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 hci_conn_del_sysfs(conn);
140 debugfs_remove_recursive(conn->debugfs);
147 static void le_scan_cleanup(struct work_struct *work)
149 struct hci_conn *conn = container_of(work, struct hci_conn,
151 struct hci_dev *hdev = conn->hdev;
152 struct hci_conn *c = NULL;
154 BT_DBG("%s hcon %p", hdev->name, conn);
158 /* Check that the hci_conn is still around */
160 list_for_each_entry_rcu(c, &hdev->conn_hash.list, list) {
167 hci_connect_le_scan_cleanup(conn);
168 hci_conn_cleanup(conn);
171 hci_dev_unlock(hdev);
176 static void hci_connect_le_scan_remove(struct hci_conn *conn)
178 BT_DBG("%s hcon %p", conn->hdev->name, conn);
180 /* We can't call hci_conn_del/hci_conn_cleanup here since that
181 * could deadlock with another hci_conn_del() call that's holding
182 * hci_dev_lock and doing cancel_delayed_work_sync(&conn->disc_work).
183 * Instead, grab temporary extra references to the hci_dev and
184 * hci_conn and perform the necessary cleanup in a separate work
188 hci_dev_hold(conn->hdev);
191 /* Even though we hold a reference to the hdev, many other
192 * things might get cleaned up meanwhile, including the hdev's
193 * own workqueue, so we can't use that for scheduling.
195 schedule_work(&conn->le_scan_cleanup);
198 static void hci_acl_create_connection(struct hci_conn *conn)
200 struct hci_dev *hdev = conn->hdev;
201 struct inquiry_entry *ie;
202 struct hci_cp_create_conn cp;
204 BT_DBG("hcon %p", conn);
206 conn->state = BT_CONNECT;
208 conn->role = HCI_ROLE_MASTER;
212 conn->link_policy = hdev->link_policy;
214 memset(&cp, 0, sizeof(cp));
215 bacpy(&cp.bdaddr, &conn->dst);
216 cp.pscan_rep_mode = 0x02;
218 ie = hci_inquiry_cache_lookup(hdev, &conn->dst);
220 if (inquiry_entry_age(ie) <= INQUIRY_ENTRY_AGE_MAX) {
221 cp.pscan_rep_mode = ie->data.pscan_rep_mode;
222 cp.pscan_mode = ie->data.pscan_mode;
223 cp.clock_offset = ie->data.clock_offset |
227 memcpy(conn->dev_class, ie->data.dev_class, 3);
230 cp.pkt_type = cpu_to_le16(conn->pkt_type);
231 if (lmp_rswitch_capable(hdev) && !(hdev->link_mode & HCI_LM_MASTER))
232 cp.role_switch = 0x01;
234 cp.role_switch = 0x00;
236 hci_send_cmd(hdev, HCI_OP_CREATE_CONN, sizeof(cp), &cp);
239 int hci_disconnect(struct hci_conn *conn, __u8 reason)
241 BT_DBG("hcon %p", conn);
243 /* When we are master of an established connection and it enters
244 * the disconnect timeout, then go ahead and try to read the
245 * current clock offset. Processing of the result is done
246 * within the event handling and hci_clock_offset_evt function.
