positive.
// ASN.1 decoder will update the length for each PDU it decodes until
// a 0 length is achieved.
while (Asn1Buf.length > 0) { int savePduLength = Asn1Buf.length; PBYTE savePdu = Asn1Buf.value; pPdu = NULL;
#if defined(_DEBUG) || defined(PCS_COMPLIANCE)
if (H245Logger) InteropOutput(H245Logger, (BYTE FAR *)Asn1Buf.value, (int)Asn1Buf.length, H245LOG_RECEIVED_PDU);#endif // (PCS_COMPLIANCE)
nRet = H245_Decode(pInstance->pWorld, (void **)&pPdu, pduNum, &Asn1Buf);
if (ASN1_SUCCEEDED(nRet)) { // Decode succeeded
H245TRACE(h245Inst, 3, "H.245 Msg decode successful");
// Pass on data to finite state machine
FsmIncoming(pInstance, pPdu); } else { // Decode failed
H245FunctionNotSupported(pInstance, syntaxError_chosen, savePdu, savePduLength); Asn1Buf.length = 0; // Terminate loop!
}
if (pPdu != NULL) { // Free the memory used by the ASN.1 library
if (freePDU(pInstance->pWorld, pduNum, pPdu, H245ASN_Module)) { H245TRACE(h245Inst, 1, "SR: FREE FAILURE"); } } } // while (Asn1Buf.length > 0)
if (pInstance->API.SystemState != APIST_Disconnected) { // Repost the buffer to the data link layer
pInstance->SendReceive.hLinkReceiveReq(pInstance->SendReceive.hLinkLayerInstance, pbDataBuf, pInstance->SendReceive.dwPDUSize); } break; // case LINK_RECV_DATA
case LINK_RECV_ABORT: // Receive buffer flush in process
ASSERT(pbDataBuf != NULL); H245TRACE(h245Inst, 3, "SR: RX Flush Buffer"); break;
case LINK_FLUSH_COMPLETE: // Receive buffer flush done
ASSERT(pbDataBuf == NULL); H245TRACE(h245Inst, 3, "SR: RX Flush Complete"); pInstance->SendReceive.dwFlushMap &= ~DATALINK_RECEIVE; break;
default: H245TRACE(h245Inst, 1, "SR: RX COMPLETE Error %d", dwMessage); break; } // switch
InstanceUnlock(pInstance);}
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