2 BlueZ - Bluetooth protocol stack for Linux
3 Copyright (c) 2000-2001, 2010, Code Aurora Forum. All rights reserved.
5 Written 2000,2001 by Maxim Krasnyansky <maxk@qualcomm.com>
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;
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.
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.
25 /* Bluetooth HCI connection handling. */
27 #include <linux/export.h>
28 #include <linux/debugfs.h>
30 #include <net/bluetooth/bluetooth.h>
31 #include <net/bluetooth/hci_core.h>
32 #include <net/bluetooth/l2cap.h>
34 #include "hci_request.h"
44 static const struct sco_param esco_param_cvsd
[] = {
45 { EDR_ESCO_MASK
& ~ESCO_2EV3
, 0x000a, 0x01 }, /* S3 */
46 { EDR_ESCO_MASK
& ~ESCO_2EV3
, 0x0007, 0x01 }, /* S2 */
47 { EDR_ESCO_MASK
| ESCO_EV3
, 0x0007, 0x01 }, /* S1 */
48 { EDR_ESCO_MASK
| ESCO_HV3
, 0xffff, 0x01 }, /* D1 */
49 { EDR_ESCO_MASK
| ESCO_HV1
, 0xffff, 0x01 }, /* D0 */
52 static const struct sco_param sco_param_cvsd
[] = {
53 { EDR_ESCO_MASK
| ESCO_HV3
, 0xffff, 0xff }, /* D1 */
54 { EDR_ESCO_MASK
| ESCO_HV1
, 0xffff, 0xff }, /* D0 */
57 static const struct sco_param esco_param_msbc
[] = {
58 { EDR_ESCO_MASK
& ~ESCO_2EV3
, 0x000d, 0x02 }, /* T2 */
59 { EDR_ESCO_MASK
| ESCO_EV3
, 0x0008, 0x02 }, /* T1 */
62 /* This function requires the caller holds hdev->lock */
63 static void hci_connect_le_scan_cleanup(struct hci_conn
*conn
)
65 struct hci_conn_params
*params
;
66 struct hci_dev
*hdev
= conn
->hdev
;
72 bdaddr_type
= conn
->dst_type
;
74 /* Check if we need to convert to identity address */
75 irk
= hci_get_irk(hdev
, bdaddr
, bdaddr_type
);
77 bdaddr
= &irk
->bdaddr
;
78 bdaddr_type
= irk
->addr_type
;
81 params
= hci_pend_le_action_lookup(&hdev
->pend_le_conns
, bdaddr
,
83 if (!params
|| !params
->explicit_connect
)
86 /* The connection attempt was doing scan for new RPA, and is
87 * in scan phase. If params are not associated with any other
88 * autoconnect action, remove them completely. If they are, just unmark
89 * them as waiting for connection, by clearing explicit_connect field.
91 params
->explicit_connect
= false;
93 list_del_init(¶ms
->action
);
95 switch (params
->auto_connect
) {
96 case HCI_AUTO_CONN_EXPLICIT
:
97 hci_conn_params_del(hdev
, bdaddr
, bdaddr_type
);
98 /* return instead of break to avoid duplicate scan update */
100 case HCI_AUTO_CONN_DIRECT
:
101 case HCI_AUTO_CONN_ALWAYS
:
102 list_add(¶ms
->action
, &hdev
->pend_le_conns
);
104 case HCI_AUTO_CONN_REPORT
:
105 list_add(¶ms
->action
, &hdev
->pend_le_reports
);
111 hci_update_background_scan(hdev
);
114 static void hci_conn_cleanup(struct hci_conn
*conn
)
116 struct hci_dev
*hdev
= conn
->hdev
;
118 if (test_bit(HCI_CONN_PARAM_REMOVAL_PEND
, &conn
->flags
))
119 hci_conn_params_del(conn
->hdev
, &conn
->dst
, conn
->dst_type
);
121 hci_chan_list_flush(conn
);
123 hci_conn_hash_del(hdev
, conn
);
126 hdev
->notify(hdev
, HCI_NOTIFY_CONN_DEL
);
128 hci_conn_del_sysfs(conn
);
130 debugfs_remove_recursive(conn
->debugfs
);
137 static void le_scan_cleanup(struct work_struct
*work
)
139 struct hci_conn
*conn
= container_of(work
, struct hci_conn
,
141 struct hci_dev
*hdev
= conn
->hdev
;
142 struct hci_conn
*c
= NULL
;
144 BT_DBG("%s hcon %p", hdev
->name
, conn
);
148 /* Check that the hci_conn is still around */
150 list_for_each_entry_rcu(c
, &hdev
->conn_hash
.list
, list
) {
157 hci_connect_le_scan_cleanup(conn
);
158 hci_conn_cleanup(conn
);
161 hci_dev_unlock(hdev
);
166 static void hci_connect_le_scan_remove(struct hci_conn
*conn
)
168 BT_DBG("%s hcon %p", conn
->hdev
->name
, conn
);
170 /* We can't call hci_conn_del/hci_conn_cleanup here since that
171 * could deadlock with another hci_conn_del() call that's holding
172 * hci_dev_lock and doing cancel_delayed_work_sync(&conn->disc_work).
173 * Instead, grab temporary extra references to the hci_dev and
174 * hci_conn and perform the necessary cleanup in a separate work
178 hci_dev_hold(conn
->hdev
);
181 /* Even though we hold a reference to the hdev, many other
182 * things might get cleaned up meanwhile, including the hdev's
183 * own workqueue, so we can't use that for scheduling.
185 schedule_work(&conn
->le_scan_cleanup
);
188 static void hci_acl_create_connection(struct hci_conn
*conn
)
190 struct hci_dev
*hdev
= conn
->hdev
;
191 struct inquiry_entry
*ie
;
192 struct hci_cp_create_conn cp
;
194 BT_DBG("hcon %p", conn
);
196 conn
->state
= BT_CONNECT
;
198 conn
->role
= HCI_ROLE_MASTER
;
202 conn
->link_policy
= hdev
->link_policy
;
204 memset(&cp
, 0, sizeof(cp
));
205 bacpy(&cp
.bdaddr
, &conn
->dst
);
206 cp
.pscan_rep_mode
= 0x02;
208 ie
= hci_inquiry_cache_lookup(hdev
, &conn
->dst
);
210 if (inquiry_entry_age(ie
) <= INQUIRY_ENTRY_AGE_MAX
) {
211 cp
.pscan_rep_mode
= ie
->data
.pscan_rep_mode
;
212 cp
.pscan_mode
= ie
->data
.pscan_mode
;
213 cp
.clock_offset
= ie
->data
.clock_offset
|
217 memcpy(conn
->dev_class
, ie
->data
.dev_class
, 3);
218 if (ie
->data
.ssp_mode
> 0)
219 set_bit(HCI_CONN_SSP_ENABLED
, &conn
->flags
);
222 cp
.pkt_type
= cpu_to_le16(conn
->pkt_type
);
223 if (lmp_rswitch_capable(hdev
) && !(hdev
->link_mode
& HCI_LM_MASTER
))
224 cp
.role_switch
= 0x01;
226 cp
.role_switch
= 0x00;
228 hci_send_cmd(hdev
, HCI_OP_CREATE_CONN
, sizeof(cp
), &cp
);
231 int hci_disconnect(struct hci_conn
*conn
, __u8 reason
)
233 BT_DBG("hcon %p", conn
);
235 /* When we are master of an established connection and it enters
236 * the disconnect timeout, then go ahead and try to read the
237 * current clock offset. Processing of the result is done
238 * within the event handling and hci_clock_offset_evt function.
