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Merge tag 'gpio-v3.13-3' of git://git.kernel.org/pub/scm/linux/kernel/git/linusw...
[linux-2.6.git] / net / irda / iriap.c
blobe1b37f5a2691f7a79052f9b840aa0f9910182698
1 /*********************************************************************
2 *
3 * Filename: iriap.c
4 * Version: 0.8
5 * Description: Information Access Protocol (IAP)
6 * Status: Experimental.
7 * Author: Dag Brattli <dagb@cs.uit.no>
8 * Created at: Thu Aug 21 00:02:07 1997
9 * Modified at: Sat Dec 25 16:42:42 1999
10 * Modified by: Dag Brattli <dagb@cs.uit.no>
11 *
12 * Copyright (c) 1998-1999 Dag Brattli <dagb@cs.uit.no>,
13 * All Rights Reserved.
14 * Copyright (c) 2000-2003 Jean Tourrilhes <jt@hpl.hp.com>
15 *
16 * This program is free software; you can redistribute it and/or
17 * modify it under the terms of the GNU General Public License as
18 * published by the Free Software Foundation; either version 2 of
19 * the License, or (at your option) any later version.
20 *
21 * Neither Dag Brattli nor University of Tromsø admit liability nor
22 * provide warranty for any of this software. This material is
23 * provided "AS-IS" and at no charge.
24 *
25 ********************************************************************/
26
27 #include <linux/module.h>
28 #include <linux/types.h>
29 #include <linux/skbuff.h>
30 #include <linux/fs.h>
31 #include <linux/string.h>
32 #include <linux/init.h>
33 #include <linux/seq_file.h>
34 #include <linux/slab.h>
35
36 #include <asm/byteorder.h>
37 #include <asm/unaligned.h>
38
39 #include <net/irda/irda.h>
40 #include <net/irda/irttp.h>
41 #include <net/irda/irlmp.h>
42 #include <net/irda/irias_object.h>
43 #include <net/irda/iriap_event.h>
44 #include <net/irda/iriap.h>
45
46 #ifdef CONFIG_IRDA_DEBUG
47 /* FIXME: This one should go in irlmp.c */
48 static const char *const ias_charset_types[] = {
49 "CS_ASCII",
50 "CS_ISO_8859_1",
51 "CS_ISO_8859_2",
52 "CS_ISO_8859_3",
53 "CS_ISO_8859_4",
54 "CS_ISO_8859_5",
55 "CS_ISO_8859_6",
56 "CS_ISO_8859_7",
57 "CS_ISO_8859_8",
58 "CS_ISO_8859_9",
59 "CS_UNICODE"
60 };
61 #endif /* CONFIG_IRDA_DEBUG */
62
63 static hashbin_t *iriap = NULL;
64 static void *service_handle;
65
66 static void __iriap_close(struct iriap_cb *self);
67 static int iriap_register_lsap(struct iriap_cb *self, __u8 slsap_sel, int mode);
68 static void iriap_disconnect_indication(void *instance, void *sap,
69 LM_REASON reason, struct sk_buff *skb);
70 static void iriap_connect_indication(void *instance, void *sap,
71 struct qos_info *qos, __u32 max_sdu_size,
72 __u8 max_header_size,
73 struct sk_buff *skb);
74 static void iriap_connect_confirm(void *instance, void *sap,
75 struct qos_info *qos,
76 __u32 max_sdu_size, __u8 max_header_size,
77 struct sk_buff *skb);
78 static int iriap_data_indication(void *instance, void *sap,
79 struct sk_buff *skb);
80
81 static void iriap_watchdog_timer_expired(void *data);
82
83 static inline void iriap_start_watchdog_timer(struct iriap_cb *self,
84 int timeout)
85 {
86 irda_start_timer(&self->watchdog_timer, timeout, self,
87 iriap_watchdog_timer_expired);
88 }
89
90 static struct lock_class_key irias_objects_key;
91
92 /*
93 * Function iriap_init (void)
94 *
95 * Initializes the IrIAP layer, called by the module initialization code
96 * in irmod.c
97 */
98 int __init iriap_init(void)
99 {
100 struct ias_object *obj;
101 struct iriap_cb *server;
102 __u8 oct_seq[6];
103 __u16 hints;
104
105 /* Allocate master array */
106 iriap = hashbin_new(HB_LOCK);
107 if (!iriap)
108 return -ENOMEM;
109
110 /* Object repository - defined in irias_object.c */
111 irias_objects = hashbin_new(HB_LOCK);
112 if (!irias_objects) {
113 IRDA_WARNING("%s: Can't allocate irias_objects hashbin!\n",
114 __func__);
115 hashbin_delete(iriap, NULL);
116 return -ENOMEM;
117 }
118
119 lockdep_set_class_and_name(&irias_objects->hb_spinlock, &irias_objects_key,
120 "irias_objects");
121
122 /*
123 * Register some default services for IrLMP
124 */
125 hints = irlmp_service_to_hint(S_COMPUTER);
126 service_handle = irlmp_register_service(hints);
127
128 /* Register the Device object with LM-IAS */
