?  search:
summary | log | graphiclog1 | graphiclog2 | commit | commitdiff | tree | refs | edit | fork
blame | history | raw | HEAD
w83627ehf: Fix unchecked return status
[linux-2.6/x86.git] / net / irda / iriap.c
blob61128aa05b4015c9fb85027bd1cc870b34a9beec
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/string.h>
31 #include <linux/init.h>
32 #include <linux/seq_file.h>
33
34 #include <asm/byteorder.h>
35 #include <asm/unaligned.h>
36
37 #include <net/irda/irda.h>
38 #include <net/irda/irttp.h>
39 #include <net/irda/irlmp.h>
40 #include <net/irda/irias_object.h>
41 #include <net/irda/iriap_event.h>
42 #include <net/irda/iriap.h>
43
44 #ifdef CONFIG_IRDA_DEBUG
45 /* FIXME: This one should go in irlmp.c */
46 static const char *ias_charset_types[] = {
47 "CS_ASCII",
48 "CS_ISO_8859_1",
49 "CS_ISO_8859_2",
50 "CS_ISO_8859_3",
51 "CS_ISO_8859_4",
52 "CS_ISO_8859_5",
53 "CS_ISO_8859_6",
54 "CS_ISO_8859_7",
55 "CS_ISO_8859_8",
56 "CS_ISO_8859_9",
57 "CS_UNICODE"
58 };
59 #endif /* CONFIG_IRDA_DEBUG */
60
61 static hashbin_t *iriap = NULL;
62 static void *service_handle;
63
64 static void __iriap_close(struct iriap_cb *self);
65 static int iriap_register_lsap(struct iriap_cb *self, __u8 slsap_sel, int mode);
66 static void iriap_disconnect_indication(void *instance, void *sap,
67 LM_REASON reason, struct sk_buff *skb);
68 static void iriap_connect_indication(void *instance, void *sap,
69 struct qos_info *qos, __u32 max_sdu_size,
70 __u8 max_header_size,
71 struct sk_buff *skb);
72 static void iriap_connect_confirm(void *instance, void *sap,
73 struct qos_info *qos,
74 __u32 max_sdu_size, __u8 max_header_size,
75 struct sk_buff *skb);
76 static int iriap_data_indication(void *instance, void *sap,
77 struct sk_buff *skb);
78
79 static void iriap_watchdog_timer_expired(void *data);
80
81 static inline void iriap_start_watchdog_timer(struct iriap_cb *self,
82 int timeout)
83 {
84 irda_start_timer(&self->watchdog_timer, timeout, self,
85 iriap_watchdog_timer_expired);
86 }
87
88 /*
89 * Function iriap_init (void)
90 *
91 * Initializes the IrIAP layer, called by the module initialization code
92 * in irmod.c
93 */
94 int __init iriap_init(void)
95 {
96 struct ias_object *obj;
97 struct iriap_cb *server;
98 __u8 oct_seq[6];
99 __u16 hints;
100
101 /* Allocate master array */
102 iriap = hashbin_new(HB_LOCK);
103 if (!iriap)
104 return -ENOMEM;
105
106 /* Object repository - defined in irias_object.c */
107 irias_objects = hashbin_new(HB_LOCK);
108 if (!irias_objects) {
109 IRDA_WARNING("%s: Can't allocate irias_objects hashbin!\n",
110 __FUNCTION__);
111 hashbin_delete(iriap, NULL);
112 return -ENOMEM;
113 }
114
115 /*
116 * Register some default services for IrLMP
117 */
118 hints = irlmp_service_to_hint(S_COMPUTER);
119 service_handle = irlmp_register_service(hints);
120
121 /* Register the Device object with LM-IAS */
122 obj = irias_new_object("Device", IAS_DEVICE_ID);
123 irias_add_string_attrib(obj, "DeviceName", "Linux", IAS_KERNEL_ATTR);
124
125 oct_seq[0] = 0x01; /* Version 1 */
126 oct_seq[1] = 0x00; /* IAS support bits */
127 oct_seq[2] = 0x00; /* LM-MUX support bits */
128 #ifdef CONFIG_IRDA_ULTRA
129 oct_seq[2] |= 0x04; /* Connectionless Data support */
130 #endif
131 irias_add_octseq_attrib(obj, "IrLMPSupport", oct_seq, 3,
132 IAS_KERNEL_ATTR);
133 irias_insert_object(obj);
134
135 /*
136 * Register server support with IrLMP so we can accept incoming
137 * connections
138 */
139 server = iriap_open(LSAP_IAS, IAS_SERVER, NULL, NULL);
140 if (!server) {
141 IRDA_DEBUG(0, "%s(), unable to open server\n", __FUNCTION__);
