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"
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 void hci_connect_le_scan_cleanup(struct hci_conn *conn, u8 status)
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,
95 hci_conn_drop(params->conn);
96 hci_conn_put(params->conn);
100 if (!params->explicit_connect)
103 /* If the status indicates successful cancellation of
104 * the attempt (i.e. Unknown Connection Id) there's no point of
105 * notifying failure since we'll go back to keep trying to
106 * connect. The only exception is explicit connect requests
107 * where a timeout + cancel does indicate an actual failure.
109 if (status && status != HCI_ERROR_UNKNOWN_CONN_ID)
110 mgmt_connect_failed(hdev, &conn->dst, conn->type,
111 conn->dst_type, status);
113 /* The connection attempt was doing scan for new RPA, and is
114 * in scan phase. If params are not associated with any other
115 * autoconnect action, remove them completely. If they are, just unmark
116 * them as waiting for connection, by clearing explicit_connect field.
118 params->explicit_connect = false;
120 hci_pend_le_list_del_init(params);
122 switch (params->auto_connect) {
123 case HCI_AUTO_CONN_EXPLICIT:
124 hci_conn_params_del(hdev, bdaddr, bdaddr_type);
125 /* return instead of break to avoid duplicate scan update */
127 case HCI_AUTO_CONN_DIRECT:
128 case HCI_AUTO_CONN_ALWAYS:
129 hci_pend_le_list_add(params, &hdev->pend_le_conns);
131 case HCI_AUTO_CONN_REPORT:
132 hci_pend_le_list_add(params, &hdev->pend_le_reports);
138 hci_update_passive_scan(hdev);
141 static void hci_conn_cleanup(struct hci_conn *conn)
143 struct hci_dev *hdev = conn->hdev;
145 if (test_bit(HCI_CONN_PARAM_REMOVAL_PEND, &conn->flags))
146 hci_conn_params_del(conn->hdev, &conn->dst, conn->dst_type);
148 if (test_and_clear_bit(HCI_CONN_FLUSH_KEY, &conn->flags))
149 hci_remove_link_key(hdev, &conn->dst);
151 hci_chan_list_flush(conn);
153 hci_conn_hash_del(hdev, conn);
155 if (HCI_CONN_HANDLE_UNSET(conn->handle))
156 ida_free(&hdev->unset_handle_ida, conn->handle);
161 if (conn->type == SCO_LINK || conn->type == ESCO_LINK) {
162 switch (conn->setting & SCO_AIRMODE_MASK) {
163 case SCO_AIRMODE_CVSD:
164 case SCO_AIRMODE_TRANSP:
166 hdev->notify(hdev, HCI_NOTIFY_DISABLE_SCO);
171 hdev->notify(hdev, HCI_NOTIFY_CONN_DEL);
174 debugfs_remove_recursive(conn->debugfs);
176 hci_conn_del_sysfs(conn);
181 int hci_disconnect(struct hci_conn *conn, __u8 reason)
183 BT_DBG("hcon %p", conn);
185 /* When we are central of an established connection and it enters
186 * the disconnect timeout, then go ahead and try to read the
187 * current clock offset. Processing of the result is done
188 * within the event handling and hci_clock_offset_evt function.
190 if (conn->type == ACL_LINK && conn->role == HCI_ROLE_MASTER &&
191 (conn->state == BT_CONNECTED || conn->state == BT_CONFIG)) {
192 struct hci_dev *hdev = conn->hdev;
193 struct hci_cp_read_clock_offset clkoff_cp;
195 clkoff_cp.handle = cpu_to_le16(conn->handle);
196 hci_send_cmd(hdev, HCI_OP_READ_CLOCK_OFFSET, sizeof(clkoff_cp),
200 return hci_abort_conn(conn, reason);
203 static void hci_add_sco(struct hci_conn *conn, __u16 handle)
205 struct hci_dev *hdev = conn->hdev;
206 struct hci_cp_add_sco cp;
208 BT_DBG("hcon %p", conn);
210 conn->state = BT_CONNECT;
215 cp.handle = cpu_to_le16(handle);
216 cp.pkt_type = cpu_to_le16(conn->pkt_type);
218 hci_send_cmd(hdev, HCI_OP_ADD_SCO, sizeof(cp), &cp);
221 static bool find_next_esco_param(struct hci_conn *conn,
222 const struct sco_param *esco_param, int size)
227 for (; conn->attempt <= size; conn->attempt++) {
228 if (lmp_esco_2m_capable(conn->parent) ||
229 (esco_param[conn->attempt - 1].pkt_type & ESCO_2EV3))
231 BT_DBG("hcon %p skipped attempt %d, eSCO 2M not supported",
232 conn, conn->attempt);
235 return conn->attempt <= size;
238 static int configure_datapath_sync(struct hci_dev *hdev, struct bt_codec *codec)
241 __u8 vnd_len, *vnd_data = NULL;
242 struct hci_op_configure_data_path *cmd = NULL;
244 if (!codec->data_path || !hdev->get_codec_config_data)
247 /* Do not take me as error */
248 if (!hdev->get_codec_config_data)
251 err = hdev->get_codec_config_data(hdev, ESCO_LINK, codec, &vnd_len,
256 cmd = kzalloc(sizeof(*cmd) + vnd_len, GFP_KERNEL);
262 err = hdev->get_data_path_id(hdev, &cmd->data_path_id);
266 cmd->vnd_len = vnd_len;
267 memcpy(cmd->vnd_data, vnd_data, vnd_len);
269 cmd->direction = 0x00;
270 __hci_cmd_sync_status(hdev, HCI_CONFIGURE_DATA_PATH,
271 sizeof(*cmd) + vnd_len, cmd, HCI_CMD_TIMEOUT);
273 cmd->direction = 0x01;
274 err = __hci_cmd_sync_status(hdev, HCI_CONFIGURE_DATA_PATH,
275 sizeof(*cmd) + vnd_len, cmd,
284 static int hci_enhanced_setup_sync(struct hci_dev *hdev, void *data)
286 struct conn_handle_t *conn_handle = data;
287 struct hci_conn *conn = conn_handle->conn;
288 __u16 handle = conn_handle->handle;
289 struct hci_cp_enhanced_setup_sync_conn cp;
290 const struct sco_param *param;
294 bt_dev_dbg(hdev, "hcon %p", conn);
296 configure_datapath_sync(hdev, &conn->codec);
298 conn->state = BT_CONNECT;
303 memset(&cp, 0x00, sizeof(cp));
305 cp.handle = cpu_to_le16(handle);
307 cp.tx_bandwidth = cpu_to_le32(0x00001f40);
308 cp.rx_bandwidth = cpu_to_le32(0x00001f40);
310 switch (conn->codec.id) {
312 if (!find_next_esco_param(conn, esco_param_msbc,
313 ARRAY_SIZE(esco_param_msbc)))
316 param = &esco_param_msbc[conn->attempt - 1];
317 cp.tx_coding_format.id = 0x05;
318 cp.rx_coding_format.id = 0x05;
319 cp.tx_codec_frame_size = __cpu_to_le16(60);
320 cp.rx_codec_frame_size = __cpu_to_le16(60);
321 cp.in_bandwidth = __cpu_to_le32(32000);
322 cp.out_bandwidth = __cpu_to_le32(32000);
323 cp.in_coding_format.id = 0x04;
324 cp.out_coding_format.id = 0x04;
325 cp.in_coded_data_size = __cpu_to_le16(16);
326 cp.out_coded_data_size = __cpu_to_le16(16);
327 cp.in_pcm_data_format = 2;
328 cp.out_pcm_data_format = 2;
329 cp.in_pcm_sample_payload_msb_pos = 0;
330 cp.out_pcm_sample_payload_msb_pos = 0;
331 cp.in_data_path = conn->codec.data_path;
332 cp.out_data_path = conn->codec.data_path;
333 cp.in_transport_unit_size = 1;
334 cp.out_transport_unit_size = 1;
337 case BT_CODEC_TRANSPARENT:
338 if (!find_next_esco_param(conn, esco_param_msbc,
339 ARRAY_SIZE(esco_param_msbc)))
341 param = &esco_param_msbc[conn->attempt - 1];
342 cp.tx_coding_format.id = 0x03;
343 cp.rx_coding_format.id = 0x03;
344 cp.tx_codec_frame_size = __cpu_to_le16(60);
345 cp.rx_codec_frame_size = __cpu_to_le16(60);
346 cp.in_bandwidth = __cpu_to_le32(0x1f40);
347 cp.out_bandwidth = __cpu_to_le32(0x1f40);
348 cp.in_coding_format.id = 0x03;
349 cp.out_coding_format.id = 0x03;
350 cp.in_coded_data_size = __cpu_to_le16(16);
351 cp.out_coded_data_size = __cpu_to_le16(16);
352 cp.in_pcm_data_format = 2;
353 cp.out_pcm_data_format = 2;
354 cp.in_pcm_sample_payload_msb_pos = 0;
355 cp.out_pcm_sample_payload_msb_pos = 0;
356 cp.in_data_path = conn->codec.data_path;
357 cp.out_data_path = conn->codec.data_path;
358 cp.in_transport_unit_size = 1;
359 cp.out_transport_unit_size = 1;
363 if (conn->parent && lmp_esco_capable(conn->parent)) {
364 if (!find_next_esco_param(conn, esco_param_cvsd,
365 ARRAY_SIZE(esco_param_cvsd)))
367 param = &esco_param_cvsd[conn->attempt - 1];
369 if (conn->attempt > ARRAY_SIZE(sco_param_cvsd))
371 param = &sco_param_cvsd[conn->attempt - 1];
373 cp.tx_coding_format.id = 2;
374 cp.rx_coding_format.id = 2;
375 cp.tx_codec_frame_size = __cpu_to_le16(60);
376 cp.rx_codec_frame_size = __cpu_to_le16(60);
377 cp.in_bandwidth = __cpu_to_le32(16000);
378 cp.out_bandwidth = __cpu_to_le32(16000);
379 cp.in_coding_format.id = 4;
380 cp.out_coding_format.id = 4;
381 cp.in_coded_data_size = __cpu_to_le16(16);
382 cp.out_coded_data_size = __cpu_to_le16(16);
383 cp.in_pcm_data_format = 2;
384 cp.out_pcm_data_format = 2;
385 cp.in_pcm_sample_payload_msb_pos = 0;
386 cp.out_pcm_sample_payload_msb_pos = 0;
387 cp.in_data_path = conn->codec.data_path;
388 cp.out_data_path = conn->codec.data_path;
389 cp.in_transport_unit_size = 16;
390 cp.out_transport_unit_size = 16;
396 cp.retrans_effort = param->retrans_effort;
397 cp.pkt_type = __cpu_to_le16(param->pkt_type);
398 cp.max_latency = __cpu_to_le16(param->max_latency);
400 if (hci_send_cmd(hdev, HCI_OP_ENHANCED_SETUP_SYNC_CONN, sizeof(cp), &cp) < 0)
406 static bool hci_setup_sync_conn(struct hci_conn *conn, __u16 handle)
408 struct hci_dev *hdev = conn->hdev;
409 struct hci_cp_setup_sync_conn cp;
410 const struct sco_param *param;
412 bt_dev_dbg(hdev, "hcon %p", conn);
414 conn->state = BT_CONNECT;
419 cp.handle = cpu_to_le16(handle);
421 cp.tx_bandwidth = cpu_to_le32(0x00001f40);
422 cp.rx_bandwidth = cpu_to_le32(0x00001f40);
