1 /*********************************************************************
2 *
3 * Filename: iriap.c
4 * Version: 0.8
5 * Description: Information Access Protocol (IAP)
6 * Status: Experimental.
7 * Author: Dag Brattli <dagb@cs.uit.no>
8 * Created at: Thu Aug 21 00:02:07 1997
9 * Modified at: Sat Dec 25 16:42:42 1999
10 * Modified by: Dag Brattli <dagb@cs.uit.no>
11 *
12 * Copyright (c) 1998-1999 Dag Brattli <dagb@cs.uit.no>,
13 * All Rights Reserved.
14 * Copyright (c) 2000-2003 Jean Tourrilhes <jt@hpl.hp.com>
15 *
16 * This program is free software; you can redistribute it and/or
17 * modify it under the terms of the GNU General Public License as
18 * published by the Free Software Foundation; either version 2 of
19 * the License, or (at your option) any later version.
20 *
21 * Neither Dag Brattli nor University of Tromsø admit liability nor
22 * provide warranty for any of this software. This material is
23 * provided "AS-IS" and at no charge.
24 *
25 ********************************************************************/
26
27 #include <linux/module.h>
28 #include <linux/types.h>
29 #include <linux/skbuff.h>
30 #include <linux/fs.h>
31 #include <linux/string.h>
32 #include <linux/init.h>
33 #include <linux/seq_file.h>
34
35 #include <asm/byteorder.h>
36 #include <asm/unaligned.h>
37
38 #include <net/irda/irda.h>
39 #include <net/irda/irttp.h>
40 #include <net/irda/irlmp.h>
41 #include <net/irda/irias_object.h>
42 #include <net/irda/iriap_event.h>
43 #include <net/irda/iriap.h>
44
45 #ifdef CONFIG_IRDA_DEBUG
46 /* FIXME: This one should go in irlmp.c */
47 static const char *ias_charset_types[] = {
48 "CS_ASCII",
49 "CS_ISO_8859_1",
50 "CS_ISO_8859_2",
51 "CS_ISO_8859_3",
52 "CS_ISO_8859_4",
53 "CS_ISO_8859_5",
54 "CS_ISO_8859_6",
55 "CS_ISO_8859_7",
56 "CS_ISO_8859_8",
57 "CS_ISO_8859_9",
58 "CS_UNICODE"
59 };
60 #endif /* CONFIG_IRDA_DEBUG */
61
62 static hashbin_t *iriap = NULL;
63 static void *service_handle;
64
65 static void __iriap_close(struct iriap_cb *self);
66 static int iriap_register_lsap(struct iriap_cb *self, __u8 slsap_sel, int mode);
67 static void iriap_disconnect_indication(void *instance, void *sap,
68 LM_REASON reason, struct sk_buff *skb);
69 static void iriap_connect_indication(void *instance, void *sap,
70 struct qos_info *qos, __u32 max_sdu_size,
71 __u8 max_header_size,
72 struct sk_buff *skb);
73 static void iriap_connect_confirm(void *instance, void *sap,
74 struct qos_info *qos,
75 __u32 max_sdu_size, __u8 max_header_size,
76 struct sk_buff *skb);
77 static int iriap_data_indication(void *instance, void *sap,
78 struct sk_buff *skb);
79
80 static void iriap_watchdog_timer_expired(void *data);
81
iriap_start_watchdog_timer(struct iriap_cb * self,int timeout)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 */
iriap_init(void)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 __func__);
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", __func__);
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 */
iriap_cleanup(void)156 void iriap_cleanup(void)
157 {
158 irlmp_unregister_service(service_handle);
159
160 hashbin_delete(iriap, (FREE_FUNC) __iriap_close);
161 hashbin_delete(irias_objects, (FREE_FUNC) __irias_delete_object);
162 }
163
164 /*
165 * Function iriap_open (void)
166 *
167 * Opens an instance of the IrIAP layer, and registers with IrLMP
168 */
iriap_open(__u8 slsap_sel,int mode,void * priv,CONFIRM_CALLBACK callback)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", __func__);
