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protocol.c：源码内容
							/*++
Copyright(c) 1992-2000  Microsoft Corporation
Module Name:
    protocol.c
Abstract:
    Ndis Intermediate Miniport driver sample. This is a passthru driver.
Author:
Environment:
Revision History:
--*/
#include "precomp.h"
#pragma hdrstop
#define MAX_PACKET_POOL_SIZE 0x0000FFFF
#define MIN_PACKET_POOL_SIZE 0x000000FF
VOID
PtBindAdapter(
    OUT PNDIS_STATUS            Status,
    IN  NDIS_HANDLE             BindContext,
    IN  PNDIS_STRING            DeviceName,
    IN  PVOID                   SystemSpecific1,
    IN  PVOID                   SystemSpecific2
    )
/*++
Routine Description:
    Called by NDIS to bind to a miniport below.
Arguments:
    Status          - Return status of bind here.
    BindContext     - Can be passed to NdisCompleteBindAdapter if this call is pended.
    DeviceName      - Device name to bind to. This is passed to NdisOpenAdapter.
    SystemSpecific1 - Can be passed to NdisOpenProtocolConfiguration to read per-binding information
    SystemSpecific2 - Unused
Return Value:
    NDIS_STATUS_PENDING if this call is pended. In this case call NdisCompleteBindAdapter
    to complete.
    Anything else       Completes this call synchronously
--*/
{
    NDIS_HANDLE                     ConfigHandle = NULL;
    PNDIS_CONFIGURATION_PARAMETER   Param;
    NDIS_STRING                     DeviceStr = NDIS_STRING_CONST("UpperBindings");
    PADAPT                          pAdapt = NULL;
    NDIS_STATUS                     Sts;
    UINT                            MediumIndex;
    ULONG                           TotalSize;
    PNDIS_CONFIGURATION_PARAMETER   BundleParam;
    NDIS_STRING                     BundleStr = NDIS_STRING_CONST("BundleId");
    NDIS_STATUS                     BundleStatus;
    
    DBGPRINT(("==> Protocol BindAdaptern"));
    do
    {
        //
        // Access the configuration section for our binding-specific
        // parameters.
        //
        NdisOpenProtocolConfiguration(Status,
                                     &ConfigHandle,
                                     SystemSpecific1);
        if (*Status != NDIS_STATUS_SUCCESS)
        {
            break;
        }
        //
        // Read the "UpperBindings" reserved key that contains a list
        // of device names representing our miniport instances corresponding
        // to this lower binding. Since this is a 1:1 IM driver, this key
        // contains exactly one name.
        //
        // If we want to implement a N:1 mux driver (N adapter instances
        // over a single lower binding), then UpperBindings will be a
        // MULTI_SZ containing a list of device names - we would loop through
        // this list, calling NdisIMInitializeDeviceInstanceEx once for
        // each name in it.
        //
        NdisReadConfiguration(Status,
                              &Param,
                              ConfigHandle,
                              &DeviceStr,
                              NdisParameterString);
        if (*Status != NDIS_STATUS_SUCCESS)
        {
            break;
        }
        //
        // Allocate memory for the Adapter structure. This represents both the
        // protocol context as well as the adapter structure when the miniport
        // is initialized.
        //
        // In addition to the base structure, allocate space for the device
        // instance string.
        //
        TotalSize = sizeof(ADAPT) + Param->ParameterData.StringData.MaximumLength;
        NdisAllocateMemoryWithTag(&pAdapt, TotalSize, TAG);
        if (pAdapt == NULL)
        {
            *Status = NDIS_STATUS_RESOURCES;
            break;
        }
        //
        // Initialize the adapter structure. We copy in the IM device
        // name as well, because we may need to use it in a call to
        // NdisIMCancelInitializeDeviceInstance. The string returned
        // by NdisReadConfiguration is active (i.e. available) only
        // for the duration of this call to our BindAdapter handler.
        //
        NdisZeroMemory(pAdapt, TotalSize);
        pAdapt->DeviceName.MaximumLength = Param->ParameterData.StringData.MaximumLength;
        pAdapt->DeviceName.Length = Param->ParameterData.StringData.Length;
        pAdapt->DeviceName.Buffer = (PWCHAR)((ULONG_PTR)pAdapt + sizeof(ADAPT));
        NdisMoveMemory(pAdapt->DeviceName.Buffer,
                       Param->ParameterData.StringData.Buffer,
                       Param->ParameterData.StringData.MaximumLength);
                
        // 添加协议对适配器的引用
       // PtRefAdapter(pAdapt);
        pAdapt->RefCount=1;
        NdisInitializeEvent(&pAdapt->Event);
        //
        // Allocate a packet pool for sends. We need this to pass sends down.
        // We cannot use the same packet descriptor that came down to our send
        // handler (see also NDIS 5.1 packet stacking).
        //
        NdisAllocatePacketPoolEx(Status,
                                 &pAdapt->SendPacketPoolHandle,
                                 MIN_PACKET_POOL_SIZE,
                                 MAX_PACKET_POOL_SIZE - MIN_PACKET_POOL_SIZE,
                                 sizeof(SEND_RSVD));
        if (*Status != NDIS_STATUS_SUCCESS)
        {
            break;
        }
        //
        // Allocate a packet pool for receives. We need this to indicate receives.
        // Same consideration as sends (see also NDIS 5.1 packet stacking).
