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27#include <linux/export.h>
28
29#include <net/bluetooth/bluetooth.h>
30#include <net/bluetooth/hci_core.h>
31#include <net/bluetooth/a2mp.h>
32#include <net/bluetooth/smp.h>
33
34static void hci_le_create_connection(struct hci_conn *conn)
35{
36 struct hci_dev *hdev = conn->hdev;
37 struct hci_cp_le_create_conn cp;
38
39 conn->state = BT_CONNECT;
40 conn->out = true;
41 conn->link_mode |= HCI_LM_MASTER;
42 conn->sec_level = BT_SECURITY_LOW;
43
44 memset(&cp, 0, sizeof(cp));
45 cp.scan_interval = __constant_cpu_to_le16(0x0060);
46 cp.scan_window = __constant_cpu_to_le16(0x0030);
47 bacpy(&cp.peer_addr, &conn->dst);
48 cp.peer_addr_type = conn->dst_type;
49 cp.conn_interval_min = __constant_cpu_to_le16(0x0028);
50 cp.conn_interval_max = __constant_cpu_to_le16(0x0038);
51 cp.supervision_timeout = __constant_cpu_to_le16(0x002a);
52 cp.min_ce_len = __constant_cpu_to_le16(0x0000);
53 cp.max_ce_len = __constant_cpu_to_le16(0x0000);
54
55 hci_send_cmd(hdev, HCI_OP_LE_CREATE_CONN, sizeof(cp), &cp);
56}
57
58static void hci_le_create_connection_cancel(struct hci_conn *conn)
59{
60 hci_send_cmd(conn->hdev, HCI_OP_LE_CREATE_CONN_CANCEL, 0, NULL);
61}
62
63static void hci_acl_create_connection(struct hci_conn *conn)
64{
65 struct hci_dev *hdev = conn->hdev;
66 struct inquiry_entry *ie;
67 struct hci_cp_create_conn cp;
68
69 BT_DBG("hcon %p", conn);
70
71 conn->state = BT_CONNECT;
72 conn->out = true;
73
74 conn->link_mode = HCI_LM_MASTER;
75
76 conn->attempt++;
77
78 conn->link_policy = hdev->link_policy;
79
80 memset(&cp, 0, sizeof(cp));
81 bacpy(&cp.bdaddr, &conn->dst);
82 cp.pscan_rep_mode = 0x02;
83
84 ie = hci_inquiry_cache_lookup(hdev, &conn->dst);
85 if (ie) {
86 if (inquiry_entry_age(ie) <= INQUIRY_ENTRY_AGE_MAX) {
87 cp.pscan_rep_mode = ie->data.pscan_rep_mode;
88 cp.pscan_mode = ie->data.pscan_mode;
89 cp.clock_offset = ie->data.clock_offset |
90 __constant_cpu_to_le16(0x8000);
91 }
92
93 memcpy(conn->dev_class, ie->data.dev_class, 3);
94 if (ie->data.ssp_mode > 0)
95 set_bit(HCI_CONN_SSP_ENABLED, &conn->flags);
96 }
97
98 cp.pkt_type = cpu_to_le16(conn->pkt_type);
99 if (lmp_rswitch_capable(hdev) && !(hdev->link_mode & HCI_LM_MASTER))
100 cp.role_switch = 0x01;
101 else
102 cp.role_switch = 0x00;
103
104 hci_send_cmd(hdev, HCI_OP_CREATE_CONN, sizeof(cp), &cp);
105}
106
107static void hci_acl_create_connection_cancel(struct hci_conn *conn)
108{
109 struct hci_cp_create_conn_cancel cp;
110
111 BT_DBG("hcon %p", conn);
112
113 if (conn->hdev->hci_ver < BLUETOOTH_VER_1_2)
114 return;
115
116 bacpy(&cp.bdaddr, &conn->dst);
117 hci_send_cmd(conn->hdev, HCI_OP_CREATE_CONN_CANCEL, sizeof(cp), &cp);
118}
119
120void hci_acl_disconn(struct hci_conn *conn, __u8 reason)
121{
122 struct hci_cp_disconnect cp;
123
124 BT_DBG("hcon %p", conn);
125
126 conn->state = BT_DISCONN;
127
