2 BlueZ - Bluetooth protocol stack for Linux
3 Copyright (c) 2000-2001, 2010, Code Aurora Forum. All rights reserved.
6 Written 2000,2001 by Maxim Krasnyansky <maxk@qualcomm.com>
8 This program is free software; you can redistribute it and/or modify
9 it under the terms of the GNU General Public License version 2 as
10 published by the Free Software Foundation;
12 THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
13 OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
14 FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT OF THIRD PARTY RIGHTS.
15 IN NO EVENT SHALL THE COPYRIGHT HOLDER(S) AND AUTHOR(S) BE LIABLE FOR ANY
16 CLAIM, OR ANY SPECIAL INDIRECT OR CONSEQUENTIAL DAMAGES, OR ANY DAMAGES
17 WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
18 ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
19 OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
21 ALL LIABILITY, INCLUDING LIABILITY FOR INFRINGEMENT OF ANY PATENTS,
22 COPYRIGHTS, TRADEMARKS OR OTHER RIGHTS, RELATING TO USE OF THIS
23 SOFTWARE IS DISCLAIMED.
26 /* Bluetooth HCI connection handling. */
28 #include <linux/export.h>
29 #include <linux/debugfs.h>
31 #include <net/bluetooth/bluetooth.h>
32 #include <net/bluetooth/hci_core.h>
33 #include <net/bluetooth/l2cap.h>
34 #include <net/bluetooth/iso.h>
35 #include <net/bluetooth/mgmt.h>
37 #include "hci_request.h"
48 struct conn_handle_t {
49 struct hci_conn *conn;
53 static const struct sco_param esco_param_cvsd[] = {
54 { EDR_ESCO_MASK & ~ESCO_2EV3, 0x000a, 0x01 }, /* S3 */
55 { EDR_ESCO_MASK & ~ESCO_2EV3, 0x0007, 0x01 }, /* S2 */
56 { EDR_ESCO_MASK | ESCO_EV3, 0x0007, 0x01 }, /* S1 */
57 { EDR_ESCO_MASK | ESCO_HV3, 0xffff, 0x01 }, /* D1 */
58 { EDR_ESCO_MASK | ESCO_HV1, 0xffff, 0x01 }, /* D0 */
61 static const struct sco_param sco_param_cvsd[] = {
62 { EDR_ESCO_MASK | ESCO_HV3, 0xffff, 0xff }, /* D1 */
63 { EDR_ESCO_MASK | ESCO_HV1, 0xffff, 0xff }, /* D0 */
66 static const struct sco_param esco_param_msbc[] = {
67 { EDR_ESCO_MASK & ~ESCO_2EV3, 0x000d, 0x02 }, /* T2 */
68 { EDR_ESCO_MASK | ESCO_EV3, 0x0008, 0x02 }, /* T1 */
71 /* This function requires the caller holds hdev->lock */
72 static void hci_connect_le_scan_cleanup(struct hci_conn *conn, u8 status)
74 struct hci_conn_params *params;
75 struct hci_dev *hdev = conn->hdev;
81 bdaddr_type = conn->dst_type;
83 /* Check if we need to convert to identity address */
84 irk = hci_get_irk(hdev, bdaddr, bdaddr_type);
86 bdaddr = &irk->bdaddr;
87 bdaddr_type = irk->addr_type;
90 params = hci_pend_le_action_lookup(&hdev->pend_le_conns, bdaddr,
96 hci_conn_drop(params->conn);
97 hci_conn_put(params->conn);
101 if (!params->explicit_connect)
104 /* If the status indicates successful cancellation of
105 * the attempt (i.e. Unknown Connection Id) there's no point of
106 * notifying failure since we'll go back to keep trying to
107 * connect. The only exception is explicit connect requests
108 * where a timeout + cancel does indicate an actual failure.
110 if (status && status != HCI_ERROR_UNKNOWN_CONN_ID)
111 mgmt_connect_failed(hdev, &conn->dst, conn->type,
112 conn->dst_type, status);
114 /* The connection attempt was doing scan for new RPA, and is
115 * in scan phase. If params are not associated with any other
116 * autoconnect action, remove them completely. If they are, just unmark
117 * them as waiting for connection, by clearing explicit_connect field.
119 params->explicit_connect = false;
121 hci_pend_le_list_del_init(params);
123 switch (params->auto_connect) {
124 case HCI_AUTO_CONN_EXPLICIT:
125 hci_conn_params_del(hdev, bdaddr, bdaddr_type);
126 /* return instead of break to avoid duplicate scan update */
128 case HCI_AUTO_CONN_DIRECT:
129 case HCI_AUTO_CONN_ALWAYS:
130 hci_pend_le_list_add(params, &hdev->pend_le_conns);
132 case HCI_AUTO_CONN_REPORT:
133 hci_pend_le_list_add(params, &hdev->pend_le_reports);
139 hci_update_passive_scan(hdev);
142 static void hci_conn_cleanup(struct hci_conn *conn)
144 struct hci_dev *hdev = conn->hdev;
146 if (test_bit(HCI_CONN_PARAM_REMOVAL_PEND, &conn->flags))
147 hci_conn_params_del(conn->hdev, &conn->dst, conn->dst_type);
149 if (test_and_clear_bit(HCI_CONN_FLUSH_KEY, &conn->flags))
150 hci_remove_link_key(hdev, &conn->dst);
152 hci_chan_list_flush(conn);
154 hci_conn_hash_del(hdev, conn);
156 if (HCI_CONN_HANDLE_UNSET(conn->handle))
157 ida_free(&hdev->unset_handle_ida, conn->handle);
162 if (conn->type == SCO_LINK || conn->type == ESCO_LINK) {
163 switch (conn->setting & SCO_AIRMODE_MASK) {
164 case SCO_AIRMODE_CVSD:
165 case SCO_AIRMODE_TRANSP:
167 hdev->notify(hdev, HCI_NOTIFY_DISABLE_SCO);
172 hdev->notify(hdev, HCI_NOTIFY_CONN_DEL);
175 debugfs_remove_recursive(conn->debugfs);
177 hci_conn_del_sysfs(conn);
182 static void hci_acl_create_connection(struct hci_conn *conn)
184 struct hci_dev *hdev = conn->hdev;
185 struct inquiry_entry *ie;
186 struct hci_cp_create_conn cp;
188 BT_DBG("hcon %p", conn);
190 /* Many controllers disallow HCI Create Connection while it is doing
191 * HCI Inquiry. So we cancel the Inquiry first before issuing HCI Create
192 * Connection. This may cause the MGMT discovering state to become false
193 * without user space's request but it is okay since the MGMT Discovery
194 * APIs do not promise that discovery should be done forever. Instead,
195 * the user space monitors the status of MGMT discovering and it may
196 * request for discovery again when this flag becomes false.
198 if (test_bit(HCI_INQUIRY, &hdev->flags)) {
199 /* Put this connection to "pending" state so that it will be
200 * executed after the inquiry cancel command complete event.
202 conn->state = BT_CONNECT2;
203 hci_send_cmd(hdev, HCI_OP_INQUIRY_CANCEL, 0, NULL);
207 conn->state = BT_CONNECT;
209 conn->role = HCI_ROLE_MASTER;
213 conn->link_policy = hdev->link_policy;
215 memset(&cp, 0, sizeof(cp));
216 bacpy(&cp.bdaddr, &conn->dst);
217 cp.pscan_rep_mode = 0x02;
219 ie = hci_inquiry_cache_lookup(hdev, &conn->dst);
221 if (inquiry_entry_age(ie) <= INQUIRY_ENTRY_AGE_MAX) {
222 cp.pscan_rep_mode = ie->data.pscan_rep_mode;
223 cp.pscan_mode = ie->data.pscan_mode;
224 cp.clock_offset = ie->data.clock_offset |
228 memcpy(conn->dev_class, ie->data.dev_class, 3);
231 cp.pkt_type = cpu_to_le16(conn->pkt_type);
232 if (lmp_rswitch_capable(hdev) && !(hdev->link_mode & HCI_LM_MASTER))
233 cp.role_switch = 0x01;
235 cp.role_switch = 0x00;
237 hci_send_cmd(hdev, HCI_OP_CREATE_CONN, sizeof(cp), &cp);
240 int hci_disconnect(struct hci_conn *conn, __u8 reason)
242 BT_DBG("hcon %p", conn);
244 /* When we are central of an established connection and it enters
245 * the disconnect timeout, then go ahead and try to read the
246 * current clock offset. Processing of the result is done
247 * within the event handling and hci_clock_offset_evt function.
