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Linux v2.6.17-rc2
[linux-2.6/next.git] / net / irda / iriap.c
blob254f9074690011a66e0382fbef5f65892e81b32e
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/config.h>
28 #include <linux/module.h>
29 #include <linux/types.h>
30 #include <linux/skbuff.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 __exit 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 = kmalloc(sizeof(struct iriap_cb), 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 memset(self, 0, sizeof(struct iriap_cb));
186
187 self->magic = IAS_MAGIC;
188 self->mode = mode;
189 if (mode == IAS_CLIENT)
190 iriap_register_lsap(self, slsap_sel, mode);
191
192 self->confirm = callback;
193 self->priv = priv;
194
195 /* iriap_getvaluebyclass_request() will construct packets before
196 * we connect, so this must have a sane value... Jean II */
197 self->max_header_size = LMP_MAX_HEADER;
198
199 init_timer(&self->watchdog_timer);
200
201 hashbin_insert(iriap, (irda_queue_t *) self, (long) self, NULL);
202
203 /* Initialize state machines */
204 iriap_next_client_state(self, S_DISCONNECT);
205 iriap_next_call_state(self, S_MAKE_CALL);
206 iriap_next_server_state(self, R_DISCONNECT);
207 iriap_next_r_connect_state(self, R_WAITING);
208
209 return self;
210 }
211 EXPORT_SYMBOL(iriap_open);
212
213 /*
214 * Function __iriap_close (self)
215 *
216 * Removes (deallocates) the IrIAP instance
217 *
218 */
219 static void __iriap_close(struct iriap_cb *self)
220 {
221 IRDA_DEBUG(4, "%s()\n", __FUNCTION__);
222
223 IRDA_ASSERT(self != NULL, return;);
224 IRDA_ASSERT(self->magic == IAS_MAGIC, return;);
225
226 del_timer(&self->watchdog_timer);
227
228 if (self->request_skb)
229 dev_kfree_skb(self->request_skb);
230
231 self->magic = 0;
232
233 kfree(self);
234 }
235
236 /*
237 * Function iriap_close (void)
238 *
239 * Closes IrIAP and deregisters with IrLMP
240 */
241 void iriap_close(struct iriap_cb *self)
242 {
243 struct iriap_cb *entry;
244
245 IRDA_DEBUG(2, "%s()\n", __FUNCTION__);
246
247 IRDA_ASSERT(self != NULL, return;);
248 IRDA_ASSERT(self->magic == IAS_MAGIC, return;);
249
250 if (self->lsap) {
251 irlmp_close_lsap(self->lsap);
252 self->lsap = NULL;
253 }
254
255 entry = (struct iriap_cb *) hashbin_remove(iriap, (long) self, NULL);
256 IRDA_ASSERT(entry == self, return;);
257
258 __iriap_close(self);
259 }
260 EXPORT_SYMBOL(iriap_close);
261
262 static int iriap_register_lsap(struct iriap_cb *self, __u8 slsap_sel, int mode)
263 {
264 notify_t notify;
265
266 IRDA_DEBUG(2, "%s()\n", __FUNCTION__);
267
268 irda_notify_init(&notify);
269 notify.connect_confirm = iriap_connect_confirm;
270 notify.connect_indication = iriap_connect_indication;
271 notify.disconnect_indication = iriap_disconnect_indication;
272 notify.data_indication = iriap_data_indication;
273 notify.instance = self;
274 if (mode == IAS_CLIENT)
275 strcpy(notify.name, "IrIAS cli");
276 else
277 strcpy(notify.name, "IrIAS srv");
278
279 self->lsap = irlmp_open_lsap(slsap_sel, &notify, 0);
280 if (self->lsap == NULL) {
281 IRDA_ERROR("%s: Unable to allocated LSAP!\n", __FUNCTION__);
282 return -1;
283 }
284 self->slsap_sel = self->lsap->slsap_sel;
285
286 return 0;
287 }
288
289 /*
290 * Function iriap_disconnect_indication (handle, reason)
291 *
292 * Got disconnect, so clean up everything associated with this connection
