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/*
** Zabbix
** Copyright (C) 2001-2014 Zabbix SIA
**
** This program 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 of the License, or
** (at your option) any later version.
**
** This program 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 this program; if not, write to the Free Software
** Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
**/
#include "sysinc.h"
extern "C"
{
# include "common.h"
# include "sysinfo.h"
# include "log.h"
}
#include <comdef.h>
#include <Wbemidl.h>
#pragma comment(lib, "wbemuuid.lib")
static int com_initialized = 0;
extern "C" int zbx_co_initialize()
{
if (0 == com_initialized)
{
HRESULT hres;
hres = CoInitializeEx(0, COINIT_MULTITHREADED);
if (FAILED(hres))
{
zabbix_log(LOG_LEVEL_DEBUG, "cannot initialized COM library");
return FAIL;
}
/* initialize security */
hres = CoInitializeSecurity(NULL, -1, NULL, NULL, RPC_C_AUTHN_LEVEL_DEFAULT,
RPC_C_IMP_LEVEL_IMPERSONATE, NULL, EOAC_NONE, NULL);
if (FAILED(hres))
{
CoUninitialize();
zabbix_log(LOG_LEVEL_DEBUG, "cannot set default security levels for COM library");
return FAIL;
}
com_initialized = 1;
}
return SUCCEED;
}
extern "C" void zbx_co_uninitialize()
{
if (1 == com_initialized)
CoUninitialize();
}
extern "C" int WMI_GET(AGENT_REQUEST *request, AGENT_RESULT *result)
{
char *wmi_namespace, *wmi_query;
IWbemClassObject *pclsObj = 0;
ULONG uReturn = 0;
VARIANT vtProp;
IWbemLocator *pLoc = 0;
IWbemServices *pService = 0;
IEnumWbemClassObject* pEnumerator = 0;
HRESULT hres;
int ret = SYSINFO_RET_FAIL;
if (2 != request->nparam)
{
SET_MSG_RESULT(result, zbx_strdup(NULL, "Invalid number of parameters."));
return SYSINFO_RET_FAIL;
}
if (SUCCEED != zbx_co_initialize())
{
SET_MSG_RESULT(result, zbx_strdup(NULL, "Cannot initialize COM library."));
return SYSINFO_RET_FAIL;
}
wmi_namespace = get_rparam(request, 0);
wmi_query = get_rparam(request, 1);
VariantInit(&vtProp);
/* obtain the initial locator to Windows Management on a particular host computer */
hres = CoCreateInstance(CLSID_WbemLocator, 0, CLSCTX_INPROC_SERVER, IID_IWbemLocator, (LPVOID *) &pLoc);
if (FAILED(hres))
{
zabbix_log(LOG_LEVEL_DEBUG, "cannot obtain WMI locator service");
goto out;
}
hres = pLoc->ConnectServer(_bstr_t(wmi_namespace), NULL, NULL, 0, NULL, 0, 0, &pService);
if (FAILED(hres))
{
zabbix_log(LOG_LEVEL_DEBUG, "cannot obtain %s WMI service", wmi_namespace);
goto out;
}
/* set the IWbemServices proxy so that impersonation f the user (client) occurs */
hres = CoSetProxyBlanket(pService, RPC_C_AUTHN_WINNT, RPC_C_AUTHZ_NONE, NULL, RPC_C_AUTHN_LEVEL_CALL,
RPC_C_IMP_LEVEL_IMPERSONATE, NULL, EOAC_NONE);
if (FAILED(hres))
{
zabbix_log(LOG_LEVEL_DEBUG, "cannot set IWbemServices proxy");
goto out;
}
hres = pService->ExecQuery(_bstr_t("WQL"), _bstr_t(wmi_query),
WBEM_FLAG_FORWARD_ONLY | WBEM_FLAG_RETURN_IMMEDIATELY, NULL, &pEnumerator);
if (FAILED(hres))
{
zabbix_log(LOG_LEVEL_DEBUG, "failed to execute WMI query %s", wmi_query);
goto out;
}
hres = pEnumerator->Next(WBEM_INFINITE, 1, &pclsObj, &uReturn);
if (0 == uReturn)
goto out;
hres = pclsObj->BeginEnumeration(WBEM_FLAG_NONSYSTEM_ONLY);
if (FAILED(hres))
{
zabbix_log(LOG_LEVEL_DEBUG, "cannot start WMI query result enumeration");
goto out;
}
hres = pclsObj->Next(0, NULL, &vtProp, 0, 0);
pclsObj->EndEnumeration();
if (FAILED(hres) || hres == WBEM_S_NO_MORE_DATA)
{
goto out;
}
if (0 != (vtProp.vt & VT_ARRAY))
{
zabbix_log(LOG_LEVEL_DEBUG, "cannot convert WMI array result");
goto out;
}
switch(vtProp.vt)
{
case VT_EMPTY:
case VT_NULL:
goto out;
case VT_I8:
case VT_I4:
case VT_UI1:
case VT_I2:
case VT_I1:
case VT_UI2:
case VT_UI4:
case VT_UI8:
case VT_INT:
case VT_UINT:
hres = VariantChangeType(&vtProp, &vtProp, 0, VT_I8);
if (FAILED(hres))
{
zabbix_log(LOG_LEVEL_DEBUG, "cannot convert WMI result of type %d to VT_I8", vtProp.vt);
goto out;
}
SET_UI64_RESULT(result, vtProp.llVal);
ret = SYSINFO_RET_OK;
break;
case VT_R4:
case VT_R8:
hres = VariantChangeType(&vtProp, &vtProp, 0, VT_R8);
if (FAILED(hres))
{
zabbix_log(LOG_LEVEL_DEBUG, "cannot convert WMI result of type %d to VT_R8", vtProp.vt);
goto out;
}
SET_DBL_RESULT(result, vtProp.dblVal);
ret = SYSINFO_RET_OK;
break;
default:
hres = VariantChangeType(&vtProp, &vtProp, VARIANT_ALPHABOOL, VT_BSTR);
if (FAILED(hres))
{
zabbix_log(LOG_LEVEL_DEBUG, "cannot convert WMI result of type %d to VT_BSTR", vtProp.vt);
goto out;
}
SET_TEXT_RESULT(result, zbx_strdup(NULL, (char*)_bstr_t(vtProp.bstrVal)));
ret = SYSINFO_RET_OK;
break;
}
out:
VariantClear(&vtProp);
if (0 != pEnumerator)
pEnumerator->Release();
if( 0 != pService)
pService->Release();
if (0 != pLoc)
pLoc->Release();
if (SYSINFO_RET_FAIL == ret)
SET_MSG_RESULT(result, zbx_strdup(NULL, "Cannot obtain WMI information."));
return ret;
}
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