423 cp.voice_setting = cpu_to_le16(conn->setting);
425 switch (conn->setting & SCO_AIRMODE_MASK) {
426 case SCO_AIRMODE_TRANSP:
427 if (!find_next_esco_param(conn, esco_param_msbc,
428 ARRAY_SIZE(esco_param_msbc)))
430 param = &esco_param_msbc[conn->attempt - 1];
432 case SCO_AIRMODE_CVSD:
433 if (conn->parent && lmp_esco_capable(conn->parent)) {
434 if (!find_next_esco_param(conn, esco_param_cvsd,
435 ARRAY_SIZE(esco_param_cvsd)))
437 param = &esco_param_cvsd[conn->attempt - 1];
439 if (conn->attempt > ARRAY_SIZE(sco_param_cvsd))
441 param = &sco_param_cvsd[conn->attempt - 1];
448 cp.retrans_effort = param->retrans_effort;
449 cp.pkt_type = __cpu_to_le16(param->pkt_type);
450 cp.max_latency = __cpu_to_le16(param->max_latency);
452 if (hci_send_cmd(hdev, HCI_OP_SETUP_SYNC_CONN, sizeof(cp), &cp) < 0)
458 bool hci_setup_sync(struct hci_conn *conn, __u16 handle)
461 struct conn_handle_t *conn_handle;
463 if (enhanced_sync_conn_capable(conn->hdev)) {
464 conn_handle = kzalloc(sizeof(*conn_handle), GFP_KERNEL);
469 conn_handle->conn = conn;
470 conn_handle->handle = handle;
471 result = hci_cmd_sync_queue(conn->hdev, hci_enhanced_setup_sync,
479 return hci_setup_sync_conn(conn, handle);
482 u8 hci_le_conn_update(struct hci_conn *conn, u16 min, u16 max, u16 latency,
485 struct hci_dev *hdev = conn->hdev;
486 struct hci_conn_params *params;
487 struct hci_cp_le_conn_update cp;
491 params = hci_conn_params_lookup(hdev, &conn->dst, conn->dst_type);
493 params->conn_min_interval = min;
494 params->conn_max_interval = max;
495 params->conn_latency = latency;
496 params->supervision_timeout = to_multiplier;
499 hci_dev_unlock(hdev);
501 memset(&cp, 0, sizeof(cp));
502 cp.handle = cpu_to_le16(conn->handle);
503 cp.conn_interval_min = cpu_to_le16(min);
504 cp.conn_interval_max = cpu_to_le16(max);
505 cp.conn_latency = cpu_to_le16(latency);
506 cp.supervision_timeout = cpu_to_le16(to_multiplier);
507 cp.min_ce_len = cpu_to_le16(0x0000);
508 cp.max_ce_len = cpu_to_le16(0x0000);
510 hci_send_cmd(hdev, HCI_OP_LE_CONN_UPDATE, sizeof(cp), &cp);
518 void hci_le_start_enc(struct hci_conn *conn, __le16 ediv, __le64 rand,
519 __u8 ltk[16], __u8 key_size)
521 struct hci_dev *hdev = conn->hdev;
522 struct hci_cp_le_start_enc cp;
524 BT_DBG("hcon %p", conn);
526 memset(&cp, 0, sizeof(cp));
528 cp.handle = cpu_to_le16(conn->handle);
531 memcpy(cp.ltk, ltk, key_size);
533 hci_send_cmd(hdev, HCI_OP_LE_START_ENC, sizeof(cp), &cp);
536 /* Device _must_ be locked */
537 void hci_sco_setup(struct hci_conn *conn, __u8 status)
539 struct hci_link *link;
541 link = list_first_entry_or_null(&conn->link_list, struct hci_link, list);
542 if (!link || !link->conn)
545 BT_DBG("hcon %p", conn);
548 if (lmp_esco_capable(conn->hdev))
549 hci_setup_sync(link->conn, conn->handle);
551 hci_add_sco(link->conn, conn->handle);
553 hci_connect_cfm(link->conn, status);
554 hci_conn_del(link->conn);
558 static void hci_conn_timeout(struct work_struct *work)
560 struct hci_conn *conn = container_of(work, struct hci_conn,
562 int refcnt = atomic_read(&conn->refcnt);
564 BT_DBG("hcon %p state %s", conn, state_to_string(conn->state));
568 /* FIXME: It was observed that in pairing failed scenario, refcnt
569 * drops below 0. Probably this is because l2cap_conn_del calls
570 * l2cap_chan_del for each channel, and inside l2cap_chan_del conn is
571 * dropped. After that loop hci_chan_del is called which also drops
572 * conn. For now make sure that ACL is alive if refcnt is higher then 0,
578 hci_abort_conn(conn, hci_proto_disconn_ind(conn));
581 /* Enter sniff mode */
582 static void hci_conn_idle(struct work_struct *work)
584 struct hci_conn *conn = container_of(work, struct hci_conn,
586 struct hci_dev *hdev = conn->hdev;
588 BT_DBG("hcon %p mode %d", conn, conn->mode);
590 if (!lmp_sniff_capable(hdev) || !lmp_sniff_capable(conn))
593 if (conn->mode != HCI_CM_ACTIVE || !(conn->link_policy & HCI_LP_SNIFF))
596 if (lmp_sniffsubr_capable(hdev) && lmp_sniffsubr_capable(conn)) {
597 struct hci_cp_sniff_subrate cp;
598 cp.handle = cpu_to_le16(conn->handle);
599 cp.max_latency = cpu_to_le16(0);
600 cp.min_remote_timeout = cpu_to_le16(0);
601 cp.min_local_timeout = cpu_to_le16(0);
602 hci_send_cmd(hdev, HCI_OP_SNIFF_SUBRATE, sizeof(cp), &cp);
605 if (!test_and_set_bit(HCI_CONN_MODE_CHANGE_PEND, &conn->flags)) {
606 struct hci_cp_sniff_mode cp;
607 cp.handle = cpu_to_le16(conn->handle);
608 cp.max_interval = cpu_to_le16(hdev->sniff_max_interval);
609 cp.min_interval = cpu_to_le16(hdev->sniff_min_interval);
610 cp.attempt = cpu_to_le16(4);
611 cp.timeout = cpu_to_le16(1);
612 hci_send_cmd(hdev, HCI_OP_SNIFF_MODE, sizeof(cp), &cp);
616 static void hci_conn_auto_accept(struct work_struct *work)
618 struct hci_conn *conn = container_of(work, struct hci_conn,
619 auto_accept_work.work);
621 hci_send_cmd(conn->hdev, HCI_OP_USER_CONFIRM_REPLY, sizeof(conn->dst),
625 static void le_disable_advertising(struct hci_dev *hdev)
627 if (ext_adv_capable(hdev)) {
628 struct hci_cp_le_set_ext_adv_enable cp;
631 cp.num_of_sets = 0x00;
633 hci_send_cmd(hdev, HCI_OP_LE_SET_EXT_ADV_ENABLE, sizeof(cp),
637 hci_send_cmd(hdev, HCI_OP_LE_SET_ADV_ENABLE, sizeof(enable),
642 static void le_conn_timeout(struct work_struct *work)
644 struct hci_conn *conn = container_of(work, struct hci_conn,
645 le_conn_timeout.work);
646 struct hci_dev *hdev = conn->hdev;
650 /* We could end up here due to having done directed advertising,
651 * so clean up the state if necessary. This should however only
652 * happen with broken hardware or if low duty cycle was used
653 * (which doesn't have a timeout of its own).
655 if (conn->role == HCI_ROLE_SLAVE) {
656 /* Disable LE Advertising */
657 le_disable_advertising(hdev);
659 hci_conn_failed(conn, HCI_ERROR_ADVERTISING_TIMEOUT);
660 hci_dev_unlock(hdev);
664 hci_abort_conn(conn, HCI_ERROR_REMOTE_USER_TERM);
667 struct iso_cig_params {
668 struct hci_cp_le_set_cig_params cp;
669 struct hci_cis_params cis[0x1f];
672 struct iso_list_data {
688 static void bis_list(struct hci_conn *conn, void *data)
690 struct iso_list_data *d = data;
692 /* Skip if not broadcast/ANY address */
693 if (bacmp(&conn->dst, BDADDR_ANY))
696 if (d->big != conn->iso_qos.bcast.big || d->bis == BT_ISO_QOS_BIS_UNSET ||
697 d->bis != conn->iso_qos.bcast.bis)
703 static int terminate_big_sync(struct hci_dev *hdev, void *data)
705 struct iso_list_data *d = data;
707 bt_dev_dbg(hdev, "big 0x%2.2x bis 0x%2.2x", d->big, d->bis);
709 hci_disable_per_advertising_sync(hdev, d->bis);
710 hci_remove_ext_adv_instance_sync(hdev, d->bis, NULL);
712 /* Only terminate BIG if it has been created */
716 return hci_le_terminate_big_sync(hdev, d->big,
717 HCI_ERROR_LOCAL_HOST_TERM);
720 static void terminate_big_destroy(struct hci_dev *hdev, void *data, int err)
725 static int hci_le_terminate_big(struct hci_dev *hdev, struct hci_conn *conn)
727 struct iso_list_data *d;
730 bt_dev_dbg(hdev, "big 0x%2.2x bis 0x%2.2x", conn->iso_qos.bcast.big,
731 conn->iso_qos.bcast.bis);
733 d = kzalloc(sizeof(*d), GFP_KERNEL);
737 d->big = conn->iso_qos.bcast.big;
738 d->bis = conn->iso_qos.bcast.bis;
739 d->big_term = test_and_clear_bit(HCI_CONN_BIG_CREATED, &conn->flags);
741 ret = hci_cmd_sync_queue(hdev, terminate_big_sync, d,
742 terminate_big_destroy);
749 static int big_terminate_sync(struct hci_dev *hdev, void *data)
751 struct iso_list_data *d = data;
753 bt_dev_dbg(hdev, "big 0x%2.2x sync_handle 0x%4.4x", d->big,
756 if (d->big_sync_term)
757 hci_le_big_terminate_sync(hdev, d->big);
760 return hci_le_pa_terminate_sync(hdev, d->sync_handle);
765 static void find_bis(struct hci_conn *conn, void *data)
767 struct iso_list_data *d = data;
769 /* Ignore if BIG doesn't match */
770 if (d->big != conn->iso_qos.bcast.big)
776 static int hci_le_big_terminate(struct hci_dev *hdev, u8 big, struct hci_conn *conn)
778 struct iso_list_data *d;
781 bt_dev_dbg(hdev, "big 0x%2.2x sync_handle 0x%4.4x", big, conn->sync_handle);
783 d = kzalloc(sizeof(*d), GFP_KERNEL);
787 memset(d, 0, sizeof(*d));
789 d->sync_handle = conn->sync_handle;
791 if (test_and_clear_bit(HCI_CONN_PA_SYNC, &conn->flags)) {
792 hci_conn_hash_list_flag(hdev, find_bis, ISO_LINK,
793 HCI_CONN_PA_SYNC, d);
796 d->pa_sync_term = true;
801 if (test_and_clear_bit(HCI_CONN_BIG_SYNC, &conn->flags)) {
802 hci_conn_hash_list_flag(hdev, find_bis, ISO_LINK,
803 HCI_CONN_BIG_SYNC, d);
806 d->big_sync_term = true;
809 ret = hci_cmd_sync_queue(hdev, big_terminate_sync, d,
810 terminate_big_destroy);
817 /* Cleanup BIS connection
819 * Detects if there any BIS left connected in a BIG
820 * broadcaster: Remove advertising instance and terminate BIG.
