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
69 #define BT_SECURITY_SDP 0
70 #define BT_SECURITY_LOW 1
71 #define BT_SECURITY_MEDIUM 2
72 #define BT_SECURITY_HIGH 3
73 #define BT_SECURITY_FIPS 4
75 #define BT_DEFER_SETUP 7
77 #define BT_FLUSHABLE 8
79 #define BT_FLUSHABLE_OFF 0
80 #define BT_FLUSHABLE_ON 1
86 #define BT_POWER_FORCE_ACTIVE_OFF 0
87 #define BT_POWER_FORCE_ACTIVE_ON 1
89 #define BT_CHANNEL_POLICY 10
91 /* BR/EDR only (default policy)
92 * AMP controllers cannot be used.
93 * Channel move requests from the remote device are denied.
94 * If the L2CAP channel is currently using AMP, move the channel to BR/EDR.
96 #define BT_CHANNEL_POLICY_BREDR_ONLY 0
99 * Allow use of AMP controllers.
100 * If the L2CAP channel is currently on AMP, move it to BR/EDR.
101 * Channel move requests from the remote device are allowed.
103 #define BT_CHANNEL_POLICY_BREDR_PREFERRED 1
106 * Allow use of AMP controllers
107 * If the L2CAP channel is currently on BR/EDR and AMP controller
108 * resources are available, initiate a channel move to AMP.
109 * Channel move requests from the remote device are allowed.
110 * If the L2CAP socket has not been connected yet, try to create
111 * and configure the channel directly on an AMP controller rather
114 #define BT_CHANNEL_POLICY_AMP_PREFERRED 2
121 #define BT_VOICE_TRANSPARENT 0x0003
122 #define BT_VOICE_CVSD_16BIT 0x0060
128 #define BT_PHY_BR_1M_1SLOT 0x00000001
129 #define BT_PHY_BR_1M_3SLOT 0x00000002
130 #define BT_PHY_BR_1M_5SLOT 0x00000004
131 #define BT_PHY_EDR_2M_1SLOT 0x00000008
132 #define BT_PHY_EDR_2M_3SLOT 0x00000010
133 #define BT_PHY_EDR_2M_5SLOT 0x00000020
134 #define BT_PHY_EDR_3M_1SLOT 0x00000040
135 #define BT_PHY_EDR_3M_3SLOT 0x00000080
136 #define BT_PHY_EDR_3M_5SLOT 0x00000100
137 #define BT_PHY_LE_1M_TX 0x00000200
138 #define BT_PHY_LE_1M_RX 0x00000400
139 #define BT_PHY_LE_2M_TX 0x00000800
140 #define BT_PHY_LE_2M_RX 0x00001000
141 #define BT_PHY_LE_CODED_TX 0x00002000
142 #define BT_PHY_LE_CODED_RX 0x00004000
146 #define BT_MODE_BASIC 0x00
147 #define BT_MODE_ERTM 0x01
148 #define BT_MODE_STREAMING 0x02
149 #define BT_MODE_LE_FLOWCTL 0x03
150 #define BT_MODE_EXT_FLOWCTL 0x04
152 #define BT_PKT_STATUS 16
154 #define BT_SCM_PKT_STATUS 0x03
158 struct bt_codec_caps {
173 struct bt_codec codecs[];
176 #define BT_CODEC_CVSD 0x02
177 #define BT_CODEC_TRANSPARENT 0x03
178 #define BT_CODEC_MSBC 0x05
181 void bt_info(const char *fmt, ...);
183 void bt_warn(const char *fmt, ...);
185 void bt_err(const char *fmt, ...);
186 #if IS_ENABLED(CONFIG_BT_FEATURE_DEBUG)
187 void bt_dbg_set(bool enable);
188 bool bt_dbg_get(void);
190 void bt_dbg(const char *fmt, ...);
193 void bt_warn_ratelimited(const char *fmt, ...);
195 void bt_err_ratelimited(const char *fmt, ...);
197 #define BT_INFO(fmt, ...) bt_info(fmt "\n", ##__VA_ARGS__)
198 #define BT_WARN(fmt, ...) bt_warn(fmt "\n", ##__VA_ARGS__)
199 #define BT_ERR(fmt, ...) bt_err(fmt "\n", ##__VA_ARGS__)
201 #if IS_ENABLED(CONFIG_BT_FEATURE_DEBUG)
202 #define BT_DBG(fmt, ...) bt_dbg(fmt "\n", ##__VA_ARGS__)
204 #define BT_DBG(fmt, ...) pr_debug(fmt "\n", ##__VA_ARGS__)
