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i2c: Fix error value returned by several bus drivers
[linux-2.6/linux-acpi-2.6/ibm-acpi-2.6.git] / net / bluetooth / hci_conn.c
blobbcd158f40bb9e4d7a7fa5c167c1281779d60847d
1 /*
2 BlueZ - Bluetooth protocol stack for Linux
3 Copyright (c) 2000-2001, 2010, Code Aurora Forum. All rights reserved.
4
5 Written 2000,2001 by Maxim Krasnyansky <maxk@qualcomm.com>
6
7 This program is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License version 2 as
9 published by the Free Software Foundation;
10
11 THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
12 OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
13 FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT OF THIRD PARTY RIGHTS.
14 IN NO EVENT SHALL THE COPYRIGHT HOLDER(S) AND AUTHOR(S) BE LIABLE FOR ANY
15 CLAIM, OR ANY SPECIAL INDIRECT OR CONSEQUENTIAL DAMAGES, OR ANY DAMAGES
16 WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
17 ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
18 OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
19
20 ALL LIABILITY, INCLUDING LIABILITY FOR INFRINGEMENT OF ANY PATENTS,
21 COPYRIGHTS, TRADEMARKS OR OTHER RIGHTS, RELATING TO USE OF THIS
22 SOFTWARE IS DISCLAIMED.
23 */
24
25 /* Bluetooth HCI connection handling. */
26
27 #include <linux/module.h>
28
29 #include <linux/types.h>
30 #include <linux/errno.h>
31 #include <linux/kernel.h>
32 #include <linux/slab.h>
33 #include <linux/poll.h>
34 #include <linux/fcntl.h>
35 #include <linux/init.h>
36 #include <linux/skbuff.h>
37 #include <linux/interrupt.h>
38 #include <linux/notifier.h>
39 #include <net/sock.h>
40
41 #include <asm/system.h>
42 #include <linux/uaccess.h>
43 #include <asm/unaligned.h>
44
45 #include <net/bluetooth/bluetooth.h>
46 #include <net/bluetooth/hci_core.h>
47
48 static void hci_le_connect(struct hci_conn *conn)
49 {
50 struct hci_dev *hdev = conn->hdev;
51 struct hci_cp_le_create_conn cp;
52
53 conn->state = BT_CONNECT;
54 conn->out = 1;
55 conn->link_mode |= HCI_LM_MASTER;
56
57 memset(&cp, 0, sizeof(cp));
58 cp.scan_interval = cpu_to_le16(0x0004);
59 cp.scan_window = cpu_to_le16(0x0004);
60 bacpy(&cp.peer_addr, &conn->dst);
61 cp.conn_interval_min = cpu_to_le16(0x0008);
62 cp.conn_interval_max = cpu_to_le16(0x0100);
63 cp.supervision_timeout = cpu_to_le16(0x0064);
64 cp.min_ce_len = cpu_to_le16(0x0001);
65 cp.max_ce_len = cpu_to_le16(0x0001);
66
67 hci_send_cmd(hdev, HCI_OP_LE_CREATE_CONN, sizeof(cp), &cp);
68 }
69
70 static void hci_le_connect_cancel(struct hci_conn *conn)
71 {
72 hci_send_cmd(conn->hdev, HCI_OP_LE_CREATE_CONN_CANCEL, 0, NULL);
73 }
74
75 void hci_acl_connect(struct hci_conn *conn)
76 {
77 struct hci_dev *hdev = conn->hdev;
78 struct inquiry_entry *ie;
79 struct hci_cp_create_conn cp;
80
81 BT_DBG("%p", conn);
82
83 conn->state = BT_CONNECT;
84 conn->out = 1;
85
