source4 dsdb: Allow duplicate non local objectSIDs
[Samba.git] / nsswitch / wins.c
blob19d3c5b4fccb206973773dd1dc0e11adf584ed28
1 /*
2 Unix SMB/CIFS implementation.
3 a WINS nsswitch module
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/>.
21 #include "includes.h"
22 #include "nsswitch/winbind_nss.h"
23 #include "nsswitch/libwbclient/wbclient.h"
25 #ifdef HAVE_NS_API_H
27 #include <ns_daemon.h>
28 #endif
30 #if HAVE_PTHREAD_H
31 #include <pthread.h>
32 #endif
34 #if HAVE_PTHREAD
35 static pthread_mutex_t wins_nss_mutex = PTHREAD_MUTEX_INITIALIZER;
36 #endif
38 #ifndef INADDRSZ
39 #define INADDRSZ 4
40 #endif
42 NSS_STATUS _nss_wins_gethostbyname_r(const char *hostname,
43 struct hostent *he,
44 char *buffer,
45 size_t buflen,
46 int *errnop,
47 int *h_errnop);
48 NSS_STATUS _nss_wins_gethostbyname2_r(const char *name,
49 int af,
50 struct hostent *he,
51 char *buffer,
52 size_t buflen,
53 int *errnop,
54 int *h_errnop);
56 static char *lookup_byname_backend(const char *name)
58 const char *p;
59 char *ip, *ipp;
60 size_t nbt_len;
61 wbcErr result;
63 nbt_len = strlen(name);
64 if (nbt_len > MAX_NETBIOSNAME_LEN - 1) {
65 return NULL;
67 p = strchr(name, '.');
68 if (p != NULL) {
69 return NULL;
72 result = wbcResolveWinsByName(name, &ip);
73 if (result != WBC_ERR_SUCCESS) {
74 return NULL;
77 ipp = strchr(ip, '\t');
78 if (ipp != NULL) {
79 *ipp = '\0';
82 return ip;
85 #ifdef HAVE_NS_API_H
87 static char *lookup_byaddr_backend(const char *ip)
89 wbcErr result;
90 char *name = NULL;
92 result = wbcResolveWinsByIP(ip, &name);
93 if (result != WBC_ERR_SUCCESS) {
94 return NULL;
97 return name;
100 /* IRIX version */
102 int init(void)
104 bool ok;
106 nsd_logprintf(NSD_LOG_MIN, "entering init (wins)\n");
108 ok = nss_wins_init();
109 if (!ok) {
110 return NSD_ERROR;
113 return NSD_OK;
116 int lookup(nsd_file_t *rq)
118 char *map;
119 char *key;
120 char *addr;
121 int i, count, len, size;
122 char response[1024];
123 bool found = False;
125 nsd_logprintf(NSD_LOG_MIN, "entering lookup (wins)\n");
126 if (! rq)
127 return NSD_ERROR;
129 map = nsd_attr_fetch_string(rq->f_attrs, "table", (char*)0);
130 if (! map) {
131 rq->f_status = NS_FATAL;
132 return NSD_ERROR;
135 key = nsd_attr_fetch_string(rq->f_attrs, "key", (char*)0);
136 if (! key || ! *key) {
137 rq->f_status = NS_FATAL;
138 return NSD_ERROR;
141 response[0] = '\0';
142 len = sizeof(response) - 2;
145 * response needs to be a string of the following format
146 * ip_address[ ip_address]*\tname[ alias]*
148 if (strcasecmp_m(map,"hosts.byaddr") == 0) {
149 char *name;
151 name = lookup_byaddr_backend(key);
152 if (name != NULL) {
153 size = strlen(key) + 1;
154 if (size > len) {
155 return NSD_ERROR;
157 len -= size;
158 strncat(response,key,size);
159 strncat(response,"\t",1);
161 size = strlen(name) + 1;
162 if (size > len) {
163 return NSD_ERROR;
165 len -= size;
166 strncat(response, name, size);
167 strncat(response, " ", 1);
168 found = True;
170 response[strlen(response)-1] = '\n';
171 } else if (strcasecmp_m(map,"hosts.byname") == 0) {
172 char *ip;
174 ip = lookup_byname_backend(key);
175 if (ip != NULL) {
176 size = strlen(ip) + 1;
177 if (size > len) {
178 wbcFreeMemory(ip);
179 return NSD_ERROR;
181 len -= size;
182 strncat(response,ip,size);
183 strncat(response,"\t",1);
184 size = strlen(key) + 1;
185 wbcFreeMemory(ip);
186 if (size > len) {
187 return NSD_ERROR;
189 strncat(response,key,size);
190 strncat(response,"\n",1);
192 found = True;
196 if (found) {
197 nsd_logprintf(NSD_LOG_LOW, "lookup (wins %s) %s\n",map,response);
198 nsd_set_result(rq,NS_SUCCESS,response,strlen(response),VOLATILE);
199 return NSD_OK;
201 nsd_logprintf(NSD_LOG_LOW, "lookup (wins) not found\n");
202 rq->f_status = NS_NOTFOUND;
203 return NSD_NEXT;
206 #else
208 /* Allocate some space from the nss static buffer. The buffer and buflen