240 if (conn
->type
== ACL_LINK
&& conn
->role
== HCI_ROLE_MASTER
&&
241 (conn
->state
== BT_CONNECTED
|| conn
->state
== BT_CONFIG
)) {
242 struct hci_dev
*hdev
= conn
->hdev
;
243 struct hci_cp_read_clock_offset clkoff_cp
;
245 clkoff_cp
.handle
= cpu_to_le16(conn
->handle
);
246 hci_send_cmd(hdev
, HCI_OP_READ_CLOCK_OFFSET
, sizeof(clkoff_cp
),
250 return hci_abort_conn(conn
, reason
);
253 static void hci_add_sco(struct hci_conn
*conn
, __u16 handle
)
255 struct hci_dev
*hdev
= conn
->hdev
;
256 struct hci_cp_add_sco cp
;
258 BT_DBG("hcon %p", conn
);
260 conn
->state
= BT_CONNECT
;
265 cp
.handle
= cpu_to_le16(handle
);
266 cp
.pkt_type
= cpu_to_le16(conn
->pkt_type
);
268 hci_send_cmd(hdev
, HCI_OP_ADD_SCO
, sizeof(cp
), &cp
);
271 bool hci_setup_sync(struct hci_conn
*conn
, __u16 handle
)
273 struct hci_dev
*hdev
= conn
->hdev
;
274 struct hci_cp_setup_sync_conn cp
;
275 const struct sco_param
*param
;
277 BT_DBG("hcon %p", conn
);
279 conn
->state
= BT_CONNECT
;
284 cp
.handle
= cpu_to_le16(handle
);
286 cp
.tx_bandwidth
= cpu_to_le32(0x00001f40);
287 cp
.rx_bandwidth
= cpu_to_le32(0x00001f40);
288 cp
.voice_setting
= cpu_to_le16(conn
->setting
);
290 switch (conn
->setting
& SCO_AIRMODE_MASK
) {
291 case SCO_AIRMODE_TRANSP
:
292 if (conn
->attempt
> ARRAY_SIZE(esco_param_msbc
))
294 param
= &esco_param_msbc
[conn
->attempt
- 1];
296 case SCO_AIRMODE_CVSD
:
297 if (lmp_esco_capable(conn
->link
)) {
298 if (conn
->attempt
> ARRAY_SIZE(esco_param_cvsd
))
300 param
= &esco_param_cvsd
[conn
->attempt
- 1];
302 if (conn
->attempt
> ARRAY_SIZE(sco_param_cvsd
))
304 param
= &sco_param_cvsd
[conn
->attempt
- 1];
311 cp
.retrans_effort
= param
->retrans_effort
;
312 cp
.pkt_type
= __cpu_to_le16(param
->pkt_type
);
313 cp
.max_latency
= __cpu_to_le16(param
->max_latency
);
315 if (hci_send_cmd(hdev
, HCI_OP_SETUP_SYNC_CONN
, sizeof(cp
), &cp
) < 0)
321 u8
hci_le_conn_update(struct hci_conn
*conn
, u16 min
, u16 max
, u16 latency
,
324 struct hci_dev
*hdev
= conn
->hdev
;
325 struct hci_conn_params
*params
;
326 struct hci_cp_le_conn_update cp
;
330 params
= hci_conn_params_lookup(hdev
, &conn
->dst
, conn
->dst_type
);
332 params
->conn_min_interval
= min
;
333 params
->conn_max_interval
= max
;
334 params
->conn_latency
= latency
;
335 params
->supervision_timeout
= to_multiplier
;
338 hci_dev_unlock(hdev
);
340 memset(&cp
, 0, sizeof(cp
));
341 cp
.handle
= cpu_to_le16(conn
->handle
);
342 cp
.conn_interval_min
= cpu_to_le16(min
);
343 cp
.conn_interval_max
= cpu_to_le16(max
);
344 cp
.conn_latency
= cpu_to_le16(latency
);
345 cp
.supervision_timeout
= cpu_to_le16(to_multiplier
);
346 cp
.min_ce_len
= cpu_to_le16(0x0000);
347 cp
.max_ce_len
= cpu_to_le16(0x0000);
349 hci_send_cmd(hdev
, HCI_OP_LE_CONN_UPDATE
, sizeof(cp
), &cp
);
357 void hci_le_start_enc(struct hci_conn
*conn
, __le16 ediv
, __le64 rand
,
358 __u8 ltk
[16], __u8 key_size
)
360 struct hci_dev
*hdev
= conn
->hdev
;
361 struct hci_cp_le_start_enc cp
;
363 BT_DBG("hcon %p", conn
);
365 memset(&cp
, 0, sizeof(cp
));
367 cp
.handle
= cpu_to_le16(conn
->handle
);
370 memcpy(cp
.ltk
, ltk
, key_size
);
372 hci_send_cmd(hdev
, HCI_OP_LE_START_ENC
, sizeof(cp
), &cp
);
375 /* Device _must_ be locked */
376 void hci_sco_setup(struct hci_conn
*conn
, __u8 status
)
378 struct hci_conn
*sco
= conn
->link
;
383 BT_DBG("hcon %p", conn
);
386 if (lmp_esco_capable(conn
->hdev
))
387 hci_setup_sync(sco
, conn
->handle
);
389 hci_add_sco(sco
, conn
->handle
);
391 hci_connect_cfm(sco
, status
);
396 static void hci_conn_timeout(struct work_struct
*work
)
398 struct hci_conn
*conn
= container_of(work
, struct hci_conn
,
400 int refcnt
= atomic_read(&conn
->refcnt
);
402 BT_DBG("hcon %p state %s", conn
, state_to_string(conn
->state
));
406 /* FIXME: It was observed that in pairing failed scenario, refcnt
407 * drops below 0. Probably this is because l2cap_conn_del calls
408 * l2cap_chan_del for each channel, and inside l2cap_chan_del conn is
409 * dropped. After that loop hci_chan_del is called which also drops
410 * conn. For now make sure that ACL is alive if refcnt is higher then 0,
416 /* LE connections in scanning state need special handling */
417 if (conn
->state
== BT_CONNECT
&& conn
->type
== LE_LINK
&&
418 test_bit(HCI_CONN_SCANNING
, &conn
->flags
)) {
419 hci_connect_le_scan_remove(conn
);
423 hci_abort_conn(conn
, hci_proto_disconn_ind(conn
));
426 /* Enter sniff mode */
427 static void hci_conn_idle(struct work_struct
*work
)
429 struct hci_conn
*conn
= container_of(work
, struct hci_conn
,
431 struct hci_dev
*hdev
= conn
->hdev
