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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 */
48static 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
63static hashbin_t *iriap = NULL;
64static void *service_handle;
65
66static void __iriap_close(struct iriap_cb *self);
67static int iriap_register_lsap(struct iriap_cb *self, __u8 slsap_sel, int mode);
68static void iriap_disconnect_indication(void *instance, void *sap,
69 LM_REASON reason, struct sk_buff *skb);
70static 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);
74static 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);
78static int iriap_data_indication(void *instance, void *sap,
79 struct sk_buff *skb);
80
81static void iriap_watchdog_timer_expired(void *data);
82
83static 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
90static 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 */
98int __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 */
162void 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 */
175struct 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}
216EXPORT_SYMBOL(iriap_open);
217
218/*
219 * Function __iriap_close (self)
220 *
221 * Removes (deallocates) the IrIAP instance
222 *
223 */
224static 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 */
246void 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}
265EXPORT_SYMBOL(iriap_close);
266
267static 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(¬ify);
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, ¬ify, 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 */
300static 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\n", __func__, irlmp_reasons[reason]);
307
308 self = instance;
309
310 IRDA_ASSERT(self != NULL, return;);
311 IRDA_ASSERT(self->magic == IAS_MAGIC, return;);
312
313 IRDA_ASSERT(iriap != NULL, return;);
314
315 del_timer(&self->watchdog_timer);
316
317 /* Not needed */
318 if (skb)
319 dev_kfree_skb(skb);
320
321 if (self->mode == IAS_CLIENT) {
322 IRDA_DEBUG(4, "%s(), disconnect as client\n", __func__);
323
324
325 iriap_do_client_event(self, IAP_LM_DISCONNECT_INDICATION,
326 NULL);
327 /*
328 * Inform service user that the request failed by sending
329 * it a NULL value. Warning, the client might close us, so
330 * remember no to use self anymore after calling confirm
331 */
332 if (self->confirm)
333 self->confirm(IAS_DISCONNECT, 0, NULL, self->priv);
334 } else {
335 IRDA_DEBUG(4, "%s(), disconnect as server\n", __func__);
336 iriap_do_server_event(self, IAP_LM_DISCONNECT_INDICATION,
337 NULL);
338 iriap_close(self);
339 }
340}
341
342/*
343 * Function iriap_disconnect_request (handle)
344 */
345static void iriap_disconnect_request(struct iriap_cb *self)
346{
347 struct sk_buff *tx_skb;
348
349 IRDA_DEBUG(4, "%s()\n", __func__);
350
351 IRDA_ASSERT(self != NULL, return;);
352 IRDA_ASSERT(self->magic == IAS_MAGIC, return;);
353
354 tx_skb = alloc_skb(LMP_MAX_HEADER, GFP_ATOMIC);
355 if (tx_skb == NULL) {
356 IRDA_DEBUG(0,
357 "%s(), Could not allocate an sk_buff of length %d\n",
358 __func__, LMP_MAX_HEADER);
359 return;
360 }
361
362 /*
363 * Reserve space for MUX control and LAP header
364 */
365 skb_reserve(tx_skb, LMP_MAX_HEADER);
366
367 irlmp_disconnect_request(self->lsap, tx_skb);
368}
369
370/*
371 * Function iriap_getvaluebyclass (addr, name, attr)
372 *
