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 /* FIXME: This one should go in irlmp.c */
47 static const char *const ias_charset_types[] __maybe_unused = {
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
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
iriap_start_watchdog_timer(struct iriap_cb * self,int timeout)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 static struct lock_class_key irias_objects_key;
89
90 /*
91 * Function iriap_init (void)
92 *
93 * Initializes the IrIAP layer, called by the module initialization code
94 * in irmod.c
95 */
iriap_init(void)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 net_warn_ratelimited("%s: Can't allocate irias_objects hashbin!\n",
112 __func__);
113 hashbin_delete(iriap, NULL);
114 return -ENOMEM;
115 }
116
117 lockdep_set_class_and_name(&irias_objects->hb_spinlock, &irias_objects_key,
118 "irias_objects");
119
120 /*
121 * Register some default services for IrLMP
122 */
123 hints = irlmp_service_to_hint(S_COMPUTER);
124 service_handle = irlmp_register_service(hints);
125
126 /* Register the Device object with LM-IAS */
127 obj = irias_new_object("Device", IAS_DEVICE_ID);
128 irias_add_string_attrib(obj, "DeviceName", "Linux", IAS_KERNEL_ATTR);
129
130 oct_seq[0] = 0x01; /* Version 1 */
131 oct_seq[1] = 0x00; /* IAS support bits */
132 oct_seq[2] = 0x00; /* LM-MUX support bits */
133 #ifdef CONFIG_IRDA_ULTRA
134 oct_seq[2] |= 0x04; /* Connectionless Data support */
135 #endif
136 irias_add_octseq_attrib(obj, "IrLMPSupport", oct_seq, 3,
137 IAS_KERNEL_ATTR);
138 irias_insert_object(obj);
139
140 /*
141 * Register server support with IrLMP so we can accept incoming
142 * connections
143 */
144 server = iriap_open(LSAP_IAS, IAS_SERVER, NULL, NULL);
145 if (!server) {
146 pr_debug("%s(), unable to open server\n", __func__);
147 return -1;
148 }
149 iriap_register_lsap(server, LSAP_IAS, IAS_SERVER);
150
151 return 0;
152 }
153
154 /*
155 * Function iriap_cleanup (void)
156 *
157 * Initializes the IrIAP layer, called by the module cleanup code in
158 * irmod.c
159 */
iriap_cleanup(void)160 void iriap_cleanup(void)
161 {
162 irlmp_unregister_service(service_handle);
163
164 hashbin_delete(iriap, (FREE_FUNC) __iriap_close);
165 hashbin_delete(irias_objects, (FREE_FUNC) __irias_delete_object);
166 }
167
168 /*
169 * Function iriap_open (void)
170 *
171 * Opens an instance of the IrIAP layer, and registers with IrLMP
172 */
iriap_open(__u8 slsap_sel,int mode,void * priv,CONFIRM_CALLBACK callback)173 struct iriap_cb *iriap_open(__u8 slsap_sel, int mode, void *priv,
174 CONFIRM_CALLBACK callback)
175 {
176 struct iriap_cb *self;
177
178 self = kzalloc(sizeof(*self), GFP_ATOMIC);
179 if (!self)
180 return NULL;
181
182 /*
183 * Initialize instance
184 */
185
186 self->magic = IAS_MAGIC;
187 self->mode = mode;
188 if (mode == IAS_CLIENT) {
189 if (iriap_register_lsap(self, slsap_sel, mode)) {
190 kfree(self);
191 return NULL;
192 }
193 }
194
195 self->confirm = callback;
196 self->priv = priv;
197
198 /* iriap_getvaluebyclass_request() will construct packets before
199 * we connect, so this must have a sane value... Jean II */
