VOID
LpxFakeTransferDataComplete (
IN NDIS_HANDLE BindingContext,
IN PNDIS_PACKET NdisPacket,
IN NDIS_STATUS NdisStatus,
IN UINT BytesTransferred
)
{
ENTER_LPX;
LpxTransferDataComplete (BindingContext, NdisPacket, NdisStatus, BytesTransferred);
LEAVE_LPX;
}
NDIS_STATUS
LpxReceiveIndication (
IN NDIS_HANDLE ProtocolBindingContext,
IN NDIS_HANDLE MacReceiveContext,
IN PVOID HeaderBuffer,
IN UINT HeaderBufferSize,
IN PVOID LookAheadBuffer,
IN UINT LookAheadBufferSize,
IN UINT PacketSize
)
/*++
Routine Description:
This routine receives control from the physical provider as an
indication that a frame has been received on the physical link.
This routine is time critical, so we only allocate a
buffer and copy the packet into it. We also perform minimal
validation on this packet. It gets queued to the device context
to allow for processing later.
Arguments:
BindingContext - The Adapter Binding specified at initialization time.
ReceiveContext - A magic cookie for the MAC.
HeaderBuffer - pointer to a buffer containing the packet header.
HeaderBufferSize - the size of the header.
LookaheadBuffer - pointer to a buffer containing the negotiated minimum
amount of buffer I get to look at (not including header).
LookaheadBufferSize - the size of the above. May be less than asked
for, if that's all there is.
PacketSize - Overall size of the packet (not including header).
Return Value:
NDIS_STATUS - status of operation, one of:
NDIS_STATUS_SUCCESS if packet accepted,
NDIS_STATUS_NOT_RECOGNIZED if not recognized by protocol,
NDIS_any_other_thing if I understand, but can't handle.
--*/
{
PDEVICE_CONTEXT deviceContext;
USHORT protocol;
PNDIS_PACKET packet;
NDIS_STATUS status;
UINT bytesTransfered = 0;
UINT startOffset = 0;
DebugPrint( 4, ("LpxReceiveIndication, Entered\n") );
deviceContext = (PDEVICE_CONTEXT)ProtocolBindingContext;
//
// validation
//
if (HeaderBufferSize != ETHERNET_HEADER_LENGTH) {
DebugPrint( 4, ("HeaderBufferSize = %x\n", HeaderBufferSize) );
return NDIS_STATUS_NOT_RECOGNIZED;
}
RtlCopyMemory( (PUCHAR)&protocol, &((PUCHAR)HeaderBuffer)[12], sizeof(USHORT) );
//
// Discard 802.2 LLC SNAP field.
//
// if Ether Type less than 0x0600 ( 1536 )
//
if (NTOHS(protocol) < 0x0600 &&
protocol != HTONS(0x0060) && // LOOP: Ethernet Loopback
protocol != HTONS(0x0200) && // PUP : Xerox PUP packet
protocol != HTONS(0x0201)) { // PUPAP: Xerox PUP address trans packet
#if __LPX__
NdisCopyLookaheadData( (PUCHAR)&protocol,
&((PUCHAR)LookAheadBuffer)[LENGTH_8022LLCSNAP - 2],
sizeof(USHORT),
deviceContext->MacOptions );
#endif
PacketSize -= LENGTH_8022LLCSNAP;
LookAheadBufferSize -= LENGTH_8022LLCSNAP;
startOffset = LENGTH_8022LLCSNAP;
}
if (protocol != HTONS(ETH_P_LPX)) {
DebugPrint( 4, ("Type = %x\n", protocol) );
return NDIS_STATUS_NOT_RECOGNIZED;
}
//
// Check to see if the device context is initialized.
//
//ACQUIRE_DPC_SPIN_LOCK( &deviceContext->SpinLock );
if (!FlagOn(deviceContext->LpxFlags, LPX_DEVICE_CONTEXT_START) || FlagOn(deviceContext->LpxFlags, LPX_DEVICE_CONTEXT_STOP)) {
//RELEASE_DPC_SPIN_LOCK( &deviceContext->SpinLock );
DebugPrint( 4,("Device is not initialized. Drop packet\n") );
return NDIS_STATUS_NOT_RECOGNIZED;
}
ASSERT( deviceContext->NdisBindingHandle );
//RELEASE_DPC_SPIN_LOCK( &deviceContext->SpinLock );
//
// DROP PACKET for DEBUGGING!!!!