207 #define bt_dev_info(hdev, fmt, ...) \
208 BT_INFO("%s: " fmt, (hdev)->name, ##__VA_ARGS__)
209 #define bt_dev_warn(hdev, fmt, ...) \
210 BT_WARN("%s: " fmt, (hdev)->name, ##__VA_ARGS__)
211 #define bt_dev_err(hdev, fmt, ...) \
212 BT_ERR("%s: " fmt, (hdev)->name, ##__VA_ARGS__)
213 #define bt_dev_dbg(hdev, fmt, ...) \
214 BT_DBG("%s: " fmt, (hdev)->name, ##__VA_ARGS__)
216 #define bt_dev_warn_ratelimited(hdev, fmt, ...) \
217 bt_warn_ratelimited("%s: " fmt, (hdev)->name, ##__VA_ARGS__)
218 #define bt_dev_err_ratelimited(hdev, fmt, ...) \
219 bt_err_ratelimited("%s: " fmt, (hdev)->name, ##__VA_ARGS__)
221 /* Connection and socket states */
223 BT_CONNECTED = 1, /* Equal to TCP_ESTABLISHED to make net code happy */
234 /* If unused will be removed by compiler */
235 static inline const char *state_to_string(int state)
239 return "BT_CONNECTED";
249 return "BT_CONNECT2";
258 return "invalid state";
266 /* BD Address type */
267 #define BDADDR_BREDR 0x00
268 #define BDADDR_LE_PUBLIC 0x01
269 #define BDADDR_LE_RANDOM 0x02
271 static inline bool bdaddr_type_is_valid(u8 type)
275 case BDADDR_LE_PUBLIC:
276 case BDADDR_LE_RANDOM:
283 static inline bool bdaddr_type_is_le(u8 type)
286 case BDADDR_LE_PUBLIC:
287 case BDADDR_LE_RANDOM:
294 #define BDADDR_ANY (&(bdaddr_t) {{0, 0, 0, 0, 0, 0}})
295 #define BDADDR_NONE (&(bdaddr_t) {{0xff, 0xff, 0xff, 0xff, 0xff, 0xff}})
297 /* Copy, swap, convert BD Address */
298 static inline int bacmp(const bdaddr_t *ba1, const bdaddr_t *ba2)
300 return memcmp(ba1, ba2, sizeof(bdaddr_t));
302 static inline void bacpy(bdaddr_t *dst, const bdaddr_t *src)
304 memcpy(dst, src, sizeof(bdaddr_t));
307 void baswap(bdaddr_t *dst, const bdaddr_t *src);
309 /* Common socket structures and functions */
311 #define bt_sk(__sk) ((struct bt_sock *) __sk)
315 struct list_head accept_q;
318 void (*skb_msg_name)(struct sk_buff *, void *, int *);
319 void (*skb_put_cmsg)(struct sk_buff *, struct msghdr *, struct sock *);
327 struct bt_sock_list {
328 struct hlist_head head;
330 #ifdef CONFIG_PROC_FS
331 int (* custom_seq_show)(struct seq_file *, void *);
335 int bt_sock_register(int proto, const struct net_proto_family *ops);
336 void bt_sock_unregister(int proto);
337 void bt_sock_link(struct bt_sock_list *l, struct sock *s);
338 void bt_sock_unlink(struct bt_sock_list *l, struct sock *s);
339 int bt_sock_recvmsg(struct socket *sock, struct msghdr *msg, size_t len,
341 int bt_sock_stream_recvmsg(struct socket *sock, struct msghdr *msg,
342 size_t len, int flags);
343 __poll_t bt_sock_poll(struct file *file, struct socket *sock, poll_table *wait);
344 int bt_sock_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg);
345 int bt_sock_wait_state(struct sock *sk, int state, unsigned long timeo);
346 int bt_sock_wait_ready(struct sock *sk, unsigned long flags);
348 void bt_accept_enqueue(struct sock *parent, struct sock *sk, bool bh);
349 void bt_accept_unlink(struct sock *sk);
350 struct sock *bt_accept_dequeue(struct sock *parent, struct socket *newsock);
366 struct l2cap_chan *chan;
375 typedef void (*hci_req_complete_t)(struct hci_dev *hdev, u8 status, u16 opcode);
