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;);
128 irias_delete_value(attrib->value);
129 attrib->magic = ~IAS_ATTRIB_MAGIC;
134 void __irias_delete_object(struct ias_object *obj)
136 IRDA_ASSERT(obj != NULL, return;);
137 IRDA_ASSERT(obj->magic == IAS_OBJECT_MAGIC, return;);
142 hashbin_delete(obj->attribs, (FREE_FUNC) __irias_delete_attrib);
144 obj->magic = ~IAS_OBJECT_MAGIC;
150 * Function irias_delete_object (obj)
152 * Remove object from hashbin and deallocate all attributes associated with
153 * with this object and the object itself
156 int irias_delete_object(struct ias_object *obj)
158 struct ias_object *node;
160 IRDA_ASSERT(obj != NULL, return -1;);
161 IRDA_ASSERT(obj->magic == IAS_OBJECT_MAGIC, return -1;);
163 /* Remove from list */
164 node = hashbin_remove_this(irias_objects, (irda_queue_t *) obj);
166 IRDA_DEBUG( 0, "%s(), object already removed!\n",
170 __irias_delete_object(obj);
174 EXPORT_SYMBOL(irias_delete_object);
177 * Function irias_delete_attrib (obj)
179 * Remove attribute from hashbin and, if it was the last attribute of
180 * the object, remove the object as well.
183 int irias_delete_attrib(struct ias_object *obj, struct ias_attrib *attrib,
186 struct ias_attrib *node;
188 IRDA_ASSERT(obj != NULL, return -1;);
189 IRDA_ASSERT(obj->magic == IAS_OBJECT_MAGIC, return -1;);
190 IRDA_ASSERT(attrib != NULL, return -1;);
192 /* Remove attribute from object */
193 node = hashbin_remove_this(obj->attribs, (irda_queue_t *) attrib);
195 return 0; /* Already removed or non-existent */
197 /* Deallocate attribute */
198 __irias_delete_attrib(node);
200 /* Check if object has still some attributes, destroy it if none.
201 * At first glance, this look dangerous, as the kernel reference
202 * various IAS objects. However, we only use this function on
203 * user attributes, not kernel attributes, so there is no risk
204 * of deleting a kernel object this way. Jean II */
205 node = (struct ias_attrib *) hashbin_get_first(obj->attribs);
206 if (cleanobject && !node)
207 irias_delete_object(obj);
213 * Function irias_insert_object (obj)
215 * Insert an object into the LM-IAS database
218 void irias_insert_object(struct ias_object *obj)
220 IRDA_ASSERT(obj != NULL, return;);
221 IRDA_ASSERT(obj->magic == IAS_OBJECT_MAGIC, return;);
223 hashbin_insert(irias_objects, (irda_queue_t *) obj, 0, obj->name);
225 EXPORT_SYMBOL(irias_insert_object);
228 * Function irias_find_object (name)
230 * Find object with given name
233 struct ias_object *irias_find_object(char *name)
235 IRDA_ASSERT(name != NULL, return NULL;);
237 /* Unsafe (locking), object might change */
238 return hashbin_lock_find(irias_objects, 0, name);
240 EXPORT_SYMBOL(irias_find_object);
243 * Function irias_find_attrib (obj, name)
245 * Find named attribute in object
248 struct ias_attrib *irias_find_attrib(struct ias_object *obj, char *name)
250 struct ias_attrib *attrib;
252 IRDA_ASSERT(obj != NULL, return NULL;);
253 IRDA_ASSERT(obj->magic == IAS_OBJECT_MAGIC, return NULL;);
254 IRDA_ASSERT(name != NULL, return NULL;);
256 attrib = hashbin_lock_find(obj->attribs, 0, name);
260 /* Unsafe (locking), attrib might change */
263 EXPORT_SYMBOL(irias_find_attrib);
266 * Function irias_add_attribute (obj, attrib)
268 * Add attribute to object
271 static void irias_add_attrib(struct ias_object *obj, struct ias_attrib *attrib,
274 IRDA_ASSERT(obj != NULL, return;);
275 IRDA_ASSERT(obj->magic == IAS_OBJECT_MAGIC, return;);
277 IRDA_ASSERT(attrib != NULL, return;);
278 IRDA_ASSERT(attrib->magic == IAS_ATTRIB_MAGIC, return;);
280 /* Set if attrib is owned by kernel or user space */
281 attrib->value->owner = owner;
283 hashbin_insert(obj->attribs, (irda_queue_t *) attrib, 0, attrib->name);
287 * Function irias_object_change_attribute (obj_name, attrib_name, new_value)
289 * Change the value of an objects attribute.
