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 "2.21" 33 34 #ifndef AF_BLUETOOTH 35 #define AF_BLUETOOTH 31 36 #define PF_BLUETOOTH AF_BLUETOOTH 37 #endif 38 39 /* Bluetooth versions */ 40 #define BLUETOOTH_VER_1_1 1 41 #define BLUETOOTH_VER_1_2 2 42 #define BLUETOOTH_VER_2_0 3 43 44 /* Reserv for core and drivers use */ 45 #define BT_SKB_RESERVE 8 46 47 #define BTPROTO_L2CAP 0 48 #define BTPROTO_HCI 1 49 #define BTPROTO_SCO 2 50 #define BTPROTO_RFCOMM 3 51 #define BTPROTO_BNEP 4 52 #define BTPROTO_CMTP 5 53 #define BTPROTO_HIDP 6 54 #define BTPROTO_AVDTP 7 55 56 #define SOL_HCI 0 57 #define SOL_L2CAP 6 58 #define SOL_SCO 17 59 #define SOL_RFCOMM 18 60 61 #define BT_SECURITY 4 62 struct bt_security { 63 __u8 level; 64 __u8 key_size; 65 }; 66 #define BT_SECURITY_SDP 0 67 #define BT_SECURITY_LOW 1 68 #define BT_SECURITY_MEDIUM 2 69 #define BT_SECURITY_HIGH 3 70 #define BT_SECURITY_FIPS 4 71 72 #define BT_DEFER_SETUP 7 73 74 #define BT_FLUSHABLE 8 75 76 #define BT_FLUSHABLE_OFF 0 77 #define BT_FLUSHABLE_ON 1 78 79 #define BT_POWER 9 80 struct bt_power { 81 __u8 force_active; 82 }; 83 #define BT_POWER_FORCE_ACTIVE_OFF 0 84 #define BT_POWER_FORCE_ACTIVE_ON 1 85 86 #define BT_CHANNEL_POLICY 10 87 88 /* BR/EDR only (default policy) 89 * AMP controllers cannot be used. 90 * Channel move requests from the remote device are denied. 91 * If the L2CAP channel is currently using AMP, move the channel to BR/EDR. 92 */ 93 #define BT_CHANNEL_POLICY_BREDR_ONLY 0 94 95 /* BR/EDR Preferred 96 * Allow use of AMP controllers. 97 * If the L2CAP channel is currently on AMP, move it to BR/EDR. 98 * Channel move requests from the remote device are allowed. 99 */ 100 #define BT_CHANNEL_POLICY_BREDR_PREFERRED 1 101 102 /* AMP Preferred 103 * Allow use of AMP controllers 104 * If the L2CAP channel is currently on BR/EDR and AMP controller 105 * resources are available, initiate a channel move to AMP. 106 * Channel move requests from the remote device are allowed. 107 * If the L2CAP socket has not been connected yet, try to create 108 * and configure the channel directly on an AMP controller rather 109 * than BR/EDR. 110 */ 111 #define BT_CHANNEL_POLICY_AMP_PREFERRED 2 112 113 #define BT_VOICE 11 114 struct bt_voice { 115 __u16 setting; 116 }; 117 118 #define BT_VOICE_TRANSPARENT 0x0003 119 #define BT_VOICE_CVSD_16BIT 0x0060 120 121 #define BT_SNDMTU 12 122 #define BT_RCVMTU 13 123 124 __printf(1, 2) 125 void bt_info(const char *fmt, ...); 126 __printf(1, 2) 127 void bt_warn(const char *fmt, ...); 128 __printf(1, 2) 129 void bt_err(const char *fmt, ...); 130 __printf(1, 2) 131 void bt_err_ratelimited(const char *fmt, ...); 132 133 #define BT_INFO(fmt, ...) bt_info(fmt "\n", ##__VA_ARGS__) 134 #define BT_WARN(fmt, ...) bt_warn(fmt "\n", ##__VA_ARGS__) 135 #define BT_ERR(fmt, ...) bt_err(fmt "\n", ##__VA_ARGS__) 136 #define BT_DBG(fmt, ...) pr_debug(fmt "\n", ##__VA_ARGS__) 137 138 #define BT_ERR_RATELIMITED(fmt, ...) bt_err_ratelimited(fmt "\n", ##__VA_ARGS__) 139 140 #define bt_dev_info(hdev, fmt, ...) \ 141 BT_INFO("%s: " fmt, (hdev)->name, ##__VA_ARGS__) 142 #define bt_dev_warn(hdev, fmt, ...) \ 143 BT_WARN("%s: " fmt, (hdev)->name, ##__VA_ARGS__) 144 #define bt_dev_err(hdev, fmt, ...) \ 145 BT_ERR("%s: " fmt, (hdev)->name, ##__VA_ARGS__) 146 #define bt_dev_dbg(hdev, fmt, ...) \ 147 BT_DBG("%s: " fmt, (hdev)->name, ##__VA_ARGS__) 148 149 /* Connection and socket states */ 150 enum { 151 BT_CONNECTED = 1, /* Equal to TCP_ESTABLISHED to make net code happy */ 152 BT_OPEN, 153 BT_BOUND, 154 BT_LISTEN, 155 BT_CONNECT, 156 BT_CONNECT2, 157 BT_CONFIG, 158 BT_DISCONN, 159 BT_CLOSED 160 }; 161 162 /* If unused will be removed by compiler */ 163 static inline const char *state_to_string(int state) 164 { 165 switch (state) { 166 case BT_CONNECTED: 167 return "BT_CONNECTED"; 168 case BT_OPEN: 169 return "BT_OPEN"; 170 case BT_BOUND: 171 return "BT_BOUND"; 172 case BT_LISTEN: 173 return "BT_LISTEN"; 174 case BT_CONNECT: 175 return "BT_CONNECT"; 176 case BT_CONNECT2: 177 return "BT_CONNECT2"; 178 case BT_CONFIG: 179 return "BT_CONFIG"; 180 case BT_DISCONN: 181 return "BT_DISCONN"; 182 case BT_CLOSED: 183 return "BT_CLOSED"; 184 } 185 186 return "invalid state"; 187 } 188 189 /* BD Address */ 190 typedef struct { 191 __u8 b[6]; 192 } __packed bdaddr_t; 193 194 /* BD Address type */ 195 #define BDADDR_BREDR 0x00 196 #define BDADDR_LE_PUBLIC 0x01 197 #define BDADDR_LE_RANDOM 0x02 198 199 static inline bool bdaddr_type_is_valid(__u8 type) 200 { 201 switch (type) { 202 case BDADDR_BREDR: 203 case BDADDR_LE_PUBLIC: 204 case BDADDR_LE_RANDOM: 205 return true; 206 } 207 208 return false; 209 } 210 211 static inline bool bdaddr_type_is_le(__u8 type) 212 { 213 switch (type) { 214 case BDADDR_LE_PUBLIC: 215 case BDADDR_LE_RANDOM: 216 return true; 217 } 218 219 return false; 220 } 221 222 #define BDADDR_ANY (&(bdaddr_t) {{0, 0, 0, 0, 0, 0}}) 223 #define BDADDR_NONE (&(bdaddr_t) {{0xff, 0xff, 0xff, 0xff, 0xff, 0xff}}) 224 225 /* Copy, swap, convert BD Address */ 226 static inline int bacmp(const bdaddr_t *ba1, const bdaddr_t *ba2) 227 { 228 return memcmp(ba1, ba2, sizeof(bdaddr_t)); 229 } 230 static inline void bacpy(bdaddr_t *dst, const bdaddr_t *src) 231 { 232 memcpy(dst, src, sizeof(bdaddr_t)); 233 } 234 235 void baswap(bdaddr_t *dst, bdaddr_t *src); 236 237 /* Common socket structures and functions */ 238 239 #define bt_sk(__sk) ((struct bt_sock *) __sk) 240 241 struct bt_sock { 242 struct sock sk; 243 struct list_head accept_q; 244 struct sock *parent; 245 unsigned long flags; 246 void (*skb_msg_name)(struct sk_buff *, void *, int *); 247 }; 248 249 enum { 250 BT_SK_DEFER_SETUP, 251 BT_SK_SUSPEND, 252 }; 253 254 struct bt_sock_list { 255 struct hlist_head head; 256 rwlock_t lock; 257 #ifdef CONFIG_PROC_FS 258 int (* custom_seq_show)(struct seq_file *, void *); 259 #endif 260 }; 261 262 int bt_sock_register(int proto, const struct net_proto_family *ops); 263 void bt_sock_unregister(int proto); 264 void bt_sock_link(struct bt_sock_list *l, struct sock *s); 265 void bt_sock_unlink(struct bt_sock_list *l, struct sock *s); 266 int bt_sock_recvmsg(struct socket *sock, struct msghdr *msg, size_t len, 267 int flags); 268 int bt_sock_stream_recvmsg(struct socket *sock, struct msghdr *msg, 269 size_t len, int flags); 270 uint bt_sock_poll(struct file *file, struct socket *sock, poll_table *wait); 271 int bt_sock_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg); 272 int bt_sock_wait_state(struct sock *sk, int state, unsigned long timeo); 