;
433 BT_DBG("hcon %p mode %d", conn
, conn
->mode
);
435 if (!lmp_sniff_capable(hdev
) || !lmp_sniff_capable(conn
))
438 if (conn
->mode
!= HCI_CM_ACTIVE
|| !(conn
->link_policy
& HCI_LP_SNIFF
))
441 if (lmp_sniffsubr_capable(hdev
) && lmp_sniffsubr_capable(conn
)) {
442 struct hci_cp_sniff_subrate cp
;
443 cp
.handle
= cpu_to_le16(conn
->handle
);
444 cp
.max_latency
= cpu_to_le16(0);
445 cp
.min_remote_timeout
= cpu_to_le16(0);
446 cp
.min_local_timeout
= cpu_to_le16(0);
447 hci_send_cmd(hdev
, HCI_OP_SNIFF_SUBRATE
, sizeof(cp
), &cp
);
450 if (!test_and_set_bit(HCI_CONN_MODE_CHANGE_PEND
, &conn
->flags
)) {
451 struct hci_cp_sniff_mode cp
;
452 cp
.handle
= cpu_to_le16(conn
->handle
);
453 cp
.max_interval
= cpu_to_le16(hdev
->sniff_max_interval
);
454 cp
.min_interval
= cpu_to_le16(hdev
->sniff_min_interval
);
455 cp
.attempt
= cpu_to_le16(4);
456 cp
.timeout
= cpu_to_le16(1);
457 hci_send_cmd(hdev
, HCI_OP_SNIFF_MODE
, sizeof(cp
), &cp
);
461 static void hci_conn_auto_accept(struct work_struct
*work
)
463 struct hci_conn
*conn
= container_of(work
, struct hci_conn
,
464 auto_accept_work
.work
);
466 hci_send_cmd(conn
->hdev
, HCI_OP_USER_CONFIRM_REPLY
, sizeof(conn
->dst
),
470 static void le_conn_timeout(struct work_struct
*work
)
472 struct hci_conn
*conn
= container_of(work
, struct hci_conn
,
473 le_conn_timeout
.work
);
474 struct hci_dev
*hdev
= conn
->hdev
;
478 /* We could end up here due to having done directed advertising,
479 * so clean up the state if necessary. This should however only
480 * happen with broken hardware or if low duty cycle was used
481 * (which doesn't have a timeout of its own).
483 if (conn
->role
== HCI_ROLE_SLAVE
) {
485 hci_send_cmd(hdev
, HCI_OP_LE_SET_ADV_ENABLE
, sizeof(enable
),
487 hci_le_conn_failed(conn
, HCI_ERROR_ADVERTISING_TIMEOUT
);
491 hci_abort_conn(conn
, HCI_ERROR_REMOTE_USER_TERM
);
494 struct hci_conn
*hci_conn_add(struct hci_dev
*hdev
, int type
, bdaddr_t
*dst
,
497 struct hci_conn
*conn
;
499 BT_DBG("%s dst %pMR", hdev
->name
, dst
);
501 conn
= kzalloc(sizeof(*conn
), GFP_KERNEL
);
505 bacpy(&conn
->dst
, dst
);
506 bacpy(&conn
->src
, &hdev
->bdaddr
);
510 conn
->mode
= HCI_CM_ACTIVE
;
511 conn
->state
= BT_OPEN
;
512 conn
->auth_type
= HCI_AT_GENERAL_BONDING
;
513 conn
->io_capability
= hdev
->io_capability
;
514 conn
->remote_auth
= 0xff;
515 conn
->key_type
= 0xff;
516 conn
->rssi
= HCI_RSSI_INVALID
;
517 conn
->tx_power
= HCI_TX_POWER_INVALID
;
518 conn
->max_tx_power
= HCI_TX_POWER_INVALID
;
520 set_bit(HCI_CONN_POWER_SAVE
, &conn
->flags
);
521 conn
->disc_timeout
= HCI_DISCONN_TIMEOUT
;
523 if (conn
->role
== HCI_ROLE_MASTER
)
528 conn
->pkt_type
= hdev
->pkt_type
& ACL_PTYPE_MASK
;
531 /* conn->src should reflect the local identity address */
532 hci_copy_identity_address(hdev
, &conn
->src
, &conn
->src_type
);
535 if (lmp_esco_capable(hdev
))
536 conn
->pkt_type
= (hdev
->esco_type
& SCO_ESCO_MASK
) |
537 (hdev
->esco_type
& EDR_ESCO_MASK
);
539 conn
->pkt_type
= hdev
->pkt_type
& SCO_PTYPE_MASK
;
542 conn
->pkt_type
= hdev
->esco_type
& ~EDR_ESCO_MASK
;
546 skb_queue_head_init(&conn
->data_q
);
548 INIT_LIST_HEAD(&conn
->chan_list
);
550 INIT_DELAYED_WORK(&conn
->disc_work
, hci_conn_timeout
);
551 INIT_DELAYED_WORK(&conn
->auto_accept_work
, hci_conn_auto_accept
);
552 INIT_DELAYED_WORK(&conn
->idle_work
, hci_conn_idle
);
553 INIT_DELAYED_WORK(&conn
->le_conn_timeout
, le_conn_timeout
);
554 INIT_WORK(&conn
->le_scan_cleanup
, le_scan_cleanup
);
556 atomic_set(&conn
->refcnt
, 0);
560 hci_conn_hash_add(hdev
, conn
);
562 hdev
->notify(hdev
, HCI_NOTIFY_CONN_ADD
);
564 hci_conn_init_sysfs(conn
);
569 int hci_conn_del(struct hci_conn
*conn
)
571 struct hci_dev
*hdev
= conn
->hdev
;
573 BT_DBG("%s hcon %p handle %d", hdev
->name
, conn
, conn
->handle
);
575 cancel_delayed_work_sync(&conn
->disc_work
);
576 cancel_delayed_work_sync(&conn
->auto_accept_work
);
577 cancel_delayed_work_sync(&conn
->idle_work
);
579 if (conn
->type
== ACL_LINK
) {
580 struct hci_conn
*sco
= conn
->link
;
585 hdev
->acl_cnt
+= conn
->sent
;
586 } else if (conn
->type
== LE_LINK
) {
587 cancel_delayed_work(&conn
->le_conn_timeout
);
590 hdev
->le_cnt
+= conn
->sent
;
592 hdev
->acl_cnt
+= conn
->sent
;
594 struct hci_conn
*acl
= conn
->link
;
602 amp_mgr_put(conn
->amp_mgr
);
604 skb_queue_purge(&conn
->data_q
);
606 /* Remove the connection from the list and cleanup its remaining
607 * state. This is a separate function since for some cases like
608 * BT_CONNECT_SCAN we *only* want the cleanup part without the
609 * rest of hci_conn_del.