128 cp.handle = cpu_to_le16(conn->handle);
129 cp.reason = reason;
130 hci_send_cmd(conn->hdev, HCI_OP_DISCONNECT, sizeof(cp), &cp);
131}
132
133static void hci_add_sco(struct hci_conn *conn, __u16 handle)
134{
135 struct hci_dev *hdev = conn->hdev;
136 struct hci_cp_add_sco cp;
137
138 BT_DBG("hcon %p", conn);
139
140 conn->state = BT_CONNECT;
141 conn->out = true;
142
143 conn->attempt++;
144
145 cp.handle = cpu_to_le16(handle);
146 cp.pkt_type = cpu_to_le16(conn->pkt_type);
147
148 hci_send_cmd(hdev, HCI_OP_ADD_SCO, sizeof(cp), &cp);
149}
150
151void hci_setup_sync(struct hci_conn *conn, __u16 handle)
152{
153 struct hci_dev *hdev = conn->hdev;
154 struct hci_cp_setup_sync_conn cp;
155
156 BT_DBG("hcon %p", conn);
157
158 conn->state = BT_CONNECT;
159 conn->out = true;
160
161 conn->attempt++;
162
163 cp.handle = cpu_to_le16(handle);
164 cp.pkt_type = cpu_to_le16(conn->pkt_type);
165
166 cp.tx_bandwidth = __constant_cpu_to_le32(0x00001f40);
167 cp.rx_bandwidth = __constant_cpu_to_le32(0x00001f40);
168 cp.max_latency = __constant_cpu_to_le16(0xffff);
169 cp.voice_setting = cpu_to_le16(hdev->voice_setting);
170 cp.retrans_effort = 0xff;
171
172 hci_send_cmd(hdev, HCI_OP_SETUP_SYNC_CONN, sizeof(cp), &cp);
173}
174
175void hci_le_conn_update(struct hci_conn *conn, u16 min, u16 max,
176 u16 latency, u16 to_multiplier)
177{
178 struct hci_cp_le_conn_update cp;
179 struct hci_dev *hdev = conn->hdev;
180
181 memset(&cp, 0, sizeof(cp));
182
183 cp.handle = cpu_to_le16(conn->handle);
184 cp.conn_interval_min = cpu_to_le16(min);
185 cp.conn_interval_max = cpu_to_le16(max);
186 cp.conn_latency = cpu_to_le16(latency);
187 cp.supervision_timeout = cpu_to_le16(to_multiplier);
188 cp.min_ce_len = __constant_cpu_to_le16(0x0001);
189 cp.max_ce_len = __constant_cpu_to_le16(0x0001);
190
191 hci_send_cmd(hdev, HCI_OP_LE_CONN_UPDATE, sizeof(cp), &cp);
192}
193
194void hci_le_start_enc(struct hci_conn *conn, __le16 ediv, __u8 rand[8],
195 __u8 ltk[16])
196{
197 struct hci_dev *hdev = conn->hdev;
198 struct hci_cp_le_start_enc cp;
199
200 BT_DBG("hcon %p", conn);
201
202 memset(&cp, 0, sizeof(cp));
203
204 cp.handle = cpu_to_le16(conn->handle);
205 memcpy(cp.ltk, ltk, sizeof(cp.ltk));
206 cp.ediv = ediv;
207 memcpy(cp.rand, rand, sizeof(cp.rand));
208
209 hci_send_cmd(hdev, HCI_OP_LE_START_ENC, sizeof(cp), &cp);
210}
211
212
213void hci_sco_setup(struct hci_conn *conn, __u8 status)
214{
215 struct hci_conn *sco = conn->link;
216
217 if (!sco)
218 return;
219
220 BT_DBG("hcon %p", conn);
221
222 if (!status) {
223 if (lmp_esco_capable(conn->hdev))
224 hci_setup_sync(sco, conn->handle);
225 else
226 hci_add_sco(sco, conn->handle);
227 } else {
228 hci_proto_connect_cfm(sco, status);
229 hci_conn_del(sco);
230 }
231}
232
233static void hci_conn_timeout(struct work_struct *work)
234{
235 struct hci_conn *conn = container_of(work, struct hci_conn,
