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Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*********************************************************************
2 *
3 * Filename: irias_object.c
4 * Version: 0.3
5 * Description: IAS object database and functions
6 * Status: Experimental.
7 * Author: Dag Brattli <dagb@cs.uit.no>
8 * Created at: Thu Oct 1 22:50:04 1998
9 * Modified at: Wed Dec 15 11:23:16 1999
10 * Modified by: Dag Brattli <dagb@cs.uit.no>
11 *
12 * Copyright (c) 1998-1999 Dag Brattli, All Rights Reserved.
13 *
14 * This program is free software; you can redistribute it and/or
15 * modify it under the terms of the GNU General Public License as
16 * published by the Free Software Foundation; either version 2 of
17 * the License, or (at your option) any later version.
18 *
Jan Engelhardt96de0e22007-10-19 23:21:04 +020019 * Neither Dag Brattli nor University of Tromsø admit liability nor
Linus Torvalds1da177e2005-04-16 15:20:36 -070020 * provide warranty for any of this software. This material is
21 * provided "AS-IS" and at no charge.
22 *
23 ********************************************************************/
24
25#include <linux/string.h>
26#include <linux/socket.h>
27#include <linux/module.h>
28
29#include <net/irda/irda.h>
30#include <net/irda/irias_object.h>
31
32hashbin_t *irias_objects;
33
34/*
35 * Used when a missing value needs to be returned
36 */
37struct ias_value irias_missing = { IAS_MISSING, 0, 0, 0, {0}};
38
Linus Torvalds1da177e2005-04-16 15:20:36 -070039
40/*
41 * Function ias_new_object (name, id)
42 *
43 * Create a new IAS object
44 *
45 */
46struct ias_object *irias_new_object( char *name, int id)
47{
YOSHIFUJI Hideaki6819bc22007-02-09 23:24:53 +090048 struct ias_object *obj;
Linus Torvalds1da177e2005-04-16 15:20:36 -070049
50 IRDA_DEBUG( 4, "%s()\n", __FUNCTION__);
51
Panagiotis Issaris0da974f2006-07-21 14:51:30 -070052 obj = kzalloc(sizeof(struct ias_object), GFP_ATOMIC);
Linus Torvalds1da177e2005-04-16 15:20:36 -070053 if (obj == NULL) {
54 IRDA_WARNING("%s(), Unable to allocate object!\n",
55 __FUNCTION__);
56 return NULL;
57 }
Linus Torvalds1da177e2005-04-16 15:20:36 -070058
59 obj->magic = IAS_OBJECT_MAGIC;
Jeremy Fitzhardinge1e66df32007-07-17 18:37:02 -070060 obj->name = kstrndup(name, IAS_MAX_CLASSNAME, GFP_ATOMIC);
Akinobu Mitabb5aa422007-02-07 00:11:11 -080061 if (!obj->name) {
62 IRDA_WARNING("%s(), Unable to allocate name!\n",
63 __FUNCTION__);
64 kfree(obj);
65 return NULL;
66 }
Linus Torvalds1da177e2005-04-16 15:20:36 -070067 obj->id = id;
68
69 /* Locking notes : the attrib spinlock has lower precendence
70 * than the objects spinlock. Never grap the objects spinlock
71 * while holding any attrib spinlock (risk of deadlock). Jean II */
72 obj->attribs = hashbin_new(HB_LOCK);
73
74 if (obj->attribs == NULL) {
75 IRDA_WARNING("%s(), Unable to allocate attribs!\n",
76 __FUNCTION__);
Akinobu Mitabb5aa422007-02-07 00:11:11 -080077 kfree(obj->name);
Linus Torvalds1da177e2005-04-16 15:20:36 -070078 kfree(obj);
79 return NULL;
80 }
81
82 return obj;
83}
84EXPORT_SYMBOL(irias_new_object);
85
86/*
87 * Function irias_delete_attrib (attrib)
88 *
89 * Delete given attribute and deallocate all its memory
90 *
91 */
92static void __irias_delete_attrib(struct ias_attrib *attrib)
93{
94 IRDA_ASSERT(attrib != NULL, return;);
95 IRDA_ASSERT(attrib->magic == IAS_ATTRIB_MAGIC, return;);
96
Jesper Juhla51482b2005-11-08 09:41:34 -080097 kfree(attrib->name);
Linus Torvalds1da177e2005-04-16 15:20:36 -070098
99 irias_delete_value(attrib->value);
100 attrib->magic = ~IAS_ATTRIB_MAGIC;
101
102 kfree(attrib);
103}
104
105void __irias_delete_object(struct ias_object *obj)
106{
107 IRDA_ASSERT(obj != NULL, return;);
108 IRDA_ASSERT(obj->magic == IAS_OBJECT_MAGIC, return;);
109
Jesper Juhla51482b2005-11-08 09:41:34 -0800110 kfree(obj->name);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700111
112 hashbin_delete(obj->attribs, (FREE_FUNC) __irias_delete_attrib);
113
114 obj->magic = ~IAS_OBJECT_MAGIC;