129 obj = irias_new_object("Device", IAS_DEVICE_ID);
130 irias_add_string_attrib(obj, "DeviceName", "Linux", IAS_KERNEL_ATTR);
131
132 oct_seq[0] = 0x01; /* Version 1 */
133 oct_seq[1] = 0x00; /* IAS support bits */
134 oct_seq[2] = 0x00; /* LM-MUX support bits */
135 #ifdef CONFIG_IRDA_ULTRA
136 oct_seq[2] |= 0x04; /* Connectionless Data support */
137 #endif
138 irias_add_octseq_attrib(obj, "IrLMPSupport", oct_seq, 3,
139 IAS_KERNEL_ATTR);
140 irias_insert_object(obj);
141
142 /*
143 * Register server support with IrLMP so we can accept incoming
144 * connections
145 */
146 server = iriap_open(LSAP_IAS, IAS_SERVER, NULL, NULL);
147 if (!server) {
148 IRDA_DEBUG(0, "%s(), unable to open server\n", __func__);
149 return -1;
150 }
151 iriap_register_lsap(server, LSAP_IAS, IAS_SERVER);
152
153 return 0;
154 }
155
156 /*
157 * Function iriap_cleanup (void)
158 *
159 * Initializes the IrIAP layer, called by the module cleanup code in
160 * irmod.c
161 */
162 void iriap_cleanup(void)
163 {
164 irlmp_unregister_service(service_handle);
165
166 hashbin_delete(iriap, (FREE_FUNC) __iriap_close);
167 hashbin_delete(irias_objects, (FREE_FUNC) __irias_delete_object);
168 }
169
170 /*
171 * Function iriap_open (void)
172 *
173 * Opens an instance of the IrIAP layer, and registers with IrLMP
174 */
175 struct iriap_cb *iriap_open(__u8 slsap_sel, int mode, void *priv,
176 CONFIRM_CALLBACK callback)
177 {
178 struct iriap_cb *self;
179
180 IRDA_DEBUG(2, "%s()\n", __func__);
181
182 self = kzalloc(sizeof(*self), GFP_ATOMIC);
183 if (!self) {
184 IRDA_WARNING("%s: Unable to kmalloc!\n", __func__);
185 return NULL;
186 }
187
188 /*
189 * Initialize instance
190 */
191
192 self->magic = IAS_MAGIC;
193 self->mode = mode;
194 if (mode == IAS_CLIENT)
195 iriap_register_lsap(self, slsap_sel, mode);
196
197 self->confirm = callback;
198 self->priv = priv;
199
200 /* iriap_getvaluebyclass_request() will construct packets before
201 * we connect, so this must have a sane value... Jean II */
202 self->max_header_size = LMP_MAX_HEADER;
203
204 init_timer(&self->watchdog_timer);
205
206 hashbin_insert(iriap, (irda_queue_t *) self, (long) self, NULL);
207
208 /* Initialize state machines */
209 iriap_next_client_state(self, S_DISCONNECT);
210 iriap_next_call_state(self, S_MAKE_CALL);
211 iriap_next_server_state(self, R_DISCONNECT);
212 iriap_next_r_connect_state(self, R_WAITING);
213
214 return self;
215 }
216 EXPORT_SYMBOL(iriap_open);
217
218 /*
219 * Function __iriap_close (self)
220 *
221 * Removes (deallocates) the IrIAP instance
222 *
223 */
224 static void __iriap_close(struct iriap_cb *self)
225 {
226 IRDA_DEBUG(4, "%s()\n", __func__);
227
228 IRDA_ASSERT(self != NULL, return;);
229 IRDA_ASSERT(self->magic == IAS_MAGIC, return;);
230
231 del_timer(&self->watchdog_timer);
232
233 if (self->request_skb)
234 dev_kfree_skb(self->request_skb);
235
236 self->magic = 0;
237
238 kfree(self);
239 }
240
241 /*
242 * Function iriap_close (void)
243 *
244 * Closes IrIAP and deregisters with IrLMP
245 */
246 void iriap_close(struct iriap_cb *self)
247 {
248 struct iriap_cb *entry;
249
250 IRDA_DEBUG(2, "%s()\n", __func__);
251
252 IRDA_ASSERT(self != NULL, return;);
253 IRDA_ASSERT(self->magic == IAS_MAGIC, return;);
254
255 if (self->lsap) {
256 irlmp_close_lsap(self->lsap);
257 self->lsap = NULL;
258 }
259
260 entry = (struct iriap_cb *) hashbin_remove(iriap, (long) self, NULL);
261 IRDA_ASSERT(entry == self, return;);
262
263 __iriap_close(self);
264 }
265 EXPORT_SYMBOL(iriap_close);
266
267 static int iriap_register_lsap(struct iriap_cb *self, __u8 slsap_sel, int mode)
268 {
269 notify_t notify;
270
271 IRDA_DEBUG(2, "%s()\n", __func__);
272
273 irda_notify_init(&notify);
274 notify.connect_confirm = iriap_connect_confirm;
275 notify.connect_indication = iriap_connect_indication;
276 notify.disconnect_indication = iriap_disconnect_indication;
277 notify.data_indication = iriap_data_indication;
278 notify.instance = self;
279 if (mode == IAS_CLIENT)
280 strcpy(notify.name, "IrIAS cli");
281 else
282 strcpy(notify.name, "IrIAS srv");
283
284 self->lsap = irlmp_open_lsap(slsap_sel, &notify, 0);
285 if (self->lsap == NULL) {
