怎么在驱动中设网卡为混杂模式

as title

大侠，我也有同样的问题啊，不过我的问题是调试无法通过。我在passthru里的minihook.c 的ntstatus后面那个传说中可以加入自己对网卡模式设置的地方加入以下代码，但是有错误
DIS_STATUS
MPSetInformation(
IN NDIS_HANDLE MiniportAdapterContext,
IN NDIS_OID Oid,
IN PVOID InformationBuffer,
IN ULONG InformationBufferLength,
OUT PULONG BytesRead,
OUT PULONG BytesNeeded
)
{//my code start here
NDIS_STATUS st;
NDIS_REQUEST *pRequest;
NDIS_OID oiddata;
PADAPT pAdapt;
/*
{
UINT i;
PADAPT pAdapt;
NDIS_STATUS Status = NDIS_STATUS_FAILURE;
NDIS_STATUS BundleStatus = NDIS_STATUS_FAILURE;
NDIS_STRING BundleUniString;
KIRQL OldIrql;

DBGPRINT(\"==>Passthru Initialize Miniport\\n\");
}
*/
oiddata=NDIS_PACKET_TYPE_PROMISCUOUS;

/*设置为混杂模式*/
pRequest=ExAllocatePool(NonPagedPool,sizeof(NDIS_REQUEST));//分配内存
if(NULL==pRequest)
{
DBGPRINT(\"Can not allocate buffer for requestn\");
}
pRequest->RequestType=NdisRequestSetInformation;//设置请求命令
pRequest->DATA.SET_INFORMATION.Oid=OID_GEN_CURRENT_PACKET_FILTER;
pRequest->DATA.SET_INFORMATION.InformationBuffer=&oiddata;
pRequest->DATA.SET_INFORMATION.InformationBufferLength=sizeof(NDIS_OID);

NdisRequest(&st,pAdapt->BindingHandle,pRequest);//发送请求
if(st!=NDIS_STATUS_PENDING)
{
if(pRequest){
DBGPRINT(\"Free request\\n\");
ExFreePool(pRequest);
}
}
...
调试过后出现了pAdapt没有初始化的错误，大侠知道怎么回事么，谢谢了先！！！！！