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Merge branch 'kvm-updates/2.6.36' of git://git.kernel.org/pub/scm/virt/kvm/kvm
[linux-rapidio-2.6.git] / net / irda / iriap.c
blobfce364c6c71a5e612fb9f0c2c65b0166749821af
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 /*
91 * Function iriap_init (void)
92 *
93 * Initializes the IrIAP layer, called by the module initialization code
94 * in irmod.c
95 */
96 int __init iriap_init(void)
97 {
98 struct ias_object *obj;
99 struct iriap_cb *server;
100 __u8 oct_seq[6];
101 __u16 hints;
102
103 /* Allocate master array */
104 iriap = hashbin_new(HB_LOCK);
105 if (!iriap)
106 return -ENOMEM;
107
108 /* Object repository - defined in irias_object.c */
109 irias_objects = hashbin_new(HB_LOCK);
110 if (!irias_objects) {
111 IRDA_WARNING("%s: Can't allocate irias_objects hashbin!\n",
112 __func__);
113 hashbin_delete(iriap, NULL);
114 return -ENOMEM;
115 }
116
117 /*
118 * Register some default services for IrLMP
119 */
120 hints = irlmp_service_to_hint(S_COMPUTER);
121 service_handle = irlmp_register_service(hints);
122
123 /* Register the Device object with LM-IAS */
124 obj = irias_new_object("Device", IAS_DEVICE_ID);
125 irias_add_string_attrib(obj, "DeviceName", "Linux", IAS_KERNEL_ATTR);
126
127 oct_seq[0] = 0x01; /* Version 1 */
128 oct_seq[1] = 0x00; /* IAS support bits */
129 oct_seq[2] = 0x00; /* LM-MUX support bits */
130 #ifdef CONFIG_IRDA_ULTRA
131 oct_seq[2] |= 0x04; /* Connectionless Data support */
132 #endif
133 irias_add_octseq_attrib(obj, "IrLMPSupport", oct_seq, 3,
134 IAS_KERNEL_ATTR);
135 irias_insert_object(obj);
136
137 /*
138 * Register server support with IrLMP so we can accept incoming
139 * connections
140 */
141 server = iriap_open(LSAP_IAS, IAS_SERVER, NULL, NULL);
142 if (!server) {
143 IRDA_DEBUG(0, "%s(), unable to open server\n", __func__);
144 return -1;
145 }
146 iriap_register_lsap(server, LSAP_IAS, IAS_SERVER);
147
148 return 0;
149 }
150
151 /*
152 * Function iriap_cleanup (void)
153 *
154 * Initializes the IrIAP layer, called by the module cleanup code in
155 * irmod.c
156 */
157 void iriap_cleanup(void)
158 {
159 irlmp_unregister_service(service_handle);
160
161 hashbin_delete(iriap, (FREE_FUNC) __iriap_close);
162 hashbin_delete(irias_objects, (FREE_FUNC) __irias_delete_object);
163 }
164
165 /*
166 * Function iriap_open (void)
167 *
168 * Opens an instance of the IrIAP layer, and registers with IrLMP
169 */
170 struct iriap_cb *iriap_open(__u8 slsap_sel, int mode, void *priv,
171 CONFIRM_CALLBACK callback)
172 {
173 struct iriap_cb *self;
174
175 IRDA_DEBUG(2, "%s()\n", __func__);
176
177 self = kzalloc(sizeof(*self), GFP_ATOMIC);
178 if (!self) {
179 IRDA_WARNING("%s: Unable to kmalloc!\n", __func__);
180 return NULL;
181 }
182
183 /*
184 * Initialize instance
185 */
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", __func__);
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", __func__);
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", __func__);
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", __func__);
