1 /* 2 BlueZ - Bluetooth protocol stack for Linux 3 Copyright (C) 2000-2001 Qualcomm Incorporated 4 Copyright 2023 NXP 5 6 Written 2000,2001 by Maxim Krasnyansky <maxk@qualcomm.com> 7 8 This program is free software; you can redistribute it and/or modify 9 it under the terms of the GNU General Public License version 2 as 10 published by the Free Software Foundation; 11 12 THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS 13 OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 14 FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT OF THIRD PARTY RIGHTS. 15 IN NO EVENT SHALL THE COPYRIGHT HOLDER(S) AND AUTHOR(S) BE LIABLE FOR ANY 16 CLAIM, OR ANY SPECIAL INDIRECT OR CONSEQUENTIAL DAMAGES, OR ANY DAMAGES 17 WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN 18 ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF 19 OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. 20 21 ALL LIABILITY, INCLUDING LIABILITY FOR INFRINGEMENT OF ANY PATENTS, 22 COPYRIGHTS, TRADEMARKS OR OTHER RIGHTS, RELATING TO USE OF THIS 23 SOFTWARE IS DISCLAIMED. 24 */ 25 26 #ifndef __BLUETOOTH_H 27 #define __BLUETOOTH_H 28 29 #include <linux/poll.h> 30 #include <net/sock.h> 31 #include <linux/seq_file.h> 32 #include <linux/ethtool.h> 33 34 #define BT_SUBSYS_VERSION 2 35 #define BT_SUBSYS_REVISION 22 36 37 #ifndef AF_BLUETOOTH 38 #define AF_BLUETOOTH 31 39 #define PF_BLUETOOTH AF_BLUETOOTH 40 #endif 41 42 /* Bluetooth versions */ 43 #define BLUETOOTH_VER_1_1 1 44 #define BLUETOOTH_VER_1_2 2 45 #define BLUETOOTH_VER_2_0 3 46 #define BLUETOOTH_VER_2_1 4 47 #define BLUETOOTH_VER_4_0 6 48 49 /* Reserv for core and drivers use */ 50 #define BT_SKB_RESERVE 8 51 52 #define BTPROTO_L2CAP 0 53 #define BTPROTO_HCI 1 54 #define BTPROTO_SCO 2 55 #define BTPROTO_RFCOMM 3 56 #define BTPROTO_BNEP 4 57 #define BTPROTO_CMTP 5 58 #define BTPROTO_HIDP 6 59 #define BTPROTO_AVDTP 7 60 #define BTPROTO_ISO 8 61 #define BTPROTO_LAST BTPROTO_ISO 62 63 #define SOL_HCI 0 64 #define SOL_L2CAP 6 65 #define SOL_SCO 17 66 #define SOL_RFCOMM 18 67 68 #define BT_SECURITY 4 69 struct bt_security { 70 __u8 level; 71 __u8 key_size; 72 }; 73 #define BT_SECURITY_SDP 0 74 #define BT_SECURITY_LOW 1 75 #define BT_SECURITY_MEDIUM 2 76 #define BT_SECURITY_HIGH 3 77 #define BT_SECURITY_FIPS 4 78 79 #define BT_DEFER_SETUP 7 80 81 #define BT_FLUSHABLE 8 82 83 #define BT_FLUSHABLE_OFF 0 84 #define BT_FLUSHABLE_ON 1 85 86 #define BT_POWER 9 87 struct bt_power { 88 __u8 force_active; 89 }; 90 #define BT_POWER_FORCE_ACTIVE_OFF 0 91 #define BT_POWER_FORCE_ACTIVE_ON 1 92 93 #define BT_CHANNEL_POLICY 10 94 95 /* BR/EDR only (default policy) 96 * AMP controllers cannot be used. 97 * Channel move requests from the remote device are denied. 98 * If the L2CAP channel is currently using AMP, move the channel to BR/EDR. 99 */ 100 #define BT_CHANNEL_POLICY_BREDR_ONLY 0 101 102 /* BR/EDR Preferred 103 * Allow use of AMP controllers. 