248 if (conn->type == ACL_LINK && conn->role == HCI_ROLE_MASTER &&
249 (conn->state == BT_CONNECTED || conn->state == BT_CONFIG)) {
250 struct hci_dev *hdev = conn->hdev;
251 struct hci_cp_read_clock_offset clkoff_cp;
253 clkoff_cp.handle = cpu_to_le16(conn->handle);
254 hci_send_cmd(hdev, HCI_OP_READ_CLOCK_OFFSET, sizeof(clkoff_cp),
258 return hci_abort_conn(conn, reason);
261 static void hci_add_sco(struct hci_conn *conn, __u16 handle)
263 struct hci_dev *hdev = conn->hdev;
264 struct hci_cp_add_sco cp;
266 BT_DBG("hcon %p", conn);
268 conn->state = BT_CONNECT;
273 cp.handle = cpu_to_le16(handle);
274 cp.pkt_type = cpu_to_le16(conn->pkt_type);
276 hci_send_cmd(hdev, HCI_OP_ADD_SCO, sizeof(cp), &cp);
279 bool hci_setup_sync(struct hci_conn *conn, __u16 handle)
281 struct hci_dev *hdev = conn->hdev;
282 struct hci_cp_setup_sync_conn cp;
283 const struct sco_param *param;
285 BT_DBG("hcon %p", conn);
287 conn->state = BT_CONNECT;
292 cp.handle = cpu_to_le16(handle);
294 cp.tx_bandwidth = cpu_to_le32(0x00001f40);
295 cp.rx_bandwidth = cpu_to_le32(0x00001f40);
296 cp.voice_setting = cpu_to_le16(conn->setting);
298 switch (conn->setting & SCO_AIRMODE_MASK) {
299 case SCO_AIRMODE_TRANSP:
300 if (conn->attempt > ARRAY_SIZE(esco_param_msbc))
302 param = &esco_param_msbc[conn->attempt - 1];
304 case SCO_AIRMODE_CVSD:
305 if (lmp_esco_capable(conn->link)) {
306 if (conn->attempt > ARRAY_SIZE(esco_param_cvsd))
308 param = &esco_param_cvsd[conn->attempt - 1];
310 if (conn->attempt > ARRAY_SIZE(sco_param_cvsd))
312 param = &sco_param_cvsd[conn->attempt - 1];
319 cp.retrans_effort = param->retrans_effort;
320 cp.pkt_type = __cpu_to_le16(param->pkt_type);
321 cp.max_latency = __cpu_to_le16(param->max_latency);
323 if (hci_send_cmd(hdev, HCI_OP_SETUP_SYNC_CONN, sizeof(cp), &cp) < 0)
329 u8 hci_le_conn_update(struct hci_conn *conn, u16 min, u16 max, u16 latency,
332 struct hci_dev *hdev = conn->hdev;
333 struct hci_conn_params *params;
334 struct hci_cp_le_conn_update cp;
338 params = hci_conn_params_lookup(hdev, &conn->dst, conn->dst_type);
340 params->conn_min_interval = min;
341 params->conn_max_interval = max;
342 params->conn_latency = latency;
343 params->supervision_timeout = to_multiplier;
346 hci_dev_unlock(hdev);
348 memset(&cp, 0, sizeof(cp));
349 cp.handle = cpu_to_le16(conn->handle);
350 cp.conn_interval_min = cpu_to_le16(min);
351 cp.conn_interval_max = cpu_to_le16(max);
352 cp.conn_latency = cpu_to_le16(latency);
353 cp.supervision_timeout = cpu_to_le16(to_multiplier);
354 cp.min_ce_len = cpu_to_le16(0x0000);
355 cp.max_ce_len = cpu_to_le16(0x0000);
357 hci_send_cmd(hdev, HCI_OP_LE_CONN_UPDATE, sizeof(cp), &cp);
365 void hci_le_start_enc(struct hci_conn *conn, __le16 ediv, __le64 rand,
366 __u8 ltk[16], __u8 key_size)
368 struct hci_dev *hdev = conn->hdev;
369 struct hci_cp_le_start_enc cp;
371 BT_DBG("hcon %p", conn);
373 memset(&cp, 0, sizeof(cp));
375 cp.handle = cpu_to_le16(conn->handle);
378 memcpy(cp.ltk, ltk, key_size);
380 hci_send_cmd(hdev, HCI_OP_LE_START_ENC, sizeof(cp), &cp);
383 /* Device _must_ be locked */
384 void hci_sco_setup(struct hci_conn *conn, __u8 status)