236 disc_work.work);
237 __u8 reason;
238
239 BT_DBG("hcon %p state %s", conn, state_to_string(conn->state));
240
241 if (atomic_read(&conn->refcnt))
242 return;
243
244 switch (conn->state) {
245 case BT_CONNECT:
246 case BT_CONNECT2:
247 if (conn->out) {
248 if (conn->type == ACL_LINK)
249 hci_acl_create_connection_cancel(conn);
250 else if (conn->type == LE_LINK)
251 hci_le_create_connection_cancel(conn);
252 }
253 break;
254 case BT_CONFIG:
255 case BT_CONNECTED:
256 reason = hci_proto_disconn_ind(conn);
257 hci_acl_disconn(conn, reason);
258 break;
259 default:
260 conn->state = BT_CLOSED;
261 break;
262 }
263}
264
265
266static void hci_conn_enter_sniff_mode(struct hci_conn *conn)
267{
268 struct hci_dev *hdev = conn->hdev;
269
270 BT_DBG("hcon %p mode %d", conn, conn->mode);
271
272 if (test_bit(HCI_RAW, &hdev->flags))
273 return;
274
275 if (!lmp_sniff_capable(hdev) || !lmp_sniff_capable(conn))
276 return;
277
278 if (conn->mode != HCI_CM_ACTIVE || !(conn->link_policy & HCI_LP_SNIFF))
279 return;
280
281 if (lmp_sniffsubr_capable(hdev) && lmp_sniffsubr_capable(conn)) {
282 struct hci_cp_sniff_subrate cp;
283 cp.handle = cpu_to_le16(conn->handle);
284 cp.max_latency = __constant_cpu_to_le16(0);
285 cp.min_remote_timeout = __constant_cpu_to_le16(0);
286 cp.min_local_timeout = __constant_cpu_to_le16(0);
287 hci_send_cmd(hdev, HCI_OP_SNIFF_SUBRATE, sizeof(cp), &cp);
288 }
289
290 if (!test_and_set_bit(HCI_CONN_MODE_CHANGE_PEND, &conn->flags)) {
291 struct hci_cp_sniff_mode cp;
292 cp.handle = cpu_to_le16(conn->handle);
293 cp.max_interval = cpu_to_le16(hdev->sniff_max_interval);
294 cp.min_interval = cpu_to_le16(hdev->sniff_min_interval);
295 cp.attempt = __constant_cpu_to_le16(4);
296 cp.timeout = __constant_cpu_to_le16(1);
297 hci_send_cmd(hdev, HCI_OP_SNIFF_MODE, sizeof(cp), &cp);
298 }
299}
300
301static void hci_conn_idle(unsigned long arg)
302{
303 struct hci_conn *conn = (void *) arg;
304
305 BT_DBG("hcon %p mode %d", conn, conn->mode);
306
307 hci_conn_enter_sniff_mode(conn);
308}
309
310static void hci_conn_auto_accept(unsigned long arg)
311{
312 struct hci_conn *conn = (void *) arg;
313 struct hci_dev *hdev = conn->hdev;
314
315 hci_send_cmd(hdev, HCI_OP_USER_CONFIRM_REPLY, sizeof(conn->dst),
316 &conn->dst);
317}
318
319struct hci_conn *hci_conn_add(struct hci_dev *hdev, int type, bdaddr_t *dst)
320{
321 struct hci_conn *conn;
322
323 BT_DBG("%s dst %s", hdev->name, batostr(dst));
324
325 conn = kzalloc(sizeof(struct hci_conn), GFP_KERNEL);
326 if (!conn)
327 return NULL;
328
329 bacpy(&conn->dst, dst);
330 conn->hdev = hdev;
331 conn->type = type;
332 conn->mode = HCI_CM_ACTIVE;
333 conn->state = BT_OPEN;
334 conn->auth_type = HCI_AT_GENERAL_BONDING;
335 conn->io_capability = hdev->io_capability;
336 conn->remote_auth = 0xff;
337 conn->key_type = 0xff;
338
339 set_bit(HCI_CONN_POWER_SAVE, &conn->flags);