611 hci_conn_cleanup(conn
);
616 struct hci_dev
*hci_get_route(bdaddr_t
*dst
, bdaddr_t
*src
)
618 int use_src
= bacmp(src
, BDADDR_ANY
);
619 struct hci_dev
*hdev
= NULL
, *d
;
621 BT_DBG("%pMR -> %pMR", src
, dst
);
623 read_lock(&hci_dev_list_lock
);
625 list_for_each_entry(d
, &hci_dev_list
, list
) {
626 if (!test_bit(HCI_UP
, &d
->flags
) ||
627 hci_dev_test_flag(d
, HCI_USER_CHANNEL
) ||
628 d
->dev_type
!= HCI_BREDR
)
632 * No source address - find interface with bdaddr != dst
633 * Source address - find interface with bdaddr == src
637 if (!bacmp(&d
->bdaddr
, src
)) {
641 if (bacmp(&d
->bdaddr
, dst
)) {
648 hdev
= hci_dev_hold(hdev
);
650 read_unlock(&hci_dev_list_lock
);
653 EXPORT_SYMBOL(hci_get_route
);
655 /* This function requires the caller holds hdev->lock */
656 void hci_le_conn_failed(struct hci_conn
*conn
, u8 status
)
658 struct hci_dev
*hdev
= conn
->hdev
;
659 struct hci_conn_params
*params
;
661 params
= hci_pend_le_action_lookup(&hdev
->pend_le_conns
, &conn
->dst
,
663 if (params
&& params
->conn
) {
664 hci_conn_drop(params
->conn
);
665 hci_conn_put(params
->conn
);
669 conn
->state
= BT_CLOSED
;
671 /* If the status indicates successful cancellation of
672 * the attempt (i.e. Unkown Connection Id) there's no point of
673 * notifying failure since we'll go back to keep trying to
674 * connect. The only exception is explicit connect requests
675 * where a timeout + cancel does indicate an actual failure.
677 if (status
!= HCI_ERROR_UNKNOWN_CONN_ID
||
678 (params
&& params
->explicit_connect
))
679 mgmt_connect_failed(hdev
, &conn
->dst
, conn
->type
,
680 conn
->dst_type
, status
);
682 hci_connect_cfm(conn
, status
);
686 /* Since we may have temporarily stopped the background scanning in
687 * favor of connection establishment, we should restart it.
689 hci_update_background_scan(hdev
);
691 /* Re-enable advertising in case this was a failed connection
692 * attempt as a peripheral.
694 hci_req_reenable_advertising(hdev
);
697 static void create_le_conn_complete(struct hci_dev
*hdev
, u8 status
, u16 opcode
)
699 struct hci_conn
*conn
;
703 conn
= hci_lookup_le_connect(hdev
);
706 hci_connect_le_scan_cleanup(conn
);
710 BT_ERR("HCI request failed to create LE connection: status 0x%2.2x",
716 hci_le_conn_failed(conn
, status
);
719 hci_dev_unlock(hdev
);
722 static void hci_req_add_le_create_conn(struct hci_request
*req
,
723 struct hci_conn
*conn
)
725 struct hci_cp_le_create_conn cp
;
726 struct hci_dev
*hdev
= conn
->hdev
;
729 memset(&cp
, 0, sizeof(cp
));
731 /* Update random address, but set require_privacy to false so
732 * that we never connect with an non-resolvable address.
734 if (hci_update_random_address(req
, false, &own_addr_type
))
737 /* Set window to be the same value as the interval to enable
738 * continuous scanning.
740 cp
.scan_interval
= cpu_to_le16(hdev
->le_scan_interval
);
741 cp
.scan_window
= cp
.scan_interval
;
743 bacpy(&cp
.peer_addr
, &conn
->dst
);
744 cp
.peer_addr_type
= conn
->dst_type
;
745 cp
.own_address_type
= own_addr_type
;
746 cp
.conn_interval_min
= cpu_to_le16(conn
->le_conn_min_interval
);
747 cp
.conn_interval_max
= cpu_to_le16(conn
->le_conn_max_interval
);
748 cp
.conn_latency
= cpu_to_le16(conn
->le_conn_latency
);
749 cp
.supervision_timeout
= cpu_to_le16(conn
->le_supv_timeout
);
750 cp
.min_ce_len
= cpu_to_le16(0x0000);
751 cp
.max_ce_len
= cpu_to_le16(0x0000);
753 hci_req_add(req
, HCI_OP_LE_CREATE_CONN
, sizeof(cp
), &cp
);
755 conn
->state
= BT_CONNECT
;
756 clear_bit(HCI_CONN_SCANNING
, &conn
->flags
);
759 static void hci_req_directed_advertising(struct hci_request
*req
,
760 struct hci_conn
*conn
)
762 struct hci_dev
*hdev
= req
->hdev
;
763 struct hci_cp_le_set_adv_param cp
;
767 /* Clear the HCI_LE_ADV bit temporarily so that the
768 * hci_update_random_address knows that it's safe to go ahead
769 * and write a new random address. The flag will be set back on
770 * as soon as the SET_ADV_ENABLE HCI command completes.
772 hci_dev_clear_flag(hdev
, HCI_LE_ADV
);
774 /* Set require_privacy to false so that the remote device has a
775 * chance of identifying us.
