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FRV: Use generic show_interrupts()
[cris-mirror.git] / net / irda / iriap.c
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1 /*********************************************************************
2 *
3 * Filename: iriap.c
4 * Version: 0.8
5 * Description: Information Access Protocol (IAP)
6 * Status: Experimental.
7 * Author: Dag Brattli <dagb@cs.uit.no>
8 * Created at: Thu Aug 21 00:02:07 1997
9 * Modified at: Sat Dec 25 16:42:42 1999
10 * Modified by: Dag Brattli <dagb@cs.uit.no>
11 *
12 * Copyright (c) 1998-1999 Dag Brattli <dagb@cs.uit.no>,
13 * All Rights Reserved.
14 * Copyright (c) 2000-2003 Jean Tourrilhes <jt@hpl.hp.com>
15 *
16 * This program is free software; you can redistribute it and/or
17 * modify it under the terms of the GNU General Public License as
18 * published by the Free Software Foundation; either version 2 of
19 * the License, or (at your option) any later version.
20 *
21 * Neither Dag Brattli nor University of Tromsø admit liability nor
22 * provide warranty for any of this software. This material is
23 * provided "AS-IS" and at no charge.
24 *
25 ********************************************************************/
26
27 #include <linux/module.h>
28 #include <linux/types.h>
29 #include <linux/skbuff.h>
30 #include <linux/fs.h>
31 #include <linux/string.h>
32 #include <linux/init.h>
33 #include <linux/seq_file.h>
34 #include <linux/slab.h>
35
36 #include <asm/byteorder.h>
37 #include <asm/unaligned.h>
38
39 #include <net/irda/irda.h>
40 #include <net/irda/irttp.h>
41 #include <net/irda/irlmp.h>
42 #include <net/irda/irias_object.h>
43 #include <net/irda/iriap_event.h>
44 #include <net/irda/iriap.h>
45
46 #ifdef CONFIG_IRDA_DEBUG
47 /* FIXME: This one should go in irlmp.c */
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 if (n + value_len < skb->len)
506 fp[n + value_len] = 0x00;
507 IRDA_DEBUG(4, "Got string %s\n", fp+n);
508
509 /* Will truncate to IAS_MAX_STRING bytes */
510 value = irias_new_string_value(fp+n);
511 break;
512 case IAS_OCT_SEQ:
513 value_len = get_unaligned_be16(fp + n);
514 n += 2;
515
516 /* Will truncate to IAS_MAX_OCTET_STRING bytes */
517 value = irias_new_octseq_value(fp+n, value_len);
518 break;
519 default:
520 value = irias_new_missing_value();
521 break;
522 }
523
524 /* Finished, close connection! */
525 iriap_disconnect_request(self);
526
527 /* Warning, the client might close us, so remember no to use self
528 * anymore after calling confirm
529 */
530 if (self->confirm)
531 self->confirm(IAS_SUCCESS, obj_id, value, self->priv);
532 else {
533 IRDA_DEBUG(0, "%s(), missing handler!\n", __func__);
534 irias_delete_value(value);
535 }
536 }
537
538 /*
539 * Function iriap_getvaluebyclass_response ()
540 *
541 * Send answer back to remote LM-IAS
542 *
543 */
544 static void iriap_getvaluebyclass_response(struct iriap_cb *self,
545 __u16 obj_id,
546 __u8 ret_code,
547 struct ias_value *value)
548 {
549 struct sk_buff *tx_skb;
550 int n;
551 __be32 tmp_be32;
552 __be16 tmp_be16;
553 __u8 *fp;
554
555 IRDA_DEBUG(4, "%s()\n", __func__);
556
557 IRDA_ASSERT(self != NULL, return;);
558 IRDA_ASSERT(self->magic == IAS_MAGIC, return;);
559 IRDA_ASSERT(value != NULL, return;);
560 IRDA_ASSERT(value->len <= 1024, return;);
561
562 /* Initialize variables */
563 n = 0;
564
565 /*
566 * We must adjust the size of the response after the length of the
567 * value. We add 32 bytes because of the 6 bytes for the frame and
568 * max 5 bytes for the value coding.
