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
35 #include <asm/byteorder.h>
36 #include <asm/unaligned.h>
37
38 #include <net/irda/irda.h>
39 #include <net/irda/irttp.h>
40 #include <net/irda/irlmp.h>
41 #include <net/irda/irias_object.h>
42 #include <net/irda/iriap_event.h>
43 #include <net/irda/iriap.h>
44
45 #ifdef CONFIG_IRDA_DEBUG
46 /* FIXME: This one should go in irlmp.c */
47 static const char *ias_charset_types[] = {
48 "CS_ASCII",
49 "CS_ISO_8859_1",
50 "CS_ISO_8859_2",
51 "CS_ISO_8859_3",
52 "CS_ISO_8859_4",
53 "CS_ISO_8859_5",
54 "CS_ISO_8859_6",
55 "CS_ISO_8859_7",
56 "CS_ISO_8859_8",
57 "CS_ISO_8859_9",
58 "CS_UNICODE"
59 };
60 #endif /* CONFIG_IRDA_DEBUG */
61
62 static hashbin_t *iriap = NULL;
63 static void *service_handle;
64
65 static void __iriap_close(struct iriap_cb *self);
66 static int iriap_register_lsap(struct iriap_cb *self, __u8 slsap_sel, int mode);
67 static void iriap_disconnect_indication(void *instance, void *sap,
68 LM_REASON reason, struct sk_buff *skb);
69 static void iriap_connect_indication(void *instance, void *sap,
70 struct qos_info *qos, __u32 max_sdu_size,
71 __u8 max_header_size,
72 struct sk_buff *skb);
73 static void iriap_connect_confirm(void *instance, void *sap,
74 struct qos_info *qos,
75 __u32 max_sdu_size, __u8 max_header_size,
76 struct sk_buff *skb);
77 static int iriap_data_indication(void *instance, void *sap,
78 struct sk_buff *skb);
79
80 static void iriap_watchdog_timer_expired(void *data);
81
82 static inline void iriap_start_watchdog_timer(struct iriap_cb *self,
83 int timeout)
84 {
85 irda_start_timer(&self->watchdog_timer, timeout, self,
86 iriap_watchdog_timer_expired);
87 }
88
89 /*
90 * Function iriap_init (void)
91 *
92 * Initializes the IrIAP layer, called by the module initialization code
93 * in irmod.c
94 */
95 int __init iriap_init(void)
96 {
97 struct ias_object *obj;
98 struct iriap_cb *server;
99 __u8 oct_seq[6];
100 __u16 hints;
101
102 /* Allocate master array */
103 iriap = hashbin_new(HB_LOCK);
104 if (!iriap)
105 return -ENOMEM;
106
107 /* Object repository - defined in irias_object.c */
108 irias_objects = hashbin_new(HB_LOCK);
109 if (!irias_objects) {
110 IRDA_WARNING("%s: Can't allocate irias_objects hashbin!\n",
111 __FUNCTION__);
112 hashbin_delete(iriap, NULL);
113 return -ENOMEM;
114 }
115
116 /*
117 * Register some default services for IrLMP
118 */
119 hints = irlmp_service_to_hint(S_COMPUTER);
120 service_handle = irlmp_register_service(hints);
121
122 /* Register the Device object with LM-IAS */
123 obj = irias_new_object("Device", IAS_DEVICE_ID);
124 irias_add_string_attrib(obj, "DeviceName", "Linux", IAS_KERNEL_ATTR);
125
126 oct_seq[0] = 0x01; /* Version 1 */
127 oct_seq[1] = 0x00; /* IAS support bits */
128 oct_seq[2] = 0x00; /* LM-MUX support bits */
129 #ifdef CONFIG_IRDA_ULTRA
130 oct_seq[2] |= 0x04; /* Connectionless Data support */
131 #endif
132 irias_add_octseq_attrib(obj, "IrLMPSupport", oct_seq, 3,
133 IAS_KERNEL_ATTR);
134 irias_insert_object(obj);
135
136 /*
137 * Register server support with IrLMP so we can accept incoming
138 * connections
139 */
140 server = iriap_open(LSAP_IAS, IAS_SERVER, NULL, NULL);
141 if (!server) {
142 IRDA_DEBUG(0, "%s(), unable to open server\n", __FUNCTION__);
143 return -1;
144 }
145 iriap_register_lsap(server, LSAP_IAS, IAS_SERVER);
146
147 return 0;
148 }
149
150 /*
151 * Function iriap_cleanup (void)
152 *
153 * Initializes the IrIAP layer, called by the module cleanup code in
154 * irmod.c
155 */
