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 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 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 WARNING("%s(), Unable to allocate attribs!\n", __FUNCTION__);
111 EXPORT_SYMBOL(irias_new_object);
114 * Function irias_delete_attrib (attrib)
116 * Delete given attribute and deallocate all its memory
119 void __irias_delete_attrib(struct ias_attrib *attrib)
121 ASSERT(attrib != NULL, return;);
122 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 ASSERT(obj != NULL, return;);
136 ASSERT(obj->magic == IAS_OBJECT_MAGIC, return;);
141 hashbin_delete(obj->attribs, (FREE_FUNC) __irias_delete_attrib);
143 obj->magic = ~IAS_OBJECT_MAGIC;
149 * Function irias_delete_object (obj)
151 * Remove object from hashbin and deallocate all attributes associated with
152 * with this object and the object itself
155 int irias_delete_object(struct ias_object *obj)
157 struct ias_object *node;
159 ASSERT(obj != NULL, return -1;);
160 ASSERT(obj->magic == IAS_OBJECT_MAGIC, return -1;);
162 node = hashbin_remove_this(irias_objects, (irda_queue_t *) obj);
164 return 0; /* Already removed */
166 __irias_delete_object(node);
170 EXPORT_SYMBOL(irias_delete_object);
173 * Function irias_delete_attrib (obj)
175 * Remove attribute from hashbin and, if it was the last attribute of
176 * the object, remove the object as well.
179 int irias_delete_attrib(struct ias_object *obj, struct ias_attrib *attrib)
181 struct ias_attrib *node;
183 ASSERT(obj != NULL, return -1;);
184 ASSERT(obj->magic == IAS_OBJECT_MAGIC, return -1;);
185 ASSERT(attrib != NULL, return -1;);
187 /* Remove attribute from object */
188 node = hashbin_remove_this(obj->attribs, (irda_queue_t *) attrib);
190 return 0; /* Already removed or non-existent */
192 /* Deallocate attribute */
193 __irias_delete_attrib(node);
195 /* Check if object has still some attributes */
196 node = (struct ias_attrib *) hashbin_get_first(obj->attribs);
198 irias_delete_object(obj);
204 * Function irias_insert_object (obj)
206 * Insert an object into the LM-IAS database
209 void irias_insert_object(struct ias_object *obj)
211 ASSERT(obj != NULL, return;);
212 ASSERT(obj->magic == IAS_OBJECT_MAGIC, return;);
214 hashbin_insert(irias_objects, (irda_queue_t *) obj, 0, obj->name);
216 EXPORT_SYMBOL(irias_insert_object);
219 * Function irias_find_object (name)
221 * Find object with given name
224 struct ias_object *irias_find_object(char *name)
226 ASSERT(name != NULL, return NULL;);
228 /* Unsafe (locking), object might change */
229 return hashbin_lock_find(irias_objects, 0, name);
231 EXPORT_SYMBOL(irias_find_object);
234 * Function irias_find_attrib (obj, name)
236 * Find named attribute in object
239 struct ias_attrib *irias_find_attrib(struct ias_object *obj, char *name)
241 struct ias_attrib *attrib;
243 ASSERT(obj != NULL, return NULL;);
244 ASSERT(obj->magic == IAS_OBJECT_MAGIC, return NULL;);
245 ASSERT(name != NULL, return NULL;);
247 attrib = hashbin_lock_find(obj->attribs, 0, name);
251 /* Unsafe (locking), attrib might change */
254 EXPORT_SYMBOL(irias_find_attrib);
257 * Function irias_add_attribute (obj, attrib)
259 * Add attribute to object
262 void irias_add_attrib( struct ias_object *obj, struct ias_attrib *attrib,
265 ASSERT(obj != NULL, return;);
266 ASSERT(obj->magic == IAS_OBJECT_MAGIC, return;);
268 ASSERT(attrib != NULL, return;);
269 ASSERT(attrib->magic == IAS_ATTRIB_MAGIC, return;);
271 /* Set if attrib is owned by kernel or user space */
272 attrib->value->owner = owner;
274 hashbin_insert(obj->attribs, (irda_queue_t *) attrib, 0, attrib->name);
278 * Function irias_object_change_attribute (obj_name, attrib_name, new_value)
280 * Change the value of an objects attribute.