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", __func__, 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", __func__);
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", __func__);
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", __func__);
345
346 IRDA_ASSERT(self != NULL, return;);
347 IRDA_ASSERT(self->magic == IAS_MAGIC, return;);
348
349 tx_skb = alloc_skb(LMP_MAX_HEADER, GFP_ATOMIC);
350 if (tx_skb == NULL) {
351 IRDA_DEBUG(0,
352 "%s(), Could not allocate an sk_buff of length %d\n",
353 __func__, LMP_MAX_HEADER);
354 return;
355 }
356
357 /*
358 * Reserve space for MUX control and LAP header
359 */
360 skb_reserve(tx_skb, LMP_MAX_HEADER);
361
362 irlmp_disconnect_request(self->lsap, tx_skb);
363 }
364
365 /*
366 * Function iriap_getvaluebyclass (addr, name, attr)
367 *
368 * Retrieve all values from attribute in all objects with given class
369 * name
370 */
371 int iriap_getvaluebyclass_request(struct iriap_cb *self,
372 __u32 saddr, __u32 daddr,
373 char *name, char *attr)
374 {
375 struct sk_buff *tx_skb;
376 int name_len, attr_len, skb_len;
377 __u8 *frame;
378
379 IRDA_ASSERT(self != NULL, return -1;);
380 IRDA_ASSERT(self->magic == IAS_MAGIC, return -1;);
381
382 /* Client must supply the destination device address */
383 if (!daddr)
384 return -1;
385
386 self->daddr = daddr;
387 self->saddr = saddr;
388
389 /*
390 * Save operation, so we know what the later indication is about
391 */
392 self->operation = GET_VALUE_BY_CLASS;
393
394 /* Give ourselves 10 secs to finish this operation */
395 iriap_start_watchdog_timer(self, 10*HZ);
396
397 name_len = strlen(name); /* Up to IAS_MAX_CLASSNAME = 60 */
398 attr_len = strlen(attr); /* Up to IAS_MAX_ATTRIBNAME = 60 */
399
400 skb_len = self->max_header_size+2+name_len+1+attr_len+4;
401 tx_skb = alloc_skb(skb_len, GFP_ATOMIC);
402 if (!tx_skb)
403 return -ENOMEM;
404
405 /* Reserve space for MUX and LAP header */
406 skb_reserve(tx_skb, self->max_header_size);
407 skb_put(tx_skb, 3+name_len+attr_len);
408 frame = tx_skb->data;
409
410 /* Build frame */
411 frame[0] = IAP_LST | GET_VALUE_BY_CLASS;
412 frame[1] = name_len; /* Insert length of name */
413 memcpy(frame+2, name, name_len); /* Insert name */
414 frame[2+name_len] = attr_len; /* Insert length of attr */
415 memcpy(frame+3+name_len, attr, attr_len); /* Insert attr */
416
417 iriap_do_client_event(self, IAP_CALL_REQUEST_GVBC, tx_skb);
418
419 /* Drop reference count - see state_s_disconnect(). */
420 dev_kfree_skb(tx_skb);
421
422 return 0;
423 }
424 EXPORT_SYMBOL(iriap_getvaluebyclass_request);
425
426 /*
427 * Function iriap_getvaluebyclass_confirm (self, skb)
428 *
429 * Got result from GetValueByClass command. Parse it and return result
430 * to service user.
431 *
432 */
433 static void iriap_getvaluebyclass_confirm(struct iriap_cb *self,
434 struct sk_buff *skb)
435 {
436 struct ias_value *value;
437 int charset;
438 __u32 value_len;
439 __u32 tmp_cpu32;
440 __u16 obj_id;
441 __u16 len;
442 __u8 type;
443 __u8 *fp;
444 int n;
445
446 IRDA_ASSERT(self != NULL, return;);
447 IRDA_ASSERT(self->magic == IAS_MAGIC, return;);
448 IRDA_ASSERT(skb != NULL, return;);
