1 files changed, 1025 insertions, 0 deletions

diff --git a/net/bluetooth/hci_conn.c b/net/bluetooth/hci_conn.c
new file mode 100644
index 0000000..6c7f363
--- /dev/null
+++ b/net/bluetooth/hci_conn.c
@@ -0,0 +1,1025 @@
+/*
+   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 <net/bluetooth/bluetooth.h>
+#include <net/bluetooth/hci_core.h>
+#include <net/bluetooth/a2mp.h>
+#include <net/bluetooth/smp.h>
+
+static void hci_le_create_connection(struct hci_conn *conn)
+{
+	struct hci_dev *hdev = conn->hdev;
+	struct hci_cp_le_create_conn cp;
+
+	conn->state = BT_CONNECT;
+	conn->out = true;
+	conn->link_mode |= HCI_LM_MASTER;
+	conn->sec_level = BT_SECURITY_LOW;
+
+	memset(&cp, 0, sizeof(cp));
+	cp.scan_interval = __constant_cpu_to_le16(0x0060);
+	cp.scan_window = __constant_cpu_to_le16(0x0030);
+	bacpy(&cp.peer_addr, &conn->dst);
+	cp.peer_addr_type = conn->dst_type;
+	cp.conn_interval_min = __constant_cpu_to_le16(0x0028);
+	cp.conn_interval_max = __constant_cpu_to_le16(0x0038);
+	cp.supervision_timeout = __constant_cpu_to_le16(0x002a);
+	cp.min_ce_len = __constant_cpu_to_le16(0x0000);
+	cp.max_ce_len = __constant_cpu_to_le16(0x0000);
+
+	hci_send_cmd(hdev, HCI_OP_LE_CREATE_CONN, sizeof(cp), &cp);
+}
+
+static void hci_le_create_connection_cancel(struct hci_conn *conn)
+{
+	hci_send_cmd(conn->hdev, HCI_OP_LE_CREATE_CONN_CANCEL, 0, NULL);
+}
+
+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->link_mode = HCI_LM_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 |
+					    __constant_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);
+}
+
+static void hci_acl_create_connection_cancel(struct hci_conn *conn)
+{
+	struct hci_cp_create_conn_cancel cp;
+
+	BT_DBG("hcon %p", conn);
+
+	if (conn->hdev->hci_ver < BLUETOOTH_VER_1_2)
+		return;
+
+	bacpy(&cp.bdaddr, &conn->dst);
+	hci_send_cmd(conn->hdev, HCI_OP_CREATE_CONN_CANCEL, sizeof(cp), &cp);
+}
+
+static void hci_reject_sco(struct hci_conn *conn)
+{
+	struct hci_cp_reject_sync_conn_req cp;
+
+	cp.reason = HCI_ERROR_REMOTE_USER_TERM;
+	bacpy(&cp.bdaddr, &conn->dst);
+
+	hci_send_cmd(conn->hdev, HCI_OP_REJECT_SYNC_CONN_REQ, sizeof(cp), &cp);
+}
+
+void hci_disconnect(struct hci_conn *conn, __u8 reason)
+{
+	struct hci_cp_disconnect cp;
+
+	BT_DBG("hcon %p", conn);
+
+	conn->state = BT_DISCONN;
+
+	cp.handle = cpu_to_le16(conn->handle);
+	cp.reason = reason;
+	hci_send_cmd(conn->hdev, HCI_OP_DISCONNECT, sizeof(cp), &cp);
+}
+
+static void hci_amp_disconn(struct hci_conn *conn, __u8 reason)
+{
+	struct hci_cp_disconn_phy_link cp;
+
+	BT_DBG("hcon %p", conn);
+
+	conn->state = BT_DISCONN;
+
+	cp.phy_handle = HCI_PHY_HANDLE(conn->handle);
+	cp.reason = reason;
+	hci_send_cmd(conn->hdev, HCI_OP_DISCONN_PHY_LINK,
+		     sizeof(cp), &cp);
+}
+
+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);
+}
+
+void hci_setup_sync(struct hci_conn *conn, __u16 handle)
+{
+	struct hci_dev *hdev = conn->hdev;
+	struct hci_cp_setup_sync_conn 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);
+
+	cp.tx_bandwidth   = __constant_cpu_to_le32(0x00001f40);
+	cp.rx_bandwidth   = __constant_cpu_to_le32(0x00001f40);
+	cp.max_latency    = __constant_cpu_to_le16(0xffff);
+	cp.voice_setting  = cpu_to_le16(hdev->voice_setting);
+	cp.retrans_effort = 0xff;
+
+	hci_send_cmd(hdev, HCI_OP_SETUP_SYNC_CONN, sizeof(cp), &cp);
+}
+
+void hci_le_conn_update(struct hci_conn *conn, u16 min, u16 max,
+			u16 latency, u16 to_multiplier)