200 self->max_header_size = LMP_MAX_HEADER;
201
202 init_timer(&self->watchdog_timer);
203
204 hashbin_insert(iriap, (irda_queue_t *) self, (long) self, NULL);
205
206 /* Initialize state machines */
207 iriap_next_client_state(self, S_DISCONNECT);
208 iriap_next_call_state(self, S_MAKE_CALL);
209 iriap_next_server_state(self, R_DISCONNECT);
210 iriap_next_r_connect_state(self, R_WAITING);
211
212 return self;
213 }
214 EXPORT_SYMBOL(iriap_open);
215
216 /*
217 * Function __iriap_close (self)
218 *
219 * Removes (deallocates) the IrIAP instance
220 *
221 */
__iriap_close(struct iriap_cb * self)222 static void __iriap_close(struct iriap_cb *self)
223 {
224 IRDA_ASSERT(self != NULL, return;);
225 IRDA_ASSERT(self->magic == IAS_MAGIC, return;);
226
227 del_timer(&self->watchdog_timer);
228
229 if (self->request_skb)
230 dev_kfree_skb(self->request_skb);
231
232 self->magic = 0;
233
234 kfree(self);
235 }
236
237 /*
238 * Function iriap_close (void)
239 *
240 * Closes IrIAP and deregisters with IrLMP
241 */
iriap_close(struct iriap_cb * self)242 void iriap_close(struct iriap_cb *self)
243 {
244 struct iriap_cb *entry;
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_notify_init(¬ify);
266 notify.connect_confirm = iriap_connect_confirm;
267 notify.connect_indication = iriap_connect_indication;
268 notify.disconnect_indication = iriap_disconnect_indication;
269 notify.data_indication = iriap_data_indication;
270 notify.instance = self;
271 if (mode == IAS_CLIENT)
272 strcpy(notify.name, "IrIAS cli");
273 else
274 strcpy(notify.name, "IrIAS srv");
275
276 self->lsap = irlmp_open_lsap(slsap_sel, ¬ify, 0);
277 if (self->lsap == NULL) {
278 net_err_ratelimited("%s: Unable to allocated LSAP!\n",
279 __func__);
280 return -1;
281 }
282 self->slsap_sel = self->lsap->slsap_sel;
283
284 return 0;
285 }
286
287 /*
288 * Function iriap_disconnect_indication (handle, reason)
289 *
290 * Got disconnect, so clean up everything associated with this connection
291 *
292 */
iriap_disconnect_indication(void * instance,void * sap,LM_REASON reason,struct sk_buff * skb)293 static void iriap_disconnect_indication(void *instance, void *sap,
294 LM_REASON reason,
295 struct sk_buff *skb)
296 {
297 struct iriap_cb *self;
298
299 pr_debug("%s(), reason=%s [%d]\n", __func__,
300 irlmp_reason_str(reason), reason);
301
302 self = 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 pr_debug("%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 pr_debug("%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_ASSERT(self != NULL, return;);
344 IRDA_ASSERT(self->magic == IAS_MAGIC, return;);
345
346 tx_skb = alloc_skb(LMP_MAX_HEADER, GFP_ATOMIC);
347 if (tx_skb == NULL) {
348 pr_debug("%s(), Could not allocate an sk_buff of length %d\n",
349 __func__, LMP_MAX_HEADER);
350 return;
351 }
352
353 /*
354 * Reserve space for MUX control and LAP header
355 */
356 skb_reserve(tx_skb, LMP_MAX_HEADER);
357
358 irlmp_disconnect_request(self->lsap, tx_skb);
359 }
360
361 /*
362 * Function iriap_getvaluebyclass (addr, name, attr)
363 *
364 * Retrieve all values from attribute in all objects with given class
