source: vendor/3.6.0/source3/libads/ldap_utils.c

Last change on this file was 740, checked in by Silvan Scherrer, 13 years ago

Samba Server: update vendor to 3.6.0
File size: 9.6 KB
Line 
1/*
2 Unix SMB/CIFS implementation.
3
4 Some Helpful wrappers on LDAP
5
6 Copyright (C) Andrew Tridgell 2001
7 Copyright (C) Guenther Deschner 2006,2007
8
9 This program is free software; you can redistribute it and/or modify
10 it under the terms of the GNU General Public License as published by
11 the Free Software Foundation; either version 3 of the License, or
12 (at your option) any later version.
13
14 This program is distributed in the hope that it will be useful,
15 but WITHOUT ANY WARRANTY; without even the implied warranty of
16 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 GNU General Public License for more details.
18
19 You should have received a copy of the GNU General Public License
20 along with this program. If not, see <http://www.gnu.org/licenses/>.
21*/
22
23#include "includes.h"
24#include "ads.h"
25
26#ifdef HAVE_LDAP
27
28static ADS_STATUS ads_ranged_search_internal(ADS_STRUCT *ads,
29 TALLOC_CTX *mem_ctx,
30 int scope,
31 const char *base,
32 const char *filter,
33 const char **attrs,
34 void *args,
35 const char *range_attr,
36 char ***strings,
37 size_t *num_strings,
38 uint32 *first_usn,
39 int *num_retries,
40 bool *more_values);
41
42/*
43 a wrapper around ldap_search_s that retries depending on the error code
44 this is supposed to catch dropped connections and auto-reconnect
45*/
46static ADS_STATUS ads_do_search_retry_internal(ADS_STRUCT *ads, const char *bind_path, int scope,
47 const char *expr,
48 const char **attrs, void *args,
49 LDAPMessage **res)
50{
51 ADS_STATUS status = ADS_SUCCESS;
52 int count = 3;
53 char *bp;
54
55 *res = NULL;
56
57 if (!ads->ldap.ld &&
58 time_mono(NULL) - ads->ldap.last_attempt < ADS_RECONNECT_TIME) {
59 return ADS_ERROR(LDAP_SERVER_DOWN);
60 }
61
62 bp = SMB_STRDUP(bind_path);
63
64 if (!bp) {
65 return ADS_ERROR(LDAP_NO_MEMORY);
66 }
67
68 *res = NULL;
69
70 /* when binding anonymously, we cannot use the paged search LDAP
71 * control - Guenther */
72
73 if (ads->auth.flags & ADS_AUTH_ANON_BIND) {
74 status = ads_do_search(ads, bp, scope, expr, attrs, res);
75 } else {
76 status = ads_do_search_all_args(ads, bp, scope, expr, attrs, args, res);
77 }
78 if (ADS_ERR_OK(status)) {
79 DEBUG(5,("Search for %s in <%s> gave %d replies\n",
80 expr, bp, ads_count_replies(ads, *res)));
81 SAFE_FREE(bp);
82 return status;
83 }
84
85 while (--count) {
86
87 if (*res)
88 ads_msgfree(ads, *res);
89 *res = NULL;
90
91 DEBUG(3,("Reopening ads connection to realm '%s' after error %s\n",
92 ads->config.realm, ads_errstr(status)));
93
94 ads_disconnect(ads);
95 status = ads_connect(ads);
96
97 if (!ADS_ERR_OK(status)) {
98 DEBUG(1,("ads_search_retry: failed to reconnect (%s)\n",
99 ads_errstr(status)));
100 ads_destroy(&ads);
101 SAFE_FREE(bp);
102 return status;
103 }
104
105 *res = NULL;
106
107 /* when binding anonymously, we cannot use the paged search LDAP
108 * control - Guenther */
109
110 if (ads->auth.flags & ADS_AUTH_ANON_BIND) {
111 status = ads_do_search(ads, bp, scope, expr, attrs, res);
112 } else {
113 status = ads_do_search_all_args(ads, bp, scope, expr, attrs, args, res);
114 }
115
116 if (ADS_ERR_OK(status)) {
