nss/nss_files/files-ethers.c

   1 /* Copyright (C) 1996, 1997 Free Software Foundation, Inc.
   2    This file is part of the GNU C Library.
   3
   4    The GNU C Library is free software; you can redistribute it and/or
   5    modify it under the terms of the GNU Library General Public License as
   6    published by the Free Software Foundation; either version 2 of the
   7    License, or (at your option) any later version.
   8
   9    The GNU C Library is distributed in the hope that it will be useful,
  10    but WITHOUT ANY WARRANTY; without even the implied warranty of
  11    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  12    Library General Public License for more details.
  13
  14    You should have received a copy of the GNU Library General Public
  15    License along with the GNU C Library; see the file COPYING.LIB.  If not,
  16    write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
  17    Boston, MA 02111-1307, USA.  */
  18
  19 #include <string.h>
  20 #include <netinet/if_ether.h>
  21
  22 /* Because the `ethers' lookup does not fit so well in the scheme so
  23    we define a dummy struct here which helps us to use the available
  24    functions.  */
  25 struct etherent
  26 {
  27   const char *e_name;
  28   struct ether_addr e_addr;
  29 };
  30 struct etherent_data {};
  31
  32 #define ENTNAME         etherent
  33 #define DATABASE        "ethers"
  34 #include "files-parse.c"
  35 LINE_PARSER
  36 ("#",
  37  /* Read the ethernet address: 6 x 8bit hexadecimal number.  */
  38  {
  39    size_t cnt;
  40
  41    for (cnt = 0; cnt < 6; ++cnt)
  42      {
  43        unsigned int number;
  44
  45        if (cnt < 5)
  46          INT_FIELD (number, ISCOLON , 0, 16, (unsigned int))
  47        else
  48          INT_FIELD (number, isspace, 0, 16, (unsigned int))
  49
  50        if (number > 0xff)
  51          return 0;
  52        result->e_addr.ether_addr_octet[cnt] = number;
  53      }
  54  };
  55  STRING_FIELD (result->e_name, isspace, 1);
  56  )
  57
  58
  59 #include GENERIC
  60
  61 DB_LOOKUP (hostton, 1 + strlen (name), (".%s", name),
  62            {
  63              if (strcmp (result->e_name, name) == 0)
  64                break;
  65            }, const char *name)
  66
  67 DB_LOOKUP (ntohost, 18, ("=%x:%x:%x:%x:%x:%x",
  68                          addr->ether_addr_octet[0], addr->ether_addr_octet[1],
  69                          addr->ether_addr_octet[2], addr->ether_addr_octet[3],
  70                          addr->ether_addr_octet[4], addr->ether_addr_octet[5]),
  71            {
  72              if (memcmp (&result->e_addr, addr,
  73                          sizeof (struct ether_addr)) == 0)
  74                break;
  75            }, struct ether_addr *addr)