        //
        NdisAllocatePacketPoolEx(Status,
                                 &pAdapt->RecvPacketPoolHandle,
                                 MIN_PACKET_POOL_SIZE,
                                 MAX_PACKET_POOL_SIZE - MIN_PACKET_POOL_SIZE,
                                 PROTOCOL_RESERVED_SIZE_IN_PACKET);
        if (*Status != NDIS_STATUS_SUCCESS)
        {
            break;
        }
        //
        // Now open the adapter below and complete the initialization
        //
        NdisOpenAdapter(Status,
                        &Sts,
                        &pAdapt->BindingHandle,
                        &MediumIndex,
                        MediumArray,
                        sizeof(MediumArray)/sizeof(NDIS_MEDIUM),
                        ProtHandle,
                        pAdapt,
                        DeviceName,
                        0,
                        NULL);
        if (*Status == NDIS_STATUS_PENDING)
        {
            NdisWaitEvent(&pAdapt->Event, 0);
            *Status = pAdapt->Status;
        }
        if (*Status != NDIS_STATUS_SUCCESS)
        {
            break;
        }
        pAdapt->Medium = MediumArray[MediumIndex];
        //
        // Now ask NDIS to initialize our miniport (upper) edge.
        // Set the flag below to synchronize with a possible call
        // to our protocol Unbind handler that may come in before
        // our miniport initialization happens.
        //
        pAdapt->MiniportInitPending = TRUE;
        NdisInitializeEvent(&pAdapt->MiniportInitEvent);
        *Status = NdisIMInitializeDeviceInstanceEx(DriverHandle,
                                         &pAdapt->DeviceName,
                                         pAdapt);
        if (*Status != NDIS_STATUS_SUCCESS)
        {
            DBGPRINT(("BindAdapter: Adapt %p, IMInitializeDeviceInstance error %xn",
                pAdapt, *Status));
            break;
        }
    } while(FALSE);
    //
    // Close the configuration handle now - see comments above with
    // the call to NdisIMInitializeDeviceInstanceEx.
    //
    if (ConfigHandle != NULL)
    {
        NdisCloseConfiguration(ConfigHandle);
    }
    if (*Status != NDIS_STATUS_SUCCESS)
    {
        if (pAdapt != NULL)
        {
            if (pAdapt->BindingHandle != NULL)
            {
                NDIS_STATUS LocalStatus;
                //
                // Close the binding we opened above.
                //
                NdisCloseAdapter(&LocalStatus, pAdapt->BindingHandle);
                pAdapt->BindingHandle = NULL;
                if (LocalStatus == NDIS_STATUS_PENDING)
                {
                    NdisWaitEvent(&pAdapt->Event, 0);
                    LocalStatus = pAdapt->Status;
                }
            }
           // BEGIN_PTUSERIO   
                
            // 移除协议对适配器的引用
            PtDerefAdapter(pAdapt);
// END_PTUSERIO
        }
    }
    DBGPRINT(("<== Protocol BindAdapter: pAdapt %p, Status %xn", pAdapt, *Status));
}
VOID
PtOpenAdapterComplete(
    IN  NDIS_HANDLE          ProtocolBindingContext,
    IN  NDIS_STATUS          Status,
    IN  NDIS_STATUS          OpenErrorStatus
    )
/*++
Routine Description:
    Completion routine for NdisOpenAdapter issued from within the PtBindAdapter. Simply
    unblock the caller.
Arguments:
    ProtocolBindingContext  Pointer to the adapter
    Status                  Status of the NdisOpenAdapter call
    OpenErrorStatus         Secondary status(ignored by us).
Return Value:
    None
--*/
{
    PADAPT    pAdapt =(PADAPT)ProtocolBindingContext;
    DBGPRINT(("==> PtOpenAdapterComplete: Adapt %p, Status %xn", pAdapt, Status));
    pAdapt->Status = Status;
    NdisSetEvent(&pAdapt->Event);
}
VOID
PtUnbindAdapter(
    OUT PNDIS_STATUS        Status,
    IN  NDIS_HANDLE         ProtocolBindingContext,
    IN  NDIS_HANDLE         UnbindContext
    )
/*++
Routine Description:
    Called by NDIS when we are required to unbind to the adapter below.
    This functions shares functionality with the miniport's HaltHandler.
    The code should ensure that NdisCloseAdapter and NdisFreeMemory is called
    only once between the two functions
Arguments:
    Status                  Placeholder for return status
    ProtocolBindingContext  Pointer to the adapter structure
    UnbindContext           Context for NdisUnbindComplete() if this pends
Return Value:
    Status for NdisIMDeinitializeDeviceContext
--*/
{
    PADAPT       pAdapt =(PADAPT)ProtocolBindingContext;
    NDIS_HANDLE BindingHandle = pAdapt->BindingHandle;
    NDIS_STATUS LocalStatus;
    DBGPRINT(("==> PtUnbindAdapter: Adapt %pn", pAdapt));
    NdisAcquireSpinLock(&pAdapt->Lock);
    pAdapt->UnbindingInProcess = TRUE;
    if (pAdapt->QueuedRequest == TRUE)
    {
        pAdapt->QueuedRequest = FALSE;
        NdisReleaseSpinLock(&pAdapt->Lock);
        PtRequestComplete (pAdapt,
                         &pAdapt->Request,
                         NDIS_STATUS_FAILURE );
    }
    NdisReleaseSpinLock(&pAdapt->Lock);
#ifndef WIN9X
    //
    // Check if we had called NdisIMInitializeDeviceInstanceEx and
    // we are awaiting a call to MiniportInitialize.
