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 = kmalloc(sizeof(struct ias_object), GFP_ATOMIC);
87 IRDA_WARNING("%s(), Unable to allocate object!\n",
91 memset(obj, 0, sizeof( struct ias_object));
93 obj->magic = IAS_OBJECT_MAGIC;
94 obj->name = strndup(name, IAS_MAX_CLASSNAME);
97 /* Locking notes : the attrib spinlock has lower precendence
98 * than the objects spinlock. Never grap the objects spinlock
99 * while holding any attrib spinlock (risk of deadlock). Jean II */
100 obj->attribs = hashbin_new(HB_LOCK);
102 if (obj->attribs == NULL) {
103 IRDA_WARNING("%s(), Unable to allocate attribs!\n",
111 EXPORT_SYMBOL(irias_new_object);
114 * Function irias_delete_attrib (attrib)
116 * Delete given attribute and deallocate all its memory
119 static void __irias_delete_attrib(struct ias_attrib *attrib)
121 IRDA_ASSERT(attrib != NULL, return;);
122 IRDA_ASSERT(attrib->magic == IAS_ATTRIB_MAGIC, return;);
126 irias_delete_value(attrib->value);
127 attrib->magic = ~IAS_ATTRIB_MAGIC;
132 void __irias_delete_object(struct ias_object *obj)
134 IRDA_ASSERT(obj != NULL, return;);
135 IRDA_ASSERT(obj->magic == IAS_OBJECT_MAGIC, return;);
139 hashbin_delete(obj->attribs, (FREE_FUNC) __irias_delete_attrib);
141 obj->magic = ~IAS_OBJECT_MAGIC;
147 * Function irias_delete_object (obj)
149 * Remove object from hashbin and deallocate all attributes associated with
150 * with this object and the object itself
153 int irias_delete_object(struct ias_object *obj)
155 struct ias_object *node;
157 IRDA_ASSERT(obj != NULL, return -1;);
158 IRDA_ASSERT(obj->magic == IAS_OBJECT_MAGIC, return -1;);
160 /* Remove from list */
161 node = hashbin_remove_this(irias_objects, (irda_queue_t *) obj);
163 IRDA_DEBUG( 0, "%s(), object already removed!\n",
167 __irias_delete_object(obj);
171 EXPORT_SYMBOL(irias_delete_object);
174 * Function irias_delete_attrib (obj)
176 * Remove attribute from hashbin and, if it was the last attribute of
177 * the object, remove the object as well.
180 int irias_delete_attrib(struct ias_object *obj, struct ias_attrib *attrib,
183 struct ias_attrib *node;
185 IRDA_ASSERT(obj != NULL, return -1;);
186 IRDA_ASSERT(obj->magic == IAS_OBJECT_MAGIC, return -1;);
187 IRDA_ASSERT(attrib != NULL, return -1;);
189 /* Remove attribute from object */
190 node = hashbin_remove_this(obj->attribs, (irda_queue_t *) attrib);
192 return 0; /* Already removed or non-existent */
194 /* Deallocate attribute */
195 __irias_delete_attrib(node);
197 /* Check if object has still some attributes, destroy it if none.
198 * At first glance, this look dangerous, as the kernel reference
199 * various IAS objects. However, we only use this function on
200 * user attributes, not kernel attributes, so there is no risk
201 * of deleting a kernel object this way. Jean II */
202 node = (struct ias_attrib *) hashbin_get_first(obj->attribs);
203 if (cleanobject && !node)
204 irias_delete_object(obj);
210 * Function irias_insert_object (obj)
212 * Insert an object into the LM-IAS database
215 void irias_insert_object(struct ias_object *obj)
217 IRDA_ASSERT(obj != NULL, return;);
218 IRDA_ASSERT(obj->magic == IAS_OBJECT_MAGIC, return;);
220 hashbin_insert(irias_objects, (irda_queue_t *) obj, 0, obj->name);
222 EXPORT_SYMBOL(irias_insert_object);
225 * Function irias_find_object (name)
227 * Find object with given name
230 struct ias_object *irias_find_object(char *name)
232 IRDA_ASSERT(name != NULL, return NULL;);
234 /* Unsafe (locking), object might change */
235 return hashbin_lock_find(irias_objects, 0, name);
237 EXPORT_SYMBOL(irias_find_object);
240 * Function irias_find_attrib (obj, name)
242 * Find named attribute in object
245 struct ias_attrib *irias_find_attrib(struct ias_object *obj, char *name)
247 struct ias_attrib *attrib;
249 IRDA_ASSERT(obj != NULL, return NULL;);
250 IRDA_ASSERT(obj->magic == IAS_OBJECT_MAGIC, return NULL;);
251 IRDA_ASSERT(name != NULL, return NULL;);
253 attrib = hashbin_lock_find(obj->attribs, 0, name);
257 /* Unsafe (locking), attrib might change */
260 EXPORT_SYMBOL(irias_find_attrib);
263 * Function irias_add_attribute (obj, attrib)
265 * Add attribute to object
268 static void irias_add_attrib(struct ias_object *obj, struct ias_attrib *attrib,
271 IRDA_ASSERT(obj != NULL, return;);
272 IRDA_ASSERT(obj->magic == IAS_OBJECT_MAGIC, return;);
274 IRDA_ASSERT(attrib != NULL, return;);
275 IRDA_ASSERT(attrib->magic == IAS_ATTRIB_MAGIC, return;);
277 /* Set if attrib is owned by kernel or user space */
278 attrib->value->owner = owner;
280 hashbin_insert(obj->attribs, (irda_queue_t *) attrib, 0, attrib->name);
284 * Function irias_object_change_attribute (obj_name, attrib_name, new_value)
286 * Change the value of an objects attribute.