569 */
570 tx_skb = alloc_skb(value->len + self->max_header_size + 32,
571 GFP_ATOMIC);
572 if (!tx_skb)
573 return;
574
575 /* Reserve space for MUX and LAP header */
576 skb_reserve(tx_skb, self->max_header_size);
577 skb_put(tx_skb, 6);
578
579 fp = tx_skb->data;
580
581 /* Build frame */
582 fp[n++] = GET_VALUE_BY_CLASS | IAP_LST;
583 fp[n++] = ret_code;
584
585 /* Insert list length (MSB first) */
586 tmp_be16 = htons(0x0001);
587 memcpy(fp+n, &tmp_be16, 2); n += 2;
588
589 /* Insert object identifier ( MSB first) */
590 tmp_be16 = cpu_to_be16(obj_id);
591 memcpy(fp+n, &tmp_be16, 2); n += 2;
592
593 switch (value->type) {
594 case IAS_STRING:
595 skb_put(tx_skb, 3 + value->len);
596 fp[n++] = value->type;
597 fp[n++] = 0; /* ASCII */
598 fp[n++] = (__u8) value->len;
599 memcpy(fp+n, value->t.string, value->len); n+=value->len;
600 break;
601 case IAS_INTEGER:
602 skb_put(tx_skb, 5);
603 fp[n++] = value->type;
604
605 tmp_be32 = cpu_to_be32(value->t.integer);
606 memcpy(fp+n, &tmp_be32, 4); n += 4;
607 break;
608 case IAS_OCT_SEQ:
609 skb_put(tx_skb, 3 + value->len);
610 fp[n++] = value->type;
611
612 tmp_be16 = cpu_to_be16(value->len);
613 memcpy(fp+n, &tmp_be16, 2); n += 2;
614 memcpy(fp+n, value->t.oct_seq, value->len); n+=value->len;
615 break;
616 case IAS_MISSING:
617 IRDA_DEBUG( 3, "%s: sending IAS_MISSING\n", __func__);
618 skb_put(tx_skb, 1);
619 fp[n++] = value->type;
620 break;
621 default:
622 IRDA_DEBUG(0, "%s(), type not implemented!\n", __func__);
623 break;
624 }
625 iriap_do_r_connect_event(self, IAP_CALL_RESPONSE, tx_skb);
626
627 /* Drop reference count - see state_r_execute(). */
628 dev_kfree_skb(tx_skb);
629 }
630
631 /*
632 * Function iriap_getvaluebyclass_indication (self, skb)
633 *
634 * getvaluebyclass is requested from peer LM-IAS
635 *
636 */
637 static void iriap_getvaluebyclass_indication(struct iriap_cb *self,
638 struct sk_buff *skb)
639 {
640 struct ias_object *obj;
641 struct ias_attrib *attrib;
642 int name_len;
643 int attr_len;
644 char name[IAS_MAX_CLASSNAME + 1]; /* 60 bytes */
645 char attr[IAS_MAX_ATTRIBNAME + 1]; /* 60 bytes */
646 __u8 *fp;
647 int n;
648
649 IRDA_DEBUG(4, "%s()\n", __func__);
650
651 IRDA_ASSERT(self != NULL, return;);
652 IRDA_ASSERT(self->magic == IAS_MAGIC, return;);
653 IRDA_ASSERT(skb != NULL, return;);
654
655 fp = skb->data;
656 n = 1;
657
658 name_len = fp[n++];
659 memcpy(name, fp+n, name_len); n+=name_len;
660 name[name_len] = '\0';
661
662 attr_len = fp[n++];
663 memcpy(attr, fp+n, attr_len); n+=attr_len;
664 attr[attr_len] = '\0';
665
666 IRDA_DEBUG(4, "LM-IAS: Looking up %s: %s\n", name, attr);
667 obj = irias_find_object(name);
668
669 if (obj == NULL) {
670 IRDA_DEBUG(2, "LM-IAS: Object %s not found\n", name);
671 iriap_getvaluebyclass_response(self, 0x1235, IAS_CLASS_UNKNOWN,
672 &irias_missing);
673 return;
674 }
675 IRDA_DEBUG(4, "LM-IAS: found %s, id=%d\n", obj->name, obj->id);
676
677 attrib = irias_find_attrib(obj, attr);
678 if (attrib == NULL) {
679 IRDA_DEBUG(2, "LM-IAS: Attribute %s not found\n", attr);
680 iriap_getvaluebyclass_response(self, obj->id,
681 IAS_ATTRIB_UNKNOWN,
682 &irias_missing);
683 return;
684 }
685
686 /* We have a match; send the value. */
687 iriap_getvaluebyclass_response(self, obj->id, IAS_SUCCESS,
688 attrib->value);
689 }
690
691 /*
692 * Function iriap_send_ack (void)
693 *
694 * Currently not used
695 *
696 */
697 void iriap_send_ack(struct iriap_cb *self)
