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- /*
- BlueZ - Bluetooth protocol stack for Linux
- Copyright (c) 2000-2001, 2010, Code Aurora Forum. All rights reserved.
- Written 2000,2001 by Maxim Krasnyansky <[email protected]>
- This program is free software; you can redistribute it and/or modify
- it under the terms of the GNU General Public License version 2 as
- published by the Free Software Foundation;
- THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
- OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
- FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT OF THIRD PARTY RIGHTS.
- IN NO EVENT SHALL THE COPYRIGHT HOLDER(S) AND AUTHOR(S) BE LIABLE FOR ANY
- CLAIM, OR ANY SPECIAL INDIRECT OR CONSEQUENTIAL DAMAGES, OR ANY DAMAGES
- WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
- ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
- OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
- ALL LIABILITY, INCLUDING LIABILITY FOR INFRINGEMENT OF ANY PATENTS,
- COPYRIGHTS, TRADEMARKS OR OTHER RIGHTS, RELATING TO USE OF THIS
- SOFTWARE IS DISCLAIMED.
- */
- /* Bluetooth HCI connection handling. */
- #include <linux/export.h>
- #include <linux/debugfs.h>
- #include <net/bluetooth/bluetooth.h>
- #include <net/bluetooth/hci_core.h>
- #include <net/bluetooth/l2cap.h>
- #include <net/bluetooth/iso.h>
- #include <net/bluetooth/mgmt.h>
- #include "hci_request.h"
- #include "smp.h"
- #include "a2mp.h"
- #include "eir.h"
- struct sco_param {
- u16 pkt_type;
- u16 max_latency;
- u8 retrans_effort;
- };
- struct conn_handle_t {
- struct hci_conn *conn;
- __u16 handle;
- };
- static const struct sco_param esco_param_cvsd[] = {
- { EDR_ESCO_MASK & ~ESCO_2EV3, 0x000a, 0x01 }, /* S3 */
- { EDR_ESCO_MASK & ~ESCO_2EV3, 0x0007, 0x01 }, /* S2 */
- { EDR_ESCO_MASK | ESCO_EV3, 0x0007, 0x01 }, /* S1 */
- { EDR_ESCO_MASK | ESCO_HV3, 0xffff, 0x01 }, /* D1 */
- { EDR_ESCO_MASK | ESCO_HV1, 0xffff, 0x01 }, /* D0 */
- };
- static const struct sco_param sco_param_cvsd[] = {
- { EDR_ESCO_MASK | ESCO_HV3, 0xffff, 0xff }, /* D1 */
- { EDR_ESCO_MASK | ESCO_HV1, 0xffff, 0xff }, /* D0 */
- };
- static const struct sco_param esco_param_msbc[] = {
- { EDR_ESCO_MASK & ~ESCO_2EV3, 0x000d, 0x02 }, /* T2 */
- { EDR_ESCO_MASK | ESCO_EV3, 0x0008, 0x02 }, /* T1 */
- };
- /* This function requires the caller holds hdev->lock */
- static void hci_connect_le_scan_cleanup(struct hci_conn *conn, u8 status)
- {
- struct hci_conn_params *params;
- struct hci_dev *hdev = conn->hdev;
- struct smp_irk *irk;
- bdaddr_t *bdaddr;
- u8 bdaddr_type;
- bdaddr = &conn->dst;
- bdaddr_type = conn->dst_type;
- /* Check if we need to convert to identity address */
- irk = hci_get_irk(hdev, bdaddr, bdaddr_type);
- if (irk) {
- bdaddr = &irk->bdaddr;
- bdaddr_type = irk->addr_type;
- }
- params = hci_pend_le_action_lookup(&hdev->pend_le_conns, bdaddr,
- bdaddr_type);
- if (!params)
- return;
- if (params->conn) {
- hci_conn_drop(params->conn);
- hci_conn_put(params->conn);
- params->conn = NULL;
- }
- if (!params->explicit_connect)
- return;
- /* 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 && status != HCI_ERROR_UNKNOWN_CONN_ID)
- mgmt_connect_failed(hdev, &conn->dst, conn->type,
- conn->dst_type, status);
- /* The connection attempt was doing scan for new RPA, and is
- * in scan phase. If params are not associated with any other
- * autoconnect action, remove them completely. If they are, just unmark
- * them as waiting for connection, by clearing explicit_connect field.
