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windows-nt/Source/XPSP1/NT/net/nwlink/ipx/receive.c

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2020-09-26 03:20:57 -05:00
/*++
Copyright (c) 1989-1993 Microsoft Corporation
Module Name:
receive.c
Abstract:
This module contains code which performs the following TDI services:
o TdiReceiveDatagram
Environment:
Kernel mode
Revision History:
--*/
#include "precomp.h"
#pragma hdrstop
VOID
IpxTransferDataComplete(
IN NDIS_HANDLE BindingContext,
IN PNDIS_PACKET NdisPacket,
IN NDIS_STATUS NdisStatus,
IN UINT BytesTransferred
)
/*++
Routine Description:
This routine receives control from the physical provider as an
indication that an NdisTransferData has completed. We use this indication
to complete any pended requests to our clients.
Arguments:
BindingContext - The Adapter Binding specified at initialization time.
NdisPacket/RequestHandle - An identifier for the request that completed.
NdisStatus - The completion status for the request.
BytesTransferred - Number of bytes actually transferred.
Return Value:
None.
--*/
{
PADAPTER Adapter = (PADAPTER)BindingContext;
PIPX_RECEIVE_RESERVED Reserved = (PIPX_RECEIVE_RESERVED)(NdisPacket->ProtocolReserved);
PREQUEST Request, LastRequest;
PADDRESS_FILE AddressFile;
ULONG ByteOffset;
PLIST_ENTRY p;
PDEVICE Device;
switch (Reserved->Identifier) {
case IDENTIFIER_IPX:
if (!Reserved->pContext) {
if (Reserved->SingleRequest) {
//
// The transfer was directly into the client buffer,
// so simply complete the request.
//
Request = Reserved->SingleRequest;
if (NdisStatus == NDIS_STATUS_SUCCESS) {
IPX_DEBUG (RECEIVE, ("Transferred %d bytes\n", BytesTransferred));
REQUEST_INFORMATION(Request) = BytesTransferred;
REQUEST_STATUS(Request) = STATUS_SUCCESS;
} else {
IPX_DEBUG (RECEIVE, ("Transfer failed\n"));
REQUEST_INFORMATION(Request) = 0;
REQUEST_STATUS(Request) = STATUS_ADAPTER_HARDWARE_ERROR;
}
LastRequest = Request;
Reserved->SingleRequest = NULL;
} else {
//
// Multiple clients requested this datagram. Save
// the last one to delay queueing it for completion.
//
LastRequest = LIST_ENTRY_TO_REQUEST (Reserved->Requests.Blink);
while (TRUE) {
p = RemoveHeadList (&Reserved->Requests);
if (p == &Reserved->Requests) {
break;
}
Request = LIST_ENTRY_TO_REQUEST(p);
AddressFile = REQUEST_OPEN_CONTEXT(Request);
if (AddressFile->ReceiveIpxHeader) {
ByteOffset = 0;
} else {
ByteOffset = sizeof(IPX_HEADER);
}
if (NdisStatus == NDIS_STATUS_SUCCESS) {
UINT BytesToTransfer = ((PTDI_REQUEST_KERNEL_RECEIVEDG)(REQUEST_PARAMETERS(Request)))->ReceiveLength;
if (BytesToTransfer == 0) {
BytesToTransfer= IpxGetChainedMDLLength(REQUEST_NDIS_BUFFER(Request));
}
#ifdef SUNDOWN
// assume offset will not exceed 2^32.
// REQUEST_INFORMATION(Request) is a ULONG_PTR
// we are save to cast its address to PULONG.
REQUEST_STATUS(Request) =
TdiCopyBufferToMdl(
Reserved->ReceiveBuffer->Data,
(ULONG) (ByteOffset + REQUEST_INFORMATION(Request)),
BytesToTransfer,
REQUEST_NDIS_BUFFER(Request),
0,
(PULONG) &REQUEST_INFORMATION(Request));
#else
REQUEST_STATUS(Request) =
TdiCopyBufferToMdl(
Reserved->ReceiveBuffer->Data,
ByteOffset + REQUEST_INFORMATION(Request),
BytesToTransfer,
REQUEST_NDIS_BUFFER(Request),
0,
&REQUEST_INFORMATION(Request));
#endif
} else {
REQUEST_INFORMATION(Request) = 0;
REQUEST_STATUS(Request) = STATUS_ADAPTER_HARDWARE_ERROR;
}
if (Request != LastRequest) {
IPX_INSERT_TAIL_LIST(
&Adapter->RequestCompletionQueue,
REQUEST_LINKAGE(Request),
Adapter->DeviceLock);
}
}
//
// Now free the receive buffer back.