249 if (conn->type == ACL_LINK && conn->role == HCI_ROLE_MASTER &&
250 (conn->state == BT_CONNECTED || conn->state == BT_CONFIG)) {
251 struct hci_dev *hdev = conn->hdev;
252 struct hci_cp_read_clock_offset clkoff_cp;
254 clkoff_cp.handle = cpu_to_le16(conn->handle);
255 hci_send_cmd(hdev, HCI_OP_READ_CLOCK_OFFSET, sizeof(clkoff_cp),
259 return hci_abort_conn(conn, reason);
262 static void hci_add_sco(struct hci_conn *conn, __u16 handle)
264 struct hci_dev *hdev = conn->hdev;
265 struct hci_cp_add_sco cp;
267 BT_DBG("hcon %p", conn);
269 conn->state = BT_CONNECT;
274 cp.handle = cpu_to_le16(handle);
275 cp.pkt_type = cpu_to_le16(conn->pkt_type);
277 hci_send_cmd(hdev, HCI_OP_ADD_SCO, sizeof(cp), &cp);
280 static bool find_next_esco_param(struct hci_conn *conn,
281 const struct sco_param *esco_param, int size)
286 for (; conn->attempt <= size; conn->attempt++) {
287 if (lmp_esco_2m_capable(conn->parent) ||
288 (esco_param[conn->attempt - 1].pkt_type & ESCO_2EV3))
290 BT_DBG("hcon %p skipped attempt %d, eSCO 2M not supported",
291 conn, conn->attempt);
294 return conn->attempt <= size;
297 static int configure_datapath_sync(struct hci_dev *hdev, struct bt_codec *codec)
300 __u8 vnd_len, *vnd_data = NULL;
301 struct hci_op_configure_data_path *cmd = NULL;
303 err = hdev->get_codec_config_data(hdev, ESCO_LINK, codec, &vnd_len,
308 cmd = kzalloc(sizeof(*cmd) + vnd_len, GFP_KERNEL);
314 err = hdev->get_data_path_id(hdev, &cmd->data_path_id);
318 cmd->vnd_len = vnd_len;
319 memcpy(cmd->vnd_data, vnd_data, vnd_len);
321 cmd->direction = 0x00;
322 __hci_cmd_sync_status(hdev, HCI_CONFIGURE_DATA_PATH,
323 sizeof(*cmd) + vnd_len, cmd, HCI_CMD_TIMEOUT);
325 cmd->direction = 0x01;
326 err = __hci_cmd_sync_status(hdev, HCI_CONFIGURE_DATA_PATH,
327 sizeof(*cmd) + vnd_len, cmd,
336 static int hci_enhanced_setup_sync(struct hci_dev *hdev, void *data)
338 struct conn_handle_t *conn_handle = data;
339 struct hci_conn *conn = conn_handle->conn;
340 __u16 handle = conn_handle->handle;
341 struct hci_cp_enhanced_setup_sync_conn cp;
342 const struct sco_param *param;
346 bt_dev_dbg(hdev, "hcon %p", conn);
348 /* for offload use case, codec needs to configured before opening SCO */
349 if (conn->codec.data_path)
350 configure_datapath_sync(hdev, &conn->codec);
352 conn->state = BT_CONNECT;
357 memset(&cp, 0x00, sizeof(cp));
359 cp.handle = cpu_to_le16(handle);
361 cp.tx_bandwidth = cpu_to_le32(0x00001f40);
362 cp.rx_bandwidth = cpu_to_le32(0x00001f40);
364 switch (conn->codec.id) {
366 if (!find_next_esco_param(conn, esco_param_msbc,
367 ARRAY_SIZE(esco_param_msbc)))
370 param = &esco_param_msbc[conn->attempt - 1];
371 cp.tx_coding_format.id = 0x05;
372 cp.rx_coding_format.id = 0x05;
373 cp.tx_codec_frame_size = __cpu_to_le16(60);
374 cp.rx_codec_frame_size = __cpu_to_le16(60);
375 cp.in_bandwidth = __cpu_to_le32(32000);
376 cp.out_bandwidth = __cpu_to_le32(32000);
377 cp.in_coding_format.id = 0x04;
378 cp.out_coding_format.id = 0x04;
379 cp.in_coded_data_size = __cpu_to_le16(16);
380 cp.out_coded_data_size = __cpu_to_le16(16);
381 cp.in_pcm_data_format = 2;
382 cp.out_pcm_data_format = 2;
383 cp.in_pcm_sample_payload_msb_pos = 0;
384 cp.out_pcm_sample_payload_msb_pos = 0;
385 cp.in_data_path = conn->codec.data_path;
386 cp.out_data_path = conn->codec.data_path;
387 cp.in_transport_unit_size = 1;
388 cp.out_transport_unit_size = 1;
391 case BT_CODEC_TRANSPARENT:
392 if (!find_next_esco_param(conn, esco_param_msbc,
393 ARRAY_SIZE(esco_param_msbc)))
395 param = &esco_param_msbc[conn->attempt - 1];
396 cp.tx_coding_format.id = 0x03;
397 cp.rx_coding_format.id = 0x03;
398 cp.tx_codec_frame_size = __cpu_to_le16(60);
399 cp.rx_codec_frame_size = __cpu_to_le16(60);
400 cp.in_bandwidth = __cpu_to_le32(0x1f40);
401 cp.out_bandwidth = __cpu_to_le32(0x1f40);
402 cp.in_coding_format.id = 0x03;
403 cp.out_coding_format.id = 0x03;
404 cp.in_coded_data_size = __cpu_to_le16(16);
405 cp.out_coded_data_size = __cpu_to_le16(16);
406 cp.in_pcm_data_format = 2;
407 cp.out_pcm_data_format = 2;
408 cp.in_pcm_sample_payload_msb_pos = 0;
409 cp.out_pcm_sample_payload_msb_pos = 0;
410 cp.in_data_path = conn->codec.data_path;
411 cp.out_data_path = conn->codec.data_path;
412 cp.in_transport_unit_size = 1;
413 cp.out_transport_unit_size = 1;
417 if (conn->parent && lmp_esco_capable(conn->parent)) {
418 if (!find_next_esco_param(conn, esco_param_cvsd,
419 ARRAY_SIZE(esco_param_cvsd)))
421 param = &esco_param_cvsd[conn->attempt - 1];
423 if (conn->attempt > ARRAY_SIZE(sco_param_cvsd))
425 param = &sco_param_cvsd[conn->attempt - 1];
427 cp.tx_coding_format.id = 2;
428 cp.rx_coding_format.id = 2;
429 cp.tx_codec_frame_size = __cpu_to_le16(60);
430 cp.rx_codec_frame_size = __cpu_to_le16(60);
431 cp.in_bandwidth = __cpu_to_le32(16000);
432 cp.out_bandwidth = __cpu_to_le32(16000);
433 cp.in_coding_format.id = 4;
434 cp.out_coding_format.id = 4;
435 cp.in_coded_data_size = __cpu_to_le16(16);
436 cp.out_coded_data_size = __cpu_to_le16(16);
437 cp.in_pcm_data_format = 2;
438 cp.out_pcm_data_format = 2;
439 cp.in_pcm_sample_payload_msb_pos = 0;
440 cp.out_pcm_sample_payload_msb_pos = 0;
441 cp.in_data_path = conn->codec.data_path;
442 cp.out_data_path = conn->codec.data_path;
443 cp.in_transport_unit_size = 16;
444 cp.out_transport_unit_size = 16;
450 cp.retrans_effort = param->retrans_effort;
451 cp.pkt_type = __cpu_to_le16(param->pkt_type);
452 cp.max_latency = __cpu_to_le16(param->max_latency);
454 if (hci_send_cmd(hdev, HCI_OP_ENHANCED_SETUP_SYNC_CONN, sizeof(cp), &cp) < 0)
460 static bool hci_setup_sync_conn(struct hci_conn *conn, __u16 handle)
462 struct hci_dev *hdev = conn->hdev;
463 struct hci_cp_setup_sync_conn cp;
464 const struct sco_param *param;
466 bt_dev_dbg(hdev, "hcon %p", conn);
468 conn->state = BT_CONNECT;
473 cp.handle = cpu_to_le16(handle);
475 cp.tx_bandwidth = cpu_to_le32(0x00001f40);
476 cp.rx_bandwidth = cpu_to_le32(0x00001f40);
477 cp.voice_setting = cpu_to_le16(conn->setting);
479 switch (conn->setting & SCO_AIRMODE_MASK) {
480 case SCO_AIRMODE_TRANSP:
481 if (!find_next_esco_param(conn, esco_param_msbc,
482 ARRAY_SIZE(esco_param_msbc)))
484 param = &esco_param_msbc[conn->attempt - 1];
486 case SCO_AIRMODE_CVSD:
487 if (conn->parent && lmp_esco_capable(conn->parent)) {
488 if (!find_next_esco_param(conn, esco_param_cvsd,
489 ARRAY_SIZE(esco_param_cvsd)))
491 param = &esco_param_cvsd[conn->attempt - 1];
493 if (conn->attempt > ARRAY_SIZE(sco_param_cvsd))
495 param = &sco_param_cvsd[conn->attempt - 1];
502 cp.retrans_effort = param->retrans_effort;
503 cp.pkt_type = __cpu_to_le16(param->pkt_type);
504 cp.max_latency = __cpu_to_le16(param->max_latency);
506 if (hci_send_cmd(hdev, HCI_OP_SETUP_SYNC_CONN, sizeof(cp), &cp) < 0)
512 bool hci_setup_sync(struct hci_conn *conn, __u16 handle)
515 struct conn_handle_t *conn_handle;
517 if (enhanced_sync_conn_capable(conn->hdev)) {
518 conn_handle = kzalloc(sizeof(*conn_handle), GFP_KERNEL);
523 conn_handle->conn = conn;
524 conn_handle->handle = handle;
525 result = hci_cmd_sync_queue(conn->hdev, hci_enhanced_setup_sync,
533 return hci_setup_sync_conn(conn, handle);
536 u8 hci_le_conn_update(struct hci_conn *conn, u16 min, u16 max, u16 latency,
539 struct hci_dev *hdev = conn->hdev;
540 struct hci_conn_params *params;
541 struct hci_cp_le_conn_update cp;
545 params = hci_conn_params_lookup(hdev, &conn->dst, conn->dst_type);
547 params->conn_min_interval = min;
548 params->conn_max_interval = max;
549 params->conn_latency = latency;
550 params->supervision_timeout = to_multiplier;
553 hci_dev_unlock(hdev);
555 memset(&cp, 0, sizeof(cp));
556 cp.handle = cpu_to_le16(conn->handle);
557 cp.conn_interval_min = cpu_to_le16(min);
558 cp.conn_interval_max = cpu_to_le16(max);
559 cp.conn_latency = cpu_to_le16(latency);
560 cp.supervision_timeout = cpu_to_le16(to_multiplier);
561 cp.min_ce_len = cpu_to_le16(0x0000);
562 cp.max_ce_len = cpu_to_le16(0x0000);
564 hci_send_cmd(hdev, HCI_OP_LE_CONN_UPDATE, sizeof(cp), &cp);
572 void hci_le_start_enc(struct hci_conn *conn, __le16 ediv, __le64 rand,
573 __u8 ltk[16], __u8 key_size)
575 struct hci_dev *hdev = conn->hdev;
576 struct hci_cp_le_start_enc cp;
578 BT_DBG("hcon %p", conn);
580 memset(&cp, 0, sizeof(cp));
582 cp.handle = cpu_to_le16(conn->handle);
585 memcpy(cp.ltk, ltk, key_size);
587 hci_send_cmd(hdev, HCI_OP_LE_START_ENC, sizeof(cp), &cp);
590 /* Device _must_ be locked */
591 void hci_sco_setup(struct hci_conn *conn, __u8 status)
593 struct hci_link *link;
595 link = list_first_entry_or_null(&conn->link_list, struct hci_link, list);
596 if (!link || !link->conn)
599 BT_DBG("hcon %p", conn);
602 if (lmp_esco_capable(conn->hdev))
603 hci_setup_sync(link->conn, conn->handle);
605 hci_add_sco(link->conn, conn->handle);
607 hci_connect_cfm(link->conn, status);
608 hci_conn_del(link->conn);
612 static void hci_conn_timeout(struct work_struct *work)
614 struct hci_conn *conn = container_of(work, struct hci_conn,
616 int refcnt = atomic_read(&conn->refcnt);
618 BT_DBG("hcon %p state %s", conn, state_to_string(conn->state));
622 /* FIXME: It was observed that in pairing failed scenario, refcnt
623 * drops below 0. Probably this is because l2cap_conn_del calls
624 * l2cap_chan_del for each channel, and inside l2cap_chan_del conn is
625 * dropped. After that loop hci_chan_del is called which also drops
626 * conn. For now make sure that ACL is alive if refcnt is higher then 0,
632 hci_abort_conn(conn, hci_proto_disconn_ind(conn));
635 /* Enter sniff mode */
636 static void hci_conn_idle(struct work_struct *work)
638 struct hci_conn *conn = container_of(work, struct hci_conn,
640 struct hci_dev *hdev = conn->hdev;
642 BT_DBG("hcon %p mode %d", conn, conn->mode);
644 if (!lmp_sniff_capable(hdev) || !lmp_sniff_capable(conn))
647 if (conn->mode != HCI_CM_ACTIVE || !(conn->link_policy & HCI_LP_SNIFF))
650 if (lmp_sniffsubr_capable(hdev) && lmp_sniffsubr_capable(conn)) {
651 struct hci_cp_sniff_subrate cp;
652 cp.handle = cpu_to_le16(conn->handle);
653 cp.max_latency = cpu_to_le16(0);
654 cp.min_remote_timeout = cpu_to_le16(0);
655 cp.min_local_timeout = cpu_to_le16(0);
656 hci_send_cmd(hdev, HCI_OP_SNIFF_SUBRATE, sizeof(cp), &cp);
659 if (!test_and_set_bit(HCI_CONN_MODE_CHANGE_PEND, &conn->flags)) {
660 struct hci_cp_sniff_mode cp;
661 cp.handle = cpu_to_le16(conn->handle);
662 cp.max_interval = cpu_to_le16(hdev->sniff_max_interval);
663 cp.min_interval = cpu_to_le16(hdev->sniff_min_interval);
664 cp.attempt = cpu_to_le16(4);
665 cp.timeout = cpu_to_le16(1);
666 hci_send_cmd(hdev, HCI_OP_SNIFF_MODE, sizeof(cp), &cp);
670 static void hci_conn_auto_accept(struct work_struct *work)
672 struct hci_conn *conn = container_of(work, struct hci_conn,
673 auto_accept_work.work);
675 hci_send_cmd(conn->hdev, HCI_OP_USER_CONFIRM_REPLY, sizeof(conn->dst),
679 static void le_disable_advertising(struct hci_dev *hdev)
681 if (ext_adv_capable(hdev)) {
682 struct hci_cp_le_set_ext_adv_enable cp;
685 cp.num_of_sets = 0x00;
687 hci_send_cmd(hdev, HCI_OP_LE_SET_EXT_ADV_ENABLE, sizeof(cp),
691 hci_send_cmd(hdev, HCI_OP_LE_SET_ADV_ENABLE, sizeof(enable),
696 static void le_conn_timeout(struct work_struct *work)
698 struct hci_conn *conn = container_of(work, struct hci_conn,
699 le_conn_timeout.work);
700 struct hci_dev *hdev = conn->hdev;
704 /* We could end up here due to having done directed advertising,
705 * so clean up the state if necessary. This should however only
706 * happen with broken hardware or if low duty cycle was used
707 * (which doesn't have a timeout of its own).
