nss/nss_files/files-ethers.c

   1 /* Copyright (C) 1996 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
  16 not, 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 DATAFILE        "/etc/ethers"
  34 #include "files-parse.c"
  35 LINE_PARSER
  36 (
  37  MIDLINE_COMMENTS;
  38  /* Read the ethernet address: 6 x 8bit hexadecimal number.  */
  39  {
  40    size_t cnt;
  41
  42    for (cnt = 0; cnt < 6; ++cnt)
  43      {
  44        unsigned int number;
  45
  46        if (cnt < 5)
  47          INT_FIELD (number, ISCOLON , 0, 16, (unsigned int))
  48        else
  49          INT_FIELD (number, isspace, 0, 16, (unsigned int))
  50
  51        if (number > 0xff)
  52          return 0;
  53        result->e_addr.ether_addr_octet[cnt] = number;
  54      }
  55  };
  56  STRING_FIELD (result->e_name, isspace, 1);
  57  )
  58
  59
  60 #include "files-XXX.c"
  61
  62 DB_LOOKUP (hostton,
  63            {
  64              if (strcmp (result->e_name, name) == 0)
  65                break;
  66            }, const char *name)
  67
  68 DB_LOOKUP (ntohost,
  69            {
  70              if (memcmp (&result->e_addr, addr,
  71                          sizeof (struct ether_addr)) == 0)
  72                break;
  73            }, struct ether_addr *addr)