//
IPX_PUSH_ENTRY_LIST(
&Adapter->ReceiveBufferList,
&Reserved->ReceiveBuffer->PoolLinkage,
&Adapter->Device->SListsLock);
Reserved->ReceiveBuffer = NULL;
}
} else {
//IpxPrint0("IpxTransferDataComplete: Calling PassDgToRt\n");
//ByteOffset = sizeof(IPX_HEADER);
ByteOffset = 0;
PassDgToRt(IpxDevice, Reserved->pContext, Reserved->Index,
&Reserved->ReceiveBuffer->Data[ByteOffset],
BytesTransferred);
//
// Free the memory allocated for options.
//
IpxFreeMemory(Reserved->pContext, sizeof(IPX_DATAGRAM_OPTIONS2),
MEMORY_PACKET, "RT OPTIONS");
//
// Now free the receive buffer back.
//
IPX_PUSH_ENTRY_LIST(
&Adapter->ReceiveBufferList,
&Reserved->ReceiveBuffer->PoolLinkage,
Adapter->DeviceLock);
Reserved->ReceiveBuffer = NULL;
}
//
// Now free the packet.
//
NdisReinitializePacket (NdisPacket);
if (Reserved->OwnedByAddress) {
// Reserved->Address->ReceivePacketInUse = FALSE;
InterlockedDecrement(&Reserved->Address->ReceivePacketInUse);
} else {
Device = Adapter->Device;
IPX_PUSH_ENTRY_LIST(
&Device->ReceivePacketList,
&Reserved->PoolLinkage,
&Device->SListsLock);
}
if (!Reserved->pContext) {
//
// We Delay inserting the last request (or the only one)
// until after we have put the packet back, to keep the
// address around if needed (the address won't go away
// until the last address file does, and the address file
// won't go away until the datagram is completed).
//
IPX_INSERT_TAIL_LIST(
&Adapter->RequestCompletionQueue,
REQUEST_LINKAGE(LastRequest),
Adapter->DeviceLock);
}
IpxReceiveComplete ((NDIS_HANDLE)Adapter);
break;
default:
Device = Adapter->Device;
(*Device->UpperDrivers[Reserved->Identifier].TransferDataCompleteHandler)(
NdisPacket,
NdisStatus,
BytesTransferred);
break;
}
} /* IpxTransferDataComplete */
VOID
IpxTransferData(
OUT PNDIS_STATUS Status,
IN NDIS_HANDLE NdisBindingHandle,
IN NDIS_HANDLE MacReceiveContext,
IN UINT ByteOffset,
IN UINT BytesToTransfer,
IN OUT PNDIS_PACKET Packet,
OUT PUINT BytesTransferred
)
/*++
Routine Description:
This routine is called by all tightly bound clients instead of NdisTransferData.
If this is a loopback packet, the transfer is done directly here, else NdisTransferData
is called.
Arguments:
Status - status of operation
NdisBindingHandle - Loopback cookie or Ndis context
MacReceiveContext - Loopback packet or Mac context
ByteOffset - Source offset
BytesToTransfer - length of the transfer desired
Packet - dest packet
BytesTransferred - length of successful transfer
Return Value:
NTSTATUS - status of operation.
--*/
{
//
// If this is a loopback packet, copy the data directly
//
if (NdisBindingHandle == (PVOID)IPX_LOOPBACK_COOKIE) {
IPX_DEBUG (LOOPB, ("LoopbXfer: src: %lx, dest: %lx, bytestoxfer: %lx\n",
MacReceiveContext, Packet, BytesToTransfer));
NdisCopyFromPacketToPacketSafe(
Packet, // Destination
0, // DestinationOffset
BytesToTransfer, // BytesToCopy
(PNDIS_PACKET)MacReceiveContext, // Source
ByteOffset, // SourceOffset
BytesTransferred, // BytesCopied
NormalPagePriority);
*Status = ((*BytesTransferred == BytesToTransfer)? NDIS_STATUS_SUCCESS : NDIS_STATUS_RESOURCES);
} else {
NdisTransferData(
Status,
NdisBindingHandle,
MacReceiveContext,
ByteOffset,
BytesToTransfer,
Packet,
BytesTransferred);
}
}
NTSTATUS
IpxTdiReceiveDatagram(
IN PREQUEST Request
)
/*++
Routine Description:
This routine performs the TdiReceiveDatagram request for the transport
provider. Receive datagrams just get queued up to an address, and are
completed when a DATAGRAM or DATAGRAM_BROADCAST frame is received at
the address.
Arguments:
Irp - I/O Request Packet for this request.