365 * name
366 */
iriap_getvaluebyclass_request(struct iriap_cb * self,__u32 saddr,__u32 daddr,char * name,char * attr)367 int iriap_getvaluebyclass_request(struct iriap_cb *self,
368 __u32 saddr, __u32 daddr,
369 char *name, char *attr)
370 {
371 struct sk_buff *tx_skb;
372 int name_len, attr_len, skb_len;
373 __u8 *frame;
374
375 IRDA_ASSERT(self != NULL, return -1;);
376 IRDA_ASSERT(self->magic == IAS_MAGIC, return -1;);
377
378 /* Client must supply the destination device address */
379 if (!daddr)
380 return -1;
381
382 self->daddr = daddr;
383 self->saddr = saddr;
384
385 /*
386 * Save operation, so we know what the later indication is about
387 */
388 self->operation = GET_VALUE_BY_CLASS;
389
390 /* Give ourselves 10 secs to finish this operation */
391 iriap_start_watchdog_timer(self, 10*HZ);
392
393 name_len = strlen(name); /* Up to IAS_MAX_CLASSNAME = 60 */
394 attr_len = strlen(attr); /* Up to IAS_MAX_ATTRIBNAME = 60 */
395
396 skb_len = self->max_header_size+2+name_len+1+attr_len+4;
397 tx_skb = alloc_skb(skb_len, GFP_ATOMIC);
398 if (!tx_skb)
399 return -ENOMEM;
400
401 /* Reserve space for MUX and LAP header */
402 skb_reserve(tx_skb, self->max_header_size);
403 skb_put(tx_skb, 3+name_len+attr_len);
404 frame = tx_skb->data;
405
406 /* Build frame */
407 frame[0] = IAP_LST | GET_VALUE_BY_CLASS;
408 frame[1] = name_len; /* Insert length of name */
409 memcpy(frame+2, name, name_len); /* Insert name */
410 frame[2+name_len] = attr_len; /* Insert length of attr */
411 memcpy(frame+3+name_len, attr, attr_len); /* Insert attr */
412
413 iriap_do_client_event(self, IAP_CALL_REQUEST_GVBC, tx_skb);
414
415 /* Drop reference count - see state_s_disconnect(). */
416 dev_kfree_skb(tx_skb);
417
418 return 0;
419 }
420 EXPORT_SYMBOL(iriap_getvaluebyclass_request);
421
422 /*
423 * Function iriap_getvaluebyclass_confirm (self, skb)
424 *
425 * Got result from GetValueByClass command. Parse it and return result
426 * to service user.
427 *
428 */
iriap_getvaluebyclass_confirm(struct iriap_cb * self,struct sk_buff * skb)429 static void iriap_getvaluebyclass_confirm(struct iriap_cb *self,
430 struct sk_buff *skb)
431 {
432 struct ias_value *value;
433 int charset;
434 __u32 value_len;
435 __u32 tmp_cpu32;
436 __u16 obj_id;
437 __u16 len;
438 __u8 type;
439 __u8 *fp;
440 int n;
441
442 IRDA_ASSERT(self != NULL, return;);
443 IRDA_ASSERT(self->magic == IAS_MAGIC, return;);
444 IRDA_ASSERT(skb != NULL, return;);
445
446 /* Initialize variables */
447 fp = skb->data;
448 n = 2;
449
450 /* Get length, MSB first */
451 len = get_unaligned_be16(fp + n);
452 n += 2;
453
454 pr_debug("%s(), len=%d\n", __func__, len);
455
456 /* Get object ID, MSB first */
457 obj_id = get_unaligned_be16(fp + n);
458 n += 2;
459
460 type = fp[n++];
461 pr_debug("%s(), Value type = %d\n", __func__, 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 pr_debug("%s(), lsap=%d\n", __func__, 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 pr_debug("%s(), charset [%d] %s, not supported\n",
490 __func__, charset,
491 charset < ARRAY_SIZE(ias_charset_types) ?
