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>
33 #include <net/bluetooth/iso.h>
34 #include <net/bluetooth/mgmt.h>
36 #include "hci_request.h"
47 struct conn_handle_t {
48 struct hci_conn *conn;
52 static const struct sco_param esco_param_cvsd[] = {
53 { EDR_ESCO_MASK & ~ESCO_2EV3, 0x000a, 0x01 }, /* S3 */
54 { EDR_ESCO_MASK & ~ESCO_2EV3, 0x0007, 0x01 }, /* S2 */
55 { EDR_ESCO_MASK | ESCO_EV3, 0x0007, 0x01 }, /* S1 */
56 { EDR_ESCO_MASK | ESCO_HV3, 0xffff, 0x01 }, /* D1 */
57 { EDR_ESCO_MASK | ESCO_HV1, 0xffff, 0x01 }, /* D0 */
60 static const struct sco_param sco_param_cvsd[] = {
61 { EDR_ESCO_MASK | ESCO_HV3, 0xffff, 0xff }, /* D1 */
62 { EDR_ESCO_MASK | ESCO_HV1, 0xffff, 0xff }, /* D0 */
65 static const struct sco_param esco_param_msbc[] = {
66 { EDR_ESCO_MASK & ~ESCO_2EV3, 0x000d, 0x02 }, /* T2 */
67 { EDR_ESCO_MASK | ESCO_EV3, 0x0008, 0x02 }, /* T1 */
70 /* This function requires the caller holds hdev->lock */
71 static void hci_connect_le_scan_cleanup(struct hci_conn *conn)
73 struct hci_conn_params *params;
74 struct hci_dev *hdev = conn->hdev;
80 bdaddr_type = conn->dst_type;
82 /* Check if we need to convert to identity address */
83 irk = hci_get_irk(hdev, bdaddr, bdaddr_type);
85 bdaddr = &irk->bdaddr;
86 bdaddr_type = irk->addr_type;
89 params = hci_pend_le_action_lookup(&hdev->pend_le_conns, bdaddr,
91 if (!params || !params->explicit_connect)
94 /* The connection attempt was doing scan for new RPA, and is
95 * in scan phase. If params are not associated with any other
96 * autoconnect action, remove them completely. If they are, just unmark
97 * them as waiting for connection, by clearing explicit_connect field.
99 params->explicit_connect = false;
101 list_del_init(¶ms->action);
103 switch (params->auto_connect) {
104 case HCI_AUTO_CONN_EXPLICIT:
105 hci_conn_params_del(hdev, bdaddr, bdaddr_type);
106 /* return instead of break to avoid duplicate scan update */
108 case HCI_AUTO_CONN_DIRECT:
109 case HCI_AUTO_CONN_ALWAYS:
110 list_add(¶ms->action, &hdev->pend_le_conns);
112 case HCI_AUTO_CONN_REPORT:
113 list_add(¶ms->action, &hdev->pend_le_reports);
119 hci_update_passive_scan(hdev);
122 static void hci_conn_cleanup(struct hci_conn *conn)
124 struct hci_dev *hdev = conn->hdev;
126 if (test_bit(HCI_CONN_PARAM_REMOVAL_PEND, &conn->flags))
127 hci_conn_params_del(conn->hdev, &conn->dst, conn->dst_type);
129 if (test_and_clear_bit(HCI_CONN_FLUSH_KEY, &conn->flags))
130 hci_remove_link_key(hdev, &conn->dst);
132 hci_chan_list_flush(conn);
134 hci_conn_hash_del(hdev, conn);
139 if (conn->type == SCO_LINK || conn->type == ESCO_LINK) {
140 switch (conn->setting & SCO_AIRMODE_MASK) {
141 case SCO_AIRMODE_CVSD:
142 case SCO_AIRMODE_TRANSP:
144 hdev->notify(hdev, HCI_NOTIFY_DISABLE_SCO);
149 hdev->notify(hdev, HCI_NOTIFY_CONN_DEL);
152 hci_conn_del_sysfs(conn);
154 debugfs_remove_recursive(conn->debugfs);
161 static void le_scan_cleanup(struct work_struct *work)
163 struct hci_conn *conn = container_of(work, struct hci_conn,
165 struct hci_dev *hdev = conn->hdev;
166 struct hci_conn *c = NULL;
168 BT_DBG("%s hcon %p", hdev->name, conn);
172 /* Check that the hci_conn is still around */
174 list_for_each_entry_rcu(c, &hdev->conn_hash.list, list) {
181 hci_connect_le_scan_cleanup(conn);
182 hci_conn_cleanup(conn);
185 hci_dev_unlock(hdev);
190 static void hci_connect_le_scan_remove(struct hci_conn *conn)
192 BT_DBG("%s hcon %p", conn->hdev->name, conn);
194 /* We can't call hci_conn_del/hci_conn_cleanup here since that
195 * could deadlock with another hci_conn_del() call that's holding
196 * hci_dev_lock and doing cancel_delayed_work_sync(&conn->disc_work).
197 * Instead, grab temporary extra references to the hci_dev and
198 * hci_conn and perform the necessary cleanup in a separate work
202 hci_dev_hold(conn->hdev);
205 /* Even though we hold a reference to the hdev, many other
206 * things might get cleaned up meanwhile, including the hdev's
207 * own workqueue, so we can't use that for scheduling.
209 schedule_work(&conn->le_scan_cleanup);
212 static void hci_acl_create_connection(struct hci_conn *conn)
214 struct hci_dev *hdev = conn->hdev;
215 struct inquiry_entry *ie;
216 struct hci_cp_create_conn cp;
218 BT_DBG("hcon %p", conn);
220 /* Many controllers disallow HCI Create Connection while it is doing
221 * HCI Inquiry. So we cancel the Inquiry first before issuing HCI Create
222 * Connection. This may cause the MGMT discovering state to become false
223 * without user space's request but it is okay since the MGMT Discovery
224 * APIs do not promise that discovery should be done forever. Instead,
225 * the user space monitors the status of MGMT discovering and it may
226 * request for discovery again when this flag becomes false.
228 if (test_bit(HCI_INQUIRY, &hdev->flags)) {
229 /* Put this connection to "pending" state so that it will be
230 * executed after the inquiry cancel command complete event.
232 conn->state = BT_CONNECT2;
233 hci_send_cmd(hdev, HCI_OP_INQUIRY_CANCEL, 0, NULL);
237 conn->state = BT_CONNECT;
239 conn->role = HCI_ROLE_MASTER;
243 conn->link_policy = hdev->link_policy;
245 memset(&cp, 0, sizeof(cp));
246 bacpy(&cp.bdaddr, &conn->dst);
247 cp.pscan_rep_mode = 0x02;
249 ie = hci_inquiry_cache_lookup(hdev, &conn->dst);
251 if (inquiry_entry_age(ie) <= INQUIRY_ENTRY_AGE_MAX) {
252 cp.pscan_rep_mode = ie->data.pscan_rep_mode;
253 cp.pscan_mode = ie->data.pscan_mode;
254 cp.clock_offset = ie->data.clock_offset |
258 memcpy(conn->dev_class, ie->data.dev_class, 3);
261 cp.pkt_type = cpu_to_le16(conn->pkt_type);
262 if (lmp_rswitch_capable(hdev) && !(hdev->link_mode & HCI_LM_MASTER))
263 cp.role_switch = 0x01;
265 cp.role_switch = 0x00;
267 hci_send_cmd(hdev, HCI_OP_CREATE_CONN, sizeof(cp), &cp);
270 int hci_disconnect(struct hci_conn *conn, __u8 reason)
272 BT_DBG("hcon %p", conn);
274 /* When we are central of an established connection and it enters
275 * the disconnect timeout, then go ahead and try to read the
276 * current clock offset. Processing of the result is done
277 * within the event handling and hci_clock_offset_evt function.
