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

//

//      ./agent/current/src/mibgroup/mibII/system_mib.c

//

//

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

//####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

// Software Foundation; either version 2 or (at your option) any later version.

//

// eCos is distributed in the hope that it will be useful, but WITHOUT ANY

// WARRANTY; without even the implied warranty of MERCHANTABILITY or

// FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License

// for more details.

//

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

// with eCos; if not, write to the Free Software Foundation, Inc.,

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

//

// 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

// by itself cause the resulting work to be covered by the GNU General Public

// License. However the source code for this file must still be made available

// in accordance with section (3) of the GNU General Public License.

//

// This exception does not invalidate any other reasons why a work based on

// this file might be covered by the GNU General Public License.

//

// Alternative licenses for eCos may be arranged by contacting Red Hat, Inc.

// at http://sources.redhat.com/ecos/ecos-license/

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

//####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.

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

/*

 *  System MIB group implementation - system.c

 *

 */

#include <config.h>

#if HAVE_STDLIB_H

#include <stdlib.h>

#endif

#if HAVE_UNISTD_H

#include <unistd.h>

#endif

#if HAVE_STRING_H

#include <string.h>

#else

#include <strings.h>

#endif

#if HAVE_WINSOCK_H

#include <winsock.h>

#endif

#if HAVE_SYS_TIME_H

#include <sys/time.h>

#endif

#include <ctype.h>

#if HAVE_UTSNAME_H

#include <utsname.h>

#else

#if HAVE_SYS_UTSNAME_H

#include <sys/utsname.h>

#endif

#endif

#if HAVE_NETINET_IN_H

#include <netinet/in.h>

#endif

#if HAVE_DMALLOC_H

#include <dmalloc.h>

#endif

#include "mibincl.h"

#include "mibgroup/mibII/system_mib.h"

#include "mibgroup/struct.h"

#include "mibgroup/util_funcs.h"

#include "read_config.h"

#include "agent_read_config.h"

#include "system.h"

#include "mibgroup/mibII/sysORTable.h"

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

         *

         *  Kernel & interface information,

         *   and internal forward declarations

         *

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

#define SYS_STRING_LEN  256

char version_descr[ SYS_STRING_LEN ] = VERS_DESC;

char sysContact[    SYS_STRING_LEN ] = SYS_CONTACT;

char sysName[       SYS_STRING_LEN ] = SYS_NAME;

char sysLocation[   SYS_STRING_LEN ] = SYS_LOC;

char oldversion_descr[ SYS_STRING_LEN ];

char oldsysContact[    SYS_STRING_LEN ];

char oldsysName[       SYS_STRING_LEN ];

char oldsysLocation[   SYS_STRING_LEN ];

int sysServices=72;

int sysServicesConfiged=0;

extern oid version_id[];

extern int version_id_len;

extern struct timeval starttime;

WriteMethod writeSystem;

int header_system(struct variable *,oid *, size_t *, int, size_t *, WriteMethod **);

/* snmpd.conf config parsing */

void system_parse_config_sysloc(const char *token,

                                char *cptr)

{

  char tmpbuf[1024];

  if (strlen(cptr) < sizeof(sysLocation)) {

    strcpy(sysLocation,cptr);

  } else {

    sprintf(tmpbuf, "syslocation token too long (must be < %d):\n\t%s",

                 sizeof(sysLocation), cptr);

    config_perror(tmpbuf);

  }

}

void system_parse_config_sysServices(const char *token, char *cptr)

{

  sysServices = atoi(cptr);

  sysServicesConfiged = 1;

}

void system_parse_config_syscon(const char *token,

                                char *cptr)

{

  char tmpbuf[1024];

  if (strlen(cptr) < sizeof(sysContact)) {

    strcpy(sysContact,cptr);

  } else {

    sprintf(tmpbuf, "syscontact token too long (must be < %d):\n\t%s",

                 sizeof(sysContact), cptr);

    config_perror(tmpbuf);

  }

}

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

         *

         *  Initialisation & common implementation functions

         *

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

/* define the structure we're going to ask the agent to register our

   information at */

struct variable2 system_variables[] = {

    {VERSION_DESCR, ASN_OCTET_STR, RONLY, var_system, 1, {1}},

    {VERSIONID, ASN_OBJECT_ID, RONLY, var_system, 1, {2}},

    {UPTIME, ASN_TIMETICKS, RONLY, var_system, 1, {3}},

    {SYSCONTACT, ASN_OCTET_STR, RWRITE, var_system, 1, {4}},

    {SYSTEMNAME, ASN_OCTET_STR, RWRITE, var_system, 1, {5}},

    {SYSLOCATION, ASN_OCTET_STR, RWRITE, var_system, 1, {6}},

    {SYSSERVICES, ASN_INTEGER, RONLY, var_system, 1, {7}},

    {SYSORLASTCHANGE, ASN_TIMETICKS, RONLY, var_system, 1, {8}}

};