283 int irias_object_change_attribute(char *obj_name, char *attrib_name,
284 struct ias_value *new_value)
286 struct ias_object *obj;
287 struct ias_attrib *attrib;
291 obj = hashbin_lock_find(irias_objects, 0, obj_name);
293 WARNING("%s: Unable to find object: %s\n", __FUNCTION__,
298 /* Slightly unsafe (obj might get removed under us) */
299 spin_lock_irqsave(&obj->attribs->hb_spinlock, flags);
302 attrib = hashbin_find(obj->attribs, 0, attrib_name);
303 if (attrib == NULL) {
304 WARNING("%s: Unable to find attribute: %s\n", __FUNCTION__,
306 spin_unlock_irqrestore(&obj->attribs->hb_spinlock, flags);
310 if ( attrib->value->type != new_value->type) {
311 IRDA_DEBUG( 0, "%s(), changing value type not allowed!\n",
313 spin_unlock_irqrestore(&obj->attribs->hb_spinlock, flags);
317 /* Delete old value */
318 irias_delete_value(attrib->value);
320 /* Insert new value */
321 attrib->value = new_value;
324 spin_unlock_irqrestore(&obj->attribs->hb_spinlock, flags);
327 EXPORT_SYMBOL(irias_object_change_attribute);
330 * Function irias_object_add_integer_attrib (obj, name, value)
332 * Add an integer attribute to an LM-IAS object
335 void irias_add_integer_attrib(struct ias_object *obj, char *name, int value,
338 struct ias_attrib *attrib;
340 ASSERT(obj != NULL, return;);
341 ASSERT(obj->magic == IAS_OBJECT_MAGIC, return;);
342 ASSERT(name != NULL, return;);
344 attrib = (struct ias_attrib *) kmalloc(sizeof(struct ias_attrib),
346 if (attrib == NULL) {
347 WARNING("%s: Unable to allocate attribute!\n", __FUNCTION__);
350 memset(attrib, 0, sizeof( struct ias_attrib));
352 attrib->magic = IAS_ATTRIB_MAGIC;
353 attrib->name = strndup(name, IAS_MAX_ATTRIBNAME);
356 attrib->value = irias_new_integer_value(value);
358 irias_add_attrib(obj, attrib, owner);
360 EXPORT_SYMBOL(irias_add_integer_attrib);
363 * Function irias_add_octseq_attrib (obj, name, octet_seq, len)
365 * Add a octet sequence attribute to an LM-IAS object
369 void irias_add_octseq_attrib(struct ias_object *obj, char *name, __u8 *octets,
372 struct ias_attrib *attrib;
374 ASSERT(obj != NULL, return;);
375 ASSERT(obj->magic == IAS_OBJECT_MAGIC, return;);
377 ASSERT(name != NULL, return;);
378 ASSERT(octets != NULL, return;);
380 attrib = (struct ias_attrib *) kmalloc(sizeof(struct ias_attrib),
382 if (attrib == NULL) {
383 WARNING("%s: Unable to allocate attribute!\n", __FUNCTION__);
386 memset(attrib, 0, sizeof( struct ias_attrib));
388 attrib->magic = IAS_ATTRIB_MAGIC;
389 attrib->name = strndup(name, IAS_MAX_ATTRIBNAME);
391 attrib->value = irias_new_octseq_value( octets, len);
393 irias_add_attrib(obj, attrib, owner);
395 EXPORT_SYMBOL(irias_add_octseq_attrib);
398 * Function irias_object_add_string_attrib (obj, string)
400 * Add a string attribute to an LM-IAS object
403 void irias_add_string_attrib(struct ias_object *obj, char *name, char *value,
406 struct ias_attrib *attrib;
408 ASSERT(obj != NULL, return;);
409 ASSERT(obj->magic == IAS_OBJECT_MAGIC, return;);
411 ASSERT(name != NULL, return;);
412 ASSERT(value != NULL, return;);
