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//==========================================================================

//

//      ./lib/current/include/lcd_time.h

//

//

//==========================================================================

//####ECOSGPLCOPYRIGHTBEGIN####

// -------------------------------------------

// This file is part of eCos, the Embedded Configurable Operating System.

// Copyright (C) 1998, 1999, 2000, 2001, 2002 Red Hat, Inc.

//

// eCos is free software; you can redistribute it and/or modify it under

// the terms of the GNU General Public License as published by the Free

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// You should have received a copy of the GNU General Public License along

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// 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.

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// As a special exception, if other files instantiate templates or use macros

// or inline functions from this file, or you compile this file and link it

// with other works to produce a work based on this file, this file does not

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// -------------------------------------------

//####ECOSGPLCOPYRIGHTEND####

//####UCDSNMPCOPYRIGHTBEGIN####

//

// -------------------------------------------

//

// Portions of this software may have been derived from the UCD-SNMP

// project,  <http://ucd-snmp.ucdavis.edu/>  from the University of

// California at Davis, which was originally based on the Carnegie Mellon

// University SNMP implementation.  Portions of this software are therefore

// covered by the appropriate copyright disclaimers included herein.

//

// The release used was version 4.1.2 of May 2000.  "ucd-snmp-4.1.2"

// -------------------------------------------

//

//####UCDSNMPCOPYRIGHTEND####

//==========================================================================

//#####DESCRIPTIONBEGIN####

//

// Author(s):    hmt

// Contributors: hmt

// Date:         2000-05-30

// Purpose:      Port of UCD-SNMP distribution to eCos.

// Description:  

//              

//

//####DESCRIPTIONEND####

//

//==========================================================================

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

       Copyright 1989, 1991, 1992 by Carnegie Mellon University

                          Derivative Work -

Copyright 1996, 1998, 1999, 2000 The Regents of the University of California

                         All Rights Reserved

Permission to use, copy, modify and distribute this software and its

documentation for any purpose and without fee is hereby granted,

provided that the above copyright notice appears in all copies and

that both that copyright notice and this permission notice appear in

supporting documentation, and that the name of CMU and The Regents of

the University of California not be used in advertising or publicity

pertaining to distribution of the software without specific written

permission.

CMU AND THE REGENTS OF THE UNIVERSITY OF CALIFORNIA DISCLAIM ALL

WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING ALL IMPLIED

WARRANTIES OF MERCHANTABILITY AND FITNESS.  IN NO EVENT SHALL CMU OR

THE REGENTS OF THE UNIVERSITY OF CALIFORNIA BE LIABLE FOR ANY SPECIAL,

INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING

FROM THE LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF

CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN

CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.

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

/*

 * lcd_time.h

 */

#ifndef _LCD_TIME_H

#define _LCD_TIME_H

#ifdef __cplusplus

extern "C" {

#endif

/* undefine to enable time synchronization only on authenticated packets */

#define LCD_TIME_SYNC_OPT 1

/*

 * Macros and definitions.

 */

#define ETIMELIST_SIZE  23

typedef struct enginetime_struct {

        u_char          *engineID;

        u_int            engineID_len;

        u_int            engineTime;

        u_int            engineBoot;

                /* Time & boots values received from last authenticated

                 *   message within the previous time window.

                 */

        time_t           lastReceivedEngineTime;

                /* Timestamp made when engineTime/engineBoots was last

                 *   updated.  Measured in seconds.

                 */

#ifdef LCD_TIME_SYNC_OPT        

        u_int  authenticatedFlag;

#endif      

        struct enginetime_struct        *next;

} enginetime, *Enginetime;

/*

 * Macros for streamlined engineID existence checks --

 *

 *      e       is char *engineID,

 *      e_l     is u_int engineID_len.

 *

 *

 *  ISENGINEKNOWN(e, e_l)

 *      Returns:

 *              TRUE    If engineID is recoreded in the EngineID List;

 *              FALSE   Otherwise.

 *

 *  ENSURE_ENGINE_RECORD(e, e_l)

 *      Adds the given engineID to the EngineID List if it does not exist

 *              already.  engineID is added with a <enginetime, engineboots>

 *              tuple of <0,0>.  ALWAYS succeeds -- except in case of a

 *              fatal internal error.

 *      Returns:

 *              SNMPERR_SUCCESS On success;

 *              SNMPERR_GENERR  Otherwise.

 *

 *  MAKENEW_ENGINE_RECORD(e, e_l)

 *      Returns:

 *              SNMPERR_SUCCESS If engineID already exists in the EngineID List;

 *              SNMPERR_GENERR  Otherwise -and- invokes ENSURE_ENGINE_RECORD()

 *                                      to add an entry to the EngineID List.

 *

 * XXX  Requres the following declaration in modules calling ISENGINEKNOWN():

 *      static u_int    dummy_etime, dummy_eboot;

 */

#define ISENGINEKNOWN(e, e_l)                                   \

        ( (get_enginetime(e, e_l,                               \

                &dummy_eboot, &dummy_etime, TRUE) == SNMPERR_SUCCESS)   \

                ? TRUE                                          \

                : FALSE )

#define ENSURE_ENGINE_RECORD(e, e_l)                            \

        ( (set_enginetime(e, e_l, 0, 0, FALSE) == SNMPERR_SUCCESS)        \

                ? SNMPERR_SUCCESS                               \

                : SNMPERR_GENERR )

#define MAKENEW_ENGINE_RECORD(e, e_l)                           \

        ( (ISENGINEKNOWN(e, e_l) == TRUE)                       \

                ? SNMPERR_SUCCESS                               \

                : (ENSURE_ENGINE_RECORD(e, e_l), SNMPERR_GENERR) )

/*

 * Prototypes.

 */

int      get_enginetime (u_char *engineID, u_int  engineID_len,

                             u_int *engine_boot, u_int *engine_time,

                             u_int authenticated);

int      get_enginetime_ex (u_char *engineID, u_int  engineID_len,

                            u_int *engine_boot, u_int *engine_time,

                            u_int *last_engine_time,

                            u_int authenticated);

int      set_enginetime (u_char *engineID, u_int engineID_len,

                             u_int   engine_boot, u_int engine_time,

                             u_int authenticated);

Enginetime

         search_enginetime_list (       u_char          *engineID,

                                        u_int            engineID_len);

int      hash_engineID (u_char *engineID, u_int engineID_len);

void     dump_etimelist_entry (Enginetime e, int count);

void     dump_etimelist (void);

#ifdef __cplusplus

}

#endif

#endif /* _LCD_TIME_H */