175
176 self = kzalloc(sizeof(*self), GFP_ATOMIC);
177 if (!self) {
178 IRDA_WARNING("%s: Unable to kmalloc!\n", __func__);
179 return NULL;
180 }
181
182 /*
183 * Initialize instance
184 */
185
186 self->magic = IAS_MAGIC;
187 self->mode = mode;
188 if (mode == IAS_CLIENT)
189 iriap_register_lsap(self, slsap_sel, mode);
190
191 self->confirm = callback;
192 self->priv = priv;
193
194 /* iriap_getvaluebyclass_request() will construct packets before
195 * we connect, so this must have a sane value... Jean II */
196 self->max_header_size = LMP_MAX_HEADER;
197
198 init_timer(&self->watchdog_timer);
199
200 hashbin_insert(iriap, (irda_queue_t *) self, (long) self, NULL);
201
202 /* Initialize state machines */
203 iriap_next_client_state(self, S_DISCONNECT);
204 iriap_next_call_state(self, S_MAKE_CALL);
205 iriap_next_server_state(self, R_DISCONNECT);
206 iriap_next_r_connect_state(self, R_WAITING);
207
208 return self;
209 }
210 EXPORT_SYMBOL(iriap_open);
211
212 /*
213 * Function __iriap_close (self)
214 *
215 * Removes (deallocates) the IrIAP instance
216 *
217 */
__iriap_close(struct iriap_cb * self)218 static void __iriap_close(struct iriap_cb *self)
219 {
220 IRDA_DEBUG(4, "%s()\n", __func__);
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 */
iriap_close(struct iriap_cb * self)240 void iriap_close(struct iriap_cb *self)
241 {
242 struct iriap_cb *entry;
243
244 IRDA_DEBUG(2, "%s()\n", __func__);
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
iriap_register_lsap(struct iriap_cb * self,__u8 slsap_sel,int mode)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", __func__);
266
267 irda_notify_init(¬ify);
268 notify.connect_confirm = iriap_connect_confirm;
269 notify.connect_indication = iriap_connect_indication;
270 notify.disconnect_indication = iriap_disconnect_indication;
271 notify.data_indication = iriap_data_indication;
272 notify.instance = self;
273 if (mode == IAS_CLIENT)
274 strcpy(notify.name, "IrIAS cli");
275 else
276 strcpy(notify.name, "IrIAS srv");
277
278 self->lsap = irlmp_open_lsap(slsap_sel, ¬ify, 0);
279 if (self->lsap == NULL) {
280 IRDA_ERROR("%s: Unable to allocated LSAP!\n", __func__);
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 */
iriap_disconnect_indication(void * instance,void * sap,LM_REASON reason,struct sk_buff * skb)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", __func__, 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", __func__);
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", __func__);
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 */
iriap_disconnect_request(struct iriap_cb * self)339 static void iriap_disconnect_request(struct iriap_cb *self)
340 {
341 struct sk_buff *tx_skb;
342
343 IRDA_DEBUG(4, "%s()\n", __func__);
344
345 IRDA_ASSERT(self != NULL, return;);
346 IRDA_ASSERT(self->magic == IAS_MAGIC, return;);
347
348 tx_skb = alloc_skb(LMP_MAX_HEADER, GFP_ATOMIC);
349 if (tx_skb == NULL) {
350 IRDA_DEBUG(0,
351 "%s(), Could not allocate an sk_buff of length %d\n",
352 __func__, LMP_MAX_HEADER);
353 return;
354 }
355
356 /*
357 * Reserve space for MUX control and LAP header
358 */
359 skb_reserve(tx_skb, LMP_MAX_HEADER);
360
361 irlmp_disconnect_request(self->lsap, tx_skb);
362 }
363
364 /*
365 * Function iriap_getvaluebyclass (addr, name, attr)
366 *
367 * Retrieve all values from attribute in all objects with given class
368 * name
369 */
