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   SPDX-License-Identifier: BSD-2-Clause-Patent
   6 **/
   7 #include <errno.h>
   8 #include <netdb.h>
   9 #include <stdio.h>
  10 #include <string.h>
  11 #include <Uefi.h>
  12 #include <unistd.h>
  13
  14 #include <arpa/nameser.h>
  15 #include <arpa/nameser_compat.h>
  16
  17 #include <Library/DebugLib.h>
  18 #include <Library/UefiLib.h>
  19
  20 #include <sys/socket.h>
  21
  22 /**
  23   Translate the IP address into a host name
  24
  25   @param[in] Argc   The number of arguments
  26   @param[in] Argv   The argument value array
  27
  28   @retval  0        The application exited normally.
  29   @retval  Other    An error occurred.
  30 **/
  31 int
  32 main (
  33   IN int Argc,
  34   IN char **Argv
  35   )
  36 {
  37   UINTN Index;
  38   UINT8 IpAddress[4];
  39   struct hostent * pHost;
  40   UINT8 * pIpAddress;
  41   char ** ppName;
  42   UINT32 RemoteAddress[4];
  43
  44   //
  45   //  Determine if the IPv4 address is specified
  46   //
  47   if (( 2 != Argc )
  48     || ( 4 != sscanf ( Argv[1],
  49                        "%d.%d.%d.%d",
  50                        &RemoteAddress[0],
  51                        &RemoteAddress[1],
  52                        &RemoteAddress[2],
  53                        &RemoteAddress[3]))
  54     || ( 255 < RemoteAddress[0])
  55     || ( 255 < RemoteAddress[1])
  56     || ( 255 < RemoteAddress[2])
  57     || ( 255 < RemoteAddress[3])) {
  58     Print ( L"%a  <IPv4 Address>\r\n", Argv[0]);
  59   }
  60   else {
  61     //
  62     //  Translate the address into a host name
  63     //
  64     IpAddress[0] = (UINT8)RemoteAddress[0];
  65     IpAddress[1] = (UINT8)RemoteAddress[1];
  66     IpAddress[2] = (UINT8)RemoteAddress[2];
  67     IpAddress[3] = (UINT8)RemoteAddress[3];
  68     pHost = gethostbyaddr ( (const char *)&IpAddress[0], INADDRSZ, AF_INET );
  69     if ( NULL == pHost ) {
  70       Print ( L"ERROR - host not found, h_errno: %d\r\n", h_errno );
  71     }
  72     else {
  73       pIpAddress = (UINT8 *)pHost->h_addr_list[ 0 ];
  74       Print ( L"%d.%d.%d.%d, %a\r\n",
  75               pIpAddress[0],
  76               pIpAddress[1],
  77               pIpAddress[2],
  78               pIpAddress[3],
  79               pHost->h_name );
  80
  81       //
  82       //  Display the other addresses
  83       //
  84       for ( Index = 1; NULL != pHost->h_addr_list[Index]; Index++ ) {
  85         pIpAddress = (UINT8 *)pHost->h_addr_list[Index];
  86         Print ( L"%d.%d.%d.%d\r\n",
  87                 pIpAddress[0],
  88                 pIpAddress[1],
  89                 pIpAddress[2],
  90                 pIpAddress[3]);
  91       }
  92
  93       //
  94       //  Display the list of aliases
  95       //
  96       ppName = pHost->h_aliases;
  97       if (( NULL == ppName ) || ( NULL == *ppName )) {
  98         Print ( L"No aliases\r\n" );
  99       }
 100       else {
 101         Print ( L"Aliases: " );
 102         while ( NULL != *ppName ) {
 103           //
 104           //  Display the alias
 105           //
 106           Print ( L"%a", *ppName );
 107
 108           //
 109           //  Set the next alias
 110           //
 111           ppName += 1;
 112           if ( NULL != *ppName ) {
 113             Print ( L", " );
 114           }
 115         }
 116         Print ( L"\r\n" );
 117       }
 118     }
 119   }
 120
 121   //
 122   //  All done
 123   //
 124   return errno;
 125 }