821 * broadcaster receiver: Teminate BIG sync and terminate PA sync.
823 static void bis_cleanup(struct hci_conn *conn)
825 struct hci_dev *hdev = conn->hdev;
826 struct hci_conn *bis;
828 bt_dev_dbg(hdev, "conn %p", conn);
830 if (conn->role == HCI_ROLE_MASTER) {
831 if (!test_and_clear_bit(HCI_CONN_PER_ADV, &conn->flags))
834 /* Check if ISO connection is a BIS and terminate advertising
835 * set and BIG if there are no other connections using it.
837 bis = hci_conn_hash_lookup_big(hdev, conn->iso_qos.bcast.big);
841 hci_le_terminate_big(hdev, conn);
843 hci_le_big_terminate(hdev, conn->iso_qos.bcast.big,
848 static int remove_cig_sync(struct hci_dev *hdev, void *data)
850 u8 handle = PTR_UINT(data);
852 return hci_le_remove_cig_sync(hdev, handle);
855 static int hci_le_remove_cig(struct hci_dev *hdev, u8 handle)
857 bt_dev_dbg(hdev, "handle 0x%2.2x", handle);
859 return hci_cmd_sync_queue(hdev, remove_cig_sync, UINT_PTR(handle),
863 static void find_cis(struct hci_conn *conn, void *data)
865 struct iso_list_data *d = data;
867 /* Ignore broadcast or if CIG don't match */
868 if (!bacmp(&conn->dst, BDADDR_ANY) || d->cig != conn->iso_qos.ucast.cig)
874 /* Cleanup CIS connection:
876 * Detects if there any CIS left connected in a CIG and remove it.
878 static void cis_cleanup(struct hci_conn *conn)
880 struct hci_dev *hdev = conn->hdev;
881 struct iso_list_data d;
883 if (conn->iso_qos.ucast.cig == BT_ISO_QOS_CIG_UNSET)
886 memset(&d, 0, sizeof(d));
887 d.cig = conn->iso_qos.ucast.cig;
889 /* Check if ISO connection is a CIS and remove CIG if there are
890 * no other connections using it.
892 hci_conn_hash_list_state(hdev, find_cis, ISO_LINK, BT_BOUND, &d);
893 hci_conn_hash_list_state(hdev, find_cis, ISO_LINK, BT_CONNECT, &d);
894 hci_conn_hash_list_state(hdev, find_cis, ISO_LINK, BT_CONNECTED, &d);
898 hci_le_remove_cig(hdev, conn->iso_qos.ucast.cig);
901 static int hci_conn_hash_alloc_unset(struct hci_dev *hdev)
903 return ida_alloc_range(&hdev->unset_handle_ida, HCI_CONN_HANDLE_MAX + 1,
904 U16_MAX, GFP_ATOMIC);
907 struct hci_conn *hci_conn_add(struct hci_dev *hdev, int type, bdaddr_t *dst,
910 struct hci_conn *conn;
912 bt_dev_dbg(hdev, "dst %pMR handle 0x%4.4x", dst, handle);
914 conn = kzalloc(sizeof(*conn), GFP_KERNEL);
918 bacpy(&conn->dst, dst);
919 bacpy(&conn->src, &hdev->bdaddr);
920 conn->handle = handle;
924 conn->mode = HCI_CM_ACTIVE;
925 conn->state = BT_OPEN;
926 conn->auth_type = HCI_AT_GENERAL_BONDING;
927 conn->io_capability = hdev->io_capability;
928 conn->remote_auth = 0xff;
929 conn->key_type = 0xff;
930 conn->rssi = HCI_RSSI_INVALID;
931 conn->tx_power = HCI_TX_POWER_INVALID;
932 conn->max_tx_power = HCI_TX_POWER_INVALID;
933 conn->sync_handle = HCI_SYNC_HANDLE_INVALID;
935 set_bit(HCI_CONN_POWER_SAVE, &conn->flags);
936 conn->disc_timeout = HCI_DISCONN_TIMEOUT;
938 /* Set Default Authenticated payload timeout to 30s */
939 conn->auth_payload_timeout = DEFAULT_AUTH_PAYLOAD_TIMEOUT;
941 if (conn->role == HCI_ROLE_MASTER)
946 conn->pkt_type = hdev->pkt_type & ACL_PTYPE_MASK;
949 /* conn->src should reflect the local identity address */
950 hci_copy_identity_address(hdev, &conn->src, &conn->src_type);
953 /* conn->src should reflect the local identity address */
954 hci_copy_identity_address(hdev, &conn->src, &conn->src_type);
956 /* set proper cleanup function */
957 if (!bacmp(dst, BDADDR_ANY))
958 conn->cleanup = bis_cleanup;
959 else if (conn->role == HCI_ROLE_MASTER)
960 conn->cleanup = cis_cleanup;
964 if (lmp_esco_capable(hdev))
965 conn->pkt_type = (hdev->esco_type & SCO_ESCO_MASK) |
966 (hdev->esco_type & EDR_ESCO_MASK);
968 conn->pkt_type = hdev->pkt_type & SCO_PTYPE_MASK;
971 conn->pkt_type = hdev->esco_type & ~EDR_ESCO_MASK;
975 skb_queue_head_init(&conn->data_q);
977 INIT_LIST_HEAD(&conn->chan_list);
978 INIT_LIST_HEAD(&conn->link_list);
980 INIT_DELAYED_WORK(&conn->disc_work, hci_conn_timeout);
981 INIT_DELAYED_WORK(&conn->auto_accept_work, hci_conn_auto_accept);
982 INIT_DELAYED_WORK(&conn->idle_work, hci_conn_idle);
983 INIT_DELAYED_WORK(&conn->le_conn_timeout, le_conn_timeout);
985 atomic_set(&conn->refcnt, 0);
989 hci_conn_hash_add(hdev, conn);
991 /* The SCO and eSCO connections will only be notified when their
992 * setup has been completed. This is different to ACL links which
993 * can be notified right away.
995 if (conn->type != SCO_LINK && conn->type != ESCO_LINK) {
997 hdev->notify(hdev, HCI_NOTIFY_CONN_ADD);
1000 hci_conn_init_sysfs(conn);
1005 struct hci_conn *hci_conn_add_unset(struct hci_dev *hdev, int type,
1006 bdaddr_t *dst, u8 role)
1010 bt_dev_dbg(hdev, "dst %pMR", dst);
1012 handle = hci_conn_hash_alloc_unset(hdev);
1013 if (unlikely(handle < 0))
1016 return hci_conn_add(hdev, type, dst, role, handle);
1019 static void hci_conn_cleanup_child(struct hci_conn *conn, u8 reason)
1022 reason = HCI_ERROR_REMOTE_USER_TERM;
1024 /* Due to race, SCO/ISO conn might be not established yet at this point,
1025 * and nothing else will clean it up. In other cases it is done via HCI
1028 switch (conn->type) {
1031 if (HCI_CONN_HANDLE_UNSET(conn->handle))
1032 hci_conn_failed(conn, reason);
1035 if ((conn->state != BT_CONNECTED &&
1036 !test_bit(HCI_CONN_CREATE_CIS, &conn->flags)) ||
1037 test_bit(HCI_CONN_BIG_CREATED, &conn->flags))
1038 hci_conn_failed(conn, reason);
1043 static void hci_conn_unlink(struct hci_conn *conn)
1045 struct hci_dev *hdev = conn->hdev;
1047 bt_dev_dbg(hdev, "hcon %p", conn);
1049 if (!conn->parent) {
1050 struct hci_link *link, *t;
1052 list_for_each_entry_safe(link, t, &conn->link_list, list) {
1053 struct hci_conn *child = link->conn;
1055 hci_conn_unlink(child);
1057 /* If hdev is down it means
1058 * hci_dev_close_sync/hci_conn_hash_flush is in progress
1059 * and links don't need to be cleanup as all connections
1062 if (!test_bit(HCI_UP, &hdev->flags))
1065 hci_conn_cleanup_child(child, conn->abort_reason);
1074 list_del_rcu(&conn->link->list);
1077 hci_conn_drop(conn->parent);
1078 hci_conn_put(conn->parent);
1079 conn->parent = NULL;
1085 void hci_conn_del(struct hci_conn *conn)
1087 struct hci_dev *hdev = conn->hdev;
1089 BT_DBG("%s hcon %p handle %d", hdev->name, conn, conn->handle);
1091 hci_conn_unlink(conn);
1093 cancel_delayed_work_sync(&conn->disc_work);
1094 cancel_delayed_work_sync(&conn->auto_accept_work);
1095 cancel_delayed_work_sync(&conn->idle_work);
1097 if (conn->type == ACL_LINK) {
1098 /* Unacked frames */
1099 hdev->acl_cnt += conn->sent;
1100 } else if (conn->type == LE_LINK) {
1101 cancel_delayed_work(&conn->le_conn_timeout);
1104 hdev->le_cnt += conn->sent;
1106 hdev->acl_cnt += conn->sent;
1108 /* Unacked ISO frames */
1109 if (conn->type == ISO_LINK) {
1111 hdev->iso_cnt += conn->sent;
1112 else if (hdev->le_pkts)
1113 hdev->le_cnt += conn->sent;
1115 hdev->acl_cnt += conn->sent;
1119 skb_queue_purge(&conn->data_q);
1121 /* Remove the connection from the list and cleanup its remaining
1122 * state. This is a separate function since for some cases like
1123 * BT_CONNECT_SCAN we *only* want the cleanup part without the
1124 * rest of hci_conn_del.
