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_err(const char *fmt, ...); 126 __printf(1, 2) 127 void bt_err_ratelimited(const char *fmt, ...); 128 129 #define BT_INFO(fmt, ...) bt_info(fmt "\n", ##__VA_ARGS__) 130 #define BT_ERR(fmt, ...) bt_err(fmt "\n", ##__VA_ARGS__) 131 #define BT_DBG(fmt, ...) pr_debug(fmt "\n", ##__VA_ARGS__) 132 133 #define BT_ERR_RATELIMITED(fmt, ...) bt_err_ratelimited(fmt "\n", ##__VA_ARGS__) 134 135 #define bt_dev_info(hdev, fmt, ...) \ 136 BT_INFO("%s: " fmt, (hdev)->name, ##__VA_ARGS__) 137 #define bt_dev_err(hdev, fmt, ...) \ 138 BT_ERR("%s: " fmt, (hdev)->name, ##__VA_ARGS__) 139 #define bt_dev_dbg(hdev, fmt, ...) \ 140 BT_DBG("%s: " fmt, (hdev)->name, ##__VA_ARGS__) 141 142 /* Connection and socket states */ 143 enum { 144 BT_CONNECTED = 1, /* Equal to TCP_ESTABLISHED to make net code happy */ 145 BT_OPEN, 146 BT_BOUND, 147 BT_LISTEN, 148 BT_CONNECT, 149 BT_CONNECT2, 150 BT_CONFIG, 151 BT_DISCONN, 152 BT_CLOSED 153 }; 154 155 /* If unused will be removed by compiler */ 156 static inline const char *state_to_string(int state) 157 { 158 switch (state) { 159 case BT_CONNECTED: 160 return "BT_CONNECTED"; 161 case BT_OPEN: 162 return "BT_OPEN"; 163 case BT_BOUND: 164 return "BT_BOUND"; 165 case BT_LISTEN: 166 return "BT_LISTEN"; 167 case BT_CONNECT: 168 return "BT_CONNECT"; 169 case BT_CONNECT2: 170 return "BT_CONNECT2"; 171 case BT_CONFIG: 172 return "BT_CONFIG"; 173 case BT_DISCONN: 174 return "BT_DISCONN"; 175 case BT_CLOSED: 176 return "BT_CLOSED"; 177 } 178 179 return "invalid state"; 180 } 181 182 /* BD Address */ 183 typedef struct { 184 __u8 b[6]; 185 } __packed bdaddr_t; 186 187 /* BD Address type */ 188 #define BDADDR_BREDR 0x00 189 #define BDADDR_LE_PUBLIC 0x01 190 #define BDADDR_LE_RANDOM 0x02 191 192 static inline bool bdaddr_type_is_valid(__u8 type) 193 { 194 switch (type) { 195 case BDADDR_BREDR: 196 case BDADDR_LE_PUBLIC: 197 case BDADDR_LE_RANDOM: 198 return true; 199 } 200 201 return false; 202 } 203 204 static inline bool bdaddr_type_is_le(__u8 type) 205 { 206 switch (type) { 207 case BDADDR_LE_PUBLIC: 208 case BDADDR_LE_RANDOM: 209 return true; 210 } 211 212 return false; 213 } 214 215 #define BDADDR_ANY (&(bdaddr_t) {{0, 0, 0, 0, 0, 0}}) 216 #define BDADDR_NONE (&(bdaddr_t) {{0xff, 0xff, 0xff, 0xff, 0xff, 0xff}}) 217 218 /* Copy, swap, convert BD Address */ 219 static inline int bacmp(const bdaddr_t *ba1, const bdaddr_t *ba2) 220 { 221 return memcmp(ba1, ba2, sizeof(bdaddr_t)); 222 } 223 static inline void bacpy(bdaddr_t *dst, const bdaddr_t *src) 224 { 225 memcpy(dst, src, sizeof(bdaddr_t)); 226 } 227 228 void baswap(bdaddr_t *dst, bdaddr_t *src); 229 230 /* Common socket structures and functions */ 231 232 #define bt_sk(__sk) ((struct bt_sock *) __sk) 233 234 struct bt_sock { 235 struct sock sk; 236 struct list_head accept_q; 237 struct sock *parent; 238 unsigned long flags; 239 void (*skb_msg_name)(struct sk_buff *, void *, int *); 240 }; 241 242 enum { 243 BT_SK_DEFER_SETUP, 244 BT_SK_SUSPEND, 245 }; 246 247 struct bt_sock_list { 248 struct hlist_head head; 249 rwlock_t lock; 250 #ifdef CONFIG_PROC_FS 251 int (* custom_seq_show)(struct seq_file *, void *); 252 #endif 253 }; 254 255 int bt_sock_register(int proto, const struct net_proto_family *ops); 256 void bt_sock_unregister(int proto); 257 void bt_sock_link(struct bt_sock_list *l, struct sock *s); 258 void bt_sock_unlink(struct bt_sock_list *l, struct sock *s); 259 int bt_sock_recvmsg(struct