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
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
|
/* $OpenLDAP$ */
/* This work is part of OpenLDAP Software <http://www.openldap.org/>.
*
* Copyright 2000-2018 The OpenLDAP Foundation.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted only as authorized by the OpenLDAP
* Public License.
*
* A copy of this license is available in the file LICENSE in the
* top-level directory of the distribution or, alternatively, at
* <http://www.OpenLDAP.org/license.html>.
*/
/* ACKNOWLEDGEMENT:
* This work was initially developed by Pierangelo Masarati for
* inclusion in OpenLDAP Software.
*/
#include <portable.h>
#include "rewrite-int.h"
/*
* Compares two cookies
*/
static int
rewrite_cookie_cmp(
const void *c1,
const void *c2
)
{
const struct rewrite_session *s1, *s2;
s1 = ( const struct rewrite_session * )c1;
s2 = ( const struct rewrite_session * )c2;
assert( s1 != NULL );
assert( s2 != NULL );
assert( s1->ls_cookie != NULL );
assert( s2->ls_cookie != NULL );
return ( ( s1->ls_cookie < s2->ls_cookie ) ? -1 :
( ( s1->ls_cookie > s2->ls_cookie ) ? 1 : 0 ) );
}
/*
* Duplicate cookies?
*/
static int
rewrite_cookie_dup(
void *c1,
void *c2
)
{
struct rewrite_session *s1, *s2;
s1 = ( struct rewrite_session * )c1;
s2 = ( struct rewrite_session * )c2;
assert( s1 != NULL );
assert( s2 != NULL );
assert( s1->ls_cookie != NULL );
assert( s2->ls_cookie != NULL );
assert( s1->ls_cookie != s2->ls_cookie );
return ( ( s1->ls_cookie == s2->ls_cookie ) ? -1 : 0 );
}
/*
* Inits a session
*/
struct rewrite_session *
rewrite_session_init(
struct rewrite_info *info,
const void *cookie
)
{
struct rewrite_session *session, tmp;
int rc;
assert( info != NULL );
assert( cookie != NULL );
#ifdef USE_REWRITE_LDAP_PVT_THREADS
ldap_pvt_thread_rdwr_wlock( &info->li_cookies_mutex );
#endif /* USE_REWRITE_LDAP_PVT_THREADS */
tmp.ls_cookie = ( void * )cookie;
session = ( struct rewrite_session * )avl_find( info->li_cookies,
( caddr_t )&tmp, rewrite_cookie_cmp );
if ( session ) {
session->ls_count++;
#ifdef USE_REWRITE_LDAP_PVT_THREADS
ldap_pvt_thread_rdwr_wunlock( &info->li_cookies_mutex );
#endif /* USE_REWRITE_LDAP_PVT_THREADS */
return session;
}
session = calloc( sizeof( struct rewrite_session ), 1 );
if ( session == NULL ) {
#ifdef USE_REWRITE_LDAP_PVT_THREADS
ldap_pvt_thread_rdwr_wunlock( &info->li_cookies_mutex );
#endif /* USE_REWRITE_LDAP_PVT_THREADS */
return NULL;
}
session->ls_cookie = ( void * )cookie;
session->ls_count = 1;
#ifdef USE_REWRITE_LDAP_PVT_THREADS
if ( ldap_pvt_thread_mutex_init( &session->ls_mutex ) ) {
free( session );
ldap_pvt_thread_rdwr_wunlock( &info->li_cookies_mutex );
return NULL;
}
if ( ldap_pvt_thread_rdwr_init( &session->ls_vars_mutex ) ) {
ldap_pvt_thread_mutex_destroy( &session->ls_mutex );
free( session );
ldap_pvt_thread_rdwr_wunlock( &info->li_cookies_mutex );
return NULL;
}
#endif /* USE_REWRITE_LDAP_PVT_THREADS */
rc = avl_insert( &info->li_cookies, ( caddr_t )session,
rewrite_cookie_cmp, rewrite_cookie_dup );
info->li_num_cookies++;
#ifdef USE_REWRITE_LDAP_PVT_THREADS
ldap_pvt_thread_rdwr_wunlock( &info->li_cookies_mutex );
