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 /* Set Default Authenticated payload timeout to 30s */
524 conn->auth_payload_timeout = DEFAULT_AUTH_PAYLOAD_TIMEOUT;
526 if (conn->role == HCI_ROLE_MASTER)
531 conn->pkt_type = hdev->pkt_type & ACL_PTYPE_MASK;
534 /* conn->src should reflect the local identity address */
535 hci_copy_identity_address(hdev, &conn->src, &conn->src_type);
538 if (lmp_esco_capable(hdev))
539 conn->pkt_type = (hdev->esco_type & SCO_ESCO_MASK) |
540 (hdev->esco_type & EDR_ESCO_MASK);
542 conn->pkt_type = hdev->pkt_type & SCO_PTYPE_MASK;
545 conn->pkt_type = hdev->esco_type & ~EDR_ESCO_MASK;
549 skb_queue_head_init(&conn->data_q);
551 INIT_LIST_HEAD(&conn->chan_list);
553 INIT_DELAYED_WORK(&conn->disc_work, hci_conn_timeout);
554 INIT_DELAYED_WORK(&conn->auto_accept_work, hci_conn_auto_accept);
555 INIT_DELAYED_WORK(&conn->idle_work, hci_conn_idle);
556 INIT_DELAYED_WORK(&conn->le_conn_timeout, le_conn_timeout);
557 INIT_WORK(&conn->le_scan_cleanup, le_scan_cleanup);
559 atomic_set(&conn->refcnt, 0);
563 hci_conn_hash_add(hdev, conn);
565 hdev->notify(hdev, HCI_NOTIFY_CONN_ADD);
567 hci_conn_init_sysfs(conn);
572 int hci_conn_del(struct hci_conn *conn)
574 struct hci_dev *hdev = conn->hdev;
576 BT_DBG("%s hcon %p handle %d", hdev->name, conn, conn->handle);
578 cancel_delayed_work_sync(&conn->disc_work);
579 cancel_delayed_work_sync(&conn->auto_accept_work);
580 cancel_delayed_work_sync(&conn->idle_work);
582 if (conn->type == ACL_LINK) {
583 struct hci_conn *sco = conn->link;
588 hdev->acl_cnt += conn->sent;
589 } else if (conn->type == LE_LINK) {
590 cancel_delayed_work(&conn->le_conn_timeout);
593 hdev->le_cnt += conn->sent;
595 hdev->acl_cnt += conn->sent;
597 struct hci_conn *acl = conn->link;
605 amp_mgr_put(conn->amp_mgr);
607 skb_queue_purge(&conn->data_q);
609 /* Remove the connection from the list and cleanup its remaining
610 * state. This is a separate function since for some cases like
611 * BT_CONNECT_SCAN we *only* want the cleanup part without the
612 * rest of hci_conn_del.
614 hci_conn_cleanup(conn);
619 struct hci_dev *hci_get_route(bdaddr_t *dst, bdaddr_t *src, uint8_t src_type)
621 int use_src = bacmp(src, BDADDR_ANY);
622 struct hci_dev *hdev = NULL, *d;
624 BT_DBG("%pMR -> %pMR", src, dst);
626 read_lock(&hci_dev_list_lock);
628 list_for_each_entry(d, &hci_dev_list, list) {
629 if (!test_bit(HCI_UP, &d->flags) ||
630 hci_dev_test_flag(d, HCI_USER_CHANNEL) ||
631 d->dev_type != HCI_PRIMARY)
635 * No source address - find interface with bdaddr != dst
636 * Source address - find interface with bdaddr == src
643 if (src_type == BDADDR_BREDR) {
644 if (!lmp_bredr_capable(d))
646 bacpy(&id_addr, &d->bdaddr);
647 id_addr_type = BDADDR_BREDR;
649 if (!lmp_le_capable(d))
652 hci_copy_identity_address(d, &id_addr,
655 /* Convert from HCI to three-value type */
656 if (id_addr_type == ADDR_LE_DEV_PUBLIC)
657 id_addr_type = BDADDR_LE_PUBLIC;
659 id_addr_type = BDADDR_LE_RANDOM;
662 if (!bacmp(&id_addr, src) && id_addr_type == src_type) {
666 if (bacmp(&d->bdaddr, dst)) {
673 hdev = hci_dev_hold(hdev);
675 read_unlock(&hci_dev_list_lock);
678 EXPORT_SYMBOL(hci_get_route);
680 /* This function requires the caller holds hdev->lock */
681 void hci_le_conn_failed(struct hci_conn *conn, u8 status)
683 struct hci_dev *hdev = conn->hdev;
684 struct hci_conn_params *params;
686 params = hci_pend_le_action_lookup(&hdev->pend_le_conns, &conn->dst,
688 if (params && params->conn) {
689 hci_conn_drop(params->conn);
690 hci_conn_put(params->conn);
694 conn->state = BT_CLOSED;
696 /* If the status indicates successful cancellation of
697 * the attempt (i.e. Unkown Connection Id) there's no point of
698 * notifying failure since we'll go back to keep trying to
699 * connect. The only exception is explicit connect requests
700 * where a timeout + cancel does indicate an actual failure.
