1 /** @file 2 3 Implementation of the SNP.ReceiveFilters() function and its private helpers 4 if any. 5 6 Copyright (C) 2013, Red Hat, Inc. 7 Copyright (c) 2006 - 2010, Intel Corporation. All rights reserved.<BR> 8 9 This program and the accompanying materials are licensed and made available 10 under the terms and conditions of the BSD License which accompanies this 11 distribution. The full text of the license may be found at 12 http://opensource.org/licenses/bsd-license.php 13 14 THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS, WITHOUT 15 WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED. 16 17 **/ 18 19 #include <Library/UefiBootServicesTableLib.h> 20 21 #include "VirtioNet.h" 22 23 /** 24 Manages the multicast receive filters of a network interface. 25 26 @param This The protocol instance pointer. 27 @param Enable A bit mask of receive filters to enable on the 28 network interface. 29 @param Disable A bit mask of receive filters to disable on the 30 network interface. 31 @param ResetMCastFilter Set to TRUE to reset the contents of the multicast 32 receive filters on the network interface to their 33 default values. 34 @param McastFilterCnt Number of multicast HW MAC addresses in the new 35 MCastFilter list. This value must be less than or 36 equal to the MCastFilterCnt field of 37 EFI_SIMPLE_NETWORK_MODE. This field is optional if 38 ResetMCastFilter is TRUE. 39 @param MCastFilter A pointer to a list of new multicast receive filter 40 HW MAC addresses. This list will replace any 41 existing multicast HW MAC address list. This field 42 is optional if ResetMCastFilter is TRUE. 43 44 @retval EFI_SUCCESS The multicast receive filter list was updated. 45 @retval EFI_NOT_STARTED The network interface has not been started. 46 @retval EFI_INVALID_PARAMETER One or more of the parameters has an 47 unsupported value. 48 @retval EFI_DEVICE_ERROR The command could not be sent to the network 49 interface. 50 @retval EFI_UNSUPPORTED This function is not supported by the network 51 interface. 52 53 **/ 54 55 EFI_STATUS 56 EFIAPI 57 VirtioNetReceiveFilters ( 58 IN EFI_SIMPLE_NETWORK_PROTOCOL *This, 59 IN UINT32 Enable, 60 IN UINT32 Disable, 61 IN BOOLEAN ResetMCastFilter, 62 IN UINTN MCastFilterCnt OPTIONAL, 63 IN EFI_MAC_ADDRESS *MCastFilter OPTIONAL 64 ) 65 { 66 VNET_DEV *Dev; 67 EFI_TPL OldTpl; 68 EFI_STATUS Status; 69 70 if (This == NULL) { 71 return EFI_INVALID_PARAMETER; 72 } 73 74 Dev = VIRTIO_NET_FROM_SNP (This); 75 OldTpl = gBS->RaiseTPL (TPL_CALLBACK); 76 switch (Dev->Snm.State) { 77 case EfiSimpleNetworkStopped: 78 Status = EFI_NOT_STARTED; 79 goto Exit; 80 case EfiSimpleNetworkStarted: 81 Status = EFI_DEVICE_ERROR; 82 goto Exit; 83 default: 84 break; 85 } 86 87 // 88 // MNP apparently fails to initialize on top of us if we simply return 89 // EFI_UNSUPPORTED in this function. 90 // 91 // Hence we openly refuse multicast functionality, and fake the rest by 92 // selecting a no stricter filter setting than whatever is requested. The 93 // UEFI-2.3.1+errC spec allows this. In practice we don't change our current 94 // (default) filter. Additionally, receiving software is responsible for 95 // discarding any packets getting through the filter. 96 // 97 Status = ( 98 ((Enable | Disable) & ~Dev->Snm.ReceiveFilterMask) != 0 || 99 (!ResetMCastFilter && MCastFilterCnt > Dev->Snm.MaxMCastFilterCount) 100 ) ? EFI_INVALID_PARAMETER : EFI_SUCCESS; 101 102 Exit: 103 gBS->RestoreTPL (OldTpl); 104 return Status; 105 } 106
