| 1 |
/* |
| 2 |
* b2ether driver -- derived from DDK packet driver sample |
| 3 |
* |
| 4 |
* Basilisk II (C) 1997-1999 Christian Bauer |
| 5 |
* |
| 6 |
* Windows platform specific code copyright (C) Lauri Pesonen |
| 7 |
* |
| 8 |
* This program is free software; you can redistribute it and/or modify |
| 9 |
* it under the terms of the GNU General Public License as published by |
| 10 |
* the Free Software Foundation; either version 2 of the License, or |
| 11 |
* (at your option) any later version. |
| 12 |
* |
| 13 |
* This program is distributed in the hope that it will be useful, |
| 14 |
* but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 15 |
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 16 |
* GNU General Public License for more details. |
| 17 |
* |
| 18 |
* You should have received a copy of the GNU General Public License |
| 19 |
* along with this program; if not, write to the Free Software |
| 20 |
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
| 21 |
*/ |
| 22 |
|
| 23 |
#include "ntddk.h" |
| 24 |
#include "ndis.h" |
| 25 |
#include "b2ether.h" |
| 26 |
|
| 27 |
|
| 28 |
NTSTATUS PacketRead( IN PDEVICE_OBJECT DeviceObject, IN PIRP Irp ) |
| 29 |
{ |
| 30 |
POPEN_INSTANCE open; |
| 31 |
PNDIS_PACKET pPacket; |
| 32 |
NDIS_STATUS status; |
| 33 |
NTSTATUS ntStatus; |
| 34 |
PIO_STACK_LOCATION irpSp; |
| 35 |
|
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// DebugPrint(("Read\n")); |
| 37 |
|
| 38 |
open = DeviceObject->DeviceExtension; |
| 39 |
|
| 40 |
IoIncrement(open); |
| 41 |
|
| 42 |
if(!open->Bound) { |
| 43 |
ntStatus = STATUS_DEVICE_NOT_READY; |
| 44 |
goto ERROR; |
| 45 |
} |
| 46 |
|
| 47 |
irpSp = IoGetCurrentIrpStackLocation(Irp); |
| 48 |
|
| 49 |
if (irpSp->Parameters.Read.Length < ETHERNET_HEADER_LENGTH) { |
| 50 |
ntStatus = STATUS_BUFFER_TOO_SMALL; |
| 51 |
goto ERROR; |
| 52 |
} |
| 53 |
|
| 54 |
NdisAllocatePacket( &status, &pPacket, open->PacketPool ); |
| 55 |
if (status != NDIS_STATUS_SUCCESS) { |
| 56 |
// DebugPrint(("Packet: Read- No free packets\n")); |
| 57 |
ntStatus = STATUS_INSUFFICIENT_RESOURCES; |
| 58 |
goto ERROR; |
| 59 |
} |
| 60 |
|
| 61 |
RESERVED(pPacket)->Irp=Irp; |
| 62 |
RESERVED(pPacket)->pMdl=NULL; |
| 63 |
IoMarkIrpPending(Irp); |
| 64 |
|
| 65 |
IoSetCancelRoutine(Irp, PacketCancelRoutine); |
| 66 |
|
| 67 |
ExInterlockedInsertTailList( |
| 68 |
&open->RcvList, |
| 69 |
&RESERVED(pPacket)->ListElement, |
| 70 |
&open->RcvQSpinLock); |
| 71 |
|
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return STATUS_PENDING; |
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|
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ERROR: |
| 75 |
Irp->IoStatus.Status = ntStatus; |
| 76 |
IoCompleteRequest (Irp, IO_NO_INCREMENT); |
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IoDecrement(open); |
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return ntStatus; |
| 79 |
} |
| 80 |
|
| 81 |
|
| 82 |
|
| 83 |
NDIS_STATUS |
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PacketReceiveIndicate ( |
| 85 |
IN NDIS_HANDLE ProtocolBindingContext, |
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IN NDIS_HANDLE MacReceiveContext, |
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IN PVOID HeaderBuffer, |
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IN UINT HeaderBufferSize, |
| 89 |
IN PVOID LookAheadBuffer, |
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IN UINT LookaheadBufferSize, |
| 91 |
IN UINT PacketSize |
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) |
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{ |
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POPEN_INSTANCE open; |
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PIO_STACK_LOCATION irpSp; |
| 96 |
PIRP irp; |
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PLIST_ENTRY packetListEntry; |
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PNDIS_PACKET pPacket; |
| 99 |
ULONG sizeToTransfer; |
| 100 |
NDIS_STATUS status; |
| 101 |
UINT bytesTransfered = 0; |
| 102 |
ULONG bufferLength; |
| 103 |
PPACKET_RESERVED reserved; |
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PMDL pMdl; |
| 105 |
|
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// DebugPrint(("ReceiveIndicate\n")); |
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|