373 * Retrieve all values from attribute in all objects with given class
374 * name
375 */
376int iriap_getvaluebyclass_request(struct iriap_cb *self,
377 __u32 saddr, __u32 daddr,
378 char *name, char *attr)
379{
380 struct sk_buff *tx_skb;
381 int name_len, attr_len, skb_len;
382 __u8 *frame;
383
384 IRDA_ASSERT(self != NULL, return -1;);
385 IRDA_ASSERT(self->magic == IAS_MAGIC, return -1;);
386
387 /* Client must supply the destination device address */
388 if (!daddr)
389 return -1;
390
391 self->daddr = daddr;
392 self->saddr = saddr;
393
394 /*
395 * Save operation, so we know what the later indication is about
396 */
397 self->operation = GET_VALUE_BY_CLASS;
398
399 /* Give ourselves 10 secs to finish this operation */
400 iriap_start_watchdog_timer(self, 10*HZ);
401
402 name_len = strlen(name); /* Up to IAS_MAX_CLASSNAME = 60 */
403 attr_len = strlen(attr); /* Up to IAS_MAX_ATTRIBNAME = 60 */
404
405 skb_len = self->max_header_size+2+name_len+1+attr_len+4;
406 tx_skb = alloc_skb(skb_len, GFP_ATOMIC);
407 if (!tx_skb)
408 return -ENOMEM;
409
410 /* Reserve space for MUX and LAP header */
411 skb_reserve(tx_skb, self->max_header_size);
412 skb_put(tx_skb, 3+name_len+attr_len);
413 frame = tx_skb->data;
414
415 /* Build frame */
416 frame[0] = IAP_LST | GET_VALUE_BY_CLASS;
417 frame[1] = name_len; /* Insert length of name */
418 memcpy(frame+2, name, name_len); /* Insert name */
419 frame[2+name_len] = attr_len; /* Insert length of attr */
420 memcpy(frame+3+name_len, attr, attr_len); /* Insert attr */
421
422 iriap_do_client_event(self, IAP_CALL_REQUEST_GVBC, tx_skb);
423
424 /* Drop reference count - see state_s_disconnect(). */
425 dev_kfree_skb(tx_skb);
426
427 return 0;
428}
429EXPORT_SYMBOL(iriap_getvaluebyclass_request);
430
431/*
432 * Function iriap_getvaluebyclass_confirm (self, skb)
433 *
434 * Got result from GetValueByClass command. Parse it and return result
435 * to service user.
436 *
437 */
438static void iriap_getvaluebyclass_confirm(struct iriap_cb *self,
439 struct sk_buff *skb)
440{
441 struct ias_value *value;
442 int charset;
443 __u32 value_len;
444 __u32 tmp_cpu32;
445 __u16 obj_id;
446 __u16 len;
447 __u8 type;
448 __u8 *fp;
449 int n;
450
451 IRDA_ASSERT(self != NULL, return;);
452 IRDA_ASSERT(self->magic == IAS_MAGIC, return;);
453 IRDA_ASSERT(skb != NULL, return;);
454
455 /* Initialize variables */
456 fp = skb->data;
457 n = 2;
458
459 /* Get length, MSB first */
460 len = get_unaligned_be16(fp + n);
461 n += 2;
462
463 IRDA_DEBUG(4, "%s(), len=%d\n", __func__, len);
464
465 /* Get object ID, MSB first */
466 obj_id = get_unaligned_be16(fp + n);
467 n += 2;
468
469 type = fp[n++];
470 IRDA_DEBUG(4, "%s(), Value type = %d\n", __func__, type);
471
472 switch (type) {
473 case IAS_INTEGER:
474 memcpy(&tmp_cpu32, fp+n, 4); n += 4;
475 be32_to_cpus(&tmp_cpu32);
476 value = irias_new_integer_value(tmp_cpu32);
477
478 /* Legal values restricted to 0x01-0x6f, page 15 irttp */
479 IRDA_DEBUG(4, "%s(), lsap=%d\n", __func__, value->t.integer);
480 break;
481 case IAS_STRING:
482 charset = fp[n++];
483
484 switch (charset) {
485 case CS_ASCII:
486 break;
487/* case CS_ISO_8859_1: */
488/* case CS_ISO_8859_2: */
489/* case CS_ISO_8859_3: */
490/* case CS_ISO_8859_4: */
491/* case CS_ISO_8859_5: */
492/* case CS_ISO_8859_6: */
493/* case CS_ISO_8859_7: */
494/* case CS_ISO_8859_8: */
495/* case CS_ISO_8859_9: */
