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 lp_set_cmdline("log level", "0");
54 setup_logging("nss_wins",False
);
55 lp_load_global_no_reinit(get_dyn_CONFIGFILE());
59 static struct in_addr
*lookup_byname_backend(const char *name
, int *count
)
62 struct sockaddr_storage
*address
= NULL
;
63 struct in_addr
*ret
= NULL
;
75 nbt_len
= strlen(name
);
76 if (nbt_len
> MAX_NETBIOSNAME_LEN
- 1) {
79 p
= strchr(name
, '.');
84 frame
= talloc_stackframe();
85 /* always try with wins first */
86 status
= resolve_wins(name
, 0x00, talloc_tos(),
88 if (NT_STATUS_IS_OK(status
)) {
89 if ( (ret
= SMB_MALLOC_P(struct in_addr
)) == NULL
) {
93 if (address
[0].ss_family
!= AF_INET
) {
98 *ret
= ((struct sockaddr_in
*)(void *)address
)
104 /* uggh, we have to broadcast to each interface in turn */
105 for (j
=iface_count() - 1;j
>= 0;j
--) {
106 const struct in_addr
*bcast
= iface_n_bcast_v4(j
);
107 struct sockaddr_storage ss
;
108 struct sockaddr_storage
*pss
;
113 in_addr_to_sockaddr_storage(&ss
, *bcast
);
114 status
= name_query(name
, 0x00, True
, True
, &ss
,
115 talloc_tos(), &pss
, count
, NULL
);
116 if (NT_STATUS_IS_OK(status
) && (*count
> 0)) {
117 if ((ret
= SMB_MALLOC_P(struct in_addr
)) == NULL
) {
121 *ret
= ((struct sockaddr_in
*)pss
)->sin_addr
;
131 static struct node_status
*lookup_byaddr_backend(char *addr
, int *count
)
133 struct sockaddr_storage ss
;
134 struct nmb_name nname
;
135 struct node_status
*result
;
142 make_nmb_name(&nname
, "*", 0);
143 if (!interpret_string_addr(&ss
, addr
, AI_NUMERICHOST
)) {
146 status
= node_status_query(NULL
, &nname
, &ss
, &result
, count
, NULL
);
147 if (!NT_STATUS_IS_OK(status
)) {
158 nsd_logprintf(NSD_LOG_MIN
, "entering init (wins)\n");
163 int lookup(nsd_file_t
*rq
)
168 struct in_addr
*ip_list
;
169 struct node_status
*status
;
170 int i
, count
, len
, size
;
174 nsd_logprintf(NSD_LOG_MIN
, "entering lookup (wins)\n");
178 map
= nsd_attr_fetch_string(rq
->f_attrs
, "table", (char*)0);
180 rq
->f_status
= NS_FATAL
;
184 key
= nsd_attr_fetch_string(rq
->f_attrs
, "key", (char*)0);
185 if (! key
|| ! *key
) {
186 rq
->f_status
= NS_FATAL
;
191 len
= sizeof(response
) - 2;
194 * response needs to be a string of the following format
195 * ip_address[ ip_address]*\tname[ alias]*
197 if (strcasecmp_m(map
,"hosts.byaddr") == 0) {
198 if ( status
= lookup_byaddr_backend(key
, &count
)) {
199 size
= strlen(key
) + 1;
205 strncat(response
,key
,size
);
206 strncat(response
,"\t",1);
207 for (i
= 0; i
< count
; i
++) {
208 /* ignore group names */
209 if (status
[i
].flags
& 0x80) continue;
210 if (status
[i
].type
== 0x20) {
211 size
= sizeof(status
[i
].name
) + 1;
217 strncat(response
, status
[i
].name
, size
);
218 strncat(response
, " ", 1);
222 response
[strlen(response
)-1] = '\n';
225 } else if (strcasecmp_m(map
,"hosts.byname") == 0) {
226 if (ip_list
= lookup_byname_backend(key
, &count
)) {
227 for (i
= count
; i
; i
--) {
228 addr
= inet_ntoa(ip_list
[i
-1]);
229 size
= strlen(addr
) + 1;
236 response
[strlen(response
)-1] = ' ';
237 strncat(response
,addr
,size
);
238 strncat(response
,"\t",1);
240 size
= strlen(key
) + 1;