777 if (hci_update_random_address(req
, false, &own_addr_type
) < 0)
780 memset(&cp
, 0, sizeof(cp
));
781 cp
.type
= LE_ADV_DIRECT_IND
;
782 cp
.own_address_type
= own_addr_type
;
783 cp
.direct_addr_type
= conn
->dst_type
;
784 bacpy(&cp
.direct_addr
, &conn
->dst
);
785 cp
.channel_map
= hdev
->le_adv_channel_map
;
787 hci_req_add(req
, HCI_OP_LE_SET_ADV_PARAM
, sizeof(cp
), &cp
);
790 hci_req_add(req
, HCI_OP_LE_SET_ADV_ENABLE
, sizeof(enable
), &enable
);
792 conn
->state
= BT_CONNECT
;
795 struct hci_conn
*hci_connect_le(struct hci_dev
*hdev
, bdaddr_t
*dst
,
796 u8 dst_type
, u8 sec_level
, u16 conn_timeout
,
799 struct hci_conn_params
*params
;
800 struct hci_conn
*conn
;
802 struct hci_request req
;
805 /* Let's make sure that le is enabled.*/
806 if (!hci_dev_test_flag(hdev
, HCI_LE_ENABLED
)) {
807 if (lmp_le_capable(hdev
))
808 return ERR_PTR(-ECONNREFUSED
);
810 return ERR_PTR(-EOPNOTSUPP
);
813 /* Since the controller supports only one LE connection attempt at a
814 * time, we return -EBUSY if there is any connection attempt running.
816 if (hci_lookup_le_connect(hdev
))
817 return ERR_PTR(-EBUSY
);
819 /* If there's already a connection object but it's not in
820 * scanning state it means it must already be established, in
821 * which case we can't do anything else except report a failure
824 conn
= hci_conn_hash_lookup_le(hdev
, dst
, dst_type
);
825 if (conn
&& !test_bit(HCI_CONN_SCANNING
, &conn
->flags
)) {
826 return ERR_PTR(-EBUSY
);
829 /* When given an identity address with existing identity
830 * resolving key, the connection needs to be established
831 * to a resolvable random address.
833 * Storing the resolvable random address is required here
834 * to handle connection failures. The address will later
835 * be resolved back into the original identity address
836 * from the connect request.
838 irk
= hci_find_irk_by_addr(hdev
, dst
, dst_type
);
839 if (irk
&& bacmp(&irk
->rpa
, BDADDR_ANY
)) {
841 dst_type
= ADDR_LE_DEV_RANDOM
;
845 bacpy(&conn
->dst
, dst
);
847 conn
= hci_conn_add(hdev
, LE_LINK
, dst
, role
);
849 return ERR_PTR(-ENOMEM
);
851 conn
->pending_sec_level
= sec_level
;
854 conn
->dst_type
= dst_type
;
855 conn
->sec_level
= BT_SECURITY_LOW
;
856 conn
->conn_timeout
= conn_timeout
;
858 hci_req_init(&req
, hdev
);
860 /* Disable advertising if we're active. For master role
861 * connections most controllers will refuse to connect if
862 * advertising is enabled, and for slave role connections we
863 * anyway have to disable it in order to start directed
866 if (hci_dev_test_flag(hdev
, HCI_LE_ADV
)) {
868 hci_req_add(&req
, HCI_OP_LE_SET_ADV_ENABLE
, sizeof(enable
),
872 /* If requested to connect as slave use directed advertising */
873 if (conn
->role
== HCI_ROLE_SLAVE
) {
874 /* If we're active scanning most controllers are unable
875 * to initiate advertising. Simply reject the attempt.
877 if (hci_dev_test_flag(hdev
, HCI_LE_SCAN
) &&
878 hdev
->le_scan_type
== LE_SCAN_ACTIVE
) {
879 skb_queue_purge(&req
.cmd_q
);
881 return ERR_PTR(-EBUSY
);
884 hci_req_directed_advertising(&req
, conn
);
888 params
= hci_conn_params_lookup(hdev
, &conn
->dst
, conn
->dst_type
);
890 conn
->le_conn_min_interval
= params
->conn_min_interval
;
891 conn
->le_conn_max_interval
= params
->conn_max_interval
;
892 conn
->le_conn_latency
= params
->conn_latency
;
893 conn
->le_supv_timeout
= params
->supervision_timeout
;
895 conn
->le_conn_min_interval
= hdev
->le_conn_min_interval
;
896 conn
->le_conn_max_interval
= hdev
->le_conn_max_interval
;
897 conn
->le_conn_latency
= hdev
->le_conn_latency
;
898 conn
->le_supv_timeout
= hdev
->le_supv_timeout
;
901 /* If controller is scanning, we stop it since some controllers are
902 * not able to scan and connect at the same time. Also set the
903 * HCI_LE_SCAN_INTERRUPTED flag so that the command complete
904 * handler for scan disabling knows to set the correct discovery
907 if (hci_dev_test_flag(hdev
, HCI_LE_SCAN
)) {
908 hci_req_add_le_scan_disable(&req
);
909 hci_dev_set_flag(hdev
, HCI_LE_SCAN_INTERRUPTED
);
912 hci_req_add_le_create_conn(&req
, conn
);
915 err
= hci_req_run(&req
, create_le_conn_complete
);
924 static bool is_connected(struct hci_dev
*hdev
, bdaddr_t
*addr
, u8 type
)
926 struct hci_conn
*conn
;
928 conn
= hci_conn_hash_lookup_le(hdev
, addr
, type
);
932 if (conn
->state
!= BT_CONNECTED
)
938 /* This function requires the caller holds hdev->lock */
939 static int hci_explicit_conn_params_set(struct hci_dev
*hdev
,
940 bdaddr_t
*addr
, u8 addr_type
)
942 struct hci_conn_params
*params
;
944 if (is_connected(hdev
, addr
, addr_type
))
947 params
= hci_conn_params_lookup(hdev
, addr
, addr_type
);
949 params
= hci_conn_params_add(hdev
, addr
, addr_type
);
953 /* If we created new params, mark them to be deleted in
954 * hci_connect_le_scan_cleanup. It's different case than
955 * existing disabled params, those will stay after cleanup.
