2849 lines
69 KiB
C
2849 lines
69 KiB
C
/*
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BlueZ - Bluetooth protocol stack for Linux
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Copyright (c) 2000-2001, 2010, Code Aurora Forum. All rights reserved.
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Written 2000,2001 by Maxim Krasnyansky <maxk@qualcomm.com>
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License version 2 as
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published by the Free Software Foundation;
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THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
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OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT OF THIRD PARTY RIGHTS.
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IN NO EVENT SHALL THE COPYRIGHT HOLDER(S) AND AUTHOR(S) BE LIABLE FOR ANY
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CLAIM, OR ANY SPECIAL INDIRECT OR CONSEQUENTIAL DAMAGES, OR ANY DAMAGES
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WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
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ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
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OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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ALL LIABILITY, INCLUDING LIABILITY FOR INFRINGEMENT OF ANY PATENTS,
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COPYRIGHTS, TRADEMARKS OR OTHER RIGHTS, RELATING TO USE OF THIS
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SOFTWARE IS DISCLAIMED.
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*/
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/* Bluetooth HCI connection handling. */
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#include <linux/export.h>
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#include <linux/debugfs.h>
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#include <net/bluetooth/bluetooth.h>
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#include <net/bluetooth/hci_core.h>
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#include <net/bluetooth/l2cap.h>
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#include <net/bluetooth/iso.h>
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#include <net/bluetooth/mgmt.h>
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#include "hci_request.h"
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#include "smp.h"
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#include "a2mp.h"
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#include "eir.h"
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struct sco_param {
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u16 pkt_type;
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u16 max_latency;
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u8 retrans_effort;
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};
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struct conn_handle_t {
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struct hci_conn *conn;
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__u16 handle;
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};
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static const struct sco_param esco_param_cvsd[] = {
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{ EDR_ESCO_MASK & ~ESCO_2EV3, 0x000a, 0x01 }, /* S3 */
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{ EDR_ESCO_MASK & ~ESCO_2EV3, 0x0007, 0x01 }, /* S2 */
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{ EDR_ESCO_MASK | ESCO_EV3, 0x0007, 0x01 }, /* S1 */
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{ EDR_ESCO_MASK | ESCO_HV3, 0xffff, 0x01 }, /* D1 */
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{ EDR_ESCO_MASK | ESCO_HV1, 0xffff, 0x01 }, /* D0 */
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};
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static const struct sco_param sco_param_cvsd[] = {
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{ EDR_ESCO_MASK | ESCO_HV3, 0xffff, 0xff }, /* D1 */
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{ EDR_ESCO_MASK | ESCO_HV1, 0xffff, 0xff }, /* D0 */
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};
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static const struct sco_param esco_param_msbc[] = {
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{ EDR_ESCO_MASK & ~ESCO_2EV3, 0x000d, 0x02 }, /* T2 */
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{ EDR_ESCO_MASK | ESCO_EV3, 0x0008, 0x02 }, /* T1 */
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};
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/* This function requires the caller holds hdev->lock */
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static void hci_connect_le_scan_cleanup(struct hci_conn *conn)
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{
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struct hci_conn_params *params;
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struct hci_dev *hdev = conn->hdev;
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struct smp_irk *irk;
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bdaddr_t *bdaddr;
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u8 bdaddr_type;
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bdaddr = &conn->dst;
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bdaddr_type = conn->dst_type;
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/* Check if we need to convert to identity address */
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irk = hci_get_irk(hdev, bdaddr, bdaddr_type);
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if (irk) {
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bdaddr = &irk->bdaddr;
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bdaddr_type = irk->addr_type;
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}
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params = hci_pend_le_action_lookup(&hdev->pend_le_conns, bdaddr,
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bdaddr_type);
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if (!params || !params->explicit_connect)
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return;
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/* The connection attempt was doing scan for new RPA, and is
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* in scan phase. If params are not associated with any other
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* autoconnect action, remove them completely. If they are, just unmark
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* them as waiting for connection, by clearing explicit_connect field.
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*/
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params->explicit_connect = false;
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list_del_init(¶ms->action);
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switch (params->auto_connect) {
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case HCI_AUTO_CONN_EXPLICIT:
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hci_conn_params_del(hdev, bdaddr, bdaddr_type);
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/* return instead of break to avoid duplicate scan update */
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return;
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case HCI_AUTO_CONN_DIRECT:
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case HCI_AUTO_CONN_ALWAYS:
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list_add(¶ms->action, &hdev->pend_le_conns);
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break;
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case HCI_AUTO_CONN_REPORT:
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list_add(¶ms->action, &hdev->pend_le_reports);
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break;
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default:
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break;
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}
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hci_update_passive_scan(hdev);
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}
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static void hci_conn_cleanup(struct hci_conn *conn)
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{
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struct hci_dev *hdev = conn->hdev;
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if (test_bit(HCI_CONN_PARAM_REMOVAL_PEND, &conn->flags))
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hci_conn_params_del(conn->hdev, &conn->dst, conn->dst_type);
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if (test_and_clear_bit(HCI_CONN_FLUSH_KEY, &conn->flags))
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hci_remove_link_key(hdev, &conn->dst);
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hci_chan_list_flush(conn);
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hci_conn_hash_del(hdev, conn);
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if (conn->cleanup)
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conn->cleanup(conn);
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if (conn->type == SCO_LINK || conn->type == ESCO_LINK) {
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switch (conn->setting & SCO_AIRMODE_MASK) {
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case SCO_AIRMODE_CVSD:
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case SCO_AIRMODE_TRANSP:
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if (hdev->notify)
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hdev->notify(hdev, HCI_NOTIFY_DISABLE_SCO);
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break;
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}
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} else {
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if (hdev->notify)
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hdev->notify(hdev, HCI_NOTIFY_CONN_DEL);
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}
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hci_conn_del_sysfs(conn);
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debugfs_remove_recursive(conn->debugfs);
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hci_dev_put(hdev);
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hci_conn_put(conn);
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}
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static void le_scan_cleanup(struct work_struct *work)
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{
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struct hci_conn *conn = container_of(work, struct hci_conn,
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le_scan_cleanup);
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struct hci_dev *hdev = conn->hdev;
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struct hci_conn *c = NULL;
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BT_DBG("%s hcon %p", hdev->name, conn);
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hci_dev_lock(hdev);
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/* Check that the hci_conn is still around */
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rcu_read_lock();
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list_for_each_entry_rcu(c, &hdev->conn_hash.list, list) {
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if (c == conn)
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break;
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}
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rcu_read_unlock();
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if (c == conn) {
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hci_connect_le_scan_cleanup(conn);
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hci_conn_cleanup(conn);
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}
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hci_dev_unlock(hdev);
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hci_dev_put(hdev);
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hci_conn_put(conn);
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}
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static void hci_connect_le_scan_remove(struct hci_conn *conn)
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{
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BT_DBG("%s hcon %p", conn->hdev->name, conn);
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/* We can't call hci_conn_del/hci_conn_cleanup here since that
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* could deadlock with another hci_conn_del() call that's holding
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* hci_dev_lock and doing cancel_delayed_work_sync(&conn->disc_work).
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* Instead, grab temporary extra references to the hci_dev and
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* hci_conn and perform the necessary cleanup in a separate work
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* callback.
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*/
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hci_dev_hold(conn->hdev);
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hci_conn_get(conn);
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/* Even though we hold a reference to the hdev, many other
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* things might get cleaned up meanwhile, including the hdev's
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* own workqueue, so we can't use that for scheduling.
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*/
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schedule_work(&conn->le_scan_cleanup);
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}
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static void hci_acl_create_connection(struct hci_conn *conn)
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{
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struct hci_dev *hdev = conn->hdev;
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struct inquiry_entry *ie;
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struct hci_cp_create_conn cp;
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BT_DBG("hcon %p", conn);
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/* Many controllers disallow HCI Create Connection while it is doing
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* HCI Inquiry. So we cancel the Inquiry first before issuing HCI Create
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* Connection. This may cause the MGMT discovering state to become false
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* without user space's request but it is okay since the MGMT Discovery
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* APIs do not promise that discovery should be done forever. Instead,
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* the user space monitors the status of MGMT discovering and it may
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* request for discovery again when this flag becomes false.
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*/
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if (test_bit(HCI_INQUIRY, &hdev->flags)) {
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/* Put this connection to "pending" state so that it will be
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* executed after the inquiry cancel command complete event.
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*/
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conn->state = BT_CONNECT2;
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hci_send_cmd(hdev, HCI_OP_INQUIRY_CANCEL, 0, NULL);
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return;
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}
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conn->state = BT_CONNECT;
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conn->out = true;
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conn->role = HCI_ROLE_MASTER;
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conn->attempt++;
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conn->link_policy = hdev->link_policy;
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memset(&cp, 0, sizeof(cp));
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bacpy(&cp.bdaddr, &conn->dst);
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cp.pscan_rep_mode = 0x02;
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ie = hci_inquiry_cache_lookup(hdev, &conn->dst);
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if (ie) {
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if (inquiry_entry_age(ie) <= INQUIRY_ENTRY_AGE_MAX) {
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cp.pscan_rep_mode = ie->data.pscan_rep_mode;
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cp.pscan_mode = ie->data.pscan_mode;
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cp.clock_offset = ie->data.clock_offset |
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cpu_to_le16(0x8000);
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}
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memcpy(conn->dev_class, ie->data.dev_class, 3);
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}
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cp.pkt_type = cpu_to_le16(conn->pkt_type);
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if (lmp_rswitch_capable(hdev) && !(hdev->link_mode & HCI_LM_MASTER))
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cp.role_switch = 0x01;
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else
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cp.role_switch = 0x00;
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hci_send_cmd(hdev, HCI_OP_CREATE_CONN, sizeof(cp), &cp);
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}
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int hci_disconnect(struct hci_conn *conn, __u8 reason)
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{
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BT_DBG("hcon %p", conn);
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/* When we are central of an established connection and it enters
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* the disconnect timeout, then go ahead and try to read the
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* current clock offset. Processing of the result is done
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* within the event handling and hci_clock_offset_evt function.