709 if (conn->role == HCI_ROLE_SLAVE) {
710 /* Disable LE Advertising */
711 le_disable_advertising(hdev);
713 hci_conn_failed(conn, HCI_ERROR_ADVERTISING_TIMEOUT);
714 hci_dev_unlock(hdev);
718 hci_abort_conn(conn, HCI_ERROR_REMOTE_USER_TERM);
721 struct iso_cig_params {
722 struct hci_cp_le_set_cig_params cp;
723 struct hci_cis_params cis[0x1f];
726 struct iso_list_data {
742 static void bis_list(struct hci_conn *conn, void *data)
744 struct iso_list_data *d = data;
746 /* Skip if not broadcast/ANY address */
747 if (bacmp(&conn->dst, BDADDR_ANY))
750 if (d->big != conn->iso_qos.bcast.big || d->bis == BT_ISO_QOS_BIS_UNSET ||
751 d->bis != conn->iso_qos.bcast.bis)
757 static int terminate_big_sync(struct hci_dev *hdev, void *data)
759 struct iso_list_data *d = data;
761 bt_dev_dbg(hdev, "big 0x%2.2x bis 0x%2.2x", d->big, d->bis);
763 hci_remove_ext_adv_instance_sync(hdev, d->bis, NULL);
765 /* Only terminate BIG if it has been created */
769 return hci_le_terminate_big_sync(hdev, d->big,
770 HCI_ERROR_LOCAL_HOST_TERM);
773 static void terminate_big_destroy(struct hci_dev *hdev, void *data, int err)
778 static int hci_le_terminate_big(struct hci_dev *hdev, struct hci_conn *conn)
780 struct iso_list_data *d;
783 bt_dev_dbg(hdev, "big 0x%2.2x bis 0x%2.2x", conn->iso_qos.bcast.big,
784 conn->iso_qos.bcast.bis);
786 d = kzalloc(sizeof(*d), GFP_KERNEL);
790 d->big = conn->iso_qos.bcast.big;
791 d->bis = conn->iso_qos.bcast.bis;
792 d->big_term = test_and_clear_bit(HCI_CONN_BIG_CREATED, &conn->flags);
794 ret = hci_cmd_sync_queue(hdev, terminate_big_sync, d,
795 terminate_big_destroy);
802 static int big_terminate_sync(struct hci_dev *hdev, void *data)
804 struct iso_list_data *d = data;
806 bt_dev_dbg(hdev, "big 0x%2.2x sync_handle 0x%4.4x", d->big,
809 if (d->big_sync_term)
810 hci_le_big_terminate_sync(hdev, d->big);
813 return hci_le_pa_terminate_sync(hdev, d->sync_handle);
818 static int hci_le_big_terminate(struct hci_dev *hdev, u8 big, struct hci_conn *conn)
820 struct iso_list_data *d;
823 bt_dev_dbg(hdev, "big 0x%2.2x sync_handle 0x%4.4x", big, conn->sync_handle);
825 d = kzalloc(sizeof(*d), GFP_KERNEL);
830 d->sync_handle = conn->sync_handle;
831 d->pa_sync_term = test_and_clear_bit(HCI_CONN_PA_SYNC, &conn->flags);
832 d->big_sync_term = test_and_clear_bit(HCI_CONN_BIG_SYNC, &conn->flags);
834 ret = hci_cmd_sync_queue(hdev, big_terminate_sync, d,
835 terminate_big_destroy);
842 /* Cleanup BIS connection
844 * Detects if there any BIS left connected in a BIG
845 * broadcaster: Remove advertising instance and terminate BIG.
846 * broadcaster receiver: Teminate BIG sync and terminate PA sync.
848 static void bis_cleanup(struct hci_conn *conn)
850 struct hci_dev *hdev = conn->hdev;
851 struct hci_conn *bis;
853 bt_dev_dbg(hdev, "conn %p", conn);
855 if (conn->role == HCI_ROLE_MASTER) {
856 if (!test_and_clear_bit(HCI_CONN_PER_ADV, &conn->flags))
859 /* Check if ISO connection is a BIS and terminate advertising
860 * set and BIG if there are no other connections using it.
862 bis = hci_conn_hash_lookup_big(hdev, conn->iso_qos.bcast.big);
866 hci_le_terminate_big(hdev, conn);
868 bis = hci_conn_hash_lookup_big_any_dst(hdev,
869 conn->iso_qos.bcast.big);
874 hci_le_big_terminate(hdev, conn->iso_qos.bcast.big,
879 static int remove_cig_sync(struct hci_dev *hdev, void *data)
881 u8 handle = PTR_UINT(data);
883 return hci_le_remove_cig_sync(hdev, handle);
886 static int hci_le_remove_cig(struct hci_dev *hdev, u8 handle)
888 bt_dev_dbg(hdev, "handle 0x%2.2x", handle);
890 return hci_cmd_sync_queue(hdev, remove_cig_sync, UINT_PTR(handle),
894 static void find_cis(struct hci_conn *conn, void *data)
896 struct iso_list_data *d = data;
898 /* Ignore broadcast or if CIG don't match */
899 if (!bacmp(&conn->dst, BDADDR_ANY) || d->cig != conn->iso_qos.ucast.cig)
905 /* Cleanup CIS connection:
907 * Detects if there any CIS left connected in a CIG and remove it.
909 static void cis_cleanup(struct hci_conn *conn)
911 struct hci_dev *hdev = conn->hdev;
912 struct iso_list_data d;
914 if (conn->iso_qos.ucast.cig == BT_ISO_QOS_CIG_UNSET)
917 memset(&d, 0, sizeof(d));
918 d.cig = conn->iso_qos.ucast.cig;
920 /* Check if ISO connection is a CIS and remove CIG if there are
921 * no other connections using it.
923 hci_conn_hash_list_state(hdev, find_cis, ISO_LINK, BT_BOUND, &d);
924 hci_conn_hash_list_state(hdev, find_cis, ISO_LINK, BT_CONNECT, &d);
925 hci_conn_hash_list_state(hdev, find_cis, ISO_LINK, BT_CONNECTED, &d);
929 hci_le_remove_cig(hdev, conn->iso_qos.ucast.cig);
932 static int hci_conn_hash_alloc_unset(struct hci_dev *hdev)
934 return ida_alloc_range(&hdev->unset_handle_ida, HCI_CONN_HANDLE_MAX + 1,
935 U16_MAX, GFP_ATOMIC);
938 struct hci_conn *hci_conn_add(struct hci_dev *hdev, int type, bdaddr_t *dst,
941 struct hci_conn *conn;
943 bt_dev_dbg(hdev, "dst %pMR handle 0x%4.4x", dst, handle);
945 conn = kzalloc(sizeof(*conn), GFP_KERNEL);
949 bacpy(&conn->dst, dst);
950 bacpy(&conn->src, &hdev->bdaddr);
951 conn->handle = handle;
955 conn->mode = HCI_CM_ACTIVE;
956 conn->state = BT_OPEN;
957 conn->auth_type = HCI_AT_GENERAL_BONDING;
958 conn->io_capability = hdev->io_capability;
959 conn->remote_auth = 0xff;
960 conn->key_type = 0xff;
961 conn->rssi = HCI_RSSI_INVALID;
962 conn->tx_power = HCI_TX_POWER_INVALID;
963 conn->max_tx_power = HCI_TX_POWER_INVALID;
964 conn->sync_handle = HCI_SYNC_HANDLE_INVALID;
966 set_bit(HCI_CONN_POWER_SAVE, &conn->flags);
967 conn->disc_timeout = HCI_DISCONN_TIMEOUT;
969 /* Set Default Authenticated payload timeout to 30s */
970 conn->auth_payload_timeout = DEFAULT_AUTH_PAYLOAD_TIMEOUT;
972 if (conn->role == HCI_ROLE_MASTER)
977 conn->pkt_type = hdev->pkt_type & ACL_PTYPE_MASK;
980 /* conn->src should reflect the local identity address */
981 hci_copy_identity_address(hdev, &conn->src, &conn->src_type);
984 /* conn->src should reflect the local identity address */
985 hci_copy_identity_address(hdev, &conn->src, &conn->src_type);
987 /* set proper cleanup function */
988 if (!bacmp(dst, BDADDR_ANY))
989 conn->cleanup = bis_cleanup;
990 else if (conn->role == HCI_ROLE_MASTER)
991 conn->cleanup = cis_cleanup;
995 if (lmp_esco_capable(hdev))
996 conn->pkt_type = (hdev->esco_type & SCO_ESCO_MASK) |
997 (hdev->esco_type & EDR_ESCO_MASK);
999 conn->pkt_type = hdev->pkt_type & SCO_PTYPE_MASK;
1002 conn->pkt_type = hdev->esco_type & ~EDR_ESCO_MASK;
1006 skb_queue_head_init(&conn->data_q);
1008 INIT_LIST_HEAD(&conn->chan_list);
1009 INIT_LIST_HEAD(&conn->link_list);
1011 INIT_DELAYED_WORK(&conn->disc_work, hci_conn_timeout);
1012 INIT_DELAYED_WORK(&conn->auto_accept_work, hci_conn_auto_accept);
1013 INIT_DELAYED_WORK(&conn->idle_work, hci_conn_idle);
1014 INIT_DELAYED_WORK(&conn->le_conn_timeout, le_conn_timeout);
1016 atomic_set(&conn->refcnt, 0);
1020 hci_conn_hash_add(hdev, conn);
1022 /* The SCO and eSCO connections will only be notified when their
1023 * setup has been completed. This is different to ACL links which
1024 * can be notified right away.