702 if (status != HCI_ERROR_UNKNOWN_CONN_ID ||
703 (params && params->explicit_connect))
704 mgmt_connect_failed(hdev, &conn->dst, conn->type,
705 conn->dst_type, status);
707 hci_connect_cfm(conn, status);
711 /* Since we may have temporarily stopped the background scanning in
712 * favor of connection establishment, we should restart it.
714 hci_update_background_scan(hdev);
716 /* Re-enable advertising in case this was a failed connection
717 * attempt as a peripheral.
719 hci_req_reenable_advertising(hdev);
722 static void create_le_conn_complete(struct hci_dev *hdev, u8 status, u16 opcode)
724 struct hci_conn *conn;
728 conn = hci_lookup_le_connect(hdev);
731 hci_connect_le_scan_cleanup(conn);
735 bt_dev_err(hdev, "request failed to create LE connection: "
736 "status 0x%2.2x", status);
741 hci_le_conn_failed(conn, status);
744 hci_dev_unlock(hdev);
747 static bool conn_use_rpa(struct hci_conn *conn)
749 struct hci_dev *hdev = conn->hdev;
751 return hci_dev_test_flag(hdev, HCI_PRIVACY);
754 static void set_ext_conn_params(struct hci_conn *conn,
755 struct hci_cp_le_ext_conn_param *p)
757 struct hci_dev *hdev = conn->hdev;
759 memset(p, 0, sizeof(*p));
761 /* Set window to be the same value as the interval to
762 * enable continuous scanning.
764 p->scan_interval = cpu_to_le16(hdev->le_scan_interval);
765 p->scan_window = p->scan_interval;
766 p->conn_interval_min = cpu_to_le16(conn->le_conn_min_interval);
767 p->conn_interval_max = cpu_to_le16(conn->le_conn_max_interval);
768 p->conn_latency = cpu_to_le16(conn->le_conn_latency);
769 p->supervision_timeout = cpu_to_le16(conn->le_supv_timeout);
770 p->min_ce_len = cpu_to_le16(0x0000);
771 p->max_ce_len = cpu_to_le16(0x0000);
774 static void hci_req_add_le_create_conn(struct hci_request *req,
775 struct hci_conn *conn,
776 bdaddr_t *direct_rpa)
778 struct hci_dev *hdev = conn->hdev;
781 /* If direct address was provided we use it instead of current
785 if (bacmp(&req->hdev->random_addr, direct_rpa))
786 hci_req_add(req, HCI_OP_LE_SET_RANDOM_ADDR, 6,
789 /* direct address is always RPA */
790 own_addr_type = ADDR_LE_DEV_RANDOM;
792 /* Update random address, but set require_privacy to false so
793 * that we never connect with an non-resolvable address.
795 if (hci_update_random_address(req, false, conn_use_rpa(conn),
800 if (use_ext_conn(hdev)) {
801 struct hci_cp_le_ext_create_conn *cp;
802 struct hci_cp_le_ext_conn_param *p;
803 u8 data[sizeof(*cp) + sizeof(*p) * 3];
807 p = (void *) cp->data;
809 memset(cp, 0, sizeof(*cp));
811 bacpy(&cp->peer_addr, &conn->dst);
812 cp->peer_addr_type = conn->dst_type;
813 cp->own_addr_type = own_addr_type;
818 cp->phys |= LE_SCAN_PHY_1M;
819 set_ext_conn_params(conn, p);
826 cp->phys |= LE_SCAN_PHY_2M;
827 set_ext_conn_params(conn, p);
833 if (scan_coded(hdev)) {
834 cp->phys |= LE_SCAN_PHY_CODED;
835 set_ext_conn_params(conn, p);
840 hci_req_add(req, HCI_OP_LE_EXT_CREATE_CONN, plen, data);
843 struct hci_cp_le_create_conn cp;
845 memset(&cp, 0, sizeof(cp));
847 /* Set window to be the same value as the interval to enable
848 * continuous scanning.