293 *
294 */
295 static void iriap_disconnect_indication(void *instance, void *sap,
296 LM_REASON reason,
297 struct sk_buff *skb)
298 {
299 struct iriap_cb *self;
300
301 IRDA_DEBUG(4, "%s(), reason=%s\n", __FUNCTION__, irlmp_reasons[reason]);
302
303 self = (struct iriap_cb *) instance;
304
305 IRDA_ASSERT(self != NULL, return;);
306 IRDA_ASSERT(self->magic == IAS_MAGIC, return;);
307
308 IRDA_ASSERT(iriap != NULL, return;);
309
310 del_timer(&self->watchdog_timer);
311
312 /* Not needed */
313 if (skb)
314 dev_kfree_skb(skb);
315
316 if (self->mode == IAS_CLIENT) {
317 IRDA_DEBUG(4, "%s(), disconnect as client\n", __FUNCTION__);
318
319
320 iriap_do_client_event(self, IAP_LM_DISCONNECT_INDICATION,
321 NULL);
322 /*
323 * Inform service user that the request failed by sending
324 * it a NULL value. Warning, the client might close us, so
325 * remember no to use self anymore after calling confirm
326 */
327 if (self->confirm)
328 self->confirm(IAS_DISCONNECT, 0, NULL, self->priv);
329 } else {
330 IRDA_DEBUG(4, "%s(), disconnect as server\n", __FUNCTION__);
331 iriap_do_server_event(self, IAP_LM_DISCONNECT_INDICATION,
332 NULL);
333 iriap_close(self);
334 }
335 }
336
337 /*
338 * Function iriap_disconnect_request (handle)
339 */
340 static void iriap_disconnect_request(struct iriap_cb *self)
341 {
342 struct sk_buff *tx_skb;
343
344 IRDA_DEBUG(4, "%s()\n", __FUNCTION__);
345
346 IRDA_ASSERT(self != NULL, return;);
347 IRDA_ASSERT(self->magic == IAS_MAGIC, return;);
348
349 tx_skb = dev_alloc_skb(64);
350 if (tx_skb == NULL) {
351 IRDA_DEBUG(0, "%s(), Could not allocate an sk_buff of length %d\n",
352 __FUNCTION__, 64);
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 = dev_alloc_skb(skb_len);
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((__u16 *)(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((__u16 *)(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((__u16 *)(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 __u32 tmp_be32, tmp_be16;
548 __u8 *fp;
549
550 IRDA_DEBUG(4, "%s()\n", __FUNCTION__);
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 = dev_alloc_skb(value->len + self->max_header_size + 32);
566 if (!tx_skb)
567 return;
568
569 /* Reserve space for MUX and LAP header */
570 skb_reserve(tx_skb, self->max_header_size);
571 skb_put(tx_skb, 6);
572
573 fp = tx_skb->data;
574
575 /* Build frame */
576 fp[n++] = GET_VALUE_BY_CLASS | IAP_LST;
577 fp[n++] = ret_code;
578
579 /* Insert list length (MSB first) */
580 tmp_be16 = __constant_htons(0x0001);
581 memcpy(fp+n, &tmp_be16, 2); n += 2;
582
583 /* Insert object identifier ( MSB first) */
584 tmp_be16 = cpu_to_be16(obj_id);
585 memcpy(fp+n, &tmp_be16, 2); n += 2;
586
587 switch (value->type) {
588 case IAS_STRING:
589 skb_put(tx_skb, 3 + value->len);
590 fp[n++] = value->type;
591 fp[n++] = 0; /* ASCII */
592 fp[n++] = (__u8) value->len;
593 memcpy(fp+n, value->t.string, value->len); n+=value->len;
594 break;
595 case IAS_INTEGER:
596 skb_put(tx_skb, 5);
597 fp[n++] = value->type;
598
599 tmp_be32 = cpu_to_be32(value->t.integer);
600 memcpy(fp+n, &tmp_be32, 4); n += 4;
601 break;
602 case IAS_OCT_SEQ:
603 skb_put(tx_skb, 3 + value->len);
604 fp[n++] = value->type;
605
606 tmp_be16 = cpu_to_be16(value->len);
607 memcpy(fp+n, &tmp_be16, 2); n += 2;
