/*****************************************************************************

  FileName:		DMSStateTE.c

  Contents:		DMS-100 ISDN State Engine for TE (User Mode).

			The controlling state engine for Q.931 is the state engine
			on the NT side. The state engine on the TE side is a slave 
			of this. The TE side maintain it's own states as described in
			ITU-T Q931, but will in	raise conditions be overridden by 
			the NT side.

			This reference implementation uses a process per message,
			meaning that each message must check call states. This
			is easier for dialect maintenance as each message proc
			can be replaced individually. A new TE variant only
			need to copy the Q931CreateTE and replace those procs or
			need to override.

  License/Copyright:

  Copyright (c) 2007, Jan Vidar Berger, Case Labs, Ltd. All rights reserved.
  email:janvb@caselaboratories.com  

  Copyright (c) 2007, Michael Jerris. All rights reserved.
  email:mike@jerris.com  

  Redistribution and use in source and binary forms, with or without 
  modification, are permitted provided that the following conditions are 
  met:

	* Redistributions of source code must retain the above copyright notice, 
	  this list of conditions and the following disclaimer.
	* Redistributions in binary form must reproduce the above copyright notice, 
	  this list of conditions and the following disclaimer in the documentation 
	  and/or other materials provided with the distribution.
	* Neither the name of the Case Labs, Ltd nor the names of its contributors 
	  may be used to endorse or promote products derived from this software 
	  without specific prior written permission.

  THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" 
  AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 
  IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 
  ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE 
  LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 
  CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 
  SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 
  INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 
  CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 
  ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 
  POSSIBILITY OF SUCH DAMAGE.
*****************************************************************************/

#include "DMS.h"
extern L3INT Q931L4HeaderSpace;

/*****************************************************************************
  Function:		DMSCreateTE

  Description:	Will create the National TE as a Dialect in the stack. The first
				bulk set up the message handlers, the second bulk the IE
				encoders/coders, and the last bulk set up the state table.

