![Jaikumar Ganesh](/assets/img/avatar_default.png)
Add BT_POWER socket option used to control the power characteristics of the underlying ACL link. When the remote end has put the link in sniff mode and the host stack wants to send data we need need to explicitly exit sniff mode to work well with certain devices (For example, A2DP on Plantronics Voyager 855). However, this causes problems with HID devices. Hence, moving into active mode when sending data, irrespective of who set the sniff mode has been made as a socket option. By default, we will move into active mode. HID devices can set the L2CAP socket option to prevent this from happening. Currently, this has been implemented for L2CAP sockets. This has been tested with incoming and outgoing L2CAP sockets for HID and A2DP. Based on discussions on linux-bluetooth and patches submitted by Andrei Emeltchenko. Signed-off-by: Jaikumar Ganesh <jaikumar@google.com> Signed-off-by: Gustavo F. Padovan <padovan@profusion.mobi>
908 lines
21 KiB
C
908 lines
21 KiB
C
/*
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BlueZ - Bluetooth protocol stack for Linux
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Copyright (c) 2000-2001, 2010, Code Aurora Forum. All rights reserved.
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Written 2000,2001 by Maxim Krasnyansky <maxk@qualcomm.com>
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License version 2 as
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published by the Free Software Foundation;
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THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
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OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT OF THIRD PARTY RIGHTS.
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IN NO EVENT SHALL THE COPYRIGHT HOLDER(S) AND AUTHOR(S) BE LIABLE FOR ANY
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CLAIM, OR ANY SPECIAL INDIRECT OR CONSEQUENTIAL DAMAGES, OR ANY DAMAGES
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WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
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ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
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OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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ALL LIABILITY, INCLUDING LIABILITY FOR INFRINGEMENT OF ANY PATENTS,
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COPYRIGHTS, TRADEMARKS OR OTHER RIGHTS, RELATING TO USE OF THIS
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SOFTWARE IS DISCLAIMED.
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*/
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/* Bluetooth HCI connection handling. */
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#include <linux/module.h>
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#include <linux/types.h>
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#include <linux/errno.h>
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#include <linux/kernel.h>
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#include <linux/slab.h>
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#include <linux/poll.h>
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#include <linux/fcntl.h>
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#include <linux/init.h>
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#include <linux/skbuff.h>
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#include <linux/interrupt.h>
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#include <linux/notifier.h>
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#include <net/sock.h>
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#include <asm/system.h>
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#include <linux/uaccess.h>
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#include <asm/unaligned.h>
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#include <net/bluetooth/bluetooth.h>
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#include <net/bluetooth/hci_core.h>
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static void hci_le_connect(struct hci_conn *conn)
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{
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struct hci_dev *hdev = conn->hdev;
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struct hci_cp_le_create_conn cp;
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conn->state = BT_CONNECT;
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conn->out = 1;
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conn->link_mode |= HCI_LM_MASTER;
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memset(&cp, 0, sizeof(cp));
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cp.scan_interval = cpu_to_le16(0x0004);
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cp.scan_window = cpu_to_le16(0x0004);
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bacpy(&cp.peer_addr, &conn->dst);
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cp.peer_addr_type = conn->dst_type;
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cp.conn_interval_min = cpu_to_le16(0x0008);
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cp.conn_interval_max = cpu_to_le16(0x0100);
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cp.supervision_timeout = cpu_to_le16(0x0064);
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cp.min_ce_len = cpu_to_le16(0x0001);
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cp.max_ce_len = cpu_to_le16(0x0001);
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hci_send_cmd(hdev, HCI_OP_LE_CREATE_CONN, sizeof(cp), &cp);
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}
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static void hci_le_connect_cancel(struct hci_conn *conn)
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{
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hci_send_cmd(conn->hdev, HCI_OP_LE_CREATE_CONN_CANCEL, 0, NULL);
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}
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void hci_acl_connect(struct hci_conn *conn)
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{
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struct hci_dev *hdev = conn->hdev;
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struct inquiry_entry *ie;
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struct hci_cp_create_conn cp;
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BT_DBG("%p", conn);
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conn->state = BT_CONNECT;
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conn->out = 1;
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conn->link_mode = HCI_LM_MASTER;
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conn->attempt++;
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conn->link_policy = hdev->link_policy;