492 ias_charset_types[charset] :
493 "(unknown)");
494
495 /* Aborting, close connection! */
496 iriap_disconnect_request(self);
497 return;
498 /* break; */
499 }
500 value_len = fp[n++];
501 pr_debug("%s(), strlen=%d\n", __func__, value_len);
502
503 /* Make sure the string is null-terminated */
504 if (n + value_len < skb->len)
505 fp[n + value_len] = 0x00;
506 pr_debug("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 pr_debug("%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 */
iriap_getvaluebyclass_response(struct iriap_cb * self,__u16 obj_id,__u8 ret_code,struct ias_value * value)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_ASSERT(self != NULL, return;);
555 IRDA_ASSERT(self->magic == IAS_MAGIC, return;);
556 IRDA_ASSERT(value != NULL, return;);
557 IRDA_ASSERT(value->len <= 1024, return;);
558
559 /* Initialize variables */
560 n = 0;
561
562 /*
563 * We must adjust the size of the response after the length of the
564 * value. We add 32 bytes because of the 6 bytes for the frame and
565 * max 5 bytes for the value coding.
566 */
567 tx_skb = alloc_skb(value->len + self->max_header_size + 32,
568 GFP_ATOMIC);
569 if (!tx_skb)
570 return;
571
572 /* Reserve space for MUX and LAP header */
573 skb_reserve(tx_skb, self->max_header_size);
574 skb_put(tx_skb, 6);
575
576 fp = tx_skb->data;
577
578 /* Build frame */
579 fp[n++] = GET_VALUE_BY_CLASS | IAP_LST;
580 fp[n++] = ret_code;
581
582 /* Insert list length (MSB first) */
583 tmp_be16 = htons(0x0001);
584 memcpy(fp+n, &tmp_be16, 2); n += 2;
585
586 /* Insert object identifier ( MSB first) */
587 tmp_be16 = cpu_to_be16(obj_id);
588 memcpy(fp+n, &tmp_be16, 2); n += 2;
589
590 switch (value->type) {
591 case IAS_STRING:
592 skb_put(tx_skb, 3 + value->len);
593 fp[n++] = value->type;
594 fp[n++] = 0; /* ASCII */
595 fp[n++] = (__u8) value->len;
596 memcpy(fp+n, value->t.string, value->len); n+=value->len;
597 break;
598 case IAS_INTEGER:
599 skb_put(tx_skb, 5);
600 fp[n++] = value->type;
601
602 tmp_be32 = cpu_to_be32(value->t.integer);
603 memcpy(fp+n, &tmp_be32, 4); n += 4;
604 break;
605 case IAS_OCT_SEQ:
606 skb_put(tx_skb, 3 + value->len);
607 fp[n++] = value->type;
608
609 tmp_be16 = cpu_to_be16(value->len);
610 memcpy(fp+n, &tmp_be16, 2); n += 2;
611 memcpy(fp+n, value->t.oct_seq, value->len); n+=value->len;
612 break;
613 case IAS_MISSING:
614 pr_debug("%s: sending IAS_MISSING\n", __func__);
615 skb_put(tx_skb, 1);
616 fp[n++] = value->type;
617 break;
618 default:
619 pr_debug("%s(), type not implemented!\n", __func__);
620 break;
621 }
622 iriap_do_r_connect_event(self, IAP_CALL_RESPONSE, tx_skb);
623
624 /* Drop reference count - see state_r_execute(). */
625 dev_kfree_skb(tx_skb);
626 }
627
628 /*
629 * Function iriap_getvaluebyclass_indication (self, skb)
630 *
631 * getvaluebyclass is requested from peer LM-IAS
632 *
633 */
iriap_getvaluebyclass_indication(struct iriap_cb * self,struct sk_buff * skb)634 static void iriap_getvaluebyclass_indication(struct iriap_cb *self,
635 struct sk_buff *skb)
636 {
637 struct ias_object *obj;
638 struct ias_attrib *attrib;
639 int name_len;
640 int attr_len;
641 char name[IAS_MAX_CLASSNAME + 1]; /* 60 bytes */