  Parameters:	i		Dialect index
*****************************************************************************/
void DMSCreateTE(L3UCHAR i)
{
	Q931SetMesProc(Q931mes_ALERTING,             i, Q931ProcAlertingTE,          Q931Umes_Alerting,          Q931Pmes_Alerting);
	Q931SetMesProc(Q931mes_CALL_PROCEEDING,      i, Q931ProcCallProceedingTE,    Q931Umes_CallProceeding,    Q931Pmes_CallProceeding);
	Q931SetMesProc(Q931mes_CONNECT,              i, DMSProc0x07TE, 	             DMSUmes_0x07,               DMSPmes_0x07);
	Q931SetMesProc(Q931mes_CONNECT_ACKNOWLEDGE,  i, DMSProc0x0fTE, 	             DMSUmes_0x0f,               DMSPmes_0x0f);
	Q931SetMesProc(Q931mes_PROGRESS,             i, Q931ProcProgressTE,          Q931Umes_Progress,          Q931Pmes_Progress);
	Q931SetMesProc(Q931mes_SETUP,                i, Q931ProcSetupTE,             DMSUmes_Setup,              DMSPmes_Setup);
	Q931SetMesProc(Q931mes_SETUP_ACKNOWLEDGE,    i, Q931ProcSetupAckTE,          Q931Umes_SetupAck,          Q931Pmes_SetupAck);
	Q931SetMesProc(Q931mes_RESUME,               i, Q931ProcResumeTE,            Q931Umes_Resume,            Q931Pmes_Resume);
	Q931SetMesProc(Q931mes_RESUME_ACKNOWLEDGE,   i, Q931ProcResumeAckTE,         Q931Umes_ResumeAck,         Q931Pmes_ResumeAck);
	Q931SetMesProc(Q931mes_RESUME_REJECT,        i, Q931ProcResumeRejectTE,      Q931Umes_ResumeReject,      Q931Pmes_ResumeReject);
	Q931SetMesProc(Q931mes_SUSPEND,              i, Q931ProcSuspendTE,           Q931Umes_Suspend,           Q931Pmes_Suspend);
	Q931SetMesProc(Q931mes_SUSPEND_ACKNOWLEDGE,  i, Q931ProcSuspendAckTE,        Q931Umes_SuspendAck,        Q931Pmes_SuspendAck);
	Q931SetMesProc(Q931mes_SUSPEND_REJECT,       i, Q931ProcSuspendRejectTE,     Q931Umes_SuspendReject,     Q931Pmes_SuspendReject);
	Q931SetMesProc(Q931mes_USER_INFORMATION,     i, Q931ProcUserInformationTE,   Q931Umes_UserInformation,   Q931Pmes_UserInformation);
	Q931SetMesProc(Q931mes_DISCONNECT,           i, Q931ProcDisconnectTE,        Q931Umes_Disconnect,        Q931Pmes_Disconnect);
	Q931SetMesProc(Q931mes_RELEASE,              i, Q931ProcReleaseTE,           Q931Umes_Release,           Q931Pmes_Release);
	Q931SetMesProc(Q931mes_RELEASE_COMPLETE,     i, Q931ProcReleaseCompleteTE,   Q931Umes_ReleaseComplete,   Q931Pmes_ReleaseComplete);
	Q931SetMesProc(Q931mes_RESTART,              i, Q931ProcRestartTE,           Q931Umes_Restart,           Q931Pmes_Restart);
	Q931SetMesProc(Q931mes_RESTART_ACKNOWLEDGE,  i, Q931ProcRestartAckTE,        Q931Umes_RestartAck,        Q931Pmes_RestartAck);
	Q931SetMesProc(Q931mes_CONGESTION_CONTROL,   i, Q931ProcCongestionControlTE, Q931Umes_CongestionControl, Q931Pmes_CongestionControl);
	Q931SetMesProc(Q931mes_INFORMATION,          i, Q931ProcInformationTE,       Q931Umes_Information,       Q931Pmes_Information);
	Q931SetMesProc(Q931mes_NOTIFY,               i, Q931ProcNotifyTE,            Q931Umes_Notify,            Q931Pmes_Notify);
	Q931SetMesProc(Q931mes_STATUS,               i, Q931ProcStatusTE,            Q931Umes_Status,            Q931Pmes_Status);
	Q931SetMesProc(Q931mes_STATUS_ENQUIRY,       i, Q931ProcStatusEnquiryTE,     Q931Umes_StatusEnquiry,     Q931Pmes_StatusEnquiry);
	Q931SetMesProc(Q931mes_SEGMENT,              i, Q931ProcSegmentTE,           Q931Umes_Segment,           Q931Pmes_Segment);

	Q931SetMesProc(Q932mes_FACILITY,             i, Q932ProcFacilityTE,          Q932Umes_Facility,          Q932Pmes_Facility);
	Q931SetMesProc(Q932mes_HOLD,                 i, Q932ProcHoldTE,              Q932Umes_Hold,              Q932Pmes_Hold);
	Q931SetMesProc(Q932mes_HOLD_ACKNOWLEDGE,     i, Q932ProcHoldAckTE,           Q932Umes_HoldAck,           Q932Pmes_HoldAck);
	Q931SetMesProc(Q932mes_HOLD_REJECT,          i, Q932ProcHoldRejectTE,        Q932Umes_HoldReject,        Q932Pmes_HoldReject);
	Q931SetMesProc(Q932mes_REGISTER,             i, Q932ProcRegisterTE,          Q932Umes_Register,          Q932Pmes_Register);
	Q931SetMesProc(Q932mes_RETRIEVE,             i, Q932ProcRetrieveTE,          Q932Umes_Retrieve,          Q932Pmes_Retrieve);
	Q931SetMesProc(Q932mes_RETRIEVE_ACKNOWLEDGE, i, Q932ProcRetrieveAckTE,       Q932Umes_RetrieveAck,       Q932Pmes_RetrieveAck);
	Q931SetMesProc(Q932mes_RETRIEVE_REJECT,      i, Q932ProcRetrieveRejectTE,    Q932Umes_RetrieveReject,    Q932Pmes_RetrieveReject);