414 attrib = (struct ias_attrib *) kmalloc(sizeof( struct ias_attrib),
416 if (attrib == NULL) {
417 WARNING("%s: Unable to allocate attribute!\n", __FUNCTION__);
420 memset(attrib, 0, sizeof( struct ias_attrib));
422 attrib->magic = IAS_ATTRIB_MAGIC;
423 attrib->name = strndup(name, IAS_MAX_ATTRIBNAME);
425 attrib->value = irias_new_string_value(value);
427 irias_add_attrib(obj, attrib, owner);
429 EXPORT_SYMBOL(irias_add_string_attrib);
432 * Function irias_new_integer_value (integer)
434 * Create new IAS integer value
437 struct ias_value *irias_new_integer_value(int integer)
439 struct ias_value *value;
441 value = kmalloc(sizeof(struct ias_value), GFP_ATOMIC);
443 WARNING("%s: Unable to kmalloc!\n", __FUNCTION__);
446 memset(value, 0, sizeof(struct ias_value));
448 value->type = IAS_INTEGER;
450 value->t.integer = integer;
454 EXPORT_SYMBOL(irias_new_integer_value);
457 * Function irias_new_string_value (string)
459 * Create new IAS string value
461 * Per IrLMP 1.1, 4.3.3.2, strings are up to 256 chars - Jean II
463 struct ias_value *irias_new_string_value(char *string)
465 struct ias_value *value;
467 value = kmalloc(sizeof(struct ias_value), GFP_ATOMIC);
469 WARNING("%s: Unable to kmalloc!\n", __FUNCTION__);
472 memset( value, 0, sizeof( struct ias_value));
474 value->type = IAS_STRING;
475 value->charset = CS_ASCII;
476 value->t.string = strndup(string, IAS_MAX_STRING);
477 value->len = strlen(value->t.string);
481 EXPORT_SYMBOL(irias_new_string_value);
484 * Function irias_new_octseq_value (octets, len)
486 * Create new IAS octet-sequence value
488 * Per IrLMP 1.1, 4.3.3.2, octet-sequence are up to 1024 bytes - Jean II
490 struct ias_value *irias_new_octseq_value(__u8 *octseq , int len)
492 struct ias_value *value;
494 value = kmalloc(sizeof(struct ias_value), GFP_ATOMIC);
496 WARNING("%s: Unable to kmalloc!\n", __FUNCTION__);
499 memset(value, 0, sizeof(struct ias_value));
501 value->type = IAS_OCT_SEQ;
503 if(len > IAS_MAX_OCTET_STRING)
504 len = IAS_MAX_OCTET_STRING;
507 value->t.oct_seq = kmalloc(len, GFP_ATOMIC);
508 if (value->t.oct_seq == NULL){
509 WARNING("%s: Unable to kmalloc!\n", __FUNCTION__);
513 memcpy(value->t.oct_seq, octseq , len);
516 EXPORT_SYMBOL(irias_new_octseq_value);
518 struct ias_value *irias_new_missing_value(void)
520 struct ias_value *value;
522 value = kmalloc(sizeof(struct ias_value), GFP_ATOMIC);
524 WARNING("%s: Unable to kmalloc!\n", __FUNCTION__);
527 memset(value, 0, sizeof(struct ias_value));
529 value->type = IAS_MISSING;
536 * Function irias_delete_value (value)
541 void irias_delete_value(struct ias_value *value)
543 IRDA_DEBUG(4, "%s()\n", __FUNCTION__);
545 ASSERT(value != NULL, return;);
547 switch (value->type) {
548 case IAS_INTEGER: /* Fallthrough */
550 /* No need to deallocate */
553 /* If string, deallocate string */
554 if (value->t.string != NULL)
555 kfree(value->t.string);
558 /* If byte stream, deallocate byte stream */
559 if (value->t.oct_seq != NULL)
560 kfree(value->t.oct_seq);
563 IRDA_DEBUG(0, "%s(), Unknown value type!\n", __FUNCTION__);
568 EXPORT_SYMBOL(irias_delete_value);