MdeModulePkg/Universal/Network/SnpDxe/Mcast_ip_to_mac.c

   1 /** @file
   2 Copyright (c) 2004 - 2007, Intel Corporation
   3 All rights reserved. This program and the accompanying materials
   4 are licensed and made available under the terms and conditions of the BSD License
   5 which accompanies this distribution.  The full text of the license may be found at
   6 http://opensource.org/licenses/bsd-license.php
   7
   8 THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
   9 WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
  10
  11 Module name:
  12   mcast_ip_to_mac.c
  13
  14 Abstract:
  15
  16 Revision history:
  17   2000-Feb-17 M(f)J   Genesis.
  18
  19 **/
  20
  21 #include "Snp.h"
  22
  23 /**
  24   this routine calls undi to convert an multicast IP address to a MAC address
  25
  26   @param  snp   pointer to snp driver structure
  27   @param  IPv6  flag to indicate if this is an ipv6 address
  28   @param  IP    multicast IP address
  29   @param  MAC   pointer to hold the return MAC address
  30
  31
  32 **/
  33 EFI_STATUS
  34 pxe_ip2mac (
  35   IN SNP_DRIVER          *snp,
  36   IN BOOLEAN             IPv6,
  37   IN EFI_IP_ADDRESS      *IP,
  38   IN OUT EFI_MAC_ADDRESS *MAC
  39   )
  40 {
  41   PXE_CPB_MCAST_IP_TO_MAC *cpb;
  42   PXE_DB_MCAST_IP_TO_MAC  *db;
  43
  44   cpb                 = snp->cpb;
  45   db                  = snp->db;
  46   snp->cdb.OpCode     = PXE_OPCODE_MCAST_IP_TO_MAC;
  47   snp->cdb.OpFlags    = (UINT16) (IPv6 ? PXE_OPFLAGS_MCAST_IPV6_TO_MAC : PXE_OPFLAGS_MCAST_IPV4_TO_MAC);
  48   snp->cdb.CPBsize    = sizeof (PXE_CPB_MCAST_IP_TO_MAC);
  49   snp->cdb.DBsize     = sizeof (PXE_DB_MCAST_IP_TO_MAC);
  50
  51   snp->cdb.CPBaddr    = (UINT64)(UINTN) cpb;
  52   snp->cdb.DBaddr     = (UINT64)(UINTN) db;
  53
  54   snp->cdb.StatCode   = PXE_STATCODE_INITIALIZE;
  55   snp->cdb.StatFlags  = PXE_STATFLAGS_INITIALIZE;
  56   snp->cdb.IFnum      = snp->if_num;
  57   snp->cdb.Control    = PXE_CONTROL_LAST_CDB_IN_LIST;
  58
  59   CopyMem (&cpb->IP, IP, sizeof (PXE_IP_ADDR));
  60
  61   //
  62   // Issue UNDI command and check result.
  63   //
  64   DEBUG ((EFI_D_NET, "\nsnp->undi.mcast_ip_to_mac()  "));
  65
  66   (*snp->issue_undi32_command) ((UINT64)(UINTN) &snp->cdb);
  67
  68   switch (snp->cdb.StatCode) {
  69   case PXE_STATCODE_SUCCESS:
  70     break;
  71
  72   case PXE_STATCODE_INVALID_CPB:
  73     return EFI_INVALID_PARAMETER;
  74
  75   case PXE_STATCODE_UNSUPPORTED:
  76     DEBUG (
  77       (EFI_D_NET,
  78       "\nsnp->undi.mcast_ip_to_mac()  %xh:%xh\n",
  79       snp->cdb.StatFlags,
  80       snp->cdb.StatCode)
  81       );
  82     return EFI_UNSUPPORTED;
  83
  84   default:
  85     //
  86     // UNDI command failed.  Return EFI_DEVICE_ERROR
  87     // to caller.
  88     //
  89     DEBUG (
  90       (EFI_D_NET,
  91       "\nsnp->undi.mcast_ip_to_mac()  %xh:%xh\n",
  92       snp->cdb.StatFlags,
  93       snp->cdb.StatCode)
  94       );
  95
  96     return EFI_DEVICE_ERROR;
  97   }
  98
  99   CopyMem (MAC, &db->MAC, sizeof (PXE_MAC_ADDR));
 100   return EFI_SUCCESS;
 101 }
 102
 103
 104 /**
 105   This is the SNP interface routine for converting a multicast IP address to
 106   a MAC address.
 107   This routine basically retrieves snp structure, checks the SNP state and
 108   calls the pxe_ip2mac routine to actually do the conversion
 109
 110   @param  this  context pointer
 111   @param  IPv6  flag to indicate if this is an ipv6 address
 112   @param  IP    multicast IP address
 113   @param  MAC   pointer to hold the return MAC address
 114
 115
 116 **/
 117 EFI_STATUS
 118 EFIAPI
 119 snp_undi32_mcast_ip_to_mac (
 120   IN EFI_SIMPLE_NETWORK_PROTOCOL *this,
 121   IN BOOLEAN                     IPv6,
 122   IN EFI_IP_ADDRESS              *IP,
 123   OUT EFI_MAC_ADDRESS            *MAC
 124   )
 125 {
 126   SNP_DRIVER  *snp;
 127   EFI_TPL     OldTpl;
 128   EFI_STATUS  Status;
 129
 130   //
 131   // Get pointer to SNP driver instance for *this.
 132   //
 133   if (this == NULL) {
 134     return EFI_INVALID_PARAMETER;
 135   }
 136
 137   if (IP == NULL || MAC == NULL) {
 138     return EFI_INVALID_PARAMETER;
 139   }
 140
 141   snp = EFI_SIMPLE_NETWORK_DEV_FROM_THIS (this);
 142
 143   OldTpl = gBS->RaiseTPL (TPL_CALLBACK);
 144
 145   switch (snp->mode.State) {
 146   case EfiSimpleNetworkInitialized:
 147     break;
 148
 149   case EfiSimpleNetworkStopped:
 150     Status = EFI_NOT_STARTED;
 151     goto ON_EXIT;
 152
 153   default:
 154     Status = EFI_DEVICE_ERROR;
 155     goto ON_EXIT;
 156   }
 157
 158   Status = pxe_ip2mac (snp, IPv6, IP, MAC);
 159
 160 ON_EXIT:
 161   gBS->RestoreTPL (OldTpl);
 162
 163   return Status;
 164 }