/* Copyright (C) 2008 Free Software Foundation, Inc.
   This file is part of the GNU C Library.
   Contributed by David Bartley <dtbartle@csclub.uwaterloo.ca>, 2008.

   The GNU C Library is free software; you can redistribute it and/or
   modify it under the terms of the GNU Lesser General Public
   License as published by the Free Software Foundation; either
   version 2.1 of the License, or (at your option) any later version.

   The GNU C Library is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
   Lesser General Public License for more details.

   You should have received a copy of the GNU Lesser General Public
   License along with the GNU C Library; if not, write to the Free
   Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
   02111-1307 USA.  */

#include <netinet/ether.h>
#include <stdlib.h>
#include <string.h>

char * _link_ntoa (const unsigned char *macaddr, char *str, int size,
      int mactype)
{
  if (size != sizeof (struct ether_addr))
    return NULL;

  char *ret = str;
  if (!ret)
    {
      /* 2 chars + 1 colon per byte.  */
      ret = malloc (3 * size);
      if (!ret)
        return NULL;
    }

  struct ether_addr addr;
  if (ether_ntoa_r (&addr, ret) == NULL)
    {
      if (!str)
        free (ret);
      return NULL;
    }

  return ret;
}