417 lines
9.8 KiB
C
417 lines
9.8 KiB
C
/*
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BlueZ - Bluetooth protocol stack for Linux
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Copyright (C) 2000-2001 Qualcomm Incorporated
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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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#ifndef __BLUETOOTH_H
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#define __BLUETOOTH_H
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#include <linux/poll.h>
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#include <net/sock.h>
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#include <linux/seq_file.h>
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#define BT_SUBSYS_VERSION 2
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#define BT_SUBSYS_REVISION 22
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#ifndef AF_BLUETOOTH
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#define AF_BLUETOOTH 31
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#define PF_BLUETOOTH AF_BLUETOOTH
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#endif
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/* Bluetooth versions */
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#define BLUETOOTH_VER_1_1 1
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#define BLUETOOTH_VER_1_2 2
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#define BLUETOOTH_VER_2_0 3
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/* Reserv for core and drivers use */
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#define BT_SKB_RESERVE 8
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#define BTPROTO_L2CAP 0
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#define BTPROTO_HCI 1
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#define BTPROTO_SCO 2
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#define BTPROTO_RFCOMM 3
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#define BTPROTO_BNEP 4
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#define BTPROTO_CMTP 5
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#define BTPROTO_HIDP 6
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#define BTPROTO_AVDTP 7
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#define SOL_HCI 0
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#define SOL_L2CAP 6
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#define SOL_SCO 17
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#define SOL_RFCOMM 18
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#define BT_SECURITY 4
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struct bt_security {
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__u8 level;
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__u8 key_size;
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};
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#define BT_SECURITY_SDP 0
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#define BT_SECURITY_LOW 1
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#define BT_SECURITY_MEDIUM 2
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#define BT_SECURITY_HIGH 3
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#define BT_SECURITY_FIPS 4
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#define BT_DEFER_SETUP 7
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#define BT_FLUSHABLE 8
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#define BT_FLUSHABLE_OFF 0
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#define BT_FLUSHABLE_ON 1
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#define BT_POWER 9
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struct bt_power {
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__u8 force_active;
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};
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#define BT_POWER_FORCE_ACTIVE_OFF 0
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#define BT_POWER_FORCE_ACTIVE_ON 1
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#define BT_CHANNEL_POLICY 10
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/* BR/EDR only (default policy)
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* AMP controllers cannot be used.
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* Channel move requests from the remote device are denied.
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* If the L2CAP channel is currently using AMP, move the channel to BR/EDR.
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*/
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#define BT_CHANNEL_POLICY_BREDR_ONLY 0
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/* BR/EDR Preferred
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* Allow use of AMP controllers.
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* If the L2CAP channel is currently on AMP, move it to BR/EDR.
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* Channel move requests from the remote device are allowed.
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*/
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#define BT_CHANNEL_POLICY_BREDR_PREFERRED 1
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/* AMP Preferred
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* Allow use of AMP controllers
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* If the L2CAP channel is currently on BR/EDR and AMP controller
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* resources are available, initiate a channel move to AMP.
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* Channel move requests from the remote device are allowed.
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* If the L2CAP socket has not been connected yet, try to create
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* and configure the channel directly on an AMP controller rather
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* than BR/EDR.
