NDIS_STATUS NDIS_API PacketReceiveIndicate(IN NDIS_HANDLE ProtocolBindingContext,
IN NDIS_HANDLE MacReceiveContext,
IN PVOID HeaderBuffer,
IN UINT HeaderBufferSize,
IN PVOID LookaheadBuffer,
IN UINT LookaheadBufferSize,
IN UINT PacketSize)
{
// upcall on packet arrival
POPEN_INSTANCE Open;
PLIST_ENTRY PacketListEntry;
PNDIS_PACKET pPacket;
NDIS_STATUS Status;
UINT BytesTransfered = 0;
PPACKET_RESERVED pReserved;
if (HeaderBufferSize != ETHERNET_HEADER_LENGTH)
return NDIS_STATUS_NOT_ACCEPTED;
Open = (POPEN_INSTANCE) ProtocolBindingContext;
// See if there are any pending reads that we can satisfy
NdisAcquireSpinLock(&Open->RcvQSpinLock); // fixed 5.11.97
if (IsListEmpty(&Open->RcvList)) {
NdisReleaseSpinLock(&Open->RcvQSpinLock);
return NDIS_STATUS_NOT_ACCEPTED;
}
PacketListEntry = RemoveHeadList(&Open->RcvList);
NdisReleaseSpinLock(&Open->RcvQSpinLock);
pReserved = CONTAINING_RECORD(PacketListEntry, PACKET_RESERVED, ListElement);
pPacket = CONTAINING_RECORD(pReserved, NDIS_PACKET, ProtocolReserved);
// Copy the MAC header
NdisMoveMemory(RESERVED(pPacket)->lpBuffer, HeaderBuffer, HeaderBufferSize);
// Call the Mac to transfer the data portion of the packet
NdisTransferData(&Status, Open->AdapterHandle, MacReceiveContext, 0, PacketSize, pPacket, &BytesTransfered);
if (Status == NDIS_STATUS_PENDING)
return NDIS_STATUS_PENDING;
if (Status == NDIS_STATUS_SUCCESS) {
PacketTransferDataComplete(Open, pPacket, Status, BytesTransfered);
return NDIS_STATUS_SUCCESS;
}
PacketTransferDataComplete(Open, pPacket, Status, 0);
return NDIS_STATUS_SUCCESS;
}
VOID NDIS_API PacketUnbindAdapter(OUT PNDIS_STATUS Status,
IN POPEN_INSTANCE Open,
IN POPEN_INSTANCE junk)
{
// detach protocol from the NIC clean up any pending I/O requests
PLIST_ENTRY PacketListEntry;
PNDIS_PACKET pPacket;
// The open instance of the device is about to close
// We need to complete all pending I/O requests
// First we complete any pending read requests
NdisAcquireSpinLock(&Open->RcvQSpinLock);
while (!IsListEmpty(&Open->RcvList)) {
PacketListEntry = RemoveHeadList(&Open->RcvList);
pPacket = CONTAINING_RECORD(PacketListEntry, NDIS_PACKET, ProtocolReserved);
// complete normally
PacketTransferDataComplete(Open, pPacket, NDIS_STATUS_SUCCESS, 0);
}
NdisReleaseSpinLock(&Open->RcvQSpinLock);
// close the adapter
NdisCloseAdapter(Status, Open->AdapterHandle);
// Save status returned from NdisCloseAdapter for completion routine
Open->Status = *Status;
if (*Status != NDIS_STATUS_PENDING)
PacketUnbindAdapterComplete(Open, *Status);
}
/************************************************************
Function that frees the pending requests
************************************************************/
VOID
PacketCleanUp( PNDIS_STATUS Status,
POPEN_INSTANCE Open )
{
PLIST_ENTRY PacketListEntry;
PNDIS_PACKET pPacket;
PPACKET_RESERVED Reserved;
TRACE_ENTER( "Cleanup" );
/*clean all the pending requests*/
NdisAcquireSpinLock( &(Open->RcvQSpinLock) );
