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git.ipfire.org Git - thirdparty/glibc.git/blob - nis/nss_nis/nis-hosts.c
1 /* Copyright (C) 1996 Free Software Foundation, Inc.
2 This file is part of the GNU C Library.
3 Contributed by Thorsten Kukuk <kukuk@vt.uni-paderborn.de>, 1996.
5 The GNU C Library is free software; you can redistribute it and/or
6 modify it under the terms of the GNU Library General Public License as
7 published by the Free Software Foundation; either version 2 of the
8 License, or (at your option) any later version.
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 Library General Public License for more details.
15 You should have received a copy of the GNU Library General Public
16 License along with the GNU C Library; see the file COPYING.LIB. If not,
17 write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
18 Boston, MA 02111-1307, USA. */
24 #include <netinet/in.h>
25 #include <arpa/inet.h>
27 #include <libc-lock.h>
28 #include <rpcsvc/yp.h>
29 #include <rpcsvc/ypclnt.h>
33 /* Get implementation for some internal functions. */
34 #include "../../resolv/mapv4v6addr.h"
35 #include "../../resolv/mapv4v6hostent.h"
37 #define ENTNAME hostent
38 #define DATABASE "hosts"
41 #define ENTDATA hostent_data
44 unsigned char host_addr
[16]; /* IPv4 or IPv6 address. */
45 char *h_addr_ptrs
[2]; /* Points to that and null terminator. */
48 #define TRAILING_LIST_MEMBER h_aliases
49 #define TRAILING_LIST_SEPARATOR_P isspace
50 #include "../../nss/nss_files/files-parse.c"
56 STRING_FIELD (addr
, isspace
, 1);
59 if ((_res
.options
& RES_USE_INET6
)
60 && inet_pton (AF_INET6
, addr
, entdata
->host_addr
) > 0)
62 result
->h_addrtype
= AF_INET6
;
63 result
->h_length
= IN6ADDRSZ
;
66 if (inet_pton (AF_INET
, addr
, entdata
->host_addr
) > 0)
68 if (_res
.options
& RES_USE_INET6
)
70 map_v4v6_address ((char *) entdata
->host_addr
,
71 (char *) entdata
->host_addr
);
72 result
->h_addrtype
= AF_INET6
;
73 result
->h_length
= IN6ADDRSZ
;
77 result
->h_addrtype
= AF_INET
;
78 result
->h_length
= INADDRSZ
;
82 /* Illegal address: ignore line. */
85 /* Store a pointer to the address in the expected form. */
86 entdata
->h_addr_ptrs
[0] = entdata
->host_addr
;
87 entdata
->h_addr_ptrs
[1] = NULL
;
88 result
->h_addr_list
= entdata
->h_addr_ptrs
;
90 /* If we need the host entry in IPv6 form change it now. */
91 if (_res
.options
& RES_USE_INET6
)
93 char *bufptr
= data
->linebuffer
;
94 size_t buflen
= (char *) data
+ datalen
- bufptr
;
95 map_v4v6_hostent (result
, &bufptr
, &buflen
);
98 STRING_FIELD (result
->h_name
, isspace
, 1);
102 __libc_lock_define_initialized (static, lock
)
104 static bool_t new_start
= 1;
105 static char *oldkey
= NULL
;
106 static int oldkeylen
= 0;
109 _nss_nis_sethostent (void)
111 __libc_lock_lock (lock
);
121 __libc_lock_unlock (lock
);
123 return NSS_STATUS_SUCCESS
;
127 _nss_nis_endhostent (void)
129 __libc_lock_lock (lock
);
139 __libc_lock_unlock (lock
);
141 return NSS_STATUS_SUCCESS
;
144 static enum nss_status
145 internal_nis_gethostent_r (struct hostent
*host
, char *buffer
,
146 size_t buflen
, int *h_errnop
)
153 struct parser_data
*data
= (void *) buffer
;
154 size_t linebuflen
= buffer
+ buflen
- data
->linebuffer
;
156 if (yp_get_default_domain (&domain
))
157 return NSS_STATUS_UNAVAIL
;
159 if (buflen
< sizeof *data
+ 1)
161 __set_errno (ERANGE
);
162 *h_errnop
= NETDB_INTERNAL
;
163 return NSS_STATUS_TRYAGAIN
;
166 /* Get the next entry until we found a correct one. */
169 enum nss_status retval
;
173 retval
= yperr2nss (yp_first (domain
, "hosts.byname",
174 &outkey
, &keylen
, &result
, &len
));
176 retval