	/* Set up the IE encoder/decoder handle table.*/ 
	Q931SetIEProc(Q931ie_SEGMENTED_MESSAGE,                i, Q931Pie_Segment,       Q931Uie_Segment);
	Q931SetIEProc(Q931ie_BEARER_CAPABILITY,                i, Q931Pie_BearerCap,     Q931Uie_BearerCap);
	Q931SetIEProc(Q931ie_CAUSE,                            i, Q931Pie_Cause,         Q931Uie_Cause);
	Q931SetIEProc(Q931ie_CALL_IDENTITY,                    i, Q931Pie_CallID,        Q931Uie_CallID);
	Q931SetIEProc(Q931ie_CALL_STATE,                       i, Q931Pie_CallState,     Q931Uie_CallState);
	Q931SetIEProc(Q931ie_CHANGE_STATUS,                    i, Q931Pie_ChangeStatus,  Q931Uie_ChangeStatus);
	Q931SetIEProc(Q931ie_CHANNEL_IDENTIFICATION,           i, Q931Pie_ChanID,        Q931Uie_ChanID);
	Q931SetIEProc(Q931ie_PROGRESS_INDICATOR,               i, Q931Pie_ProgInd,       Q931Uie_ProgInd);
	Q931SetIEProc(Q931ie_NETWORK_SPECIFIC_FACILITIES,      i, Q931Pie_NetFac,        Q931Uie_NetFac);
	Q931SetIEProc(Q931ie_NOTIFICATION_INDICATOR,           i, Q931Pie_NotifInd,      Q931Uie_NotifInd);
	Q931SetIEProc(Q931ie_DISPLAY,                          i, Q931Pie_Display,       Q931Uie_Display);
	Q931SetIEProc(Q931ie_DATETIME,                         i, Q931Pie_DateTime,      Q931Uie_DateTime);
	Q931SetIEProc(Q931ie_KEYPAD_FACILITY,                  i, Q931Pie_KeypadFac,     Q931Uie_KeypadFac);
	Q931SetIEProc(Q931ie_SIGNAL,                           i, Q931Pie_Signal,        Q931Uie_Signal);
	Q931SetIEProc(Q931ie_TRANSIT_DELAY_SELECTION_AND_IND,  i, Q931Pie_TransNetSel,   Q931Uie_TransNetSel);
	Q931SetIEProc(Q931ie_CALLING_PARTY_NUMBER,             i, Q931Pie_CallingNum,    Q931Uie_CallingNum);
	Q931SetIEProc(Q931ie_CALLING_PARTY_SUBADDRESS,         i, Q931Pie_CallingSub,    Q931Uie_CallingSub);
	Q931SetIEProc(Q931ie_CALLED_PARTY_NUMBER,              i, Q931Pie_CalledNum,     Q931Uie_CalledNum);
	Q931SetIEProc(Q931ie_CALLED_PARTY_SUBADDRESS,          i, Q931Pie_CalledSub,     Q931Uie_CalledSub);
	Q931SetIEProc(Q931ie_TRANSIT_NETWORK_SELECTION,        i, Q931Pie_TransNetSel,   Q931Uie_TransNetSel);
	Q931SetIEProc(Q931ie_RESTART_INDICATOR,                i, Q931Pie_RestartInd,    Q931Uie_RestartInd);
	Q931SetIEProc(Q931ie_LOW_LAYER_COMPATIBILITY,          i, Q931Pie_LLComp,        Q931Uie_LLComp);
	Q931SetIEProc(Q931ie_HIGH_LAYER_COMPATIBILITY,         i, Q931Pie_HLComp,        Q931Uie_HLComp);
	Q931SetIEProc(Q931ie_USER_USER,                        i, Q931Pie_UserUser,      Q931Uie_UserUser);
	Q931SetIEProc(Q931ie_GENERIC_DIGITS,                   i, Q931Pie_GenericDigits, Q931Uie_GenericDigits);