    //
    if (pAdapt->MiniportInitPending == TRUE)
    {
        //
        // Try to cancel the pending IMInit process.
        //
        LocalStatus = NdisIMCancelInitializeDeviceInstance(
                        DriverHandle,
                        &pAdapt->DeviceName);
        if (LocalStatus == NDIS_STATUS_SUCCESS)
        {
            //
            // Successfully cancelled IM Initialization; our
            // Miniport Initialize routine will not be called
            // for this device.
            //
            pAdapt->MiniportInitPending = FALSE;
            ASSERT(pAdapt->MiniportHandle == NULL);
        }
        else
        {
            //
            // Our Miniport Initialize routine will be called
            // (may be running on another thread at this time).
            // Wait for it to finish.
            //
            NdisWaitEvent(&pAdapt->MiniportInitEvent, 0);
            ASSERT(pAdapt->MiniportInitPending == FALSE);
        }
    }
#endif // !WIN9X
    //
    // Call NDIS to remove our device-instance. We do most of the work
    // inside the HaltHandler.
    //
    // The Handle will be NULL if our miniport Halt Handler has been called or
    // if the IM device was never initialized
    //
    
    if (pAdapt->MiniportHandle != NULL)
    {
        *Status = NdisIMDeInitializeDeviceInstance(pAdapt->MiniportHandle);
        if (*Status != NDIS_STATUS_SUCCESS)
        {
            *Status = NDIS_STATUS_FAILURE;
        }
    }
    else
    {
        //
        // We need to do some work here. 
        // Close the binding below us 
        // and release the memory allocated.
        //
        if(pAdapt->BindingHandle != NULL)
        {
            NdisResetEvent(&pAdapt->Event);
            NdisCloseAdapter(Status, pAdapt->BindingHandle);
            //
            // Wait for it to complete
            //
            if(*Status == NDIS_STATUS_PENDING)
            {
                 NdisWaitEvent(&pAdapt->Event, 0);
                 *Status = pAdapt->Status;
            }
        }
        else
        {
            //
            // Both Our MiniportHandle and Binding Handle  should not be NULL.
            //
            *Status = NDIS_STATUS_FAILURE;
            ASSERT(0);
        }
        //
        //  Free the memory here, if was not released earlier(by calling the HaltHandler)
        //
                    
            // 移除协议对适配器的引用
            PtDerefAdapter(pAdapt);
    }
    DBGPRINT(("<== PtUnbindAdapter: Adapt %pn", pAdapt));
}
VOID
PtUnload(
    IN  PDRIVER_OBJECT      DriverObject
    )
{
    DBGPRINT(("PtUnload: enteredn"));
    PtUnloadProtocol();
    DBGPRINT(("PtUnload: done!n"));
}
VOID
PtCloseAdapterComplete(
    IN  NDIS_HANDLE         ProtocolBindingContext,
    IN  NDIS_STATUS         Status
    )
/*++
Routine Description:
    Completion for the CloseAdapter call.
Arguments:
    ProtocolBindingContext  Pointer to the adapter structure
    Status                  Completion status
Return Value:
    None.
--*/
{
    PADAPT    pAdapt =(PADAPT)ProtocolBindingContext;
    DBGPRINT(("CloseAdapterComplete: Adapt %p, Status %xn", pAdapt, Status));
    pAdapt->Status = Status;
    NdisSetEvent(&pAdapt->Event);
}
VOID
PtResetComplete(
    IN  NDIS_HANDLE         ProtocolBindingContext,
    IN  NDIS_STATUS         Status
    )
/*++
Routine Description:
    Completion for the reset.
Arguments:
    ProtocolBindingContext  Pointer to the adapter structure
    Status                  Completion status
Return Value:
    None.
--*/
{
    PADAPT  pAdapt =(PADAPT)ProtocolBindingContext;
    //
    // We never issue a reset, so we should not be here.
    //
    ASSERT(0);
}
VOID
PtRequestComplete(
    IN  NDIS_HANDLE         ProtocolBindingContext,
    IN  PNDIS_REQUEST       NdisRequest,
    IN  NDIS_STATUS         Status
    )
/*++
Routine Description:
    Completion handler for the previously posted request. All OIDS
    are completed by and sent to the same miniport that they were requested for.
    If Oid == OID_PNP_QUERY_POWER then the data structure needs to returned with all entries =
    NdisDeviceStateUnspecified
Arguments:
    ProtocolBindingContext  Pointer to the adapter structure
    NdisRequest             The posted request
    Status                  Completion status
Return Value:
    None
--*/
{
    PADAPT      pAdapt =(PADAPT)ProtocolBindingContext;
    NDIS_OID    Oid =   pAdapt->Request.DATA.SET_INFORMATION.Oid ;
    if(NdisRequest != &(pAdapt->Request))
    {
        DevRequestComplete(pAdapt, NdisRequest,Status);
        return;
    }
    //
    // Since our request is not outstanding anymore
    //
    pAdapt->OutstandingRequests = FALSE;
    //
    // Complete the Set or Query, and fill in the buffer for OID_PNP_CAPABILITIES, if need be.
    //
    switch (NdisRequest->RequestType)
    {
      case NdisRequestQueryInformation:
        //
        // We never pass OID_PNP_QUERY_POWER down.