957 params
->auto_connect
= HCI_AUTO_CONN_EXPLICIT
;
960 /* We're trying to connect, so make sure params are at pend_le_conns */
961 if (params
->auto_connect
== HCI_AUTO_CONN_DISABLED
||
962 params
->auto_connect
== HCI_AUTO_CONN_REPORT
||
963 params
->auto_connect
== HCI_AUTO_CONN_EXPLICIT
) {
964 list_del_init(¶ms
->action
);
965 list_add(¶ms
->action
, &hdev
->pend_le_conns
);
968 params
->explicit_connect
= true;
970 BT_DBG("addr %pMR (type %u) auto_connect %u", addr
, addr_type
,
971 params
->auto_connect
);
976 /* This function requires the caller holds hdev->lock */
977 struct hci_conn
*hci_connect_le_scan(struct hci_dev
*hdev
, bdaddr_t
*dst
,
978 u8 dst_type
, u8 sec_level
,
981 struct hci_conn
*conn
;
983 /* Let's make sure that le is enabled.*/
984 if (!hci_dev_test_flag(hdev
, HCI_LE_ENABLED
)) {
985 if (lmp_le_capable(hdev
))
986 return ERR_PTR(-ECONNREFUSED
);
988 return ERR_PTR(-EOPNOTSUPP
);
991 /* Some devices send ATT messages as soon as the physical link is
992 * established. To be able to handle these ATT messages, the user-
993 * space first establishes the connection and then starts the pairing
996 * So if a hci_conn object already exists for the following connection
997 * attempt, we simply update pending_sec_level and auth_type fields
998 * and return the object found.
1000 conn
= hci_conn_hash_lookup_le(hdev
, dst
, dst_type
);
1002 if (conn
->pending_sec_level
< sec_level
)
1003 conn
->pending_sec_level
= sec_level
;
1007 BT_DBG("requesting refresh of dst_addr");
1009 conn
= hci_conn_add(hdev
, LE_LINK
, dst
, HCI_ROLE_MASTER
);
1011 return ERR_PTR(-ENOMEM
);
1013 if (hci_explicit_conn_params_set(hdev
, dst
, dst_type
) < 0)
1014 return ERR_PTR(-EBUSY
);
1016 conn
->state
= BT_CONNECT
;
1017 set_bit(HCI_CONN_SCANNING
, &conn
->flags
);
1018 conn
->dst_type
= dst_type
;
1019 conn
->sec_level
= BT_SECURITY_LOW
;
1020 conn
->pending_sec_level
= sec_level
;
1021 conn
->conn_timeout
= conn_timeout
;
1023 hci_update_background_scan(hdev
);
1026 hci_conn_hold(conn
);
1030 struct hci_conn
*hci_connect_acl(struct hci_dev
*hdev
, bdaddr_t
*dst
,
1031 u8 sec_level
, u8 auth_type
)
1033 struct hci_conn
*acl
;
1035 if (!hci_dev_test_flag(hdev
, HCI_BREDR_ENABLED
)) {
1036 if (lmp_bredr_capable(hdev
))
1037 return ERR_PTR(-ECONNREFUSED
);
1039 return ERR_PTR(-EOPNOTSUPP
);
1042 acl
= hci_conn_hash_lookup_ba(hdev
, ACL_LINK
, dst
);
1044 acl
= hci_conn_add(hdev
, ACL_LINK
, dst
, HCI_ROLE_MASTER
);
1046 return ERR_PTR(-ENOMEM
);
1051 if (acl
->state
== BT_OPEN
|| acl
->state
== BT_CLOSED
) {
1052 acl
->sec_level
= BT_SECURITY_LOW
;
1053 acl
->pending_sec_level
= sec_level
;
1054 acl
->auth_type
= auth_type
;
1055 hci_acl_create_connection(acl
);
1061 struct hci_conn
*hci_connect_sco(struct hci_dev
*hdev
, int type
, bdaddr_t
*dst
,
1064 struct hci_conn
*acl
;
1065 struct hci_conn
*sco
;
1067 acl
= hci_connect_acl(hdev
, dst
, BT_SECURITY_LOW
, HCI_AT_NO_BONDING
);
1071 sco
= hci_conn_hash_lookup_ba(hdev
, type
, dst
);
1073 sco
= hci_conn_add(hdev
, type
, dst
, HCI_ROLE_MASTER
);
1076 return ERR_PTR(-ENOMEM
);
1085 sco
->setting
= setting
;
1087 if (acl
->state
== BT_CONNECTED
&&
1088 (sco
->state
== BT_OPEN
|| sco
->state
== BT_CLOSED
)) {
1089 set_bit(HCI_CONN_POWER_SAVE
, &acl
->flags
);
1090 hci_conn_enter_active_mode(acl
, BT_POWER_FORCE_ACTIVE_ON
);
1092 if (test_bit(HCI_CONN_MODE_CHANGE_PEND
, &acl
->flags
)) {
1093 /* defer SCO setup until mode change completed */
1094 set_bit(HCI_CONN_SCO_SETUP_PEND
, &acl
->flags
);
1098 hci_sco_setup(acl
, 0x00);
1104 /* Check link security requirement */
1105 int hci_conn_check_link_mode(struct hci_conn
*conn
)
1107 BT_DBG("hcon %p", conn
);
1109 /* In Secure Connections Only mode, it is required that Secure
1110 * Connections is used and the link is encrypted with AES-CCM
1111 * using a P-256 authenticated combination key.
1113 if (hci_dev_test_flag(conn
->hdev
, HCI_SC_ONLY
)) {
1114 if (!hci_conn_sc_enabled(conn
) ||
1115 !test_bit(HCI_CONN_AES_CCM
, &conn
->flags
) ||
1116 conn
->key_type
!= HCI_LK_AUTH_COMBINATION_P256
)
1120 if (hci_conn_ssp_enabled(conn
) &&
1121 !test_bit(HCI_CONN_ENCRYPT
, &conn
->flags
))
1127 /* Authenticate remote device */
1128 static int hci_conn_auth(struct hci_conn
*conn
, __u8 sec_level
, __u8 auth_type
)
1130 BT_DBG("hcon %p", conn
);
1132 if (conn
->pending_sec_level
> sec_level
)
1133 sec_level
= conn
->pending_sec_level
;
1135 if (sec_level
> conn
->sec_level
)
1136 conn
->pending_sec_level
= sec_level
;
1137 else if (test_bit(HCI_CONN_AUTH
, &conn
->flags
))
1140 /* Make sure we preserve an existing MITM requirement*/
1141 auth_type
|= (conn
->auth_type
& 0x01);
1143 conn
->auth_type
= auth_type
;
1145 if (!test_and_set_bit(HCI_CONN_AUTH_PEND
, &conn
->flags
)) {
1146 struct hci_cp_auth_requested cp
;
1148 cp
.handle
= cpu_to_le16(conn
->handle
);
1149 hci_send_cmd(conn
->hdev
, HCI_OP_AUTH_REQUESTED
,
1152 /* If we're already encrypted set the REAUTH_PEND flag,
1153 * otherwise set the ENCRYPT_PEND.