1126 hci_conn_cleanup(conn);
1128 /* Dequeue callbacks using connection pointer as data */
1129 hci_cmd_sync_dequeue(hdev, NULL, conn, NULL);
1132 struct hci_dev *hci_get_route(bdaddr_t *dst, bdaddr_t *src, uint8_t src_type)
1134 int use_src = bacmp(src, BDADDR_ANY);
1135 struct hci_dev *hdev = NULL, *d;
1137 BT_DBG("%pMR -> %pMR", src, dst);
1139 read_lock(&hci_dev_list_lock);
1141 list_for_each_entry(d, &hci_dev_list, list) {
1142 if (!test_bit(HCI_UP, &d->flags) ||
1143 hci_dev_test_flag(d, HCI_USER_CHANNEL) ||
1144 d->dev_type != HCI_PRIMARY)
1148 * No source address - find interface with bdaddr != dst
1149 * Source address - find interface with bdaddr == src
1156 if (src_type == BDADDR_BREDR) {
1157 if (!lmp_bredr_capable(d))
1159 bacpy(&id_addr, &d->bdaddr);
1160 id_addr_type = BDADDR_BREDR;
1162 if (!lmp_le_capable(d))
1165 hci_copy_identity_address(d, &id_addr,
1168 /* Convert from HCI to three-value type */
1169 if (id_addr_type == ADDR_LE_DEV_PUBLIC)
1170 id_addr_type = BDADDR_LE_PUBLIC;
1172 id_addr_type = BDADDR_LE_RANDOM;
1175 if (!bacmp(&id_addr, src) && id_addr_type == src_type) {
1179 if (bacmp(&d->bdaddr, dst)) {
1186 hdev = hci_dev_hold(hdev);
1188 read_unlock(&hci_dev_list_lock);
1191 EXPORT_SYMBOL(hci_get_route);
1193 /* This function requires the caller holds hdev->lock */
1194 static void hci_le_conn_failed(struct hci_conn *conn, u8 status)
1196 struct hci_dev *hdev = conn->hdev;
1198 hci_connect_le_scan_cleanup(conn, status);
1200 /* Enable advertising in case this was a failed connection
1201 * attempt as a peripheral.
1203 hci_enable_advertising(hdev);
1206 /* This function requires the caller holds hdev->lock */
1207 void hci_conn_failed(struct hci_conn *conn, u8 status)
1209 struct hci_dev *hdev = conn->hdev;
1211 bt_dev_dbg(hdev, "status 0x%2.2x", status);
1213 switch (conn->type) {
1215 hci_le_conn_failed(conn, status);
1218 mgmt_connect_failed(hdev, &conn->dst, conn->type,
1219 conn->dst_type, status);
1223 /* In case of BIG/PA sync failed, clear conn flags so that
1224 * the conns will be correctly cleaned up by ISO layer
1226 test_and_clear_bit(HCI_CONN_BIG_SYNC_FAILED, &conn->flags);
1227 test_and_clear_bit(HCI_CONN_PA_SYNC_FAILED, &conn->flags);
1229 conn->state = BT_CLOSED;
1230 hci_connect_cfm(conn, status);
1234 /* This function requires the caller holds hdev->lock */
1235 u8 hci_conn_set_handle(struct hci_conn *conn, u16 handle)
1237 struct hci_dev *hdev = conn->hdev;
1239 bt_dev_dbg(hdev, "hcon %p handle 0x%4.4x", conn, handle);
1241 if (conn->handle == handle)
1244 if (handle > HCI_CONN_HANDLE_MAX) {
1245 bt_dev_err(hdev, "Invalid handle: 0x%4.4x > 0x%4.4x",
1246 handle, HCI_CONN_HANDLE_MAX);
1247 return HCI_ERROR_INVALID_PARAMETERS;
1250 /* If abort_reason has been sent it means the connection is being
1251 * aborted and the handle shall not be changed.
1253 if (conn->abort_reason)
1254 return conn->abort_reason;
1256 if (HCI_CONN_HANDLE_UNSET(conn->handle))
1257 ida_free(&hdev->unset_handle_ida, conn->handle);
1259 conn->handle = handle;
1264 struct hci_conn *hci_connect_le(struct hci_dev *hdev, bdaddr_t *dst,
1265 u8 dst_type, bool dst_resolved, u8 sec_level,
1266 u16 conn_timeout, u8 role, u8 phy, u8 sec_phy)
1268 struct hci_conn *conn;
1269 struct smp_irk *irk;
1272 /* Let's make sure that le is enabled.*/
1273 if (!hci_dev_test_flag(hdev, HCI_LE_ENABLED)) {
1274 if (lmp_le_capable(hdev))
1275 return ERR_PTR(-ECONNREFUSED);
1277 return ERR_PTR(-EOPNOTSUPP);
1280 /* Since the controller supports only one LE connection attempt at a
1281 * time, we return -EBUSY if there is any connection attempt running.
1283 if (hci_lookup_le_connect(hdev))
1284 return ERR_PTR(-EBUSY);
1286 /* If there's already a connection object but it's not in
1287 * scanning state it means it must already be established, in
1288 * which case we can't do anything else except report a failure
1291 conn = hci_conn_hash_lookup_le(hdev, dst, dst_type);
1292 if (conn && !test_bit(HCI_CONN_SCANNING, &conn->flags)) {
1293 return ERR_PTR(-EBUSY);
1296 /* Check if the destination address has been resolved by the controller
1297 * since if it did then the identity address shall be used.
1299 if (!dst_resolved) {
1300 /* When given an identity address with existing identity
1301 * resolving key, the connection needs to be established
1302 * to a resolvable random address.
1304 * Storing the resolvable random address is required here
1305 * to handle connection failures. The address will later
1306 * be resolved back into the original identity address
1307 * from the connect request.
1309 irk = hci_find_irk_by_addr(hdev, dst, dst_type);
1310 if (irk && bacmp(&irk->rpa, BDADDR_ANY)) {
1312 dst_type = ADDR_LE_DEV_RANDOM;
1317 bacpy(&conn->dst, dst);
1319 conn = hci_conn_add_unset(hdev, LE_LINK, dst, role);
1321 return ERR_PTR(-ENOMEM);
1322 hci_conn_hold(conn);
1323 conn->pending_sec_level = sec_level;
1326 conn->dst_type = dst_type;
1327 conn->sec_level = BT_SECURITY_LOW;
1328 conn->conn_timeout = conn_timeout;
1329 conn->le_adv_phy = phy;
1330 conn->le_adv_sec_phy = sec_phy;
1332 err = hci_connect_le_sync(hdev, conn);
1335 return ERR_PTR(err);
1341 static bool is_connected(struct hci_dev *hdev, bdaddr_t *addr, u8 type)
1343 struct hci_conn *conn;
1345 conn = hci_conn_hash_lookup_le(hdev, addr, type);
1349 if (conn->state != BT_CONNECTED)
1355 /* This function requires the caller holds hdev->lock */
1356 static int hci_explicit_conn_params_set(struct hci_dev *hdev,
1357 bdaddr_t *addr, u8 addr_type)
1359 struct hci_conn_params *params;
1361 if (is_connected(hdev, addr, addr_type))
1364 params = hci_conn_params_lookup(hdev, addr, addr_type);
1366 params = hci_conn_params_add(hdev, addr, addr_type);
1370 /* If we created new params, mark them to be deleted in
1371 * hci_connect_le_scan_cleanup. It's different case than
1372 * existing disabled params, those will stay after cleanup.
1374 params->auto_connect = HCI_AUTO_CONN_EXPLICIT;
1377 /* We're trying to connect, so make sure params are at pend_le_conns */
1378 if (params->auto_connect == HCI_AUTO_CONN_DISABLED ||
1379 params->auto_connect == HCI_AUTO_CONN_REPORT ||
1380 params->auto_connect == HCI_AUTO_CONN_EXPLICIT) {
1381 hci_pend_le_list_del_init(params);
1382 hci_pend_le_list_add(params, &hdev->pend_le_conns);
1385 params->explicit_connect = true;
1387 BT_DBG("addr %pMR (type %u) auto_connect %u", addr, addr_type,
1388 params->auto_connect);
1393 static int qos_set_big(struct hci_dev *hdev, struct bt_iso_qos *qos)
1395 struct hci_conn *conn;
1398 /* Allocate a BIG if not set */
1399 if (qos->bcast.big == BT_ISO_QOS_BIG_UNSET) {
1400 for (big = 0x00; big < 0xef; big++) {
1402 conn = hci_conn_hash_lookup_big(hdev, big);
1408 return -EADDRNOTAVAIL;
1411 qos->bcast.big = big;
1417 static int qos_set_bis(struct hci_dev *hdev, struct bt_iso_qos *qos)
1419 struct hci_conn *conn;
1422 /* Allocate BIS if not set */
1423 if (qos->bcast.bis == BT_ISO_QOS_BIS_UNSET) {
1424 if (qos->bcast.big != BT_ISO_QOS_BIG_UNSET) {
1425 conn = hci_conn_hash_lookup_big(hdev, qos->bcast.big);
1428 /* If the BIG handle is already matched to an advertising
1429 * handle, do not allocate a new one.
1431 qos->bcast.bis = conn->iso_qos.bcast.bis;
1436 /* Find an unused adv set to advertise BIS, skip instance 0x00
1437 * since it is reserved as general purpose set.
1439 for (bis = 0x01; bis < hdev->le_num_of_adv_sets;
1442 conn = hci_conn_hash_lookup_bis(hdev, BDADDR_ANY, bis);
1447 if (bis == hdev->le_num_of_adv_sets)
1448 return -EADDRNOTAVAIL;
1451 qos->bcast.bis = bis;
1457 /* This function requires the caller holds hdev->lock */
1458 static struct hci_conn *hci_add_bis(struct hci_dev *hdev, bdaddr_t *dst,
1459 struct bt_iso_qos *qos, __u8 base_len,
1462 struct hci_conn *conn;
1465 /* Let's make sure that le is enabled.*/
1466 if (!hci_dev_test_flag(hdev, HCI_LE_ENABLED)) {
1467 if (lmp_le_capable(hdev))
1468 return ERR_PTR(-ECONNREFUSED);
1469 return ERR_PTR(-EOPNOTSUPP);
1472 err = qos_set_big(hdev, qos);
1474 return ERR_PTR(err);
1476 err = qos_set_bis(hdev, qos);
1478 return ERR_PTR(err);
1480 /* Check if the LE Create BIG command has already been sent */
1481 conn = hci_conn_hash_lookup_per_adv_bis(hdev, dst, qos->bcast.big,
1484 return ERR_PTR(-EADDRINUSE);
1486 /* Check BIS settings against other bound BISes, since all
1487 * BISes in a BIG must have the same value for all parameters
1489 conn = hci_conn_hash_lookup_big(hdev, qos->bcast.big);
1491 if (conn && (memcmp(qos, &conn->iso_qos, sizeof(*qos)) ||
1492 base_len != conn->le_per_adv_data_len ||
1493 memcmp(conn->le_per_adv_data, base, base_len)))
1494 return ERR_PTR(-EADDRINUSE);
1496 conn = hci_conn_add_unset(hdev, ISO_LINK, dst, HCI_ROLE_MASTER);
1498 return ERR_PTR(-ENOMEM);
1500 conn->state = BT_CONNECT;
1502 hci_conn_hold(conn);
1506 /* This function requires the caller holds hdev->lock */
1507 struct hci_conn *hci_connect_le_scan(struct hci_dev *hdev, bdaddr_t *dst,
1508 u8 dst_type, u8 sec_level,
1510 enum conn_reasons conn_reason)
1512 struct hci_conn *conn;
1514 /* Let's make sure that le is enabled.*/
1515 if (!hci_dev_test_flag(hdev, HCI_LE_ENABLED)) {
1516 if (lmp_le_capable(hdev))
1517 return ERR_PTR(-ECONNREFUSED);
1519 return ERR_PTR(-EOPNOTSUPP);
1522 /* Some devices send ATT messages as soon as the physical link is
1523 * established. To be able to handle these ATT messages, the user-
1524 * space first establishes the connection and then starts the pairing
1527 * So if a hci_conn object already exists for the following connection
1528 * attempt, we simply update pending_sec_level and auth_type fields
1529 * and return the object found.
