snmp_varlist_add_variable

fab casta <[email protected]> Tue, 25 Jul 2006 14:56:57 +0000 (GMT)

Newsgroups	gmane.network.net-snmp.user
Message-ID	<[email protected]>

Hello,
 
I have two processes:
- one sending traps
- one receiving traps
 
To send the traps, I use the function snmp_varlist_add_variable : refeers to the file example.c (included file)
 
the questions are:
-----------------
 I would like to find in the RFC, the "requirement" that precise that when a oid is added through the function snmp_varlist_add_variable (for NET-SMNP v2 if possible...)
-- if it's a simple data, the '0' must be sent. 
For example if the following data sent, the 0 is compulsary
  oid lruSysName_oid[] = { 1, 3, 6, 1, 4, 1, 16727, 2, 2, 1, 1, 1, 1, 0 };
 
-- if it's a data from an array, the 'index' must be sent. 
For example if the following data sent, the _index is compulsary
  oid lruFaultIndex_oid[] = { 1, 3, 6, 1, 4, 1, 16727, 2, 2, 1, 1, 13, 2, 1, 1, _index };
 
 
I hope i'm enought clear!!
 
thanks for your help 
Casta

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example_trap.c (text/plain, 4.1 KB)

//! OID for snmptrap

static oid snmptrap_oid[] = { 1, 3, 6, 1, 6, 3, 1, 1, 4, 1, 0 };

ECODE send_lruMIBFaultTrap_trap(STD_UnsignedInteger32 p_index,
                                BIT_PLruFaultRecType  p_faultDescript,
                                struct snmp_session *p_session)
{
  ///////////////////////
  //    Declaration    //
  ///////////////////////

  netsnmp_variable_list _tempList;
  netsnmp_variable_list *_returnVar;

  netsnmp_variable_list *var_list = NULL;
  STD_SignedInteger32   _ret      = 0;
  STD_UnsignedInteger32 _upTime   = 0;
  netsnmp_pdu _pdu;
  netsnmp_pdu *_pduPtr;
  STD_UnsignedInteger32 _index    = p_index + 1;


  oid sysUptimeOid[] =
    { 1, 3, 6, 1, 2, 1, 1, 3, 0 };
  oid             lruMIBFaultTrap_oid[] =
    { 1, 3, 6, 1, 4, 1, 16727, 2, 2, 1, 2, 1, 0, 8 };
  oid             lruSysName_oid[] =
    { 1, 3, 6, 1, 4, 1, 16727, 2, 2, 1, 1, 1, 1, 0 };
  oid             lruSysIpAddress_oid[] =
    { 1, 3, 6, 1, 4, 1, 16727, 2, 2, 1, 1, 1, 8, 0 };
  oid             lruFaultIndex_oid[] =
    { 1, 3, 6, 1, 4, 1, 16727, 2, 2, 1, 1, 13, 2, 1, 1, _index };

  // Added variables

//!!!!!!!!!!!!!!!!!!!!!
// CODE DELETED : not usefull for this example
//!!!!!!!!!!!!!!!!!!!!!

  /////////////////////////
  //    Initialization   //
  /////////////////////////

//!!!!!!!!!!!!!!!!!!!!!
// CODE DELETED : not usefull for this example
//!!!!!!!!!!!!!!!!!!!!!
 

  ///////////////////////
  //     Algorithm     //
  ///////////////////////

  // Data recoverage

//!!!!!!!!!!!!!!!!!!!!!
// CODE DELETED : not usefull for this example
//!!!!!!!!!!!!!!!!!!!!!


  _pduPtr = snmp_pdu_create(SNMP_MSG_TRAP2);
  if ( _pduPtr == NULL)
    {
      _rc = (ECODE)-1;
    }
  else
    {
      _upTime = netsnmp_get_agent_uptime();

      if ( _returnVar != NULL)
        {
          // First put the sysuptime
          _returnVar = snmp_varlist_add_variable(&var_list,
                                                 sysUptimeOid,
                                                 OID_LENGTH(sysUptimeOid),
                                                 ASN_TIMETICKS,
                                                 (u_char *)&_upTime,
                                                 sizeof(_upTime));
        }
      if ( _returnVar != NULL)
        {
          /*
           * Set the snmpTrapOid.0 value
           */
          _returnVar = snmp_varlist_add_variable(&var_list,
                                                 snmptrap_oid,
                                                 OID_LENGTH(snmptrap_oid),
                                                 ASN_OBJECT_ID,
                                                 (u_char *)lruMIBFaultTrap_oid,
                                                 sizeof(lruMIBFaultTrap_oid));
        }

      if ( _returnVar != NULL)
        {
          _returnVar =
            snmp_varlist_add_variable(&var_list,
                                      lruSysName_oid,
                                      OID_LENGTH(lruSysName_oid),
                                      ASN_OCTET_STR,
                                      _hostName,
                                      strnlen(_hostName,STD_STRING_CAPACITY));
        }
      if ( _returnVar != NULL)
        {
          _returnVar =
            snmp_varlist_add_variable(&var_list,
                                      lruSysIpAddress_oid,
                                      OID_LENGTH(lruSysIpAddress_oid),
                                      ASN_IPADDRESS,
                                      (u_char *)&_hostIfInfo.ifTable[0].ipAddr,
                                      sizeof(struct in_addr));

        }
      if ( _returnVar != NULL)
        {
          _returnVar =
            snmp_varlist_add_variable(&var_list,
                                      lruFaultIndex_oid,
                                      OID_LENGTH(lruFaultIndex_oid),
                                      ASN_INTEGER,
                                      (u_char*)&_index,
                                      sizeof(STD_UnsignedInteger32));
        }


//!!!!!!!!!!!!!!!!!!!!!
// CODE DELETED : not usefull for this example
//!!!!!!!!!!!!!!!!!!!!!

  }