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