376 typedef void (*hci_req_complete_skb_t)(struct hci_dev *hdev, u8 status,
377 u16 opcode, struct sk_buff *skb);
379 #define HCI_REQ_START BIT(0)
380 #define HCI_REQ_SKB BIT(1)
388 hci_req_complete_t req_complete;
389 hci_req_complete_skb_t req_complete_skb;
394 struct hci_dev *hdev;
404 struct l2cap_ctrl l2cap;
407 struct mgmt_ctrl mgmt;
410 #define bt_cb(skb) ((struct bt_skb_cb *)((skb)->cb))
412 #define hci_skb_pkt_type(skb) bt_cb((skb))->pkt_type
413 #define hci_skb_expect(skb) bt_cb((skb))->expect
414 #define hci_skb_opcode(skb) bt_cb((skb))->hci.opcode
415 #define hci_skb_event(skb) bt_cb((skb))->hci.req_event
416 #define hci_skb_sk(skb) bt_cb((skb))->hci.sk
418 static inline struct sk_buff *bt_skb_alloc(unsigned int len, gfp_t how)
422 skb = alloc_skb(len + BT_SKB_RESERVE, how);
424 skb_reserve(skb, BT_SKB_RESERVE);
428 static inline struct sk_buff *bt_skb_send_alloc(struct sock *sk,
429 unsigned long len, int nb, int *err)
433 skb = sock_alloc_send_skb(sk, len + BT_SKB_RESERVE, nb, err);
435 skb_reserve(skb, BT_SKB_RESERVE);
440 *err = sock_error(sk);
444 if (sk->sk_shutdown) {
456 /* Shall not be called with lock_sock held */
457 static inline struct sk_buff *bt_skb_sendmsg(struct sock *sk,
459 size_t len, size_t mtu,
460 size_t headroom, size_t tailroom)
463 size_t size = min_t(size_t, len, mtu);
466 skb = bt_skb_send_alloc(sk, size + headroom + tailroom,
467 msg->msg_flags & MSG_DONTWAIT, &err);
471 skb_reserve(skb, headroom);
472 skb_tailroom_reserve(skb, mtu, tailroom);
474 if (!copy_from_iter_full(skb_put(skb, size), size, &msg->msg_iter)) {
476 return ERR_PTR(-EFAULT);
479 skb->priority = sk->sk_priority;
484 /* Similar to bt_skb_sendmsg but can split the msg into multiple fragments
485 * accourding to the MTU.
487 static inline struct sk_buff *bt_skb_sendmmsg(struct sock *sk,
489 size_t len, size_t mtu,
490 size_t headroom, size_t tailroom)
492 struct sk_buff *skb, **frag;
494 skb = bt_skb_sendmsg(sk, msg, len, mtu, headroom, tailroom);
495 if (IS_ERR_OR_NULL(skb))
502 /* Add remaining data over MTU as continuation fragments */
503 frag = &skb_shinfo(skb)->frag_list;
507 tmp = bt_skb_sendmsg(sk, msg, len, mtu, headroom, tailroom);
516 frag = &(*frag)->next;
522 int bt_to_errno(u16 code);
524 void hci_sock_set_flag(struct sock *sk, int nr);
525 void hci_sock_clear_flag(struct sock *sk, int nr);
526 int hci_sock_test_flag(struct sock *sk, int nr);
527 unsigned short hci_sock_get_channel(struct sock *sk);
528 u32 hci_sock_get_cookie(struct sock *sk);
530 int hci_sock_init(void);
531 void hci_sock_cleanup(void);
533 int bt_sysfs_init(void);
534 void bt_sysfs_cleanup(void);
536 int bt_procfs_init(struct net *net, const char *name,
537 struct bt_sock_list *sk_list,
538 int (*seq_show)(struct seq_file *, void *));
539 void bt_procfs_cleanup(struct net *net, const char *name);
541 extern struct dentry *bt_debugfs;
543 int l2cap_init(void);
544 void l2cap_exit(void);
546 #if IS_ENABLED(CONFIG_BT_BREDR)
550 static inline int sco_init(void)
555 static inline void sco_exit(void)
561 void mgmt_exit(void);
563 void bt_sock_reclassify_lock(struct sock *sk, int proto);
565 #endif /* __BLUETOOTH_H */