698 {
699 struct sk_buff *tx_skb;
700 __u8 *frame;
701
702 IRDA_DEBUG(2, "%s()\n", __func__);
703
704 IRDA_ASSERT(self != NULL, return;);
705 IRDA_ASSERT(self->magic == IAS_MAGIC, return;);
706
707 tx_skb = alloc_skb(LMP_MAX_HEADER + 1, GFP_ATOMIC);
708 if (!tx_skb)
709 return;
710
711 /* Reserve space for MUX and LAP header */
712 skb_reserve(tx_skb, self->max_header_size);
713 skb_put(tx_skb, 1);
714 frame = tx_skb->data;
715
716 /* Build frame */
717 frame[0] = IAP_LST | IAP_ACK | self->operation;
718
719 irlmp_data_request(self->lsap, tx_skb);
720 }
721
722 void iriap_connect_request(struct iriap_cb *self)
723 {
724 int ret;
725
726 IRDA_ASSERT(self != NULL, return;);
727 IRDA_ASSERT(self->magic == IAS_MAGIC, return;);
728
729 ret = irlmp_connect_request(self->lsap, LSAP_IAS,
730 self->saddr, self->daddr,
731 NULL, NULL);
732 if (ret < 0) {
733 IRDA_DEBUG(0, "%s(), connect failed!\n", __func__);
734 self->confirm(IAS_DISCONNECT, 0, NULL, self->priv);
735 }
736 }
737
738 /*
739 * Function iriap_connect_confirm (handle, skb)
740 *
741 * LSAP connection confirmed!
742 *
743 */
744 static void iriap_connect_confirm(void *instance, void *sap,
745 struct qos_info *qos, __u32 max_seg_size,
746 __u8 max_header_size,
747 struct sk_buff *skb)
748 {
749 struct iriap_cb *self;
750
751 self = (struct iriap_cb *) instance;
752
753 IRDA_ASSERT(self != NULL, return;);
754 IRDA_ASSERT(self->magic == IAS_MAGIC, return;);
755 IRDA_ASSERT(skb != NULL, return;);
756
757 self->max_data_size = max_seg_size;
758 self->max_header_size = max_header_size;
759
760 del_timer(&self->watchdog_timer);
761
762 iriap_do_client_event(self, IAP_LM_CONNECT_CONFIRM, skb);
763
764 /* Drop reference count - see state_s_make_call(). */
765 dev_kfree_skb(skb);
766 }
767
768 /*
769 * Function iriap_connect_indication ( handle, skb)
770 *
771 * Remote LM-IAS is requesting connection
772 *
773 */
774 static void iriap_connect_indication(void *instance, void *sap,
775 struct qos_info *qos, __u32 max_seg_size,
776 __u8 max_header_size,
777 struct sk_buff *skb)
778 {
779 struct iriap_cb *self, *new;
780
781 IRDA_DEBUG(1, "%s()\n", __func__);
782
783 self = (struct iriap_cb *) instance;
784
785 IRDA_ASSERT(skb != NULL, return;);
786 IRDA_ASSERT(self != NULL, goto out;);
787 IRDA_ASSERT(self->magic == IAS_MAGIC, goto out;);
788
789 /* Start new server */
790 new = iriap_open(LSAP_IAS, IAS_SERVER, NULL, NULL);
791 if (!new) {
792 IRDA_DEBUG(0, "%s(), open failed\n", __func__);
793 goto out;
794 }
795
796 /* Now attach up the new "socket" */
797 new->lsap = irlmp_dup(self->lsap, new);
798 if (!new->lsap) {
799 IRDA_DEBUG(0, "%s(), dup failed!\n", __func__);
800 goto out;
801 }
802
803 new->max_data_size = max_seg_size;
804 new->max_header_size = max_header_size;
805
806 /* Clean up the original one to keep it in listen state */
807 irlmp_listen(self->lsap);
808
809 iriap_do_server_event(new, IAP_LM_CONNECT_INDICATION, skb);
810
811 out:
812 /* Drop reference count - see state_r_disconnect(). */
813 dev_kfree_skb(skb);
814 }
815
816 /*
817 * Function iriap_data_indication (handle, skb)
818 *
819 * Receives data from connection identified by handle from IrLMP
820 *
821 */
822 static int iriap_data_indication(void *instance, void *sap,
823 struct sk_buff *skb)
824 {
825 struct iriap_cb *self;
826 __u8 *frame;
827 __u8 opcode;
828
829 IRDA_DEBUG(3, "%s()\n", __func__);
830