449
450 /* Initialize variables */
451 fp = skb->data;
452 n = 2;
453
454 /* Get length, MSB first */
455 len = get_unaligned_be16(fp + n);
456 n += 2;
457
458 IRDA_DEBUG(4, "%s(), len=%d\n", __func__, len);
459
460 /* Get object ID, MSB first */
461 obj_id = get_unaligned_be16(fp + n);
462 n += 2;
463
464 type = fp[n++];
465 IRDA_DEBUG(4, "%s(), Value type = %d\n", __func__, type);
466
467 switch (type) {
468 case IAS_INTEGER:
469 memcpy(&tmp_cpu32, fp+n, 4); n += 4;
470 be32_to_cpus(&tmp_cpu32);
471 value = irias_new_integer_value(tmp_cpu32);
472
473 /* Legal values restricted to 0x01-0x6f, page 15 irttp */
474 IRDA_DEBUG(4, "%s(), lsap=%d\n", __func__, value->t.integer);
475 break;
476 case IAS_STRING:
477 charset = fp[n++];
478
479 switch (charset) {
480 case CS_ASCII:
481 break;
482 /* case CS_ISO_8859_1: */
483 /* case CS_ISO_8859_2: */
484 /* case CS_ISO_8859_3: */
485 /* case CS_ISO_8859_4: */
486 /* case CS_ISO_8859_5: */
487 /* case CS_ISO_8859_6: */
488 /* case CS_ISO_8859_7: */
489 /* case CS_ISO_8859_8: */
490 /* case CS_ISO_8859_9: */
491 /* case CS_UNICODE: */
492 default:
493 IRDA_DEBUG(0, "%s(), charset %s, not supported\n",
494 __func__, ias_charset_types[charset]);
495
496 /* Aborting, close connection! */
497 iriap_disconnect_request(self);
498 return;
499 /* break; */
500 }
501 value_len = fp[n++];
502 IRDA_DEBUG(4, "%s(), strlen=%d\n", __func__, value_len);
503
504 /* Make sure the string is null-terminated */
505 fp[n+value_len] = 0x00;
506 IRDA_DEBUG(4, "Got string %s\n", fp+n);
507
508 /* Will truncate to IAS_MAX_STRING bytes */
509 value = irias_new_string_value(fp+n);
510 break;
511 case IAS_OCT_SEQ:
512 value_len = get_unaligned_be16(fp + n);
513 n += 2;
514
515 /* Will truncate to IAS_MAX_OCTET_STRING bytes */
516 value = irias_new_octseq_value(fp+n, value_len);
517 break;
518 default:
519 value = irias_new_missing_value();
520 break;
521 }
522
523 /* Finished, close connection! */
524 iriap_disconnect_request(self);
525
526 /* Warning, the client might close us, so remember no to use self
527 * anymore after calling confirm
528 */
529 if (self->confirm)
530 self->confirm(IAS_SUCCESS, obj_id, value, self->priv);
531 else {
532 IRDA_DEBUG(0, "%s(), missing handler!\n", __func__);
533 irias_delete_value(value);
534 }
535 }
536
537 /*
538 * Function iriap_getvaluebyclass_response ()
539 *
540 * Send answer back to remote LM-IAS
541 *
542 */
543 static void iriap_getvaluebyclass_response(struct iriap_cb *self,
544 __u16 obj_id,
545 __u8 ret_code,
546 struct ias_value *value)
547 {
548 struct sk_buff *tx_skb;
549 int n;
550 __be32 tmp_be32;
551 __be16 tmp_be16;
552 __u8 *fp;
553
554 IRDA_DEBUG(4, "%s()\n", __func__);
555
556 IRDA_ASSERT(self != NULL, return;);
557 IRDA_ASSERT(self->magic == IAS_MAGIC, return;);
558 IRDA_ASSERT(value != NULL, return;);
559 IRDA_ASSERT(value->len <= 1024, return;);
560
561 /* Initialize variables */
562 n = 0;
563
564 /*
565 * We must adjust the size of the response after the length of the
566 * value. We add 32 bytes because of the 6 bytes for the frame and
567 * max 5 bytes for the value coding.