286 IRDA_ERROR("%s: Unable to allocated LSAP!\n", __func__);
287 return -1;
288 }
289 self->slsap_sel = self->lsap->slsap_sel;
290
291 return 0;
292 }
293
294 /*
295 * Function iriap_disconnect_indication (handle, reason)
296 *
297 * Got disconnect, so clean up everything associated with this connection
298 *
299 */
300 static void iriap_disconnect_indication(void *instance, void *sap,
301 LM_REASON reason,
302 struct sk_buff *skb)
303 {
304 struct iriap_cb *self;
305
306 IRDA_DEBUG(4, "%s(), reason=%s [%d]\n", __func__,
307 irlmp_reason_str(reason), reason);
308
309 self = instance;
310
311 IRDA_ASSERT(self != NULL, return;);
312 IRDA_ASSERT(self->magic == IAS_MAGIC, return;);
313
314 IRDA_ASSERT(iriap != NULL, return;);
315
316 del_timer(&self->watchdog_timer);
317
318 /* Not needed */
319 if (skb)
320 dev_kfree_skb(skb);
321
322 if (self->mode == IAS_CLIENT) {
323 IRDA_DEBUG(4, "%s(), disconnect as client\n", __func__);
324
325
326 iriap_do_client_event(self, IAP_LM_DISCONNECT_INDICATION,
327 NULL);
328 /*
329 * Inform service user that the request failed by sending
330 * it a NULL value. Warning, the client might close us, so
331 * remember no to use self anymore after calling confirm
332 */
333 if (self->confirm)
334 self->confirm(IAS_DISCONNECT, 0, NULL, self->priv);
335 } else {
336 IRDA_DEBUG(4, "%s(), disconnect as server\n", __func__);
337 iriap_do_server_event(self, IAP_LM_DISCONNECT_INDICATION,
338 NULL);
339 iriap_close(self);
340 }
341 }
342
343 /*
344 * Function iriap_disconnect_request (handle)
345 */
346 static void iriap_disconnect_request(struct iriap_cb *self)
347 {
348 struct sk_buff *tx_skb;
349
350 IRDA_DEBUG(4, "%s()\n", __func__);
351
352 IRDA_ASSERT(self != NULL, return;);
353 IRDA_ASSERT(self->magic == IAS_MAGIC, return;);
354
355 tx_skb = alloc_skb(LMP_MAX_HEADER, GFP_ATOMIC);
356 if (tx_skb == NULL) {
357 IRDA_DEBUG(0,
358 "%s(), Could not allocate an sk_buff of length %d\n",
359 __func__, LMP_MAX_HEADER);
360 return;
361 }
362
363 /*
364 * Reserve space for MUX control and LAP header
365 */
366 skb_reserve(tx_skb, LMP_MAX_HEADER);
367
368 irlmp_disconnect_request(self->lsap, tx_skb);
369 }
370
371 /*
372 * Function iriap_getvaluebyclass (addr, name, attr)
373 *
374 * Retrieve all values from attribute in all objects with given class
375 * name
376 */
377 int iriap_getvaluebyclass_request(struct iriap_cb *self,
378 __u32 saddr, __u32 daddr,
379 char *name, char *attr)
380 {
381 struct sk_buff *tx_skb;
382 int name_len, attr_len, skb_len;
383 __u8 *frame;
384
385 IRDA_ASSERT(self != NULL, return -1;);
386 IRDA_ASSERT(self->magic == IAS_MAGIC, return -1;);
387
388 /* Client must supply the destination device address */
389 if (!daddr)
390 return -1;
391
392 self->daddr = daddr;
393 self->saddr = saddr;
394
395 /*
396 * Save operation, so we know what the later indication is about
397 */
398 self->operation = GET_VALUE_BY_CLASS;
399
400 /* Give ourselves 10 secs to finish this operation */
401 iriap_start_watchdog_timer(self, 10*HZ);
402
403 name_len = strlen(name); /* Up to IAS_MAX_CLASSNAME = 60 */
404 attr_len = strlen(attr); /* Up to IAS_MAX_ATTRIBNAME = 60 */
405
406 skb_len = self->max_header_size+2+name_len+1+attr_len+4;
407 tx_skb = alloc_skb(skb_len, GFP_ATOMIC);
408 if (!tx_skb)
409 return -ENOMEM;
410
411 /* Reserve space for MUX and LAP header */
412 skb_reserve(tx_skb, self->max_header_size);
413 skb_put(tx_skb, 3+name_len+attr_len);
414 frame = tx_skb->data;
415
416 /* Build frame */
417 frame[0] = IAP_LST | GET_VALUE_BY_CLASS;
418 frame[1] = name_len; /* Insert length of name */
419 memcpy(frame+2, name, name_len); /* Insert name */
420 frame[2+name_len] = attr_len; /* Insert length of attr */
421 memcpy(frame+3+name_len, attr, attr_len); /* Insert attr */
422
423 iriap_do_client_event(self, IAP_CALL_REQUEST_GVBC, tx_skb);
424
425 /* Drop reference count - see state_s_disconnect(). */
426 dev_kfree_skb(tx_skb);
427
428 return 0;
429 }
430 EXPORT_SYMBOL(iriap_getvaluebyclass_request);
431
432 /*
433 * Function iriap_getvaluebyclass_confirm (self, skb)
434 *
435 * Got result from GetValueByClass command. Parse it and return result
436 * to service user.
