1 /*********************************************************************
3 * Filename: irias_object.c
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>
12 * Copyright (c) 1998-1999 Dag Brattli, All Rights Reserved.
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.
19 * Neither Dag Brattli nor University of Tromsø admit liability nor
20 * provide warranty for any of this software. This material is
21 * provided "AS-IS" and at no charge.
23 ********************************************************************/
25 #include <linux/string.h>
26 #include <linux/socket.h>
27 #include <linux/module.h>
29 #include <net/irda/irda.h>
30 #include <net/irda/irias_object.h>
32 hashbin_t *irias_objects;
35 * Used when a missing value needs to be returned
37 struct ias_value irias_missing = { IAS_MISSING, 0, 0, 0, {0}};
40 * Function strndup (str, max)
42 * My own kernel version of strndup!
44 * Faster, check boundary... Jean II
46 static char *strndup(char *str, int max)
54 /* Check length, truncate */
59 /* Allocate new string */
60 new_str = kmalloc(len + 1, GFP_ATOMIC);
61 if (new_str == NULL) {
62 IRDA_WARNING("%s: Unable to kmalloc!\n", __FUNCTION__);
66 /* Copy and truncate */
67 memcpy(new_str, str, len);
74 * Function ias_new_object (name, id)
76 * Create a new IAS object
79 struct ias_object *irias_new_object( char *name, int id)
81 struct ias_object *obj;
83 IRDA_DEBUG( 4, "%s()\n", __FUNCTION__);
85 obj = (struct ias_object *) kmalloc(sizeof(struct ias_object),
88 IRDA_WARNING("%s(), Unable to allocate object!\n",
92 memset(obj, 0, sizeof( struct ias_object));
94 obj->magic = IAS_OBJECT_MAGIC;
95 obj->name = strndup(name, IAS_MAX_CLASSNAME);
98 /* Locking notes : the attrib spinlock has lower precendence
99 * than the objects spinlock. Never grap the objects spinlock
100 * while holding any attrib spinlock (risk of deadlock). Jean II */
101 obj->attribs = hashbin_new(HB_LOCK);
103 if (obj->attribs == NULL) {
104 IRDA_WARNING("%s(), Unable to allocate attribs!\n",
112 EXPORT_SYMBOL(irias_new_object);
115 * Function irias_delete_attrib (attrib)
117 * Delete given attribute and deallocate all its memory
120 static void __irias_delete_attrib(struct ias_attrib *attrib)
122 IRDA_ASSERT(attrib != NULL, return;);
123 IRDA_ASSERT(attrib->magic == IAS_ATTRIB_MAGIC, return;);
127 irias_delete_value(attrib->value);
128 attrib->magic = ~IAS_ATTRIB_MAGIC;
133 void __irias_delete_object(struct ias_object *obj)
135 IRDA_ASSERT(obj != NULL, return;);
136 IRDA_ASSERT(obj->magic == IAS_OBJECT_MAGIC, return;);
140 hashbin_delete(obj->attribs, (FREE_FUNC) __irias_delete_attrib);
142 obj->magic = ~IAS_OBJECT_MAGIC;
148 * Function irias_delete_object (obj)
150 * Remove object from hashbin and deallocate all attributes associated with
151 * with this object and the object itself
154 int irias_delete_object(struct ias_object *obj)
156 struct ias_object *node;
158 IRDA_ASSERT(obj != NULL, return -1;);
159 IRDA_ASSERT(obj->magic == IAS_OBJECT_MAGIC, return -1;);
161 /* Remove from list */
162 node = hashbin_remove_this(irias_objects, (irda_queue_t *) obj);
164 IRDA_DEBUG( 0, "%s(), object already removed!\n",
168 __irias_delete_object(obj);
172 EXPORT_SYMBOL(irias_delete_object);
175 * Function irias_delete_attrib (obj)
177 * Remove attribute from hashbin and, if it was the last attribute of
178 * the object, remove the object as well.
181 int irias_delete_attrib(struct ias_object *obj, struct ias_attrib *attrib,
184 struct ias_attrib *node;
186 IRDA_ASSERT(obj != NULL, return -1;);
187 IRDA_ASSERT(obj->magic == IAS_OBJECT_MAGIC, return -1;);
188 IRDA_ASSERT(attrib != NULL, return -1;);
190 /* Remove attribute from object */
191 node = hashbin_remove_this(obj->attribs, (irda_queue_t *) attrib);
193 return 0; /* Already removed or non-existent */
195 /* Deallocate attribute */
196 __irias_delete_attrib(node);
198 /* Check if object has still some attributes, destroy it if none.