1531 conn = hci_conn_hash_lookup_le(hdev, dst, dst_type);
1533 if (conn->pending_sec_level < sec_level)
1534 conn->pending_sec_level = sec_level;
1538 BT_DBG("requesting refresh of dst_addr");
1540 conn = hci_conn_add_unset(hdev, LE_LINK, dst, HCI_ROLE_MASTER);
1542 return ERR_PTR(-ENOMEM);
1544 if (hci_explicit_conn_params_set(hdev, dst, dst_type) < 0) {
1546 return ERR_PTR(-EBUSY);
1549 conn->state = BT_CONNECT;
1550 set_bit(HCI_CONN_SCANNING, &conn->flags);
1551 conn->dst_type = dst_type;
1552 conn->sec_level = BT_SECURITY_LOW;
1553 conn->pending_sec_level = sec_level;
1554 conn->conn_timeout = conn_timeout;
1555 conn->conn_reason = conn_reason;
1557 hci_update_passive_scan(hdev);
1560 hci_conn_hold(conn);
1564 struct hci_conn *hci_connect_acl(struct hci_dev *hdev, bdaddr_t *dst,
1565 u8 sec_level, u8 auth_type,
1566 enum conn_reasons conn_reason, u16 timeout)
1568 struct hci_conn *acl;
1570 if (!hci_dev_test_flag(hdev, HCI_BREDR_ENABLED)) {
1571 if (lmp_bredr_capable(hdev))
1572 return ERR_PTR(-ECONNREFUSED);
1574 return ERR_PTR(-EOPNOTSUPP);
1577 /* Reject outgoing connection to device with same BD ADDR against
1580 if (!bacmp(&hdev->bdaddr, dst)) {
1581 bt_dev_dbg(hdev, "Reject connection with same BD_ADDR %pMR\n",
1583 return ERR_PTR(-ECONNREFUSED);
1586 acl = hci_conn_hash_lookup_ba(hdev, ACL_LINK, dst);
1588 acl = hci_conn_add_unset(hdev, ACL_LINK, dst, HCI_ROLE_MASTER);
1590 return ERR_PTR(-ENOMEM);
1595 acl->conn_reason = conn_reason;
1596 if (acl->state == BT_OPEN || acl->state == BT_CLOSED) {
1599 acl->sec_level = BT_SECURITY_LOW;
1600 acl->pending_sec_level = sec_level;
1601 acl->auth_type = auth_type;
1602 acl->conn_timeout = timeout;
1604 err = hci_connect_acl_sync(hdev, acl);
1607 return ERR_PTR(err);
1614 static struct hci_link *hci_conn_link(struct hci_conn *parent,
1615 struct hci_conn *conn)
1617 struct hci_dev *hdev = parent->hdev;
1618 struct hci_link *link;
1620 bt_dev_dbg(hdev, "parent %p hcon %p", parent, conn);
1628 link = kzalloc(sizeof(*link), GFP_KERNEL);
1632 link->conn = hci_conn_hold(conn);
1634 conn->parent = hci_conn_get(parent);
1636 /* Use list_add_tail_rcu append to the list */
1637 list_add_tail_rcu(&link->list, &parent->link_list);
1642 struct hci_conn *hci_connect_sco(struct hci_dev *hdev, int type, bdaddr_t *dst,
1643 __u16 setting, struct bt_codec *codec,
1646 struct hci_conn *acl;
1647 struct hci_conn *sco;
1648 struct hci_link *link;
1650 acl = hci_connect_acl(hdev, dst, BT_SECURITY_LOW, HCI_AT_NO_BONDING,
1651 CONN_REASON_SCO_CONNECT, timeout);
1655 sco = hci_conn_hash_lookup_ba(hdev, type, dst);
1657 sco = hci_conn_add_unset(hdev, type, dst, HCI_ROLE_MASTER);
1660 return ERR_PTR(-ENOMEM);
1664 link = hci_conn_link(acl, sco);
1668 return ERR_PTR(-ENOLINK);
1671 sco->setting = setting;
1672 sco->codec = *codec;
1674 if (acl->state == BT_CONNECTED &&
1675 (sco->state == BT_OPEN || sco->state == BT_CLOSED)) {
1676 set_bit(HCI_CONN_POWER_SAVE, &acl->flags);
1677 hci_conn_enter_active_mode(acl, BT_POWER_FORCE_ACTIVE_ON);
1679 if (test_bit(HCI_CONN_MODE_CHANGE_PEND, &acl->flags)) {
1680 /* defer SCO setup until mode change completed */
1681 set_bit(HCI_CONN_SCO_SETUP_PEND, &acl->flags);
1685 hci_sco_setup(acl, 0x00);
1691 static int hci_le_create_big(struct hci_conn *conn, struct bt_iso_qos *qos)
1693 struct hci_dev *hdev = conn->hdev;
1694 struct hci_cp_le_create_big cp;
1695 struct iso_list_data data;
1697 memset(&cp, 0, sizeof(cp));
1699 data.big = qos->bcast.big;
1700 data.bis = qos->bcast.bis;
1703 /* Create a BIS for each bound connection */
1704 hci_conn_hash_list_state(hdev, bis_list, ISO_LINK,
1707 cp.handle = qos->bcast.big;
1708 cp.adv_handle = qos->bcast.bis;
1709 cp.num_bis = data.count;
1710 hci_cpu_to_le24(qos->bcast.out.interval, cp.bis.sdu_interval);
1711 cp.bis.sdu = cpu_to_le16(qos->bcast.out.sdu);
1712 cp.bis.latency = cpu_to_le16(qos->bcast.out.latency);
1713 cp.bis.rtn = qos->bcast.out.rtn;
1714 cp.bis.phy = qos->bcast.out.phy;
1715 cp.bis.packing = qos->bcast.packing;
1716 cp.bis.framing = qos->bcast.framing;
1717 cp.bis.encryption = qos->bcast.encryption;
1718 memcpy(cp.bis.bcode, qos->bcast.bcode, sizeof(cp.bis.bcode));
1720 return hci_send_cmd(hdev, HCI_OP_LE_CREATE_BIG, sizeof(cp), &cp);
1723 static int set_cig_params_sync(struct hci_dev *hdev, void *data)
1725 u8 cig_id = PTR_UINT(data);
1726 struct hci_conn *conn;
1727 struct bt_iso_qos *qos;
1728 struct iso_cig_params pdu;
1731 conn = hci_conn_hash_lookup_cig(hdev, cig_id);
1735 memset(&pdu, 0, sizeof(pdu));
1737 qos = &conn->iso_qos;
1738 pdu.cp.cig_id = cig_id;
1739 hci_cpu_to_le24(qos->ucast.out.interval, pdu.cp.c_interval);
1740 hci_cpu_to_le24(qos->ucast.in.interval, pdu.cp.p_interval);
1741 pdu.cp.sca = qos->ucast.sca;
1742 pdu.cp.packing = qos->ucast.packing;
1743 pdu.cp.framing = qos->ucast.framing;
1744 pdu.cp.c_latency = cpu_to_le16(qos->ucast.out.latency);
1745 pdu.cp.p_latency = cpu_to_le16(qos->ucast.in.latency);
1747 /* Reprogram all CIS(s) with the same CIG, valid range are:
1748 * num_cis: 0x00 to 0x1F
1749 * cis_id: 0x00 to 0xEF
1751 for (cis_id = 0x00; cis_id < 0xf0 &&
1752 pdu.cp.num_cis < ARRAY_SIZE(pdu.cis); cis_id++) {
1753 struct hci_cis_params *cis;
1755 conn = hci_conn_hash_lookup_cis(hdev, NULL, 0, cig_id, cis_id);
1759 qos = &conn->iso_qos;
1761 cis = &pdu.cis[pdu.cp.num_cis++];
1762 cis->cis_id = cis_id;
1763 cis->c_sdu = cpu_to_le16(conn->iso_qos.ucast.out.sdu);
1764 cis->p_sdu = cpu_to_le16(conn->iso_qos.ucast.in.sdu);
1765 cis->c_phy = qos->ucast.out.phy ? qos->ucast.out.phy :
1767 cis->p_phy = qos->ucast.in.phy ? qos->ucast.in.phy :
1769 cis->c_rtn = qos->ucast.out.rtn;
1770 cis->p_rtn = qos->ucast.in.rtn;
1773 if (!pdu.cp.num_cis)
1776 return __hci_cmd_sync_status(hdev, HCI_OP_LE_SET_CIG_PARAMS,
1778 pdu.cp.num_cis * sizeof(pdu.cis[0]), &pdu,
1782 static bool hci_le_set_cig_params(struct hci_conn *conn, struct bt_iso_qos *qos)
1784 struct hci_dev *hdev = conn->hdev;
1785 struct iso_list_data data;
1787 memset(&data, 0, sizeof(data));
1789 /* Allocate first still reconfigurable CIG if not set */
1790 if (qos->ucast.cig == BT_ISO_QOS_CIG_UNSET) {
1791 for (data.cig = 0x00; data.cig < 0xf0; data.cig++) {
1794 hci_conn_hash_list_state(hdev, find_cis, ISO_LINK,
1799 hci_conn_hash_list_state(hdev, find_cis, ISO_LINK,
1800 BT_CONNECTED, &data);
1805 if (data.cig == 0xf0)
1809 qos->ucast.cig = data.cig;
1812 if (qos->ucast.cis != BT_ISO_QOS_CIS_UNSET) {
1813 if (hci_conn_hash_lookup_cis(hdev, NULL, 0, qos->ucast.cig,
1819 /* Allocate first available CIS if not set */
1820 for (data.cig = qos->ucast.cig, data.cis = 0x00; data.cis < 0xf0;
1822 if (!hci_conn_hash_lookup_cis(hdev, NULL, 0, data.cig,
1825 qos->ucast.cis = data.cis;
1830 if (qos->ucast.cis == BT_ISO_QOS_CIS_UNSET)
1834 if (hci_cmd_sync_queue(hdev, set_cig_params_sync,
1835 UINT_PTR(qos->ucast.cig), NULL) < 0)
1841 struct hci_conn *hci_bind_cis(struct hci_dev *hdev, bdaddr_t *dst,
1842 __u8 dst_type, struct bt_iso_qos *qos)
1844 struct hci_conn *cis;
1846 cis = hci_conn_hash_lookup_cis(hdev, dst, dst_type, qos->ucast.cig,
1849 cis = hci_conn_add_unset(hdev, ISO_LINK, dst, HCI_ROLE_MASTER);
1851 return ERR_PTR(-ENOMEM);
1852 cis->cleanup = cis_cleanup;
1853 cis->dst_type = dst_type;
1854 cis->iso_qos.ucast.cig = BT_ISO_QOS_CIG_UNSET;
1855 cis->iso_qos.ucast.cis = BT_ISO_QOS_CIS_UNSET;
1858 if (cis->state == BT_CONNECTED)
1861 /* Check if CIS has been set and the settings matches */
1862 if (cis->state == BT_BOUND &&
1863 !memcmp(&cis->iso_qos, qos, sizeof(*qos)))
1866 /* Update LINK PHYs according to QoS preference */
1867 cis->le_tx_phy = qos->ucast.out.phy;
1868 cis->le_rx_phy = qos->ucast.in.phy;
1870 /* If output interval is not set use the input interval as it cannot be
1873 if (!qos->ucast.out.interval)
1874 qos->ucast.out.interval = qos->ucast.in.interval;
1876 /* If input interval is not set use the output interval as it cannot be
1879 if (!qos->ucast.in.interval)
1880 qos->ucast.in.interval = qos->ucast.out.interval;
1882 /* If output latency is not set use the input latency as it cannot be
1885 if (!qos->ucast.out.latency)
1886 qos->ucast.out.latency = qos->ucast.in.latency;
1888 /* If input latency is not set use the output latency as it cannot be
1891 if (!qos->ucast.in.latency)
1892 qos->ucast.in.latency = qos->ucast.out.latency;
1894 if (!hci_le_set_cig_params(cis, qos)) {
1896 return ERR_PTR(-EINVAL);
1901 cis->iso_qos = *qos;
1902 cis->state = BT_BOUND;
1907 bool hci_iso_setup_path(struct hci_conn *conn)
1909 struct hci_dev *hdev = conn->hdev;
1910 struct hci_cp_le_setup_iso_path cmd;
1912 memset(&cmd, 0, sizeof(cmd));
1914 if (conn->iso_qos.ucast.out.sdu) {
1915 cmd.handle = cpu_to_le16(conn->handle);