279 if (conn->type == ACL_LINK && conn->role == HCI_ROLE_MASTER &&
280 (conn->state == BT_CONNECTED || conn->state == BT_CONFIG)) {
281 struct hci_dev *hdev = conn->hdev;
282 struct hci_cp_read_clock_offset clkoff_cp;
284 clkoff_cp.handle = cpu_to_le16(conn->handle);
285 hci_send_cmd(hdev, HCI_OP_READ_CLOCK_OFFSET, sizeof(clkoff_cp),
289 return hci_abort_conn(conn, reason);
292 static void hci_add_sco(struct hci_conn *conn, __u16 handle)
294 struct hci_dev *hdev = conn->hdev;
295 struct hci_cp_add_sco cp;
297 BT_DBG("hcon %p", conn);
299 conn->state = BT_CONNECT;
304 cp.handle = cpu_to_le16(handle);
305 cp.pkt_type = cpu_to_le16(conn->pkt_type);
307 hci_send_cmd(hdev, HCI_OP_ADD_SCO, sizeof(cp), &cp);
310 static bool find_next_esco_param(struct hci_conn *conn,
311 const struct sco_param *esco_param, int size)
313 for (; conn->attempt <= size; conn->attempt++) {
314 if (lmp_esco_2m_capable(conn->link) ||
315 (esco_param[conn->attempt - 1].pkt_type & ESCO_2EV3))
317 BT_DBG("hcon %p skipped attempt %d, eSCO 2M not supported",
318 conn, conn->attempt);
321 return conn->attempt <= size;
324 static int configure_datapath_sync(struct hci_dev *hdev, struct bt_codec *codec)
327 __u8 vnd_len, *vnd_data = NULL;
328 struct hci_op_configure_data_path *cmd = NULL;
330 err = hdev->get_codec_config_data(hdev, ESCO_LINK, codec, &vnd_len,
335 cmd = kzalloc(sizeof(*cmd) + vnd_len, GFP_KERNEL);
341 err = hdev->get_data_path_id(hdev, &cmd->data_path_id);
345 cmd->vnd_len = vnd_len;
346 memcpy(cmd->vnd_data, vnd_data, vnd_len);
348 cmd->direction = 0x00;
349 __hci_cmd_sync_status(hdev, HCI_CONFIGURE_DATA_PATH,
350 sizeof(*cmd) + vnd_len, cmd, HCI_CMD_TIMEOUT);
352 cmd->direction = 0x01;
353 err = __hci_cmd_sync_status(hdev, HCI_CONFIGURE_DATA_PATH,
354 sizeof(*cmd) + vnd_len, cmd,
363 static int hci_enhanced_setup_sync(struct hci_dev *hdev, void *data)
365 struct conn_handle_t *conn_handle = data;
366 struct hci_conn *conn = conn_handle->conn;
367 __u16 handle = conn_handle->handle;
368 struct hci_cp_enhanced_setup_sync_conn cp;
369 const struct sco_param *param;
373 bt_dev_dbg(hdev, "hcon %p", conn);
375 /* for offload use case, codec needs to configured before opening SCO */
376 if (conn->codec.data_path)
377 configure_datapath_sync(hdev, &conn->codec);
379 conn->state = BT_CONNECT;
384 memset(&cp, 0x00, sizeof(cp));
386 cp.handle = cpu_to_le16(handle);
388 cp.tx_bandwidth = cpu_to_le32(0x00001f40);
389 cp.rx_bandwidth = cpu_to_le32(0x00001f40);
391 switch (conn->codec.id) {
393 if (!find_next_esco_param(conn, esco_param_msbc,
394 ARRAY_SIZE(esco_param_msbc)))
397 param = &esco_param_msbc[conn->attempt - 1];
398 cp.tx_coding_format.id = 0x05;
399 cp.rx_coding_format.id = 0x05;
400 cp.tx_codec_frame_size = __cpu_to_le16(60);
401 cp.rx_codec_frame_size = __cpu_to_le16(60);
402 cp.in_bandwidth = __cpu_to_le32(32000);
403 cp.out_bandwidth = __cpu_to_le32(32000);
404 cp.in_coding_format.id = 0x04;
405 cp.out_coding_format.id = 0x04;
406 cp.in_coded_data_size = __cpu_to_le16(16);
407 cp.out_coded_data_size = __cpu_to_le16(16);
408 cp.in_pcm_data_format = 2;
409 cp.out_pcm_data_format = 2;
410 cp.in_pcm_sample_payload_msb_pos = 0;
411 cp.out_pcm_sample_payload_msb_pos = 0;
412 cp.in_data_path = conn->codec.data_path;
413 cp.out_data_path = conn->codec.data_path;
414 cp.in_transport_unit_size = 1;
415 cp.out_transport_unit_size = 1;
418 case BT_CODEC_TRANSPARENT:
419 if (!find_next_esco_param(conn, esco_param_msbc,
420 ARRAY_SIZE(esco_param_msbc)))
422 param = &esco_param_msbc[conn->attempt - 1];
423 cp.tx_coding_format.id = 0x03;
424 cp.rx_coding_format.id = 0x03;
425 cp.tx_codec_frame_size = __cpu_to_le16(60);
426 cp.rx_codec_frame_size = __cpu_to_le16(60);
427 cp.in_bandwidth = __cpu_to_le32(0x1f40);
428 cp.out_bandwidth = __cpu_to_le32(0x1f40);
429 cp.in_coding_format.id = 0x03;
430 cp.out_coding_format.id = 0x03;
431 cp.in_coded_data_size = __cpu_to_le16(16);
432 cp.out_coded_data_size = __cpu_to_le16(16);
433 cp.in_pcm_data_format = 2;
434 cp.out_pcm_data_format = 2;
435 cp.in_pcm_sample_payload_msb_pos = 0;
436 cp.out_pcm_sample_payload_msb_pos = 0;
437 cp.in_data_path = conn->codec.data_path;
438 cp.out_data_path = conn->codec.data_path;
439 cp.in_transport_unit_size = 1;
440 cp.out_transport_unit_size = 1;
444 if (lmp_esco_capable(conn->link)) {
445 if (!find_next_esco_param(conn, esco_param_cvsd,
446 ARRAY_SIZE(esco_param_cvsd)))
448 param = &esco_param_cvsd[conn->attempt - 1];
450 if (conn->attempt > ARRAY_SIZE(sco_param_cvsd))
452 param = &sco_param_cvsd[conn->attempt - 1];
454 cp.tx_coding_format.id = 2;
455 cp.rx_coding_format.id = 2;
456 cp.tx_codec_frame_size = __cpu_to_le16(60);
457 cp.rx_codec_frame_size = __cpu_to_le16(60);
458 cp.in_bandwidth = __cpu_to_le32(16000);
459 cp.out_bandwidth = __cpu_to_le32(16000);
460 cp.in_coding_format.id = 4;
461 cp.out_coding_format.id = 4;
462 cp.in_coded_data_size = __cpu_to_le16(16);
463 cp.out_coded_data_size = __cpu_to_le16(16);
464 cp.in_pcm_data_format = 2;
465 cp.out_pcm_data_format = 2;
466 cp.in_pcm_sample_payload_msb_pos = 0;
467 cp.out_pcm_sample_payload_msb_pos = 0;
468 cp.in_data_path = conn->codec.data_path;
469 cp.out_data_path = conn->codec.data_path;
470 cp.in_transport_unit_size = 16;
471 cp.out_transport_unit_size = 16;
477 cp.retrans_effort = param->retrans_effort;
478 cp.pkt_type = __cpu_to_le16(param->pkt_type);
479 cp.max_latency = __cpu_to_le16(param->max_latency);
481 if (hci_send_cmd(hdev, HCI_OP_ENHANCED_SETUP_SYNC_CONN, sizeof(cp), &cp) < 0)
487 static bool hci_setup_sync_conn(struct hci_conn *conn, __u16 handle)
489 struct hci_dev *hdev = conn->hdev;
490 struct hci_cp_setup_sync_conn cp;
491 const struct sco_param *param;
493 bt_dev_dbg(hdev, "hcon %p", conn);
495 conn->state = BT_CONNECT;
500 cp.handle = cpu_to_le16(handle);
502 cp.tx_bandwidth = cpu_to_le32(0x00001f40);
503 cp.rx_bandwidth = cpu_to_le32(0x00001f40);
504 cp.voice_setting = cpu_to_le16(conn->setting);
506 switch (conn->setting & SCO_AIRMODE_MASK) {
507 case SCO_AIRMODE_TRANSP:
508 if (!find_next_esco_param(conn, esco_param_msbc,
509 ARRAY_SIZE(esco_param_msbc)))
511 param = &esco_param_msbc[conn->attempt - 1];
513 case SCO_AIRMODE_CVSD:
514 if (lmp_esco_capable(conn->link)) {
515 if (!find_next_esco_param(conn, esco_param_cvsd,
516 ARRAY_SIZE(esco_param_cvsd)))
518 param = &esco_param_cvsd[conn->attempt - 1];
520 if (conn->attempt > ARRAY_SIZE(sco_param_cvsd))
522 param = &sco_param_cvsd[conn->attempt - 1];
529 cp.retrans_effort = param->retrans_effort;
530 cp.pkt_type = __cpu_to_le16(param->pkt_type);
531 cp.max_latency = __cpu_to_le16(param->max_latency);
533 if (hci_send_cmd(hdev, HCI_OP_SETUP_SYNC_CONN, sizeof(cp), &cp) < 0)
539 bool hci_setup_sync(struct hci_conn *conn, __u16 handle)
542 struct conn_handle_t *conn_handle;
544 if (enhanced_sync_conn_capable(conn->hdev)) {
545 conn_handle = kzalloc(sizeof(*conn_handle), GFP_KERNEL);
550 conn_handle->conn = conn;
551 conn_handle->handle = handle;
552 result = hci_cmd_sync_queue(conn->hdev, hci_enhanced_setup_sync,
560 return hci_setup_sync_conn(conn, handle);
563 u8 hci_le_conn_update(struct hci_conn *conn, u16 min, u16 max, u16 latency,
566 struct hci_dev *hdev = conn->hdev;
567 struct hci_conn_params *params;
568 struct hci_cp_le_conn_update cp;
572 params = hci_conn_params_lookup(hdev, &conn->dst, conn->dst_type);
574 params->conn_min_interval = min;
575 params->conn_max_interval = max;
576 params->conn_latency = latency;
577 params->supervision_timeout = to_multiplier;
580 hci_dev_unlock(hdev);
582 memset(&cp, 0, sizeof(cp));
583 cp.handle = cpu_to_le16(conn->handle);
584 cp.conn_interval_min = cpu_to_le16(min);
585 cp.conn_interval_max = cpu_to_le16(max);
586 cp.conn_latency = cpu_to_le16(latency);
587 cp.supervision_timeout = cpu_to_le16(to_multiplier);
588 cp.min_ce_len = cpu_to_le16(0x0000);
589 cp.max_ce_len = cpu_to_le16(0x0000);
591 hci_send_cmd(hdev, HCI_OP_LE_CONN_UPDATE, sizeof(cp), &cp);
599 void hci_le_start_enc(struct hci_conn *conn, __le16 ediv, __le64 rand,
600 __u8 ltk[16], __u8 key_size)
602 struct hci_dev *hdev = conn->hdev;
603 struct hci_cp_le_start_enc cp;
605 BT_DBG("hcon %p", conn);
607 memset(&cp, 0, sizeof(cp));
609 cp.handle = cpu_to_le16(conn->handle);
612 memcpy(cp.ltk, ltk, key_size);
614 hci_send_cmd(hdev, HCI_OP_LE_START_ENC, sizeof(cp), &cp);
617 /* Device _must_ be locked */
618 void hci_sco_setup(struct hci_conn *conn, __u8 status)
620 struct hci_conn *sco = conn->link;
625 BT_DBG("hcon %p", conn);
628 if (lmp_esco_capable(conn->hdev))
629 hci_setup_sync(sco, conn->handle);
631 hci_add_sco(sco, conn->handle);
633 hci_connect_cfm(sco, status);
638 static void hci_conn_timeout(struct work_struct *work)
640 struct hci_conn *conn = container_of(work, struct hci_conn,
642 int refcnt = atomic_read(&conn->refcnt);
644 BT_DBG("hcon %p state %s", conn, state_to_string(conn->state));
648 /* FIXME: It was observed that in pairing failed scenario, refcnt
649 * drops below 0. Probably this is because l2cap_conn_del calls
650 * l2cap_chan_del for each channel, and inside l2cap_chan_del conn is
651 * dropped. After that loop hci_chan_del is called which also drops
652 * conn. For now make sure that ACL is alive if refcnt is higher then 0,
658 /* LE connections in scanning state need special handling */
659 if (conn->state == BT_CONNECT && conn->type == LE_LINK &&
660 test_bit(HCI_CONN_SCANNING, &conn->flags)) {
661 hci_connect_le_scan_remove(conn);
665 hci_abort_conn(conn, hci_proto_disconn_ind(conn));
668 /* Enter sniff mode */
669 static void hci_conn_idle(struct work_struct *work)
671 struct hci_conn *conn = container_of(work, struct hci_conn,
673 struct hci_dev *hdev = conn->hdev;
675 BT_DBG("hcon %p mode %d", conn, conn->mode);
677 if (!lmp_sniff_capable(hdev) || !lmp_sniff_capable(conn))
680 if (conn->mode != HCI_CM_ACTIVE || !(conn->link_policy & HCI_LP_SNIFF))
683 if (lmp_sniffsubr_capable(hdev) && lmp_sniffsubr_capable(conn)) {
684 struct hci_cp_sniff_subrate cp;
685 cp.handle = cpu_to_le16(conn->handle);
686 cp.max_latency = cpu_to_le16(0);
687 cp.min_remote_timeout = cpu_to_le16(0);
688 cp.min_local_timeout = cpu_to_le16(0);
689 hci_send_cmd(hdev, HCI_OP_SNIFF_SUBRATE, sizeof(cp), &cp);
692 if (!test_and_set_bit(HCI_CONN_MODE_CHANGE_PEND, &conn->flags)) {
693 struct hci_cp_sniff_mode cp;
694 cp.handle = cpu_to_le16(conn->handle);
695 cp.max_interval = cpu_to_le16(hdev->sniff_max_interval);
696 cp.min_interval = cpu_to_le16(hdev->sniff_min_interval);
697 cp.attempt = cpu_to_le16(4);
698 cp.timeout = cpu_to_le16(1);
699 hci_send_cmd(hdev, HCI_OP_SNIFF_MODE, sizeof(cp), &cp);
703 static void hci_conn_auto_accept(struct work_struct *work)
705 struct hci_conn *conn = container_of(work, struct hci_conn,
706 auto_accept_work.work);
708 hci_send_cmd(conn->hdev, HCI_OP_USER_CONFIRM_REPLY, sizeof(conn->dst),
712 static void le_disable_advertising(struct hci_dev *hdev)
714 if (ext_adv_capable(hdev)) {
715 struct hci_cp_le_set_ext_adv_enable cp;
718 cp.num_of_sets = 0x00;
720 hci_send_cmd(hdev, HCI_OP_LE_SET_EXT_ADV_ENABLE, sizeof(cp),
724 hci_send_cmd(hdev, HCI_OP_LE_SET_ADV_ENABLE, sizeof(enable),
729 static void le_conn_timeout(struct work_struct *work)
731 struct hci_conn *conn = container_of(work, struct hci_conn,
732 le_conn_timeout.work);
733 struct hci_dev *hdev = conn->hdev;
737 /* We could end up here due to having done directed advertising,
738 * so clean up the state if necessary. This should however only
739 * happen with broken hardware or if low duty cycle was used
740 * (which doesn't have a timeout of its own).
