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);
125 if (conn->type == SCO_LINK || conn->type == ESCO_LINK) {
126 switch (conn->setting & SCO_AIRMODE_MASK) {
127 case SCO_AIRMODE_CVSD:
128 case SCO_AIRMODE_TRANSP:
130 hdev->notify(hdev, HCI_NOTIFY_DISABLE_SCO);
135 hdev->notify(hdev, HCI_NOTIFY_CONN_DEL);
138 debugfs_remove_recursive(conn->debugfs);
140 hci_conn_del_sysfs(conn);
145 static void le_scan_cleanup(struct work_struct *work)
147 struct hci_conn *conn = container_of(work, struct hci_conn,
149 struct hci_dev *hdev = conn->hdev;
150 struct hci_conn *c = NULL;
152 BT_DBG("%s hcon %p", hdev->name, conn);
156 /* Check that the hci_conn is still around */
158 list_for_each_entry_rcu(c, &hdev->conn_hash.list, list) {
165 hci_connect_le_scan_cleanup(conn);
166 hci_conn_cleanup(conn);
169 hci_dev_unlock(hdev);
174 static void hci_connect_le_scan_remove(struct hci_conn *conn)
176 BT_DBG("%s hcon %p", conn->hdev->name, conn);
178 /* We can't call hci_conn_del/hci_conn_cleanup here since that
179 * could deadlock with another hci_conn_del() call that's holding
180 * hci_dev_lock and doing cancel_delayed_work_sync(&conn->disc_work).
181 * Instead, grab temporary extra references to the hci_dev and
182 * hci_conn and perform the necessary cleanup in a separate work
186 hci_dev_hold(conn->hdev);
189 /* Even though we hold a reference to the hdev, many other
190 * things might get cleaned up meanwhile, including the hdev's
191 * own workqueue, so we can't use that for scheduling.
193 schedule_work(&conn->le_scan_cleanup);
196 static void hci_acl_create_connection(struct hci_conn *conn)
198 struct hci_dev *hdev = conn->hdev;
199 struct inquiry_entry *ie;
200 struct hci_cp_create_conn cp;
202 BT_DBG("hcon %p", conn);
204 conn->state = BT_CONNECT;
206 conn->role = HCI_ROLE_MASTER;
210 conn->link_policy = hdev->link_policy;
212 memset(&cp, 0, sizeof(cp));
213 bacpy(&cp.bdaddr, &conn->dst);
214 cp.pscan_rep_mode = 0x02;
216 ie = hci_inquiry_cache_lookup(hdev, &conn->dst);
218 if (inquiry_entry_age(ie) <= INQUIRY_ENTRY_AGE_MAX) {
219 cp.pscan_rep_mode = ie->data.pscan_rep_mode;
220 cp.pscan_mode = ie->data.pscan_mode;
221 cp.clock_offset = ie->data.clock_offset |
225 memcpy(conn->dev_class, ie->data.dev_class, 3);
228 cp.pkt_type = cpu_to_le16(conn->pkt_type);
229 if (lmp_rswitch_capable(hdev) && !(hdev->link_mode & HCI_LM_MASTER))
230 cp.role_switch = 0x01;
232 cp.role_switch = 0x00;
234 hci_send_cmd(hdev, HCI_OP_CREATE_CONN, sizeof(cp), &cp);
237 int hci_disconnect(struct hci_conn *conn, __u8 reason)
239 BT_DBG("hcon %p", conn);
241 /* When we are central of an established connection and it enters
242 * the disconnect timeout, then go ahead and try to read the
243 * current clock offset. Processing of the result is done
244 * within the event handling and hci_clock_offset_evt function.
246 if (conn->type == ACL_LINK && conn->role == HCI_ROLE_MASTER &&
247 (conn->state == BT_CONNECTED || conn->state == BT_CONFIG)) {
248 struct hci_dev *hdev = conn->hdev;
249 struct hci_cp_read_clock_offset clkoff_cp;
251 clkoff_cp.handle = cpu_to_le16(conn->handle);
252 hci_send_cmd(hdev, HCI_OP_READ_CLOCK_OFFSET, sizeof(clkoff_cp),
256 return hci_abort_conn(conn, reason);
259 static void hci_add_sco(struct hci_conn *conn, __u16 handle)
261 struct hci_dev *hdev = conn->hdev;
262 struct hci_cp_add_sco cp;
264 BT_DBG("hcon %p", conn);
266 conn->state = BT_CONNECT;
271 cp.handle = cpu_to_le16(handle);
272 cp.pkt_type = cpu_to_le16(conn->pkt_type);
274 hci_send_cmd(hdev, HCI_OP_ADD_SCO, sizeof(cp), &cp);
277 bool hci_setup_sync(struct hci_conn *conn, __u16 handle)
279 struct hci_dev *hdev = conn->hdev;
280 struct hci_cp_setup_sync_conn cp;
281 const struct sco_param *param;
283 BT_DBG("hcon %p", conn);
285 conn->state = BT_CONNECT;
290 cp.handle = cpu_to_le16(handle);
292 cp.tx_bandwidth = cpu_to_le32(0x00001f40);
293 cp.rx_bandwidth = cpu_to_le32(0x00001f40);
294 cp.voice_setting = cpu_to_le16(conn->setting);
296 switch (conn->setting & SCO_AIRMODE_MASK) {
297 case SCO_AIRMODE_TRANSP:
298 if (conn->attempt > ARRAY_SIZE(esco_param_msbc))
300 param = &esco_param_msbc[conn->attempt - 1];
302 case SCO_AIRMODE_CVSD:
303 if (lmp_esco_capable(conn->link)) {
304 if (conn->attempt > ARRAY_SIZE(esco_param_cvsd))
306 param = &esco_param_cvsd[conn->attempt - 1];
308 if (conn->attempt > ARRAY_SIZE(sco_param_cvsd))
310 param = &sco_param_cvsd[conn->attempt - 1];
317 cp.retrans_effort = param->retrans_effort;
318 cp.pkt_type = __cpu_to_le16(param->pkt_type);
319 cp.max_latency = __cpu_to_le16(param->max_latency);
321 if (hci_send_cmd(hdev, HCI_OP_SETUP_SYNC_CONN, sizeof(cp), &cp) < 0)
327 u8 hci_le_conn_update(struct hci_conn *conn, u16 min, u16 max, u16 latency,
330 struct hci_dev *hdev = conn->hdev;
331 struct hci_conn_params *params;
332 struct hci_cp_le_conn_update cp;
336 params = hci_conn_params_lookup(hdev, &conn->dst, conn->dst_type);
338 params->conn_min_interval = min;
339 params->conn_max_interval = max;
340 params->conn_latency = latency;
341 params->supervision_timeout = to_multiplier;
344 hci_dev_unlock(hdev);
346 memset(&cp, 0, sizeof(cp));
347 cp.handle = cpu_to_le16(conn->handle);
348 cp.conn_interval_min = cpu_to_le16(min);
349 cp.conn_interval_max = cpu_to_le16(max);
350 cp.conn_latency = cpu_to_le16(latency);
351 cp.supervision_timeout = cpu_to_le16(to_multiplier);
352 cp.min_ce_len = cpu_to_le16(0x0000);
353 cp.max_ce_len = cpu_to_le16(0x0000);
355 hci_send_cmd(hdev, HCI_OP_LE_CONN_UPDATE, sizeof(cp), &cp);
363 void hci_le_start_enc(struct hci_conn *conn, __le16 ediv, __le64 rand,
364 __u8 ltk[16], __u8 key_size)
366 struct hci_dev *hdev = conn->hdev;
