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(0x0001);
229 cp.max_ce_len = __constant_cpu_to_le16(0x0001);
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, __u8 rand[8],
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);
245 memcpy(cp.ltk, ltk, sizeof(cp.ltk));
247 memcpy(cp.rand, rand, sizeof(cp.rand));
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 struct hci_conn *hci_conn_add(struct hci_dev *hdev, int type, bdaddr_t *dst)
368 struct hci_conn *conn;
370 BT_DBG("%s dst %pMR", hdev->name, dst);
372 conn = kzalloc(sizeof(struct hci_conn), GFP_KERNEL);
376 bacpy(&conn->dst, dst);
377 bacpy(&conn->src, &hdev->bdaddr);
380 conn->mode = HCI_CM_ACTIVE;
381 conn->state = BT_OPEN;
382 conn->auth_type = HCI_AT_GENERAL_BONDING;
383 conn->io_capability = hdev->io_capability;
384 conn->remote_auth = 0xff;
385 conn->key_type = 0xff;
387 set_bit(HCI_CONN_POWER_SAVE, &conn->flags);
388 conn->disc_timeout = HCI_DISCONN_TIMEOUT;
392 conn->pkt_type = hdev->pkt_type & ACL_PTYPE_MASK;
395 if (lmp_esco_capable(hdev))
396 conn->pkt_type = (hdev->esco_type & SCO_ESCO_MASK) |
397 (hdev->esco_type & EDR_ESCO_MASK);
399 conn->pkt_type = hdev->pkt_type & SCO_PTYPE_MASK;
402 conn->pkt_type = hdev->esco_type & ~EDR_ESCO_MASK;
406 skb_queue_head_init(&conn->data_q);
408 INIT_LIST_HEAD(&conn->chan_list);
410 INIT_DELAYED_WORK(&conn->disc_work, hci_conn_timeout);
411 INIT_DELAYED_WORK(&conn->auto_accept_work, hci_conn_auto_accept);
412 INIT_DELAYED_WORK(&conn->idle_work, hci_conn_idle);
414 atomic_set(&conn->refcnt, 0);
418 hci_conn_hash_add(hdev, conn);
420 hdev->notify(hdev, HCI_NOTIFY_CONN_ADD);
422 hci_conn_init_sysfs(conn);
427 int hci_conn_del(struct hci_conn *conn)
429 struct hci_dev *hdev = conn->hdev;
431 BT_DBG("%s hcon %p handle %d", hdev->name, conn, conn->handle);
433 cancel_delayed_work_sync(&conn->disc_work);
434 cancel_delayed_work_sync(&conn->auto_accept_work);
435 cancel_delayed_work_sync(&conn->idle_work);
437 if (conn->type == ACL_LINK) {
438 struct hci_conn *sco = conn->link;
443 hdev->acl_cnt += conn->sent;
444 } else if (conn->type == LE_LINK) {
446 hdev->le_cnt += conn->sent;
448 hdev->acl_cnt += conn->sent;
450 struct hci_conn *acl = conn->link;
457 hci_chan_list_flush(conn);
460 amp_mgr_put(conn->amp_mgr);
462 hci_conn_hash_del(hdev, conn);
464 hdev->notify(hdev, HCI_NOTIFY_CONN_DEL);
466 skb_queue_purge(&conn->data_q);
468 hci_conn_del_sysfs(conn);
477 struct hci_dev *hci_get_route(bdaddr_t *dst, bdaddr_t *src)
479 int use_src = bacmp(src, BDADDR_ANY);
480 struct hci_dev *hdev = NULL, *d;
482 BT_DBG("%pMR -> %pMR", src, dst);
484 read_lock(&hci_dev_list_lock);
486 list_for_each_entry(d, &hci_dev_list, list) {
487 if (!test_bit(HCI_UP, &d->flags) ||
488 test_bit(HCI_RAW, &d->flags) ||
489 test_bit(HCI_USER_CHANNEL, &d->dev_flags) ||
490 d->dev_type != HCI_BREDR)
494 * No source address - find interface with bdaddr != dst
495 * Source address - find interface with bdaddr == src
499 if (!bacmp(&d->bdaddr, src)) {
503 if (bacmp(&d->bdaddr, dst)) {
510 hdev = hci_dev_hold(hdev);
512 read_unlock(&hci_dev_list_lock);
515 EXPORT_SYMBOL(hci_get_route);
517 /* This function requires the caller holds hdev->lock */
518 static void le_conn_failed(struct hci_conn *conn, u8 status)
520 struct hci_dev *hdev = conn->hdev;
522 conn->state = BT_CLOSED;
524 mgmt_connect_failed(hdev, &conn->dst, conn->type, conn->dst_type,
527 hci_proto_connect_cfm(conn, status);
532 static void create_le_conn_complete(struct hci_dev *hdev, u8 status)
534 struct hci_conn *conn;
539 BT_ERR("HCI request failed to create LE connection: status 0x%2.2x",
