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 /* Connection and socket states */ 151 enum { 152 BT_CONNECTED = 1, /* Equal to TCP_ESTABLISHED to make net code happy */ 153 BT_OPEN, 154 BT_BOUND, 155 BT_LISTEN, 156 BT_CONNECT, 157 BT_CONNECT2, 158 BT_CONFIG, 159 BT_DISCONN, 160 BT_CLOSED 161 }; 162 163 /* If unused will be removed by compiler */ 164 static inline const char *state_to_string(int state) 165 { 166 switch (state) { 167 case BT_CONNECTED: 168 return "BT_CONNECTED"; 169 case BT_OPEN: 170 return "BT_OPEN"; 171 case BT_BOUND: 172 return "BT_BOUND"; 173 case BT_LISTEN: 174 return "BT_LISTEN"; 175 case BT_CONNECT: 176 return "BT_CONNECT"; 177 case BT_CONNECT2: 178 return "BT_CONNECT2"; 179 case BT_CONFIG: 180 return "BT_CONFIG"; 181 case BT_DISCONN: 182 return "BT_DISCONN"; 183 case BT_CLOSED: 184 return "BT_CLOSED"; 185 } 186 187 return "invalid state"; 188 } 189 190 /* BD Address */ 191 typedef struct { 192 __u8 b[6]; 193 } __packed bdaddr_t; 194 195 /* BD Address type */ 196 #define BDADDR_BREDR 0x00 197 #define BDADDR_LE_PUBLIC 0x01 198 #define BDADDR_LE_RANDOM 0x02 199 200 static inline bool bdaddr_type_is_valid(__u8 type) 201 { 202 switch (type) { 203 case BDADDR_BREDR: 204 case BDADDR_LE_PUBLIC: 205 case BDADDR_LE_RANDOM: 206 return true; 207 } 208 209 return false; 210 } 211 212 static inline bool bdaddr_type_is_le(__u8 type) 213 { 214 switch (type) { 215 case BDADDR_LE_PUBLIC: 216 case BDADDR_LE_RANDOM: 217 return true; 218 } 219 220 return false; 221 } 222 223 #define BDADDR_ANY (&(bdaddr_t) {{0, 0, 0, 0, 0, 0}}) 224 #define BDADDR_NONE (&(bdaddr_t) {{0xff, 0xff, 0xff, 0xff, 0xff, 0xff}}) 225 226 /* Copy, swap, convert BD Address */ 227 static inline int bacmp(const bdaddr_t *ba1, const bdaddr_t *ba2) 228 { 229 return memcmp(ba1, ba2, sizeof(bdaddr_t)); 230 } 231 static inline void bacpy(bdaddr_t *dst, const bdaddr_t *src) 232 { 233 memcpy(dst, src, sizeof(bdaddr_t)); 234 } 235 236 void baswap(bdaddr_t *dst, bdaddr_t *src); 237 238 /* Common socket structures and functions */ 239 240 #define bt_sk(__sk) ((struct bt_sock *) __sk) 241 242 struct bt_sock { 243 struct sock sk; 244 struct list_head accept_q; 245 struct sock *parent; 246 unsigned long flags; 247 void (*skb_msg_name)(struct sk_buff *, void *, int *); 248 }; 249 250 enum { 251 BT_SK_DEFER_SETUP, 252 BT_SK_SUSPEND, 253 }; 254 255 struct bt_sock_list { 256 struct hlist_head head; 257 rwlock_t lock; 258 #ifdef CONFIG_PROC_FS 259 int (* custom_seq_show)(struct seq_file *, void *); 260 #endif 261 }; 262 263 int bt_sock_register(int proto, const struct net_proto_family *ops); 264 void bt_sock_unregister(int proto); 265 void bt_sock_link(struct bt_sock_list *l, struct sock *s); 266 void bt_sock_unlink(struct bt_sock_list *l, struct sock *s); 267 int bt_sock_recvmsg(struct socket *sock, struct msghdr *msg, size_t len, 268 int flags); 269 int bt_sock_stream_recvmsg(struct socket *sock, struct msghdr *msg, 270 size_t len, int flags); 271 uint bt_sock_poll(struct file *file, struct socket *sock, poll_table *wait); 272 int bt_sock_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg); 273 int bt_sock_wait_state(struct sock *sk, int state, unsigned long timeo); 274 int bt_sock_wait_ready(struct sock *sk, unsigned