//
#if 1 //DBG // Enabled for testing
if (PacketRxDropRate) {
PacketRxCountForDrop++;
if ((PacketRxCountForDrop % 1000) <= PacketRxDropRate) {
PLPX_HEADER lpxHeader = (PLPX_HEADER)LookAheadBuffer;
#if 0
if ((PacketRxCountForDrop % (PacketRxDropRate*20)) == 0)
DebugPrint( 1, ("[Drop(%x,%x,%x))]\n",
NTOHS(lpxHeader->Lsctl), NTOHS(lpxHeader->Sequence), NTOHS(lpxHeader->AckSequence)) );
#endif
DebugPrint( 1, ("D") );
return NDIS_STATUS_NOT_RECOGNIZED;
}
}
#endif
ASSERT( startOffset == 0 );
DebugPrint( 4, ("LpxReceiveIndication, PacketSize = %d, LookAheadBufferSize = %d, LPX_HEADER size = %d\n",
PacketSize, LookAheadBufferSize, sizeof(LPX_HEADER)) );
if (LookAheadBufferSize >= sizeof(LPX_HEADER)) {
PNDIS_BUFFER firstBuffer;
PUCHAR packetData;
PLPX_HEADER lpxHeader;
USHORT lpxHeaderSize;
lpxHeader = (PLPX_HEADER)((PBYTE)LookAheadBuffer + startOffset);
lpxHeaderSize = sizeof(LPX_HEADER);
#if __LPX_OPTION_ADDRESSS__
if (FlagOn(lpxHeader->Option, LPX_OPTION_SOURCE_ADDRESS)) {
lpxHeaderSize += ETHERNET_ADDRESS_LENGTH;
}
if (FlagOn(lpxHeader->Option, LPX_OPTION_DESTINATION_ADDRESS)) {
lpxHeaderSize += ETHERNET_ADDRESS_LENGTH;
}
#endif
if (NTOHS(lpxHeader->PacketSize & ~LPX_TYPE_MASK) == lpxHeaderSize) {
status = RcvPacketAlloc( deviceContext,
0,
&packet );
if (status == STATUS_SUCCESS) {
NdisCopyLookaheadData( &RESERVED(packet)->EthernetHeader,
HeaderBuffer,
ETHERNET_HEADER_LENGTH,
deviceContext->MacOptions );
RESERVED(packet)->EthernetHeader.Type = protocol;
RESERVED(packet)->RecvTime = CurrentTime();
RtlCopyMemory( &RESERVED(packet)->LpxHeader, lpxHeader, lpxHeaderSize );
RESERVED(packet)->HeaderCopied = TRUE;
RESERVED(packet)->PacketRawDataLength = 0;
RESERVED(packet)->PacketRawDataOffset = 0;
LpxTransferDataComplete( deviceContext,
packet,
NDIS_STATUS_SUCCESS,
LookAheadBufferSize );
return NDIS_STATUS_SUCCESS;
}
} else if (LookAheadBufferSize >= NTOHS(lpxHeader->PacketSize & ~LPX_TYPE_MASK)) {
status = RcvPacketAlloc( deviceContext,
NTOHS(lpxHeader->PacketSize & ~LPX_TYPE_MASK) - lpxHeaderSize,
&packet );
if (status == STATUS_SUCCESS) {
NdisCopyLookaheadData( &RESERVED(packet)->EthernetHeader,
HeaderBuffer,
ETHERNET_HEADER_LENGTH,
deviceContext->MacOptions );
RESERVED(packet)->EthernetHeader.Type = protocol;
RESERVED(packet)->RecvTime = CurrentTime();
RtlCopyMemory( &RESERVED(packet)->LpxHeader, lpxHeader, lpxHeaderSize );
RESERVED(packet)->HeaderCopied = TRUE;
RESERVED(packet)->PacketRawDataLength = NTOHS(lpxHeader->PacketSize & ~LPX_TYPE_MASK) - lpxHeaderSize;
RESERVED(packet)->PacketRawDataOffset = 0;
NdisQueryPacket( packet, NULL, NULL, &firstBuffer, NULL );
