1 /* 2 BlueZ - Bluetooth protocol stack for Linux 3 Copyright (c) 2000-2001, 2010, Code Aurora Forum. All rights reserved. 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 __HCI_CORE_H 26 #define __HCI_CORE_H 27 28 #include <linux/leds.h> 29 #include <linux/rculist.h> 30 31 #include <net/bluetooth/hci.h> 32 #include <net/bluetooth/hci_sock.h> 33 34 /* HCI priority */ 35 #define HCI_PRIO_MAX 7 36 37 /* HCI Core structures */ 38 struct inquiry_data { 39 bdaddr_t bdaddr; 40 __u8 pscan_rep_mode; 41 __u8 pscan_period_mode; 42 __u8 pscan_mode; 43 __u8 dev_class[3]; 44 __le16 clock_offset; 45 __s8 rssi; 46 __u8 ssp_mode; 47 }; 48 49 struct inquiry_entry { 50 struct list_head all; /* inq_cache.all */ 51 struct list_head list; /* unknown or resolve */ 52 enum { 53 NAME_NOT_KNOWN, 54 NAME_NEEDED, 55 NAME_PENDING, 56 NAME_KNOWN, 57 } name_state; 58 __u32 timestamp; 59 struct inquiry_data data; 60 }; 61 62 struct discovery_state { 63 int type; 64 enum { 65 DISCOVERY_STOPPED, 66 DISCOVERY_STARTING, 67 DISCOVERY_FINDING, 68 DISCOVERY_RESOLVING, 69 DISCOVERY_STOPPING, 70 } state; 71 struct list_head all; /* All devices found during inquiry */ 72 struct list_head unknown; /* Name state not known */ 73 struct list_head resolve; /* Name needs to be resolved */ 74 __u32 timestamp; 75 bdaddr_t last_adv_addr; 76 u8 last_adv_addr_type; 77 s8 last_adv_rssi; 78 u32 last_adv_flags; 79 u8 last_adv_data[HCI_MAX_AD_LENGTH]; 80 u8 last_adv_data_len; 81 bool report_invalid_rssi; 82 bool result_filtering; 83 bool limited; 84 s8 rssi; 85 u16 uuid_count; 86 u8 (*uuids)[16]; 87 unsigned long scan_start; 88 unsigned long scan_duration; 89 }; 90 91 #define SUSPEND_NOTIFIER_TIMEOUT msecs_to_jiffies(2000) /* 2 seconds */ 92 93 enum suspend_tasks { 94 SUSPEND_PAUSE_DISCOVERY, 95 SUSPEND_UNPAUSE_DISCOVERY, 96 97 SUSPEND_PAUSE_ADVERTISING, 98 SUSPEND_UNPAUSE_ADVERTISING, 99 100 SUSPEND_SCAN_DISABLE, 101 SUSPEND_SCAN_ENABLE, 102 SUSPEND_DISCONNECTING, 103 104 SUSPEND_POWERING_DOWN, 105 106 SUSPEND_PREPARE_NOTIFIER, 107 __SUSPEND_NUM_TASKS 108 }; 109 110 enum suspended_state { 111 BT_RUNNING = 0, 112 BT_SUSPEND_DISCONNECT, 113 BT_SUSPEND_COMPLETE, 114 }; 115 116 struct hci_conn_hash { 117 struct list_head list; 118 unsigned int acl_num; 119 unsigned int amp_num; 120 unsigned int sco_num; 121 unsigned int le_num; 122 unsigned int le_num_slave; 123 }; 124 125 struct bdaddr_list { 126 struct list_head list; 127 bdaddr_t bdaddr; 128 u8 bdaddr_type; 129 }; 130 131 struct bdaddr_list_with_irk { 132 struct list_head list; 133 bdaddr_t bdaddr; 134 u8 bdaddr_type; 135 u8 peer_irk[16]; 136 u8 local_irk[16]; 137 }; 138 139 struct bt_uuid { 140 struct list_head list; 141 u8 uuid[16]; 142 u8 size; 143 u8 svc_hint; 144 }; 145 146 struct blocked_key { 147 struct list_head list; 148 struct rcu_head rcu; 149 u8 type; 150 u8 val[16]; 151 }; 152 153 struct smp_csrk { 154 bdaddr_t bdaddr; 155 u8 bdaddr_type; 156 u8 type; 157 u8 val[16]; 158 }; 159 160 struct smp_ltk { 161 struct list_head list; 162 struct rcu_head rcu; 163 bdaddr_t bdaddr; 164 u8 bdaddr_type; 165 u8 authenticated; 166 u8 type; 167 u8 enc_size; 168 __le16 ediv; 169 __le64 rand; 170 u8 val[16]; 171 }; 172 173 struct smp_irk { 174 struct list_head list; 175 struct rcu_head rcu; 176 bdaddr_t rpa; 177 bdaddr_t bdaddr; 178 u8 addr_type; 179 u8 val[16]; 180 }; 181 