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 #ifndef AF_BLUETOOTH 33 #define AF_BLUETOOTH 31 34 #define PF_BLUETOOTH AF_BLUETOOTH 35 #endif 36 37 /* Bluetooth versions */ 38 #define BLUETOOTH_VER_1_1 1 39 #define BLUETOOTH_VER_1_2 2 40 #define BLUETOOTH_VER_2_0 3 41 42 /* Reserv for core and drivers use */ 43 #define BT_SKB_RESERVE 8 44 45 #define BTPROTO_L2CAP 0 46 #define BTPROTO_HCI 1 47 #define BTPROTO_SCO 2 48 #define BTPROTO_RFCOMM 3 49 #define BTPROTO_BNEP 4 50 #define BTPROTO_CMTP 5 51 #define BTPROTO_HIDP 6 52 #define BTPROTO_AVDTP 7 53 54 #define SOL_HCI 0 55 #define SOL_L2CAP 6 56 #define SOL_SCO 17 57 #define SOL_RFCOMM 18 58 59 #define BT_SECURITY 4 60 struct bt_security { 61 __u8 level; 62 __u8 key_size; 63 }; 64 #define BT_SECURITY_SDP 0 65 #define BT_SECURITY_LOW 1 66 #define BT_SECURITY_MEDIUM 2 67 #define BT_SECURITY_HIGH 3 68 #define BT_SECURITY_FIPS 4 69 70 #define BT_DEFER_SETUP 7 71 72 #define BT_FLUSHABLE 8 73 74 #define BT_FLUSHABLE_OFF 0 75 #define BT_FLUSHABLE_ON 1 76 77 #define BT_POWER 9 78 struct bt_power { 79 __u8 force_active; 80 }; 81 #define BT_POWER_FORCE_ACTIVE_OFF 0 82 #define BT_POWER_FORCE_ACTIVE_ON 1 83 84 #define BT_CHANNEL_POLICY 10 85 86 /* BR/EDR only (default policy) 87 * AMP controllers cannot be used. 88 * Channel move requests from the remote device are denied. 89 * If the L2CAP channel is currently using AMP, move the channel to BR/EDR. 90 */ 91 #define BT_CHANNEL_POLICY_BREDR_ONLY 0 92 93 /* BR/EDR Preferred 94 * Allow use of AMP controllers. 95 * If the L2CAP channel is currently on AMP, move it to BR/EDR. 96 * Channel move requests from the remote device are allowed. 97 */ 98 #define BT_CHANNEL_POLICY_BREDR_PREFERRED 1 99 100 /* AMP Preferred 101 * Allow use of AMP controllers 102 * If the L2CAP channel is currently on BR/EDR and AMP controller 103 * resources are available, initiate a channel move to AMP. 104 * Channel move requests from the remote device are allowed. 105 * If the L2CAP socket has not been connected yet, try to create 106 * and configure the channel directly on an AMP controller rather 107 * than BR/EDR. 108 */ 109 #define BT_CHANNEL_POLICY_AMP_PREFERRED 2 110 111 #define BT_VOICE 11 112 struct bt_voice { 113 __u16 setting; 114 }; 115 116 #define BT_VOICE_TRANSPARENT 0x0003 117 #define BT_VOICE_CVSD_16BIT 0x0060 118 119 #define BT_SNDMTU 12 120 #define BT_RCVMTU 13 121 122 __printf(1, 2) 123 void bt_info(const char *fmt, ...); 124 __printf(1, 2) 125 void bt_warn(const char *fmt, ...); 126 __printf(1, 2) 127 void bt_err(const char *fmt, ...); 128 __printf(1, 2) 129 void bt_err_ratelimited(const char *fmt, ...); 130 131 #define BT_INFO(fmt, ...) bt_info(fmt "\n", ##__VA_ARGS__) 132 #define BT_WARN(fmt, ...) bt_warn(fmt "\n", ##__VA_ARGS__) 133 #define BT_ERR(fmt, ...) bt_err(fmt "\n", ##__VA_ARGS__) 134 #define BT_DBG(fmt, ...) pr_debug(fmt "\n", ##__VA_ARGS__) 135 136 #define BT_ERR_RATELIMITED(fmt, ...) bt_err_ratelimited(fmt "\n", ##__VA_ARGS__) 137 138 #define bt_dev_info(hdev, fmt, ...) \ 139 BT_INFO("%s: " fmt, (hdev)->name, ##__VA_ARGS__) 140 #define bt_dev_warn(hdev, fmt, ...) \ 141 BT_WARN("%s: " fmt, (hdev)->name, ##__VA_ARGS__) 142 #define