340 conn->disc_timeout = HCI_DISCONN_TIMEOUT;
341
342 switch (type) {
343 case ACL_LINK:
344 conn->pkt_type = hdev->pkt_type & ACL_PTYPE_MASK;
345 break;
346 case SCO_LINK:
347 if (lmp_esco_capable(hdev))
348 conn->pkt_type = (hdev->esco_type & SCO_ESCO_MASK) |
349 (hdev->esco_type & EDR_ESCO_MASK);
350 else
351 conn->pkt_type = hdev->pkt_type & SCO_PTYPE_MASK;
352 break;
353 case ESCO_LINK:
354 conn->pkt_type = hdev->esco_type & ~EDR_ESCO_MASK;
355 break;
356 }
357
358 skb_queue_head_init(&conn->data_q);
359
360 INIT_LIST_HEAD(&conn->chan_list);
361
362 INIT_DELAYED_WORK(&conn->disc_work, hci_conn_timeout);
363 setup_timer(&conn->idle_timer, hci_conn_idle, (unsigned long)conn);
364 setup_timer(&conn->auto_accept_timer, hci_conn_auto_accept,
365 (unsigned long) conn);
366
367 atomic_set(&conn->refcnt, 0);
368
369 hci_dev_hold(hdev);
370
371 hci_conn_hash_add(hdev, conn);
372 if (hdev->notify)
373 hdev->notify(hdev, HCI_NOTIFY_CONN_ADD);
374
375 atomic_set(&conn->devref, 0);
376
377 hci_conn_init_sysfs(conn);
378
379 return conn;
380}
381
382int hci_conn_del(struct hci_conn *conn)
383{
384 struct hci_dev *hdev = conn->hdev;
385
386 BT_DBG("%s hcon %p handle %d", hdev->name, conn, conn->handle);
387
388 del_timer(&conn->idle_timer);
389
390 cancel_delayed_work_sync(&conn->disc_work);
391
392 del_timer(&conn->auto_accept_timer);
393
394 if (conn->type == ACL_LINK) {
395 struct hci_conn *sco = conn->link;
396 if (sco)
397 sco->link = NULL;
398
399
400 hdev->acl_cnt += conn->sent;
401 } else if (conn->type == LE_LINK) {
402 if (hdev->le_pkts)
403 hdev->le_cnt += conn->sent;
404 else
405 hdev->acl_cnt += conn->sent;
406 } else {
407 struct hci_conn *acl = conn->link;
408 if (acl) {
409 acl->link = NULL;
410 hci_conn_put(acl);
411 }
412 }
413
414 hci_chan_list_flush(conn);
415
416 if (conn->amp_mgr)
417 amp_mgr_put(conn->amp_mgr);
418
419 hci_conn_hash_del(hdev, conn);
420 if (hdev->notify)
421 hdev->notify(hdev, HCI_NOTIFY_CONN_DEL);
422
423 skb_queue_purge(&conn->data_q);
424
425 hci_conn_put_device(conn);
426
427 hci_dev_put(hdev);
428
429 if (conn->handle == 0)
430 kfree(conn);
431
432 return 0;
433}
434
435struct hci_dev *hci_get_route(bdaddr_t *dst, bdaddr_t *src)
436{
437 int use_src = bacmp(src, BDADDR_ANY);
438 struct hci_dev *hdev = NULL, *d;
439
440 BT_DBG("%s -> %s", batostr(src), batostr(dst));
441
442 read_lock(&hci_dev_list_lock);
443
444 list_for_each_entry(d, &hci_dev_list, list) {
445 if (!test_bit(HCI_UP, &d->flags) ||
446 test_bit(HCI_RAW, &d->flags) ||
447 d->dev_type != HCI_BREDR)
448 continue;
449
450
451
452
453
454
455 if (use_src) {
456 if (!bacmp(&d->bdaddr, src)) {
457 hdev = d; break;
458 }
459 } else {
460 if (bacmp(&d->bdaddr, dst)) {
461 hdev = d; break;
462 }
463 }
464 }
465
466 if (hdev)
467 hdev = hci_dev_hold(hdev);
468
469 read_unlock(&hci_dev_list_lock);
470 return hdev;
471}
472EXPORT_SYMBOL(hci_get_route);