#endif /* USE_REWRITE_LDAP_PVT_THREADS */
if ( rc != 0 ) {
#ifdef USE_REWRITE_LDAP_PVT_THREADS
ldap_pvt_thread_rdwr_destroy( &session->ls_vars_mutex );
ldap_pvt_thread_mutex_destroy( &session->ls_mutex );
#endif /* USE_REWRITE_LDAP_PVT_THREADS */
free( session );
return NULL;
}
return session;
}
/*
* Fetches a session
*/
struct rewrite_session *
rewrite_session_find(
struct rewrite_info *info,
const void *cookie
)
{
struct rewrite_session *session, tmp;
assert( info != NULL );
assert( cookie != NULL );
tmp.ls_cookie = ( void * )cookie;
#ifdef USE_REWRITE_LDAP_PVT_THREADS
ldap_pvt_thread_rdwr_rlock( &info->li_cookies_mutex );
#endif /* USE_REWRITE_LDAP_PVT_THREADS */
session = ( struct rewrite_session * )avl_find( info->li_cookies,
( caddr_t )&tmp, rewrite_cookie_cmp );
#ifdef USE_REWRITE_LDAP_PVT_THREADS
if ( session ) {
ldap_pvt_thread_mutex_lock( &session->ls_mutex );
session->ls_count++;
}
ldap_pvt_thread_rdwr_runlock( &info->li_cookies_mutex );
#endif /* USE_REWRITE_LDAP_PVT_THREADS */
return session;
}
/*
* Returns a session
*/
void
rewrite_session_return(
struct rewrite_info *info,
struct rewrite_session *session
)
{
assert( session != NULL );
session->ls_count--;
ldap_pvt_thread_mutex_unlock( &session->ls_mutex );
}
/*
* Defines and inits a var with session scope
*/
int
rewrite_session_var_set_f(
struct rewrite_info *info,
const void *cookie,
const char *name,
const char *value,
int flags
)
{
struct rewrite_session *session;
struct rewrite_var *var;
assert( info != NULL );
assert( cookie != NULL );
assert( name != NULL );
assert( value != NULL );
session = rewrite_session_find( info, cookie );
if ( session == NULL ) {
session = rewrite_session_init( info, cookie );
if ( session == NULL ) {
return REWRITE_ERR;
}
#ifdef USE_REWRITE_LDAP_PVT_THREADS
ldap_pvt_thread_mutex_lock( &session->ls_mutex );
#endif /* USE_REWRITE_LDAP_PVT_THREADS */
}
#ifdef USE_REWRITE_LDAP_PVT_THREADS
ldap_pvt_thread_rdwr_wlock( &session->ls_vars_mutex );
#endif /* USE_REWRITE_LDAP_PVT_THREADS */
var = rewrite_var_find( session->ls_vars, name );
if ( var != NULL ) {
assert( var->lv_value.bv_val != NULL );
(void)rewrite_var_replace( var, value, flags );
} else {
var = rewrite_var_insert_f( &session->ls_vars, name, value, flags );
if ( var == NULL ) {
#ifdef USE_REWRITE_LDAP_PVT_THREADS
ldap_pvt_thread_rdwr_wunlock( &session->ls_vars_mutex );
#endif /* USE_REWRITE_LDAP_PVT_THREADS */
rewrite_session_return( info, session );
return REWRITE_ERR;
}
}
#ifdef USE_REWRITE_LDAP_PVT_THREADS
ldap_pvt_thread_rdwr_wunlock( &session->ls_vars_mutex );
#endif /* USE_REWRITE_LDAP_PVT_THREADS */
rewrite_session_return( info, session );
return REWRITE_SUCCESS;
}
/*
* Gets a var with session scope
*/
int
rewrite_session_var_get(
struct rewrite_info *info,
const void *cookie,
const char *name,
struct berval *value
)
{
struct rewrite_session *session;
struct rewrite_var *var;
int rc = REWRITE_SUCCESS;
assert( info != NULL );
assert( cookie != NULL );
assert( name != NULL );
assert( value != NULL );
value->bv_val = NULL;
value->bv_len = 0;
if ( cookie == NULL ) {
return REWRITE_ERR;
}
session = rewrite_session_find( info, cookie );