544 conn = hci_conn_hash_lookup_state(hdev, LE_LINK, BT_CONNECT);
548 le_conn_failed(conn, status);
551 hci_dev_unlock(hdev);
554 static int hci_create_le_conn(struct hci_conn *conn)
556 struct hci_dev *hdev = conn->hdev;
557 struct hci_cp_le_create_conn cp;
558 struct hci_request req;
561 hci_req_init(&req, hdev);
563 memset(&cp, 0, sizeof(cp));
564 cp.scan_interval = cpu_to_le16(hdev->le_scan_interval);
565 cp.scan_window = cpu_to_le16(hdev->le_scan_window);
566 bacpy(&cp.peer_addr, &conn->dst);
567 cp.peer_addr_type = conn->dst_type;
568 cp.own_address_type = conn->src_type;
569 cp.conn_interval_min = cpu_to_le16(conn->le_conn_min_interval);
570 cp.conn_interval_max = cpu_to_le16(conn->le_conn_max_interval);
571 cp.supervision_timeout = __constant_cpu_to_le16(0x002a);
572 cp.min_ce_len = __constant_cpu_to_le16(0x0000);
573 cp.max_ce_len = __constant_cpu_to_le16(0x0000);
575 hci_req_add(&req, HCI_OP_LE_CREATE_CONN, sizeof(cp), &cp);
577 err = hci_req_run(&req, create_le_conn_complete);
586 static struct hci_conn *hci_connect_le(struct hci_dev *hdev, bdaddr_t *dst,
587 u8 dst_type, u8 sec_level, u8 auth_type)
589 struct hci_conn *conn;
592 if (test_bit(HCI_ADVERTISING, &hdev->flags))
593 return ERR_PTR(-ENOTSUPP);
595 /* Some devices send ATT messages as soon as the physical link is
596 * established. To be able to handle these ATT messages, the user-
597 * space first establishes the connection and then starts the pairing
600 * So if a hci_conn object already exists for the following connection
601 * attempt, we simply update pending_sec_level and auth_type fields
602 * and return the object found.
604 conn = hci_conn_hash_lookup_ba(hdev, LE_LINK, dst);
606 conn->pending_sec_level = sec_level;
607 conn->auth_type = auth_type;
611 /* Since the controller supports only one LE connection attempt at a
612 * time, we return -EBUSY if there is any connection attempt running.
614 conn = hci_conn_hash_lookup_state(hdev, LE_LINK, BT_CONNECT);
616 return ERR_PTR(-EBUSY);
618 conn = hci_conn_add(hdev, LE_LINK, dst);
620 return ERR_PTR(-ENOMEM);
622 if (dst_type == BDADDR_LE_PUBLIC)
623 conn->dst_type = ADDR_LE_DEV_PUBLIC;
625 conn->dst_type = ADDR_LE_DEV_RANDOM;
627 conn->src_type = hdev->own_addr_type;
629 conn->state = BT_CONNECT;
631 conn->link_mode |= HCI_LM_MASTER;
632 conn->sec_level = BT_SECURITY_LOW;
633 conn->pending_sec_level = sec_level;
634 conn->auth_type = auth_type;
635 conn->le_conn_min_interval = hdev->le_conn_min_interval;
636 conn->le_conn_max_interval = hdev->le_conn_max_interval;
638 err = hci_create_le_conn(conn);
647 static struct hci_conn *hci_connect_acl(struct hci_dev *hdev, bdaddr_t *dst,
648 u8 sec_level, u8 auth_type)
650 struct hci_conn *acl;
652 if (!test_bit(HCI_BREDR_ENABLED, &hdev->dev_flags))
653 return ERR_PTR(-ENOTSUPP);
655 acl = hci_conn_hash_lookup_ba(hdev, ACL_LINK, dst);
657 acl = hci_conn_add(hdev, ACL_LINK, dst);
659 return ERR_PTR(-ENOMEM);
664 if (acl->state == BT_OPEN || acl->state == BT_CLOSED) {
665 acl->sec_level = BT_SECURITY_LOW;
666 acl->pending_sec_level = sec_level;
667 acl->auth_type = auth_type;
668 hci_acl_create_connection(acl);
674 struct hci_conn *hci_connect_sco(struct hci_dev *hdev, int type, bdaddr_t *dst,
677 struct hci_conn *acl;
678 struct hci_conn *sco;
680 acl = hci_connect_acl(hdev, dst, BT_SECURITY_LOW, HCI_AT_NO_BONDING);
684 sco = hci_conn_hash_lookup_ba(hdev, type, dst);
686 sco = hci_conn_add(hdev, type, dst);
689 return ERR_PTR(-ENOMEM);
698 sco->setting = setting;
700 if (acl->state == BT_CONNECTED &&
701 (sco->state == BT_OPEN || sco->state == BT_CLOSED)) {
