1 /* 2 BlueZ - Bluetooth protocol stack for Linux 3 Copyright (C) 2000-2001 Qualcomm Incorporated 4 5 Written 2000,2001 by Maxim Krasnyansky <maxk@qualcomm.com> 6 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; 10 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. 19 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. 23 */ 24 25 #ifndef __BLUETOOTH_H 26 #define __BLUETOOTH_H 27 28 #include <linux/poll.h> 29 #include <net/sock.h> 30 #include <linux/seq_file.h> 31 32 #define BT_SUBSYS_VERSION 2 33 #define BT_SUBSYS_REVISION 22 34 35 #ifndef AF_BLUETOOTH 36 #define AF_BLUETOOTH 31 37 #define PF_BLUETOOTH AF_BLUETOOTH 38 #endif 39 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 45 /* Reserv for core and drivers use */ 46 #define BT_SKB_RESERVE 8 47 48 #define BTPROTO_L2CAP 0 49 #define BTPROTO_HCI 1 50 #define BTPROTO_SCO 2 51 #define BTPROTO_RFCOMM 3 52 #define BTPROTO_BNEP 4 53 #define BTPROTO_CMTP 5 54 #define BTPROTO_HIDP 6 55 #define BTPROTO_AVDTP 7 56 57 #define SOL_HCI 0 58 #define SOL_L2CAP 6 59 #define SOL_SCO 17 60 #define SOL_RFCOMM 18 61 62 #define BT_SECURITY 4 63 struct bt_security { 64 __u8 level; 65 __u8 key_size; 66 }; 67 #define BT_SECURITY_SDP 0 68 #define BT_SECURITY_LOW 1 69 #define BT_SECURITY_MEDIUM 2 70 #define BT_SECURITY_HIGH 3 71 #define BT_SECURITY_FIPS 4 72 73 #define BT_DEFER_SETUP 7 74 75 #define BT_FLUSHABLE 8 76 77 #define BT_FLUSHABLE_OFF 0 78 #define BT_FLUSHABLE_ON 1 79 80 #define BT_POWER 9 81 struct bt_power { 82 __u8 force_active; 83 }; 84 #define BT_POWER_FORCE_ACTIVE_OFF 0 85 #define BT_POWER_FORCE_ACTIVE_ON 1 86 87 #define BT_CHANNEL_POLICY 10 88 89 /* BR/EDR only (default policy) 90 * AMP controllers cannot be used. 91 * Channel move requests from the remote device are denied. 92 * If the L2CAP channel is currently using AMP, move the channel to BR/EDR. 93 */ 94 #define BT_CHANNEL_POLICY_BREDR_ONLY 0 95 96 /* BR/EDR Preferred 97 * Allow use of AMP controllers. 98 * If the L2CAP channel is currently on AMP, move it to BR/EDR. 99 * Channel move requests from the remote device are allowed. 100 */ 101 #define BT_CHANNEL_POLICY_BREDR_PREFERRED 1 102 103 /* AMP Preferred 104 * Allow use of AMP controllers 105 * If the L2CAP channel is currently on BR/EDR and AMP controller 106 * resources are available, initiate a channel move to AMP. 107 * Channel move requests from the remote device are allowed. 108 * If the L2CAP socket has not been connected yet, try to create 109 * and configure the channel directly on an AMP controller rather 110 * than BR/EDR. 111 */ 112 #define BT_CHANNEL_POLICY_AMP_PREFERRED 2 113 114 #define BT_VOICE 11 115 struct bt_voice { 116 __u16 setting; 117 }; 118 119 #define BT_VOICE_TRANSPARENT 0x0003 120 #define BT_VOICE_CVSD_16BIT 0x0060 121 122 #define BT_SNDMTU 12 123 #define BT_RCVMTU 13 124 125 __printf(1, 2) 126 void bt_info(const char *fmt, ...); 127 __printf(1, 2) 128 void bt_warn(const char *fmt, ...); 129 __printf(1, 2) 130 void bt_err(const char *fmt, ...); 131 __printf(1, 2) 132 void bt_err_ratelimited(const char *fmt, ...); 133 134 #define BT_INFO(fmt, ...) bt_info(fmt "\n", ##__VA_ARGS__) 135 #define BT_WARN(fmt, ...) bt_warn(fmt "\n", ##__VA_ARGS__) 136 #define BT_ERR(fmt, ...) bt_err(fmt "\n", ##__VA_ARGS__) 137 #define BT_DBG(fmt, ...) pr_debug(fmt "\n", ##__VA_ARGS__) 138 139 #define BT_ERR_RATELIMITED(fmt, ...) bt_err_ratelimited(fmt "\n", ##__VA_ARGS__) 140 141 #define bt_dev_info(hdev, fmt, ...) \ 