long flags); 275 276 void bt_accept_enqueue(struct sock *parent, struct sock *sk); 277 void bt_accept_unlink(struct sock *sk); 278 struct sock *bt_accept_dequeue(struct sock *parent, struct socket *newsock); 279 280 /* Skb helpers */ 281 struct l2cap_ctrl { 282 __u8 sframe:1, 283 poll:1, 284 final:1, 285 fcs:1, 286 sar:2, 287 super:2; 288 __u16 reqseq; 289 __u16 txseq; 290 __u8 retries; 291 __le16 psm; 292 bdaddr_t bdaddr; 293 struct l2cap_chan *chan; 294 }; 295 296 struct hci_dev; 297 298 typedef void (*hci_req_complete_t)(struct hci_dev *hdev, u8 status, u16 opcode); 299 typedef void (*hci_req_complete_skb_t)(struct hci_dev *hdev, u8 status, 300 u16 opcode, struct sk_buff *skb); 301 302 #define HCI_REQ_START BIT(0) 303 #define HCI_REQ_SKB BIT(1) 304 305 struct hci_ctrl { 306 __u16 opcode; 307 u8 req_flags; 308 u8 req_event; 309 union { 310 hci_req_complete_t req_complete; 311 hci_req_complete_skb_t req_complete_skb; 312 }; 313 }; 314 315 struct bt_skb_cb { 316 __u8 pkt_type; 317 __u8 force_active; 318 __u16 expect; 319 __u8 incoming:1; 320 union { 321 struct l2cap_ctrl l2cap; 322 struct hci_ctrl hci; 323 }; 324 }; 325 #define bt_cb(skb) ((struct bt_skb_cb *)((skb)->cb)) 326 327 #define hci_skb_pkt_type(skb) bt_cb((skb))->pkt_type 328 #define hci_skb_expect(skb) bt_cb((skb))->expect 329 #define hci_skb_opcode(skb) bt_cb((skb))->hci.opcode 330 331 static inline struct sk_buff *bt_skb_alloc(unsigned int len, gfp_t how) 332 { 333 struct sk_buff *skb; 334 335 skb = alloc_skb(len + BT_SKB_RESERVE, how); 336 if (skb) 337 skb_reserve(skb, BT_SKB_RESERVE); 338 return skb; 339 } 340 341 static inline struct sk_buff *bt_skb_send_alloc(struct sock *sk, 342 unsigned long len, int nb, int *err) 343 { 344 struct sk_buff *skb; 345 346 skb = sock_alloc_send_skb(sk, len + BT_SKB_RESERVE, nb, err); 347 if (skb) 348 skb_reserve(skb, BT_SKB_RESERVE); 349 350 if (!skb && *err) 351 return NULL; 352 353 *err = sock_error(sk); 354 if (*err) 355 goto out; 356 357 if (sk->sk_shutdown) { 358 *err = -ECONNRESET; 359 goto out; 360 } 361 362 return skb; 363 364 out: 365 kfree_skb(skb); 366 return NULL; 367 } 368 369 int bt_to_errno(__u16 code); 370 371 void hci_sock_set_flag(struct sock *sk, int nr); 372 void hci_sock_clear_flag(struct sock *sk, int nr); 373 int hci_sock_test_flag(struct sock *sk, int nr); 374 unsigned short hci_sock_get_channel(struct sock *sk); 375 u32 hci_sock_get_cookie(struct sock *sk); 376 377 int hci_sock_init(void); 378 void hci_sock_cleanup(void); 379 380 int bt_sysfs_init(void); 381 void bt_sysfs_cleanup(void); 382 383 int bt_procfs_init(struct net *net, const char *name, 384 struct bt_sock_list *sk_list, 385 int (*seq_show)(struct seq_file *, void *)); 386 void bt_procfs_cleanup(struct net *net, const char *name); 387 388 extern struct dentry *bt_debugfs; 389 390 int l2cap_init(void); 391 void l2cap_exit(void); 392 393 #if IS_ENABLED(CONFIG_BT_BREDR) 394 int sco_init(void); 395 void sco_exit(void); 396 #else 397 static inline int sco_init(void) 398 { 399 return 0; 400 } 401 402 static inline void sco_exit(void) 403 { 404 } 405 #endif 406 407 int mgmt_init(void); 408 void mgmt_exit(void); 409 410 void bt_sock_reclassify_lock(struct sock *sk, int proto); 411 412 #endif /* __BLUETOOTH_H */ 413