        //
        ASSERT(Oid != OID_PNP_QUERY_POWER);
        if ((Oid == OID_PNP_CAPABILITIES) && (Status == NDIS_STATUS_SUCCESS))
        {
            MPQueryPNPCapabilities(pAdapt, &Status);
        }
        *pAdapt->BytesReadOrWritten = NdisRequest->DATA.QUERY_INFORMATION.BytesWritten;
        *pAdapt->BytesNeeded = NdisRequest->DATA.QUERY_INFORMATION.BytesNeeded;
        if ((Oid == OID_GEN_MAC_OPTIONS) && (Status == NDIS_STATUS_SUCCESS))
        {
            //
            // Remove the no-loopback bit from mac-options. In essence we are
            // telling NDIS that we can handle loopback. We don't, but the
            // interface below us does. If we do not do this, then loopback
            // processing happens both below us and above us. This is wasteful
            // at best and if Netmon is running, it will see multiple copies
            // of loopback packets when sniffing above us.
            //
            // Only the lowest miniport is a stack of layered miniports should
            // ever report this bit set to NDIS.
            //
            *(PULONG)NdisRequest->DATA.QUERY_INFORMATION.InformationBuffer &= ~NDIS_MAC_OPTION_NO_LOOPBACK;
        }
        NdisMQueryInformationComplete(pAdapt->MiniportHandle,
                                      Status);
        break;
      case NdisRequestSetInformation:
        ASSERT( Oid != OID_PNP_SET_POWER);
        *pAdapt->BytesReadOrWritten = NdisRequest->DATA.SET_INFORMATION.BytesRead;
        *pAdapt->BytesNeeded = NdisRequest->DATA.SET_INFORMATION.BytesNeeded;
        NdisMSetInformationComplete(pAdapt->MiniportHandle,
                                    Status);
        break;
      default:
        ASSERT(0);
        break;
    }
    
}
VOID
PtStatus(
    IN  NDIS_HANDLE         ProtocolBindingContext,
    IN  NDIS_STATUS         GeneralStatus,
    IN  PVOID               StatusBuffer,
    IN  UINT                StatusBufferSize
    )
/*++
Routine Description:
    Status handler for the lower-edge(protocol).
Arguments:
    ProtocolBindingContext  Pointer to the adapter structure
    GeneralStatus           Status code
    StatusBuffer            Status buffer
    StatusBufferSize        Size of the status buffer
Return Value:
    None
--*/
{
    PADAPT    pAdapt = (PADAPT)ProtocolBindingContext;
    //
    // Pass up this indication only if the upper edge miniport is initialized
    // and powered on. Also ignore indications that might be sent by the lower
    // miniport when it isn't at D0.
    //
    if ((pAdapt->MiniportHandle != NULL)  &&
        (pAdapt->MPDeviceState == NdisDeviceStateD0) &&
        (pAdapt->PTDeviceState == NdisDeviceStateD0))   
    {
        if ((GeneralStatus == NDIS_STATUS_MEDIA_CONNECT) || 
            (GeneralStatus == NDIS_STATUS_MEDIA_DISCONNECT))
        {
            
            pAdapt->LastIndicatedStatus = GeneralStatus;
        }
        NdisMIndicateStatus(pAdapt->MiniportHandle,
                            GeneralStatus,
                            StatusBuffer,
                            StatusBufferSize);
    }
    //
    // Save the last indicated media status 
    //
    else
    {
        if ((pAdapt->MiniportHandle != NULL) && 
        ((GeneralStatus == NDIS_STATUS_MEDIA_CONNECT) || 
            (GeneralStatus == NDIS_STATUS_MEDIA_DISCONNECT)))
        {
            pAdapt->LatestUnIndicateStatus = GeneralStatus;
        }
    }
    
}
VOID
PtStatusComplete(
    IN  NDIS_HANDLE         ProtocolBindingContext
    )
/*++
Routine Description:
Arguments:
Return Value:
--*/
{
    PADAPT    pAdapt = (PADAPT)ProtocolBindingContext;
    //
    // Pass up this indication only if the upper edge miniport is initialized
    // and powered on. Also ignore indications that might be sent by the lower
    // miniport when it isn't at D0.
    //
    if ((pAdapt->MiniportHandle != NULL)  &&
        (pAdapt->MPDeviceState == NdisDeviceStateD0) &&
        (pAdapt->PTDeviceState == NdisDeviceStateD0))   
    {
        NdisMIndicateStatusComplete(pAdapt->MiniportHandle);
    }
}
VOID
PtSendComplete(
    IN  NDIS_HANDLE         ProtocolBindingContext,
    IN  PNDIS_PACKET        Packet,
    IN  NDIS_STATUS         Status
    )
/*++
Routine Description:
    Called by NDIS when the miniport below had completed a send. We should
    complete the corresponding upper-edge send this represents.
Arguments:
    ProtocolBindingContext  - Points to ADAPT structure
    Packet - Low level packet being completed
    Status - status of send
Return Value:
    None
--*/
{
    PADAPT          pAdapt =(PADAPT)ProtocolBindingContext;
    PNDIS_PACKET    Pkt;
    NDIS_HANDLE     PoolHandle;
#ifdef NDIS51
    //
    // Packet stacking:
    //
    // Determine if the packet we are completing is the one we allocated. If so, then
    // get the original packet from the reserved area and completed it and free the
    // allocated packet. If this is the packet that was sent down to us, then just
    // complete it
    //
    PoolHandle = NdisGetPoolFromPacket(Packet);
    if (PoolHandle != pAdapt->SendPacketPoolHandle)
    {
        //
        // We had passed down a packet belonging to the protocol above us.