473
474static struct hci_conn *hci_connect_le(struct hci_dev *hdev, bdaddr_t *dst,
475 u8 dst_type, u8 sec_level, u8 auth_type)
476{
477 struct hci_conn *le;
478
479 le = hci_conn_hash_lookup_ba(hdev, LE_LINK, dst);
480 if (!le) {
481 le = hci_conn_hash_lookup_state(hdev, LE_LINK, BT_CONNECT);
482 if (le)
483 return ERR_PTR(-EBUSY);
484
485 le = hci_conn_add(hdev, LE_LINK, dst);
486 if (!le)
487 return ERR_PTR(-ENOMEM);
488
489 le->dst_type = bdaddr_to_le(dst_type);
490 hci_le_create_connection(le);
491 }
492
493 le->pending_sec_level = sec_level;
494 le->auth_type = auth_type;
495
496 hci_conn_hold(le);
497
498 return le;
499}
500
501static struct hci_conn *hci_connect_acl(struct hci_dev *hdev, bdaddr_t *dst,
502 u8 sec_level, u8 auth_type)
503{
504 struct hci_conn *acl;
505
506 acl = hci_conn_hash_lookup_ba(hdev, ACL_LINK, dst);
507 if (!acl) {
508 acl = hci_conn_add(hdev, ACL_LINK, dst);
509 if (!acl)
510 return ERR_PTR(-ENOMEM);
511 }
512
513 hci_conn_hold(acl);
514
515 if (acl->state == BT_OPEN || acl->state == BT_CLOSED) {
516 acl->sec_level = BT_SECURITY_LOW;
517 acl->pending_sec_level = sec_level;
518 acl->auth_type = auth_type;
519 hci_acl_create_connection(acl);
520 }
521
522 return acl;
523}
524
525static struct hci_conn *hci_connect_sco(struct hci_dev *hdev, int type,
526 bdaddr_t *dst, u8 sec_level, u8 auth_type)
527{
528 struct hci_conn *acl;
529 struct hci_conn *sco;
530
531 acl = hci_connect_acl(hdev, dst, sec_level, auth_type);
532 if (IS_ERR(acl))
533 return acl;
534
535 sco = hci_conn_hash_lookup_ba(hdev, type, dst);
536 if (!sco) {
537 sco = hci_conn_add(hdev, type, dst);
538 if (!sco) {
539 hci_conn_put(acl);
540 return ERR_PTR(-ENOMEM);
541 }
542 }
543
544 acl->link = sco;
545 sco->link = acl;
546
547 hci_conn_hold(sco);
548
549 if (acl->state == BT_CONNECTED &&
550 (sco->state == BT_OPEN || sco->state == BT_CLOSED)) {
551 set_bit(HCI_CONN_POWER_SAVE, &acl->flags);
552 hci_conn_enter_active_mode(acl, BT_POWER_FORCE_ACTIVE_ON);
553
554 if (test_bit(HCI_CONN_MODE_CHANGE_PEND, &acl->flags)) {
555
556 set_bit(HCI_CONN_SCO_SETUP_PEND, &acl->flags);
557 return sco;
558 }
559
560 hci_sco_setup(acl, 0x00);
561 }
562
563 return sco;
564}
565
566
567struct hci_conn *hci_connect(struct hci_dev *hdev, int type, bdaddr_t *dst,
568 __u8 dst_type, __u8 sec_level, __u8 auth_type)
569{
570 BT_DBG("%s dst %s type 0x%x", hdev->name, batostr(dst), type);
571
572 switch (type) {
573 case LE_LINK:
574 return hci_connect_le(hdev, dst, dst_type, sec_level, auth_type);
575 case ACL_LINK:
576 return hci_connect_acl(hdev, dst, sec_level, auth_type);
577 case SCO_LINK:
578 case ESCO_LINK:
579 return hci_connect_sco(hdev, type, dst, sec_level, auth_type);
580 }
581
582 return ERR_PTR(-EINVAL);
583}
584
585
586int hci_conn_check_link_mode(struct hci_conn *conn)
587{
588 BT_DBG("hcon %p", conn);
589