115
116 kfree(obj);
117}
118
119/*
120 * Function irias_delete_object (obj)
121 *
122 * Remove object from hashbin and deallocate all attributes associated with
123 * with this object and the object itself
124 *
125 */
126int irias_delete_object(struct ias_object *obj)
127{
128 struct ias_object *node;
129
130 IRDA_ASSERT(obj != NULL, return -1;);
131 IRDA_ASSERT(obj->magic == IAS_OBJECT_MAGIC, return -1;);
132
133 /* Remove from list */
134 node = hashbin_remove_this(irias_objects, (irda_queue_t *) obj);
135 if (!node)
136 IRDA_DEBUG( 0, "%s(), object already removed!\n",
137 __FUNCTION__);
138
139 /* Destroy */
140 __irias_delete_object(obj);
141
142 return 0;
143}
144EXPORT_SYMBOL(irias_delete_object);
145
146/*
147 * Function irias_delete_attrib (obj)
148 *
149 * Remove attribute from hashbin and, if it was the last attribute of
150 * the object, remove the object as well.
151 *
152 */
153int irias_delete_attrib(struct ias_object *obj, struct ias_attrib *attrib,
154 int cleanobject)
155{
156 struct ias_attrib *node;
157
158 IRDA_ASSERT(obj != NULL, return -1;);
159 IRDA_ASSERT(obj->magic == IAS_OBJECT_MAGIC, return -1;);
160 IRDA_ASSERT(attrib != NULL, return -1;);
161
162 /* Remove attribute from object */
163 node = hashbin_remove_this(obj->attribs, (irda_queue_t *) attrib);
164 if (!node)
165 return 0; /* Already removed or non-existent */
166
167 /* Deallocate attribute */
168 __irias_delete_attrib(node);
169
170 /* Check if object has still some attributes, destroy it if none.
171 * At first glance, this look dangerous, as the kernel reference
172 * various IAS objects. However, we only use this function on
173 * user attributes, not kernel attributes, so there is no risk
174 * of deleting a kernel object this way. Jean II */
175 node = (struct ias_attrib *) hashbin_get_first(obj->attribs);
176 if (cleanobject && !node)
177 irias_delete_object(obj);
178
179 return 0;
180}
181
182/*
183 * Function irias_insert_object (obj)
184 *
185 * Insert an object into the LM-IAS database
186 *
187 */
188void irias_insert_object(struct ias_object *obj)
189{
190 IRDA_ASSERT(obj != NULL, return;);
191 IRDA_ASSERT(obj->magic == IAS_OBJECT_MAGIC, return;);
192
193 hashbin_insert(irias_objects, (irda_queue_t *) obj, 0, obj->name);
194}
195EXPORT_SYMBOL(irias_insert_object);
196
197/*
198 * Function irias_find_object (name)
199 *
200 * Find object with given name
201 *
202 */
203struct ias_object *irias_find_object(char *name)
204{
205 IRDA_ASSERT(name != NULL, return NULL;);
206
207 /* Unsafe (locking), object might change */
208 return hashbin_lock_find(irias_objects, 0, name);
209}
210EXPORT_SYMBOL(irias_find_object);
211
212/*
213 * Function irias_find_attrib (obj, name)
214 *
215 * Find named attribute in object
216 *
217 */
218struct ias_attrib *irias_find_attrib(struct ias_object *obj, char *name)
219{
220 struct ias_attrib *attrib;
221
222 IRDA_ASSERT(obj != NULL, return NULL;);
223 IRDA_ASSERT(obj->magic == IAS_OBJECT_MAGIC, return NULL;);
224 IRDA_ASSERT(name != NULL, return NULL;);
225
226 attrib = hashbin_lock_find(obj->attribs, 0, name);
227 if (attrib == NULL)
228 return NULL;
229
230 /* Unsafe (locking), attrib might change */
231 return attrib;
232}
Linus Torvalds1da177e2005-04-16 15:20:36 -0700233
234/*
235 * Function irias_add_attribute (obj, attrib)
236 *
237 * Add attribute to object
238 *
239 */
240static void irias_add_attrib(struct ias_object *obj, struct ias_attrib *attrib,
241 int owner)
242{
243 IRDA_ASSERT(obj != NULL, return;);
244 IRDA_ASSERT(obj->magic == IAS_OBJECT_MAGIC, return;);
245
246 IRDA_ASSERT(attrib != NULL, return;);
247 IRDA_ASSERT(attrib->magic == IAS_ATTRIB_MAGIC, return;);
248
249 /* Set if attrib is owned by kernel or user space */
250 attrib->value->owner = owner;
251
252 hashbin_insert(obj->attribs, (irda_queue_t *) attrib, 0, attrib->name);
253}
254
255/*
256 * Function irias_object_change_attribute (obj_name, attrib_name, new_value)
257 *
258 * Change the value of an objects attribute.