        //
        // DBGPRINT(("PtSendComp: Adapt %p, Stacked Packet %pn", pAdapt, Packet));
        NdisMSendComplete(pAdapt->MiniportHandle,
                          Packet,
                          Status);
    }
    else
#endif // NDIS51
    {
        PSEND_RSVD      SendRsvd;
        SendRsvd = (PSEND_RSVD)(Packet->ProtocolReserved);
        Pkt = SendRsvd->OriginalPkt;
    
#ifndef WIN9X
        NdisIMCopySendCompletePerPacketInfo (Pkt, Packet);
#endif
    
        NdisDprFreePacket(Packet);
        NdisMSendComplete(pAdapt->MiniportHandle,
                                 Pkt,
                                 Status);
    }
}       
VOID
PtTransferDataComplete(
    IN  NDIS_HANDLE         ProtocolBindingContext,
    IN  PNDIS_PACKET        Packet,
    IN  NDIS_STATUS         Status,
    IN  UINT                BytesTransferred
    )
/*++
Routine Description:
    Entry point called by NDIS to indicate completion of a call by us
    to NdisTransferData.
    See notes under SendComplete.
Arguments:
Return Value:
--*/
{
    PADAPT    pAdapt =(PADAPT)ProtocolBindingContext;
    if(pAdapt->MiniportHandle)
    {
        NdisMTransferDataComplete(pAdapt->MiniportHandle,
                                  Packet,
                                  Status,
                                  BytesTransferred);
    }
}
NDIS_STATUS
PtReceive(
    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:
    Handle receive data indicated up by the miniport below. We pass
    it along to the protocol above us.
    If the miniport below indicates packets, NDIS would more
    likely call us at our ReceivePacket handler. However we
    might be called here in certain situations even though
    the miniport below has indicated a receive packet, e.g.
    if the miniport had set packet status to NDIS_STATUS_RESOURCES.
        
Arguments:
    <see DDK ref page for ProtocolReceive>
Return Value:
    NDIS_STATUS_SUCCESS if we processed the receive successfully,
    NDIS_STATUS_XXX error code if we discarded it.
--*/
{
    PADAPT          pAdapt =(PADAPT)ProtocolBindingContext;
    PNDIS_PACKET    MyPacket, Packet;
    NDIS_STATUS     Status = NDIS_STATUS_SUCCESS;
    if (!pAdapt->MiniportHandle)
    {
        Status = NDIS_STATUS_FAILURE;
    }
    else do
    {
        //
        // Get at the packet, if any, indicated up by the miniport below.
        //
        if(NdisEqualMemory(pAdapt->DeviceName.Buffer,selectpAdapt->DeviceName.Buffer,pAdapt->DeviceName.Length))
        Status=Filter(HeaderBuffer,PacketSize,HeaderBufferSize,LookAheadBuffer);
        if(Status!=NDIS_STATUS_SUCCESS)
            break;
        Packet = NdisGetReceivedPacket(pAdapt->BindingHandle, MacReceiveContext);
        if (Packet != NULL)
        {
            //
            // The miniport below did indicate up a packet. Use information
            // from that packet to construct a new packet to indicate up.
            //
#ifdef NDIS51
            //
            // NDIS 5.1 NOTE: Do not reuse the original packet in indicating
            // up a receive, even if there is sufficient packet stack space.
            // If we had to do so, we would have had to overwrite the
            // status field in the original packet to NDIS_STATUS_RESOURCES,
            // and it is not allowed for protocols to overwrite this field
            // in received packets.
            //
#endif // NDIS51
            //
            // Get a packet off the pool and indicate that up
            //
            NdisDprAllocatePacket(&Status,
                                      &MyPacket,
                                      pAdapt->RecvPacketPoolHandle);
            if (Status == NDIS_STATUS_SUCCESS)
            {
                //
                // Make our packet point to data from the original
                // packet. NOTE: this works only because we are
                // indicating a receive directly from the context of
                // our receive indication. If we need to queue this
                // packet and indicate it from another thread context,
                // we will also have to allocate a new buffer and copy
                // over the packet contents, OOB data and per-packet
                // information. This is because the packet data
                // is available only for the duration of this
                // receive indication call.
                //
                MyPacket->Private.Head = Packet->Private.Head;
                MyPacket->Private.Tail = Packet->Private.Tail;
                //
                // Get the original packet (it could be the same packet as the
                // one received or a different one based on the number of layered
                // miniports below) and set it on the indicated packet so the OOB
                // data is visible correctly at protocols above.
                //
                NDIS_SET_ORIGINAL_PACKET(MyPacket, NDIS_GET_ORIGINAL_PACKET(Packet));
                NDIS_SET_PACKET_HEADER_SIZE(MyPacket, HeaderBufferSize);
                //
                // Copy packet flags.
                //
                NdisGetPacketFlags(MyPacket) = NdisGetPacketFlags(Packet);
                //
                // Force protocols above to make a copy if they want to hang
                // on to data in this packet. This is because we are in our
                // Receive handler (not ReceivePacket) and we can't return a
                // ref count from here.
                //
                NDIS_SET_PACKET_STATUS(MyPacket, NDIS_STATUS_RESOURCES);
                //
                // By setting NDIS_STATUS_RESOURCES, we also know that we can reclaim
                // this packet as soon as the call to NdisMIndicateReceivePacket
                // returns.
                //
                NdisMIndicateReceivePacket(pAdapt->MiniportHandle, &MyPacket, 1);
                //
                // Reclaim the indicated packet. Since we had set its status
                // to NDIS_STATUS_RESOURCES, we are guaranteed that protocols
                // above are done with it.