86 conn->link_mode = HCI_LM_MASTER;
87
88 conn->attempt++;
89
90 conn->link_policy = hdev->link_policy;
91
92 memset(&cp, 0, sizeof(cp));
93 bacpy(&cp.bdaddr, &conn->dst);
94 cp.pscan_rep_mode = 0x02;
95
96 ie = hci_inquiry_cache_lookup(hdev, &conn->dst);
97 if (ie) {
98 if (inquiry_entry_age(ie) <= INQUIRY_ENTRY_AGE_MAX) {
99 cp.pscan_rep_mode = ie->data.pscan_rep_mode;
100 cp.pscan_mode = ie->data.pscan_mode;
101 cp.clock_offset = ie->data.clock_offset |
102 cpu_to_le16(0x8000);
103 }
104
105 memcpy(conn->dev_class, ie->data.dev_class, 3);
106 conn->ssp_mode = ie->data.ssp_mode;
107 }
108
109 cp.pkt_type = cpu_to_le16(conn->pkt_type);
110 if (lmp_rswitch_capable(hdev) && !(hdev->link_mode & HCI_LM_MASTER))
111 cp.role_switch = 0x01;
112 else
113 cp.role_switch = 0x00;
114
115 hci_send_cmd(hdev, HCI_OP_CREATE_CONN, sizeof(cp), &cp);
116 }
117
118 static void hci_acl_connect_cancel(struct hci_conn *conn)
119 {
120 struct hci_cp_create_conn_cancel cp;
121
122 BT_DBG("%p", conn);
123
124 if (conn->hdev->hci_ver < 2)
125 return;
126
127 bacpy(&cp.bdaddr, &conn->dst);
128 hci_send_cmd(conn->hdev, HCI_OP_CREATE_CONN_CANCEL, sizeof(cp), &cp);
129 }
130
131 void hci_acl_disconn(struct hci_conn *conn, __u8 reason)
132 {
133 struct hci_cp_disconnect cp;
134
135 BT_DBG("%p", conn);
136
137 conn->state = BT_DISCONN;
138
139 cp.handle = cpu_to_le16(conn->handle);
140 cp.reason = reason;
141 hci_send_cmd(conn->hdev, HCI_OP_DISCONNECT, sizeof(cp), &cp);
142 }
143
144 void hci_add_sco(struct hci_conn *conn, __u16 handle)
145 {
146 struct hci_dev *hdev = conn->hdev;
147 struct hci_cp_add_sco cp;
148
149 BT_DBG("%p", conn);
150
151 conn->state = BT_CONNECT;
152 conn->out = 1;
153
154 conn->attempt++;
155
156 cp.handle = cpu_to_le16(handle);
157 cp.pkt_type = cpu_to_le16(conn->pkt_type);
158
159 hci_send_cmd(hdev, HCI_OP_ADD_SCO, sizeof(cp), &cp);
160 }
161
162 void hci_setup_sync(struct hci_conn *conn, __u16 handle)
163 {
164 struct hci_dev *hdev = conn->hdev;
165 struct hci_cp_setup_sync_conn cp;
166
167 BT_DBG("%p", conn);
168
169 conn->state = BT_CONNECT;
170 conn->out = 1;
171
172 conn->attempt++;
173
174 cp.handle = cpu_to_le16(handle);
175 cp.pkt_type = cpu_to_le16(conn->pkt_type);
176
177 cp.tx_bandwidth = cpu_to_le32(0x00001f40);
178 cp.rx_bandwidth = cpu_to_le32(0x00001f40);
179 cp.max_latency = cpu_to_le16(0xffff);
180 cp.voice_setting = cpu_to_le16(hdev->voice_setting);
181 cp.retrans_effort = 0xff;
182
183 hci_send_cmd(hdev, HCI_OP_SETUP_SYNC_CONN, sizeof(cp), &cp);
184 }
185
186 void hci_le_conn_update(struct hci_conn *conn, u16 min, u16 max,
187 u16 latency, u16 to_multiplier)
188 {
189 struct hci_cp_le_conn_update cp;
190 struct hci_dev *hdev = conn->hdev;
191
192 memset(&cp, 0, sizeof(cp));
193
194 cp.handle = cpu_to_le16(conn->handle);
195 cp.conn_interval_min = cpu_to_le16(min);
196 cp.conn_interval_max = cpu_to_le16(max);