156 void iriap_cleanup(void)
157 {
158 irlmp_unregister_service(service_handle);
159
160 hashbin_delete(iriap, (FREE_FUNC) __iriap_close);
161 hashbin_delete(irias_objects, (FREE_FUNC) __irias_delete_object);
162 }
163
164 /*
165 * Function iriap_open (void)
166 *
167 * Opens an instance of the IrIAP layer, and registers with IrLMP
168 */
169 struct iriap_cb *iriap_open(__u8 slsap_sel, int mode, void *priv,
170 CONFIRM_CALLBACK callback)
171 {
172 struct iriap_cb *self;
173
174 IRDA_DEBUG(2, "%s()\n", __FUNCTION__);
175
176 self = kzalloc(sizeof(*self), GFP_ATOMIC);
177 if (!self) {
178 IRDA_WARNING("%s: Unable to kmalloc!\n", __FUNCTION__);
179 return NULL;
180 }
181
182 /*
183 * Initialize instance
184 */
185
186 self->magic = IAS_MAGIC;
187 self->mode = mode;
188 if (mode == IAS_CLIENT)
189 iriap_register_lsap(self, slsap_sel, mode);
190
191 self->confirm = callback;
192 self->priv = priv;
193
194 /* iriap_getvaluebyclass_request() will construct packets before
195 * we connect, so this must have a sane value... Jean II */
196 self->max_header_size = LMP_MAX_HEADER;
197
198 init_timer(&self->watchdog_timer);
199
200 hashbin_insert(iriap, (irda_queue_t *) self, (long) self, NULL);
201
202 /* Initialize state machines */
203 iriap_next_client_state(self, S_DISCONNECT);
204 iriap_next_call_state(self, S_MAKE_CALL);
205 iriap_next_server_state(self, R_DISCONNECT);
206 iriap_next_r_connect_state(self, R_WAITING);
207
208 return self;
209 }
210 EXPORT_SYMBOL(iriap_open);
211
212 /*
213 * Function __iriap_close (self)
214 *
215 * Removes (deallocates) the IrIAP instance
216 *
217 */
218 static void __iriap_close(struct iriap_cb *self)
219 {
220 IRDA_DEBUG(4, "%s()\n", __FUNCTION__);
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_DEBUG(2, "%s()\n", __FUNCTION__);
245
246 IRDA_ASSERT(self != NULL, return;);
247 IRDA_ASSERT(self->magic == IAS_MAGIC, return;);
248
249 if (self->lsap) {
250 irlmp_close_lsap(self->lsap);
251 self->lsap = NULL;
252 }
253
254 entry = (struct iriap_cb *) hashbin_remove(iriap, (long) self, NULL);
255 IRDA_ASSERT(entry == self, return;);
256
257 __iriap_close(self);
258 }
259 EXPORT_SYMBOL(iriap_close);
260
261 static int iriap_register_lsap(struct iriap_cb *self, __u8 slsap_sel, int mode)
262 {
263 notify_t notify;
264
265 IRDA_DEBUG(2, "%s()\n", __FUNCTION__);
266
267 irda_notify_init(¬ify);
268 notify.connect_confirm = iriap_connect_confirm;
269 notify.connect_indication = iriap_connect_indication;
270 notify.disconnect_indication = iriap_disconnect_indication;
271 notify.data_indication = iriap_data_indication;
272 notify.instance = self;
273 if (mode == IAS_CLIENT)
274 strcpy(notify.name, "IrIAS cli");
275 else
276 strcpy(notify.name, "IrIAS srv");
277
278 self->lsap = irlmp_open_lsap(slsap_sel, ¬ify, 0);
279 if (self->lsap == NULL) {
280 IRDA_ERROR("%s: Unable to allocated LSAP!\n", __FUNCTION__);
281 return -1;
282 }
283 self->slsap_sel = self->lsap->slsap_sel;
284
285 return 0;
286 }
287
288 /*
289 * Function iriap_disconnect_indication (handle, reason)
290 *
291 * Got disconnect, so clean up everything associated with this connection
292 *
293 */
294 static void iriap_disconnect_indication(void *instance, void *sap,
295 LM_REASON reason,
296 struct sk_buff *skb)
297 {
298 struct iriap_cb *self;
299
300 IRDA_DEBUG(4, "%s(), reason=%s\n", __FUNCTION__, irlmp_reasons[reason]);
301
302 self = (struct iriap_cb *) instance;
303
304 IRDA_ASSERT(self != NULL, return;);
305 IRDA_ASSERT(self->magic == IAS_MAGIC, return;);