292 int irias_object_change_attribute(char *obj_name, char *attrib_name,
293 struct ias_value *new_value)
295 struct ias_object *obj;
296 struct ias_attrib *attrib;
300 obj = hashbin_lock_find(irias_objects, 0, obj_name);
302 IRDA_WARNING("%s: Unable to find object: %s\n", __FUNCTION__,
307 /* Slightly unsafe (obj might get removed under us) */
308 spin_lock_irqsave(&obj->attribs->hb_spinlock, flags);
311 attrib = hashbin_find(obj->attribs, 0, attrib_name);
312 if (attrib == NULL) {
313 IRDA_WARNING("%s: Unable to find attribute: %s\n",
314 __FUNCTION__, attrib_name);
315 spin_unlock_irqrestore(&obj->attribs->hb_spinlock, flags);
319 if ( attrib->value->type != new_value->type) {
320 IRDA_DEBUG( 0, "%s(), changing value type not allowed!\n",
322 spin_unlock_irqrestore(&obj->attribs->hb_spinlock, flags);
326 /* Delete old value */
327 irias_delete_value(attrib->value);
329 /* Insert new value */
330 attrib->value = new_value;
333 spin_unlock_irqrestore(&obj->attribs->hb_spinlock, flags);
336 EXPORT_SYMBOL(irias_object_change_attribute);
339 * Function irias_object_add_integer_attrib (obj, name, value)
341 * Add an integer attribute to an LM-IAS object
344 void irias_add_integer_attrib(struct ias_object *obj, char *name, int value,
347 struct ias_attrib *attrib;
349 IRDA_ASSERT(obj != NULL, return;);
350 IRDA_ASSERT(obj->magic == IAS_OBJECT_MAGIC, return;);
351 IRDA_ASSERT(name != NULL, return;);
353 attrib = (struct ias_attrib *) kmalloc(sizeof(struct ias_attrib),
355 if (attrib == NULL) {
356 IRDA_WARNING("%s: Unable to allocate attribute!\n",
360 memset(attrib, 0, sizeof( struct ias_attrib));
362 attrib->magic = IAS_ATTRIB_MAGIC;
363 attrib->name = strndup(name, IAS_MAX_ATTRIBNAME);
366 attrib->value = irias_new_integer_value(value);
368 irias_add_attrib(obj, attrib, owner);
370 EXPORT_SYMBOL(irias_add_integer_attrib);
373 * Function irias_add_octseq_attrib (obj, name, octet_seq, len)
375 * Add a octet sequence attribute to an LM-IAS object
379 void irias_add_octseq_attrib(struct ias_object *obj, char *name, __u8 *octets,
382 struct ias_attrib *attrib;
384 IRDA_ASSERT(obj != NULL, return;);
385 IRDA_ASSERT(obj->magic == IAS_OBJECT_MAGIC, return;);
387 IRDA_ASSERT(name != NULL, return;);
388 IRDA_ASSERT(octets != NULL, return;);
390 attrib = (struct ias_attrib *) kmalloc(sizeof(struct ias_attrib),
392 if (attrib == NULL) {
393 IRDA_WARNING("%s: Unable to allocate attribute!\n",
397 memset(attrib, 0, sizeof( struct ias_attrib));
399 attrib->magic = IAS_ATTRIB_MAGIC;
400 attrib->name = strndup(name, IAS_MAX_ATTRIBNAME);
402 attrib->value = irias_new_octseq_value( octets, len);
404 irias_add_attrib(obj, attrib, owner);
406 EXPORT_SYMBOL(irias_add_octseq_attrib);
409 * Function irias_object_add_string_attrib (obj, string)
411 * Add a string attribute to an LM-IAS object
414 void irias_add_string_attrib(struct ias_object *obj, char *name, char *value,
417 struct ias_attrib *attrib;
419 IRDA_ASSERT(obj != NULL, return;);
420 IRDA_ASSERT(obj->magic == IAS_OBJECT_MAGIC, return;);
422 IRDA_ASSERT(name != NULL, return;);
423 IRDA_ASSERT(value != NULL, return;);
