cregit-Linux how code gets into the kernel

Release 4.11 net/bluetooth/hci_conn.c

Directory: net/bluetooth
/*
   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);
}


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Johan Hedberg7540.11%360.00%


Total187100.00%5100.00%






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);
}


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Total97100.00%1100.00%






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);
}


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Total115100.00%1100.00%






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);
}


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Johan Hedberg2758.70%266.67%


Jakub Pawlowski1941.30%133.33%


Total46100.00%3100.00%






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);
}


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Maksim Krasnyanskiy13352.57%312.50%


Marcel Holtmann5120.16%1041.67%


Linus Torvalds4116.21%14.17%


Johan Hedberg187.11%312.50%


Andrei Emeltchenko51.98%28.33%


Vinicius Costa Gomes20.79%28.33%


Hideaki Yoshifuji / 吉藤英明10.40%14.17%


Maxim Krasnyansky10.40%14.17%


Joe Perches10.40%14.17%


Total253100.00%24100.00%






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);
}


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Johan Hedberg7172.45%337.50%


Linus Torvalds1212.24%112.50%


Maksim Krasnyanskiy99.18%112.50%


Fabian Frederick44.08%112.50%


Andrei Emeltchenko11.02%112.50%


Andre Guedes11.02%112.50%


Total98100.00%8100.00%






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
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Maksim Krasnyanskiy4653.49%325.00%


Linus Torvalds2326.74%18.33%


Marcel Holtmann1213.95%433.33%


Hideaki Yoshifuji / 吉藤英明22.33%18.33%


Andrei Emeltchenko11.16%18.33%


Vinicius Costa Gomes11.16%18.33%


Johan Hedberg11.16%18.33%


Total86100.00%12100.00%






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;
}


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Frédéric Dalleau11342.97%220.00%


Marcel Holtmann9536.12%220.00%


Bernhard Thaler4115.59%110.00%


Johan Hedberg114.18%330.00%


Joe Perches20.76%110.00%


Andrei Emeltchenko10.38%110.00%


Total263100.00%10100.00%






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;
}


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Marcel Holtmann6733.67%240.00%


Johan Hedberg115.53%120.00%


Joe Perches21.01%120.00%


Total199100.00%5100.00%






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);
}


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Vinicius Costa Gomes9689.72%125.00%


Marcel Holtmann65.61%125.00%


Johan Hedberg43.74%125.00%


Andrei Emeltchenko10.93%125.00%


Total107100.00%4100.00%



/* 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);
	}
}


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Marcel Holtmann7790.59%133.33%


Andrei Emeltchenko78.24%133.33%


Johan Hedberg11.18%133.33%


Total85100.00%3100.00%






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));
}


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Lukasz Rymanowski2118.92%17.14%


Maksim Krasnyanskiy2118.92%17.14%


Gustavo Fernando Padovan1513.51%17.14%


Marcel Holtmann1210.81%428.57%


Jakub Pawlowski109.01%17.14%


Johan Hedberg98.11%17.14%


Ville Tervo76.31%17.14%


Claudio Takahasi65.41%17.14%


Linus Torvalds65.41%17.14%


Andrei Emeltchenko43.60%214.29%


Total111100.00%14100.00%



/* 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);
	}
}


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Gustavo Fernando Padovan21088.61%120.00%


Johan Hedberg218.86%240.00%


Joe Perches52.11%120.00%


Andrei Emeltchenko10.42%120.00%


Total237100.00%5100.00%






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);
}


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Total49100.00%2100.00%






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);
}


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Total88100.00%4100.00%






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
PersonTokensPropCommitsCommitProp
Marcel Holtmann14236.04%721.88%


Johan Hedberg10526.65%1237.50%


Maksim Krasnyanskiy6917.51%26.25%


Linus Torvalds389.64%13.12%


Andrzej Kaczmarek123.05%26.25%


Andrei Emeltchenko71.78%26.25%


Waldemar Rymarkiewicz61.52%13.12%


Gustavo Fernando Padovan61.52%26.25%


Luiz Augusto von Dentz41.02%13.12%


Pavel Emelyanov41.02%13.12%


Andre Guedes10.25%13.12%


Total394100.00%32100.00%






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
PersonTokensPropCommitsCommitProp
Maksim Krasnyanskiy5728.93%16.25%