367 struct hci_cp_le_start_enc cp;
369 BT_DBG("hcon %p", conn);
371 memset(&cp, 0, sizeof(cp));
373 cp.handle = cpu_to_le16(conn->handle);
376 memcpy(cp.ltk, ltk, key_size);
378 hci_send_cmd(hdev, HCI_OP_LE_START_ENC, sizeof(cp), &cp);
381 /* Device _must_ be locked */
382 void hci_sco_setup(struct hci_conn *conn, __u8 status)
384 struct hci_conn *sco = conn->link;
389 BT_DBG("hcon %p", conn);
392 if (lmp_esco_capable(conn->hdev))
393 hci_setup_sync(sco, conn->handle);
395 hci_add_sco(sco, conn->handle);
397 hci_connect_cfm(sco, status);
402 static void hci_conn_timeout(struct work_struct *work)
404 struct hci_conn *conn = container_of(work, struct hci_conn,
406 int refcnt = atomic_read(&conn->refcnt);
408 BT_DBG("hcon %p state %s", conn, state_to_string(conn->state));
412 /* FIXME: It was observed that in pairing failed scenario, refcnt
413 * drops below 0. Probably this is because l2cap_conn_del calls
414 * l2cap_chan_del for each channel, and inside l2cap_chan_del conn is
415 * dropped. After that loop hci_chan_del is called which also drops
416 * conn. For now make sure that ACL is alive if refcnt is higher then 0,
422 /* LE connections in scanning state need special handling */
423 if (conn->state == BT_CONNECT && conn->type == LE_LINK &&
424 test_bit(HCI_CONN_SCANNING, &conn->flags)) {
425 hci_connect_le_scan_remove(conn);
429 hci_abort_conn(conn, hci_proto_disconn_ind(conn));
432 /* Enter sniff mode */
433 static void hci_conn_idle(struct work_struct *work)
435 struct hci_conn *conn = container_of(work, struct hci_conn,
437 struct hci_dev *hdev = conn->hdev;
439 BT_DBG("hcon %p mode %d", conn, conn->mode);
441 if (!lmp_sniff_capable(hdev) || !lmp_sniff_capable(conn))
444 if (conn->mode != HCI_CM_ACTIVE || !(conn->link_policy & HCI_LP_SNIFF))
447 if (lmp_sniffsubr_capable(hdev) && lmp_sniffsubr_capable(conn)) {
448 struct hci_cp_sniff_subrate cp;
449 cp.handle = cpu_to_le16(conn->handle);
450 cp.max_latency = cpu_to_le16(0);
451 cp.min_remote_timeout = cpu_to_le16(0);
452 cp.min_local_timeout = cpu_to_le16(0);
453 hci_send_cmd(hdev, HCI_OP_SNIFF_SUBRATE, sizeof(cp), &cp);
456 if (!test_and_set_bit(HCI_CONN_MODE_CHANGE_PEND, &conn->flags)) {
457 struct hci_cp_sniff_mode cp;
458 cp.handle = cpu_to_le16(conn->handle);
459 cp.max_interval = cpu_to_le16(hdev->sniff_max_interval);
460 cp.min_interval = cpu_to_le16(hdev->sniff_min_interval);
461 cp.attempt = cpu_to_le16(4);
462 cp.timeout = cpu_to_le16(1);
463 hci_send_cmd(hdev, HCI_OP_SNIFF_MODE, sizeof(cp), &cp);
467 static void hci_conn_auto_accept(struct work_struct *work)
469 struct hci_conn *conn = container_of(work, struct hci_conn,
470 auto_accept_work.work);
472 hci_send_cmd(conn->hdev, HCI_OP_USER_CONFIRM_REPLY, sizeof(conn->dst),
476 static void le_disable_advertising(struct hci_dev *hdev)
478 if (ext_adv_capable(hdev)) {
479 struct hci_cp_le_set_ext_adv_enable cp;
482 cp.num_of_sets = 0x00;
484 hci_send_cmd(hdev, HCI_OP_LE_SET_EXT_ADV_ENABLE, sizeof(cp),
488 hci_send_cmd(hdev, HCI_OP_LE_SET_ADV_ENABLE, sizeof(enable),
493 static void le_conn_timeout(struct work_struct *work)
495 struct hci_conn *conn = container_of(work, struct hci_conn,
496 le_conn_timeout.work);
497 struct hci_dev *hdev = conn->hdev;
501 /* We could end up here due to having done directed advertising,
502 * so clean up the state if necessary. This should however only
503 * happen with broken hardware or if low duty cycle was used
504 * (which doesn't have a timeout of its own).
506 if (conn->role == HCI_ROLE_SLAVE) {
507 /* Disable LE Advertising */
508 le_disable_advertising(hdev);
510 hci_le_conn_failed(conn, HCI_ERROR_ADVERTISING_TIMEOUT);
511 hci_dev_unlock(hdev);
515 hci_abort_conn(conn, HCI_ERROR_REMOTE_USER_TERM);
518 struct hci_conn *hci_conn_add(struct hci_dev *hdev, int type, bdaddr_t *dst,
521 struct hci_conn *conn;
523 BT_DBG("%s dst %pMR", hdev->name, dst);
525 conn = kzalloc(sizeof(*conn), GFP_KERNEL);
529 bacpy(&conn->dst, dst);
530 bacpy(&conn->src, &hdev->bdaddr);
534 conn->mode = HCI_CM_ACTIVE;
535 conn->state = BT_OPEN;
536 conn->auth_type = HCI_AT_GENERAL_BONDING;
537 conn->io_capability = hdev->io_capability;
538 conn->remote_auth = 0xff;
539 conn->key_type = 0xff;
540 conn->rssi = HCI_RSSI_INVALID;
541 conn->tx_power = HCI_TX_POWER_INVALID;
542 conn->max_tx_power = HCI_TX_POWER_INVALID;
544 set_bit(HCI_CONN_POWER_SAVE, &conn->flags);
545 conn->disc_timeout = HCI_DISCONN_TIMEOUT;
547 /* Set Default Authenticated payload timeout to 30s */
548 conn->auth_payload_timeout = DEFAULT_AUTH_PAYLOAD_TIMEOUT;
550 if (conn->role == HCI_ROLE_MASTER)
555 conn->pkt_type = hdev->pkt_type & ACL_PTYPE_MASK;
558 /* conn->src should reflect the local identity address */
559 hci_copy_identity_address(hdev, &conn->src, &conn->src_type);
562 if (lmp_esco_capable(hdev))
563 conn->pkt_type = (hdev->esco_type & SCO_ESCO_MASK) |
564 (hdev->esco_type & EDR_ESCO_MASK);
566 conn->pkt_type = hdev->pkt_type & SCO_PTYPE_MASK;
569 conn->pkt_type = hdev->esco_type & ~EDR_ESCO_MASK;
573 skb_queue_head_init(&conn->data_q);
575 INIT_LIST_HEAD(&conn->chan_list);
577 INIT_DELAYED_WORK(&conn->disc_work, hci_conn_timeout);
578 INIT_DELAYED_WORK(&conn->auto_accept_work, hci_conn_auto_accept);
579 INIT_DELAYED_WORK(&conn->idle_work, hci_conn_idle);
580 INIT_DELAYED_WORK(&conn->le_conn_timeout, le_conn_timeout);
581 INIT_WORK(&conn->le_scan_cleanup, le_scan_cleanup);
583 atomic_set(&conn->refcnt, 0);
587 hci_conn_hash_add(hdev, conn);
589 /* The SCO and eSCO connections will only be notified when their
590 * setup has been completed. This is different to ACL links which
591 * can be notified right away.