1155 if (test_bit(HCI_CONN_ENCRYPT
, &conn
->flags
))
1156 set_bit(HCI_CONN_REAUTH_PEND
, &conn
->flags
);
1158 set_bit(HCI_CONN_ENCRYPT_PEND
, &conn
->flags
);
1164 /* Encrypt the the link */
1165 static void hci_conn_encrypt(struct hci_conn
*conn
)
1167 BT_DBG("hcon %p", conn
);
1169 if (!test_and_set_bit(HCI_CONN_ENCRYPT_PEND
, &conn
->flags
)) {
1170 struct hci_cp_set_conn_encrypt cp
;
1171 cp
.handle
= cpu_to_le16(conn
->handle
);
1173 hci_send_cmd(conn
->hdev
, HCI_OP_SET_CONN_ENCRYPT
, sizeof(cp
),
1178 /* Enable security */
1179 int hci_conn_security(struct hci_conn
*conn
, __u8 sec_level
, __u8 auth_type
,
1182 BT_DBG("hcon %p", conn
);
1184 if (conn
->type
== LE_LINK
)
1185 return smp_conn_security(conn
, sec_level
);
1187 /* For sdp we don't need the link key. */
1188 if (sec_level
== BT_SECURITY_SDP
)
1191 /* For non 2.1 devices and low security level we don't need the link
1193 if (sec_level
== BT_SECURITY_LOW
&& !hci_conn_ssp_enabled(conn
))
1196 /* For other security levels we need the link key. */
1197 if (!test_bit(HCI_CONN_AUTH
, &conn
->flags
))
1200 /* An authenticated FIPS approved combination key has sufficient
1201 * security for security level 4. */
1202 if (conn
->key_type
== HCI_LK_AUTH_COMBINATION_P256
&&
1203 sec_level
== BT_SECURITY_FIPS
)
1206 /* An authenticated combination key has sufficient security for
1207 security level 3. */
1208 if ((conn
->key_type
== HCI_LK_AUTH_COMBINATION_P192
||
1209 conn
->key_type
== HCI_LK_AUTH_COMBINATION_P256
) &&
1210 sec_level
== BT_SECURITY_HIGH
)
1213 /* An unauthenticated combination key has sufficient security for
1214 security level 1 and 2. */
1215 if ((conn
->key_type
== HCI_LK_UNAUTH_COMBINATION_P192
||
1216 conn
->key_type
== HCI_LK_UNAUTH_COMBINATION_P256
) &&
1217 (sec_level
== BT_SECURITY_MEDIUM
|| sec_level
== BT_SECURITY_LOW
))
1220 /* A combination key has always sufficient security for the security
1221 levels 1 or 2. High security level requires the combination key
1222 is generated using maximum PIN code length (16).
1223 For pre 2.1 units. */
1224 if (conn
->key_type
== HCI_LK_COMBINATION
&&
1225 (sec_level
== BT_SECURITY_MEDIUM
|| sec_level
== BT_SECURITY_LOW
||
1226 conn
->pin_length
== 16))
1230 if (test_bit(HCI_CONN_ENCRYPT_PEND
, &conn
->flags
))
1234 set_bit(HCI_CONN_AUTH_INITIATOR
, &conn
->flags
);
1236 if (!hci_conn_auth(conn
, sec_level
, auth_type
))
1240 if (test_bit(HCI_CONN_ENCRYPT
, &conn
->flags
))
1243 hci_conn_encrypt(conn
);
1246 EXPORT_SYMBOL(hci_conn_security
);
1248 /* Check secure link requirement */
1249 int hci_conn_check_secure(struct hci_conn
*conn
, __u8 sec_level
)
1251 BT_DBG("hcon %p", conn
);
1253 /* Accept if non-secure or higher security level is required */
1254 if (sec_level
!= BT_SECURITY_HIGH
&& sec_level
!= BT_SECURITY_FIPS
)
1257 /* Accept if secure or higher security level is already present */
1258 if (conn
->sec_level
== BT_SECURITY_HIGH
||
1259 conn
->sec_level
== BT_SECURITY_FIPS
)
1262 /* Reject not secure link */
1265 EXPORT_SYMBOL(hci_conn_check_secure
);
1268 int hci_conn_switch_role(struct hci_conn
*conn
, __u8 role
)
1270 BT_DBG("hcon %p", conn
);
1272 if (role
== conn
->role
)
1275 if (!test_and_set_bit(HCI_CONN_RSWITCH_PEND
, &conn
->flags
)) {
1276 struct hci_cp_switch_role cp
;
1277 bacpy(&cp
.bdaddr
, &conn
->dst
);
1279 hci_send_cmd(conn
->hdev
, HCI_OP_SWITCH_ROLE
, sizeof(cp
), &cp
);
1284 EXPORT_SYMBOL(hci_conn_switch_role
);
1286 /* Enter active mode */
1287 void hci_conn_enter_active_mode(struct hci_conn
*conn
, __u8 force_active
)
1289 struct hci_dev
*hdev
= conn
->hdev
;
1291 BT_DBG("hcon %p mode %d", conn
, conn
->mode
);
1293 if (conn
->mode
!= HCI_CM_SNIFF
)
1296 if (!test_bit(HCI_CONN_POWER_SAVE
, &conn
->flags
) && !force_active
)
1299 if (!test_and_set_bit(HCI_CONN_MODE_CHANGE_PEND
, &conn
->flags
)) {
1300 struct hci_cp_exit_sniff_mode cp
;
1301 cp
.handle
= cpu_to_le16(conn
->handle
);
1302 hci_send_cmd(hdev
, HCI_OP_EXIT_SNIFF_MODE
, sizeof(cp
), &cp
);
1306 if (hdev
->idle_timeout
> 0)
1307 queue_delayed_work(hdev
->workqueue
, &conn
->idle_work
,
1308 msecs_to_jiffies(hdev
->idle_timeout
));
1311 /* Drop all connection on the device */
1312 void hci_conn_hash_flush(struct hci_dev
*hdev
)
1314 struct hci_conn_hash
*h
= &hdev
->conn_hash
;
1315 struct hci_conn
*c
, *n
;
1317 BT_DBG("hdev %s", hdev
->name
);
1319 list_for_each_entry_safe(c
, n
, &h
->list
