Win32_NetworkAdapterConfiguration

[Codeplug]

pInClass will be NULL if there are no input parameters to the method. What method are you trying to get that has input parameters?

Start a new thread next time - instead of reviving an 11 year old thread

gg

[z160896]

This is the section code:

BSTR MethodName = SysAllocString(L"EnableDHCP");
// BSTR MethodName = SysAllocString(L"EnableStatic");
IWbemClassObject * pInClass = NULL;
IWbemClassObject * pInInst = NULL;
IWbemClassObject * pOutInst = NULL;
IWbemClassObject * pvClass = NULL;

VARIANT pathVar;
hres = pSvc->GetObject(L"Win32_NetworkAdapterConfiguration", 0, NULL, &pvClass, NULL);

if( hres != WBEM_S_NO_ERROR )
{
plogfile->WriteError(_T("Network: Failed to query Win32_NetworkAdapterConfiguration, error code: %x\r\n"), hres);
SysFreeString(MethodName);
return hres;
}


hres = pvClass->GetMethod(MethodName, 0, &pInClass, NULL);
if( hres != WBEM_S_NO_ERROR )
{
plogfile->WriteError(_T("Network: Failed to EnableDHCP method, error code: %x\r\n"), hres);
SysFreeString(MethodName);
return hres;
}

If the method name is EnableStatic, pInClass is valid pointer. Any methods related to DHCP for exampe, ReleaseDHCPLease, will return with pInClass as NULL.

pInClass will be NULL if there are no input parameters to the method. What method are you trying to get that has input parameters?

Start a new thread next time - instead of reviving an 11 year old thread

gg

[z160896]

I found out the issue. As EnableDHCP doesn't require parameter inputs, pvClass->GetMethod(MethodName, 0, &pInClass, NULL); returns with NULL pointer for pInClass.

This is the section code:

BSTR MethodName = SysAllocString(L"EnableDHCP");
// BSTR MethodName = SysAllocString(L"EnableStatic");
IWbemClassObject * pInClass = NULL;
IWbemClassObject * pInInst = NULL;
IWbemClassObject * pOutInst = NULL;
IWbemClassObject * pvClass = NULL;

VARIANT pathVar;
hres = pSvc->GetObject(L"Win32_NetworkAdapterConfiguration", 0, NULL, &pvClass, NULL);

if( hres != WBEM_S_NO_ERROR )
{
plogfile->WriteError(_T("Network: Failed to query Win32_NetworkAdapterConfiguration, error code: %x\r\n"), hres);
SysFreeString(MethodName);
return hres;
}


hres = pvClass->GetMethod(MethodName, 0, &pInClass, NULL);
if( hres != WBEM_S_NO_ERROR )
{
plogfile->WriteError(_T("Network: Failed to EnableDHCP method, error code: %x\r\n"), hres);
SysFreeString(MethodName);
return hres;
}

If the method name is EnableStatic, pInClass is valid pointer. Any methods related to DHCP for exampe, ReleaseDHCPLease, will return with pInClass as NULL.