273 int bt_sock_wait_ready(struct sock *sk, unsigned long flags); 274 275 void bt_accept_enqueue(struct sock *parent, struct sock *sk); 276 void bt_accept_unlink(struct sock *sk); 277 struct sock *bt_accept_dequeue(struct sock *parent, struct socket *newsock); 278 279 /* Skb helpers */ 280 struct l2cap_ctrl { 281 __u8 sframe:1, 282 poll:1, 283 final:1, 284 fcs:1, 285 sar:2, 286 super:2; 287 __u16 reqseq; 288 __u16 txseq; 289 __u8 retries; 290 __le16 psm; 291 bdaddr_t bdaddr; 292 struct l2cap_chan *chan; 293 }; 294 295 struct hci_dev; 296 297 typedef void (*hci_req_complete_t)(struct hci_dev *hdev, u8 status, u16 opcode); 298 typedef void (*hci_req_complete_skb_t)(struct hci_dev *hdev, u8 status, 299 u16 opcode, struct sk_buff *skb); 300 301 #define HCI_REQ_START BIT(0) 302 #define HCI_REQ_SKB BIT(1) 303 304 struct hci_ctrl { 305 __u16 opcode; 306 u8 req_flags; 307 u8 req_event; 308 union { 309 hci_req_complete_t req_complete; 310 hci_req_complete_skb_t req_complete_skb; 311 }; 312 }; 313 314 struct bt_skb_cb { 315 __u8 pkt_type; 316 __u8 force_active; 317 __u16 expect; 318 __u8 incoming:1; 319 union { 320 struct l2cap_ctrl l2cap; 321 struct hci_ctrl hci; 322 }; 323 }; 324 #define bt_cb(skb) ((struct bt_skb_cb *)((skb)->cb)) 325 326 #define hci_skb_pkt_type(skb) bt_cb((skb))->pkt_type 327 #define hci_skb_expect(skb) bt_cb((skb))->expect 328 #define hci_skb_opcode(skb) bt_cb((skb))->hci.opcode 329 330 static inline struct sk_buff *bt_skb_alloc(unsigned int len, gfp_t how) 331 { 332 struct sk_buff *skb; 333 334 skb = alloc_skb(len + BT_SKB_RESERVE, how); 335 if (skb) 336 skb_reserve(skb, BT_SKB_RESERVE); 337 return skb; 338 } 339 340 static inline struct sk_buff *bt_skb_send_alloc(struct sock *sk, 341 unsigned long len, int nb, int *err) 342 { 343 struct sk_buff *skb; 344 345 skb = sock_alloc_send_skb(sk, len + BT_SKB_RESERVE, nb, err); 346 if (skb) 347 skb_reserve(skb, BT_SKB_RESERVE); 348 349 if (!skb && *err) 350 return NULL; 351 352 *err = sock_error(sk); 353 if (*err) 354 goto out; 355 356 if (sk->sk_shutdown) { 357 *err = -ECONNRESET; 358 goto out; 359 } 360 361 return skb; 362 363 out: 364 kfree_skb(skb); 365 return NULL; 366 } 367 368 int bt_to_errno(__u16 code); 369 370 void hci_sock_set_flag(struct sock *sk, int nr); 371 void hci_sock_clear_flag(struct sock *sk, int nr); 372 int hci_sock_test_flag(struct sock *sk, int nr); 373 unsigned short hci_sock_get_channel(struct sock *sk); 374 375 int hci_sock_init(void); 376 void hci_sock_cleanup(void); 377 378 int bt_sysfs_init(void); 379 void bt_sysfs_cleanup(void); 380 381 int bt_procfs_init(struct net *net, const char *name, 382 struct bt_sock_list *sk_list, 383 int (*seq_show)(struct seq_file *, void *)); 384 void bt_procfs_cleanup(struct net *net, const char *name); 385 386 extern struct dentry *bt_debugfs; 387 388 int l2cap_init(void); 389 void l2cap_exit(void); 390 391 #if IS_ENABLED(CONFIG_BT_BREDR) 392 int sco_init(void); 393 void sco_exit(void); 394 #else 395 static inline int sco_init(void) 396 { 397 return 0; 398 } 399 400 static inline void sco_exit(void) 401 { 402 } 403 #endif 404 405 int mgmt_init(void); 406 void mgmt_exit(void); 407 408 void bt_sock_reclassify_lock(struct sock *sk, int proto); 409 410 #endif /* __BLUETOOTH_H */ 411