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/** @file
Implementation of the SNP.ReceiveFilters() function and its private helpers
if any.
Copyright (C) 2013, Red Hat, Inc.
Copyright (c) 2006 - 2010, Intel Corporation. All rights reserved.<BR>
This program and the accompanying materials are licensed and made available
under the terms and conditions of the BSD License which accompanies this
distribution. The full text of the license may be found at
http://opensource.org/licenses/bsd-license.php
THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS, WITHOUT
WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
**/
#include <Library/UefiBootServicesTableLib.h>
#include "VirtioNet.h"
/**
Manages the multicast receive filters of a network interface.
@param This The protocol instance pointer.
@param Enable A bit mask of receive filters to enable on the
network interface.
@param Disable A bit mask of receive filters to disable on the
network interface.
@param ResetMCastFilter Set to TRUE to reset the contents of the multicast
receive filters on the network interface to their
default values.
@param McastFilterCnt Number of multicast HW MAC addresses in the new
MCastFilter list. This value must be less than or
equal to the MCastFilterCnt field of
EFI_SIMPLE_NETWORK_MODE. This field is optional if
ResetMCastFilter is TRUE.
@param MCastFilter A pointer to a list of new multicast receive filter
HW MAC addresses. This list will replace any
existing multicast HW MAC address list. This field
is optional if ResetMCastFilter is TRUE.
@retval EFI_SUCCESS The multicast receive filter list was updated.
@retval EFI_NOT_STARTED The network interface has not been started.
@retval EFI_INVALID_PARAMETER One or more of the parameters has an
unsupported value.
@retval EFI_DEVICE_ERROR The command could not be sent to the network
interface.
@retval EFI_UNSUPPORTED This function is not supported by the network
interface.
**/
EFI_STATUS
EFIAPI
VirtioNetReceiveFilters (
IN EFI_SIMPLE_NETWORK_PROTOCOL *This,
IN UINT32 Enable,
IN UINT32 Disable,
IN BOOLEAN ResetMCastFilter,
IN UINTN MCastFilterCnt OPTIONAL,
IN EFI_MAC_ADDRESS *MCastFilter OPTIONAL
)
{
VNET_DEV *Dev;
EFI_TPL OldTpl;
EFI_STATUS Status;
if (This == NULL) {
return EFI_INVALID_PARAMETER;
}
Dev = VIRTIO_NET_FROM_SNP (This);
OldTpl = gBS->RaiseTPL (TPL_CALLBACK);
switch (Dev->Snm.State) {
case EfiSimpleNetworkStopped:
Status = EFI_NOT_STARTED;
goto Exit;
case EfiSimpleNetworkStarted:
Status = EFI_DEVICE_ERROR;
goto Exit;
default:
break;
}
//
// MNP apparently fails to initialize on top of us if we simply return
// EFI_UNSUPPORTED in this function.
//
// Hence we openly refuse multicast functionality, and fake the rest by
// selecting a no stricter filter setting than whatever is requested. The
// UEFI-2.3.1+errC spec allows this. In practice we don't change our current
// (default) filter. Additionally, receiving software is responsible for
// discarding any packets getting through the filter.
//
Status = (
((Enable | Disable) & ~Dev->Snm.ReceiveFilterMask) != 0 ||
(!ResetMCastFilter && MCastFilterCnt > Dev->Snm.MaxMCastFilterCount)
) ? EFI_INVALID_PARAMETER : EFI_SUCCESS;
Exit:
gBS->RestoreTPL (OldTpl);
return Status;
}
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