	/* The following define a state machine. The point is that the Message	*/
	/* procs can when search this to find out if the message/state			*/
	/* combination is legale. If not, the proc for unexpected message apply.*/

	/* State 0 Idle */
	Q931AddStateEntry(i, Q931_U0, Q931mes_RESUME,           2);
	Q931AddStateEntry(i, Q931_U0, Q931mes_SETUP,            4);
	Q931AddStateEntry(i, Q931_U0, Q931mes_SETUP,            2);
	Q931AddStateEntry(i, Q931_U0, Q931mes_STATUS,           4);
	Q931AddStateEntry(i, Q931_U0, Q931mes_RELEASE,          4);
	Q931AddStateEntry(i, Q931_U0, Q931mes_RELEASE_COMPLETE, 4);

	/* State 1 Call Initiating */
	Q931AddStateEntry(i, Q931_U1, Q931mes_DISCONNECT,        2);
	Q931AddStateEntry(i, Q931_U1, Q931mes_SETUP_ACKNOWLEDGE, 4);
	Q931AddStateEntry(i, Q931_U1, Q931mes_RELEASE_COMPLETE,  4);
	Q931AddStateEntry(i, Q931_U1, Q931mes_CALL_PROCEEDING,   4);
	Q931AddStateEntry(i, Q931_U1, Q931mes_ALERTING,          4);
	Q931AddStateEntry(i, Q931_U1, Q931mes_CONNECT,           4);

	/* State 2 Overlap Sending */
	Q931AddStateEntry(i, Q931_U2, Q931mes_INFORMATION,     2);
	Q931AddStateEntry(i, Q931_U2, Q931mes_CALL_PROCEEDING, 4);
	Q931AddStateEntry(i, Q931_U2, Q931mes_ALERTING,        4);
	Q931AddStateEntry(i, Q931_U2, Q931mes_PROGRESS,        4);
	Q931AddStateEntry(i, Q931_U2, Q931mes_CONNECT,         4);
	Q931AddStateEntry(i, Q931_U2, Q931mes_RELEASE,         2);

	/* State 3 Outgoing Call Proceeding */
	Q931AddStateEntry(i, Q931_U3, Q931mes_PROGRESS, 4);
	Q931AddStateEntry(i, Q931_U3, Q931mes_ALERTING, 4);
	Q931AddStateEntry(i, Q931_U3, Q931mes_CONNECT,  4);
	Q931AddStateEntry(i, Q931_U3, Q931mes_RELEASE,  2);

	/* State 4 Call Delivered */
	Q931AddStateEntry(i, Q931_U4, Q931mes_CONNECT, 4);

	/* State 6 Call Precent */
	Q931AddStateEntry(i, Q931_U6, Q931mes_INFORMATION,      2);	
	Q931AddStateEntry(i, Q931_U6, Q931mes_ALERTING,         2);	
	Q931AddStateEntry(i, Q931_U6, Q931mes_CALL_PROCEEDING,  2);	
	Q931AddStateEntry(i, Q931_U6, Q931mes_CONNECT,          2);	
	Q931AddStateEntry(i, Q931_U6, Q931mes_RELEASE_COMPLETE, 2);	
	Q931AddStateEntry(i, Q931_U6, Q931mes_RELEASE,          4);	
	Q931AddStateEntry(i, Q931_U6, Q931mes_DISCONNECT,       4);	

	/* State 7 Call Received */
	Q931AddStateEntry(i, Q931_U7, Q931mes_CONNECT, 2);

	/* State 8 Connect request */
	Q931AddStateEntry(i, Q931_U8, Q931mes_CONNECT_ACKNOWLEDGE, 4);

	/* State 9 Incoming Call Proceeding */
	Q931AddStateEntry(i, Q931_U9, Q931mes_CONNECT,  2);
	Q931AddStateEntry(i, Q931_U9, Q931mes_ALERTING, 2);
	Q931AddStateEntry(i, Q931_U9, Q931mes_PROGRESS, 2);