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*/
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#define BT_CHANNEL_POLICY_AMP_PREFERRED 2
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#define BT_VOICE 11
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struct bt_voice {
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__u16 setting;
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};
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#define BT_VOICE_TRANSPARENT 0x0003
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#define BT_VOICE_CVSD_16BIT 0x0060
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#define BT_SNDMTU 12
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#define BT_RCVMTU 13
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__printf(1, 2)
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void bt_info(const char *fmt, ...);
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__printf(1, 2)
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void bt_warn(const char *fmt, ...);
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__printf(1, 2)
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void bt_err(const char *fmt, ...);
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__printf(1, 2)
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void bt_err_ratelimited(const char *fmt, ...);
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#define BT_INFO(fmt, ...) bt_info(fmt "\n", ##__VA_ARGS__)
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#define BT_WARN(fmt, ...) bt_warn(fmt "\n", ##__VA_ARGS__)
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#define BT_ERR(fmt, ...) bt_err(fmt "\n", ##__VA_ARGS__)
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#define BT_DBG(fmt, ...) pr_debug(fmt "\n", ##__VA_ARGS__)
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#define BT_ERR_RATELIMITED(fmt, ...) bt_err_ratelimited(fmt "\n", ##__VA_ARGS__)
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#define bt_dev_info(hdev, fmt, ...) \
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BT_INFO("%s: " fmt, (hdev)->name, ##__VA_ARGS__)
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#define bt_dev_warn(hdev, fmt, ...) \
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BT_WARN("%s: " fmt, (hdev)->name, ##__VA_ARGS__)
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#define bt_dev_err(hdev, fmt, ...) \
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BT_ERR("%s: " fmt, (hdev)->name, ##__VA_ARGS__)
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#define bt_dev_dbg(hdev, fmt, ...) \
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BT_DBG("%s: " fmt, (hdev)->name, ##__VA_ARGS__)
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#define bt_dev_err_ratelimited(hdev, fmt, ...) \
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BT_ERR_RATELIMITED("%s: " fmt, (hdev)->name, ##__VA_ARGS__)
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/* Connection and socket states */
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enum {
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BT_CONNECTED = 1, /* Equal to TCP_ESTABLISHED to make net code happy */
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BT_OPEN,
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BT_BOUND,
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BT_LISTEN,
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BT_CONNECT,
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BT_CONNECT2,
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BT_CONFIG,
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BT_DISCONN,
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BT_CLOSED
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};
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/* If unused will be removed by compiler */
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static inline const char *state_to_string(int state)
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{
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switch (state) {
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case BT_CONNECTED:
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return "BT_CONNECTED";
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case BT_OPEN:
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return "BT_OPEN";
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case BT_BOUND:
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return "BT_BOUND";
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case BT_LISTEN:
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return "BT_LISTEN";
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case BT_CONNECT:
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return "BT_CONNECT";
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case BT_CONNECT2:
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return "BT_CONNECT2";
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case BT_CONFIG:
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return "BT_CONFIG";
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case BT_DISCONN:
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return "BT_DISCONN";
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case BT_CLOSED:
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return "BT_CLOSED";
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}
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return "invalid state";
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}
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/* BD Address */
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typedef struct {
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__u8 b[6];
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} __packed bdaddr_t;
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/* BD Address type */
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#define BDADDR_BREDR 0x00
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#define BDADDR_LE_PUBLIC 0x01
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#define BDADDR_LE_RANDOM 0x02
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static inline bool bdaddr_type_is_valid(u8 type)
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{
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switch (type) {
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case BDADDR_BREDR:
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case BDADDR_LE_PUBLIC:
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case BDADDR_LE_RANDOM:
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return true;
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}
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return false;
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}
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static inline bool bdaddr_type_is_le(u8 type)
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{
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switch (type) {
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case BDADDR_LE_PUBLIC:
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case BDADDR_LE_RANDOM:
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return true;
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}
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return false;
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}
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#define BDADDR_ANY (&(bdaddr_t) {{0, 0, 0, 0, 0, 0}})
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#define BDADDR_NONE (&(bdaddr_t) {{0xff, 0xff, 0xff, 0xff, 0xff, 0xff}})
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/* Copy, swap, convert BD Address */
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static inline int bacmp(const bdaddr_t *ba1, const bdaddr_t *ba2)
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{
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return memcmp(ba1, ba2, sizeof(bdaddr_t));
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}
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static inline void bacpy(bdaddr_t *dst, const bdaddr_t *src)
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{
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memcpy(dst, src, sizeof(bdaddr_t));
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}
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void baswap(bdaddr_t *dst, const bdaddr_t *src);
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/* Common socket structures and functions */
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#define bt_sk(__sk) ((struct bt_sock *) __sk)
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struct bt_sock {
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struct sock sk;
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struct list_head accept_q;
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struct sock *parent;
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unsigned long flags;
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void (*skb_msg_name)(struct sk_buff *, void *, int *);
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};
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enum {
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BT_SK_DEFER_SETUP,
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BT_SK_SUSPEND,
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};
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struct bt_sock_list {
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struct hlist_head head;
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rwlock_t lock;
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#ifdef CONFIG_PROC_FS
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int (* custom_seq_show)(struct seq_file *, void *);