104 * If the L2CAP channel is currently on AMP, move it to BR/EDR. 105 * Channel move requests from the remote device are allowed. 106 */ 107 #define BT_CHANNEL_POLICY_BREDR_PREFERRED 1 108 109 /* AMP Preferred 110 * Allow use of AMP controllers 111 * If the L2CAP channel is currently on BR/EDR and AMP controller 112 * resources are available, initiate a channel move to AMP. 113 * Channel move requests from the remote device are allowed. 114 * If the L2CAP socket has not been connected yet, try to create 115 * and configure the channel directly on an AMP controller rather 116 * than BR/EDR. 117 */ 118 #define BT_CHANNEL_POLICY_AMP_PREFERRED 2 119 120 #define BT_VOICE 11 121 struct bt_voice { 122 __u16 setting; 123 }; 124 125 #define BT_VOICE_TRANSPARENT 0x0003 126 #define BT_VOICE_CVSD_16BIT 0x0060 127 #define BT_VOICE_TRANSPARENT_16BIT 0x0063 128 129 #define BT_SNDMTU 12 130 #define BT_RCVMTU 13 131 #define BT_PHY 14 132 133 #define BT_PHY_BR_1M_1SLOT 0x00000001 134 #define BT_PHY_BR_1M_3SLOT 0x00000002 135 #define BT_PHY_BR_1M_5SLOT 0x00000004 136 #define BT_PHY_EDR_2M_1SLOT 0x00000008 137 #define BT_PHY_EDR_2M_3SLOT 0x00000010 138 #define BT_PHY_EDR_2M_5SLOT 0x00000020 139 #define BT_PHY_EDR_3M_1SLOT 0x00000040 140 #define BT_PHY_EDR_3M_3SLOT 0x00000080 141 #define BT_PHY_EDR_3M_5SLOT 0x00000100 142 #define BT_PHY_LE_1M_TX 0x00000200 143 #define BT_PHY_LE_1M_RX 0x00000400 144 #define BT_PHY_LE_2M_TX 0x00000800 145 #define BT_PHY_LE_2M_RX 0x00001000 146 #define BT_PHY_LE_CODED_TX 0x00002000 147 #define BT_PHY_LE_CODED_RX 0x00004000 148 149 #define BT_MODE 15 150 151 #define BT_MODE_BASIC 0x00 152 #define BT_MODE_ERTM 0x01 153 #define BT_MODE_STREAMING 0x02 154 #define BT_MODE_LE_FLOWCTL 0x03 155 #define BT_MODE_EXT_FLOWCTL 0x04 156 157 #define BT_PKT_STATUS 16 158 159 #define BT_SCM_PKT_STATUS 0x03 160 #define BT_SCM_ERROR 0x04 161 162 #define BT_ISO_QOS 17 163 164 #define BT_ISO_QOS_CIG_UNSET 0xff 165 #define BT_ISO_QOS_CIS_UNSET 0xff 166 167 #define BT_ISO_QOS_BIG_UNSET 0xff 168 #define BT_ISO_QOS_BIS_UNSET 0xff 169 170 #define BT_ISO_SYNC_TIMEOUT 0x07d0 /* 20 secs */ 171 172 struct bt_iso_io_qos { 173 __u32 interval; 174 __u16 latency; 175 __u16 sdu; 176 __u8 phy; 177 __u8 rtn; 178 }; 179 180 struct bt_iso_ucast_qos { 181 __u8 cig; 182 __u8 cis; 183 __u8 sca; 184 __u8 packing; 185 __u8 framing; 186 struct bt_iso_io_qos in; 187 struct bt_iso_io_qos out; 188 }; 189 190 struct bt_iso_bcast_qos { 191 __u8 big; 192 __u8 bis; 193 __u8 sync_factor; 194 __u8 packing; 195 __u8 framing; 196 struct bt_iso_io_qos in; 197 struct bt_iso_io_qos out; 198 __u8 encryption; 199 __u8 bcode[16]; 200 __u8 options; 201 __u16 skip; 202 __u16 sync_timeout; 203 __u8 sync_cte_type; 204 __u8 mse; 205 __u16 timeout; 206 }; 207 208 struct bt_iso_qos { 209 union { 210 struct bt_iso_ucast_qos ucast; 211 struct bt_iso_bcast_qos bcast; 212 }; 213 }; 214 215 #define BT_ISO_PHY_1M 0x01 216 #define BT_ISO_PHY_2M 0x02 217 #define BT_ISO_PHY_CODED 