1026 if (conn->type != SCO_LINK && conn->type != ESCO_LINK) {
1028 hdev->notify(hdev, HCI_NOTIFY_CONN_ADD);
1031 hci_conn_init_sysfs(conn);
1036 struct hci_conn *hci_conn_add_unset(struct hci_dev *hdev, int type,
1037 bdaddr_t *dst, u8 role)
1041 bt_dev_dbg(hdev, "dst %pMR", dst);
1043 handle = hci_conn_hash_alloc_unset(hdev);
1044 if (unlikely(handle < 0))
1047 return hci_conn_add(hdev, type, dst, role, handle);
1050 static void hci_conn_cleanup_child(struct hci_conn *conn, u8 reason)
1053 reason = HCI_ERROR_REMOTE_USER_TERM;
1055 /* Due to race, SCO/ISO conn might be not established yet at this point,
1056 * and nothing else will clean it up. In other cases it is done via HCI
1059 switch (conn->type) {
1062 if (HCI_CONN_HANDLE_UNSET(conn->handle))
1063 hci_conn_failed(conn, reason);
1066 if (conn->state != BT_CONNECTED &&
1067 !test_bit(HCI_CONN_CREATE_CIS, &conn->flags))
1068 hci_conn_failed(conn, reason);
1073 static void hci_conn_unlink(struct hci_conn *conn)
1075 struct hci_dev *hdev = conn->hdev;
1077 bt_dev_dbg(hdev, "hcon %p", conn);
1079 if (!conn->parent) {
1080 struct hci_link *link, *t;
1082 list_for_each_entry_safe(link, t, &conn->link_list, list) {
1083 struct hci_conn *child = link->conn;
1085 hci_conn_unlink(child);
1087 /* If hdev is down it means
1088 * hci_dev_close_sync/hci_conn_hash_flush is in progress
1089 * and links don't need to be cleanup as all connections
1092 if (!test_bit(HCI_UP, &hdev->flags))
1095 hci_conn_cleanup_child(child, conn->abort_reason);
1104 list_del_rcu(&conn->link->list);
1107 hci_conn_drop(conn->parent);
1108 hci_conn_put(conn->parent);
1109 conn->parent = NULL;
1115 void hci_conn_del(struct hci_conn *conn)
1117 struct hci_dev *hdev = conn->hdev;
1119 BT_DBG("%s hcon %p handle %d", hdev->name, conn, conn->handle);
1121 hci_conn_unlink(conn);
1123 cancel_delayed_work_sync(&conn->disc_work);
1124 cancel_delayed_work_sync(&conn->auto_accept_work);
1125 cancel_delayed_work_sync(&conn->idle_work);
1127 if (conn->type == ACL_LINK) {
1128 /* Unacked frames */
1129 hdev->acl_cnt += conn->sent;
1130 } else if (conn->type == LE_LINK) {
1131 cancel_delayed_work(&conn->le_conn_timeout);
1134 hdev->le_cnt += conn->sent;
1136 hdev->acl_cnt += conn->sent;
1138 /* Unacked ISO frames */
1139 if (conn->type == ISO_LINK) {
1141 hdev->iso_cnt += conn->sent;
1142 else if (hdev->le_pkts)
1143 hdev->le_cnt += conn->sent;
1145 hdev->acl_cnt += conn->sent;
1150 amp_mgr_put(conn->amp_mgr);
1152 skb_queue_purge(&conn->data_q);
1154 /* Remove the connection from the list and cleanup its remaining
1155 * state. This is a separate function since for some cases like
1156 * BT_CONNECT_SCAN we *only* want the cleanup part without the
1157 * rest of hci_conn_del.
1159 hci_conn_cleanup(conn);
1162 struct hci_dev *hci_get_route(bdaddr_t *dst, bdaddr_t *src, uint8_t src_type)
1164 int use_src = bacmp(src, BDADDR_ANY);
1165 struct hci_dev *hdev = NULL, *d;
1167 BT_DBG("%pMR -> %pMR", src, dst);
1169 read_lock(&hci_dev_list_lock);
1171 list_for_each_entry(d, &hci_dev_list, list) {
1172 if (!test_bit(HCI_UP, &d->flags) ||
1173 hci_dev_test_flag(d, HCI_USER_CHANNEL) ||
1174 d->dev_type != HCI_PRIMARY)
1178 * No source address - find interface with bdaddr != dst
1179 * Source address - find interface with bdaddr == src
1186 if (src_type == BDADDR_BREDR) {
1187 if (!lmp_bredr_capable(d))
1189 bacpy(&id_addr, &d->bdaddr);
1190 id_addr_type = BDADDR_BREDR;
1192 if (!lmp_le_capable(d))
1195 hci_copy_identity_address(d, &id_addr,
1198 /* Convert from HCI to three-value type */
1199 if (id_addr_type == ADDR_LE_DEV_PUBLIC)
1200 id_addr_type = BDADDR_LE_PUBLIC;
1202 id_addr_type = BDADDR_LE_RANDOM;
1205 if (!bacmp(&id_addr, src) && id_addr_type == src_type) {
1209 if (bacmp(&d->bdaddr, dst)) {
1216 hdev = hci_dev_hold(hdev);
1218 read_unlock(&hci_dev_list_lock);
1221 EXPORT_SYMBOL(hci_get_route);
1223 /* This function requires the caller holds hdev->lock */
1224 static void hci_le_conn_failed(struct hci_conn *conn, u8 status)
1226 struct hci_dev *hdev = conn->hdev;
1228 hci_connect_le_scan_cleanup(conn, status);
1230 /* Enable advertising in case this was a failed connection
1231 * attempt as a peripheral.
1233 hci_enable_advertising(hdev);
1236 /* This function requires the caller holds hdev->lock */
1237 void hci_conn_failed(struct hci_conn *conn, u8 status)
1239 struct hci_dev *hdev = conn->hdev;
1241 bt_dev_dbg(hdev, "status 0x%2.2x", status);
1243 switch (conn->type) {
1245 hci_le_conn_failed(conn, status);
1248 mgmt_connect_failed(hdev, &conn->dst, conn->type,
1249 conn->dst_type, status);
1253 conn->state = BT_CLOSED;
1254 hci_connect_cfm(conn, status);
1258 /* This function requires the caller holds hdev->lock */
1259 u8 hci_conn_set_handle(struct hci_conn *conn, u16 handle)
1261 struct hci_dev *hdev = conn->hdev;
1263 bt_dev_dbg(hdev, "hcon %p handle 0x%4.4x", conn, handle);
1265 if (conn->handle == handle)
1268 if (handle > HCI_CONN_HANDLE_MAX) {
1269 bt_dev_err(hdev, "Invalid handle: 0x%4.4x > 0x%4.4x",
1270 handle, HCI_CONN_HANDLE_MAX);
1271 return HCI_ERROR_INVALID_PARAMETERS;
1274 /* If abort_reason has been sent it means the connection is being
1275 * aborted and the handle shall not be changed.
1277 if (conn->abort_reason)
1278 return conn->abort_reason;
1280 if (HCI_CONN_HANDLE_UNSET(conn->handle))
1281 ida_free(&hdev->unset_handle_ida, conn->handle);
1283 conn->handle = handle;
1288 static void create_le_conn_complete(struct hci_dev *hdev, void *data, int err)
1290 struct hci_conn *conn;
1291 u16 handle = PTR_UINT(data);
1293 conn = hci_conn_hash_lookup_handle(hdev, handle);
1297 bt_dev_dbg(hdev, "err %d", err);
1302 hci_connect_le_scan_cleanup(conn, 0x00);
1306 /* Check if connection is still pending */
1307 if (conn != hci_lookup_le_connect(hdev))
1310 /* Flush to make sure we send create conn cancel command if needed */
1311 flush_delayed_work(&conn->le_conn_timeout);
1312 hci_conn_failed(conn, bt_status(err));
1315 hci_dev_unlock(hdev);
1318 static int hci_connect_le_sync(struct hci_dev *hdev, void *data)
1320 struct hci_conn *conn;
1321 u16 handle = PTR_UINT(data);
1323 conn = hci_conn_hash_lookup_handle(hdev, handle);
1327 bt_dev_dbg(hdev, "conn %p", conn);
1329 clear_bit(HCI_CONN_SCANNING, &conn->flags);
1330 conn->state = BT_CONNECT;
1332 return hci_le_create_conn_sync(hdev, conn);
1335 struct hci_conn *hci_connect_le(struct hci_dev *hdev, bdaddr_t *dst,
1336 u8 dst_type, bool dst_resolved, u8 sec_level,
1337 u16 conn_timeout, u8 role)
1339 struct hci_conn *conn;
1340 struct smp_irk *irk;
1343 /* Let's make sure that le is enabled.*/
1344 if (!hci_dev_test_flag(hdev, HCI_LE_ENABLED)) {
1345 if (lmp_le_capable(hdev))
1346 return ERR_PTR(-ECONNREFUSED);
1348 return ERR_PTR(-EOPNOTSUPP);
1351 /* Since the controller supports only one LE connection attempt at a
1352 * time, we return -EBUSY if there is any connection attempt running.
1354 if (hci_lookup_le_connect(hdev))
1355 return ERR_PTR(-EBUSY);
1357 /* If there's already a connection object but it's not in
1358 * scanning state it means it must already be established, in
1359 * which case we can't do anything else except report a failure
1362 conn = hci_conn_hash_lookup_le(hdev, dst, dst_type);
1363 if (conn && !test_bit(HCI_CONN_SCANNING, &conn->flags)) {
1364 return ERR_PTR(-EBUSY);
1367 /* Check if the destination address has been resolved by the controller
1368 * since if it did then the identity address shall be used.
1370 if (!dst_resolved) {
1371 /* When given an identity address with existing identity
1372 * resolving key, the connection needs to be established
1373 * to a resolvable random address.
1375 * Storing the resolvable random address is required here
1376 * to handle connection failures. The address will later
1377 * be resolved back into the original identity address
1378 * from the connect request.
1380 irk = hci_find_irk_by_addr(hdev, dst, dst_type);
1381 if (irk && bacmp(&irk->rpa, BDADDR_ANY)) {
1383 dst_type = ADDR_LE_DEV_RANDOM;
1388 bacpy(&conn->dst, dst);
1390 conn = hci_conn_add_unset(hdev, LE_LINK, dst, role);
1392 return ERR_PTR(-ENOMEM);
1393 hci_conn_hold(conn);
1394 conn->pending_sec_level = sec_level;
1397 conn->dst_type = dst_type;
1398 conn->sec_level = BT_SECURITY_LOW;
1399 conn->conn_timeout = conn_timeout;
1401 err = hci_cmd_sync_queue(hdev, hci_connect_le_sync,
1402 UINT_PTR(conn->handle),
1403 create_le_conn_complete);
1406 return ERR_PTR(err);
1412 static bool is_connected(struct hci_dev *hdev, bdaddr_t *addr, u8 type)
1414 struct hci_conn *conn;
1416 conn = hci_conn_hash_lookup_le(hdev, addr, type);
1420 if (conn->state != BT_CONNECTED)
1426 /* This function requires the caller holds hdev->lock */
1427 static int hci_explicit_conn_params_set(struct hci_dev *hdev,
1428 bdaddr_t *addr, u8 addr_type)
1430 struct hci_conn_params *params;
1432 if (is_connected(hdev, addr, addr_type))
1435 params = hci_conn_params_lookup(hdev, addr, addr_type);
1437 params = hci_conn_params_add(hdev, addr, addr_type);
1441 /* If we created new params, mark them to be deleted in
1442 * hci_connect_le_scan_cleanup. It's different case than
1443 * existing disabled params, those will stay after cleanup.
1445 params->auto_connect = HCI_AUTO_CONN_EXPLICIT;
1448 /* We're trying to connect, so make sure params are at pend_le_conns */
1449 if (params->auto_connect == HCI_AUTO_CONN_DISABLED ||
1450 params->auto_connect == HCI_AUTO_CONN_REPORT ||
1451 params->auto_connect == HCI_AUTO_CONN_EXPLICIT) {
1452 hci_pend_le_list_del_init(params);
1453 hci_pend_le_list_add(params, &hdev->pend_le_conns);
1456 params->explicit_connect = true;
1458 BT_DBG("addr %pMR (type %u) auto_connect %u", addr, addr_type,
1459 params->auto_connect);
1464 static int qos_set_big(struct hci_dev *hdev, struct bt_iso_qos *qos)
1466 struct hci_conn *conn;
1469 /* Allocate a BIG if not set */
1470 if (qos->bcast.big == BT_ISO_QOS_BIG_UNSET) {
1471 for (big = 0x00; big < 0xef; big++) {
1473 conn = hci_conn_hash_lookup_big(hdev, big);
1479 return -EADDRNOTAVAIL;
1482 qos->bcast.big = big;
1488 static int qos_set_bis(struct hci_dev *hdev, struct bt_iso_qos *qos)
1490 struct hci_conn *conn;
1493 /* Allocate BIS if not set */
1494 if (qos->bcast.bis == BT_ISO_QOS_BIS_UNSET) {
1495 /* Find an unused adv set to advertise BIS, skip instance 0x00
1496 * since it is reserved as general purpose set.
