2 Unix SMB/CIFS implementation.
4 Copyright (C) Andrew Tridgell 1999
6 This program is free software; you can redistribute it and/or modify
7 it under the terms of the GNU General Public License as published by
8 the Free Software Foundation; either version 3 of the License, or
9 (at your option) any later version.
11 This program is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 GNU General Public License for more details.
16 You should have received a copy of the GNU General Public License
17 along with this program. If not, see <http://www.gnu.org/licenses/>.
22 #include "nsswitch/winbind_nss.h"
26 #include <ns_daemon.h>
34 static pthread_mutex_t wins_nss_mutex
= PTHREAD_MUTEX_INITIALIZER
;
41 static int initialised
;
43 NSS_STATUS
_nss_wins_gethostbyname_r(const char *hostname
, struct hostent
*he
,
44 char *buffer
, size_t buflen
, int *h_errnop
);
45 NSS_STATUS
_nss_wins_gethostbyname2_r(const char *name
, int af
, struct hostent
*he
,
46 char *buffer
, size_t buflen
, int *h_errnop
);
48 static void nss_wins_init(void)
51 load_case_tables_library();
52 lp_set_cmdline("log level", "0");
55 setup_logging("nss_wins",False
);
56 lp_load(get_dyn_CONFIGFILE(),True
,False
,False
,True
);
60 static struct in_addr
*lookup_byname_backend(const char *name
, int *count
)
62 TALLOC_CTX
*frame
= talloc_stackframe();
63 struct ip_service
*address
= NULL
;
64 struct in_addr
*ret
= NULL
;
73 /* always try with wins first */
74 if (NT_STATUS_IS_OK(resolve_wins(name
,0x00,&address
,count
))) {
75 if ( (ret
= SMB_MALLOC_P(struct in_addr
)) == NULL
) {
80 if (address
[0].ss
.ss_family
!= AF_INET
) {
86 *ret
= ((struct sockaddr_in
*)(void *)&address
[0].ss
)
93 /* uggh, we have to broadcast to each interface in turn */
94 for (j
=iface_count() - 1;j
>= 0;j
--) {
95 const struct in_addr
*bcast
= iface_n_bcast_v4(j
);
96 struct sockaddr_storage ss
;
97 struct sockaddr_storage
*pss
;
103 in_addr_to_sockaddr_storage(&ss
, *bcast
);
104 status
= name_query(name
, 0x00, True
, True
, &ss
,
105 talloc_tos(), &pss
, count
, NULL
);
106 if (NT_STATUS_IS_OK(status
) && (*count
> 0)) {
107 if ((ret
= SMB_MALLOC_P(struct in_addr
)) == NULL
) {
111 *ret
= ((struct sockaddr_in
*)pss
)->sin_addr
;
121 static struct node_status
*lookup_byaddr_backend(char *addr
, int *count
)
123 struct sockaddr_storage ss
;
124 struct nmb_name nname
;
125 struct node_status
*result
;
132 make_nmb_name(&nname
, "*", 0);
133 if (!interpret_string_addr(&ss
, addr
, AI_NUMERICHOST
)) {
136 status
= node_status_query(NULL
, &nname
, &ss
, &result
, count
, NULL
);
137 if (!NT_STATUS_IS_OK(status
)) {
148 nsd_logprintf(NSD_LOG_MIN
, "entering init (wins)\n");
153 int lookup(nsd_file_t
*rq
)
158 struct in_addr
*ip_list
;
159 struct node_status
*status
;
160 int i
, count
, len
, size
;
164 nsd_logprintf(NSD_LOG_MIN
, "entering lookup (wins)\n");
168 map
= nsd_attr_fetch_string(rq
->f_attrs
, "table", (char*)0);
170 rq
->f_status
= NS_FATAL
;
174 key
= nsd_attr_fetch_string(rq
->f_attrs
, "key", (char*)0);
175 if (! key
|| ! *key
) {
176 rq
->f_status
= NS_FATAL
;
181 len
= sizeof(response
) - 2;
184 * response needs to be a string of the following format
185 * ip_address[ ip_address]*\tname[ alias]*
187 if (strcasecmp_m(map
,"hosts.byaddr") == 0) {
188 if ( status
= lookup_byaddr_backend(key
, &count
)) {
189 size
= strlen(key
) + 1;
195 strncat(response
,key
,size
);
196 strncat(response
,"\t",1);
197 for (i
= 0; i
< count
; i
++) {
198 /* ignore group names */
199 if (status
[i
].flags
& 0x80) continue;
200 if (status
[i
].type
== 0x20) {
201 size
= sizeof(status
[i
].name
) + 1;
207 strncat(response