bt_dev_err(hdev, fmt, ...) \ 143 BT_ERR("%s: " fmt, (hdev)->name, ##__VA_ARGS__) 144 #define bt_dev_dbg(hdev, fmt, ...) \ 145 BT_DBG("%s: " fmt, (hdev)->name, ##__VA_ARGS__) 146 147 /* Connection and socket states */ 148 enum { 149 BT_CONNECTED = 1, /* Equal to TCP_ESTABLISHED to make net code happy */ 150 BT_OPEN, 151 BT_BOUND, 152 BT_LISTEN, 153 BT_CONNECT, 154 BT_CONNECT2, 155 BT_CONFIG, 156 BT_DISCONN, 157 BT_CLOSED 158 }; 159 160 /* If unused will be removed by compiler */ 161 static inline const char *state_to_string(int state) 162 { 163 switch (state) { 164 case BT_CONNECTED: 165 return "BT_CONNECTED"; 166 case BT_OPEN: 167 return "BT_OPEN"; 168 case BT_BOUND: 169 return "BT_BOUND"; 170 case BT_LISTEN: 171 return "BT_LISTEN"; 172 case BT_CONNECT: 173 return "BT_CONNECT"; 174 case BT_CONNECT2: 175 return "BT_CONNECT2"; 176 case BT_CONFIG: 177 return "BT_CONFIG"; 178 case BT_DISCONN: 179 return "BT_DISCONN"; 180 case BT_CLOSED: 181 return "BT_CLOSED"; 182 } 183 184 return "invalid state"; 185 } 186 187 /* BD Address */ 188 typedef struct { 189 __u8 b[6]; 190 } __packed bdaddr_t; 191 192 /* BD Address type */ 193 #define BDADDR_BREDR 0x00 194 #define BDADDR_LE_PUBLIC 0x01 195 #define BDADDR_LE_RANDOM 0x02 196 197 static inline bool bdaddr_type_is_valid(__u8 type) 198 { 199 switch (type) { 200 case BDADDR_BREDR: 201 case BDADDR_LE_PUBLIC: 202 case BDADDR_LE_RANDOM: 203 return true; 204 } 205 206 return false; 207 } 208 209 static inline bool bdaddr_type_is_le(__u8 type) 210 { 211 switch (type) { 212 case BDADDR_LE_PUBLIC: 213 case BDADDR_LE_RANDOM: 214 return true; 215 } 216 217 return false; 218 } 219 220 #define BDADDR_ANY (&(bdaddr_t) {{0, 0, 0, 0, 0, 0}}) 221 #define BDADDR_NONE (&(bdaddr_t) {{0xff, 0xff, 0xff, 0xff, 0xff, 0xff}}) 222 223 /* Copy, swap, convert BD Address */ 224 static inline int bacmp(const bdaddr_t *ba1, const bdaddr_t *ba2) 225 { 226 return memcmp(ba1, ba2, sizeof(bdaddr_t)); 227 } 228 static inline void bacpy(bdaddr_t *dst, const bdaddr_t *src) 229 { 230 memcpy(dst, src, sizeof(bdaddr_t)); 231 } 232 233 void baswap(bdaddr_t *dst, bdaddr_t *src); 234 235 /* Common socket structures and functions */ 236 237 #define bt_sk(__sk) ((struct bt_sock *) __sk) 238 239 struct bt_sock { 240 struct sock sk; 241 struct list_head accept_q; 242 struct sock *parent; 243 unsigned long flags; 244 void (*skb_msg_name)(struct sk_buff *, void *, int *); 245 }; 246 247 enum { 248 BT_SK_DEFER_SETUP, 249 BT_SK_SUSPEND, 250 }; 251 252 struct bt_sock_list { 253 struct hlist_head head; 254 rwlock_t lock; 255 #ifdef CONFIG_PROC_FS 256 int (* custom_seq_show)(struct seq_file *, void *); 257 #endif 258 }; 259 260 int bt_sock_register(int proto, const struct net_proto_family *ops); 261 void bt_sock_unregister(int proto); 262 void bt_sock_link(struct bt_sock_list *l, struct sock *s); 263 void bt_sock_unlink(struct bt_sock_list *l, struct sock *s); 264 int bt_sock_recvmsg(struct socket *sock, struct msghdr *msg, size_t len, 265 int flags); 266 int bt_sock_stream_recvmsg(struct socket *sock, struct msghdr *msg, 267 size_t len, int flags); 268 uint bt_sock_poll(struct file *file, struct socket *sock, poll_table *wait); 269 int