306
307 IRDA_ASSERT(iriap != NULL, return;);
308
309 del_timer(&self->watchdog_timer);
310
311 /* Not needed */
312 if (skb)
313 dev_kfree_skb(skb);
314
315 if (self->mode == IAS_CLIENT) {
316 IRDA_DEBUG(4, "%s(), disconnect as client\n", __FUNCTION__);
317
318
319 iriap_do_client_event(self, IAP_LM_DISCONNECT_INDICATION,
320 NULL);
321 /*
322 * Inform service user that the request failed by sending
323 * it a NULL value. Warning, the client might close us, so
324 * remember no to use self anymore after calling confirm
325 */
326 if (self->confirm)
327 self->confirm(IAS_DISCONNECT, 0, NULL, self->priv);
328 } else {
329 IRDA_DEBUG(4, "%s(), disconnect as server\n", __FUNCTION__);
330 iriap_do_server_event(self, IAP_LM_DISCONNECT_INDICATION,
331 NULL);
332 iriap_close(self);
333 }
334 }
335
336 /*
337 * Function iriap_disconnect_request (handle)
338 */
339 static void iriap_disconnect_request(struct iriap_cb *self)
340 {
341 struct sk_buff *tx_skb;
342
343 IRDA_DEBUG(4, "%s()\n", __FUNCTION__);
344
345 IRDA_ASSERT(self != NULL, return;);
346 IRDA_ASSERT(self->magic == IAS_MAGIC, return;);
347
348 tx_skb = alloc_skb(LMP_MAX_HEADER, GFP_ATOMIC);
349 if (tx_skb == NULL) {
350 IRDA_DEBUG(0,
351 "%s(), Could not allocate an sk_buff of length %d\n",
352 __FUNCTION__, LMP_MAX_HEADER);
353 return;
354 }
355
356 /*
357 * Reserve space for MUX control and LAP header
358 */
359 skb_reserve(tx_skb, LMP_MAX_HEADER);
360
361 irlmp_disconnect_request(self->lsap, tx_skb);
362 }
363
364 /*
365 * Function iriap_getvaluebyclass (addr, name, attr)
366 *
367 * Retrieve all values from attribute in all objects with given class
368 * name
369 */
370 int iriap_getvaluebyclass_request(struct iriap_cb *self,
371 __u32 saddr, __u32 daddr,
372 char *name, char *attr)
373 {
374 struct sk_buff *tx_skb;
375 int name_len, attr_len, skb_len;
376 __u8 *frame;
377
378 IRDA_ASSERT(self != NULL, return -1;);
379 IRDA_ASSERT(self->magic == IAS_MAGIC, return -1;);
380
381 /* Client must supply the destination device address */
382 if (!daddr)
383 return -1;
384
385 self->daddr = daddr;
386 self->saddr = saddr;
387
388 /*
389 * Save operation, so we know what the later indication is about
390 */
391 self->operation = GET_VALUE_BY_CLASS;
392
393 /* Give ourselves 10 secs to finish this operation */
394 iriap_start_watchdog_timer(self, 10*HZ);
395
396 name_len = strlen(name); /* Up to IAS_MAX_CLASSNAME = 60 */
397 attr_len = strlen(attr); /* Up to IAS_MAX_ATTRIBNAME = 60 */
398
399 skb_len = self->max_header_size+2+name_len+1+attr_len+4;
400 tx_skb = alloc_skb(skb_len, GFP_ATOMIC);
401 if (!tx_skb)
402 return -ENOMEM;
403
404 /* Reserve space for MUX and LAP header */
405 skb_reserve(tx_skb, self->max_header_size);
406 skb_put(tx_skb, 3+name_len+attr_len);
407 frame = tx_skb->data;
408
409 /* Build frame */
410 frame[0] = IAP_LST | GET_VALUE_BY_CLASS;
411 frame[1] = name_len; /* Insert length of name */
412 memcpy(frame+2, name, name_len); /* Insert name */
413 frame[2+name_len] = attr_len; /* Insert length of attr */
414 memcpy(frame+3+name_len, attr, attr_len); /* Insert attr */
415
416 iriap_do_client_event(self, IAP_CALL_REQUEST_GVBC, tx_skb);
417
418 /* Drop reference count - see state_s_disconnect(). */
419 dev_kfree_skb(tx_skb);
420
421 return 0;
422 }
423 EXPORT_SYMBOL(iriap_getvaluebyclass_request);
424
425 /*
426 * Function iriap_getvaluebyclass_confirm (self, skb)
427 *
428 * Got result from GetValueByClass command. Parse it and return result
429 * to service user.