742 if (conn->role == HCI_ROLE_SLAVE) {
743 /* Disable LE Advertising */
744 le_disable_advertising(hdev);
746 hci_conn_failed(conn, HCI_ERROR_ADVERTISING_TIMEOUT);
747 hci_dev_unlock(hdev);
751 hci_abort_conn(conn, HCI_ERROR_REMOTE_USER_TERM);
754 struct iso_list_data {
766 struct hci_cp_le_set_cig_params cp;
767 struct hci_cis_params cis[0x11];
771 static void bis_list(struct hci_conn *conn, void *data)
773 struct iso_list_data *d = data;
775 /* Skip if not broadcast/ANY address */
776 if (bacmp(&conn->dst, BDADDR_ANY))
779 if (d->big != conn->iso_qos.big || d->bis == BT_ISO_QOS_BIS_UNSET ||
780 d->bis != conn->iso_qos.bis)
786 static void find_bis(struct hci_conn *conn, void *data)
788 struct iso_list_data *d = data;
791 if (bacmp(&conn->dst, BDADDR_ANY))
797 static int terminate_big_sync(struct hci_dev *hdev, void *data)
799 struct iso_list_data *d = data;
801 bt_dev_dbg(hdev, "big 0x%2.2x bis 0x%2.2x", d->big, d->bis);
803 hci_remove_ext_adv_instance_sync(hdev, d->bis, NULL);
805 /* Check if ISO connection is a BIS and terminate BIG if there are
806 * no other connections using it.
808 hci_conn_hash_list_state(hdev, find_bis, ISO_LINK, BT_CONNECTED, d);
812 return hci_le_terminate_big_sync(hdev, d->big,
813 HCI_ERROR_LOCAL_HOST_TERM);
816 static void terminate_big_destroy(struct hci_dev *hdev, void *data, int err)
821 static int hci_le_terminate_big(struct hci_dev *hdev, u8 big, u8 bis)
823 struct iso_list_data *d;
826 bt_dev_dbg(hdev, "big 0x%2.2x bis 0x%2.2x", big, bis);
828 d = kmalloc(sizeof(*d), GFP_KERNEL);
832 memset(d, 0, sizeof(*d));
836 ret = hci_cmd_sync_queue(hdev, terminate_big_sync, d,
837 terminate_big_destroy);
844 static int big_terminate_sync(struct hci_dev *hdev, void *data)
846 struct iso_list_data *d = data;
848 bt_dev_dbg(hdev, "big 0x%2.2x sync_handle 0x%4.4x", d->big,
851 /* Check if ISO connection is a BIS and terminate BIG if there are
852 * no other connections using it.
854 hci_conn_hash_list_state(hdev, find_bis, ISO_LINK, BT_CONNECTED, d);
858 hci_le_big_terminate_sync(hdev, d->big);
860 return hci_le_pa_terminate_sync(hdev, d->sync_handle);
863 static int hci_le_big_terminate(struct hci_dev *hdev, u8 big, u16 sync_handle)
865 struct iso_list_data *d;
868 bt_dev_dbg(hdev, "big 0x%2.2x sync_handle 0x%4.4x", big, sync_handle);
870 d = kmalloc(sizeof(*d), GFP_KERNEL);
874 memset(d, 0, sizeof(*d));
876 d->sync_handle = sync_handle;
878 ret = hci_cmd_sync_queue(hdev, big_terminate_sync, d,
879 terminate_big_destroy);
886 /* Cleanup BIS connection
888 * Detects if there any BIS left connected in a BIG
889 * broadcaster: Remove advertising instance and terminate BIG.
890 * broadcaster receiver: Teminate BIG sync and terminate PA sync.
892 static void bis_cleanup(struct hci_conn *conn)
894 struct hci_dev *hdev = conn->hdev;
896 bt_dev_dbg(hdev, "conn %p", conn);
898 if (conn->role == HCI_ROLE_MASTER) {
899 if (!test_and_clear_bit(HCI_CONN_PER_ADV, &conn->flags))
902 hci_le_terminate_big(hdev, conn->iso_qos.big,
905 hci_le_big_terminate(hdev, conn->iso_qos.big,
910 static int remove_cig_sync(struct hci_dev *hdev, void *data)
912 u8 handle = PTR_ERR(data);
914 return hci_le_remove_cig_sync(hdev, handle);
917 static int hci_le_remove_cig(struct hci_dev *hdev, u8 handle)
919 bt_dev_dbg(hdev, "handle 0x%2.2x", handle);
921 return hci_cmd_sync_queue(hdev, remove_cig_sync, ERR_PTR(handle), NULL);
924 static void find_cis(struct hci_conn *conn, void *data)
926 struct iso_list_data *d = data;
928 /* Ignore broadcast */
929 if (!bacmp(&conn->dst, BDADDR_ANY))
935 /* Cleanup CIS connection:
937 * Detects if there any CIS left connected in a CIG and remove it.
939 static void cis_cleanup(struct hci_conn *conn)
941 struct hci_dev *hdev = conn->hdev;
942 struct iso_list_data d;
944 memset(&d, 0, sizeof(d));
945 d.cig = conn->iso_qos.cig;
947 /* Check if ISO connection is a CIS and remove CIG if there are
948 * no other connections using it.
950 hci_conn_hash_list_state(hdev, find_cis, ISO_LINK, BT_CONNECTED, &d);
954 hci_le_remove_cig(hdev, conn->iso_qos.cig);
957 struct hci_conn *hci_conn_add(struct hci_dev *hdev, int type, bdaddr_t *dst,
960 struct hci_conn *conn;
962 BT_DBG("%s dst %pMR", hdev->name, dst);
964 conn = kzalloc(sizeof(*conn), GFP_KERNEL);
968 bacpy(&conn->dst, dst);
969 bacpy(&conn->src, &hdev->bdaddr);
970 conn->handle = HCI_CONN_HANDLE_UNSET;
974 conn->mode = HCI_CM_ACTIVE;
975 conn->state = BT_OPEN;
976 conn->auth_type = HCI_AT_GENERAL_BONDING;
977 conn->io_capability = hdev->io_capability;
978 conn->remote_auth = 0xff;
979 conn->key_type = 0xff;
980 conn->rssi = HCI_RSSI_INVALID;
981 conn->tx_power = HCI_TX_POWER_INVALID;
982 conn->max_tx_power = HCI_TX_POWER_INVALID;
984 set_bit(HCI_CONN_POWER_SAVE, &conn->flags);
985 conn->disc_timeout = HCI_DISCONN_TIMEOUT;
987 /* Set Default Authenticated payload timeout to 30s */
988 conn->auth_payload_timeout = DEFAULT_AUTH_PAYLOAD_TIMEOUT;
990 if (conn->role == HCI_ROLE_MASTER)
995 conn->pkt_type = hdev->pkt_type & ACL_PTYPE_MASK;
998 /* conn->src should reflect the local identity address */
999 hci_copy_identity_address(hdev, &conn->src, &conn->src_type);
1002 /* conn->src should reflect the local identity address */
1003 hci_copy_identity_address(hdev, &conn->src, &conn->src_type);
1005 /* set proper cleanup function */
1006 if (!bacmp(dst, BDADDR_ANY))
1007 conn->cleanup = bis_cleanup;
1008 else if (conn->role == HCI_ROLE_MASTER)
1009 conn->cleanup = cis_cleanup;
1013 if (lmp_esco_capable(hdev))
1014 conn->pkt_type = (hdev->esco_type & SCO_ESCO_MASK) |
1015 (hdev->esco_type & EDR_ESCO_MASK);
1017 conn->pkt_type = hdev->pkt_type & SCO_PTYPE_MASK;
1020 conn->pkt_type = hdev->esco_type & ~EDR_ESCO_MASK;
1024 skb_queue_head_init(&conn->data_q);
1026 INIT_LIST_HEAD(&conn->chan_list);
1028 INIT_DELAYED_WORK(&conn->disc_work, hci_conn_timeout);
1029 INIT_DELAYED_WORK(&conn->auto_accept_work, hci_conn_auto_accept);
1030 INIT_DELAYED_WORK(&conn->idle_work, hci_conn_idle);
1031 INIT_DELAYED_WORK(&conn->le_conn_timeout, le_conn_timeout);
1032 INIT_WORK(&conn->le_scan_cleanup, le_scan_cleanup);
1034 atomic_set(&conn->refcnt, 0);
1038 hci_conn_hash_add(hdev, conn);
1040 /* The SCO and eSCO connections will only be notified when their
1041 * setup has been completed. This is different to ACL links which
1042 * can be notified right away.
