Contributed-under: TianoCore Contribution Agreement 1.0 Signed-off-by: Laszlo Ersek <ler...@redhat.com> --- OvmfPkg/VirtioNetDxe/SnpReceiveFilters.c | 107 ++++++++++++++++++++++++++++++ 1 files changed, 107 insertions(+), 0 deletions(-) create mode 100644 OvmfPkg/VirtioNetDxe/SnpReceiveFilters.c
diff --git a/OvmfPkg/VirtioNetDxe/SnpReceiveFilters.c b/OvmfPkg/VirtioNetDxe/SnpReceiveFilters.c new file mode 100644 index 0000000..0e6bdf3 --- /dev/null +++ b/OvmfPkg/VirtioNetDxe/SnpReceiveFilters.c @@ -0,0 +1,107 @@ +/** @file + + Implementation of the SNP.ReceiveFilters() function and its private helpers + if any. + + Copyright (C) 2013, Red Hat, Inc. + + UEFI API documentation: + 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; +} -- 1.7.1 ------------------------------------------------------------------------------ AlienVault Unified Security Management (USM) platform delivers complete security visibility with the essential security capabilities. Easily and efficiently configure, manage, and operate all of your security controls from a single console and one unified framework. Download a free trial. http://p.sf.net/sfu/alienvault_d2d _______________________________________________ edk2-devel mailing list edk2-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/edk2-devel