593 if (conn->type != SCO_LINK && conn->type != ESCO_LINK) {
595 hdev->notify(hdev, HCI_NOTIFY_CONN_ADD);
598 hci_conn_init_sysfs(conn);
603 int hci_conn_del(struct hci_conn *conn)
605 struct hci_dev *hdev = conn->hdev;
607 BT_DBG("%s hcon %p handle %d", hdev->name, conn, conn->handle);
609 cancel_delayed_work_sync(&conn->disc_work);
610 cancel_delayed_work_sync(&conn->auto_accept_work);
611 cancel_delayed_work_sync(&conn->idle_work);
613 if (conn->type == ACL_LINK) {
614 struct hci_conn *sco = conn->link;
619 hdev->acl_cnt += conn->sent;
620 } else if (conn->type == LE_LINK) {
621 cancel_delayed_work(&conn->le_conn_timeout);
624 hdev->le_cnt += conn->sent;
626 hdev->acl_cnt += conn->sent;
628 struct hci_conn *acl = conn->link;
636 amp_mgr_put(conn->amp_mgr);
638 skb_queue_purge(&conn->data_q);
640 /* Remove the connection from the list and cleanup its remaining
641 * state. This is a separate function since for some cases like
642 * BT_CONNECT_SCAN we *only* want the cleanup part without the
643 * rest of hci_conn_del.
645 hci_conn_cleanup(conn);
650 struct hci_dev *hci_get_route(bdaddr_t *dst, bdaddr_t *src, uint8_t src_type)
652 int use_src = bacmp(src, BDADDR_ANY);
653 struct hci_dev *hdev = NULL, *d;
655 BT_DBG("%pMR -> %pMR", src, dst);
657 read_lock(&hci_dev_list_lock);
659 list_for_each_entry(d, &hci_dev_list, list) {
660 if (!test_bit(HCI_UP, &d->flags) ||
661 hci_dev_test_flag(d, HCI_USER_CHANNEL) ||
662 d->dev_type != HCI_PRIMARY)
666 * No source address - find interface with bdaddr != dst
667 * Source address - find interface with bdaddr == src
674 if (src_type == BDADDR_BREDR) {
675 if (!lmp_bredr_capable(d))
677 bacpy(&id_addr, &d->bdaddr);
678 id_addr_type = BDADDR_BREDR;
680 if (!lmp_le_capable(d))
683 hci_copy_identity_address(d, &id_addr,
686 /* Convert from HCI to three-value type */
687 if (id_addr_type == ADDR_LE_DEV_PUBLIC)
688 id_addr_type = BDADDR_LE_PUBLIC;
690 id_addr_type = BDADDR_LE_RANDOM;
693 if (!bacmp(&id_addr, src) && id_addr_type == src_type) {
697 if (bacmp(&d->bdaddr, dst)) {
704 hdev = hci_dev_hold(hdev);
706 read_unlock(&hci_dev_list_lock);
709 EXPORT_SYMBOL(hci_get_route);
711 /* This function requires the caller holds hdev->lock */
712 void hci_le_conn_failed(struct hci_conn *conn, u8 status)
714 struct hci_dev *hdev = conn->hdev;
715 struct hci_conn_params *params;
717 params = hci_pend_le_action_lookup(&hdev->pend_le_conns, &conn->dst,
719 if (params && params->conn) {
720 hci_conn_drop(params->conn);
721 hci_conn_put(params->conn);
725 conn->state = BT_CLOSED;
727 /* If the status indicates successful cancellation of
728 * the attempt (i.e. Unkown Connection Id) there's no point of
729 * notifying failure since we'll go back to keep trying to
730 * connect. The only exception is explicit connect requests
731 * where a timeout + cancel does indicate an actual failure.
733 if (status != HCI_ERROR_UNKNOWN_CONN_ID ||
734 (params && params->explicit_connect))
735 mgmt_connect_failed(hdev, &conn->dst, conn->type,
736 conn->dst_type, status);
738 hci_connect_cfm(conn, status);
742 /* Since we may have temporarily stopped the background scanning in
743 * favor of connection establishment, we should restart it.
745 hci_update_background_scan(hdev);
747 /* Re-enable advertising in case this was a failed connection
748 * attempt as a peripheral.
750 hci_req_reenable_advertising(hdev);
753 static void create_le_conn_complete(struct hci_dev *hdev, u8 status, u16 opcode)
755 struct hci_conn *conn;
759 conn = hci_lookup_le_connect(hdev);
762 hci_connect_le_scan_cleanup(conn);
766 bt_dev_err(hdev, "request failed to create LE connection: "
767 "status 0x%2.2x", status);
772 hci_le_conn_failed(conn, status);
775 hci_dev_unlock(hdev);
778 static bool conn_use_rpa(struct hci_conn *conn)
780 struct hci_dev *hdev = conn->hdev;
782 return hci_dev_test_flag(hdev, HCI_PRIVACY);
785 static void set_ext_conn_params(struct hci_conn *conn,
786 struct hci_cp_le_ext_conn_param *p)
788 struct hci_dev *hdev = conn->hdev;
790 memset(p, 0, sizeof(*p));
792 p->scan_interval = cpu_to_le16(hdev->le_scan_int_connect);
793 p->scan_window = cpu_to_le16(hdev->le_scan_window_connect);
794 p->conn_interval_min = cpu_to_le16(conn->le_conn_min_interval);
795 p->conn_interval_max = cpu_to_le16(conn->le_conn_max_interval);
796 p->conn_latency = cpu_to_le16(conn->le_conn_latency);
797 p->supervision_timeout = cpu_to_le16(conn->le_supv_timeout);
798 p->min_ce_len = cpu_to_le16(0x0000);
799 p->max_ce_len = cpu_to_le16(0x0000);
802 static void hci_req_add_le_create_conn(struct hci_request *req,
803 struct hci_conn *conn,
804 bdaddr_t *direct_rpa)
806 struct hci_dev *hdev = conn->hdev;
809 /* If direct address was provided we use it instead of current
813 if (bacmp(&req->hdev->random_addr, direct_rpa))
814 hci_req_add(req, HCI_OP_LE_SET_RANDOM_ADDR, 6,
817 /* direct address is always RPA */
818 own_addr_type = ADDR_LE_DEV_RANDOM;
820 /* Update random address, but set require_privacy to false so
821 * that we never connect with an non-resolvable address.