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*/
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if (conn->type == ACL_LINK && conn->role == HCI_ROLE_MASTER &&
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(conn->state == BT_CONNECTED || conn->state == BT_CONFIG)) {
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struct hci_dev *hdev = conn->hdev;
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struct hci_cp_read_clock_offset clkoff_cp;
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clkoff_cp.handle = cpu_to_le16(conn->handle);
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hci_send_cmd(hdev, HCI_OP_READ_CLOCK_OFFSET, sizeof(clkoff_cp),
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&clkoff_cp);
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}
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return hci_abort_conn(conn, reason);
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}
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static void hci_add_sco(struct hci_conn *conn, __u16 handle)
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{
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struct hci_dev *hdev = conn->hdev;
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struct hci_cp_add_sco cp;
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BT_DBG("hcon %p", conn);
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conn->state = BT_CONNECT;
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conn->out = true;
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conn->attempt++;
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cp.handle = cpu_to_le16(handle);
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cp.pkt_type = cpu_to_le16(conn->pkt_type);
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hci_send_cmd(hdev, HCI_OP_ADD_SCO, sizeof(cp), &cp);
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}
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static bool find_next_esco_param(struct hci_conn *conn,
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const struct sco_param *esco_param, int size)
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{
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for (; conn->attempt <= size; conn->attempt++) {
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if (lmp_esco_2m_capable(conn->link) ||
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(esco_param[conn->attempt - 1].pkt_type & ESCO_2EV3))
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break;
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BT_DBG("hcon %p skipped attempt %d, eSCO 2M not supported",
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conn, conn->attempt);
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}
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return conn->attempt <= size;
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}
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static int configure_datapath_sync(struct hci_dev *hdev, struct bt_codec *codec)
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{
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int err;
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__u8 vnd_len, *vnd_data = NULL;
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struct hci_op_configure_data_path *cmd = NULL;
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err = hdev->get_codec_config_data(hdev, ESCO_LINK, codec, &vnd_len,
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&vnd_data);
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if (err < 0)
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goto error;
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cmd = kzalloc(sizeof(*cmd) + vnd_len, GFP_KERNEL);
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if (!cmd) {
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err = -ENOMEM;
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goto error;
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}
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err = hdev->get_data_path_id(hdev, &cmd->data_path_id);
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if (err < 0)
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goto error;
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cmd->vnd_len = vnd_len;
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memcpy(cmd->vnd_data, vnd_data, vnd_len);
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cmd->direction = 0x00;
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__hci_cmd_sync_status(hdev, HCI_CONFIGURE_DATA_PATH,
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sizeof(*cmd) + vnd_len, cmd, HCI_CMD_TIMEOUT);
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cmd->direction = 0x01;
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err = __hci_cmd_sync_status(hdev, HCI_CONFIGURE_DATA_PATH,
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sizeof(*cmd) + vnd_len, cmd,
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HCI_CMD_TIMEOUT);
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error:
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kfree(cmd);
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kfree(vnd_data);
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return err;
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}
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static int hci_enhanced_setup_sync(struct hci_dev *hdev, void *data)
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{
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struct conn_handle_t *conn_handle = data;
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struct hci_conn *conn = conn_handle->conn;
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__u16 handle = conn_handle->handle;
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struct hci_cp_enhanced_setup_sync_conn cp;
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const struct sco_param *param;
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kfree(conn_handle);
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bt_dev_dbg(hdev, "hcon %p", conn);
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/* for offload use case, codec needs to configured before opening SCO */
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if (conn->codec.data_path)
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configure_datapath_sync(hdev, &conn->codec);
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conn->state = BT_CONNECT;
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conn->out = true;
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conn->attempt++;
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memset(&cp, 0x00, sizeof(cp));
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cp.handle = cpu_to_le16(handle);
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cp.tx_bandwidth = cpu_to_le32(0x00001f40);
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cp.rx_bandwidth = cpu_to_le32(0x00001f40);
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switch (conn->codec.id) {
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case BT_CODEC_MSBC:
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if (!find_next_esco_param(conn, esco_param_msbc,
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ARRAY_SIZE(esco_param_msbc)))
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return -EINVAL;
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param = &esco_param_msbc[conn->attempt - 1];
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cp.tx_coding_format.id = 0x05;
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cp.rx_coding_format.id = 0x05;
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cp.tx_codec_frame_size = __cpu_to_le16(60);
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cp.rx_codec_frame_size = __cpu_to_le16(60);
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cp.in_bandwidth = __cpu_to_le32(32000);
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cp.out_bandwidth = __cpu_to_le32(32000);
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cp.in_coding_format.id = 0x04;
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cp.out_coding_format.id = 0x04;
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cp.in_coded_data_size = __cpu_to_le16(16);
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cp.out_coded_data_size = __cpu_to_le16(16);
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cp.in_pcm_data_format = 2;
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cp.out_pcm_data_format = 2;
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cp.in_pcm_sample_payload_msb_pos = 0;
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cp.out_pcm_sample_payload_msb_pos = 0;
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cp.in_data_path = conn->codec.data_path;
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cp.out_data_path = conn->codec.data_path;
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cp.in_transport_unit_size = 1;
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cp.out_transport_unit_size = 1;
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break;
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case BT_CODEC_TRANSPARENT:
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if (!find_next_esco_param(conn, esco_param_msbc,
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ARRAY_SIZE(esco_param_msbc)))
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return false;
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param = &esco_param_msbc[conn->attempt - 1];
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cp.tx_coding_format.id = 0x03;
|
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cp.rx_coding_format.id = 0x03;
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cp.tx_codec_frame_size = __cpu_to_le16(60);
|
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cp.rx_codec_frame_size = __cpu_to_le16(60);
|
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cp.in_bandwidth = __cpu_to_le32(0x1f40);
|
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cp.out_bandwidth = __cpu_to_le32(0x1f40);
|
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cp.in_coding_format.id = 0x03;
|
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cp.out_coding_format.id = 0x03;
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cp.in_coded_data_size = __cpu_to_le16(16);
|
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cp.out_coded_data_size = __cpu_to_le16(16);
|
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cp.in_pcm_data_format = 2;
|
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cp.out_pcm_data_format = 2;
|
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cp.in_pcm_sample_payload_msb_pos = 0;
|
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cp.out_pcm_sample_payload_msb_pos = 0;
|
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cp.in_data_path = conn->codec.data_path;
|
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cp.out_data_path = conn->codec.data_path;
|
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cp.in_transport_unit_size = 1;
|
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cp.out_transport_unit_size = 1;
|
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break;
|
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|
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case BT_CODEC_CVSD:
|
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if (lmp_esco_capable(conn->link)) {
|
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if (!find_next_esco_param(conn, esco_param_cvsd,
|
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ARRAY_SIZE(esco_param_cvsd)))
|
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return -EINVAL;
|
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param = &esco_param_cvsd[conn->attempt - 1];
|
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} else {
|
|
if (conn->attempt > ARRAY_SIZE(sco_param_cvsd))
|
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return -EINVAL;
|
|
param = &sco_param_cvsd[conn->attempt - 1];
|
|
}
|
|
cp.tx_coding_format.id = 2;
|
|
cp.rx_coding_format.id = 2;
|
|
cp.tx_codec_frame_size = __cpu_to_le16(60);
|
|
cp.rx_codec_frame_size = __cpu_to_le16(60);
|
|
cp.in_bandwidth = __cpu_to_le32(16000);
|
|
cp.out_bandwidth = __cpu_to_le32(16000);
|
|
cp.in_coding_format.id = 4;
|
|
cp.out_coding_format.id = 4;
|
|
cp.in_coded_data_size = __cpu_to_le16(16);
|
|
cp.out_coded_data_size = __cpu_to_le16(16);
|
|
cp.in_pcm_data_format = 2;
|
|
cp.out_pcm_data_format = 2;
|
|
cp.in_pcm_sample_payload_msb_pos = 0;
|
|
cp.out_pcm_sample_payload_msb_pos = 0;
|
|
cp.in_data_path = conn->codec.data_path;
|
|
cp.out_data_path = conn->codec.data_path;
|
|
cp.in_transport_unit_size = 16;
|
|
cp.out_transport_unit_size = 16;
|
|
break;
|
|
default:
|
|
return -EINVAL;
|
|
}
|
|
|
|
cp.retrans_effort = param->retrans_effort;
|
|
cp.pkt_type = __cpu_to_le16(param->pkt_type);
|
|
cp.max_latency = __cpu_to_le16(param->max_latency);
|
|
|
|
if (hci_send_cmd(hdev, HCI_OP_ENHANCED_SETUP_SYNC_CONN, sizeof(cp), &cp) < 0)
|
|
return -EIO;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static bool hci_setup_sync_conn(struct hci_conn *conn, __u16 handle)
|
|
{
|
|
struct hci_dev *hdev = conn->hdev;
|
|
struct hci_cp_setup_sync_conn cp;
|
|
const struct sco_param *param;
|
|
|
|
bt_dev_dbg(hdev, "hcon %p", conn);
|
|
|
|
conn->state = BT_CONNECT;
|
|
conn->out = true;
|
|
|
|
conn->attempt++;
|
|
|
|
cp.handle = cpu_to_le16(handle);
|
|
|
|
cp.tx_bandwidth = cpu_to_le32(0x00001f40);
|
|
cp.rx_bandwidth = cpu_to_le32(0x00001f40);
|
|
cp.voice_setting = cpu_to_le16(conn->setting);
|
|
|
|
switch (conn->setting & SCO_AIRMODE_MASK) {
|
|
case SCO_AIRMODE_TRANSP:
|
|
if (!find_next_esco_param(conn, esco_param_msbc,
|
|
ARRAY_SIZE(esco_param_msbc)))
|
|
return false;
|
|
param = &esco_param_msbc[conn->attempt - 1];
|
|
break;
|
|
case SCO_AIRMODE_CVSD:
|
|
if (lmp_esco_capable(conn->link)) {
|
|
if (!find_next_esco_param(conn, esco_param_cvsd,
|
|
ARRAY_SIZE(esco_param_cvsd)))
|
|
return false;
|
|
param = &esco_param_cvsd[conn->attempt - 1];
|
|
} else {
|
|
if (conn->attempt > ARRAY_SIZE(sco_param_cvsd))
|
|
return false;
|
|
param = &sco_param_cvsd[conn->attempt - 1];
|
|
}
|
|
break;
|
|
default:
|
|
return false;
|
|
}
|
|
|
|
cp.retrans_effort = param->retrans_effort;
|
|
cp.pkt_type = __cpu_to_le16(param->pkt_type);
|
|
cp.max_latency = __cpu_to_le16(param->max_latency);
|
|
|
|
if (hci_send_cmd(hdev, HCI_OP_SETUP_SYNC_CONN, sizeof(cp), &cp) < 0)
|
|
return false;
|
|
|
|
return true;
|
|
}
|
|
|
|
bool hci_setup_sync(struct hci_conn *conn, __u16 handle)
|
|
{
|
|
int result;
|
|
struct conn_handle_t *conn_handle;
|
|
|
|
if (enhanced_sync_conn_capable(conn->hdev)) {
|
|
conn_handle = kzalloc(sizeof(*conn_handle), GFP_KERNEL);
|
|
|
|
if (!conn_handle)
|
|
return false;
|
|
|
|
conn_handle->conn = conn;
|
|
conn_handle->handle = handle;
|
|
result = hci_cmd_sync_queue(conn->hdev, hci_enhanced_setup_sync,
|
|
conn_handle, NULL);
|
|
if (result < 0)
|
|
kfree(conn_handle);
|
|
|
|
return result == 0;
|
|
}
|
|
|
|
return hci_setup_sync_conn(conn, handle);
|
|
}
|
|
|
|
u8 hci_le_conn_update(struct hci_conn *conn, u16 min, u16 max, u16 latency,
|
|
u16 to_multiplier)
|
|
{
|
|
struct hci_dev *hdev = conn->hdev;
|
|
struct hci_conn_params *params;
|
|
struct hci_cp_le_conn_update cp;
|
|
|
|
hci_dev_lock(hdev);
|
|
|
|
params = hci_conn_params_lookup(hdev, &conn->dst, conn->dst_type);
|
|
if (params) {
|
|
params->conn_min_interval = min;
|
|
params->conn_max_interval = max;
|
|
params->conn_latency = latency;
|
|
params->supervision_timeout = to_multiplier;
|
|
}
|
|
|
|
hci_dev_unlock(hdev);
|
|
|
|
memset(&cp, 0, sizeof(cp));
|
|
cp.handle = cpu_to_le16(conn->handle);
|
|
cp.conn_interval_min = cpu_to_le16(min);
|
|
cp.conn_interval_max = cpu_to_le16(max);
|
|
cp.conn_latency = cpu_to_le16(latency);
|
|
cp.supervision_timeout = cpu_to_le16(to_multiplier);
|
|
cp.min_ce_len = cpu_to_le16(0x0000);
|
|
cp.max_ce_len = cpu_to_le16(0x0000);
|
|
|
|
hci_send_cmd(hdev, HCI_OP_LE_CONN_UPDATE, sizeof(cp), &cp);
|
|
|
|
if (params)
|
|
return 0x01;
|
|
|
|
return 0x00;
|
|
}
|
|
|
|
void hci_le_start_enc(struct hci_conn *conn, __le16 ediv, __le64 rand,
|
|
__u8 ltk[16], __u8 key_size)
|
|
{
|
|
struct hci_dev *hdev = conn->hdev;
|
|
struct hci_cp_le_start_enc cp;
|
|
|
|
BT_DBG("hcon %p", conn);
|
|
|
|
memset(&cp, 0, sizeof(cp));
|
|
|
|
cp.handle = cpu_to_le16(conn->handle);
|
|
cp.rand = rand;
|
|
cp.ediv = ediv;
|
|
memcpy(cp.ltk, ltk, key_size);
|
|
|
|
hci_send_cmd(hdev, HCI_OP_LE_START_ENC, sizeof(cp), &cp);
|
|
}
|
|
|
|
/* Device _must_ be locked */
|
|
void hci_sco_setup(struct hci_conn *conn, __u8 status)
|
|
{
|
|
struct hci_conn *sco = conn->link;
|
|
|
|
if (!sco)
|
|
return;
|
|
|
|
BT_DBG("hcon %p", conn);
|
|
|
|
if (!status) {
|
|
if (lmp_esco_capable(conn->hdev))
|
|
hci_setup_sync(sco, conn->handle);
|
|
else
|
|
hci_add_sco(sco, conn->handle);
|
|
} else {
|
|
hci_connect_cfm(sco, status);
|
|
hci_conn_del(sco);
|
|
}
|
|
}
|
|
|
|
static void hci_conn_timeout(struct work_struct *work)
|
|
{
|
|
struct hci_conn *conn = container_of(work, struct hci_conn,
|
|
disc_work.work);
|
|
int refcnt = atomic_read(&conn->refcnt);
|
|
|
|
BT_DBG("hcon %p state %s", conn, state_to_string(conn->state));
|
|
|
|
WARN_ON(refcnt < 0);
|
|
|
|
/* FIXME: It was observed that in pairing failed scenario, refcnt
|
|
* drops below 0. Probably this is because l2cap_conn_del calls
|
|
* l2cap_chan_del for each channel, and inside l2cap_chan_del conn is
|
|
* dropped. After that loop hci_chan_del is called which also drops
|
|
* conn. For now make sure that ACL is alive if refcnt is higher then 0,
|
|
* otherwise drop it.
|
|
*/
|
|
if (refcnt > 0)
|
|
return;
|
|
|
|
/* LE connections in scanning state need special handling */
|
|
if (conn->state == BT_CONNECT && conn->type == LE_LINK &&
|
|
test_bit(HCI_CONN_SCANNING, &conn->flags)) {
|
|
hci_connect_le_scan_remove(conn);
|
|
return;
|
|
}
|
|
|
|
hci_abort_conn(conn, hci_proto_disconn_ind(conn));
|
|
}
|
|
|
|
/* Enter sniff mode */
|
|
static void hci_conn_idle(struct work_struct *work)
|
|
{
|
|
struct hci_conn *conn = container_of(work, struct hci_conn,
|
|
idle_work.work);
|
|
struct hci_dev *hdev = conn->hdev;
|
|
|
|
BT_DBG("hcon %p mode %d", conn, conn->mode);
|
|
|
|
if (!lmp_sniff_capable(hdev) || !lmp_sniff_capable(conn))
|
|
return;
|
|
|
|
if (conn->mode != HCI_CM_ACTIVE || !(conn->link_policy & HCI_LP_SNIFF))
|
|
return;
|
|
|
|
if (lmp_sniffsubr_capable(hdev) && lmp_sniffsubr_capable(conn)) {
|
|
struct hci_cp_sniff_subrate cp;
|
|
cp.handle = cpu_to_le16(conn->handle);
|
|
cp.max_latency = cpu_to_le16(0);
|
|
cp.min_remote_timeout = cpu_to_le16(0);
|
|
cp.min_local_timeout = cpu_to_le16(0);
|
|
hci_send_cmd(hdev, HCI_OP_SNIFF_SUBRATE, sizeof(cp), &cp);
|
|
}
|
|
|
|
if (!test_and_set_bit(HCI_CONN_MODE_CHANGE_PEND, &conn->flags)) {
|
|
struct hci_cp_sniff_mode cp;
|
|
cp.handle = cpu_to_le16(conn->handle);
|
|
cp.max_interval = cpu_to_le16(hdev->sniff_max_interval);
|
|
cp.min_interval = cpu_to_le16(hdev->sniff_min_interval);
|
|
cp.attempt = cpu_to_le16(4);
|
|
cp.timeout = cpu_to_le16(1);
|
|
hci_send_cmd(hdev, HCI_OP_SNIFF_MODE, sizeof(cp), &cp);
|
|
}
|
|
}
|
|
|
|
static void hci_conn_auto_accept(struct work_struct *work)
|
|
{
|
|
struct hci_conn *conn = container_of(work, struct hci_conn,
|
|
auto_accept_work.work);
|
|
|
|
hci_send_cmd(conn->hdev, HCI_OP_USER_CONFIRM_REPLY, sizeof(conn->dst),
|
|
&conn->dst);
|
|
}
|
|
|
|
static void le_disable_advertising(struct hci_dev *hdev)
|
|
{
|
|
if (ext_adv_capable(hdev)) {
|
|
struct hci_cp_le_set_ext_adv_enable cp;
|
|
|
|
cp.enable = 0x00;
|
|
cp.num_of_sets = 0x00;
|
|
|
|
hci_send_cmd(hdev, HCI_OP_LE_SET_EXT_ADV_ENABLE, sizeof(cp),
|
|
&cp);
|
|
} else {
|
|
u8 enable = 0x00;
|
|
hci_send_cmd(hdev, HCI_OP_LE_SET_ADV_ENABLE, sizeof(enable),
|
|
&enable);
|
|
}
|
|
}
|
|
|
|
static void le_conn_timeout(struct work_struct *work)
|
|
{
|
|
struct hci_conn *conn = container_of(work, struct hci_conn,
|
|
le_conn_timeout.work);
|
|
struct hci_dev *hdev = conn->hdev;
|
|
|
|
BT_DBG("");
|
|
|
|
/* We could end up here due to having done directed advertising,
|
|
* so clean up the state if necessary. This should however only
|
|
* happen with broken hardware or if low duty cycle was used
|
|
* (which doesn't have a timeout of its own).