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memset(&cp, 0, sizeof(cp));
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bacpy(&cp.bdaddr, &conn->dst);
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cp.pscan_rep_mode = 0x02;
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ie = hci_inquiry_cache_lookup(hdev, &conn->dst);
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if (ie) {
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if (inquiry_entry_age(ie) <= INQUIRY_ENTRY_AGE_MAX) {
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cp.pscan_rep_mode = ie->data.pscan_rep_mode;
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cp.pscan_mode = ie->data.pscan_mode;
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cp.clock_offset = ie->data.clock_offset |
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cpu_to_le16(0x8000);
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}
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memcpy(conn->dev_class, ie->data.dev_class, 3);
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conn->ssp_mode = ie->data.ssp_mode;
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}
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cp.pkt_type = cpu_to_le16(conn->pkt_type);
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if (lmp_rswitch_capable(hdev) && !(hdev->link_mode & HCI_LM_MASTER))
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cp.role_switch = 0x01;
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else
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cp.role_switch = 0x00;
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hci_send_cmd(hdev, HCI_OP_CREATE_CONN, sizeof(cp), &cp);
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}
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static void hci_acl_connect_cancel(struct hci_conn *conn)
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{
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struct hci_cp_create_conn_cancel cp;
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BT_DBG("%p", conn);
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if (conn->hdev->hci_ver < 2)
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return;
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bacpy(&cp.bdaddr, &conn->dst);
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hci_send_cmd(conn->hdev, HCI_OP_CREATE_CONN_CANCEL, sizeof(cp), &cp);
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}
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void hci_acl_disconn(struct hci_conn *conn, __u8 reason)
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{
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struct hci_cp_disconnect cp;
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BT_DBG("%p", conn);
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conn->state = BT_DISCONN;
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cp.handle = cpu_to_le16(conn->handle);
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cp.reason = reason;
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hci_send_cmd(conn->hdev, HCI_OP_DISCONNECT, sizeof(cp), &cp);
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}
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void hci_add_sco(struct hci_conn *conn, __u16 handle)
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{
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struct hci_dev *hdev = conn->hdev;
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struct hci_cp_add_sco cp;
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BT_DBG("%p", conn);
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conn->state = BT_CONNECT;
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conn->out = 1;
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conn->attempt++;
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cp.handle = cpu_to_le16(handle);
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cp.pkt_type = cpu_to_le16(conn->pkt_type);
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hci_send_cmd(hdev, HCI_OP_ADD_SCO, sizeof(cp), &cp);
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}
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void hci_setup_sync(struct hci_conn *conn, __u16 handle)
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{
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struct hci_dev *hdev = conn->hdev;
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struct hci_cp_setup_sync_conn cp;
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BT_DBG("%p", conn);
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conn->state = BT_CONNECT;
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conn->out = 1;
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conn->attempt++;
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cp.handle = cpu_to_le16(handle);
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cp.pkt_type = cpu_to_le16(conn->pkt_type);
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cp.tx_bandwidth = cpu_to_le32(0x00001f40);
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cp.rx_bandwidth = cpu_to_le32(0x00001f40);
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cp.max_latency = cpu_to_le16(0xffff);
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cp.voice_setting = cpu_to_le16(hdev->voice_setting);
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cp.retrans_effort = 0xff;
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hci_send_cmd(hdev, HCI_OP_SETUP_SYNC_CONN, sizeof(cp), &cp);
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}
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void hci_le_conn_update(struct hci_conn *conn, u16 min, u16 max,
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u16 latency, u16 to_multiplier)
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{
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struct hci_cp_le_conn_update cp;
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struct hci_dev *hdev = conn->hdev;
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memset(&cp, 0, sizeof(cp));
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cp.handle = cpu_to_le16(conn->handle);
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cp.conn_interval_min = cpu_to_le16(min);
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cp.conn_interval_max = cpu_to_le16(max);
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cp.conn_latency = cpu_to_le16(latency);
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cp.supervision_timeout = cpu_to_le16(to_multiplier);
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cp.min_ce_len = cpu_to_le16(0x0001);
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cp.max_ce_len = cpu_to_le16(0x0001);
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hci_send_cmd(hdev, HCI_OP_LE_CONN_UPDATE, sizeof(cp), &cp);
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}