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open= (POPEN_INSTANCE)ProtocolBindingContext; |
| 109 |
|
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if (HeaderBufferSize > ETHERNET_HEADER_LENGTH) { |
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return NDIS_STATUS_SUCCESS; |
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} |
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|
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// See if there are any pending read that we can satisfy |
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packetListEntry = ExInterlockedRemoveHeadList( &open->RcvList, &open->RcvQSpinLock ); |
| 116 |
|
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if (packetListEntry == NULL) { |
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// DebugPrint(("No pending read, dropping packets\n")); |
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return NDIS_STATUS_NOT_ACCEPTED; |
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} |
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|
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reserved = CONTAINING_RECORD(packetListEntry,PACKET_RESERVED,ListElement); |
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pPacket = CONTAINING_RECORD(reserved,NDIS_PACKET,ProtocolReserved); |
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|
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irp = RESERVED(pPacket)->Irp; |
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irpSp = IoGetCurrentIrpStackLocation(irp); |
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|
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// We don't have to worry about the situation where the IRP is cancelled |
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// after we remove it from the queue and before we reset the cancel |
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// routine because the cancel routine has been coded to cancel an IRP |
| 131 |
// only if it's in the queue. |
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|
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IoSetCancelRoutine(irp, NULL); |
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|
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bufferLength = irpSp->Parameters.Read.Length-ETHERNET_HEADER_LENGTH; |
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|
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sizeToTransfer = (PacketSize < bufferLength) ? PacketSize : bufferLength; |
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|
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NdisMoveMappedMemory( |
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MmGetSystemAddressForMdlSafe(irp->MdlAddress, NormalPagePriority), |
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HeaderBuffer, |
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HeaderBufferSize |
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); |
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|
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pMdl=IoAllocateMdl( |
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MmGetMdlVirtualAddress(irp->MdlAddress), |
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MmGetMdlByteCount(irp->MdlAddress), |
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FALSE, |
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FALSE, |
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NULL |
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); |
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|
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if (pMdl == NULL) { |
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// DebugPrint(("Packet: Read-Failed to allocate Mdl\n")); |
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status = NDIS_STATUS_RESOURCES; |
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goto ERROR; |
| 157 |
} |
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|
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IoBuildPartialMdl( |
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irp->MdlAddress, |
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pMdl, |
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((PUCHAR)MmGetMdlVirtualAddress(irp->MdlAddress))+ETHERNET_HEADER_LENGTH, |