iriap_getvaluebyclass_request(struct iriap_cb * self,__u32 saddr,__u32 daddr,char * name,char * attr)370 int iriap_getvaluebyclass_request(struct iriap_cb *self,
371 __u32 saddr, __u32 daddr,
372 char *name, char *attr)
373 {
374 struct sk_buff *tx_skb;
375 int name_len, attr_len, skb_len;
376 __u8 *frame;
377
378 IRDA_ASSERT(self != NULL, return -1;);
379 IRDA_ASSERT(self->magic == IAS_MAGIC, return -1;);
380
381 /* Client must supply the destination device address */
382 if (!daddr)
383 return -1;
384
385 self->daddr = daddr;
386 self->saddr = saddr;
387
388 /*
389 * Save operation, so we know what the later indication is about
390 */
391 self->operation = GET_VALUE_BY_CLASS;
392
393 /* Give ourselves 10 secs to finish this operation */
394 iriap_start_watchdog_timer(self, 10*HZ);
395
396 name_len = strlen(name); /* Up to IAS_MAX_CLASSNAME = 60 */
397 attr_len = strlen(attr); /* Up to IAS_MAX_ATTRIBNAME = 60 */
398
399 skb_len = self->max_header_size+2+name_len+1+attr_len+4;
400 tx_skb = alloc_skb(skb_len, GFP_ATOMIC);
401 if (!tx_skb)
402 return -ENOMEM;
403
404 /* Reserve space for MUX and LAP header */
405 skb_reserve(tx_skb, self->max_header_size);
406 skb_put(tx_skb, 3+name_len+attr_len);
407 frame = tx_skb->data;
408
409 /* Build frame */
410 frame[0] = IAP_LST | GET_VALUE_BY_CLASS;
411 frame[1] = name_len; /* Insert length of name */
412 memcpy(frame+2, name, name_len); /* Insert name */
413 frame[2+name_len] = attr_len; /* Insert length of attr */
414 memcpy(frame+3+name_len, attr, attr_len); /* Insert attr */
415
416 iriap_do_client_event(self, IAP_CALL_REQUEST_GVBC, tx_skb);
417
418 /* Drop reference count - see state_s_disconnect(). */
419 dev_kfree_skb(tx_skb);
420
421 return 0;
422 }
423 EXPORT_SYMBOL(iriap_getvaluebyclass_request);
424
425 /*
426 * Function iriap_getvaluebyclass_confirm (self, skb)
427 *
428 * Got result from GetValueByClass command. Parse it and return result
429 * to service user.
430 *
431 */
iriap_getvaluebyclass_confirm(struct iriap_cb * self,struct sk_buff * skb)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 = get_unaligned_be16(fp + n);
455 n += 2;
456
457 IRDA_DEBUG(4, "%s(), len=%d\n", __func__, len);
458
459 /* Get object ID, MSB first */
460 obj_id = get_unaligned_be16(fp + n);
461 n += 2;
462
463 type = fp[n++];
464 IRDA_DEBUG(4, "%s(), Value type = %d\n", __func__, type);
465
466 switch (type) {
467 case IAS_INTEGER:
468 memcpy(&tmp_cpu32, fp+n, 4); n += 4;
469 be32_to_cpus(&tmp_cpu32);
470 value = irias_new_integer_value(tmp_cpu32);
471
472 /* Legal values restricted to 0x01-0x6f, page 15 irttp */
473 IRDA_DEBUG(4, "%s(), lsap=%d\n", __func__, value->t.integer);
474 break;
475 case IAS_STRING:
476 charset = fp[n++];
477
478 switch (charset) {
479 case CS_ASCII:
480 break;
481 /* case CS_ISO_8859_1: */
482 /* case CS_ISO_8859_2: */
483 /* case CS_ISO_8859_3: */
484 /* case CS_ISO_8859_4: */
485 /* case CS_ISO_8859_5: */
486 /* case CS_ISO_8859_6: */
487 /* case CS_ISO_8859_7: */
488 /* case CS_ISO_8859_8: */
489 /* case CS_ISO_8859_9: */
490 /* case CS_UNICODE: */
491 default:
492 IRDA_DEBUG(0, "%s(), charset %s, not supported\n",
493 __func__, ias_charset_types[charset]);
494
495 /* Aborting, close connection! */
496 iriap_disconnect_request(self);
497 return;
498 /* break; */
499 }
500 value_len = fp[n++];
501 IRDA_DEBUG(4, "%s(), strlen=%d\n", __func__, value_len);
502
503 /* Make sure the string is null-terminated */
504 fp[n+value_len] = 0x00;