Linus Torvalds3718.78%16.25%


Ville Tervo3417.26%16.25%


Marcel Holtmann2814.21%212.50%


Johan Hedberg2110.66%637.50%


Andrei Emeltchenko147.11%212.50%


Tomas Targownik42.03%16.25%


Gustavo Fernando Padovan10.51%16.25%


David Herrmann10.51%16.25%


Total197100.00%16100.00%






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 == 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;
}

Contributors
PersonTokensPropCommitsCommitProp
Maksim Krasnyanskiy9339.08%321.43%


Johan Hedberg8334.87%17.14%


Linus Torvalds3916.39%17.14%


Marcel Holtmann93.78%428.57%


Luiz Augusto von Dentz62.52%17.14%


Andrei Emeltchenko52.10%214.29%


Gustavo Fernando Padovan20.84%17.14%


Hideaki Yoshifuji / 吉藤英明10.42%17.14%


Total238100.00%14100.00%




EXPORT_SYMBOL(hci_get_route);

/* This function requires the caller holds hdev->lock */



void hci_le_conn_failed(struct hci_conn *conn, u8 status)
{
	struct hci_dev *hdev = conn->hdev;
	struct hci_conn_params *params;

	params = hci_pend_le_action_lookup(&hdev->pend_le_conns, &conn->dst,
					   conn->dst_type);
	if (params && params->conn) {
		hci_conn_drop(params->conn);
		hci_conn_put(params->conn);
		params->conn = NULL;
	}

	conn->state = BT_CLOSED;

	/* If the status indicates successful cancellation of
         * the attempt (i.e. Unkown Connection Id) there's no point of
         * notifying failure since we'll go back to keep trying to
         * connect. The only exception is explicit connect requests
         * where a timeout + cancel does indicate an actual failure.
         */
	if (status != HCI_ERROR_UNKNOWN_CONN_ID ||
	    (params && params->explicit_connect))
		mgmt_connect_failed(hdev, &conn->dst, conn->type,
				    conn->dst_type, status);

	hci_connect_cfm(conn, status);

	hci_conn_del(conn);

	/* Since we may have temporarily stopped the background scanning in
         * favor of connection establishment, we should restart it.
         */
	hci_update_background_scan(hdev);

	/* Re-enable advertising in case this was a failed connection
         * attempt as a peripheral.
         */
	hci_req_reenable_advertising(hdev);
}


Contributors
PersonTokensPropCommitsCommitProp
Johan Hedberg7653.90%666.67%


Andre Guedes6546.10%333.33%


Total141100.00%9100.00%






static void create_le_conn_complete(struct hci_dev *hdev, u8 status, u16 opcode)
{
	struct hci_conn *conn;

	hci_dev_lock(hdev);

	conn = hci_lookup_le_connect(hdev);

	if (!status) {
		hci_connect_le_scan_cleanup(conn);
		goto done;
	}

	BT_ERR("HCI request failed to create LE connection: status 0x%2.2x",
	       status);

	if (!conn)
		goto done;

	hci_le_conn_failed(conn, status);

done:
	hci_dev_unlock(hdev);
}


Contributors
PersonTokensPropCommitsCommitProp
Andre Guedes5266.67%240.00%


Jakub Pawlowski2329.49%240.00%


Marcel Holtmann33.85%120.00%


Total78100.00%5100.00%






static bool conn_use_rpa(struct hci_conn *conn)
{
	struct hci_dev *hdev = conn->hdev;

	return hci_dev_test_flag(hdev, HCI_PRIVACY);
}


Contributors
PersonTokensPropCommitsCommitProp
Johan Hedberg28100.00%1100.00%


Total28100.00%1100.00%






static void hci_req_add_le_create_conn(struct hci_request *req,
				       struct hci_conn *conn)
{
	struct hci_cp_le_create_conn cp;
	struct hci_dev *hdev = conn->hdev;
	u8 own_addr_type;

	/* Update random address, but set require_privacy to false so
         * that we never connect with an non-resolvable address.
         */
	if (hci_update_random_address(req, false, conn_use_rpa(conn),
				      &own_addr_type))
		return;

	memset(&cp, 0, sizeof(cp));