430 *
431 */
432 static void iriap_getvaluebyclass_confirm(struct iriap_cb *self,
433 struct sk_buff *skb)
434 {
435 struct ias_value *value;
436 int charset;
437 __u32 value_len;
438 __u32 tmp_cpu32;
439 __u16 obj_id;
440 __u16 len;
441 __u8 type;
442 __u8 *fp;
443 int n;
444
445 IRDA_ASSERT(self != NULL, return;);
446 IRDA_ASSERT(self->magic == IAS_MAGIC, return;);
447 IRDA_ASSERT(skb != NULL, return;);
448
449 /* Initialize variables */
450 fp = skb->data;
451 n = 2;
452
453 /* Get length, MSB first */
454 len = be16_to_cpu(get_unaligned((__be16 *)(fp+n))); n += 2;
455
456 IRDA_DEBUG(4, "%s(), len=%d\n", __FUNCTION__, len);
457
458 /* Get object ID, MSB first */
459 obj_id = be16_to_cpu(get_unaligned((__be16 *)(fp+n))); n += 2;
460
461 type = fp[n++];
462 IRDA_DEBUG(4, "%s(), Value type = %d\n", __FUNCTION__, type);
463
464 switch (type) {
465 case IAS_INTEGER:
466 memcpy(&tmp_cpu32, fp+n, 4); n += 4;
467 be32_to_cpus(&tmp_cpu32);
468 value = irias_new_integer_value(tmp_cpu32);
469
470 /* Legal values restricted to 0x01-0x6f, page 15 irttp */
471 IRDA_DEBUG(4, "%s(), lsap=%d\n", __FUNCTION__, value->t.integer);
472 break;
473 case IAS_STRING:
474 charset = fp[n++];
475
476 switch (charset) {
477 case CS_ASCII:
478 break;
479 /* case CS_ISO_8859_1: */
480 /* case CS_ISO_8859_2: */
481 /* case CS_ISO_8859_3: */
482 /* case CS_ISO_8859_4: */
483 /* case CS_ISO_8859_5: */
484 /* case CS_ISO_8859_6: */
485 /* case CS_ISO_8859_7: */
486 /* case CS_ISO_8859_8: */
487 /* case CS_ISO_8859_9: */
488 /* case CS_UNICODE: */
489 default:
490 IRDA_DEBUG(0, "%s(), charset %s, not supported\n",
491 __FUNCTION__, ias_charset_types[charset]);
492
493 /* Aborting, close connection! */
494 iriap_disconnect_request(self);
495 return;
496 /* break; */
497 }
498 value_len = fp[n++];
499 IRDA_DEBUG(4, "%s(), strlen=%d\n", __FUNCTION__, value_len);
500
501 /* Make sure the string is null-terminated */
502 fp[n+value_len] = 0x00;
503 IRDA_DEBUG(4, "Got string %s\n", fp+n);
504
505 /* Will truncate to IAS_MAX_STRING bytes */
506 value = irias_new_string_value(fp+n);
507 break;
508 case IAS_OCT_SEQ:
509 value_len = be16_to_cpu(get_unaligned((__be16 *)(fp+n)));
510 n += 2;
511
512 /* Will truncate to IAS_MAX_OCTET_STRING bytes */
513 value = irias_new_octseq_value(fp+n, value_len);
514 break;
515 default:
516 value = irias_new_missing_value();
517 break;
518 }
519
520 /* Finished, close connection! */
521 iriap_disconnect_request(self);
522
523 /* Warning, the client might close us, so remember no to use self
524 * anymore after calling confirm
525 */
526 if (self->confirm)
527 self->confirm(IAS_SUCCESS, obj_id, value, self->priv);
528 else {
529 IRDA_DEBUG(0, "%s(), missing handler!\n", __FUNCTION__);
530 irias_delete_value(value);
531 }
532 }
533
534 /*
535 * Function iriap_getvaluebyclass_response ()
536 *
537 * Send answer back to remote LM-IAS
538 *
539 */
540 static void iriap_getvaluebyclass_response(struct iriap_cb *self,
541 __u16 obj_id,
542 __u8 ret_code,
543 struct ias_value *value)
544 {
545 struct sk_buff *tx_skb;
546 int n;
547 __be32 tmp_be32;
548 __be16 tmp_be16;
549 __u8 *fp;
550
551 IRDA_DEBUG(4, "%s()\n", __FUNCTION__);
552
553 IRDA_ASSERT(self != NULL, return;);
554 IRDA_ASSERT(self->magic == IAS_MAGIC, return;);
555 IRDA_ASSERT(value != NULL, return;);
556 IRDA_ASSERT(value->len <= 1024, return;);
557
558 /* Initialize variables */
559 n = 0;
560
561 /*
562 * We must adjust the size of the response after the length of the
563 * value. We add 32 bytes because of the 6 bytes for the frame and
564 * max 5 bytes for the value coding.
