AppPkg/Applications/Sockets/GetHostByAddr/GetHostByAddr.c

   1 /** @file
   2   Translate the port number into a service name
   3
   4   Copyright (c) 2011 - 2012, Intel Corporation. All rights reserved.<BR>
   5   This program and the accompanying materials
   6   are licensed and made available under the terms and conditions of the BSD License
   7   which accompanies this distribution.  The full text of the license may be found at
   8   http://opensource.org/licenses/bsd-license.php
   9
  10   THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
  11   WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
  12 **/
  13 #include <errno.h>
  14 #include <netdb.h>
  15 #include <stdio.h>
  16 #include <string.h>
  17 #include <Uefi.h>
  18 #include <unistd.h>
  19
  20 #include <arpa/nameser.h>
  21 #include <arpa/nameser_compat.h>
  22
  23 #include <Library/DebugLib.h>
  24 #include <Library/UefiLib.h>
  25
  26 #include <sys/socket.h>
  27
  28 /**
  29   Translate the IP address into a host name
  30
  31   @param[in] Argc   The number of arguments
  32   @param[in] Argv   The argument value array
  33
  34   @retval  0        The application exited normally.
  35   @retval  Other    An error occurred.
  36 **/
  37 int
  38 main (
  39   IN int Argc,
  40   IN char **Argv
  41   )
  42 {
  43   UINTN Index;
  44   UINT8 IpAddress[4];
  45   struct hostent * pHost;
  46   UINT8 * pIpAddress;
  47   char ** ppName;
  48   UINT32 RemoteAddress[4];
  49
  50   //
  51   //  Determine if the IPv4 address is specified
  52   //
  53   if (( 2 != Argc )
  54     || ( 4 != sscanf ( Argv[1],
  55                        "%d.%d.%d.%d",
  56                        &RemoteAddress[0],
  57                        &RemoteAddress[1],
  58                        &RemoteAddress[2],
  59                        &RemoteAddress[3]))
  60     || ( 255 < RemoteAddress[0])
  61     || ( 255 < RemoteAddress[1])
  62     || ( 255 < RemoteAddress[2])
  63     || ( 255 < RemoteAddress[3])) {
  64     Print ( L"%a  <IPv4 Address>\r\n", Argv[0]);
  65   }
  66   else {
  67     //
  68     //  Translate the address into a host name
  69     //
  70     IpAddress[0] = (UINT8)RemoteAddress[0];
  71     IpAddress[1] = (UINT8)RemoteAddress[1];
  72     IpAddress[2] = (UINT8)RemoteAddress[2];
  73     IpAddress[3] = (UINT8)RemoteAddress[3];
  74     pHost = gethostbyaddr ( (const char *)&IpAddress[0], INADDRSZ, AF_INET );
  75     if ( NULL == pHost ) {
  76       Print ( L"ERROR - host not found, h_errno: %d\r\n", h_errno );
  77     }
  78     else {
  79       pIpAddress = (UINT8 *)pHost->h_addr_list[ 0 ];
  80       Print ( L"%d.%d.%d.%d, %a\r\n",
  81               pIpAddress[0],
  82               pIpAddress[1],
  83               pIpAddress[2],
  84               pIpAddress[3],
  85               pHost->h_name );
  86
  87       //
  88       //  Display the other addresses
  89       //
  90       for ( Index = 1; NULL != pHost->h_addr_list[Index]; Index++ ) {
  91         pIpAddress = (UINT8 *)pHost->h_addr_list[Index];
  92         Print ( L"%d.%d.%d.%d\r\n",
  93                 pIpAddress[0],
  94                 pIpAddress[1],
  95                 pIpAddress[2],
  96                 pIpAddress[3]);
  97       }
  98
  99       //
 100       //  Display the list of aliases
 101       //
 102       ppName = pHost->h_aliases;
 103       if (( NULL == ppName ) || ( NULL == *ppName )) {
 104         Print ( L"No aliases\r\n" );
 105       }
 106       else {
 107         Print ( L"Aliases: " );
 108         while ( NULL != *ppName ) {
 109           //
 110           //  Display the alias
 111           //
 112           Print ( L"%a", *ppName );
 113
 114           //
 115           //  Set the next alias
 116           //
 117           ppName += 1;
 118           if ( NULL != *ppName ) {
 119             Print ( L", " );
 120           }
 121         }
 122         Print ( L"\r\n" );
 123       }
 124     }
 125   }
 126
 127   //
 128   //  All done
 129   //
 130   return errno;
 131 }