386 struct hci_conn *sco = conn->link;
391 BT_DBG("hcon %p", conn);
394 if (lmp_esco_capable(conn->hdev))
395 hci_setup_sync(sco, conn->handle);
397 hci_add_sco(sco, conn->handle);
399 hci_connect_cfm(sco, status);
404 static void hci_conn_timeout(struct work_struct *work)
406 struct hci_conn *conn = container_of(work, struct hci_conn,
408 int refcnt = atomic_read(&conn->refcnt);
410 BT_DBG("hcon %p state %s", conn, state_to_string(conn->state));
414 /* FIXME: It was observed that in pairing failed scenario, refcnt
415 * drops below 0. Probably this is because l2cap_conn_del calls
416 * l2cap_chan_del for each channel, and inside l2cap_chan_del conn is
417 * dropped. After that loop hci_chan_del is called which also drops
418 * conn. For now make sure that ACL is alive if refcnt is higher then 0,
424 /* LE connections in scanning state need special handling */
425 if (conn->state == BT_CONNECT && conn->type == LE_LINK &&
426 test_bit(HCI_CONN_SCANNING, &conn->flags)) {
427 hci_connect_le_scan_remove(conn);
431 hci_abort_conn(conn, hci_proto_disconn_ind(conn));
434 /* Enter sniff mode */
435 static void hci_conn_idle(struct work_struct *work)
437 struct hci_conn *conn = container_of(work, struct hci_conn,
439 struct hci_dev *hdev = conn->hdev;
441 BT_DBG("hcon %p mode %d", conn, conn->mode);
443 if (!lmp_sniff_capable(hdev) || !lmp_sniff_capable(conn))
446 if (conn->mode != HCI_CM_ACTIVE || !(conn->link_policy & HCI_LP_SNIFF))
449 if (lmp_sniffsubr_capable(hdev) && lmp_sniffsubr_capable(conn)) {
450 struct hci_cp_sniff_subrate cp;
451 cp.handle = cpu_to_le16(conn->handle);
452 cp.max_latency = cpu_to_le16(0);
453 cp.min_remote_timeout = cpu_to_le16(0);
454 cp.min_local_timeout = cpu_to_le16(0);
455 hci_send_cmd(hdev, HCI_OP_SNIFF_SUBRATE, sizeof(cp), &cp);
458 if (!test_and_set_bit(HCI_CONN_MODE_CHANGE_PEND, &conn->flags)) {
459 struct hci_cp_sniff_mode cp;
460 cp.handle = cpu_to_le16(conn->handle);
461 cp.max_interval = cpu_to_le16(hdev->sniff_max_interval);
462 cp.min_interval = cpu_to_le16(hdev->sniff_min_interval);
463 cp.attempt = cpu_to_le16(4);
464 cp.timeout = cpu_to_le16(1);
465 hci_send_cmd(hdev, HCI_OP_SNIFF_MODE, sizeof(cp), &cp);
469 static void hci_conn_auto_accept(struct work_struct *work)
471 struct hci_conn *conn = container_of(work, struct hci_conn,
472 auto_accept_work.work);
474 hci_send_cmd(conn->hdev, HCI_OP_USER_CONFIRM_REPLY, sizeof(conn->dst),
478 static void le_disable_advertising(struct hci_dev *hdev)
480 if (ext_adv_capable(hdev)) {
481 struct hci_cp_le_set_ext_adv_enable cp;
484 cp.num_of_sets = 0x00;
486 hci_send_cmd(hdev, HCI_OP_LE_SET_EXT_ADV_ENABLE, sizeof(cp),
490 hci_send_cmd(hdev, HCI_OP_LE_SET_ADV_ENABLE, sizeof(enable),
495 static void le_conn_timeout(struct work_struct *work)
497 struct hci_conn *conn = container_of(work, struct hci_conn,
498 le_conn_timeout.work);
499 struct hci_dev *hdev = conn->hdev;
503 /* We could end up here due to having done directed advertising,
504 * so clean up the state if necessary. This should however only
505 * happen with broken hardware or if low duty cycle was used
506 * (which doesn't have a timeout of its own).