289 int irias_object_change_attribute(char *obj_name, char *attrib_name,
290 struct ias_value *new_value)
292 struct ias_object *obj;
293 struct ias_attrib *attrib;
297 obj = hashbin_lock_find(irias_objects, 0, obj_name);
299 IRDA_WARNING("%s: Unable to find object: %s\n", __FUNCTION__,
304 /* Slightly unsafe (obj might get removed under us) */
305 spin_lock_irqsave(&obj->attribs->hb_spinlock, flags);
308 attrib = hashbin_find(obj->attribs, 0, attrib_name);
309 if (attrib == NULL) {
310 IRDA_WARNING("%s: Unable to find attribute: %s\n",
311 __FUNCTION__, attrib_name);
312 spin_unlock_irqrestore(&obj->attribs->hb_spinlock, flags);
316 if ( attrib->value->type != new_value->type) {
317 IRDA_DEBUG( 0, "%s(), changing value type not allowed!\n",
319 spin_unlock_irqrestore(&obj->attribs->hb_spinlock, flags);
323 /* Delete old value */
324 irias_delete_value(attrib->value);
326 /* Insert new value */
327 attrib->value = new_value;
330 spin_unlock_irqrestore(&obj->attribs->hb_spinlock, flags);
333 EXPORT_SYMBOL(irias_object_change_attribute);
336 * Function irias_object_add_integer_attrib (obj, name, value)
338 * Add an integer attribute to an LM-IAS object
341 void irias_add_integer_attrib(struct ias_object *obj, char *name, int value,
344 struct ias_attrib *attrib;
346 IRDA_ASSERT(obj != NULL, return;);
347 IRDA_ASSERT(obj->magic == IAS_OBJECT_MAGIC, return;);
348 IRDA_ASSERT(name != NULL, return;);
350 attrib = kmalloc(sizeof(struct ias_attrib), GFP_ATOMIC);
351 if (attrib == NULL) {
352 IRDA_WARNING("%s: Unable to allocate attribute!\n",
356 memset(attrib, 0, sizeof( struct ias_attrib));
358 attrib->magic = IAS_ATTRIB_MAGIC;
359 attrib->name = strndup(name, IAS_MAX_ATTRIBNAME);
362 attrib->value = irias_new_integer_value(value);
364 irias_add_attrib(obj, attrib, owner);
366 EXPORT_SYMBOL(irias_add_integer_attrib);
369 * Function irias_add_octseq_attrib (obj, name, octet_seq, len)
371 * Add a octet sequence attribute to an LM-IAS object
375 void irias_add_octseq_attrib(struct ias_object *obj, char *name, __u8 *octets,
378 struct ias_attrib *attrib;
380 IRDA_ASSERT(obj != NULL, return;);
381 IRDA_ASSERT(obj->magic == IAS_OBJECT_MAGIC, return;);
383 IRDA_ASSERT(name != NULL, return;);
384 IRDA_ASSERT(octets != NULL, return;);
386 attrib = kmalloc(sizeof(struct ias_attrib), GFP_ATOMIC);
387 if (attrib == NULL) {
388 IRDA_WARNING("%s: Unable to allocate attribute!\n",
392 memset(attrib, 0, sizeof( struct ias_attrib));
394 attrib->magic = IAS_ATTRIB_MAGIC;
395 attrib->name = strndup(name, IAS_MAX_ATTRIBNAME);
397 attrib->value = irias_new_octseq_value( octets, len);
399 irias_add_attrib(obj, attrib, owner);
401 EXPORT_SYMBOL(irias_add_octseq_attrib);
404 * Function irias_object_add_string_attrib (obj, string)
406 * Add a string attribute to an LM-IAS object
409 void irias_add_string_attrib(struct ias_object *obj, char *name, char *value,
412 struct ias_attrib *attrib;
414 IRDA_ASSERT(obj != NULL, return;);
415 IRDA_ASSERT(obj->magic == IAS_OBJECT_MAGIC, return;);
417 IRDA_ASSERT(name != NULL, return;);