|
|
*/
|
|
if (conn->role == HCI_ROLE_SLAVE) {
|
|
/* Disable LE Advertising */
|
|
le_disable_advertising(hdev);
|
|
hci_dev_lock(hdev);
|
|
hci_conn_failed(conn, HCI_ERROR_ADVERTISING_TIMEOUT);
|
|
hci_dev_unlock(hdev);
|
|
return;
|
|
}
|
|
|
|
hci_abort_conn(conn, HCI_ERROR_REMOTE_USER_TERM);
|
|
}
|
|
|
|
struct iso_list_data {
|
|
union {
|
|
u8 cig;
|
|
u8 big;
|
|
};
|
|
union {
|
|
u8 cis;
|
|
u8 bis;
|
|
u16 sync_handle;
|
|
};
|
|
int count;
|
|
struct {
|
|
struct hci_cp_le_set_cig_params cp;
|
|
struct hci_cis_params cis[0x11];
|
|
} pdu;
|
|
};
|
|
|
|
static void bis_list(struct hci_conn *conn, void *data)
|
|
{
|
|
struct iso_list_data *d = data;
|
|
|
|
/* Skip if not broadcast/ANY address */
|
|
if (bacmp(&conn->dst, BDADDR_ANY))
|
|
return;
|
|
|
|
if (d->big != conn->iso_qos.big || d->bis == BT_ISO_QOS_BIS_UNSET ||
|
|
d->bis != conn->iso_qos.bis)
|
|
return;
|
|
|
|
d->count++;
|
|
}
|
|
|
|
static void find_bis(struct hci_conn *conn, void *data)
|
|
{
|
|
struct iso_list_data *d = data;
|
|
|
|
/* Ignore unicast */
|
|
if (bacmp(&conn->dst, BDADDR_ANY))
|
|
return;
|
|
|
|
d->count++;
|
|
}
|
|
|
|
static int terminate_big_sync(struct hci_dev *hdev, void *data)
|
|
{
|
|
struct iso_list_data *d = data;
|
|
|
|
bt_dev_dbg(hdev, "big 0x%2.2x bis 0x%2.2x", d->big, d->bis);
|
|
|
|
hci_remove_ext_adv_instance_sync(hdev, d->bis, NULL);
|
|
|
|
/* Check if ISO connection is a BIS and terminate BIG if there are
|
|
* no other connections using it.
|
|
*/
|
|
hci_conn_hash_list_state(hdev, find_bis, ISO_LINK, BT_CONNECTED, d);
|
|
if (d->count)
|
|
return 0;
|
|
|
|
return hci_le_terminate_big_sync(hdev, d->big,
|
|
HCI_ERROR_LOCAL_HOST_TERM);
|
|
}
|
|
|
|
static void terminate_big_destroy(struct hci_dev *hdev, void *data, int err)
|
|
{
|
|
kfree(data);
|
|
}
|
|
|
|
static int hci_le_terminate_big(struct hci_dev *hdev, u8 big, u8 bis)
|
|
{
|
|
struct iso_list_data *d;
|
|
int ret;
|
|
|
|
bt_dev_dbg(hdev, "big 0x%2.2x bis 0x%2.2x", big, bis);
|
|
|
|
d = kzalloc(sizeof(*d), GFP_KERNEL);
|
|
if (!d)
|
|
return -ENOMEM;
|
|
|
|
d->big = big;
|
|
d->bis = bis;
|
|
|
|
ret = hci_cmd_sync_queue(hdev, terminate_big_sync, d,
|
|
terminate_big_destroy);
|
|
if (ret)
|
|
kfree(d);
|
|
|
|
return ret;
|
|
}
|
|
|
|
static int big_terminate_sync(struct hci_dev *hdev, void *data)
|
|
{
|
|
struct iso_list_data *d = data;
|
|
|
|
bt_dev_dbg(hdev, "big 0x%2.2x sync_handle 0x%4.4x", d->big,
|
|
d->sync_handle);
|
|
|
|
/* Check if ISO connection is a BIS and terminate BIG if there are
|
|
* no other connections using it.
|
|
*/
|
|
hci_conn_hash_list_state(hdev, find_bis, ISO_LINK, BT_CONNECTED, d);
|
|
if (d->count)
|
|
return 0;
|
|
|
|
hci_le_big_terminate_sync(hdev, d->big);
|
|
|
|
return hci_le_pa_terminate_sync(hdev, d->sync_handle);
|
|
}
|
|
|
|
static int hci_le_big_terminate(struct hci_dev *hdev, u8 big, u16 sync_handle)
|
|
{
|
|
struct iso_list_data *d;
|
|
int ret;
|
|
|
|
bt_dev_dbg(hdev, "big 0x%2.2x sync_handle 0x%4.4x", big, sync_handle);
|
|
|
|
d = kzalloc(sizeof(*d), GFP_KERNEL);
|
|
if (!d)
|
|
return -ENOMEM;
|
|
|
|
d->big = big;
|
|
d->sync_handle = sync_handle;
|
|
|
|
ret = hci_cmd_sync_queue(hdev, big_terminate_sync, d,
|
|
terminate_big_destroy);
|
|
if (ret)
|
|
kfree(d);
|
|
|
|
return ret;
|
|
}
|
|
|
|
/* Cleanup BIS connection
|
|
*
|
|
* Detects if there any BIS left connected in a BIG
|
|
* broadcaster: Remove advertising instance and terminate BIG.
|
|
* broadcaster receiver: Teminate BIG sync and terminate PA sync.
|
|
*/
|
|
static void bis_cleanup(struct hci_conn *conn)
|
|
{
|
|
struct hci_dev *hdev = conn->hdev;
|
|
|
|
bt_dev_dbg(hdev, "conn %p", conn);
|
|
|
|
if (conn->role == HCI_ROLE_MASTER) {
|
|
if (!test_and_clear_bit(HCI_CONN_PER_ADV, &conn->flags))
|
|
return;
|
|
|
|
hci_le_terminate_big(hdev, conn->iso_qos.big,
|
|
conn->iso_qos.bis);
|
|
} else {
|
|
hci_le_big_terminate(hdev, conn->iso_qos.big,
|
|
conn->sync_handle);
|
|
}
|
|
}
|
|
|
|
static int remove_cig_sync(struct hci_dev *hdev, void *data)
|
|
{
|
|
u8 handle = PTR_ERR(data);
|
|
|
|
return hci_le_remove_cig_sync(hdev, handle);
|
|
}
|
|
|
|
static int hci_le_remove_cig(struct hci_dev *hdev, u8 handle)
|
|
{
|
|
bt_dev_dbg(hdev, "handle 0x%2.2x", handle);
|
|
|
|
return hci_cmd_sync_queue(hdev, remove_cig_sync, ERR_PTR(handle), NULL);
|
|
}
|
|
|
|
static void find_cis(struct hci_conn *conn, void *data)
|
|
{
|
|
struct iso_list_data *d = data;
|
|
|
|
/* Ignore broadcast */
|
|
if (!bacmp(&conn->dst, BDADDR_ANY))
|
|
return;
|
|
|
|
d->count++;
|
|
}
|
|
|
|
/* Cleanup CIS connection:
|
|
*
|
|
* Detects if there any CIS left connected in a CIG and remove it.
|
|
*/
|
|
static void cis_cleanup(struct hci_conn *conn)
|
|
{
|
|
struct hci_dev *hdev = conn->hdev;
|
|
struct iso_list_data d;
|
|
|
|
memset(&d, 0, sizeof(d));
|
|
d.cig = conn->iso_qos.cig;
|
|
|
|
/* Check if ISO connection is a CIS and remove CIG if there are
|
|
* no other connections using it.
|
|
*/
|
|
hci_conn_hash_list_state(hdev, find_cis, ISO_LINK, BT_CONNECTED, &d);
|
|
if (d.count)
|
|
return;
|
|
|
|
hci_le_remove_cig(hdev, conn->iso_qos.cig);
|
|
}
|
|
|
|
struct hci_conn *hci_conn_add(struct hci_dev *hdev, int type, bdaddr_t *dst,
|
|
u8 role)
|
|
{
|
|
struct hci_conn *conn;
|
|
|
|
BT_DBG("%s dst %pMR", hdev->name, dst);
|
|
|
|
conn = kzalloc(sizeof(*conn), GFP_KERNEL);
|
|
if (!conn)
|
|
return NULL;
|
|
|
|
bacpy(&conn->dst, dst);
|
|
bacpy(&conn->src, &hdev->bdaddr);
|
|
conn->handle = HCI_CONN_HANDLE_UNSET;
|
|
conn->hdev = hdev;
|
|
conn->type = type;
|
|
conn->role = role;
|
|
conn->mode = HCI_CM_ACTIVE;
|
|
conn->state = BT_OPEN;
|
|
conn->auth_type = HCI_AT_GENERAL_BONDING;
|
|
conn->io_capability = hdev->io_capability;
|
|
conn->remote_auth = 0xff;
|
|
conn->key_type = 0xff;
|
|
conn->rssi = HCI_RSSI_INVALID;
|
|
conn->tx_power = HCI_TX_POWER_INVALID;
|
|
conn->max_tx_power = HCI_TX_POWER_INVALID;
|
|
|
|
set_bit(HCI_CONN_POWER_SAVE, &conn->flags);
|
|
conn->disc_timeout = HCI_DISCONN_TIMEOUT;
|
|
|
|
/* Set Default Authenticated payload timeout to 30s */
|
|
conn->auth_payload_timeout = DEFAULT_AUTH_PAYLOAD_TIMEOUT;
|
|
|
|
if (conn->role == HCI_ROLE_MASTER)
|
|
conn->out = true;
|
|
|
|
switch (type) {
|
|
case ACL_LINK:
|
|
conn->pkt_type = hdev->pkt_type & ACL_PTYPE_MASK;
|
|
break;
|
|
case LE_LINK:
|
|
/* conn->src should reflect the local identity address */
|
|
hci_copy_identity_address(hdev, &conn->src, &conn->src_type);
|
|
break;
|
|
case ISO_LINK:
|
|
/* conn->src should reflect the local identity address */
|
|
hci_copy_identity_address(hdev, &conn->src, &conn->src_type);
|
|
|
|
/* set proper cleanup function */
|
|
if (!bacmp(dst, BDADDR_ANY))
|
|
conn->cleanup = bis_cleanup;
|
|
else if (conn->role == HCI_ROLE_MASTER)
|
|
conn->cleanup = cis_cleanup;
|
|
|
|
break;
|
|
case SCO_LINK:
|
|
if (lmp_esco_capable(hdev))
|
|
conn->pkt_type = (hdev->esco_type & SCO_ESCO_MASK) |
|
|
(hdev->esco_type & EDR_ESCO_MASK);
|
|
else
|
|
conn->pkt_type = hdev->pkt_type & SCO_PTYPE_MASK;
|
|
break;
|
|
case ESCO_LINK:
|
|
conn->pkt_type = hdev->esco_type & ~EDR_ESCO_MASK;
|
|
break;
|
|
}
|
|
|
|
skb_queue_head_init(&conn->data_q);
|
|
|
|
INIT_LIST_HEAD(&conn->chan_list);
|
|
|
|
INIT_DELAYED_WORK(&conn->disc_work, hci_conn_timeout);
|
|
INIT_DELAYED_WORK(&conn->auto_accept_work, hci_conn_auto_accept);
|
|
INIT_DELAYED_WORK(&conn->idle_work, hci_conn_idle);
|
|
INIT_DELAYED_WORK(&conn->le_conn_timeout, le_conn_timeout);
|
|
INIT_WORK(&conn->le_scan_cleanup, le_scan_cleanup);
|
|
|
|
atomic_set(&conn->refcnt, 0);
|
|
|
|
hci_dev_hold(hdev);
|
|
|
|
hci_conn_hash_add(hdev, conn);
|
|
|
|
/* The SCO and eSCO connections will only be notified when their
|
|
* setup has been completed. This is different to ACL links which
|
|
* can be notified right away.
|
|
*/
|
|
if (conn->type != SCO_LINK && conn->type != ESCO_LINK) {
|
|
if (hdev->notify)
|
|
hdev->notify(hdev, HCI_NOTIFY_CONN_ADD);
|
|
}
|
|
|
|
hci_conn_init_sysfs(conn);
|
|
|
|
return conn;
|
|
}
|
|
|
|
int hci_conn_del(struct hci_conn *conn)
|
|
{
|
|
struct hci_dev *hdev = conn->hdev;
|
|
|
|
BT_DBG("%s hcon %p handle %d", hdev->name, conn, conn->handle);
|
|
|
|
cancel_delayed_work_sync(&conn->disc_work);
|
|
cancel_delayed_work_sync(&conn->auto_accept_work);
|
|
cancel_delayed_work_sync(&conn->idle_work);
|
|
|
|
if (conn->type == ACL_LINK) {
|
|
struct hci_conn *sco = conn->link;
|
|
if (sco) {
|
|
sco->link = NULL;
|
|
/* Due to race, SCO connection might be not established
|
|
* yet at this point. Delete it now, otherwise it is
|
|
* possible for it to be stuck and can't be deleted.