508 if (conn->role == HCI_ROLE_SLAVE) {
509 /* Disable LE Advertising */
510 le_disable_advertising(hdev);
511 hci_le_conn_failed(conn, HCI_ERROR_ADVERTISING_TIMEOUT);
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 master role
1067 * connections most controllers will refuse to connect if
1068 * advertising is enabled, and for slave 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 slave 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 acl = hci_conn_hash_lookup_ba(hdev, ACL_LINK, dst);
1252 acl = hci_conn_add(hdev, ACL_LINK, dst, HCI_ROLE_MASTER);
1254 return ERR_PTR(-ENOMEM);
1259 acl->conn_reason = conn_reason;
1260 if (acl->state == BT_OPEN || acl->state == BT_CLOSED) {
1261 acl->sec_level = BT_SECURITY_LOW;
1262 acl->pending_sec_level = sec_level;
1263 acl->auth_type = auth_type;
1264 hci_acl_create_connection(acl);
1270 struct hci_conn *hci_connect_sco(struct hci_dev *hdev, int type, bdaddr_t *dst,
1273 struct hci_conn *acl;
1274 struct hci_conn *sco;
1276 acl = hci_connect_acl(hdev, dst, BT_SECURITY_LOW, HCI_AT_NO_BONDING,
1277 CONN_REASON_SCO_CONNECT);
1281 sco = hci_conn_hash_lookup_ba(hdev, type, dst);
1283 sco = hci_conn_add(hdev, type, dst, HCI_ROLE_MASTER);
1286 return ERR_PTR(-ENOMEM);
1295 sco->setting = setting;
1297 if (acl->state == BT_CONNECTED &&
1298 (sco->state == BT_OPEN || sco->state == BT_CLOSED)) {
1299 set_bit(HCI_CONN_POWER_SAVE, &acl->flags);
1300 hci_conn_enter_active_mode(acl, BT_POWER_FORCE_ACTIVE_ON);
1302 if (test_bit(HCI_CONN_MODE_CHANGE_PEND, &acl->flags)) {
1303 /* defer SCO setup until mode change completed */
1304 set_bit(HCI_CONN_SCO_SETUP_PEND, &acl->flags);
1308 hci_sco_setup(acl, 0x00);
1314 /* Check link security requirement */
1315 int hci_conn_check_link_mode(struct hci_conn *conn)
1317 BT_DBG("hcon %p", conn);
1319 /* In Secure Connections Only mode, it is required that Secure
1320 * Connections is used and the link is encrypted with AES-CCM
1321 * using a P-256 authenticated combination key.
1323 if (hci_dev_test_flag(conn->hdev, HCI_SC_ONLY)) {
1324 if (!hci_conn_sc_enabled(conn) ||
1325 !test_bit(HCI_CONN_AES_CCM, &conn->flags) ||
1326 conn->key_type != HCI_LK_AUTH_COMBINATION_P256)
1330 /* AES encryption is required for Level 4:
1332 * BLUETOOTH CORE SPECIFICATION Version 5.2 | Vol 3, Part C
1335 * 128-bit equivalent strength for link and encryption keys
1336 * required using FIPS approved algorithms (E0 not allowed,
1337 * SAFER+ not allowed, and P-192 not allowed; encryption key
1340 if (conn->sec_level == BT_SECURITY_FIPS &&
1341 !test_bit(HCI_CONN_AES_CCM, &conn->flags)) {
1342 bt_dev_err(conn->hdev,
1343 "Invalid security: Missing AES-CCM usage");
1347 if (hci_conn_ssp_enabled(conn) &&
1348 !test_bit(HCI_CONN_ENCRYPT, &conn->flags))
1354 /* Authenticate remote device */
1355 static int hci_conn_auth(struct hci_conn *conn, __u8 sec_level, __u8 auth_type)
1357 BT_DBG("hcon %p", conn);
1359 if (conn->pending_sec_level > sec_level)
1360 sec_level = conn->pending_sec_level;
1362 if (sec_level > conn->sec_level)
1363 conn->pending_sec_level = sec_level;
1364 else if (test_bit(HCI_CONN_AUTH, &conn->flags))
1367 /* Make sure we preserve an existing MITM requirement*/
1368 auth_type |= (conn->auth_type & 0x01);
1370 conn->auth_type = auth_type;
1372 if (!test_and_set_bit(HCI_CONN_AUTH_PEND, &conn->flags)) {
1373 struct hci_cp_auth_requested cp;
1375 cp.handle = cpu_to_le16(conn->handle);
1376 hci_send_cmd(conn->hdev, HCI_OP_AUTH_REQUESTED,
1379 /* If we're already encrypted set the REAUTH_PEND flag,
1380 * otherwise set the ENCRYPT_PEND.