0x04 218 #define BT_ISO_PHY_ANY (BT_ISO_PHY_1M | BT_ISO_PHY_2M | \ 219 BT_ISO_PHY_CODED) 220 221 #define BT_CODEC 19 222 223 struct bt_codec_caps { 224 __u8 len; 225 __u8 data[]; 226 } __packed; 227 228 struct bt_codec { 229 __u8 id; 230 __u16 cid; 231 __u16 vid; 232 __u8 data_path; 233 __u8 num_caps; 234 } __packed; 235 236 struct bt_codecs { 237 __u8 num_codecs; 238 struct bt_codec codecs[]; 239 } __packed; 240 241 #define BT_CODEC_CVSD 0x02 242 #define BT_CODEC_TRANSPARENT 0x03 243 #define BT_CODEC_MSBC 0x05 244 245 #define BT_ISO_BASE 20 246 247 /* Socket option value 21 reserved */ 248 249 #define BT_PKT_SEQNUM 22 250 251 #define BT_SCM_PKT_SEQNUM 0x05 252 253 __printf(1, 2) 254 void bt_info(const char *fmt, ...); 255 __printf(1, 2) 256 void bt_warn(const char *fmt, ...); 257 __printf(1, 2) 258 void bt_err(const char *fmt, ...); 259 #if IS_ENABLED(CONFIG_BT_FEATURE_DEBUG) 260 void bt_dbg_set(bool enable); 261 bool bt_dbg_get(void); 262 __printf(1, 2) 263 void bt_dbg(const char *fmt, ...); 264 #endif 265 __printf(1, 2) 266 void bt_warn_ratelimited(const char *fmt, ...); 267 __printf(1, 2) 268 void bt_err_ratelimited(const char *fmt, ...); 269 270 #define BT_INFO(fmt, ...) bt_info(fmt "\n", ##__VA_ARGS__) 271 #define BT_WARN(fmt, ...) bt_warn(fmt "\n", ##__VA_ARGS__) 272 #define BT_ERR(fmt, ...) bt_err(fmt "\n", ##__VA_ARGS__) 273 274 #if IS_ENABLED(CONFIG_BT_FEATURE_DEBUG) 275 #define BT_DBG(fmt, ...) \ 276 bt_dbg("%s:%d: " fmt "\n", __func__, __LINE__, ##__VA_ARGS__) 277 #else 278 #define BT_DBG(fmt, ...) pr_debug(fmt "\n", ##__VA_ARGS__) 279 #endif 280 281 #define bt_dev_name(hdev) ((hdev) ? (hdev)->name : "null") 282 283 #define bt_dev_info(hdev, fmt, ...) \ 284 BT_INFO("%s: " fmt, bt_dev_name(hdev), ##__VA_ARGS__) 285 #define bt_dev_warn(hdev, fmt, ...) \ 286 BT_WARN("%s: " fmt, bt_dev_name(hdev), ##__VA_ARGS__) 287 #define bt_dev_err(hdev, fmt, ...) \ 288 BT_ERR("%s: " fmt, bt_dev_name(hdev), ##__VA_ARGS__) 289 #define bt_dev_dbg(hdev, fmt, ...) \ 290 BT_DBG("%s: " fmt, bt_dev_name(hdev), ##__VA_ARGS__) 291 292 #define bt_dev_warn_ratelimited(hdev, fmt, ...) \ 293 bt_warn_ratelimited("%s: " fmt, bt_dev_name(hdev), ##__VA_ARGS__) 294 #define bt_dev_err_ratelimited(hdev, fmt, ...) \ 295 bt_err_ratelimited("%s: " fmt, bt_dev_name(hdev), ##__VA_ARGS__) 296 297 /* Connection and socket states */ 298 enum bt_sock_state { 299 BT_CONNECTED = 1, /* Equal to TCP_ESTABLISHED to make net code happy */ 300 BT_OPEN, 301 BT_BOUND, 302 BT_LISTEN, 303 BT_CONNECT, 304 BT_CONNECT2, 305 BT_CONFIG, 306 BT_DISCONN, 307 BT_CLOSED 308 }; 309 310 /* If unused will be removed by compiler */ 311 static inline const char *state_to_string(int state) 312 { 313 switch (state) { 314 case BT_CONNECTED: 315 return "BT_CONNECTED"; 316 case BT_OPEN: 317 return "BT_OPEN"; 318 case BT_BOUND: 319 return "BT_BOUND"; 320 case BT_LISTEN: 321 return "BT_LISTEN"; 322 case BT_CONNECT: 323 return "BT_CONNECT"; 324 case