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546 lines
17 KiB
546 lines
17 KiB
/*
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* HrNetworkEntry.c v0.10
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* Generated in conjunction with Management Factory scripts:
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* script version: SNMPv1, 0.16, Apr 25, 1996
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* project: D:\TEMP\EXAMPLE\HOSTMIB
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****************************************************************************
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* *
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* (C) Copyright 1995 DIGITAL EQUIPMENT CORPORATION *
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* *
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* This software is an unpublished work protected under the *
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* the copyright laws of the United States of America, all *
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* rights reserved. *
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* *
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* In the event this software is licensed for use by the United *
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* States Government, all use, duplication or disclosure by the *
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* United States Government is subject to restrictions as set *
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* forth in either subparagraph (c)(1)(ii) of the Rights in *
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* Technical Data And Computer Software Clause at DFARS *
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* 252.227-7013, or the Commercial Computer Software Restricted *
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* Rights Clause at FAR 52.221-19, whichever is applicable. *
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* *
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****************************************************************************
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*
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* Facility:
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*
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* Windows NT SNMP Extension Agent
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*
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* Abstract:
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*
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* This module contains the code for dealing with the get, set, and
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* instance name routines for the HrNetworkEntry. Actual instrumentation code is
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* supplied by the developer.
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*
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* Functions:
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*
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* A get and set routine for each attribute in the class.
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*
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* The routines for instances within the class.
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*
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* Author:
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*
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* D. D. Burns @ Webenable Inc
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*
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* Revision History:
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*
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* V1.00 - 04/28/97 D. D. Burns Genned: Thu Nov 07 16:42:33 1996
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*
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*/
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#include <nt.h>
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#include <windef.h>
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#include <ntrtl.h>
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#include <nturtl.h>
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#include <windows.h>
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#include <malloc.h>
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#include <snmp.h>
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#include "mib.h"
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#include "smint.h"
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#include "hostmsmi.h"
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#include "user.h" /* Developer supplied include file */
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#include "HMCACHE.H" /* Cache-related definitions */
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#include "HRDEVENT.H" /* HrDevice Table-related definitions */
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#include "iphlpapi.h" /* Access to MIB2 Utility function */
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/*
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* GetHrNetworkIfIndex
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* The value of the ifIndex which corresponds to this network device.
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*
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* Gets the value for HrNetworkIfIndex.
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*
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* Arguments:
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*
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* outvalue address to return variable value
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* accesss Reserved for future security use
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* instance address of instance name as ordered native
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* data type(s)
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*
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* Return Codes:
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*
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* Standard PDU error codes.
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*
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* SNMP_ERRORSTATUS_NOERROR Successful get
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* SNMP_ERRORSTATUS_GENERR Catch-all failure code
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* mibtget.c v0.10
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*
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| =============== From WebEnable Design Spec Rev 3 04/11/97==================
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| hrNetworkIfIndex
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| ACCESS SYNTAX
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| read-only INTEGER
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| "The value of ifIndex which corresponds to this network device."
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| DISCUSSION:
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| <POA-13> A mechanism by which I can map a network interface device (as found
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| in the course of populating the hrDeviceTable) to the "ifIndex" value in
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| MIB-II needs to be described to me.
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| RESOLVED >>>>>>>>
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| <POA-13> We expose this info via MIB2UTIL.DLL.
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| RESOLVED >>>>>>>>
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|============================================================================
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| 1.3.6.1.2.1.25.3.4.1.1.<instance>
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| | | | |
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| | | | *-HrNetworkIfIndex
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| | | *-HrNetworkEntry
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| | *-HrNetworkTable
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| *-hrDevice
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*/
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UINT
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GetHrNetworkIfIndex(
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OUT Integer *outvalue ,
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IN Access_Credential *access ,
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IN InstanceName *instance )
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{
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ULONG index; /* As fetched from instance structure */
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CACHEROW *row; /* Row entry fetched from cache */
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/*
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| Grab the instance information
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*/
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index = GET_INSTANCE(0);
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/*
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| Use it to find the right entry in the cache
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*/
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if ((row = FindTableRow(index, &hrDevice_cache)) == NULL) {
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return SNMP_ERRORSTATUS_GENERR;
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}
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/*
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| By convention with "Gen_HrNetwork_Cache()", the "Hidden Context" attribute
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| for the selected row is the value to be returned by hrNetworkIfIndex.
