2 BlueZ - Bluetooth protocol stack for Linux
3 Copyright (C) 2000-2001 Qualcomm Incorporated
5 Written 2000,2001 by Maxim Krasnyansky <maxk@qualcomm.com>
7 This program is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License version 2 as
9 published by the Free Software Foundation;
11 THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
12 OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
13 FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT OF THIRD PARTY RIGHTS.
14 IN NO EVENT SHALL THE COPYRIGHT HOLDER(S) AND AUTHOR(S) BE LIABLE FOR ANY
15 CLAIM, OR ANY SPECIAL INDIRECT OR CONSEQUENTIAL DAMAGES, OR ANY DAMAGES
16 WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
17 ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
18 OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
20 ALL LIABILITY, INCLUDING LIABILITY FOR INFRINGEMENT OF ANY PATENTS,
21 COPYRIGHTS, TRADEMARKS OR OTHER RIGHTS, RELATING TO USE OF THIS
22 SOFTWARE IS DISCLAIMED.
28 #include <linux/poll.h>
30 #include <linux/seq_file.h>
32 #define BT_SUBSYS_VERSION 2
33 #define BT_SUBSYS_REVISION 22
36 #define AF_BLUETOOTH 31
37 #define PF_BLUETOOTH AF_BLUETOOTH
40 /* Bluetooth versions */
41 #define BLUETOOTH_VER_1_1 1
42 #define BLUETOOTH_VER_1_2 2
43 #define BLUETOOTH_VER_2_0 3
44 #define BLUETOOTH_VER_2_1 4
45 #define BLUETOOTH_VER_4_0 6
47 /* Reserv for core and drivers use */
48 #define BT_SKB_RESERVE 8
50 #define BTPROTO_L2CAP 0
53 #define BTPROTO_RFCOMM 3
54 #define BTPROTO_BNEP 4
55 #define BTPROTO_CMTP 5
56 #define BTPROTO_HIDP 6
57 #define BTPROTO_AVDTP 7
59 #define BTPROTO_LAST BTPROTO_ISO
71 #define BT_SECURITY_SDP 0
72 #define BT_SECURITY_LOW 1
73 #define BT_SECURITY_MEDIUM 2
74 #define BT_SECURITY_HIGH 3
75 #define BT_SECURITY_FIPS 4
77 #define BT_DEFER_SETUP 7
79 #define BT_FLUSHABLE 8
81 #define BT_FLUSHABLE_OFF 0
82 #define BT_FLUSHABLE_ON 1
88 #define BT_POWER_FORCE_ACTIVE_OFF 0
89 #define BT_POWER_FORCE_ACTIVE_ON 1
91 #define BT_CHANNEL_POLICY 10
93 /* BR/EDR only (default policy)
94 * AMP controllers cannot be used.
95 * Channel move requests from the remote device are denied.
96 * If the L2CAP channel is currently using AMP, move the channel to BR/EDR.
98 #define BT_CHANNEL_POLICY_BREDR_ONLY 0
101 * Allow use of AMP controllers.
102 * If the L2CAP channel is currently on AMP, move it to BR/EDR.
103 * Channel move requests from the remote device are allowed.
105 #define BT_CHANNEL_POLICY_BREDR_PREFERRED 1
108 * Allow use of AMP controllers
109 * If the L2CAP channel is currently on BR/EDR and AMP controller
110 * resources are available, initiate a channel move to AMP.
111 * Channel move requests from the remote device are allowed.
