summaryrefslogtreecommitdiff
path: root/source4/lib/ldb/modules/timestamps.c
blob: 1deeeb218b095108ad9690ee62478c9f77ade2e0 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
/* 
   ldb database library

   Copyright (C) Simo Sorce  2004

     ** NOTE! The following LGPL license applies to the ldb
     ** library. This does NOT imply that all of Samba is released
     ** under the LGPL
   
   This library is free software; you can redistribute it and/or
   modify it under the terms of the GNU Lesser General Public
   License as published by the Free Software Foundation; either
   version 2 of the License, or (at your option) any later version.

   This library is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
   Lesser General Public License for more details.

   You should have received a copy of the GNU Lesser General Public
   License along with this library; if not, write to the Free Software
   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
*/

/*
 *  Name: ldb
 *
 *  Component: ldb timestamps module
 *
 *  Description: add object timestamping functionality
 *
 *  Author: Simo Sorce
 */

#include "includes.h"
#include "ldb/include/ldb.h"
#include "ldb/include/ldb_private.h"
#include <time.h>

struct private_data {
	const char *error_string;
};

static int timestamps_close(struct ldb_module *module)
{
	ldb_debug(module->ldb, LDB_DEBUG_TRACE, "timestamps_close\n");
	return ldb_next_close(module);
}

static int timestamps_search(struct ldb_module *module, const char *base,
				  enum ldb_scope scope, const char *expression,
				  const char * const *attrs, struct ldb_message ***res)
{
	ldb_debug(module->ldb, LDB_DEBUG_TRACE, "timestamps_search\n");
	return ldb_next_search(module, base, scope, expression, attrs, res);
}

static int timestamps_search_free(struct ldb_module *module, struct ldb_message **res)
{
	ldb_debug(module->ldb, LDB_DEBUG_TRACE, "timestamps_search_free\n");
	return ldb_next_search_free(module, res);
}

static int add_time_element(struct ldb_module *module, struct ldb_message *msg, 
			    const char *attr_name, const char *time_string, unsigned int flags)
{
	struct ldb_val *values;
	char *name, *timestr;
	int i;

	for (i = 0; i < msg->num_elements; i++) {
		if (ldb_attr_cmp(msg->elements[i].name, attr_name) == 0) {
			return 0;
		}
	}

	msg->elements = talloc_realloc(msg, msg->elements, 
					 struct ldb_message_element, msg->num_elements + 1);
	name = talloc_strdup(msg->elements, attr_name);
	timestr = talloc_strdup(msg->elements, time_string);
	values = talloc(msg->elements, struct ldb_val);
	if (!msg->elements || !name || !timestr || !values) {
		return -1;
	}

	msg->elements[msg->num_elements].name = name;
	msg->elements[msg->num_elements].flags = flags;
	msg->elements[msg->num_elements].num_values = 1;
	msg->elements[msg->num_elements].values = values;
	msg->elements[msg->num_elements].values[0].data = timestr;
	msg->elements[msg->num_elements].values[0].length = strlen(timestr);

	msg->num_elements += 1;

	return 0;
}

/* add_record: add crateTimestamp/modifyTimestamp attributes */
static int timestamps_add_record(struct ldb_module *module, const struct ldb_message *msg)
{
	struct ldb_message *msg2 = NULL;
	struct tm *tm;
	char *timestr;
	time_t timeval;
	int ret, i;

	ldb_debug(module->ldb, LDB_DEBUG_TRACE, "timestamps_add_record\n");

	if (msg->dn[0] != '@') { /* do not manipulate our control entries */
		timeval = time(NULL);
	 	tm = gmtime(&timeval);
		if (!tm) {
			return -1;
		}

		msg2 = talloc(module, struct ldb_message);
		if (!msg2) {
			return -1;
		}

		/* formatted like: 20040408072012.0Z */
		timestr = talloc_asprintf(msg2, "%04u%02u%02u%02u%02u%02u.0Z",
					  tm->tm_year+1900, tm->tm_mon+1,
					  tm->tm_mday, tm->tm_hour, tm->tm_min,
					  tm->tm_sec);
		if (!timestr) {
			return -1;
		}

		msg2->dn = msg->dn;
		msg2->num_elements = msg->num_elements;
		msg2->private_data = msg->private_data;
		msg2->elements = talloc_array(msg2, struct ldb_message_element, msg2->num_elements);
		for (i = 0; i < msg2->num_elements; i++) {
			msg2->elements[i] = msg->elements[i];
		}

		add_time_element(module, msg2, "createTimestamp", timestr, LDB_FLAG_MOD_ADD);
		add_time_element(module, msg2, "modifyTimestamp", timestr, LDB_FLAG_MOD_ADD);
		add_time_element(module, msg2, "whenCreated", timestr, LDB_FLAG_MOD_ADD);
		add_time_element(module, msg2, "whenChanged", timestr, LDB_FLAG_MOD_ADD);
	}