142 return -1;
143 }
144 iriap_register_lsap(server, LSAP_IAS, IAS_SERVER);
145
146 return 0;
147 }
148
149 /*
150 * Function iriap_cleanup (void)
151 *
152 * Initializes the IrIAP layer, called by the module cleanup code in
153 * irmod.c
154 */
155 void __exit iriap_cleanup(void)
156 {
157 irlmp_unregister_service(service_handle);
158
159 hashbin_delete(iriap, (FREE_FUNC) __iriap_close);
160 hashbin_delete(irias_objects, (FREE_FUNC) __irias_delete_object);
161 }
162
163 /*
164 * Function iriap_open (void)
165 *
166 * Opens an instance of the IrIAP layer, and registers with IrLMP
167 */
168 struct iriap_cb *iriap_open(__u8 slsap_sel, int mode, void *priv,
169 CONFIRM_CALLBACK callback)
170 {
171 struct iriap_cb *self;
172
173 IRDA_DEBUG(2, "%s()\n", __FUNCTION__);
174
175 self = kmalloc(sizeof(struct iriap_cb), GFP_ATOMIC);
176 if (!self) {
177 IRDA_WARNING("%s: Unable to kmalloc!\n", __FUNCTION__);
178 return NULL;
179 }
180
181 /*
182 * Initialize instance
183 */
184 memset(self, 0, sizeof(struct iriap_cb));
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(&notify);
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, &notify, 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(64, GFP_ATOMIC);
349 if (tx_skb == NULL) {
350 IRDA_DEBUG(0, "%s(), Could not allocate an sk_buff of length %d\n",
351 __FUNCTION__, 64);
352 return;
353 }
354
355 /*
356 * Reserve space for MUX control and LAP header
357 */
358 skb_reserve(tx_skb, LMP_MAX_HEADER);
359
360 irlmp_disconnect_request(self->lsap, tx_skb);
361 }
362
363 /*
364 * Function iriap_getvaluebyclass (addr, name, attr)
365 *
366 * Retrieve all values from attribute in all objects with given class
367 * name
368 */
369 int iriap_getvaluebyclass_request(struct iriap_cb *self,
370 __u32 saddr, __u32 daddr,
371 char *name, char *attr)
372 {
373 struct sk_buff *tx_skb;
374 int name_len, attr_len, skb_len;
375 __u8 *frame;
376
377 IRDA_ASSERT(self != NULL, return -1;);
378 IRDA_ASSERT(self->magic == IAS_MAGIC, return -1;);
379
380 /* Client must supply the destination device address */
381 if (!daddr)
382 return -1;
383
384 self->daddr = daddr;
385 self->saddr = saddr;
386
387 /*
388 * Save operation, so we know what the later indication is about
389 */
390 self->operation = GET_VALUE_BY_CLASS;
391
392 /* Give ourselves 10 secs to finish this operation */
393 iriap_start_watchdog_timer(self, 10*HZ);
394
395 name_len = strlen(name); /* Up to IAS_MAX_CLASSNAME = 60 */
396 attr_len = strlen(attr); /* Up to IAS_MAX_ATTRIBNAME = 60 */
397
398 skb_len = self->max_header_size+2+name_len+1+attr_len+4;
399 tx_skb = alloc_skb(skb_len, GFP_ATOMIC);
400 if (!tx_skb)
401 return -ENOMEM;
402
403 /* Reserve space for MUX and LAP header */
404 skb_reserve(tx_skb, self->max_header_size);
405 skb_put(tx_skb, 3+name_len+attr_len);
406 frame = tx_skb->data;
407
408 /* Build frame */
409 frame[0] = IAP_LST | GET_VALUE_BY_CLASS;
410 frame[1] = name_len; /* Insert length of name */
411 memcpy(frame+2, name, name_len); /* Insert name */
412 frame[2+name_len] = attr_len; /* Insert length of attr */
413 memcpy(frame+3+name_len, attr, attr_len); /* Insert attr */
414
415 iriap_do_client_event(self, IAP_CALL_REQUEST_GVBC, tx_skb);
416
417 /* Drop reference count - see state_s_disconnect(). */
418 dev_kfree_skb(tx_skb);
419
420 return 0;
421 }
422 EXPORT_SYMBOL(iriap_getvaluebyclass_request);
423
424 /*
425 * Function iriap_getvaluebyclass_confirm (self, skb)
426 *
427 * Got result from GetValueByClass command. Parse it and return result
428 * to service user.