437 *
438 */
439 static void iriap_getvaluebyclass_confirm(struct iriap_cb *self,
440 struct sk_buff *skb)
441 {
442 struct ias_value *value;
443 int charset;
444 __u32 value_len;
445 __u32 tmp_cpu32;
446 __u16 obj_id;
447 __u16 len;
448 __u8 type;
449 __u8 *fp;
450 int n;
451
452 IRDA_ASSERT(self != NULL, return;);
453 IRDA_ASSERT(self->magic == IAS_MAGIC, return;);
454 IRDA_ASSERT(skb != NULL, return;);
455
456 /* Initialize variables */
457 fp = skb->data;
458 n = 2;
459
460 /* Get length, MSB first */
461 len = get_unaligned_be16(fp + n);
462 n += 2;
463
464 IRDA_DEBUG(4, "%s(), len=%d\n", __func__, len);
465
466 /* Get object ID, MSB first */
467 obj_id = get_unaligned_be16(fp + n);
468 n += 2;
469
470 type = fp[n++];
471 IRDA_DEBUG(4, "%s(), Value type = %d\n", __func__, type);
472
473 switch (type) {
474 case IAS_INTEGER:
475 memcpy(&tmp_cpu32, fp+n, 4); n += 4;
476 be32_to_cpus(&tmp_cpu32);
477 value = irias_new_integer_value(tmp_cpu32);
478
479 /* Legal values restricted to 0x01-0x6f, page 15 irttp */
480 IRDA_DEBUG(4, "%s(), lsap=%d\n", __func__, value->t.integer);
481 break;
482 case IAS_STRING:
483 charset = fp[n++];
484
485 switch (charset) {
486 case CS_ASCII:
487 break;
488 /* case CS_ISO_8859_1: */
489 /* case CS_ISO_8859_2: */
490 /* case CS_ISO_8859_3: */
491 /* case CS_ISO_8859_4: */
492 /* case CS_ISO_8859_5: */
493 /* case CS_ISO_8859_6: */
494 /* case CS_ISO_8859_7: */
495 /* case CS_ISO_8859_8: */
496 /* case CS_ISO_8859_9: */
497 /* case CS_UNICODE: */
498 default:
499 IRDA_DEBUG(0, "%s(), charset [%d] %s, not supported\n",
500 __func__, charset,
501 charset < ARRAY_SIZE(ias_charset_types) ?
502 ias_charset_types[charset] :
503 "(unknown)");
504
505 /* Aborting, close connection! */
506 iriap_disconnect_request(self);
507 return;
508 /* break; */
509 }
510 value_len = fp[n++];
511 IRDA_DEBUG(4, "%s(), strlen=%d\n", __func__, value_len);
512
513 /* Make sure the string is null-terminated */
514 if (n + value_len < skb->len)
515 fp[n + value_len] = 0x00;
516 IRDA_DEBUG(4, "Got string %s\n", fp+n);
517
518 /* Will truncate to IAS_MAX_STRING bytes */
519 value = irias_new_string_value(fp+n);
520 break;
521 case IAS_OCT_SEQ:
522 value_len = get_unaligned_be16(fp + n);
523 n += 2;
524
525 /* Will truncate to IAS_MAX_OCTET_STRING bytes */
526 value = irias_new_octseq_value(fp+n, value_len);
527 break;
528 default:
529 value = irias_new_missing_value();
530 break;
531 }
532
533 /* Finished, close connection! */
534 iriap_disconnect_request(self);
535
536 /* Warning, the client might close us, so remember no to use self
537 * anymore after calling confirm
538 */
539 if (self->confirm)
540 self->confirm(IAS_SUCCESS, obj_id, value, self->priv);
541 else {
542 IRDA_DEBUG(0, "%s(), missing handler!\n", __func__);
543 irias_delete_value(value);
544 }
545 }
546
547 /*
548 * Function iriap_getvaluebyclass_response ()
549 *
550 * Send answer back to remote LM-IAS
551 *
552 */
553 static void iriap_getvaluebyclass_response(struct iriap_cb *self,
554 __u16 obj_id,
555 __u8 ret_code,
556 struct ias_value *value)
557 {
558 struct sk_buff *tx_skb;
559 int n;
560 __be32 tmp_be32;
561 __be16 tmp_be16;
562 __u8 *fp;
563
564 IRDA_DEBUG(4, "%s()\n", __func__);
565
566 IRDA_ASSERT(self != NULL, return;);
567 IRDA_ASSERT(self->magic == IAS_MAGIC, return;);
568 IRDA_ASSERT(value != NULL, return;);
569 IRDA_ASSERT(value->len <= 1024, return;);
570
571 /* Initialize variables */
572 n = 0;
573
574 /*
575 * We must adjust the size of the response after the length of the
576 * value. We add 32 bytes because of the 6 bytes for the frame and
577 * max 5 bytes for the value coding.