1044 if (conn->type != SCO_LINK && conn->type != ESCO_LINK) {
1046 hdev->notify(hdev, HCI_NOTIFY_CONN_ADD);
1049 hci_conn_init_sysfs(conn);
1054 int hci_conn_del(struct hci_conn *conn)
1056 struct hci_dev *hdev = conn->hdev;
1058 BT_DBG("%s hcon %p handle %d", hdev->name, conn, conn->handle);
1060 cancel_delayed_work_sync(&conn->disc_work);
1061 cancel_delayed_work_sync(&conn->auto_accept_work);
1062 cancel_delayed_work_sync(&conn->idle_work);
1064 if (conn->type == ACL_LINK) {
1065 struct hci_conn *sco = conn->link;
1069 /* Unacked frames */
1070 hdev->acl_cnt += conn->sent;
1071 } else if (conn->type == LE_LINK) {
1072 cancel_delayed_work(&conn->le_conn_timeout);
1075 hdev->le_cnt += conn->sent;
1077 hdev->acl_cnt += conn->sent;
1079 struct hci_conn *acl = conn->link;
1086 /* Unacked ISO frames */
1087 if (conn->type == ISO_LINK) {
1089 hdev->iso_cnt += conn->sent;
1090 else if (hdev->le_pkts)
1091 hdev->le_cnt += conn->sent;
1093 hdev->acl_cnt += conn->sent;
1098 amp_mgr_put(conn->amp_mgr);
1100 skb_queue_purge(&conn->data_q);
1102 /* Remove the connection from the list and cleanup its remaining
1103 * state. This is a separate function since for some cases like
1104 * BT_CONNECT_SCAN we *only* want the cleanup part without the
1105 * rest of hci_conn_del.
1107 hci_conn_cleanup(conn);
1112 struct hci_dev *hci_get_route(bdaddr_t *dst, bdaddr_t *src, uint8_t src_type)
1114 int use_src = bacmp(src, BDADDR_ANY);
1115 struct hci_dev *hdev = NULL, *d;
1117 BT_DBG("%pMR -> %pMR", src, dst);
1119 read_lock(&hci_dev_list_lock);
1121 list_for_each_entry(d, &hci_dev_list, list) {
1122 if (!test_bit(HCI_UP, &d->flags) ||
1123 hci_dev_test_flag(d, HCI_USER_CHANNEL) ||
1124 d->dev_type != HCI_PRIMARY)
1128 * No source address - find interface with bdaddr != dst
1129 * Source address - find interface with bdaddr == src
1136 if (src_type == BDADDR_BREDR) {
1137 if (!lmp_bredr_capable(d))
1139 bacpy(&id_addr, &d->bdaddr);
1140 id_addr_type = BDADDR_BREDR;
1142 if (!lmp_le_capable(d))
1145 hci_copy_identity_address(d, &id_addr,
1148 /* Convert from HCI to three-value type */
1149 if (id_addr_type == ADDR_LE_DEV_PUBLIC)
1150 id_addr_type = BDADDR_LE_PUBLIC;
1152 id_addr_type = BDADDR_LE_RANDOM;
1155 if (!bacmp(&id_addr, src) && id_addr_type == src_type) {
1159 if (bacmp(&d->bdaddr, dst)) {
1166 hdev = hci_dev_hold(hdev);
1168 read_unlock(&hci_dev_list_lock);
1171 EXPORT_SYMBOL(hci_get_route);
1173 /* This function requires the caller holds hdev->lock */
1174 static void hci_le_conn_failed(struct hci_conn *conn, u8 status)
1176 struct hci_dev *hdev = conn->hdev;
1177 struct hci_conn_params *params;
1179 params = hci_pend_le_action_lookup(&hdev->pend_le_conns, &conn->dst,
1181 if (params && params->conn) {
1182 hci_conn_drop(params->conn);
1183 hci_conn_put(params->conn);
1184 params->conn = NULL;
1187 /* If the status indicates successful cancellation of
1188 * the attempt (i.e. Unknown Connection Id) there's no point of
1189 * notifying failure since we'll go back to keep trying to
1190 * connect. The only exception is explicit connect requests
1191 * where a timeout + cancel does indicate an actual failure.
1193 if (status != HCI_ERROR_UNKNOWN_CONN_ID ||
1194 (params && params->explicit_connect))
1195 mgmt_connect_failed(hdev, &conn->dst, conn->type,
1196 conn->dst_type, status);
1198 /* Since we may have temporarily stopped the background scanning in
1199 * favor of connection establishment, we should restart it.
1201 hci_update_passive_scan(hdev);
1203 /* Enable advertising in case this was a failed connection
1204 * attempt as a peripheral.
1206 hci_enable_advertising(hdev);
1209 /* This function requires the caller holds hdev->lock */
1210 void hci_conn_failed(struct hci_conn *conn, u8 status)
1212 struct hci_dev *hdev = conn->hdev;
1214 bt_dev_dbg(hdev, "status 0x%2.2x", status);
1216 switch (conn->type) {
1218 hci_le_conn_failed(conn, status);
1221 mgmt_connect_failed(hdev, &conn->dst, conn->type,
1222 conn->dst_type, status);
1226 conn->state = BT_CLOSED;
1227 hci_connect_cfm(conn, status);
1231 static void create_le_conn_complete(struct hci_dev *hdev, void *data, int err)
1233 struct hci_conn *conn = data;
1238 hci_connect_le_scan_cleanup(conn);
1242 bt_dev_err(hdev, "request failed to create LE connection: err %d", err);
1244 /* Check if connection is still pending */
1245 if (conn != hci_lookup_le_connect(hdev))
1248 hci_conn_failed(conn, bt_status(err));
1251 hci_dev_unlock(hdev);
1254 static int hci_connect_le_sync(struct hci_dev *hdev, void *data)
1256 struct hci_conn *conn = data;
1258 bt_dev_dbg(hdev, "conn %p", conn);
1260 return hci_le_create_conn_sync(hdev, conn);
1263 struct hci_conn *hci_connect_le(struct hci_dev *hdev, bdaddr_t *dst,
1264 u8 dst_type, bool dst_resolved, u8 sec_level,
1265 u16 conn_timeout, u8 role)
1267 struct hci_conn *conn;
1268 struct smp_irk *irk;
1271 /* Let's make sure that le is enabled.*/
1272 if (!hci_dev_test_flag(hdev, HCI_LE_ENABLED)) {
1273 if (lmp_le_capable(hdev))
1274 return ERR_PTR(-ECONNREFUSED);
1276 return ERR_PTR(-EOPNOTSUPP);
1279 /* Since the controller supports only one LE connection attempt at a
1280 * time, we return -EBUSY if there is any connection attempt running.
1282 if (hci_lookup_le_connect(hdev))
1283 return ERR_PTR(-EBUSY);
1285 /* If there's already a connection object but it's not in
1286 * scanning state it means it must already be established, in
1287 * which case we can't do anything else except report a failure
1290 conn = hci_conn_hash_lookup_le(hdev, dst, dst_type);
1291 if (conn && !test_bit(HCI_CONN_SCANNING, &conn->flags)) {
1292 return ERR_PTR(-EBUSY);
1295 /* Check if the destination address has been resolved by the controller
1296 * since if it did then the identity address shall be used.
1298 if (!dst_resolved) {
1299 /* When given an identity address with existing identity
1300 * resolving key, the connection needs to be established
1301 * to a resolvable random address.
1303 * Storing the resolvable random address is required here
1304 * to handle connection failures. The address will later
1305 * be resolved back into the original identity address
1306 * from the connect request.
1308 irk = hci_find_irk_by_addr(hdev, dst, dst_type);
1309 if (irk && bacmp(&irk->rpa, BDADDR_ANY)) {
1311 dst_type = ADDR_LE_DEV_RANDOM;
1316 bacpy(&conn->dst, dst);
1318 conn = hci_conn_add(hdev, LE_LINK, dst, role);
1320 return ERR_PTR(-ENOMEM);
1321 hci_conn_hold(conn);
1322 conn->pending_sec_level = sec_level;
1325 conn->dst_type = dst_type;
1326 conn->sec_level = BT_SECURITY_LOW;
1327 conn->conn_timeout = conn_timeout;
1329 conn->state = BT_CONNECT;
1330 clear_bit(HCI_CONN_SCANNING, &conn->flags);
1332 err = hci_cmd_sync_queue(hdev, hci_connect_le_sync, conn,
1333 create_le_conn_complete);
1336 return ERR_PTR(err);
1342 static bool is_connected(struct hci_dev *hdev, bdaddr_t *addr, u8 type)
1344 struct hci_conn *conn;
1346 conn = hci_conn_hash_lookup_le(hdev, addr, type);
1350 if (conn->state != BT_CONNECTED)
1356 /* This function requires the caller holds hdev->lock */
1357 static int hci_explicit_conn_params_set(struct hci_dev *hdev,
1358 bdaddr_t *addr, u8 addr_type)
1360 struct hci_conn_params *params;
1362 if (is_connected(hdev, addr, addr_type))
1365 params = hci_conn_params_lookup(hdev, addr, addr_type);
1367 params = hci_conn_params_add(hdev, addr, addr_type);
1371 /* If we created new params, mark them to be deleted in
1372 * hci_connect_le_scan_cleanup. It's different case than
1373 * existing disabled params, those will stay after cleanup.
1375 params->auto_connect = HCI_AUTO_CONN_EXPLICIT;
1378 /* We're trying to connect, so make sure params are at pend_le_conns */
1379 if (params->auto_connect == HCI_AUTO_CONN_DISABLED ||
1380 params->auto_connect == HCI_AUTO_CONN_REPORT ||
1381 params->auto_connect == HCI_AUTO_CONN_EXPLICIT) {
1382 list_del_init(¶ms->action);
1383 list_add(¶ms->action, &hdev->pend_le_conns);
1386 params->explicit_connect = true;
1388 BT_DBG("addr %pMR (type %u) auto_connect %u", addr, addr_type,
1389 params->auto_connect);
1394 static int qos_set_big(struct hci_dev *hdev, struct bt_iso_qos *qos)
1396 struct iso_list_data data;
1398 /* Allocate a BIG if not set */
1399 if (qos->big == BT_ISO_QOS_BIG_UNSET) {
1400 for (data.big = 0x00; data.big < 0xef; data.big++) {
1404 hci_conn_hash_list_state(hdev, bis_list, ISO_LINK,
1410 if (data.big == 0xef)
1411 return -EADDRNOTAVAIL;
1414 qos->big = data.big;
1420 static int qos_set_bis(struct hci_dev *hdev, struct bt_iso_qos *qos)
1422 struct iso_list_data data;
1424 /* Allocate BIS if not set */
1425 if (qos->bis == BT_ISO_QOS_BIS_UNSET) {
1426 /* Find an unused adv set to advertise BIS, skip instance 0x00
1427 * since it is reserved as general purpose set.