	/* Set window to be the same value as the interval to enable
         * continuous scanning.
         */
	cp.scan_interval = cpu_to_le16(hdev->le_scan_interval);
	cp.scan_window = cp.scan_interval;

	bacpy(&cp.peer_addr, &conn->dst);
	cp.peer_addr_type = conn->dst_type;
	cp.own_address_type = own_addr_type;
	cp.conn_interval_min = cpu_to_le16(conn->le_conn_min_interval);
	cp.conn_interval_max = cpu_to_le16(conn->le_conn_max_interval);
	cp.conn_latency = cpu_to_le16(conn->le_conn_latency);
	cp.supervision_timeout = cpu_to_le16(conn->le_supv_timeout);
	cp.min_ce_len = cpu_to_le16(0x0000);
	cp.max_ce_len = cpu_to_le16(0x0000);

	hci_req_add(req, HCI_OP_LE_CREATE_CONN, sizeof(cp), &cp);

	conn->state = BT_CONNECT;
	clear_bit(HCI_CONN_SCANNING, &conn->flags);
}


Contributors
PersonTokensPropCommitsCommitProp
Andre Guedes14872.55%111.11%


Johan Hedberg2813.73%444.44%


Marcel Holtmann157.35%222.22%


Jakub Pawlowski104.90%111.11%


Joe Perches31.47%111.11%


Total204100.00%9100.00%






static void hci_req_directed_advertising(struct hci_request *req,
					 struct hci_conn *conn)
{
	struct hci_dev *hdev = req->hdev;
	struct hci_cp_le_set_adv_param cp;
	u8 own_addr_type;
	u8 enable;

	/* Clear the HCI_LE_ADV bit temporarily so that the
         * hci_update_random_address knows that it's safe to go ahead
         * and write a new random address. The flag will be set back on
         * as soon as the SET_ADV_ENABLE HCI command completes.
         */
	hci_dev_clear_flag(hdev, HCI_LE_ADV);

	/* Set require_privacy to false so that the remote device has a
         * chance of identifying us.
         */
	if (hci_update_random_address(req, false, conn_use_rpa(conn),
				      &own_addr_type) < 0)
		return;

	memset(&cp, 0, sizeof(cp));
	cp.type = LE_ADV_DIRECT_IND;
	cp.own_address_type = own_addr_type;
	cp.direct_addr_type = conn->dst_type;
	bacpy(&cp.direct_addr, &conn->dst);
	cp.channel_map = hdev->le_adv_channel_map;

	hci_req_add(req, HCI_OP_LE_SET_ADV_PARAM, sizeof(cp), &cp);

	enable = 0x01;
	hci_req_add(req, HCI_OP_LE_SET_ADV_ENABLE, sizeof(enable), &enable);

	conn->state = BT_CONNECT;
}


Contributors
PersonTokensPropCommitsCommitProp
Johan Hedberg15598.10%375.00%


Marcel Holtmann31.90%125.00%


Total158100.00%4100.00%






struct hci_conn *hci_connect_le(struct hci_dev *hdev, bdaddr_t *dst,
				u8 dst_type, u8 sec_level, u16 conn_timeout,
				u8 role)
{
	struct hci_conn_params *params;
	struct hci_conn *conn;
	struct smp_irk *irk;
	struct hci_request req;
	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);
	}

	/* 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;

	hci_req_init(&req, hdev);

	/* Disable advertising if we're active. For master role
         * connections most controllers will refuse to connect if
         * advertising is enabled, and for slave role connections we
         * anyway have to disable it in order to start directed
         * advertising.
         */
	if (hci_dev_test_flag(hdev, HCI_LE_ADV)) {
		u8 enable = 0x00;
		hci_req_add(&req, HCI_OP_LE_SET_ADV_ENABLE, sizeof(enable),
			    &enable);
	}