packetData = MmGetMdlVirtualAddress( firstBuffer );
NdisCopyLookaheadData( packetData,
(PBYTE)LookAheadBuffer + startOffset + lpxHeaderSize,
RESERVED(packet)->PacketRawDataLength,
deviceContext->MacOptions );
LpxTransferDataComplete( deviceContext,
packet,
NDIS_STATUS_SUCCESS,
LookAheadBufferSize );
return NDIS_STATUS_SUCCESS;
}
} else {
status = RcvPacketAlloc( deviceContext,
startOffset + NTOHS(lpxHeader->PacketSize & ~LPX_TYPE_MASK),
&packet );
if (status == STATUS_SUCCESS) {
NdisCopyLookaheadData( &RESERVED(packet)->EthernetHeader,
HeaderBuffer,
ETHERNET_HEADER_LENGTH,
deviceContext->MacOptions );
RESERVED(packet)->EthernetHeader.Type = protocol;
RESERVED(packet)->RecvTime = CurrentTime();
RtlCopyMemory( &RESERVED(packet)->LpxHeader, lpxHeader, lpxHeaderSize );
RESERVED(packet)->HeaderCopied = TRUE;
RESERVED(packet)->PacketRawDataLength = startOffset + NTOHS(lpxHeader->PacketSize & ~LPX_TYPE_MASK);
RESERVED(packet)->PacketRawDataOffset = startOffset + lpxHeaderSize;
}
}
} else {
PLPX_HEADER lpxHeader;
PNDIS_BUFFER firstBuffer;
PUCHAR packetData;
UINT packetDataLength;
ASSERT( FALSE );
status = RcvPacketAlloc( deviceContext, PacketSize, &packet );
if (status == STATUS_SUCCESS) {
RtlCopyMemory( &RESERVED(packet)->EthernetHeader,
HeaderBuffer,
ETHERNET_HEADER_LENGTH );
RESERVED(packet)->EthernetHeader.Type = protocol;
RESERVED(packet)->RecvTime = CurrentTime();
RESERVED(packet)->PacketRawDataLength = PacketSize;
RESERVED(packet)->PacketRawDataOffset = startOffset;
NdisQueryPacket( packet, NULL, NULL, &firstBuffer, NULL );
NdisQueryBufferSafe( firstBuffer, &packetData, &packetDataLength, HighPagePriority );
lpxHeader = (PLPX_HEADER)(packetData + RESERVED(packet)->PacketRawDataOffset);
RtlZeroMemory( lpxHeader, sizeof(LPX_HEADER) );
RESERVED(packet)->HeaderCopied = FALSE;
}
}
if (status != NDIS_STATUS_SUCCESS) {
return NDIS_STATUS_NOT_RECOGNIZED;
}
ASSERT( packet->Private.NdisPacketFlags & fPACKET_ALLOCATED_BY_NDIS );
if (deviceContext->NdisBindingHandle) {
//ASSERT( FALSE );
NdisTransferData( &status,
deviceContext->NdisBindingHandle,
MacReceiveContext,
0, //RESERVED(packet)->PacketRawDataOffset,
RESERVED(packet)->PacketRawDataLength,
packet,
&bytesTransfered );
if (status == NDIS_STATUS_PENDING) {
LPX_ASSERT( FALSE );
status = NDIS_STATUS_SUCCESS;
} else if (status == NDIS_STATUS_SUCCESS) {
LpxTransferDataComplete( deviceContext,
packet,
status,
bytesTransfered );
} else {
LPX_ASSERT( FALSE );
DebugPrint( 1, ("NdisTransferData() failed. STATUS=%08lx\n", status) );
}
} else {
status = NDIS_STATUS_NOT_RECOGNIZED;
DebugPrint( 1, ("Invalid device status. STATUS=%08lx\n", status) );
}
return status;
}
