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[deliverable/linux.git] / net / irda / iriap.c
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 net_warn_ratelimited("%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 pr_debug("%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 self = kzalloc(sizeof(*self), GFP_ATOMIC);
181 if (!self)
182 return NULL;
183
184 /*
185 * Initialize instance
186 */
187
188 self->magic = IAS_MAGIC;
189 self->mode = mode;
190 if (mode == IAS_CLIENT)
191 iriap_register_lsap(self, slsap_sel, mode);
192
193 self->confirm = callback;
194 self->priv = priv;
195
196 /* iriap_getvaluebyclass_request() will construct packets before
197 * we connect, so this must have a sane value... Jean II */
198 self->max_header_size = LMP_MAX_HEADER;
199
200 init_timer(&self->watchdog_timer);
201
202 hashbin_insert(iriap, (irda_queue_t *) self, (long) self, NULL);
203
204 /* Initialize state machines */
205 iriap_next_client_state(self, S_DISCONNECT);
206 iriap_next_call_state(self, S_MAKE_CALL);
207 iriap_next_server_state(self, R_DISCONNECT);
208 iriap_next_r_connect_state(self, R_WAITING);
209
210 return self;
211 }
212 EXPORT_SYMBOL(iriap_open);
213
214 /*
215 * Function __iriap_close (self)
216 *
217 * Removes (deallocates) the IrIAP instance
218 *
219 */
220 static void __iriap_close(struct iriap_cb *self)
221 {
222 IRDA_ASSERT(self != NULL, return;);
223 IRDA_ASSERT(self->magic == IAS_MAGIC, return;);
224
225 del_timer(&self->watchdog_timer);
226
227 if (self->request_skb)
228 dev_kfree_skb(self->request_skb);
229
230 self->magic = 0;
231
232 kfree(self);
233 }
234
235 /*
236 * Function iriap_close (void)
237 *
238 * Closes IrIAP and deregisters with IrLMP
239 */
240 void iriap_close(struct iriap_cb *self)
241 {
242 struct iriap_cb *entry;
243
244 IRDA_ASSERT(self != NULL, return;);
245 IRDA_ASSERT(self->magic == IAS_MAGIC, return;);
246
247 if (self->lsap) {
248 irlmp_close_lsap(self->lsap);
249 self->lsap = NULL;
250 }
251
252 entry = (struct iriap_cb *) hashbin_remove(iriap, (long) self, NULL);
253 IRDA_ASSERT(entry == self, return;);
254
255 __iriap_close(self);
256 }
257 EXPORT_SYMBOL(iriap_close);
258
259 static int iriap_register_lsap(struct iriap_cb *self, __u8 slsap_sel, int mode)
260 {
261 notify_t notify;
262
263 irda_notify_init(&notify);
264 notify.connect_confirm = iriap_connect_confirm;
265 notify.connect_indication = iriap_connect_indication;
266 notify.disconnect_indication = iriap_disconnect_indication;
267 notify.data_indication = iriap_data_indication;
268 notify.instance = self;
269 if (mode == IAS_CLIENT)
270 strcpy(notify.name, "IrIAS cli");
271 else
272 strcpy(notify.name, "IrIAS srv");
273
274 self->lsap = irlmp_open_lsap(slsap_sel, &notify, 0);
275 if (self->lsap == NULL) {
276 net_err_ratelimited("%s: Unable to allocated LSAP!\n",
277 __func__);
278 return -1;
279 }
280 self->slsap_sel = self->lsap->slsap_sel;
281
282 return 0;
283 }
284
285 /*
286 * Function iriap_disconnect_indication (handle, reason)
287 *
288 * Got disconnect, so clean up everything associated with this connection
289 *
290 */
291 static void iriap_disconnect_indication(void *instance, void *sap,
292 LM_REASON reason,
293 struct sk_buff *skb)
294 {
295 struct iriap_cb *self;
296
297 pr_debug("%s(), reason=%s [%d]\n", __func__,
298 irlmp_reason_str(reason), reason);
299
300 self = instance;
301
302 IRDA_ASSERT(self != NULL, return;);