850 cp.scan_interval = cpu_to_le16(hdev->le_scan_interval);
851 cp.scan_window = cp.scan_interval;
853 bacpy(&cp.peer_addr, &conn->dst);
854 cp.peer_addr_type = conn->dst_type;
855 cp.own_address_type = own_addr_type;
856 cp.conn_interval_min = cpu_to_le16(conn->le_conn_min_interval);
857 cp.conn_interval_max = cpu_to_le16(conn->le_conn_max_interval);
858 cp.conn_latency = cpu_to_le16(conn->le_conn_latency);
859 cp.supervision_timeout = cpu_to_le16(conn->le_supv_timeout);
860 cp.min_ce_len = cpu_to_le16(0x0000);
861 cp.max_ce_len = cpu_to_le16(0x0000);
863 hci_req_add(req, HCI_OP_LE_CREATE_CONN, sizeof(cp), &cp);
866 conn->state = BT_CONNECT;
867 clear_bit(HCI_CONN_SCANNING, &conn->flags);
870 static void hci_req_directed_advertising(struct hci_request *req,
871 struct hci_conn *conn)
873 struct hci_dev *hdev = req->hdev;
877 if (ext_adv_capable(hdev)) {
878 struct hci_cp_le_set_ext_adv_params cp;
879 bdaddr_t random_addr;
881 /* Set require_privacy to false so that the remote device has a
882 * chance of identifying us.
884 if (hci_get_random_address(hdev, false, conn_use_rpa(conn), NULL,
885 &own_addr_type, &random_addr) < 0)
888 memset(&cp, 0, sizeof(cp));
890 cp.evt_properties = cpu_to_le16(LE_LEGACY_ADV_DIRECT_IND);
891 cp.own_addr_type = own_addr_type;
892 cp.channel_map = hdev->le_adv_channel_map;
893 cp.tx_power = HCI_TX_POWER_INVALID;
894 cp.primary_phy = HCI_ADV_PHY_1M;
895 cp.secondary_phy = HCI_ADV_PHY_1M;
896 cp.handle = 0; /* Use instance 0 for directed adv */
897 cp.own_addr_type = own_addr_type;
898 cp.peer_addr_type = conn->dst_type;
899 bacpy(&cp.peer_addr, &conn->dst);
901 hci_req_add(req, HCI_OP_LE_SET_EXT_ADV_PARAMS, sizeof(cp), &cp);
903 if (own_addr_type == ADDR_LE_DEV_RANDOM &&
904 bacmp(&random_addr, BDADDR_ANY) &&
905 bacmp(&random_addr, &hdev->random_addr)) {
906 struct hci_cp_le_set_adv_set_rand_addr cp;
908 memset(&cp, 0, sizeof(cp));
911 bacpy(&cp.bdaddr, &random_addr);
914 HCI_OP_LE_SET_ADV_SET_RAND_ADDR,
918 __hci_req_enable_ext_advertising(req, 0x00);
920 struct hci_cp_le_set_adv_param cp;
922 /* Clear the HCI_LE_ADV bit temporarily so that the
923 * hci_update_random_address knows that it's safe to go ahead
924 * and write a new random address. The flag will be set back on
925 * as soon as the SET_ADV_ENABLE HCI command completes.
927 hci_dev_clear_flag(hdev, HCI_LE_ADV);
929 /* Set require_privacy to false so that the remote device has a
930 * chance of identifying us.
932 if (hci_update_random_address(req, false, conn_use_rpa(conn),
936 memset(&cp, 0, sizeof(cp));
937 cp.type = LE_ADV_DIRECT_IND;
938 cp.own_address_type = own_addr_type;
939 cp.direct_addr_type = conn->dst_type;
940 bacpy(&cp.direct_addr, &conn->dst);
941 cp.channel_map = hdev->le_adv_channel_map;
943 hci_req_add(req, HCI_OP_LE_SET_ADV_PARAM, sizeof(cp), &cp);
946 hci_req_add(req, HCI_OP_LE_SET_ADV_ENABLE, sizeof(enable),
950 conn->state = BT_CONNECT;
953 struct hci_conn *hci_connect_le(struct hci_dev *hdev, bdaddr_t *dst,
954 u8 dst_type, u8 sec_level, u16 conn_timeout,
955 u8 role, bdaddr_t *direct_rpa)
957 struct hci_conn_params *params;
958 struct hci_conn *conn;
960 struct hci_request req;
963 /* Let's make sure that le is enabled.*/
964 if (!hci_dev_test_flag(hdev, HCI_LE_ENABLED)) {
965 if (lmp_le_capable(hdev))
966 return ERR_PTR(-ECONNREFUSED);
968 return ERR_PTR(-EOPNOTSUPP);
971 /* Since the controller supports only one LE connection attempt at a
972 * time, we return -EBUSY if there is any connection attempt running.
