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gbeauche |
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/*
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* MibAccess.cpp
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*
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* The original code by Stas Khirman modified by Lauri Pesonen, December, 2000:
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*
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* SnmpUtilVarBindFree(), SnmpUtilOidNCmp() and SnmpUtilOidCpy() now loaded from
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* "snmpapi.dll" dynamically instead of linking statically.
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*
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* MibII ctor now takes a parameter whether to load Winsock or not.
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* WSAStartup maintains an internal reference counter so it would have been ok
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* to let it load always.
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*
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* Fixed a bug where the return value of LoadLibrary() was compared against
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* HINSTANCE_ERROR instead of NULL.
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*
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* Removed some type conversion warnings by casting.
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*
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* Added a check in MibExtLoad ctor that the function entry points were found.
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*
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* Added a check in GetIPMask() and GetIPAddress() that the library was loaded
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* before accessing the functions.
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*
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* Changed the return type of GetIPAddress() and GetIPMask() from BOOL to void
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* as they always returned TRUE.
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*
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*/
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/************************************************************************/
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/* Copyright (C) Stas Khirman 1998. All rights reserved. */
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/* Written by Stas Khirman (staskh@rocketmail.com). */
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/* and */
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/* Raz Galili (razgalili@hotmail.com) */
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/* */
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/* Free software: no warranty; use anywhere is ok; spread the */
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/* sources; note any modifications; share variations and */
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/* derivatives (including sending to staskh@rocketmail.com). */
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/* */
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/************************************************************************/
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/*
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* MibAccess.cpp - ip router
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*
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* Basilisk II (C) 1997-2001 Christian Bauer
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*
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* Windows platform specific code copyright (C) Lauri Pesonen
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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#include "sysdeps.h"
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#include "mibaccess.h"
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#include "..\dynsockets.h"
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#include "..\dump.h"
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#if DEBUG
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#pragma optimize("",off)
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#endif
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#include "debug.h"
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MibExtLoad::MibExtLoad( LPSTR MibDllName, LPSTR SnmpDllName )
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{
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m_Init = NULL;
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m_InitEx = NULL;
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m_Query = NULL;
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m_Trap = NULL;
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m_hInst_snmputil = NULL;
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m_SnmpUtilVarBindFree = NULL;
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m_SnmpUtilOidNCmp = NULL;
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m_SnmpUtilOidCpy = NULL;
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m_hInst = LoadLibrary( MibDllName );
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if(!m_hInst) {
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D(bug("MIB: library %s could not be loaded.\r\n", MibDllName));
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return;
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}
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D(bug("MIB: library %s loaded ok.\r\n", MibDllName));
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m_Init = (pSnmpExtensionInit)GetProcAddress(m_hInst ,"SnmpExtensionInit");
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m_InitEx= (pSnmpExtensionInitEx)GetProcAddress(m_hInst ,"SnmpExtensionInitEx");
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m_Query = (pSnmpExtensionQuery)GetProcAddress(m_hInst ,"SnmpExtensionQuery");
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m_Trap = (pSnmpExtensionTrap)GetProcAddress(m_hInst ,"SnmpExtensionTrap");
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if( !m_Init || !m_InitEx || !m_Query || !m_Trap )
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{
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D(bug("MIB: required entry points not found in library %s.\r\n", MibDllName));
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FreeLibrary( m_hInst );
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m_hInst = NULL;
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}
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m_hInst_snmputil = LoadLibrary( SnmpDllName );
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if(!m_hInst_snmputil){
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D(bug("MIB: library %s could not be loaded.\r\n", SnmpDllName));
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FreeLibrary( m_hInst );
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m_hInst = NULL;
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return;
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}
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D(bug("MIB: library %s loaded ok.\r\n", SnmpDllName));
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m_SnmpUtilVarBindFree = (VOID (SNMP_FUNC_TYPE *)(SnmpVarBind *))GetProcAddress( m_hInst_snmputil, "SnmpUtilVarBindFree" );
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m_SnmpUtilOidNCmp = (SNMPAPI (SNMP_FUNC_TYPE *)(AsnObjectIdentifier *, AsnObjectIdentifier *, UINT))GetProcAddress( m_hInst_snmputil, "SnmpUtilOidNCmp" );
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m_SnmpUtilOidCpy = (SNMPAPI (SNMP_FUNC_TYPE *)(AsnObjectIdentifier *, AsnObjectIdentifier *))GetProcAddress( m_hInst_snmputil, "SnmpUtilOidCpy" );
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if( !m_SnmpUtilVarBindFree || !m_SnmpUtilOidNCmp || !m_SnmpUtilOidCpy )
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{
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D(bug("MIB: required entry points not found in library %s.\r\n", SnmpDllName));
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FreeLibrary( m_hInst );
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FreeLibrary( m_hInst_snmputil );
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m_hInst = NULL;
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m_hInst_snmputil = NULL;
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}
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#undef SNMP_FreeVarBind
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#undef SNMP_oidncmp
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#undef SNMP_oidcpy
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#define SNMP_FreeVarBind m_SnmpUtilVarBindFree
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#define SNMP_oidncmp m_SnmpUtilOidNCmp
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#define SNMP_oidcpy m_SnmpUtilOidCpy
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}
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MibExtLoad::~MibExtLoad()
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{
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if( m_hInst ) {
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FreeLibrary( m_hInst );
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m_hInst = NULL;
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}
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if( m_hInst_snmputil ) {
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FreeLibrary( m_hInst_snmputil );
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m_hInst_snmputil = NULL;
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}
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}
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BOOL MibExtLoad::Init(DWORD dwTimeZeroReference,HANDLE *hPollForTrapEvent,AsnObjectIdentifier *supportedView)
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{