	/* If requested to connect as slave use directed advertising */
	if (conn->role == HCI_ROLE_SLAVE) {
		/* If we're active scanning most controllers are unable
                 * to initiate advertising. Simply reject the attempt.
                 */
		if (hci_dev_test_flag(hdev, HCI_LE_SCAN) &&
		    hdev->le_scan_type == LE_SCAN_ACTIVE) {
			skb_queue_purge(&req.cmd_q);
			hci_conn_del(conn);
			return ERR_PTR(-EBUSY);
		}

		hci_req_directed_advertising(&req, conn);
		goto create_conn;
	}

	params = hci_conn_params_lookup(hdev, &conn->dst, conn->dst_type);
	if (params) {
		conn->le_conn_min_interval = params->conn_min_interval;
		conn->le_conn_max_interval = params->conn_max_interval;
		conn->le_conn_latency = params->conn_latency;
		conn->le_supv_timeout = params->supervision_timeout;
	} else {
		conn->le_conn_min_interval = hdev->le_conn_min_interval;
		conn->le_conn_max_interval = hdev->le_conn_max_interval;
		conn->le_conn_latency = hdev->le_conn_latency;
		conn->le_supv_timeout = hdev->le_supv_timeout;
	}

	/* If controller is scanning, we stop it since some controllers are
         * not able to scan and connect at the same time. Also set the
         * HCI_LE_SCAN_INTERRUPTED flag so that the command complete
         * handler for scan disabling knows to set the correct discovery
         * state.
         */
	if (hci_dev_test_flag(hdev, HCI_LE_SCAN)) {
		hci_req_add_le_scan_disable(&req);
		hci_dev_set_flag(hdev, HCI_LE_SCAN_INTERRUPTED);
	}

	hci_req_add_le_create_conn(&req, conn);

create_conn:
	err = hci_req_run(&req, create_le_conn_complete);
	if (err) {
		hci_conn_del(conn);
		return ERR_PTR(err);
	}

	return conn;
}


Contributors
PersonTokensPropCommitsCommitProp
Johan Hedberg18737.25%1233.33%


Andre Guedes14027.89%925.00%


Marcel Holtmann5210.36%719.44%


Ville Tervo367.17%25.56%


Jakub Pawlowski356.97%12.78%


Lukasz Rymanowski316.18%12.78%


Maksim Krasnyanskiy132.59%12.78%


Linus Torvalds40.80%12.78%


Vinicius Costa Gomes30.60%12.78%


Andrzej Kaczmarek10.20%12.78%


Total502100.00%36100.00%






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;
}


Contributors
PersonTokensPropCommitsCommitProp
Jakub Pawlowski5394.64%150.00%


Johan Hedberg35.36%150.00%


Total56100.00%2100.00%



/* This function requires the caller holds hdev->lock */



static int hci_explicit_conn_params_set(struct hci_dev *hdev,
					bdaddr_t *addr, u8 addr_type)
{
	struct hci_conn_params *params;

	if (is_connected(hdev, addr, addr_type))
		return -EISCONN;

	params = hci_conn_params_lookup(hdev, addr, addr_type);
	if (!params) {
		params = hci_conn_params_add(hdev, addr, addr_type);
		if (!params)
			return -ENOMEM;

		/* If we created new params, mark them to be deleted in
                 * hci_connect_le_scan_cleanup. It's different case than
                 * existing disabled params, those will stay after cleanup.
                 */
		params->auto_connect = HCI_AUTO_CONN_EXPLICIT;
	}

	/* We're trying to connect, so make sure params are at pend_le_conns */
	if (params->auto_connect == HCI_AUTO_CONN_DISABLED ||
	    params->auto_connect == HCI_AUTO_CONN_REPORT ||
	    params->auto_connect == HCI_AUTO_CONN_EXPLICIT) {
		list_del_init(&params->action);
		list_add(&params->action, &hdev->pend_le_conns);
	}

	params->explicit_connect = true;