while( (PacketListEntry = PacketRemoveHeadList( &(Open->RcvList) )) != NULL )
{
IF_VERY_LOUD( "CleanUp - Completing read" );
Reserved = CONTAINING_RECORD( PacketListEntry, PACKET_RESERVED, ListElement );
pPacket = CONTAINING_RECORD( Reserved, NDIS_PACKET, ProtocolReserved );
/*emulate the end of a transfer to wake the processes that
are waiting on a request */
PacketTransferDataComplete( Open, pPacket, NDIS_STATUS_SUCCESS, 0 );
}
NdisReleaseSpinLock( &(Open->RcvQSpinLock) );
TRACE_LEAVE( "Cleanup" );
return;
}
NDIS_STATUS
PacketReceiveIndicate (
IN NDIS_HANDLE ProtocolBindingContext,
IN NDIS_HANDLE MacReceiveContext,
IN PVOID HeaderBuffer,
IN UINT HeaderBufferSize,
IN PVOID LookAheadBuffer,
IN UINT LookaheadBufferSize,
IN UINT PacketSize
)
{
POPEN_INSTANCE open;
PIO_STACK_LOCATION irpSp;
PIRP irp;
PLIST_ENTRY packetListEntry;
PNDIS_PACKET pPacket;
ULONG sizeToTransfer;
NDIS_STATUS status;
UINT bytesTransfered = 0;
ULONG bufferLength;
PPACKET_RESERVED reserved;
PMDL pMdl;
// DebugPrint(("ReceiveIndicate\n"));
open= (POPEN_INSTANCE)ProtocolBindingContext;
if (HeaderBufferSize > ETHERNET_HEADER_LENGTH) {
return NDIS_STATUS_SUCCESS;
}
// See if there are any pending read that we can satisfy
packetListEntry = ExInterlockedRemoveHeadList( &open->RcvList, &open->RcvQSpinLock );
if (packetListEntry == NULL) {
// DebugPrint(("No pending read, dropping packets\n"));
return NDIS_STATUS_NOT_ACCEPTED;
}
reserved = CONTAINING_RECORD(packetListEntry,PACKET_RESERVED,ListElement);
pPacket = CONTAINING_RECORD(reserved,NDIS_PACKET,ProtocolReserved);
irp = RESERVED(pPacket)->Irp;
irpSp = IoGetCurrentIrpStackLocation(irp);
// We don't have to worry about the situation where the IRP is cancelled
// after we remove it from the queue and before we reset the cancel
// routine because the cancel routine has been coded to cancel an IRP
// only if it's in the queue.
IoSetCancelRoutine(irp, NULL);
bufferLength = irpSp->Parameters.Read.Length-ETHERNET_HEADER_LENGTH;
sizeToTransfer = (PacketSize < bufferLength) ? PacketSize : bufferLength;
NdisMoveMappedMemory(
MmGetSystemAddressForMdlSafe(irp->MdlAddress, NormalPagePriority),
HeaderBuffer,
HeaderBufferSize
);
pMdl=IoAllocateMdl(
MmGetMdlVirtualAddress(irp->MdlAddress),
MmGetMdlByteCount(irp->MdlAddress),
FALSE,
FALSE,
NULL
);
if (pMdl == NULL) {
// DebugPrint(("Packet: Read-Failed to allocate Mdl\n"));
status = NDIS_STATUS_RESOURCES;
goto ERROR;
}
IoBuildPartialMdl(
irp->MdlAddress,
pMdl,
((PUCHAR)MmGetMdlVirtualAddress(irp->MdlAddress))+ETHERNET_HEADER_LENGTH,
0
);
pMdl->Next = NULL;
RESERVED(pPacket)->pMdl=pMdl;
NdisChainBufferAtFront(pPacket,pMdl);
NdisTransferData(
&status,
open->AdapterHandle,
MacReceiveContext,
0,
sizeToTransfer,
pPacket,
&bytesTransfered
);
if (status == NDIS_STATUS_PENDING) {
return NDIS_STATUS_SUCCESS;
}
ERROR:
PacketTransferDataComplete( open, pPacket, status, bytesTransfered );
return NDIS_STATUS_SUCCESS;
}