608 memcpy(fp+n, value->t.oct_seq, value->len); n+=value->len;
609 break;
610 case IAS_MISSING:
611 IRDA_DEBUG( 3, "%s: sending IAS_MISSING\n", __FUNCTION__);
612 skb_put(tx_skb, 1);
613 fp[n++] = value->type;
614 break;
615 default:
616 IRDA_DEBUG(0, "%s(), type not implemented!\n", __FUNCTION__);
617 break;
618 }
619 iriap_do_r_connect_event(self, IAP_CALL_RESPONSE, tx_skb);
620
621 /* Drop reference count - see state_r_execute(). */
622 dev_kfree_skb(tx_skb);
623 }
624
625 /*
626 * Function iriap_getvaluebyclass_indication (self, skb)
627 *
628 * getvaluebyclass is requested from peer LM-IAS
629 *
630 */
631 static void iriap_getvaluebyclass_indication(struct iriap_cb *self,
632 struct sk_buff *skb)
633 {
634 struct ias_object *obj;
635 struct ias_attrib *attrib;
636 int name_len;
637 int attr_len;
638 char name[IAS_MAX_CLASSNAME + 1]; /* 60 bytes */
639 char attr[IAS_MAX_ATTRIBNAME + 1]; /* 60 bytes */
640 __u8 *fp;
641 int n;
642
643 IRDA_DEBUG(4, "%s()\n", __FUNCTION__);
644
645 IRDA_ASSERT(self != NULL, return;);
646 IRDA_ASSERT(self->magic == IAS_MAGIC, return;);
647 IRDA_ASSERT(skb != NULL, return;);
648
649 fp = skb->data;
650 n = 1;
651
652 name_len = fp[n++];
653 memcpy(name, fp+n, name_len); n+=name_len;
654 name[name_len] = '\0';
655
656 attr_len = fp[n++];
657 memcpy(attr, fp+n, attr_len); n+=attr_len;
658 attr[attr_len] = '\0';
659
660 IRDA_DEBUG(4, "LM-IAS: Looking up %s: %s\n", name, attr);
661 obj = irias_find_object(name);
662
663 if (obj == NULL) {
664 IRDA_DEBUG(2, "LM-IAS: Object %s not found\n", name);
665 iriap_getvaluebyclass_response(self, 0x1235, IAS_CLASS_UNKNOWN,
666 &irias_missing);
667 return;
668 }
669 IRDA_DEBUG(4, "LM-IAS: found %s, id=%d\n", obj->name, obj->id);
670
671 attrib = irias_find_attrib(obj, attr);
672 if (attrib == NULL) {
673 IRDA_DEBUG(2, "LM-IAS: Attribute %s not found\n", attr);
674 iriap_getvaluebyclass_response(self, obj->id,
675 IAS_ATTRIB_UNKNOWN,
676 &irias_missing);
677 return;
678 }
679
680 /* We have a match; send the value. */
681 iriap_getvaluebyclass_response(self, obj->id, IAS_SUCCESS,
682 attrib->value);
683
684 return;
685 }
686
687 /*
688 * Function iriap_send_ack (void)
689 *
690 * Currently not used
691 *
692 */
693 void iriap_send_ack(struct iriap_cb *self)
694 {
695 struct sk_buff *tx_skb;
696 __u8 *frame;
697
698 IRDA_DEBUG(2, "%s()\n", __FUNCTION__);
699
700 IRDA_ASSERT(self != NULL, return;);
701 IRDA_ASSERT(self->magic == IAS_MAGIC, return;);
702
703 tx_skb = dev_alloc_skb(64);
704 if (!tx_skb)
705 return;
706
707 /* Reserve space for MUX and LAP header */
708 skb_reserve(tx_skb, self->max_header_size);
709 skb_put(tx_skb, 1);
710 frame = tx_skb->data;
711
712 /* Build frame */
713 frame[0] = IAP_LST | IAP_ACK | self->operation;
714
715 irlmp_data_request(self->lsap, tx_skb);
716 }
717
718 void iriap_connect_request(struct iriap_cb *self)
719 {
720 int ret;
721
722 IRDA_ASSERT(self != NULL, return;);
723 IRDA_ASSERT(self->magic == IAS_MAGIC, return;);
724
725 ret = irlmp_connect_request(self->lsap, LSAP_IAS,
726 self->saddr, self->daddr,
727 NULL, NULL);
728 if (ret < 0) {
729 IRDA_DEBUG(0, "%s(), connect failed!\n", __FUNCTION__);
730 self->confirm(IAS_DISCONNECT, 0, NULL, self->priv);
731 }
732 }
733
734 /*
735 * Function iriap_connect_confirm (handle, skb)
736 *
737 * LSAP connection confirmed!