823 if (hci_update_random_address(req, false, conn_use_rpa(conn),
828 if (use_ext_conn(hdev)) {
829 struct hci_cp_le_ext_create_conn *cp;
830 struct hci_cp_le_ext_conn_param *p;
831 u8 data[sizeof(*cp) + sizeof(*p) * 3];
835 p = (void *) cp->data;
837 memset(cp, 0, sizeof(*cp));
839 bacpy(&cp->peer_addr, &conn->dst);
840 cp->peer_addr_type = conn->dst_type;
841 cp->own_addr_type = own_addr_type;
846 cp->phys |= LE_SCAN_PHY_1M;
847 set_ext_conn_params(conn, p);
854 cp->phys |= LE_SCAN_PHY_2M;
855 set_ext_conn_params(conn, p);
861 if (scan_coded(hdev)) {
862 cp->phys |= LE_SCAN_PHY_CODED;
863 set_ext_conn_params(conn, p);
868 hci_req_add(req, HCI_OP_LE_EXT_CREATE_CONN, plen, data);
871 struct hci_cp_le_create_conn cp;
873 memset(&cp, 0, sizeof(cp));
875 cp.scan_interval = cpu_to_le16(hdev->le_scan_int_connect);
876 cp.scan_window = cpu_to_le16(hdev->le_scan_window_connect);
878 bacpy(&cp.peer_addr, &conn->dst);
879 cp.peer_addr_type = conn->dst_type;
880 cp.own_address_type = own_addr_type;
881 cp.conn_interval_min = cpu_to_le16(conn->le_conn_min_interval);
882 cp.conn_interval_max = cpu_to_le16(conn->le_conn_max_interval);
883 cp.conn_latency = cpu_to_le16(conn->le_conn_latency);
884 cp.supervision_timeout = cpu_to_le16(conn->le_supv_timeout);
885 cp.min_ce_len = cpu_to_le16(0x0000);
886 cp.max_ce_len = cpu_to_le16(0x0000);
888 hci_req_add(req, HCI_OP_LE_CREATE_CONN, sizeof(cp), &cp);
891 conn->state = BT_CONNECT;
892 clear_bit(HCI_CONN_SCANNING, &conn->flags);
895 static void hci_req_directed_advertising(struct hci_request *req,
896 struct hci_conn *conn)
898 struct hci_dev *hdev = req->hdev;
902 if (ext_adv_capable(hdev)) {
903 struct hci_cp_le_set_ext_adv_params cp;
904 bdaddr_t random_addr;
906 /* Set require_privacy to false so that the remote device has a
907 * chance of identifying us.
909 if (hci_get_random_address(hdev, false, conn_use_rpa(conn), NULL,
910 &own_addr_type, &random_addr) < 0)
913 memset(&cp, 0, sizeof(cp));
915 cp.evt_properties = cpu_to_le16(LE_LEGACY_ADV_DIRECT_IND);
916 cp.own_addr_type = own_addr_type;
917 cp.channel_map = hdev->le_adv_channel_map;
918 cp.tx_power = HCI_TX_POWER_INVALID;
919 cp.primary_phy = HCI_ADV_PHY_1M;
920 cp.secondary_phy = HCI_ADV_PHY_1M;
921 cp.handle = 0; /* Use instance 0 for directed adv */
922 cp.own_addr_type = own_addr_type;
923 cp.peer_addr_type = conn->dst_type;
924 bacpy(&cp.peer_addr, &conn->dst);
926 /* As per Core Spec 5.2 Vol 2, PART E, Sec 7.8.53, for
927 * advertising_event_property LE_LEGACY_ADV_DIRECT_IND
928 * does not supports advertising data when the advertising set already
929 * contains some, the controller shall return erroc code 'Invalid
930 * HCI Command Parameters(0x12).
931 * So it is required to remove adv set for handle 0x00. since we use
932 * instance 0 for directed adv.
934 __hci_req_remove_ext_adv_instance(req, cp.handle);
936 hci_req_add(req, HCI_OP_LE_SET_EXT_ADV_PARAMS, sizeof(cp), &cp);
938 if (own_addr_type == ADDR_LE_DEV_RANDOM &&
939 bacmp(&random_addr, BDADDR_ANY) &&
940 bacmp(&random_addr, &hdev->random_addr)) {
941 struct hci_cp_le_set_adv_set_rand_addr cp;
943 memset(&cp, 0, sizeof(cp));
946 bacpy(&cp.bdaddr, &random_addr);
949 HCI_OP_LE_SET_ADV_SET_RAND_ADDR,
953 __hci_req_enable_ext_advertising(req, 0x00);
955 struct hci_cp_le_set_adv_param cp;
957 /* Clear the HCI_LE_ADV bit temporarily so that the
958 * hci_update_random_address knows that it's safe to go ahead
959 * and write a new random address. The flag will be set back on
960 * as soon as the SET_ADV_ENABLE HCI command completes.
962 hci_dev_clear_flag(hdev, HCI_LE_ADV);
964 /* Set require_privacy to false so that the remote device has a
965 * chance of identifying us.
967 if (hci_update_random_address(req, false, conn_use_rpa(conn),
971 memset(&cp, 0, sizeof(cp));
973 /* Some controllers might reject command if intervals are not
974 * within range for undirected advertising.
975 * BCM20702A0 is known to be affected by this.
977 cp.min_interval = cpu_to_le16(0x0020);
978 cp.max_interval = cpu_to_le16(0x0020);
980 cp.type = LE_ADV_DIRECT_IND;
981 cp.own_address_type = own_addr_type;
982 cp.direct_addr_type = conn->dst_type;
983 bacpy(&cp.direct_addr, &conn->dst);
984 cp.channel_map = hdev->le_adv_channel_map;
986 hci_req_add(req, HCI_OP_LE_SET_ADV_PARAM, sizeof(cp), &cp);
989 hci_req_add(req, HCI_OP_LE_SET_ADV_ENABLE, sizeof(enable),
993 conn->state = BT_CONNECT;
996 struct hci_conn *hci_connect_le(struct hci_dev *hdev, bdaddr_t *dst,
997 u8 dst_type, u8 sec_level, u16 conn_timeout,
998 u8 role, bdaddr_t *direct_rpa)
1000 struct hci_conn_params *params;
1001 struct hci_conn *conn;
1002 struct smp_irk *irk;
1003 struct hci_request req;
1006 /* This ensures that during disable le_scan address resolution
1007 * will not be disabled if it is followed by le_create_conn
1009 bool rpa_le_conn = true;
1011 /* Let's make sure that le is enabled.*/
1012 if (!hci_dev_test_flag(hdev, HCI_LE_ENABLED)) {
1013 if (lmp_le_capable(hdev))
1014 return ERR_PTR(-ECONNREFUSED);
1016 return ERR_PTR(-EOPNOTSUPP);
1019 /* Since the controller supports only one LE connection attempt at a
1020 * time, we return -EBUSY if there is any connection attempt running.
