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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>
SPDX-License-Identifier: BSD-2-Clause-Patent
**/
#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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