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*/
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*outvalue = row->attrib_list[HIDDEN_CTX].u.unumber_value;
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return SNMP_ERRORSTATUS_NOERROR ;
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} /* end of GetHrNetworkIfIndex() */
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/*
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* HrNetworkEntryFindInstance
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*
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* This routine is used to verify that the specified instance is
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* valid.
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*
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* Arguments:
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*
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* FullOid Address for the full oid - group, variable,
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* and instance information
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* instance Address for instance specification as an oid
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*
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* Return Codes:
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*
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* SNMP_ERRORSTATUS_NOERROR Instance found and valid
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* SNMP_ERRORSTATUS_NOSUCHNAME Invalid instance
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*
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*/
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UINT
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HrNetworkEntryFindInstance( IN ObjectIdentifier *FullOid ,
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IN OUT ObjectIdentifier *instance )
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{
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UINT tmp_instance; /* Instance arc value */
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CACHEROW *row; /* Row entry fetched from cache */
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//
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// Developer instrumentation code to find appropriate instance goes here.
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// For non-tables, it is not necessary to modify this routine. However, if
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// there is any context that needs to be set, it can be done here.
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//
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if ( FullOid->idLength <= HRNETWORKENTRY_VAR_INDEX )
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// No instance was specified
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return SNMP_ERRORSTATUS_NOSUCHNAME ;
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else if ( FullOid->idLength != HRNETWORKENTRY_VAR_INDEX + 1 )
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// Instance length is more than 1
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return SNMP_ERRORSTATUS_NOSUCHNAME ;
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else
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// The only valid instance for a non-table are instance 0. If this
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// is a non-table, the following code validates the instances. If this
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// is a table, developer modification is necessary below.
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tmp_instance = FullOid->ids[ HRNETWORKENTRY_VAR_INDEX ] ;
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/*
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| For hrNetworkTable, the instance arc(s) is a single arc, and it must
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| correctly select an entry in the hrDeviceTable cache.
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| Check that here.
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*/
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if ( (row = FindTableRow(tmp_instance, &hrDevice_cache)) == NULL ) {
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return SNMP_ERRORSTATUS_NOSUCHNAME ;
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}
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else
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{
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/*
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| The instance arc selects an hrDeviceTable row entry, but is that
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| entry actually for a device of type "Network"?
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|
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| (We examine the last arc of the OID that specifies the device
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| type in the row entry selected by the instance arc).
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*/
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if (row->attrib_list[HRDV_TYPE].u.unumber_value !=
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HRDV_TYPE_LASTARC_NETWORK) {
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return SNMP_ERRORSTATUS_NOSUCHNAME;
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}
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// the instance is valid. Create the instance portion of the OID
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// to be returned from this call.
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instance->ids[ 0 ] = tmp_instance ;
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instance->idLength = 1 ;
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}
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return SNMP_ERRORSTATUS_NOERROR ;
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} /* end of HrNetworkEntryFindInstance() */
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/*
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* HrNetworkEntryFindNextInstance
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*
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* This routine is called to get the next instance. If no instance
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* was passed than return the first instance (1).
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*
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* Arguments:
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*
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* FullOid Address for the full oid - group, variable,
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* and instance information
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* instance Address for instance specification as an oid
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*
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* Return Codes:
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*
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* SNMP_ERRORSTATUS_NOERROR Instance found and valid
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* SNMP_ERRORSTATUS_NOSUCHNAME Invalid instance
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*
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*/
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UINT
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HrNetworkEntryFindNextInstance( IN ObjectIdentifier *FullOid ,
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IN OUT ObjectIdentifier *instance )
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{
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//
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// Developer supplied code to find the next instance of class goes here.
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// If this is a class with cardinality 1, no modification of this routine
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// is necessary unless additional context needs to be set.
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// If the FullOid does not specify an instance, then the only instance
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// of the class is returned. If this is a table, the first row of the
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// table is returned.