197 cp.conn_latency = cpu_to_le16(latency);
198 cp.supervision_timeout = cpu_to_le16(to_multiplier);
199 cp.min_ce_len = cpu_to_le16(0x0001);
200 cp.max_ce_len = cpu_to_le16(0x0001);
201
202 hci_send_cmd(hdev, HCI_OP_LE_CONN_UPDATE, sizeof(cp), &cp);
203 }
204 EXPORT_SYMBOL(hci_le_conn_update);
205
206 /* Device _must_ be locked */
207 void hci_sco_setup(struct hci_conn *conn, __u8 status)
208 {
209 struct hci_conn *sco = conn->link;
210
211 BT_DBG("%p", conn);
212
213 if (!sco)
214 return;
215
216 if (!status) {
217 if (lmp_esco_capable(conn->hdev))
218 hci_setup_sync(sco, conn->handle);
219 else
220 hci_add_sco(sco, conn->handle);
221 } else {
222 hci_proto_connect_cfm(sco, status);
223 hci_conn_del(sco);
224 }
225 }
226
227 static void hci_conn_timeout(unsigned long arg)
228 {
229 struct hci_conn *conn = (void *) arg;
230 struct hci_dev *hdev = conn->hdev;
231 __u8 reason;
232
233 BT_DBG("conn %p state %d", conn, conn->state);
234
235 if (atomic_read(&conn->refcnt))
236 return;
237
238 hci_dev_lock(hdev);
239
240 switch (conn->state) {
241 case BT_CONNECT:
242 case BT_CONNECT2:
243 if (conn->out) {
244 if (conn->type == ACL_LINK)
245 hci_acl_connect_cancel(conn);
246 else if (conn->type == LE_LINK)
247 hci_le_connect_cancel(conn);
248 }
249 break;
250 case BT_CONFIG:
251 case BT_CONNECTED:
252 reason = hci_proto_disconn_ind(conn);
253 hci_acl_disconn(conn, reason);
254 break;
255 default:
256 conn->state = BT_CLOSED;
257 break;
258 }
259
260 hci_dev_unlock(hdev);
261 }
262
263 static void hci_conn_idle(unsigned long arg)
264 {
265 struct hci_conn *conn = (void *) arg;
266
267 BT_DBG("conn %p mode %d", conn, conn->mode);
268
269 hci_conn_enter_sniff_mode(conn);
270 }
271
272 static void hci_conn_auto_accept(unsigned long arg)
273 {
274 struct hci_conn *conn = (void *) arg;
275 struct hci_dev *hdev = conn->hdev;
276
277 hci_dev_lock(hdev);
278
279 hci_send_cmd(hdev, HCI_OP_USER_CONFIRM_REPLY, sizeof(conn->dst),
280 &conn->dst);
281
282 hci_dev_unlock(hdev);
283 }
284
285 struct hci_conn *hci_conn_add(struct hci_dev *hdev, int type, bdaddr_t *dst)
286 {
287 struct hci_conn *conn;
288
289 BT_DBG("%s dst %s", hdev->name, batostr(dst));
290
291 conn = kzalloc(sizeof(struct hci_conn), GFP_ATOMIC);
292 if (!conn)
293 return NULL;
294
295 bacpy(&conn->dst, dst);
296 conn->hdev = hdev;
297 conn->type = type;
298 conn->mode = HCI_CM_ACTIVE;
299 conn->state = BT_OPEN;
300 conn->auth_type = HCI_AT_GENERAL_BONDING;
301 conn->io_capability = hdev->io_capability;
302 conn->remote_auth = 0xff;
303 conn->key_type = 0xff;
304
305 conn->power_save = 1;
306 conn->disc_timeout = HCI_DISCONN_TIMEOUT;
307
308 switch (type) {
309 case ACL_LINK:
310 conn->pkt_type = hdev->pkt_type & ACL_PTYPE_MASK;
311 break;
312 case SCO_LINK:
313 if (lmp_esco_capable(hdev))
314 conn->pkt_type = (hdev->esco_type & SCO_ESCO_MASK) |
315 (hdev->esco_type & EDR_ESCO_MASK);