1429 for (data.bis = 0x01; data.bis < hdev->le_num_of_adv_sets;
1433 hci_conn_hash_list_state(hdev, bis_list, ISO_LINK,
1439 if (data.bis == hdev->le_num_of_adv_sets)
1440 return -EADDRNOTAVAIL;
1443 qos->bis = data.bis;
1449 /* This function requires the caller holds hdev->lock */
1450 static struct hci_conn *hci_add_bis(struct hci_dev *hdev, bdaddr_t *dst,
1451 struct bt_iso_qos *qos)
1453 struct hci_conn *conn;
1454 struct iso_list_data data;
1457 /* Let's make sure that le is enabled.*/
1458 if (!hci_dev_test_flag(hdev, HCI_LE_ENABLED)) {
1459 if (lmp_le_capable(hdev))
1460 return ERR_PTR(-ECONNREFUSED);
1461 return ERR_PTR(-EOPNOTSUPP);
1464 err = qos_set_big(hdev, qos);
1466 return ERR_PTR(err);
1468 err = qos_set_bis(hdev, qos);
1470 return ERR_PTR(err);
1472 data.big = qos->big;
1473 data.bis = qos->bis;
1476 /* Check if there is already a matching BIG/BIS */
1477 hci_conn_hash_list_state(hdev, bis_list, ISO_LINK, BT_BOUND, &data);
1479 return ERR_PTR(-EADDRINUSE);
1481 conn = hci_conn_hash_lookup_bis(hdev, dst, qos->big, qos->bis);
1483 return ERR_PTR(-EADDRINUSE);
1485 conn = hci_conn_add(hdev, ISO_LINK, dst, HCI_ROLE_MASTER);
1487 return ERR_PTR(-ENOMEM);
1489 set_bit(HCI_CONN_PER_ADV, &conn->flags);
1490 conn->state = BT_CONNECT;
1492 hci_conn_hold(conn);
1496 /* This function requires the caller holds hdev->lock */
1497 struct hci_conn *hci_connect_le_scan(struct hci_dev *hdev, bdaddr_t *dst,
1498 u8 dst_type, u8 sec_level,
1500 enum conn_reasons conn_reason)
1502 struct hci_conn *conn;
1504 /* Let's make sure that le is enabled.*/
1505 if (!hci_dev_test_flag(hdev, HCI_LE_ENABLED)) {
1506 if (lmp_le_capable(hdev))
1507 return ERR_PTR(-ECONNREFUSED);
1509 return ERR_PTR(-EOPNOTSUPP);
1512 /* Some devices send ATT messages as soon as the physical link is
1513 * established. To be able to handle these ATT messages, the user-
1514 * space first establishes the connection and then starts the pairing
1517 * So if a hci_conn object already exists for the following connection
1518 * attempt, we simply update pending_sec_level and auth_type fields
1519 * and return the object found.
1521 conn = hci_conn_hash_lookup_le(hdev, dst, dst_type);
1523 if (conn->pending_sec_level < sec_level)
1524 conn->pending_sec_level = sec_level;
1528 BT_DBG("requesting refresh of dst_addr");
1530 conn = hci_conn_add(hdev, LE_LINK, dst, HCI_ROLE_MASTER);
1532 return ERR_PTR(-ENOMEM);
1534 if (hci_explicit_conn_params_set(hdev, dst, dst_type) < 0) {
1536 return ERR_PTR(-EBUSY);
1539 conn->state = BT_CONNECT;
1540 set_bit(HCI_CONN_SCANNING, &conn->flags);
1541 conn->dst_type = dst_type;
1542 conn->sec_level = BT_SECURITY_LOW;
1543 conn->pending_sec_level = sec_level;
1544 conn->conn_timeout = conn_timeout;
1545 conn->conn_reason = conn_reason;
1547 hci_update_passive_scan(hdev);
1550 hci_conn_hold(conn);
1554 struct hci_conn *hci_connect_acl(struct hci_dev *hdev, bdaddr_t *dst,
1555 u8 sec_level, u8 auth_type,
1556 enum conn_reasons conn_reason)
1558 struct hci_conn *acl;
1560 if (!hci_dev_test_flag(hdev, HCI_BREDR_ENABLED)) {
1561 if (lmp_bredr_capable(hdev))
1562 return ERR_PTR(-ECONNREFUSED);
1564 return ERR_PTR(-EOPNOTSUPP);
1567 acl = hci_conn_hash_lookup_ba(hdev, ACL_LINK, dst);
1569 acl = hci_conn_add(hdev, ACL_LINK, dst, HCI_ROLE_MASTER);
1571 return ERR_PTR(-ENOMEM);
1576 acl->conn_reason = conn_reason;
1577 if (acl->state == BT_OPEN || acl->state == BT_CLOSED) {
1578 acl->sec_level = BT_SECURITY_LOW;
1579 acl->pending_sec_level = sec_level;
1580 acl->auth_type = auth_type;
1581 hci_acl_create_connection(acl);
1587 struct hci_conn *hci_connect_sco(struct hci_dev *hdev, int type, bdaddr_t *dst,
1588 __u16 setting, struct bt_codec *codec)
1590 struct hci_conn *acl;
1591 struct hci_conn *sco;
1593 acl = hci_connect_acl(hdev, dst, BT_SECURITY_LOW, HCI_AT_NO_BONDING,
1594 CONN_REASON_SCO_CONNECT);
1598 sco = hci_conn_hash_lookup_ba(hdev, type, dst);
1600 sco = hci_conn_add(hdev, type, dst, HCI_ROLE_MASTER);
1603 return ERR_PTR(-ENOMEM);
1612 sco->setting = setting;
1613 sco->codec = *codec;
1615 if (acl->state == BT_CONNECTED &&
1616 (sco->state == BT_OPEN || sco->state == BT_CLOSED)) {
1617 set_bit(HCI_CONN_POWER_SAVE, &acl->flags);
1618 hci_conn_enter_active_mode(acl, BT_POWER_FORCE_ACTIVE_ON);
1620 if (test_bit(HCI_CONN_MODE_CHANGE_PEND, &acl->flags)) {
1621 /* defer SCO setup until mode change completed */
1622 set_bit(HCI_CONN_SCO_SETUP_PEND, &acl->flags);
1626 hci_sco_setup(acl, 0x00);
1632 static void cis_add(struct iso_list_data *d, struct bt_iso_qos *qos)
1634 struct hci_cis_params *cis = &d->pdu.cis[d->pdu.cp.num_cis];
1636 cis->cis_id = qos->cis;
1637 cis->c_sdu = cpu_to_le16(qos->out.sdu);
1638 cis->p_sdu = cpu_to_le16(qos->in.sdu);
1639 cis->c_phy = qos->out.phy ? qos->out.phy : qos->in.phy;
1640 cis->p_phy = qos->in.phy ? qos->in.phy : qos->out.phy;
1641 cis->c_rtn = qos->out.rtn;
1642 cis->p_rtn = qos->in.rtn;
1644 d->pdu.cp.num_cis++;
1647 static void cis_list(struct hci_conn *conn, void *data)
1649 struct iso_list_data *d = data;
1651 /* Skip if broadcast/ANY address */
1652 if (!bacmp(&conn->dst, BDADDR_ANY))
1655 if (d->cig != conn->iso_qos.cig || d->cis == BT_ISO_QOS_CIS_UNSET ||
1656 d->cis != conn->iso_qos.cis)
1661 if (d->pdu.cp.cig_id == BT_ISO_QOS_CIG_UNSET ||
1662 d->count >= ARRAY_SIZE(d->pdu.cis))
1665 cis_add(d, &conn->iso_qos);
1668 static int hci_le_create_big(struct hci_conn *conn, struct bt_iso_qos *qos)
1670 struct hci_dev *hdev = conn->hdev;
1671 struct hci_cp_le_create_big cp;
1673 memset(&cp, 0, sizeof(cp));
1675 cp.handle = qos->big;
1676 cp.adv_handle = qos->bis;
1678 hci_cpu_to_le24(qos->out.interval, cp.bis.sdu_interval);
1679 cp.bis.sdu = cpu_to_le16(qos->out.sdu);
1680 cp.bis.latency = cpu_to_le16(qos->out.latency);
1681 cp.bis.rtn = qos->out.rtn;
1682 cp.bis.phy = qos->out.phy;
1683 cp.bis.packing = qos->packing;
1684 cp.bis.framing = qos->framing;
1685 cp.bis.encryption = 0x00;
1686 memset(&cp.bis.bcode, 0, sizeof(cp.bis.bcode));
1688 return hci_send_cmd(hdev, HCI_OP_LE_CREATE_BIG, sizeof(cp), &cp);
1691 static bool hci_le_set_cig_params(struct hci_conn *conn, struct bt_iso_qos *qos)
1693 struct hci_dev *hdev = conn->hdev;
1694 struct iso_list_data data;
1696 memset(&data, 0, sizeof(data));
1698 /* Allocate a CIG if not set */
1699 if (qos->cig == BT_ISO_QOS_CIG_UNSET) {
1700 for (data.cig = 0x00; data.cig < 0xff; data.cig++) {
1704 hci_conn_hash_list_state(hdev, cis_list, ISO_LINK,
1709 hci_conn_hash_list_state(hdev, cis_list, ISO_LINK,
1710 BT_CONNECTED, &data);
1715 if (data.cig == 0xff)
1719 qos->cig = data.cig;
1722 data.pdu.cp.cig_id = qos->cig;
1723 hci_cpu_to_le24(qos->out.interval, data.pdu.cp.c_interval);
1724 hci_cpu_to_le24(qos->in.interval, data.pdu.cp.p_interval);
1725 data.pdu.cp.sca = qos->sca;
1726 data.pdu.cp.packing = qos->packing;
1727 data.pdu.cp.framing = qos->framing;
1728 data.pdu.cp.c_latency = cpu_to_le16(qos->out.latency);
1729 data.pdu.cp.p_latency = cpu_to_le16(qos->in.latency);
1731 if (qos->cis != BT_ISO_QOS_CIS_UNSET) {
1733 data.cig = qos->cig;
1734 data.cis = qos->cis;
1736 hci_conn_hash_list_state(hdev, cis_list, ISO_LINK, BT_BOUND,
1741 cis_add(&data, qos);
1744 /* Reprogram all CIS(s) with the same CIG */
1745 for (data.cig = qos->cig, data.cis = 0x00; data.cis < 0x11;
1749 hci_conn_hash_list_state(hdev, cis_list, ISO_LINK, BT_BOUND,
1754 /* Allocate a CIS if not set */
1755 if (qos->cis == BT_ISO_QOS_CIS_UNSET) {
1757 qos->cis = data.cis;
1758 cis_add(&data, qos);
1762 if (qos->cis == BT_ISO_QOS_CIS_UNSET || !data.pdu.cp.num_cis)
1765 if (hci_send_cmd(hdev, HCI_OP_LE_SET_CIG_PARAMS,
1766 sizeof(data.pdu.cp) +
1767 (data.pdu.cp.num_cis * sizeof(*data.pdu.cis)),
1774 struct hci_conn *hci_bind_cis(struct hci_dev *hdev, bdaddr_t *dst,
1775 __u8 dst_type, struct bt_iso_qos *qos)
1777 struct hci_conn *cis;
1779 cis = hci_conn_hash_lookup_cis(hdev, dst, dst_type);
1781 cis = hci_conn_add(hdev, ISO_LINK, dst, HCI_ROLE_MASTER);
1783 return ERR_PTR(-ENOMEM);
1784 cis->cleanup = cis_cleanup;
1785 cis->dst_type = dst_type;
1788 if (cis->state == BT_CONNECTED)
1791 /* Check if CIS has been set and the settings matches */
1792 if (cis->state == BT_BOUND &&
1793 !memcmp(&cis->iso_qos, qos, sizeof(*qos)))
1796 /* Update LINK PHYs according to QoS preference */
1797 cis->le_tx_phy = qos->out.phy;
1798 cis->le_rx_phy = qos->in.phy;