738 *
739 */
740 static void iriap_connect_confirm(void *instance, void *sap,
741 struct qos_info *qos, __u32 max_seg_size,
742 __u8 max_header_size,
743 struct sk_buff *skb)
744 {
745 struct iriap_cb *self;
746
747 self = (struct iriap_cb *) instance;
748
749 IRDA_ASSERT(self != NULL, return;);
750 IRDA_ASSERT(self->magic == IAS_MAGIC, return;);
751 IRDA_ASSERT(skb != NULL, return;);
752
753 self->max_data_size = max_seg_size;
754 self->max_header_size = max_header_size;
755
756 del_timer(&self->watchdog_timer);
757
758 iriap_do_client_event(self, IAP_LM_CONNECT_CONFIRM, skb);
759
760 /* Drop reference count - see state_s_make_call(). */
761 dev_kfree_skb(skb);
762 }
763
764 /*
765 * Function iriap_connect_indication ( handle, skb)
766 *
767 * Remote LM-IAS is requesting connection
768 *
769 */
770 static void iriap_connect_indication(void *instance, void *sap,
771 struct qos_info *qos, __u32 max_seg_size,
772 __u8 max_header_size,
773 struct sk_buff *skb)
774 {
775 struct iriap_cb *self, *new;
776
777 IRDA_DEBUG(1, "%s()\n", __FUNCTION__);
778
779 self = (struct iriap_cb *) instance;
780
781 IRDA_ASSERT(skb != NULL, return;);
782 IRDA_ASSERT(self != NULL, goto out;);
783 IRDA_ASSERT(self->magic == IAS_MAGIC, goto out;);
784
785 /* Start new server */
786 new = iriap_open(LSAP_IAS, IAS_SERVER, NULL, NULL);
787 if (!new) {
788 IRDA_DEBUG(0, "%s(), open failed\n", __FUNCTION__);
789 goto out;
790 }
791
792 /* Now attach up the new "socket" */
793 new->lsap = irlmp_dup(self->lsap, new);
794 if (!new->lsap) {
795 IRDA_DEBUG(0, "%s(), dup failed!\n", __FUNCTION__);
796 goto out;
797 }
798
799 new->max_data_size = max_seg_size;
800 new->max_header_size = max_header_size;
801
802 /* Clean up the original one to keep it in listen state */
803 irlmp_listen(self->lsap);
804
805 iriap_do_server_event(new, IAP_LM_CONNECT_INDICATION, skb);
806
807 out:
808 /* Drop reference count - see state_r_disconnect(). */
809 dev_kfree_skb(skb);
810 }
811
812 /*
813 * Function iriap_data_indication (handle, skb)
814 *
815 * Receives data from connection identified by handle from IrLMP
816 *
817 */
818 static int iriap_data_indication(void *instance, void *sap,
819 struct sk_buff *skb)
820 {
821 struct iriap_cb *self;
822 __u8 *frame;
823 __u8 opcode;
824
825 IRDA_DEBUG(3, "%s()\n", __FUNCTION__);
826
827 self = (struct iriap_cb *) instance;
828
829 IRDA_ASSERT(skb != NULL, return 0;);
830 IRDA_ASSERT(self != NULL, goto out;);
831 IRDA_ASSERT(self->magic == IAS_MAGIC, goto out;);
832
833 frame = skb->data;
834
835 if (self->mode == IAS_SERVER) {
836 /* Call server */
837 IRDA_DEBUG(4, "%s(), Calling server!\n", __FUNCTION__);
838 iriap_do_r_connect_event(self, IAP_RECV_F_LST, skb);
839 goto out;
840 }
841 opcode = frame[0];
842 if (~opcode & IAP_LST) {
843 IRDA_WARNING("%s:, IrIAS multiframe commands or "
844 "results is not implemented yet!\n",
845 __FUNCTION__);
846 goto out;
847 }
848
849 /* Check for ack frames since they don't contain any data */
850 if (opcode & IAP_ACK) {
851 IRDA_DEBUG(0, "%s() Got ack frame!\n", __FUNCTION__);