578 */
579 tx_skb = alloc_skb(value->len + self->max_header_size + 32,
580 GFP_ATOMIC);
581 if (!tx_skb)
582 return;
583
584 /* Reserve space for MUX and LAP header */
585 skb_reserve(tx_skb, self->max_header_size);
586 skb_put(tx_skb, 6);
587
588 fp = tx_skb->data;
589
590 /* Build frame */
591 fp[n++] = GET_VALUE_BY_CLASS | IAP_LST;
592 fp[n++] = ret_code;
593
594 /* Insert list length (MSB first) */
595 tmp_be16 = htons(0x0001);
596 memcpy(fp+n, &tmp_be16, 2); n += 2;
597
598 /* Insert object identifier ( MSB first) */
599 tmp_be16 = cpu_to_be16(obj_id);
600 memcpy(fp+n, &tmp_be16, 2); n += 2;
601
602 switch (value->type) {
603 case IAS_STRING:
604 skb_put(tx_skb, 3 + value->len);
605 fp[n++] = value->type;
606 fp[n++] = 0; /* ASCII */
607 fp[n++] = (__u8) value->len;
608 memcpy(fp+n, value->t.string, value->len); n+=value->len;
609 break;
610 case IAS_INTEGER:
611 skb_put(tx_skb, 5);
612 fp[n++] = value->type;
613
614 tmp_be32 = cpu_to_be32(value->t.integer);
615 memcpy(fp+n, &tmp_be32, 4); n += 4;
616 break;
617 case IAS_OCT_SEQ:
618 skb_put(tx_skb, 3 + value->len);
619 fp[n++] = value->type;
620
621 tmp_be16 = cpu_to_be16(value->len);
622 memcpy(fp+n, &tmp_be16, 2); n += 2;
623 memcpy(fp+n, value->t.oct_seq, value->len); n+=value->len;
624 break;
625 case IAS_MISSING:
626 IRDA_DEBUG( 3, "%s: sending IAS_MISSING\n", __func__);
627 skb_put(tx_skb, 1);
628 fp[n++] = value->type;
629 break;
630 default:
631 IRDA_DEBUG(0, "%s(), type not implemented!\n", __func__);
632 break;
633 }
634 iriap_do_r_connect_event(self, IAP_CALL_RESPONSE, tx_skb);
635
636 /* Drop reference count - see state_r_execute(). */
637 dev_kfree_skb(tx_skb);
638 }
639
640 /*
641 * Function iriap_getvaluebyclass_indication (self, skb)
642 *
643 * getvaluebyclass is requested from peer LM-IAS
644 *
645 */
646 static void iriap_getvaluebyclass_indication(struct iriap_cb *self,
647 struct sk_buff *skb)
648 {
649 struct ias_object *obj;
650 struct ias_attrib *attrib;
651 int name_len;
652 int attr_len;
653 char name[IAS_MAX_CLASSNAME + 1]; /* 60 bytes */
654 char attr[IAS_MAX_ATTRIBNAME + 1]; /* 60 bytes */
655 __u8 *fp;
656 int n;
657
658 IRDA_DEBUG(4, "%s()\n", __func__);
659
660 IRDA_ASSERT(self != NULL, return;);
661 IRDA_ASSERT(self->magic == IAS_MAGIC, return;);
662 IRDA_ASSERT(skb != NULL, return;);
663
664 fp = skb->data;
665 n = 1;
666
667 name_len = fp[n++];
668
669 IRDA_ASSERT(name_len < IAS_MAX_CLASSNAME + 1, return;);
670
671 memcpy(name, fp+n, name_len); n+=name_len;
672 name[name_len] = '\0';
673
674 attr_len = fp[n++];
675
676 IRDA_ASSERT(attr_len < IAS_MAX_ATTRIBNAME + 1, return;);
677
678 memcpy(attr, fp+n, attr_len); n+=attr_len;
679 attr[attr_len] = '\0';
680
681 IRDA_DEBUG(4, "LM-IAS: Looking up %s: %s\n", name, attr);
682 obj = irias_find_object(name);
683
684 if (obj == NULL) {
685 IRDA_DEBUG(2, "LM-IAS: Object %s not found\n", name);
686 iriap_getvaluebyclass_response(self, 0x1235, IAS_CLASS_UNKNOWN,
687 &irias_missing);
688 return;
689 }
690 IRDA_DEBUG(4, "LM-IAS: found %s, id=%d\n", obj->name, obj->id);
691
692 attrib = irias_find_attrib(obj, attr);
693 if (attrib == NULL) {
694 IRDA_DEBUG(2, "LM-IAS: Attribute %s not found\n", attr);
695 iriap_getvaluebyclass_response(self, obj->id,
696 IAS_ATTRIB_UNKNOWN,
697 &irias_missing);
698 return;
699 }
700
701 /* We have a match; send the value. */
702 iriap_getvaluebyclass_response(self, obj->id, IAS_SUCCESS,
703 attrib->value);
704 }
705