1498 for (bis = 0x01; bis < hdev->le_num_of_adv_sets;
1501 conn = hci_conn_hash_lookup_bis(hdev, BDADDR_ANY, bis);
1506 if (bis == hdev->le_num_of_adv_sets)
1507 return -EADDRNOTAVAIL;
1510 qos->bcast.bis = bis;
1516 /* This function requires the caller holds hdev->lock */
1517 static struct hci_conn *hci_add_bis(struct hci_dev *hdev, bdaddr_t *dst,
1518 struct bt_iso_qos *qos, __u8 base_len,
1521 struct hci_conn *conn;
1524 /* Let's make sure that le is enabled.*/
1525 if (!hci_dev_test_flag(hdev, HCI_LE_ENABLED)) {
1526 if (lmp_le_capable(hdev))
1527 return ERR_PTR(-ECONNREFUSED);
1528 return ERR_PTR(-EOPNOTSUPP);
1531 err = qos_set_big(hdev, qos);
1533 return ERR_PTR(err);
1535 err = qos_set_bis(hdev, qos);
1537 return ERR_PTR(err);
1539 /* Check if the LE Create BIG command has already been sent */
1540 conn = hci_conn_hash_lookup_per_adv_bis(hdev, dst, qos->bcast.big,
1543 return ERR_PTR(-EADDRINUSE);
1545 /* Check BIS settings against other bound BISes, since all
1546 * BISes in a BIG must have the same value for all parameters
1548 conn = hci_conn_hash_lookup_big(hdev, qos->bcast.big);
1550 if (conn && (memcmp(qos, &conn->iso_qos, sizeof(*qos)) ||
1551 base_len != conn->le_per_adv_data_len ||
1552 memcmp(conn->le_per_adv_data, base, base_len)))
1553 return ERR_PTR(-EADDRINUSE);
1555 conn = hci_conn_add_unset(hdev, ISO_LINK, dst, HCI_ROLE_MASTER);
1557 return ERR_PTR(-ENOMEM);
1559 conn->state = BT_CONNECT;
1561 hci_conn_hold(conn);
1565 /* This function requires the caller holds hdev->lock */
1566 struct hci_conn *hci_connect_le_scan(struct hci_dev *hdev, bdaddr_t *dst,
1567 u8 dst_type, u8 sec_level,
1569 enum conn_reasons conn_reason)
1571 struct hci_conn *conn;
1573 /* Let's make sure that le is enabled.*/
1574 if (!hci_dev_test_flag(hdev, HCI_LE_ENABLED)) {
1575 if (lmp_le_capable(hdev))
1576 return ERR_PTR(-ECONNREFUSED);
1578 return ERR_PTR(-EOPNOTSUPP);
1581 /* Some devices send ATT messages as soon as the physical link is
1582 * established. To be able to handle these ATT messages, the user-
1583 * space first establishes the connection and then starts the pairing
1586 * So if a hci_conn object already exists for the following connection
1587 * attempt, we simply update pending_sec_level and auth_type fields
1588 * and return the object found.
1590 conn = hci_conn_hash_lookup_le(hdev, dst, dst_type);
1592 if (conn->pending_sec_level < sec_level)
1593 conn->pending_sec_level = sec_level;
1597 BT_DBG("requesting refresh of dst_addr");
1599 conn = hci_conn_add_unset(hdev, LE_LINK, dst, HCI_ROLE_MASTER);
1601 return ERR_PTR(-ENOMEM);
1603 if (hci_explicit_conn_params_set(hdev, dst, dst_type) < 0) {
1605 return ERR_PTR(-EBUSY);
1608 conn->state = BT_CONNECT;
1609 set_bit(HCI_CONN_SCANNING, &conn->flags);
1610 conn->dst_type = dst_type;
1611 conn->sec_level = BT_SECURITY_LOW;
1612 conn->pending_sec_level = sec_level;
1613 conn->conn_timeout = conn_timeout;
1614 conn->conn_reason = conn_reason;
1616 hci_update_passive_scan(hdev);
1619 hci_conn_hold(conn);
1623 struct hci_conn *hci_connect_acl(struct hci_dev *hdev, bdaddr_t *dst,
1624 u8 sec_level, u8 auth_type,
1625 enum conn_reasons conn_reason)
1627 struct hci_conn *acl;
1629 if (!hci_dev_test_flag(hdev, HCI_BREDR_ENABLED)) {
1630 if (lmp_bredr_capable(hdev))
1631 return ERR_PTR(-ECONNREFUSED);
1633 return ERR_PTR(-EOPNOTSUPP);
1636 /* Reject outgoing connection to device with same BD ADDR against
1639 if (!bacmp(&hdev->bdaddr, dst)) {
1640 bt_dev_dbg(hdev, "Reject connection with same BD_ADDR %pMR\n",
1642 return ERR_PTR(-ECONNREFUSED);
1645 acl = hci_conn_hash_lookup_ba(hdev, ACL_LINK, dst);
1647 acl = hci_conn_add_unset(hdev, ACL_LINK, dst, HCI_ROLE_MASTER);
1649 return ERR_PTR(-ENOMEM);
1654 acl->conn_reason = conn_reason;
1655 if (acl->state == BT_OPEN || acl->state == BT_CLOSED) {
1656 acl->sec_level = BT_SECURITY_LOW;
1657 acl->pending_sec_level = sec_level;
1658 acl->auth_type = auth_type;
1659 hci_acl_create_connection(acl);
1665 static struct hci_link *hci_conn_link(struct hci_conn *parent,
1666 struct hci_conn *conn)
1668 struct hci_dev *hdev = parent->hdev;
1669 struct hci_link *link;
1671 bt_dev_dbg(hdev, "parent %p hcon %p", parent, conn);
1679 link = kzalloc(sizeof(*link), GFP_KERNEL);
1683 link->conn = hci_conn_hold(conn);
1685 conn->parent = hci_conn_get(parent);
1687 /* Use list_add_tail_rcu append to the list */
1688 list_add_tail_rcu(&link->list, &parent->link_list);
1693 struct hci_conn *hci_connect_sco(struct hci_dev *hdev, int type, bdaddr_t *dst,
1694 __u16 setting, struct bt_codec *codec)
1696 struct hci_conn *acl;
1697 struct hci_conn *sco;
1698 struct hci_link *link;
1700 acl = hci_connect_acl(hdev, dst, BT_SECURITY_LOW, HCI_AT_NO_BONDING,
1701 CONN_REASON_SCO_CONNECT);
1705 sco = hci_conn_hash_lookup_ba(hdev, type, dst);
1707 sco = hci_conn_add_unset(hdev, type, dst, HCI_ROLE_MASTER);
1710 return ERR_PTR(-ENOMEM);
1714 link = hci_conn_link(acl, sco);
1718 return ERR_PTR(-ENOLINK);
1721 sco->setting = setting;
1722 sco->codec = *codec;
1724 if (acl->state == BT_CONNECTED &&
1725 (sco->state == BT_OPEN || sco->state == BT_CLOSED)) {
1726 set_bit(HCI_CONN_POWER_SAVE, &acl->flags);
1727 hci_conn_enter_active_mode(acl, BT_POWER_FORCE_ACTIVE_ON);
1729 if (test_bit(HCI_CONN_MODE_CHANGE_PEND, &acl->flags)) {
1730 /* defer SCO setup until mode change completed */
1731 set_bit(HCI_CONN_SCO_SETUP_PEND, &acl->flags);
1735 hci_sco_setup(acl, 0x00);
1741 static int hci_le_create_big(struct hci_conn *conn, struct bt_iso_qos *qos)
1743 struct hci_dev *hdev = conn->hdev;
1744 struct hci_cp_le_create_big cp;
1745 struct iso_list_data data;
1747 memset(&cp, 0, sizeof(cp));
1749 data.big = qos->bcast.big;
1750 data.bis = qos->bcast.bis;
1753 /* Create a BIS for each bound connection */
1754 hci_conn_hash_list_state(hdev, bis_list, ISO_LINK,
1757 cp.handle = qos->bcast.big;
1758 cp.adv_handle = qos->bcast.bis;
1759 cp.num_bis = data.count;
1760 hci_cpu_to_le24(qos->bcast.out.interval, cp.bis.sdu_interval);
1761 cp.bis.sdu = cpu_to_le16(qos->bcast.out.sdu);
1762 cp.bis.latency = cpu_to_le16(qos->bcast.out.latency);
1763 cp.bis.rtn = qos->bcast.out.rtn;
1764 cp.bis.phy = qos->bcast.out.phy;
1765 cp.bis.packing = qos->bcast.packing;
1766 cp.bis.framing = qos->bcast.framing;
1767 cp.bis.encryption = qos->bcast.encryption;
1768 memcpy(cp.bis.bcode, qos->bcast.bcode, sizeof(cp.bis.bcode));
1770 return hci_send_cmd(hdev, HCI_OP_LE_CREATE_BIG, sizeof(cp), &cp);
1773 static int set_cig_params_sync(struct hci_dev *hdev, void *data)
1775 u8 cig_id = PTR_UINT(data);
1776 struct hci_conn *conn;
1777 struct bt_iso_qos *qos;
1778 struct iso_cig_params pdu;
1781 conn = hci_conn_hash_lookup_cig(hdev, cig_id);
1785 memset(&pdu, 0, sizeof(pdu));
1787 qos = &conn->iso_qos;
1788 pdu.cp.cig_id = cig_id;
1789 hci_cpu_to_le24(qos->ucast.out.interval, pdu.cp.c_interval);
1790 hci_cpu_to_le24(qos->ucast.in.interval, pdu.cp.p_interval);
1791 pdu.cp.sca = qos->ucast.sca;
1792 pdu.cp.packing = qos->ucast.packing;
1793 pdu.cp.framing = qos->ucast.framing;
1794 pdu.cp.c_latency = cpu_to_le16(qos->ucast.out.latency);
1795 pdu.cp.p_latency = cpu_to_le16(qos->ucast.in.latency);
1797 /* Reprogram all CIS(s) with the same CIG, valid range are:
1798 * num_cis: 0x00 to 0x1F
1799 * cis_id: 0x00 to 0xEF
1801 for (cis_id = 0x00; cis_id < 0xf0 &&
1802 pdu.cp.num_cis < ARRAY_SIZE(pdu.cis); cis_id++) {
1803 struct hci_cis_params *cis;
1805 conn = hci_conn_hash_lookup_cis(hdev, NULL, 0, cig_id, cis_id);
1809 qos = &conn->iso_qos;
1811 cis = &pdu.cis[pdu.cp.num_cis++];
1812 cis->cis_id = cis_id;
1813 cis->c_sdu = cpu_to_le16(conn->iso_qos.ucast.out.sdu);
1814 cis->p_sdu = cpu_to_le16(conn->iso_qos.ucast.in.sdu);
1815 cis->c_phy = qos->ucast.out.phy ? qos->ucast.out.phy :
1817 cis->p_phy = qos->ucast.in.phy ? qos->ucast.in.phy :
1819 cis->c_rtn = qos->ucast.out.rtn;
1820 cis->p_rtn = qos->ucast.in.rtn;
1823 if (!pdu.cp.num_cis)
1826 return __hci_cmd_sync_status(hdev, HCI_OP_LE_SET_CIG_PARAMS,
1828 pdu.cp.num_cis * sizeof(pdu.cis[0]), &pdu,
1832 static bool hci_le_set_cig_params(struct hci_conn *conn, struct bt_iso_qos *qos)
1834 struct hci_dev *hdev = conn->hdev;
1835 struct iso_list_data data;
1837 memset(&data, 0, sizeof(data));
1839 /* Allocate first still reconfigurable CIG if not set */
1840 if (qos->ucast.cig == BT_ISO_QOS_CIG_UNSET) {