|
|
*/
|
|
if (sco->handle == HCI_CONN_HANDLE_UNSET)
|
|
hci_conn_del(sco);
|
|
}
|
|
|
|
/* Unacked frames */
|
|
hdev->acl_cnt += conn->sent;
|
|
} else if (conn->type == LE_LINK) {
|
|
cancel_delayed_work(&conn->le_conn_timeout);
|
|
|
|
if (hdev->le_pkts)
|
|
hdev->le_cnt += conn->sent;
|
|
else
|
|
hdev->acl_cnt += conn->sent;
|
|
} else {
|
|
struct hci_conn *acl = conn->link;
|
|
|
|
if (acl) {
|
|
acl->link = NULL;
|
|
hci_conn_drop(acl);
|
|
}
|
|
|
|
/* Unacked ISO frames */
|
|
if (conn->type == ISO_LINK) {
|
|
if (hdev->iso_pkts)
|
|
hdev->iso_cnt += conn->sent;
|
|
else if (hdev->le_pkts)
|
|
hdev->le_cnt += conn->sent;
|
|
else
|
|
hdev->acl_cnt += conn->sent;
|
|
}
|
|
}
|
|
|
|
if (conn->amp_mgr)
|
|
amp_mgr_put(conn->amp_mgr);
|
|
|
|
skb_queue_purge(&conn->data_q);
|
|
|
|
/* Remove the connection from the list and cleanup its remaining
|
|
* state. This is a separate function since for some cases like
|
|
* BT_CONNECT_SCAN we *only* want the cleanup part without the
|
|
* rest of hci_conn_del.
|
|
*/
|
|
hci_conn_cleanup(conn);
|
|
|
|
return 0;
|
|
}
|
|
|
|
struct hci_dev *hci_get_route(bdaddr_t *dst, bdaddr_t *src, uint8_t src_type)
|
|
{
|
|
int use_src = bacmp(src, BDADDR_ANY);
|
|
struct hci_dev *hdev = NULL, *d;
|
|
|
|
BT_DBG("%pMR -> %pMR", src, dst);
|
|
|
|
read_lock(&hci_dev_list_lock);
|
|
|
|
list_for_each_entry(d, &hci_dev_list, list) {
|
|
if (!test_bit(HCI_UP, &d->flags) ||
|
|
hci_dev_test_flag(d, HCI_USER_CHANNEL) ||
|
|
d->dev_type != HCI_PRIMARY)
|
|
continue;
|
|
|
|
/* Simple routing:
|
|
* No source address - find interface with bdaddr != dst
|
|
* Source address - find interface with bdaddr == src
|
|
*/
|
|
|
|
if (use_src) {
|
|
bdaddr_t id_addr;
|
|
u8 id_addr_type;
|
|
|
|
if (src_type == BDADDR_BREDR) {
|
|
if (!lmp_bredr_capable(d))
|
|
continue;
|
|
bacpy(&id_addr, &d->bdaddr);
|
|
id_addr_type = BDADDR_BREDR;
|
|
} else {
|
|
if (!lmp_le_capable(d))
|
|
continue;
|
|
|
|
hci_copy_identity_address(d, &id_addr,
|
|
&id_addr_type);
|
|
|
|
/* Convert from HCI to three-value type */
|
|
if (id_addr_type == ADDR_LE_DEV_PUBLIC)
|
|
id_addr_type = BDADDR_LE_PUBLIC;
|
|
else
|
|
id_addr_type = BDADDR_LE_RANDOM;
|
|
}
|
|
|
|
if (!bacmp(&id_addr, src) && id_addr_type == src_type) {
|
|
hdev = d; break;
|
|
}
|
|
} else {
|
|
if (bacmp(&d->bdaddr, dst)) {
|
|
hdev = d; break;
|
|
}
|
|
}
|
|
}
|
|
|
|
if (hdev)
|
|
hdev = hci_dev_hold(hdev);
|
|
|
|
read_unlock(&hci_dev_list_lock);
|
|
return hdev;
|
|
}
|
|
EXPORT_SYMBOL(hci_get_route);
|
|
|
|
/* This function requires the caller holds hdev->lock */
|
|
static void hci_le_conn_failed(struct hci_conn *conn, u8 status)
|
|
{
|
|
struct hci_dev *hdev = conn->hdev;
|
|
struct hci_conn_params *params;
|
|
|
|
params = hci_pend_le_action_lookup(&hdev->pend_le_conns, &conn->dst,
|
|
conn->dst_type);
|
|
if (params && params->conn) {
|
|
hci_conn_drop(params->conn);
|
|
hci_conn_put(params->conn);
|
|
params->conn = NULL;
|
|
}
|
|
|
|
/* If the status indicates successful cancellation of
|
|
* the attempt (i.e. Unknown Connection Id) there's no point of
|
|
* notifying failure since we'll go back to keep trying to
|
|
* connect. The only exception is explicit connect requests
|
|
* where a timeout + cancel does indicate an actual failure.
|
|
*/
|
|
if (status != HCI_ERROR_UNKNOWN_CONN_ID ||
|
|
(params && params->explicit_connect))
|
|
mgmt_connect_failed(hdev, &conn->dst, conn->type,
|
|
conn->dst_type, status);
|
|
|
|
/* Since we may have temporarily stopped the background scanning in
|
|
* favor of connection establishment, we should restart it.
|
|
*/
|
|
hci_update_passive_scan(hdev);
|
|
|
|
/* Enable advertising in case this was a failed connection
|
|
* attempt as a peripheral.
|
|
*/
|
|
hci_enable_advertising(hdev);
|
|
}
|
|
|
|
/* This function requires the caller holds hdev->lock */
|
|
void hci_conn_failed(struct hci_conn *conn, u8 status)
|
|
{
|
|
struct hci_dev *hdev = conn->hdev;
|
|
|
|
bt_dev_dbg(hdev, "status 0x%2.2x", status);
|
|
|
|
switch (conn->type) {
|
|
case LE_LINK:
|
|
hci_le_conn_failed(conn, status);
|
|
break;
|
|
case ACL_LINK:
|
|
mgmt_connect_failed(hdev, &conn->dst, conn->type,
|
|
conn->dst_type, status);
|
|
break;
|
|
}
|
|
|
|
conn->state = BT_CLOSED;
|
|
hci_connect_cfm(conn, status);
|
|
hci_conn_del(conn);
|
|
}
|
|
|
|
static void create_le_conn_complete(struct hci_dev *hdev, void *data, int err)
|
|
{
|
|
struct hci_conn *conn = data;
|
|
|
|
hci_dev_lock(hdev);
|
|
|
|
if (!err) {
|
|
hci_connect_le_scan_cleanup(conn);
|
|
goto done;
|
|
}
|
|
|
|
bt_dev_err(hdev, "request failed to create LE connection: err %d", err);
|
|
|
|
/* Check if connection is still pending */
|
|
if (conn != hci_lookup_le_connect(hdev))
|
|
goto done;
|
|
|
|
/* Flush to make sure we send create conn cancel command if needed */
|
|
flush_delayed_work(&conn->le_conn_timeout);
|
|
hci_conn_failed(conn, bt_status(err));
|
|
|
|
done:
|
|
hci_dev_unlock(hdev);
|
|
}
|
|
|
|
static int hci_connect_le_sync(struct hci_dev *hdev, void *data)
|
|
{
|
|
struct hci_conn *conn = data;
|
|
|
|
bt_dev_dbg(hdev, "conn %p", conn);
|
|
|
|
return hci_le_create_conn_sync(hdev, conn);
|
|
}
|
|
|
|
struct hci_conn *hci_connect_le(struct hci_dev *hdev, bdaddr_t *dst,
|
|
u8 dst_type, bool dst_resolved, u8 sec_level,
|
|
u16 conn_timeout, u8 role)
|
|
{
|
|
struct hci_conn *conn;
|
|
struct smp_irk *irk;
|
|
int err;
|
|
|
|
/* Let's make sure that le is enabled.*/
|
|
if (!hci_dev_test_flag(hdev, HCI_LE_ENABLED)) {
|
|
if (lmp_le_capable(hdev))
|
|
return ERR_PTR(-ECONNREFUSED);
|
|
|
|
return ERR_PTR(-EOPNOTSUPP);
|
|
}
|
|
|
|
/* Since the controller supports only one LE connection attempt at a
|
|
* time, we return -EBUSY if there is any connection attempt running.
|
|
*/
|
|
if (hci_lookup_le_connect(hdev))
|
|
return ERR_PTR(-EBUSY);
|
|
|
|
/* If there's already a connection object but it's not in
|
|
* scanning state it means it must already be established, in
|
|
* which case we can't do anything else except report a failure
|
|
* to connect.
|
|
*/
|
|
conn = hci_conn_hash_lookup_le(hdev, dst, dst_type);
|
|
if (conn && !test_bit(HCI_CONN_SCANNING, &conn->flags)) {
|
|
return ERR_PTR(-EBUSY);
|
|
}
|
|
|
|
/* Check if the destination address has been resolved by the controller
|
|
* since if it did then the identity address shall be used.
|
|
*/
|
|
if (!dst_resolved) {
|
|
/* When given an identity address with existing identity
|
|
* resolving key, the connection needs to be established
|
|
* to a resolvable random address.
|
|
*
|
|
* Storing the resolvable random address is required here
|
|
* to handle connection failures. The address will later
|
|
* be resolved back into the original identity address
|
|
* from the connect request.
|
|
*/
|
|
irk = hci_find_irk_by_addr(hdev, dst, dst_type);
|
|
if (irk && bacmp(&irk->rpa, BDADDR_ANY)) {
|
|
dst = &irk->rpa;
|
|
dst_type = ADDR_LE_DEV_RANDOM;
|
|
}
|
|
}
|
|
|
|
if (conn) {
|
|
bacpy(&conn->dst, dst);
|
|
} else {
|
|
conn = hci_conn_add(hdev, LE_LINK, dst, role);
|
|
if (!conn)
|
|
return ERR_PTR(-ENOMEM);
|
|
hci_conn_hold(conn);
|
|
conn->pending_sec_level = sec_level;
|
|
}
|
|
|
|
conn->dst_type = dst_type;
|
|
conn->sec_level = BT_SECURITY_LOW;
|
|
conn->conn_timeout = conn_timeout;
|
|
|
|
conn->state = BT_CONNECT;
|
|
clear_bit(HCI_CONN_SCANNING, &conn->flags);
|
|
|
|
err = hci_cmd_sync_queue(hdev, hci_connect_le_sync, conn,
|
|
create_le_conn_complete);
|
|
if (err) {
|
|
hci_conn_del(conn);
|
|
return ERR_PTR(err);
|
|
}
|
|
|
|
return conn;
|
|
}
|
|
|
|
static bool is_connected(struct hci_dev *hdev, bdaddr_t *addr, u8 type)
|
|
{
|
|
struct hci_conn *conn;
|
|
|
|
conn = hci_conn_hash_lookup_le(hdev, addr, type);
|
|
if (!conn)
|
|
return false;
|
|
|
|
if (conn->state != BT_CONNECTED)
|
|
return false;
|
|
|
|
return true;
|
|
}
|
|
|
|
/* This function requires the caller holds hdev->lock */
|
|
static int hci_explicit_conn_params_set(struct hci_dev *hdev,
|
|
bdaddr_t *addr, u8 addr_type)
|
|
{
|
|
struct hci_conn_params *params;
|
|
|
|
if (is_connected(hdev, addr, addr_type))
|
|
return -EISCONN;
|
|
|
|
params = hci_conn_params_lookup(hdev, addr, addr_type);
|
|
if (!params) {
|
|
params = hci_conn_params_add(hdev, addr, addr_type);
|
|
if (!params)
|
|
return -ENOMEM;
|
|
|
|
/* If we created new params, mark them to be deleted in
|
|
* hci_connect_le_scan_cleanup. It's different case than
|
|
* existing disabled params, those will stay after cleanup.
|
|
*/
|
|
params->auto_connect = HCI_AUTO_CONN_EXPLICIT;
|
|
}
|
|
|
|
/* We're trying to connect, so make sure params are at pend_le_conns */
|
|
if (params->auto_connect == HCI_AUTO_CONN_DISABLED ||
|
|
params->auto_connect == HCI_AUTO_CONN_REPORT ||
|
|
params->auto_connect == HCI_AUTO_CONN_EXPLICIT) {
|
|
list_del_init(¶ms->action);
|
|
list_add(¶ms->action, &hdev->pend_le_conns);
|
|
}
|
|
|
|
params->explicit_connect = true;
|
|
|
|
BT_DBG("addr %pMR (type %u) auto_connect %u", addr, addr_type,
|
|
params->auto_connect);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int qos_set_big(struct hci_dev *hdev, struct bt_iso_qos *qos)
|
|
{
|
|
struct iso_list_data data;
|
|
|
|
/* Allocate a BIG if not set */
|
|
if (qos->big == BT_ISO_QOS_BIG_UNSET) {
|
|
for (data.big = 0x00; data.big < 0xef; data.big++) {
|
|
data.count = 0;
|
|
data.bis = 0xff;
|
|
|
|
hci_conn_hash_list_state(hdev, bis_list, ISO_LINK,
|
|
BT_BOUND, &data);
|
|
if (!data.count)
|
|
break;
|
|
}
|
|
|
|
if (data.big == 0xef)
|
|
return -EADDRNOTAVAIL;
|
|
|
|
/* Update BIG */
|
|
qos->big = data.big;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int qos_set_bis(struct hci_dev *hdev, struct bt_iso_qos *qos)
|
|
{
|
|
struct iso_list_data data;
|
|
|
|
/* Allocate BIS if not set */
|
|
if (qos->bis == BT_ISO_QOS_BIS_UNSET) {
|
|
/* Find an unused adv set to advertise BIS, skip instance 0x00
|
|
* since it is reserved as general purpose set.