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EXPORT_SYMBOL(hci_le_conn_update);
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/* Device _must_ be locked */
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void hci_sco_setup(struct hci_conn *conn, __u8 status)
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{
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struct hci_conn *sco = conn->link;
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BT_DBG("%p", conn);
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if (!sco)
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return;
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if (!status) {
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if (lmp_esco_capable(conn->hdev))
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hci_setup_sync(sco, conn->handle);
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else
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hci_add_sco(sco, conn->handle);
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} else {
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hci_proto_connect_cfm(sco, status);
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hci_conn_del(sco);
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}
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}
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static void hci_conn_timeout(unsigned long arg)
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{
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struct hci_conn *conn = (void *) arg;
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struct hci_dev *hdev = conn->hdev;
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__u8 reason;
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BT_DBG("conn %p state %d", conn, conn->state);
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if (atomic_read(&conn->refcnt))
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return;
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hci_dev_lock(hdev);
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switch (conn->state) {
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case BT_CONNECT:
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case BT_CONNECT2:
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if (conn->out) {
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if (conn->type == ACL_LINK)
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hci_acl_connect_cancel(conn);
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else if (conn->type == LE_LINK)
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hci_le_connect_cancel(conn);
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}
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break;
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case BT_CONFIG:
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case BT_CONNECTED:
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reason = hci_proto_disconn_ind(conn);
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hci_acl_disconn(conn, reason);
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break;
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default:
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conn->state = BT_CLOSED;
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break;
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}
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hci_dev_unlock(hdev);
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}
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static void hci_conn_idle(unsigned long arg)
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{
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struct hci_conn *conn = (void *) arg;
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BT_DBG("conn %p mode %d", conn, conn->mode);
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hci_conn_enter_sniff_mode(conn);
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}
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static void hci_conn_auto_accept(unsigned long arg)
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{
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struct hci_conn *conn = (void *) arg;
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struct hci_dev *hdev = conn->hdev;
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hci_dev_lock(hdev);
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hci_send_cmd(hdev, HCI_OP_USER_CONFIRM_REPLY, sizeof(conn->dst),
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&conn->dst);
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hci_dev_unlock(hdev);
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}
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struct hci_conn *hci_conn_add(struct hci_dev *hdev, int type, bdaddr_t *dst)
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{
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struct hci_conn *conn;
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BT_DBG("%s dst %s", hdev->name, batostr(dst));
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conn = kzalloc(sizeof(struct hci_conn), GFP_ATOMIC);
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if (!conn)
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return NULL;
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bacpy(&conn->dst, dst);
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conn->hdev = hdev;
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conn->type = type;
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conn->mode = HCI_CM_ACTIVE;
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conn->state = BT_OPEN;
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conn->auth_type = HCI_AT_GENERAL_BONDING;
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conn->io_capability = hdev->io_capability;
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conn->remote_auth = 0xff;
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conn->key_type = 0xff;
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conn->power_save = 1;
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conn->disc_timeout = HCI_DISCONN_TIMEOUT;
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switch (type) {
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case ACL_LINK:
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conn->pkt_type = hdev->pkt_type & ACL_PTYPE_MASK;
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break;
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case SCO_LINK:
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if (lmp_esco_capable(hdev))
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conn->pkt_type = (hdev->esco_type & SCO_ESCO_MASK) |
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(hdev->esco_type & EDR_ESCO_MASK);
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else