259 *
260 */
261int irias_object_change_attribute(char *obj_name, char *attrib_name,
262 struct ias_value *new_value)
263{
264 struct ias_object *obj;
265 struct ias_attrib *attrib;
266 unsigned long flags;
267
268 /* Find object */
269 obj = hashbin_lock_find(irias_objects, 0, obj_name);
270 if (obj == NULL) {
271 IRDA_WARNING("%s: Unable to find object: %s\n", __FUNCTION__,
272 obj_name);
273 return -1;
274 }
275
276 /* Slightly unsafe (obj might get removed under us) */
277 spin_lock_irqsave(&obj->attribs->hb_spinlock, flags);
278
279 /* Find attribute */
280 attrib = hashbin_find(obj->attribs, 0, attrib_name);
281 if (attrib == NULL) {
282 IRDA_WARNING("%s: Unable to find attribute: %s\n",
283 __FUNCTION__, attrib_name);
284 spin_unlock_irqrestore(&obj->attribs->hb_spinlock, flags);
285 return -1;
286 }
287
288 if ( attrib->value->type != new_value->type) {
289 IRDA_DEBUG( 0, "%s(), changing value type not allowed!\n",
290 __FUNCTION__);
291 spin_unlock_irqrestore(&obj->attribs->hb_spinlock, flags);
292 return -1;
293 }
294
295 /* Delete old value */
296 irias_delete_value(attrib->value);
297
298 /* Insert new value */
299 attrib->value = new_value;
300
301 /* Success */
302 spin_unlock_irqrestore(&obj->attribs->hb_spinlock, flags);
303 return 0;
304}
305EXPORT_SYMBOL(irias_object_change_attribute);
306
307/*
308 * Function irias_object_add_integer_attrib (obj, name, value)
309 *
310 * Add an integer attribute to an LM-IAS object
311 *
312 */
313void irias_add_integer_attrib(struct ias_object *obj, char *name, int value,
314 int owner)
315{
316 struct ias_attrib *attrib;
317
318 IRDA_ASSERT(obj != NULL, return;);
319 IRDA_ASSERT(obj->magic == IAS_OBJECT_MAGIC, return;);
320 IRDA_ASSERT(name != NULL, return;);
321
Panagiotis Issaris0da974f2006-07-21 14:51:30 -0700322 attrib = kzalloc(sizeof(struct ias_attrib), GFP_ATOMIC);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700323 if (attrib == NULL) {
324 IRDA_WARNING("%s: Unable to allocate attribute!\n",
325 __FUNCTION__);
326 return;
327 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700328
329 attrib->magic = IAS_ATTRIB_MAGIC;
Jeremy Fitzhardinge1e66df32007-07-17 18:37:02 -0700330 attrib->name = kstrndup(name, IAS_MAX_ATTRIBNAME, GFP_ATOMIC);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700331
332 /* Insert value */
333 attrib->value = irias_new_integer_value(value);
Akinobu Mitabb5aa422007-02-07 00:11:11 -0800334 if (!attrib->name || !attrib->value) {
335 IRDA_WARNING("%s: Unable to allocate attribute!\n",
336 __FUNCTION__);
337 if (attrib->value)
338 irias_delete_value(attrib->value);
339 kfree(attrib->name);
340 kfree(attrib);
341 return;
342 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700343
344 irias_add_attrib(obj, attrib, owner);
345}
346EXPORT_SYMBOL(irias_add_integer_attrib);
347
348 /*
349 * Function irias_add_octseq_attrib (obj, name, octet_seq, len)
350 *
351 * Add a octet sequence attribute to an LM-IAS object
352 *
353 */
354
355void irias_add_octseq_attrib(struct ias_object *obj, char *name, __u8 *octets,
356 int len, int owner)
357{
358 struct ias_attrib *attrib;
359
360 IRDA_ASSERT(obj != NULL, return;);
361 IRDA_ASSERT(obj->magic == IAS_OBJECT_MAGIC, return;);
362
363 IRDA_ASSERT(name != NULL, return;);
364 IRDA_ASSERT(octets != NULL, return;);
365
Panagiotis Issaris0da974f2006-07-21 14:51:30 -0700366 attrib = kzalloc(sizeof(struct ias_attrib), GFP_ATOMIC);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700367 if (attrib == NULL) {