496/* case CS_UNICODE: */
497 default:
498 IRDA_DEBUG(0, "%s(), charset %s, not supported\n",
499 __func__, ias_charset_types[charset]);
500
501 /* Aborting, close connection! */
502 iriap_disconnect_request(self);
503 return;
504 /* break; */
505 }
506 value_len = fp[n++];
507 IRDA_DEBUG(4, "%s(), strlen=%d\n", __func__, value_len);
508
509 /* Make sure the string is null-terminated */
510 if (n + value_len < skb->len)
511 fp[n + value_len] = 0x00;
512 IRDA_DEBUG(4, "Got string %s\n", fp+n);
513
514 /* Will truncate to IAS_MAX_STRING bytes */
515 value = irias_new_string_value(fp+n);
516 break;
517 case IAS_OCT_SEQ:
518 value_len = get_unaligned_be16(fp + n);
519 n += 2;
520
521 /* Will truncate to IAS_MAX_OCTET_STRING bytes */
522 value = irias_new_octseq_value(fp+n, value_len);
523 break;
524 default:
525 value = irias_new_missing_value();
526 break;
527 }
528
529 /* Finished, close connection! */
530 iriap_disconnect_request(self);
531
532 /* Warning, the client might close us, so remember no to use self
533 * anymore after calling confirm
534 */
535 if (self->confirm)
536 self->confirm(IAS_SUCCESS, obj_id, value, self->priv);
537 else {
538 IRDA_DEBUG(0, "%s(), missing handler!\n", __func__);
539 irias_delete_value(value);
540 }
541}
542
543/*
544 * Function iriap_getvaluebyclass_response ()
545 *
546 * Send answer back to remote LM-IAS
547 *
548 */
549static void iriap_getvaluebyclass_response(struct iriap_cb *self,
550 __u16 obj_id,
551 __u8 ret_code,
552 struct ias_value *value)
553{
554 struct sk_buff *tx_skb;
555 int n;
556 __be32 tmp_be32;
557 __be16 tmp_be16;
558 __u8 *fp;
559
560 IRDA_DEBUG(4, "%s()\n", __func__);
561
562 IRDA_ASSERT(self != NULL, return;);
563 IRDA_ASSERT(self->magic == IAS_MAGIC, return;);
564 IRDA_ASSERT(value != NULL, return;);
565 IRDA_ASSERT(value->len <= 1024, return;);
566
567 /* Initialize variables */
568 n = 0;
569
570 /*
571 * We must adjust the size of the response after the length of the
572 * value. We add 32 bytes because of the 6 bytes for the frame and
573 * max 5 bytes for the value coding.
574 */
575 tx_skb = alloc_skb(value->len + self->max_header_size + 32,
576 GFP_ATOMIC);
577 if (!tx_skb)
578 return;
579
580 /* Reserve space for MUX and LAP header */
581 skb_reserve(tx_skb, self->max_header_size);
582 skb_put(tx_skb, 6);
583
584 fp = tx_skb->data;
585
586 /* Build frame */
587 fp[n++] = GET_VALUE_BY_CLASS | IAP_LST;
588 fp[n++] = ret_code;
589
590 /* Insert list length (MSB first) */
591 tmp_be16 = htons(0x0001);
592 memcpy(fp+n, &tmp_be16, 2); n += 2;
593
594 /* Insert object identifier ( MSB first) */
595 tmp_be16 = cpu_to_be16(obj_id);
596 memcpy(fp+n, &tmp_be16, 2); n += 2;
597
598 switch (value->type) {
599 case IAS_STRING:
600 skb_put(tx_skb, 3 + value->len);
601 fp[n++] = value->type;
602 fp[n++] = 0; /* ASCII */
603 fp[n++] = (__u8) value->len;
604 memcpy(fp+n, value->t.string, value->len); n+=value->len;
605 break;
606 case IAS_INTEGER:
607 skb_put(tx_skb, 5);
608 fp[n++] = value->type;
609
610 tmp_be32 = cpu_to_be32(value->t.integer);
611 memcpy(fp+n, &tmp_be32, 4); n += 4;
612 break;
613 case IAS_OCT_SEQ:
614 skb_put(tx_skb, 3 + value->len);
615 fp[n++] = value->type;
616
617 tmp_be16 = cpu_to_be16(value->len);
618 memcpy(fp+n, &tmp_be16, 2); n += 2;
619 memcpy(fp+n, value->t.oct_seq, value->len); n+=value->len;
620 break;
