nss/nss_files/files-network.c

   1 /* Networks file parser in nss_files module.
   2    Copyright (C) 1996-1998, 2000, 2001, 2009, 2011 Free Software Foundation, Inc.
   3    This file is part of the GNU C Library.
   4
   5    The GNU C Library is free software; you can redistribute it and/or
   6    modify it under the terms of the GNU Lesser General Public
   7    License as published by the Free Software Foundation; either
   8    version 2.1 of the License, or (at your option) any later version.
   9
  10    The GNU C Library is distributed in the hope that it will be useful,
  11    but WITHOUT ANY WARRANTY; without even the implied warranty of
  12    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13    Lesser General Public License for more details.
  14
  15    You should have received a copy of the GNU Lesser General Public
  16    License along with the GNU C Library; if not, see
  17    <http://www.gnu.org/licenses/>.  */
  18
  19 #include <netinet/in.h>
  20 #include <arpa/inet.h>
  21 #include <netdb.h>
  22
  23 #define ENTNAME         netent
  24 #define DATABASE        "networks"
  25 #define NEED_H_ERRNO
  26
  27 struct netent_data {};
  28
  29 #define TRAILING_LIST_MEMBER            n_aliases
  30 #define TRAILING_LIST_SEPARATOR_P       isspace
  31 #include "files-parse.c"
  32 LINE_PARSER
  33 ("#",
  34  {
  35    char *addr;
  36    char *cp;
  37    int n = 1;
  38
  39    STRING_FIELD (result->n_name, isspace, 1);
  40
  41    STRING_FIELD (addr, isspace, 1);
  42    /* 'inet_network' does not add zeroes at the end if the network number
  43       does not four byte values.  We add them outselves if necessary.  */
  44    cp = strchr (addr, '.');
  45    if (cp != NULL)
  46      {
  47        ++n;
  48        cp = strchr (cp + 1, '.');
  49        if (cp != NULL)
  50          {
  51            ++n;
  52            cp = strchr (cp + 1, '.');
  53            if (cp != NULL)
  54              ++n;
  55          }
  56      }
  57    if (n < 4)
  58      {
  59        char *newp = (char *) alloca (strlen (addr) + (4 - n) * 2 + 1);
  60        cp = stpcpy (newp, addr);
  61        do
  62          {
  63            *cp++ = '.';
  64            *cp++ = '0';
  65          }
  66        while (++n < 4);
  67        *cp = '\0';
  68        addr = newp;
  69      }
  70    result->n_net = inet_network (addr);
  71    result->n_addrtype = AF_INET;
  72
  73  })
  74
  75 #include "files-XXX.c"
  76
  77 DB_LOOKUP (netbyname, ,,,
  78            LOOKUP_NAME_CASE (n_name, n_aliases),
  79            const char *name)
  80
  81 DB_LOOKUP (netbyaddr, ,,,
  82            {
  83              if ((type == AF_UNSPEC || result->n_addrtype == type)
  84                  && result->n_net == net)
  85                /* Bingo!  */
  86                break;
  87            }, uint32_t net, int type)