1916 cmd.direction = 0x00; /* Input (Host to Controller) */
1917 cmd.path = 0x00; /* HCI path if enabled */
1918 cmd.codec = 0x03; /* Transparent Data */
1920 if (hci_send_cmd(hdev, HCI_OP_LE_SETUP_ISO_PATH, sizeof(cmd),
1925 if (conn->iso_qos.ucast.in.sdu) {
1926 cmd.handle = cpu_to_le16(conn->handle);
1927 cmd.direction = 0x01; /* Output (Controller to Host) */
1928 cmd.path = 0x00; /* HCI path if enabled */
1929 cmd.codec = 0x03; /* Transparent Data */
1931 if (hci_send_cmd(hdev, HCI_OP_LE_SETUP_ISO_PATH, sizeof(cmd),
1939 int hci_conn_check_create_cis(struct hci_conn *conn)
1941 if (conn->type != ISO_LINK || !bacmp(&conn->dst, BDADDR_ANY))
1944 if (!conn->parent || conn->parent->state != BT_CONNECTED ||
1945 conn->state != BT_CONNECT || HCI_CONN_HANDLE_UNSET(conn->handle))
1951 static int hci_create_cis_sync(struct hci_dev *hdev, void *data)
1953 return hci_le_create_cis_sync(hdev);
1956 int hci_le_create_cis_pending(struct hci_dev *hdev)
1958 struct hci_conn *conn;
1959 bool pending = false;
1963 list_for_each_entry_rcu(conn, &hdev->conn_hash.list, list) {
1964 if (test_bit(HCI_CONN_CREATE_CIS, &conn->flags)) {
1969 if (!hci_conn_check_create_cis(conn))
1978 /* Queue Create CIS */
1979 return hci_cmd_sync_queue(hdev, hci_create_cis_sync, NULL, NULL);
1982 static void hci_iso_qos_setup(struct hci_dev *hdev, struct hci_conn *conn,
1983 struct bt_iso_io_qos *qos, __u8 phy)
1985 /* Only set MTU if PHY is enabled */
1986 if (!qos->sdu && qos->phy) {
1987 if (hdev->iso_mtu > 0)
1988 qos->sdu = hdev->iso_mtu;
1989 else if (hdev->le_mtu > 0)
1990 qos->sdu = hdev->le_mtu;
1992 qos->sdu = hdev->acl_mtu;
1995 /* Use the same PHY as ACL if set to any */
1996 if (qos->phy == BT_ISO_PHY_ANY)
1999 /* Use LE ACL connection interval if not set */
2001 /* ACL interval unit in 1.25 ms to us */
2002 qos->interval = conn->le_conn_interval * 1250;
2004 /* Use LE ACL connection latency if not set */
2006 qos->latency = conn->le_conn_latency;
2009 static int create_big_sync(struct hci_dev *hdev, void *data)
2011 struct hci_conn *conn = data;
2012 struct bt_iso_qos *qos = &conn->iso_qos;
2013 u16 interval, sync_interval = 0;
2017 if (qos->bcast.out.phy == 0x02)
2018 flags |= MGMT_ADV_FLAG_SEC_2M;
2020 /* Align intervals */
2021 interval = (qos->bcast.out.interval / 1250) * qos->bcast.sync_factor;
2024 sync_interval = interval * 4;
2026 err = hci_start_per_adv_sync(hdev, qos->bcast.bis, conn->le_per_adv_data_len,
2027 conn->le_per_adv_data, flags, interval,
2028 interval, sync_interval);
2032 return hci_le_create_big(conn, &conn->iso_qos);
2035 static void create_pa_complete(struct hci_dev *hdev, void *data, int err)
2037 struct hci_cp_le_pa_create_sync *cp = data;
2039 bt_dev_dbg(hdev, "");
2042 bt_dev_err(hdev, "Unable to create PA: %d", err);
2047 static int create_pa_sync(struct hci_dev *hdev, void *data)
2049 struct hci_cp_le_pa_create_sync *cp = data;
2052 err = __hci_cmd_sync_status(hdev, HCI_OP_LE_PA_CREATE_SYNC,
2053 sizeof(*cp), cp, HCI_CMD_TIMEOUT);
2055 hci_dev_clear_flag(hdev, HCI_PA_SYNC);
2059 return hci_update_passive_scan_sync(hdev);
2062 int hci_pa_create_sync(struct hci_dev *hdev, bdaddr_t *dst, __u8 dst_type,
2063 __u8 sid, struct bt_iso_qos *qos)
2065 struct hci_cp_le_pa_create_sync *cp;
2067 if (hci_dev_test_and_set_flag(hdev, HCI_PA_SYNC))
2070 cp = kzalloc(sizeof(*cp), GFP_KERNEL);
2072 hci_dev_clear_flag(hdev, HCI_PA_SYNC);
2076 cp->options = qos->bcast.options;
2078 cp->addr_type = dst_type;
2079 bacpy(&cp->addr, dst);
2080 cp->skip = cpu_to_le16(qos->bcast.skip);
2081 cp->sync_timeout = cpu_to_le16(qos->bcast.sync_timeout);
2082 cp->sync_cte_type = qos->bcast.sync_cte_type;
2084 /* Queue start pa_create_sync and scan */
2085 return hci_cmd_sync_queue(hdev, create_pa_sync, cp, create_pa_complete);
2088 int hci_le_big_create_sync(struct hci_dev *hdev, struct hci_conn *hcon,
2089 struct bt_iso_qos *qos,
2090 __u16 sync_handle, __u8 num_bis, __u8 bis[])
2093 struct hci_cp_le_big_create_sync cp;
2098 if (num_bis < 0x01 || num_bis > sizeof(pdu.bis))
2101 err = qos_set_big(hdev, qos);
2106 hcon->iso_qos.bcast.big = qos->bcast.big;
2108 memset(&pdu, 0, sizeof(pdu));
2109 pdu.cp.handle = qos->bcast.big;
2110 pdu.cp.sync_handle = cpu_to_le16(sync_handle);
2111 pdu.cp.encryption = qos->bcast.encryption;
2112 memcpy(pdu.cp.bcode, qos->bcast.bcode, sizeof(pdu.cp.bcode));
2113 pdu.cp.mse = qos->bcast.mse;
2114 pdu.cp.timeout = cpu_to_le16(qos->bcast.timeout);
2115 pdu.cp.num_bis = num_bis;
2116 memcpy(pdu.bis, bis, num_bis);
2118 return hci_send_cmd(hdev, HCI_OP_LE_BIG_CREATE_SYNC,
2119 sizeof(pdu.cp) + num_bis, &pdu);
2122 static void create_big_complete(struct hci_dev *hdev, void *data, int err)
2124 struct hci_conn *conn = data;
2126 bt_dev_dbg(hdev, "conn %p", conn);
2129 bt_dev_err(hdev, "Unable to create BIG: %d", err);
2130 hci_connect_cfm(conn, err);
2135 struct hci_conn *hci_bind_bis(struct hci_dev *hdev, bdaddr_t *dst,
2136 struct bt_iso_qos *qos,
2137 __u8 base_len, __u8 *base)
2139 struct hci_conn *conn;
2140 struct hci_conn *parent;
2141 __u8 eir[HCI_MAX_PER_AD_LENGTH];
2142 struct hci_link *link;
2144 /* Look for any BIS that is open for rebinding */
2145 conn = hci_conn_hash_lookup_big_state(hdev, qos->bcast.big, BT_OPEN);
2147 memcpy(qos, &conn->iso_qos, sizeof(*qos));
2148 conn->state = BT_CONNECTED;
2152 if (base_len && base)
2153 base_len = eir_append_service_data(eir, 0, 0x1851,
2156 /* We need hci_conn object using the BDADDR_ANY as dst */
2157 conn = hci_add_bis(hdev, dst, qos, base_len, eir);
2161 /* Update LINK PHYs according to QoS preference */
2162 conn->le_tx_phy = qos->bcast.out.phy;
2163 conn->le_tx_phy = qos->bcast.out.phy;
2165 /* Add Basic Announcement into Peridic Adv Data if BASE is set */
2166 if (base_len && base) {
2167 memcpy(conn->le_per_adv_data, eir, sizeof(eir));
2168 conn->le_per_adv_data_len = base_len;
2171 hci_iso_qos_setup(hdev, conn, &qos->bcast.out,
2172 conn->le_tx_phy ? conn->le_tx_phy :
2173 hdev->le_tx_def_phys);
2175 conn->iso_qos = *qos;
2176 conn->state = BT_BOUND;
2178 /* Link BISes together */
2179 parent = hci_conn_hash_lookup_big(hdev,
2180 conn->iso_qos.bcast.big);
2181 if (parent && parent != conn) {
2182 link = hci_conn_link(parent, conn);
2184 hci_conn_drop(conn);
2185 return ERR_PTR(-ENOLINK);
2188 /* Link takes the refcount */
2189 hci_conn_drop(conn);
2195 static void bis_mark_per_adv(struct hci_conn *conn, void *data)
2197 struct iso_list_data *d = data;
2199 /* Skip if not broadcast/ANY address */
2200 if (bacmp(&conn->dst, BDADDR_ANY))
2203 if (d->big != conn->iso_qos.bcast.big ||
2204 d->bis == BT_ISO_QOS_BIS_UNSET ||
2205 d->bis != conn->iso_qos.bcast.bis)
2208 set_bit(HCI_CONN_PER_ADV, &conn->flags);
2211 struct hci_conn *hci_connect_bis(struct hci_dev *hdev, bdaddr_t *dst,
2212 __u8 dst_type, struct bt_iso_qos *qos,
2213 __u8 base_len, __u8 *base)
2215 struct hci_conn *conn;
2217 struct iso_list_data data;
2219 conn = hci_bind_bis(hdev, dst, qos, base_len, base);
2223 if (conn->state == BT_CONNECTED)
2226 data.big = qos->bcast.big;
2227 data.bis = qos->bcast.bis;
2229 /* Set HCI_CONN_PER_ADV for all bound connections, to mark that
2230 * the start periodic advertising and create BIG commands have
2233 hci_conn_hash_list_state(hdev, bis_mark_per_adv, ISO_LINK,
2236 /* Queue start periodic advertising and create BIG */
2237 err = hci_cmd_sync_queue(hdev, create_big_sync, conn,
2238 create_big_complete);
2240 hci_conn_drop(conn);
2241 return ERR_PTR(err);
2247 struct hci_conn *hci_connect_cis(struct hci_dev *hdev, bdaddr_t *dst,
2248 __u8 dst_type, struct bt_iso_qos *qos)
2250 struct hci_conn *le;
2251 struct hci_conn *cis;
2252 struct hci_link *link;
2254 if (hci_dev_test_flag(hdev, HCI_ADVERTISING))
2255 le = hci_connect_le(hdev, dst, dst_type, false,
2257 HCI_LE_CONN_TIMEOUT,
2258 HCI_ROLE_SLAVE, 0, 0);
2260 le = hci_connect_le_scan(hdev, dst, dst_type,
2262 HCI_LE_CONN_TIMEOUT,
2263 CONN_REASON_ISO_CONNECT);
2267 hci_iso_qos_setup(hdev, le, &qos->ucast.out,
2268 le->le_tx_phy ? le->le_tx_phy : hdev->le_tx_def_phys);
2269 hci_iso_qos_setup(hdev, le, &qos->ucast.in,
2270 le->le_rx_phy ? le->le_rx_phy : hdev->le_rx_def_phys);
2272 cis = hci_bind_cis(hdev, dst, dst_type, qos);
2278 link = hci_conn_link(le, cis);
2282 return ERR_PTR(-ENOLINK);
2285 /* Link takes the refcount */
2288 cis->state = BT_CONNECT;
2290 hci_le_create_cis_pending(hdev);
2295 /* Check link security requirement */
2296 int hci_conn_check_link_mode(struct hci_conn *conn)
2298 BT_DBG("hcon %p", conn);
2300 /* In Secure Connections Only mode, it is required that Secure
2301 * Connections is used and the link is encrypted with AES-CCM
2302 * using a P-256 authenticated combination key.