1382 if (test_bit(HCI_CONN_ENCRYPT, &conn->flags))
1383 set_bit(HCI_CONN_REAUTH_PEND, &conn->flags);
1385 set_bit(HCI_CONN_ENCRYPT_PEND, &conn->flags);
1391 /* Encrypt the link */
1392 static void hci_conn_encrypt(struct hci_conn *conn)
1394 BT_DBG("hcon %p", conn);
1396 if (!test_and_set_bit(HCI_CONN_ENCRYPT_PEND, &conn->flags)) {
1397 struct hci_cp_set_conn_encrypt cp;
1398 cp.handle = cpu_to_le16(conn->handle);
1400 hci_send_cmd(conn->hdev, HCI_OP_SET_CONN_ENCRYPT, sizeof(cp),
1405 /* Enable security */
1406 int hci_conn_security(struct hci_conn *conn, __u8 sec_level, __u8 auth_type,
1409 BT_DBG("hcon %p", conn);
1411 if (conn->type == LE_LINK)
1412 return smp_conn_security(conn, sec_level);
1414 /* For sdp we don't need the link key. */
1415 if (sec_level == BT_SECURITY_SDP)
1418 /* For non 2.1 devices and low security level we don't need the link
1420 if (sec_level == BT_SECURITY_LOW && !hci_conn_ssp_enabled(conn))
1423 /* For other security levels we need the link key. */
1424 if (!test_bit(HCI_CONN_AUTH, &conn->flags))
1427 /* An authenticated FIPS approved combination key has sufficient
1428 * security for security level 4. */
1429 if (conn->key_type == HCI_LK_AUTH_COMBINATION_P256 &&
1430 sec_level == BT_SECURITY_FIPS)
1433 /* An authenticated combination key has sufficient security for
1434 security level 3. */
1435 if ((conn->key_type == HCI_LK_AUTH_COMBINATION_P192 ||
1436 conn->key_type == HCI_LK_AUTH_COMBINATION_P256) &&
1437 sec_level == BT_SECURITY_HIGH)
1440 /* An unauthenticated combination key has sufficient security for
1441 security level 1 and 2. */
1442 if ((conn->key_type == HCI_LK_UNAUTH_COMBINATION_P192 ||
1443 conn->key_type == HCI_LK_UNAUTH_COMBINATION_P256) &&
1444 (sec_level == BT_SECURITY_MEDIUM || sec_level == BT_SECURITY_LOW))
1447 /* A combination key has always sufficient security for the security
1448 levels 1 or 2. High security level requires the combination key
1449 is generated using maximum PIN code length (16).
1450 For pre 2.1 units. */
1451 if (conn->key_type == HCI_LK_COMBINATION &&
1452 (sec_level == BT_SECURITY_MEDIUM || sec_level == BT_SECURITY_LOW ||
1453 conn->pin_length == 16))
1457 if (test_bit(HCI_CONN_ENCRYPT_PEND, &conn->flags))
1461 set_bit(HCI_CONN_AUTH_INITIATOR, &conn->flags);
1463 if (!hci_conn_auth(conn, sec_level, auth_type))
1467 if (test_bit(HCI_CONN_ENCRYPT, &conn->flags)) {
1468 /* Ensure that the encryption key size has been read,
1469 * otherwise stall the upper layer responses.