702 set_bit(HCI_CONN_POWER_SAVE, &acl->flags);
703 hci_conn_enter_active_mode(acl, BT_POWER_FORCE_ACTIVE_ON);
705 if (test_bit(HCI_CONN_MODE_CHANGE_PEND, &acl->flags)) {
706 /* defer SCO setup until mode change completed */
707 set_bit(HCI_CONN_SCO_SETUP_PEND, &acl->flags);
711 hci_sco_setup(acl, 0x00);
717 /* Create SCO, ACL or LE connection. */
718 struct hci_conn *hci_connect(struct hci_dev *hdev, int type, bdaddr_t *dst,
719 __u8 dst_type, __u8 sec_level, __u8 auth_type)
721 BT_DBG("%s dst %pMR type 0x%x", hdev->name, dst, type);
725 return hci_connect_le(hdev, dst, dst_type, sec_level, auth_type);
727 return hci_connect_acl(hdev, dst, sec_level, auth_type);
730 return ERR_PTR(-EINVAL);
733 /* Check link security requirement */
734 int hci_conn_check_link_mode(struct hci_conn *conn)
736 BT_DBG("hcon %p", conn);
738 if (hci_conn_ssp_enabled(conn) && !(conn->link_mode & HCI_LM_ENCRYPT))
744 /* Authenticate remote device */
745 static int hci_conn_auth(struct hci_conn *conn, __u8 sec_level, __u8 auth_type)
747 BT_DBG("hcon %p", conn);
749 if (conn->pending_sec_level > sec_level)
750 sec_level = conn->pending_sec_level;
752 if (sec_level > conn->sec_level)
753 conn->pending_sec_level = sec_level;
754 else if (conn->link_mode & HCI_LM_AUTH)
757 /* Make sure we preserve an existing MITM requirement*/
758 auth_type |= (conn->auth_type & 0x01);
760 conn->auth_type = auth_type;
762 if (!test_and_set_bit(HCI_CONN_AUTH_PEND, &conn->flags)) {
763 struct hci_cp_auth_requested cp;
765 /* encrypt must be pending if auth is also pending */
766 set_bit(HCI_CONN_ENCRYPT_PEND, &conn->flags);
768 cp.handle = cpu_to_le16(conn->handle);
769 hci_send_cmd(conn->hdev, HCI_OP_AUTH_REQUESTED,
771 if (conn->key_type != 0xff)
772 set_bit(HCI_CONN_REAUTH_PEND, &conn->flags);
778 /* Encrypt the the link */
779 static void hci_conn_encrypt(struct hci_conn *conn)
781 BT_DBG("hcon %p", conn);
783 if (!test_and_set_bit(HCI_CONN_ENCRYPT_PEND, &conn->flags)) {
784 struct hci_cp_set_conn_encrypt cp;
785 cp.handle = cpu_to_le16(conn->handle);
787 hci_send_cmd(conn->hdev, HCI_OP_SET_CONN_ENCRYPT, sizeof(cp),
792 /* Enable security */
793 int hci_conn_security(struct hci_conn *conn, __u8 sec_level, __u8 auth_type)
795 BT_DBG("hcon %p", conn);
797 if (conn->type == LE_LINK)
798 return smp_conn_security(conn, sec_level);
800 /* For sdp we don't need the link key. */
801 if (sec_level == BT_SECURITY_SDP)
804 /* For non 2.1 devices and low security level we don't need the link
806 if (sec_level == BT_SECURITY_LOW && !hci_conn_ssp_enabled(conn))
809 /* For other security levels we need the link key. */
810 if (!(conn->link_mode & HCI_LM_AUTH))
813 /* An authenticated FIPS approved combination key has sufficient
814 * security for security level 4. */
815 if (conn->key_type == HCI_LK_AUTH_COMBINATION_P256 &&
816 sec_level == BT_SECURITY_FIPS)
819 /* An authenticated combination key has sufficient security for
821 if ((conn->key_type == HCI_LK_AUTH_COMBINATION_P192 ||
822 conn->key_type == HCI_LK_AUTH_COMBINATION_P256) &&
823 sec_level == BT_SECURITY_HIGH)
826 /* An unauthenticated combination key has sufficient security for
827 security level 1 and 2. */
828 if ((conn->key_type == HCI_LK_UNAUTH_COMBINATION_P192 ||
829 conn->key_type == HCI_LK_UNAUTH_COMBINATION_P256) &&
830 (sec_level == BT_SECURITY_MEDIUM || sec_level == BT_SECURITY_LOW))
833 /* A combination key has always sufficient security for the security
834 levels 1 or 2. High security level requires the combination key
835 is generated using maximum PIN code length (16).