socket *sock, struct msghdr *msg, size_t len, 260 int flags); 261 int bt_sock_stream_recvmsg(struct socket *sock, struct msghdr *msg, 262 size_t len, int flags); 263 uint bt_sock_poll(struct file *file, struct socket *sock, poll_table *wait); 264 int bt_sock_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg); 265 int bt_sock_wait_state(struct sock *sk, int state, unsigned long timeo); 266 int bt_sock_wait_ready(struct sock *sk, unsigned long flags); 267 268 void bt_accept_enqueue(struct sock *parent, struct sock *sk); 269 void bt_accept_unlink(struct sock *sk); 270 struct sock *bt_accept_dequeue(struct sock *parent, struct socket *newsock); 271 272 /* Skb helpers */ 273 struct l2cap_ctrl { 274 __u8 sframe:1, 275 poll:1, 276 final:1, 277 fcs:1, 278 sar:2, 279 super:2; 280 __u16 reqseq; 281 __u16 txseq; 282 __u8 retries; 283 __le16 psm; 284 bdaddr_t bdaddr; 285 struct l2cap_chan *chan; 286 }; 287 288 struct hci_dev; 289 290 typedef void (*hci_req_complete_t)(struct hci_dev *hdev, u8 status, u16 opcode); 291 typedef void (*hci_req_complete_skb_t)(struct hci_dev *hdev, u8 status, 292 u16 opcode, struct sk_buff *skb); 293 294 struct req_ctrl { 295 bool start; 296 u8 event; 297 hci_req_complete_t complete; 298 hci_req_complete_skb_t complete_skb; 299 }; 300 301 struct bt_skb_cb { 302 __u8 pkt_type; 303 __u8 force_active; 304 __u16 opcode; 305 __u16 expect; 306 __u8 incoming:1; 307 union { 308 struct l2cap_ctrl l2cap; 309 struct req_ctrl req; 310 }; 311 }; 312 #define bt_cb(skb) ((struct bt_skb_cb *)((skb)->cb)) 313 314 static inline struct sk_buff *bt_skb_alloc(unsigned int len, gfp_t how) 315 { 316 struct sk_buff *skb; 317 318 skb = alloc_skb(len + BT_SKB_RESERVE, how); 319 if (skb) { 320 skb_reserve(skb, BT_SKB_RESERVE); 321 bt_cb(skb)->incoming = 0; 322 } 323 return skb; 324 } 325 326 static inline struct sk_buff *bt_skb_send_alloc(struct sock *sk, 327 unsigned long len, int nb, int *err) 328 { 329 struct sk_buff *skb; 330 331 skb = sock_alloc_send_skb(sk, len + BT_SKB_RESERVE, nb, err); 332 if (skb) { 333 skb_reserve(skb, BT_SKB_RESERVE); 334 bt_cb(skb)->incoming = 0; 335 } 336 337 if (!skb && *err) 338 return NULL; 339 340 *err = sock_error(sk); 341 if (*err) 342 goto out; 343 344 if (sk->sk_shutdown) { 345 *err = -ECONNRESET; 346 goto out; 347 } 348 349 return skb; 350 351 out: 352 kfree_skb(skb); 353 return NULL; 354 } 355 356 int bt_to_errno(__u16 code); 357 358 void hci_sock_set_flag(struct sock *sk, int nr); 359 void hci_sock_clear_flag(struct sock *sk, int nr); 360 int hci_sock_test_flag(struct sock *sk, int nr); 361 unsigned short hci_sock_get_channel(struct sock *sk); 362 363 int hci_sock_init(void); 364 void hci_sock_cleanup(void); 365 366 int bt_sysfs_init(void); 367 void bt_sysfs_cleanup(void); 368 369 int bt_procfs_init(struct net *net, const char *name, 370 struct bt_sock_list *sk_list, 371 int (*seq_show)(struct seq_file *, void *)); 372 void bt_procfs_cleanup(struct net *net, const char *name); 373 374 extern struct dentry *bt_debugfs; 375 376 int l2cap_init(void); 377 void l2cap_exit(void); 378 379 #if IS_ENABLED(CONFIG_BT_BREDR) 380 int sco_init(void); 381 void sco_exit(void); 382 #else 383 static inline int sco_init(void) 384 { 385 return 0; 386 } 387 388 static inline void sco_exit(void) 389 { 390 } 391 #endif 392 393 int mgmt_init(void); 394 void mgmt_exit(void); 395 396 void bt_sock_reclassify_lock(struct sock *sk, int proto); 397 398 #endif /* __BLUETOOTH_H */ 399