1800 /* If output interval is not set use the input interval as it cannot be
1803 if (!qos->out.interval)
1804 qos->out.interval = qos->in.interval;
1806 /* If input interval is not set use the output interval as it cannot be
1809 if (!qos->in.interval)
1810 qos->in.interval = qos->out.interval;
1812 /* If output latency is not set use the input latency as it cannot be
1815 if (!qos->out.latency)
1816 qos->out.latency = qos->in.latency;
1818 /* If input latency is not set use the output latency as it cannot be
1821 if (!qos->in.latency)
1822 qos->in.latency = qos->out.latency;
1824 if (!hci_le_set_cig_params(cis, qos)) {
1826 return ERR_PTR(-EINVAL);
1829 cis->iso_qos = *qos;
1830 cis->state = BT_BOUND;
1835 bool hci_iso_setup_path(struct hci_conn *conn)
1837 struct hci_dev *hdev = conn->hdev;
1838 struct hci_cp_le_setup_iso_path cmd;
1840 memset(&cmd, 0, sizeof(cmd));
1842 if (conn->iso_qos.out.sdu) {
1843 cmd.handle = cpu_to_le16(conn->handle);
1844 cmd.direction = 0x00; /* Input (Host to Controller) */
1845 cmd.path = 0x00; /* HCI path if enabled */
1846 cmd.codec = 0x03; /* Transparent Data */
1848 if (hci_send_cmd(hdev, HCI_OP_LE_SETUP_ISO_PATH, sizeof(cmd),
1853 if (conn->iso_qos.in.sdu) {
1854 cmd.handle = cpu_to_le16(conn->handle);
1855 cmd.direction = 0x01; /* Output (Controller to Host) */
1856 cmd.path = 0x00; /* HCI path if enabled */
1857 cmd.codec = 0x03; /* Transparent Data */
1859 if (hci_send_cmd(hdev, HCI_OP_LE_SETUP_ISO_PATH, sizeof(cmd),
1867 static int hci_create_cis_sync(struct hci_dev *hdev, void *data)
1870 struct hci_cp_le_create_cis cp;
1871 struct hci_cis cis[0x1f];
1873 struct hci_conn *conn = data;
1876 memset(&cmd, 0, sizeof(cmd));
1877 cmd.cis[0].acl_handle = cpu_to_le16(conn->link->handle);
1878 cmd.cis[0].cis_handle = cpu_to_le16(conn->handle);
1880 cig = conn->iso_qos.cig;
1886 list_for_each_entry_rcu(conn, &hdev->conn_hash.list, list) {
1887 struct hci_cis *cis = &cmd.cis[cmd.cp.num_cis];
1889 if (conn == data || conn->type != ISO_LINK ||
1890 conn->state == BT_CONNECTED || conn->iso_qos.cig != cig)
1893 /* Check if all CIS(s) belonging to a CIG are ready */
1894 if (!conn->link || conn->link->state != BT_CONNECTED ||
1895 conn->state != BT_CONNECT) {
1900 /* Group all CIS with state BT_CONNECT since the spec don't
1901 * allow to send them individually:
1903 * BLUETOOTH CORE SPECIFICATION Version 5.3 | Vol 4, Part E
1906 * If the Host issues this command before all the
1907 * HCI_LE_CIS_Established events from the previous use of the
1908 * command have been generated, the Controller shall return the
1909 * error code Command Disallowed (0x0C).
1911 cis->acl_handle = cpu_to_le16(conn->link->handle);
1912 cis->cis_handle = cpu_to_le16(conn->handle);
1918 hci_dev_unlock(hdev);
1920 if (!cmd.cp.num_cis)
1923 return hci_send_cmd(hdev, HCI_OP_LE_CREATE_CIS, sizeof(cmd.cp) +
1924 sizeof(cmd.cis[0]) * cmd.cp.num_cis, &cmd);
1927 int hci_le_create_cis(struct hci_conn *conn)
1929 struct hci_conn *cis;
1930 struct hci_dev *hdev = conn->hdev;
1933 switch (conn->type) {
1935 if (!conn->link || conn->state != BT_CONNECTED)
1946 if (cis->state == BT_CONNECT)
1949 /* Queue Create CIS */
1950 err = hci_cmd_sync_queue(hdev, hci_create_cis_sync, cis, NULL);
1954 cis->state = BT_CONNECT;
1959 static void hci_iso_qos_setup(struct hci_dev *hdev, struct hci_conn *conn,
1960 struct bt_iso_io_qos *qos, __u8 phy)
1962 /* Only set MTU if PHY is enabled */
1963 if (!qos->sdu && qos->phy) {
1964 if (hdev->iso_mtu > 0)
1965 qos->sdu = hdev->iso_mtu;
1966 else if (hdev->le_mtu > 0)
1967 qos->sdu = hdev->le_mtu;
1969 qos->sdu = hdev->acl_mtu;
1972 /* Use the same PHY as ACL if set to any */
1973 if (qos->phy == BT_ISO_PHY_ANY)
1976 /* Use LE ACL connection interval if not set */
1978 /* ACL interval unit in 1.25 ms to us */
1979 qos->interval = conn->le_conn_interval * 1250;
1981 /* Use LE ACL connection latency if not set */
1983 qos->latency = conn->le_conn_latency;
1986 static void hci_bind_bis(struct hci_conn *conn,
1987 struct bt_iso_qos *qos)
1989 /* Update LINK PHYs according to QoS preference */
1990 conn->le_tx_phy = qos->out.phy;
1991 conn->le_tx_phy = qos->out.phy;
1992 conn->iso_qos = *qos;
1993 conn->state = BT_BOUND;
1996 static int create_big_sync(struct hci_dev *hdev, void *data)
1998 struct hci_conn *conn = data;
1999 struct bt_iso_qos *qos = &conn->iso_qos;
2000 u16 interval, sync_interval = 0;
2004 if (qos->out.phy == 0x02)
2005 flags |= MGMT_ADV_FLAG_SEC_2M;
2007 /* Align intervals */
2008 interval = qos->out.interval / 1250;
2011 sync_interval = qos->sync_interval * 1600;
2013 err = hci_start_per_adv_sync(hdev, qos->bis, conn->le_per_adv_data_len,
2014 conn->le_per_adv_data, flags, interval,
2015 interval, sync_interval);
2019 return hci_le_create_big(conn, &conn->iso_qos);
2022 static void create_pa_complete(struct hci_dev *hdev, void *data, int err)
2024 struct hci_cp_le_pa_create_sync *cp = data;
2026 bt_dev_dbg(hdev, "");
2029 bt_dev_err(hdev, "Unable to create PA: %d", err);
2034 static int create_pa_sync(struct hci_dev *hdev, void *data)
2036 struct hci_cp_le_pa_create_sync *cp = data;
2039 err = __hci_cmd_sync_status(hdev, HCI_OP_LE_PA_CREATE_SYNC,
2040 sizeof(*cp), cp, HCI_CMD_TIMEOUT);
2042 hci_dev_clear_flag(hdev, HCI_PA_SYNC);
2046 return hci_update_passive_scan_sync(hdev);
2049 int hci_pa_create_sync(struct hci_dev *hdev, bdaddr_t *dst, __u8 dst_type,
2052 struct hci_cp_le_pa_create_sync *cp;
2054 if (hci_dev_test_and_set_flag(hdev, HCI_PA_SYNC))
2057 cp = kmalloc(sizeof(*cp), GFP_KERNEL);
2059 hci_dev_clear_flag(hdev, HCI_PA_SYNC);
2063 /* Convert from ISO socket address type to HCI address type */
2064 if (dst_type == BDADDR_LE_PUBLIC)
2065 dst_type = ADDR_LE_DEV_PUBLIC;
2067 dst_type = ADDR_LE_DEV_RANDOM;
2069 memset(cp, 0, sizeof(*cp));
2071 cp->addr_type = dst_type;
2072 bacpy(&cp->addr, dst);
2074 /* Queue start pa_create_sync and scan */
2075 return hci_cmd_sync_queue(hdev, create_pa_sync, cp, create_pa_complete);
2078 int hci_le_big_create_sync(struct hci_dev *hdev, struct bt_iso_qos *qos,
2079 __u16 sync_handle, __u8 num_bis, __u8 bis[])
2082 struct hci_cp_le_big_create_sync cp;
2087 if (num_bis > sizeof(pdu.bis))
2090 err = qos_set_big(hdev, qos);
2094 memset(&pdu, 0, sizeof(pdu));
2095 pdu.cp.handle = qos->big;
2096 pdu.cp.sync_handle = cpu_to_le16(sync_handle);
2097 pdu.cp.num_bis = num_bis;
2098 memcpy(pdu.bis, bis, num_bis);
2100 return hci_send_cmd(hdev, HCI_OP_LE_BIG_CREATE_SYNC,
2101 sizeof(pdu.cp) + num_bis, &pdu);
2104 static void create_big_complete(struct hci_dev *hdev, void *data, int err)
2106 struct hci_conn *conn = data;
2108 bt_dev_dbg(hdev, "conn %p", conn);
2111 bt_dev_err(hdev, "Unable to create BIG: %d", err);
2112 hci_connect_cfm(conn, err);
2117 struct hci_conn *hci_connect_bis(struct hci_dev *hdev, bdaddr_t *dst,
2118 __u8 dst_type, struct bt_iso_qos *qos,
2119 __u8 base_len, __u8 *base)
2121 struct hci_conn *conn;
2124 /* We need hci_conn object using the BDADDR_ANY as dst */
2125 conn = hci_add_bis(hdev, dst, qos);
2129 hci_bind_bis(conn, qos);
2131 /* Add Basic Announcement into Peridic Adv Data if BASE is set */
2132 if (base_len && base) {
2133 base_len = eir_append_service_data(conn->le_per_adv_data, 0,
2134 0x1851, base, base_len);
2135 conn->le_per_adv_data_len = base_len;
2138 /* Queue start periodic advertising and create BIG */
2139 err = hci_cmd_sync_queue(hdev, create_big_sync, conn,
2140 create_big_complete);
2142 hci_conn_drop(conn);
2143 return ERR_PTR(err);
2146 hci_iso_qos_setup(hdev, conn, &qos->out,
2147 conn->le_tx_phy ? conn->le_tx_phy :
2148 hdev->le_tx_def_phys);
2153 struct hci_conn *hci_connect_cis(struct hci_dev *hdev, bdaddr_t *dst,
2154 __u8 dst_type, struct bt_iso_qos *qos)
2156 struct hci_conn *le;
2157 struct hci_conn *cis;
2159 if (hci_dev_test_flag(hdev, HCI_ADVERTISING))
2160 le = hci_connect_le(hdev, dst, dst_type, false,
2162 HCI_LE_CONN_TIMEOUT,
2165 le = hci_connect_le_scan(hdev, dst, dst_type,
2167 HCI_LE_CONN_TIMEOUT,
2168 CONN_REASON_ISO_CONNECT);
2172 hci_iso_qos_setup(hdev, le, &qos->out,
2173 le->le_tx_phy ? le->le_tx_phy : hdev->le_tx_def_phys);
2174 hci_iso_qos_setup(hdev, le, &qos->in,
2175 le->le_rx_phy ? le->le_rx_phy : hdev->le_rx_def_phys);
2177 cis = hci_bind_cis(hdev, dst, dst_type, qos);
2188 /* If LE is already connected and CIS handle is already set proceed to
2189 * Create CIS immediately.