|
|
*/
|
|
for (data.bis = 0x01; data.bis < hdev->le_num_of_adv_sets;
|
|
data.bis++) {
|
|
data.count = 0;
|
|
|
|
hci_conn_hash_list_state(hdev, bis_list, ISO_LINK,
|
|
BT_BOUND, &data);
|
|
if (!data.count)
|
|
break;
|
|
}
|
|
|
|
if (data.bis == hdev->le_num_of_adv_sets)
|
|
return -EADDRNOTAVAIL;
|
|
|
|
/* Update BIS */
|
|
qos->bis = data.bis;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
/* This function requires the caller holds hdev->lock */
|
|
static struct hci_conn *hci_add_bis(struct hci_dev *hdev, bdaddr_t *dst,
|
|
struct bt_iso_qos *qos)
|
|
{
|
|
struct hci_conn *conn;
|
|
struct iso_list_data data;
|
|
int err;
|
|
|
|
/* Let's make sure that le is enabled.*/
|
|
if (!hci_dev_test_flag(hdev, HCI_LE_ENABLED)) {
|
|
if (lmp_le_capable(hdev))
|
|
return ERR_PTR(-ECONNREFUSED);
|
|
return ERR_PTR(-EOPNOTSUPP);
|
|
}
|
|
|
|
err = qos_set_big(hdev, qos);
|
|
if (err)
|
|
return ERR_PTR(err);
|
|
|
|
err = qos_set_bis(hdev, qos);
|
|
if (err)
|
|
return ERR_PTR(err);
|
|
|
|
data.big = qos->big;
|
|
data.bis = qos->bis;
|
|
data.count = 0;
|
|
|
|
/* Check if there is already a matching BIG/BIS */
|
|
hci_conn_hash_list_state(hdev, bis_list, ISO_LINK, BT_BOUND, &data);
|
|
if (data.count)
|
|
return ERR_PTR(-EADDRINUSE);
|
|
|
|
conn = hci_conn_hash_lookup_bis(hdev, dst, qos->big, qos->bis);
|
|
if (conn)
|
|
return ERR_PTR(-EADDRINUSE);
|
|
|
|
conn = hci_conn_add(hdev, ISO_LINK, dst, HCI_ROLE_MASTER);
|
|
if (!conn)
|
|
return ERR_PTR(-ENOMEM);
|
|
|
|
set_bit(HCI_CONN_PER_ADV, &conn->flags);
|
|
conn->state = BT_CONNECT;
|
|
|
|
hci_conn_hold(conn);
|
|
return conn;
|
|
}
|
|
|
|
/* This function requires the caller holds hdev->lock */
|
|
struct hci_conn *hci_connect_le_scan(struct hci_dev *hdev, bdaddr_t *dst,
|
|
u8 dst_type, u8 sec_level,
|
|
u16 conn_timeout,
|
|
enum conn_reasons conn_reason)
|
|
{
|
|
struct hci_conn *conn;
|
|
|
|
/* Let's make sure that le is enabled.*/
|
|
if (!hci_dev_test_flag(hdev, HCI_LE_ENABLED)) {
|
|
if (lmp_le_capable(hdev))
|
|
return ERR_PTR(-ECONNREFUSED);
|
|
|
|
return ERR_PTR(-EOPNOTSUPP);
|
|
}
|
|
|
|
/* Some devices send ATT messages as soon as the physical link is
|
|
* established. To be able to handle these ATT messages, the user-
|
|
* space first establishes the connection and then starts the pairing
|
|
* process.
|
|
*
|
|
* So if a hci_conn object already exists for the following connection
|
|
* attempt, we simply update pending_sec_level and auth_type fields
|
|
* and return the object found.
|
|
*/
|
|
conn = hci_conn_hash_lookup_le(hdev, dst, dst_type);
|
|
if (conn) {
|
|
if (conn->pending_sec_level < sec_level)
|
|
conn->pending_sec_level = sec_level;
|
|
goto done;
|
|
}
|
|
|
|
BT_DBG("requesting refresh of dst_addr");
|
|
|
|
conn = hci_conn_add(hdev, LE_LINK, dst, HCI_ROLE_MASTER);
|
|
if (!conn)
|
|
return ERR_PTR(-ENOMEM);
|
|
|
|
if (hci_explicit_conn_params_set(hdev, dst, dst_type) < 0) {
|
|
hci_conn_del(conn);
|
|
return ERR_PTR(-EBUSY);
|
|
}
|
|
|
|
conn->state = BT_CONNECT;
|
|
set_bit(HCI_CONN_SCANNING, &conn->flags);
|
|
conn->dst_type = dst_type;
|
|
conn->sec_level = BT_SECURITY_LOW;
|
|
conn->pending_sec_level = sec_level;
|
|
conn->conn_timeout = conn_timeout;
|
|
conn->conn_reason = conn_reason;
|
|
|
|
hci_update_passive_scan(hdev);
|
|
|
|
done:
|
|
hci_conn_hold(conn);
|
|
return conn;
|
|
}
|
|
|
|
struct hci_conn *hci_connect_acl(struct hci_dev *hdev, bdaddr_t *dst,
|
|
u8 sec_level, u8 auth_type,
|
|
enum conn_reasons conn_reason)
|
|
{
|
|
struct hci_conn *acl;
|
|
|
|
if (!hci_dev_test_flag(hdev, HCI_BREDR_ENABLED)) {
|
|
if (lmp_bredr_capable(hdev))
|
|
return ERR_PTR(-ECONNREFUSED);
|
|
|
|
return ERR_PTR(-EOPNOTSUPP);
|
|
}
|
|
|
|
acl = hci_conn_hash_lookup_ba(hdev, ACL_LINK, dst);
|
|
if (!acl) {
|
|
acl = hci_conn_add(hdev, ACL_LINK, dst, HCI_ROLE_MASTER);
|
|
if (!acl)
|
|
return ERR_PTR(-ENOMEM);
|
|
}
|
|
|
|
hci_conn_hold(acl);
|
|
|
|
acl->conn_reason = conn_reason;
|
|
if (acl->state == BT_OPEN || acl->state == BT_CLOSED) {
|
|
acl->sec_level = BT_SECURITY_LOW;
|
|
acl->pending_sec_level = sec_level;
|
|
acl->auth_type = auth_type;
|
|
hci_acl_create_connection(acl);
|
|
}
|
|
|
|
return acl;
|
|
}
|
|
|
|
struct hci_conn *hci_connect_sco(struct hci_dev *hdev, int type, bdaddr_t *dst,
|
|
__u16 setting, struct bt_codec *codec)
|
|
{
|
|
struct hci_conn *acl;
|
|
struct hci_conn *sco;
|
|
|
|
acl = hci_connect_acl(hdev, dst, BT_SECURITY_LOW, HCI_AT_NO_BONDING,
|
|
CONN_REASON_SCO_CONNECT);
|
|
if (IS_ERR(acl))
|
|
return acl;
|
|
|
|
sco = hci_conn_hash_lookup_ba(hdev, type, dst);
|
|
if (!sco) {
|
|
sco = hci_conn_add(hdev, type, dst, HCI_ROLE_MASTER);
|
|
if (!sco) {
|
|
hci_conn_drop(acl);
|
|
return ERR_PTR(-ENOMEM);
|
|
}
|
|
}
|
|
|
|
acl->link = sco;
|
|
sco->link = acl;
|
|
|
|
hci_conn_hold(sco);
|
|
|
|
sco->setting = setting;
|
|
sco->codec = *codec;
|
|
|
|
if (acl->state == BT_CONNECTED &&
|
|
(sco->state == BT_OPEN || sco->state == BT_CLOSED)) {
|
|
set_bit(HCI_CONN_POWER_SAVE, &acl->flags);
|
|
hci_conn_enter_active_mode(acl, BT_POWER_FORCE_ACTIVE_ON);
|
|
|
|
if (test_bit(HCI_CONN_MODE_CHANGE_PEND, &acl->flags)) {
|
|
/* defer SCO setup until mode change completed */
|
|
set_bit(HCI_CONN_SCO_SETUP_PEND, &acl->flags);
|
|
return sco;
|
|
}
|
|
|
|
hci_sco_setup(acl, 0x00);
|
|
}
|
|
|
|
return sco;
|
|
}
|
|
|
|
static void cis_add(struct iso_list_data *d, struct bt_iso_qos *qos)
|
|
{
|
|
struct hci_cis_params *cis = &d->pdu.cis[d->pdu.cp.num_cis];
|
|
|
|
cis->cis_id = qos->cis;
|
|
cis->c_sdu = cpu_to_le16(qos->out.sdu);
|
|
cis->p_sdu = cpu_to_le16(qos->in.sdu);
|
|
cis->c_phy = qos->out.phy ? qos->out.phy : qos->in.phy;
|
|
cis->p_phy = qos->in.phy ? qos->in.phy : qos->out.phy;
|
|
cis->c_rtn = qos->out.rtn;
|
|
cis->p_rtn = qos->in.rtn;
|
|
|
|
d->pdu.cp.num_cis++;
|
|
}
|
|
|
|
static void cis_list(struct hci_conn *conn, void *data)
|
|
{
|
|
struct iso_list_data *d = data;
|
|
|
|
/* Skip if broadcast/ANY address */
|
|
if (!bacmp(&conn->dst, BDADDR_ANY))
|
|
return;
|
|
|
|
if (d->cig != conn->iso_qos.cig || d->cis == BT_ISO_QOS_CIS_UNSET ||
|
|
d->cis != conn->iso_qos.cis)
|
|
return;
|
|
|
|
d->count++;
|
|
|
|
if (d->pdu.cp.cig_id == BT_ISO_QOS_CIG_UNSET ||
|
|
d->count >= ARRAY_SIZE(d->pdu.cis))
|
|
return;
|
|
|
|
cis_add(d, &conn->iso_qos);
|
|
}
|
|
|
|
static int hci_le_create_big(struct hci_conn *conn, struct bt_iso_qos *qos)
|
|
{
|
|
struct hci_dev *hdev = conn->hdev;
|
|
struct hci_cp_le_create_big cp;
|
|
|
|
memset(&cp, 0, sizeof(cp));
|
|
|
|
cp.handle = qos->big;
|
|
cp.adv_handle = qos->bis;
|
|
cp.num_bis = 0x01;
|
|
hci_cpu_to_le24(qos->out.interval, cp.bis.sdu_interval);
|
|
cp.bis.sdu = cpu_to_le16(qos->out.sdu);
|
|
cp.bis.latency = cpu_to_le16(qos->out.latency);
|
|
cp.bis.rtn = qos->out.rtn;
|
|
cp.bis.phy = qos->out.phy;
|
|
cp.bis.packing = qos->packing;
|
|
cp.bis.framing = qos->framing;
|
|
cp.bis.encryption = 0x00;
|
|
memset(&cp.bis.bcode, 0, sizeof(cp.bis.bcode));
|
|
|
|
return hci_send_cmd(hdev, HCI_OP_LE_CREATE_BIG, sizeof(cp), &cp);
|
|
}
|
|
|
|
static bool hci_le_set_cig_params(struct hci_conn *conn, struct bt_iso_qos *qos)
|
|
{
|
|
struct hci_dev *hdev = conn->hdev;
|
|
struct iso_list_data data;
|
|
|
|
memset(&data, 0, sizeof(data));
|
|
|
|
/* Allocate a CIG if not set */
|
|
if (qos->cig == BT_ISO_QOS_CIG_UNSET) {
|
|
for (data.cig = 0x00; data.cig < 0xff; data.cig++) {
|
|
data.count = 0;
|
|
data.cis = 0xff;
|
|
|
|
hci_conn_hash_list_state(hdev, cis_list, ISO_LINK,
|
|
BT_BOUND, &data);
|
|
if (data.count)
|
|
continue;
|
|
|
|
hci_conn_hash_list_state(hdev, cis_list, ISO_LINK,
|
|
BT_CONNECTED, &data);
|
|
if (!data.count)
|
|
break;
|
|
}
|
|
|
|
if (data.cig == 0xff)
|
|
return false;
|
|
|
|
/* Update CIG */
|
|
qos->cig = data.cig;
|
|
}
|
|
|
|
data.pdu.cp.cig_id = qos->cig;
|
|
hci_cpu_to_le24(qos->out.interval, data.pdu.cp.c_interval);
|
|
hci_cpu_to_le24(qos->in.interval, data.pdu.cp.p_interval);
|
|
data.pdu.cp.sca = qos->sca;
|
|
data.pdu.cp.packing = qos->packing;
|
|
data.pdu.cp.framing = qos->framing;
|
|
data.pdu.cp.c_latency = cpu_to_le16(qos->out.latency);
|
|
data.pdu.cp.p_latency = cpu_to_le16(qos->in.latency);
|
|
|
|
if (qos->cis != BT_ISO_QOS_CIS_UNSET) {
|
|
data.count = 0;
|
|
data.cig = qos->cig;
|
|
data.cis = qos->cis;
|
|
|
|
hci_conn_hash_list_state(hdev, cis_list, ISO_LINK, BT_BOUND,
|
|
&data);
|
|
if (data.count)
|
|
return false;
|
|
|
|
cis_add(&data, qos);
|
|
}
|
|
|
|
/* Reprogram all CIS(s) with the same CIG */
|
|
for (data.cig = qos->cig, data.cis = 0x00; data.cis < 0x11;
|
|
data.cis++) {
|
|
data.count = 0;
|
|
|
|
hci_conn_hash_list_state(hdev, cis_list, ISO_LINK, BT_BOUND,
|
|
&data);
|
|
if (data.count)
|
|
continue;
|
|
|
|
/* Allocate a CIS if not set */
|
|
if (qos->cis == BT_ISO_QOS_CIS_UNSET) {
|
|
/* Update CIS */
|
|
qos->cis = data.cis;
|
|
cis_add(&data, qos);
|
|
}
|
|
}
|
|
|
|
if (qos->cis == BT_ISO_QOS_CIS_UNSET || !data.pdu.cp.num_cis)
|
|
return false;
|
|
|
|
if (hci_send_cmd(hdev, HCI_OP_LE_SET_CIG_PARAMS,
|
|
sizeof(data.pdu.cp) +
|
|
(data.pdu.cp.num_cis * sizeof(*data.pdu.cis)),
|
|
&data.pdu) < 0)
|
|
return false;
|
|
|
|
return true;
|
|
}
|
|
|
|
struct hci_conn *hci_bind_cis(struct hci_dev *hdev, bdaddr_t *dst,
|
|
__u8 dst_type, struct bt_iso_qos *qos)
|
|
{
|
|
struct hci_conn *cis;
|
|
|
|
cis = hci_conn_hash_lookup_cis(hdev, dst, dst_type);
|
|
if (!cis) {
|
|
cis = hci_conn_add(hdev, ISO_LINK, dst, HCI_ROLE_MASTER);
|
|
if (!cis)
|
|
return ERR_PTR(-ENOMEM);
|
|
cis->cleanup = cis_cleanup;
|
|
cis->dst_type = dst_type;
|
|
}
|
|
|
|
if (cis->state == BT_CONNECTED)
|
|
return cis;
|
|
|
|
/* Check if CIS has been set and the settings matches */
|
|
if (cis->state == BT_BOUND &&
|
|
!memcmp(&cis->iso_qos, qos, sizeof(*qos)))
|
|
return cis;
|
|
|
|
/* Update LINK PHYs according to QoS preference */
|
|
cis->le_tx_phy = qos->out.phy;
|
|
cis->le_rx_phy = qos->in.phy;
|
|
|
|
/* If output interval is not set use the input interval as it cannot be
|
|
* 0x000000.