+{
+	struct hci_cp_le_conn_update cp;
+	struct hci_dev *hdev = conn->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		= __constant_cpu_to_le16(0x0001);
+	cp.max_ce_len		= __constant_cpu_to_le16(0x0001);
+
+	hci_send_cmd(hdev, HCI_OP_LE_CONN_UPDATE, sizeof(cp), &cp);
+}
+
+void hci_le_start_enc(struct hci_conn *conn, __le16 ediv, __u8 rand[8],
+		      __u8 ltk[16])
+{
+	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);
+	memcpy(cp.ltk, ltk, sizeof(cp.ltk));
+	cp.ediv = ediv;
+	memcpy(cp.rand, rand, sizeof(cp.rand));
+
+	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_proto_connect_cfm(sco, status);
+		hci_conn_del(sco);
+	}
+}
+
+static void hci_conn_disconnect(struct hci_conn *conn)
+{
+	__u8 reason = hci_proto_disconn_ind(conn);
+
+	switch (conn->type) {
+	case AMP_LINK:
+		hci_amp_disconn(conn, reason);
+		break;
+	default:
+		hci_disconnect(conn, reason);
+		break;
+	}
+}
+
+static void hci_conn_timeout(struct work_struct *work)
+{
+	struct hci_conn *conn = container_of(work, struct hci_conn,
+					     disc_work.work);
+
+	BT_DBG("hcon %p state %s", conn, state_to_string(conn->state));
+
+	if (atomic_read(&conn->refcnt))
+		return;
+
+	switch (conn->state) {
+	case BT_CONNECT:
+	case BT_CONNECT2:
+		if (conn->out) {
+			if (conn->type == ACL_LINK)
+				hci_acl_create_connection_cancel(conn);
+			else if (conn->type == LE_LINK)
+				hci_le_create_connection_cancel(conn);
+		} else if (conn->type == SCO_LINK || conn->type == ESCO_LINK) {
+			hci_reject_sco(conn);
+		}
+		break;
+	case BT_CONFIG:
+	case BT_CONNECTED:
+		hci_conn_disconnect(conn);
+		break;
+	default:
+		conn->state = BT_CLOSED;
+		break;
+	}
+}
+
+/* Enter sniff mode */
+static void hci_conn_enter_sniff_mode(struct hci_conn *conn)
+{
+	struct hci_dev *hdev = conn->hdev;
+
+	BT_DBG("hcon %p mode %d", conn, conn->mode);
+
+	if (test_bit(HCI_RAW, &hdev->flags))
+		return;
+
+	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        = __constant_cpu_to_le16(0);
+		cp.min_remote_timeout = __constant_cpu_to_le16(0);
+		cp.min_local_timeout  = __constant_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      = __constant_cpu_to_le16(4);
+		cp.timeout      = __constant_cpu_to_le16(1);
+		hci_send_cmd(hdev, HCI_OP_SNIFF_MODE, sizeof(cp), &cp);
+	}
+}
+
+static void hci_conn_idle(unsigned long arg)
+{
+	struct hci_conn *conn = (void *) arg;
+
+	BT_DBG("hcon %p mode %d", conn, conn->mode);
+
+	hci_conn_enter_sniff_mode(conn);
+}
+
+static void hci_conn_auto_accept(unsigned long arg)
+{
+	struct hci_conn *conn = (void *) arg;
+	struct hci_dev *hdev = conn->hdev;
+
+	hci_send_cmd(hdev, HCI_OP_USER_CONFIRM_REPLY, sizeof(conn->dst),
+		     &conn->dst);
+}
+
+struct hci_conn *hci_conn_add(struct hci_dev *hdev, int type, bdaddr_t *dst)
+{
+	struct hci_conn *conn;
+
+	BT_DBG("%s dst %pMR", hdev->name, dst);
+
+	conn = kzalloc(sizeof(struct hci_conn), GFP_KERNEL);
+	if (!conn)
+		return NULL;
+
+	bacpy(&conn->dst, dst);
+	conn->hdev  = hdev;
+	conn->type  = type;
+	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;
+
+	set_bit(HCI_CONN_POWER_SAVE, &conn->flags);
+	conn->disc_timeout = HCI_DISCONN_TIMEOUT;
+
+	switch (type) {
+	case ACL_LINK:
+		conn->pkt_type = hdev->pkt_type & ACL_PTYPE_MASK;
+		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);
+	setup_timer(&conn->idle_timer, hci_conn_idle, (unsigned long)conn);
+	setup_timer(&conn->auto_accept_timer, hci_conn_auto_accept,