/* Define the OID pointer to the top of the mib tree that we're

   registering underneath */

oid system_variables_oid[] = { SNMP_OID_MIB2,1 };

oid system_module_oid[]    = { SNMP_OID_SNMPMODULES,1 };

int system_module_oid_len  = sizeof( system_module_oid ) / sizeof( oid );

int system_module_count    = 0;

void init_system_mib(void)

{

#ifdef HAVE_UNAME

  struct utsname utsName;

  uname(&utsName);

  sprintf(version_descr, "%s %s %s %s %s", utsName.sysname, utsName.nodename,

          utsName.release, utsName.version, utsName.machine);

#else

#if HAVE_EXECV

  struct extensible extmp;

  /* set default values of system stuff */

  sprintf(extmp.command,"%s -a",UNAMEPROG);

  /* setup defaults */

  extmp.type = EXECPROC;

  extmp.next = NULL;

  exec_command(&extmp);

  strncpy(version_descr,extmp.output, sizeof(version_descr));

  version_descr[strlen(version_descr)-1] = 0; /* chomp new line */

#else

#ifdef __ECOS

  sysServicesConfiged = 1; // May as well return the dummy value

#else

#endif // !__ECOS

#endif // !HAVE_EXECV

#endif // !HAVE_UNAME

#ifdef HAVE_GETHOSTNAME

  gethostname(sysName,sizeof(sysName));

#else

#ifdef HAVE_UNAME

  strncpy(sysName,utsName.nodename,sizeof(sysName));

#else

#if HAVE_EXECV

  sprintf(extmp.command,"%s -n",UNAMEPROG);

  /* setup defaults */

  extmp.type = EXECPROC;

  extmp.next = NULL;

  exec_command(&extmp);

  strncpy(sysName,extmp.output, sizeof(sysName));

  sysName[strlen(sysName)-1] = 0; /* chomp new line */

#endif /* HAVE_EXECV */

#endif /* HAVE_UNAME */

#endif /* HAVE_GETHOSTNAME */

  /* register ourselves with the agent to handle our mib tree */

  REGISTER_MIB("mibII/system", system_variables, variable2, \

               system_variables_oid);

  if ( ++system_module_count == 3 )

        REGISTER_SYSOR_ENTRY( system_module_oid,

                "The MIB module for SNMPv2 entities");

  /* register our config handlers */

  snmpd_register_config_handler("syslocation", system_parse_config_sysloc,

                                NULL, "location");

  snmpd_register_config_handler("syscontact", system_parse_config_syscon,

                                NULL,"contact-name");

  snmpd_register_config_handler("sysservices", system_parse_config_sysServices,

                                NULL,"NUMBER");

}

/*

  header_system(...

  Arguments:

  vp      IN      - pointer to variable entry that points here

  name    IN/OUT  - IN/name requested, OUT/name found

  length  IN/OUT  - length of IN/OUT oid's

  exact   IN      - TRUE if an exact match was requested

  var_len OUT     - length of variable or 0 if function returned

  write_method

*/

int

header_system(struct variable *vp,

              oid *name,

              size_t *length,

              int exact,

              size_t *var_len,

              WriteMethod **write_method)

{

#define SYSTEM_NAME_LENGTH      8

    oid newname[MAX_OID_LEN];

    int result;

    DEBUGMSGTL(("mibII/system", "var_system: "));

    DEBUGMSGOID(("mibII/system", name, *length));

    DEBUGMSG(("mibII/system"," %d\n", exact));

    memcpy((char *)newname, (char *)vp->name, vp->namelen * sizeof(oid));

    newname[SYSTEM_NAME_LENGTH] = 0;

    result = snmp_oid_compare(name, *length, newname, vp->namelen + 1);

    if ((exact && (result != 0)) || (!exact && (result >= 0)))

        return(MATCH_FAILED);

    memcpy( (char *)name,(char *)newname, (vp->namelen + 1) * sizeof(oid));

    *length = vp->namelen + 1;

    *write_method = 0;

    *var_len = sizeof(long);    /* default to 'long' results */

    return(MATCH_SUCCEEDED);

}

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

         *

         *  System specific implementation functions

         *      (actually common!)