117 DEBUG(5,("Search for filter: %s, base: %s gave %d replies\n",
118 expr, bp, ads_count_replies(ads, *res)));
119 SAFE_FREE(bp);
120 return status;
121 }
122 }
123 SAFE_FREE(bp);
124
125 if (!ADS_ERR_OK(status)) {
126 DEBUG(1,("ads reopen failed after error %s\n",
127 ads_errstr(status)));
128 }
129 return status;
130}
131
132 ADS_STATUS ads_do_search_retry(ADS_STRUCT *ads, const char *bind_path,
133 int scope, const char *expr,
134 const char **attrs, LDAPMessage **res)
135{
136 return ads_do_search_retry_internal(ads, bind_path, scope, expr, attrs, NULL, res);
137}
138
139static ADS_STATUS ads_do_search_retry_args(ADS_STRUCT *ads, const char *bind_path,
140 int scope, const char *expr,
141 const char **attrs, void *args,
142 LDAPMessage **res)
143{
144 return ads_do_search_retry_internal(ads, bind_path, scope, expr, attrs, args, res);
145}
146
147
148 ADS_STATUS ads_search_retry(ADS_STRUCT *ads, LDAPMessage **res,
149 const char *expr, const char **attrs)
150{
151 return ads_do_search_retry(ads, ads->config.bind_path, LDAP_SCOPE_SUBTREE,
152 expr, attrs, res);
153}
154
155 ADS_STATUS ads_search_retry_dn(ADS_STRUCT *ads, LDAPMessage **res,
156 const char *dn,
157 const char **attrs)
158{
159 return ads_do_search_retry(ads, dn, LDAP_SCOPE_BASE,
160 "(objectclass=*)", attrs, res);
161}
162
163 ADS_STATUS ads_search_retry_dn_sd_flags(ADS_STRUCT *ads, LDAPMessage **res,
164 uint32 sd_flags,
165 const char *dn,
166 const char **attrs)
167{
168 ads_control args;
169
170 args.control = ADS_SD_FLAGS_OID;
171 args.val = sd_flags;
172 args.critical = True;
173
174 return ads_do_search_retry_args(ads, dn, LDAP_SCOPE_BASE,
175 "(objectclass=*)", attrs, &args, res);
176}
177
178 ADS_STATUS ads_search_retry_extended_dn_ranged(ADS_STRUCT *ads, TALLOC_CTX *mem_ctx,
179 const char *dn,
180 const char **attrs,
181 enum ads_extended_dn_flags flags,
182 char ***strings,
183 size_t *num_strings)
184{
185 ads_control args;
186
187 args.control = ADS_EXTENDED_DN_OID;
188 args.val = flags;
189 args.critical = True;
190
191 /* we can only range process one attribute */
192 if (!attrs || !attrs[0] || attrs[1]) {
193 return ADS_ERROR_NT(NT_STATUS_INVALID_PARAMETER);
194 }
195
196 return ads_ranged_search(ads, mem_ctx, LDAP_SCOPE_BASE, dn,
197 "(objectclass=*)", &args, attrs[0],
198 strings, num_strings);
199
200}
201
202 ADS_STATUS ads_search_retry_sid(ADS_STRUCT *ads, LDAPMessage **res,
203 const struct dom_sid *sid,
204 const char **attrs)
205{
206 char *dn, *sid_string;
207 ADS_STATUS status;
208
209 sid_string = sid_binstring_hex(sid);
210 if (sid_string == NULL) {
211 return ADS_ERROR(LDAP_NO_MEMORY);
212 }
213
214 if (!asprintf(&dn, "<SID=%s>", sid_string)) {
215 SAFE_FREE(sid_string);
216 return ADS_ERROR(LDAP_NO_MEMORY);
217 }
218
219 status = ads_do_search_retry(ads, dn, LDAP_SCOPE_BASE,
220 "(objectclass=*)", attrs, res);
221 SAFE_FREE(dn);
222 SAFE_FREE(sid_string);
223 return status;
224}
225
226ADS_STATUS ads_ranged_search(ADS_STRUCT *ads,
227 TALLOC_CTX *mem_ctx,
228 int scope,
229 const char *base,
230 const char *filter,
231 void *args,
232 const char *range_attr,
233 char ***strings,
234 size_t *num_strings)
235{
236 ADS_STATUS status;
237 uint32 first_usn;
238 int num_retries = 0;
239 const char **attrs;
240 bool more_values = False;
241
242 *num_strings = 0;
243 *strings = NULL;