BT_CONNECT2: 325 return "BT_CONNECT2"; 326 case BT_CONFIG: 327 return "BT_CONFIG"; 328 case BT_DISCONN: 329 return "BT_DISCONN"; 330 case BT_CLOSED: 331 return "BT_CLOSED"; 332 } 333 334 return "invalid state"; 335 } 336 337 /* BD Address */ 338 typedef struct { 339 __u8 b[6]; 340 } __packed bdaddr_t; 341 342 /* BD Address type */ 343 #define BDADDR_BREDR 0x00 344 #define BDADDR_LE_PUBLIC 0x01 345 #define BDADDR_LE_RANDOM 0x02 346 347 static inline bool bdaddr_type_is_valid(u8 type) 348 { 349 switch (type) { 350 case BDADDR_BREDR: 351 case BDADDR_LE_PUBLIC: 352 case BDADDR_LE_RANDOM: 353 return true; 354 } 355 356 return false; 357 } 358 359 static inline bool bdaddr_type_is_le(u8 type) 360 { 361 switch (type) { 362 case BDADDR_LE_PUBLIC: 363 case BDADDR_LE_RANDOM: 364 return true; 365 } 366 367 return false; 368 } 369 370 #define BDADDR_ANY (&(bdaddr_t) {{0, 0, 0, 0, 0, 0}}) 371 #define BDADDR_NONE (&(bdaddr_t) {{0xff, 0xff, 0xff, 0xff, 0xff, 0xff}}) 372 373 /* Copy, swap, convert BD Address */ 374 static inline int bacmp(const bdaddr_t *ba1, const bdaddr_t *ba2) 375 { 376 return memcmp(ba1, ba2, sizeof(bdaddr_t)); 377 } 378 static inline void bacpy(bdaddr_t *dst, const bdaddr_t *src) 379 { 380 memcpy(dst, src, sizeof(bdaddr_t)); 381 } 382 383 void baswap(bdaddr_t *dst, const bdaddr_t *src); 384 385 /* Common socket structures and functions */ 386 387 #define bt_sk(__sk) ((struct bt_sock *) __sk) 388 389 struct bt_sock { 390 struct sock sk; 391 struct list_head accept_q; 392 struct sock *parent; 393 unsigned long flags; 394 void (*skb_msg_name)(struct sk_buff *, void *, int *); 395 void (*skb_put_cmsg)(struct sk_buff *, struct msghdr *, struct sock *); 396 }; 397 398 enum { 399 BT_SK_DEFER_SETUP, 400 BT_SK_SUSPEND, 401 BT_SK_PKT_STATUS, 402 BT_SK_PKT_SEQNUM, 403 }; 404 405 struct bt_sock_list { 406 struct hlist_head head; 407 rwlock_t lock; 408 #ifdef CONFIG_PROC_FS 409 int (* custom_seq_show)(struct seq_file *, void *); 410 #endif 411 }; 412 413 int bt_sock_register(int proto, const struct net_proto_family *ops); 414 void bt_sock_unregister(int proto); 415 void bt_sock_link(struct bt_sock_list *l, struct sock *s); 416 void bt_sock_unlink(struct bt_sock_list *l, struct sock *s); 417 bool bt_sock_linked(struct bt_sock_list *l, struct sock *s); 418 struct sock *bt_sock_alloc(struct net *net, struct socket *sock, 419 struct proto *prot, int proto, gfp_t prio, int kern); 420 int bt_sock_recvmsg(struct socket *sock, struct msghdr *msg, size_t len, 421 int flags); 422 int bt_sock_stream_recvmsg(struct socket *sock, struct msghdr *msg, 423 size_t len, int flags); 424 __poll_t bt_sock_poll(struct file *file, struct socket *sock, poll_table *wait); 425 int bt_sock_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg); 426 int bt_sock_wait_state(struct sock *sk, int state, unsigned long timeo); 427 int bt_sock_wait_ready(struct sock *sk, unsigned int msg_flags); 428 429 void bt_accept_enqueue(struct