112 * If the L2CAP socket has not been connected yet, try to create
113 * and configure the channel directly on an AMP controller rather
116 #define BT_CHANNEL_POLICY_AMP_PREFERRED 2
123 #define BT_VOICE_TRANSPARENT 0x0003
124 #define BT_VOICE_CVSD_16BIT 0x0060
130 #define BT_PHY_BR_1M_1SLOT 0x00000001
131 #define BT_PHY_BR_1M_3SLOT 0x00000002
132 #define BT_PHY_BR_1M_5SLOT 0x00000004
133 #define BT_PHY_EDR_2M_1SLOT 0x00000008
134 #define BT_PHY_EDR_2M_3SLOT 0x00000010
135 #define BT_PHY_EDR_2M_5SLOT 0x00000020
136 #define BT_PHY_EDR_3M_1SLOT 0x00000040
137 #define BT_PHY_EDR_3M_3SLOT 0x00000080
138 #define BT_PHY_EDR_3M_5SLOT 0x00000100
139 #define BT_PHY_LE_1M_TX 0x00000200
140 #define BT_PHY_LE_1M_RX 0x00000400
141 #define BT_PHY_LE_2M_TX 0x00000800
142 #define BT_PHY_LE_2M_RX 0x00001000
143 #define BT_PHY_LE_CODED_TX 0x00002000
144 #define BT_PHY_LE_CODED_RX 0x00004000
148 #define BT_MODE_BASIC 0x00
149 #define BT_MODE_ERTM 0x01
150 #define BT_MODE_STREAMING 0x02
151 #define BT_MODE_LE_FLOWCTL 0x03
152 #define BT_MODE_EXT_FLOWCTL 0x04
154 #define BT_PKT_STATUS 16
156 #define BT_SCM_PKT_STATUS 0x03
158 #define BT_ISO_QOS 17
160 #define BT_ISO_QOS_CIG_UNSET 0xff
161 #define BT_ISO_QOS_CIS_UNSET 0xff
163 #define BT_ISO_QOS_BIG_UNSET 0xff
164 #define BT_ISO_QOS_BIS_UNSET 0xff
166 struct bt_iso_io_qos {
189 struct bt_iso_io_qos in;
190 struct bt_iso_io_qos out;
193 #define BT_ISO_PHY_1M 0x01
194 #define BT_ISO_PHY_2M 0x02
195 #define BT_ISO_PHY_CODED 0x04
196 #define BT_ISO_PHY_ANY (BT_ISO_PHY_1M | BT_ISO_PHY_2M | \
201 struct bt_codec_caps {
216 struct bt_codec codecs[];
219 #define BT_CODEC_CVSD 0x02
220 #define BT_CODEC_TRANSPARENT 0x03
221 #define BT_CODEC_MSBC 0x05
223 #define BT_ISO_BASE 20
226 void bt_info(const char *fmt, ...);
228 void bt_warn(const char *fmt, ...);
230 void bt_err(const char *fmt, ...);
231 #if IS_ENABLED(CONFIG_BT_FEATURE_DEBUG)
232 void bt_dbg_set(bool enable);
233 bool bt_dbg_get(void);
235 void bt_dbg(const char *fmt, ...);
238 void bt_warn_ratelimited(const char *fmt, ...);
240 void bt_err_ratelimited(const char *fmt, ...);
242 #define BT_INFO(fmt, ...) bt_info(fmt "\n", ##__VA_ARGS__)
243 #define BT_WARN(fmt, ...) bt_warn(fmt "\n", ##__VA_ARGS__)
244 #define BT_ERR(fmt, ...) bt_err(fmt "\n", ##__VA_ARGS__)
246 #if IS_ENABLED(CONFIG_BT_FEATURE_DEBUG)
247 #define BT_DBG(fmt, ...) bt_dbg(fmt "\n", ##__VA_ARGS__)
249 #define BT_DBG(fmt, ...) pr_debug(fmt "\n", ##__VA_ARGS__)
252 #define bt_dev_name(hdev) ((hdev) ? (hdev)->name : "null")
254 #define bt_dev_info(hdev, fmt, ...) \
255 BT_INFO("%s: " fmt, bt_dev_name(hdev), ##__VA_ARGS__)
256 #define bt_dev_warn(hdev, fmt, ...) \
257 BT_WARN("%s: " fmt, bt_dev_name(hdev), ##__VA_ARGS__)
258 #define bt_dev_err(hdev, fmt, ...) \
259 BT_ERR("%s: " fmt, bt_dev_name(hdev), ##__VA_ARGS__)
260 #define bt_dev_dbg(hdev, fmt, ...) \
261 BT_DBG("%s: " fmt, bt_dev_name(hdev), ##__VA_ARGS__)
263 #define bt_dev_warn_ratelimited(hdev, fmt, ...) \
264 bt_warn_ratelimited("%s: " fmt, bt_dev_name(hdev), ##__VA_ARGS__)