	if (msg2) {
		ret = ldb_next_add_record(module, msg2);
		talloc_free(msg2);
	} else {
		ret = ldb_next_add_record(module, msg);
	}

	return ret;
}

/* modify_record: change modifyTimestamp as well */
static int timestamps_modify_record(struct ldb_module *module, const struct ldb_message *msg)
{
	struct ldb_message *msg2 = NULL;
	struct tm *tm;
	char *timestr;
	time_t timeval;
	int ret, i;

	ldb_debug(module->ldb, LDB_DEBUG_TRACE, "timestamps_modify_record\n");

	if (msg->dn[0] != '@') { /* do not manipulate our control entries */
		timeval = time(NULL);
 		tm = gmtime(&timeval);
		if (!tm) {
			return -1;
		}

		msg2 = talloc(module, struct ldb_message);
		if (!msg2) {
			return -1;
		}

		/* formatted like: 20040408072012.0Z */
		timestr = talloc_asprintf(msg2, 
					"%04u%02u%02u%02u%02u%02u.0Z",
					tm->tm_year+1900, tm->tm_mon+1,
					tm->tm_mday, tm->tm_hour, tm->tm_min,
					tm->tm_sec);
		if (!timestr) {
			return -1;
		}

		msg2->dn = msg->dn;
		msg2->num_elements = msg->num_elements;
		msg2->private_data = msg->private_data;
		msg2->elements = talloc_array(msg2, struct ldb_message_element, msg2->num_elements);
		for (i = 0; i < msg2->num_elements; i++) {
			msg2->elements[i] = msg->elements[i];
		}

		add_time_element(module, msg2, "modifyTimestamp", timestr, LDB_FLAG_MOD_REPLACE);
		add_time_element(module, msg2, "whenChanged", timestr, LDB_FLAG_MOD_REPLACE);
	}

	if (msg2) {
		ret = ldb_next_modify_record(module, msg2);
		talloc_free(msg2);
	} else {
		ret = ldb_next_modify_record(module, msg);
	}

	return ret;
}

static int timestamps_delete_record(struct ldb_module *module, const char *dn)
{
	ldb_debug(module->ldb, LDB_DEBUG_TRACE, "timestamps_delete_record\n");
	return ldb_next_delete_record(module, dn);
}

static int timestamps_rename_record(struct ldb_module *module, const char *olddn, const char *newdn)
{
	ldb_debug(module->ldb, LDB_DEBUG_TRACE, "timestamps_rename_record\n");
	return ldb_next_rename_record(module, olddn, newdn);
}

static int timestamps_lock(struct ldb_module *module, const char *lockname)
{
	ldb_debug(module->ldb, LDB_DEBUG_TRACE, "timestamps_lock\n");
	return ldb_next_named_lock(module, lockname);
}

static int timestamps_unlock(struct ldb_module *module, const char *lockname)
{
	ldb_debug(module->ldb, LDB_DEBUG_TRACE, "timestamps_unlock\n");
	return ldb_next_named_unlock(module, lockname);
}

/* return extended error information */
static const char *timestamps_errstring(struct ldb_module *module)
{
	struct private_data *data = (struct private_data *)module->private_data;

	ldb_debug(module->ldb, LDB_DEBUG_TRACE, "timestamps_errstring\n");
	if (data->error_string) {
		const char *error;

		error = data->error_string;
		data->error_string = NULL;
		return error;
	}

	return ldb_next_errstring(module);
}

static const struct ldb_module_ops timestamps_ops = {
	"timestamps",
	timestamps_close, 
	timestamps_search,
	timestamps_search_free,
	timestamps_add_record,
	timestamps_modify_record,
	timestamps_delete_record,
	timestamps_rename_record,
	timestamps_lock,
	timestamps_unlock,
	timestamps_errstring
};


/* the init function */
#ifdef HAVE_DLOPEN_DISABLED
 struct ldb_module *init_module(struct ldb_context *ldb, const char *options[])
#else
struct ldb_module *timestamps_module_init(struct ldb_context *ldb, const char *options[])
#endif
{
	struct ldb_module *ctx;
	struct private_data *data;

	ctx = talloc(ldb, struct ldb_module);
	if (!ctx)
		return NULL;

	data = talloc(ctx, struct private_data);
	if (!data) {
		talloc_free(ctx);
		return NULL;
	}

	data->error_string = NULL;
	ctx->private_data = data;
	ctx->ldb = ldb;
	ctx->prev = ctx->next = NULL;
	ctx->ops = &timestamps_ops;

	return ctx;
}