2191 if (le->state == BT_CONNECTED && cis->handle != HCI_CONN_HANDLE_UNSET)
2192 hci_le_create_cis(le);
2197 /* Check link security requirement */
2198 int hci_conn_check_link_mode(struct hci_conn *conn)
2200 BT_DBG("hcon %p", conn);
2202 /* In Secure Connections Only mode, it is required that Secure
2203 * Connections is used and the link is encrypted with AES-CCM
2204 * using a P-256 authenticated combination key.
2206 if (hci_dev_test_flag(conn->hdev, HCI_SC_ONLY)) {
2207 if (!hci_conn_sc_enabled(conn) ||
2208 !test_bit(HCI_CONN_AES_CCM, &conn->flags) ||
2209 conn->key_type != HCI_LK_AUTH_COMBINATION_P256)
2213 /* AES encryption is required for Level 4:
2215 * BLUETOOTH CORE SPECIFICATION Version 5.2 | Vol 3, Part C
2218 * 128-bit equivalent strength for link and encryption keys
2219 * required using FIPS approved algorithms (E0 not allowed,
2220 * SAFER+ not allowed, and P-192 not allowed; encryption key
2223 if (conn->sec_level == BT_SECURITY_FIPS &&
2224 !test_bit(HCI_CONN_AES_CCM, &conn->flags)) {
2225 bt_dev_err(conn->hdev,
2226 "Invalid security: Missing AES-CCM usage");
2230 if (hci_conn_ssp_enabled(conn) &&
2231 !test_bit(HCI_CONN_ENCRYPT, &conn->flags))
2237 /* Authenticate remote device */
2238 static int hci_conn_auth(struct hci_conn *conn, __u8 sec_level, __u8 auth_type)
2240 BT_DBG("hcon %p", conn);
2242 if (conn->pending_sec_level > sec_level)
2243 sec_level = conn->pending_sec_level;
2245 if (sec_level > conn->sec_level)
2246 conn->pending_sec_level = sec_level;
2247 else if (test_bit(HCI_CONN_AUTH, &conn->flags))
2250 /* Make sure we preserve an existing MITM requirement*/
2251 auth_type |= (conn->auth_type & 0x01);
2253 conn->auth_type = auth_type;
2255 if (!test_and_set_bit(HCI_CONN_AUTH_PEND, &conn->flags)) {
2256 struct hci_cp_auth_requested cp;
2258 cp.handle = cpu_to_le16(conn->handle);
2259 hci_send_cmd(conn->hdev, HCI_OP_AUTH_REQUESTED,
2262 /* If we're already encrypted set the REAUTH_PEND flag,
2263 * otherwise set the ENCRYPT_PEND.
2265 if (test_bit(HCI_CONN_ENCRYPT, &conn->flags))
2266 set_bit(HCI_CONN_REAUTH_PEND, &conn->flags);
2268 set_bit(HCI_CONN_ENCRYPT_PEND, &conn->flags);
2274 /* Encrypt the link */
2275 static void hci_conn_encrypt(struct hci_conn *conn)
2277 BT_DBG("hcon %p", conn);
2279 if (!test_and_set_bit(HCI_CONN_ENCRYPT_PEND, &conn->flags)) {
2280 struct hci_cp_set_conn_encrypt cp;
2281 cp.handle = cpu_to_le16(conn->handle);
2283 hci_send_cmd(conn->hdev, HCI_OP_SET_CONN_ENCRYPT, sizeof(cp),
2288 /* Enable security */
2289 int hci_conn_security(struct hci_conn *conn, __u8 sec_level, __u8 auth_type,
2292 BT_DBG("hcon %p", conn);
2294 if (conn->type == LE_LINK)
2295 return smp_conn_security(conn, sec_level);
2297 /* For sdp we don't need the link key. */
2298 if (sec_level == BT_SECURITY_SDP)
2301 /* For non 2.1 devices and low security level we don't need the link
2303 if (sec_level == BT_SECURITY_LOW && !hci_conn_ssp_enabled(conn))
2306 /* For other security levels we need the link key. */
2307 if (!test_bit(HCI_CONN_AUTH, &conn->flags))
2310 /* An authenticated FIPS approved combination key has sufficient
2311 * security for security level 4. */
2312 if (conn->key_type == HCI_LK_AUTH_COMBINATION_P256 &&
2313 sec_level == BT_SECURITY_FIPS)
2316 /* An authenticated combination key has sufficient security for
2317 security level 3. */
2318 if ((conn->key_type == HCI_LK_AUTH_COMBINATION_P192 ||
2319 conn->key_type == HCI_LK_AUTH_COMBINATION_P256) &&
2320 sec_level == BT_SECURITY_HIGH)
2323 /* An unauthenticated combination key has sufficient security for
2324 security level 1 and 2. */
2325 if ((conn->key_type == HCI_LK_UNAUTH_COMBINATION_P192 ||
2326 conn->key_type == HCI_LK_UNAUTH_COMBINATION_P256) &&
2327 (sec_level == BT_SECURITY_MEDIUM || sec_level == BT_SECURITY_LOW))
2330 /* A combination key has always sufficient security for the security
2331 levels 1 or 2. High security level requires the combination key
2332 is generated using maximum PIN code length (16).
2333 For pre 2.1 units. */
2334 if (conn->key_type == HCI_LK_COMBINATION &&
2335 (sec_level == BT_SECURITY_MEDIUM || sec_level == BT_SECURITY_LOW ||
2336 conn->pin_length == 16))
2340 if (test_bit(HCI_CONN_ENCRYPT_PEND, &conn->flags))
2344 set_bit(HCI_CONN_AUTH_INITIATOR, &conn->flags);
2346 if (!hci_conn_auth(conn, sec_level, auth_type))
2350 if (test_bit(HCI_CONN_ENCRYPT, &conn->flags)) {
2351 /* Ensure that the encryption key size has been read,
2352 * otherwise stall the upper layer responses.
2354 if (!conn->enc_key_size)
2357 /* Nothing else needed, all requirements are met */
2361 hci_conn_encrypt(conn);
2364 EXPORT_SYMBOL(hci_conn_security);
2366 /* Check secure link requirement */
2367 int hci_conn_check_secure(struct hci_conn *conn, __u8 sec_level)
2369 BT_DBG("hcon %p", conn);
2371 /* Accept if non-secure or higher security level is required */
2372 if (sec_level != BT_SECURITY_HIGH && sec_level != BT_SECURITY_FIPS)
2375 /* Accept if secure or higher security level is already present */
2376 if (conn->sec_level == BT_SECURITY_HIGH ||
2377 conn->sec_level == BT_SECURITY_FIPS)
2380 /* Reject not secure link */
2383 EXPORT_SYMBOL(hci_conn_check_secure);
2386 int hci_conn_switch_role(struct hci_conn *conn, __u8 role)
2388 BT_DBG("hcon %p", conn);
2390 if (role == conn->role)
2393 if (!test_and_set_bit(HCI_CONN_RSWITCH_PEND, &conn->flags)) {
2394 struct hci_cp_switch_role cp;
2395 bacpy(&cp.bdaddr, &conn->dst);
2397 hci_send_cmd(conn->hdev, HCI_OP_SWITCH_ROLE, sizeof(cp), &cp);
2402 EXPORT_SYMBOL(hci_conn_switch_role);
2404 /* Enter active mode */
2405 void hci_conn_enter_active_mode(struct hci_conn *conn, __u8 force_active)
2407 struct hci_dev *hdev = conn->hdev;
2409 BT_DBG("hcon %p mode %d", conn, conn->mode);
2411 if (conn->mode != HCI_CM_SNIFF)
2414 if (!test_bit(HCI_CONN_POWER_SAVE, &conn->flags) && !force_active)
2417 if (!test_and_set_bit(HCI_CONN_MODE_CHANGE_PEND, &conn->flags)) {
2418 struct hci_cp_exit_sniff_mode cp;
2419 cp.handle = cpu_to_le16(conn->handle);
2420 hci_send_cmd(hdev, HCI_OP_EXIT_SNIFF_MODE, sizeof(cp), &cp);
2424 if (hdev->idle_timeout > 0)
2425 queue_delayed_work(hdev->workqueue, &conn->idle_work,
2426 msecs_to_jiffies(hdev->idle_timeout));
2429 /* Drop all connection on the device */
2430 void hci_conn_hash_flush(struct hci_dev *hdev)
2432 struct hci_conn_hash *h = &hdev->conn_hash;
2433 struct hci_conn *c, *n;
2435 BT_DBG("hdev %s", hdev->name);
2437 list_for_each_entry_safe(c, n, &h->list, list) {
2438 c->state = BT_CLOSED;
2440 hci_disconn_cfm(c, HCI_ERROR_LOCAL_HOST_TERM);
2445 /* Check pending connect attempts */
2446 void hci_conn_check_pending(struct hci_dev *hdev)
2448 struct hci_conn *conn;
2450 BT_DBG("hdev %s", hdev->name);
2454 conn = hci_conn_hash_lookup_state(hdev, ACL_LINK, BT_CONNECT2);
2456 hci_acl_create_connection(conn);
2458 hci_dev_unlock(hdev);
2461 static u32 get_link_mode(struct hci_conn *conn)
2465 if (conn->role == HCI_ROLE_MASTER)
2466 link_mode |= HCI_LM_MASTER;
2468 if (test_bit(HCI_CONN_ENCRYPT, &conn->flags))
2469 link_mode |= HCI_LM_ENCRYPT;
2471 if (test_bit(HCI_CONN_AUTH, &conn->flags))
2472 link_mode |= HCI_LM_AUTH;
2474 if (test_bit(HCI_CONN_SECURE, &conn->flags))
2475 link_mode |= HCI_LM_SECURE;