368 IRDA_WARNING("%s: Unable to allocate attribute!\n",
369 __FUNCTION__);
370 return;
371 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700372
373 attrib->magic = IAS_ATTRIB_MAGIC;
Jeremy Fitzhardinge1e66df32007-07-17 18:37:02 -0700374 attrib->name = kstrndup(name, IAS_MAX_ATTRIBNAME, GFP_ATOMIC);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700375
376 attrib->value = irias_new_octseq_value( octets, len);
Akinobu Mitabb5aa422007-02-07 00:11:11 -0800377 if (!attrib->name || !attrib->value) {
378 IRDA_WARNING("%s: Unable to allocate attribute!\n",
379 __FUNCTION__);
380 if (attrib->value)
381 irias_delete_value(attrib->value);
382 kfree(attrib->name);
383 kfree(attrib);
384 return;
385 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700386
387 irias_add_attrib(obj, attrib, owner);
388}
389EXPORT_SYMBOL(irias_add_octseq_attrib);
390
391/*
392 * Function irias_object_add_string_attrib (obj, string)
393 *
394 * Add a string attribute to an LM-IAS object
395 *
396 */
397void irias_add_string_attrib(struct ias_object *obj, char *name, char *value,
398 int owner)
399{
400 struct ias_attrib *attrib;
401
402 IRDA_ASSERT(obj != NULL, return;);
403 IRDA_ASSERT(obj->magic == IAS_OBJECT_MAGIC, return;);
404
405 IRDA_ASSERT(name != NULL, return;);
406 IRDA_ASSERT(value != NULL, return;);
407
Panagiotis Issaris0da974f2006-07-21 14:51:30 -0700408 attrib = kzalloc(sizeof( struct ias_attrib), GFP_ATOMIC);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700409 if (attrib == NULL) {
410 IRDA_WARNING("%s: Unable to allocate attribute!\n",
411 __FUNCTION__);
412 return;
413 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700414
415 attrib->magic = IAS_ATTRIB_MAGIC;
Jeremy Fitzhardinge1e66df32007-07-17 18:37:02 -0700416 attrib->name = kstrndup(name, IAS_MAX_ATTRIBNAME, GFP_ATOMIC);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700417
418 attrib->value = irias_new_string_value(value);
Akinobu Mitabb5aa422007-02-07 00:11:11 -0800419 if (!attrib->name || !attrib->value) {
420 IRDA_WARNING("%s: Unable to allocate attribute!\n",
421 __FUNCTION__);
422 if (attrib->value)
423 irias_delete_value(attrib->value);
424 kfree(attrib->name);
425 kfree(attrib);
426 return;
427 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700428
429 irias_add_attrib(obj, attrib, owner);
430}
431EXPORT_SYMBOL(irias_add_string_attrib);
432
433/*
434 * Function irias_new_integer_value (integer)
435 *
436 * Create new IAS integer value
437 *
438 */
439struct ias_value *irias_new_integer_value(int integer)
440{
441 struct ias_value *value;
442
Panagiotis Issaris0da974f2006-07-21 14:51:30 -0700443 value = kzalloc(sizeof(struct ias_value), GFP_ATOMIC);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700444 if (value == NULL) {
445 IRDA_WARNING("%s: Unable to kmalloc!\n", __FUNCTION__);
446 return NULL;
447 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700448
449 value->type = IAS_INTEGER;
450 value->len = 4;
451 value->t.integer = integer;
452
453 return value;
454}
455EXPORT_SYMBOL(irias_new_integer_value);
456
457/*
458 * Function irias_new_string_value (string)
459 *
460 * Create new IAS string value
461 *
462 * Per IrLMP 1.1, 4.3.3.2, strings are up to 256 chars - Jean II
463 */
464struct ias_value *irias_new_string_value(char *string)
465{
466 struct ias_value *value;
467
