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>
29 #include <net/bluetooth/bluetooth.h>
30 #include <net/bluetooth/hci_core.h>
40 static const struct sco_param sco_param_cvsd[] = {
41 { EDR_ESCO_MASK & ~ESCO_2EV3, 0x000a }, /* S3 */
42 { EDR_ESCO_MASK & ~ESCO_2EV3, 0x0007 }, /* S2 */
43 { EDR_ESCO_MASK | ESCO_EV3, 0x0007 }, /* S1 */
44 { EDR_ESCO_MASK | ESCO_HV3, 0xffff }, /* D1 */
45 { EDR_ESCO_MASK | ESCO_HV1, 0xffff }, /* D0 */
48 static const struct sco_param sco_param_wideband[] = {
49 { EDR_ESCO_MASK & ~ESCO_2EV3, 0x000d }, /* T2 */
50 { EDR_ESCO_MASK | ESCO_EV3, 0x0008 }, /* T1 */
53 static void hci_le_create_connection_cancel(struct hci_conn *conn)
55 hci_send_cmd(conn->hdev, HCI_OP_LE_CREATE_CONN_CANCEL, 0, NULL);
58 static void hci_acl_create_connection(struct hci_conn *conn)
60 struct hci_dev *hdev = conn->hdev;
61 struct inquiry_entry *ie;
62 struct hci_cp_create_conn cp;
64 BT_DBG("hcon %p", conn);
66 conn->state = BT_CONNECT;
69 conn->link_mode = HCI_LM_MASTER;
73 conn->link_policy = hdev->link_policy;
75 memset(&cp, 0, sizeof(cp));
76 bacpy(&cp.bdaddr, &conn->dst);
77 cp.pscan_rep_mode = 0x02;
79 ie = hci_inquiry_cache_lookup(hdev, &conn->dst);
81 if (inquiry_entry_age(ie) <= INQUIRY_ENTRY_AGE_MAX) {
82 cp.pscan_rep_mode = ie->data.pscan_rep_mode;
83 cp.pscan_mode = ie->data.pscan_mode;
84 cp.clock_offset = ie->data.clock_offset |
85 __constant_cpu_to_le16(0x8000);
88 memcpy(conn->dev_class, ie->data.dev_class, 3);
89 if (ie->data.ssp_mode > 0)
90 set_bit(HCI_CONN_SSP_ENABLED, &conn->flags);
93 cp.pkt_type = cpu_to_le16(conn->pkt_type);
94 if (lmp_rswitch_capable(hdev) && !(hdev->link_mode & HCI_LM_MASTER))
95 cp.role_switch = 0x01;
97 cp.role_switch = 0x00;
99 hci_send_cmd(hdev, HCI_OP_CREATE_CONN, sizeof(cp), &cp);
102 static void hci_acl_create_connection_cancel(struct hci_conn *conn)
104 struct hci_cp_create_conn_cancel cp;
106 BT_DBG("hcon %p", conn);
108 if (conn->hdev->hci_ver < BLUETOOTH_VER_1_2)
111 bacpy(&cp.bdaddr, &conn->dst);
112 hci_send_cmd(conn->hdev, HCI_OP_CREATE_CONN_CANCEL, sizeof(cp), &cp);
115 static void hci_reject_sco(struct hci_conn *conn)
117 struct hci_cp_reject_sync_conn_req cp;
119 cp.reason = HCI_ERROR_REMOTE_USER_TERM;
120 bacpy(&cp.bdaddr, &conn->dst);
122 hci_send_cmd(conn->hdev, HCI_OP_REJECT_SYNC_CONN_REQ, sizeof(cp), &cp);
125 void hci_disconnect(struct hci_conn *conn, __u8 reason)
127 struct hci_cp_disconnect cp;
129 BT_DBG("hcon %p", conn);
131 conn->state = BT_DISCONN;
133 cp.handle = cpu_to_le16(conn->handle);
135 hci_send_cmd(conn->hdev, HCI_OP_DISCONNECT, sizeof(cp), &cp);
138 static void hci_amp_disconn(struct hci_conn *conn, __u8 reason)
140 struct hci_cp_disconn_phy_link cp;
142 BT_DBG("hcon %p", conn);
144 conn->state = BT_DISCONN;
146 cp.phy_handle = HCI_PHY_HANDLE(conn->handle);
148 hci_send_cmd(conn->hdev, HCI_OP_DISCONN_PHY_LINK,
152 static void hci_add_sco(struct hci_conn *conn, __u16 handle)
154 struct hci_dev *hdev = conn->hdev;
155 struct hci_cp_add_sco cp;