sock *parent, struct sock *sk, bool bh); 430 void bt_accept_unlink(struct sock *sk); 431 struct sock *bt_accept_dequeue(struct sock *parent, struct socket *newsock); 432 433 /* Skb helpers */ 434 struct l2cap_ctrl { 435 u8 sframe:1, 436 poll:1, 437 final:1, 438 fcs:1, 439 sar:2, 440 super:2; 441 442 u16 reqseq; 443 u16 txseq; 444 u8 retries; 445 __le16 psm; 446 bdaddr_t bdaddr; 447 struct l2cap_chan *chan; 448 }; 449 450 struct hci_dev; 451 452 typedef void (*hci_req_complete_t)(struct hci_dev *hdev, u8 status, u16 opcode); 453 typedef void (*hci_req_complete_skb_t)(struct hci_dev *hdev, u8 status, 454 u16 opcode, struct sk_buff *skb); 455 456 void hci_req_cmd_complete(struct hci_dev *hdev, u16 opcode, u8 status, 457 hci_req_complete_t *req_complete, 458 hci_req_complete_skb_t *req_complete_skb); 459 460 int hci_ethtool_ts_info(unsigned int index, int sk_proto, 461 struct kernel_ethtool_ts_info *ts_info); 462 463 #define HCI_REQ_START BIT(0) 464 #define HCI_REQ_SKB BIT(1) 465 466 struct hci_ctrl { 467 struct sock *sk; 468 u16 opcode; 469 u8 req_flags; 470 u8 req_event; 471 union { 472 hci_req_complete_t req_complete; 473 hci_req_complete_skb_t req_complete_skb; 474 }; 475 }; 476 477 struct mgmt_ctrl { 478 struct hci_dev *hdev; 479 u16 opcode; 480 }; 481 482 struct bt_skb_cb { 483 u8 pkt_type; 484 u8 force_active; 485 u16 expect; 486 u16 pkt_seqnum; 487 u8 incoming:1; 488 u8 pkt_status:2; 489 union { 490 struct l2cap_ctrl l2cap; 491 struct hci_ctrl hci; 492 struct mgmt_ctrl mgmt; 493 struct scm_creds creds; 494 }; 495 }; 496 #define bt_cb(skb) ((struct bt_skb_cb *)((skb)->cb)) 497 498 #define hci_skb_pkt_type(skb) bt_cb((skb))->pkt_type 499 #define hci_skb_pkt_status(skb) bt_cb((skb))->pkt_status 500 #define hci_skb_pkt_seqnum(skb) bt_cb((skb))->pkt_seqnum 501 #define hci_skb_expect(skb) bt_cb((skb))->expect 502 #define hci_skb_opcode(skb) bt_cb((skb))->hci.opcode 503 #define hci_skb_event(skb) bt_cb((skb))->hci.req_event 504 #define hci_skb_sk(skb) bt_cb((skb))->hci.sk 505 506 static inline struct sk_buff *bt_skb_alloc(unsigned int len, gfp_t how) 507 { 508 struct sk_buff *skb; 509 510 skb = alloc_skb(len + BT_SKB_RESERVE, how); 511 if (skb) 512 skb_reserve(skb, BT_SKB_RESERVE); 513 return skb; 514 } 515 516 static inline struct sk_buff *bt_skb_send_alloc(struct sock *sk, 517 unsigned long len, int nb, int *err) 518 { 519 struct sk_buff *skb; 520 521 skb = sock_alloc_send_skb(sk, len + BT_SKB_RESERVE, nb, err); 522 if (skb) 523 skb_reserve(skb, BT_SKB_RESERVE); 524 525 if (!skb && *err) 526 return NULL; 527 528 *err = sock_error(sk); 529 if (*err) 530 goto out; 531 532 if (sk->sk_shutdown) { 533 *err = -ECONNRESET; 534 goto out; 535 } 536 537 return skb; 538 539 out: 540 kfree_skb(skb); 541 return NULL; 542 } 543 544 /* Shall not be called with lock_sock held */ 545 static inline struct sk_buff *bt_skb_sendmsg(struct sock *sk, 546 struct msghdr *msg, 547 size_t len, size_t mtu, 548 