425 attrib = (struct ias_attrib *) kmalloc(sizeof( struct ias_attrib),
427 if (attrib == NULL) {
428 IRDA_WARNING("%s: Unable to allocate attribute!\n",
432 memset(attrib, 0, sizeof( struct ias_attrib));
434 attrib->magic = IAS_ATTRIB_MAGIC;
435 attrib->name = strndup(name, IAS_MAX_ATTRIBNAME);
437 attrib->value = irias_new_string_value(value);
439 irias_add_attrib(obj, attrib, owner);
441 EXPORT_SYMBOL(irias_add_string_attrib);
444 * Function irias_new_integer_value (integer)
446 * Create new IAS integer value
449 struct ias_value *irias_new_integer_value(int integer)
451 struct ias_value *value;
453 value = kmalloc(sizeof(struct ias_value), GFP_ATOMIC);
455 IRDA_WARNING("%s: Unable to kmalloc!\n", __FUNCTION__);
458 memset(value, 0, sizeof(struct ias_value));
460 value->type = IAS_INTEGER;
462 value->t.integer = integer;
466 EXPORT_SYMBOL(irias_new_integer_value);
469 * Function irias_new_string_value (string)
471 * Create new IAS string value
473 * Per IrLMP 1.1, 4.3.3.2, strings are up to 256 chars - Jean II
475 struct ias_value *irias_new_string_value(char *string)
477 struct ias_value *value;
479 value = kmalloc(sizeof(struct ias_value), GFP_ATOMIC);
481 IRDA_WARNING("%s: Unable to kmalloc!\n", __FUNCTION__);
484 memset( value, 0, sizeof( struct ias_value));
486 value->type = IAS_STRING;
487 value->charset = CS_ASCII;
488 value->t.string = strndup(string, IAS_MAX_STRING);
489 value->len = strlen(value->t.string);
493 EXPORT_SYMBOL(irias_new_string_value);
496 * Function irias_new_octseq_value (octets, len)
498 * Create new IAS octet-sequence value
500 * Per IrLMP 1.1, 4.3.3.2, octet-sequence are up to 1024 bytes - Jean II
502 struct ias_value *irias_new_octseq_value(__u8 *octseq , int len)
504 struct ias_value *value;
506 value = kmalloc(sizeof(struct ias_value), GFP_ATOMIC);
508 IRDA_WARNING("%s: Unable to kmalloc!\n", __FUNCTION__);
511 memset(value, 0, sizeof(struct ias_value));
513 value->type = IAS_OCT_SEQ;
515 if(len > IAS_MAX_OCTET_STRING)
516 len = IAS_MAX_OCTET_STRING;
519 value->t.oct_seq = kmalloc(len, GFP_ATOMIC);
520 if (value->t.oct_seq == NULL){
521 IRDA_WARNING("%s: Unable to kmalloc!\n", __FUNCTION__);
525 memcpy(value->t.oct_seq, octseq , len);
528 EXPORT_SYMBOL(irias_new_octseq_value);
530 struct ias_value *irias_new_missing_value(void)
532 struct ias_value *value;
534 value = kmalloc(sizeof(struct ias_value), GFP_ATOMIC);
536 IRDA_WARNING("%s: Unable to kmalloc!\n", __FUNCTION__);
539 memset(value, 0, sizeof(struct ias_value));
541 value->type = IAS_MISSING;
548 * Function irias_delete_value (value)
553 void irias_delete_value(struct ias_value *value)
555 IRDA_DEBUG(4, "%s()\n", __FUNCTION__);
557 IRDA_ASSERT(value != NULL, return;);
559 switch (value->type) {
560 case IAS_INTEGER: /* Fallthrough */
562 /* No need to deallocate */
565 /* If string, deallocate string */
566 if (value->t.string != NULL)
567 kfree(value->t.string);
570 /* If byte stream, deallocate byte stream */
571 if (value->t.oct_seq != NULL)
572 kfree(value->t.oct_seq);
575 IRDA_DEBUG(0, "%s(), Unknown value type!\n", __FUNCTION__);
580 EXPORT_SYMBOL(irias_delete_value);