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if(m_hInst && m_Init)
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return m_Init(dwTimeZeroReference,hPollForTrapEvent,supportedView);
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return FALSE;
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}
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BOOL MibExtLoad::InitEx(AsnObjectIdentifier *supportedView)
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{
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if(m_hInst && m_InitEx)
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return m_InitEx(supportedView);
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return FALSE;
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}
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BOOL MibExtLoad::Query(BYTE requestType,OUT RFC1157VarBindList *variableBindings,
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AsnInteger *errorStatus,AsnInteger *errorIndex)
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{
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if(m_hInst && m_Query)
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return m_Query(requestType,variableBindings,errorStatus,errorIndex);
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return FALSE;
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}
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BOOL MibExtLoad::Trap(AsnObjectIdentifier *enterprise, AsnInteger *genericTrap,
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AsnInteger *specificTrap, AsnTimeticks *timeStamp,
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RFC1157VarBindList *variableBindings)
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{
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if(m_hInst && m_Trap)
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return m_Trap(enterprise, genericTrap,specificTrap, timeStamp, variableBindings);
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return FALSE;
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}
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MibII::MibII( bool load_winsock ):MibExtLoad("inetmib1.dll","snmpapi.dll")
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{
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WSADATA wsa;
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m_load_winsock = load_winsock;
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if(load_winsock) {
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int err = _WSAStartup( 0x0101, &wsa );
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}
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}
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MibII::~MibII()
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{
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if(m_load_winsock) _WSACleanup();
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}
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BOOL MibII::Init()
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{
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HANDLE PollForTrapEvent;
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AsnObjectIdentifier SupportedView;
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return MibExtLoad::Init(GetTickCount(),&PollForTrapEvent,&SupportedView);
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}
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void MibII::GetIPAddress( UINT IpArray[], UINT &IpArraySize )
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{
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if(!m_hInst) {
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IpArraySize = 0;
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return;
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}
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UINT OID_ipAdEntAddr[] = { 1, 3, 6, 1, 2, 1, 4 , 20, 1 ,1 };
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AsnObjectIdentifier MIB_ipAdEntAddr = { sizeof(OID_ipAdEntAddr)/sizeof(UINT), OID_ipAdEntAddr };
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RFC1157VarBindList varBindList;
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RFC1157VarBind varBind[1];
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AsnInteger errorStatus;
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AsnInteger errorIndex;
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AsnObjectIdentifier MIB_NULL = {0,0};
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BOOL Exit;
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int ret;
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int IpCount=0;
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DWORD dtmp;
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varBindList.list = varBind;
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varBindList.len = 1;
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varBind[0].name = MIB_NULL;
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SNMP_oidcpy(&varBind[0].name,&MIB_ipAdEntAddr);
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Exit = FALSE;
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IpCount=0;
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while(!Exit){
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ret = Query(ASN_RFC1157_GETNEXTREQUEST,&varBindList,&errorStatus,&errorIndex);
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if(!ret)
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Exit=TRUE;
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else{
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ret = SNMP_oidncmp(&varBind[0].name,&MIB_ipAdEntAddr,MIB_ipAdEntAddr.idLength);
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if(ret!=0){
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Exit=TRUE;
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}
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else{
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dtmp = *((DWORD *)varBind[0].value.asnValue.address.stream);
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IpArray[IpCount] = dtmp;
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IpCount++;
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if(IpCount>=(int)IpArraySize)
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Exit = TRUE;
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}
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}
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}
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IpArraySize = IpCount;
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SNMP_FreeVarBind(&varBind[0]);
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}
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void MibII::GetIPMask( UINT IpArray[], UINT &IpArraySize )
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{
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if(!m_hInst) {
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IpArraySize = 0;
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return;
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}
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UINT OID_ipAdEntMask[] = { 1, 3, 6, 1, 2, 1, 4 , 20, 1 ,3 };
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AsnObjectIdentifier MIB_ipAdEntMask = { sizeof(OID_ipAdEntMask)/sizeof(UINT), OID_ipAdEntMask };
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RFC1157VarBindList varBindList;
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RFC1157VarBind varBind[1];
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AsnInteger errorStatus;
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AsnInteger errorIndex;
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AsnObjectIdentifier MIB_NULL = {0,0};
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BOOL Exit;
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int ret;
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int IpCount=0;
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DWORD dtmp;
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varBindList.list = varBind;
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varBindList.len = 1;
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varBind[0].name = MIB_NULL;
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SNMP_oidcpy(&varBind[0].name,&MIB_ipAdEntMask);
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Exit = FALSE;
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IpCount=0;
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while(!Exit){
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ret = Query(ASN_RFC1157_GETNEXTREQUEST,&varBindList,&errorStatus,&errorIndex);
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if(!ret)
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Exit=TRUE;
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else{
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ret = SNMP_oidncmp(&varBind[0].name,&MIB_ipAdEntMask,MIB_ipAdEntMask.idLength);
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if(ret!=0){
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Exit=TRUE;
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}
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else{
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dtmp = *((DWORD *)varBind[0].value.asnValue.address.stream);
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IpArray[IpCount] = dtmp;
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IpCount++;
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if(IpCount>=(int)IpArraySize)
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Exit = TRUE;
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}
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}
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}
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IpArraySize = IpCount;
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SNMP_FreeVarBind(&varBind[0]);
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}
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