1841 for (data.cig = 0x00; data.cig < 0xf0; data.cig++) {
1844 hci_conn_hash_list_state(hdev, find_cis, ISO_LINK,
1849 hci_conn_hash_list_state(hdev, find_cis, ISO_LINK,
1850 BT_CONNECTED, &data);
1855 if (data.cig == 0xf0)
1859 qos->ucast.cig = data.cig;
1862 if (qos->ucast.cis != BT_ISO_QOS_CIS_UNSET) {
1863 if (hci_conn_hash_lookup_cis(hdev, NULL, 0, qos->ucast.cig,
1869 /* Allocate first available CIS if not set */
1870 for (data.cig = qos->ucast.cig, data.cis = 0x00; data.cis < 0xf0;
1872 if (!hci_conn_hash_lookup_cis(hdev, NULL, 0, data.cig,
1875 qos->ucast.cis = data.cis;
1880 if (qos->ucast.cis == BT_ISO_QOS_CIS_UNSET)
1884 if (hci_cmd_sync_queue(hdev, set_cig_params_sync,
1885 UINT_PTR(qos->ucast.cig), NULL) < 0)
1891 struct hci_conn *hci_bind_cis(struct hci_dev *hdev, bdaddr_t *dst,
1892 __u8 dst_type, struct bt_iso_qos *qos)
1894 struct hci_conn *cis;
1896 cis = hci_conn_hash_lookup_cis(hdev, dst, dst_type, qos->ucast.cig,
1899 cis = hci_conn_add_unset(hdev, ISO_LINK, dst, HCI_ROLE_MASTER);
1901 return ERR_PTR(-ENOMEM);
1902 cis->cleanup = cis_cleanup;
1903 cis->dst_type = dst_type;
1904 cis->iso_qos.ucast.cig = BT_ISO_QOS_CIG_UNSET;
1905 cis->iso_qos.ucast.cis = BT_ISO_QOS_CIS_UNSET;
1908 if (cis->state == BT_CONNECTED)
1911 /* Check if CIS has been set and the settings matches */
1912 if (cis->state == BT_BOUND &&
1913 !memcmp(&cis->iso_qos, qos, sizeof(*qos)))
1916 /* Update LINK PHYs according to QoS preference */
1917 cis->le_tx_phy = qos->ucast.out.phy;
1918 cis->le_rx_phy = qos->ucast.in.phy;
1920 /* If output interval is not set use the input interval as it cannot be
1923 if (!qos->ucast.out.interval)
1924 qos->ucast.out.interval = qos->ucast.in.interval;
1926 /* If input interval is not set use the output interval as it cannot be
1929 if (!qos->ucast.in.interval)
1930 qos->ucast.in.interval = qos->ucast.out.interval;
1932 /* If output latency is not set use the input latency as it cannot be
1935 if (!qos->ucast.out.latency)
1936 qos->ucast.out.latency = qos->ucast.in.latency;
1938 /* If input latency is not set use the output latency as it cannot be
1941 if (!qos->ucast.in.latency)
1942 qos->ucast.in.latency = qos->ucast.out.latency;
1944 if (!hci_le_set_cig_params(cis, qos)) {
1946 return ERR_PTR(-EINVAL);
1951 cis->iso_qos = *qos;
1952 cis->state = BT_BOUND;
1957 bool hci_iso_setup_path(struct hci_conn *conn)
1959 struct hci_dev *hdev = conn->hdev;
1960 struct hci_cp_le_setup_iso_path cmd;
1962 memset(&cmd, 0, sizeof(cmd));
1964 if (conn->iso_qos.ucast.out.sdu) {
1965 cmd.handle = cpu_to_le16(conn->handle);
1966 cmd.direction = 0x00; /* Input (Host to Controller) */
1967 cmd.path = 0x00; /* HCI path if enabled */
1968 cmd.codec = 0x03; /* Transparent Data */
1970 if (hci_send_cmd(hdev, HCI_OP_LE_SETUP_ISO_PATH, sizeof(cmd),
1975 if (conn->iso_qos.ucast.in.sdu) {
1976 cmd.handle = cpu_to_le16(conn->handle);
1977 cmd.direction = 0x01; /* Output (Controller to Host) */
1978 cmd.path = 0x00; /* HCI path if enabled */
1979 cmd.codec = 0x03; /* Transparent Data */
1981 if (hci_send_cmd(hdev, HCI_OP_LE_SETUP_ISO_PATH, sizeof(cmd),
1989 int hci_conn_check_create_cis(struct hci_conn *conn)
1991 if (conn->type != ISO_LINK || !bacmp(&conn->dst, BDADDR_ANY))
1994 if (!conn->parent || conn->parent->state != BT_CONNECTED ||
1995 conn->state != BT_CONNECT || HCI_CONN_HANDLE_UNSET(conn->handle))
2001 static int hci_create_cis_sync(struct hci_dev *hdev, void *data)
2003 return hci_le_create_cis_sync(hdev);
2006 int hci_le_create_cis_pending(struct hci_dev *hdev)
2008 struct hci_conn *conn;
2009 bool pending = false;
2013 list_for_each_entry_rcu(conn, &hdev->conn_hash.list, list) {
2014 if (test_bit(HCI_CONN_CREATE_CIS, &conn->flags)) {
2019 if (!hci_conn_check_create_cis(conn))
2028 /* Queue Create CIS */
2029 return hci_cmd_sync_queue(hdev, hci_create_cis_sync, NULL, NULL);
2032 static void hci_iso_qos_setup(struct hci_dev *hdev, struct hci_conn *conn,
2033 struct bt_iso_io_qos *qos, __u8 phy)
2035 /* Only set MTU if PHY is enabled */
2036 if (!qos->sdu && qos->phy) {
2037 if (hdev->iso_mtu > 0)
2038 qos->sdu = hdev->iso_mtu;
2039 else if (hdev->le_mtu > 0)
2040 qos->sdu = hdev->le_mtu;
2042 qos->sdu = hdev->acl_mtu;
2045 /* Use the same PHY as ACL if set to any */
2046 if (qos->phy == BT_ISO_PHY_ANY)
2049 /* Use LE ACL connection interval if not set */
2051 /* ACL interval unit in 1.25 ms to us */
2052 qos->interval = conn->le_conn_interval * 1250;
2054 /* Use LE ACL connection latency if not set */
2056 qos->latency = conn->le_conn_latency;
2059 static int create_big_sync(struct hci_dev *hdev, void *data)
2061 struct hci_conn *conn = data;
2062 struct bt_iso_qos *qos = &conn->iso_qos;
2063 u16 interval, sync_interval = 0;
2067 if (qos->bcast.out.phy == 0x02)
2068 flags |= MGMT_ADV_FLAG_SEC_2M;
2070 /* Align intervals */
2071 interval = (qos->bcast.out.interval / 1250) * qos->bcast.sync_factor;
2074 sync_interval = interval * 4;
2076 err = hci_start_per_adv_sync(hdev, qos->bcast.bis, conn->le_per_adv_data_len,
2077 conn->le_per_adv_data, flags, interval,
2078 interval, sync_interval);
2082 return hci_le_create_big(conn, &conn->iso_qos);
2085 static void create_pa_complete(struct hci_dev *hdev, void *data, int err)
2087 struct hci_cp_le_pa_create_sync *cp = data;
2089 bt_dev_dbg(hdev, "");
2092 bt_dev_err(hdev, "Unable to create PA: %d", err);
2097 static int create_pa_sync(struct hci_dev *hdev, void *data)
2099 struct hci_cp_le_pa_create_sync *cp = data;
2102 err = __hci_cmd_sync_status(hdev, HCI_OP_LE_PA_CREATE_SYNC,
2103 sizeof(*cp), cp, HCI_CMD_TIMEOUT);
2105 hci_dev_clear_flag(hdev, HCI_PA_SYNC);
2109 return hci_update_passive_scan_sync(hdev);
2112 int hci_pa_create_sync(struct hci_dev *hdev, bdaddr_t *dst, __u8 dst_type,
2113 __u8 sid, struct bt_iso_qos *qos)
2115 struct hci_cp_le_pa_create_sync *cp;
2117 if (hci_dev_test_and_set_flag(hdev, HCI_PA_SYNC))
2120 cp = kzalloc(sizeof(*cp), GFP_KERNEL);
2122 hci_dev_clear_flag(hdev, HCI_PA_SYNC);
2126 cp->options = qos->bcast.options;
2128 cp->addr_type = dst_type;
2129 bacpy(&cp->addr, dst);
2130 cp->skip = cpu_to_le16(qos->bcast.skip);
2131 cp->sync_timeout = cpu_to_le16(qos->bcast.sync_timeout);
2132 cp->sync_cte_type = qos->bcast.sync_cte_type;
2134 /* Queue start pa_create_sync and scan */
2135 return hci_cmd_sync_queue(hdev, create_pa_sync, cp, create_pa_complete);
2138 int hci_le_big_create_sync(struct hci_dev *hdev, struct hci_conn *hcon,
2139 struct bt_iso_qos *qos,
2140 __u16 sync_handle, __u8 num_bis, __u8 bis[])
2143 struct hci_cp_le_big_create_sync cp;
2148 if (num_bis > sizeof(pdu.bis))
2151 err = qos_set_big(hdev, qos);
2156 hcon->iso_qos.bcast.big = qos->bcast.big;
2158 memset(&pdu, 0, sizeof(pdu));
2159 pdu.cp.handle = qos->bcast.big;
2160 pdu.cp.sync_handle = cpu_to_le16(sync_handle);
2161 pdu.cp.encryption = qos->bcast.encryption;
2162 memcpy(pdu.cp.bcode, qos->bcast.bcode, sizeof(pdu.cp.bcode));
2163 pdu.cp.mse = qos->bcast.mse;
2164 pdu.cp.timeout = cpu_to_le16(qos->bcast.timeout);
2165 pdu.cp.num_bis = num_bis;
2166 memcpy(pdu.bis, bis, num_bis);
2168 return hci_send_cmd(hdev, HCI_OP_LE_BIG_CREATE_SYNC,
2169 sizeof(pdu.cp) + num_bis, &pdu);
2172 static void create_big_complete(struct hci_dev *hdev, void *data, int err)
2174 struct hci_conn *conn = data;
2176 bt_dev_dbg(hdev, "conn %p", conn);
2179 bt_dev_err(hdev, "Unable to create BIG: %d", err);
2180 hci_connect_cfm(conn, err);
2185 struct hci_conn *hci_bind_bis(struct hci_dev *hdev, bdaddr_t *dst,
2186 struct bt_iso_qos *qos,
2187 __u8 base_len, __u8 *base)
2189 struct hci_conn *conn;
2190 __u8 eir[HCI_MAX_PER_AD_LENGTH];
2192 if (base_len && base)
2193 base_len = eir_append_service_data(eir, 0, 0x1851,
2196 /* We need hci_conn object using the BDADDR_ANY as dst */
2197 conn = hci_add_bis(hdev, dst, qos, base_len, eir);
2201 /* Update LINK PHYs according to QoS preference */
2202 conn->le_tx_phy = qos->bcast.out.phy;
2203 conn->le_tx_phy = qos->bcast.out.phy;
2205 /* Add Basic Announcement into Peridic Adv Data if BASE is set */
2206 if (base_len && base) {
2207 memcpy(conn->le_per_adv_data, eir, sizeof(eir));
2208 conn->le_per_adv_data_len = base_len;
2211 hci_iso_qos_setup(hdev, conn, &qos->bcast.out,
2212 conn->le_tx_phy ? conn->le_tx_phy :
2213 hdev->le_tx_def_phys);
2215 conn->iso_qos = *qos;
2216 conn->state = BT_BOUND;