590 if (hci_conn_ssp_enabled(conn) && !(conn->link_mode & HCI_LM_ENCRYPT))
591 return 0;
592
593 return 1;
594}
595
596
597static int hci_conn_auth(struct hci_conn *conn, __u8 sec_level, __u8 auth_type)
598{
599 BT_DBG("hcon %p", conn);
600
601 if (conn->pending_sec_level > sec_level)
602 sec_level = conn->pending_sec_level;
603
604 if (sec_level > conn->sec_level)
605 conn->pending_sec_level = sec_level;
606 else if (conn->link_mode & HCI_LM_AUTH)
607 return 1;
608
609
610 auth_type |= (conn->auth_type & 0x01);
611
612 conn->auth_type = auth_type;
613
614 if (!test_and_set_bit(HCI_CONN_AUTH_PEND, &conn->flags)) {
615 struct hci_cp_auth_requested cp;
616
617
618 set_bit(HCI_CONN_ENCRYPT_PEND, &conn->flags);
619
620 cp.handle = cpu_to_le16(conn->handle);
621 hci_send_cmd(conn->hdev, HCI_OP_AUTH_REQUESTED,
622 sizeof(cp), &cp);
623 if (conn->key_type != 0xff)
624 set_bit(HCI_CONN_REAUTH_PEND, &conn->flags);
625 }
626
627 return 0;
628}
629
630
631static void hci_conn_encrypt(struct hci_conn *conn)
632{
633 BT_DBG("hcon %p", conn);
634
635 if (!test_and_set_bit(HCI_CONN_ENCRYPT_PEND, &conn->flags)) {
636 struct hci_cp_set_conn_encrypt cp;
637 cp.handle = cpu_to_le16(conn->handle);
638 cp.encrypt = 0x01;
639 hci_send_cmd(conn->hdev, HCI_OP_SET_CONN_ENCRYPT, sizeof(cp),
640 &cp);
641 }
642}
643
644
645int hci_conn_security(struct hci_conn *conn, __u8 sec_level, __u8 auth_type)
646{
647 BT_DBG("hcon %p", conn);
648
649 if (conn->type == LE_LINK)
650 return smp_conn_security(conn, sec_level);
651
652
653 if (sec_level == BT_SECURITY_SDP)
654 return 1;
655
656
657
658 if (sec_level == BT_SECURITY_LOW && !hci_conn_ssp_enabled(conn))
659 return 1;
660
661
662 if (!(conn->link_mode & HCI_LM_AUTH))
663 goto auth;
664
665
666
667 if (conn->key_type == HCI_LK_AUTH_COMBINATION)
668 goto encrypt;
669
670
671
672 if (conn->key_type == HCI_LK_UNAUTH_COMBINATION &&
673 (sec_level == BT_SECURITY_MEDIUM || sec_level == BT_SECURITY_LOW))
674 goto encrypt;
675
676
677
678
679
680 if (conn->key_type == HCI_LK_COMBINATION &&
681 (sec_level != BT_SECURITY_HIGH || conn->pin_length == 16))
682 goto encrypt;
683
684auth:
685 if (test_bit(HCI_CONN_ENCRYPT_PEND, &conn->flags))
686 return 0;
687
688 if (!hci_conn_auth(conn, sec_level, auth_type))
689 return 0;
690
691encrypt:
692 if (conn->link_mode & HCI_LM_ENCRYPT)
693 return 1;
694
695 hci_conn_encrypt(conn);
696 return 0;
697}
698EXPORT_SYMBOL(hci_conn_security);
699
700
701int hci_conn_check_secure(struct hci_conn *conn, __u8 sec_level)
702{
703 BT_DBG("hcon %p", conn);
704
705 if (sec_level != BT_SECURITY_HIGH)
706 return 1;
707
708 if (conn->sec_level == BT_SECURITY_HIGH)
709 return 1;
710
711 return 0;
712}
713EXPORT_SYMBOL(hci_conn_check_secure);
714
715
716int hci_conn_change_link_key(struct hci_conn *conn)
717{
718 BT_DBG("hcon %p", conn);
719
720 if (!test_and_set_bit(HCI_CONN_AUTH_PEND, &conn->flags)) {