429 *
430 */
431 static void iriap_getvaluebyclass_confirm(struct iriap_cb *self,
432 struct sk_buff *skb)
433 {
434 struct ias_value *value;
435 int charset;
436 __u32 value_len;
437 __u32 tmp_cpu32;
438 __u16 obj_id;
439 __u16 len;
440 __u8 type;
441 __u8 *fp;
442 int n;
443
444 IRDA_ASSERT(self != NULL, return;);
445 IRDA_ASSERT(self->magic == IAS_MAGIC, return;);
446 IRDA_ASSERT(skb != NULL, return;);
447
448 /* Initialize variables */
449 fp = skb->data;
450 n = 2;
451
452 /* Get length, MSB first */
453 len = be16_to_cpu(get_unaligned((__u16 *)(fp+n))); n += 2;
454
455 IRDA_DEBUG(4, "%s(), len=%d\n", __FUNCTION__, len);
456
457 /* Get object ID, MSB first */
458 obj_id = be16_to_cpu(get_unaligned((__u16 *)(fp+n))); n += 2;
459
460 type = fp[n++];
461 IRDA_DEBUG(4, "%s(), Value type = %d\n", __FUNCTION__, type);
462
463 switch (type) {
464 case IAS_INTEGER:
465 memcpy(&tmp_cpu32, fp+n, 4); n += 4;
466 be32_to_cpus(&tmp_cpu32);
467 value = irias_new_integer_value(tmp_cpu32);
468
469 /* Legal values restricted to 0x01-0x6f, page 15 irttp */
470 IRDA_DEBUG(4, "%s(), lsap=%d\n", __FUNCTION__, value->t.integer);
471 break;
472 case IAS_STRING:
473 charset = fp[n++];
474
475 switch (charset) {
476 case CS_ASCII:
477 break;
478 /* case CS_ISO_8859_1: */
479 /* case CS_ISO_8859_2: */
480 /* case CS_ISO_8859_3: */
481 /* case CS_ISO_8859_4: */
482 /* case CS_ISO_8859_5: */
483 /* case CS_ISO_8859_6: */
484 /* case CS_ISO_8859_7: */
485 /* case CS_ISO_8859_8: */
486 /* case CS_ISO_8859_9: */
487 /* case CS_UNICODE: */
488 default:
489 IRDA_DEBUG(0, "%s(), charset %s, not supported\n",
490 __FUNCTION__, ias_charset_types[charset]);
491
492 /* Aborting, close connection! */
493 iriap_disconnect_request(self);
494 return;
495 /* break; */
496 }
497 value_len = fp[n++];
498 IRDA_DEBUG(4, "%s(), strlen=%d\n", __FUNCTION__, value_len);
499
500 /* Make sure the string is null-terminated */
501 fp[n+value_len] = 0x00;
502 IRDA_DEBUG(4, "Got string %s\n", fp+n);
503
504 /* Will truncate to IAS_MAX_STRING bytes */
505 value = irias_new_string_value(fp+n);
506 break;
507 case IAS_OCT_SEQ:
508 value_len = be16_to_cpu(get_unaligned((__u16 *)(fp+n)));
509 n += 2;
510
511 /* Will truncate to IAS_MAX_OCTET_STRING bytes */
512 value = irias_new_octseq_value(fp+n, value_len);
513 break;
514 default:
515 value = irias_new_missing_value();
516 break;
517 }
518
519 /* Finished, close connection! */
520 iriap_disconnect_request(self);
521
522 /* Warning, the client might close us, so remember no to use self
523 * anymore after calling confirm