706 /*
707 * Function iriap_send_ack (void)
708 *
709 * Currently not used
710 *
711 */
712 void iriap_send_ack(struct iriap_cb *self)
713 {
714 struct sk_buff *tx_skb;
715 __u8 *frame;
716
717 IRDA_DEBUG(2, "%s()\n", __func__);
718
719 IRDA_ASSERT(self != NULL, return;);
720 IRDA_ASSERT(self->magic == IAS_MAGIC, return;);
721
722 tx_skb = alloc_skb(LMP_MAX_HEADER + 1, GFP_ATOMIC);
723 if (!tx_skb)
724 return;
725
726 /* Reserve space for MUX and LAP header */
727 skb_reserve(tx_skb, self->max_header_size);
728 skb_put(tx_skb, 1);
729 frame = tx_skb->data;
730
731 /* Build frame */
732 frame[0] = IAP_LST | IAP_ACK | self->operation;
733
734 irlmp_data_request(self->lsap, tx_skb);
735 }
736
737 void iriap_connect_request(struct iriap_cb *self)
738 {
739 int ret;
740
741 IRDA_ASSERT(self != NULL, return;);
742 IRDA_ASSERT(self->magic == IAS_MAGIC, return;);
743
744 ret = irlmp_connect_request(self->lsap, LSAP_IAS,
745 self->saddr, self->daddr,
746 NULL, NULL);
747 if (ret < 0) {
748 IRDA_DEBUG(0, "%s(), connect failed!\n", __func__);
749 self->confirm(IAS_DISCONNECT, 0, NULL, self->priv);
750 }
751 }
752
753 /*
754 * Function iriap_connect_confirm (handle, skb)
755 *
756 * LSAP connection confirmed!
757 *
758 */
759 static void iriap_connect_confirm(void *instance, void *sap,
760 struct qos_info *qos, __u32 max_seg_size,
761 __u8 max_header_size,
762 struct sk_buff *skb)
763 {
764 struct iriap_cb *self;
765
766 self = instance;
767
768 IRDA_ASSERT(self != NULL, return;);
769 IRDA_ASSERT(self->magic == IAS_MAGIC, return;);
770 IRDA_ASSERT(skb != NULL, return;);
771
772 self->max_data_size = max_seg_size;
773 self->max_header_size = max_header_size;
774
775 del_timer(&self->watchdog_timer);
776
777 iriap_do_client_event(self, IAP_LM_CONNECT_CONFIRM, skb);
778
779 /* Drop reference count - see state_s_make_call(). */
780 dev_kfree_skb(skb);
781 }
782
783 /*
784 * Function iriap_connect_indication ( handle, skb)
785 *
786 * Remote LM-IAS is requesting connection
787 *
788 */
789 static void iriap_connect_indication(void *instance, void *sap,
790 struct qos_info *qos, __u32 max_seg_size,
791 __u8 max_header_size,
792 struct sk_buff *skb)
793 {
794 struct iriap_cb *self, *new;
795
796 IRDA_DEBUG(1, "%s()\n", __func__);
797
798 self = instance;
799
800 IRDA_ASSERT(skb != NULL, return;);
801 IRDA_ASSERT(self != NULL, goto out;);
802 IRDA_ASSERT(self->magic == IAS_MAGIC, goto out;);
803
804 /* Start new server */
805 new = iriap_open(LSAP_IAS, IAS_SERVER, NULL, NULL);
806 if (!new) {
807 IRDA_DEBUG(0, "%s(), open failed\n", __func__);
808 goto out;
809 }
810
811 /* Now attach up the new "socket" */
812 new->lsap = irlmp_dup(self->lsap, new);
813 if (!new->lsap) {
814 IRDA_DEBUG(0, "%s(), dup failed!\n", __func__);
815 goto out;
816 }
817
818 new->max_data_size = max_seg_size;
819 new->max_header_size = max_header_size;
820
821 /* Clean up the original one to keep it in listen state */
822 irlmp_listen(self->lsap);
823
824 iriap_do_server_event(new, IAP_LM_CONNECT_INDICATION, skb);
825
826 out:
827 /* Drop reference count - see state_r_disconnect(). */
828 dev_kfree_skb(skb);
829 }
830
831 /*
832 * Function iriap_data_indication (handle, skb)
833 *
834 * Receives data from connection identified by handle from IrLMP
835 *
836 */
837 static int iriap_data_indication(void *instance, void *sap,
838 struct sk_buff *skb)
839 {
840 struct iriap_cb *self;
841 __u8 *frame;
842 __u8 opcode;
843