621 case IAS_MISSING:
622 IRDA_DEBUG( 3, "%s: sending IAS_MISSING\n", __func__);
623 skb_put(tx_skb, 1);
624 fp[n++] = value->type;
625 break;
626 default:
627 IRDA_DEBUG(0, "%s(), type not implemented!\n", __func__);
628 break;
629 }
630 iriap_do_r_connect_event(self, IAP_CALL_RESPONSE, tx_skb);
631
632 /* Drop reference count - see state_r_execute(). */
633 dev_kfree_skb(tx_skb);
634}
635
636/*
637 * Function iriap_getvaluebyclass_indication (self, skb)
638 *
639 * getvaluebyclass is requested from peer LM-IAS
640 *
641 */
642static void iriap_getvaluebyclass_indication(struct iriap_cb *self,
643 struct sk_buff *skb)
644{
645 struct ias_object *obj;
646 struct ias_attrib *attrib;
647 int name_len;
648 int attr_len;
649 char name[IAS_MAX_CLASSNAME + 1]; /* 60 bytes */
650 char attr[IAS_MAX_ATTRIBNAME + 1]; /* 60 bytes */
651 __u8 *fp;
652 int n;
653
654 IRDA_DEBUG(4, "%s()\n", __func__);
655
656 IRDA_ASSERT(self != NULL, return;);
657 IRDA_ASSERT(self->magic == IAS_MAGIC, return;);
658 IRDA_ASSERT(skb != NULL, return;);
659
660 fp = skb->data;
661 n = 1;
662
663 name_len = fp[n++];
664
665 IRDA_ASSERT(name_len < IAS_MAX_CLASSNAME + 1, return;);
666
667 memcpy(name, fp+n, name_len); n+=name_len;
668 name[name_len] = '\0';
669
670 attr_len = fp[n++];
671
672 IRDA_ASSERT(attr_len < IAS_MAX_ATTRIBNAME + 1, return;);
673
674 memcpy(attr, fp+n, attr_len); n+=attr_len;
675 attr[attr_len] = '\0';
676
677 IRDA_DEBUG(4, "LM-IAS: Looking up %s: %s\n", name, attr);
678 obj = irias_find_object(name);
679
680 if (obj == NULL) {
681 IRDA_DEBUG(2, "LM-IAS: Object %s not found\n", name);
682 iriap_getvaluebyclass_response(self, 0x1235, IAS_CLASS_UNKNOWN,
683 &irias_missing);
684 return;
685 }
686 IRDA_DEBUG(4, "LM-IAS: found %s, id=%d\n", obj->name, obj->id);
687
688 attrib = irias_find_attrib(obj, attr);
689 if (attrib == NULL) {
690 IRDA_DEBUG(2, "LM-IAS: Attribute %s not found\n", attr);
691 iriap_getvaluebyclass_response(self, obj->id,
692 IAS_ATTRIB_UNKNOWN,
693 &irias_missing);
694 return;
695 }
696
697 /* We have a match; send the value. */
698 iriap_getvaluebyclass_response(self, obj->id, IAS_SUCCESS,
699 attrib->value);
700}
701
702/*
703 * Function iriap_send_ack (void)
704 *
705 * Currently not used
706 *
707 */
708void iriap_send_ack(struct iriap_cb *self)
709{
710 struct sk_buff *tx_skb;
711 __u8 *frame;
712
713 IRDA_DEBUG(2, "%s()\n", __func__);
714
715 IRDA_ASSERT(self != NULL, return;);
716 IRDA_ASSERT(self->magic == IAS_MAGIC, return;);
717
718 tx_skb = alloc_skb(LMP_MAX_HEADER + 1, GFP_ATOMIC);
719 if (!tx_skb)
720 return;
721
722 /* Reserve space for MUX and LAP header */
723 skb_reserve(tx_skb, self->max_header_size);
724 skb_put(tx_skb, 1);
725 frame = tx_skb->data;
726
727 /* Build frame */
728 frame[0] = IAP_LST | IAP_ACK | self->operation;
729
730 irlmp_data_request(self->lsap, tx_skb);
731}
732
733void iriap_connect_request(struct iriap_cb *self)
734{
735 int ret;
736
737 IRDA_ASSERT(self != NULL, return;);
738 IRDA_ASSERT(self->magic == IAS_MAGIC, return;);
739
740 ret = irlmp_connect_request(self->lsap, LSAP_IAS,
741 self->saddr, self->daddr,
742 NULL, NULL);
743 if (ret < 0) {
744 IRDA_DEBUG(0, "%s(), connect failed!\n", __func__);
745 self->confirm(IAS_DISCONNECT, 0, NULL, self->priv);
746 }
747}
748
749/*
750 * Function iriap_connect_confirm (handle, skb)
751 *
752 * LSAP connection confirmed!
