/**************************************************************************************************
  Filename:       rtg.h
  Revised:        $Date: 2010-10-19 12:38:16 -0700 (Tue, 19 Oct 2010) $
  Revision:       $Revision: 24150 $

  Description:    Interface to mesh routing functions


  Copyright 2004-2010 Texas Instruments Incorporated. All rights reserved.

  IMPORTANT: Your use of this Software is limited to those specific rights
  granted under the terms of a software license agreement between the user
  who downloaded the software, his/her employer (which must be your employer)
  and Texas Instruments Incorporated (the "License").  You may not use this
  Software unless you agree to abide by the terms of the License. The License
  limits your use, and you acknowledge, that the Software may not be modified,
  copied or distributed unless embedded on a Texas Instruments microcontroller
  or used solely and exclusively in conjunction with a Texas Instruments radio
  frequency transceiver, which is integrated into your product.  Other than for
  the foregoing purpose, you may not use, reproduce, copy, prepare derivative
  works of, modify, distribute, perform, display or sell this Software and/or
  its documentation for any purpose.

  YOU FURTHER ACKNOWLEDGE AND AGREE THAT THE SOFTWARE AND DOCUMENTATION ARE
  PROVIDED “AS IS” WITHOUT WARRANTY OF ANY KIND, EITHER EXPRESS OR IMPLIED, 
  INCLUDING WITHOUT LIMITATION, ANY WARRANTY OF MERCHANTABILITY, TITLE, 
  NON-INFRINGEMENT AND FITNESS FOR A PARTICULAR PURPOSE. IN NO EVENT SHALL
  TEXAS INSTRUMENTS OR ITS LICENSORS BE LIABLE OR OBLIGATED UNDER CONTRACT,
  NEGLIGENCE, STRICT LIABILITY, CONTRIBUTION, BREACH OF WARRANTY, OR OTHER
  LEGAL EQUITABLE THEORY ANY DIRECT OR INDIRECT DAMAGES OR EXPENSES
  INCLUDING BUT NOT LIMITED TO ANY INCIDENTAL, SPECIAL, INDIRECT, PUNITIVE
  OR CONSEQUENTIAL DAMAGES, LOST PROFITS OR LOST DATA, COST OF PROCUREMENT
  OF SUBSTITUTE GOODS, TECHNOLOGY, SERVICES, OR ANY CLAIMS BY THIRD PARTIES
  (INCLUDING BUT NOT LIMITED TO ANY DEFENSE THEREOF), OR OTHER SIMILAR COSTS.

  Should you have any questions regarding your right to use this Software,
  contact Texas Instruments Incorporated at www.TI.com. 
**************************************************************************************************/

#ifndef RTG_H
#define RTG_H

#ifdef __cplusplus
extern "C"
{
#endif

/*********************************************************************
 * INCLUDES
 */

#include "ZComDef.h"
#include "nwk_util.h"
#include "nwk_bufs.h"
#include "ZGlobals.h"

/*********************************************************************
 * MACROS
 */

/*********************************************************************
 * CONSTANTS
 */

#define RTG_TIMER_INTERVAL    1000

//Route request command option
#define MTO_ROUTE           0x01       // Used in option of NLME_RouteDiscoveryRequest() and rtgTable[]
#define NO_ROUTE_CACHE      0x02       // Used in option of NLME_RouteDiscoveryRequest() and rtgTable[]
#define RTG_RECORD          0x04       // Used in option of rtgTable[]
#define MTO_ROUTE_RC        0x08       // Sender has route cache. Used in option of rtgTable[]
#define MTO_ROUTE_NRC       0x10       // Sender doesn't have route cache. Used in option of rtgTable[]
#define DEST_IEEE_ADDR      0x20       // Used in option of route request command frame
#define MULTICAST_ROUTE     0x40       // Ued in all three places 
#define RREQ_OPTIONS_MASK   0x78       // b'0111,1000   0-2, 7 are reserved bits

#define RTG_MTO_DEST_ADDRESS   NWK_BROADCAST_SHORTADDR_DEVZCZR  //0xFFFC
  
#define RREP_ORI_IEEE       0x10
#define RREP_RES_IEEE       0x20 
#define RREP_MULTICAST      0x40
#define RREP_OPTIONS_MASK   (RREP_ORI_IEEE | RREP_RES_IEEE | RREP_MULTICAST)

#define RTG_END_DEVICE_ADDR_TYPE 0
#define RTG_ROUTER_ADDR_TYPE     1
  
#define RTG_NO_EXPIRY_TIME  0xFF

/*********************************************************************
 * TYPEDEFS
 */

typedef enum
{
  RTG_SUCCESS,
  RTG_FAIL,
  RTG_TBL_FULL,
  RTG_HIGHER_COST,
  RTG_NO_ENTRY,
  RTG_INVALID_PATH,
  RTG_INVALID_PARAM,
  RTG_SRC_TBL_FULL
} RTG_Status_t;

// status values for routing entries
#define RT_INIT       0
#define RT_ACTIVE     1
#define RT_DISC       2
#define RT_LINK_FAIL  3
#define RT_REPAIR     4

// Routing table entry
//   Notice, if you change this structure, you must also change
//   rtgItem_t in ZDProfile.h
typedef struct
{
  uint16  dstAddress;
  uint16  nextHopAddress;
  byte    expiryTime;
  byte    status;
  uint8   options;
} rtgEntry_t;

// Route discovery table entry
typedef struct
{
  byte    rreqId;
  uint16  srcAddress;
  uint16  previousNode;
  byte    forwardCost;
  byte    residualCost;
  byte    expiryTime;
} rtDiscEntry_t;