bt_sock_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg); 270 int bt_sock_wait_state(struct sock *sk, int state, unsigned long timeo); 271 int bt_sock_wait_ready(struct sock *sk, unsigned long flags); 272 273 void bt_accept_enqueue(struct sock *parent, struct sock *sk); 274 void bt_accept_unlink(struct sock *sk); 275 struct sock *bt_accept_dequeue(struct sock *parent, struct socket *newsock); 276 277 /* Skb helpers */ 278 struct l2cap_ctrl { 279 __u8 sframe:1, 280 poll:1, 281 final:1, 282 fcs:1, 283 sar:2, 284 super:2; 285 __u16 reqseq; 286 __u16 txseq; 287 __u8 retries; 288 __le16 psm; 289 bdaddr_t bdaddr; 290 struct l2cap_chan *chan; 291 }; 292 293 struct hci_dev; 294 295 typedef void (*hci_req_complete_t)(struct hci_dev *hdev, u8 status, u16 opcode); 296 typedef void (*hci_req_complete_skb_t)(struct hci_dev *hdev, u8 status, 297 u16 opcode, struct sk_buff *skb); 298 299 struct hci_ctrl { 300 __u16 opcode; 301 bool req_start; 302 u8 req_event; 303 hci_req_complete_t req_complete; 304 hci_req_complete_skb_t req_complete_skb; 305 }; 306 307 struct bt_skb_cb { 308 __u8 pkt_type; 309 __u8 force_active; 310 __u16 expect; 311 __u8 incoming:1; 312 union { 313 struct l2cap_ctrl l2cap; 314 struct hci_ctrl hci; 315 }; 316 }; 317 #define bt_cb(skb) ((struct bt_skb_cb *)((skb)->cb)) 318 319 static inline struct sk_buff *bt_skb_alloc(unsigned int len, gfp_t how) 320 { 321 struct sk_buff *skb; 322 323 skb = alloc_skb(len + BT_SKB_RESERVE, how); 324 if (skb) { 325 skb_reserve(skb, BT_SKB_RESERVE); 326 bt_cb(skb)->incoming = 0; 327 } 328 return skb; 329 } 330 331 static inline struct sk_buff *bt_skb_send_alloc(struct sock *sk, 332 unsigned long len, int nb, int *err) 333 { 334 struct sk_buff *skb; 335 336 skb = sock_alloc_send_skb(sk, len + BT_SKB_RESERVE, nb, err); 337 if (skb) { 338 skb_reserve(skb, BT_SKB_RESERVE); 339 bt_cb(skb)->incoming = 0; 340 } 341 342 if (!skb && *err) 343 return NULL; 344 345 *err = sock_error(sk); 346 if (*err) 347 goto out; 348 349 if (sk->sk_shutdown) { 350 *err = -ECONNRESET; 351 goto out; 352 } 353 354 return skb; 355 356 out: 357 kfree_skb(skb); 358 return NULL; 359 } 360 361 int bt_to_errno(__u16 code); 362 363 void hci_sock_set_flag(struct sock *sk, int nr); 364 void hci_sock_clear_flag(struct sock *sk, int nr); 365 int hci_sock_test_flag(struct sock *sk, int nr); 366 unsigned short hci_sock_get_channel(struct sock *sk); 367 368 int hci_sock_init(void); 369 void hci_sock_cleanup(void); 370 371 int bt_sysfs_init(void); 372 void bt_sysfs_cleanup(void); 373 374 int bt_procfs_init(struct net *net, const char *name, 375 struct bt_sock_list *sk_list, 376 int (*seq_show)(struct seq_file *, void *)); 377 void bt_procfs_cleanup(struct net *net, const char *name); 378 379 extern struct dentry *bt_debugfs; 380 381 int l2cap_init(void); 382 void l2cap_exit(void); 383 384 #if IS_ENABLED(CONFIG_BT_BREDR) 385 int sco_init(void); 386 void sco_exit(void); 387 #else 388 static inline int sco_init(void) 389 { 390 return 0; 391 } 392 393 static inline void sco_exit(void) 394 { 395 } 396 #endif 397 398 int mgmt_init(void); 399 void mgmt_exit(void); 400 401 void bt_sock_reclassify_lock(struct sock *sk, int proto); 402 403 #endif /* __BLUETOOTH_H */ 404