+		    (unsigned long) conn);
+
+	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;
+}
+
+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);
+
+	del_timer(&conn->idle_timer);
+
+	cancel_delayed_work_sync(&conn->disc_work);
+
+	del_timer(&conn->auto_accept_timer);
+
+	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) {
+		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);
+		}
+	}
+
+	hci_chan_list_flush(conn);
+
+	if (conn->amp_mgr)
+		amp_mgr_put(conn->amp_mgr);
+
+	hci_conn_hash_del(hdev, conn);
+	if (hdev->notify)
+		hdev->notify(hdev, HCI_NOTIFY_CONN_DEL);
+
+	skb_queue_purge(&conn->data_q);
+
+	hci_conn_del_sysfs(conn);
+
+	hci_dev_put(hdev);
+
+	hci_conn_put(conn);
+
+	return 0;
+}
+
+struct hci_dev *hci_get_route(bdaddr_t *dst, bdaddr_t *src)
+{
+	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) ||
+		    test_bit(HCI_RAW, &d->flags) ||
+		    d->dev_type != HCI_BREDR)
+			continue;
+
+		/* Simple routing:
+		 *   No source address - find interface with bdaddr != dst
+		 *   Source address    - find interface with bdaddr == src
+		 */
+
+		if (use_src) {
+			if (!bacmp(&d->bdaddr, src)) {
+				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);
+
+static struct hci_conn *hci_connect_le(struct hci_dev *hdev, bdaddr_t *dst,
+				    u8 dst_type, u8 sec_level, u8 auth_type)
+{
+	struct hci_conn *le;
+
+	if (test_bit(HCI_LE_PERIPHERAL, &hdev->flags))
+		return ERR_PTR(-ENOTSUPP);
+
+	le = hci_conn_hash_lookup_ba(hdev, LE_LINK, dst);
+	if (!le) {
+		le = hci_conn_hash_lookup_state(hdev, LE_LINK, BT_CONNECT);
+		if (le)
+			return ERR_PTR(-EBUSY);
+
+		le = hci_conn_add(hdev, LE_LINK, dst);
+		if (!le)
+			return ERR_PTR(-ENOMEM);
+
+		le->dst_type = bdaddr_to_le(dst_type);
+		hci_le_create_connection(le);
+	}
+
+	le->pending_sec_level = sec_level;
+	le->auth_type = auth_type;
+
+	hci_conn_hold(le);
+
+	return le;
+}
+
+static struct hci_conn *hci_connect_acl(struct hci_dev *hdev, bdaddr_t *dst,
+						u8 sec_level, u8 auth_type)
+{
+	struct hci_conn *acl;
+
+	acl = hci_conn_hash_lookup_ba(hdev, ACL_LINK, dst);
+	if (!acl) {
+		acl = hci_conn_add(hdev, ACL_LINK, dst);
+		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;
+}
+
+static struct hci_conn *hci_connect_sco(struct hci_dev *hdev, int type,
+				bdaddr_t *dst, u8 sec_level, u8 auth_type)
+{
+	struct hci_conn *acl;
+	struct hci_conn *sco;
+
+	acl = hci_connect_acl(hdev, dst, sec_level, auth_type);
+	if (IS_ERR(acl))
+		return acl;
+
+	sco = hci_conn_hash_lookup_ba(hdev, type, dst);
+	if (!sco) {
+		sco = hci_conn_add(hdev, type, dst);
+		if (!sco) {
+			hci_conn_drop(acl);
+			return ERR_PTR(-ENOMEM);
+		}
+	}
+
+	acl->link = sco;
+	sco->link = acl;
+
+	hci_conn_hold(sco);
+
+	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;
+}
+
+/* Create SCO, ACL or LE connection. */
+struct hci_conn *hci_connect(struct hci_dev *hdev, int type, bdaddr_t *dst,
+			     __u8 dst_type, __u8 sec_level, __u8 auth_type)
+{
+	BT_DBG("%s dst %pMR type 0x%x", hdev->name, dst, type);
+
+	switch (type) {
+	case LE_LINK:
+		return hci_connect_le(hdev, dst, dst_type, sec_level, auth_type);
+	case ACL_LINK:
+		return hci_connect_acl(hdev, dst, sec_level, auth_type);
+	case SCO_LINK:
+	case ESCO_LINK:
+		return hci_connect_sco(hdev, type, dst, sec_level, auth_type);
+	}
+
+	return ERR_PTR(-EINVAL);
+}
+
+/* Check link security requirement */
+int hci_conn_check_link_mode(struct hci_conn *conn)