245 strncat(response
,key
,size
);
246 strncat(response
,"\n",1);
253 nsd_logprintf(NSD_LOG_LOW
, "lookup (wins %s) %s\n",map
,response
);
254 nsd_set_result(rq
,NS_SUCCESS
,response
,strlen(response
),VOLATILE
);
257 nsd_logprintf(NSD_LOG_LOW
, "lookup (wins) not found\n");
258 rq
->f_status
= NS_NOTFOUND
;
264 /* Allocate some space from the nss static buffer. The buffer and buflen
265 are the pointers passed in by the C library to the _nss_*_*
268 static char *get_static(char **buffer
, size_t *buflen
, int len
)
272 /* Error check. We return false if things aren't set up right, or
273 there isn't enough buffer space left. */
275 if ((buffer
== NULL
) || (buflen
== NULL
) || (*buflen
< len
)) {
279 /* Return an index into the static buffer */
288 /****************************************************************************
289 gethostbyname() - we ignore any domain portion of the name and only
290 handle names that are at most 15 characters long
291 **************************************************************************/
293 _nss_wins_gethostbyname_r(const char *hostname
, struct hostent
*he
,
294 char *buffer
, size_t buflen
, int *h_errnop
)
296 NSS_STATUS nss_status
= NSS_STATUS_SUCCESS
;
297 struct in_addr
*ip_list
;
304 pthread_mutex_lock(&wins_nss_mutex
);
307 frame
= talloc_stackframe();
309 memset(he
, '\0', sizeof(*he
));
310 fstrcpy(name
, hostname
);
314 ip_list
= lookup_byname_backend(name
, &count
);
317 nss_status
= NSS_STATUS_NOTFOUND
;
323 namelen
= strlen(name
) + 1;
325 if ((he
->h_name
= get_static(&buffer
, &buflen
, namelen
)) == NULL
) {
327 nss_status
= NSS_STATUS_TRYAGAIN
;
331 memcpy(he
->h_name
, name
, namelen
);
333 /* Copy h_addr_list, align to pointer boundary first */
335 if ((i
= (unsigned long)(buffer
) % sizeof(char*)) != 0)
336 i
= sizeof(char*) - i
;
338 if (get_static(&buffer
, &buflen
, i
) == NULL
) {
340 nss_status
= NSS_STATUS_TRYAGAIN
;
344 if ((he
->h_addr_list
= (char **)get_static(
345 &buffer
, &buflen
, (count
+ 1) * sizeof(char *))) == NULL
) {
347 nss_status
= NSS_STATUS_TRYAGAIN
;
351 for (i
= 0; i
< count
; i
++) {
352 if ((he
->h_addr_list
[i
] = get_static(&buffer
, &buflen
,
353 INADDRSZ
)) == NULL
) {
355 nss_status
= NSS_STATUS_TRYAGAIN
;
358 memcpy(he
->h_addr_list
[i
], &ip_list
[i
], INADDRSZ
);
361 he
->h_addr_list
[count
] = NULL
;
365 /* Set h_addr_type and h_length */
367 he
->h_addrtype
= AF_INET
;
368 he
->h_length
= INADDRSZ
;
372 if ((i
= (unsigned long)(buffer
) % sizeof(char*)) != 0)
373 i
= sizeof(char*) - i
;
375 if (get_static(&buffer
, &buflen
, i
) == NULL
) {
376 nss_status
= NSS_STATUS_TRYAGAIN
;
380 if ((he
->h_aliases
= (char **)get_static(
381 &buffer
, &buflen
, sizeof(char *))) == NULL
) {
382 nss_status
= NSS_STATUS_TRYAGAIN
;
386 he
->h_aliases
[0] = NULL
;
388 nss_status
= NSS_STATUS_SUCCESS
;
395 pthread_mutex_unlock(&wins_nss_mutex
);
402 _nss_wins_gethostbyname2_r(const char *name
, int af
, struct hostent
*he
,
403 char *buffer
, size_t buflen
, int *h_errnop
)
405 NSS_STATUS nss_status
;
409 nss_status
= NSS_STATUS_UNAVAIL
;
411 nss_status
= _nss_wins_gethostbyname_r(
412 name
, he
, buffer
, buflen
, h_errnop
);