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//
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// If an instance is specified and this is a non-table class, then NOSUCHNAME
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// is returned so that correct MIB rollover processing occurs. If this is
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// a table, then the next instance is the one following the current instance.
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// If there are no more instances in the table, return NOSUCHNAME.
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//
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CACHEROW *row;
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ULONG tmp_instance;
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if ( FullOid->idLength <= HRNETWORKENTRY_VAR_INDEX )
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{
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/*
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| Too short: must return the instance arc that selects the first
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| entry in the table if there is one.
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*/
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tmp_instance = 0;
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}
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else {
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/*
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| There is at least one instance arc. Even if it is the only arc
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| we use it as the "index" in a request for the "NEXT" one.
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*/
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tmp_instance = FullOid->ids[ HRNETWORKENTRY_VAR_INDEX ] ;
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}
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/* Now go off and try to find the next instance in the table */
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if ((row = FindNextTableRow(tmp_instance, &hrDevice_cache)) == NULL) {
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return SNMP_ERRORSTATUS_NOSUCHNAME ;
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}
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/*
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| The instance arc selects an hrDeviceTable row entry, but is that
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| entry actually for a device of type "Network"?
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|
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| (We examine the last arc of the OID that specifies the device
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| type in the row entry selected by the instance arc).
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*/
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do {
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if (row->attrib_list[HRDV_TYPE].u.unumber_value ==
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HRDV_TYPE_LASTARC_NETWORK) {
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/* Found an hrDeviceTable entry for the right device type */
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break;
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}
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/* Step to the next row in the table */
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row = GetNextTableRow( row );
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}
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while ( row != NULL );
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/* If we found a proper device-type row . . . */
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if ( row != NULL) {
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instance->ids[ 0 ] = row->index ;
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instance->idLength = 1 ;
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}
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else {
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/*
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| Fell off the end of the hrDeviceTable without finding a row
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| entry that had the right device type.
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*/
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return SNMP_ERRORSTATUS_NOSUCHNAME ;
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}
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return SNMP_ERRORSTATUS_NOERROR ;
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} /* end of HrNetworkEntryFindNextInstance() */
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/*
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* HrNetworkEntryConvertInstance
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*
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* This routine is used to convert the object id specification of an
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* instance into an ordered native representation. The object id format
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* is that object identifier that is returned from the Find Instance
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* or Find Next Instance routines. It is NOT the full object identifier
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* that contains the group and variable object ids as well. The native
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* representation is an argc/argv-like structure that contains the
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* ordered variables that define the instance. This is specified by
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* the MIB's INDEX clause. See RFC 1212 for information about the INDEX
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* clause.
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*
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*
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* Arguments:
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*
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* oid_spec Address of the object id instance specification
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* native_spec Address to return the ordered native instance
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* specification
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*
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* Return Codes:
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*
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* SUCCESS Conversion complete successfully
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* FAILURE Unable to convert object id into native format
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*
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*/
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UINT
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HrNetworkEntryConvertInstance( IN ObjectIdentifier *oid_spec ,
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IN OUT InstanceName *native_spec )
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{
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static char *array; /* The address of this (char *) is passed back */
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/* as though it were an array of length 1 of these */
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/* types. */
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static ULONG inst; /* The address of this ULONG is passed back */
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/* (Obviously, no "free()" action is needed) */
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/* We only expect the one arc in "oid_spec" */
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inst = oid_spec->ids[0];
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array = (char *) &inst;
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native_spec->count = 1;
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native_spec->array = &array;
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return SUCCESS ;
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} /* end of HrNetworkEntryConvertInstance() */
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/*
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* HrNetworkEntryFreeInstance
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*
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* This routine is used to free an ordered native representation of an
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* instance name.