157 BT_DBG("hcon %p", conn);
159 conn->state = BT_CONNECT;
164 cp.handle = cpu_to_le16(handle);
165 cp.pkt_type = cpu_to_le16(conn->pkt_type);
167 hci_send_cmd(hdev, HCI_OP_ADD_SCO, sizeof(cp), &cp);
170 bool hci_setup_sync(struct hci_conn *conn, __u16 handle)
172 struct hci_dev *hdev = conn->hdev;
173 struct hci_cp_setup_sync_conn cp;
174 const struct sco_param *param;
176 BT_DBG("hcon %p", conn);
178 conn->state = BT_CONNECT;
183 cp.handle = cpu_to_le16(handle);
185 cp.tx_bandwidth = __constant_cpu_to_le32(0x00001f40);
186 cp.rx_bandwidth = __constant_cpu_to_le32(0x00001f40);
187 cp.voice_setting = cpu_to_le16(conn->setting);
189 switch (conn->setting & SCO_AIRMODE_MASK) {
190 case SCO_AIRMODE_TRANSP:
191 if (conn->attempt > ARRAY_SIZE(sco_param_wideband))
193 cp.retrans_effort = 0x02;
194 param = &sco_param_wideband[conn->attempt - 1];
196 case SCO_AIRMODE_CVSD:
197 if (conn->attempt > ARRAY_SIZE(sco_param_cvsd))
199 cp.retrans_effort = 0x01;
200 param = &sco_param_cvsd[conn->attempt - 1];
206 cp.pkt_type = __cpu_to_le16(param->pkt_type);
207 cp.max_latency = __cpu_to_le16(param->max_latency);
209 if (hci_send_cmd(hdev, HCI_OP_SETUP_SYNC_CONN, sizeof(cp), &cp) < 0)
215 void hci_le_conn_update(struct hci_conn *conn, u16 min, u16 max,
216 u16 latency, u16 to_multiplier)
218 struct hci_cp_le_conn_update cp;
219 struct hci_dev *hdev = conn->hdev;
221 memset(&cp, 0, sizeof(cp));
223 cp.handle = cpu_to_le16(conn->handle);
224 cp.conn_interval_min = cpu_to_le16(min);
225 cp.conn_interval_max = cpu_to_le16(max);
226 cp.conn_latency = cpu_to_le16(latency);
227 cp.supervision_timeout = cpu_to_le16(to_multiplier);
228 cp.min_ce_len = __constant_cpu_to_le16(0x0000);
229 cp.max_ce_len = __constant_cpu_to_le16(0x0000);
231 hci_send_cmd(hdev, HCI_OP_LE_CONN_UPDATE, sizeof(cp), &cp);
234 void hci_le_start_enc(struct hci_conn *conn, __le16 ediv, __le64 rand,
237 struct hci_dev *hdev = conn->hdev;
238 struct hci_cp_le_start_enc cp;
240 BT_DBG("hcon %p", conn);
242 memset(&cp, 0, sizeof(cp));
244 cp.handle = cpu_to_le16(conn->handle);
247 memcpy(cp.ltk, ltk, sizeof(cp.ltk));
249 hci_send_cmd(hdev, HCI_OP_LE_START_ENC, sizeof(cp), &cp);
252 /* Device _must_ be locked */
253 void hci_sco_setup(struct hci_conn *conn, __u8 status)
255 struct hci_conn *sco = conn->link;
260 BT_DBG("hcon %p", conn);
263 if (lmp_esco_capable(conn->hdev))
264 hci_setup_sync(sco, conn->handle);
266 hci_add_sco(sco, conn->handle);
268 hci_proto_connect_cfm(sco, status);
273 static void hci_conn_disconnect(struct hci_conn *conn)
275 __u8 reason = hci_proto_disconn_ind(conn);
277 switch (conn->type) {
279 hci_amp_disconn(conn, reason);
282 hci_disconnect(conn, reason);
287 static void hci_conn_timeout(struct work_struct *work)
289 struct hci_conn *conn = container_of(work, struct hci_conn,
292 BT_DBG("hcon %p state %s", conn, state_to_string(conn->state));
294 if (atomic_read(&conn->refcnt))
297 switch (conn->state) {
301 if (conn->type == ACL_LINK)
302 hci_acl_create_connection_cancel(conn);