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conn->pkt_type = hdev->pkt_type & SCO_PTYPE_MASK;
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break;
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case ESCO_LINK:
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conn->pkt_type = hdev->esco_type & ~EDR_ESCO_MASK;
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break;
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}
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skb_queue_head_init(&conn->data_q);
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setup_timer(&conn->disc_timer, hci_conn_timeout, (unsigned long)conn);
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setup_timer(&conn->idle_timer, hci_conn_idle, (unsigned long)conn);
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setup_timer(&conn->auto_accept_timer, hci_conn_auto_accept,
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(unsigned long) conn);
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atomic_set(&conn->refcnt, 0);
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hci_dev_hold(hdev);
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tasklet_disable(&hdev->tx_task);
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hci_conn_hash_add(hdev, conn);
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if (hdev->notify)
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hdev->notify(hdev, HCI_NOTIFY_CONN_ADD);
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atomic_set(&conn->devref, 0);
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hci_conn_init_sysfs(conn);
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tasklet_enable(&hdev->tx_task);
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return conn;
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}
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int hci_conn_del(struct hci_conn *conn)
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{
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struct hci_dev *hdev = conn->hdev;
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BT_DBG("%s conn %p handle %d", hdev->name, conn, conn->handle);
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del_timer(&conn->idle_timer);
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del_timer(&conn->disc_timer);
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del_timer(&conn->auto_accept_timer);
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if (conn->type == ACL_LINK) {
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struct hci_conn *sco = conn->link;
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if (sco)
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sco->link = NULL;
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/* Unacked frames */
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hdev->acl_cnt += conn->sent;
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} else if (conn->type == LE_LINK) {
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if (hdev->le_pkts)
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hdev->le_cnt += conn->sent;
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else
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hdev->acl_cnt += conn->sent;
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} else {
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struct hci_conn *acl = conn->link;
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if (acl) {
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acl->link = NULL;
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hci_conn_put(acl);
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}
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}
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tasklet_disable(&hdev->tx_task);
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hci_conn_hash_del(hdev, conn);
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if (hdev->notify)
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hdev->notify(hdev, HCI_NOTIFY_CONN_DEL);
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tasklet_enable(&hdev->tx_task);
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skb_queue_purge(&conn->data_q);
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hci_conn_put_device(conn);
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hci_dev_put(hdev);
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return 0;
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}
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struct hci_dev *hci_get_route(bdaddr_t *dst, bdaddr_t *src)
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{
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int use_src = bacmp(src, BDADDR_ANY);
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struct hci_dev *hdev = NULL;
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struct list_head *p;
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BT_DBG("%s -> %s", batostr(src), batostr(dst));
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read_lock_bh(&hci_dev_list_lock);
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list_for_each(p, &hci_dev_list) {
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struct hci_dev *d = list_entry(p, struct hci_dev, list);
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if (!test_bit(HCI_UP, &d->flags) || test_bit(HCI_RAW, &d->flags))
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continue;
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/* Simple routing:
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* No source address - find interface with bdaddr != dst
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* Source address - find interface with bdaddr == src
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*/
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if (use_src) {
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if (!bacmp(&d->bdaddr, src)) {
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hdev = d; break;
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}
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} else {
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if (bacmp(&d->bdaddr, dst)) {
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hdev = d; break;
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}
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}
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}
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if (hdev)
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hdev = hci_dev_hold(hdev);
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read_unlock_bh(&hci_dev_list_lock);
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return hdev;
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}
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EXPORT_SYMBOL(hci_get_route);
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/* Create SCO, ACL or LE connection.