- */
- params->explicit_connect = false;
- hci_pend_le_list_del_init(params);
- switch (params->auto_connect) {
- case HCI_AUTO_CONN_EXPLICIT:
- hci_conn_params_del(hdev, bdaddr, bdaddr_type);
- /* return instead of break to avoid duplicate scan update */
- return;
- case HCI_AUTO_CONN_DIRECT:
- case HCI_AUTO_CONN_ALWAYS:
- hci_pend_le_list_add(params, &hdev->pend_le_conns);
- break;
- case HCI_AUTO_CONN_REPORT:
- hci_pend_le_list_add(params, &hdev->pend_le_reports);
- break;
- default:
- break;
- }
- hci_update_passive_scan(hdev);
- }
- static void hci_conn_cleanup(struct hci_conn *conn)
- {
- struct hci_dev *hdev = conn->hdev;
- if (test_bit(HCI_CONN_PARAM_REMOVAL_PEND, &conn->flags))
- hci_conn_params_del(conn->hdev, &conn->dst, conn->dst_type);
- if (test_and_clear_bit(HCI_CONN_FLUSH_KEY, &conn->flags))
- hci_remove_link_key(hdev, &conn->dst);
- hci_chan_list_flush(conn);
- hci_conn_hash_del(hdev, conn);
- if (conn->cleanup)
- conn->cleanup(conn);
- if (conn->type == SCO_LINK || conn->type == ESCO_LINK) {
- switch (conn->setting & SCO_AIRMODE_MASK) {
- case SCO_AIRMODE_CVSD:
- case SCO_AIRMODE_TRANSP:
- if (hdev->notify)
- hdev->notify(hdev, HCI_NOTIFY_DISABLE_SCO);
- break;
- }
- } else {
- if (hdev->notify)
- hdev->notify(hdev, HCI_NOTIFY_CONN_DEL);
- }
- debugfs_remove_recursive(conn->debugfs);
- hci_conn_del_sysfs(conn);
- hci_dev_put(hdev);
- }
- static void le_scan_cleanup(struct work_struct *work)
- {
- struct hci_conn *conn = container_of(work, struct hci_conn,
- le_scan_cleanup);
- struct hci_dev *hdev = conn->hdev;
- struct hci_conn *c = NULL;
- BT_DBG("%s hcon %p", hdev->name, conn);
- hci_dev_lock(hdev);
- /* Check that the hci_conn is still around */
- rcu_read_lock();
- list_for_each_entry_rcu(c, &hdev->conn_hash.list, list) {
- if (c == conn)
- break;
- }
- rcu_read_unlock();
- if (c == conn) {
- hci_connect_le_scan_cleanup(conn, 0x00);
- hci_conn_cleanup(conn);
- }
- hci_dev_unlock(hdev);
- hci_dev_put(hdev);
- hci_conn_put(conn);
- }
- static void hci_connect_le_scan_remove(struct hci_conn *conn)
- {
- BT_DBG("%s hcon %p", conn->hdev->name, conn);
- /* We can't call hci_conn_del/hci_conn_cleanup here since that
- * could deadlock with another hci_conn_del() call that's holding
- * hci_dev_lock and doing cancel_delayed_work_sync(&conn->disc_work).
- * Instead, grab temporary extra references to the hci_dev and
- * hci_conn and perform the necessary cleanup in a separate work
- * callback.
- */
- hci_dev_hold(conn->hdev);
- hci_conn_get(conn);
- /* Even though we hold a reference to the hdev, many other
- * things might get cleaned up meanwhile, including the hdev's
- * own workqueue, so we can't use that for scheduling.
- */
- schedule_work(&conn->le_scan_cleanup);
- }
- static void hci_acl_create_connection(struct hci_conn *conn)
- {
- struct hci_dev *hdev = conn->hdev;
- struct inquiry_entry *ie;
- struct hci_cp_create_conn cp;
- BT_DBG("hcon %p", conn);
- /* Many controllers disallow HCI Create Connection while it is doing
- * HCI Inquiry. So we cancel the Inquiry first before issuing HCI Create
- * Connection. This may cause the MGMT discovering state to become false
- * without user space's request but it is okay since the MGMT Discovery
- * APIs do not promise that discovery should be done forever. Instead,
- * the user space monitors the status of MGMT discovering and it may
- * request for discovery again when this flag becomes false.