1022 if (hci_lookup_le_connect(hdev))
1023 return ERR_PTR(-EBUSY);
1025 /* If there's already a connection object but it's not in
1026 * scanning state it means it must already be established, in
1027 * which case we can't do anything else except report a failure
1030 conn = hci_conn_hash_lookup_le(hdev, dst, dst_type);
1031 if (conn && !test_bit(HCI_CONN_SCANNING, &conn->flags)) {
1032 return ERR_PTR(-EBUSY);
1035 /* When given an identity address with existing identity
1036 * resolving key, the connection needs to be established
1037 * to a resolvable random address.
1039 * Storing the resolvable random address is required here
1040 * to handle connection failures. The address will later
1041 * be resolved back into the original identity address
1042 * from the connect request.
1044 irk = hci_find_irk_by_addr(hdev, dst, dst_type);
1045 if (irk && bacmp(&irk->rpa, BDADDR_ANY)) {
1047 dst_type = ADDR_LE_DEV_RANDOM;
1051 bacpy(&conn->dst, dst);
1053 conn = hci_conn_add(hdev, LE_LINK, dst, role);
1055 return ERR_PTR(-ENOMEM);
1056 hci_conn_hold(conn);
1057 conn->pending_sec_level = sec_level;
1060 conn->dst_type = dst_type;
1061 conn->sec_level = BT_SECURITY_LOW;
1062 conn->conn_timeout = conn_timeout;
1064 hci_req_init(&req, hdev);
1066 /* Disable advertising if we're active. For central role
1067 * connections most controllers will refuse to connect if
1068 * advertising is enabled, and for peripheral role connections we
1069 * anyway have to disable it in order to start directed
1072 if (hci_dev_test_flag(hdev, HCI_LE_ADV))
1073 __hci_req_disable_advertising(&req);
1075 /* If requested to connect as peripheral use directed advertising */
1076 if (conn->role == HCI_ROLE_SLAVE) {
1077 /* If we're active scanning most controllers are unable
1078 * to initiate advertising. Simply reject the attempt.
1080 if (hci_dev_test_flag(hdev, HCI_LE_SCAN) &&
1081 hdev->le_scan_type == LE_SCAN_ACTIVE) {
1082 hci_req_purge(&req);
1084 return ERR_PTR(-EBUSY);
1087 hci_req_directed_advertising(&req, conn);
1091 params = hci_conn_params_lookup(hdev, &conn->dst, conn->dst_type);
1093 conn->le_conn_min_interval = params->conn_min_interval;
1094 conn->le_conn_max_interval = params->conn_max_interval;
1095 conn->le_conn_latency = params->conn_latency;
1096 conn->le_supv_timeout = params->supervision_timeout;
1098 conn->le_conn_min_interval = hdev->le_conn_min_interval;
1099 conn->le_conn_max_interval = hdev->le_conn_max_interval;
1100 conn->le_conn_latency = hdev->le_conn_latency;
1101 conn->le_supv_timeout = hdev->le_supv_timeout;
1104 /* If controller is scanning, we stop it since some controllers are
1105 * not able to scan and connect at the same time. Also set the
1106 * HCI_LE_SCAN_INTERRUPTED flag so that the command complete
1107 * handler for scan disabling knows to set the correct discovery
1110 if (hci_dev_test_flag(hdev, HCI_LE_SCAN)) {
1111 hci_req_add_le_scan_disable(&req, rpa_le_conn);
1112 hci_dev_set_flag(hdev, HCI_LE_SCAN_INTERRUPTED);
1115 hci_req_add_le_create_conn(&req, conn, direct_rpa);
1118 err = hci_req_run(&req, create_le_conn_complete);
1121 return ERR_PTR(err);
1127 static bool is_connected(struct hci_dev *hdev, bdaddr_t *addr, u8 type)
1129 struct hci_conn *conn;
1131 conn = hci_conn_hash_lookup_le(hdev, addr, type);
1135 if (conn->state != BT_CONNECTED)
1141 /* This function requires the caller holds hdev->lock */
1142 static int hci_explicit_conn_params_set(struct hci_dev *hdev,
1143 bdaddr_t *addr, u8 addr_type)
1145 struct hci_conn_params *params;
1147 if (is_connected(hdev, addr, addr_type))
1150 params = hci_conn_params_lookup(hdev, addr, addr_type);
1152 params = hci_conn_params_add(hdev, addr, addr_type);
1156 /* If we created new params, mark them to be deleted in
1157 * hci_connect_le_scan_cleanup. It's different case than
1158 * existing disabled params, those will stay after cleanup.
1160 params->auto_connect = HCI_AUTO_CONN_EXPLICIT;
1163 /* We're trying to connect, so make sure params are at pend_le_conns */
1164 if (params->auto_connect == HCI_AUTO_CONN_DISABLED ||
1165 params->auto_connect == HCI_AUTO_CONN_REPORT ||
1166 params->auto_connect == HCI_AUTO_CONN_EXPLICIT) {
1167 list_del_init(¶ms->action);
1168 list_add(¶ms->action, &hdev->pend_le_conns);
1171 params->explicit_connect = true;
1173 BT_DBG("addr %pMR (type %u) auto_connect %u", addr, addr_type,
1174 params->auto_connect);
1179 /* This function requires the caller holds hdev->lock */
1180 struct hci_conn *hci_connect_le_scan(struct hci_dev *hdev, bdaddr_t *dst,
1181 u8 dst_type, u8 sec_level,
1183 enum conn_reasons conn_reason)
1185 struct hci_conn *conn;
1187 /* Let's make sure that le is enabled.*/
1188 if (!hci_dev_test_flag(hdev, HCI_LE_ENABLED)) {
1189 if (lmp_le_capable(hdev))
1190 return ERR_PTR(-ECONNREFUSED);
1192 return ERR_PTR(-EOPNOTSUPP);
1195 /* Some devices send ATT messages as soon as the physical link is
1196 * established. To be able to handle these ATT messages, the user-
1197 * space first establishes the connection and then starts the pairing
1200 * So if a hci_conn object already exists for the following connection
1201 * attempt, we simply update pending_sec_level and auth_type fields
1202 * and return the object found.
