112 lines
3.0 KiB
C
112 lines
3.0 KiB
C
/* Hosts file parser in nss_files module.
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Copyright (C) 1996 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Library General Public License as
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published by the Free Software Foundation; either version 2 of the
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License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Library General Public License for more details.
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You should have received a copy of the GNU Library General Public
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License along with the GNU C Library; see the file COPYING.LIB. If
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not, write to the Free Software Foundation, Inc., 675 Mass Ave,
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Cambridge, MA 02139, USA. */
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#include <netinet/in.h>
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#include <arpa/inet.h>
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#include <arpa/nameser.h>
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#include <netdb.h>
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#include <resolv.h>
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/* Get implementation for some internal functions. */
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#include "../resolv/mapv4v6addr.h"
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#include "../resolv/mapv4v6hostent.h"
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#define ENTNAME hostent
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#define DATAFILE _PATH_HOSTS
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struct hostent_data
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{
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unsigned char host_addr[16]; /* IPv4 or IPv6 address. */
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char *h_addr_ptrs[2]; /* Points to that and null terminator. */
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};
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#define TRAILING_LIST_MEMBER h_aliases
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#define TRAILING_LIST_SEPARATOR_P isspace
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#include "files-parse.c"
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LINE_PARSER
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({
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char *addr;
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STRING_FIELD (addr, isspace, 1);
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/* Parse address. */
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if ((_res.options & RES_USE_INET6)
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&& inet_pton (AF_INET6, addr, entdata->host_addr) > 0)
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{
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result->h_addrtype = AF_INET6;
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result->h_length = IN6ADDRSZ;
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}
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else if (inet_pton (AF_INET, addr, entdata->host_addr) > 0)
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{
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if (_res.options & RES_USE_INET6)
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{
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map_v4v6_address ((char *) entdata->host_addr,
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(char *) entdata->host_addr);
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result->h_addrtype = AF_INET6;
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result->h_length = IN6ADDRSZ;
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}
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else
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{
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result->h_addrtype = AF_INET;
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result->h_length = INADDRSZ;
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}
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}
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else
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/* Illegal address: ignore line. */
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return 0;
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/* Store a pointer to the addressin the expected form. */
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entdata->h_addr_ptrs[0] = entdata->host_addr;
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entdata->h_addr_ptrs[1] = NULL;
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result->h_addr_list = entdata->h_addr_ptrs;
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/* If we need the host entry in IPv6 form change it now. */
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if (_res.options & RES_USE_INET6)
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{
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char *bufptr = data->linebuffer;
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int buflen = (char *) data + datalen - bufptr;
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map_v4v6_hostent (result, &bufptr, &buflen);
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}
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STRING_FIELD (result->h_name, isspace, 1);
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})
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#include "files-XXX.c"
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DB_LOOKUP (hostbyname,
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{
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char **ap;
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if (! strcmp (name, result->h_name))
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break;
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for (ap = result->h_aliases; *ap; ++ap)
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if (! strcmp (name, *ap))
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break;
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if (*ap)
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break;
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}, const char *name)
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DB_LOOKUP (hostbyaddr,
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{
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if (result->h_addrtype == type && result->h_length == len &&
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! memcmp (addr, result->h_addr_list[0], len))
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break;
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}, const char *addr, int len, int type)
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