565 */
566 tx_skb = alloc_skb(value->len + self->max_header_size + 32,
567 GFP_ATOMIC);
568 if (!tx_skb)
569 return;
570
571 /* Reserve space for MUX and LAP header */
572 skb_reserve(tx_skb, self->max_header_size);
573 skb_put(tx_skb, 6);
574
575 fp = tx_skb->data;
576
577 /* Build frame */
578 fp[n++] = GET_VALUE_BY_CLASS | IAP_LST;
579 fp[n++] = ret_code;
580
581 /* Insert list length (MSB first) */
582 tmp_be16 = htons(0x0001);
583 memcpy(fp+n, &tmp_be16, 2); n += 2;
584
585 /* Insert object identifier ( MSB first) */
586 tmp_be16 = cpu_to_be16(obj_id);
587 memcpy(fp+n, &tmp_be16, 2); n += 2;
588
589 switch (value->type) {
590 case IAS_STRING:
591 skb_put(tx_skb, 3 + value->len);
592 fp[n++] = value->type;
593 fp[n++] = 0; /* ASCII */
594 fp[n++] = (__u8) value->len;
595 memcpy(fp+n, value->t.string, value->len); n+=value->len;
596 break;
597 case IAS_INTEGER:
598 skb_put(tx_skb, 5);
599 fp[n++] = value->type;
600
601 tmp_be32 = cpu_to_be32(value->t.integer);
602 memcpy(fp+n, &tmp_be32, 4); n += 4;
603 break;
604 case IAS_OCT_SEQ:
605 skb_put(tx_skb, 3 + value->len);
606 fp[n++] = value->type;
607
608 tmp_be16 = cpu_to_be16(value->len);
609 memcpy(fp+n, &tmp_be16, 2); n += 2;
610 memcpy(fp+n, value->t.oct_seq, value->len); n+=value->len;
611 break;
612 case IAS_MISSING:
613 IRDA_DEBUG( 3, "%s: sending IAS_MISSING\n", __FUNCTION__);
614 skb_put(tx_skb, 1);
615 fp[n++] = value->type;
616 break;
617 default:
618 IRDA_DEBUG(0, "%s(), type not implemented!\n", __FUNCTION__);
619 break;
620 }
621 iriap_do_r_connect_event(self, IAP_CALL_RESPONSE, tx_skb);
622
623 /* Drop reference count - see state_r_execute(). */
624 dev_kfree_skb(tx_skb);
625 }
626
627 /*
628 * Function iriap_getvaluebyclass_indication (self, skb)
629 *
630 * getvaluebyclass is requested from peer LM-IAS
631 *
632 */
633 static void iriap_getvaluebyclass_indication(struct iriap_cb *self,
634 struct sk_buff *skb)
635 {
636 struct ias_object *obj;
637 struct ias_attrib *attrib;
638 int name_len;
639 int attr_len;
640 char name[IAS_MAX_CLASSNAME + 1]; /* 60 bytes */
641 char attr[IAS_MAX_ATTRIBNAME + 1]; /* 60 bytes */
642 __u8 *fp;
643 int n;
644
645 IRDA_DEBUG(4, "%s()\n", __FUNCTION__);
646
647 IRDA_ASSERT(self != NULL, return;);
648 IRDA_ASSERT(self->magic == IAS_MAGIC, return;);
649 IRDA_ASSERT(skb != NULL, return;);
650
651 fp = skb->data;
652 n = 1;
653
654 name_len = fp[n++];
655 memcpy(name, fp+n, name_len); n+=name_len;
656 name[name_len] = '\0';
657
658 attr_len = fp[n++];
659 memcpy(attr, fp+n, attr_len); n+=attr_len;
660 attr[attr_len] = '\0';
661
662 IRDA_DEBUG(4, "LM-IAS: Looking up %s: %s\n", name, attr);
663 obj = irias_find_object(name);
664
665 if (obj == NULL) {
666 IRDA_DEBUG(2, "LM-IAS: Object %s not found\n", name);
667 iriap_getvaluebyclass_response(self, 0x1235, IAS_CLASS_UNKNOWN,
668 &irias_missing);
669 return;
670 }
671 IRDA_DEBUG(4, "LM-IAS: found %s, id=%d\n", obj->name, obj->id);
672
673 attrib = irias_find_attrib(obj, attr);
674 if (attrib == NULL) {
675 IRDA_DEBUG(2, "LM-IAS: Attribute %s not found\n", attr);
676 iriap_getvaluebyclass_response(self, obj->id,
677 IAS_ATTRIB_UNKNOWN,
678 &irias_missing);
679 return;
680 }
681
682 /* We have a match; send the value. */
683 iriap_getvaluebyclass_response(self, obj->id, IAS_SUCCESS,
684 attrib->value);
685
686 return;
687 }
688
689 /*
690 * Function iriap_send_ack (void)
691 *
692 * Currently not used