844 IRDA_DEBUG(3, "%s()\n", __func__);
845
846 self = instance;
847
848 IRDA_ASSERT(skb != NULL, return 0;);
849 IRDA_ASSERT(self != NULL, goto out;);
850 IRDA_ASSERT(self->magic == IAS_MAGIC, goto out;);
851
852 frame = skb->data;
853
854 if (self->mode == IAS_SERVER) {
855 /* Call server */
856 IRDA_DEBUG(4, "%s(), Calling server!\n", __func__);
857 iriap_do_r_connect_event(self, IAP_RECV_F_LST, skb);
858 goto out;
859 }
860 opcode = frame[0];
861 if (~opcode & IAP_LST) {
862 IRDA_WARNING("%s:, IrIAS multiframe commands or "
863 "results is not implemented yet!\n",
864 __func__);
865 goto out;
866 }
867
868 /* Check for ack frames since they don't contain any data */
869 if (opcode & IAP_ACK) {
870 IRDA_DEBUG(0, "%s() Got ack frame!\n", __func__);
871 goto out;
872 }
873
874 opcode &= ~IAP_LST; /* Mask away LST bit */
875
876 switch (opcode) {
877 case GET_INFO_BASE:
878 IRDA_DEBUG(0, "IrLMP GetInfoBaseDetails not implemented!\n");
879 break;
880 case GET_VALUE_BY_CLASS:
881 iriap_do_call_event(self, IAP_RECV_F_LST, NULL);
882
883 switch (frame[1]) {
884 case IAS_SUCCESS:
885 iriap_getvaluebyclass_confirm(self, skb);
886 break;
887 case IAS_CLASS_UNKNOWN:
888 IRDA_DEBUG(1, "%s(), No such class!\n", __func__);
889 /* Finished, close connection! */
890 iriap_disconnect_request(self);
891
892 /*
893 * Warning, the client might close us, so remember
894 * no to use self anymore after calling confirm
895 */
896 if (self->confirm)
897 self->confirm(IAS_CLASS_UNKNOWN, 0, NULL,
898 self->priv);
899 break;
900 case IAS_ATTRIB_UNKNOWN:
901 IRDA_DEBUG(1, "%s(), No such attribute!\n", __func__);
902 /* Finished, close connection! */
903 iriap_disconnect_request(self);
904
905 /*
906 * Warning, the client might close us, so remember
907 * no to use self anymore after calling confirm
908 */
909 if (self->confirm)
910 self->confirm(IAS_ATTRIB_UNKNOWN, 0, NULL,
911 self->priv);
912 break;
913 }
914 break;
915 default:
916 IRDA_DEBUG(0, "%s(), Unknown op-code: %02x\n", __func__,
917 opcode);
918 break;
919 }
920
921 out:
922 /* Cleanup - sub-calls will have done skb_get() as needed. */
923 dev_kfree_skb(skb);
924 return 0;
925 }
926
927 /*
928 * Function iriap_call_indication (self, skb)
929 *
930 * Received call to server from peer LM-IAS
931 *
932 */
933 void iriap_call_indication(struct iriap_cb *self, struct sk_buff *skb)
934 {
935 __u8 *fp;
936 __u8 opcode;
937
938 IRDA_DEBUG(4, "%s()\n", __func__);
939
940 IRDA_ASSERT(self != NULL, return;);
941 IRDA_ASSERT(self->magic == IAS_MAGIC, return;);
942 IRDA_ASSERT(skb != NULL, return;);
943
944 fp = skb->data;
945
946 opcode = fp[0];
947 if (~opcode & 0x80) {
948 IRDA_WARNING("%s: IrIAS multiframe commands or results "
949 "is not implemented yet!\n", __func__);
950 return;
951 }
952 opcode &= 0x7f; /* Mask away LST bit */
953
954 switch (opcode) {
955 case GET_INFO_BASE:
956 IRDA_WARNING("%s: GetInfoBaseDetails not implemented yet!\n",
957 __func__);
958 break;
959 case GET_VALUE_BY_CLASS:
960 iriap_getvaluebyclass_indication(self, skb);
961 break;
962 }
963 /* skb will be cleaned up in iriap_data_indication */
964 }
965
966 /*
967 * Function iriap_watchdog_timer_expired (data)
968 *
969 * Query has taken too long time, so abort
970 *
971 */
972 static void iriap_watchdog_timer_expired(void *data)
973 {
974 struct iriap_cb *self = (struct iriap_cb *) data;
975
976 IRDA_ASSERT(self != NULL, return;);
977 IRDA_ASSERT(self->magic == IAS_MAGIC, return;);