Panagiotis Issaris0da974f2006-07-21 14:51:30 -0700468 value = kzalloc(sizeof(struct ias_value), GFP_ATOMIC);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700469 if (value == NULL) {
470 IRDA_WARNING("%s: Unable to kmalloc!\n", __FUNCTION__);
471 return NULL;
472 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700473
474 value->type = IAS_STRING;
475 value->charset = CS_ASCII;
Jeremy Fitzhardinge1e66df32007-07-17 18:37:02 -0700476 value->t.string = kstrndup(string, IAS_MAX_STRING, GFP_ATOMIC);
Akinobu Mitabb5aa422007-02-07 00:11:11 -0800477 if (!value->t.string) {
478 IRDA_WARNING("%s: Unable to kmalloc!\n", __FUNCTION__);
479 kfree(value);
480 return NULL;
481 }
482
Linus Torvalds1da177e2005-04-16 15:20:36 -0700483 value->len = strlen(value->t.string);
484
485 return value;
486}
Linus Torvalds1da177e2005-04-16 15:20:36 -0700487
488/*
489 * Function irias_new_octseq_value (octets, len)
490 *
491 * Create new IAS octet-sequence value
492 *
493 * Per IrLMP 1.1, 4.3.3.2, octet-sequence are up to 1024 bytes - Jean II
494 */
495struct ias_value *irias_new_octseq_value(__u8 *octseq , int len)
496{
497 struct ias_value *value;
498
Panagiotis Issaris0da974f2006-07-21 14:51:30 -0700499 value = kzalloc(sizeof(struct ias_value), GFP_ATOMIC);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700500 if (value == NULL) {
501 IRDA_WARNING("%s: Unable to kmalloc!\n", __FUNCTION__);
502 return NULL;
503 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700504
505 value->type = IAS_OCT_SEQ;
506 /* Check length */
507 if(len > IAS_MAX_OCTET_STRING)
508 len = IAS_MAX_OCTET_STRING;
509 value->len = len;
510
Arnaldo Carvalho de Melob3ab09f2006-11-21 01:18:33 -0200511 value->t.oct_seq = kmemdup(octseq, len, GFP_ATOMIC);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700512 if (value->t.oct_seq == NULL){
513 IRDA_WARNING("%s: Unable to kmalloc!\n", __FUNCTION__);
514 kfree(value);
515 return NULL;
516 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700517 return value;
518}
Linus Torvalds1da177e2005-04-16 15:20:36 -0700519
520struct ias_value *irias_new_missing_value(void)
521{
522 struct ias_value *value;
523
Panagiotis Issaris0da974f2006-07-21 14:51:30 -0700524 value = kzalloc(sizeof(struct ias_value), GFP_ATOMIC);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700525 if (value == NULL) {
526 IRDA_WARNING("%s: Unable to kmalloc!\n", __FUNCTION__);
527 return NULL;
528 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700529
530 value->type = IAS_MISSING;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700531
532 return value;
533}
534
535/*
536 * Function irias_delete_value (value)
537 *
538 * Delete IAS value
539 *
540 */
541void irias_delete_value(struct ias_value *value)
542{
543 IRDA_DEBUG(4, "%s()\n", __FUNCTION__);
544
545 IRDA_ASSERT(value != NULL, return;);
546
547 switch (value->type) {
548 case IAS_INTEGER: /* Fallthrough */
549 case IAS_MISSING:
550 /* No need to deallocate */
551 break;
552 case IAS_STRING:
Jesper Juhla51482b2005-11-08 09:41:34 -0800553 /* Deallocate string */
554 kfree(value->t.string);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700555 break;
556 case IAS_OCT_SEQ:
Jesper Juhla51482b2005-11-08 09:41:34 -0800557 /* Deallocate byte stream */
558 kfree(value->t.oct_seq);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700559 break;
560 default:
561 IRDA_DEBUG(0, "%s(), Unknown value type!\n", __FUNCTION__);
562 break;
563 }
564 kfree(value);
565}
566EXPORT_SYMBOL(irias_delete_value);