1  /* Networks file parser in nss_files module.
       2     Copyright (C) 1996-2023 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     <https://www.gnu.org/licenses/>.  */
      18  
      19  #include <netinet/in.h>
      20  #include <arpa/inet.h>
      21  #include <netdb.h>
      22  #include <stdint.h>
      23  #include <nss.h>
      24  
      25  #define ENTNAME		netent
      26  #define DATABASE	"networks"
      27  #define NEED_H_ERRNO
      28  
      29  struct netent_data {};
      30  
      31  #define TRAILING_LIST_MEMBER		n_aliases
      32  #define TRAILING_LIST_SEPARATOR_P	isspace
      33  #include "files-parse.c"
      34  LINE_PARSER
      35  ("#",
      36   {
      37     char *addr;
      38     char *cp;
      39     int n = 1;
      40  
      41     STRING_FIELD (result->n_name, isspace, 1);
      42  
      43     STRING_FIELD (addr, isspace, 1);
      44     /* 'inet_network' does not add zeroes at the end if the network number
      45        does not four byte values.  We add them ourselves if necessary.  */
      46     cp = strchr (addr, '.');
      47     if (cp != NULL)
      48       {
      49         ++n;
      50         cp = strchr (cp + 1, '.');
      51         if (cp != NULL)
      52  	 {
      53  	   ++n;
      54  	   cp = strchr (cp + 1, '.');
      55  	   if (cp != NULL)
      56  	     ++n;
      57  	 }
      58       }
      59     if (n < 4)
      60       {
      61         char *newp = (char *) alloca (strlen (addr) + (4 - n) * 2 + 1);
      62         cp = stpcpy (newp, addr);
      63         do
      64  	 {
      65  	   *cp++ = '.';
      66  	   *cp++ = '0';
      67  	 }
      68         while (++n < 4);
      69         *cp = '\0';
      70         addr = newp;
      71       }
      72     result->n_net = __inet_network (addr);
      73     result->n_addrtype = AF_INET;
      74  
      75   })
      76  
      77  #include "files-XXX.c"
      78  
      79  DB_LOOKUP (netbyname, ,,,
      80  	   LOOKUP_NAME_CASE (n_name, n_aliases),
      81  	   const char *name)
      82  
      83  DB_LOOKUP (netbyaddr, ,,,
      84  	   {
      85  	     if ((type == AF_UNSPEC || result->n_addrtype == type)
      86  		 && result->n_net == net)
      87  	       /* Bingo!  */
      88  	       break;
      89  	   }, uint32_t net, int type)