1204 conn = hci_conn_hash_lookup_le(hdev, dst, dst_type);
1206 if (conn->pending_sec_level < sec_level)
1207 conn->pending_sec_level = sec_level;
1211 BT_DBG("requesting refresh of dst_addr");
1213 conn = hci_conn_add(hdev, LE_LINK, dst, HCI_ROLE_MASTER);
1215 return ERR_PTR(-ENOMEM);
1217 if (hci_explicit_conn_params_set(hdev, dst, dst_type) < 0) {
1219 return ERR_PTR(-EBUSY);
1222 conn->state = BT_CONNECT;
1223 set_bit(HCI_CONN_SCANNING, &conn->flags);
1224 conn->dst_type = dst_type;
1225 conn->sec_level = BT_SECURITY_LOW;
1226 conn->pending_sec_level = sec_level;
1227 conn->conn_timeout = conn_timeout;
1228 conn->conn_reason = conn_reason;
1230 hci_update_background_scan(hdev);
1233 hci_conn_hold(conn);
1237 struct hci_conn *hci_connect_acl(struct hci_dev *hdev, bdaddr_t *dst,
1238 u8 sec_level, u8 auth_type,
1239 enum conn_reasons conn_reason)
1241 struct hci_conn *acl;
1243 if (!hci_dev_test_flag(hdev, HCI_BREDR_ENABLED)) {
1244 if (lmp_bredr_capable(hdev))
1245 return ERR_PTR(-ECONNREFUSED);
1247 return ERR_PTR(-EOPNOTSUPP);
1250 /* Reject outgoing connection to device with same BD ADDR against
1253 if (!bacmp(&hdev->bdaddr, dst)) {
1254 bt_dev_dbg(hdev, "Reject connection with same BD_ADDR %pMR\n",
1256 return ERR_PTR(-ECONNREFUSED);
1259 acl = hci_conn_hash_lookup_ba(hdev, ACL_LINK, dst);
1261 acl = hci_conn_add(hdev, ACL_LINK, dst, HCI_ROLE_MASTER);
1263 return ERR_PTR(-ENOMEM);
1268 acl->conn_reason = conn_reason;
1269 if (acl->state == BT_OPEN || acl->state == BT_CLOSED) {
1270 acl->sec_level = BT_SECURITY_LOW;
1271 acl->pending_sec_level = sec_level;
1272 acl->auth_type = auth_type;
1273 hci_acl_create_connection(acl);
1279 struct hci_conn *hci_connect_sco(struct hci_dev *hdev, int type, bdaddr_t *dst,
1282 struct hci_conn *acl;
1283 struct hci_conn *sco;
1285 acl = hci_connect_acl(hdev, dst, BT_SECURITY_LOW, HCI_AT_NO_BONDING,
1286 CONN_REASON_SCO_CONNECT);
1290 sco = hci_conn_hash_lookup_ba(hdev, type, dst);
1292 sco = hci_conn_add(hdev, type, dst, HCI_ROLE_MASTER);
1295 return ERR_PTR(-ENOMEM);
1304 sco->setting = setting;
1306 if (acl->state == BT_CONNECTED &&
1307 (sco->state == BT_OPEN || sco->state == BT_CLOSED)) {
1308 set_bit(HCI_CONN_POWER_SAVE, &acl->flags);
1309 hci_conn_enter_active_mode(acl, BT_POWER_FORCE_ACTIVE_ON);
1311 if (test_bit(HCI_CONN_MODE_CHANGE_PEND, &acl->flags)) {
1312 /* defer SCO setup until mode change completed */
1313 set_bit(HCI_CONN_SCO_SETUP_PEND, &acl->flags);
1317 hci_sco_setup(acl, 0x00);
1323 /* Check link security requirement */
1324 int hci_conn_check_link_mode(struct hci_conn *conn)
1326 BT_DBG("hcon %p", conn);
1328 /* In Secure Connections Only mode, it is required that Secure
1329 * Connections is used and the link is encrypted with AES-CCM
1330 * using a P-256 authenticated combination key.
1332 if (hci_dev_test_flag(conn->hdev, HCI_SC_ONLY)) {
1333 if (!hci_conn_sc_enabled(conn) ||
1334 !test_bit(HCI_CONN_AES_CCM, &conn->flags) ||
1335 conn->key_type != HCI_LK_AUTH_COMBINATION_P256)
1339 /* AES encryption is required for Level 4:
1341 * BLUETOOTH CORE SPECIFICATION Version 5.2 | Vol 3, Part C
1344 * 128-bit equivalent strength for link and encryption keys
1345 * required using FIPS approved algorithms (E0 not allowed,
1346 * SAFER+ not allowed, and P-192 not allowed; encryption key
1349 if (conn->sec_level == BT_SECURITY_FIPS &&
1350 !test_bit(HCI_CONN_AES_CCM, &conn->flags)) {
1351 bt_dev_err(conn->hdev,
1352 "Invalid security: Missing AES-CCM usage");
1356 if (hci_conn_ssp_enabled(conn) &&
1357 !test_bit(HCI_CONN_ENCRYPT, &conn->flags))
1363 /* Authenticate remote device */
1364 static int hci_conn_auth(struct hci_conn *conn, __u8 sec_level, __u8 auth_type)
1366 BT_DBG("hcon %p", conn);
1368 if (conn->pending_sec_level > sec_level)
1369 sec_level = conn->pending_sec_level;
1371 if (sec_level > conn->sec_level)
1372 conn->pending_sec_level = sec_level;
1373 else if (test_bit(HCI_CONN_AUTH, &conn->flags))
1376 /* Make sure we preserve an existing MITM requirement*/
1377 auth_type |= (conn->auth_type & 0x01);
1379 conn->auth_type = auth_type;
1381 if (!test_and_set_bit(HCI_CONN_AUTH_PEND, &conn->flags)) {
1382 struct hci_cp_auth_requested cp;
1384 cp.handle = cpu_to_le16(conn->handle);
1385 hci_send_cmd(conn->hdev, HCI_OP_AUTH_REQUESTED,
1388 /* Set the ENCRYPT_PEND to trigger encryption after
1391 if (!test_bit(HCI_CONN_ENCRYPT, &conn->flags))
1392 set_bit(HCI_CONN_ENCRYPT_PEND, &conn->flags);
1398 /* Encrypt the link */
1399 static void hci_conn_encrypt(struct hci_conn *conn)
1401 BT_DBG("hcon %p", conn);
1403 if (!test_and_set_bit(HCI_CONN_ENCRYPT_PEND, &conn->flags)) {
1404 struct hci_cp_set_conn_encrypt cp;
1405 cp.handle = cpu_to_le16(conn->handle);
1407 hci_send_cmd(conn->hdev, HCI_OP_SET_CONN_ENCRYPT, sizeof(cp),
1412 /* Enable security */
1413 int hci_conn_security(struct hci_conn *conn, __u8 sec_level, __u8 auth_type,
1416 BT_DBG("hcon %p", conn);
1418 if (conn->type == LE_LINK)
1419 return smp_conn_security(conn, sec_level);
1421 /* For sdp we don't need the link key. */
1422 if (sec_level == BT_SECURITY_SDP)
1425 /* For non 2.1 devices and low security level we don't need the link
1427 if (sec_level == BT_SECURITY_LOW && !hci_conn_ssp_enabled(conn))
1430 /* For other security levels we need the link key. */
1431 if (!test_bit(HCI_CONN_AUTH, &conn->flags))
1434 switch (conn->key_type) {
1435 case HCI_LK_AUTH_COMBINATION_P256:
1436 /* An authenticated FIPS approved combination key has
1437 * sufficient security for security level 4 or lower.