- */
- if (test_bit(HCI_INQUIRY, &hdev->flags)) {
- /* Put this connection to "pending" state so that it will be
- * executed after the inquiry cancel command complete event.
- */
- conn->state = BT_CONNECT2;
- hci_send_cmd(hdev, HCI_OP_INQUIRY_CANCEL, 0, NULL);
- return;
- }
- conn->state = BT_CONNECT;
- conn->out = true;
- conn->role = HCI_ROLE_MASTER;
- conn->attempt++;
- conn->link_policy = hdev->link_policy;
- memset(&cp, 0, sizeof(cp));
- bacpy(&cp.bdaddr, &conn->dst);
- cp.pscan_rep_mode = 0x02;
- ie = hci_inquiry_cache_lookup(hdev, &conn->dst);
- if (ie) {
- if (inquiry_entry_age(ie) <= INQUIRY_ENTRY_AGE_MAX) {
- cp.pscan_rep_mode = ie->data.pscan_rep_mode;
- cp.pscan_mode = ie->data.pscan_mode;
- cp.clock_offset = ie->data.clock_offset |
- cpu_to_le16(0x8000);
- }
- memcpy(conn->dev_class, ie->data.dev_class, 3);
- }
- cp.pkt_type = cpu_to_le16(conn->pkt_type);
- if (lmp_rswitch_capable(hdev) && !(hdev->link_mode & HCI_LM_MASTER))
- cp.role_switch = 0x01;
- else
- cp.role_switch = 0x00;
- hci_send_cmd(hdev, HCI_OP_CREATE_CONN, sizeof(cp), &cp);
- }
- int hci_disconnect(struct hci_conn *conn, __u8 reason)
- {
- BT_DBG("hcon %p", conn);
- /* When we are central of an established connection and it enters
- * the disconnect timeout, then go ahead and try to read the
- * current clock offset. Processing of the result is done
- * within the event handling and hci_clock_offset_evt function.
- */
- if (conn->type == ACL_LINK && conn->role == HCI_ROLE_MASTER &&
- (conn->state == BT_CONNECTED || conn->state == BT_CONFIG)) {
- struct hci_dev *hdev = conn->hdev;
- struct hci_cp_read_clock_offset clkoff_cp;
- clkoff_cp.handle = cpu_to_le16(conn->handle);
- hci_send_cmd(hdev, HCI_OP_READ_CLOCK_OFFSET, sizeof(clkoff_cp),
- &clkoff_cp);
- }
- return hci_abort_conn(conn, reason);
- }
- static void hci_add_sco(struct hci_conn *conn, __u16 handle)
- {
- struct hci_dev *hdev = conn->hdev;
- struct hci_cp_add_sco cp;
- BT_DBG("hcon %p", conn);
- conn->state = BT_CONNECT;
- conn->out = true;
- conn->attempt++;
- cp.handle = cpu_to_le16(handle);
- cp.pkt_type = cpu_to_le16(conn->pkt_type);
- hci_send_cmd(hdev, HCI_OP_ADD_SCO, sizeof(cp), &cp);
- }
- static bool find_next_esco_param(struct hci_conn *conn,
- const struct sco_param *esco_param, int size)
- {
- for (; conn->attempt <= size; conn->attempt++) {
- if (lmp_esco_2m_capable(conn->link) ||
- (esco_param[conn->attempt - 1].pkt_type & ESCO_2EV3))
- break;
- BT_DBG("hcon %p skipped attempt %d, eSCO 2M not supported",
- conn, conn->attempt);
- }
- return conn->attempt <= size;
- }
- static int configure_datapath_sync(struct hci_dev *hdev, struct bt_codec *codec)
- {
- int err;
- __u8 vnd_len, *vnd_data = NULL;
- struct hci_op_configure_data_path *cmd = NULL;
- err = hdev->get_codec_config_data(hdev, ESCO_LINK, codec, &vnd_len,
- &vnd_data);
- if (err < 0)
- goto error;
- cmd = kzalloc(sizeof(*cmd) + vnd_len, GFP_KERNEL);
- if (!cmd) {
- err = -ENOMEM;
- goto error;
- }
- err = hdev->get_data_path_id(hdev, &cmd->data_path_id);
- if (err < 0)
- goto error;
- cmd->vnd_len = vnd_len;
- memcpy(cmd->vnd_data, vnd_data, vnd_len);
- cmd->direction = 0x00;
- __hci_cmd_sync_status(hdev, HCI_CONFIGURE_DATA_PATH,
- sizeof(*cmd) + vnd_len, cmd, HCI_CMD_TIMEOUT);
- cmd->direction = 0x01;
- err = __hci_cmd_sync_status(hdev, HCI_CONFIGURE_DATA_PATH,
- sizeof(*cmd) + vnd_len, cmd,
- HCI_CMD_TIMEOUT);
- error:
- kfree(cmd);
- kfree(vnd_data);
- return err;
- }
- static int hci_enhanced_setup_sync(struct hci_dev *hdev, void *data)
- {