974 if (hci_lookup_le_connect(hdev))
975 return ERR_PTR(-EBUSY);
977 /* If there's already a connection object but it's not in
978 * scanning state it means it must already be established, in
979 * which case we can't do anything else except report a failure
982 conn = hci_conn_hash_lookup_le(hdev, dst, dst_type);
983 if (conn && !test_bit(HCI_CONN_SCANNING, &conn->flags)) {
984 return ERR_PTR(-EBUSY);
987 /* When given an identity address with existing identity
988 * resolving key, the connection needs to be established
989 * to a resolvable random address.
991 * Storing the resolvable random address is required here
992 * to handle connection failures. The address will later
993 * be resolved back into the original identity address
994 * from the connect request.
996 irk = hci_find_irk_by_addr(hdev, dst, dst_type);
997 if (irk && bacmp(&irk->rpa, BDADDR_ANY)) {
999 dst_type = ADDR_LE_DEV_RANDOM;
1003 bacpy(&conn->dst, dst);
1005 conn = hci_conn_add(hdev, LE_LINK, dst, role);
1007 return ERR_PTR(-ENOMEM);
1008 hci_conn_hold(conn);
1009 conn->pending_sec_level = sec_level;
1012 conn->dst_type = dst_type;
1013 conn->sec_level = BT_SECURITY_LOW;
1014 conn->conn_timeout = conn_timeout;
1016 hci_req_init(&req, hdev);
1018 /* Disable advertising if we're active. For master role
1019 * connections most controllers will refuse to connect if
1020 * advertising is enabled, and for slave role connections we
1021 * anyway have to disable it in order to start directed
1024 if (hci_dev_test_flag(hdev, HCI_LE_ADV)) {
1026 hci_req_add(&req, HCI_OP_LE_SET_ADV_ENABLE, sizeof(enable),
1030 /* If requested to connect as slave use directed advertising */
1031 if (conn->role == HCI_ROLE_SLAVE) {
1032 /* If we're active scanning most controllers are unable
1033 * to initiate advertising. Simply reject the attempt.
1035 if (hci_dev_test_flag(hdev, HCI_LE_SCAN) &&
1036 hdev->le_scan_type == LE_SCAN_ACTIVE) {
1037 hci_req_purge(&req);
1039 return ERR_PTR(-EBUSY);
1042 hci_req_directed_advertising(&req, conn);
1046 params = hci_conn_params_lookup(hdev, &conn->dst, conn->dst_type);
1048 conn->le_conn_min_interval = params->conn_min_interval;
1049 conn->le_conn_max_interval = params->conn_max_interval;
1050 conn->le_conn_latency = params->conn_latency;
1051 conn->le_supv_timeout = params->supervision_timeout;
1053 conn->le_conn_min_interval = hdev->le_conn_min_interval;
1054 conn->le_conn_max_interval = hdev->le_conn_max_interval;
1055 conn->le_conn_latency = hdev->le_conn_latency;
1056 conn->le_supv_timeout = hdev->le_supv_timeout;
1059 /* If controller is scanning, we stop it since some controllers are
1060 * not able to scan and connect at the same time. Also set the
1061 * HCI_LE_SCAN_INTERRUPTED flag so that the command complete
1062 * handler for scan disabling knows to set the correct discovery
1065 if (hci_dev_test_flag(hdev, HCI_LE_SCAN)) {
1066 hci_req_add_le_scan_disable(&req);
1067 hci_dev_set_flag(hdev, HCI_LE_SCAN_INTERRUPTED);
1070 hci_req_add_le_create_conn(&req, conn, direct_rpa);
1073 err = hci_req_run(&req, create_le_conn_complete);
1076 return ERR_PTR(err);
1082 static bool is_connected(struct hci_dev *hdev, bdaddr_t *addr, u8 type)
1084 struct hci_conn *conn;
1086 conn = hci_conn_hash_lookup_le(hdev, addr, type);
1090 if (conn->state != BT_CONNECTED)
1096 /* This function requires the caller holds hdev->lock */
1097 static int hci_explicit_conn_params_set(struct hci_dev *hdev,
1098 bdaddr_t *addr, u8 addr_type)
1100 struct hci_conn_params *params;
1102 if (is_connected(hdev, addr, addr_type))
1105 params = hci_conn_params_lookup(hdev, addr, addr_type);
1107 params = hci_conn_params_add(hdev, addr, addr_type);
1111 /* If we created new params, mark them to be deleted in
1112 * hci_connect_le_scan_cleanup. It's different case than
1113 * existing disabled params, those will stay after cleanup.