524 */
525 if (self->confirm)
526 self->confirm(IAS_SUCCESS, obj_id, value, self->priv);
527 else {
528 IRDA_DEBUG(0, "%s(), missing handler!\n", __FUNCTION__);
529 irias_delete_value(value);
530 }
531 }
532
533 /*
534 * Function iriap_getvaluebyclass_response ()
535 *
536 * Send answer back to remote LM-IAS
537 *
538 */
539 static void iriap_getvaluebyclass_response(struct iriap_cb *self,
540 __u16 obj_id,
541 __u8 ret_code,
542 struct ias_value *value)
543 {
544 struct sk_buff *tx_skb;
545 int n;
546 __u32 tmp_be32;
547 __be16 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 = alloc_skb(value->len + self->max_header_size + 32,
566 GFP_ATOMIC);
567 if (!tx_skb)
568 return;
569
570 /* Reserve space for MUX and LAP header */
571 skb_reserve(tx_skb, self->max_header_size);
572 skb_put(tx_skb, 6);
573
574 fp = tx_skb->data;
575
576 /* Build frame */
577 fp[n++] = GET_VALUE_BY_CLASS | IAP_LST;
578 fp[n++] = ret_code;
579
580 /* Insert list length (MSB first) */
581 tmp_be16 = __constant_htons(0x0001);
582 memcpy(fp+n, &tmp_be16, 2); n += 2;
583
584 /* Insert object identifier ( MSB first) */
585 tmp_be16 = cpu_to_be16(obj_id);
586 memcpy(fp+n, &tmp_be16, 2); n += 2;
587
588 switch (value->type) {
589 case IAS_STRING:
590 skb_put(tx_skb, 3 + value->len);
591 fp[n++] = value->type;
592 fp[n++] = 0; /* ASCII */
593 fp[n++] = (__u8) value->len;
594 memcpy(fp+n, value->t.string, value->len); n+=value->len;
595 break;
596 case IAS_INTEGER:
597 skb_put(tx_skb, 5);
598 fp[n++] = value->type;
599
600 tmp_be32 = cpu_to_be32(value->t.integer);
601 memcpy(fp+n, &tmp_be32, 4); n += 4;
602 break;
603 case IAS_OCT_SEQ:
604 skb_put(tx_skb, 3 + value->len);
605 fp[n++] = value->type;
606
607 tmp_be16 = cpu_to_be16(value->len);
608 memcpy(fp+n, &tmp_be16, 2); n += 2;
609 memcpy(fp+n, value->t.oct_seq, value->len); n+=value->len;
610 break;
611 case IAS_MISSING:
612 IRDA_DEBUG( 3, "%s: sending IAS_MISSING\n", __FUNCTION__);
613 skb_put(tx_skb, 1);
614 fp[n++] = value->type;
615 break;
616 default:
617 IRDA_DEBUG(0, "%s(), type not implemented!\n", __FUNCTION__);
618 break;
619 }
620 iriap_do_r_connect_event(self, IAP_CALL_RESPONSE, tx_skb);
621
622 /* Drop reference count - see state_r_execute(). */
623 dev_kfree_skb(tx_skb);
624 }
625
626 /*
627 * Function iriap_getvaluebyclass_indication (self, skb)
628 *
629 * getvaluebyclass is requested from peer LM-IAS
630 *
631 */
632 static void iriap_getvaluebyclass_indication(struct iriap_cb *self,
633 struct sk_buff *skb)
634 {
635 struct ias_object *obj;
636 struct ias_attrib *attrib;