- struct conn_handle_t *conn_handle = data;
- struct hci_conn *conn = conn_handle->conn;
- __u16 handle = conn_handle->handle;
- struct hci_cp_enhanced_setup_sync_conn cp;
- const struct sco_param *param;
- kfree(conn_handle);
- bt_dev_dbg(hdev, "hcon %p", conn);
- /* for offload use case, codec needs to configured before opening SCO */
- if (conn->codec.data_path)
- configure_datapath_sync(hdev, &conn->codec);
- conn->state = BT_CONNECT;
- conn->out = true;
- conn->attempt++;
- memset(&cp, 0x00, sizeof(cp));
- cp.handle = cpu_to_le16(handle);
- cp.tx_bandwidth = cpu_to_le32(0x00001f40);
- cp.rx_bandwidth = cpu_to_le32(0x00001f40);
- switch (conn->codec.id) {
- case BT_CODEC_MSBC:
- if (!find_next_esco_param(conn, esco_param_msbc,
- ARRAY_SIZE(esco_param_msbc)))
- return -EINVAL;
- param = &esco_param_msbc[conn->attempt - 1];
- cp.tx_coding_format.id = 0x05;
- cp.rx_coding_format.id = 0x05;
- cp.tx_codec_frame_size = __cpu_to_le16(60);
- cp.rx_codec_frame_size = __cpu_to_le16(60);
- cp.in_bandwidth = __cpu_to_le32(32000);
- cp.out_bandwidth = __cpu_to_le32(32000);
- cp.in_coding_format.id = 0x04;
- cp.out_coding_format.id = 0x04;
- 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 = 1;
- cp.out_transport_unit_size = 1;
- break;
- case BT_CODEC_TRANSPARENT:
- if (!find_next_esco_param(conn, esco_param_msbc,
- ARRAY_SIZE(esco_param_msbc)))
- return false;
- param = &esco_param_msbc[conn->attempt - 1];
- cp.tx_coding_format.id = 0x03;
- cp.rx_coding_format.id = 0x03;
- cp.tx_codec_frame_size = __cpu_to_le16(60);
- cp.rx_codec_frame_size = __cpu_to_le16(60);
- cp.in_bandwidth = __cpu_to_le32(0x1f40);
- cp.out_bandwidth = __cpu_to_le32(0x1f40);
- cp.in_coding_format.id = 0x03;
- cp.out_coding_format.id = 0x03;
- 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 = 1;
- cp.out_transport_unit_size = 1;
- break;
- case BT_CODEC_CVSD:
- if (lmp_esco_capable(conn->link)) {
- if (!find_next_esco_param(conn, esco_param_cvsd,
- ARRAY_SIZE(esco_param_cvsd)))
- return -EINVAL;
- param = &esco_param_cvsd[conn->attempt - 1];
- } else {
- if (conn->attempt > ARRAY_SIZE(sco_param_cvsd))
- 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_cig_params {
- struct hci_cp_le_set_cig_params cp;
- struct hci_cis_params cis[0x1f];
- };
- struct iso_list_data {
- union {
- u8 cig;
- u8 big;
- };
- union {
- u8 cis;
- u8 bis;
- u16 sync_handle;
- };
- int count;
- struct iso_cig_params 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 = kmalloc(sizeof(*d), GFP_KERNEL);
- if (!d)
- return -ENOMEM;
- memset(d, 0, sizeof(*d));
- 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 = kmalloc(sizeof(*d), GFP_KERNEL);
- if (!d)
- return -ENOMEM;
- memset(d, 0, sizeof(*d));
- 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_BOUND, &d);
- hci_conn_hash_list_state(hdev, find_cis, ISO_LINK, BT_CONNECT, &d);
- 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;
- }
- static bool hci_conn_unlink(struct hci_conn *conn)
- {
- if (!conn->link)
- return false;
- conn->link->link = NULL;
- conn->link = NULL;
- return true;
- }
- 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 *link = conn->link;
- if (link) {
- hci_conn_unlink(conn);
- /* 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 (link->handle == HCI_CONN_HANDLE_UNSET)
- hci_conn_del(link);
- }
- /* 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) {
- hci_conn_unlink(conn);
- 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;
- hci_connect_le_scan_cleanup(conn, status);
- /* 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;