2477 if (test_bit(HCI_CONN_FIPS, &conn->flags))
2478 link_mode |= HCI_LM_FIPS;
2483 int hci_get_conn_list(void __user *arg)
2486 struct hci_conn_list_req req, *cl;
2487 struct hci_conn_info *ci;
2488 struct hci_dev *hdev;
2489 int n = 0, size, err;
2491 if (copy_from_user(&req, arg, sizeof(req)))
2494 if (!req.conn_num || req.conn_num > (PAGE_SIZE * 2) / sizeof(*ci))
2497 size = sizeof(req) + req.conn_num * sizeof(*ci);
2499 cl = kmalloc(size, GFP_KERNEL);
2503 hdev = hci_dev_get(req.dev_id);
2512 list_for_each_entry(c, &hdev->conn_hash.list, list) {
2513 bacpy(&(ci + n)->bdaddr, &c->dst);
2514 (ci + n)->handle = c->handle;
2515 (ci + n)->type = c->type;
2516 (ci + n)->out = c->out;
2517 (ci + n)->state = c->state;
2518 (ci + n)->link_mode = get_link_mode(c);
2519 if (++n >= req.conn_num)
2522 hci_dev_unlock(hdev);
2524 cl->dev_id = hdev->id;
2526 size = sizeof(req) + n * sizeof(*ci);
2530 err = copy_to_user(arg, cl, size);
2533 return err ? -EFAULT : 0;
2536 int hci_get_conn_info(struct hci_dev *hdev, void __user *arg)
2538 struct hci_conn_info_req req;
2539 struct hci_conn_info ci;
2540 struct hci_conn *conn;
2541 char __user *ptr = arg + sizeof(req);
2543 if (copy_from_user(&req, arg, sizeof(req)))
2547 conn = hci_conn_hash_lookup_ba(hdev, req.type, &req.bdaddr);
2549 bacpy(&ci.bdaddr, &conn->dst);
2550 ci.handle = conn->handle;
2551 ci.type = conn->type;
2553 ci.state = conn->state;
2554 ci.link_mode = get_link_mode(conn);
2556 hci_dev_unlock(hdev);
2561 return copy_to_user(ptr, &ci, sizeof(ci)) ? -EFAULT : 0;
2564 int hci_get_auth_info(struct hci_dev *hdev, void __user *arg)
2566 struct hci_auth_info_req req;
2567 struct hci_conn *conn;
2569 if (copy_from_user(&req, arg, sizeof(req)))
2573 conn = hci_conn_hash_lookup_ba(hdev, ACL_LINK, &req.bdaddr);
2575 req.type = conn->auth_type;
2576 hci_dev_unlock(hdev);
2581 return copy_to_user(arg, &req, sizeof(req)) ? -EFAULT : 0;
2584 struct hci_chan *hci_chan_create(struct hci_conn *conn)
2586 struct hci_dev *hdev = conn->hdev;
2587 struct hci_chan *chan;
2589 BT_DBG("%s hcon %p", hdev->name, conn);
2591 if (test_bit(HCI_CONN_DROP, &conn->flags)) {
2592 BT_DBG("Refusing to create new hci_chan");
2596 chan = kzalloc(sizeof(*chan), GFP_KERNEL);
2600 chan->conn = hci_conn_get(conn);
2601 skb_queue_head_init(&chan->data_q);
2602 chan->state = BT_CONNECTED;
2604 list_add_rcu(&chan->list, &conn->chan_list);
2609 void hci_chan_del(struct hci_chan *chan)
2611 struct hci_conn *conn = chan->conn;
2612 struct hci_dev *hdev = conn->hdev;
2614 BT_DBG("%s hcon %p chan %p", hdev->name, conn, chan);
2616 list_del_rcu(&chan->list);
2620 /* Prevent new hci_chan's to be created for this hci_conn */
2621 set_bit(HCI_CONN_DROP, &conn->flags);
2625 skb_queue_purge(&chan->data_q);
2629 void hci_chan_list_flush(struct hci_conn *conn)
2631 struct hci_chan *chan, *n;
2633 BT_DBG("hcon %p", conn);
2635 list_for_each_entry_safe(chan, n, &conn->chan_list, list)
2639 static struct hci_chan *__hci_chan_lookup_handle(struct hci_conn *hcon,
2642 struct hci_chan *hchan;
2644 list_for_each_entry(hchan, &hcon->chan_list, list) {
2645 if (hchan->handle == handle)
2652 struct hci_chan *hci_chan_lookup_handle(struct hci_dev *hdev, __u16 handle)
2654 struct hci_conn_hash *h = &hdev->conn_hash;
2655 struct hci_conn *hcon;
2656 struct hci_chan *hchan = NULL;
2660 list_for_each_entry_rcu(hcon, &h->list, list) {
2661 hchan = __hci_chan_lookup_handle(hcon, handle);
2671 u32 hci_conn_get_phy(struct hci_conn *conn)
2675 /* BLUETOOTH CORE SPECIFICATION Version 5.2 | Vol 2, Part B page 471:
2676 * Table 6.2: Packets defined for synchronous, asynchronous, and
2677 * CPB logical transport types.
2679 switch (conn->type) {
2681 /* SCO logical transport (1 Mb/s):
2682 * HV1, HV2, HV3 and DV.
2684 phys |= BT_PHY_BR_1M_1SLOT;
2689 /* ACL logical transport (1 Mb/s) ptt=0:
2690 * DH1, DM3, DH3, DM5 and DH5.
2692 phys |= BT_PHY_BR_1M_1SLOT;
2694 if (conn->pkt_type & (HCI_DM3 | HCI_DH3))
2695 phys |= BT_PHY_BR_1M_3SLOT;
2697 if (conn->pkt_type & (HCI_DM5 | HCI_DH5))
2698 phys |= BT_PHY_BR_1M_5SLOT;
2700 /* ACL logical transport (2 Mb/s) ptt=1:
2701 * 2-DH1, 2-DH3 and 2-DH5.
2703 if (!(conn->pkt_type & HCI_2DH1))
2704 phys |= BT_PHY_EDR_2M_1SLOT;
2706 if (!(conn->pkt_type & HCI_2DH3))
2707 phys |= BT_PHY_EDR_2M_3SLOT;
2709 if (!(conn->pkt_type & HCI_2DH5))
2710 phys |= BT_PHY_EDR_2M_5SLOT;
2712 /* ACL logical transport (3 Mb/s) ptt=1:
2713 * 3-DH1, 3-DH3 and 3-DH5.
2715 if (!(conn->pkt_type & HCI_3DH1))
2716 phys |= BT_PHY_EDR_3M_1SLOT;
2718 if (!(conn->pkt_type & HCI_3DH3))
2719 phys |= BT_PHY_EDR_3M_3SLOT;
2721 if (!(conn->pkt_type & HCI_3DH5))
2722 phys |= BT_PHY_EDR_3M_5SLOT;
2727 /* eSCO logical transport (1 Mb/s): EV3, EV4 and EV5 */
2728 phys |= BT_PHY_BR_1M_1SLOT;
2730 if (!(conn->pkt_type & (ESCO_EV4 | ESCO_EV5)))
2731 phys |= BT_PHY_BR_1M_3SLOT;
2733 /* eSCO logical transport (2 Mb/s): 2-EV3, 2-EV5 */
2734 if (!(conn->pkt_type & ESCO_2EV3))
2735 phys |= BT_PHY_EDR_2M_1SLOT;
2737 if (!(conn->pkt_type & ESCO_2EV5))
2738 phys |= BT_PHY_EDR_2M_3SLOT;
2740 /* eSCO logical transport (3 Mb/s): 3-EV3, 3-EV5 */
2741 if (!(conn->pkt_type & ESCO_3EV3))
2742 phys |= BT_PHY_EDR_3M_1SLOT;
2744 if (!(conn->pkt_type & ESCO_3EV5))
2745 phys |= BT_PHY_EDR_3M_3SLOT;
2750 if (conn->le_tx_phy & HCI_LE_SET_PHY_1M)
2751 phys |= BT_PHY_LE_1M_TX;
2753 if (conn->le_rx_phy & HCI_LE_SET_PHY_1M)
2754 phys |= BT_PHY_LE_1M_RX;
2756 if (conn->le_tx_phy & HCI_LE_SET_PHY_2M)
2757 phys |= BT_PHY_LE_2M_TX;
2759 if (conn->le_rx_phy & HCI_LE_SET_PHY_2M)
2760 phys |= BT_PHY_LE_2M_RX;
2762 if (conn->le_tx_phy & HCI_LE_SET_PHY_CODED)
2763 phys |= BT_PHY_LE_CODED_TX;
2765 if (conn->le_rx_phy & HCI_LE_SET_PHY_CODED)
2766 phys |= BT_PHY_LE_CODED_RX;
2774 int hci_abort_conn(struct hci_conn *conn, u8 reason)
2778 switch (conn->state) {
2781 if (conn->type == AMP_LINK) {
2782 struct hci_cp_disconn_phy_link cp;
2784 cp.phy_handle = HCI_PHY_HANDLE(conn->handle);
2786 r = hci_send_cmd(conn->hdev, HCI_OP_DISCONN_PHY_LINK,
2789 struct hci_cp_disconnect dc;
2791 dc.handle = cpu_to_le16(conn->handle);
2793 r = hci_send_cmd(conn->hdev, HCI_OP_DISCONNECT,
2797 conn->state = BT_DISCONN;
2801 if (conn->type == LE_LINK) {
2802 if (test_bit(HCI_CONN_SCANNING, &conn->flags))
2804 r = hci_send_cmd(conn->hdev,
2805 HCI_OP_LE_CREATE_CONN_CANCEL, 0, NULL);
2806 } else if (conn->type == ACL_LINK) {
2807 if (conn->hdev->hci_ver < BLUETOOTH_VER_1_2)
2809 r = hci_send_cmd(conn->hdev,
2810 HCI_OP_CREATE_CONN_CANCEL,
2815 if (conn->type == ACL_LINK) {
2816 struct hci_cp_reject_conn_req rej;
2818 bacpy(&rej.bdaddr, &conn->dst);
2819 rej.reason = reason;
2821 r = hci_send_cmd(conn->hdev,
2822 HCI_OP_REJECT_CONN_REQ,
2824 } else if (conn->type == SCO_LINK || conn->type == ESCO_LINK) {
2825 struct hci_cp_reject_sync_conn_req rej;
2827 bacpy(&rej.bdaddr, &conn->dst);
2829 /* SCO rejection has its own limited set of
2830 * allowed error values (0x0D-0x0F) which isn't
2831 * compatible with most values passed to this
2832 * function. To be safe hard-code one of the
2833 * values that's suitable for SCO.
2835 rej.reason = HCI_ERROR_REJ_LIMITED_RESOURCES;
2837 r = hci_send_cmd(conn->hdev,
2838 HCI_OP_REJECT_SYNC_CONN_REQ,
2843 conn->state = BT_CLOSED;