	BT_DBG("addr %pMR (type %u) auto_connect %u", addr, addr_type,
	       params->auto_connect);

	return 0;
}


Contributors
PersonTokensPropCommitsCommitProp
Jakub Pawlowski14295.30%250.00%


Johan Hedberg74.70%250.00%


Total149100.00%4100.00%



/* 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)
{
	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)
		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;

	hci_update_background_scan(hdev);

done:
	hci_conn_hold(conn);
	return conn;
}


Contributors
PersonTokensPropCommitsCommitProp
Jakub Pawlowski19495.10%125.00%


Johan Hedberg104.90%375.00%


Total204100.00%4100.00%






struct hci_conn *hci_connect_acl(struct hci_dev *hdev, bdaddr_t *dst,
				 u8 sec_level, u8 auth_type)
{
	struct hci_conn *acl;

	if (!hci_dev_test_flag(hdev, HCI_BREDR_ENABLED)) {
		if (lmp_bredr_capable(hdev))
			return ERR_PTR(-ECONNREFUSED);

		return ERR_PTR(-EOPNOTSUPP);
	}

	acl = hci_conn_hash_lookup_ba(hdev, ACL_LINK, dst);
	if (!acl) {
		acl = hci_conn_add(hdev, ACL_LINK, dst, HCI_ROLE_MASTER);
		if (!acl)
			return ERR_PTR(-ENOMEM);
	}

	hci_conn_hold(acl);

	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;
}


Contributors
PersonTokensPropCommitsCommitProp
Maksim Krasnyanskiy4228.00%212.50%


Vinicius Costa Gomes3120.67%318.75%


Johan Hedberg2718.00%531.25%


Marcel Holtmann1711.33%318.75%


Lukasz Rymanowski1610.67%16.25%


Andrei Emeltchenko96.00%16.25%


Linus Torvalds85.33%16.25%


Total150100.00%16100.00%






struct hci_conn *hci_connect_sco(struct hci_dev *hdev, int type, bdaddr_t *dst,
				 __u16 setting)
{
	struct hci_conn *acl;
	struct hci_conn *sco;

	acl = hci_connect_acl(hdev, dst, BT_SECURITY_LOW, HCI_AT_NO_BONDING);
	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;

	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;
}


Contributors
PersonTokensPropCommitsCommitProp
Maksim Krasnyanskiy5928.50%210.53%


Vinicius Costa Gomes4320.77%315.79%


Marcel Holtmann3617.39%315.79%


Linus Torvalds2210.63%15.26%


Johan Hedberg167.73%421.05%


Frédéric Dalleau115.31%210.53%


Andrei Emeltchenko94.35%15.26%


Nick Pelly83.86%15.26%


Jaikumar Ganesh20.97%15.26%


David Herrmann10.48%15.26%


Total207100.00%19100.00%



/* 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;
	}

	if (hci_conn_ssp_enabled(conn) &&
	    !test_bit(HCI_CONN_ENCRYPT, &conn->flags))
		return 0;

	return 1;
}


Contributors
PersonTokensPropCommitsCommitProp
Marcel Holtmann7286.75%342.86%


Johan Hedberg1012.05%342.86%


Andrei Emeltchenko11.20%114.29%


Total83100.00%7100.00%



/* 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;
}


Contributors
PersonTokensPropCommitsCommitProp
Johan Hedberg5431.95%529.41%


Maksim Krasnyanskiy4426.04%317.65%


Marcel Holtmann2816.57%529.41%


Linus Torvalds2715.98%15.88%


Waldemar Rymarkiewicz148.28%15.88%


Hideaki Yoshifuji / 吉藤英明10.59%15.88%


Andrei Emeltchenko10.59%15.88%


Total169100.00%17100.00%



/* Encrypt the 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);
	}
}


Contributors
PersonTokensPropCommitsCommitProp
Waldemar Rymarkiewicz6997.18%133.33%


Johan Hedberg11.41%133.33%


Andrei Emeltchenko11.41%133.33%


Total71100.00%3100.00%



/* Enable security */



int hci_conn_security(struct hci_conn *conn, __u8 sec_level, __u8 auth_type,
		      bool initiator)
{
	BT_DBG("hcon %p", conn);

	if (conn->type == LE_LINK)
		return smp_conn_security(conn, sec_level);

	/* For sdp we don't need the link key. */
	if (sec_level == BT_SECURITY_SDP)
		return 1;

	/* For non 2.1 devices and low security level we don't need the link
           key. */
	if (sec_level == BT_SECURITY_LOW && !hci_conn_ssp_enabled(conn))
		return 1;

	/* For other security levels we need the link key. */
	if (!test_bit(HCI_CONN_AUTH, &conn->flags))
		goto auth;