= yperr2nss ( yp_next (domain
, "hosts.byname",
178 &outkey
, &keylen
, &result
, &len
));
180 if (retval
!= NSS_STATUS_SUCCESS
)
184 case NSS_STATUS_TRYAGAIN
:
185 __set_errno (EAGAIN
);
186 *h_errnop
= TRY_AGAIN
;
188 case NSS_STATUS_NOTFOUND
:
189 *h_errnop
= HOST_NOT_FOUND
;
192 *h_errnop
= NO_RECOVERY
;
198 if ((size_t) (len
+ 1) > linebuflen
)
201 *h_errnop
= NETDB_INTERNAL
;
202 __set_errno (ERANGE
);
203 return NSS_STATUS_TRYAGAIN
;
206 p
= strncpy (data
->linebuffer
, result
, len
);
207 data
->linebuffer
[len
] = '\0';
212 parse_res
= parse_line (p
, host
, data
, buflen
);
213 if (!parse_res
&& errno
== ERANGE
)
215 *h_errnop
= NETDB_INTERNAL
;;
216 return NSS_STATUS_TRYAGAIN
;
225 *h_errnop
= NETDB_SUCCESS
;
226 return NSS_STATUS_SUCCESS
;
230 _nss_nis_gethostent_r (struct hostent
*host
, char *buffer
, size_t buflen
,
235 __libc_lock_lock (lock
);
237 status
= internal_nis_gethostent_r (host
, buffer
, buflen
, h_errnop
);
239 __libc_lock_unlock (lock
);
245 _nss_nis_gethostbyname_r (const char *name
, struct hostent
*host
,
246 char *buffer
, size_t buflen
, int *h_errnop
)
248 enum nss_status retval
;
249 char *domain
, *result
, *p
;
251 struct parser_data
*data
= (void *) buffer
;
252 size_t linebuflen
= buffer
+ buflen
- data
->linebuffer
;
256 __set_errno (EINVAL
);
257 return NSS_STATUS_UNAVAIL
;
260 if (yp_get_default_domain (&domain
))
261 return NSS_STATUS_UNAVAIL
;
263 if (buflen
< sizeof *data
+ 1)
265 *h_errnop
= NETDB_INTERNAL
;
266 __set_errno (ERANGE
);
267 return NSS_STATUS_TRYAGAIN
;
269 retval
= yperr2nss (yp_match (domain
, "hosts.byname", name
,
270 strlen (name
), &result
, &len
));
272 if (retval
!= NSS_STATUS_SUCCESS
)
274 if (retval
== NSS_STATUS_TRYAGAIN
)
276 *h_errnop
= TRY_AGAIN
;
277 __set_errno (EAGAIN
);
279 if (retval
== NSS_STATUS_NOTFOUND
)
280 *h_errnop
= HOST_NOT_FOUND
;
284 if ((size_t) (len
+ 1) > linebuflen
)
287 *h_errnop
= NETDB_INTERNAL
;
288 __set_errno (ERANGE
);
289 return NSS_STATUS_TRYAGAIN
;
292 p
= strncpy (data
->linebuffer
, result
, len
);
293 data
->linebuffer
[len
] = '\0';
298 parse_res
= parse_line (p
, host
, data
, buflen
);
304 *h_errnop
= NETDB_INTERNAL
;
305 return NSS_STATUS_TRYAGAIN
;
309 *h_errnop
= HOST_NOT_FOUND
;
310 return NSS_STATUS_NOTFOUND
;
314 *h_errnop
= NETDB_SUCCESS
;
315 return NSS_STATUS_SUCCESS
;
319 _nss_nis_gethostbyaddr_r (char *addr
, int addrlen
, int type
,
320 struct hostent
*host
, char *buffer
, size_t buflen
,
323 enum nss_status retval
;
324 char *domain
, *result
, *p
;
327 struct parser_data
*data
= (void *) buffer
;
328 size_t linebuflen
= buffer
+ buflen
- data
->linebuffer
;
330 if (yp_get_default_domain (&domain
))
331 return NSS_STATUS_UNAVAIL
;
333 if (buflen
< sizeof *data
+ 1)
335 __set_errno (ERANGE
);
336 *h_errnop
= NETDB_INTERNAL
;
337 return NSS_STATUS_TRYAGAIN
;
340 buf
= inet_ntoa (*(struct in_addr
*) addr
);
342 retval
= yperr2nss (yp_match (domain
, "hosts.byaddr", buf
,
343 strlen (buf
), &result
, &len
));
345 if (retval
!= NSS_STATUS_SUCCESS
)
347 if (retval
== NSS_STATUS_TRYAGAIN
)
349 *h_errnop
= TRY_AGAIN
;
350 __set_errno (EAGAIN
);
352 if (retval
== NSS_STATUS_NOTFOUND
)
353 *h_errnop
= HOST_NOT_FOUND
;
357 if ((size_t) (len
+ 1) > linebuflen
)
360 __set_errno (ERANGE
);
361 *h_errnop
= NETDB_INTERNAL
;
362 return NSS_STATUS_TRYAGAIN
;
365 p
= strncpy (data
->linebuffer
, result
, len
);
366 data
->linebuffer
[len
] = '\0';
371 parse_res
= parse_line (p
, host
, data
, buflen
);
377 *h_errnop
= NETDB_INTERNAL
;
378 return NSS_STATUS_TRYAGAIN
;
382 *h_errnop
= HOST_NOT_FOUND
;
383 return NSS_STATUS_NOTFOUND
;
387 *h_errnop
= NETDB_SUCCESS
;
388 return NSS_STATUS_SUCCESS
;