693 *
694 */
695 void iriap_send_ack(struct iriap_cb *self)
696 {
697 struct sk_buff *tx_skb;
698 __u8 *frame;
699
700 IRDA_DEBUG(2, "%s()\n", __FUNCTION__);
701
702 IRDA_ASSERT(self != NULL, return;);
703 IRDA_ASSERT(self->magic == IAS_MAGIC, return;);
704
705 tx_skb = alloc_skb(LMP_MAX_HEADER + 1, GFP_ATOMIC);
706 if (!tx_skb)
707 return;
708
709 /* Reserve space for MUX and LAP header */
710 skb_reserve(tx_skb, self->max_header_size);
711 skb_put(tx_skb, 1);
712 frame = tx_skb->data;
713
714 /* Build frame */
715 frame[0] = IAP_LST | IAP_ACK | self->operation;
716
717 irlmp_data_request(self->lsap, tx_skb);
718 }
719
720 void iriap_connect_request(struct iriap_cb *self)
721 {
722 int ret;
723
724 IRDA_ASSERT(self != NULL, return;);
725 IRDA_ASSERT(self->magic == IAS_MAGIC, return;);
726
727 ret = irlmp_connect_request(self->lsap, LSAP_IAS,
728 self->saddr, self->daddr,
729 NULL, NULL);
730 if (ret < 0) {
731 IRDA_DEBUG(0, "%s(), connect failed!\n", __FUNCTION__);
732 self->confirm(IAS_DISCONNECT, 0, NULL, self->priv);
733 }
734 }
735
736 /*
737 * Function iriap_connect_confirm (handle, skb)
738 *
739 * LSAP connection confirmed!
740 *
741 */
742 static void iriap_connect_confirm(void *instance, void *sap,
743 struct qos_info *qos, __u32 max_seg_size,
744 __u8 max_header_size,
745 struct sk_buff *skb)
746 {
747 struct iriap_cb *self;
748
749 self = (struct iriap_cb *) instance;
750
751 IRDA_ASSERT(self != NULL, return;);
752 IRDA_ASSERT(self->magic == IAS_MAGIC, return;);
753 IRDA_ASSERT(skb != NULL, return;);
754
755 self->max_data_size = max_seg_size;
756 self->max_header_size = max_header_size;
757
758 del_timer(&self->watchdog_timer);
759
760 iriap_do_client_event(self, IAP_LM_CONNECT_CONFIRM, skb);
761
762 /* Drop reference count - see state_s_make_call(). */
763 dev_kfree_skb(skb);
764 }
765
766 /*
767 * Function iriap_connect_indication ( handle, skb)
768 *
769 * Remote LM-IAS is requesting connection
770 *
771 */
772 static void iriap_connect_indication(void *instance, void *sap,
773 struct qos_info *qos, __u32 max_seg_size,
774 __u8 max_header_size,
775 struct sk_buff *skb)
776 {
777 struct iriap_cb *self, *new;
778
779 IRDA_DEBUG(1, "%s()\n", __FUNCTION__);
780
781 self = (struct iriap_cb *) instance;
782
783 IRDA_ASSERT(skb != NULL, return;);
784 IRDA_ASSERT(self != NULL, goto out;);
785 IRDA_ASSERT(self->magic == IAS_MAGIC, goto out;);
786
787 /* Start new server */
788 new = iriap_open(LSAP_IAS, IAS_SERVER, NULL, NULL);
789 if (!new) {
790 IRDA_DEBUG(0, "%s(), open failed\n", __FUNCTION__);
791 goto out;
792 }
793
794 /* Now attach up the new "socket" */
795 new->lsap = irlmp_dup(self->lsap, new);
796 if (!new->lsap) {
797 IRDA_DEBUG(0, "%s(), dup failed!\n", __FUNCTION__);
798 goto out;
799 }
800
801 new->max_data_size = max_seg_size;
802 new->max_header_size = max_header_size;
803
804 /* Clean up the original one to keep it in listen state */
805 irlmp_listen(self->lsap);
806
807 iriap_do_server_event(new, IAP_LM_CONNECT_INDICATION, skb);
808
809 out:
810 /* Drop reference count - see state_r_disconnect(). */
811 dev_kfree_skb(skb);
812 }
813
814 /*
815 * Function iriap_data_indication (handle, skb)
816 *
817 * Receives data from connection identified by handle from IrLMP
818 *
819 */
820 static int iriap_data_indication(void *instance, void *sap,
821 struct sk_buff *skb)
822 {
823 struct iriap_cb *self;