|
|
*/
|
|
if (!qos->out.interval)
|
|
qos->out.interval = qos->in.interval;
|
|
|
|
/* If input interval is not set use the output interval as it cannot be
|
|
* 0x000000.
|
|
*/
|
|
if (!qos->in.interval)
|
|
qos->in.interval = qos->out.interval;
|
|
|
|
/* If output latency is not set use the input latency as it cannot be
|
|
* 0x0000.
|
|
*/
|
|
if (!qos->out.latency)
|
|
qos->out.latency = qos->in.latency;
|
|
|
|
/* If input latency is not set use the output latency as it cannot be
|
|
* 0x0000.
|
|
*/
|
|
if (!qos->in.latency)
|
|
qos->in.latency = qos->out.latency;
|
|
|
|
if (!hci_le_set_cig_params(cis, qos)) {
|
|
hci_conn_drop(cis);
|
|
return ERR_PTR(-EINVAL);
|
|
}
|
|
|
|
cis->iso_qos = *qos;
|
|
cis->state = BT_BOUND;
|
|
|
|
return cis;
|
|
}
|
|
|
|
bool hci_iso_setup_path(struct hci_conn *conn)
|
|
{
|
|
struct hci_dev *hdev = conn->hdev;
|
|
struct hci_cp_le_setup_iso_path cmd;
|
|
|
|
memset(&cmd, 0, sizeof(cmd));
|
|
|
|
if (conn->iso_qos.out.sdu) {
|
|
cmd.handle = cpu_to_le16(conn->handle);
|
|
cmd.direction = 0x00; /* Input (Host to Controller) */
|
|
cmd.path = 0x00; /* HCI path if enabled */
|
|
cmd.codec = 0x03; /* Transparent Data */
|
|
|
|
if (hci_send_cmd(hdev, HCI_OP_LE_SETUP_ISO_PATH, sizeof(cmd),
|
|
&cmd) < 0)
|
|
return false;
|
|
}
|
|
|
|
if (conn->iso_qos.in.sdu) {
|
|
cmd.handle = cpu_to_le16(conn->handle);
|
|
cmd.direction = 0x01; /* Output (Controller to Host) */
|
|
cmd.path = 0x00; /* HCI path if enabled */
|
|
cmd.codec = 0x03; /* Transparent Data */
|
|
|
|
if (hci_send_cmd(hdev, HCI_OP_LE_SETUP_ISO_PATH, sizeof(cmd),
|
|
&cmd) < 0)
|
|
return false;
|
|
}
|
|
|
|
return true;
|
|
}
|
|
|
|
static int hci_create_cis_sync(struct hci_dev *hdev, void *data)
|
|
{
|
|
struct {
|
|
struct hci_cp_le_create_cis cp;
|
|
struct hci_cis cis[0x1f];
|
|
} cmd;
|
|
struct hci_conn *conn = data;
|
|
u8 cig;
|
|
|
|
memset(&cmd, 0, sizeof(cmd));
|
|
cmd.cis[0].acl_handle = cpu_to_le16(conn->link->handle);
|
|
cmd.cis[0].cis_handle = cpu_to_le16(conn->handle);
|
|
cmd.cp.num_cis++;
|
|
cig = conn->iso_qos.cig;
|
|
|
|
hci_dev_lock(hdev);
|
|
|
|
rcu_read_lock();
|
|
|
|
list_for_each_entry_rcu(conn, &hdev->conn_hash.list, list) {
|
|
struct hci_cis *cis = &cmd.cis[cmd.cp.num_cis];
|
|
|
|
if (conn == data || conn->type != ISO_LINK ||
|
|
conn->state == BT_CONNECTED || conn->iso_qos.cig != cig)
|
|
continue;
|
|
|
|
/* Check if all CIS(s) belonging to a CIG are ready */
|
|
if (!conn->link || conn->link->state != BT_CONNECTED ||
|
|
conn->state != BT_CONNECT) {
|
|
cmd.cp.num_cis = 0;
|
|
break;
|
|
}
|
|
|
|
/* Group all CIS with state BT_CONNECT since the spec don't
|
|
* allow to send them individually:
|
|
*
|
|
* BLUETOOTH CORE SPECIFICATION Version 5.3 | Vol 4, Part E
|
|
* page 2566:
|
|
*
|
|
* If the Host issues this command before all the
|
|
* HCI_LE_CIS_Established events from the previous use of the
|
|
* command have been generated, the Controller shall return the
|
|
* error code Command Disallowed (0x0C).
|
|
*/
|
|
cis->acl_handle = cpu_to_le16(conn->link->handle);
|
|
cis->cis_handle = cpu_to_le16(conn->handle);
|
|
cmd.cp.num_cis++;
|
|
}
|
|
|
|
rcu_read_unlock();
|
|
|
|
hci_dev_unlock(hdev);
|
|
|
|
if (!cmd.cp.num_cis)
|
|
return 0;
|
|
|
|
return hci_send_cmd(hdev, HCI_OP_LE_CREATE_CIS, sizeof(cmd.cp) +
|
|
sizeof(cmd.cis[0]) * cmd.cp.num_cis, &cmd);
|
|
}
|
|
|
|
int hci_le_create_cis(struct hci_conn *conn)
|
|
{
|
|
struct hci_conn *cis;
|
|
struct hci_dev *hdev = conn->hdev;
|
|
int err;
|
|
|
|
switch (conn->type) {
|
|
case LE_LINK:
|
|
if (!conn->link || conn->state != BT_CONNECTED)
|
|
return -EINVAL;
|
|
cis = conn->link;
|
|
break;
|
|
case ISO_LINK:
|
|
cis = conn;
|
|
break;
|
|
default:
|
|
return -EINVAL;
|
|
}
|
|
|
|
if (cis->state == BT_CONNECT)
|
|
return 0;
|
|
|
|
/* Queue Create CIS */
|
|
err = hci_cmd_sync_queue(hdev, hci_create_cis_sync, cis, NULL);
|
|
if (err)
|
|
return err;
|
|
|
|
cis->state = BT_CONNECT;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void hci_iso_qos_setup(struct hci_dev *hdev, struct hci_conn *conn,
|
|
struct bt_iso_io_qos *qos, __u8 phy)
|
|
{
|
|
/* Only set MTU if PHY is enabled */
|
|
if (!qos->sdu && qos->phy) {
|
|
if (hdev->iso_mtu > 0)
|
|
qos->sdu = hdev->iso_mtu;
|
|
else if (hdev->le_mtu > 0)
|
|
qos->sdu = hdev->le_mtu;
|
|
else
|
|
qos->sdu = hdev->acl_mtu;
|
|
}
|
|
|
|
/* Use the same PHY as ACL if set to any */
|
|
if (qos->phy == BT_ISO_PHY_ANY)
|
|
qos->phy = phy;
|
|
|
|
/* Use LE ACL connection interval if not set */
|
|
if (!qos->interval)
|
|
/* ACL interval unit in 1.25 ms to us */
|
|
qos->interval = conn->le_conn_interval * 1250;
|
|
|
|
/* Use LE ACL connection latency if not set */
|
|
if (!qos->latency)
|
|
qos->latency = conn->le_conn_latency;
|
|
}
|
|
|
|
static void hci_bind_bis(struct hci_conn *conn,
|
|
struct bt_iso_qos *qos)
|
|
{
|
|
/* Update LINK PHYs according to QoS preference */
|
|
conn->le_tx_phy = qos->out.phy;
|
|
conn->le_tx_phy = qos->out.phy;
|
|
conn->iso_qos = *qos;
|
|
conn->state = BT_BOUND;
|
|
}
|
|
|
|
static int create_big_sync(struct hci_dev *hdev, void *data)
|
|
{
|
|
struct hci_conn *conn = data;
|
|
struct bt_iso_qos *qos = &conn->iso_qos;
|
|
u16 interval, sync_interval = 0;
|
|
u32 flags = 0;
|
|
int err;
|
|
|
|
if (qos->out.phy == 0x02)
|
|
flags |= MGMT_ADV_FLAG_SEC_2M;
|
|
|
|
/* Align intervals */
|
|
interval = qos->out.interval / 1250;
|
|
|
|
if (qos->bis)
|
|
sync_interval = qos->sync_interval * 1600;
|
|
|
|
err = hci_start_per_adv_sync(hdev, qos->bis, conn->le_per_adv_data_len,
|
|
conn->le_per_adv_data, flags, interval,
|
|
interval, sync_interval);
|
|
if (err)
|
|
return err;
|
|
|
|
return hci_le_create_big(conn, &conn->iso_qos);
|
|
}
|
|
|
|
static void create_pa_complete(struct hci_dev *hdev, void *data, int err)
|
|
{
|
|
struct hci_cp_le_pa_create_sync *cp = data;
|
|
|
|
bt_dev_dbg(hdev, "");
|
|
|
|
if (err)
|
|
bt_dev_err(hdev, "Unable to create PA: %d", err);
|
|
|
|
kfree(cp);
|
|
}
|
|
|
|
static int create_pa_sync(struct hci_dev *hdev, void *data)
|
|
{
|
|
struct hci_cp_le_pa_create_sync *cp = data;
|
|
int err;
|
|
|
|
err = __hci_cmd_sync_status(hdev, HCI_OP_LE_PA_CREATE_SYNC,
|
|
sizeof(*cp), cp, HCI_CMD_TIMEOUT);
|
|
if (err) {
|
|
hci_dev_clear_flag(hdev, HCI_PA_SYNC);
|
|
return err;
|
|
}
|
|
|
|
return hci_update_passive_scan_sync(hdev);
|
|
}
|
|
|
|
int hci_pa_create_sync(struct hci_dev *hdev, bdaddr_t *dst, __u8 dst_type,
|
|
__u8 sid)
|
|
{
|
|
struct hci_cp_le_pa_create_sync *cp;
|
|
|
|
if (hci_dev_test_and_set_flag(hdev, HCI_PA_SYNC))
|
|
return -EBUSY;
|
|
|
|
cp = kzalloc(sizeof(*cp), GFP_KERNEL);
|
|
if (!cp) {
|
|
hci_dev_clear_flag(hdev, HCI_PA_SYNC);
|
|
return -ENOMEM;
|
|
}
|
|
|
|
cp->sid = sid;
|
|
cp->addr_type = dst_type;
|
|
bacpy(&cp->addr, dst);
|
|
|
|
/* Queue start pa_create_sync and scan */
|
|
return hci_cmd_sync_queue(hdev, create_pa_sync, cp, create_pa_complete);
|
|
}
|
|
|
|
int hci_le_big_create_sync(struct hci_dev *hdev, struct bt_iso_qos *qos,
|
|
__u16 sync_handle, __u8 num_bis, __u8 bis[])
|
|
{
|
|
struct _packed {
|
|
struct hci_cp_le_big_create_sync cp;
|
|
__u8 bis[0x11];
|
|
} pdu;
|
|
int err;
|
|
|
|
if (num_bis > sizeof(pdu.bis))
|
|
return -EINVAL;
|
|
|
|
err = qos_set_big(hdev, qos);
|
|
if (err)
|
|
return err;
|
|
|
|
memset(&pdu, 0, sizeof(pdu));
|
|
pdu.cp.handle = qos->big;
|
|
pdu.cp.sync_handle = cpu_to_le16(sync_handle);
|
|
pdu.cp.num_bis = num_bis;
|
|
memcpy(pdu.bis, bis, num_bis);
|
|
|
|
return hci_send_cmd(hdev, HCI_OP_LE_BIG_CREATE_SYNC,
|
|
sizeof(pdu.cp) + num_bis, &pdu);
|
|
}
|
|
|
|
static void create_big_complete(struct hci_dev *hdev, void *data, int err)
|
|
{
|
|
struct hci_conn *conn = data;
|
|
|
|
bt_dev_dbg(hdev, "conn %p", conn);
|
|
|
|
if (err) {
|
|
bt_dev_err(hdev, "Unable to create BIG: %d", err);
|
|
hci_connect_cfm(conn, err);
|
|
hci_conn_del(conn);
|
|
}
|
|
}
|
|
|
|
struct hci_conn *hci_connect_bis(struct hci_dev *hdev, bdaddr_t *dst,
|
|
__u8 dst_type, struct bt_iso_qos *qos,
|
|
__u8 base_len, __u8 *base)
|
|
{
|
|
struct hci_conn *conn;
|
|
int err;
|
|
|
|
/* We need hci_conn object using the BDADDR_ANY as dst */
|
|
conn = hci_add_bis(hdev, dst, qos);
|
|
if (IS_ERR(conn))
|
|
return conn;
|
|
|
|
hci_bind_bis(conn, qos);
|
|
|
|
/* Add Basic Announcement into Peridic Adv Data if BASE is set */
|
|
if (base_len && base) {
|
|
base_len = eir_append_service_data(conn->le_per_adv_data, 0,
|
|
0x1851, base, base_len);
|
|
conn->le_per_adv_data_len = base_len;
|
|
}
|
|
|
|
/* Queue start periodic advertising and create BIG */
|
|
err = hci_cmd_sync_queue(hdev, create_big_sync, conn,
|
|
create_big_complete);
|
|
if (err < 0) {
|
|
hci_conn_drop(conn);
|
|
return ERR_PTR(err);
|
|
}
|
|
|
|
hci_iso_qos_setup(hdev, conn, &qos->out,
|
|
conn->le_tx_phy ? conn->le_tx_phy :
|
|
hdev->le_tx_def_phys);
|
|
|
|
return conn;
|
|
}
|
|
|
|
struct hci_conn *hci_connect_cis(struct hci_dev *hdev, bdaddr_t *dst,
|
|
__u8 dst_type, struct bt_iso_qos *qos)
|
|
{
|
|
struct hci_conn *le;
|
|
struct hci_conn *cis;
|
|
|
|
if (hci_dev_test_flag(hdev, HCI_ADVERTISING))
|
|
le = hci_connect_le(hdev, dst, dst_type, false,
|
|
BT_SECURITY_LOW,
|
|
HCI_LE_CONN_TIMEOUT,
|
|
HCI_ROLE_SLAVE);
|
|
else
|
|
le = hci_connect_le_scan(hdev, dst, dst_type,
|
|
BT_SECURITY_LOW,
|
|
HCI_LE_CONN_TIMEOUT,
|
|
CONN_REASON_ISO_CONNECT);
|
|
if (IS_ERR(le))
|
|
return le;
|
|
|
|
hci_iso_qos_setup(hdev, le, &qos->out,
|
|
le->le_tx_phy ? le->le_tx_phy : hdev->le_tx_def_phys);
|
|
hci_iso_qos_setup(hdev, le, &qos->in,
|
|
le->le_rx_phy ? le->le_rx_phy : hdev->le_rx_def_phys);
|
|
|
|
cis = hci_bind_cis(hdev, dst, dst_type, qos);
|
|
if (IS_ERR(cis)) {
|
|
hci_conn_drop(le);
|
|
return cis;
|
|
}
|
|
|
|
le->link = cis;
|
|
cis->link = le;
|
|
|
|
hci_conn_hold(cis);
|
|
|
|
/* If LE is already connected and CIS handle is already set proceed to
|
|
* Create CIS immediately.