642 char attr[IAS_MAX_ATTRIBNAME + 1]; /* 60 bytes */
643 __u8 *fp;
644 int n;
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
655 IRDA_ASSERT(name_len < IAS_MAX_CLASSNAME + 1, return;);
656
657 memcpy(name, fp+n, name_len); n+=name_len;
658 name[name_len] = '\0';
659
660 attr_len = fp[n++];
661
662 IRDA_ASSERT(attr_len < IAS_MAX_ATTRIBNAME + 1, return;);
663
664 memcpy(attr, fp+n, attr_len); n+=attr_len;
665 attr[attr_len] = '\0';
666
667 pr_debug("LM-IAS: Looking up %s: %s\n", name, attr);
668 obj = irias_find_object(name);
669
670 if (obj == NULL) {
671 pr_debug("LM-IAS: Object %s not found\n", name);
672 iriap_getvaluebyclass_response(self, 0x1235, IAS_CLASS_UNKNOWN,
673 &irias_missing);
674 return;
675 }
676 pr_debug("LM-IAS: found %s, id=%d\n", obj->name, obj->id);
677
678 attrib = irias_find_attrib(obj, attr);
679 if (attrib == NULL) {
680 pr_debug("LM-IAS: Attribute %s not found\n", attr);
681 iriap_getvaluebyclass_response(self, obj->id,
682 IAS_ATTRIB_UNKNOWN,
683 &irias_missing);
684 return;
685 }
686
687 /* We have a match; send the value. */
688 iriap_getvaluebyclass_response(self, obj->id, IAS_SUCCESS,
689 attrib->value);
690 }
691
692 /*
693 * Function iriap_send_ack (void)
694 *
695 * Currently not used
696 *
697 */
iriap_send_ack(struct iriap_cb * self)698 void iriap_send_ack(struct iriap_cb *self)
699 {
700 struct sk_buff *tx_skb;
701 __u8 *frame;
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
iriap_connect_request(struct iriap_cb * self)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 pr_debug("%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 */
iriap_connect_confirm(void * instance,void * sap,struct qos_info * qos,__u32 max_seg_size,__u8 max_header_size,struct sk_buff * skb)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 = 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 */
iriap_connect_indication(void * instance,void * sap,struct qos_info * qos,__u32 max_seg_size,__u8 max_header_size,struct sk_buff * skb)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 self = 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 pr_debug("%s(), open failed\n", __func__);
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 pr_debug("%s(), dup failed!\n", __func__);
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 */
iriap_data_indication(void * instance,void * sap,struct sk_buff * skb)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 self = instance;
827
828 IRDA_ASSERT(skb != NULL, return 0;);
829 IRDA_ASSERT(self != NULL, goto out;);
830 IRDA_ASSERT(self->magic == IAS_MAGIC, goto out;);
831
832 frame = skb->data;
833
834 if (self->mode == IAS_SERVER) {
835 /* Call server */
836 pr_debug("%s(), Calling server!\n", __func__);
837 iriap_do_r_connect_event(self, IAP_RECV_F_LST, skb);
838 goto out;
839 }
840 opcode = frame[0];
841 if (~opcode & IAP_LST) {
842 net_warn_ratelimited("%s:, IrIAS multiframe commands or results is not implemented yet!\n",
843 __func__);
844 goto out;
845 }
846
847 /* Check for ack frames since they don't contain any data */
848 if (opcode & IAP_ACK) {
849 pr_debug("%s() Got ack frame!\n", __func__);
850 goto out;
851 }
852