721 struct hci_cp_change_conn_link_key cp;
722 cp.handle = cpu_to_le16(conn->handle);
723 hci_send_cmd(conn->hdev, HCI_OP_CHANGE_CONN_LINK_KEY,
724 sizeof(cp), &cp);
725 }
726
727 return 0;
728}
729
730
731int hci_conn_switch_role(struct hci_conn *conn, __u8 role)
732{
733 BT_DBG("hcon %p", conn);
734
735 if (!role && conn->link_mode & HCI_LM_MASTER)
736 return 1;
737
738 if (!test_and_set_bit(HCI_CONN_RSWITCH_PEND, &conn->flags)) {
739 struct hci_cp_switch_role cp;
740 bacpy(&cp.bdaddr, &conn->dst);
741 cp.role = role;
742 hci_send_cmd(conn->hdev, HCI_OP_SWITCH_ROLE, sizeof(cp), &cp);
743 }
744
745 return 0;
746}
747EXPORT_SYMBOL(hci_conn_switch_role);
748
749
750void hci_conn_enter_active_mode(struct hci_conn *conn, __u8 force_active)
751{
752 struct hci_dev *hdev = conn->hdev;
753
754 BT_DBG("hcon %p mode %d", conn, conn->mode);
755
756 if (test_bit(HCI_RAW, &hdev->flags))
757 return;
758
759 if (conn->mode != HCI_CM_SNIFF)
760 goto timer;
761
762 if (!test_bit(HCI_CONN_POWER_SAVE, &conn->flags) && !force_active)
763 goto timer;
764
765 if (!test_and_set_bit(HCI_CONN_MODE_CHANGE_PEND, &conn->flags)) {
766 struct hci_cp_exit_sniff_mode cp;
767 cp.handle = cpu_to_le16(conn->handle);
768 hci_send_cmd(hdev, HCI_OP_EXIT_SNIFF_MODE, sizeof(cp), &cp);
769 }
770
771timer:
772 if (hdev->idle_timeout > 0)
773 mod_timer(&conn->idle_timer,
774 jiffies + msecs_to_jiffies(hdev->idle_timeout));
775}
776
777
778void hci_conn_hash_flush(struct hci_dev *hdev)
779{
780 struct hci_conn_hash *h = &hdev->conn_hash;
781 struct hci_conn *c, *n;
782
783 BT_DBG("hdev %s", hdev->name);
784
785 list_for_each_entry_safe(c, n, &h->list, list) {
786 c->state = BT_CLOSED;
787
788 hci_proto_disconn_cfm(c, HCI_ERROR_LOCAL_HOST_TERM);
789 hci_conn_del(c);
790 }
791}
792
793
794void hci_conn_check_pending(struct hci_dev *hdev)
795{
796 struct hci_conn *conn;
797
798 BT_DBG("hdev %s", hdev->name);
799
800 hci_dev_lock(hdev);
801
802 conn = hci_conn_hash_lookup_state(hdev, ACL_LINK, BT_CONNECT2);
803 if (conn)
804 hci_acl_create_connection(conn);
805
806 hci_dev_unlock(hdev);
807}
808
809void hci_conn_hold_device(struct hci_conn *conn)
810{
811 atomic_inc(&conn->devref);
812}
813EXPORT_SYMBOL(hci_conn_hold_device);
814
815void hci_conn_put_device(struct hci_conn *conn)
816{
817 if (atomic_dec_and_test(&conn->devref))
818 hci_conn_del_sysfs(conn);
819}
820EXPORT_SYMBOL(hci_conn_put_device);
821
822int hci_get_conn_list(void __user *arg)
823{
824 struct hci_conn *c;
825 struct hci_conn_list_req req, *cl;
826 struct hci_conn_info *ci;
827 struct hci_dev *hdev;
828 int n = 0, size, err;
829
830 if (copy_from_user(&req, arg, sizeof(req)))
831 return -EFAULT;
832
833 if (!req.conn_num || req.conn_num > (PAGE_SIZE * 2) / sizeof(*ci))
834 return -EINVAL;
835
836 size = sizeof(req) + req.conn_num * sizeof(*ci);
837
838 cl = kmalloc(size, GFP_KERNEL);
839 if (!cl)