753 *
754 */
755static void iriap_connect_confirm(void *instance, void *sap,
756 struct qos_info *qos, __u32 max_seg_size,
757 __u8 max_header_size,
758 struct sk_buff *skb)
759{
760 struct iriap_cb *self;
761
762 self = instance;
763
764 IRDA_ASSERT(self != NULL, return;);
765 IRDA_ASSERT(self->magic == IAS_MAGIC, return;);
766 IRDA_ASSERT(skb != NULL, return;);
767
768 self->max_data_size = max_seg_size;
769 self->max_header_size = max_header_size;
770
771 del_timer(&self->watchdog_timer);
772
773 iriap_do_client_event(self, IAP_LM_CONNECT_CONFIRM, skb);
774
775 /* Drop reference count - see state_s_make_call(). */
776 dev_kfree_skb(skb);
777}
778
779/*
780 * Function iriap_connect_indication ( handle, skb)
781 *
782 * Remote LM-IAS is requesting connection
783 *
784 */
785static void iriap_connect_indication(void *instance, void *sap,
786 struct qos_info *qos, __u32 max_seg_size,
787 __u8 max_header_size,
788 struct sk_buff *skb)
789{
790 struct iriap_cb *self, *new;
791
792 IRDA_DEBUG(1, "%s()\n", __func__);
793
794 self = instance;
795
796 IRDA_ASSERT(skb != NULL, return;);
797 IRDA_ASSERT(self != NULL, goto out;);
798 IRDA_ASSERT(self->magic == IAS_MAGIC, goto out;);
799
800 /* Start new server */
801 new = iriap_open(LSAP_IAS, IAS_SERVER, NULL, NULL);
802 if (!new) {
803 IRDA_DEBUG(0, "%s(), open failed\n", __func__);
804 goto out;
805 }
806
807 /* Now attach up the new "socket" */
808 new->lsap = irlmp_dup(self->lsap, new);
809 if (!new->lsap) {
810 IRDA_DEBUG(0, "%s(), dup failed!\n", __func__);
811 goto out;
812 }
813
814 new->max_data_size = max_seg_size;
815 new->max_header_size = max_header_size;
816
817 /* Clean up the original one to keep it in listen state */
818 irlmp_listen(self->lsap);
819
820 iriap_do_server_event(new, IAP_LM_CONNECT_INDICATION, skb);
821
822out:
823 /* Drop reference count - see state_r_disconnect(). */
824 dev_kfree_skb(skb);
825}
826
827/*
828 * Function iriap_data_indication (handle, skb)
829 *
830 * Receives data from connection identified by handle from IrLMP
831 *
832 */
833static int iriap_data_indication(void *instance, void *sap,
834 struct sk_buff *skb)
835{
836 struct iriap_cb *self;
837 __u8 *frame;
838 __u8 opcode;
839
840 IRDA_DEBUG(3, "%s()\n", __func__);
841
842 self = instance;
843
844 IRDA_ASSERT(skb != NULL, return 0;);
845 IRDA_ASSERT(self != NULL, goto out;);
846 IRDA_ASSERT(self->magic == IAS_MAGIC, goto out;);
847
848 frame = skb->data;
849
850 if (self->mode == IAS_SERVER) {
851 /* Call server */
852 IRDA_DEBUG(4, "%s(), Calling server!\n", __func__);
853 iriap_do_r_connect_event(self, IAP_RECV_F_LST, skb);
854 goto out;
855 }
856 opcode = frame[0];
857 if (~opcode & IAP_LST) {
858 IRDA_WARNING("%s:, IrIAS multiframe commands or "
859 "results is not implemented yet!\n",
860 __func__);
861 goto out;
862 }
863
864 /* Check for ack frames since they don't contain any data */
865 if (opcode & IAP_ACK) {
866 IRDA_DEBUG(0, "%s() Got ack frame!\n", __func__);
867 goto out;
868 }
869