2304 if (hci_dev_test_flag(conn->hdev, HCI_SC_ONLY)) {
2305 if (!hci_conn_sc_enabled(conn) ||
2306 !test_bit(HCI_CONN_AES_CCM, &conn->flags) ||
2307 conn->key_type != HCI_LK_AUTH_COMBINATION_P256)
2311 /* AES encryption is required for Level 4:
2313 * BLUETOOTH CORE SPECIFICATION Version 5.2 | Vol 3, Part C
2316 * 128-bit equivalent strength for link and encryption keys
2317 * required using FIPS approved algorithms (E0 not allowed,
2318 * SAFER+ not allowed, and P-192 not allowed; encryption key
2321 if (conn->sec_level == BT_SECURITY_FIPS &&
2322 !test_bit(HCI_CONN_AES_CCM, &conn->flags)) {
2323 bt_dev_err(conn->hdev,
2324 "Invalid security: Missing AES-CCM usage");
2328 if (hci_conn_ssp_enabled(conn) &&
2329 !test_bit(HCI_CONN_ENCRYPT, &conn->flags))
2335 /* Authenticate remote device */
2336 static int hci_conn_auth(struct hci_conn *conn, __u8 sec_level, __u8 auth_type)
2338 BT_DBG("hcon %p", conn);
2340 if (conn->pending_sec_level > sec_level)
2341 sec_level = conn->pending_sec_level;
2343 if (sec_level > conn->sec_level)
2344 conn->pending_sec_level = sec_level;
2345 else if (test_bit(HCI_CONN_AUTH, &conn->flags))
2348 /* Make sure we preserve an existing MITM requirement*/
2349 auth_type |= (conn->auth_type & 0x01);
2351 conn->auth_type = auth_type;
2353 if (!test_and_set_bit(HCI_CONN_AUTH_PEND, &conn->flags)) {
2354 struct hci_cp_auth_requested cp;
2356 cp.handle = cpu_to_le16(conn->handle);
2357 hci_send_cmd(conn->hdev, HCI_OP_AUTH_REQUESTED,
2360 /* Set the ENCRYPT_PEND to trigger encryption after
2363 if (!test_bit(HCI_CONN_ENCRYPT, &conn->flags))
2364 set_bit(HCI_CONN_ENCRYPT_PEND, &conn->flags);
2370 /* Encrypt the link */
2371 static void hci_conn_encrypt(struct hci_conn *conn)
2373 BT_DBG("hcon %p", conn);
2375 if (!test_and_set_bit(HCI_CONN_ENCRYPT_PEND, &conn->flags)) {
2376 struct hci_cp_set_conn_encrypt cp;
2377 cp.handle = cpu_to_le16(conn->handle);
2379 hci_send_cmd(conn->hdev, HCI_OP_SET_CONN_ENCRYPT, sizeof(cp),
2384 /* Enable security */
2385 int hci_conn_security(struct hci_conn *conn, __u8 sec_level, __u8 auth_type,
2388 BT_DBG("hcon %p", conn);
2390 if (conn->type == LE_LINK)
2391 return smp_conn_security(conn, sec_level);
2393 /* For sdp we don't need the link key. */
2394 if (sec_level == BT_SECURITY_SDP)
2397 /* For non 2.1 devices and low security level we don't need the link
2399 if (sec_level == BT_SECURITY_LOW && !hci_conn_ssp_enabled(conn))
2402 /* For other security levels we need the link key. */
2403 if (!test_bit(HCI_CONN_AUTH, &conn->flags))
2406 switch (conn->key_type) {
2407 case HCI_LK_AUTH_COMBINATION_P256:
2408 /* An authenticated FIPS approved combination key has
2409 * sufficient security for security level 4 or lower.
2411 if (sec_level <= BT_SECURITY_FIPS)
2414 case HCI_LK_AUTH_COMBINATION_P192:
2415 /* An authenticated combination key has sufficient security for
2416 * security level 3 or lower.
2418 if (sec_level <= BT_SECURITY_HIGH)
2421 case HCI_LK_UNAUTH_COMBINATION_P192:
2422 case HCI_LK_UNAUTH_COMBINATION_P256:
2423 /* An unauthenticated combination key has sufficient security
2424 * for security level 2 or lower.
2426 if (sec_level <= BT_SECURITY_MEDIUM)
2429 case HCI_LK_COMBINATION:
2430 /* A combination key has always sufficient security for the
2431 * security levels 2 or lower. High security level requires the
2432 * combination key is generated using maximum PIN code length
2433 * (16). For pre 2.1 units.
2435 if (sec_level <= BT_SECURITY_MEDIUM || conn->pin_length == 16)
2443 if (test_bit(HCI_CONN_ENCRYPT_PEND, &conn->flags))
2447 set_bit(HCI_CONN_AUTH_INITIATOR, &conn->flags);
2449 if (!hci_conn_auth(conn, sec_level, auth_type))
2453 if (test_bit(HCI_CONN_ENCRYPT, &conn->flags)) {
2454 /* Ensure that the encryption key size has been read,
2455 * otherwise stall the upper layer responses.
2457 if (!conn->enc_key_size)
2460 /* Nothing else needed, all requirements are met */
2464 hci_conn_encrypt(conn);
2467 EXPORT_SYMBOL(hci_conn_security);
2469 /* Check secure link requirement */
2470 int hci_conn_check_secure(struct hci_conn *conn, __u8 sec_level)
2472 BT_DBG("hcon %p", conn);
2474 /* Accept if non-secure or higher security level is required */
2475 if (sec_level != BT_SECURITY_HIGH && sec_level != BT_SECURITY_FIPS)
2478 /* Accept if secure or higher security level is already present */
2479 if (conn->sec_level == BT_SECURITY_HIGH ||
2480 conn->sec_level == BT_SECURITY_FIPS)
2483 /* Reject not secure link */
2486 EXPORT_SYMBOL(hci_conn_check_secure);
2489 int hci_conn_switch_role(struct hci_conn *conn, __u8 role)
2491 BT_DBG("hcon %p", conn);
2493 if (role == conn->role)
2496 if (!test_and_set_bit(HCI_CONN_RSWITCH_PEND, &conn->flags)) {
2497 struct hci_cp_switch_role cp;
2498 bacpy(&cp.bdaddr, &conn->dst);
2500 hci_send_cmd(conn->hdev, HCI_OP_SWITCH_ROLE, sizeof(cp), &cp);
2505 EXPORT_SYMBOL(hci_conn_switch_role);
2507 /* Enter active mode */
2508 void hci_conn_enter_active_mode(struct hci_conn *conn, __u8 force_active)
2510 struct hci_dev *hdev = conn->hdev;
2512 BT_DBG("hcon %p mode %d", conn, conn->mode);
2514 if (conn->mode != HCI_CM_SNIFF)
2517 if (!test_bit(HCI_CONN_POWER_SAVE, &conn->flags) && !force_active)
2520 if (!test_and_set_bit(HCI_CONN_MODE_CHANGE_PEND, &conn->flags)) {
2521 struct hci_cp_exit_sniff_mode cp;
2522 cp.handle = cpu_to_le16(conn->handle);
2523 hci_send_cmd(hdev, HCI_OP_EXIT_SNIFF_MODE, sizeof(cp), &cp);
2527 if (hdev->idle_timeout > 0)
2528 queue_delayed_work(hdev->workqueue, &conn->idle_work,
2529 msecs_to_jiffies(hdev->idle_timeout));
2532 /* Drop all connection on the device */
2533 void hci_conn_hash_flush(struct hci_dev *hdev)
2535 struct list_head *head = &hdev->conn_hash.list;
2536 struct hci_conn *conn;
2538 BT_DBG("hdev %s", hdev->name);
2540 /* We should not traverse the list here, because hci_conn_del
2541 * can remove extra links, which may cause the list traversal
2542 * to hit items that have already been released.