303 else if (conn->type == LE_LINK)
304 hci_le_create_connection_cancel(conn);
305 } else if (conn->type == SCO_LINK || conn->type == ESCO_LINK) {
306 hci_reject_sco(conn);
311 hci_conn_disconnect(conn);
314 conn->state = BT_CLOSED;
319 /* Enter sniff mode */
320 static void hci_conn_idle(struct work_struct *work)
322 struct hci_conn *conn = container_of(work, struct hci_conn,
324 struct hci_dev *hdev = conn->hdev;
326 BT_DBG("hcon %p mode %d", conn, conn->mode);
328 if (test_bit(HCI_RAW, &hdev->flags))
331 if (!lmp_sniff_capable(hdev) || !lmp_sniff_capable(conn))
334 if (conn->mode != HCI_CM_ACTIVE || !(conn->link_policy & HCI_LP_SNIFF))
337 if (lmp_sniffsubr_capable(hdev) && lmp_sniffsubr_capable(conn)) {
338 struct hci_cp_sniff_subrate cp;
339 cp.handle = cpu_to_le16(conn->handle);
340 cp.max_latency = __constant_cpu_to_le16(0);
341 cp.min_remote_timeout = __constant_cpu_to_le16(0);
342 cp.min_local_timeout = __constant_cpu_to_le16(0);
343 hci_send_cmd(hdev, HCI_OP_SNIFF_SUBRATE, sizeof(cp), &cp);
346 if (!test_and_set_bit(HCI_CONN_MODE_CHANGE_PEND, &conn->flags)) {
347 struct hci_cp_sniff_mode cp;
348 cp.handle = cpu_to_le16(conn->handle);
349 cp.max_interval = cpu_to_le16(hdev->sniff_max_interval);
350 cp.min_interval = cpu_to_le16(hdev->sniff_min_interval);
351 cp.attempt = __constant_cpu_to_le16(4);
352 cp.timeout = __constant_cpu_to_le16(1);
353 hci_send_cmd(hdev, HCI_OP_SNIFF_MODE, sizeof(cp), &cp);
357 static void hci_conn_auto_accept(struct work_struct *work)
359 struct hci_conn *conn = container_of(work, struct hci_conn,
360 auto_accept_work.work);
362 hci_send_cmd(conn->hdev, HCI_OP_USER_CONFIRM_REPLY, sizeof(conn->dst),
366 static void le_conn_timeout(struct work_struct *work)
368 struct hci_conn *conn = container_of(work, struct hci_conn,
369 le_conn_timeout.work);
373 hci_le_create_connection_cancel(conn);
376 struct hci_conn *hci_conn_add(struct hci_dev *hdev, int type, bdaddr_t *dst)
378 struct hci_conn *conn;
380 BT_DBG("%s dst %pMR", hdev->name, dst);
382 conn = kzalloc(sizeof(struct hci_conn), GFP_KERNEL);
386 bacpy(&conn->dst, dst);
387 bacpy(&conn->src, &hdev->bdaddr);
390 conn->mode = HCI_CM_ACTIVE;
391 conn->state = BT_OPEN;
392 conn->auth_type = HCI_AT_GENERAL_BONDING;
393 conn->io_capability = hdev->io_capability;
394 conn->remote_auth = 0xff;
395 conn->key_type = 0xff;
397 set_bit(HCI_CONN_POWER_SAVE, &conn->flags);
398 conn->disc_timeout = HCI_DISCONN_TIMEOUT;
402 conn->pkt_type = hdev->pkt_type & ACL_PTYPE_MASK;
405 if (lmp_esco_capable(hdev))
406 conn->pkt_type = (hdev->esco_type & SCO_ESCO_MASK) |
407 (hdev->esco_type & EDR_ESCO_MASK);
409 conn->pkt_type = hdev->pkt_type & SCO_PTYPE_MASK;
412 conn->pkt_type = hdev->esco_type & ~EDR_ESCO_MASK;
416 skb_queue_head_init(&conn->data_q);
418 INIT_LIST_HEAD(&conn->chan_list);
420 INIT_DELAYED_WORK(&conn->disc_work, hci_conn_timeout);
421 INIT_DELAYED_WORK(&conn->auto_accept_work, hci_conn_auto_accept);
422 INIT_DELAYED_WORK(&conn->idle_work, hci_conn_idle);