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* Device _must_ be locked */
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struct hci_conn *hci_connect(struct hci_dev *hdev, int type, bdaddr_t *dst, __u8 sec_level, __u8 auth_type)
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{
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struct hci_conn *acl;
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struct hci_conn *sco;
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struct hci_conn *le;
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BT_DBG("%s dst %s", hdev->name, batostr(dst));
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if (type == LE_LINK) {
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struct adv_entry *entry;
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le = hci_conn_hash_lookup_ba(hdev, LE_LINK, dst);
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if (le)
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return ERR_PTR(-EBUSY);
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entry = hci_find_adv_entry(hdev, dst);
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if (!entry)
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return ERR_PTR(-EHOSTUNREACH);
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le = hci_conn_add(hdev, LE_LINK, dst);
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if (!le)
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return ERR_PTR(-ENOMEM);
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le->dst_type = entry->bdaddr_type;
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hci_le_connect(le);
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hci_conn_hold(le);
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return le;
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}
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acl = hci_conn_hash_lookup_ba(hdev, ACL_LINK, dst);
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if (!acl) {
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acl = hci_conn_add(hdev, ACL_LINK, dst);
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if (!acl)
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return NULL;
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}
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hci_conn_hold(acl);
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if (acl->state == BT_OPEN || acl->state == BT_CLOSED) {
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acl->sec_level = BT_SECURITY_LOW;
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acl->pending_sec_level = sec_level;
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acl->auth_type = auth_type;
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hci_acl_connect(acl);
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}
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if (type == ACL_LINK)
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return acl;
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sco = hci_conn_hash_lookup_ba(hdev, type, dst);
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if (!sco) {
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sco = hci_conn_add(hdev, type, dst);
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if (!sco) {
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hci_conn_put(acl);
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return NULL;
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}
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}
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acl->link = sco;
|
|
sco->link = acl;
|
|
|
|
hci_conn_hold(sco);
|
|
|
|
if (acl->state == BT_CONNECTED &&
|
|
(sco->state == BT_OPEN || sco->state == BT_CLOSED)) {
|
|
acl->power_save = 1;
|
|
hci_conn_enter_active_mode(acl, BT_POWER_FORCE_ACTIVE_ON);
|
|
|
|
if (test_bit(HCI_CONN_MODE_CHANGE_PEND, &acl->pend)) {
|
|
/* defer SCO setup until mode change completed */
|
|
set_bit(HCI_CONN_SCO_SETUP_PEND, &acl->pend);
|
|
return sco;
|
|
}
|
|
|
|
hci_sco_setup(acl, 0x00);
|
|
}
|
|
|
|
return sco;
|
|
}
|
|
EXPORT_SYMBOL(hci_connect);
|
|
|
|
/* Check link security requirement */
|
|
int hci_conn_check_link_mode(struct hci_conn *conn)
|
|
{
|
|
BT_DBG("conn %p", conn);
|
|
|
|
if (conn->ssp_mode > 0 && conn->hdev->ssp_mode > 0 &&