568 */
569 tx_skb = alloc_skb(value->len + self->max_header_size + 32,
570 GFP_ATOMIC);
571 if (!tx_skb)
572 return;
573
574 /* Reserve space for MUX and LAP header */
575 skb_reserve(tx_skb, self->max_header_size);
576 skb_put(tx_skb, 6);
577
578 fp = tx_skb->data;
579
580 /* Build frame */
581 fp[n++] = GET_VALUE_BY_CLASS | IAP_LST;
582 fp[n++] = ret_code;
583
584 /* Insert list length (MSB first) */
585 tmp_be16 = htons(0x0001);
586 memcpy(fp+n, &tmp_be16, 2); n += 2;
587
588 /* Insert object identifier ( MSB first) */
589 tmp_be16 = cpu_to_be16(obj_id);
590 memcpy(fp+n, &tmp_be16, 2); n += 2;
591
592 switch (value->type) {
593 case IAS_STRING:
594 skb_put(tx_skb, 3 + value->len);
595 fp[n++] = value->type;
596 fp[n++] = 0; /* ASCII */
597 fp[n++] = (__u8) value->len;
598 memcpy(fp+n, value->t.string, value->len); n+=value->len;
599 break;
600 case IAS_INTEGER:
601 skb_put(tx_skb, 5);
602 fp[n++] = value->type;
603
604 tmp_be32 = cpu_to_be32(value->t.integer);
605 memcpy(fp+n, &tmp_be32, 4); n += 4;
606 break;
607 case IAS_OCT_SEQ:
608 skb_put(tx_skb, 3 + value->len);
609 fp[n++] = value->type;
610
611 tmp_be16 = cpu_to_be16(value->len);
612 memcpy(fp+n, &tmp_be16, 2); n += 2;
613 memcpy(fp+n, value->t.oct_seq, value->len); n+=value->len;
614 break;
615 case IAS_MISSING:
616 IRDA_DEBUG( 3, "%s: sending IAS_MISSING\n", __func__);
617 skb_put(tx_skb, 1);
618 fp[n++] = value->type;
619 break;
620 default:
621 IRDA_DEBUG(0, "%s(), type not implemented!\n", __func__);
622 break;
623 }
624 iriap_do_r_connect_event(self, IAP_CALL_RESPONSE, tx_skb);
625
626 /* Drop reference count - see state_r_execute(). */
627 dev_kfree_skb(tx_skb);
628 }
629
630 /*
631 * Function iriap_getvaluebyclass_indication (self, skb)
632 *
633 * getvaluebyclass is requested from peer LM-IAS
634 *
635 */
636 static void iriap_getvaluebyclass_indication(struct iriap_cb *self,
637 struct sk_buff *skb)
638 {
639 struct ias_object *obj;
640 struct ias_attrib *attrib;
641 int name_len;
642 int attr_len;
643 char name[IAS_MAX_CLASSNAME + 1]; /* 60 bytes */
644 char attr[IAS_MAX_ATTRIBNAME + 1]; /* 60 bytes */
645 __u8 *fp;
646 int n;
647
648 IRDA_DEBUG(4, "%s()\n", __func__);
649
650 IRDA_ASSERT(self != NULL, return;);
651 IRDA_ASSERT(self->magic == IAS_MAGIC, return;);
652 IRDA_ASSERT(skb != NULL, return;);
653
654 fp = skb->data;
655 n = 1;
656
657 name_len = fp[n++];
658 memcpy(name, fp+n, name_len); n+=name_len;
659 name[name_len] = '\0';
660
661 attr_len = fp[n++];
662 memcpy(attr, fp+n, attr_len); n+=attr_len;
663 attr[attr_len] = '\0';
664
665 IRDA_DEBUG(4, "LM-IAS: Looking up %s: %s\n", name, attr);
666 obj = irias_find_object(name);
667
668 if (obj == NULL) {
669 IRDA_DEBUG(2, "LM-IAS: Object %s not found\n", name);
670 iriap_getvaluebyclass_response(self, 0x1235, IAS_CLASS_UNKNOWN,
671 &irias_missing);
672 return;
673 }
674 IRDA_DEBUG(4, "LM-IAS: found %s, id=%d\n", obj->name, obj->id);
675
676 attrib = irias_find_attrib(obj, attr);
677 if (attrib == NULL) {
678 IRDA_DEBUG(2, "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_DEBUG(2, "%s()\n", __func__);
702
703 IRDA_ASSERT(self != NULL, return;);
704 IRDA_ASSERT(self->magic == IAS_MAGIC, return;);
705
706 tx_skb = alloc_skb(LMP_MAX_HEADER + 1, GFP_ATOMIC);
707 if (!tx_skb)
708 return;
709
710 /* Reserve space for MUX and LAP header */
711 skb_reserve(tx_skb, self->max_header_size);
712 skb_put(tx_skb, 1);
713 frame = tx_skb->data;
714
715 /* Build frame */
716 frame[0] = IAP_LST | IAP_ACK | self->operation;
717
718 irlmp_data_request(self->lsap, tx_skb);
719 }
720
721 void iriap_connect_request(struct iriap_cb *self)
722 {
723 int ret;
724
725 IRDA_ASSERT(self != NULL, return;);
726 IRDA_ASSERT(self->magic == IAS_MAGIC, return;);
727
728 ret = irlmp_connect_request(self->lsap, LSAP_IAS,
729 self->saddr, self->daddr,
730 NULL, NULL);
731 if (ret < 0) {
732 IRDA_DEBUG(0, "%s(), connect failed!\n", __func__);
733 self->confirm(IAS_DISCONNECT, 0, NULL, self->priv);
734 }
735 }
736
737 /*
738 * Function iriap_connect_confirm (handle, skb)
739 *
740 * LSAP connection confirmed!