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0 |
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); |
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|
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pMdl->Next = NULL; |
| 167 |
|
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RESERVED(pPacket)->pMdl=pMdl; |
| 169 |
|
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NdisChainBufferAtFront(pPacket,pMdl); |
| 171 |
|
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NdisTransferData( |
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&status, |
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open->AdapterHandle, |
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MacReceiveContext, |
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0, |
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sizeToTransfer, |
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pPacket, |
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&bytesTransfered |
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); |
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|
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if (status == NDIS_STATUS_PENDING) { |
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return NDIS_STATUS_SUCCESS; |
| 184 |
} |
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|
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ERROR: |
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PacketTransferDataComplete( open, pPacket, status, bytesTransfered ); |
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return NDIS_STATUS_SUCCESS; |
| 189 |
} |
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|
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|
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VOID |
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PacketTransferDataComplete ( |
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IN NDIS_HANDLE ProtocolBindingContext, |
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IN PNDIS_PACKET pPacket, |
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IN NDIS_STATUS Status, |
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IN UINT BytesTransfered |
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) |
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{ |
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PIO_STACK_LOCATION irpSp; |
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POPEN_INSTANCE open; |
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PIRP irp; |
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PMDL pMdl; |
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|
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// DebugPrint(("Packet: TransferDataComplete\n")); |
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|
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open = (POPEN_INSTANCE)ProtocolBindingContext; |
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irp = RESERVED(pPacket)->Irp; |
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irpSp = IoGetCurrentIrpStackLocation(irp); |
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pMdl = RESERVED(pPacket)->pMdl; |
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|
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|
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if(pMdl) IoFreeMdl(pMdl); |
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|
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NdisFreePacket(pPacket); |
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|
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if(Status == NDIS_STATUS_SUCCESS) { |
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irp->IoStatus.Status = STATUS_SUCCESS; |
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irp->IoStatus.Information = BytesTransfered+ETHERNET_HEADER_LENGTH; |
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} else { |
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irp->IoStatus.Status = STATUS_UNSUCCESSFUL; |
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irp->IoStatus.Information = 0; |
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} |
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|