824 __u8 *frame;
825 __u8 opcode;
826
827 IRDA_DEBUG(3, "%s()\n", __FUNCTION__);
828
829 self = (struct iriap_cb *) instance;
830
831 IRDA_ASSERT(skb != NULL, return 0;);
832 IRDA_ASSERT(self != NULL, goto out;);
833 IRDA_ASSERT(self->magic == IAS_MAGIC, goto out;);
834
835 frame = skb->data;
836
837 if (self->mode == IAS_SERVER) {
838 /* Call server */
839 IRDA_DEBUG(4, "%s(), Calling server!\n", __FUNCTION__);
840 iriap_do_r_connect_event(self, IAP_RECV_F_LST, skb);
841 goto out;
842 }
843 opcode = frame[0];
844 if (~opcode & IAP_LST) {
845 IRDA_WARNING("%s:, IrIAS multiframe commands or "
846 "results is not implemented yet!\n",
847 __FUNCTION__);
848 goto out;
849 }
850
851 /* Check for ack frames since they don't contain any data */
852 if (opcode & IAP_ACK) {
853 IRDA_DEBUG(0, "%s() Got ack frame!\n", __FUNCTION__);
854 goto out;
855 }
856
857 opcode &= ~IAP_LST; /* Mask away LST bit */
858
859 switch (opcode) {
860 case GET_INFO_BASE:
861 IRDA_DEBUG(0, "IrLMP GetInfoBaseDetails not implemented!\n");
862 break;
863 case GET_VALUE_BY_CLASS:
864 iriap_do_call_event(self, IAP_RECV_F_LST, NULL);
865
866 switch (frame[1]) {
867 case IAS_SUCCESS:
868 iriap_getvaluebyclass_confirm(self, skb);
869 break;
870 case IAS_CLASS_UNKNOWN:
871 IRDA_DEBUG(1, "%s(), No such class!\n", __FUNCTION__);
872 /* Finished, close connection! */
873 iriap_disconnect_request(self);
874
875 /*
876 * Warning, the client might close us, so remember
877 * no to use self anymore after calling confirm
878 */
879 if (self->confirm)
880 self->confirm(IAS_CLASS_UNKNOWN, 0, NULL,
881 self->priv);
882 break;
883 case IAS_ATTRIB_UNKNOWN:
884 IRDA_DEBUG(1, "%s(), No such attribute!\n", __FUNCTION__);
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_ATTRIB_UNKNOWN, 0, NULL,
894 self->priv);
895 break;
896 }
897 break;
898 default:
899 IRDA_DEBUG(0, "%s(), Unknown op-code: %02x\n", __FUNCTION__,
900 opcode);
901 break;
902 }
903
904 out:
905 /* Cleanup - sub-calls will have done skb_get() as needed. */
906 dev_kfree_skb(skb);
907 return 0;
908 }
909
910 /*
911 * Function iriap_call_indication (self, skb)
912 *
913 * Received call to server from peer LM-IAS
914 *
915 */
916 void iriap_call_indication(struct iriap_cb *self, struct sk_buff *skb)
917 {
918 __u8 *fp;
919 __u8 opcode;
920
921 IRDA_DEBUG(4, "%s()\n", __FUNCTION__);
922
923 IRDA_ASSERT(self != NULL, return;);
924 IRDA_ASSERT(self->magic == IAS_MAGIC, return;);
925 IRDA_ASSERT(skb != NULL, return;);
926
927 fp = skb->data;
928
929 opcode = fp[0];
930 if (~opcode & 0x80) {
931 IRDA_WARNING("%s: IrIAS multiframe commands or results "
932 "is not implemented yet!\n", __FUNCTION__);
933 return;
934 }
935 opcode &= 0x7f; /* Mask away LST bit */
936
937 switch (opcode) {
938 case GET_INFO_BASE:
939 IRDA_WARNING("%s: GetInfoBaseDetails not implemented yet!\n",
940 __FUNCTION__);
941 break;
942 case GET_VALUE_BY_CLASS:
943 iriap_getvaluebyclass_indication(self, skb);
944 break;
945 }
946 /* skb will be cleaned up in iriap_data_indication */
947 }
948
949 /*
950 * Function iriap_watchdog_timer_expired (data)
951 *
952 * Query has taken too long time, so abort
953 *
954 */
955 static void iriap_watchdog_timer_expired(void *data)
956 {
957 struct iriap_cb *self = (struct iriap_cb *) data;
958
959 IRDA_ASSERT(self != NULL, return;);
960 IRDA_ASSERT(self->magic == IAS_MAGIC, return;);
961
962 /* iriap_close(self); */
963 }
964