303 IRDA_ASSERT(self->magic == IAS_MAGIC, return;);
304
305 IRDA_ASSERT(iriap != NULL, return;);
306
307 del_timer(&self->watchdog_timer);
308
309 /* Not needed */
310 if (skb)
311 dev_kfree_skb(skb);
312
313 if (self->mode == IAS_CLIENT) {
314 pr_debug("%s(), disconnect as client\n", __func__);
315
316
317 iriap_do_client_event(self, IAP_LM_DISCONNECT_INDICATION,
318 NULL);
319 /*
320 * Inform service user that the request failed by sending
321 * it a NULL value. Warning, the client might close us, so
322 * remember no to use self anymore after calling confirm
323 */
324 if (self->confirm)
325 self->confirm(IAS_DISCONNECT, 0, NULL, self->priv);
326 } else {
327 pr_debug("%s(), disconnect as server\n", __func__);
328 iriap_do_server_event(self, IAP_LM_DISCONNECT_INDICATION,
329 NULL);
330 iriap_close(self);
331 }
332 }
333
334 /*
335 * Function iriap_disconnect_request (handle)
336 */
337 static void iriap_disconnect_request(struct iriap_cb *self)
338 {
339 struct sk_buff *tx_skb;
340
341 IRDA_ASSERT(self != NULL, return;);
342 IRDA_ASSERT(self->magic == IAS_MAGIC, return;);
343
344 tx_skb = alloc_skb(LMP_MAX_HEADER, GFP_ATOMIC);
345 if (tx_skb == NULL) {
346 pr_debug("%s(), Could not allocate an sk_buff of length %d\n",
347 __func__, LMP_MAX_HEADER);
348 return;
349 }
350
351 /*
352 * Reserve space for MUX control and LAP header
353 */
354 skb_reserve(tx_skb, LMP_MAX_HEADER);
355
356 irlmp_disconnect_request(self->lsap, tx_skb);
357 }
358
359 /*
360 * Function iriap_getvaluebyclass (addr, name, attr)
361 *
362 * Retrieve all values from attribute in all objects with given class
363 * name
364 */
365 int iriap_getvaluebyclass_request(struct iriap_cb *self,
366 __u32 saddr, __u32 daddr,
367 char *name, char *attr)
368 {
369 struct sk_buff *tx_skb;
370 int name_len, attr_len, skb_len;
371 __u8 *frame;
372
373 IRDA_ASSERT(self != NULL, return -1;);
374 IRDA_ASSERT(self->magic == IAS_MAGIC, return -1;);
375
376 /* Client must supply the destination device address */
377 if (!daddr)
378 return -1;
379
380 self->daddr = daddr;
381 self->saddr = saddr;
382
383 /*
384 * Save operation, so we know what the later indication is about
385 */
386 self->operation = GET_VALUE_BY_CLASS;
387
388 /* Give ourselves 10 secs to finish this operation */
389 iriap_start_watchdog_timer(self, 10*HZ);
390
391 name_len = strlen(name); /* Up to IAS_MAX_CLASSNAME = 60 */
392 attr_len = strlen(attr); /* Up to IAS_MAX_ATTRIBNAME = 60 */
393
394 skb_len = self->max_header_size+2+name_len+1+attr_len+4;
395 tx_skb = alloc_skb(skb_len, GFP_ATOMIC);
396 if (!tx_skb)
397 return -ENOMEM;
398
399 /* Reserve space for MUX and LAP header */
400 skb_reserve(tx_skb, self->max_header_size);
401 skb_put(tx_skb, 3+name_len+attr_len);
402 frame = tx_skb->data;
403
404 /* Build frame */
405 frame[0] = IAP_LST | GET_VALUE_BY_CLASS;
406 frame[1] = name_len; /* Insert length of name */
407 memcpy(frame+2, name, name_len); /* Insert name */
408 frame[2+name_len] = attr_len; /* Insert length of attr */
409 memcpy(frame+3+name_len, attr, attr_len); /* Insert attr */
410
411 iriap_do_client_event(self, IAP_CALL_REQUEST_GVBC, tx_skb);
412
413 /* Drop reference count - see state_s_disconnect(). */
414 dev_kfree_skb(tx_skb);
415
416 return 0;
417 }
418 EXPORT_SYMBOL(iriap_getvaluebyclass_request);
419
420 /*
421 * Function iriap_getvaluebyclass_confirm (self, skb)
422 *
423 * Got result from GetValueByClass command. Parse it and return result
424 * to service user.