637 int name_len;
638 int attr_len;
639 char name[IAS_MAX_CLASSNAME + 1]; /* 60 bytes */
640 char attr[IAS_MAX_ATTRIBNAME + 1]; /* 60 bytes */
641 __u8 *fp;
642 int n;
643
644 IRDA_DEBUG(4, "%s()\n", __FUNCTION__);
645
646 IRDA_ASSERT(self != NULL, return;);
647 IRDA_ASSERT(self->magic == IAS_MAGIC, return;);
648 IRDA_ASSERT(skb != NULL, return;);
649
650 fp = skb->data;
651 n = 1;
652
653 name_len = fp[n++];
654 memcpy(name, fp+n, name_len); n+=name_len;
655 name[name_len] = '\0';
656
657 attr_len = fp[n++];
658 memcpy(attr, fp+n, attr_len); n+=attr_len;
659 attr[attr_len] = '\0';
660
661 IRDA_DEBUG(4, "LM-IAS: Looking up %s: %s\n", name, attr);
662 obj = irias_find_object(name);
663
664 if (obj == NULL) {
665 IRDA_DEBUG(2, "LM-IAS: Object %s not found\n", name);
666 iriap_getvaluebyclass_response(self, 0x1235, IAS_CLASS_UNKNOWN,
667 &irias_missing);
668 return;
669 }
670 IRDA_DEBUG(4, "LM-IAS: found %s, id=%d\n", obj->name, obj->id);
671
672 attrib = irias_find_attrib(obj, attr);
673 if (attrib == NULL) {
674 IRDA_DEBUG(2, "LM-IAS: Attribute %s not found\n", attr);
675 iriap_getvaluebyclass_response(self, obj->id,
676 IAS_ATTRIB_UNKNOWN,
677 &irias_missing);
678 return;
679 }
680
681 /* We have a match; send the value. */
682 iriap_getvaluebyclass_response(self, obj->id, IAS_SUCCESS,
683 attrib->value);
684
685 return;
686 }
687
688 /*
689 * Function iriap_send_ack (void)
690 *
691 * Currently not used
692 *
693 */
694 void iriap_send_ack(struct iriap_cb *self)
695 {
696 struct sk_buff *tx_skb;
697 __u8 *frame;
698
699 IRDA_DEBUG(2, "%s()\n", __FUNCTION__);
700
701 IRDA_ASSERT(self != NULL, return;);
702 IRDA_ASSERT(self->magic == IAS_MAGIC, return;);
703
704 tx_skb = alloc_skb(64, GFP_ATOMIC);
705 if (!tx_skb)
706 return;
707
708 /* Reserve space for MUX and LAP header */
709 skb_reserve(tx_skb, self->max_header_size);
710 skb_put(tx_skb, 1);
711 frame = tx_skb->data;
712
713 /* Build frame */
714 frame[0] = IAP_LST | IAP_ACK | self->operation;
715
716 irlmp_data_request(self->lsap, tx_skb);
717 }
718
719 void iriap_connect_request(struct iriap_cb *self)
720 {
721 int ret;
722
723 IRDA_ASSERT(self != NULL, return;);
724 IRDA_ASSERT(self->magic == IAS_MAGIC, return;);
725
726 ret = irlmp_connect_request(self->lsap, LSAP_IAS,
727 self->saddr, self->daddr,
728 NULL, NULL);
729 if (ret < 0) {
730 IRDA_DEBUG(0, "%s(), connect failed!\n", __FUNCTION__);
731 self->confirm(IAS_DISCONNECT, 0, NULL, self->priv);
732 }
733 }
734
735 /*
736 * Function iriap_connect_confirm (handle, skb)
737 *
738 * LSAP connection confirmed!