831 self = (struct iriap_cb *) instance;
832
833 IRDA_ASSERT(skb != NULL, return 0;);
834 IRDA_ASSERT(self != NULL, goto out;);
835 IRDA_ASSERT(self->magic == IAS_MAGIC, goto out;);
836
837 frame = skb->data;
838
839 if (self->mode == IAS_SERVER) {
840 /* Call server */
841 IRDA_DEBUG(4, "%s(), Calling server!\n", __func__);
842 iriap_do_r_connect_event(self, IAP_RECV_F_LST, skb);
843 goto out;
844 }
845 opcode = frame[0];
846 if (~opcode & IAP_LST) {
847 IRDA_WARNING("%s:, IrIAS multiframe commands or "
848 "results is not implemented yet!\n",
849 __func__);
850 goto out;
851 }
852
853 /* Check for ack frames since they don't contain any data */
854 if (opcode & IAP_ACK) {
855 IRDA_DEBUG(0, "%s() Got ack frame!\n", __func__);
856 goto out;
857 }
858
859 opcode &= ~IAP_LST; /* Mask away LST bit */
860
861 switch (opcode) {
862 case GET_INFO_BASE:
863 IRDA_DEBUG(0, "IrLMP GetInfoBaseDetails not implemented!\n");
864 break;
865 case GET_VALUE_BY_CLASS:
866 iriap_do_call_event(self, IAP_RECV_F_LST, NULL);
867
868 switch (frame[1]) {
869 case IAS_SUCCESS:
870 iriap_getvaluebyclass_confirm(self, skb);
871 break;
872 case IAS_CLASS_UNKNOWN:
873 IRDA_DEBUG(1, "%s(), No such class!\n", __func__);
874 /* Finished, close connection! */
875 iriap_disconnect_request(self);
876
877 /*
878 * Warning, the client might close us, so remember
879 * no to use self anymore after calling confirm
880 */
881 if (self->confirm)
882 self->confirm(IAS_CLASS_UNKNOWN, 0, NULL,
883 self->priv);
884 break;
885 case IAS_ATTRIB_UNKNOWN:
886 IRDA_DEBUG(1, "%s(), No such attribute!\n", __func__);
887 /* Finished, close connection! */
888 iriap_disconnect_request(self);
889
890 /*
891 * Warning, the client might close us, so remember
892 * no to use self anymore after calling confirm
893 */
894 if (self->confirm)
895 self->confirm(IAS_ATTRIB_UNKNOWN, 0, NULL,
896 self->priv);
897 break;
898 }
899 break;
900 default:
901 IRDA_DEBUG(0, "%s(), Unknown op-code: %02x\n", __func__,
902 opcode);
903 break;
904 }
905
906 out:
907 /* Cleanup - sub-calls will have done skb_get() as needed. */
908 dev_kfree_skb(skb);
909 return 0;
910 }
911
912 /*
913 * Function iriap_call_indication (self, skb)
914 *
915 * Received call to server from peer LM-IAS
916 *
917 */
918 void iriap_call_indication(struct iriap_cb *self, struct sk_buff *skb)
919 {
920 __u8 *fp;
921 __u8 opcode;
922
923 IRDA_DEBUG(4, "%s()\n", __func__);
924
925 IRDA_ASSERT(self != NULL, return;);
926 IRDA_ASSERT(self->magic == IAS_MAGIC, return;);
927 IRDA_ASSERT(skb != NULL, return;);
928
929 fp = skb->data;
930
931 opcode = fp[0];
932 if (~opcode & 0x80) {
933 IRDA_WARNING("%s: IrIAS multiframe commands or results "
934 "is not implemented yet!\n", __func__);
935 return;
936 }
937 opcode &= 0x7f; /* Mask away LST bit */
938
939 switch (opcode) {
940 case GET_INFO_BASE:
941 IRDA_WARNING("%s: GetInfoBaseDetails not implemented yet!\n",
942 __func__);
943 break;
944 case GET_VALUE_BY_CLASS:
945 iriap_getvaluebyclass_indication(self, skb);
946 break;
947 }
948 /* skb will be cleaned up in iriap_data_indication */
949 }
950
951 /*
952 * Function iriap_watchdog_timer_expired (data)
953 *
954 * Query has taken too long time, so abort
955 *
956 */
957 static void iriap_watchdog_timer_expired(void *data)
958 {
959 struct iriap_cb *self = (struct iriap_cb *) data;
960
961 IRDA_ASSERT(self != NULL, return;);
962 IRDA_ASSERT(self->magic == IAS_MAGIC, return;);