505 IRDA_DEBUG(4, "Got string %s\n", fp+n);
506
507 /* Will truncate to IAS_MAX_STRING bytes */
508 value = irias_new_string_value(fp+n);
509 break;
510 case IAS_OCT_SEQ:
511 value_len = get_unaligned_be16(fp + n);
512 n += 2;
513
514 /* Will truncate to IAS_MAX_OCTET_STRING bytes */
515 value = irias_new_octseq_value(fp+n, value_len);
516 break;
517 default:
518 value = irias_new_missing_value();
519 break;
520 }
521
522 /* Finished, close connection! */
523 iriap_disconnect_request(self);
524
525 /* Warning, the client might close us, so remember no to use self
526 * anymore after calling confirm
527 */
528 if (self->confirm)
529 self->confirm(IAS_SUCCESS, obj_id, value, self->priv);
530 else {
531 IRDA_DEBUG(0, "%s(), missing handler!\n", __func__);
532 irias_delete_value(value);
533 }
534 }
535
536 /*
537 * Function iriap_getvaluebyclass_response ()
538 *
539 * Send answer back to remote LM-IAS
540 *
541 */
iriap_getvaluebyclass_response(struct iriap_cb * self,__u16 obj_id,__u8 ret_code,struct ias_value * value)542 static void iriap_getvaluebyclass_response(struct iriap_cb *self,
543 __u16 obj_id,
544 __u8 ret_code,
545 struct ias_value *value)
546 {
547 struct sk_buff *tx_skb;
548 int n;
549 __be32 tmp_be32;
550 __be16 tmp_be16;
551 __u8 *fp;
552
553 IRDA_DEBUG(4, "%s()\n", __func__);
554
555 IRDA_ASSERT(self != NULL, return;);
556 IRDA_ASSERT(self->magic == IAS_MAGIC, return;);
557 IRDA_ASSERT(value != NULL, return;);
558 IRDA_ASSERT(value->len <= 1024, return;);
559
560 /* Initialize variables */
561 n = 0;
562
563 /*
564 * We must adjust the size of the response after the length of the
565 * value. We add 32 bytes because of the 6 bytes for the frame and
566 * max 5 bytes for the value coding.
567 */
568 tx_skb = alloc_skb(value->len + self->max_header_size + 32,
569 GFP_ATOMIC);
570 if (!tx_skb)
571 return;
572
573 /* Reserve space for MUX and LAP header */
574 skb_reserve(tx_skb, self->max_header_size);
575 skb_put(tx_skb, 6);
576
577 fp = tx_skb->data;
578
579 /* Build frame */
580 fp[n++] = GET_VALUE_BY_CLASS | IAP_LST;
581 fp[n++] = ret_code;
582
583 /* Insert list length (MSB first) */
584 tmp_be16 = htons(0x0001);
585 memcpy(fp+n, &tmp_be16, 2); n += 2;
586
587 /* Insert object identifier ( MSB first) */
588 tmp_be16 = cpu_to_be16(obj_id);
589 memcpy(fp+n, &tmp_be16, 2); n += 2;
590
591 switch (value->type) {
592 case IAS_STRING:
593 skb_put(tx_skb, 3 + value->len);
594 fp[n++] = value->type;
595 fp[n++] = 0; /* ASCII */
596 fp[n++] = (__u8) value->len;
597 memcpy(fp+n, value->t.string, value->len); n+=value->len;
598 break;
599 case IAS_INTEGER:
600 skb_put(tx_skb, 5);
601 fp[n++] = value->type;
602
603 tmp_be32 = cpu_to_be32(value->t.integer);
604 memcpy(fp+n, &tmp_be32, 4); n += 4;
605 break;
606 case IAS_OCT_SEQ:
607 skb_put(tx_skb, 3 + value->len);
608 fp[n++] = value->type;
609
610 tmp_be16 = cpu_to_be16(value->len);
611 memcpy(fp+n, &tmp_be16, 2); n += 2;
612 memcpy(fp+n, value->t.oct_seq, value->len); n+=value->len;
613 break;
614 case IAS_MISSING:
615 IRDA_DEBUG( 3, "%s: sending IAS_MISSING\n", __func__);
616 skb_put(tx_skb, 1);
617 fp[n++] = value->type;
618 break;
619 default:
620 IRDA_DEBUG(0, "%s(), type not implemented!\n", __func__);
621 break;
622 }
623 iriap_do_r_connect_event(self, IAP_CALL_RESPONSE, tx_skb);
624
625 /* Drop reference count - see state_r_execute(). */
626 dev_kfree_skb(tx_skb);
627 }
628
629 /*
630 * Function iriap_getvaluebyclass_indication (self, skb)
631 *