316 else
317 conn->pkt_type = hdev->pkt_type & SCO_PTYPE_MASK;
318 break;
319 case ESCO_LINK:
320 conn->pkt_type = hdev->esco_type & ~EDR_ESCO_MASK;
321 break;
322 }
323
324 skb_queue_head_init(&conn->data_q);
325
326 setup_timer(&conn->disc_timer, hci_conn_timeout, (unsigned long)conn);
327 setup_timer(&conn->idle_timer, hci_conn_idle, (unsigned long)conn);
328 setup_timer(&conn->auto_accept_timer, hci_conn_auto_accept,
329 (unsigned long) conn);
330
331 atomic_set(&conn->refcnt, 0);
332
333 hci_dev_hold(hdev);
334
335 tasklet_disable(&hdev->tx_task);
336
337 hci_conn_hash_add(hdev, conn);
338 if (hdev->notify)
339 hdev->notify(hdev, HCI_NOTIFY_CONN_ADD);
340
341 atomic_set(&conn->devref, 0);
342
343 hci_conn_init_sysfs(conn);
344
345 tasklet_enable(&hdev->tx_task);
346
347 return conn;
348 }
349
350 int hci_conn_del(struct hci_conn *conn)
351 {
352 struct hci_dev *hdev = conn->hdev;
353
354 BT_DBG("%s conn %p handle %d", hdev->name, conn, conn->handle);
355
356 del_timer(&conn->idle_timer);
357
358 del_timer(&conn->disc_timer);
359
360 del_timer(&conn->auto_accept_timer);
361
362 if (conn->type == ACL_LINK) {
363 struct hci_conn *sco = conn->link;
364 if (sco)
365 sco->link = NULL;
366
367 /* Unacked frames */
368 hdev->acl_cnt += conn->sent;
369 } else if (conn->type == LE_LINK) {
370 if (hdev->le_pkts)
371 hdev->le_cnt += conn->sent;
372 else
373 hdev->acl_cnt += conn->sent;
374 } else {
375 struct hci_conn *acl = conn->link;
376 if (acl) {
377 acl->link = NULL;
378 hci_conn_put(acl);
379 }
380 }
381
382 tasklet_disable(&hdev->tx_task);
383
384 hci_conn_hash_del(hdev, conn);
385 if (hdev->notify)
386 hdev->notify(hdev, HCI_NOTIFY_CONN_DEL);
387
388 tasklet_enable(&hdev->tx_task);
389
390 skb_queue_purge(&conn->data_q);
391
392 hci_conn_put_device(conn);
393
394 hci_dev_put(hdev);
395
396 if (conn->handle == 0)
397 kfree(conn);
398
399 return 0;
400 }
401
402 struct hci_dev *hci_get_route(bdaddr_t *dst, bdaddr_t *src)
403 {
404 int use_src = bacmp(src, BDADDR_ANY);
405 struct hci_dev *hdev = NULL;
406 struct list_head *p;
407
408 BT_DBG("%s -> %s", batostr(src), batostr(dst));
409
410 read_lock_bh(&hci_dev_list_lock);
411
412 list_for_each(p, &hci_dev_list) {
413 struct hci_dev *d = list_entry(p, struct hci_dev, list);
414
415 if (!test_bit(HCI_UP, &d->flags) || test_bit(HCI_RAW, &d->flags))
416 continue;
417
418 /* Simple routing:
419 * No source address - find interface with bdaddr != dst
420 * Source address - find interface with bdaddr == src
421 */
422
423 if (use_src) {
424 if (!bacmp(&d->bdaddr, src)) {
425 hdev = d; break;
426 }
427 } else {
428 if (bacmp(&d->bdaddr, dst)) {
429 hdev = d; break;
430 }
431 }
432 }
433
434 if (hdev)
435 hdev = hci_dev_hold(hdev);
436
437 read_unlock_bh(&hci_dev_list_lock);
438 return hdev;
439 }
440 EXPORT_SYMBOL(hci_get_route);
441
442 /* Create SCO, ACL or LE connection.