1439 if (sec_level <= BT_SECURITY_FIPS)
1442 case HCI_LK_AUTH_COMBINATION_P192:
1443 /* An authenticated combination key has sufficient security for
1444 * security level 3 or lower.
1446 if (sec_level <= BT_SECURITY_HIGH)
1449 case HCI_LK_UNAUTH_COMBINATION_P192:
1450 case HCI_LK_UNAUTH_COMBINATION_P256:
1451 /* An unauthenticated combination key has sufficient security
1452 * for security level 2 or lower.
1454 if (sec_level <= BT_SECURITY_MEDIUM)
1457 case HCI_LK_COMBINATION:
1458 /* A combination key has always sufficient security for the
1459 * security levels 2 or lower. High security level requires the
1460 * combination key is generated using maximum PIN code length
1461 * (16). For pre 2.1 units.
1463 if (sec_level <= BT_SECURITY_MEDIUM || conn->pin_length == 16)
1471 if (test_bit(HCI_CONN_ENCRYPT_PEND, &conn->flags))
1475 set_bit(HCI_CONN_AUTH_INITIATOR, &conn->flags);
1477 if (!hci_conn_auth(conn, sec_level, auth_type))
1481 if (test_bit(HCI_CONN_ENCRYPT, &conn->flags)) {
1482 /* Ensure that the encryption key size has been read,
1483 * otherwise stall the upper layer responses.
1485 if (!conn->enc_key_size)
1488 /* Nothing else needed, all requirements are met */
1492 hci_conn_encrypt(conn);
1495 EXPORT_SYMBOL(hci_conn_security);
1497 /* Check secure link requirement */
1498 int hci_conn_check_secure(struct hci_conn *conn, __u8 sec_level)
1500 BT_DBG("hcon %p", conn);
1502 /* Accept if non-secure or higher security level is required */
1503 if (sec_level != BT_SECURITY_HIGH && sec_level != BT_SECURITY_FIPS)
1506 /* Accept if secure or higher security level is already present */
1507 if (conn->sec_level == BT_SECURITY_HIGH ||
1508 conn->sec_level == BT_SECURITY_FIPS)
1511 /* Reject not secure link */
1514 EXPORT_SYMBOL(hci_conn_check_secure);
1517 int hci_conn_switch_role(struct hci_conn *conn, __u8 role)
1519 BT_DBG("hcon %p", conn);
1521 if (role == conn->role)
1524 if (!test_and_set_bit(HCI_CONN_RSWITCH_PEND, &conn->flags)) {
1525 struct hci_cp_switch_role cp;
1526 bacpy(&cp.bdaddr, &conn->dst);
1528 hci_send_cmd(conn->hdev, HCI_OP_SWITCH_ROLE, sizeof(cp), &cp);
1533 EXPORT_SYMBOL(hci_conn_switch_role);
1535 /* Enter active mode */
1536 void hci_conn_enter_active_mode(struct hci_conn *conn, __u8 force_active)
1538 struct hci_dev *hdev = conn->hdev;
1540 BT_DBG("hcon %p mode %d", conn, conn->mode);
1542 if (conn->mode != HCI_CM_SNIFF)
1545 if (!test_bit(HCI_CONN_POWER_SAVE, &conn->flags) && !force_active)
1548 if (!test_and_set_bit(HCI_CONN_MODE_CHANGE_PEND, &conn->flags)) {
1549 struct hci_cp_exit_sniff_mode cp;
1550 cp.handle = cpu_to_le16(conn->handle);
1551 hci_send_cmd(hdev, HCI_OP_EXIT_SNIFF_MODE, sizeof(cp), &cp);
1555 if (hdev->idle_timeout > 0)
1556 queue_delayed_work(hdev->workqueue, &conn->idle_work,
1557 msecs_to_jiffies(hdev->idle_timeout));
1560 /* Drop all connection on the device */
1561 void hci_conn_hash_flush(struct hci_dev *hdev)
1563 struct hci_conn_hash *h = &hdev->conn_hash;
1564 struct hci_conn *c, *n;
1566 BT_DBG("hdev %s", hdev->name);
1568 list_for_each_entry_safe(c, n, &h->list, list) {
1569 c->state = BT_CLOSED;
1571 hci_disconn_cfm(c, HCI_ERROR_LOCAL_HOST_TERM);
1576 /* Check pending connect attempts */
1577 void hci_conn_check_pending(struct hci_dev *hdev)
1579 struct hci_conn *conn;
1581 BT_DBG("hdev %s", hdev->name);
1585 conn = hci_conn_hash_lookup_state(hdev, ACL_LINK, BT_CONNECT2);
1587 hci_acl_create_connection(conn);
1589 hci_dev_unlock(hdev);
1592 static u32 get_link_mode(struct hci_conn *conn)
1596 if (conn->role == HCI_ROLE_MASTER)
1597 link_mode |= HCI_LM_MASTER;
1599 if (test_bit(HCI_CONN_ENCRYPT, &conn->flags))
1600 link_mode |= HCI_LM_ENCRYPT;
1602 if (test_bit(HCI_CONN_AUTH, &conn->flags))
1603 link_mode |= HCI_LM_AUTH;
1605 if (test_bit(HCI_CONN_SECURE, &conn->flags))
1606 link_mode |= HCI_LM_SECURE;
1608 if (test_bit(HCI_CONN_FIPS, &conn->flags))
1609 link_mode |= HCI_LM_FIPS;
1614 int hci_get_conn_list(void __user *arg)
1617 struct hci_conn_list_req req, *cl;
1618 struct hci_conn_info *ci;
1619 struct hci_dev *hdev;
1620 int n = 0, size, err;
1622 if (copy_from_user(&req, arg, sizeof(req)))
1625 if (!req.conn_num || req.conn_num > (PAGE_SIZE * 2) / sizeof(*ci))
1628 size = sizeof(req) + req.conn_num * sizeof(*ci);
1630 cl = kmalloc(size, GFP_KERNEL);
1634 hdev = hci_dev_get(req.dev_id);
1643 list_for_each_entry(c, &hdev->conn_hash.list, list) {
1644 bacpy(&(ci + n)->bdaddr, &c->dst);
1645 (ci + n)->handle = c->handle;
1646 (ci + n)->type = c->type;
1647 (ci + n)->out = c->out;
1648 (ci + n)->state = c->state;
1649 (ci + n)->link_mode = get_link_mode(c);
1650 if (++n >= req.conn_num)
1653 hci_dev_unlock(hdev);
1655 cl->dev_id = hdev->id;
1657 size = sizeof(req) + n * sizeof(*ci);
1661 err = copy_to_user(arg, cl, size);