1471 if (!conn->enc_key_size)
1474 /* Nothing else needed, all requirements are met */
1478 hci_conn_encrypt(conn);
1481 EXPORT_SYMBOL(hci_conn_security);
1483 /* Check secure link requirement */
1484 int hci_conn_check_secure(struct hci_conn *conn, __u8 sec_level)
1486 BT_DBG("hcon %p", conn);
1488 /* Accept if non-secure or higher security level is required */
1489 if (sec_level != BT_SECURITY_HIGH && sec_level != BT_SECURITY_FIPS)
1492 /* Accept if secure or higher security level is already present */
1493 if (conn->sec_level == BT_SECURITY_HIGH ||
1494 conn->sec_level == BT_SECURITY_FIPS)
1497 /* Reject not secure link */
1500 EXPORT_SYMBOL(hci_conn_check_secure);
1503 int hci_conn_switch_role(struct hci_conn *conn, __u8 role)
1505 BT_DBG("hcon %p", conn);
1507 if (role == conn->role)
1510 if (!test_and_set_bit(HCI_CONN_RSWITCH_PEND, &conn->flags)) {
1511 struct hci_cp_switch_role cp;
1512 bacpy(&cp.bdaddr, &conn->dst);
1514 hci_send_cmd(conn->hdev, HCI_OP_SWITCH_ROLE, sizeof(cp), &cp);
1519 EXPORT_SYMBOL(hci_conn_switch_role);
1521 /* Enter active mode */
1522 void hci_conn_enter_active_mode(struct hci_conn *conn, __u8 force_active)
1524 struct hci_dev *hdev = conn->hdev;
1526 BT_DBG("hcon %p mode %d", conn, conn->mode);
1528 if (conn->mode != HCI_CM_SNIFF)
1531 if (!test_bit(HCI_CONN_POWER_SAVE, &conn->flags) && !force_active)
1534 if (!test_and_set_bit(HCI_CONN_MODE_CHANGE_PEND, &conn->flags)) {
1535 struct hci_cp_exit_sniff_mode cp;
1536 cp.handle = cpu_to_le16(conn->handle);
1537 hci_send_cmd(hdev, HCI_OP_EXIT_SNIFF_MODE, sizeof(cp), &cp);
1541 if (hdev->idle_timeout > 0)
1542 queue_delayed_work(hdev->workqueue, &conn->idle_work,
1543 msecs_to_jiffies(hdev->idle_timeout));
1546 /* Drop all connection on the device */
1547 void hci_conn_hash_flush(struct hci_dev *hdev)
1549 struct hci_conn_hash *h = &hdev->conn_hash;
1550 struct hci_conn *c, *n;
1552 BT_DBG("hdev %s", hdev->name);
1554 list_for_each_entry_safe(c, n, &h->list, list) {
1555 c->state = BT_CLOSED;
1557 hci_disconn_cfm(c, HCI_ERROR_LOCAL_HOST_TERM);
1562 /* Check pending connect attempts */
1563 void hci_conn_check_pending(struct hci_dev *hdev)
1565 struct hci_conn *conn;
1567 BT_DBG("hdev %s", hdev->name);
1571 conn = hci_conn_hash_lookup_state(hdev, ACL_LINK, BT_CONNECT2);
1573 hci_acl_create_connection(conn);
1575 hci_dev_unlock(hdev);
1578 static u32 get_link_mode(struct hci_conn *conn)
1582 if (conn->role == HCI_ROLE_MASTER)
1583 link_mode |= HCI_LM_MASTER;
1585 if (test_bit(HCI_CONN_ENCRYPT, &conn->flags))
1586 link_mode |= HCI_LM_ENCRYPT;
1588 if (test_bit(HCI_CONN_AUTH, &conn->flags))
1589 link_mode |= HCI_LM_AUTH;
1591 if (test_bit(HCI_CONN_SECURE, &conn->flags))
1592 link_mode |= HCI_LM_SECURE;
1594 if (test_bit(HCI_CONN_FIPS, &conn->flags))
1595 link_mode |= HCI_LM_FIPS;
1600 int hci_get_conn_list(void __user *arg)
1603 struct hci_conn_list_req req, *cl;
1604 struct hci_conn_info *ci;
1605 struct hci_dev *hdev;
1606 int n = 0, size, err;
1608 if (copy_from_user(&req, arg, sizeof(req)))
1611 if (!req.conn_num || req.conn_num > (PAGE_SIZE * 2) / sizeof(*ci))
1614 size = sizeof(req) + req.conn_num * sizeof(*ci);
1616 cl = kmalloc(size, GFP_KERNEL);
1620 hdev = hci_dev_get(req.dev_id);