423 INIT_DELAYED_WORK(&conn->le_conn_timeout, le_conn_timeout);
425 atomic_set(&conn->refcnt, 0);
429 hci_conn_hash_add(hdev, conn);
431 hdev->notify(hdev, HCI_NOTIFY_CONN_ADD);
433 hci_conn_init_sysfs(conn);
438 int hci_conn_del(struct hci_conn *conn)
440 struct hci_dev *hdev = conn->hdev;
442 BT_DBG("%s hcon %p handle %d", hdev->name, conn, conn->handle);
444 cancel_delayed_work_sync(&conn->disc_work);
445 cancel_delayed_work_sync(&conn->auto_accept_work);
446 cancel_delayed_work_sync(&conn->idle_work);
448 if (conn->type == ACL_LINK) {
449 struct hci_conn *sco = conn->link;
454 hdev->acl_cnt += conn->sent;
455 } else if (conn->type == LE_LINK) {
456 cancel_delayed_work_sync(&conn->le_conn_timeout);
459 hdev->le_cnt += conn->sent;
461 hdev->acl_cnt += conn->sent;
463 struct hci_conn *acl = conn->link;
470 hci_chan_list_flush(conn);
473 amp_mgr_put(conn->amp_mgr);
475 hci_conn_hash_del(hdev, conn);
477 hdev->notify(hdev, HCI_NOTIFY_CONN_DEL);
479 skb_queue_purge(&conn->data_q);
481 hci_conn_del_sysfs(conn);
490 struct hci_dev *hci_get_route(bdaddr_t *dst, bdaddr_t *src)
492 int use_src = bacmp(src, BDADDR_ANY);
493 struct hci_dev *hdev = NULL, *d;
495 BT_DBG("%pMR -> %pMR", src, dst);
497 read_lock(&hci_dev_list_lock);
499 list_for_each_entry(d, &hci_dev_list, list) {
500 if (!test_bit(HCI_UP, &d->flags) ||
501 test_bit(HCI_RAW, &d->flags) ||
502 test_bit(HCI_USER_CHANNEL, &d->dev_flags) ||
503 d->dev_type != HCI_BREDR)
507 * No source address - find interface with bdaddr != dst
508 * Source address - find interface with bdaddr == src
512 if (!bacmp(&d->bdaddr, src)) {
516 if (bacmp(&d->bdaddr, dst)) {
523 hdev = hci_dev_hold(hdev);
525 read_unlock(&hci_dev_list_lock);
528 EXPORT_SYMBOL(hci_get_route);
530 /* This function requires the caller holds hdev->lock */
531 void hci_le_conn_failed(struct hci_conn *conn, u8 status)
533 struct hci_dev *hdev = conn->hdev;
535 conn->state = BT_CLOSED;
537 mgmt_connect_failed(hdev, &conn->dst, conn->type, conn->dst_type,
540 hci_proto_connect_cfm(conn, status);
544 /* Since we may have temporarily stopped the background scanning in
545 * favor of connection establishment, we should restart it.
547 hci_update_background_scan(hdev);
550 static void create_le_conn_complete(struct hci_dev *hdev, u8 status)
552 struct hci_conn *conn;
557 BT_ERR("HCI request failed to create LE connection: status 0x%2.2x",
562 conn = hci_conn_hash_lookup_state(hdev, LE_LINK, BT_CONNECT);
566 hci_le_conn_failed(conn, status);
569 hci_dev_unlock(hdev);
572 static void hci_req_add_le_create_conn(struct hci_request *req,
573 struct hci_conn *conn)
575 struct hci_cp_le_create_conn cp;
576 struct hci_dev *hdev = conn->hdev;
579 memset(&cp, 0, sizeof(cp));
581 /* Update random address, but set require_privacy to false so
582 * that we never connect with an unresolvable address.
584 if (hci_update_random_address(req, false, &own_addr_type))
587 /* Save the address type used for this connnection attempt so we able
588 * to retrieve this information if we need it.