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#endif
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};
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int bt_sock_register(int proto, const struct net_proto_family *ops);
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void bt_sock_unregister(int proto);
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void bt_sock_link(struct bt_sock_list *l, struct sock *s);
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void bt_sock_unlink(struct bt_sock_list *l, struct sock *s);
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int bt_sock_recvmsg(struct socket *sock, struct msghdr *msg, size_t len,
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int flags);
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int bt_sock_stream_recvmsg(struct socket *sock, struct msghdr *msg,
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size_t len, int flags);
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uint bt_sock_poll(struct file *file, struct socket *sock, poll_table *wait);
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int bt_sock_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg);
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int bt_sock_wait_state(struct sock *sk, int state, unsigned long timeo);
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int bt_sock_wait_ready(struct sock *sk, unsigned long flags);
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void bt_accept_enqueue(struct sock *parent, struct sock *sk);
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void bt_accept_unlink(struct sock *sk);
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struct sock *bt_accept_dequeue(struct sock *parent, struct socket *newsock);
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/* Skb helpers */
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struct l2cap_ctrl {
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u8 sframe:1,
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poll:1,
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final:1,
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fcs:1,
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sar:2,
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super:2;
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u16 reqseq;
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u16 txseq;
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u8 retries;
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__le16 psm;
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bdaddr_t bdaddr;
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struct l2cap_chan *chan;
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};
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struct hci_dev;
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typedef void (*hci_req_complete_t)(struct hci_dev *hdev, u8 status, u16 opcode);
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typedef void (*hci_req_complete_skb_t)(struct hci_dev *hdev, u8 status,
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u16 opcode, struct sk_buff *skb);
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#define HCI_REQ_START BIT(0)
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#define HCI_REQ_SKB BIT(1)
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struct hci_ctrl {
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u16 opcode;
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u8 req_flags;
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u8 req_event;
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union {
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hci_req_complete_t req_complete;
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hci_req_complete_skb_t req_complete_skb;
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};
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};
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struct bt_skb_cb {
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u8 pkt_type;
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u8 force_active;
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u16 expect;
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u8 incoming:1;
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union {
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struct l2cap_ctrl l2cap;
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struct hci_ctrl hci;
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};
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};
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#define bt_cb(skb) ((struct bt_skb_cb *)((skb)->cb))
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#define hci_skb_pkt_type(skb) bt_cb((skb))->pkt_type
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#define hci_skb_expect(skb) bt_cb((skb))->expect
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#define hci_skb_opcode(skb) bt_cb((skb))->hci.opcode
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static inline struct sk_buff *bt_skb_alloc(unsigned int len, gfp_t how)
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{
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struct sk_buff *skb;
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skb = alloc_skb(len + BT_SKB_RESERVE, how);
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if (skb)
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skb_reserve(skb, BT_SKB_RESERVE);
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return skb;
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}
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static inline struct sk_buff *bt_skb_send_alloc(struct sock *sk,
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unsigned long len, int nb, int *err)
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{
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struct sk_buff *skb;
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skb = sock_alloc_send_skb(sk, len + BT_SKB_RESERVE, nb, err);
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if (skb)
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skb_reserve(skb, BT_SKB_RESERVE);
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if (!skb && *err)
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return NULL;
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*err = sock_error(sk);
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if (*err)
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goto out;
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if (sk->sk_shutdown) {
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*err = -ECONNRESET;
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goto out;
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}
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return skb;
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out:
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kfree_skb(skb);
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return NULL;
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}
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int bt_to_errno(u16 code);
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void hci_sock_set_flag(struct sock *sk, int nr);
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void hci_sock_clear_flag(struct sock *sk, int nr);
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int hci_sock_test_flag(struct sock *sk, int nr);
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unsigned short hci_sock_get_channel(struct sock *sk);
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u32 hci_sock_get_cookie(struct sock *sk);
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int hci_sock_init(void);
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void hci_sock_cleanup(void);
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int bt_sysfs_init(void);
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void bt_sysfs_cleanup(void);
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int bt_procfs_init(struct net *net, const char *name,
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struct bt_sock_list *sk_list,
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int (*seq_show)(struct seq_file *, void *));
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void bt_procfs_cleanup(struct net *net, const char *name);
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extern struct dentry *bt_debugfs;
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int l2cap_init(void);
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void l2cap_exit(void);
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#if IS_ENABLED(CONFIG_BT_BREDR)
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int sco_init(void);
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void sco_exit(void);
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#else
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static inline int sco_init(void)
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{
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return 0;
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}
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static inline void sco_exit(void)
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{
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}
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#endif
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int mgmt_init(void);
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void mgmt_exit(void);
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void bt_sock_reclassify_lock(struct sock *sk, int proto);
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#endif /* __BLUETOOTH_H */
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