853 opcode &= ~IAP_LST; /* Mask away LST bit */
854
855 switch (opcode) {
856 case GET_INFO_BASE:
857 pr_debug("IrLMP GetInfoBaseDetails not implemented!\n");
858 break;
859 case GET_VALUE_BY_CLASS:
860 iriap_do_call_event(self, IAP_RECV_F_LST, NULL);
861
862 switch (frame[1]) {
863 case IAS_SUCCESS:
864 iriap_getvaluebyclass_confirm(self, skb);
865 break;
866 case IAS_CLASS_UNKNOWN:
867 pr_debug("%s(), No such class!\n", __func__);
868 /* Finished, close connection! */
869 iriap_disconnect_request(self);
870
871 /*
872 * Warning, the client might close us, so remember
873 * no to use self anymore after calling confirm
874 */
875 if (self->confirm)
876 self->confirm(IAS_CLASS_UNKNOWN, 0, NULL,
877 self->priv);
878 break;
879 case IAS_ATTRIB_UNKNOWN:
880 pr_debug("%s(), No such attribute!\n", __func__);
881 /* Finished, close connection! */
882 iriap_disconnect_request(self);
883
884 /*
885 * Warning, the client might close us, so remember
886 * no to use self anymore after calling confirm
887 */
888 if (self->confirm)
889 self->confirm(IAS_ATTRIB_UNKNOWN, 0, NULL,
890 self->priv);
891 break;
892 }
893 break;
894 default:
895 pr_debug("%s(), Unknown op-code: %02x\n", __func__,
896 opcode);
897 break;
898 }
899
900 out:
901 /* Cleanup - sub-calls will have done skb_get() as needed. */
902 dev_kfree_skb(skb);
903 return 0;
904 }
905
906 /*
907 * Function iriap_call_indication (self, skb)
908 *
909 * Received call to server from peer LM-IAS
910 *
911 */
iriap_call_indication(struct iriap_cb * self,struct sk_buff * skb)912 void iriap_call_indication(struct iriap_cb *self, struct sk_buff *skb)
913 {
914 __u8 *fp;
915 __u8 opcode;
916
917 IRDA_ASSERT(self != NULL, return;);
918 IRDA_ASSERT(self->magic == IAS_MAGIC, return;);
919 IRDA_ASSERT(skb != NULL, return;);
920
921 fp = skb->data;
922
923 opcode = fp[0];
924 if (~opcode & 0x80) {
925 net_warn_ratelimited("%s: IrIAS multiframe commands or results is not implemented yet!\n",
926 __func__);
927 return;
928 }
929 opcode &= 0x7f; /* Mask away LST bit */
930
931 switch (opcode) {
932 case GET_INFO_BASE:
933 net_warn_ratelimited("%s: GetInfoBaseDetails not implemented yet!\n",
934 __func__);
935 break;
936 case GET_VALUE_BY_CLASS:
937 iriap_getvaluebyclass_indication(self, skb);
938 break;
939 }
940 /* skb will be cleaned up in iriap_data_indication */
941 }
942
943 /*
944 * Function iriap_watchdog_timer_expired (data)
945 *
946 * Query has taken too long time, so abort
947 *
948 */
iriap_watchdog_timer_expired(void * data)949 static void iriap_watchdog_timer_expired(void *data)
950 {
951 struct iriap_cb *self = (struct iriap_cb *) data;
952
953 IRDA_ASSERT(self != NULL, return;);
954 IRDA_ASSERT(self->magic == IAS_MAGIC, return;);
955
956 /* iriap_close(self); */
957 }
958
959 #ifdef CONFIG_PROC_FS
960
961 static const char *const ias_value_types[] = {
962 "IAS_MISSING",
963 "IAS_INTEGER",
964 "IAS_OCT_SEQ",
965 "IAS_STRING"
966 };
967
irias_seq_idx(loff_t pos)968 static inline struct ias_object *irias_seq_idx(loff_t pos)
969 {
970 struct ias_object *obj;
971
972 for (obj = (struct ias_object *) hashbin_get_first(irias_objects);
973 obj; obj = (struct ias_object *) hashbin_get_next(irias_objects)) {