1664 return err ? -EFAULT : 0;
1667 int hci_get_conn_info(struct hci_dev *hdev, void __user *arg)
1669 struct hci_conn_info_req req;
1670 struct hci_conn_info ci;
1671 struct hci_conn *conn;
1672 char __user *ptr = arg + sizeof(req);
1674 if (copy_from_user(&req, arg, sizeof(req)))
1678 conn = hci_conn_hash_lookup_ba(hdev, req.type, &req.bdaddr);
1680 bacpy(&ci.bdaddr, &conn->dst);
1681 ci.handle = conn->handle;
1682 ci.type = conn->type;
1684 ci.state = conn->state;
1685 ci.link_mode = get_link_mode(conn);
1687 hci_dev_unlock(hdev);
1692 return copy_to_user(ptr, &ci, sizeof(ci)) ? -EFAULT : 0;
1695 int hci_get_auth_info(struct hci_dev *hdev, void __user *arg)
1697 struct hci_auth_info_req req;
1698 struct hci_conn *conn;
1700 if (copy_from_user(&req, arg, sizeof(req)))
1704 conn = hci_conn_hash_lookup_ba(hdev, ACL_LINK, &req.bdaddr);
1706 req.type = conn->auth_type;
1707 hci_dev_unlock(hdev);
1712 return copy_to_user(arg, &req, sizeof(req)) ? -EFAULT : 0;
1715 struct hci_chan *hci_chan_create(struct hci_conn *conn)
1717 struct hci_dev *hdev = conn->hdev;
1718 struct hci_chan *chan;
1720 BT_DBG("%s hcon %p", hdev->name, conn);
1722 if (test_bit(HCI_CONN_DROP, &conn->flags)) {
1723 BT_DBG("Refusing to create new hci_chan");
1727 chan = kzalloc(sizeof(*chan), GFP_KERNEL);
1731 chan->conn = hci_conn_get(conn);
1732 skb_queue_head_init(&chan->data_q);
1733 chan->state = BT_CONNECTED;
1735 list_add_rcu(&chan->list, &conn->chan_list);
1740 void hci_chan_del(struct hci_chan *chan)
1742 struct hci_conn *conn = chan->conn;
1743 struct hci_dev *hdev = conn->hdev;
1745 BT_DBG("%s hcon %p chan %p", hdev->name, conn, chan);
1747 list_del_rcu(&chan->list);
1751 /* Prevent new hci_chan's to be created for this hci_conn */
1752 set_bit(HCI_CONN_DROP, &conn->flags);
1756 skb_queue_purge(&chan->data_q);
1760 void hci_chan_list_flush(struct hci_conn *conn)
1762 struct hci_chan *chan, *n;
1764 BT_DBG("hcon %p", conn);
1766 list_for_each_entry_safe(chan, n, &conn->chan_list, list)
1770 static struct hci_chan *__hci_chan_lookup_handle(struct hci_conn *hcon,
1773 struct hci_chan *hchan;
1775 list_for_each_entry(hchan, &hcon->chan_list, list) {
1776 if (hchan->handle == handle)
1783 struct hci_chan *hci_chan_lookup_handle(struct hci_dev *hdev, __u16 handle)
1785 struct hci_conn_hash *h = &hdev->conn_hash;
1786 struct hci_conn *hcon;
1787 struct hci_chan *hchan = NULL;
1791 list_for_each_entry_rcu(hcon, &h->list, list) {
1792 hchan = __hci_chan_lookup_handle(hcon, handle);
1802 u32 hci_conn_get_phy(struct hci_conn *conn)
1806 /* BLUETOOTH CORE SPECIFICATION Version 5.2 | Vol 2, Part B page 471:
1807 * Table 6.2: Packets defined for synchronous, asynchronous, and
1808 * CSB logical transport types.
1810 switch (conn->type) {
1812 /* SCO logical transport (1 Mb/s):
1813 * HV1, HV2, HV3 and DV.
1815 phys |= BT_PHY_BR_1M_1SLOT;
1820 /* ACL logical transport (1 Mb/s) ptt=0:
1821 * DH1, DM3, DH3, DM5 and DH5.
1823 phys |= BT_PHY_BR_1M_1SLOT;
1825 if (conn->pkt_type & (HCI_DM3 | HCI_DH3))
1826 phys |= BT_PHY_BR_1M_3SLOT;
1828 if (conn->pkt_type & (HCI_DM5 | HCI_DH5))
1829 phys |= BT_PHY_BR_1M_5SLOT;
1831 /* ACL logical transport (2 Mb/s) ptt=1:
1832 * 2-DH1, 2-DH3 and 2-DH5.
1834 if (!(conn->pkt_type & HCI_2DH1))
1835 phys |= BT_PHY_EDR_2M_1SLOT;
1837 if (!(conn->pkt_type & HCI_2DH3))
1838 phys |= BT_PHY_EDR_2M_3SLOT;
1840 if (!(conn->pkt_type & HCI_2DH5))
1841 phys |= BT_PHY_EDR_2M_5SLOT;
1843 /* ACL logical transport (3 Mb/s) ptt=1:
1844 * 3-DH1, 3-DH3 and 3-DH5.
1846 if (!(conn->pkt_type & HCI_3DH1))
1847 phys |= BT_PHY_EDR_3M_1SLOT;
1849 if (!(conn->pkt_type & HCI_3DH3))
1850 phys |= BT_PHY_EDR_3M_3SLOT;
1852 if (!(conn->pkt_type & HCI_3DH5))
1853 phys |= BT_PHY_EDR_3M_5SLOT;
1858 /* eSCO logical transport (1 Mb/s): EV3, EV4 and EV5 */
1859 phys |= BT_PHY_BR_1M_1SLOT;
1861 if (!(conn->pkt_type & (ESCO_EV4 | ESCO_EV5)))
1862 phys |= BT_PHY_BR_1M_3SLOT;
1864 /* eSCO logical transport (2 Mb/s): 2-EV3, 2-EV5 */
1865 if (!(conn->pkt_type & ESCO_2EV3))
1866 phys |= BT_PHY_EDR_2M_1SLOT;
1868 if (!(conn->pkt_type & ESCO_2EV5))
1869 phys |= BT_PHY_EDR_2M_3SLOT;
1871 /* eSCO logical transport (3 Mb/s): 3-EV3, 3-EV5 */
1872 if (!(conn->pkt_type & ESCO_3EV3))
1873 phys |= BT_PHY_EDR_3M_1SLOT;
1875 if (!(conn->pkt_type & ESCO_3EV5))
1876 phys |= BT_PHY_EDR_3M_3SLOT;
1881 if (conn->le_tx_phy & HCI_LE_SET_PHY_1M)
1882 phys |= BT_PHY_LE_1M_TX;
1884 if (conn->le_rx_phy & HCI_LE_SET_PHY_1M)
1885 phys |= BT_PHY_LE_1M_RX;
1887 if (conn->le_tx_phy & HCI_LE_SET_PHY_2M)
1888 phys |= BT_PHY_LE_2M_TX;
1890 if (conn->le_rx_phy & HCI_LE_SET_PHY_2M)
1891 phys |= BT_PHY_LE_2M_RX;
1893 if (conn->le_tx_phy & HCI_LE_SET_PHY_CODED)
1894 phys |= BT_PHY_LE_CODED_TX;
1896 if (conn->le_rx_phy & HCI_LE_SET_PHY_CODED)
1897 phys |= BT_PHY_LE_CODED_RX;