	/* An authenticated FIPS approved combination key has sufficient
         * security for security level 4. */
	if (conn->key_type == HCI_LK_AUTH_COMBINATION_P256 &&
	    sec_level == BT_SECURITY_FIPS)
		goto encrypt;

	/* An authenticated combination key has sufficient security for
           security level 3. */
	if ((conn->key_type == HCI_LK_AUTH_COMBINATION_P192 ||
	     conn->key_type == HCI_LK_AUTH_COMBINATION_P256) &&
	    sec_level == BT_SECURITY_HIGH)
		goto encrypt;

	/* An unauthenticated combination key has sufficient security for
           security level 1 and 2. */
	if ((conn->key_type == HCI_LK_UNAUTH_COMBINATION_P192 ||
	     conn->key_type == HCI_LK_UNAUTH_COMBINATION_P256) &&
	    (sec_level == BT_SECURITY_MEDIUM || sec_level == BT_SECURITY_LOW))
		goto encrypt;

	/* A combination key has always sufficient security for the security
           levels 1 or 2. High security level requires the combination key
           is generated using maximum PIN code length (16).
           For pre 2.1 units. */
	if (conn->key_type == HCI_LK_COMBINATION &&
	    (sec_level == BT_SECURITY_MEDIUM || sec_level == BT_SECURITY_LOW ||
	     conn->pin_length == 16))
		goto encrypt;

auth:
	if (test_bit(HCI_CONN_ENCRYPT_PEND, &conn->flags))
		return 0;

	if (initiator)
		set_bit(HCI_CONN_AUTH_INITIATOR, &conn->flags);

	if (!hci_conn_auth(conn, sec_level, auth_type))
		return 0;

encrypt:
	if (test_bit(HCI_CONN_ENCRYPT, &conn->flags))
		return 1;

	hci_conn_encrypt(conn);
	return 0;
}

Contributors
PersonTokensPropCommitsCommitProp
Marcel Holtmann7931.10%735.00%


Waldemar Rymarkiewicz7328.74%15.00%


Maksim Krasnyanskiy3513.78%15.00%


Johan Hedberg3513.78%630.00%


Vinicius Costa Gomes166.30%15.00%


Linus Torvalds103.94%15.00%


Luiz Augusto von Dentz41.57%15.00%


Andrei Emeltchenko10.39%15.00%


Gustavo Fernando Padovan10.39%15.00%


Total254100.00%20100.00%




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;
}

Contributors
PersonTokensPropCommitsCommitProp
Waldemar Rymarkiewicz4275.00%250.00%


Marcel Holtmann1323.21%125.00%


Andrei Emeltchenko11.79%125.00%


Total56100.00%4100.00%




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;
}

Contributors
PersonTokensPropCommitsCommitProp
Marcel Holtmann8595.51%350.00%


Johan Hedberg33.37%233.33%


Andrei Emeltchenko11.12%116.67%


Total89100.00%6100.00%




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));
}


Contributors
PersonTokensPropCommitsCommitProp
Marcel Holtmann10979.56%225.00%


Johan Hedberg1410.22%337.50%


Jaikumar Ganesh128.76%112.50%


Andrei Emeltchenko10.73%112.50%


Hideaki Yoshifuji / 吉藤英明10.73%112.50%


Total137100.00%8100.00%



/* Drop all connection on the device */



void hci_conn_hash_flush(struct hci_dev *hdev)
{
	struct hci_conn_hash *h = &hdev->conn_hash;
	struct hci_conn *c, *n;

	BT_DBG("hdev %s", hdev->name);

	list_for_each_entry_safe(c, n, &h->list, list) {
		c->state = BT_CLOSED;

		hci_disconn_cfm(c, HCI_ERROR_LOCAL_HOST_TERM);
		hci_conn_del(c);
	}
}


Contributors
PersonTokensPropCommitsCommitProp
Maksim Krasnyanskiy4059.70%228.57%