443 * Device _must_ be locked */
444 struct hci_conn *hci_connect(struct hci_dev *hdev, int type, bdaddr_t *dst, __u8 sec_level, __u8 auth_type)
445 {
446 struct hci_conn *acl;
447 struct hci_conn *sco;
448 struct hci_conn *le;
449
450 BT_DBG("%s dst %s", hdev->name, batostr(dst));
451
452 if (type == LE_LINK) {
453 le = hci_conn_hash_lookup_ba(hdev, LE_LINK, dst);
454 if (le)
455 return ERR_PTR(-EBUSY);
456 le = hci_conn_add(hdev, LE_LINK, dst);
457 if (!le)
458 return ERR_PTR(-ENOMEM);
459 if (le->state == BT_OPEN)
460 hci_le_connect(le);
461
462 hci_conn_hold(le);
463
464 return le;
465 }
466
467 acl = hci_conn_hash_lookup_ba(hdev, ACL_LINK, dst);
468 if (!acl) {
469 acl = hci_conn_add(hdev, ACL_LINK, dst);
470 if (!acl)
471 return NULL;
472 }
473
474 hci_conn_hold(acl);
475
476 if (acl->state == BT_OPEN || acl->state == BT_CLOSED) {
477 acl->sec_level = BT_SECURITY_LOW;
478 acl->pending_sec_level = sec_level;
479 acl->auth_type = auth_type;
480 hci_acl_connect(acl);
481 }
482
483 if (type == ACL_LINK)
484 return acl;
485
486 sco = hci_conn_hash_lookup_ba(hdev, type, dst);
487 if (!sco) {
488 sco = hci_conn_add(hdev, type, dst);
489 if (!sco) {
490 hci_conn_put(acl);
491 return NULL;
492 }
493 }
494
495 acl->link = sco;
496 sco->link = acl;
497
498 hci_conn_hold(sco);
499
500 if (acl->state == BT_CONNECTED &&
501 (sco->state == BT_OPEN || sco->state == BT_CLOSED)) {
502 acl->power_save = 1;
503 hci_conn_enter_active_mode(acl);
504
505 if (test_bit(HCI_CONN_MODE_CHANGE_PEND, &acl->pend)) {
506 /* defer SCO setup until mode change completed */
507 set_bit(HCI_CONN_SCO_SETUP_PEND, &acl->pend);
508 return sco;
509 }
510
511 hci_sco_setup(acl, 0x00);
512 }
513
514 return sco;
515 }
516 EXPORT_SYMBOL(hci_connect);
517
518 /* Check link security requirement */
519 int hci_conn_check_link_mode(struct hci_conn *conn)
520 {
521 BT_DBG("conn %p", conn);
522
523 if (conn->ssp_mode > 0 && conn->hdev->ssp_mode > 0 &&
524 !(conn->link_mode & HCI_LM_ENCRYPT))
525 return 0;
526
527 return 1;
528 }
529 EXPORT_SYMBOL(hci_conn_check_link_mode);
530
531 /* Authenticate remote device */
532 static int hci_conn_auth(struct hci_conn *conn, __u8 sec_level, __u8 auth_type)
533 {
534 BT_DBG("conn %p", conn);
535
536 if (conn->pending_sec_level > sec_level)
537 sec_level = conn->pending_sec_level;
538
539 if (sec_level > conn->sec_level)
540 conn->pending_sec_level = sec_level;
541 else if (conn->link_mode & HCI_LM_AUTH)
542 return 1;
543
544 /* Make sure we preserve an existing MITM requirement*/
545 auth_type |= (conn->auth_type & 0x01);
546
547 conn->auth_type = auth_type;
548
549 if (!test_and_set_bit(HCI_CONN_AUTH_PEND, &conn->pend)) {
550 struct hci_cp_auth_requested cp;
551 cp.handle = cpu_to_le16(conn->handle);
552 hci_send_cmd(conn->hdev, HCI_OP_AUTH_REQUESTED,
553 sizeof(cp), &cp);
554 }
555
556 return 0;
557 }
558
559 /* Encrypt the the link */
560 static void hci_conn_encrypt(struct hci_conn *conn)
561 {