|
|
*/
|
|
if (le->state == BT_CONNECTED && cis->handle != HCI_CONN_HANDLE_UNSET)
|
|
hci_le_create_cis(le);
|
|
|
|
return cis;
|
|
}
|
|
|
|
/* Check link security requirement */
|
|
int hci_conn_check_link_mode(struct hci_conn *conn)
|
|
{
|
|
BT_DBG("hcon %p", conn);
|
|
|
|
/* In Secure Connections Only mode, it is required that Secure
|
|
* Connections is used and the link is encrypted with AES-CCM
|
|
* using a P-256 authenticated combination key.
|
|
*/
|
|
if (hci_dev_test_flag(conn->hdev, HCI_SC_ONLY)) {
|
|
if (!hci_conn_sc_enabled(conn) ||
|
|
!test_bit(HCI_CONN_AES_CCM, &conn->flags) ||
|
|
conn->key_type != HCI_LK_AUTH_COMBINATION_P256)
|
|
return 0;
|
|
}
|
|
|
|
/* AES encryption is required for Level 4:
|
|
*
|
|
* BLUETOOTH CORE SPECIFICATION Version 5.2 | Vol 3, Part C
|
|
* page 1319:
|
|
*
|
|
* 128-bit equivalent strength for link and encryption keys
|
|
* required using FIPS approved algorithms (E0 not allowed,
|
|
* SAFER+ not allowed, and P-192 not allowed; encryption key
|
|
* not shortened)
|
|
*/
|
|
if (conn->sec_level == BT_SECURITY_FIPS &&
|
|
!test_bit(HCI_CONN_AES_CCM, &conn->flags)) {
|
|
bt_dev_err(conn->hdev,
|
|
"Invalid security: Missing AES-CCM usage");
|
|
return 0;
|
|
}
|
|
|
|
if (hci_conn_ssp_enabled(conn) &&
|
|
!test_bit(HCI_CONN_ENCRYPT, &conn->flags))
|
|
return 0;
|
|
|
|
return 1;
|
|
}
|
|
|
|
/* Authenticate remote device */
|
|
static int hci_conn_auth(struct hci_conn *conn, __u8 sec_level, __u8 auth_type)
|
|
{
|
|
BT_DBG("hcon %p", conn);
|
|
|
|
if (conn->pending_sec_level > sec_level)
|
|
sec_level = conn->pending_sec_level;
|
|
|
|
if (sec_level > conn->sec_level)
|
|
conn->pending_sec_level = sec_level;
|
|
else if (test_bit(HCI_CONN_AUTH, &conn->flags))
|
|
return 1;
|
|
|
|
/* Make sure we preserve an existing MITM requirement*/
|
|
auth_type |= (conn->auth_type & 0x01);
|
|
|
|
conn->auth_type = auth_type;
|
|
|
|
if (!test_and_set_bit(HCI_CONN_AUTH_PEND, &conn->flags)) {
|
|
struct hci_cp_auth_requested cp;
|
|
|
|
cp.handle = cpu_to_le16(conn->handle);
|
|
hci_send_cmd(conn->hdev, HCI_OP_AUTH_REQUESTED,
|
|
sizeof(cp), &cp);
|
|
|
|
/* If we're already encrypted set the REAUTH_PEND flag,
|
|
* otherwise set the ENCRYPT_PEND.
|
|
*/
|
|
if (test_bit(HCI_CONN_ENCRYPT, &conn->flags))
|
|
set_bit(HCI_CONN_REAUTH_PEND, &conn->flags);
|
|
else
|
|
set_bit(HCI_CONN_ENCRYPT_PEND, &conn->flags);
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
/* Encrypt the link */
|
|
static void hci_conn_encrypt(struct hci_conn *conn)
|
|
{
|
|
BT_DBG("hcon %p", conn);
|
|
|
|
if (!test_and_set_bit(HCI_CONN_ENCRYPT_PEND, &conn->flags)) {
|
|
struct hci_cp_set_conn_encrypt cp;
|
|
cp.handle = cpu_to_le16(conn->handle);
|
|
cp.encrypt = 0x01;
|
|
hci_send_cmd(conn->hdev, HCI_OP_SET_CONN_ENCRYPT, sizeof(cp),
|
|
&cp);
|
|
}
|
|
}
|
|
|
|
/* Enable security */
|
|
int hci_conn_security(struct hci_conn *conn, __u8 sec_level, __u8 auth_type,
|
|
bool initiator)
|
|
{
|
|
BT_DBG("hcon %p", conn);
|
|
|
|
if (conn->type == LE_LINK)
|
|
return smp_conn_security(conn, sec_level);
|
|
|
|
/* For sdp we don't need the link key. */
|
|
if (sec_level == BT_SECURITY_SDP)
|
|
return 1;
|
|
|
|
/* For non 2.1 devices and low security level we don't need the link
|
|
key. */
|
|
if (sec_level == BT_SECURITY_LOW && !hci_conn_ssp_enabled(conn))
|
|
return 1;
|
|
|
|
/* For other security levels we need the link key. */
|
|
if (!test_bit(HCI_CONN_AUTH, &conn->flags))
|
|
goto auth;
|
|
|
|
/* An authenticated FIPS approved combination key has sufficient
|
|
* security for security level 4. */
|
|
if (conn->key_type == HCI_LK_AUTH_COMBINATION_P256 &&
|
|
sec_level == BT_SECURITY_FIPS)
|
|
goto encrypt;
|
|
|
|
/* An authenticated combination key has sufficient security for
|
|
security level 3. */
|
|
if ((conn->key_type == HCI_LK_AUTH_COMBINATION_P192 ||
|
|
conn->key_type == HCI_LK_AUTH_COMBINATION_P256) &&
|
|
sec_level == BT_SECURITY_HIGH)
|
|
goto encrypt;
|
|
|
|
/* An unauthenticated combination key has sufficient security for
|
|
security level 1 and 2. */
|
|
if ((conn->key_type == HCI_LK_UNAUTH_COMBINATION_P192 ||
|
|
conn->key_type == HCI_LK_UNAUTH_COMBINATION_P256) &&
|
|
(sec_level == BT_SECURITY_MEDIUM || sec_level == BT_SECURITY_LOW))
|
|
goto encrypt;
|
|
|
|
/* A combination key has always sufficient security for the security
|
|
levels 1 or 2. High security level requires the combination key
|
|
is generated using maximum PIN code length (16).
|
|
For pre 2.1 units. */
|
|
if (conn->key_type == HCI_LK_COMBINATION &&
|
|
(sec_level == BT_SECURITY_MEDIUM || sec_level == BT_SECURITY_LOW ||
|
|
conn->pin_length == 16))
|
|
goto encrypt;
|
|
|
|
auth:
|
|
if (test_bit(HCI_CONN_ENCRYPT_PEND, &conn->flags))
|
|
return 0;
|
|
|
|
if (initiator)
|
|
set_bit(HCI_CONN_AUTH_INITIATOR, &conn->flags);
|
|
|
|
if (!hci_conn_auth(conn, sec_level, auth_type))
|
|
return 0;
|
|
|
|
encrypt:
|
|
if (test_bit(HCI_CONN_ENCRYPT, &conn->flags)) {
|
|
/* Ensure that the encryption key size has been read,
|
|
* otherwise stall the upper layer responses.
|
|
*/
|
|
if (!conn->enc_key_size)
|
|
return 0;
|
|
|
|
/* Nothing else needed, all requirements are met */
|
|
return 1;
|
|
}
|
|
|
|
hci_conn_encrypt(conn);
|
|
return 0;
|
|
}
|
|
EXPORT_SYMBOL(hci_conn_security);
|
|
|
|
/* Check secure link requirement */
|
|
int hci_conn_check_secure(struct hci_conn *conn, __u8 sec_level)
|
|
{
|
|
BT_DBG("hcon %p", conn);
|
|
|
|
/* Accept if non-secure or higher security level is required */
|
|
if (sec_level != BT_SECURITY_HIGH && sec_level != BT_SECURITY_FIPS)
|
|
return 1;
|
|
|
|
/* Accept if secure or higher security level is already present */
|
|
if (conn->sec_level == BT_SECURITY_HIGH ||
|
|
conn->sec_level == BT_SECURITY_FIPS)
|
|
return 1;
|
|
|
|
/* Reject not secure link */
|
|
return 0;
|
|
}
|
|
EXPORT_SYMBOL(hci_conn_check_secure);
|
|
|
|
/* Switch role */
|
|
int hci_conn_switch_role(struct hci_conn *conn, __u8 role)
|
|
{
|
|
BT_DBG("hcon %p", conn);
|
|
|
|
if (role == conn->role)
|
|
return 1;
|
|
|
|
if (!test_and_set_bit(HCI_CONN_RSWITCH_PEND, &conn->flags)) {
|
|
struct hci_cp_switch_role cp;
|
|
bacpy(&cp.bdaddr, &conn->dst);
|
|
cp.role = role;
|
|
hci_send_cmd(conn->hdev, HCI_OP_SWITCH_ROLE, sizeof(cp), &cp);
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
EXPORT_SYMBOL(hci_conn_switch_role);
|
|
|
|
/* Enter active mode */
|
|
void hci_conn_enter_active_mode(struct hci_conn *conn, __u8 force_active)
|
|
{
|
|
struct hci_dev *hdev = conn->hdev;
|
|
|
|
BT_DBG("hcon %p mode %d", conn, conn->mode);
|
|
|
|
if (conn->mode != HCI_CM_SNIFF)
|
|
goto timer;
|
|
|
|
if (!test_bit(HCI_CONN_POWER_SAVE, &conn->flags) && !force_active)
|
|
goto timer;
|
|
|
|
if (!test_and_set_bit(HCI_CONN_MODE_CHANGE_PEND, &conn->flags)) {
|
|
struct hci_cp_exit_sniff_mode cp;
|
|
cp.handle = cpu_to_le16(conn->handle);
|
|
hci_send_cmd(hdev, HCI_OP_EXIT_SNIFF_MODE, sizeof(cp), &cp);
|
|
}
|
|
|
|
timer:
|
|
if (hdev->idle_timeout > 0)
|
|
queue_delayed_work(hdev->workqueue, &conn->idle_work,
|
|
msecs_to_jiffies(hdev->idle_timeout));
|
|
}
|
|
|
|
/* Drop all connection on the device */
|
|
void hci_conn_hash_flush(struct hci_dev *hdev)
|
|
{
|
|
struct hci_conn_hash *h = &hdev->conn_hash;
|
|
struct hci_conn *c, *n;
|
|
|
|
BT_DBG("hdev %s", hdev->name);
|
|
|
|
list_for_each_entry_safe(c, n, &h->list, list) {
|
|
c->state = BT_CLOSED;
|
|
|
|
hci_disconn_cfm(c, HCI_ERROR_LOCAL_HOST_TERM);
|
|
hci_conn_del(c);
|
|
}
|
|
}
|
|
|
|
/* Check pending connect attempts */
|
|
void hci_conn_check_pending(struct hci_dev *hdev)
|
|
{
|
|
struct hci_conn *conn;
|
|
|
|
BT_DBG("hdev %s", hdev->name);
|
|
|
|
hci_dev_lock(hdev);
|
|
|
|
conn = hci_conn_hash_lookup_state(hdev, ACL_LINK, BT_CONNECT2);
|
|
if (conn)
|
|
hci_acl_create_connection(conn);
|
|
|
|
hci_dev_unlock(hdev);
|
|
}
|
|
|
|
static u32 get_link_mode(struct hci_conn *conn)
|
|
{
|
|
u32 link_mode = 0;
|
|
|
|
if (conn->role == HCI_ROLE_MASTER)
|
|
link_mode |= HCI_LM_MASTER;
|
|
|
|
if (test_bit(HCI_CONN_ENCRYPT, &conn->flags))
|
|
link_mode |= HCI_LM_ENCRYPT;
|
|
|
|
if (test_bit(HCI_CONN_AUTH, &conn->flags))
|
|
link_mode |= HCI_LM_AUTH;
|
|
|
|
if (test_bit(HCI_CONN_SECURE, &conn->flags))
|
|
link_mode |= HCI_LM_SECURE;
|
|
|
|
if (test_bit(HCI_CONN_FIPS, &conn->flags))
|
|
link_mode |= HCI_LM_FIPS;
|
|
|
|
return link_mode;
|
|
}
|
|
|
|
int hci_get_conn_list(void __user *arg)
|
|
{
|
|
struct hci_conn *c;
|
|
struct hci_conn_list_req req, *cl;
|
|
struct hci_conn_info *ci;
|
|
struct hci_dev *hdev;
|
|
int n = 0, size, err;
|
|
|
|
if (copy_from_user(&req, arg, sizeof(req)))