425 *
426 */
427 static void iriap_getvaluebyclass_confirm(struct iriap_cb *self,
428 struct sk_buff *skb)
429 {
430 struct ias_value *value;
431 int charset;
432 __u32 value_len;
433 __u32 tmp_cpu32;
434 __u16 obj_id;
435 __u16 len;
436 __u8 type;
437 __u8 *fp;
438 int n;
439
440 IRDA_ASSERT(self != NULL, return;);
441 IRDA_ASSERT(self->magic == IAS_MAGIC, return;);
442 IRDA_ASSERT(skb != NULL, return;);
443
444 /* Initialize variables */
445 fp = skb->data;
446 n = 2;
447
448 /* Get length, MSB first */
449 len = get_unaligned_be16(fp + n);
450 n += 2;
451
452 pr_debug("%s(), len=%d\n", __func__, len);
453
454 /* Get object ID, MSB first */
455 obj_id = get_unaligned_be16(fp + n);
456 n += 2;
457
458 type = fp[n++];
459 pr_debug("%s(), Value type = %d\n", __func__, type);
460
461 switch (type) {
462 case IAS_INTEGER:
463 memcpy(&tmp_cpu32, fp+n, 4); n += 4;
464 be32_to_cpus(&tmp_cpu32);
465 value = irias_new_integer_value(tmp_cpu32);
466
467 /* Legal values restricted to 0x01-0x6f, page 15 irttp */
468 pr_debug("%s(), lsap=%d\n", __func__, value->t.integer);
469 break;
470 case IAS_STRING:
471 charset = fp[n++];
472
473 switch (charset) {
474 case CS_ASCII:
475 break;
476 /* case CS_ISO_8859_1: */
477 /* case CS_ISO_8859_2: */
478 /* case CS_ISO_8859_3: */
479 /* case CS_ISO_8859_4: */
480 /* case CS_ISO_8859_5: */
481 /* case CS_ISO_8859_6: */
482 /* case CS_ISO_8859_7: */
483 /* case CS_ISO_8859_8: */
484 /* case CS_ISO_8859_9: */
485 /* case CS_UNICODE: */
486 default:
487 pr_debug("%s(), charset [%d] %s, not supported\n",
488 __func__, charset,
489 charset < ARRAY_SIZE(ias_charset_types) ?