418 IRDA_ASSERT(value != NULL, return;);
420 attrib = kmalloc(sizeof( struct ias_attrib), GFP_ATOMIC);
421 if (attrib == NULL) {
422 IRDA_WARNING("%s: Unable to allocate attribute!\n",
426 memset(attrib, 0, sizeof( struct ias_attrib));
428 attrib->magic = IAS_ATTRIB_MAGIC;
429 attrib->name = strndup(name, IAS_MAX_ATTRIBNAME);
431 attrib->value = irias_new_string_value(value);
433 irias_add_attrib(obj, attrib, owner);
435 EXPORT_SYMBOL(irias_add_string_attrib);
438 * Function irias_new_integer_value (integer)
440 * Create new IAS integer value
443 struct ias_value *irias_new_integer_value(int integer)
445 struct ias_value *value;
447 value = kmalloc(sizeof(struct ias_value), GFP_ATOMIC);
449 IRDA_WARNING("%s: Unable to kmalloc!\n", __FUNCTION__);
452 memset(value, 0, sizeof(struct ias_value));
454 value->type = IAS_INTEGER;
456 value->t.integer = integer;
460 EXPORT_SYMBOL(irias_new_integer_value);
463 * Function irias_new_string_value (string)
465 * Create new IAS string value
467 * Per IrLMP 1.1, 4.3.3.2, strings are up to 256 chars - Jean II
469 struct ias_value *irias_new_string_value(char *string)
471 struct ias_value *value;
473 value = kmalloc(sizeof(struct ias_value), GFP_ATOMIC);
475 IRDA_WARNING("%s: Unable to kmalloc!\n", __FUNCTION__);
478 memset( value, 0, sizeof( struct ias_value));
480 value->type = IAS_STRING;
481 value->charset = CS_ASCII;
482 value->t.string = strndup(string, IAS_MAX_STRING);
483 value->len = strlen(value->t.string);
487 EXPORT_SYMBOL(irias_new_string_value);
490 * Function irias_new_octseq_value (octets, len)
492 * Create new IAS octet-sequence value
494 * Per IrLMP 1.1, 4.3.3.2, octet-sequence are up to 1024 bytes - Jean II
496 struct ias_value *irias_new_octseq_value(__u8 *octseq , int len)
498 struct ias_value *value;
500 value = kmalloc(sizeof(struct ias_value), GFP_ATOMIC);
502 IRDA_WARNING("%s: Unable to kmalloc!\n", __FUNCTION__);
505 memset(value, 0, sizeof(struct ias_value));
507 value->type = IAS_OCT_SEQ;
509 if(len > IAS_MAX_OCTET_STRING)
510 len = IAS_MAX_OCTET_STRING;
513 value->t.oct_seq = kmalloc(len, GFP_ATOMIC);
514 if (value->t.oct_seq == NULL){
515 IRDA_WARNING("%s: Unable to kmalloc!\n", __FUNCTION__);
519 memcpy(value->t.oct_seq, octseq , len);
522 EXPORT_SYMBOL(irias_new_octseq_value);
524 struct ias_value *irias_new_missing_value(void)
526 struct ias_value *value;
528 value = kmalloc(sizeof(struct ias_value), GFP_ATOMIC);
530 IRDA_WARNING("%s: Unable to kmalloc!\n", __FUNCTION__);
533 memset(value, 0, sizeof(struct ias_value));
535 value->type = IAS_MISSING;
542 * Function irias_delete_value (value)
547 void irias_delete_value(struct ias_value *value)
549 IRDA_DEBUG(4, "%s()\n", __FUNCTION__);
551 IRDA_ASSERT(value != NULL, return;);
553 switch (value->type) {
554 case IAS_INTEGER: /* Fallthrough */
556 /* No need to deallocate */
559 /* Deallocate string */
560 kfree(value->t.string);
563 /* Deallocate byte stream */
564 kfree(value->t.oct_seq);
567 IRDA_DEBUG(0, "%s(), Unknown value type!\n", __FUNCTION__);
572 EXPORT_SYMBOL(irias_delete_value);