1115 params->auto_connect = HCI_AUTO_CONN_EXPLICIT;
1118 /* We're trying to connect, so make sure params are at pend_le_conns */
1119 if (params->auto_connect == HCI_AUTO_CONN_DISABLED ||
1120 params->auto_connect == HCI_AUTO_CONN_REPORT ||
1121 params->auto_connect == HCI_AUTO_CONN_EXPLICIT) {
1122 list_del_init(¶ms->action);
1123 list_add(¶ms->action, &hdev->pend_le_conns);
1126 params->explicit_connect = true;
1128 BT_DBG("addr %pMR (type %u) auto_connect %u", addr, addr_type,
1129 params->auto_connect);
1134 /* This function requires the caller holds hdev->lock */
1135 struct hci_conn *hci_connect_le_scan(struct hci_dev *hdev, bdaddr_t *dst,
1136 u8 dst_type, u8 sec_level,
1139 struct hci_conn *conn;
1141 /* Let's make sure that le is enabled.*/
1142 if (!hci_dev_test_flag(hdev, HCI_LE_ENABLED)) {
1143 if (lmp_le_capable(hdev))
1144 return ERR_PTR(-ECONNREFUSED);
1146 return ERR_PTR(-EOPNOTSUPP);
1149 /* Some devices send ATT messages as soon as the physical link is
1150 * established. To be able to handle these ATT messages, the user-
1151 * space first establishes the connection and then starts the pairing
1154 * So if a hci_conn object already exists for the following connection
1155 * attempt, we simply update pending_sec_level and auth_type fields
1156 * and return the object found.
1158 conn = hci_conn_hash_lookup_le(hdev, dst, dst_type);
1160 if (conn->pending_sec_level < sec_level)
1161 conn->pending_sec_level = sec_level;
1165 BT_DBG("requesting refresh of dst_addr");
1167 conn = hci_conn_add(hdev, LE_LINK, dst, HCI_ROLE_MASTER);
1169 return ERR_PTR(-ENOMEM);
1171 if (hci_explicit_conn_params_set(hdev, dst, dst_type) < 0)
1172 return ERR_PTR(-EBUSY);
1174 conn->state = BT_CONNECT;
1175 set_bit(HCI_CONN_SCANNING, &conn->flags);
1176 conn->dst_type = dst_type;
1177 conn->sec_level = BT_SECURITY_LOW;
1178 conn->pending_sec_level = sec_level;
1179 conn->conn_timeout = conn_timeout;
1181 hci_update_background_scan(hdev);
1184 hci_conn_hold(conn);
1188 struct hci_conn *hci_connect_acl(struct hci_dev *hdev, bdaddr_t *dst,
1189 u8 sec_level, u8 auth_type)
1191 struct hci_conn *acl;
1193 if (!hci_dev_test_flag(hdev, HCI_BREDR_ENABLED)) {
1194 if (lmp_bredr_capable(hdev))
1195 return ERR_PTR(-ECONNREFUSED);
1197 return ERR_PTR(-EOPNOTSUPP);
1200 acl = hci_conn_hash_lookup_ba(hdev, ACL_LINK, dst);
1202 acl = hci_conn_add(hdev, ACL_LINK, dst, HCI_ROLE_MASTER);
1204 return ERR_PTR(-ENOMEM);
1209 if (acl->state == BT_OPEN || acl->state == BT_CLOSED) {
1210 acl->sec_level = BT_SECURITY_LOW;
1211 acl->pending_sec_level = sec_level;
1212 acl->auth_type = auth_type;
1213 hci_acl_create_connection(acl);
1219 struct hci_conn *hci_connect_sco(struct hci_dev *hdev, int type, bdaddr_t *dst,
1222 struct hci_conn *acl;
1223 struct hci_conn *sco;
1225 acl = hci_connect_acl(hdev, dst, BT_SECURITY_LOW, HCI_AT_NO_BONDING);
1229 sco = hci_conn_hash_lookup_ba(hdev, type, dst);
1231 sco = hci_conn_add(hdev, type, dst, HCI_ROLE_MASTER);
1234 return ERR_PTR(-ENOMEM);
1243 sco->setting = setting;
1245 if (acl->state == BT_CONNECTED &&
1246 (sco->state == BT_OPEN || sco->state == BT_CLOSED)) {
1247 set_bit(HCI_CONN_POWER_SAVE, &acl->flags);
1248 hci_conn_enter_active_mode(acl, BT_POWER_FORCE_ACTIVE_ON);
1250 if (test_bit(HCI_CONN_MODE_CHANGE_PEND, &acl->flags)) {
1251 /* defer SCO setup until mode change completed */
1252 set_bit(HCI_CONN_SCO_SETUP_PEND, &acl->flags);
1256 hci_sco_setup(acl, 0x00);
1262 /* Check link security requirement */
1263 int hci_conn_check_link_mode(struct hci_conn *conn)
1265 BT_DBG("hcon %p", conn);
1267 /* In Secure Connections Only mode, it is required that Secure
1268 * Connections is used and the link is encrypted with AES-CCM
1269 * using a P-256 authenticated combination key.