739 *
740 */
741 static void iriap_connect_confirm(void *instance, void *sap,
742 struct qos_info *qos, __u32 max_seg_size,
743 __u8 max_header_size,
744 struct sk_buff *skb)
745 {
746 struct iriap_cb *self;
747
748 self = (struct iriap_cb *) instance;
749
750 IRDA_ASSERT(self != NULL, return;);
751 IRDA_ASSERT(self->magic == IAS_MAGIC, return;);
752 IRDA_ASSERT(skb != NULL, return;);
753
754 self->max_data_size = max_seg_size;
755 self->max_header_size = max_header_size;
756
757 del_timer(&self->watchdog_timer);
758
759 iriap_do_client_event(self, IAP_LM_CONNECT_CONFIRM, skb);
760
761 /* Drop reference count - see state_s_make_call(). */
762 dev_kfree_skb(skb);
763 }
764
765 /*
766 * Function iriap_connect_indication ( handle, skb)
767 *
768 * Remote LM-IAS is requesting connection
769 *
770 */
771 static void iriap_connect_indication(void *instance, void *sap,
772 struct qos_info *qos, __u32 max_seg_size,
773 __u8 max_header_size,
774 struct sk_buff *skb)
775 {
776 struct iriap_cb *self, *new;
777
778 IRDA_DEBUG(1, "%s()\n", __FUNCTION__);
779
780 self = (struct iriap_cb *) instance;
781
782 IRDA_ASSERT(skb != NULL, return;);
783 IRDA_ASSERT(self != NULL, goto out;);
784 IRDA_ASSERT(self->magic == IAS_MAGIC, goto out;);
785
786 /* Start new server */
787 new = iriap_open(LSAP_IAS, IAS_SERVER, NULL, NULL);
788 if (!new) {
789 IRDA_DEBUG(0, "%s(), open failed\n", __FUNCTION__);
790 goto out;
791 }
792
793 /* Now attach up the new "socket" */
794 new->lsap = irlmp_dup(self->lsap, new);
795 if (!new->lsap) {
796 IRDA_DEBUG(0, "%s(), dup failed!\n", __FUNCTION__);
797 goto out;
798 }
799
800 new->max_data_size = max_seg_size;
801 new->max_header_size = max_header_size;
802
803 /* Clean up the original one to keep it in listen state */
804 irlmp_listen(self->lsap);
805
806 iriap_do_server_event(new, IAP_LM_CONNECT_INDICATION, skb);
807
808 out:
809 /* Drop reference count - see state_r_disconnect(). */
810 dev_kfree_skb(skb);
811 }
812
813 /*
814 * Function iriap_data_indication (handle, skb)
815 *
816 * Receives data from connection identified by handle from IrLMP
817 *
818 */
819 static int iriap_data_indication(void *instance, void *sap,
820 struct sk_buff *skb)
821 {
822 struct iriap_cb *self;
823 __u8 *frame;
824 __u8 opcode;
825
826 IRDA_DEBUG(3, "%s()\n", __FUNCTION__);
827
828 self = (struct iriap_cb *) instance;
829
830 IRDA_ASSERT(skb != NULL, return 0;);
831 IRDA_ASSERT(self != NULL, goto out;);
832 IRDA_ASSERT(self->magic == IAS_MAGIC, goto out;);
833
834 frame = skb->data;
835
836 if (self->mode == IAS_SERVER) {
837 /* Call server */
838 IRDA_DEBUG(4, "%s(), Calling server!\n", __FUNCTION__);
839 iriap_do_r_connect_event(self, IAP_RECV_F_LST, skb);
840 goto out;
841 }
842 opcode = frame[0];
843 if (~opcode & IAP_LST) {
844 IRDA_WARNING("%s:, IrIAS multiframe commands or "
845 "results is not implemented yet!\n",
846 __FUNCTION__);
847 goto out;
848 }
849
850 /* Check for ack frames since they don't contain any data */
851 if (opcode & IAP_ACK) {
852 IRDA_DEBUG(0, "%s() Got ack frame!\n", __FUNCTION__);