|
|
return -EFAULT;
|
|
|
|
if (!req.conn_num || req.conn_num > (PAGE_SIZE * 2) / sizeof(*ci))
|
|
return -EINVAL;
|
|
|
|
size = sizeof(req) + req.conn_num * sizeof(*ci);
|
|
|
|
cl = kmalloc(size, GFP_KERNEL);
|
|
if (!cl)
|
|
return -ENOMEM;
|
|
|
|
hdev = hci_dev_get(req.dev_id);
|
|
if (!hdev) {
|
|
kfree(cl);
|
|
return -ENODEV;
|
|
}
|
|
|
|
ci = cl->conn_info;
|
|
|
|
hci_dev_lock(hdev);
|
|
list_for_each_entry(c, &hdev->conn_hash.list, list) {
|
|
bacpy(&(ci + n)->bdaddr, &c->dst);
|
|
(ci + n)->handle = c->handle;
|
|
(ci + n)->type = c->type;
|
|
(ci + n)->out = c->out;
|
|
(ci + n)->state = c->state;
|
|
(ci + n)->link_mode = get_link_mode(c);
|
|
if (++n >= req.conn_num)
|
|
break;
|
|
}
|
|
hci_dev_unlock(hdev);
|
|
|
|
cl->dev_id = hdev->id;
|
|
cl->conn_num = n;
|
|
size = sizeof(req) + n * sizeof(*ci);
|
|
|
|
hci_dev_put(hdev);
|
|
|
|
err = copy_to_user(arg, cl, size);
|
|
kfree(cl);
|
|
|
|
return err ? -EFAULT : 0;
|
|
}
|
|
|
|
int hci_get_conn_info(struct hci_dev *hdev, void __user *arg)
|
|
{
|
|
struct hci_conn_info_req req;
|
|
struct hci_conn_info ci;
|
|
struct hci_conn *conn;
|
|
char __user *ptr = arg + sizeof(req);
|
|
|
|
if (copy_from_user(&req, arg, sizeof(req)))
|
|
return -EFAULT;
|
|
|
|
hci_dev_lock(hdev);
|
|
conn = hci_conn_hash_lookup_ba(hdev, req.type, &req.bdaddr);
|
|
if (conn) {
|
|
bacpy(&ci.bdaddr, &conn->dst);
|
|
ci.handle = conn->handle;
|
|
ci.type = conn->type;
|
|
ci.out = conn->out;
|
|
ci.state = conn->state;
|
|
ci.link_mode = get_link_mode(conn);
|
|
}
|
|
hci_dev_unlock(hdev);
|
|
|
|
if (!conn)
|
|
return -ENOENT;
|
|
|
|
return copy_to_user(ptr, &ci, sizeof(ci)) ? -EFAULT : 0;
|
|
}
|
|
|
|
int hci_get_auth_info(struct hci_dev *hdev, void __user *arg)
|
|
{
|
|
struct hci_auth_info_req req;
|
|
struct hci_conn *conn;
|
|
|
|
if (copy_from_user(&req, arg, sizeof(req)))
|
|
return -EFAULT;
|
|
|
|
hci_dev_lock(hdev);
|
|
conn = hci_conn_hash_lookup_ba(hdev, ACL_LINK, &req.bdaddr);
|
|
if (conn)
|
|
req.type = conn->auth_type;
|
|
hci_dev_unlock(hdev);
|
|
|
|
if (!conn)
|
|
return -ENOENT;
|
|
|
|
return copy_to_user(arg, &req, sizeof(req)) ? -EFAULT : 0;
|
|
}
|
|
|
|
struct hci_chan *hci_chan_create(struct hci_conn *conn)
|
|
{
|
|
struct hci_dev *hdev = conn->hdev;
|
|
struct hci_chan *chan;
|
|
|
|
BT_DBG("%s hcon %p", hdev->name, conn);
|
|
|
|
if (test_bit(HCI_CONN_DROP, &conn->flags)) {
|
|
BT_DBG("Refusing to create new hci_chan");
|
|
return NULL;
|
|
}
|
|
|
|
chan = kzalloc(sizeof(*chan), GFP_KERNEL);
|
|
if (!chan)
|
|
return NULL;
|
|
|
|
chan->conn = hci_conn_get(conn);
|
|
skb_queue_head_init(&chan->data_q);
|
|
chan->state = BT_CONNECTED;
|
|
|
|
list_add_rcu(&chan->list, &conn->chan_list);
|
|
|
|
return chan;
|
|
}
|
|
|
|
void hci_chan_del(struct hci_chan *chan)
|
|
{
|
|
struct hci_conn *conn = chan->conn;
|
|
struct hci_dev *hdev = conn->hdev;
|
|
|
|
BT_DBG("%s hcon %p chan %p", hdev->name, conn, chan);
|
|
|
|
list_del_rcu(&chan->list);
|
|
|
|
synchronize_rcu();
|
|
|
|
/* Prevent new hci_chan's to be created for this hci_conn */
|
|
set_bit(HCI_CONN_DROP, &conn->flags);
|
|
|
|
hci_conn_put(conn);
|
|
|
|
skb_queue_purge(&chan->data_q);
|
|
kfree(chan);
|
|
}
|
|
|
|
void hci_chan_list_flush(struct hci_conn *conn)
|
|
{
|
|
struct hci_chan *chan, *n;
|
|
|
|
BT_DBG("hcon %p", conn);
|
|
|
|
list_for_each_entry_safe(chan, n, &conn->chan_list, list)
|
|
hci_chan_del(chan);
|
|
}
|
|
|
|
static struct hci_chan *__hci_chan_lookup_handle(struct hci_conn *hcon,
|
|
__u16 handle)
|
|
{
|
|
struct hci_chan *hchan;
|
|
|
|
list_for_each_entry(hchan, &hcon->chan_list, list) {
|
|
if (hchan->handle == handle)
|
|
return hchan;
|
|
}
|
|
|
|
return NULL;
|
|
}
|
|
|
|
struct hci_chan *hci_chan_lookup_handle(struct hci_dev *hdev, __u16 handle)
|
|
{
|
|
struct hci_conn_hash *h = &hdev->conn_hash;
|
|
struct hci_conn *hcon;
|
|
struct hci_chan *hchan = NULL;
|
|
|
|
rcu_read_lock();
|
|
|
|
list_for_each_entry_rcu(hcon, &h->list, list) {
|
|
hchan = __hci_chan_lookup_handle(hcon, handle);
|
|
if (hchan)
|
|
break;
|
|
}
|
|
|
|
rcu_read_unlock();
|
|
|
|
return hchan;
|
|
}
|
|
|
|
u32 hci_conn_get_phy(struct hci_conn *conn)
|
|
{
|
|
u32 phys = 0;
|
|
|
|
/* BLUETOOTH CORE SPECIFICATION Version 5.2 | Vol 2, Part B page 471:
|
|
* Table 6.2: Packets defined for synchronous, asynchronous, and
|
|
* CPB logical transport types.
|
|
*/
|
|
switch (conn->type) {
|
|
case SCO_LINK:
|
|
/* SCO logical transport (1 Mb/s):
|
|
* HV1, HV2, HV3 and DV.
|
|
*/
|
|
phys |= BT_PHY_BR_1M_1SLOT;
|
|
|
|
break;
|
|
|
|
case ACL_LINK:
|
|
/* ACL logical transport (1 Mb/s) ptt=0:
|
|
* DH1, DM3, DH3, DM5 and DH5.
|
|
*/
|
|
phys |= BT_PHY_BR_1M_1SLOT;
|
|
|
|
if (conn->pkt_type & (HCI_DM3 | HCI_DH3))
|
|
phys |= BT_PHY_BR_1M_3SLOT;
|
|
|
|
if (conn->pkt_type & (HCI_DM5 | HCI_DH5))
|
|
phys |= BT_PHY_BR_1M_5SLOT;
|
|
|
|
/* ACL logical transport (2 Mb/s) ptt=1:
|
|
* 2-DH1, 2-DH3 and 2-DH5.
|
|
*/
|
|
if (!(conn->pkt_type & HCI_2DH1))
|
|
phys |= BT_PHY_EDR_2M_1SLOT;
|
|
|
|
if (!(conn->pkt_type & HCI_2DH3))
|
|
phys |= BT_PHY_EDR_2M_3SLOT;
|
|
|
|
if (!(conn->pkt_type & HCI_2DH5))
|
|
phys |= BT_PHY_EDR_2M_5SLOT;
|
|
|
|
/* ACL logical transport (3 Mb/s) ptt=1:
|
|
* 3-DH1, 3-DH3 and 3-DH5.
|
|
*/
|
|
if (!(conn->pkt_type & HCI_3DH1))
|
|
phys |= BT_PHY_EDR_3M_1SLOT;
|
|
|
|
if (!(conn->pkt_type & HCI_3DH3))
|
|
phys |= BT_PHY_EDR_3M_3SLOT;
|
|
|
|
if (!(conn->pkt_type & HCI_3DH5))
|
|
phys |= BT_PHY_EDR_3M_5SLOT;
|
|
|
|
break;
|
|
|
|
case ESCO_LINK:
|
|
/* eSCO logical transport (1 Mb/s): EV3, EV4 and EV5 */
|
|
phys |= BT_PHY_BR_1M_1SLOT;
|
|
|
|
if (!(conn->pkt_type & (ESCO_EV4 | ESCO_EV5)))
|
|
phys |= BT_PHY_BR_1M_3SLOT;
|
|
|
|
/* eSCO logical transport (2 Mb/s): 2-EV3, 2-EV5 */
|
|
if (!(conn->pkt_type & ESCO_2EV3))
|
|
phys |= BT_PHY_EDR_2M_1SLOT;
|
|
|
|
if (!(conn->pkt_type & ESCO_2EV5))
|
|
phys |= BT_PHY_EDR_2M_3SLOT;
|
|
|
|
/* eSCO logical transport (3 Mb/s): 3-EV3, 3-EV5 */
|
|
if (!(conn->pkt_type & ESCO_3EV3))
|
|
phys |= BT_PHY_EDR_3M_1SLOT;
|
|
|
|
if (!(conn->pkt_type & ESCO_3EV5))
|
|
phys |= BT_PHY_EDR_3M_3SLOT;
|
|
|
|
break;
|
|
|
|
case LE_LINK:
|
|
if (conn->le_tx_phy & HCI_LE_SET_PHY_1M)
|
|
phys |= BT_PHY_LE_1M_TX;
|
|
|
|
if (conn->le_rx_phy & HCI_LE_SET_PHY_1M)
|
|
phys |= BT_PHY_LE_1M_RX;
|
|
|
|
if (conn->le_tx_phy & HCI_LE_SET_PHY_2M)
|
|
phys |= BT_PHY_LE_2M_TX;
|
|
|
|
if (conn->le_rx_phy & HCI_LE_SET_PHY_2M)
|
|
phys |= BT_PHY_LE_2M_RX;
|
|
|
|
if (conn->le_tx_phy & HCI_LE_SET_PHY_CODED)
|
|
phys |= BT_PHY_LE_CODED_TX;
|
|
|
|
if (conn->le_rx_phy & HCI_LE_SET_PHY_CODED)
|
|
phys |= BT_PHY_LE_CODED_RX;
|
|
|
|
break;
|
|
}
|
|
|
|
return phys;
|
|
}
|
|
|
|
int hci_abort_conn(struct hci_conn *conn, u8 reason)
|
|
{
|
|
int r = 0;
|
|
|
|
switch (conn->state) {
|
|
case BT_CONNECTED:
|
|
case BT_CONFIG:
|
|
if (conn->type == AMP_LINK) {
|
|
struct hci_cp_disconn_phy_link cp;
|
|
|
|
cp.phy_handle = HCI_PHY_HANDLE(conn->handle);
|
|
cp.reason = reason;
|
|
r = hci_send_cmd(conn->hdev, HCI_OP_DISCONN_PHY_LINK,
|
|
sizeof(cp), &cp);
|
|
} else {
|
|
struct hci_cp_disconnect dc;
|
|
|
|
dc.handle = cpu_to_le16(conn->handle);
|
|
dc.reason = reason;
|
|
r = hci_send_cmd(conn->hdev, HCI_OP_DISCONNECT,
|
|
sizeof(dc), &dc);
|
|
}
|
|
|
|
conn->state = BT_DISCONN;
|
|
|
|
break;
|
|
case BT_CONNECT:
|
|
if (conn->type == LE_LINK) {
|
|
if (test_bit(HCI_CONN_SCANNING, &conn->flags))
|
|
break;
|
|
r = hci_send_cmd(conn->hdev,
|
|
HCI_OP_LE_CREATE_CONN_CANCEL, 0, NULL);
|
|
} else if (conn->type == ACL_LINK) {
|
|
if (conn->hdev->hci_ver < BLUETOOTH_VER_1_2)
|
|
break;
|
|
r = hci_send_cmd(conn->hdev,
|
|
HCI_OP_CREATE_CONN_CANCEL,
|
|
6, &conn->dst);
|
|
}
|
|
break;
|
|
case BT_CONNECT2:
|
|
if (conn->type == ACL_LINK) {
|
|
struct hci_cp_reject_conn_req rej;
|
|
|
|
bacpy(&rej.bdaddr, &conn->dst);
|
|
rej.reason = reason;
|
|
|
|
r = hci_send_cmd(conn->hdev,
|
|
HCI_OP_REJECT_CONN_REQ,
|
|
sizeof(rej), &rej);
|
|
} else if (conn->type == SCO_LINK || conn->type == ESCO_LINK) {
|
|
struct hci_cp_reject_sync_conn_req rej;
|
|
|
|
bacpy(&rej.bdaddr, &conn->dst);
|
|
|
|
/* SCO rejection has its own limited set of
|
|
* allowed error values (0x0D-0x0F) which isn't
|
|
* compatible with most values passed to this
|
|
* function. To be safe hard-code one of the
|
|
* values that's suitable for SCO.
|
|
*/
|
|
rej.reason = HCI_ERROR_REJ_LIMITED_RESOURCES;
|
|
|
|
r = hci_send_cmd(conn->hdev,
|
|
HCI_OP_REJECT_SYNC_CONN_REQ,
|
|
sizeof(rej), &rej);
|
|
}
|
|
break;
|
|
default:
|
|
conn->state = BT_CLOSED;
|
|
break;
|
|
}
|
|
|
|
return r;
|
|
}
|