2544 while ((conn = list_first_entry_or_null(head,
2547 conn->state = BT_CLOSED;
2548 hci_disconn_cfm(conn, HCI_ERROR_LOCAL_HOST_TERM);
2553 static u32 get_link_mode(struct hci_conn *conn)
2557 if (conn->role == HCI_ROLE_MASTER)
2558 link_mode |= HCI_LM_MASTER;
2560 if (test_bit(HCI_CONN_ENCRYPT, &conn->flags))
2561 link_mode |= HCI_LM_ENCRYPT;
2563 if (test_bit(HCI_CONN_AUTH, &conn->flags))
2564 link_mode |= HCI_LM_AUTH;
2566 if (test_bit(HCI_CONN_SECURE, &conn->flags))
2567 link_mode |= HCI_LM_SECURE;
2569 if (test_bit(HCI_CONN_FIPS, &conn->flags))
2570 link_mode |= HCI_LM_FIPS;
2575 int hci_get_conn_list(void __user *arg)
2578 struct hci_conn_list_req req, *cl;
2579 struct hci_conn_info *ci;
2580 struct hci_dev *hdev;
2581 int n = 0, size, err;
2583 if (copy_from_user(&req, arg, sizeof(req)))
2586 if (!req.conn_num || req.conn_num > (PAGE_SIZE * 2) / sizeof(*ci))
2589 size = sizeof(req) + req.conn_num * sizeof(*ci);
2591 cl = kmalloc(size, GFP_KERNEL);
2595 hdev = hci_dev_get(req.dev_id);
2604 list_for_each_entry(c, &hdev->conn_hash.list, list) {
2605 bacpy(&(ci + n)->bdaddr, &c->dst);
2606 (ci + n)->handle = c->handle;
2607 (ci + n)->type = c->type;
2608 (ci + n)->out = c->out;
2609 (ci + n)->state = c->state;
2610 (ci + n)->link_mode = get_link_mode(c);
2611 if (++n >= req.conn_num)
2614 hci_dev_unlock(hdev);
2616 cl->dev_id = hdev->id;
2618 size = sizeof(req) + n * sizeof(*ci);
2622 err = copy_to_user(arg, cl, size);
2625 return err ? -EFAULT : 0;
2628 int hci_get_conn_info(struct hci_dev *hdev, void __user *arg)
2630 struct hci_conn_info_req req;
2631 struct hci_conn_info ci;
2632 struct hci_conn *conn;
2633 char __user *ptr = arg + sizeof(req);
2635 if (copy_from_user(&req, arg, sizeof(req)))
2639 conn = hci_conn_hash_lookup_ba(hdev, req.type, &req.bdaddr);
2641 bacpy(&ci.bdaddr, &conn->dst);
2642 ci.handle = conn->handle;
2643 ci.type = conn->type;
2645 ci.state = conn->state;
2646 ci.link_mode = get_link_mode(conn);
2648 hci_dev_unlock(hdev);
2653 return copy_to_user(ptr, &ci, sizeof(ci)) ? -EFAULT : 0;
2656 int hci_get_auth_info(struct hci_dev *hdev, void __user *arg)
2658 struct hci_auth_info_req req;
2659 struct hci_conn *conn;
2661 if (copy_from_user(&req, arg, sizeof(req)))
2665 conn = hci_conn_hash_lookup_ba(hdev, ACL_LINK, &req.bdaddr);
2667 req.type = conn->auth_type;
2668 hci_dev_unlock(hdev);
2673 return copy_to_user(arg, &req, sizeof(req)) ? -EFAULT : 0;
2676 struct hci_chan *hci_chan_create(struct hci_conn *conn)
2678 struct hci_dev *hdev = conn->hdev;
2679 struct hci_chan *chan;
2681 BT_DBG("%s hcon %p", hdev->name, conn);
2683 if (test_bit(HCI_CONN_DROP, &conn->flags)) {
2684 BT_DBG("Refusing to create new hci_chan");
2688 chan = kzalloc(sizeof(*chan), GFP_KERNEL);
2692 chan->conn = hci_conn_get(conn);
2693 skb_queue_head_init(&chan->data_q);
2694 chan->state = BT_CONNECTED;
2696 list_add_rcu(&chan->list, &conn->chan_list);
2701 void hci_chan_del(struct hci_chan *chan)
2703 struct hci_conn *conn = chan->conn;
2704 struct hci_dev *hdev = conn->hdev;
2706 BT_DBG("%s hcon %p chan %p", hdev->name, conn, chan);
2708 list_del_rcu(&chan->list);
2712 /* Prevent new hci_chan's to be created for this hci_conn */
2713 set_bit(HCI_CONN_DROP, &conn->flags);
2717 skb_queue_purge(&chan->data_q);
2721 void hci_chan_list_flush(struct hci_conn *conn)
2723 struct hci_chan *chan, *n;
2725 BT_DBG("hcon %p", conn);
2727 list_for_each_entry_safe(chan, n, &conn->chan_list, list)
2731 static struct hci_chan *__hci_chan_lookup_handle(struct hci_conn *hcon,
2734 struct hci_chan *hchan;
2736 list_for_each_entry(hchan, &hcon->chan_list, list) {
2737 if (hchan->handle == handle)
2744 struct hci_chan *hci_chan_lookup_handle(struct hci_dev *hdev, __u16 handle)
2746 struct hci_conn_hash *h = &hdev->conn_hash;
2747 struct hci_conn *hcon;
2748 struct hci_chan *hchan = NULL;
2752 list_for_each_entry_rcu(hcon, &h->list, list) {
2753 hchan = __hci_chan_lookup_handle(hcon, handle);
2763 u32 hci_conn_get_phy(struct hci_conn *conn)
2767 /* BLUETOOTH CORE SPECIFICATION Version 5.2 | Vol 2, Part B page 471:
2768 * Table 6.2: Packets defined for synchronous, asynchronous, and
2769 * CPB logical transport types.
2771 switch (conn->type) {
2773 /* SCO logical transport (1 Mb/s):
2774 * HV1, HV2, HV3 and DV.
2776 phys |= BT_PHY_BR_1M_1SLOT;
2781 /* ACL logical transport (1 Mb/s) ptt=0:
2782 * DH1, DM3, DH3, DM5 and DH5.
2784 phys |= BT_PHY_BR_1M_1SLOT;
2786 if (conn->pkt_type & (HCI_DM3 | HCI_DH3))
2787 phys |= BT_PHY_BR_1M_3SLOT;
2789 if (conn->pkt_type & (HCI_DM5 | HCI_DH5))
2790 phys |= BT_PHY_BR_1M_5SLOT;
2792 /* ACL logical transport (2 Mb/s) ptt=1:
2793 * 2-DH1, 2-DH3 and 2-DH5.
2795 if (!(conn->pkt_type & HCI_2DH1))
2796 phys |= BT_PHY_EDR_2M_1SLOT;
2798 if (!(conn->pkt_type & HCI_2DH3))
2799 phys |= BT_PHY_EDR_2M_3SLOT;
2801 if (!(conn->pkt_type & HCI_2DH5))
2802 phys |= BT_PHY_EDR_2M_5SLOT;
2804 /* ACL logical transport (3 Mb/s) ptt=1:
2805 * 3-DH1, 3-DH3 and 3-DH5.
2807 if (!(conn->pkt_type & HCI_3DH1))
2808 phys |= BT_PHY_EDR_3M_1SLOT;
2810 if (!(conn->pkt_type & HCI_3DH3))
2811 phys |= BT_PHY_EDR_3M_3SLOT;
2813 if (!(conn->pkt_type & HCI_3DH5))
2814 phys |= BT_PHY_EDR_3M_5SLOT;
2819 /* eSCO logical transport (1 Mb/s): EV3, EV4 and EV5 */
2820 phys |= BT_PHY_BR_1M_1SLOT;
2822 if (!(conn->pkt_type & (ESCO_EV4 | ESCO_EV5)))
2823 phys |= BT_PHY_BR_1M_3SLOT;
2825 /* eSCO logical transport (2 Mb/s): 2-EV3, 2-EV5 */
2826 if (!(conn->pkt_type & ESCO_2EV3))
2827 phys |= BT_PHY_EDR_2M_1SLOT;
2829 if (!(conn->pkt_type & ESCO_2EV5))
2830 phys |= BT_PHY_EDR_2M_3SLOT;
2832 /* eSCO logical transport (3 Mb/s): 3-EV3, 3-EV5 */
2833 if (!(conn->pkt_type & ESCO_3EV3))
2834 phys |= BT_PHY_EDR_3M_1SLOT;
2836 if (!(conn->pkt_type & ESCO_3EV5))
2837 phys |= BT_PHY_EDR_3M_3SLOT;
2842 if (conn->le_tx_phy & HCI_LE_SET_PHY_1M)
2843 phys |= BT_PHY_LE_1M_TX;
2845 if (conn->le_rx_phy & HCI_LE_SET_PHY_1M)
2846 phys |= BT_PHY_LE_1M_RX;
2848 if (conn->le_tx_phy & HCI_LE_SET_PHY_2M)
2849 phys |= BT_PHY_LE_2M_TX;
2851 if (conn->le_rx_phy & HCI_LE_SET_PHY_2M)
2852 phys |= BT_PHY_LE_2M_RX;
2854 if (conn->le_tx_phy & HCI_LE_SET_PHY_CODED)
2855 phys |= BT_PHY_LE_CODED_TX;
2857 if (conn->le_rx_phy & HCI_LE_SET_PHY_CODED)
2858 phys |= BT_PHY_LE_CODED_RX;
2866 static int abort_conn_sync(struct hci_dev *hdev, void *data)
2868 struct hci_conn *conn = data;
2870 if (!hci_conn_valid(hdev, conn))
2873 return hci_abort_conn_sync(hdev, conn, conn->abort_reason);
2876 int hci_abort_conn(struct hci_conn *conn, u8 reason)
2878 struct hci_dev *hdev = conn->hdev;
2880 /* If abort_reason has already been set it means the connection is
2881 * already being aborted so don't attempt to overwrite it.
2883 if (conn->abort_reason)
2886 bt_dev_dbg(hdev, "handle 0x%2.2x reason 0x%2.2x", conn->handle, reason);
2888 conn->abort_reason = reason;
2890 /* If the connection is pending check the command opcode since that
2891 * might be blocking on hci_cmd_sync_work while waiting its respective
2892 * event so we need to hci_cmd_sync_cancel to cancel it.
2894 * hci_connect_le serializes the connection attempts so only one
2895 * connection can be in BT_CONNECT at time.
2897 if (conn->state == BT_CONNECT && hdev->req_status == HCI_REQ_PEND) {
2898 switch (hci_skb_event(hdev->sent_cmd)) {
2899 case HCI_EV_CONN_COMPLETE:
2900 case HCI_EV_LE_CONN_COMPLETE:
2901 case HCI_EV_LE_ENHANCED_CONN_COMPLETE:
2902 case HCI_EVT_LE_CIS_ESTABLISHED:
2903 hci_cmd_sync_cancel(hdev, ECANCELED);
2906 /* Cancel connect attempt if still queued/pending */
2907 } else if (!hci_cancel_connect_sync(hdev, conn)) {
2911 return hci_cmd_sync_queue_once(hdev, abort_conn_sync, conn, NULL);