836 For pre 2.1 units. */
837 if (conn->key_type == HCI_LK_COMBINATION &&
838 (sec_level == BT_SECURITY_MEDIUM || sec_level == BT_SECURITY_LOW ||
839 conn->pin_length == 16))
843 if (test_bit(HCI_CONN_ENCRYPT_PEND, &conn->flags))
846 if (!hci_conn_auth(conn, sec_level, auth_type))
850 if (conn->link_mode & HCI_LM_ENCRYPT)
853 hci_conn_encrypt(conn);
856 EXPORT_SYMBOL(hci_conn_security);
858 /* Check secure link requirement */
859 int hci_conn_check_secure(struct hci_conn *conn, __u8 sec_level)
861 BT_DBG("hcon %p", conn);
863 /* Accept if non-secure or higher security level is required */
864 if (sec_level != BT_SECURITY_HIGH && sec_level != BT_SECURITY_FIPS)
867 /* Accept if secure or higher security level is already present */
868 if (conn->sec_level == BT_SECURITY_HIGH ||
869 conn->sec_level == BT_SECURITY_FIPS)
872 /* Reject not secure link */
875 EXPORT_SYMBOL(hci_conn_check_secure);
877 /* Change link key */
878 int hci_conn_change_link_key(struct hci_conn *conn)
880 BT_DBG("hcon %p", conn);
882 if (!test_and_set_bit(HCI_CONN_AUTH_PEND, &conn->flags)) {
883 struct hci_cp_change_conn_link_key cp;
884 cp.handle = cpu_to_le16(conn->handle);
885 hci_send_cmd(conn->hdev, HCI_OP_CHANGE_CONN_LINK_KEY,
893 int hci_conn_switch_role(struct hci_conn *conn, __u8 role)
895 BT_DBG("hcon %p", conn);
897 if (!role && conn->link_mode & HCI_LM_MASTER)
900 if (!test_and_set_bit(HCI_CONN_RSWITCH_PEND, &conn->flags)) {
901 struct hci_cp_switch_role cp;
902 bacpy(&cp.bdaddr, &conn->dst);
904 hci_send_cmd(conn->hdev, HCI_OP_SWITCH_ROLE, sizeof(cp), &cp);
909 EXPORT_SYMBOL(hci_conn_switch_role);
911 /* Enter active mode */
912 void hci_conn_enter_active_mode(struct hci_conn *conn, __u8 force_active)
914 struct hci_dev *hdev = conn->hdev;
916 BT_DBG("hcon %p mode %d", conn, conn->mode);
918 if (test_bit(HCI_RAW, &hdev->flags))
921 if (conn->mode != HCI_CM_SNIFF)
924 if (!test_bit(HCI_CONN_POWER_SAVE, &conn->flags) && !force_active)
927 if (!test_and_set_bit(HCI_CONN_MODE_CHANGE_PEND, &conn->flags)) {
928 struct hci_cp_exit_sniff_mode cp;
929 cp.handle = cpu_to_le16(conn->handle);
930 hci_send_cmd(hdev, HCI_OP_EXIT_SNIFF_MODE, sizeof(cp), &cp);
934 if (hdev->idle_timeout > 0)
935 queue_delayed_work(hdev->workqueue, &conn->idle_work,
936 msecs_to_jiffies(hdev->idle_timeout));
939 /* Drop all connection on the device */
940 void hci_conn_hash_flush(struct hci_dev *hdev)
942 struct hci_conn_hash *h = &hdev->conn_hash;
943 struct hci_conn *c, *n;
945 BT_DBG("hdev %s", hdev->name);
947 list_for_each_entry_safe(c, n, &h->list, list) {
948 c->state = BT_CLOSED;
950 hci_proto_disconn_cfm(c, HCI_ERROR_LOCAL_HOST_TERM);
955 /* Check pending connect attempts */
956 void hci_conn_check_pending(struct hci_dev *hdev)
958 struct hci_conn *conn;
960 BT_DBG("hdev %s", hdev->name);
964 conn = hci_conn_hash_lookup_state(hdev, ACL_LINK, BT_CONNECT2);
966 hci_acl_create_connection(conn);
968 hci_dev_unlock(hdev);
971 int hci_get_conn_list(void __user *arg)
974 struct hci_conn_list_req req, *cl;
975 struct hci_conn_info *ci;