- bt_dev_dbg(hdev, "err %d", err);
- hci_dev_lock(hdev);
- if (!err) {
- hci_connect_le_scan_cleanup(conn, 0x00);
- goto done;
- }
- /* Check if connection is still pending */
- if (conn != hci_lookup_le_connect(hdev))
- goto done;
- 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) {
- hci_pend_le_list_del_init(params);
- hci_pend_le_list_add(params, &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);
- }
- /* Reject outgoing connection to device with same BD ADDR against
- * CVE-2020-26555
- */
- if (!bacmp(&hdev->bdaddr, dst)) {
- bt_dev_dbg(hdev, "Reject connection with same BD_ADDR %pMR\n",
- dst);
- return ERR_PTR(-ECONNREFUSED);
- }
- 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 void set_cig_params_complete(struct hci_dev *hdev, void *data, int err)
- {
- struct iso_cig_params *pdu = data;
- bt_dev_dbg(hdev, "");
- if (err)
- bt_dev_err(hdev, "Unable to set CIG parameters: %d", err);
- kfree(pdu);
- }
- static int set_cig_params_sync(struct hci_dev *hdev, void *data)
- {
- struct iso_cig_params *pdu = data;
- u32 plen;
- plen = sizeof(pdu->cp) + pdu->cp.num_cis * sizeof(pdu->cis[0]);
- return __hci_cmd_sync_status(hdev, HCI_OP_LE_SET_CIG_PARAMS, plen, pdu,
- HCI_CMD_TIMEOUT);
- }
- 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;
- struct iso_cig_params *pdu;
- 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;
- pdu = kzalloc(sizeof(*pdu), GFP_KERNEL);
- if (!pdu)
- return false;
- memcpy(pdu, &data.pdu, sizeof(*pdu));
- if (hci_cmd_sync_queue(hdev, set_cig_params_sync, pdu,
- set_cig_params_complete) < 0) {
- kfree(pdu);
- 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 = kmalloc(sizeof(*cp), GFP_KERNEL);
- if (!cp) {
- hci_dev_clear_flag(hdev, HCI_PA_SYNC);
- return -ENOMEM;
- }
- /* Convert from ISO socket address type to HCI address type */
- if (dst_type == BDADDR_LE_PUBLIC)
- dst_type = ADDR_LE_DEV_PUBLIC;
- else
- dst_type = ADDR_LE_DEV_RANDOM;
- memset(cp, 0, sizeof(*cp));
- 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;
- switch (conn->key_type) {
- case HCI_LK_AUTH_COMBINATION_P256:
- /* An authenticated FIPS approved combination key has
- * sufficient security for security level 4 or lower.
- */
- if (sec_level <= BT_SECURITY_FIPS)
- goto encrypt;
- break;
- case HCI_LK_AUTH_COMBINATION_P192:
- /* An authenticated combination key has sufficient security for
- * security level 3 or lower.
- */
- if (sec_level <= BT_SECURITY_HIGH)
- goto encrypt;
- break;
- case HCI_LK_UNAUTH_COMBINATION_P192:
- case HCI_LK_UNAUTH_COMBINATION_P256:
- /* An unauthenticated combination key has sufficient security
- * for security level 2 or lower.
- */
- if (sec_level <= BT_SECURITY_MEDIUM)
- goto encrypt;
- break;
- case HCI_LK_COMBINATION:
- /* A combination key has always sufficient security for the
- * security levels 2 or lower. High security level requires the
- * combination key is generated using maximum PIN code length
- * (16). For pre 2.1 units.
- */
- if (sec_level <= BT_SECURITY_MEDIUM || conn->pin_length == 16)
- goto encrypt;
- break;
- default:
- break;
- }
- 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);
- /* Unlink before deleting otherwise it is possible that
- * hci_conn_del removes the link which may cause the list to
- * contain items already freed.
- */
- hci_conn_unlink(c);
- 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;
- if (test_and_set_bit(HCI_CONN_CANCEL, &conn->flags))
- return 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;
- }
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