|
|
!(conn->link_mode & HCI_LM_ENCRYPT))
|
|
return 0;
|
|
|
|
return 1;
|
|
}
|
|
EXPORT_SYMBOL(hci_conn_check_link_mode);
|
|
|
|
/* Authenticate remote device */
|
|
static int hci_conn_auth(struct hci_conn *conn, __u8 sec_level, __u8 auth_type)
|
|
{
|
|
BT_DBG("conn %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->pend)) {
|
|
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 (conn->key_type != 0xff)
|
|
set_bit(HCI_CONN_REAUTH_PEND, &conn->pend);
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
/* Encrypt the the link */
|
|
static void hci_conn_encrypt(struct hci_conn *conn)
|
|
{
|
|
BT_DBG("conn %p", conn);
|
|
|
|
if (!test_and_set_bit(HCI_CONN_ENCRYPT_PEND, &conn->pend)) {
|
|
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("conn %p", conn);
|
|
|
|
/* 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 &&
|
|
(!conn->ssp_mode || !conn->hdev->ssp_mode))
|
|
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_and_set_bit(HCI_CONN_ENCRYPT_PEND, &conn->pend))
|
|
return 0;
|
|
|
|
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("conn %p", conn);
|
|
|
|
if (sec_level != BT_SECURITY_HIGH)
|
|
return 1; /* Accept if non-secure is required */
|
|
|
|
if (conn->key_type == HCI_LK_AUTH_COMBINATION ||
|
|
(conn->key_type == HCI_LK_COMBINATION &&
|
|
conn->pin_length == 16))
|
|
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("conn %p", conn);
|
|
|
|
if (!test_and_set_bit(HCI_CONN_AUTH_PEND, &conn->pend)) {
|
|
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;
|
|
}
|
|
EXPORT_SYMBOL(hci_conn_change_link_key);
|
|
|
|
/* Switch role */
|
|
int hci_conn_switch_role(struct hci_conn *conn, __u8 role)
|
|
{
|
|
BT_DBG("conn %p", conn);
|
|
|
|
if (!role && conn->link_mode & HCI_LM_MASTER)
|
|
return 1;
|
|
|
|
if (!test_and_set_bit(HCI_CONN_RSWITCH_PEND, &conn->pend)) {
|
|
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("conn %p mode %d", conn, conn->mode);
|
|
|
|
if (test_bit(HCI_RAW, &hdev->flags))
|
|
return;
|
|
|
|
if (conn->mode != HCI_CM_SNIFF)
|
|
goto timer;
|
|
|
|
if (!conn->power_save && !force_active)
|
|
goto timer;
|
|
|
|
if (!test_and_set_bit(HCI_CONN_MODE_CHANGE_PEND, &conn->pend)) {
|
|
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));
|
|
}
|
|
|
|
/* Enter sniff mode */
|
|
void hci_conn_enter_sniff_mode(struct hci_conn *conn)
|
|
{
|
|
struct hci_dev *hdev = conn->hdev;
|
|
|
|
BT_DBG("conn %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 = 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->pend)) {
|
|
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);
|
|
}
|
|
}
|
|
|
|
/* Drop all connection on the device */
|
|
void hci_conn_hash_flush(struct hci_dev *hdev)
|
|
{
|
|
struct hci_conn_hash *h = &hdev->conn_hash;
|
|
struct list_head *p;
|
|
|
|
BT_DBG("hdev %s", hdev->name);
|
|
|
|
p = h->list.next;
|
|
while (p != &h->list) {
|
|
struct hci_conn *c;
|
|
|
|
c = list_entry(p, struct hci_conn, list);
|
|
p = p->next;
|
|
|
|
c->state = BT_CLOSED;
|
|
|
|
hci_proto_disconn_cfm(c, 0x16);
|
|
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_connect(conn);
|
|
|
|
hci_dev_unlock(hdev);
|
|
}
|
|
|
|
void hci_conn_hold_device(struct hci_conn *conn)
|
|
{
|
|
atomic_inc(&conn->devref);
|
|
}
|
|
EXPORT_SYMBOL(hci_conn_hold_device);
|
|
|
|
void hci_conn_put_device(struct hci_conn *conn)
|
|
{
|
|
if (atomic_dec_and_test(&conn->devref))
|
|
hci_conn_del_sysfs(conn);
|
|
}
|
|
EXPORT_SYMBOL(hci_conn_put_device);
|
|
|
|
int hci_get_conn_list(void __user *arg)
|
|
{
|
|
struct hci_conn_list_req req, *cl;
|
|
struct hci_conn_info *ci;
|
|
struct hci_dev *hdev;
|
|
struct list_head *p;
|
|
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_bh(hdev);
|
|
list_for_each(p, &hdev->conn_hash.list) {
|
|
register struct hci_conn *c;
|
|
c = list_entry(p, struct hci_conn, 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_bh(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_bh(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_bh(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_bh(hdev);
|
|
conn = hci_conn_hash_lookup_ba(hdev, ACL_LINK, &req.bdaddr);
|
|
if (conn)
|
|
req.type = conn->auth_type;
|
|
hci_dev_unlock_bh(hdev);
|
|
|
|
if (!conn)
|
|
return -ENOENT;
|
|
|
|
return copy_to_user(arg, &req, sizeof(req)) ? -EFAULT : 0;
|
|
}
|