if ( session == NULL ) {
return REWRITE_ERR;
}
#ifdef USE_REWRITE_LDAP_PVT_THREADS
ldap_pvt_thread_rdwr_rlock( &session->ls_vars_mutex );
#endif /* USE_REWRITE_LDAP_PVT_THREADS */
var = rewrite_var_find( session->ls_vars, name );
if ( var != NULL ) {
value->bv_val = strdup( var->lv_value.bv_val );
value->bv_len = var->lv_value.bv_len;
}
if ( var == NULL || value->bv_val == NULL ) {
rc = REWRITE_ERR;
}
#ifdef USE_REWRITE_LDAP_PVT_THREADS
ldap_pvt_thread_rdwr_runlock( &session->ls_vars_mutex );
#endif /* USE_REWRITE_LDAP_PVT_THREADS */
rewrite_session_return( info, session );
return rc;
}
static void
rewrite_session_clean( void *v_session )
{
struct rewrite_session *session = (struct rewrite_session *)v_session;
#ifdef USE_REWRITE_LDAP_PVT_THREADS
ldap_pvt_thread_rdwr_wlock( &session->ls_vars_mutex );
#endif /* USE_REWRITE_LDAP_PVT_THREADS */
rewrite_var_delete( session->ls_vars );
#ifdef USE_REWRITE_LDAP_PVT_THREADS
ldap_pvt_thread_rdwr_wunlock( &session->ls_vars_mutex );
ldap_pvt_thread_rdwr_destroy( &session->ls_vars_mutex );
ldap_pvt_thread_mutex_unlock( &session->ls_mutex );
ldap_pvt_thread_mutex_destroy( &session->ls_mutex );
#endif /* USE_REWRITE_LDAP_PVT_THREADS */
}
static void
rewrite_session_free( void *v_session )
{
struct rewrite_session *session = (struct rewrite_session *)v_session;
ldap_pvt_thread_mutex_lock( &session->ls_mutex );
rewrite_session_clean( v_session );
free( v_session );
}
/*
* Deletes a session
*/
int
rewrite_session_delete(
struct rewrite_info *info,
const void *cookie
)
{
struct rewrite_session *session, tmp = { 0 };
assert( info != NULL );
assert( cookie != NULL );
session = rewrite_session_find( info, cookie );
if ( session == NULL ) {
return REWRITE_SUCCESS;
}
if ( --session->ls_count > 0 ) {
rewrite_session_return( info, session );
return REWRITE_SUCCESS;
}
rewrite_session_clean( session );
#ifdef USE_REWRITE_LDAP_PVT_THREADS
ldap_pvt_thread_rdwr_wlock( &info->li_cookies_mutex );
#endif /* USE_REWRITE_LDAP_PVT_THREADS */
assert( info->li_num_cookies > 0 );
info->li_num_cookies--;
/*
* There is nothing to delete in the return value
*/
tmp.ls_cookie = ( void * )cookie;
avl_delete( &info->li_cookies, ( caddr_t )&tmp, rewrite_cookie_cmp );
free( session );
#ifdef USE_REWRITE_LDAP_PVT_THREADS
ldap_pvt_thread_rdwr_wunlock( &info->li_cookies_mutex );
#endif /* USE_REWRITE_LDAP_PVT_THREADS */
return REWRITE_SUCCESS;
}
/*
* Destroys the cookie tree
*/
int
rewrite_session_destroy(
struct rewrite_info *info
)
{
int count;
assert( info != NULL );
#ifdef USE_REWRITE_LDAP_PVT_THREADS
ldap_pvt_thread_rdwr_wlock( &info->li_cookies_mutex );
#endif /* USE_REWRITE_LDAP_PVT_THREADS */
/*
* Should call per-session destruction routine ...
*/
count = avl_free( info->li_cookies, rewrite_session_free );
info->li_cookies = NULL;
#if 0
fprintf( stderr, "count = %d; num_cookies = %d\n",
count, info->li_num_cookies );
#endif
assert( count == info->li_num_cookies );
info->li_num_cookies = 0;
#ifdef USE_REWRITE_LDAP_PVT_THREADS
ldap_pvt_thread_rdwr_wunlock( &info->li_cookies_mutex );
#endif /* USE_REWRITE_LDAP_PVT_THREADS */
return REWRITE_SUCCESS;
}
|