853 goto out;
854 }
855
856 opcode &= ~IAP_LST; /* Mask away LST bit */
857
858 switch (opcode) {
859 case GET_INFO_BASE:
860 IRDA_DEBUG(0, "IrLMP GetInfoBaseDetails not implemented!\n");
861 break;
862 case GET_VALUE_BY_CLASS:
863 iriap_do_call_event(self, IAP_RECV_F_LST, NULL);
864
865 switch (frame[1]) {
866 case IAS_SUCCESS:
867 iriap_getvaluebyclass_confirm(self, skb);
868 break;
869 case IAS_CLASS_UNKNOWN:
870 IRDA_DEBUG(1, "%s(), No such class!\n", __FUNCTION__);
871 /* Finished, close connection! */
872 iriap_disconnect_request(self);
873
874 /*
875 * Warning, the client might close us, so remember
876 * no to use self anymore after calling confirm
877 */
878 if (self->confirm)
879 self->confirm(IAS_CLASS_UNKNOWN, 0, NULL,
880 self->priv);
881 break;
882 case IAS_ATTRIB_UNKNOWN:
883 IRDA_DEBUG(1, "%s(), No such attribute!\n", __FUNCTION__);
884 /* Finished, close connection! */
885 iriap_disconnect_request(self);
886
887 /*
888 * Warning, the client might close us, so remember
889 * no to use self anymore after calling confirm
890 */
891 if (self->confirm)
892 self->confirm(IAS_ATTRIB_UNKNOWN, 0, NULL,
893 self->priv);
894 break;
895 }
896 break;
897 default:
898 IRDA_DEBUG(0, "%s(), Unknown op-code: %02x\n", __FUNCTION__,
899 opcode);
900 break;
901 }
902
903 out:
904 /* Cleanup - sub-calls will have done skb_get() as needed. */
905 dev_kfree_skb(skb);
906 return 0;
907 }
908
909 /*
910 * Function iriap_call_indication (self, skb)
911 *
912 * Received call to server from peer LM-IAS
913 *
914 */
915 void iriap_call_indication(struct iriap_cb *self, struct sk_buff *skb)
916 {
917 __u8 *fp;
918 __u8 opcode;
919
920 IRDA_DEBUG(4, "%s()\n", __FUNCTION__);
921
922 IRDA_ASSERT(self != NULL, return;);
923 IRDA_ASSERT(self->magic == IAS_MAGIC, return;);
924 IRDA_ASSERT(skb != NULL, return;);
925
926 fp = skb->data;
927
928 opcode = fp[0];
929 if (~opcode & 0x80) {
930 IRDA_WARNING("%s: IrIAS multiframe commands or results"
931 "is not implemented yet!\n", __FUNCTION__);
932 return;
933 }
934 opcode &= 0x7f; /* Mask away LST bit */
935
936 switch (opcode) {
937 case GET_INFO_BASE:
938 IRDA_WARNING("%s: GetInfoBaseDetails not implemented yet!\n",
939 __FUNCTION__);
940 break;
941 case GET_VALUE_BY_CLASS:
942 iriap_getvaluebyclass_indication(self, skb);
943 break;
944 }
945 /* skb will be cleaned up in iriap_data_indication */
946 }
947
948 /*
949 * Function iriap_watchdog_timer_expired (data)
950 *
951 * Query has taken too long time, so abort
952 *
953 */
954 static void iriap_watchdog_timer_expired(void *data)
955 {
956 struct iriap_cb *self = (struct iriap_cb *) data;
957
958 IRDA_ASSERT(self != NULL, return;);
959 IRDA_ASSERT(self->magic == IAS_MAGIC, return;);
960
961 /* iriap_close(self); */
962 }
963
964 #ifdef CONFIG_PROC_FS
965
966 static const char *ias_value_types[] = {
967 "IAS_MISSING",
968 "IAS_INTEGER",
969 "IAS_OCT_SEQ",
970 "IAS_STRING"
971 };
972
973 static inline struct ias_object *irias_seq_idx(loff_t pos)
974 {
975 struct ias_object *obj;
976