490 ias_charset_types[charset] :
491 "(unknown)");
492
493 /* Aborting, close connection! */
494 iriap_disconnect_request(self);
495 return;
496 /* break; */
497 }
498 value_len = fp[n++];
499 pr_debug("%s(), strlen=%d\n", __func__, value_len);
500
501 /* Make sure the string is null-terminated */
502 if (n + value_len < skb->len)
503 fp[n + value_len] = 0x00;
504 pr_debug("Got string %s\n", fp+n);
505
506 /* Will truncate to IAS_MAX_STRING bytes */
507 value = irias_new_string_value(fp+n);
508 break;
509 case IAS_OCT_SEQ:
510 value_len = get_unaligned_be16(fp + n);
511 n += 2;
512
513 /* Will truncate to IAS_MAX_OCTET_STRING bytes */
514 value = irias_new_octseq_value(fp+n, value_len);
515 break;
516 default:
517 value = irias_new_missing_value();
518 break;
519 }
520
521 /* Finished, close connection! */
522 iriap_disconnect_request(self);
523
524 /* Warning, the client might close us, so remember no to use self
525 * anymore after calling confirm
526 */
527 if (self->confirm)
528 self->confirm(IAS_SUCCESS, obj_id, value, self->priv);
529 else {
530 pr_debug("%s(), missing handler!\n", __func__);
531 irias_delete_value(value);
532 }
533 }
534
535 /*
536 * Function iriap_getvaluebyclass_response ()
537 *
538 * Send answer back to remote LM-IAS
539 *
540 */
541 static void iriap_getvaluebyclass_response(struct iriap_cb *self,
542 __u16 obj_id,
543 __u8 ret_code,
544 struct ias_value *value)
545 {
546 struct sk_buff *tx_skb;
547 int n;
548 __be32 tmp_be32;
549 __be16 tmp_be16;
550 __u8 *fp;
551
552 IRDA_ASSERT(self != NULL, return;);
553 IRDA_ASSERT(self->magic == IAS_MAGIC, return;);
554 IRDA_ASSERT(value != NULL, return;);
555 IRDA_ASSERT(value->len <= 1024, return;);
556
557 /* Initialize variables */
558 n = 0;
559
560 /*
561 * We must adjust the size of the response after the length of the
562 * value. We add 32 bytes because of the 6 bytes for the frame and
563 * max 5 bytes for the value coding.
564 */
565 tx_skb = alloc_skb(value->len + self->max_header_size + 32,
566 GFP_ATOMIC);
567 if (!tx_skb)
568 return;
569
570 /* Reserve space for MUX and LAP header */
571 skb_reserve(tx_skb, self->max_header_size);
572 skb_put(tx_skb, 6);
573
574 fp = tx_skb->data;
575
576 /* Build frame */
577 fp[n++] = GET_VALUE_BY_CLASS | IAP_LST;
578 fp[n++] = ret_code;
579
580 /* Insert list length (MSB first) */
581 tmp_be16 = htons(0x0001);
582 memcpy(fp+n, &tmp_be16, 2); n += 2;
583
584 /* Insert object identifier ( MSB first) */
585 tmp_be16 = cpu_to_be16(obj_id);
586 memcpy(fp+n, &tmp_be16, 2); n += 2;
587
588 switch (value->type) {
589 case IAS_STRING:
590 skb_put(tx_skb, 3 + value->len);
591 fp[n++] = value->type;
592 fp[n++] = 0; /* ASCII */
593 fp[n++] = (__u8) value->len;
594 memcpy(fp+n, value->t.string, value->len); n+=value->len;
595 break;
596 case IAS_INTEGER:
597 skb_put(tx_skb, 5);
598 fp[n++] = value->type;
599
600 tmp_be32 = cpu_to_be32(value->t.integer);
601 memcpy(fp+n, &tmp_be32, 4); n += 4;
602 break;
603 case IAS_OCT_SEQ:
604 skb_put(tx_skb, 3 + value->len);
605 fp[n++] = value->type;
606
607 tmp_be16 = cpu_to_be16(value->len);
608 memcpy(fp+n, &tmp_be16, 2); n += 2;
609 memcpy(fp+n, value->t.oct_seq, value->len); n+=value->len;
610 break;
611 case IAS_MISSING:
612 pr_debug("%s: sending IAS_MISSING\n", __func__);
613 skb_put(tx_skb, 1);
614 fp[n++] = value->type;
615 break;
616 default:
617 pr_debug("%s(), type not implemented!\n", __func__);
618 break;
619 }
620 iriap_do_r_connect_event(self, IAP_CALL_RESPONSE, tx_skb);
621
622 /* Drop reference count - see state_r_execute(). */
623 dev_kfree_skb(tx_skb);
624 }
625
626 /*
627 * Function iriap_getvaluebyclass_indication (self, skb)
628 *
629 * getvaluebyclass is requested from peer LM-IAS
630 *
631 */
632 static void iriap_getvaluebyclass_indication(struct iriap_cb *self,
633 struct sk_buff *skb)
634 {
635 struct ias_object *obj;
636 struct ias_attrib *attrib;
637 int name_len;
638 int attr_len;
639 char name[IAS_MAX_CLASSNAME + 1]; /* 60 bytes */
640 char attr[IAS_MAX_ATTRIBNAME + 1]; /* 60 bytes */
641 __u8 *fp;
642 int n;
643
644 IRDA_ASSERT(self != NULL, return;);
645 IRDA_ASSERT(self->magic == IAS_MAGIC, return;);
646 IRDA_ASSERT(skb != NULL, return;);
647
648 fp = skb->data;
649 n = 1;
650
651 name_len = fp[n++];
652
653 IRDA_ASSERT(name_len < IAS_MAX_CLASSNAME + 1, return;);
654
655 memcpy(name, fp+n, name_len); n+=name_len;
656 name[name_len] = '\0';
657
658 attr_len = fp[n++];
659
660 IRDA_ASSERT(attr_len < IAS_MAX_ATTRIBNAME + 1, return;);
661
662 memcpy(attr, fp+n, attr_len); n+=attr_len;
663 attr[attr_len] = '\0';
664
665 pr_debug("LM-IAS: Looking up %s: %s\n", name, attr);
666 obj = irias_find_object(name);
667
668 if (obj == NULL) {
669 pr_debug("LM-IAS: Object %s not found\n", name);
670 iriap_getvaluebyclass_response(self, 0x1235, IAS_CLASS_UNKNOWN,
671 &irias_missing);
672 return;
673 }
674 pr_debug("LM-IAS: found %s, id=%d\n", obj->name, obj->id);
675
676 attrib = irias_find_attrib(obj, attr);
677 if (attrib == NULL) {
678 pr_debug("LM-IAS: Attribute %s not found\n", attr);
679 iriap_getvaluebyclass_response(self, obj->id,
680 IAS_ATTRIB_UNKNOWN,
681 &irias_missing);
682 return;
683 }
684
685 /* We have a match; send the value. */
686 iriap_getvaluebyclass_response(self, obj->id, IAS_SUCCESS,
687 attrib->value);
688 }
689
690 /*
691 * Function iriap_send_ack (void)
692 *
693 * Currently not used
694 *
695 */
696 void iriap_send_ack(struct iriap_cb *self)
697 {
698 struct sk_buff *tx_skb;
699 __u8 *frame;
700
701 IRDA_ASSERT(self != NULL, return;);
702 IRDA_ASSERT(self->magic == IAS_MAGIC, return;);
703
704 tx_skb = alloc_skb(LMP_MAX_HEADER + 1, GFP_ATOMIC);
705 if (!tx_skb)
706 return;
707
708 /* Reserve space for MUX and LAP header */
709 skb_reserve(tx_skb, self->max_header_size);
710 skb_put(tx_skb, 1);
711 frame = tx_skb->data;
712
713 /* Build frame */
714 frame[0] = IAP_LST | IAP_ACK | self->operation;
715
716 irlmp_data_request(self->lsap, tx_skb);
717 }
718
719 void iriap_connect_request(struct iriap_cb *self)
720 {
721 int ret;
722
723 IRDA_ASSERT(self != NULL, return;);
724 IRDA_ASSERT(self->magic == IAS_MAGIC, return;);
725
726 ret = irlmp_connect_request(self->lsap, LSAP_IAS,
727 self->saddr, self->daddr,
728 NULL, NULL);
729 if (ret < 0) {
730 pr_debug("%s(), connect failed!\n", __func__);
731 self->confirm(IAS_DISCONNECT, 0, NULL, self->priv);
732 }
733 }
734
735 /*
736 * Function iriap_connect_confirm (handle, skb)
737 *
738 * LSAP connection confirmed!