, status
[i
].name
, size
);
208 strncat(response
, " ", 1);
212 response
[strlen(response
)-1] = '\n';
215 } else if (strcasecmp_m(map
,"hosts.byname") == 0) {
216 if (ip_list
= lookup_byname_backend(key
, &count
)) {
217 for (i
= count
; i
; i
--) {
218 addr
= inet_ntoa(ip_list
[i
-1]);
219 size
= strlen(addr
) + 1;
226 response
[strlen(response
)-1] = ' ';
227 strncat(response
,addr
,size
);
228 strncat(response
,"\t",1);
230 size
= strlen(key
) + 1;
235 strncat(response
,key
,size
);
236 strncat(response
,"\n",1);
243 nsd_logprintf(NSD_LOG_LOW
, "lookup (wins %s) %s\n",map
,response
);
244 nsd_set_result(rq
,NS_SUCCESS
,response
,strlen(response
),VOLATILE
);
247 nsd_logprintf(NSD_LOG_LOW
, "lookup (wins) not found\n");
248 rq
->f_status
= NS_NOTFOUND
;
254 /* Allocate some space from the nss static buffer. The buffer and buflen
255 are the pointers passed in by the C library to the _nss_*_*
258 static char *get_static(char **buffer
, size_t *buflen
, int len
)
262 /* Error check. We return false if things aren't set up right, or
263 there isn't enough buffer space left. */
265 if ((buffer
== NULL
) || (buflen
== NULL
) || (*buflen
< len
)) {
269 /* Return an index into the static buffer */
278 /****************************************************************************
279 gethostbyname() - we ignore any domain portion of the name and only
280 handle names that are at most 15 characters long
281 **************************************************************************/
283 _nss_wins_gethostbyname_r(const char *hostname
, struct hostent
*he
,
284 char *buffer
, size_t buflen
, int *h_errnop
)
286 NSS_STATUS nss_status
= NSS_STATUS_SUCCESS
;
287 struct in_addr
*ip_list
;
294 pthread_mutex_lock(&wins_nss_mutex
);
297 frame
= talloc_stackframe();
299 memset(he
, '\0', sizeof(*he
));
300 fstrcpy(name
, hostname
);
304 ip_list
= lookup_byname_backend(name
, &count
);
307 nss_status
= NSS_STATUS_NOTFOUND
;
313 namelen
= strlen(name
) + 1;
315 if ((he
->h_name
= get_static(&buffer
, &buflen
, namelen
)) == NULL
) {
317 nss_status
= NSS_STATUS_TRYAGAIN
;
321 memcpy(he
->h_name
, name
, namelen
);
323 /* Copy h_addr_list, align to pointer boundary first */
325 if ((i
= (unsigned long)(buffer
) % sizeof(char*)) != 0)
326 i
= sizeof(char*) - i
;
328 if (get_static(&buffer
, &buflen
, i
) == NULL
) {
330 nss_status
= NSS_STATUS_TRYAGAIN
;
334 if ((he
->h_addr_list
= (char **)get_static(
335 &buffer
, &buflen
, (count
+ 1) * sizeof(char *))) == NULL
) {
337 nss_status
= NSS_STATUS_TRYAGAIN
;
341 for (i
= 0; i
< count
; i
++) {
342 if ((he
->h_addr_list
[i
] = get_static(&buffer
, &buflen
,
343 INADDRSZ
)) == NULL
) {
345 nss_status
= NSS_STATUS_TRYAGAIN
;
348 memcpy(he
->h_addr_list
[i
], &ip_list
[i
], INADDRSZ
);
351 he
->h_addr_list
[count
] = NULL
;
355 /* Set h_addr_type and h_length */
357 he
->h_addrtype
= AF_INET
;
358 he
->h_length
= INADDRSZ
;
362 if ((i
= (unsigned long)(buffer
) % sizeof(char*)) != 0)
363 i
= sizeof(char*) - i
;
365 if (get_static(&buffer
, &buflen
, i
) == NULL
) {
366 nss_status
= NSS_STATUS_TRYAGAIN
;
370 if ((he
->h_aliases
= (char **)get_static(
371 &buffer
, &buflen
, sizeof(char *))) == NULL
) {
372 nss_status
= NSS_STATUS_TRYAGAIN
;
376 he
->h_aliases
[0] = NULL
;
378 nss_status
= NSS_STATUS_SUCCESS
;
385 pthread_mutex_unlock(&wins_nss_mutex
);
392 _nss_wins_gethostbyname2_r(const char *name
, int af
, struct hostent
*he
,
393 char *buffer
, size_t buflen
, int *h_errnop
)
395 NSS_STATUS nss_status
;
399 nss_status
= NSS_STATUS_UNAVAIL
;
401 nss_status
= _nss_wins_gethostbyname_r(
402 name
, he
, buffer
, buflen
, h_errnop
);