562 BT_DBG("conn %p", conn);
563
564 if (!test_and_set_bit(HCI_CONN_ENCRYPT_PEND, &conn->pend)) {
565 struct hci_cp_set_conn_encrypt cp;
566 cp.handle = cpu_to_le16(conn->handle);
567 cp.encrypt = 0x01;
568 hci_send_cmd(conn->hdev, HCI_OP_SET_CONN_ENCRYPT, sizeof(cp),
569 &cp);
570 }
571 }
572
573 /* Enable security */
574 int hci_conn_security(struct hci_conn *conn, __u8 sec_level, __u8 auth_type)
575 {
576 BT_DBG("conn %p", conn);
577
578 /* For sdp we don't need the link key. */
579 if (sec_level == BT_SECURITY_SDP)
580 return 1;
581
582 /* For non 2.1 devices and low security level we don't need the link
583 key. */
584 if (sec_level == BT_SECURITY_LOW &&
585 (!conn->ssp_mode || !conn->hdev->ssp_mode))
586 return 1;
587
588 /* For other security levels we need the link key. */
589 if (!(conn->link_mode & HCI_LM_AUTH))
590 goto auth;
591
592 /* An authenticated combination key has sufficient security for any
593 security level. */
594 if (conn->key_type == HCI_LK_AUTH_COMBINATION)
595 goto encrypt;
596
597 /* An unauthenticated combination key has sufficient security for
598 security level 1 and 2. */
599 if (conn->key_type == HCI_LK_UNAUTH_COMBINATION &&
600 (sec_level == BT_SECURITY_MEDIUM ||
601 sec_level == BT_SECURITY_LOW))
602 goto encrypt;
603
604 /* A combination key has always sufficient security for the security
605 levels 1 or 2. High security level requires the combination key
606 is generated using maximum PIN code length (16).
607 For pre 2.1 units. */
608 if (conn->key_type == HCI_LK_COMBINATION &&
609 (sec_level != BT_SECURITY_HIGH ||
610 conn->pin_length == 16))
611 goto encrypt;
612
613 auth:
614 if (test_bit(HCI_CONN_ENCRYPT_PEND, &conn->pend))
615 return 0;
616
617 if (!hci_conn_auth(conn, sec_level, auth_type))
618 return 0;
619
620 encrypt:
621 if (conn->link_mode & HCI_LM_ENCRYPT)
622 return 1;
623
624 hci_conn_encrypt(conn);
625 return 0;
626 }
627 EXPORT_SYMBOL(hci_conn_security);
628
629 /* Check secure link requirement */
630 int hci_conn_check_secure(struct hci_conn *conn, __u8 sec_level)
631 {
632 BT_DBG("conn %p", conn);
633
634 if (sec_level != BT_SECURITY_HIGH)
635 return 1; /* Accept if non-secure is required */
636
637 if (conn->key_type == HCI_LK_AUTH_COMBINATION ||
638 (conn->key_type == HCI_LK_COMBINATION &&
639 conn->pin_length == 16))
640 return 1;
641
642 return 0; /* Reject not secure link */
643 }
644 EXPORT_SYMBOL(hci_conn_check_secure);
645
646 /* Change link key */
647 int hci_conn_change_link_key(struct hci_conn *conn)
648 {
649 BT_DBG("conn %p", conn);
650
651 if (!test_and_set_bit(HCI_CONN_AUTH_PEND, &conn->pend)) {
652 struct hci_cp_change_conn_link_key cp;
653 cp.handle = cpu_to_le16(conn->handle);
654 hci_send_cmd(conn->hdev, HCI_OP_CHANGE_CONN_LINK_KEY,
655 sizeof(cp), &cp);
656 }
657
658 return 0;
659 }
660 EXPORT_SYMBOL(hci_conn_change_link_key);
661
662 /* Switch role */
663 int hci_conn_switch_role(struct hci_conn *conn, __u8 role)
664 {