         *

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

#ifdef USING_MIBII_SYSORTABLE_MODULE

extern struct timeval sysOR_lastchange;

#endif

u_char  *

var_system(struct variable *vp,

           oid *name,

           size_t *length,

           int exact,

           size_t *var_len,

           WriteMethod **write_method)

{

  struct timeval now, diff;

    if (header_system(vp, name, length, exact, var_len, write_method) == MATCH_FAILED )

        return NULL;

    switch (vp->magic){

        case VERSION_DESCR:

            *var_len = strlen(version_descr);

            *write_method = writeSystem;

            return (u_char *)version_descr;

        case VERSIONID:

            *var_len = version_id_len*sizeof(version_id[0]);

            return (u_char *)version_id;

        case UPTIME:

            gettimeofday(&now, NULL);

            now.tv_sec--;

            now.tv_usec += 1000000L;

            diff.tv_sec = now.tv_sec - starttime.tv_sec;

            diff.tv_usec = now.tv_usec - starttime.tv_usec;

            if (diff.tv_usec > 1000000L){

                diff.tv_usec -= 1000000L;

                diff.tv_sec++;

            }

            long_return = ((diff.tv_sec * 100) + (diff.tv_usec / 10000));

            return ((u_char *) &long_return);

        case SYSCONTACT:

            *var_len = strlen(sysContact);

            *write_method = writeSystem;

            return (u_char *)sysContact;

        case SYSTEMNAME:

            *var_len = strlen(sysName);

            *write_method = writeSystem;

            return (u_char *)sysName;

        case SYSLOCATION:

            *var_len = strlen(sysLocation);

            *write_method = writeSystem;

            return (u_char *)sysLocation;

        case SYSSERVICES:

#if NO_DUMMY_VALUES

            if (!sysServicesConfiged)

                return NULL;

#endif

            long_return = sysServices;

            return (u_char *)&long_return;

#ifdef USING_MIBII_SYSORTABLE_MODULE

        case SYSORLASTCHANGE:

              diff.tv_sec = sysOR_lastchange.tv_sec - 1 - starttime.tv_sec;

              diff.tv_usec =

                sysOR_lastchange.tv_usec + 1000000L - starttime.tv_usec;

              if (diff.tv_usec > 1000000L){

                diff.tv_usec -= 1000000L;

                diff.tv_sec++;

              }

              if ((diff.tv_sec * 100) + (diff.tv_usec / 10000) < 0)

                long_return = 0;

              else

                long_return = ((diff.tv_sec * 100) + (diff.tv_usec / 10000));

              return ((u_char *) &long_return);

#endif

        default:

            DEBUGMSGTL(("snmpd", "unknown sub-id %d in var_system\n", vp->magic));

    }

    return NULL;

}

int

writeSystem(int action,

            u_char *var_val,

            u_char var_val_type,

            size_t var_val_len,

            u_char *statP,

            oid *name,

            size_t name_len)

{

    u_char *cp;

    char *buf = NULL, *oldbuf = NULL;

    int count;

    switch((char)name[7]){

      case VERSION_DESCR:

        buf    = version_descr;

        oldbuf = oldversion_descr;

        break;

      case SYSCONTACT:

        buf    = sysContact;

        oldbuf = oldsysContact;

        break;

      case SYSTEMNAME:

        buf    = sysName;

        oldbuf = oldsysName;

        break;

      case SYSLOCATION:

        buf    = sysLocation;

        oldbuf = oldsysLocation;

        break;

      default:

        return SNMP_ERR_GENERR;         /* ??? */

    }

    switch ( action ) {

        case RESERVE1:          /* Check values for acceptability */

            if (var_val_type != ASN_OCTET_STR){

                snmp_log(LOG_ERR, "not string\n");

                return SNMP_ERR_WRONGTYPE;

            }

            if (var_val_len > sizeof(version_descr)-1){

                snmp_log(LOG_ERR, "bad length\n");

                return SNMP_ERR_WRONGLENGTH;

            }

            for(cp = var_val, count = 0; count < (int)var_val_len; count++, cp++){

                if (!isprint(*cp)){

                    snmp_log(LOG_ERR, "not print %x\n", *cp);

                    return SNMP_ERR_WRONGVALUE;

                }

            }

            break;

        case RESERVE2:          /* Allocate memory and similar resources */

                /* Using static strings, so nothing needs to be done */

            break;

        case ACTION:            /* Perform the SET action (if reversible) */

                /* Save the old value, in case of UNDO */

            strcpy( oldbuf, buf);

            memcpy( buf, var_val, var_val_len);

            buf[var_val_len] = 0;

            break;

        case UNDO:              /* Reverse the SET action and free resources */

            strcpy( buf, oldbuf);

            oldbuf[0] = 0;

            break;

        case COMMIT:            /* Confirm the SET, performing any irreversible actions,

                                        and free resources */

        case FREE:              /* Free any resources allocated */

                /* No resources have been allocated, but "empty" the 'oldbuf' */

            oldbuf[0] = 0;

            break;

    }

    return SNMP_ERR_NOERROR;

} /* end of writeSystem */

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

         *

         *  Internal implementation functions - None

         *

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