1271 if (hci_dev_test_flag(conn->hdev, HCI_SC_ONLY)) {
1272 if (!hci_conn_sc_enabled(conn) ||
1273 !test_bit(HCI_CONN_AES_CCM, &conn->flags) ||
1274 conn->key_type != HCI_LK_AUTH_COMBINATION_P256)
1278 if (hci_conn_ssp_enabled(conn) &&
1279 !test_bit(HCI_CONN_ENCRYPT, &conn->flags))
1285 /* Authenticate remote device */
1286 static int hci_conn_auth(struct hci_conn *conn, __u8 sec_level, __u8 auth_type)
1288 BT_DBG("hcon %p", conn);
1290 if (conn->pending_sec_level > sec_level)
1291 sec_level = conn->pending_sec_level;
1293 if (sec_level > conn->sec_level)
1294 conn->pending_sec_level = sec_level;
1295 else if (test_bit(HCI_CONN_AUTH, &conn->flags))
1298 /* Make sure we preserve an existing MITM requirement*/
1299 auth_type |= (conn->auth_type & 0x01);
1301 conn->auth_type = auth_type;
1303 if (!test_and_set_bit(HCI_CONN_AUTH_PEND, &conn->flags)) {
1304 struct hci_cp_auth_requested cp;
1306 cp.handle = cpu_to_le16(conn->handle);
1307 hci_send_cmd(conn->hdev, HCI_OP_AUTH_REQUESTED,
1310 /* If we're already encrypted set the REAUTH_PEND flag,
1311 * otherwise set the ENCRYPT_PEND.
1313 if (test_bit(HCI_CONN_ENCRYPT, &conn->flags))
1314 set_bit(HCI_CONN_REAUTH_PEND, &conn->flags);
1316 set_bit(HCI_CONN_ENCRYPT_PEND, &conn->flags);
1322 /* Encrypt the the link */
1323 static void hci_conn_encrypt(struct hci_conn *conn)
1325 BT_DBG("hcon %p", conn);
1327 if (!test_and_set_bit(HCI_CONN_ENCRYPT_PEND, &conn->flags)) {
1328 struct hci_cp_set_conn_encrypt cp;
1329 cp.handle = cpu_to_le16(conn->handle);
1331 hci_send_cmd(conn->hdev, HCI_OP_SET_CONN_ENCRYPT, sizeof(cp),
1336 /* Enable security */
1337 int hci_conn_security(struct hci_conn *conn, __u8 sec_level, __u8 auth_type,
1340 BT_DBG("hcon %p", conn);
1342 if (conn->type == LE_LINK)
1343 return smp_conn_security(conn, sec_level);
1345 /* For sdp we don't need the link key. */
1346 if (sec_level == BT_SECURITY_SDP)
1349 /* For non 2.1 devices and low security level we don't need the link
1351 if (sec_level == BT_SECURITY_LOW && !hci_conn_ssp_enabled(conn))
1354 /* For other security levels we need the link key. */
1355 if (!test_bit(HCI_CONN_AUTH, &conn->flags))
1358 /* An authenticated FIPS approved combination key has sufficient
1359 * security for security level 4. */
1360 if (conn->key_type == HCI_LK_AUTH_COMBINATION_P256 &&
1361 sec_level == BT_SECURITY_FIPS)
1364 /* An authenticated combination key has sufficient security for
1365 security level 3. */
1366 if ((conn->key_type == HCI_LK_AUTH_COMBINATION_P192 ||
1367 conn->key_type == HCI_LK_AUTH_COMBINATION_P256) &&
1368 sec_level == BT_SECURITY_HIGH)
1371 /* An unauthenticated combination key has sufficient security for
1372 security level 1 and 2. */
1373 if ((conn->key_type == HCI_LK_UNAUTH_COMBINATION_P192 ||
1374 conn->key_type == HCI_LK_UNAUTH_COMBINATION_P256) &&
1375 (sec_level == BT_SECURITY_MEDIUM || sec_level == BT_SECURITY_LOW))
1378 /* A combination key has always sufficient security for the security
1379 levels 1 or 2. High security level requires the combination key
1380 is generated using maximum PIN code length (16).