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// DebugPrint(("BytesTransfered:%d\n", irp->IoStatus.Information)); |
| 226 |
|
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IoCompleteRequest(irp, IO_NO_INCREMENT); |
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IoDecrement(open); |
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} |
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|
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VOID PacketReceiveComplete( IN NDIS_HANDLE ProtocolBindingContext ) |
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{ |
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} |
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|
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INT |
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PacketReceivePacket( |
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IN NDIS_HANDLE ProtocolBindingContext, |
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IN PNDIS_PACKET Packet |
| 239 |
) |
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{ |
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UINT bytesTransfered = 0; |
| 242 |
POPEN_INSTANCE open; |
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PIRP irp; |
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PNDIS_PACKET myPacket; |
| 245 |
PLIST_ENTRY packetListEntry; |
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ULONG bufferLength; |
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PPACKET_RESERVED reserved; |
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PIO_STACK_LOCATION irpSp; |
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PMDL mdl; |
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PVOID startAddress; |
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NTSTATUS status; |
| 252 |
|
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// DebugPrint(("PacketReceivePacket\n")); |
| 254 |
|
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open = (POPEN_INSTANCE)ProtocolBindingContext; |
| 256 |
|
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packetListEntry = ExInterlockedRemoveHeadList( |
| 258 |
&open->RcvList, |
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&open->RcvQSpinLock |
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); |
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|
| 262 |
if (packetListEntry == NULL) { |
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// DebugPrint(("No pending read, dropping packets\n")); |
| 264 |
return 0; |
| 265 |
} |
| 266 |
|
| 267 |
reserved = CONTAINING_RECORD(packetListEntry,PACKET_RESERVED,ListElement); |
| 268 |
myPacket = CONTAINING_RECORD(reserved,NDIS_PACKET,ProtocolReserved); |
| 269 |
|
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irp = RESERVED(myPacket)->Irp; |
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irpSp = IoGetCurrentIrpStackLocation(irp); |
| 272 |
|
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// We don't have to worry about the situation where the IRP is cancelled |
| 274 |
// after we remove it from the queue and before we reset the cancel |
| 275 |
// routine because the cancel routine has been coded to cancel an IRP |
| 276 |
// only if it's in the queue. |
| 277 |
|
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IoSetCancelRoutine(irp, NULL); |
| 279 |
|
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// Following block of code locks the destination packet |
| 281 |
// MDLs in a safe manner. This is a temporary workaround |
| 282 |
// for NdisCopyFromPacketToPacket that currently doesn't use |
| 283 |
// safe functions to lock pages of MDL. This is required to |
| 284 |
// prevent system from bugchecking under low memory resources. |
| 285 |
// |
| 286 |
{ |
| 287 |
PVOID virtualAddress; |
| 288 |
PNDIS_BUFFER firstBuffer, nextBuffer; |
| 289 |
ULONG totalLength; |
| 290 |
|
| 291 |
NdisQueryPacket(Packet, NULL, NULL, &firstBuffer, &totalLength); |
| 292 |
while( firstBuffer ) { |
| 293 |
NdisQueryBufferSafe( firstBuffer, &virtualAddress, &totalLength, NormalPagePriority ); |
| 294 |
if(!virtualAddress) { |
| 295 |
status = STATUS_INSUFFICIENT_RESOURCES; |
| 296 |
goto CleanExit; |
| 297 |
} |
| 298 |
NdisGetNextBuffer(firstBuffer, &nextBuffer); |
| 299 |
firstBuffer = nextBuffer; |
| 300 |
} |
| 301 |
} |
| 302 |
|
| 303 |