739 *
740 */
741 static void iriap_connect_confirm(void *instance, void *sap,
742 struct qos_info *qos, __u32 max_seg_size,
743 __u8 max_header_size,
744 struct sk_buff *skb)
745 {
746 struct iriap_cb *self;
747
748 self = instance;
749
750 IRDA_ASSERT(self != NULL, return;);
751 IRDA_ASSERT(self->magic == IAS_MAGIC, return;);
752 IRDA_ASSERT(skb != NULL, return;);
753
754 self->max_data_size = max_seg_size;
755 self->max_header_size = max_header_size;
756
757 del_timer(&self->watchdog_timer);
758
759 iriap_do_client_event(self, IAP_LM_CONNECT_CONFIRM, skb);
760
761 /* Drop reference count - see state_s_make_call(). */
762 dev_kfree_skb(skb);
763 }
764
765 /*
766 * Function iriap_connect_indication ( handle, skb)
767 *
768 * Remote LM-IAS is requesting connection
769 *
770 */
771 static void iriap_connect_indication(void *instance, void *sap,
772 struct qos_info *qos, __u32 max_seg_size,
773 __u8 max_header_size,
774 struct sk_buff *skb)
775 {
776 struct iriap_cb *self, *new;
777
778 self = instance;
779
780 IRDA_ASSERT(skb != NULL, return;);
781 IRDA_ASSERT(self != NULL, goto out;);
782 IRDA_ASSERT(self->magic == IAS_MAGIC, goto out;);
783
784 /* Start new server */
785 new = iriap_open(LSAP_IAS, IAS_SERVER, NULL, NULL);
786 if (!new) {
787 pr_debug("%s(), open failed\n", __func__);
788 goto out;
789 }
790
791 /* Now attach up the new "socket" */
792 new->lsap = irlmp_dup(self->lsap, new);
793 if (!new->lsap) {
794 pr_debug("%s(), dup failed!\n", __func__);
795 goto out;
796 }
797
798 new->max_data_size = max_seg_size;
799 new->max_header_size = max_header_size;
800
801 /* Clean up the original one to keep it in listen state */
802 irlmp_listen(self->lsap);
803
804 iriap_do_server_event(new, IAP_LM_CONNECT_INDICATION, skb);
805
806 out:
807 /* Drop reference count - see state_r_disconnect(). */
808 dev_kfree_skb(skb);
809 }
810
811 /*
812 * Function iriap_data_indication (handle, skb)
813 *
814 * Receives data from connection identified by handle from IrLMP
815 *
816 */
817 static int iriap_data_indication(void *instance, void *sap,
818 struct sk_buff *skb)
819 {
820 struct iriap_cb *self;
821 __u8 *frame;
822 __u8 opcode;
823
824 self = instance;
825
826 IRDA_ASSERT(skb != NULL, return 0;);
827 IRDA_ASSERT(self != NULL, goto out;);
828 IRDA_ASSERT(self->magic == IAS_MAGIC, goto out;);
829
830 frame = skb->data;
831
832 if (self->mode == IAS_SERVER) {
833 /* Call server */
834 pr_debug("%s(), Calling server!\n", __func__);
835 iriap_do_r_connect_event(self, IAP_RECV_F_LST, skb);
836 goto out;
837 }
838 opcode = frame[0];
839 if (~opcode & IAP_LST) {
840 net_warn_ratelimited("%s:, IrIAS multiframe commands or results is not implemented yet!\n",
841 __func__);
842 goto out;
843 }
844
845 /* Check for ack frames since they don't contain any data */
846 if (opcode & IAP_ACK) {
847 pr_debug("%s() Got ack frame!\n", __func__);
848 goto out;
849 }
850
851 opcode &= ~IAP_LST; /* Mask away LST bit */
852
853 switch (opcode) {
854 case GET_INFO_BASE:
855 pr_debug("IrLMP GetInfoBaseDetails not implemented!\n");
856 break;
857 case GET_VALUE_BY_CLASS:
858 iriap_do_call_event(self, IAP_RECV_F_LST, NULL);
859
860 switch (frame[1]) {
861 case IAS_SUCCESS:
862 iriap_getvaluebyclass_confirm(self, skb);
863 break;
864 case IAS_CLASS_UNKNOWN:
865 pr_debug("%s(), No such class!\n", __func__);
866 /* Finished, close connection! */
867 iriap_disconnect_request(self);
868
869 /*
870 * Warning, the client might close us, so remember
871 * no to use self anymore after calling confirm
872 */
873 if (self->confirm)
874 self->confirm(IAS_CLASS_UNKNOWN, 0, NULL,
875 self->priv);
876 break;
877 case IAS_ATTRIB_UNKNOWN:
878 pr_debug("%s(), No such attribute!\n", __func__);
879 /* Finished, close connection! */
880 iriap_disconnect_request(self);
881
882 /*
883 * Warning, the client might close us, so remember
884 * no to use self anymore after calling confirm
885 */
886 if (self->confirm)
887 self->confirm(IAS_ATTRIB_UNKNOWN, 0, NULL,
888 self->priv);
889 break;
890 }
891 break;
892 default:
893 pr_debug("%s(), Unknown op-code: %02x\n", __func__,
894 opcode);
895 break;
896 }
897
898 out:
899 /* Cleanup - sub-calls will have done skb_get() as needed. */
900 dev_kfree_skb(skb);
901 return 0;
902 }
903
904 /*
905 * Function iriap_call_indication (self, skb)
906 *
907 * Received call to server from peer LM-IAS
908 *
909 */
910 void iriap_call_indication(struct iriap_cb *self, struct sk_buff *skb)
911 {
912 __u8 *fp;
913 __u8 opcode;
914
915 IRDA_ASSERT(self != NULL, return;);
916 IRDA_ASSERT(self->magic == IAS_MAGIC, return;);
917 IRDA_ASSERT(skb != NULL, return;);
918
919 fp = skb->data;
920
921 opcode = fp[0];
922 if (~opcode & 0x80) {
923 net_warn_ratelimited("%s: IrIAS multiframe commands or results is not implemented yet!\n",
924 __func__);
925 return;
926 }
927 opcode &= 0x7f; /* Mask away LST bit */
928
929 switch (opcode) {
930 case GET_INFO_BASE:
931 net_warn_ratelimited("%s: GetInfoBaseDetails not implemented yet!\n",
932 __func__);
933 break;
934 case GET_VALUE_BY_CLASS:
935 iriap_getvaluebyclass_indication(self, skb);
936 break;
937 }
938 /* skb will be cleaned up in iriap_data_indication */
939 }
940
941 /*
942 * Function iriap_watchdog_timer_expired (data)
943 *
944 * Query has taken too long time, so abort
945 *
946 */
947 static void iriap_watchdog_timer_expired(void *data)
948 {
949 struct iriap_cb *self = (struct iriap_cb *) data;
950
951 IRDA_ASSERT(self != NULL, return;);
952 IRDA_ASSERT(self->magic == IAS_MAGIC, return;);
953
954 /* iriap_close(self); */
955 }
956
957 #ifdef CONFIG_PROC_FS
958
959 static const char *const ias_value_types[] = {
960 "IAS_MISSING",
961 "IAS_INTEGER",
962 "IAS_OCT_SEQ",
963 "IAS_STRING"
964 };
965
966 static inline struct ias_object *irias_seq_idx(loff_t pos)
967 {
968 struct ias_object *obj;
969
970 for (obj = (struct ias_object *) hashbin_get_first(irias_objects);
971 obj; obj = (struct ias_object *) hashbin_get_next(irias_objects)) {
972 if (pos-- == 0)