244
245 attrs = TALLOC_ARRAY(mem_ctx, const char *, 3);
246 ADS_ERROR_HAVE_NO_MEMORY(attrs);
247
248 attrs[0] = talloc_strdup(mem_ctx, range_attr);
249 attrs[1] = talloc_strdup(mem_ctx, "usnChanged");
250 attrs[2] = NULL;
251
252 ADS_ERROR_HAVE_NO_MEMORY(attrs[0]);
253 ADS_ERROR_HAVE_NO_MEMORY(attrs[1]);
254
255 do {
256 status = ads_ranged_search_internal(ads, mem_ctx,
257 scope, base, filter,
258 attrs, args, range_attr,
259 strings, num_strings,
260 &first_usn, &num_retries,
261 &more_values);
262
263 if (NT_STATUS_EQUAL(STATUS_MORE_ENTRIES, ads_ntstatus(status))) {
264 continue;
265 }
266
267 if (!ADS_ERR_OK(status)) {
268 *num_strings = 0;
269 strings = NULL;
270 goto done;
271 }
272
273 } while (more_values);
274
275 done:
276 DEBUG(10,("returning with %d strings\n", (int)*num_strings));
277
278 return status;
279}
280
281static ADS_STATUS ads_ranged_search_internal(ADS_STRUCT *ads,
282 TALLOC_CTX *mem_ctx,
283 int scope,
284 const char *base,
285 const char *filter,
286 const char **attrs,
287 void *args,
288 const char *range_attr,
289 char ***strings,
290 size_t *num_strings,
291 uint32 *first_usn,
292 int *num_retries,
293 bool *more_values)
294{
295 LDAPMessage *res = NULL;
296 ADS_STATUS status;
297 int count;
298 uint32 current_usn;
299
300 DEBUG(10, ("Searching for attrs[0] = %s, attrs[1] = %s\n", attrs[0], attrs[1]));
301
302 *more_values = False;
303
304 status = ads_do_search_retry_internal(ads, base, scope, filter, attrs, args, &res);
305
306 if (!ADS_ERR_OK(status)) {
307 DEBUG(1,("ads_search: %s\n",
308 ads_errstr(status)));
309 return status;
310 }
311
312 if (!res) {
313 return ADS_ERROR(LDAP_NO_MEMORY);
314 }
315
316 count = ads_count_replies(ads, res);
317 if (count == 0) {
318 ads_msgfree(ads, res);
319 return ADS_ERROR(LDAP_SUCCESS);
320 }
321
322 if (*num_strings == 0) {
323 if (!ads_pull_uint32(ads, res, "usnChanged", first_usn)) {
324 DEBUG(1, ("could not pull first usnChanged!\n"));
325 ads_msgfree(ads, res);
326 return ADS_ERROR(LDAP_NO_MEMORY);
327 }
328 }
329
330 if (!ads_pull_uint32(ads, res, "usnChanged", &current_usn)) {
331 DEBUG(1, ("could not pull current usnChanged!\n"));
332 ads_msgfree(ads, res);
333 return ADS_ERROR(LDAP_NO_MEMORY);
334 }
335
336 if (*first_usn != current_usn) {
337 DEBUG(5, ("USN on this record changed"
338 " - restarting search\n"));
339 if (*num_retries < 5) {
340 (*num_retries)++;
341 *num_strings = 0;
342 ads_msgfree(ads, res);
343 return ADS_ERROR_NT(STATUS_MORE_ENTRIES);
344 } else {
345 DEBUG(5, ("USN on this record changed"
346 " - restarted search too many times, aborting!\n"));
347 ads_msgfree(ads, res);
348 return ADS_ERROR(LDAP_NO_MEMORY);
349 }
350 }
351
352 *strings = ads_pull_strings_range(ads, mem_ctx, res,
353 range_attr,
354 *strings,
355 &attrs[0],
356 num_strings,
357 more_values);
358
359 ads_msgfree(ads, res);
360
361 /* paranoia checks */
362 if (*strings == NULL && *more_values) {
363 DEBUG(0,("no strings found but more values???\n"));
364 return ADS_ERROR(LDAP_NO_MEMORY);
365 }
366 if (*num_strings == 0 && *more_values) {
367 DEBUG(0,("no strings found but more values???\n"));
368 return ADS_ERROR(LDAP_NO_MEMORY);
369 }
370
371 return (*more_values) ? ADS_ERROR_NT(STATUS_MORE_ENTRIES) : ADS_ERROR(LDAP_SUCCESS);
372}
373
374#endif
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