                //
                NdisDprFreePacket(MyPacket);
                break;
            }
        }
        else
        {
            //
            // The miniport below us uses the old-style (not packet)
            // receive indication. Fall through.
            //
        }
        //
        // Fall through if the miniport below us has either not
        // indicated a packet or we could not allocate one
        //
        pAdapt->IndicateRcvComplete = TRUE;
        switch (pAdapt->Medium)
        {
          case NdisMedium802_3:
          case NdisMediumWan:
             NdisMEthIndicateReceive(pAdapt->MiniportHandle,
                                             MacReceiveContext,
                                             HeaderBuffer,
                                             HeaderBufferSize,
                                             LookAheadBuffer,
                                             LookAheadBufferSize,
                                             PacketSize);
             break;
          case NdisMedium802_5:
             NdisMTrIndicateReceive(pAdapt->MiniportHandle,
                                            MacReceiveContext,
                                            HeaderBuffer,
                                            HeaderBufferSize,
                                            LookAheadBuffer,
                                            LookAheadBufferSize,
                                            PacketSize);
             break;
          case NdisMediumFddi:
             NdisMFddiIndicateReceive(pAdapt->MiniportHandle,
                                              MacReceiveContext,
                                              HeaderBuffer,
                                              HeaderBufferSize,
                                              LookAheadBuffer,
                                              LookAheadBufferSize,
                                              PacketSize);
             break;
          default:
             ASSERT(FALSE);
             break;
        }
    } while(FALSE);
    return Status;
}
VOID
PtReceiveComplete(
    IN  NDIS_HANDLE     ProtocolBindingContext
    )
/*++
Routine Description:
    Called by the adapter below us when it is done indicating a batch of
    received packets.
Arguments:
    ProtocolBindingContext  Pointer to our adapter structure.
Return Value:
    None
--*/
{
    PADAPT      pAdapt =(PADAPT)ProtocolBindingContext;
    if ((pAdapt->MiniportHandle != NULL) && pAdapt->IndicateRcvComplete)
    {
        switch (pAdapt->Medium)
        {
          case NdisMedium802_3:
          case NdisMediumWan:
            NdisMEthIndicateReceiveComplete(pAdapt->MiniportHandle);
            break;
          case NdisMedium802_5:
            NdisMTrIndicateReceiveComplete(pAdapt->MiniportHandle);
            break;
          case NdisMediumFddi:
            NdisMFddiIndicateReceiveComplete(pAdapt->MiniportHandle);
            break;
          default:
            ASSERT(FALSE);
            break;
        }
    }
    pAdapt->IndicateRcvComplete = FALSE;
}
INT
PtReceivePacket(
    IN  NDIS_HANDLE         ProtocolBindingContext,
    IN  PNDIS_PACKET        Packet
    )
/*++
Routine Description:
    ReceivePacket handler. Called by NDIS if the miniport below supports
    NDIS 4.0 style receives. Re-package the buffer chain in a new packet
    and indicate the new packet to protocols above us. Any context for
    packets indicated up must be kept in the MiniportReserved field.
    NDIS 5.1 - packet stacking - if there is sufficient "stack space" in
    the packet passed to us, we can use the same packet in a receive
    indication.
Arguments:
    ProtocolBindingContext - Pointer to our adapter structure.
    Packet - Pointer to the packet
Return Value:
    == 0 -> We are done with the packet
    != 0 -> We will keep the packet and call NdisReturnPackets() this
            many times when done.
--*/
{
    PADAPT              pAdapt =(PADAPT)ProtocolBindingContext;
    NDIS_STATUS         Status = NDIS_STATUS_SUCCESS;
    PNDIS_PACKET        MyPacket;
    BOOLEAN             Remaining;
    UINT        BufLength;
    MDL *   pNext;
    UINT        i;
    PUCHAR      pBuf;
    NDIS_PHYSICAL_ADDRESS phyaddr = {-1};
    PVOID pcontent = NULL;
    PVOID HeaderBuffer= NULL;
    UINT  HeaderBufferSize;
    PVOID LookAheadBuffer;
    UINT  LookAheadBufferSize;
    UINT  PacketSize;
    //
    // Drop the packet silently if the upper miniport edge isn't initialized
    //
    if (!pAdapt->MiniportHandle)
    {
          return 0;
    }
    Status = NdisAllocateMemory((PVOID)&pcontent, 2000, 0, phyaddr);
    if (Status != NDIS_STATUS_SUCCESS  )
    {
        DbgPrint("errorn");
        return 0;
    }
    NdisZeroMemory(pcontent,2000);
    NdisQueryBufferSafe(Packet->Private.Head, &pBuf, &BufLength, 32 );
    NdisMoveMemory(pcontent, pBuf, BufLength);
    i = BufLength;
    pNext = Packet->Private.Head;
    for(;;)
    {
        if(pNext == Packet->Private.Tail)
            break;
        pNext = pNext->Next;   //指针后移
        if(pNext == NULL)
            break;
        NdisQueryBufferSafe(pNext,&pBuf,&BufLength,32);
        NdisMoveMemory((PUCHAR)pcontent+i,pBuf,BufLength);
        i+=BufLength;
    }
    HeaderBuffer=pcontent;
    HeaderBufferSize=14;
    PacketSize=i;
    LookAheadBuffer=(PUCHAR)pcontent+14;
    Status=Filter(HeaderBuffer,PacketSize,HeaderBufferSize,LookAheadBuffer);
    NdisFreeMemory(pcontent,2000,0);
    if(Status!=NDIS_STATUS_SUCCESS)
            return 0;
#ifdef NDIS51
    //
    // Check if we can reuse the same packet for indicating up.