870 opcode &= ~IAP_LST; /* Mask away LST bit */
871
872 switch (opcode) {
873 case GET_INFO_BASE:
874 IRDA_DEBUG(0, "IrLMP GetInfoBaseDetails not implemented!\n");
875 break;
876 case GET_VALUE_BY_CLASS:
877 iriap_do_call_event(self, IAP_RECV_F_LST, NULL);
878
879 switch (frame[1]) {
880 case IAS_SUCCESS:
881 iriap_getvaluebyclass_confirm(self, skb);
882 break;
883 case IAS_CLASS_UNKNOWN:
884 IRDA_DEBUG(1, "%s(), No such class!\n", __func__);
885 /* Finished, close connection! */
886 iriap_disconnect_request(self);
887
888 /*
889 * Warning, the client might close us, so remember
890 * no to use self anymore after calling confirm
891 */
892 if (self->confirm)
893 self->confirm(IAS_CLASS_UNKNOWN, 0, NULL,
894 self->priv);
895 break;
896 case IAS_ATTRIB_UNKNOWN:
897 IRDA_DEBUG(1, "%s(), No such attribute!\n", __func__);
898 /* Finished, close connection! */
899 iriap_disconnect_request(self);
900
901 /*
902 * Warning, the client might close us, so remember
903 * no to use self anymore after calling confirm
904 */
905 if (self->confirm)
906 self->confirm(IAS_ATTRIB_UNKNOWN, 0, NULL,
907 self->priv);
908 break;
909 }
910 break;
911 default:
912 IRDA_DEBUG(0, "%s(), Unknown op-code: %02x\n", __func__,
913 opcode);
914 break;
915 }
916
917out:
918 /* Cleanup - sub-calls will have done skb_get() as needed. */
919 dev_kfree_skb(skb);
920 return 0;
921}
922
923/*
924 * Function iriap_call_indication (self, skb)
925 *
926 * Received call to server from peer LM-IAS
927 *
928 */
929void iriap_call_indication(struct iriap_cb *self, struct sk_buff *skb)
930{
931 __u8 *fp;
932 __u8 opcode;
933
934 IRDA_DEBUG(4, "%s()\n", __func__);
935
936 IRDA_ASSERT(self != NULL, return;);
937 IRDA_ASSERT(self->magic == IAS_MAGIC, return;);
938 IRDA_ASSERT(skb != NULL, return;);
939
940 fp = skb->data;
941
942 opcode = fp[0];
943 if (~opcode & 0x80) {
944 IRDA_WARNING("%s: IrIAS multiframe commands or results "
945 "is not implemented yet!\n", __func__);
946 return;
947 }
948 opcode &= 0x7f; /* Mask away LST bit */
949
950 switch (opcode) {
951 case GET_INFO_BASE:
952 IRDA_WARNING("%s: GetInfoBaseDetails not implemented yet!\n",
953 __func__);
954 break;
955 case GET_VALUE_BY_CLASS:
956 iriap_getvaluebyclass_indication(self, skb);
957 break;
958 }
959 /* skb will be cleaned up in iriap_data_indication */
960}
961
962/*
963 * Function iriap_watchdog_timer_expired (data)
964 *
965 * Query has taken too long time, so abort
966 *
967 */
968static void iriap_watchdog_timer_expired(void *data)
969{
970 struct iriap_cb *self = (struct iriap_cb *) data;
971
972 IRDA_ASSERT(self != NULL, return;);
973 IRDA_ASSERT(self->magic == IAS_MAGIC, return;);
974
975 /* iriap_close(self); */
976}
977
978#ifdef CONFIG_PROC_FS
979
980static const char *const ias_value_types[] = {
981 "IAS_MISSING",
982 "IAS_INTEGER",
983 "IAS_OCT_SEQ",
984 "IAS_STRING"
985};
986
987static inline struct ias_object *irias_seq_idx(loff_t pos)
988{
989 struct ias_object *obj;
990
991 for (obj = (struct ias_object *) hashbin_get_first(irias_objects);
