audk/AppPkg/Applications/Sockets/GetNetByAddr/GetNetByAddr.c

/** @file
  Translate the IPv4 address into a network name

  Copyright (c) 2011, Intel Corporation
  All rights reserved. This program and the accompanying materials
  are licensed and made available under the terms and conditions of the BSD License
  which accompanies this distribution.  The full text of the license may be found at
  http://opensource.org/licenses/bsd-license.php

  THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
  WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.

**/

#include <errno.h>
#include <netdb.h>
#include <stdio.h>
#include <string.h>
#include <Uefi.h>
#include <unistd.h>

#include <Library/DebugLib.h>
#include <Library/UefiLib.h>

#include <sys/socket.h>

/**
  Translate the IPv4 address into a network name

  @param [in] Argc  The number of arguments
  @param [in] Argv  The argument value array

  @retval  0        The application exited normally.
  @retval  Other    An error occurred.
**/
int
main (
  IN int Argc,
  IN char **Argv
  )
{
  UINT32 RemoteAddress[4];
  UINT8 IpAddress[4];
  struct netent * pNetwork;
  
  //
  //  Determine if the IPv4 address is specified
  //
  if (( 2 != Argc )
    || ( 4 != sscanf ( Argv[1],
                       "%d.%d.%d.%d",
                       &RemoteAddress[0],
                       &RemoteAddress[1],
                       &RemoteAddress[2],
                       &RemoteAddress[3]))
    || ( 255 < RemoteAddress[0])
    || ( 255 < RemoteAddress[1])
    || ( 255 < RemoteAddress[2])
    || ( 255 < RemoteAddress[3])) {
    Print ( L"%a  <IPv4 Address>\r\n", Argv[0]);
  }
  else {
    //
    //  Translate the address into a network name
    //
    IpAddress[0] = (UINT8)RemoteAddress[0];
    IpAddress[1] = (UINT8)RemoteAddress[1];
    IpAddress[2] = (UINT8)RemoteAddress[2];
    IpAddress[3] = (UINT8)RemoteAddress[3];
    pNetwork = getnetbyaddr ( *(uint32_t *)&IpAddress[0], AF_INET );
    if ( NULL == pNetwork ) {
      Print ( L"ERROR - network not found, errno: %d\r\n", errno );
    }
    else {
      Print ( L"%a: %d.%d.%d.%d, 0x%08x\r\n",
              pNetwork->n_name,
              IpAddress[0],
              IpAddress[1],
              IpAddress[2],
              IpAddress[3],
              pNetwork->n_net );
    }
  }
  
  //
  //  All done
  //
  return errno;
}