590 conn->src_type = own_addr_type;
592 cp.scan_interval = cpu_to_le16(hdev->le_scan_interval);
593 cp.scan_window = cpu_to_le16(hdev->le_scan_window);
594 bacpy(&cp.peer_addr, &conn->dst);
595 cp.peer_addr_type = conn->dst_type;
596 cp.own_address_type = own_addr_type;
597 cp.conn_interval_min = cpu_to_le16(conn->le_conn_min_interval);
598 cp.conn_interval_max = cpu_to_le16(conn->le_conn_max_interval);
599 cp.supervision_timeout = __constant_cpu_to_le16(0x002a);
600 cp.min_ce_len = __constant_cpu_to_le16(0x0000);
601 cp.max_ce_len = __constant_cpu_to_le16(0x0000);
603 hci_req_add(req, HCI_OP_LE_CREATE_CONN, sizeof(cp), &cp);
605 conn->state = BT_CONNECT;
608 struct hci_conn *hci_connect_le(struct hci_dev *hdev, bdaddr_t *dst,
609 u8 dst_type, u8 sec_level, u8 auth_type)
611 struct hci_conn_params *params;
612 struct hci_conn *conn;
614 struct hci_request req;
617 if (test_bit(HCI_ADVERTISING, &hdev->flags))
618 return ERR_PTR(-ENOTSUPP);
620 /* Some devices send ATT messages as soon as the physical link is
621 * established. To be able to handle these ATT messages, the user-
622 * space first establishes the connection and then starts the pairing
625 * So if a hci_conn object already exists for the following connection
626 * attempt, we simply update pending_sec_level and auth_type fields
627 * and return the object found.
629 conn = hci_conn_hash_lookup_ba(hdev, LE_LINK, dst);
631 conn->pending_sec_level = sec_level;
632 conn->auth_type = auth_type;
636 /* Since the controller supports only one LE connection attempt at a
637 * time, we return -EBUSY if there is any connection attempt running.
639 conn = hci_conn_hash_lookup_state(hdev, LE_LINK, BT_CONNECT);
641 return ERR_PTR(-EBUSY);
643 /* When given an identity address with existing identity
644 * resolving key, the connection needs to be established
645 * to a resolvable random address.
647 * This uses the cached random resolvable address from
648 * a previous scan. When no cached address is available,
649 * try connecting to the identity address instead.
651 * Storing the resolvable random address is required here
652 * to handle connection failures. The address will later
653 * be resolved back into the original identity address
654 * from the connect request.
656 irk = hci_find_irk_by_addr(hdev, dst, dst_type);
657 if (irk && bacmp(&irk->rpa, BDADDR_ANY)) {
659 dst_type = ADDR_LE_DEV_RANDOM;
662 conn = hci_conn_add(hdev, LE_LINK, dst);
664 return ERR_PTR(-ENOMEM);
666 conn->dst_type = dst_type;
669 conn->link_mode |= HCI_LM_MASTER;
670 conn->sec_level = BT_SECURITY_LOW;
671 conn->pending_sec_level = sec_level;
672 conn->auth_type = auth_type;
674 params = hci_conn_params_lookup(hdev, &conn->dst, conn->dst_type);
676 conn->le_conn_min_interval = params->conn_min_interval;
677 conn->le_conn_max_interval = params->conn_max_interval;
679 conn->le_conn_min_interval = hdev->le_conn_min_interval;
680 conn->le_conn_max_interval = hdev->le_conn_max_interval;
683 hci_req_init(&req, hdev);
685 /* If controller is scanning, we stop it since some controllers are
686 * not able to scan and connect at the same time. Also set the
687 * HCI_LE_SCAN_INTERRUPTED flag so that the command complete
688 * handler for scan disabling knows to set the correct discovery
691 if (test_bit(HCI_LE_SCAN, &hdev->dev_flags)) {
692 hci_req_add_le_scan_disable(&req);
693 set_bit(HCI_LE_SCAN_INTERRUPTED, &hdev->dev_flags);
696 hci_req_add_le_create_conn(&req, conn);
698 err = hci_req_run(&req, create_le_conn_complete);
709 struct hci_conn *hci_connect_acl(struct hci_dev *hdev, bdaddr_t *dst,
710 u8 sec_level, u8 auth_type)
712 struct hci_conn *acl;
714 if (!test_bit(HCI_BREDR_ENABLED, &hdev->dev_flags))
715 return ERR_PTR(-ENOTSUPP);
717 acl = hci_conn_hash_lookup_ba(hdev, ACL_LINK, dst);
719 acl = hci_conn_add(hdev, ACL_LINK, dst);