NdisChainBufferAtFront( myPacket, irp->MdlAddress ); |
| 304 |
bufferLength=irpSp->Parameters.Read.Length; |
| 305 |
NdisCopyFromPacketToPacket( myPacket, 0, bufferLength, Packet, 0, &bytesTransfered ); |
| 306 |
|
| 307 |
CleanExit: |
| 308 |
NdisFreePacket(myPacket); |
| 309 |
irp->IoStatus.Status = status; |
| 310 |
irp->IoStatus.Information = bytesTransfered; |
| 311 |
IoCompleteRequest(irp, IO_NO_INCREMENT); |
| 312 |
// DebugPrint(("BytesTransfered:%d\n", bytesTransfered)); |
| 313 |
IoDecrement(open); |
| 314 |
return 0; |
| 315 |
} |
| 316 |
|
| 317 |
|
| 318 |
VOID |
| 319 |
PacketCancelRoutine ( |
| 320 |
IN PDEVICE_OBJECT DeviceObject, |
| 321 |
IN PIRP Irp |
| 322 |
) |
| 323 |
|
| 324 |
{ |
| 325 |
POPEN_INSTANCE open = DeviceObject->DeviceExtension; |
| 326 |
KIRQL oldIrql; |
| 327 |
PIRP irpToComplete = NULL; |
| 328 |
PLIST_ENTRY thisEntry, listHead; |
| 329 |
PIRP pendingIrp; |
| 330 |
PNDIS_PACKET myPacket = NULL; |
| 331 |
PPACKET_RESERVED reserved; |
| 332 |
PMDL mdl; |
| 333 |
|
| 334 |
// Don't assume that the IRP being cancelled is in the queue. |
| 335 |
// Only complete the IRP if it IS in the queue. |
| 336 |
// |
| 337 |
// Must acquire the local spinlock before releasing |
| 338 |
// the global cancel spinlock |
| 339 |
// |
| 340 |
// DebugPrint(("PacketCancelRoutine\n")); |
| 341 |
|
| 342 |
oldIrql = Irp->CancelIrql; |
| 343 |
|
| 344 |
// One should not intermix KeAcquireSpinLock(AtDpcLevel) |
| 345 |
// and ExInterlocked...List() functions on the same spinlock if the |
| 346 |
// routines that use the lock run at IRQL > DISPATCH_LEVEL. |
| 347 |
// After acquiring the lock using Ke function, if we got interrupted |
| 348 |
// and entered into an ISR and tried to manipulate the list using |
| 349 |
// ExInterlocked...List function with the same lock, we deadlock. |
| 350 |
// In this sample we can safely do that because none of our routines |
| 351 |
// will be called at IRQL > DISPATCH_LEVEL. |
| 352 |
|
| 353 |
KeAcquireSpinLockAtDpcLevel(&open->RcvQSpinLock); |
| 354 |
IoReleaseCancelSpinLock( KeGetCurrentIrql() ); |
| 355 |
|
| 356 |
listHead = &open->RcvList; |
| 357 |
for( thisEntry = listHead->Flink; thisEntry != listHead; thisEntry = thisEntry->Flink ) { |
| 358 |
reserved=CONTAINING_RECORD(thisEntry,PACKET_RESERVED,ListElement); |
| 359 |
myPacket=CONTAINING_RECORD(reserved,NDIS_PACKET,ProtocolReserved); |
| 360 |
pendingIrp = RESERVED(myPacket)->Irp; |
| 361 |
if (pendingIrp == Irp) { |
| 362 |
RemoveEntryList(thisEntry); |
| 363 |
irpToComplete = pendingIrp; |
| 364 |
break; |
| 365 |
} |
| 366 |
} |
| 367 |
|
| 368 |
KeReleaseSpinLock(&open->RcvQSpinLock, oldIrql); |
| 369 |
|
| 370 |
if(irpToComplete) { |
| 371 |
// DebugPrint(("Cancelling IRP\n")); |
| 372 |
// ASSERT(myPacket); |
| 373 |
|
| 374 |
NdisFreePacket(myPacket); |
| 375 |
|
| 376 |
irpToComplete->IoStatus.Status = STATUS_CANCELLED; |
| 377 |
irpToComplete->IoStatus.Information = 0; |
| 378 |
IoCompleteRequest(irpToComplete, IO_NO_INCREMENT); |
| 379 |
IoDecrement(open); |
| 380 |
} |
| 381 |
} |
| 382 |
|
| 383 |
|
| 384 |
NTSTATUS PacketCancelReadIrps( IN PDEVICE_OBJECT DeviceObject ) |
| 385 |
{ |
| 386 |
POPEN_INSTANCE open = DeviceObject->DeviceExtension; |
| 387 |
PLIST_ENTRY thisEntry; |
| 388 |
PIRP pendingIrp; |
| 389 |
PNDIS_PACKET myPacket = NULL; |
| 390 |
PPACKET_RESERVED reserved; |
| 391 |
PMDL mdl; |
| 392 |
|
| 393 |
// DebugPrint(("PacketCancelReadIrps\n")); |
| 394 |
|
| 395 |
// Walk through the RcvList and cancel all read IRPs. |
| 396 |
|
| 397 |
while( thisEntry = ExInterlockedRemoveHeadList( &open->RcvList, &open->RcvQSpinLock )) { |
| 398 |
reserved=CONTAINING_RECORD(thisEntry,PACKET_RESERVED,ListElement); |
| 399 |
myPacket=CONTAINING_RECORD(reserved,NDIS_PACKET,ProtocolReserved); |
| 400 |
|
| 401 |
ASSERT(myPacket); |
| 402 |
|
| 403 |
pendingIrp = RESERVED(myPacket)->Irp; |
| 404 |
|
| 405 |
NdisFreePacket(myPacket); |
| 406 |
|
| 407 |
// DebugPrint(("Cancelled : 0%0x\n", pendingIrp)); |
| 408 |
|
| 409 |
IoSetCancelRoutine(pendingIrp, NULL); |
| 410 |
|
| 411 |
pendingIrp->IoStatus.Information = 0; |
| 412 |
pendingIrp->IoStatus.Status = STATUS_CANCELLED; |
| 413 |
IoCompleteRequest(pendingIrp, IO_NO_INCREMENT); |
| 414 |
IoDecrement(open); |
| 415 |
} |
| 416 |
|
| 417 |
return STATUS_SUCCESS; |
| 418 |
} |