, list
) {
1320 c
->state
= BT_CLOSED
;
1322 hci_disconn_cfm(c
, HCI_ERROR_LOCAL_HOST_TERM
);
1327 /* Check pending connect attempts */
1328 void hci_conn_check_pending(struct hci_dev
*hdev
)
1330 struct hci_conn
*conn
;
1332 BT_DBG("hdev %s", hdev
->name
);
1336 conn
= hci_conn_hash_lookup_state(hdev
, ACL_LINK
, BT_CONNECT2
);
1338 hci_acl_create_connection(conn
);
1340 hci_dev_unlock(hdev
);
1343 static u32
get_link_mode(struct hci_conn
*conn
)
1347 if (conn
->role
== HCI_ROLE_MASTER
)
1348 link_mode
|= HCI_LM_MASTER
;
1350 if (test_bit(HCI_CONN_ENCRYPT
, &conn
->flags
))
1351 link_mode
|= HCI_LM_ENCRYPT
;
1353 if (test_bit(HCI_CONN_AUTH
, &conn
->flags
))
1354 link_mode
|= HCI_LM_AUTH
;
1356 if (test_bit(HCI_CONN_SECURE
, &conn
->flags
))
1357 link_mode
|= HCI_LM_SECURE
;
1359 if (test_bit(HCI_CONN_FIPS
, &conn
->flags
))
1360 link_mode
|= HCI_LM_FIPS
;
1365 int hci_get_conn_list(void __user
*arg
)
1368 struct hci_conn_list_req req
, *cl
;
1369 struct hci_conn_info
*ci
;
1370 struct hci_dev
*hdev
;
1371 int n
= 0, size
, err
;
1373 if (copy_from_user(&req
, arg
, sizeof(req
)))
1376 if (!req
.conn_num
|| req
.conn_num
> (PAGE_SIZE
* 2) / sizeof(*ci
))
1379 size
= sizeof(req
) + req
.conn_num
* sizeof(*ci
);
1381 cl
= kmalloc(size
, GFP_KERNEL
);
1385 hdev
= hci_dev_get(req
.dev_id
);
1394 list_for_each_entry(c
, &hdev
->conn_hash
.list
, list
) {
1395 bacpy(&(ci
+ n
)->bdaddr
, &c
->dst
);
1396 (ci
+ n
)->handle
= c
->handle
;
1397 (ci
+ n
)->type
= c
->type
;
1398 (ci
+ n
)->out
= c
->out
;
1399 (ci
+ n
)->state
= c
->state
;
1400 (ci
+ n
)->link_mode
= get_link_mode(c
);
1401 if (++n
>= req
.conn_num
)
1404 hci_dev_unlock(hdev
);
1406 cl
->dev_id
= hdev
->id
;
1408 size
= sizeof(req
) + n
* sizeof(*ci
);
1412 err
= copy_to_user(arg
, cl
, size
);
1415 return err
? -EFAULT
: 0;
1418 int hci_get_conn_info(struct hci_dev
*hdev
, void __user
*arg
)
1420 struct hci_conn_info_req req
;
1421 struct hci_conn_info ci
;
1422 struct hci_conn
*conn
;
1423 char __user
*ptr
= arg
+ sizeof(req
);
1425 if (copy_from_user(&req
, arg
, sizeof(req
)))
1429 conn
= hci_conn_hash_lookup_ba(hdev
, req
.type
, &req
.bdaddr
);
1431 bacpy(&ci
.bdaddr
, &conn
->dst
);
1432 ci
.handle
= conn
->handle
;
1433 ci
.type
= conn
->type
;
1435 ci
.state
= conn
->state
;
1436 ci
.link_mode
= get_link_mode(conn
);
1438 hci_dev_unlock(hdev
);
1443 return copy_to_user(ptr
, &ci
, sizeof(ci
)) ? -EFAULT
: 0;
1446 int hci_get_auth_info(struct hci_dev
*hdev
, void __user
*arg
)
1448 struct hci_auth_info_req req
;
1449 struct hci_conn
*conn
;
1451 if (copy_from_user(&req
, arg
, sizeof(req
)))
1455 conn
= hci_conn_hash_lookup_ba(hdev
, ACL_LINK
, &req
.bdaddr
);
1457 req
.type
= conn
->auth_type
;
1458 hci_dev_unlock(hdev
);
1463 return copy_to_user(arg
, &req
, sizeof(req
)) ? -EFAULT
: 0;
1466 struct hci_chan
*hci_chan_create(struct hci_conn
*conn
)
1468 struct hci_dev
*hdev
= conn
->hdev
;
1469 struct hci_chan
*chan
;
1471 BT_DBG("%s hcon %p", hdev
->name
, conn
);
1473 if (test_bit(HCI_CONN_DROP
, &conn
->flags
)) {
1474 BT_DBG("Refusing to create new hci_chan");
1478 chan
= kzalloc(sizeof(*chan
), GFP_KERNEL
);
1482 chan
->conn
= hci_conn_get(conn
);
1483 skb_queue_head_init(&chan
->data_q
);
1484 chan
->state
= BT_CONNECTED
;
1486 list_add_rcu(&chan
->list
, &conn
->chan_list
);
1491 void hci_chan_del(struct hci_chan
*chan
)
1493 struct hci_conn
*conn
= chan
->conn
;
1494 struct hci_dev
*hdev
= conn
->hdev
;
1496 BT_DBG("%s hcon %p chan %p", hdev
->name
, conn
, chan
);
1498 list_del_rcu(&chan
->list
);
1502 /* Prevent new hci_chan's to be created for this hci_conn */
1503 set_bit(HCI_CONN_DROP
, &conn
->flags
);
1507 skb_queue_purge(&chan
->data_q
);
1511 void hci_chan_list_flush(struct hci_conn
*conn
)
1513 struct hci_chan
*chan
, *n
;
1515 BT_DBG("hcon %p", conn
);
1517 list_for_each_entry_safe(chan
, n
, &conn
->chan_list
, list
)
1521 static struct hci_chan
*__hci_chan_lookup_handle(struct hci_conn
*hcon
,
1524 struct hci_chan
*hchan
;
1526 list_for_each_entry(hchan
, &hcon
->chan_list
, list
) {
1527 if (hchan
->handle
== handle
)
1534 struct hci_chan
*hci_chan_lookup_handle(struct hci_dev
*hdev
, __u16 handle
)
1536 struct hci_conn_hash
*h
= &hdev
->conn_hash
;
1537 struct hci_conn
*hcon
;
1538 struct hci_chan
*hchan
= NULL
;
1542 list_for_each_entry_rcu(hcon
, &h
->list
, list
) {
1543 hchan
= __hci_chan_lookup_handle(hcon
, handle
);