992 obj; obj = (struct ias_object *) hashbin_get_next(irias_objects)) {
993 if (pos-- == 0)
994 break;
995 }
996
997 return obj;
998}
999
1000static void *irias_seq_start(struct seq_file *seq, loff_t *pos)
1001{
1002 spin_lock_irq(&irias_objects->hb_spinlock);
1003
1004 return *pos ? irias_seq_idx(*pos - 1) : SEQ_START_TOKEN;
1005}
1006
1007static void *irias_seq_next(struct seq_file *seq, void *v, loff_t *pos)
1008{
1009 ++*pos;
1010
1011 return (v == SEQ_START_TOKEN)
1012 ? (void *) hashbin_get_first(irias_objects)
1013 : (void *) hashbin_get_next(irias_objects);
1014}
1015
1016static void irias_seq_stop(struct seq_file *seq, void *v)
1017{
1018 spin_unlock_irq(&irias_objects->hb_spinlock);
1019}
1020
1021static int irias_seq_show(struct seq_file *seq, void *v)
1022{
1023 if (v == SEQ_START_TOKEN)
1024 seq_puts(seq, "LM-IAS Objects:\n");
1025 else {
1026 struct ias_object *obj = v;
1027 struct ias_attrib *attrib;
1028
1029 IRDA_ASSERT(obj->magic == IAS_OBJECT_MAGIC, return -EINVAL;);
1030
1031 seq_printf(seq, "name: %s, id=%d\n",
1032 obj->name, obj->id);
1033
1034 /* Careful for priority inversions here !
1035 * All other uses of attrib spinlock are independent of
1036 * the object spinlock, so we are safe. Jean II */
1037 spin_lock(&obj->attribs->hb_spinlock);
1038
1039 /* List all attributes for this object */
1040 for (attrib = (struct ias_attrib *) hashbin_get_first(obj->attribs);
1041 attrib != NULL;
1042 attrib = (struct ias_attrib *) hashbin_get_next(obj->attribs)) {
1043
1044 IRDA_ASSERT(attrib->magic == IAS_ATTRIB_MAGIC,
1045 goto outloop; );
1046
1047 seq_printf(seq, " - Attribute name: \"%s\", ",
1048 attrib->name);
1049 seq_printf(seq, "value[%s]: ",
1050 ias_value_types[attrib->value->type]);
1051
1052 switch (attrib->value->type) {
1053 case IAS_INTEGER:
1054 seq_printf(seq, "%d\n",
1055 attrib->value->t.integer);
1056 break;
1057 case IAS_STRING:
1058 seq_printf(seq, "\"%s\"\n",
1059 attrib->value->t.string);
1060 break;
1061 case IAS_OCT_SEQ:
1062 seq_printf(seq, "octet sequence (%d bytes)\n",
1063 attrib->value->len);
1064 break;
1065 case IAS_MISSING:
1066 seq_puts(seq, "missing\n");
1067 break;
1068 default:
1069 seq_printf(seq, "type %d?\n",
1070 attrib->value->type);
1071 }
1072 seq_putc(seq, '\n');
1073
1074 }
1075 IRDA_ASSERT_LABEL(outloop:)
1076 spin_unlock(&obj->attribs->hb_spinlock);
1077 }
1078
1079 return 0;
1080}
1081
1082static const struct seq_operations irias_seq_ops = {
1083 .start = irias_seq_start,
1084 .next = irias_seq_next,
1085 .stop = irias_seq_stop,
1086 .show = irias_seq_show,
1087};
1088
1089static int irias_seq_open(struct inode *inode, struct file *file)
1090{
1091 IRDA_ASSERT( irias_objects != NULL, return -EINVAL;);
1092
1093 return seq_open(file, &irias_seq_ops);
1094}
1095
1096const struct file_operations irias_seq_fops = {
1097 .owner = THIS_MODULE,
1098 .open = irias_seq_open,
1099 .read = seq_read,
1100 .llseek = seq_lseek,
1101 .release = seq_release,
1102};
1103
1104#endif /* PROC_FS */