// Broadcast table entry.
typedef struct
{
  uint16 srcAddr;
  uint8  bdt; // broadcast delivery time
  uint8  pat; // passive ack timeout
  uint8  mbr; // max broadcast retries
  uint8  handle;
  // Count of non-sleeping neighbors and router children.
  uint8  ackCnt;
  uint8  id;
} bcastEntry_t;

// Source routing table
typedef struct
{
  uint8    expiryTime;
  uint8    relayCount;
  uint16   dstAddress; 
  uint16*  relayList;
} rtgSrcEntry_t;
/*********************************************************************
 * GLOBAL VARIABLES
 */

extern rtgEntry_t rtgTable[];
extern rtDiscEntry_t rtDiscTable[];

extern rtgSrcEntry_t rtgSrcTable[];

/*********************************************************************
 * FUNCTIONS
 */

extern void RTG_Init( void );

extern rtgEntry_t *RTG_GetRtgEntry( uint16 DstAddress, uint8 options);

extern RTG_Status_t RTG_RemoveRtgEntry( uint16 DstAddress, uint8 options );

extern uint16 RTG_GetNextHop( uint16 DstAddress, uint16 avoidAddr, 
                             uint16 avoidAddr2, uint16 avoidAddr3, uint8 options );

extern byte RTG_ProcessRreq(
           NLDE_FrameFormat_t *ff, uint16 macSrcAddress, uint16 *nextHopAddr );

extern void RTG_ProcessRrep( NLDE_FrameFormat_t *ff, uint16 macSrcAddress );

extern void RTG_ProcessRrec( NLDE_FrameFormat_t *ff );

extern uint8 RTG_ProcessRErr( NLDE_FrameFormat_t *ff );
extern void RTG_TimerEvent( void );

extern uint16 RTG_AllocNewAddress( byte deviceType );

extern void RTG_DeAllocTreeAddress( uint16 shortAddr );

extern void RTG_DeAllocStochasticAddress( uint16 shortAddr );

extern void RTG_BcastTimerHandler( void );

extern byte RTG_BcastChk( NLDE_FrameFormat_t *ff, uint16 macSrcAddr );

extern byte RTG_BcastAdd(NLDE_FrameFormat_t*ff, uint16 macSrcAddr, byte handle);

extern void RTG_BcastDel( byte handle );

extern void RTG_DataReq( osal_event_hdr_t *inMsg );

extern byte RTG_PoolAdd( NLDE_FrameFormat_t *ff );

extern uint16 RTG_GetTreeRoute( uint16 dstAddress );

extern uint16 RTG_SrcGetNextHop( uint8 rtgIndex, uint16* rtgList);

extern uint8 RTG_ValidateSrcRtg(uint8 relayCnt, uint8 relayIdx, uint16* relayList );

extern uint8 RTG_RtgRecordInitiation( uint16 DstAddress, uint16 SrcAddress, uint8 options);

extern RTG_Status_t RTG_GetRtgSrcEntry( uint16 dstAddr, uint8* pRelayCnt, uint16** ppRelayList);
extern RTG_Status_t RTG_CheckRtStatus( uint16 DstAddress, byte RtStatus, uint8 options );

extern uint8 RTG_ProcessRtDiscBits( uint8 rtDiscFlag, uint16 dstAddress, uint8* pSrcRtgSet, uint8 options );

extern uint8 RTG_RouteMaintanence( uint16 DstAddress, uint16 SrcAddress, uint8 options );

extern void RTG_FillCSkipTable( byte *children, byte *routers,
                                byte depth, uint16 *pTbl );


extern uint8 RTG_IsAncestor( uint16 deviceAddress  );

extern void RTG_SendBrokenRoute( uint16 nwkSrcAddr, uint16 nwkDstAddr, 
                   uint8 srcRouteSet, uint16 macSrcAddr, uint16 macDstAddr );

extern uint16 RTG_CalcTreeAddress(  byte deviceType );

extern uint16 RTG_GetStochastic( byte deviceType );

extern uint16 RTG_GetNextTreeHop( uint16 dstAddress );

extern uint16 RTG_ChildGetNextHop( uint16 DstAddr );

extern uint8 RTG_GetAncestors( uint16 dstAddr, uint16 ancestorAddr, uint16 *pRtgDst );

extern void RTG_nextHopIsBad( uint16 nextHop );

extern ZStatus_t RTG_SendRErr( uint16 SrcAddress, uint16 DstAddress, byte ErrorCode );


extern RTG_Status_t RTG_AddSrcRtgEntry_Guaranteed( uint16 srcAddr, uint8 relayCnt, uint16* pRelayList );

// Functions pointers for addressing schemes
extern uint16 (*pRTG_FinishGetNextHop)( uint16 DstAddress );
extern uint16 (*pRTG_GetNextTreeHop)( uint16 dstAddress );
extern uint16 (*pRTG_CalcAddress)( byte deviceType );
extern uint16 (*pRTG_GetTreeRoute)(uint16 dstAddress );
extern void (*pRTG_DeAllocAddress)( uint16 shortAddr );
extern uint8 (*pRTG_GetAncestors)( uint16 dstAddr, uint16 ancestorAddr, uint16 *pRtgDst );

extern void RTG_initRtgTable( void );

extern void RTG_MTORouteReq(void);

/*********************************************************************
*********************************************************************/
#ifdef __cplusplus
}
#endif

#endif /* RTG_H */