976 struct hci_dev *hdev;
977 int n = 0, size, err;
979 if (copy_from_user(&req, arg, sizeof(req)))
982 if (!req.conn_num || req.conn_num > (PAGE_SIZE * 2) / sizeof(*ci))
985 size = sizeof(req) + req.conn_num * sizeof(*ci);
987 cl = kmalloc(size, GFP_KERNEL);
991 hdev = hci_dev_get(req.dev_id);
1000 list_for_each_entry(c, &hdev->conn_hash.list, list) {
1001 bacpy(&(ci + n)->bdaddr, &c->dst);
1002 (ci + n)->handle = c->handle;
1003 (ci + n)->type = c->type;
1004 (ci + n)->out = c->out;
1005 (ci + n)->state = c->state;
1006 (ci + n)->link_mode = c->link_mode;
1007 if (++n >= req.conn_num)
1010 hci_dev_unlock(hdev);
1012 cl->dev_id = hdev->id;
1014 size = sizeof(req) + n * sizeof(*ci);
1018 err = copy_to_user(arg, cl, size);
1021 return err ? -EFAULT : 0;
1024 int hci_get_conn_info(struct hci_dev *hdev, void __user *arg)
1026 struct hci_conn_info_req req;
1027 struct hci_conn_info ci;
1028 struct hci_conn *conn;
1029 char __user *ptr = arg + sizeof(req);
1031 if (copy_from_user(&req, arg, sizeof(req)))
1035 conn = hci_conn_hash_lookup_ba(hdev, req.type, &req.bdaddr);
1037 bacpy(&ci.bdaddr, &conn->dst);
1038 ci.handle = conn->handle;
1039 ci.type = conn->type;
1041 ci.state = conn->state;
1042 ci.link_mode = conn->link_mode;
1044 hci_dev_unlock(hdev);
1049 return copy_to_user(ptr, &ci, sizeof(ci)) ? -EFAULT : 0;
1052 int hci_get_auth_info(struct hci_dev *hdev, void __user *arg)
1054 struct hci_auth_info_req req;
1055 struct hci_conn *conn;
1057 if (copy_from_user(&req, arg, sizeof(req)))
1061 conn = hci_conn_hash_lookup_ba(hdev, ACL_LINK, &req.bdaddr);
1063 req.type = conn->auth_type;
1064 hci_dev_unlock(hdev);
1069 return copy_to_user(arg, &req, sizeof(req)) ? -EFAULT : 0;
1072 struct hci_chan *hci_chan_create(struct hci_conn *conn)
1074 struct hci_dev *hdev = conn->hdev;
1075 struct hci_chan *chan;
1077 BT_DBG("%s hcon %p", hdev->name, conn);
1079 chan = kzalloc(sizeof(struct hci_chan), GFP_KERNEL);
1084 skb_queue_head_init(&chan->data_q);
1085 chan->state = BT_CONNECTED;
1087 list_add_rcu(&chan->list, &conn->chan_list);
1092 void hci_chan_del(struct hci_chan *chan)
1094 struct hci_conn *conn = chan->conn;
1095 struct hci_dev *hdev = conn->hdev;
1097 BT_DBG("%s hcon %p chan %p", hdev->name, conn, chan);
1099 list_del_rcu(&chan->list);
1103 hci_conn_drop(conn);
1105 skb_queue_purge(&chan->data_q);
1109 void hci_chan_list_flush(struct hci_conn *conn)
1111 struct hci_chan *chan, *n;
1113 BT_DBG("hcon %p", conn);
1115 list_for_each_entry_safe(chan, n, &conn->chan_list, list)
1119 static struct hci_chan *__hci_chan_lookup_handle(struct hci_conn *hcon,
1122 struct hci_chan *hchan;
1124 list_for_each_entry(hchan, &hcon->chan_list, list) {
1125 if (hchan->handle == handle)
1132 struct hci_chan *hci_chan_lookup_handle(struct hci_dev *hdev, __u16 handle)
1134 struct hci_conn_hash *h = &hdev->conn_hash;
1135 struct hci_conn *hcon;
1136 struct hci_chan *hchan = NULL;
1140 list_for_each_entry_rcu(hcon, &h->list, list) {
1141 hchan = __hci_chan_lookup_handle(hcon, handle);