973 break;
974 }
975
976 return obj;
977 }
978
979 static void *irias_seq_start(struct seq_file *seq, loff_t *pos)
980 {
981 spin_lock_irq(&irias_objects->hb_spinlock);
982
983 return *pos ? irias_seq_idx(*pos - 1) : SEQ_START_TOKEN;
984 }
985
986 static void *irias_seq_next(struct seq_file *seq, void *v, loff_t *pos)
987 {
988 ++*pos;
989
990 return (v == SEQ_START_TOKEN)
991 ? (void *) hashbin_get_first(irias_objects)
992 : (void *) hashbin_get_next(irias_objects);
993 }
994
995 static void irias_seq_stop(struct seq_file *seq, void *v)
996 {
997 spin_unlock_irq(&irias_objects->hb_spinlock);
998 }
999
1000 static int irias_seq_show(struct seq_file *seq, void *v)
1001 {
1002 if (v == SEQ_START_TOKEN)
1003 seq_puts(seq, "LM-IAS Objects:\n");
1004 else {
1005 struct ias_object *obj = v;
1006 struct ias_attrib *attrib;
1007
1008 IRDA_ASSERT(obj->magic == IAS_OBJECT_MAGIC, return -EINVAL;);
1009
1010 seq_printf(seq, "name: %s, id=%d\n",
1011 obj->name, obj->id);
1012
1013 /* Careful for priority inversions here !
1014 * All other uses of attrib spinlock are independent of
1015 * the object spinlock, so we are safe. Jean II */
1016 spin_lock(&obj->attribs->hb_spinlock);
1017
1018 /* List all attributes for this object */
1019 for (attrib = (struct ias_attrib *) hashbin_get_first(obj->attribs);
1020 attrib != NULL;
1021 attrib = (struct ias_attrib *) hashbin_get_next(obj->attribs)) {
1022
1023 IRDA_ASSERT(attrib->magic == IAS_ATTRIB_MAGIC,
1024 goto outloop; );
1025
1026 seq_printf(seq, " - Attribute name: \"%s\", ",
1027 attrib->name);
1028 seq_printf(seq, "value[%s]: ",
1029 ias_value_types[attrib->value->type]);
1030
1031 switch (attrib->value->type) {
1032 case IAS_INTEGER:
1033 seq_printf(seq, "%d\n",
1034 attrib->value->t.integer);
1035 break;
1036 case IAS_STRING:
1037 seq_printf(seq, "\"%s\"\n",
1038 attrib->value->t.string);
1039 break;
1040 case IAS_OCT_SEQ:
1041 seq_printf(seq, "octet sequence (%d bytes)\n",
1042 attrib->value->len);
1043 break;
1044 case IAS_MISSING:
1045 seq_puts(seq, "missing\n");
1046 break;
1047 default:
1048 seq_printf(seq, "type %d?\n",
1049 attrib->value->type);
1050 }
1051 seq_putc(seq, '\n');
1052
1053 }
1054 IRDA_ASSERT_LABEL(outloop:)
1055 spin_unlock(&obj->attribs->hb_spinlock);
1056 }
1057
1058 return 0;
1059 }
1060
1061 static const struct seq_operations irias_seq_ops = {
1062 .start = irias_seq_start,
1063 .next = irias_seq_next,
1064 .stop = irias_seq_stop,
1065 .show = irias_seq_show,
1066 };
1067
1068 static int irias_seq_open(struct inode *inode, struct file *file)
1069 {
1070 IRDA_ASSERT( irias_objects != NULL, return -EINVAL;);
1071
1072 return seq_open(file, &irias_seq_ops);
1073 }
1074
1075 const struct file_operations irias_seq_fops = {
1076 .owner = THIS_MODULE,
1077 .open = irias_seq_open,
1078 .read = seq_read,
1079 .llseek = seq_lseek,
1080 .release = seq_release,
1081 };
1082
1083 #endif /* PROC_FS */
Linux kernel - Deliverables
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