974 if (pos-- == 0)
975 break;
976 }
977
978 return obj;
979 }
980
irias_seq_start(struct seq_file * seq,loff_t * pos)981 static void *irias_seq_start(struct seq_file *seq, loff_t *pos)
982 {
983 spin_lock_irq(&irias_objects->hb_spinlock);
984
985 return *pos ? irias_seq_idx(*pos - 1) : SEQ_START_TOKEN;
986 }
987
irias_seq_next(struct seq_file * seq,void * v,loff_t * pos)988 static void *irias_seq_next(struct seq_file *seq, void *v, loff_t *pos)
989 {
990 ++*pos;
991
992 return (v == SEQ_START_TOKEN)
993 ? (void *) hashbin_get_first(irias_objects)
994 : (void *) hashbin_get_next(irias_objects);
995 }
996
irias_seq_stop(struct seq_file * seq,void * v)997 static void irias_seq_stop(struct seq_file *seq, void *v)
998 {
999 spin_unlock_irq(&irias_objects->hb_spinlock);
1000 }
1001
irias_seq_show(struct seq_file * seq,void * v)1002 static int irias_seq_show(struct seq_file *seq, void *v)
1003 {
1004 if (v == SEQ_START_TOKEN)
1005 seq_puts(seq, "LM-IAS Objects:\n");
1006 else {
1007 struct ias_object *obj = v;
1008 struct ias_attrib *attrib;
1009
1010 IRDA_ASSERT(obj->magic == IAS_OBJECT_MAGIC, return -EINVAL;);
1011
1012 seq_printf(seq, "name: %s, id=%d\n",
1013 obj->name, obj->id);
1014
1015 /* Careful for priority inversions here !
1016 * All other uses of attrib spinlock are independent of
1017 * the object spinlock, so we are safe. Jean II */
1018 spin_lock(&obj->attribs->hb_spinlock);
1019
1020 /* List all attributes for this object */
1021 for (attrib = (struct ias_attrib *) hashbin_get_first(obj->attribs);
1022 attrib != NULL;
1023 attrib = (struct ias_attrib *) hashbin_get_next(obj->attribs)) {
1024
1025 IRDA_ASSERT(attrib->magic == IAS_ATTRIB_MAGIC,
1026 goto outloop; );
1027
1028 seq_printf(seq, " - Attribute name: \"%s\", ",
1029 attrib->name);
1030 seq_printf(seq, "value[%s]: ",
1031 ias_value_types[attrib->value->type]);
1032
1033 switch (attrib->value->type) {
1034 case IAS_INTEGER:
1035 seq_printf(seq, "%d\n",
1036 attrib->value->t.integer);
1037 break;
1038 case IAS_STRING:
1039 seq_printf(seq, "\"%s\"\n",
1040 attrib->value->t.string);
1041 break;
1042 case IAS_OCT_SEQ:
1043 seq_printf(seq, "octet sequence (%d bytes)\n",
1044 attrib->value->len);
1045 break;
1046 case IAS_MISSING:
1047 seq_puts(seq, "missing\n");
1048 break;
1049 default:
1050 seq_printf(seq, "type %d?\n",
1051 attrib->value->type);
1052 }
1053 seq_putc(seq, '\n');
1054
1055 }
1056 IRDA_ASSERT_LABEL(outloop:)
1057 spin_unlock(&obj->attribs->hb_spinlock);
1058 }
1059
1060 return 0;
1061 }
1062
1063 static const struct seq_operations irias_seq_ops = {
1064 .start = irias_seq_start,
1065 .next = irias_seq_next,
1066 .stop = irias_seq_stop,
1067 .show = irias_seq_show,
1068 };
1069
irias_seq_open(struct inode * inode,struct file * file)1070 static int irias_seq_open(struct inode *inode, struct file *file)
1071 {
1072 IRDA_ASSERT( irias_objects != NULL, return -EINVAL;);
1073
1074 return seq_open(file, &irias_seq_ops);
1075 }
1076
1077 const struct file_operations irias_seq_fops = {
1078 .owner = THIS_MODULE,
1079 .open = irias_seq_open,
1080 .read = seq_read,
1081 .llseek = seq_lseek,
1082 .release = seq_release,
1083 };
1084
1085 #endif /* PROC_FS */
1086