+{
+	BT_DBG("hcon %p", conn);
+
+	if (hci_conn_ssp_enabled(conn) && !(conn->link_mode & HCI_LM_ENCRYPT))
+		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 (conn->link_mode & HCI_LM_AUTH)
+		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;
+
+		/* encrypt must be pending if auth is also pending */
+		set_bit(HCI_CONN_ENCRYPT_PEND, &conn->flags);
+
+		cp.handle = cpu_to_le16(conn->handle);
+		hci_send_cmd(conn->hdev, HCI_OP_AUTH_REQUESTED,
+			     sizeof(cp), &cp);
+		if (conn->key_type != 0xff)
+			set_bit(HCI_CONN_REAUTH_PEND, &conn->flags);
+	}
+
+	return 0;
+}
+
+/* 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);
+	}
+}
+
+/* Enable security */
+int hci_conn_security(struct hci_conn *conn, __u8 sec_level, __u8 auth_type)
+{
+	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 (!(conn->link_mode & HCI_LM_AUTH))
+		goto auth;
+
+	/* An authenticated combination key has sufficient security for any
+	   security level. */
+	if (conn->key_type == HCI_LK_AUTH_COMBINATION)
+		goto encrypt;
+
+	/* An unauthenticated combination key has sufficient security for
+	   security level 1 and 2. */
+	if (conn->key_type == HCI_LK_UNAUTH_COMBINATION &&
+	    (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_HIGH || conn->pin_length == 16))
+		goto encrypt;
+
+auth:
+	if (test_bit(HCI_CONN_ENCRYPT_PEND, &conn->flags))
+		return 0;
+
+	if (!hci_conn_auth(conn, sec_level, auth_type))
+		return 0;
+
+encrypt:
+	if (conn->link_mode & HCI_LM_ENCRYPT)
+		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);
+
+	if (sec_level != BT_SECURITY_HIGH)
+		return 1; /* Accept if non-secure is required */
+
+	if (conn->sec_level == BT_SECURITY_HIGH)
+		return 1;
+
+	return 0; /* Reject not secure link */
+}
+EXPORT_SYMBOL(hci_conn_check_secure);
+
+/* Change link key */
+int hci_conn_change_link_key(struct hci_conn *conn)
+{
+	BT_DBG("hcon %p", conn);
+
+	if (!test_and_set_bit(HCI_CONN_AUTH_PEND, &conn->flags)) {
+		struct hci_cp_change_conn_link_key cp;
+		cp.handle = cpu_to_le16(conn->handle);
+		hci_send_cmd(conn->hdev, HCI_OP_CHANGE_CONN_LINK_KEY,
+			     sizeof(cp), &cp);
+	}
+
+	return 0;
+}
+
+/* Switch role */
+int hci_conn_switch_role(struct hci_conn *conn, __u8 role)
+{
+	BT_DBG("hcon %p", conn);
+
+	if (!role && conn->link_mode & HCI_LM_MASTER)
+		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 (test_bit(HCI_RAW, &hdev->flags))
+		return;
+
+	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)
+		mod_timer(&conn->idle_timer,
+			  jiffies + 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_proto_disconn_cfm(c, HCI_ERROR_LOCAL_HOST_TERM);
+		hci_conn_del(c);
+	}
+}
+
+/* Check pending connect attempts */
+void hci_conn_check_pending(struct hci_dev *hdev)
+{
+	struct hci_conn *conn;
+
+	BT_DBG("hdev %s", hdev->name);
+
+	hci_dev_lock(hdev);
+
+	conn = hci_conn_hash_lookup_state(hdev, ACL_LINK, BT_CONNECT2);
+	if (conn)
+		hci_acl_create_connection(conn);
+
+	hci_dev_unlock(hdev);
+}
+
+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 = c->link_mode;
+		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 = conn->link_mode;
+	}
+	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);
+
+	chan = kzalloc(sizeof(struct hci_chan), GFP_KERNEL);
+	if (!chan)
+		return NULL;
+
+	chan->conn = 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();
+
+	hci_conn_drop(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;
+}