Linus Torvalds1319.40%114.29%


Andrei Emeltchenko710.45%228.57%


Gustavo Fernando Padovan68.96%114.29%


Johan Hedberg11.49%114.29%


Total67100.00%7100.00%



/* 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);
}


Contributors
PersonTokensPropCommitsCommitProp
Marcel Holtmann5398.15%150.00%


Vinicius Costa Gomes11.85%150.00%


Total54100.00%2100.00%






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;
}


Contributors
PersonTokensPropCommitsCommitProp
Johan Hedberg95100.00%2100.00%


Total95100.00%2100.00%






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;
}


Contributors
PersonTokensPropCommitsCommitProp
Maksim Krasnyanskiy16752.35%112.50%


Marcel Holtmann6721.00%112.50%


Linus Torvalds5818.18%112.50%


Andrei Emeltchenko103.13%112.50%


Luiz Augusto von Dentz92.82%112.50%


Al Viro30.94%112.50%


Johan Hedberg30.94%112.50%


Gustavo Fernando Padovan20.63%112.50%


Total319100.00%8100.00%






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;
}


Contributors
PersonTokensPropCommitsCommitProp
Maksim Krasnyanskiy10258.96%228.57%


Linus Torvalds5732.95%114.29%


Marcel Holtmann52.89%114.29%


Al Viro42.31%114.29%


Johan Hedberg31.73%114.29%


Gustavo Fernando Padovan21.16%114.29%


Total173100.00%7100.00%






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;
}


Contributors
PersonTokensPropCommitsCommitProp
Marcel Holtmann10598.13%150.00%


Gustavo Fernando Padovan21.87%150.00%


Total107100.00%2100.00%






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;
}


Contributors
PersonTokensPropCommitsCommitProp
Luiz Augusto von Dentz7563.03%111.11%


Johan Hedberg2924.37%333.33%


Gustavo Fernando Padovan75.88%222.22%


Mat Martineau65.04%111.11%


Andre Guedes10.84%111.11%


Andrei Emeltchenko10.84%111.11%


Total119100.00%9100.00%






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);
}


Contributors
PersonTokensPropCommitsCommitProp
Luiz Augusto von Dentz5770.37%112.50%


Johan Hedberg1619.75%337.50%


Gustavo Fernando Padovan67.41%225.00%


Andrei Emeltchenko22.47%225.00%


Total81100.00%8100.00%






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);
}


Contributors
PersonTokensPropCommitsCommitProp
Luiz Augusto von Dentz3177.50%125.00%


Andrei Emeltchenko717.50%250.00%


Gustavo Fernando Padovan25.00%125.00%


Total40100.00%4100.00%






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;
}


Contributors
PersonTokensPropCommitsCommitProp
Andrei Emeltchenko45100.00%1100.00%


Total45100.00%1100.00%






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;
}

Contributors
PersonTokensPropCommitsCommitProp
Andrei Emeltchenko70100.00%1100.00%


Total70100.00%1100.00%




Overall Contributors
PersonTokensPropCommitsCommitProp
Johan Hedberg163623.50%7232.88%


Marcel Holtmann126818.21%5525.11%


Maksim Krasnyanskiy93213.39%52.28%


Jakub Pawlowski6018.63%62.74%


Andre Guedes4095.87%156.85%


Linus Torvalds4035.79%10.46%


Gustavo Fernando Padovan2643.79%94.11%


Frédéric Dalleau2193.15%31.37%


Andrei Emeltchenko2163.10%135.94%


Waldemar Rymarkiewicz2113.03%41.83%


Vinicius Costa Gomes1952.80%83.65%


Luiz Augusto von Dentz1862.67%31.37%


Claudio Takahasi1251.80%20.91%


Ville Tervo771.11%31.37%


Bernhard Thaler701.01%10.46%


Lukasz Rymanowski680.98%31.37%


Jaikumar Ganesh140.20%10.46%


Joe Perches130.19%10.46%


Andrzej Kaczmarek130.19%31.37%


Nick Pelly80.11%10.46%


Al Viro70.10%10.46%


Hideaki Yoshifuji / 吉藤英明60.09%20.91%


Mat Martineau60.09%10.46%


Pavel Emelyanov40.06%10.46%


Tomas Targownik40.06%10.46%


Fabian Frederick40.06%10.46%


David Herrmann20.03%10.46%


Ron Shaffer10.01%10.46%


Maxim Krasnyansky10.01%10.46%


Total6963100.00%219100.00%


Directory: net/bluetooth



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