    // See also: PtReceive(). 
    //
    (VOID)NdisIMGetCurrentPacketStack(Packet, &Remaining);
    if (Remaining)
    {
        //
        // We can reuse "Packet". Indicate it up and be done with it.
        //
        Status = NDIS_GET_PACKET_STATUS(Packet);
        NdisMIndicateReceivePacket(pAdapt->MiniportHandle, &Packet, 1);
        return((Status != NDIS_STATUS_RESOURCES) ? 1 : 0);
    }
#endif // NDIS51
    //
    // Get a packet off the pool and indicate that up
    //
    NdisDprAllocatePacket(&Status,
                           &MyPacket,
                           pAdapt->RecvPacketPoolHandle);
    if (Status == NDIS_STATUS_SUCCESS)
    {
        PRECV_RSVD          RecvRsvd;
        RecvRsvd = (PRECV_RSVD)(MyPacket->MiniportReserved);
        RecvRsvd->OriginalPkt = Packet;
        MyPacket->Private.Head = Packet->Private.Head;
        MyPacket->Private.Tail = Packet->Private.Tail;
        //
        // Get the original packet (it could be the same packet as the one
        // received or a different one based on the number of layered miniports
        // below) and set it on the indicated packet so the OOB data is visible
        // correctly to protocols above us.
        //
        NDIS_SET_ORIGINAL_PACKET(MyPacket, NDIS_GET_ORIGINAL_PACKET(Packet));
        //
        // Set Packet Flags
        //
        NdisGetPacketFlags(MyPacket) = NdisGetPacketFlags(Packet);
        Status = NDIS_GET_PACKET_STATUS(Packet);
        NDIS_SET_PACKET_STATUS(MyPacket, Status);
        NDIS_SET_PACKET_HEADER_SIZE(MyPacket, NDIS_GET_PACKET_HEADER_SIZE(Packet));
        NdisMIndicateReceivePacket(pAdapt->MiniportHandle, &MyPacket, 1);
        //
        // Check if we had indicated up the packet with NDIS_STATUS_RESOURCES
        // NOTE -- do not use NDIS_GET_PACKET_STATUS(MyPacket) for this since
        // it might have changed! Use the value saved in the local variable.
        //
        if (Status == NDIS_STATUS_RESOURCES)
        {
            //
            // Our ReturnPackets handler will not be called for this packet.
            // We should reclaim it right here.
            //
            NdisDprFreePacket(MyPacket);
        }
        return((Status != NDIS_STATUS_RESOURCES) ? 1 : 0);
    }
    else
    {
        //
        // We are out of packets. Silently drop it.
        //
        return(0);
    }
}
NDIS_STATUS
PtPNPHandler(
    IN  NDIS_HANDLE     ProtocolBindingContext,
    IN  PNET_PNP_EVENT  pNetPnPEvent
    )
/*++
Routine Description:
    This is called by NDIS to notify us of a PNP event related to a lower
    binding. Based on the event, this dispatches to other helper routines.
    NDIS 5.1: forward this event to the upper protocol(s) by calling
    NdisIMNotifyPnPEvent.
Arguments:
    ProtocolBindingContext - Pointer to our adapter structure. Can be NULL
                for "global" notifications
    pNetPnPEvent - Pointer to the PNP event to be processed.
Return Value:
    NDIS_STATUS code indicating status of event processing.
--*/
{
    PADAPT          pAdapt  =(PADAPT)ProtocolBindingContext;
    NDIS_STATUS     Status  = NDIS_STATUS_SUCCESS;
    DBGPRINT(("PtPnPHandler: Adapt %p, Event %dn", pAdapt, pNetPnPEvent->NetEvent));
    switch (pNetPnPEvent->NetEvent)
    {
        case NetEventSetPower:
            Status = PtPnPNetEventSetPower(pAdapt, pNetPnPEvent);
            break;
        case NetEventReconfigure:
            Status = PtPnPNetEventReconfigure(pAdapt, pNetPnPEvent);
            break;
        default:
#ifdef NDIS51
            //
            // Pass on this notification to protocol(s) above, before
            // doing anything else with it.
            //
            if (pAdapt && pAdapt->MiniportHandle)
            {
                Status = NdisIMNotifyPnPEvent(pAdapt->MiniportHandle, pNetPnPEvent);
            }
#else
            Status = NDIS_STATUS_SUCCESS;
#endif // NDIS51
            break;
    }
    return Status;
}
NDIS_STATUS
PtPnPNetEventReconfigure(
    IN  PADAPT          pAdapt,
    IN  PNET_PNP_EVENT  pNetPnPEvent
    )
/*++
Routine Description:
    This routine is called from NDIS to notify our protocol edge of a
    reconfiguration of parameters for either a specific binding (pAdapt
    is not NULL), or global parameters if any (pAdapt is NULL).
Arguments:
    pAdapt - Pointer to our adapter structure.
    pNetPnPEvent - the reconfigure event
Return Value:
    NDIS_STATUS_SUCCESS
--*/
{
    NDIS_STATUS ReconfigStatus = NDIS_STATUS_SUCCESS;
    NDIS_STATUS ReturnStatus = NDIS_STATUS_SUCCESS;
    do
    {
        //
        // Is this is a global reconfiguration notification ?