741 *
742 */
743 static void iriap_connect_confirm(void *instance, void *sap,
744 struct qos_info *qos, __u32 max_seg_size,
745 __u8 max_header_size,
746 struct sk_buff *skb)
747 {
748 struct iriap_cb *self;
749
750 self = (struct iriap_cb *) instance;
751
752 IRDA_ASSERT(self != NULL, return;);
753 IRDA_ASSERT(self->magic == IAS_MAGIC, return;);
754 IRDA_ASSERT(skb != NULL, return;);
755
756 self->max_data_size = max_seg_size;
757 self->max_header_size = max_header_size;
758
759 del_timer(&self->watchdog_timer);
760
761 iriap_do_client_event(self, IAP_LM_CONNECT_CONFIRM, skb);
762
763 /* Drop reference count - see state_s_make_call(). */
764 dev_kfree_skb(skb);
765 }
766
767 /*
768 * Function iriap_connect_indication ( handle, skb)
769 *
770 * Remote LM-IAS is requesting connection
771 *
772 */
773 static void iriap_connect_indication(void *instance, void *sap,
774 struct qos_info *qos, __u32 max_seg_size,
775 __u8 max_header_size,
776 struct sk_buff *skb)
777 {
778 struct iriap_cb *self, *new;
779
780 IRDA_DEBUG(1, "%s()\n", __func__);
781
782 self = (struct iriap_cb *) instance;
783
784 IRDA_ASSERT(skb != NULL, return;);
785 IRDA_ASSERT(self != NULL, goto out;);
786 IRDA_ASSERT(self->magic == IAS_MAGIC, goto out;);
787
788 /* Start new server */
789 new = iriap_open(LSAP_IAS, IAS_SERVER, NULL, NULL);
790 if (!new) {
791 IRDA_DEBUG(0, "%s(), open failed\n", __func__);
792 goto out;
793 }
794
795 /* Now attach up the new "socket" */
796 new->lsap = irlmp_dup(self->lsap, new);
797 if (!new->lsap) {
798 IRDA_DEBUG(0, "%s(), dup failed!\n", __func__);
799 goto out;
800 }
801
802 new->max_data_size = max_seg_size;
803 new->max_header_size = max_header_size;
804
805 /* Clean up the original one to keep it in listen state */
806 irlmp_listen(self->lsap);
807
808 iriap_do_server_event(new, IAP_LM_CONNECT_INDICATION, skb);
809
810 out:
811 /* Drop reference count - see state_r_disconnect(). */
812 dev_kfree_skb(skb);
813 }
814
815 /*
816 * Function iriap_data_indication (handle, skb)
817 *
818 * Receives data from connection identified by handle from IrLMP
819 *
820 */
821 static int iriap_data_indication(void *instance, void *sap,
822 struct sk_buff *skb)
823 {
824 struct iriap_cb *self;
825 __u8 *frame;
826 __u8 opcode;
827
828 IRDA_DEBUG(3, "%s()\n", __func__);
829
830 self = (struct iriap_cb *) instance;
831
832 IRDA_ASSERT(skb != NULL, return 0;);
833 IRDA_ASSERT(self != NULL, goto out;);
834 IRDA_ASSERT(self->magic == IAS_MAGIC, goto out;);
835
836 frame = skb->data;
837
838 if (self->mode == IAS_SERVER) {
839 /* Call server */
840 IRDA_DEBUG(4, "%s(), Calling server!\n", __func__);
841 iriap_do_r_connect_event(self, IAP_RECV_F_LST, skb);
842 goto out;
843 }
844 opcode = frame[0];
845 if (~opcode & IAP_LST) {
846 IRDA_WARNING("%s:, IrIAS multiframe commands or "
847 "results is not implemented yet!\n",
848 __func__);
849 goto out;
850 }
851
852 /* Check for ack frames since they don't contain any data */
853 if (opcode & IAP_ACK) {
854 IRDA_DEBUG(0, "%s() Got ack frame!\n", __func__);
855 goto out;
856 }