209 are the pointers passed in by the C library to the _nss_*_*
210 functions. */
212 static char *get_static(char **buffer, size_t *buflen, size_t len)
214 char *result;
216 /* Error check. We return false if things aren't set up right, or
217 there isn't enough buffer space left. */
219 if ((buffer == NULL) || (buflen == NULL) || (*buflen < len)) {
220 return NULL;
223 /* Return an index into the static buffer */
225 result = *buffer;
226 *buffer += len;
227 *buflen -= len;
229 return result;
232 /****************************************************************************
233 gethostbyname() - we ignore any domain portion of the name and only
234 handle names that are at most 15 characters long
235 **************************************************************************/
236 NSS_STATUS
237 _nss_wins_gethostbyname_r(const char *hostname,
238 struct hostent *he,
239 char *buffer,
240 size_t buflen,
241 int *errnop,
242 int *h_errnop)
244 NSS_STATUS nss_status = NSS_STATUS_SUCCESS;
245 char *ip;
246 struct in_addr in;
247 int i;
248 fstring name;
249 size_t namelen;
250 int rc;
252 #if HAVE_PTHREAD
253 pthread_mutex_lock(&wins_nss_mutex);
254 #endif
256 memset(he, '\0', sizeof(*he));
257 fstrcpy(name, hostname);
259 /* Do lookup */
261 ip = lookup_byname_backend(name);
262 if (ip == NULL) {
263 *h_errnop = HOST_NOT_FOUND;
264 nss_status = NSS_STATUS_NOTFOUND;
265 goto out;
268 rc = inet_pton(AF_INET, ip, &in);
269 wbcFreeMemory(ip);
270 if (rc == 0) {
271 *errnop = errno;
272 *h_errnop = NETDB_INTERNAL;
273 nss_status = NSS_STATUS_TRYAGAIN;
274 goto out;
277 /* Copy h_name */
279 namelen = strlen(name) + 1;
281 if ((he->h_name = get_static(&buffer, &buflen, namelen)) == NULL) {
282 *errnop = EAGAIN;
283 *h_errnop = NETDB_INTERNAL;
284 nss_status = NSS_STATUS_TRYAGAIN;
285 goto out;
288 memcpy(he->h_name, name, namelen);
290 /* Copy h_addr_list, align to pointer boundary first */
292 if ((i = (unsigned long)(buffer) % sizeof(char*)) != 0)
293 i = sizeof(char*) - i;
295 if (get_static(&buffer, &buflen, i) == NULL) {
296 *errnop = EAGAIN;
297 *h_errnop = NETDB_INTERNAL;
298 nss_status = NSS_STATUS_TRYAGAIN;
299 goto out;
302 if ((he->h_addr_list = (char **)get_static(
303 &buffer, &buflen, 2 * sizeof(char *))) == NULL) {
304 *errnop = EAGAIN;
305 *h_errnop = NETDB_INTERNAL;
306 nss_status = NSS_STATUS_TRYAGAIN;
307 goto out;
310 if ((he->h_addr_list[0] = get_static(&buffer, &buflen,
311 INADDRSZ)) == NULL) {
312 *errnop = EAGAIN;
313 *h_errnop = NETDB_INTERNAL;
314 nss_status = NSS_STATUS_TRYAGAIN;
315 goto out;
318 memcpy(he->h_addr_list[0], &in, INADDRSZ);
320 he->h_addr_list[1] = NULL;
322 /* Set h_addr_type and h_length */
324 he->h_addrtype = AF_INET;
325 he->h_length = INADDRSZ;
327 /* Set h_aliases */
329 if ((i = (unsigned long)(buffer) % sizeof(char*)) != 0)
330 i = sizeof(char*) - i;
332 if (get_static(&buffer, &buflen, i) == NULL) {
333 *errnop = EAGAIN;
334 *h_errnop = NETDB_INTERNAL;
335 nss_status = NSS_STATUS_TRYAGAIN;
336 goto out;
339 if ((he->h_aliases = (char **)get_static(
340 &buffer, &buflen, sizeof(char *))) == NULL) {
341 *errnop = EAGAIN;
342 *h_errnop = NETDB_INTERNAL;
343 nss_status = NSS_STATUS_TRYAGAIN;
344 goto out;
347 he->h_aliases[0] = NULL;
349 *h_errnop = NETDB_SUCCESS;
350 nss_status = NSS_STATUS_SUCCESS;
352 out:
354 #if HAVE_PTHREAD
355 pthread_mutex_unlock(&wins_nss_mutex);
356 #endif
357 return nss_status;
361 NSS_STATUS
362 _nss_wins_gethostbyname2_r(const char *name,
363 int af,
364 struct hostent *he,
365 char *buffer,
366 size_t buflen,
367 int *errnop,
368 int *h_errnop)
370 NSS_STATUS nss_status;
372 if(af!=AF_INET) {
373 *errnop = EAFNOSUPPORT;
374 *h_errnop = NO_DATA;
375 nss_status = NSS_STATUS_UNAVAIL;
376 } else {
377 nss_status = _nss_wins_gethostbyname_r(name,
379 buffer,
380 buflen,
381 errnop,
382 h_errnop);
384 return nss_status;
386 #endif