Return Value:
NTSTATUS - status of operation.
--*/
{
PADDRESS Address;
PADDRESS_FILE AddressFile;
IPX_DEFINE_SYNC_CONTEXT (SyncContext)
IPX_DEFINE_LOCK_HANDLE (LockHandle)
//
// Do a quick check of the validity of the address.
//
AddressFile = (PADDRESS_FILE)REQUEST_OPEN_CONTEXT(Request);
if ((AddressFile->Size != sizeof (ADDRESS_FILE)) ||
(AddressFile->Type != IPX_ADDRESSFILE_SIGNATURE)) {
return STATUS_INVALID_HANDLE;
}
Address = AddressFile->Address;
if ((Address == NULL) ||
(Address->Size != sizeof (ADDRESS)) ||
(Address->Type != IPX_ADDRESS_SIGNATURE)) {
return STATUS_INVALID_HANDLE;
}
IPX_BEGIN_SYNC (&SyncContext);
IPX_GET_LOCK (&Address->Lock, &LockHandle);
if (AddressFile->State != ADDRESSFILE_STATE_OPEN) {
IPX_FREE_LOCK (&Address->Lock, LockHandle);
IPX_END_SYNC (&SyncContext);
return STATUS_INVALID_HANDLE;
}
InsertTailList (&AddressFile->ReceiveDatagramQueue, REQUEST_LINKAGE(Request));
IoSetCancelRoutine (Request, IpxCancelReceiveDatagram);
if (Request->Cancel) {
(VOID)RemoveTailList (&AddressFile->ReceiveDatagramQueue);
IoSetCancelRoutine (Request, (PDRIVER_CANCEL)NULL);
IPX_FREE_LOCK (&Address->Lock, LockHandle);
IPX_END_SYNC (&SyncContext);
return STATUS_CANCELLED;
}
IPX_DEBUG (RECEIVE, ("RDG posted on %lx\n", AddressFile));
IpxReferenceAddressFileLock (AddressFile, AFREF_RCV_DGRAM);
IPX_FREE_LOCK (&Address->Lock, LockHandle);
IPX_END_SYNC (&SyncContext);
return STATUS_PENDING;
} /* IpxTdiReceiveDatagram */
VOID
IpxCancelReceiveDatagram(
IN PDEVICE_OBJECT DeviceObject,
IN PIRP Irp
)
/*++
Routine Description:
This routine is called by the I/O system to cancel a receive
datagram. The datagram is found on the address file's receive
datagram queue.
NOTE: This routine is called with the CancelSpinLock held and
is responsible for releasing it.
Arguments:
DeviceObject - Pointer to the device object for this driver.
Irp - Pointer to the request packet representing the I/O request.
Return Value:
none.
--*/
{
PLIST_ENTRY p;
PADDRESS_FILE AddressFile;
PADDRESS Address;
PREQUEST Request = (PREQUEST)Irp;
BOOLEAN Found;
IPX_DEFINE_LOCK_HANDLE (LockHandle)
CTEAssert ((REQUEST_MAJOR_FUNCTION(Request) == IRP_MJ_INTERNAL_DEVICE_CONTROL) &&
(REQUEST_MINOR_FUNCTION(Request) == TDI_RECEIVE_DATAGRAM));
CTEAssert (REQUEST_OPEN_TYPE(Request) == (PVOID)TDI_TRANSPORT_ADDRESS_FILE);
AddressFile = (PADDRESS_FILE)REQUEST_OPEN_CONTEXT(Request);
Address = AddressFile->Address;
Found = FALSE;
IPX_GET_LOCK (&Address->Lock, &LockHandle);
for (p = AddressFile->ReceiveDatagramQueue.Flink;
p != &AddressFile->ReceiveDatagramQueue;
p = p->Flink) {
if (LIST_ENTRY_TO_REQUEST(p) == Request) {
RemoveEntryList (p);
Found = TRUE;
break;
}
}
IPX_FREE_LOCK (&Address->Lock, LockHandle);
IoReleaseCancelSpinLock (Irp->CancelIrql);
if (Found) {
IPX_DEBUG(RECEIVE, ("Cancelled datagram on %lx\n", AddressFile));
REQUEST_INFORMATION(Request) = 0;
REQUEST_STATUS(Request) = STATUS_CANCELLED;
IpxCompleteRequest (Request);
ASSERT( DeviceObject->DeviceExtension == IpxDevice );
IpxFreeRequest(IpxDevice, Request);
IpxDereferenceAddressFile (AddressFile, AFREF_RCV_DGRAM);
}
} /* IpxCancelReceiveDatagram */
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