199 * At first glance, this look dangerous, as the kernel reference
200 * various IAS objects. However, we only use this function on
201 * user attributes, not kernel attributes, so there is no risk
202 * of deleting a kernel object this way. Jean II */
203 node = (struct ias_attrib *) hashbin_get_first(obj->attribs);
204 if (cleanobject && !node)
205 irias_delete_object(obj);
211 * Function irias_insert_object (obj)
213 * Insert an object into the LM-IAS database
216 void irias_insert_object(struct ias_object *obj)
218 IRDA_ASSERT(obj != NULL, return;);
219 IRDA_ASSERT(obj->magic == IAS_OBJECT_MAGIC, return;);
221 hashbin_insert(irias_objects, (irda_queue_t *) obj, 0, obj->name);
223 EXPORT_SYMBOL(irias_insert_object);
226 * Function irias_find_object (name)
228 * Find object with given name
231 struct ias_object *irias_find_object(char *name)
233 IRDA_ASSERT(name != NULL, return NULL;);
235 /* Unsafe (locking), object might change */
236 return hashbin_lock_find(irias_objects, 0, name);
238 EXPORT_SYMBOL(irias_find_object);
241 * Function irias_find_attrib (obj, name)
243 * Find named attribute in object
246 struct ias_attrib *irias_find_attrib(struct ias_object *obj, char *name)
248 struct ias_attrib *attrib;
250 IRDA_ASSERT(obj != NULL, return NULL;);
251 IRDA_ASSERT(obj->magic == IAS_OBJECT_MAGIC, return NULL;);
252 IRDA_ASSERT(name != NULL, return NULL;);
254 attrib = hashbin_lock_find(obj->attribs, 0, name);
258 /* Unsafe (locking), attrib might change */
261 EXPORT_SYMBOL(irias_find_attrib);
264 * Function irias_add_attribute (obj, attrib)
266 * Add attribute to object
269 static void irias_add_attrib(struct ias_object *obj, struct ias_attrib *attrib,
272 IRDA_ASSERT(obj != NULL, return;);
273 IRDA_ASSERT(obj->magic == IAS_OBJECT_MAGIC, return;);
275 IRDA_ASSERT(attrib != NULL, return;);
276 IRDA_ASSERT(attrib->magic == IAS_ATTRIB_MAGIC, return;);
278 /* Set if attrib is owned by kernel or user space */
279 attrib->value->owner = owner;
281 hashbin_insert(obj->attribs, (irda_queue_t *) attrib, 0, attrib->name);
285 * Function irias_object_change_attribute (obj_name, attrib_name, new_value)
287 * Change the value of an objects attribute.
290 int irias_object_change_attribute(char *obj_name, char *attrib_name,
291 struct ias_value *new_value)
293 struct ias_object *obj;
294 struct ias_attrib *attrib;
298 obj = hashbin_lock_find(irias_objects, 0, obj_name);
300 IRDA_WARNING("%s: Unable to find object: %s\n", __FUNCTION__,
305 /* Slightly unsafe (obj might get removed under us) */
306 spin_lock_irqsave(&obj->attribs->hb_spinlock, flags);
309 attrib = hashbin_find(obj->attribs, 0, attrib_name);
310 if (attrib == NULL) {
311 IRDA_WARNING("%s: Unable to find attribute: %s\n",
312 __FUNCTION__, attrib_name);
313 spin_unlock_irqrestore(&obj->attribs->hb_spinlock, flags);
317 if ( attrib->value->type != new_value->type) {
318 IRDA_DEBUG( 0, "%s(), changing value type not allowed!\n",
320 spin_unlock_irqrestore(&obj->attribs->hb_spinlock, flags);
324 /* Delete old value */
325 irias_delete_value(attrib->value);
327 /* Insert new value */
328 attrib->value = new_value;
331 spin_unlock_irqrestore(&obj->attribs->hb_spinlock, flags);
334 EXPORT_SYMBOL(irias_object_change_attribute);
337 * Function irias_object_add_integer_attrib (obj, name, value)
339 * Add an integer attribute to an LM-IAS object
342 void irias_add_integer_attrib(struct ias_object *obj, char *name, int value,
345 struct ias_attrib *attrib;
347 IRDA_ASSERT(obj != NULL, return;);
348 IRDA_ASSERT(obj->magic == IAS_OBJECT_MAGIC, return;);
349 IRDA_ASSERT(name != NULL, return;);
351 attrib = (struct ias_attrib *) kmalloc(sizeof(struct ias_attrib),
353 if (attrib == NULL) {
354 IRDA_WARNING("%s: Unable to allocate attribute!\n",
358 memset(attrib, 0, sizeof( struct ias_attrib));
360 attrib->magic = IAS_ATTRIB_MAGIC;
361 attrib->name = strndup(name, IAS_MAX_ATTRIBNAME);
364 attrib->value = irias_new_integer_value(value);
366 irias_add_attrib(obj, attrib, owner);
368 EXPORT_SYMBOL(irias_add_integer_attrib);
371 * Function irias_add_octseq_attrib (obj, name, octet_seq, len)
373 * Add a octet sequence attribute to an LM-IAS object