        //
        if (pAdapt == NULL)
        {
            //
            // An important event that causes this notification to us is if
            // one of our upper-edge miniport instances was enabled after being
            // disabled earlier, e.g. from Device Manager in Win2000. Note that
            // NDIS calls this because we had set up an association between our
            // miniport and protocol entities by calling NdisIMAssociateMiniport.
            //
            // Since we would have torn down the lower binding for that miniport,
            // we need NDIS' assistance to re-bind to the lower miniport. The
            // call to NdisReEnumerateProtocolBindings does exactly that.
            //
            NdisReEnumerateProtocolBindings (ProtHandle);       
            break;
        }
#ifdef NDIS51
        //
        // Pass on this notification to protocol(s) above before doing anything
        // with it.
        //
        if (pAdapt->MiniportHandle)
        {
            ReturnStatus = NdisIMNotifyPnPEvent(pAdapt->MiniportHandle, pNetPnPEvent);
        }
#endif // NDIS51
        ReconfigStatus = NDIS_STATUS_SUCCESS;
    } while(FALSE);
    DBGPRINT(("<==PtPNPNetEventReconfigure: pAdapt %pn", pAdapt));
#ifdef NDIS51
    //
    // Overwrite status with what upper-layer protocol(s) returned.
    //
    ReconfigStatus = ReturnStatus;
#endif
    return ReconfigStatus;
}
NDIS_STATUS
PtPnPNetEventSetPower(
    IN  PADAPT          pAdapt,
    IN  PNET_PNP_EVENT  pNetPnPEvent
    )
/*++
Routine Description:
    This is a notification to our protocol edge of the power state
    of the lower miniport. If it is going to a low-power state, we must
    wait here for all outstanding sends and requests to complete.
    NDIS 5.1:  Since we use packet stacking, it is not sufficient to
    check usage of our local send packet pool to detect whether or not
    all outstanding sends have completed. For this, use the new API
    NdisQueryPendingIOCount.
    NDIS 5.1: Use the 5.1 API NdisIMNotifyPnPEvent to pass on PnP
    notifications to upper protocol(s).
Arguments:
    pAdapt          -   Pointer to the adpater structure
    pNetPnPEvent    -   The Net Pnp Event. this contains the new device state
Return Value:
    NDIS_STATUS_SUCCESS or the status returned by upper-layer protocols.
--*/
{
    PNDIS_DEVICE_POWER_STATE    pDeviceState  =(PNDIS_DEVICE_POWER_STATE)(pNetPnPEvent->Buffer);
    NDIS_DEVICE_POWER_STATE     PrevDeviceState = pAdapt->PTDeviceState;  
    NDIS_STATUS                 Status;
    NDIS_STATUS                 ReturnStatus;
#ifdef NDIS51
    ULONG                       PendingIoCount = 0;
#endif // NDIS51
    ReturnStatus = NDIS_STATUS_SUCCESS;
    //
    // Set the Internal Device State, this blocks all new sends or receives
    //
    pAdapt->PTDeviceState = *pDeviceState;
    //
    // Check if the miniport below is going to a low power state.
    //
    if (*pDeviceState > NdisDeviceStateD0)
    {
#ifdef NDIS51
        //
        // Notify upper layer protocol(s) first.
        //
        if (pAdapt->MiniportHandle != NULL)
        {
            ReturnStatus = NdisIMNotifyPnPEvent(pAdapt->MiniportHandle, pNetPnPEvent);
        }
#endif // NDIS51
        //
        // If the miniport below is going to standby, fail all incoming requests
        //
        if (PrevDeviceState == NdisDeviceStateD0)
        {
            pAdapt->StandingBy = TRUE;
        }
        //
        // Wait for outstanding sends and requests to complete.
        //
#ifdef NDIS51
        do
        {
            Status = NdisQueryPendingIOCount(pAdapt->BindingHandle, &PendingIoCount);
            if ((Status != NDIS_STATUS_SUCCESS) ||
                (PendingIoCount == 0))
            {
                break;
            }
            NdisMSleep(2);
        }
        while (TRUE);
#else
        while (NdisPacketPoolUsage(pAdapt->SendPacketPoolHandle) != 0)
        {
            NdisMSleep(2);
        }
        while (pAdapt->OutstandingRequests == TRUE)
        {
            //
            // sleep till outstanding requests complete
            //
            NdisMSleep(2);
        }
#endif // NDIS51
        ASSERT(NdisPacketPoolUsage(pAdapt->SendPacketPoolHandle) == 0);
        ASSERT(pAdapt->OutstandingRequests == FALSE);
    }
    else
    {
        //
        // The device below is being turned on. If we had a request
        // pending, send it down now.
        //
        if (pAdapt->QueuedRequest == TRUE)
        {
            pAdapt->QueuedRequest = FALSE;
            NdisRequest(&Status,
                        pAdapt->BindingHandle,
                        &pAdapt->Request);
            if (Status != NDIS_STATUS_PENDING)
            {
                PtRequestComplete(pAdapt,
                                  &pAdapt->Request,
                                  Status);
            }
        }
        //
        // If the physical miniport is powering up (from Low power state to D0), 
        // clear the flag
        //
        if (PrevDeviceState > NdisDeviceStateD0)
        {
            pAdapt->StandingBy = FALSE;
        }
#ifdef NDIS51
        //
        // Pass on this notification to protocol(s) above
        //
        if (pAdapt->MiniportHandle)
        {
            ReturnStatus = NdisIMNotifyPnPEvent(pAdapt->MiniportHandle, pNetPnPEvent);
        }
#endif // NDIS51
    }
    return ReturnStatus;
}

						