965 #ifdef CONFIG_PROC_FS
966
967 static const char *ias_value_types[] = {
968 "IAS_MISSING",
969 "IAS_INTEGER",
970 "IAS_OCT_SEQ",
971 "IAS_STRING"
972 };
973
974 static inline struct ias_object *irias_seq_idx(loff_t pos)
975 {
976 struct ias_object *obj;
977
978 for (obj = (struct ias_object *) hashbin_get_first(irias_objects);
979 obj; obj = (struct ias_object *) hashbin_get_next(irias_objects)) {
980 if (pos-- == 0)
981 break;
982 }
983
984 return obj;
985 }
986
987 static void *irias_seq_start(struct seq_file *seq, loff_t *pos)
988 {
989 spin_lock_irq(&irias_objects->hb_spinlock);
990
991 return *pos ? irias_seq_idx(*pos - 1) : SEQ_START_TOKEN;
992 }
993
994 static void *irias_seq_next(struct seq_file *seq, void *v, loff_t *pos)
995 {
996 ++*pos;
997
998 return (v == SEQ_START_TOKEN)
999 ? (void *) hashbin_get_first(irias_objects)
1000 : (void *) hashbin_get_next(irias_objects);
1001 }
1002
1003 static void irias_seq_stop(struct seq_file *seq, void *v)
1004 {
1005 spin_unlock_irq(&irias_objects->hb_spinlock);
1006 }
1007
1008 static int irias_seq_show(struct seq_file *seq, void *v)
1009 {
1010 if (v == SEQ_START_TOKEN)
1011 seq_puts(seq, "LM-IAS Objects:\n");
1012 else {
1013 struct ias_object *obj = v;
1014 struct ias_attrib *attrib;
1015
1016 IRDA_ASSERT(obj->magic == IAS_OBJECT_MAGIC, return -EINVAL;);
1017
1018 seq_printf(seq, "name: %s, id=%d\n",
1019 obj->name, obj->id);
1020
1021 /* Careful for priority inversions here !
1022 * All other uses of attrib spinlock are independent of
1023 * the object spinlock, so we are safe. Jean II */
1024 spin_lock(&obj->attribs->hb_spinlock);
1025
1026 /* List all attributes for this object */
1027 for (attrib = (struct ias_attrib *) hashbin_get_first(obj->attribs);
1028 attrib != NULL;
1029 attrib = (struct ias_attrib *) hashbin_get_next(obj->attribs)) {
1030
1031 IRDA_ASSERT(attrib->magic == IAS_ATTRIB_MAGIC,
1032 goto outloop; );
1033
1034 seq_printf(seq, " - Attribute name: \"%s\", ",
1035 attrib->name);
1036 seq_printf(seq, "value[%s]: ",
1037 ias_value_types[attrib->value->type]);
1038
1039 switch (attrib->value->type) {
1040 case IAS_INTEGER:
1041 seq_printf(seq, "%d\n",
1042 attrib->value->t.integer);
1043 break;
1044 case IAS_STRING:
1045 seq_printf(seq, "\"%s\"\n",
1046 attrib->value->t.string);
1047 break;
1048 case IAS_OCT_SEQ:
1049 seq_printf(seq, "octet sequence (%d bytes)\n",
1050 attrib->value->len);
1051 break;
1052 case IAS_MISSING:
1053 seq_puts(seq, "missing\n");
1054 break;
1055 default:
1056 seq_printf(seq, "type %d?\n",
1057 attrib->value->type);
1058 }
1059 seq_putc(seq, '\n');
1060
1061 }
1062 IRDA_ASSERT_LABEL(outloop:)
1063 spin_unlock(&obj->attribs->hb_spinlock);
1064 }
1065
1066 return 0;
1067 }
1068
1069 static const struct seq_operations irias_seq_ops = {
1070 .start = irias_seq_start,
1071 .next = irias_seq_next,
1072 .stop = irias_seq_stop,
1073 .show = irias_seq_show,
1074 };
1075
1076 static int irias_seq_open(struct inode *inode, struct file *file)
1077 {
1078 IRDA_ASSERT( irias_objects != NULL, return -EINVAL;);
1079
1080 return seq_open(file, &irias_seq_ops);
1081 }
1082
1083 const struct file_operations irias_seq_fops = {
1084 .owner = THIS_MODULE,
1085 .open = irias_seq_open,
1086 .read = seq_read,
1087 .llseek = seq_lseek,
1088 .release = seq_release,
1089 };
1090
1091 #endif /* PROC_FS */
1092
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