977 for (obj = (struct ias_object *) hashbin_get_first(irias_objects);
978 obj; obj = (struct ias_object *) hashbin_get_next(irias_objects)) {
979 if (pos-- == 0)
980 break;
981 }
982
983 return obj;
984 }
985
986 static void *irias_seq_start(struct seq_file *seq, loff_t *pos)
987 {
988 spin_lock_irq(&irias_objects->hb_spinlock);
989
990 return *pos ? irias_seq_idx(*pos - 1) : SEQ_START_TOKEN;
991 }
992
993 static void *irias_seq_next(struct seq_file *seq, void *v, loff_t *pos)
994 {
995 ++*pos;
996
997 return (v == SEQ_START_TOKEN)
998 ? (void *) hashbin_get_first(irias_objects)
999 : (void *) hashbin_get_next(irias_objects);
1000 }
1001
1002 static void irias_seq_stop(struct seq_file *seq, void *v)
1003 {
1004 spin_unlock_irq(&irias_objects->hb_spinlock);
1005 }
1006
1007 static int irias_seq_show(struct seq_file *seq, void *v)
1008 {
1009 if (v == SEQ_START_TOKEN)
1010 seq_puts(seq, "LM-IAS Objects:\n");
1011 else {
1012 struct ias_object *obj = v;
1013 struct ias_attrib *attrib;
1014
1015 IRDA_ASSERT(obj->magic == IAS_OBJECT_MAGIC, return -EINVAL;);
1016
1017 seq_printf(seq, "name: %s, id=%d\n",
1018 obj->name, obj->id);
1019
1020 /* Careful for priority inversions here !
1021 * All other uses of attrib spinlock are independent of
1022 * the object spinlock, so we are safe. Jean II */
1023 spin_lock(&obj->attribs->hb_spinlock);
1024
1025 /* List all attributes for this object */
1026 for (attrib = (struct ias_attrib *) hashbin_get_first(obj->attribs);
1027 attrib != NULL;
1028 attrib = (struct ias_attrib *) hashbin_get_next(obj->attribs)) {
1029
1030 IRDA_ASSERT(attrib->magic == IAS_ATTRIB_MAGIC,
1031 goto outloop; );
1032
1033 seq_printf(seq, " - Attribute name: \"%s\", ",
1034 attrib->name);
1035 seq_printf(seq, "value[%s]: ",
1036 ias_value_types[attrib->value->type]);
1037
1038 switch (attrib->value->type) {
1039 case IAS_INTEGER:
1040 seq_printf(seq, "%d\n",
1041 attrib->value->t.integer);
1042 break;
1043 case IAS_STRING:
1044 seq_printf(seq, "\"%s\"\n",
1045 attrib->value->t.string);
1046 break;
1047 case IAS_OCT_SEQ:
1048 seq_printf(seq, "octet sequence (%d bytes)\n",
1049 attrib->value->len);
1050 break;
1051 case IAS_MISSING:
1052 seq_puts(seq, "missing\n");
1053 break;
1054 default:
1055 seq_printf(seq, "type %d?\n",
1056 attrib->value->type);
1057 }
1058 seq_putc(seq, '\n');
1059
1060 }
1061 IRDA_ASSERT_LABEL(outloop:)
1062 spin_unlock(&obj->attribs->hb_spinlock);
1063 }
1064
1065 return 0;
1066 }
1067
1068 static struct seq_operations irias_seq_ops = {
1069 .start = irias_seq_start,
1070 .next = irias_seq_next,
1071 .stop = irias_seq_stop,
1072 .show = irias_seq_show,
1073 };
1074
1075 static int irias_seq_open(struct inode *inode, struct file *file)
1076 {
1077 IRDA_ASSERT( irias_objects != NULL, return -EINVAL;);
1078
1079 return seq_open(file, &irias_seq_ops);
1080 }
1081
1082 struct file_operations irias_seq_fops = {
1083 .owner = THIS_MODULE,
1084 .open = irias_seq_open,
1085 .read = seq_read,
1086 .llseek = seq_lseek,
1087 .release = seq_release,
1088 };
1089
1090 #endif /* PROC_FS */
x86 "subsystem" repository