721 return ERR_PTR(-ENOMEM);
726 if (acl->state == BT_OPEN || acl->state == BT_CLOSED) {
727 acl->sec_level = BT_SECURITY_LOW;
728 acl->pending_sec_level = sec_level;
729 acl->auth_type = auth_type;
730 hci_acl_create_connection(acl);
736 struct hci_conn *hci_connect_sco(struct hci_dev *hdev, int type, bdaddr_t *dst,
739 struct hci_conn *acl;
740 struct hci_conn *sco;
742 acl = hci_connect_acl(hdev, dst, BT_SECURITY_LOW, HCI_AT_NO_BONDING);
746 sco = hci_conn_hash_lookup_ba(hdev, type, dst);
748 sco = hci_conn_add(hdev, type, dst);
751 return ERR_PTR(-ENOMEM);
760 sco->setting = setting;
762 if (acl->state == BT_CONNECTED &&
763 (sco->state == BT_OPEN || sco->state == BT_CLOSED)) {
764 set_bit(HCI_CONN_POWER_SAVE, &acl->flags);
765 hci_conn_enter_active_mode(acl, BT_POWER_FORCE_ACTIVE_ON);
767 if (test_bit(HCI_CONN_MODE_CHANGE_PEND, &acl->flags)) {
768 /* defer SCO setup until mode change completed */
769 set_bit(HCI_CONN_SCO_SETUP_PEND, &acl->flags);
773 hci_sco_setup(acl, 0x00);
779 /* Check link security requirement */
780 int hci_conn_check_link_mode(struct hci_conn *conn)
782 BT_DBG("hcon %p", conn);
784 if (hci_conn_ssp_enabled(conn) && !(conn->link_mode & HCI_LM_ENCRYPT))
790 /* Authenticate remote device */
791 static int hci_conn_auth(struct hci_conn *conn, __u8 sec_level, __u8 auth_type)
793 BT_DBG("hcon %p", conn);
795 if (conn->pending_sec_level > sec_level)
796 sec_level = conn->pending_sec_level;
798 if (sec_level > conn->sec_level)
799 conn->pending_sec_level = sec_level;
800 else if (conn->link_mode & HCI_LM_AUTH)
803 /* Make sure we preserve an existing MITM requirement*/
804 auth_type |= (conn->auth_type & 0x01);
806 conn->auth_type = auth_type;
808 if (!test_and_set_bit(HCI_CONN_AUTH_PEND, &conn->flags)) {
809 struct hci_cp_auth_requested cp;
811 /* encrypt must be pending if auth is also pending */
812 set_bit(HCI_CONN_ENCRYPT_PEND, &conn->flags);
814 cp.handle = cpu_to_le16(conn->handle);
815 hci_send_cmd(conn->hdev, HCI_OP_AUTH_REQUESTED,
817 if (conn->key_type != 0xff)
818 set_bit(HCI_CONN_REAUTH_PEND, &conn->flags);
824 /* Encrypt the the link */
825 static void hci_conn_encrypt(struct hci_conn *conn)
827 BT_DBG("hcon %p", conn);
829 if (!test_and_set_bit(HCI_CONN_ENCRYPT_PEND, &conn->flags)) {
830 struct hci_cp_set_conn_encrypt cp;
831 cp.handle = cpu_to_le16(conn->handle);
833 hci_send_cmd(conn->hdev, HCI_OP_SET_CONN_ENCRYPT, sizeof(cp),
838 /* Enable security */
839 int hci_conn_security(struct hci_conn *conn, __u8 sec_level, __u8 auth_type)
841 BT_DBG("hcon %p", conn);
843 if (conn->type == LE_LINK)
844 return smp_conn_security(conn, sec_level);
846 /* For sdp we don't need the link key. */
847 if (sec_level == BT_SECURITY_SDP)
850 /* For non 2.1 devices and low security level we don't need the link
852 if (sec_level == BT_SECURITY_LOW && !hci_conn_ssp_enabled(conn))
855 /* For other security levels we need the link key. */
856 if (!(conn->link_mode & HCI_LM_AUTH))
859 /* An authenticated FIPS approved combination key has sufficient
860 * security for security level 4. */
861 if (conn->key_type == HCI_LK_AUTH_COMBINATION_P256 &&
862 sec_level == BT_SECURITY_FIPS)
865 /* An authenticated combination key has sufficient security for
867 if ((conn->key_type == HCI_LK_AUTH_COMBINATION_P192 ||
868 conn->key_type == HCI_LK_AUTH_COMBINATION_P256) &&
869 sec_level == BT_SECURITY_HIGH)
872 /* An unauthenticated combination key has sufficient security for
873 security level 1 and 2. */
874 if ((conn->key_type == HCI_LK_UNAUTH_COMBINATION_P192 ||
875 conn->key_type == HCI_LK_UNAUTH_COMBINATION_P256) &&
876 (sec_level == BT_SECURITY_MEDIUM || sec_level == BT_SECURITY_LOW))
879 /* A combination key has always sufficient security for the security
880 levels 1 or 2. High security level requires the combination key
881 is generated using maximum PIN code length (16).