	/* State 10 Active */
	Q931AddStateEntry(i, Q931_U10, Q931mes_SUSPEND, 2);
	Q931AddStateEntry(i, Q931_U10, Q931mes_NOTIFY,  4);
	Q931AddStateEntry(i, Q931_U10, Q931mes_NOTIFY,  2);

	/* State 11 Disconnect Request */
	Q931AddStateEntry(i, Q931_U11, Q931mes_RELEASE,    4);
	Q931AddStateEntry(i, Q931_U11, Q931mes_DISCONNECT, 4);
	Q931AddStateEntry(i, Q931_U11, Q931mes_NOTIFY,     4);

	/* State 12 Disconnect Ind */
	Q931AddStateEntry(i, Q931_U12, Q931mes_RELEASE,	4);
	Q931AddStateEntry(i, Q931_U12, Q931mes_RELEASE, 2);

	/* State 15 Suspend Request */
	Q931AddStateEntry(i, Q931_U15, Q931mes_SUSPEND_ACKNOWLEDGE, 4);
	Q931AddStateEntry(i, Q931_U15, Q931mes_SUSPEND_REJECT,      4);
	Q931AddStateEntry(i, Q931_U15, Q931mes_DISCONNECT,          4);
	Q931AddStateEntry(i, Q931_U15, Q931mes_RELEASE,             4);

/* TODO
	Q931AddStateEntry(i, Q931_U17,
	Q931AddStateEntry(i, Q931_U19,
	Q931AddStateEntry(i, Q931_U25,
*/
}

/*****************************************************************************

  Function:		DMSProc0x0fTE

*****************************************************************************/
L3INT DMSProc0x0fTE(Q931_TrunkInfo_t *pTrunk, L3UCHAR * buf, L3INT iFrom)
{
	Q931mes_Header *pMes = (Q931mes_Header *)&buf[Q931L4HeaderSpace];
	L3INT callIndex;
	L3INT ret = Q931E_NO_ERROR;

	if (pMes->ProtDisc == 8) {
		/* Find the call using CRV */
		ret = Q931FindCRV(pTrunk, pMes->CRV, &callIndex);
		if (ret != Q931E_NO_ERROR)
			return ret;

		/* TODO chack against state table for illegal or unexpected message here*/

		/* TODO - Set correct timer here */
		Q931StartTimer(pTrunk, callIndex, Q931_TIMER_T303);
	}
	if (iFrom == 4) {
		/* TODO Add proc here*/
		ret = Q931Tx32Data(pTrunk, 0, buf, pMes->Size);
	}
	else if (iFrom == 2) {
		/* TODO Add proc here*/
		ret = Q931Tx34(pTrunk, buf, pMes->Size);

		if (pMes->ProtDisc == 3 && pTrunk->autoServiceAck) {
			Q931AckService(pTrunk, buf);
		}
	}
	return ret;

}

/*****************************************************************************

  Function:		DMSProc0x07TE

*****************************************************************************/
L3INT DMSProc0x07TE(Q931_TrunkInfo_t *pTrunk, L3UCHAR * buf, L3INT iFrom)
{
	Q931mes_Header *pMes = (Q931mes_Header *)&buf[Q931L4HeaderSpace];
	L3INT callIndex;
	L3INT ret = Q931E_NO_ERROR;

	if (pMes->ProtDisc == 8) {
		/* Find the call using CRV */
		ret = Q931FindCRV(pTrunk, pMes->CRV, &callIndex);
		if (ret != Q931E_NO_ERROR)
			return ret;

		/* TODO chack against state table for illegal or unexpected message here*/

		/* TODO - Set correct timer here */
		Q931StartTimer(pTrunk, callIndex, Q931_TIMER_T303);
	}
	if (iFrom == 4) {
		/* TODO Add proc here*/
		ret = Q931Tx32Data(pTrunk, 0, buf, pMes->Size);
	}
	else if (iFrom == 2) {
		/* TODO Add proc here*/
		ret = Q931Tx34(pTrunk, buf, pMes->Size);
	}
	return ret;

}