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*
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* Arguments:
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*
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* instance Address to return the ordered native instance
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* specification
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*
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* Return Codes:
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*
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*
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*/
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void
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HrNetworkEntryFreeInstance( IN OUT InstanceName *instance )
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{
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/* No action needed for hrNetwork Table */
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} /* end of HrNetworkEntryFreeInstance() */
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/*
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| End of Generated Code
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*/
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/* Gen_HrNetwork_Cache - Gen. a initial cache for HrDevice PROCESSOR Table */
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/* Gen_HrNetwork_Cache - Gen. a initial cache for HrDevice PROCESSOR Table */
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/* Gen_HrNetwork_Cache - Gen. a initial cache for HrDevice PROCESSOR Table */
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BOOL
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Gen_HrNetwork_Cache(
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ULONG type_arc
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)
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/*
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| EXPLICIT INPUTS:
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| "type_arc" is the number "n" to be used as the last arc in the
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| device-type OID:
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| 1.3.6.1.2.1.25.3.1.n
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| | | |
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| | | * Identifying arc for type
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| | *-hrDeviceTypes (OIDs specifying device types)
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| *-hrDevice
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| for devices created by this cache-population routine.
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| IMPLICIT INPUTS:
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| None.
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| OUTPUTS:
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| On Success:
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| Function returns TRUE indicating that the HrDevice cache has been fully
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| populated with all rows required for Network devices.
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| On any Failure:
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| Function returns FALSE (indicating "not enough storage" or other
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| internal logic error).
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|
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| THE BIG PICTURE:
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| At subagent startup time, the cache for each table in the MIB is
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| populated with rows for each row in the table. This function is
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| invoked by the start-up code in "Gen_HrDevice_Cache()" to
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| populate the cache for the HrDevice table with Network-device
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| specific entries.
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|
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| OTHER THINGS TO KNOW:
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|
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| Since all the attributes in the HrNetwork "sub" table are computed
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| upon request (based on cached information in a selected row in the
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| HrDevice table) there is no need to build a cache specifically for
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| this sub-table. (This routine is only loading the HrDevice cache.
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| --------
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|
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| This function holds a convention with the GET routines earlier in
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| this module that the "HIDDEN_CTX" attribute for Network-devices
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| contains a string that is the value of "hrNetworkIfIndex".
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|============================================================================
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| 1.3.6.1.2.1.25.3.4.1...
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| | | |
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| | | *-HrNetworkEntry
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| | *-HrNetworkTable
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| *-hrDevice
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*/
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{
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DWORD dwBytesRequired;
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MIB_IFTABLE *iftable; /* --> Heap storage containing table */
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UINT i; /* iftable index */
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|
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/*
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| We fetch the IfTable from the Mib2 subsection of the agent and for each
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| network interface (ie for every entry in the table) we create a row in
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| the hrDeviceTable.
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|
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| The HIDDEN_CTX attribute value in the row will simply be the "dwIndex"
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| entry in the from the iftable entry from which the row was generated.
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| This becomes the value of "hrNetworkIfIndex".
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*/
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/* Initialize */
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dwBytesRequired = 0;
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iftable = NULL;
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/* Ask for the size of the table from "iphlpapi" */
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if (GetIfTable(iftable, &dwBytesRequired, TRUE) != ERROR_INSUFFICIENT_BUFFER) {
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return ( FALSE );
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}
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/* Allocate necessary memory */
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if ((iftable = (MIB_IFTABLE *)malloc(dwBytesRequired)) == NULL) {
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return ( FALSE );
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}
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/* Ask for the table information from "iphlpapi" */
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if (GetIfTable(iftable, &dwBytesRequired, TRUE) != NO_ERROR ) {
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/* Release */
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free(iftable);
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/* Something blew */
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return ( FALSE );
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}
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/* Sweep thru any table creating hrDevice rows */
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for (i = 0; i < iftable->dwNumEntries; i += 1) {
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/*
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| "Hidden Context" is the ifTable index passed in from the GetIfTable()
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|
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| It will be returned as the value of "hrNetworkIfIndex" by the Get
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| function.
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*/
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if (AddHrDeviceRow(type_arc, // DeviceType OID Last-Arc
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(unsigned char *) &iftable->table[i].bDescr, // Device Description
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&iftable->table[i].dwIndex, // Hidden Ctx "index"
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CA_NUMBER // Hidden Ctx "type"
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) == NULL ) {
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/* Release */
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free(iftable);
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/* Something blew */
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return ( FALSE );
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}
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}
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/* Release */
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free(iftable);
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return ( TRUE );
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}
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