142 BT_INFO("%s: " fmt, (hdev)->name, ##__VA_ARGS__) 143 #define bt_dev_warn(hdev, fmt, ...) \ 144 BT_WARN("%s: " fmt, (hdev)->name, ##__VA_ARGS__) 145 #define bt_dev_err(hdev, fmt, ...) \ 146 BT_ERR("%s: " fmt, (hdev)->name, ##__VA_ARGS__) 147 #define bt_dev_dbg(hdev, fmt, ...) \ 148 BT_DBG("%s: " fmt, (hdev)->name, ##__VA_ARGS__) 149 150 #define bt_dev_err_ratelimited(hdev, fmt, ...) \ 151 BT_ERR_RATELIMITED("%s: " fmt, (hdev)->name, ##__VA_ARGS__) 152 153 /* Connection and socket states */ 154 enum { 155 BT_CONNECTED = 1, /* Equal to TCP_ESTABLISHED to make net code happy */ 156 BT_OPEN, 157 BT_BOUND, 158 BT_LISTEN, 159 BT_CONNECT, 160 BT_CONNECT2, 161 BT_CONFIG, 162 BT_DISCONN, 163 BT_CLOSED 164 }; 165 166 /* If unused will be removed by compiler */ 167 static inline const char *state_to_string(int state) 168 { 169 switch (state) { 170 case BT_CONNECTED: 171 return "BT_CONNECTED"; 172 case BT_OPEN: 173 return "BT_OPEN"; 174 case BT_BOUND: 175 return "BT_BOUND"; 176 case BT_LISTEN: 177 return "BT_LISTEN"; 178 case BT_CONNECT: 179 return "BT_CONNECT"; 180 case BT_CONNECT2: 181 return "BT_CONNECT2"; 182 case BT_CONFIG: 183 return "BT_CONFIG"; 184 case BT_DISCONN: 185 return "BT_DISCONN"; 186 case BT_CLOSED: 187 return "BT_CLOSED"; 188 } 189 190 return "invalid state"; 191 } 192 193 /* BD Address */ 194 typedef struct { 195 __u8 b[6]; 196 } __packed bdaddr_t; 197 198 /* BD Address type */ 199 #define BDADDR_BREDR 0x00 200 #define BDADDR_LE_PUBLIC 0x01 201 #define BDADDR_LE_RANDOM 0x02 202 203 static inline bool bdaddr_type_is_valid(u8 type) 204 { 205 switch (type) { 206 case BDADDR_BREDR: 207 case BDADDR_LE_PUBLIC: 208 case BDADDR_LE_RANDOM: 209 return true; 210 } 211 212 return false; 213 } 214 215 static inline bool bdaddr_type_is_le(u8 type) 216 { 217 switch (type) { 218 case BDADDR_LE_PUBLIC: 219 case BDADDR_LE_RANDOM: 220 return true; 221 } 222 223 return false; 224 } 225 226 #define BDADDR_ANY (&(bdaddr_t) {{0, 0, 0, 0, 0, 0}}) 227 #define BDADDR_NONE (&(bdaddr_t) {{0xff, 0xff, 0xff, 0xff, 0xff, 0xff}}) 228 229 /* Copy, swap, convert BD Address */ 230 static inline int bacmp(const bdaddr_t *ba1, const bdaddr_t *ba2) 231 { 232 return memcmp(ba1, ba2, sizeof(bdaddr_t)); 233 } 234 static inline void bacpy(bdaddr_t *dst, const bdaddr_t *src) 235 { 236 memcpy(dst, src, sizeof(bdaddr_t)); 237 } 238 239 void baswap(bdaddr_t *dst, const bdaddr_t *src); 240 241 /* Common socket structures and functions */ 242 243 #define bt_sk(__sk) ((struct bt_sock *) __sk) 244 245 struct bt_sock { 246 struct sock sk; 247 struct list_head accept_q; 248 struct sock *parent; 249 unsigned long flags; 250 void (*skb_msg_name)(struct sk_buff *, void *, int *); 251 }; 252 253 enum { 254 BT_SK_DEFER_SETUP, 255 BT_SK_SUSPEND, 256 }; 257 258 struct bt_sock_list { 259 struct hlist_head head; 260 rwlock_t lock; 261 #ifdef CONFIG_PROC_FS 262 int (* custom_seq_show)(struct seq_file *, void *); 263 #endif 264 }; 265 266 int bt_sock_register(int proto, const struct net_proto_family *ops); 267 void bt_sock_unregister(int proto); 268 void bt_sock_link(struct bt_sock_list *l, struct sock *s); 269 void bt_sock_unlink(struct bt_sock_list *l, struct sock *s); 270 int bt_sock_recvmsg(struct socket *sock, struct msghdr *msg, size_t len, 271 int flags); 272 int bt_sock_stream_recvmsg(struct socket *sock, struct msghdr *msg, 273 size_t len, int flags); 274 __poll_t bt_sock_poll(struct file *file, struct socket *sock, poll_table *wait); 275 int bt_sock_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg); 276 int bt_sock_wait_state(struct sock *sk, int state, unsigned long timeo); 277 int bt_sock_wait_ready(struct sock *sk, unsigned long flags); 278 279 void bt_accept_enqueue(struct sock *parent, struct sock *sk); 280 void bt_accept_unlink(struct sock *sk); 281 struct sock *bt_accept_dequeue(struct sock *parent, struct socket *newsock); 282 283 /* Skb helpers */ 284 struct l2cap_ctrl { 285 u8 sframe:1, 286 poll:1, 287 final:1, 288 fcs:1, 289 sar:2, 290 super:2; 291 292 u16 reqseq; 293 u16 txseq; 294 u8 retries; 295 __le16 psm; 296 bdaddr_t bdaddr; 297 struct l2cap_chan *chan; 298 }; 299 300 struct hci_dev; 301 302 typedef void (*hci_req_complete_t)(struct hci_dev *hdev, u8 status, u16 opcode); 303 typedef void (*hci_req_complete_skb_t)(struct hci_dev *hdev, u8 status, 304 u16 opcode, struct sk_buff *skb); 305 306 #define HCI_REQ_START BIT(0) 307 #define HCI_REQ_SKB BIT(1) 308 309 struct hci_ctrl { 310 u16 opcode; 311 u8 req_flags; 312 u8 req_event; 313 union { 314 hci_req_complete_t req_complete; 315 hci_req_complete_skb_t req_complete_skb; 316 }; 317 }; 318 319 struct bt_skb_cb { 320 u8 pkt_type; 321 u8 force_active; 322 u16 expect; 323 u8 incoming:1; 324 union { 325 struct l2cap_ctrl l2cap; 326 struct hci_ctrl hci; 327 }; 328 }; 329 #define bt_cb(skb) ((struct bt_skb_cb *)((skb)->cb)) 330 331 #define hci_skb_pkt_type(skb) bt_cb((skb))->pkt_type 332 #define hci_skb_expect(skb) bt_cb((skb))->expect 333 #define hci_skb_opcode(skb) bt_cb((skb))->hci.opcode 334 335 static inline struct sk_buff *bt_skb_alloc(unsigned int len, gfp_t how) 336 { 337 struct sk_buff *skb; 338 339 skb = alloc_skb(len + BT_SKB_RESERVE, how); 340 if (skb) 341 skb_reserve(skb, BT_SKB_RESERVE); 342 return skb; 343 } 344 345 static inline struct sk_buff *bt_skb_send_alloc(struct sock *sk, 346 unsigned long len, int nb, int *err) 347 { 348 struct sk_buff *skb; 349 350 skb = sock_alloc_send_skb(sk, len + BT_SKB_RESERVE, nb, err); 351 if (skb) 352 skb_reserve(skb, BT_SKB_RESERVE); 353 354 if (!skb && *err) 355 return NULL; 356 357 *err = sock_error(sk); 358 if (*err) 359 goto out; 360 361 if (sk->sk_shutdown) { 362 *err = -ECONNRESET; 363 goto out; 364 } 365 366 return skb; 367 368 out: 369 kfree_skb(skb); 370 return NULL; 371 } 372 373 int bt_to_errno(u16 code); 374 375 void hci_sock_set_flag(struct sock *sk, int nr); 376 void hci_sock_clear_flag(struct sock *sk, int nr); 377 int hci_sock_test_flag(struct sock *sk, int nr); 378 unsigned short hci_sock_get_channel(struct sock *sk); 379 u32 hci_sock_get_cookie(struct sock *sk); 380 381 int hci_sock_init(void); 382 void hci_sock_cleanup(void); 383 384 int bt_sysfs_init(void); 385 void bt_sysfs_cleanup(void); 386 387 int bt_procfs_init(struct net *net, const char *name, 388 struct bt_sock_list *sk_list, 389 int (*seq_show)(struct seq_file *, void *)); 390 void bt_procfs_cleanup(struct net *net, const char *name); 391 392 extern struct dentry *bt_debugfs; 393 394 int l2cap_init(void); 395 void l2cap_exit(void); 396 397 #if IS_ENABLED(CONFIG_BT_BREDR) 398 int sco_init(void); 399 void sco_exit(void); 400 #else 401 static inline int sco_init(void) 402 { 403 return 0; 404 } 405 406 static inline void sco_exit(void) 407 { 408 } 409 #endif 410 411 int mgmt_init(void); 412 void mgmt_exit(void); 413 414 void bt_sock_reclassify_lock(struct sock *sk, int proto); 415 416 #endif /* __BLUETOOTH_H */ 417