1381 For pre 2.1 units. */
1382 if (conn->key_type == HCI_LK_COMBINATION &&
1383 (sec_level == BT_SECURITY_MEDIUM || sec_level == BT_SECURITY_LOW ||
1384 conn->pin_length == 16))
1388 if (test_bit(HCI_CONN_ENCRYPT_PEND, &conn->flags))
1392 set_bit(HCI_CONN_AUTH_INITIATOR, &conn->flags);
1394 if (!hci_conn_auth(conn, sec_level, auth_type))
1398 if (test_bit(HCI_CONN_ENCRYPT, &conn->flags)) {
1399 /* Ensure that the encryption key size has been read,
1400 * otherwise stall the upper layer responses.
1402 if (!conn->enc_key_size)
1405 /* Nothing else needed, all requirements are met */
1409 hci_conn_encrypt(conn);
1412 EXPORT_SYMBOL(hci_conn_security);
1414 /* Check secure link requirement */
1415 int hci_conn_check_secure(struct hci_conn *conn, __u8 sec_level)
1417 BT_DBG("hcon %p", conn);
1419 /* Accept if non-secure or higher security level is required */
1420 if (sec_level != BT_SECURITY_HIGH && sec_level != BT_SECURITY_FIPS)
1423 /* Accept if secure or higher security level is already present */
1424 if (conn->sec_level == BT_SECURITY_HIGH ||
1425 conn->sec_level == BT_SECURITY_FIPS)
1428 /* Reject not secure link */
1431 EXPORT_SYMBOL(hci_conn_check_secure);
1434 int hci_conn_switch_role(struct hci_conn *conn, __u8 role)
1436 BT_DBG("hcon %p", conn);
1438 if (role == conn->role)
1441 if (!test_and_set_bit(HCI_CONN_RSWITCH_PEND, &conn->flags)) {
1442 struct hci_cp_switch_role cp;
1443 bacpy(&cp.bdaddr, &conn->dst);
1445 hci_send_cmd(conn->hdev, HCI_OP_SWITCH_ROLE, sizeof(cp), &cp);
1450 EXPORT_SYMBOL(hci_conn_switch_role);
1452 /* Enter active mode */
1453 void hci_conn_enter_active_mode(struct hci_conn *conn, __u8 force_active)
1455 struct hci_dev *hdev = conn->hdev;
1457 BT_DBG("hcon %p mode %d", conn, conn->mode);
1459 if (conn->mode != HCI_CM_SNIFF)
1462 if (!test_bit(HCI_CONN_POWER_SAVE, &conn->flags) && !force_active)
1465 if (!test_and_set_bit(HCI_CONN_MODE_CHANGE_PEND, &conn->flags)) {
1466 struct hci_cp_exit_sniff_mode cp;
1467 cp.handle = cpu_to_le16(conn->handle);
1468 hci_send_cmd(hdev, HCI_OP_EXIT_SNIFF_MODE, sizeof(cp), &cp);
1472 if (hdev->idle_timeout > 0)
1473 queue_delayed_work(hdev->workqueue, &conn->idle_work,
1474 msecs_to_jiffies(hdev->idle_timeout));
1477 /* Drop all connection on the device */
1478 void hci_conn_hash_flush(struct hci_dev *hdev)
1480 struct hci_conn_hash *h = &hdev->conn_hash;
1481 struct hci_conn *c, *n;
1483 BT_DBG("hdev %s", hdev->name);
1485 list_for_each_entry_safe(c, n, &h->list, list) {
1486 c->state = BT_CLOSED;
1488 hci_disconn_cfm(c, HCI_ERROR_LOCAL_HOST_TERM);
1493 /* Check pending connect attempts */
1494 void hci_conn_check_pending(struct hci_dev *hdev)
1496 struct hci_conn *conn;
1498 BT_DBG("hdev %s", hdev->name);
1502 conn = hci_conn_hash_lookup_state(hdev, ACL_LINK, BT_CONNECT2);
1504 hci_acl_create_connection(conn);
1506 hci_dev_unlock(hdev);
1509 static u32 get_link_mode(struct hci_conn *conn)
1513 if (conn->role == HCI_ROLE_MASTER)
1514 link_mode |= HCI_LM_MASTER;
1516 if (test_bit(HCI_CONN_ENCRYPT, &conn->flags))
1517 link_mode |= HCI_LM_ENCRYPT;
1519 if (test_bit(HCI_CONN_AUTH, &conn->flags))
1520 link_mode |= HCI_LM_AUTH;
1522 if (test_bit(HCI_CONN_SECURE, &conn->flags))
1523 link_mode |= HCI_LM_SECURE;
1525 if (test_bit(HCI_CONN_FIPS, &conn->flags))
1526 link_mode |= HCI_LM_FIPS;
1531 int hci_get_conn_list(void __user *arg)