2221 static void bis_mark_per_adv(struct hci_conn *conn, void *data)
2223 struct iso_list_data *d = data;
2225 /* Skip if not broadcast/ANY address */
2226 if (bacmp(&conn->dst, BDADDR_ANY))
2229 if (d->big != conn->iso_qos.bcast.big ||
2230 d->bis == BT_ISO_QOS_BIS_UNSET ||
2231 d->bis != conn->iso_qos.bcast.bis)
2234 set_bit(HCI_CONN_PER_ADV, &conn->flags);
2237 struct hci_conn *hci_connect_bis(struct hci_dev *hdev, bdaddr_t *dst,
2238 __u8 dst_type, struct bt_iso_qos *qos,
2239 __u8 base_len, __u8 *base)
2241 struct hci_conn *conn;
2243 struct iso_list_data data;
2245 conn = hci_bind_bis(hdev, dst, qos, base_len, base);
2249 data.big = qos->bcast.big;
2250 data.bis = qos->bcast.bis;
2252 /* Set HCI_CONN_PER_ADV for all bound connections, to mark that
2253 * the start periodic advertising and create BIG commands have
2256 hci_conn_hash_list_state(hdev, bis_mark_per_adv, ISO_LINK,
2259 /* Queue start periodic advertising and create BIG */
2260 err = hci_cmd_sync_queue(hdev, create_big_sync, conn,
2261 create_big_complete);
2263 hci_conn_drop(conn);
2264 return ERR_PTR(err);
2270 struct hci_conn *hci_connect_cis(struct hci_dev *hdev, bdaddr_t *dst,
2271 __u8 dst_type, struct bt_iso_qos *qos)
2273 struct hci_conn *le;
2274 struct hci_conn *cis;
2275 struct hci_link *link;
2277 if (hci_dev_test_flag(hdev, HCI_ADVERTISING))
2278 le = hci_connect_le(hdev, dst, dst_type, false,
2280 HCI_LE_CONN_TIMEOUT,
2283 le = hci_connect_le_scan(hdev, dst, dst_type,
2285 HCI_LE_CONN_TIMEOUT,
2286 CONN_REASON_ISO_CONNECT);
2290 hci_iso_qos_setup(hdev, le, &qos->ucast.out,
2291 le->le_tx_phy ? le->le_tx_phy : hdev->le_tx_def_phys);
2292 hci_iso_qos_setup(hdev, le, &qos->ucast.in,
2293 le->le_rx_phy ? le->le_rx_phy : hdev->le_rx_def_phys);
2295 cis = hci_bind_cis(hdev, dst, dst_type, qos);
2301 link = hci_conn_link(le, cis);
2305 return ERR_PTR(-ENOLINK);
2308 /* Link takes the refcount */
2311 cis->state = BT_CONNECT;
2313 hci_le_create_cis_pending(hdev);
2318 /* Check link security requirement */
2319 int hci_conn_check_link_mode(struct hci_conn *conn)
2321 BT_DBG("hcon %p", conn);
2323 /* In Secure Connections Only mode, it is required that Secure
2324 * Connections is used and the link is encrypted with AES-CCM
2325 * using a P-256 authenticated combination key.
2327 if (hci_dev_test_flag(conn->hdev, HCI_SC_ONLY)) {
2328 if (!hci_conn_sc_enabled(conn) ||
2329 !test_bit(HCI_CONN_AES_CCM, &conn->flags) ||
2330 conn->key_type != HCI_LK_AUTH_COMBINATION_P256)
2334 /* AES encryption is required for Level 4:
2336 * BLUETOOTH CORE SPECIFICATION Version 5.2 | Vol 3, Part C
2339 * 128-bit equivalent strength for link and encryption keys
2340 * required using FIPS approved algorithms (E0 not allowed,
2341 * SAFER+ not allowed, and P-192 not allowed; encryption key
2344 if (conn->sec_level == BT_SECURITY_FIPS &&
2345 !test_bit(HCI_CONN_AES_CCM, &conn->flags)) {
2346 bt_dev_err(conn->hdev,
2347 "Invalid security: Missing AES-CCM usage");
2351 if (hci_conn_ssp_enabled(conn) &&
2352 !test_bit(HCI_CONN_ENCRYPT, &conn->flags))
2358 /* Authenticate remote device */
2359 static int hci_conn_auth(struct hci_conn *conn, __u8 sec_level, __u8 auth_type)
2361 BT_DBG("hcon %p", conn);
2363 if (conn->pending_sec_level > sec_level)
2364 sec_level = conn->pending_sec_level;
2366 if (sec_level > conn->sec_level)
2367 conn->pending_sec_level = sec_level;
2368 else if (test_bit(HCI_CONN_AUTH, &conn->flags))
2371 /* Make sure we preserve an existing MITM requirement*/
2372 auth_type |= (conn->auth_type & 0x01);
2374 conn->auth_type = auth_type;
2376 if (!test_and_set_bit(HCI_CONN_AUTH_PEND, &conn->flags)) {
2377 struct hci_cp_auth_requested cp;
2379 cp.handle = cpu_to_le16(conn->handle);
2380 hci_send_cmd(conn->hdev, HCI_OP_AUTH_REQUESTED,
2383 /* If we're already encrypted set the REAUTH_PEND flag,
2384 * otherwise set the ENCRYPT_PEND.
2386 if (test_bit(HCI_CONN_ENCRYPT, &conn->flags))
2387 set_bit(HCI_CONN_REAUTH_PEND, &conn->flags);
2389 set_bit(HCI_CONN_ENCRYPT_PEND, &conn->flags);
2395 /* Encrypt the link */
2396 static void hci_conn_encrypt(struct hci_conn *conn)
2398 BT_DBG("hcon %p", conn);
2400 if (!test_and_set_bit(HCI_CONN_ENCRYPT_PEND, &conn->flags)) {
2401 struct hci_cp_set_conn_encrypt cp;
2402 cp.handle = cpu_to_le16(conn->handle);
2404 hci_send_cmd(conn->hdev, HCI_OP_SET_CONN_ENCRYPT, sizeof(cp),
2409 /* Enable security */
2410 int hci_conn_security(struct hci_conn *conn, __u8 sec_level, __u8 auth_type,
2413 BT_DBG("hcon %p", conn);
2415 if (conn->type == LE_LINK)
2416 return smp_conn_security(conn, sec_level);
2418 /* For sdp we don't need the link key. */
2419 if (sec_level == BT_SECURITY_SDP)
2422 /* For non 2.1 devices and low security level we don't need the link
2424 if (sec_level == BT_SECURITY_LOW && !hci_conn_ssp_enabled(conn))
2427 /* For other security levels we need the link key. */
2428 if (!test_bit(HCI_CONN_AUTH, &conn->flags))
2431 switch (conn->key_type) {
2432 case HCI_LK_AUTH_COMBINATION_P256:
2433 /* An authenticated FIPS approved combination key has
2434 * sufficient security for security level 4 or lower.
2436 if (sec_level <= BT_SECURITY_FIPS)
2439 case HCI_LK_AUTH_COMBINATION_P192:
2440 /* An authenticated combination key has sufficient security for
2441 * security level 3 or lower.
2443 if (sec_level <= BT_SECURITY_HIGH)
2446 case HCI_LK_UNAUTH_COMBINATION_P192:
2447 case HCI_LK_UNAUTH_COMBINATION_P256:
2448 /* An unauthenticated combination key has sufficient security
2449 * for security level 2 or lower.
2451 if (sec_level <= BT_SECURITY_MEDIUM)
2454 case HCI_LK_COMBINATION:
2455 /* A combination key has always sufficient security for the
2456 * security levels 2 or lower. High security level requires the
2457 * combination key is generated using maximum PIN code length
2458 * (16). For pre 2.1 units.
2460 if (sec_level <= BT_SECURITY_MEDIUM || conn->pin_length == 16)
2468 if (test_bit(HCI_CONN_ENCRYPT_PEND, &conn->flags))
2472 set_bit(HCI_CONN_AUTH_INITIATOR, &conn->flags);
2474 if (!hci_conn_auth(conn, sec_level, auth_type))
2478 if (test_bit(HCI_CONN_ENCRYPT, &conn->flags)) {
2479 /* Ensure that the encryption key size has been read,
2480 * otherwise stall the upper layer responses.
2482 if (!conn->enc_key_size)
2485 /* Nothing else needed, all requirements are met */
2489 hci_conn_encrypt(conn);
2492 EXPORT_SYMBOL(hci_conn_security);
2494 /* Check secure link requirement */
2495 int hci_conn_check_secure(struct hci_conn *conn, __u8 sec_level)
2497 BT_DBG("hcon %p", conn);
2499 /* Accept if non-secure or higher security level is required */
2500 if (sec_level != BT_SECURITY_HIGH && sec_level != BT_SECURITY_FIPS)
2503 /* Accept if secure or higher security level is already present */
2504 if (conn->sec_level == BT_SECURITY_HIGH ||
2505 conn->sec_level == BT_SECURITY_FIPS)
2508 /* Reject not secure link */
2511 EXPORT_SYMBOL(hci_conn_check_secure);
2514 int hci_conn_switch_role(struct hci_conn *conn, __u8 role)
2516 BT_DBG("hcon %p", conn);
2518 if (role == conn->role)
2521 if (!test_and_set_bit(HCI_CONN_RSWITCH_PEND, &conn->flags)) {
2522 struct hci_cp_switch_role cp;
2523 bacpy(&cp.bdaddr, &conn->dst);
2525 hci_send_cmd(conn->hdev, HCI_OP_SWITCH_ROLE, sizeof(cp), &cp);
2530 EXPORT_SYMBOL(hci_conn_switch_role);
2532 /* Enter active mode */
2533 void hci_conn_enter_active_mode(struct hci_conn *conn, __u8 force_active)
2535 struct hci_dev *hdev = conn->hdev;
2537 BT_DBG("hcon %p mode %d", conn, conn->mode);
2539 if (conn->mode != HCI_CM_SNIFF)
2542 if (!test_bit(HCI_CONN_POWER_SAVE, &conn->flags) && !force_active)
2545 if (!test_and_set_bit(HCI_CONN_MODE_CHANGE_PEND, &conn->flags)) {
2546 struct hci_cp_exit_sniff_mode cp;
2547 cp.handle = cpu_to_le16(conn->handle);
2548 hci_send_cmd(hdev, HCI_OP_EXIT_SNIFF_MODE, sizeof(cp), &cp);
2552 if (hdev->idle_timeout > 0)
2553 queue_delayed_work(hdev->workqueue, &conn->idle_work,
2554 msecs_to_jiffies(hdev->idle_timeout));
2557 /* Drop all connection on the device */
2558 void hci_conn_hash_flush(struct hci_dev *hdev)
2560 struct list_head *head = &hdev->conn_hash.list;
2561 struct hci_conn *conn;
2563 BT_DBG("hdev %s", hdev->name);
2565 /* We should not traverse the list here, because hci_conn_del
2566 * can remove extra links, which may cause the list traversal
2567 * to hit items that have already been released.