978
979 /* iriap_close(self); */
980 }
981
982 #ifdef CONFIG_PROC_FS
983
984 static const char *const ias_value_types[] = {
985 "IAS_MISSING",
986 "IAS_INTEGER",
987 "IAS_OCT_SEQ",
988 "IAS_STRING"
989 };
990
991 static inline struct ias_object *irias_seq_idx(loff_t pos)
992 {
993 struct ias_object *obj;
994
995 for (obj = (struct ias_object *) hashbin_get_first(irias_objects);
996 obj; obj = (struct ias_object *) hashbin_get_next(irias_objects)) {
997 if (pos-- == 0)
998 break;
999 }
1000
1001 return obj;
1002 }
1003
1004 static void *irias_seq_start(struct seq_file *seq, loff_t *pos)
1005 {
1006 spin_lock_irq(&irias_objects->hb_spinlock);
1007
1008 return *pos ? irias_seq_idx(*pos - 1) : SEQ_START_TOKEN;
1009 }
1010
1011 static void *irias_seq_next(struct seq_file *seq, void *v, loff_t *pos)
1012 {
1013 ++*pos;
1014
1015 return (v == SEQ_START_TOKEN)
1016 ? (void *) hashbin_get_first(irias_objects)
1017 : (void *) hashbin_get_next(irias_objects);
1018 }
1019
1020 static void irias_seq_stop(struct seq_file *seq, void *v)
1021 {
1022 spin_unlock_irq(&irias_objects->hb_spinlock);
1023 }
1024
1025 static int irias_seq_show(struct seq_file *seq, void *v)
1026 {
1027 if (v == SEQ_START_TOKEN)
1028 seq_puts(seq, "LM-IAS Objects:\n");
1029 else {
1030 struct ias_object *obj = v;
1031 struct ias_attrib *attrib;
1032
1033 IRDA_ASSERT(obj->magic == IAS_OBJECT_MAGIC, return -EINVAL;);
1034
1035 seq_printf(seq, "name: %s, id=%d\n",
1036 obj->name, obj->id);
1037
1038 /* Careful for priority inversions here !
1039 * All other uses of attrib spinlock are independent of
1040 * the object spinlock, so we are safe. Jean II */
1041 spin_lock(&obj->attribs->hb_spinlock);
1042
1043 /* List all attributes for this object */
1044 for (attrib = (struct ias_attrib *) hashbin_get_first(obj->attribs);
1045 attrib != NULL;
1046 attrib = (struct ias_attrib *) hashbin_get_next(obj->attribs)) {
1047
1048 IRDA_ASSERT(attrib->magic == IAS_ATTRIB_MAGIC,
1049 goto outloop; );
1050
1051 seq_printf(seq, " - Attribute name: \"%s\", ",
1052 attrib->name);
1053 seq_printf(seq, "value[%s]: ",
1054 ias_value_types[attrib->value->type]);
1055
1056 switch (attrib->value->type) {
1057 case IAS_INTEGER:
1058 seq_printf(seq, "%d\n",
1059 attrib->value->t.integer);
1060 break;
1061 case IAS_STRING:
1062 seq_printf(seq, "\"%s\"\n",
1063 attrib->value->t.string);
1064 break;
1065 case IAS_OCT_SEQ:
1066 seq_printf(seq, "octet sequence (%d bytes)\n",
1067 attrib->value->len);
1068 break;
1069 case IAS_MISSING:
1070 seq_puts(seq, "missing\n");
1071 break;
1072 default:
1073 seq_printf(seq, "type %d?\n",
1074 attrib->value->type);
1075 }
1076 seq_putc(seq, '\n');
1077
1078 }
1079 IRDA_ASSERT_LABEL(outloop:)
1080 spin_unlock(&obj->attribs->hb_spinlock);
1081 }
1082
1083 return 0;
1084 }
1085
1086 static const struct seq_operations irias_seq_ops = {
1087 .start = irias_seq_start,
1088 .next = irias_seq_next,
1089 .stop = irias_seq_stop,
1090 .show = irias_seq_show,
1091 };
1092
1093 static int irias_seq_open(struct inode *inode, struct file *file)
1094 {
1095 IRDA_ASSERT( irias_objects != NULL, return -EINVAL;);
1096
1097 return seq_open(file, &irias_seq_ops);
1098 }
1099
1100 const struct file_operations irias_seq_fops = {
1101 .owner = THIS_MODULE,
1102 .open = irias_seq_open,
1103 .read = seq_read,
1104 .llseek = seq_lseek,
1105 .release = seq_release,
1106 };
1107
1108 #endif /* PROC_FS */
Linus' kernel tree