1629 list_for_each_entry(c, &hdev->conn_hash.list, list) {
1630 bacpy(&(ci + n)->bdaddr, &c->dst);
1631 (ci + n)->handle = c->handle;
1632 (ci + n)->type = c->type;
1633 (ci + n)->out = c->out;
1634 (ci + n)->state = c->state;
1635 (ci + n)->link_mode = get_link_mode(c);
1636 if (++n >= req.conn_num)
1639 hci_dev_unlock(hdev);
1641 cl->dev_id = hdev->id;
1643 size = sizeof(req) + n * sizeof(*ci);
1647 err = copy_to_user(arg, cl, size);
1650 return err ? -EFAULT : 0;
1653 int hci_get_conn_info(struct hci_dev *hdev, void __user *arg)
1655 struct hci_conn_info_req req;
1656 struct hci_conn_info ci;
1657 struct hci_conn *conn;
1658 char __user *ptr = arg + sizeof(req);
1660 if (copy_from_user(&req, arg, sizeof(req)))
1664 conn = hci_conn_hash_lookup_ba(hdev, req.type, &req.bdaddr);
1666 bacpy(&ci.bdaddr, &conn->dst);
1667 ci.handle = conn->handle;
1668 ci.type = conn->type;
1670 ci.state = conn->state;
1671 ci.link_mode = get_link_mode(conn);
1673 hci_dev_unlock(hdev);
1678 return copy_to_user(ptr, &ci, sizeof(ci)) ? -EFAULT : 0;
1681 int hci_get_auth_info(struct hci_dev *hdev, void __user *arg)
1683 struct hci_auth_info_req req;
1684 struct hci_conn *conn;
1686 if (copy_from_user(&req, arg, sizeof(req)))
1690 conn = hci_conn_hash_lookup_ba(hdev, ACL_LINK, &req.bdaddr);
1692 req.type = conn->auth_type;
1693 hci_dev_unlock(hdev);
1698 return copy_to_user(arg, &req, sizeof(req)) ? -EFAULT : 0;
1701 struct hci_chan *hci_chan_create(struct hci_conn *conn)
1703 struct hci_dev *hdev = conn->hdev;
1704 struct hci_chan *chan;
1706 BT_DBG("%s hcon %p", hdev->name, conn);
1708 if (test_bit(HCI_CONN_DROP, &conn->flags)) {
1709 BT_DBG("Refusing to create new hci_chan");
1713 chan = kzalloc(sizeof(*chan), GFP_KERNEL);
1717 chan->conn = hci_conn_get(conn);
1718 skb_queue_head_init(&chan->data_q);
1719 chan->state = BT_CONNECTED;
1721 list_add_rcu(&chan->list, &conn->chan_list);
1726 void hci_chan_del(struct hci_chan *chan)
1728 struct hci_conn *conn = chan->conn;
1729 struct hci_dev *hdev = conn->hdev;
1731 BT_DBG("%s hcon %p chan %p", hdev->name, conn, chan);
1733 list_del_rcu(&chan->list);
1737 /* Prevent new hci_chan's to be created for this hci_conn */
1738 set_bit(HCI_CONN_DROP, &conn->flags);
1742 skb_queue_purge(&chan->data_q);
1746 void hci_chan_list_flush(struct hci_conn *conn)
1748 struct hci_chan *chan, *n;
1750 BT_DBG("hcon %p", conn);
1752 list_for_each_entry_safe(chan, n, &conn->chan_list, list)
1756 static struct hci_chan *__hci_chan_lookup_handle(struct hci_conn *hcon,
1759 struct hci_chan *hchan;
1761 list_for_each_entry(hchan, &hcon->chan_list, list) {
1762 if (hchan->handle == handle)
1769 struct hci_chan *hci_chan_lookup_handle(struct hci_dev *hdev, __u16 handle)
1771 struct hci_conn_hash *h = &hdev->conn_hash;
1772 struct hci_conn *hcon;
1773 struct hci_chan *hchan = NULL;
1777 list_for_each_entry_rcu(hcon, &h->list, list) {
1778 hchan = __hci_chan_lookup_handle(hcon, handle);
1788 u32 hci_conn_get_phy(struct hci_conn *conn)
1792 hci_dev_lock(conn->hdev);
1794 /* BLUETOOTH CORE SPECIFICATION Version 5.2 | Vol 2, Part B page 471:
1795 * Table 6.2: Packets defined for synchronous, asynchronous, and
1796 * CSB logical transport types.