377 void irias_add_octseq_attrib(struct ias_object *obj, char *name, __u8 *octets,
380 struct ias_attrib *attrib;
382 IRDA_ASSERT(obj != NULL, return;);
383 IRDA_ASSERT(obj->magic == IAS_OBJECT_MAGIC, return;);
385 IRDA_ASSERT(name != NULL, return;);
386 IRDA_ASSERT(octets != NULL, return;);
388 attrib = (struct ias_attrib *) kmalloc(sizeof(struct ias_attrib),
390 if (attrib == NULL) {
391 IRDA_WARNING("%s: Unable to allocate attribute!\n",
395 memset(attrib, 0, sizeof( struct ias_attrib));
397 attrib->magic = IAS_ATTRIB_MAGIC;
398 attrib->name = strndup(name, IAS_MAX_ATTRIBNAME);
400 attrib->value = irias_new_octseq_value( octets, len);
402 irias_add_attrib(obj, attrib, owner);
404 EXPORT_SYMBOL(irias_add_octseq_attrib);
407 * Function irias_object_add_string_attrib (obj, string)
409 * Add a string attribute to an LM-IAS object
412 void irias_add_string_attrib(struct ias_object *obj, char *name, char *value,
415 struct ias_attrib *attrib;
417 IRDA_ASSERT(obj != NULL, return;);
418 IRDA_ASSERT(obj->magic == IAS_OBJECT_MAGIC, return;);
420 IRDA_ASSERT(name != NULL, return;);
421 IRDA_ASSERT(value != NULL, return;);
423 attrib = (struct ias_attrib *) kmalloc(sizeof( struct ias_attrib),
425 if (attrib == NULL) {
426 IRDA_WARNING("%s: Unable to allocate attribute!\n",
430 memset(attrib, 0, sizeof( struct ias_attrib));
432 attrib->magic = IAS_ATTRIB_MAGIC;
433 attrib->name = strndup(name, IAS_MAX_ATTRIBNAME);
435 attrib->value = irias_new_string_value(value);
437 irias_add_attrib(obj, attrib, owner);
439 EXPORT_SYMBOL(irias_add_string_attrib);
442 * Function irias_new_integer_value (integer)
444 * Create new IAS integer value
447 struct ias_value *irias_new_integer_value(int integer)
449 struct ias_value *value;
451 value = kmalloc(sizeof(struct ias_value), GFP_ATOMIC);
453 IRDA_WARNING("%s: Unable to kmalloc!\n", __FUNCTION__);
456 memset(value, 0, sizeof(struct ias_value));
458 value->type = IAS_INTEGER;
460 value->t.integer = integer;
464 EXPORT_SYMBOL(irias_new_integer_value);
467 * Function irias_new_string_value (string)
469 * Create new IAS string value
471 * Per IrLMP 1.1, 4.3.3.2, strings are up to 256 chars - Jean II
473 struct ias_value *irias_new_string_value(char *string)
475 struct ias_value *value;
477 value = kmalloc(sizeof(struct ias_value), GFP_ATOMIC);
479 IRDA_WARNING("%s: Unable to kmalloc!\n", __FUNCTION__);
482 memset( value, 0, sizeof( struct ias_value));
484 value->type = IAS_STRING;
485 value->charset = CS_ASCII;
486 value->t.string = strndup(string, IAS_MAX_STRING);
487 value->len = strlen(value->t.string);
491 EXPORT_SYMBOL(irias_new_string_value);
494 * Function irias_new_octseq_value (octets, len)
496 * Create new IAS octet-sequence value
498 * Per IrLMP 1.1, 4.3.3.2, octet-sequence are up to 1024 bytes - Jean II
500 struct ias_value *irias_new_octseq_value(__u8 *octseq , int len)
502 struct ias_value *value;
504 value = kmalloc(sizeof(struct ias_value), GFP_ATOMIC);
506 IRDA_WARNING("%s: Unable to kmalloc!\n", __FUNCTION__);
509 memset(value, 0, sizeof(struct ias_value));
511 value->type = IAS_OCT_SEQ;
513 if(len > IAS_MAX_OCTET_STRING)
514 len = IAS_MAX_OCTET_STRING;
517 value->t.oct_seq = kmalloc(len, GFP_ATOMIC);
518 if (value->t.oct_seq == NULL){
519 IRDA_WARNING("%s: Unable to kmalloc!\n", __FUNCTION__);
523 memcpy(value->t.oct_seq, octseq , len);
526 EXPORT_SYMBOL(irias_new_octseq_value);
528 struct ias_value *irias_new_missing_value(void)
530 struct ias_value *value;
532 value = kmalloc(sizeof(struct ias_value), GFP_ATOMIC);
534 IRDA_WARNING("%s: Unable to kmalloc!\n", __FUNCTION__);
537 memset(value, 0, sizeof(struct ias_value));
539 value->type = IAS_MISSING;
546 * Function irias_delete_value (value)
551 void irias_delete_value(struct ias_value *value)
553 IRDA_DEBUG(4, "%s()\n", __FUNCTION__);
555 IRDA_ASSERT(value != NULL, return;);
557 switch (value->type) {
558 case IAS_INTEGER: /* Fallthrough */
560 /* No need to deallocate */
563 /* Deallocate string */
564 kfree(value->t.string);
567 /* Deallocate byte stream */
568 kfree(value->t.oct_seq);
571 IRDA_DEBUG(0, "%s(), Unknown value type!\n", __FUNCTION__);
576 EXPORT_SYMBOL(irias_delete_value);