665 BT_DBG("conn %p", conn);
666
667 if (!role && conn->link_mode & HCI_LM_MASTER)
668 return 1;
669
670 if (!test_and_set_bit(HCI_CONN_RSWITCH_PEND, &conn->pend)) {
671 struct hci_cp_switch_role cp;
672 bacpy(&cp.bdaddr, &conn->dst);
673 cp.role = role;
674 hci_send_cmd(conn->hdev, HCI_OP_SWITCH_ROLE, sizeof(cp), &cp);
675 }
676
677 return 0;
678 }
679 EXPORT_SYMBOL(hci_conn_switch_role);
680
681 /* Enter active mode */
682 void hci_conn_enter_active_mode(struct hci_conn *conn)
683 {
684 struct hci_dev *hdev = conn->hdev;
685
686 BT_DBG("conn %p mode %d", conn, conn->mode);
687
688 if (test_bit(HCI_RAW, &hdev->flags))
689 return;
690
691 if (conn->mode != HCI_CM_SNIFF || !conn->power_save)
692 goto timer;
693
694 if (!test_and_set_bit(HCI_CONN_MODE_CHANGE_PEND, &conn->pend)) {
695 struct hci_cp_exit_sniff_mode cp;
696 cp.handle = cpu_to_le16(conn->handle);
697 hci_send_cmd(hdev, HCI_OP_EXIT_SNIFF_MODE, sizeof(cp), &cp);
698 }
699
700 timer:
701 if (hdev->idle_timeout > 0)
702 mod_timer(&conn->idle_timer,
703 jiffies + msecs_to_jiffies(hdev->idle_timeout));
704 }
705
706 /* Enter sniff mode */
707 void hci_conn_enter_sniff_mode(struct hci_conn *conn)
708 {
709 struct hci_dev *hdev = conn->hdev;
710
711 BT_DBG("conn %p mode %d", conn, conn->mode);
712
713 if (test_bit(HCI_RAW, &hdev->flags))
714 return;
715
716 if (!lmp_sniff_capable(hdev) || !lmp_sniff_capable(conn))
717 return;
718
719 if (conn->mode != HCI_CM_ACTIVE || !(conn->link_policy & HCI_LP_SNIFF))
720 return;
721
722 if (lmp_sniffsubr_capable(hdev) && lmp_sniffsubr_capable(conn)) {
723 struct hci_cp_sniff_subrate cp;
724 cp.handle = cpu_to_le16(conn->handle);
725 cp.max_latency = cpu_to_le16(0);
726 cp.min_remote_timeout = cpu_to_le16(0);
727 cp.min_local_timeout = cpu_to_le16(0);
728 hci_send_cmd(hdev, HCI_OP_SNIFF_SUBRATE, sizeof(cp), &cp);
729 }
730
731 if (!test_and_set_bit(HCI_CONN_MODE_CHANGE_PEND, &conn->pend)) {
732 struct hci_cp_sniff_mode cp;
733 cp.handle = cpu_to_le16(conn->handle);
734 cp.max_interval = cpu_to_le16(hdev->sniff_max_interval);
735 cp.min_interval = cpu_to_le16(hdev->sniff_min_interval);
736 cp.attempt = cpu_to_le16(4);
737 cp.timeout = cpu_to_le16(1);
738 hci_send_cmd(hdev, HCI_OP_SNIFF_MODE, sizeof(cp), &cp);
739 }
740 }
741
742 /* Drop all connection on the device */
743 void hci_conn_hash_flush(struct hci_dev *hdev)
744 {
745 struct hci_conn_hash *h = &hdev->conn_hash;
746 struct list_head *p;
747
748 BT_DBG("hdev %s", hdev->name);
749
750 p = h->list.next;
751 while (p != &h->list) {
752 struct hci_conn *c;
753
754 c = list_entry(p, struct hci_conn, list);
755 p = p->next;
756
757 c->state = BT_CLOSED;
758
759 hci_proto_disconn_cfm(c, 0x16);
760 hci_conn_del(c);
761 }
762 }
763
764 /* Check pending connect attempts */
765 void hci_conn_check_pending(struct hci_dev *hdev)
766 {
767 struct hci_conn *conn;
768
769 BT_DBG("hdev %s", hdev->name);
770
771 hci_dev_lock(hdev);
772
773 conn = hci_conn_hash_lookup_state(hdev, ACL_LINK, BT_CONNECT2);