857
858 opcode &= ~IAP_LST; /* Mask away LST bit */
859
860 switch (opcode) {
861 case GET_INFO_BASE:
862 IRDA_DEBUG(0, "IrLMP GetInfoBaseDetails not implemented!\n");
863 break;
864 case GET_VALUE_BY_CLASS:
865 iriap_do_call_event(self, IAP_RECV_F_LST, NULL);
866
867 switch (frame[1]) {
868 case IAS_SUCCESS:
869 iriap_getvaluebyclass_confirm(self, skb);
870 break;
871 case IAS_CLASS_UNKNOWN:
872 IRDA_DEBUG(1, "%s(), No such class!\n", __func__);
873 /* Finished, close connection! */
874 iriap_disconnect_request(self);
875
876 /*
877 * Warning, the client might close us, so remember
878 * no to use self anymore after calling confirm
879 */
880 if (self->confirm)
881 self->confirm(IAS_CLASS_UNKNOWN, 0, NULL,
882 self->priv);
883 break;
884 case IAS_ATTRIB_UNKNOWN:
885 IRDA_DEBUG(1, "%s(), No such attribute!\n", __func__);
886 /* Finished, close connection! */
887 iriap_disconnect_request(self);
888
889 /*
890 * Warning, the client might close us, so remember
891 * no to use self anymore after calling confirm
892 */
893 if (self->confirm)
894 self->confirm(IAS_ATTRIB_UNKNOWN, 0, NULL,
895 self->priv);
896 break;
897 }
898 break;
899 default:
900 IRDA_DEBUG(0, "%s(), Unknown op-code: %02x\n", __func__,
901 opcode);
902 break;
903 }
904
905 out:
906 /* Cleanup - sub-calls will have done skb_get() as needed. */
907 dev_kfree_skb(skb);
908 return 0;
909 }
910
911 /*
912 * Function iriap_call_indication (self, skb)
913 *
914 * Received call to server from peer LM-IAS
915 *
916 */
917 void iriap_call_indication(struct iriap_cb *self, struct sk_buff *skb)
918 {
919 __u8 *fp;
920 __u8 opcode;
921
922 IRDA_DEBUG(4, "%s()\n", __func__);
923
924 IRDA_ASSERT(self != NULL, return;);
925 IRDA_ASSERT(self->magic == IAS_MAGIC, return;);
926 IRDA_ASSERT(skb != NULL, return;);
927
928 fp = skb->data;
929
930 opcode = fp[0];
931 if (~opcode & 0x80) {
932 IRDA_WARNING("%s: IrIAS multiframe commands or results "
933 "is not implemented yet!\n", __func__);
934 return;
935 }
936 opcode &= 0x7f; /* Mask away LST bit */
937
938 switch (opcode) {
939 case GET_INFO_BASE:
940 IRDA_WARNING("%s: GetInfoBaseDetails not implemented yet!\n",
941 __func__);
942 break;
943 case GET_VALUE_BY_CLASS:
944 iriap_getvaluebyclass_indication(self, skb);
945 break;
946 }
947 /* skb will be cleaned up in iriap_data_indication */
948 }
949
950 /*
951 * Function iriap_watchdog_timer_expired (data)
952 *
953 * Query has taken too long time, so abort
954 *
955 */
956 static void iriap_watchdog_timer_expired(void *data)
957 {
958 struct iriap_cb *self = (struct iriap_cb *) data;
959
960 IRDA_ASSERT(self != NULL, return;);
961 IRDA_ASSERT(self->magic == IAS_MAGIC, return;);
962
963 /* iriap_close(self); */
964 }
965
966 #ifdef CONFIG_PROC_FS
967
968 static const char *const ias_value_types[] = {
969 "IAS_MISSING",
970 "IAS_INTEGER",
971 "IAS_OCT_SEQ",
972 "IAS_STRING"
973 };
974
975 static inline struct ias_object *irias_seq_idx(loff_t pos)
976 {
977 struct ias_object *obj;
978
979 for (obj = (struct ias_object *) hashbin_get_first(irias_objects);