840 return -ENOMEM;
841
842 hdev = hci_dev_get(req.dev_id);
843 if (!hdev) {
844 kfree(cl);
845 return -ENODEV;
846 }
847
848 ci = cl->conn_info;
849
850 hci_dev_lock(hdev);
851 list_for_each_entry(c, &hdev->conn_hash.list, list) {
852 bacpy(&(ci + n)->bdaddr, &c->dst);
853 (ci + n)->handle = c->handle;
854 (ci + n)->type = c->type;
855 (ci + n)->out = c->out;
856 (ci + n)->state = c->state;
857 (ci + n)->link_mode = c->link_mode;
858 if (++n >= req.conn_num)
859 break;
860 }
861 hci_dev_unlock(hdev);
862
863 cl->dev_id = hdev->id;
864 cl->conn_num = n;
865 size = sizeof(req) + n * sizeof(*ci);
866
867 hci_dev_put(hdev);
868
869 err = copy_to_user(arg, cl, size);
870 kfree(cl);
871
872 return err ? -EFAULT : 0;
873}
874
875int hci_get_conn_info(struct hci_dev *hdev, void __user *arg)
876{
877 struct hci_conn_info_req req;
878 struct hci_conn_info ci;
879 struct hci_conn *conn;
880 char __user *ptr = arg + sizeof(req);
881
882 if (copy_from_user(&req, arg, sizeof(req)))
883 return -EFAULT;
884
885 hci_dev_lock(hdev);
886 conn = hci_conn_hash_lookup_ba(hdev, req.type, &req.bdaddr);
887 if (conn) {
888 bacpy(&ci.bdaddr, &conn->dst);
889 ci.handle = conn->handle;
890 ci.type = conn->type;
891 ci.out = conn->out;
892 ci.state = conn->state;
893 ci.link_mode = conn->link_mode;
894 }
895 hci_dev_unlock(hdev);
896
897 if (!conn)
898 return -ENOENT;
899
900 return copy_to_user(ptr, &ci, sizeof(ci)) ? -EFAULT : 0;
901}
902
903int hci_get_auth_info(struct hci_dev *hdev, void __user *arg)
904{
905 struct hci_auth_info_req req;
906 struct hci_conn *conn;
907
908 if (copy_from_user(&req, arg, sizeof(req)))
909 return -EFAULT;
910
911 hci_dev_lock(hdev);
912 conn = hci_conn_hash_lookup_ba(hdev, ACL_LINK, &req.bdaddr);
913 if (conn)
914 req.type = conn->auth_type;
915 hci_dev_unlock(hdev);
916
917 if (!conn)
918 return -ENOENT;
919
920 return copy_to_user(arg, &req, sizeof(req)) ? -EFAULT : 0;
921}
922
923struct hci_chan *hci_chan_create(struct hci_conn *conn)
924{
925 struct hci_dev *hdev = conn->hdev;
926 struct hci_chan *chan;
927
928 BT_DBG("%s hcon %p", hdev->name, conn);
929
930 chan = kzalloc(sizeof(struct hci_chan), GFP_KERNEL);
931 if (!chan)
932 return NULL;
933
934 chan->conn = conn;
935 skb_queue_head_init(&chan->data_q);
936
937 list_add_rcu(&chan->list, &conn->chan_list);
938
939 return chan;
940}
941
942void hci_chan_del(struct hci_chan *chan)
943{
944 struct hci_conn *conn = chan->conn;
945 struct hci_dev *hdev = conn->hdev;
946
947 BT_DBG("%s hcon %p chan %p", hdev->name, conn, chan);
948
949 list_del_rcu(&chan->list);
950
951 synchronize_rcu();
952
953 skb_queue_purge(&chan->data_q);
954 kfree(chan);
955}
956
957void hci_chan_list_flush(struct hci_conn *conn)
958{
959 struct hci_chan *chan, *n;
960
961 BT_DBG("hcon %p", conn);
962
963 list_for_each_entry_safe(chan, n, &conn->chan_list, list)
964 hci_chan_del(chan);
965}
966