632 * getvaluebyclass is requested from peer LM-IAS
633 *
634 */
iriap_getvaluebyclass_indication(struct iriap_cb * self,struct sk_buff * skb)635 static void iriap_getvaluebyclass_indication(struct iriap_cb *self,
636 struct sk_buff *skb)
637 {
638 struct ias_object *obj;
639 struct ias_attrib *attrib;
640 int name_len;
641 int attr_len;
642 char name[IAS_MAX_CLASSNAME + 1]; /* 60 bytes */
643 char attr[IAS_MAX_ATTRIBNAME + 1]; /* 60 bytes */
644 __u8 *fp;
645 int n;
646
647 IRDA_DEBUG(4, "%s()\n", __func__);
648
649 IRDA_ASSERT(self != NULL, return;);
650 IRDA_ASSERT(self->magic == IAS_MAGIC, return;);
651 IRDA_ASSERT(skb != NULL, return;);
652
653 fp = skb->data;
654 n = 1;
655
656 name_len = fp[n++];
657 memcpy(name, fp+n, name_len); n+=name_len;
658 name[name_len] = '\0';
659
660 attr_len = fp[n++];
661 memcpy(attr, fp+n, attr_len); n+=attr_len;
662 attr[attr_len] = '\0';
663
664 IRDA_DEBUG(4, "LM-IAS: Looking up %s: %s\n", name, attr);
665 obj = irias_find_object(name);
666
667 if (obj == NULL) {
668 IRDA_DEBUG(2, "LM-IAS: Object %s not found\n", name);
669 iriap_getvaluebyclass_response(self, 0x1235, IAS_CLASS_UNKNOWN,
670 &irias_missing);
671 return;
672 }
673 IRDA_DEBUG(4, "LM-IAS: found %s, id=%d\n", obj->name, obj->id);
674
675 attrib = irias_find_attrib(obj, attr);
676 if (attrib == NULL) {
677 IRDA_DEBUG(2, "LM-IAS: Attribute %s not found\n", attr);
678 iriap_getvaluebyclass_response(self, obj->id,
679 IAS_ATTRIB_UNKNOWN,
680 &irias_missing);
681 return;
682 }
683
684 /* We have a match; send the value. */
685 iriap_getvaluebyclass_response(self, obj->id, IAS_SUCCESS,
686 attrib->value);
687
688 return;
689 }
690
691 /*
692 * Function iriap_send_ack (void)
693 *
694 * Currently not used
695 *
696 */
iriap_send_ack(struct iriap_cb * self)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
iriap_connect_request(struct iriap_cb * self)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 */
iriap_connect_confirm(void * instance,void * sap,struct qos_info * qos,__u32 max_seg_size,__u8 max_header_size,struct sk_buff * skb)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 */
iriap_connect_indication(void * instance,void * sap,struct qos_info * qos,__u32 max_seg_size,__u8 max_header_size,struct sk_buff * skb)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 */
iriap_data_indication(void * instance,void * sap,struct sk_buff * skb)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 */
iriap_call_indication(struct iriap_cb * self,struct sk_buff * skb)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 */
iriap_watchdog_timer_expired(void * data)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 *ias_value_types[] = {
970 "IAS_MISSING",
971 "IAS_INTEGER",
972 "IAS_OCT_SEQ",
973 "IAS_STRING"
974 };
975
irias_seq_idx(loff_t pos)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
irias_seq_start(struct seq_file * seq,loff_t * pos)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
irias_seq_next(struct seq_file * seq,void * v,loff_t * pos)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
irias_seq_stop(struct seq_file * seq,void * v)1005 static void irias_seq_stop(struct seq_file *seq, void *v)
1006 {
1007 spin_unlock_irq(&irias_objects->hb_spinlock);
1008 }
1009
irias_seq_show(struct seq_file * seq,void * v)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
irias_seq_open(struct inode * inode,struct file * file)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 */
1094