774 if (conn)
775 hci_acl_connect(conn);
776
777 hci_dev_unlock(hdev);
778 }
779
780 void hci_conn_hold_device(struct hci_conn *conn)
781 {
782 atomic_inc(&conn->devref);
783 }
784 EXPORT_SYMBOL(hci_conn_hold_device);
785
786 void hci_conn_put_device(struct hci_conn *conn)
787 {
788 if (atomic_dec_and_test(&conn->devref))
789 hci_conn_del_sysfs(conn);
790 }
791 EXPORT_SYMBOL(hci_conn_put_device);
792
793 int hci_get_conn_list(void __user *arg)
794 {
795 struct hci_conn_list_req req, *cl;
796 struct hci_conn_info *ci;
797 struct hci_dev *hdev;
798 struct list_head *p;
799 int n = 0, size, err;
800
801 if (copy_from_user(&req, arg, sizeof(req)))
802 return -EFAULT;
803
804 if (!req.conn_num || req.conn_num > (PAGE_SIZE * 2) / sizeof(*ci))
805 return -EINVAL;
806
807 size = sizeof(req) + req.conn_num * sizeof(*ci);
808
809 cl = kmalloc(size, GFP_KERNEL);
810 if (!cl)
811 return -ENOMEM;
812
813 hdev = hci_dev_get(req.dev_id);
814 if (!hdev) {
815 kfree(cl);
816 return -ENODEV;
817 }
818
819 ci = cl->conn_info;
820
821 hci_dev_lock_bh(hdev);
822 list_for_each(p, &hdev->conn_hash.list) {
823 register struct hci_conn *c;
824 c = list_entry(p, struct hci_conn, list);
825
826 bacpy(&(ci + n)->bdaddr, &c->dst);
827 (ci + n)->handle = c->handle;
828 (ci + n)->type = c->type;
829 (ci + n)->out = c->out;
830 (ci + n)->state = c->state;
831 (ci + n)->link_mode = c->link_mode;
832 if (++n >= req.conn_num)
833 break;
834 }
835 hci_dev_unlock_bh(hdev);
836
837 cl->dev_id = hdev->id;
838 cl->conn_num = n;
839 size = sizeof(req) + n * sizeof(*ci);
840
841 hci_dev_put(hdev);
842
843 err = copy_to_user(arg, cl, size);
844 kfree(cl);
845
846 return err ? -EFAULT : 0;
847 }
848
849 int hci_get_conn_info(struct hci_dev *hdev, void __user *arg)
850 {
851 struct hci_conn_info_req req;
852 struct hci_conn_info ci;
853 struct hci_conn *conn;
854 char __user *ptr = arg + sizeof(req);
855
856 if (copy_from_user(&req, arg, sizeof(req)))
857 return -EFAULT;
858
859 hci_dev_lock_bh(hdev);
860 conn = hci_conn_hash_lookup_ba(hdev, req.type, &req.bdaddr);
861 if (conn) {
862 bacpy(&ci.bdaddr, &conn->dst);
863 ci.handle = conn->handle;
864 ci.type = conn->type;
865 ci.out = conn->out;
866 ci.state = conn->state;
867 ci.link_mode = conn->link_mode;
868 }
869 hci_dev_unlock_bh(hdev);
870
871 if (!conn)
872 return -ENOENT;
873
874 return copy_to_user(ptr, &ci, sizeof(ci)) ? -EFAULT : 0;
875 }
876
877 int hci_get_auth_info(struct hci_dev *hdev, void __user *arg)
878 {
879 struct hci_auth_info_req req;
880 struct hci_conn *conn;
881
882 if (copy_from_user(&req, arg, sizeof(req)))
883 return -EFAULT;
884
885 hci_dev_lock_bh(hdev);
886 conn = hci_conn_hash_lookup_ba(hdev, ACL_LINK, &req.bdaddr);
887 if (conn)
888 req.type = conn->auth_type;
889 hci_dev_unlock_bh(hdev);
890
891 if (!conn)
892 return -ENOENT;
893
894 return copy_to_user(arg, &req, sizeof(req)) ? -EFAULT : 0;
895 }
Linux 2.6 ibm-acpi/thinkpad-acpi driver git tree