265 #define bt_dev_err_ratelimited(hdev, fmt, ...) \
266 bt_err_ratelimited("%s: " fmt, bt_dev_name(hdev), ##__VA_ARGS__)
268 /* Connection and socket states */
270 BT_CONNECTED = 1, /* Equal to TCP_ESTABLISHED to make net code happy */
281 /* If unused will be removed by compiler */
282 static inline const char *state_to_string(int state)
286 return "BT_CONNECTED";
296 return "BT_CONNECT2";
305 return "invalid state";
313 /* BD Address type */
314 #define BDADDR_BREDR 0x00
315 #define BDADDR_LE_PUBLIC 0x01
316 #define BDADDR_LE_RANDOM 0x02
318 static inline bool bdaddr_type_is_valid(u8 type)
322 case BDADDR_LE_PUBLIC:
323 case BDADDR_LE_RANDOM:
330 static inline bool bdaddr_type_is_le(u8 type)
333 case BDADDR_LE_PUBLIC:
334 case BDADDR_LE_RANDOM:
341 #define BDADDR_ANY (&(bdaddr_t) {{0, 0, 0, 0, 0, 0}})
342 #define BDADDR_NONE (&(bdaddr_t) {{0xff, 0xff, 0xff, 0xff, 0xff, 0xff}})
344 /* Copy, swap, convert BD Address */
345 static inline int bacmp(const bdaddr_t *ba1, const bdaddr_t *ba2)
347 return memcmp(ba1, ba2, sizeof(bdaddr_t));
349 static inline void bacpy(bdaddr_t *dst, const bdaddr_t *src)
351 memcpy(dst, src, sizeof(bdaddr_t));
354 void baswap(bdaddr_t *dst, const bdaddr_t *src);
356 /* Common socket structures and functions */
358 #define bt_sk(__sk) ((struct bt_sock *) __sk)
362 struct list_head accept_q;
365 void (*skb_msg_name)(struct sk_buff *, void *, int *);
366 void (*skb_put_cmsg)(struct sk_buff *, struct msghdr *, struct sock *);
374 struct bt_sock_list {
375 struct hlist_head head;
377 #ifdef CONFIG_PROC_FS
378 int (* custom_seq_show)(struct seq_file *, void *);
382 int bt_sock_register(int proto, const struct net_proto_family *ops);
383 void bt_sock_unregister(int proto);
384 void bt_sock_link(struct bt_sock_list *l, struct sock *s);
385 void bt_sock_unlink(struct bt_sock_list *l, struct sock *s);
386 int bt_sock_recvmsg(struct socket *sock, struct msghdr *msg, size_t len,
388 int bt_sock_stream_recvmsg(struct socket *sock, struct msghdr *msg,
389 size_t len, int flags);
390 __poll_t bt_sock_poll(struct file *file, struct socket *sock, poll_table *wait);
391 int bt_sock_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg);
392 int bt_sock_wait_state(struct sock *sk, int state, unsigned long timeo);
393 int bt_sock_wait_ready(struct sock *sk, unsigned int msg_flags);
395 void bt_accept_enqueue(struct sock *parent, struct sock *sk, bool bh);
396 void bt_accept_unlink(struct sock *sk);
397 struct sock *bt_accept_dequeue(struct sock *parent, struct socket *newsock);
413 struct l2cap_chan *chan;
422 typedef void (*hci_req_complete_t)(struct hci_dev *hdev, u8 status, u16 opcode);
423 typedef void (*hci_req_complete_skb_t)(struct hci_dev *hdev, u8 status,
424 u16 opcode, struct sk_buff *skb);
426 #define HCI_REQ_START BIT(0)
427 #define HCI_REQ_SKB BIT(1)
435 hci_req_complete_t req_complete;
436 hci_req_complete_skb_t req_complete_skb;
441 struct hci_dev *hdev;
451 struct l2cap_ctrl l2cap;
454 struct mgmt_ctrl mgmt;