852 goto out;
853 }
854
855 opcode &= ~IAP_LST; /* Mask away LST bit */
856
857 switch (opcode) {
858 case GET_INFO_BASE:
859 IRDA_DEBUG(0, "IrLMP GetInfoBaseDetails not implemented!\n");
860 break;
861 case GET_VALUE_BY_CLASS:
862 iriap_do_call_event(self, IAP_RECV_F_LST, NULL);
863
864 switch (frame[1]) {
865 case IAS_SUCCESS:
866 iriap_getvaluebyclass_confirm(self, skb);
867 break;
868 case IAS_CLASS_UNKNOWN:
869 IRDA_DEBUG(1, "%s(), No such class!\n", __FUNCTION__);
870 /* Finished, close connection! */
871 iriap_disconnect_request(self);
872
873 /*
874 * Warning, the client might close us, so remember
875 * no to use self anymore after calling confirm
876 */
877 if (self->confirm)
878 self->confirm(IAS_CLASS_UNKNOWN, 0, NULL,
879 self->priv);
880 break;
881 case IAS_ATTRIB_UNKNOWN:
882 IRDA_DEBUG(1, "%s(), No such attribute!\n", __FUNCTION__);
883 /* Finished, close connection! */
884 iriap_disconnect_request(self);
885
886 /*
887 * Warning, the client might close us, so remember
888 * no to use self anymore after calling confirm
889 */
890 if (self->confirm)
891 self->confirm(IAS_ATTRIB_UNKNOWN, 0, NULL,
892 self->priv);
893 break;
894 }
895 break;
896 default:
897 IRDA_DEBUG(0, "%s(), Unknown op-code: %02x\n", __FUNCTION__,
898 opcode);
899 break;
900 }
901
902 out:
903 /* Cleanup - sub-calls will have done skb_get() as needed. */
904 dev_kfree_skb(skb);
905 return 0;
906 }
907
908 /*
909 * Function iriap_call_indication (self, skb)
910 *
911 * Received call to server from peer LM-IAS
912 *
913 */
914 void iriap_call_indication(struct iriap_cb *self, struct sk_buff *skb)
915 {
916 __u8 *fp;
917 __u8 opcode;
918
919 IRDA_DEBUG(4, "%s()\n", __FUNCTION__);
920
921 IRDA_ASSERT(self != NULL, return;);
922 IRDA_ASSERT(self->magic == IAS_MAGIC, return;);
923 IRDA_ASSERT(skb != NULL, return;);
924
925 fp = skb->data;
926
927 opcode = fp[0];
928 if (~opcode & 0x80) {
929 IRDA_WARNING("%s: IrIAS multiframe commands or results"
930 "is not implemented yet!\n", __FUNCTION__);
931 return;
932 }
933 opcode &= 0x7f; /* Mask away LST bit */
934
935 switch (opcode) {
936 case GET_INFO_BASE:
937 IRDA_WARNING("%s: GetInfoBaseDetails not implemented yet!\n",
938 __FUNCTION__);
939 break;
940 case GET_VALUE_BY_CLASS:
941 iriap_getvaluebyclass_indication(self, skb);
942 break;
943 }
944 /* skb will be cleaned up in iriap_data_indication */
945 }
946
947 /*
948 * Function iriap_watchdog_timer_expired (data)
949 *
950 * Query has taken too long time, so abort
951 *
952 */
953 static void iriap_watchdog_timer_expired(void *data)
954 {
955 struct iriap_cb *self = (struct iriap_cb *) data;
956
957 IRDA_ASSERT(self != NULL, return;);
958 IRDA_ASSERT(self->magic == IAS_MAGIC, return;);
959
960 /* iriap_close(self); */
961 }
962
963 #ifdef CONFIG_PROC_FS
964
965 static const char *ias_value_types[] = {
966 "IAS_MISSING",
967 "IAS_INTEGER",
968 "IAS_OCT_SEQ",
969 "IAS_STRING"
970 };
971
972 static inline struct ias_object *irias_seq_idx(loff_t pos)
973 {
974 struct ias_object *obj;
975
976 for (obj = (struct ias_object *) hashbin_get_first(irias_objects);
