OvmfPkg: Apply uncrustify changes

[mirror_edk2.git] / OvmfPkg / VirtioNetDxe / SnpMcastIpToMac.c

/** @file\r
\r
  Implementation of the SNP.McastIpToMac() function and its private helpers if\r
  any.\r
\r
  Copyright (C) 2013, Red Hat, Inc.\r
  Copyright (c) 2006 - 2010, Intel Corporation. All rights reserved.<BR>\r
\r
  SPDX-License-Identifier: BSD-2-Clause-Patent\r
\r
**/\r
\r
#include <Library/UefiBootServicesTableLib.h>\r
\r
#include "VirtioNet.h"\r
\r
/**\r
  Converts a multicast IP address to a multicast HW MAC address.\r
\r
  @param  This The protocol instance pointer.\r
  @param  IPv6 Set to TRUE if the multicast IP address is IPv6 [RFC 2460]. Set\r
               to FALSE if the multicast IP address is IPv4 [RFC 791].\r
  @param  IP   The multicast IP address that is to be converted to a multicast\r
               HW MAC address.\r
  @param  MAC  The multicast HW MAC address that is to be generated from IP.\r
\r
  @retval EFI_SUCCESS           The multicast IP address was mapped to the\r
                                multicast HW MAC address.\r
  @retval EFI_NOT_STARTED       The network interface has not been started.\r
  @retval EFI_BUFFER_TOO_SMALL  The Statistics buffer was too small. The\r
                                current buffer size needed to hold the\r
                                statistics is returned in StatisticsSize.\r
  @retval EFI_INVALID_PARAMETER One or more of the parameters has an\r
                                unsupported value.\r
  @retval EFI_DEVICE_ERROR      The command could not be sent to the network\r
                                interface.\r
  @retval EFI_UNSUPPORTED       This function is not supported by the network\r
                                interface.\r
\r
**/\r
EFI_STATUS\r
EFIAPI\r
VirtioNetMcastIpToMac (\r
  IN EFI_SIMPLE_NETWORK_PROTOCOL  *This,\r
  IN BOOLEAN                      IPv6,\r
  IN EFI_IP_ADDRESS               *Ip,\r
  OUT EFI_MAC_ADDRESS             *Mac\r
  )\r
{\r
  VNET_DEV    *Dev;\r
  EFI_TPL     OldTpl;\r
  EFI_STATUS  Status;\r
\r
  //\r
  // http://en.wikipedia.org/wiki/Multicast_address\r
  //\r
  if ((This == NULL) || (Ip == NULL) || (Mac == NULL) ||\r
      (IPv6 && ((Ip->v6.Addr[0]) != 0xFF)) ||       // invalid IPv6 mcast addr\r
      (!IPv6 && ((Ip->v4.Addr[0] & 0xF0) != 0xE0))  // invalid IPv4 mcast addr\r
      )\r
  {\r
    return EFI_INVALID_PARAMETER;\r
  }\r
\r
  Dev    = VIRTIO_NET_FROM_SNP (This);\r
  OldTpl = gBS->RaiseTPL (TPL_CALLBACK);\r
  switch (Dev->Snm.State) {\r
    case EfiSimpleNetworkStopped:\r
      Status = EFI_NOT_STARTED;\r
      goto Exit;\r
    case EfiSimpleNetworkStarted:\r
      Status = EFI_DEVICE_ERROR;\r
      goto Exit;\r
    default:\r
      break;\r
  }\r
\r
  //\r
  // http://en.wikipedia.org/wiki/IP_multicast#Layer_2_delivery\r
  //\r
  if (IPv6) {\r
    Mac->Addr[0] = 0x33;\r
    Mac->Addr[1] = 0x33;\r
    Mac->Addr[2] = Ip->v6.Addr[12];\r
    Mac->Addr[3] = Ip->v6.Addr[13];\r
    Mac->Addr[4] = Ip->v6.Addr[14];\r
    Mac->Addr[5] = Ip->v6.Addr[15];\r
  } else {\r
    Mac->Addr[0] = 0x01;\r
    Mac->Addr[1] = 0x00;\r
    Mac->Addr[2] = 0x5E;\r
    Mac->Addr[3] = Ip->v4.Addr[1] & 0x7F;\r
    Mac->Addr[4] = Ip->v4.Addr[2];\r
    Mac->Addr[5] = Ip->v4.Addr[3];\r
  }\r
\r
  Status = EFI_SUCCESS;\r
\r
Exit:\r
  gBS->RestoreTPL (OldTpl);\r
  return Status;\r
}\r