882 For pre 2.1 units. */
883 if (conn->key_type == HCI_LK_COMBINATION &&
884 (sec_level == BT_SECURITY_MEDIUM || sec_level == BT_SECURITY_LOW ||
885 conn->pin_length == 16))
889 if (test_bit(HCI_CONN_ENCRYPT_PEND, &conn->flags))
892 if (!hci_conn_auth(conn, sec_level, auth_type))
896 if (conn->link_mode & HCI_LM_ENCRYPT)
899 hci_conn_encrypt(conn);
902 EXPORT_SYMBOL(hci_conn_security);
904 /* Check secure link requirement */
905 int hci_conn_check_secure(struct hci_conn *conn, __u8 sec_level)
907 BT_DBG("hcon %p", conn);
909 /* Accept if non-secure or higher security level is required */
910 if (sec_level != BT_SECURITY_HIGH && sec_level != BT_SECURITY_FIPS)
913 /* Accept if secure or higher security level is already present */
914 if (conn->sec_level == BT_SECURITY_HIGH ||
915 conn->sec_level == BT_SECURITY_FIPS)
918 /* Reject not secure link */
921 EXPORT_SYMBOL(hci_conn_check_secure);
923 /* Change link key */
924 int hci_conn_change_link_key(struct hci_conn *conn)
926 BT_DBG("hcon %p", conn);
928 if (!test_and_set_bit(HCI_CONN_AUTH_PEND, &conn->flags)) {
929 struct hci_cp_change_conn_link_key cp;
930 cp.handle = cpu_to_le16(conn->handle);
931 hci_send_cmd(conn->hdev, HCI_OP_CHANGE_CONN_LINK_KEY,
939 int hci_conn_switch_role(struct hci_conn *conn, __u8 role)
941 BT_DBG("hcon %p", conn);
943 if (!role && conn->link_mode & HCI_LM_MASTER)
946 if (!test_and_set_bit(HCI_CONN_RSWITCH_PEND, &conn->flags)) {
947 struct hci_cp_switch_role cp;
948 bacpy(&cp.bdaddr, &conn->dst);
950 hci_send_cmd(conn->hdev, HCI_OP_SWITCH_ROLE, sizeof(cp), &cp);
955 EXPORT_SYMBOL(hci_conn_switch_role);
957 /* Enter active mode */
958 void hci_conn_enter_active_mode(struct hci_conn *conn, __u8 force_active)
960 struct hci_dev *hdev = conn->hdev;
962 BT_DBG("hcon %p mode %d", conn, conn->mode);
964 if (test_bit(HCI_RAW, &hdev->flags))
967 if (conn->mode != HCI_CM_SNIFF)
970 if (!test_bit(HCI_CONN_POWER_SAVE, &conn->flags) && !force_active)
973 if (!test_and_set_bit(HCI_CONN_MODE_CHANGE_PEND, &conn->flags)) {
974 struct hci_cp_exit_sniff_mode cp;
975 cp.handle = cpu_to_le16(conn->handle);
976 hci_send_cmd(hdev, HCI_OP_EXIT_SNIFF_MODE, sizeof(cp), &cp);
980 if (hdev->idle_timeout > 0)
981 queue_delayed_work(hdev->workqueue, &conn->idle_work,
982 msecs_to_jiffies(hdev->idle_timeout));
985 /* Drop all connection on the device */
986 void hci_conn_hash_flush(struct hci_dev *hdev)
988 struct hci_conn_hash *h = &hdev->conn_hash;
989 struct hci_conn *c, *n;
991 BT_DBG("hdev %s", hdev->name);
993 list_for_each_entry_safe(c, n, &h->list, list) {
994 c->state = BT_CLOSED;
996 hci_proto_disconn_cfm(c, HCI_ERROR_LOCAL_HOST_TERM);
1001 /* Check pending connect attempts */
1002 void hci_conn_check_pending(struct hci_dev *hdev)
1004 struct hci_conn *conn;
1006 BT_DBG("hdev %s", hdev->name);
1010 conn = hci_conn_hash_lookup_state(hdev, ACL_LINK, BT_CONNECT2);
1012 hci_acl_create_connection(conn);
1014 hci_dev_unlock(hdev);
1017 int hci_get_conn_list(void __user *arg)
1020 struct hci_conn_list_req req, *cl;