977 obj; obj = (struct ias_object *) hashbin_get_next(irias_objects)) {
978 if (pos-- == 0)
979 break;
980 }
981
982 return obj;
983 }
984
985 static void *irias_seq_start(struct seq_file *seq, loff_t *pos)
986 {
987 spin_lock_irq(&irias_objects->hb_spinlock);
988
989 return *pos ? irias_seq_idx(*pos - 1) : SEQ_START_TOKEN;
990 }
991
992 static void *irias_seq_next(struct seq_file *seq, void *v, loff_t *pos)
993 {
994 ++*pos;
995
996 return (v == SEQ_START_TOKEN)
997 ? (void *) hashbin_get_first(irias_objects)
998 : (void *) hashbin_get_next(irias_objects);
999 }
1000
1001 static void irias_seq_stop(struct seq_file *seq, void *v)
1002 {
1003 spin_unlock_irq(&irias_objects->hb_spinlock);
1004 }
1005
1006 static int irias_seq_show(struct seq_file *seq, void *v)
1007 {
1008 if (v == SEQ_START_TOKEN)
1009 seq_puts(seq, "LM-IAS Objects:\n");
1010 else {
1011 struct ias_object *obj = v;
1012 struct ias_attrib *attrib;
1013
1014 IRDA_ASSERT(obj->magic == IAS_OBJECT_MAGIC, return -EINVAL;);
1015
1016 seq_printf(seq, "name: %s, id=%d\n",
1017 obj->name, obj->id);
1018
1019 /* Careful for priority inversions here !
1020 * All other uses of attrib spinlock are independent of
1021 * the object spinlock, so we are safe. Jean II */
1022 spin_lock(&obj->attribs->hb_spinlock);
1023
1024 /* List all attributes for this object */
1025 for (attrib = (struct ias_attrib *) hashbin_get_first(obj->attribs);
1026 attrib != NULL;
1027 attrib = (struct ias_attrib *) hashbin_get_next(obj->attribs)) {
1028
1029 IRDA_ASSERT(attrib->magic == IAS_ATTRIB_MAGIC,
1030 goto outloop; );
1031
1032 seq_printf(seq, " - Attribute name: \"%s\", ",
1033 attrib->name);
1034 seq_printf(seq, "value[%s]: ",
1035 ias_value_types[attrib->value->type]);
1036
1037 switch (attrib->value->type) {
1038 case IAS_INTEGER:
1039 seq_printf(seq, "%d\n",
1040 attrib->value->t.integer);
1041 break;
1042 case IAS_STRING:
1043 seq_printf(seq, "\"%s\"\n",
1044 attrib->value->t.string);
1045 break;
1046 case IAS_OCT_SEQ:
1047 seq_printf(seq, "octet sequence (%d bytes)\n",
1048 attrib->value->len);
1049 break;
1050 case IAS_MISSING:
1051 seq_puts(seq, "missing\n");
1052 break;
1053 default:
1054 seq_printf(seq, "type %d?\n",
1055 attrib->value->type);
1056 }
1057 seq_putc(seq, '\n');
1058
1059 }
1060 IRDA_ASSERT_LABEL(outloop:)
1061 spin_unlock(&obj->attribs->hb_spinlock);
1062 }
1063
1064 return 0;
1065 }
1066
1067 static struct seq_operations irias_seq_ops = {
1068 .start = irias_seq_start,
1069 .next = irias_seq_next,
1070 .stop = irias_seq_stop,
1071 .show = irias_seq_show,
1072 };
1073
1074 static int irias_seq_open(struct inode *inode, struct file *file)
1075 {
1076 IRDA_ASSERT( irias_objects != NULL, return -EINVAL;);
1077
1078 return seq_open(file, &irias_seq_ops);
1079 }
1080
1081 struct file_operations irias_seq_fops = {
1082 .owner = THIS_MODULE,
1083 .open = irias_seq_open,
1084 .read = seq_read,
1085 .llseek = seq_lseek,
1086 .release = seq_release,
1087 };
1088
1089 #endif /* PROC_FS */
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