size_t headroom, size_t tailroom) 549 { 550 struct sk_buff *skb; 551 size_t size = min_t(size_t, len, mtu); 552 int err; 553 554 skb = bt_skb_send_alloc(sk, size + headroom + tailroom, 555 msg->msg_flags & MSG_DONTWAIT, &err); 556 if (!skb) 557 return ERR_PTR(err); 558 559 skb_reserve(skb, headroom); 560 skb_tailroom_reserve(skb, mtu, tailroom); 561 562 if (!copy_from_iter_full(skb_put(skb, size), size, &msg->msg_iter)) { 563 kfree_skb(skb); 564 return ERR_PTR(-EFAULT); 565 } 566 567 skb->priority = READ_ONCE(sk->sk_priority); 568 569 return skb; 570 } 571 572 /* Similar to bt_skb_sendmsg but can split the msg into multiple fragments 573 * accourding to the MTU. 574 */ 575 static inline struct sk_buff *bt_skb_sendmmsg(struct sock *sk, 576 struct msghdr *msg, 577 size_t len, size_t mtu, 578 size_t headroom, size_t tailroom) 579 { 580 struct sk_buff *skb, **frag; 581 582 skb = bt_skb_sendmsg(sk, msg, len, mtu, headroom, tailroom); 583 if (IS_ERR(skb)) 584 return skb; 585 586 len -= skb->len; 587 if (!len) 588 return skb; 589 590 /* Add remaining data over MTU as continuation fragments */ 591 frag = &skb_shinfo(skb)->frag_list; 592 while (len) { 593 struct sk_buff *tmp; 594 595 tmp = bt_skb_sendmsg(sk, msg, len, mtu, headroom, tailroom); 596 if (IS_ERR(tmp)) { 597 return skb; 598 } 599 600 len -= tmp->len; 601 602 *frag = tmp; 603 frag = &(*frag)->next; 604 } 605 606 return skb; 607 } 608 609 int bt_to_errno(u16 code); 610 __u8 bt_status(int err); 611 612 void hci_sock_set_flag(struct sock *sk, int nr); 613 void hci_sock_clear_flag(struct sock *sk, int nr); 614 int hci_sock_test_flag(struct sock *sk, int nr); 615 unsigned short hci_sock_get_channel(struct sock *sk); 616 u32 hci_sock_get_cookie(struct sock *sk); 617 618 int hci_sock_init(void); 619 void hci_sock_cleanup(void); 620 621 int bt_sysfs_init(void); 622 void bt_sysfs_cleanup(void); 623 624 int bt_procfs_init(struct net *net, const char *name, 625 struct bt_sock_list *sk_list, 626 int (*seq_show)(struct seq_file *, void *)); 627 void bt_procfs_cleanup(struct net *net, const char *name); 628 629 extern struct dentry *bt_debugfs; 630 631 int l2cap_init(void); 632 void l2cap_exit(void); 633 634 #if IS_ENABLED(CONFIG_BT_BREDR) 635 int sco_init(void); 636 void sco_exit(void); 637 #else 638 static inline int sco_init(void) 639 { 640 return 0; 641 } 642 643 static inline void sco_exit(void) 644 { 645 } 646 #endif 647 648 #if IS_ENABLED(CONFIG_BT_LE) 649 int iso_init(void); 650 int iso_exit(void); 651 bool iso_inited(void); 652 #else 653 static inline int iso_init(void) 654 { 655 return 0; 656 } 657 658 static inline int iso_exit(void) 659 { 660 return 0; 661 } 662 663 static inline bool iso_inited(void) 664 { 665 return false; 666 } 667 #endif 668 669 int mgmt_init(void); 670 void mgmt_exit(void); 671 void mgmt_cleanup(struct sock *sk); 672 673 void bt_sock_reclassify_lock(struct sock *sk, int proto); 674 675 #endif /* __BLUETOOTH_H */ 676