1798 switch (conn->type) {
1800 /* SCO logical transport (1 Mb/s):
1801 * HV1, HV2, HV3 and DV.
1803 phys |= BT_PHY_BR_1M_1SLOT;
1808 /* ACL logical transport (1 Mb/s) ptt=0:
1809 * DH1, DM3, DH3, DM5 and DH5.
1811 phys |= BT_PHY_BR_1M_1SLOT;
1813 if (conn->pkt_type & (HCI_DM3 | HCI_DH3))
1814 phys |= BT_PHY_BR_1M_3SLOT;
1816 if (conn->pkt_type & (HCI_DM5 | HCI_DH5))
1817 phys |= BT_PHY_BR_1M_5SLOT;
1819 /* ACL logical transport (2 Mb/s) ptt=1:
1820 * 2-DH1, 2-DH3 and 2-DH5.
1822 if (!(conn->pkt_type & HCI_2DH1))
1823 phys |= BT_PHY_EDR_2M_1SLOT;
1825 if (!(conn->pkt_type & HCI_2DH3))
1826 phys |= BT_PHY_EDR_2M_3SLOT;
1828 if (!(conn->pkt_type & HCI_2DH5))
1829 phys |= BT_PHY_EDR_2M_5SLOT;
1831 /* ACL logical transport (3 Mb/s) ptt=1:
1832 * 3-DH1, 3-DH3 and 3-DH5.
1834 if (!(conn->pkt_type & HCI_3DH1))
1835 phys |= BT_PHY_EDR_3M_1SLOT;
1837 if (!(conn->pkt_type & HCI_3DH3))
1838 phys |= BT_PHY_EDR_3M_3SLOT;
1840 if (!(conn->pkt_type & HCI_3DH5))
1841 phys |= BT_PHY_EDR_3M_5SLOT;
1846 /* eSCO logical transport (1 Mb/s): EV3, EV4 and EV5 */
1847 phys |= BT_PHY_BR_1M_1SLOT;
1849 if (!(conn->pkt_type & (ESCO_EV4 | ESCO_EV5)))
1850 phys |= BT_PHY_BR_1M_3SLOT;
1852 /* eSCO logical transport (2 Mb/s): 2-EV3, 2-EV5 */
1853 if (!(conn->pkt_type & ESCO_2EV3))
1854 phys |= BT_PHY_EDR_2M_1SLOT;
1856 if (!(conn->pkt_type & ESCO_2EV5))
1857 phys |= BT_PHY_EDR_2M_3SLOT;
1859 /* eSCO logical transport (3 Mb/s): 3-EV3, 3-EV5 */
1860 if (!(conn->pkt_type & ESCO_3EV3))
1861 phys |= BT_PHY_EDR_3M_1SLOT;
1863 if (!(conn->pkt_type & ESCO_3EV5))
1864 phys |= BT_PHY_EDR_3M_3SLOT;
1869 if (conn->le_tx_phy & HCI_LE_SET_PHY_1M)
1870 phys |= BT_PHY_LE_1M_TX;
1872 if (conn->le_rx_phy & HCI_LE_SET_PHY_1M)
1873 phys |= BT_PHY_LE_1M_RX;
1875 if (conn->le_tx_phy & HCI_LE_SET_PHY_2M)
1876 phys |= BT_PHY_LE_2M_TX;
1878 if (conn->le_rx_phy & HCI_LE_SET_PHY_2M)
1879 phys |= BT_PHY_LE_2M_RX;
1881 if (conn->le_tx_phy & HCI_LE_SET_PHY_CODED)
1882 phys |= BT_PHY_LE_CODED_TX;
1884 if (conn->le_rx_phy & HCI_LE_SET_PHY_CODED)
1885 phys |= BT_PHY_LE_CODED_RX;
1890 hci_dev_unlock(conn->hdev);