457 #define bt_cb(skb) ((struct bt_skb_cb *)((skb)->cb))
459 #define hci_skb_pkt_type(skb) bt_cb((skb))->pkt_type
460 #define hci_skb_expect(skb) bt_cb((skb))->expect
461 #define hci_skb_opcode(skb) bt_cb((skb))->hci.opcode
462 #define hci_skb_event(skb) bt_cb((skb))->hci.req_event
463 #define hci_skb_sk(skb) bt_cb((skb))->hci.sk
465 static inline struct sk_buff *bt_skb_alloc(unsigned int len, gfp_t how)
469 skb = alloc_skb(len + BT_SKB_RESERVE, how);
471 skb_reserve(skb, BT_SKB_RESERVE);
475 static inline struct sk_buff *bt_skb_send_alloc(struct sock *sk,
476 unsigned long len, int nb, int *err)
480 skb = sock_alloc_send_skb(sk, len + BT_SKB_RESERVE, nb, err);
482 skb_reserve(skb, BT_SKB_RESERVE);
487 *err = sock_error(sk);
491 if (sk->sk_shutdown) {
503 /* Shall not be called with lock_sock held */
504 static inline struct sk_buff *bt_skb_sendmsg(struct sock *sk,
506 size_t len, size_t mtu,
507 size_t headroom, size_t tailroom)
510 size_t size = min_t(size_t, len, mtu);
513 skb = bt_skb_send_alloc(sk, size + headroom + tailroom,
514 msg->msg_flags & MSG_DONTWAIT, &err);
518 skb_reserve(skb, headroom);
519 skb_tailroom_reserve(skb, mtu, tailroom);
521 if (!copy_from_iter_full(skb_put(skb, size), size, &msg->msg_iter)) {
523 return ERR_PTR(-EFAULT);
526 skb->priority = sk->sk_priority;
531 /* Similar to bt_skb_sendmsg but can split the msg into multiple fragments
532 * accourding to the MTU.
534 static inline struct sk_buff *bt_skb_sendmmsg(struct sock *sk,
536 size_t len, size_t mtu,
537 size_t headroom, size_t tailroom)
539 struct sk_buff *skb, **frag;
541 skb = bt_skb_sendmsg(sk, msg, len, mtu, headroom, tailroom);
549 /* Add remaining data over MTU as continuation fragments */
550 frag = &skb_shinfo(skb)->frag_list;
554 tmp = bt_skb_sendmsg(sk, msg, len, mtu, headroom, tailroom);
562 frag = &(*frag)->next;
568 int bt_to_errno(u16 code);
569 __u8 bt_status(int err);
571 void hci_sock_set_flag(struct sock *sk, int nr);
572 void hci_sock_clear_flag(struct sock *sk, int nr);
573 int hci_sock_test_flag(struct sock *sk, int nr);
574 unsigned short hci_sock_get_channel(struct sock *sk);
575 u32 hci_sock_get_cookie(struct sock *sk);
577 int hci_sock_init(void);
578 void hci_sock_cleanup(void);
580 int bt_sysfs_init(void);
581 void bt_sysfs_cleanup(void);
583 int bt_procfs_init(struct net *net, const char *name,
584 struct bt_sock_list *sk_list,
585 int (*seq_show)(struct seq_file *, void *));
586 void bt_procfs_cleanup(struct net *net, const char *name);
588 extern struct dentry *bt_debugfs;
590 int l2cap_init(void);
591 void l2cap_exit(void);
593 #if IS_ENABLED(CONFIG_BT_BREDR)
597 static inline int sco_init(void)
602 static inline void sco_exit(void)
607 #if IS_ENABLED(CONFIG_BT_LE)
610 bool iso_enabled(void);
612 static inline int iso_init(void)
617 static inline int iso_exit(void)
622 static inline bool iso_enabled(void)
629 void mgmt_exit(void);
631 void bt_sock_reclassify_lock(struct sock *sk, int proto);
633 #endif /* __BLUETOOTH_H */