1534 struct hci_conn_list_req req, *cl;
1535 struct hci_conn_info *ci;
1536 struct hci_dev *hdev;
1537 int n = 0, size, err;
1539 if (copy_from_user(&req, arg, sizeof(req)))
1542 if (!req.conn_num || req.conn_num > (PAGE_SIZE * 2) / sizeof(*ci))
1545 size = sizeof(req) + req.conn_num * sizeof(*ci);
1547 cl = kmalloc(size, GFP_KERNEL);
1551 hdev = hci_dev_get(req.dev_id);
1560 list_for_each_entry(c, &hdev->conn_hash.list, list) {
1561 bacpy(&(ci + n)->bdaddr, &c->dst);
1562 (ci + n)->handle = c->handle;
1563 (ci + n)->type = c->type;
1564 (ci + n)->out = c->out;
1565 (ci + n)->state = c->state;
1566 (ci + n)->link_mode = get_link_mode(c);
1567 if (++n >= req.conn_num)
1570 hci_dev_unlock(hdev);
1572 cl->dev_id = hdev->id;
1574 size = sizeof(req) + n * sizeof(*ci);
1578 err = copy_to_user(arg, cl, size);
1581 return err ? -EFAULT : 0;
1584 int hci_get_conn_info(struct hci_dev *hdev, void __user *arg)
1586 struct hci_conn_info_req req;
1587 struct hci_conn_info ci;
1588 struct hci_conn *conn;
1589 char __user *ptr = arg + sizeof(req);
1591 if (copy_from_user(&req, arg, sizeof(req)))
1595 conn = hci_conn_hash_lookup_ba(hdev, req.type, &req.bdaddr);
1597 bacpy(&ci.bdaddr, &conn->dst);
1598 ci.handle = conn->handle;
1599 ci.type = conn->type;
1601 ci.state = conn->state;
1602 ci.link_mode = get_link_mode(conn);
1604 hci_dev_unlock(hdev);
1609 return copy_to_user(ptr, &ci, sizeof(ci)) ? -EFAULT : 0;
1612 int hci_get_auth_info(struct hci_dev *hdev, void __user *arg)
1614 struct hci_auth_info_req req;
1615 struct hci_conn *conn;
1617 if (copy_from_user(&req, arg, sizeof(req)))
1621 conn = hci_conn_hash_lookup_ba(hdev, ACL_LINK, &req.bdaddr);
1623 req.type = conn->auth_type;
1624 hci_dev_unlock(hdev);
1629 return copy_to_user(arg, &req, sizeof(req)) ? -EFAULT : 0;
1632 struct hci_chan *hci_chan_create(struct hci_conn *conn)
1634 struct hci_dev *hdev = conn->hdev;
1635 struct hci_chan *chan;
1637 BT_DBG("%s hcon %p", hdev->name, conn);
1639 if (test_bit(HCI_CONN_DROP, &conn->flags)) {
1640 BT_DBG("Refusing to create new hci_chan");
1644 chan = kzalloc(sizeof(*chan), GFP_KERNEL);
1648 chan->conn = hci_conn_get(conn);
1649 skb_queue_head_init(&chan->data_q);
1650 chan->state = BT_CONNECTED;
1652 list_add_rcu(&chan->list, &conn->chan_list);
1657 void hci_chan_del(struct hci_chan *chan)
1659 struct hci_conn *conn = chan->conn;
1660 struct hci_dev *hdev = conn->hdev;
1662 BT_DBG("%s hcon %p chan %p", hdev->name, conn, chan);
1664 list_del_rcu(&chan->list);
1668 /* Prevent new hci_chan's to be created for this hci_conn */
1669 set_bit(HCI_CONN_DROP, &conn->flags);
1673 skb_queue_purge(&chan->data_q);
1677 void hci_chan_list_flush(struct hci_conn *conn)
1679 struct hci_chan *chan, *n;
1681 BT_DBG("hcon %p", conn);
1683 list_for_each_entry_safe(chan, n, &conn->chan_list, list)
1687 static struct hci_chan *__hci_chan_lookup_handle(struct hci_conn *hcon,
1690 struct hci_chan *hchan;
1692 list_for_each_entry(hchan, &hcon->chan_list, list) {
1693 if (hchan->handle == handle)
1700 struct hci_chan *hci_chan_lookup_handle(struct hci_dev *hdev, __u16 handle)
1702 struct hci_conn_hash *h = &hdev->conn_hash;
1703 struct hci_conn *hcon;
1704 struct hci_chan *hchan = NULL;
1708 list_for_each_entry_rcu(hcon, &h->list, list) {
1709 hchan = __hci_chan_lookup_handle(hcon, handle);