2569 while ((conn = list_first_entry_or_null(head,
2572 conn->state = BT_CLOSED;
2573 hci_disconn_cfm(conn, HCI_ERROR_LOCAL_HOST_TERM);
2578 /* Check pending connect attempts */
2579 void hci_conn_check_pending(struct hci_dev *hdev)
2581 struct hci_conn *conn;
2583 BT_DBG("hdev %s", hdev->name);
2587 conn = hci_conn_hash_lookup_state(hdev, ACL_LINK, BT_CONNECT2);
2589 hci_acl_create_connection(conn);
2591 hci_dev_unlock(hdev);
2594 static u32 get_link_mode(struct hci_conn *conn)
2598 if (conn->role == HCI_ROLE_MASTER)
2599 link_mode |= HCI_LM_MASTER;
2601 if (test_bit(HCI_CONN_ENCRYPT, &conn->flags))
2602 link_mode |= HCI_LM_ENCRYPT;
2604 if (test_bit(HCI_CONN_AUTH, &conn->flags))
2605 link_mode |= HCI_LM_AUTH;
2607 if (test_bit(HCI_CONN_SECURE, &conn->flags))
2608 link_mode |= HCI_LM_SECURE;
2610 if (test_bit(HCI_CONN_FIPS, &conn->flags))
2611 link_mode |= HCI_LM_FIPS;
2616 int hci_get_conn_list(void __user *arg)
2619 struct hci_conn_list_req req, *cl;
2620 struct hci_conn_info *ci;
2621 struct hci_dev *hdev;
2622 int n = 0, size, err;
2624 if (copy_from_user(&req, arg, sizeof(req)))
2627 if (!req.conn_num || req.conn_num > (PAGE_SIZE * 2) / sizeof(*ci))
2630 size = sizeof(req) + req.conn_num * sizeof(*ci);
2632 cl = kmalloc(size, GFP_KERNEL);
2636 hdev = hci_dev_get(req.dev_id);
2645 list_for_each_entry(c, &hdev->conn_hash.list, list) {
2646 bacpy(&(ci + n)->bdaddr, &c->dst);
2647 (ci + n)->handle = c->handle;
2648 (ci + n)->type = c->type;
2649 (ci + n)->out = c->out;
2650 (ci + n)->state = c->state;
2651 (ci + n)->link_mode = get_link_mode(c);
2652 if (++n >= req.conn_num)
2655 hci_dev_unlock(hdev);
2657 cl->dev_id = hdev->id;
2659 size = sizeof(req) + n * sizeof(*ci);
2663 err = copy_to_user(arg, cl, size);
2666 return err ? -EFAULT : 0;
2669 int hci_get_conn_info(struct hci_dev *hdev, void __user *arg)
2671 struct hci_conn_info_req req;
2672 struct hci_conn_info ci;
2673 struct hci_conn *conn;
2674 char __user *ptr = arg + sizeof(req);
2676 if (copy_from_user(&req, arg, sizeof(req)))
2680 conn = hci_conn_hash_lookup_ba(hdev, req.type, &req.bdaddr);
2682 bacpy(&ci.bdaddr, &conn->dst);
2683 ci.handle = conn->handle;
2684 ci.type = conn->type;
2686 ci.state = conn->state;
2687 ci.link_mode = get_link_mode(conn);
2689 hci_dev_unlock(hdev);
2694 return copy_to_user(ptr, &ci, sizeof(ci)) ? -EFAULT : 0;
2697 int hci_get_auth_info(struct hci_dev *hdev, void __user *arg)
2699 struct hci_auth_info_req req;
2700 struct hci_conn *conn;
2702 if (copy_from_user(&req, arg, sizeof(req)))
2706 conn = hci_conn_hash_lookup_ba(hdev, ACL_LINK, &req.bdaddr);
2708 req.type = conn->auth_type;
2709 hci_dev_unlock(hdev);
2714 return copy_to_user(arg, &req, sizeof(req)) ? -EFAULT : 0;
2717 struct hci_chan *hci_chan_create(struct hci_conn *conn)
2719 struct hci_dev *hdev = conn->hdev;
2720 struct hci_chan *chan;
2722 BT_DBG("%s hcon %p", hdev->name, conn);
2724 if (test_bit(HCI_CONN_DROP, &conn->flags)) {
2725 BT_DBG("Refusing to create new hci_chan");
2729 chan = kzalloc(sizeof(*chan), GFP_KERNEL);
2733 chan->conn = hci_conn_get(conn);
2734 skb_queue_head_init(&chan->data_q);
2735 chan->state = BT_CONNECTED;
2737 list_add_rcu(&chan->list, &conn->chan_list);
2742 void hci_chan_del(struct hci_chan *chan)
2744 struct hci_conn *conn = chan->conn;
2745 struct hci_dev *hdev = conn->hdev;
2747 BT_DBG("%s hcon %p chan %p", hdev->name, conn, chan);
2749 list_del_rcu(&chan->list);
2753 /* Prevent new hci_chan's to be created for this hci_conn */
2754 set_bit(HCI_CONN_DROP, &conn->flags);
2758 skb_queue_purge(&chan->data_q);
2762 void hci_chan_list_flush(struct hci_conn *conn)
2764 struct hci_chan *chan, *n;
2766 BT_DBG("hcon %p", conn);
2768 list_for_each_entry_safe(chan, n, &conn->chan_list, list)
2772 static struct hci_chan *__hci_chan_lookup_handle(struct hci_conn *hcon,
2775 struct hci_chan *hchan;
2777 list_for_each_entry(hchan, &hcon->chan_list, list) {
2778 if (hchan->handle == handle)
2785 struct hci_chan *hci_chan_lookup_handle(struct hci_dev *hdev, __u16 handle)
2787 struct hci_conn_hash *h = &hdev->conn_hash;
2788 struct hci_conn *hcon;
2789 struct hci_chan *hchan = NULL;
2793 list_for_each_entry_rcu(hcon, &h->list, list) {
2794 hchan = __hci_chan_lookup_handle(hcon, handle);
2804 u32 hci_conn_get_phy(struct hci_conn *conn)
2808 /* BLUETOOTH CORE SPECIFICATION Version 5.2 | Vol 2, Part B page 471:
2809 * Table 6.2: Packets defined for synchronous, asynchronous, and
2810 * CPB logical transport types.
2812 switch (conn->type) {
2814 /* SCO logical transport (1 Mb/s):
2815 * HV1, HV2, HV3 and DV.
2817 phys |= BT_PHY_BR_1M_1SLOT;
2822 /* ACL logical transport (1 Mb/s) ptt=0:
2823 * DH1, DM3, DH3, DM5 and DH5.
2825 phys |= BT_PHY_BR_1M_1SLOT;
2827 if (conn->pkt_type & (HCI_DM3 | HCI_DH3))
2828 phys |= BT_PHY_BR_1M_3SLOT;
2830 if (conn->pkt_type & (HCI_DM5 | HCI_DH5))
2831 phys |= BT_PHY_BR_1M_5SLOT;
2833 /* ACL logical transport (2 Mb/s) ptt=1:
2834 * 2-DH1, 2-DH3 and 2-DH5.
2836 if (!(conn->pkt_type & HCI_2DH1))
2837 phys |= BT_PHY_EDR_2M_1SLOT;
2839 if (!(conn->pkt_type & HCI_2DH3))
2840 phys |= BT_PHY_EDR_2M_3SLOT;
2842 if (!(conn->pkt_type & HCI_2DH5))
2843 phys |= BT_PHY_EDR_2M_5SLOT;
2845 /* ACL logical transport (3 Mb/s) ptt=1:
2846 * 3-DH1, 3-DH3 and 3-DH5.
2848 if (!(conn->pkt_type & HCI_3DH1))
2849 phys |= BT_PHY_EDR_3M_1SLOT;
2851 if (!(conn->pkt_type & HCI_3DH3))
2852 phys |= BT_PHY_EDR_3M_3SLOT;
2854 if (!(conn->pkt_type & HCI_3DH5))
2855 phys |= BT_PHY_EDR_3M_5SLOT;
2860 /* eSCO logical transport (1 Mb/s): EV3, EV4 and EV5 */
2861 phys |= BT_PHY_BR_1M_1SLOT;
2863 if (!(conn->pkt_type & (ESCO_EV4 | ESCO_EV5)))
2864 phys |= BT_PHY_BR_1M_3SLOT;
2866 /* eSCO logical transport (2 Mb/s): 2-EV3, 2-EV5 */
2867 if (!(conn->pkt_type & ESCO_2EV3))
2868 phys |= BT_PHY_EDR_2M_1SLOT;
2870 if (!(conn->pkt_type & ESCO_2EV5))
2871 phys |= BT_PHY_EDR_2M_3SLOT;
2873 /* eSCO logical transport (3 Mb/s): 3-EV3, 3-EV5 */
2874 if (!(conn->pkt_type & ESCO_3EV3))
2875 phys |= BT_PHY_EDR_3M_1SLOT;
2877 if (!(conn->pkt_type & ESCO_3EV5))
2878 phys |= BT_PHY_EDR_3M_3SLOT;
2883 if (conn->le_tx_phy & HCI_LE_SET_PHY_1M)
2884 phys |= BT_PHY_LE_1M_TX;
2886 if (conn->le_rx_phy & HCI_LE_SET_PHY_1M)
2887 phys |= BT_PHY_LE_1M_RX;
2889 if (conn->le_tx_phy & HCI_LE_SET_PHY_2M)
2890 phys |= BT_PHY_LE_2M_TX;
2892 if (conn->le_rx_phy & HCI_LE_SET_PHY_2M)
2893 phys |= BT_PHY_LE_2M_RX;
2895 if (conn->le_tx_phy & HCI_LE_SET_PHY_CODED)
2896 phys |= BT_PHY_LE_CODED_TX;
2898 if (conn->le_rx_phy & HCI_LE_SET_PHY_CODED)
2899 phys |= BT_PHY_LE_CODED_RX;
2907 static int abort_conn_sync(struct hci_dev *hdev, void *data)
2909 struct hci_conn *conn;
2910 u16 handle = PTR_UINT(data);
2912 conn = hci_conn_hash_lookup_handle(hdev, handle);
2916 return hci_abort_conn_sync(hdev, conn, conn->abort_reason);
2919 int hci_abort_conn(struct hci_conn *conn, u8 reason)
2921 struct hci_dev *hdev = conn->hdev;
2923 /* If abort_reason has already been set it means the connection is
2924 * already being aborted so don't attempt to overwrite it.
2926 if (conn->abort_reason)
2929 bt_dev_dbg(hdev, "handle 0x%2.2x reason 0x%2.2x", conn->handle, reason);
2931 conn->abort_reason = reason;
2933 /* If the connection is pending check the command opcode since that
2934 * might be blocking on hci_cmd_sync_work while waiting its respective
2935 * event so we need to hci_cmd_sync_cancel to cancel it.
2937 * hci_connect_le serializes the connection attempts so only one
2938 * connection can be in BT_CONNECT at time.
2940 if (conn->state == BT_CONNECT && hdev->req_status == HCI_REQ_PEND) {
2941 switch (hci_skb_event(hdev->sent_cmd)) {
2942 case HCI_EV_LE_CONN_COMPLETE:
2943 case HCI_EV_LE_ENHANCED_CONN_COMPLETE:
2944 case HCI_EVT_LE_CIS_ESTABLISHED:
2945 hci_cmd_sync_cancel(hdev, -ECANCELED);
2950 return hci_cmd_sync_queue(hdev, abort_conn_sync, UINT_PTR(conn->handle),