Release 4.11 net/bluetooth/hci_conn.c

/*
   BlueZ - Bluetooth protocol stack for Linux
   Copyright (c) 2000-2001, 2010, Code Aurora Forum. All rights reserved.

   Written 2000,2001 by Maxim Krasnyansky <maxk@qualcomm.com>

   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 "hci_request.h"
#include "smp.h"
#include "a2mp.h"


struct sco_param {
	
u16 pkt_type;
	
u16 max_latency;
	
u8  retrans_effort;
};


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)
{
	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 || !params->explicit_connect)
		return;

	/* 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;

	list_del_init(&params->action);

	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:
		list_add(&params->action, &hdev->pend_le_conns);
		break;
	case HCI_AUTO_CONN_REPORT:
		list_add(&params->action, &hdev->pend_le_reports);
		break;
	default:
		break;
	}

	hci_update_background_scan(hdev);
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Jakub Pawlowski
112
59.89%
2
40.00%
Johan Hedberg
75
40.11%
3
60.00%
Total
187
100.00%
5
100.00%



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);

	hci_chan_list_flush(conn);

	hci_conn_hash_del(hdev, conn);

	if (hdev->notify)
		hdev->notify(hdev, HCI_NOTIFY_CONN_DEL);

	hci_conn_del_sysfs(conn);

	debugfs_remove_recursive(conn->debugfs);

	hci_dev_put(hdev);

	hci_conn_put(conn);
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Johan Hedberg
97
100.00%
1
100.00%
Total
97
100.00%
1
100.00%



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);
		hci_conn_cleanup(conn);
	}

	hci_dev_unlock(hdev);
	hci_dev_put(hdev);
	hci_conn_put(conn);
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Johan Hedberg
115
100.00%
1
100.00%
Total
115
100.00%
1
100.00%



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);
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Johan Hedberg
27
58.70%
2
66.67%
Jakub Pawlowski
19
41.30%
1
33.33%
Total
46
100.00%
3
100.00%



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);

	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);
		if (ie->data.ssp_mode > 0)
			set_bit(HCI_CONN_SSP_ENABLED, &conn->flags);
	}

	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);
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Maksim Krasnyanskiy
133
52.57%
3
12.50%
Marcel Holtmann
51
20.16%
10
41.67%
Linus Torvalds
41
16.21%
1
4.17%
Johan Hedberg
18
7.11%
3
12.50%
Andrei Emeltchenko
5
1.98%
2
8.33%
Vinicius Costa Gomes
2
0.79%
2
8.33%
Hideaki Yoshifuji / 吉藤英明
1
0.40%
1
4.17%
Maxim Krasnyansky
1
0.40%
1
4.17%
Joe Perches
1
0.40%
1
4.17%
Total
253
100.00%
24
100.00%



int hci_disconnect(struct hci_conn *conn, __u8 reason)
{
	BT_DBG("hcon %p", conn);

	/* When we are master 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);
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Johan Hedberg
71
72.45%
3
37.50%
Linus Torvalds
12
12.24%
1
12.50%
Maksim Krasnyanskiy
9
9.18%
1
12.50%
Fabian Frederick
4
4.08%
1
12.50%
Andrei Emeltchenko
1
1.02%
1
12.50%
Andre Guedes
1
1.02%
1
12.50%
Total
98
100.00%
8
100.00%



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);
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Maksim Krasnyanskiy
46
53.49%
3
25.00%
Linus Torvalds
23
26.74%
1
8.33%
Marcel Holtmann
12
13.95%
4
33.33%
Hideaki Yoshifuji / 吉藤英明
2
2.33%
1
8.33%
Andrei Emeltchenko
1
1.16%
1
8.33%
Vinicius Costa Gomes
1
1.16%
1
8.33%
Johan Hedberg
1
1.16%
1
8.33%
Total
86
100.00%
12
100.00%



bool hci_setup_sync(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_DBG("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 (conn->attempt > 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 (conn->attempt > 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;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Frédéric Dalleau
113
42.97%
2
20.00%
Marcel Holtmann
95
36.12%
2
20.00%
Bernhard Thaler
41
15.59%
1
10.00%
Johan Hedberg
11
4.18%
3
30.00%
Joe Perches
2
0.76%
1
10.00%
Andrei Emeltchenko
1
0.38%
1
10.00%
Total
263
100.00%
10
100.00%