980 obj; obj = (struct ias_object *) hashbin_get_next(irias_objects)) {
981 if (pos-- == 0)
982 break;
983 }
984
985 return obj;
986 }
987
988 static void *irias_seq_start(struct seq_file *seq, loff_t *pos)
989 {
990 spin_lock_irq(&irias_objects->hb_spinlock);
991
992 return *pos ? irias_seq_idx(*pos - 1) : SEQ_START_TOKEN;
993 }
994
995 static void *irias_seq_next(struct seq_file *seq, void *v, loff_t *pos)
996 {
997 ++*pos;
998
999 return (v == SEQ_START_TOKEN)
1000 ? (void *) hashbin_get_first(irias_objects)
1001 : (void *) hashbin_get_next(irias_objects);
1002 }
1003
1004 static void irias_seq_stop(struct seq_file *seq, void *v)
1005 {
1006 spin_unlock_irq(&irias_objects->hb_spinlock);
1007 }
1008
1009 static int irias_seq_show(struct seq_file *seq, void *v)
1010 {
1011 if (v == SEQ_START_TOKEN)
1012 seq_puts(seq, "LM-IAS Objects:\n");
1013 else {
1014 struct ias_object *obj = v;
1015 struct ias_attrib *attrib;
1016
1017 IRDA_ASSERT(obj->magic == IAS_OBJECT_MAGIC, return -EINVAL;);
1018
1019 seq_printf(seq, "name: %s, id=%d\n",
1020 obj->name, obj->id);
1021
1022 /* Careful for priority inversions here !
1023 * All other uses of attrib spinlock are independent of
1024 * the object spinlock, so we are safe. Jean II */
1025 spin_lock(&obj->attribs->hb_spinlock);
1026
1027 /* List all attributes for this object */
1028 for (attrib = (struct ias_attrib *) hashbin_get_first(obj->attribs);
1029 attrib != NULL;
1030 attrib = (struct ias_attrib *) hashbin_get_next(obj->attribs)) {
1031
1032 IRDA_ASSERT(attrib->magic == IAS_ATTRIB_MAGIC,
1033 goto outloop; );
1034
1035 seq_printf(seq, " - Attribute name: \"%s\", ",
1036 attrib->name);
1037 seq_printf(seq, "value[%s]: ",
1038 ias_value_types[attrib->value->type]);
1039
1040 switch (attrib->value->type) {
1041 case IAS_INTEGER:
1042 seq_printf(seq, "%d\n",
1043 attrib->value->t.integer);
1044 break;
1045 case IAS_STRING:
1046 seq_printf(seq, "\"%s\"\n",
1047 attrib->value->t.string);
1048 break;
1049 case IAS_OCT_SEQ:
1050 seq_printf(seq, "octet sequence (%d bytes)\n",
1051 attrib->value->len);
1052 break;
1053 case IAS_MISSING:
1054 seq_puts(seq, "missing\n");
1055 break;
1056 default:
1057 seq_printf(seq, "type %d?\n",
1058 attrib->value->type);
1059 }
1060 seq_putc(seq, '\n');
1061
1062 }
1063 IRDA_ASSERT_LABEL(outloop:)
1064 spin_unlock(&obj->attribs->hb_spinlock);
1065 }
1066
1067 return 0;
1068 }
1069
1070 static const struct seq_operations irias_seq_ops = {
1071 .start = irias_seq_start,
1072 .next = irias_seq_next,
1073 .stop = irias_seq_stop,
1074 .show = irias_seq_show,
1075 };
1076
1077 static int irias_seq_open(struct inode *inode, struct file *file)
1078 {
1079 IRDA_ASSERT( irias_objects != NULL, return -EINVAL;);
1080
1081 return seq_open(file, &irias_seq_ops);
1082 }
1083
1084 const struct file_operations irias_seq_fops = {
1085 .owner = THIS_MODULE,
1086 .open = irias_seq_open,
1087 .read = seq_read,
1088 .llseek = seq_lseek,
1089 .release = seq_release,
1090 };
1091
1092 #endif /* PROC_FS */
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