963
964 /* iriap_close(self); */
965 }
966
967 #ifdef CONFIG_PROC_FS
968
969 static const char *const ias_value_types[] = {
970 "IAS_MISSING",
971 "IAS_INTEGER",
972 "IAS_OCT_SEQ",
973 "IAS_STRING"
974 };
975
976 static inline struct ias_object *irias_seq_idx(loff_t pos)
977 {
978 struct ias_object *obj;
979
980 for (obj = (struct ias_object *) hashbin_get_first(irias_objects);
981 obj; obj = (struct ias_object *) hashbin_get_next(irias_objects)) {
982 if (pos-- == 0)
983 break;
984 }
985
986 return obj;
987 }
988
989 static void *irias_seq_start(struct seq_file *seq, loff_t *pos)
990 {
991 spin_lock_irq(&irias_objects->hb_spinlock);
992
993 return *pos ? irias_seq_idx(*pos - 1) : SEQ_START_TOKEN;
994 }
995
996 static void *irias_seq_next(struct seq_file *seq, void *v, loff_t *pos)
997 {
998 ++*pos;
999
1000 return (v == SEQ_START_TOKEN)
1001 ? (void *) hashbin_get_first(irias_objects)
1002 : (void *) hashbin_get_next(irias_objects);
1003 }
1004
1005 static void irias_seq_stop(struct seq_file *seq, void *v)
1006 {
1007 spin_unlock_irq(&irias_objects->hb_spinlock);
1008 }
1009
1010 static int irias_seq_show(struct seq_file *seq, void *v)
1011 {
1012 if (v == SEQ_START_TOKEN)
1013 seq_puts(seq, "LM-IAS Objects:\n");
1014 else {
1015 struct ias_object *obj = v;
1016 struct ias_attrib *attrib;
1017
1018 IRDA_ASSERT(obj->magic == IAS_OBJECT_MAGIC, return -EINVAL;);
1019
1020 seq_printf(seq, "name: %s, id=%d\n",
1021 obj->name, obj->id);
1022
1023 /* Careful for priority inversions here !
1024 * All other uses of attrib spinlock are independent of
1025 * the object spinlock, so we are safe. Jean II */
1026 spin_lock(&obj->attribs->hb_spinlock);
1027
1028 /* List all attributes for this object */
1029 for (attrib = (struct ias_attrib *) hashbin_get_first(obj->attribs);
1030 attrib != NULL;
1031 attrib = (struct ias_attrib *) hashbin_get_next(obj->attribs)) {
1032
1033 IRDA_ASSERT(attrib->magic == IAS_ATTRIB_MAGIC,
1034 goto outloop; );
1035
1036 seq_printf(seq, " - Attribute name: \"%s\", ",
1037 attrib->name);
1038 seq_printf(seq, "value[%s]: ",
1039 ias_value_types[attrib->value->type]);
1040
1041 switch (attrib->value->type) {
1042 case IAS_INTEGER:
1043 seq_printf(seq, "%d\n",
1044 attrib->value->t.integer);
1045 break;
1046 case IAS_STRING:
1047 seq_printf(seq, "\"%s\"\n",
1048 attrib->value->t.string);
1049 break;
1050 case IAS_OCT_SEQ:
1051 seq_printf(seq, "octet sequence (%d bytes)\n",
1052 attrib->value->len);
1053 break;
1054 case IAS_MISSING:
1055 seq_puts(seq, "missing\n");
1056 break;
1057 default:
1058 seq_printf(seq, "type %d?\n",
1059 attrib->value->type);
1060 }
1061 seq_putc(seq, '\n');
1062
1063 }
1064 IRDA_ASSERT_LABEL(outloop:)
1065 spin_unlock(&obj->attribs->hb_spinlock);
1066 }
1067
1068 return 0;
1069 }
1070
1071 static const struct seq_operations irias_seq_ops = {
1072 .start = irias_seq_start,
1073 .next = irias_seq_next,
1074 .stop = irias_seq_stop,
1075 .show = irias_seq_show,
1076 };
1077
1078 static int irias_seq_open(struct inode *inode, struct file *file)
1079 {
1080 IRDA_ASSERT( irias_objects != NULL, return -EINVAL;);
1081
1082 return seq_open(file, &irias_seq_ops);
1083 }
1084
1085 const struct file_operations irias_seq_fops = {
1086 .owner = THIS_MODULE,
1087 .open = irias_seq_open,
1088 .read = seq_read,
1089 .llseek = seq_lseek,
1090 .release = seq_release,
1091 };
1092
1093 #endif /* PROC_FS */
CRIS linux kernel tree