1021 struct hci_conn_info *ci;
1022 struct hci_dev *hdev;
1023 int n = 0, size, err;
1025 if (copy_from_user(&req, arg, sizeof(req)))
1028 if (!req.conn_num || req.conn_num > (PAGE_SIZE * 2) / sizeof(*ci))
1031 size = sizeof(req) + req.conn_num * sizeof(*ci);
1033 cl = kmalloc(size, GFP_KERNEL);
1037 hdev = hci_dev_get(req.dev_id);
1046 list_for_each_entry(c, &hdev->conn_hash.list, list) {
1047 bacpy(&(ci + n)->bdaddr, &c->dst);
1048 (ci + n)->handle = c->handle;
1049 (ci + n)->type = c->type;
1050 (ci + n)->out = c->out;
1051 (ci + n)->state = c->state;
1052 (ci + n)->link_mode = c->link_mode;
1053 if (++n >= req.conn_num)
1056 hci_dev_unlock(hdev);
1058 cl->dev_id = hdev->id;
1060 size = sizeof(req) + n * sizeof(*ci);
1064 err = copy_to_user(arg, cl, size);
1067 return err ? -EFAULT : 0;
1070 int hci_get_conn_info(struct hci_dev *hdev, void __user *arg)
1072 struct hci_conn_info_req req;
1073 struct hci_conn_info ci;
1074 struct hci_conn *conn;
1075 char __user *ptr = arg + sizeof(req);
1077 if (copy_from_user(&req, arg, sizeof(req)))
1081 conn = hci_conn_hash_lookup_ba(hdev, req.type, &req.bdaddr);
1083 bacpy(&ci.bdaddr, &conn->dst);
1084 ci.handle = conn->handle;
1085 ci.type = conn->type;
1087 ci.state = conn->state;
1088 ci.link_mode = conn->link_mode;
1090 hci_dev_unlock(hdev);
1095 return copy_to_user(ptr, &ci, sizeof(ci)) ? -EFAULT : 0;
1098 int hci_get_auth_info(struct hci_dev *hdev, void __user *arg)
1100 struct hci_auth_info_req req;
1101 struct hci_conn *conn;
1103 if (copy_from_user(&req, arg, sizeof(req)))
1107 conn = hci_conn_hash_lookup_ba(hdev, ACL_LINK, &req.bdaddr);
1109 req.type = conn->auth_type;
1110 hci_dev_unlock(hdev);
1115 return copy_to_user(arg, &req, sizeof(req)) ? -EFAULT : 0;
1118 struct hci_chan *hci_chan_create(struct hci_conn *conn)
1120 struct hci_dev *hdev = conn->hdev;
1121 struct hci_chan *chan;
1123 BT_DBG("%s hcon %p", hdev->name, conn);
1125 chan = kzalloc(sizeof(struct hci_chan), GFP_KERNEL);
1130 skb_queue_head_init(&chan->data_q);
1131 chan->state = BT_CONNECTED;
1133 list_add_rcu(&chan->list, &conn->chan_list);
1138 void hci_chan_del(struct hci_chan *chan)
1140 struct hci_conn *conn = chan->conn;
1141 struct hci_dev *hdev = conn->hdev;
1143 BT_DBG("%s hcon %p chan %p", hdev->name, conn, chan);
1145 list_del_rcu(&chan->list);
1149 hci_conn_drop(conn);
1151 skb_queue_purge(&chan->data_q);
1155 void hci_chan_list_flush(struct hci_conn *conn)
1157 struct hci_chan *chan, *n;
1159 BT_DBG("hcon %p", conn);
1161 list_for_each_entry_safe(chan, n, &conn->chan_list, list)
1165 static struct hci_chan *__hci_chan_lookup_handle(struct hci_conn *hcon,
1168 struct hci_chan *hchan;
1170 list_for_each_entry(hchan, &hcon->chan_list, list) {
1171 if (hchan->handle == handle)
1178 struct hci_chan *hci_chan_lookup_handle(struct hci_dev *hdev, __u16 handle)
1180 struct hci_conn_hash *h = &hdev->conn_hash;
1181 struct hci_conn *hcon;
1182 struct hci_chan *hchan = NULL;
1186 list_for_each_entry_rcu(hcon, &h->list, list) {
1187 hchan = __hci_chan_lookup_handle(hcon, handle);