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;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Claudio Takahasi
119
59.80%
1
20.00%
Marcel Holtmann
67
33.67%
2
40.00%
Johan Hedberg
11
5.53%
1
20.00%
Joe Perches
2
1.01%
1
20.00%
Total
199
100.00%
5
100.00%



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);
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Vinicius Costa Gomes
96
89.72%
1
25.00%
Marcel Holtmann
6
5.61%
1
25.00%
Johan Hedberg
4
3.74%
1
25.00%
Andrei Emeltchenko
1
0.93%
1
25.00%
Total
107
100.00%
4
100.00%

/* 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);
	}
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Marcel Holtmann
77
90.59%
1
33.33%
Andrei Emeltchenko
7
8.24%
1
33.33%
Johan Hedberg
1
1.18%
1
33.33%
Total
85
100.00%
3
100.00%



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));
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Lukasz Rymanowski
21
18.92%
1
7.14%
Maksim Krasnyanskiy
21
18.92%
1
7.14%
Gustavo Fernando Padovan
15
13.51%
1
7.14%
Marcel Holtmann
12
10.81%
4
28.57%
Jakub Pawlowski
10
9.01%
1
7.14%
Johan Hedberg
9
8.11%
1
7.14%
Ville Tervo
7
6.31%
1
7.14%
Claudio Takahasi
6
5.41%
1
7.14%
Linus Torvalds
6
5.41%
1
7.14%
Andrei Emeltchenko
4
3.60%
2
14.29%
Total
111
100.00%
14
100.00%

/* 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);
	}
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Gustavo Fernando Padovan
210
88.61%
1
20.00%
Johan Hedberg
21
8.86%
2
40.00%
Joe Perches
5
2.11%
1
20.00%
Andrei Emeltchenko
1
0.42%
1
20.00%
Total
237
100.00%
5
100.00%



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);
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Johan Hedberg
49
100.00%
2
100.00%
Total
49
100.00%
2
100.00%



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) {
		u8 enable = 0x00;
		hci_send_cmd(hdev, HCI_OP_LE_SET_ADV_ENABLE, sizeof(enable),
			     &enable);
		hci_le_conn_failed(conn, HCI_ERROR_ADVERTISING_TIMEOUT);
		return;
	}

	hci_abort_conn(conn, HCI_ERROR_REMOTE_USER_TERM);
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Johan Hedberg
88
100.00%
4
100.00%
Total
88
100.00%
4
100.00%



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->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;

	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 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);
	if (hdev->notify)
		hdev->notify(hdev, HCI_NOTIFY_CONN_ADD);

	hci_conn_init_sysfs(conn);

	return conn;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Marcel Holtmann
142
36.04%
7
21.88%
Johan Hedberg
105
26.65%
12
37.50%
Maksim Krasnyanskiy
69
17.51%
2
6.25%
Linus Torvalds
38
9.64%
1
3.12%
Andrzej Kaczmarek
12
3.05%
2
6.25%
Andrei Emeltchenko
7
1.78%
2
6.25%
Waldemar Rymarkiewicz
6
1.52%
1
3.12%
Gustavo Fernando Padovan
6
1.52%
2
6.25%
Luiz Augusto von Dentz
4
1.02%
1
3.12%
Pavel Emelyanov
4
1.02%
1
3.12%
Andre Guedes
1
0.25%
1
3.12%
Total
394
100.00%
32
100.00%



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;

		/* 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);
		}
	}

	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;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Maksim Krasnyanskiy
57
28.93%
1
6.25%
Linus Torvalds
37
18.78%
1
6.25%
Ville Tervo
34
17.26%
1
6.25%
Marcel Holtmann
28
14.21%
2
12.50%
Johan Hedberg
21
10.66%
6
37.50%
Andrei Emeltchenko
14
7.11%
2
12.50%
Tomas Targownik
4
2.03%
1
6.25%
Gustavo Fernando Padovan
1
0.51%
1
6.25%
David Herrmann
1
0.51%
1
6.25%
Total
197
100.00%
16
100.00%



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 ==