182 struct link_key { 183 struct list_head list; 184 struct rcu_head rcu; 185 bdaddr_t bdaddr; 186 u8 type; 187 u8 val[HCI_LINK_KEY_SIZE]; 188 u8 pin_len; 189 }; 190 191 struct oob_data { 192 struct list_head list; 193 bdaddr_t bdaddr; 194 u8 bdaddr_type; 195 u8 present; 196 u8 hash192[16]; 197 u8 rand192[16]; 198 u8 hash256[16]; 199 u8 rand256[16]; 200 }; 201 202 struct adv_info { 203 struct list_head list; 204 bool pending; 205 __u8 instance; 206 __u32 flags; 207 __u16 timeout; 208 __u16 remaining_time; 209 __u16 duration; 210 __u16 adv_data_len; 211 __u8 adv_data[HCI_MAX_AD_LENGTH]; 212 __u16 scan_rsp_len; 213 __u8 scan_rsp_data[HCI_MAX_AD_LENGTH]; 214 __s8 tx_power; 215 bdaddr_t random_addr; 216 bool rpa_expired; 217 struct delayed_work rpa_expired_cb; 218 }; 219 220 #define HCI_MAX_ADV_INSTANCES 5 221 #define HCI_DEFAULT_ADV_DURATION 2 222 223 #define HCI_MAX_SHORT_NAME_LENGTH 10 224 225 /* Min encryption key size to match with SMP */ 226 #define HCI_MIN_ENC_KEY_SIZE 7 227 228 /* Default LE RPA expiry time, 15 minutes */ 229 #define HCI_DEFAULT_RPA_TIMEOUT (15 * 60) 230 231 /* Default min/max age of connection information (1s/3s) */ 232 #define DEFAULT_CONN_INFO_MIN_AGE 1000 233 #define DEFAULT_CONN_INFO_MAX_AGE 3000 234 /* Default authenticated payload timeout 30s */ 235 #define DEFAULT_AUTH_PAYLOAD_TIMEOUT 0x0bb8 236 237 struct amp_assoc { 238 __u16 len; 239 __u16 offset; 240 __u16 rem_len; 241 __u16 len_so_far; 242 __u8 data[HCI_MAX_AMP_ASSOC_SIZE]; 243 }; 244 245 #define HCI_MAX_PAGES 3 246 247 struct hci_dev { 248 struct list_head list; 249 struct mutex lock; 250 251 char name[8]; 252 unsigned long flags; 253 __u16 id; 254 __u8 bus; 255 __u8 dev_type; 256 bdaddr_t bdaddr; 257 bdaddr_t setup_addr; 258 bdaddr_t public_addr; 259 bdaddr_t random_addr; 260 bdaddr_t static_addr; 261 __u8 adv_addr_type; 262 __u8 dev_name[HCI_MAX_NAME_LENGTH]; 263 __u8 short_name[HCI_MAX_SHORT_NAME_LENGTH]; 264 __u8 eir[HCI_MAX_EIR_LENGTH]; 265 __u16 appearance; 266 __u8 dev_class[3]; 267 __u8 major_class; 268 __u8 minor_class; 269 __u8 max_page; 270 __u8 features[HCI_MAX_PAGES][8]; 271 __u8 le_features[8]; 272 __u8 le_white_list_size; 273 __u8 le_resolv_list_size; 274 __u8 le_num_of_adv_sets; 275 __u8 le_states[8]; 276 __u8 commands[64]; 277 __u8 hci_ver; 278 __u16 hci_rev; 279 __u8 lmp_ver; 280 __u16 manufacturer; 281 __u16 lmp_subver; 282 __u16 voice_setting; 283 __u8 num_iac; 284 __u8 stored_max_keys; 285 __u8 stored_num_keys; 286 __u8 io_capability; 287 __s8 inq_tx_power; 288 __u8 err_data_reporting; 289 __u16 page_scan_interval; 290 __u16 page_scan_window; 291 __u8 page_scan_type; 292 __u8 le_adv_channel_map; 293 __u16 le_adv_min_interval; 294 __u16 le_adv_max_interval; 295 __u8 le_scan_type; 296 __u16 le_scan_interval; 297 __u16 le_scan_window; 298 __u16 le_conn_min_interval; 299 __u16 le_conn_max_interval; 300 __u16 le_conn_latency; 301 __u16 le_supv_timeout; 302 __u16 le_def_tx_len; 303 __u16 le_def_tx_time; 304 __u16 le_max_tx_len; 305 __u16 le_max_tx_time; 306 __u16 le_max_rx_len; 307 __u16 le_max_rx_time; 308 __u8 le_max_key_size; 309 __u8 le_min_key_size; 310 __u16 discov_interleaved_timeout; 311 __u16 conn_info_min_age; 312 __u16 conn_info_max_age; 313 __u16 auth_payload_timeout; 314 __u8 min_enc_key_size; 315 __u8 max_enc_key_size; 316 __u8 pairing_opts; 317 __u8 ssp_debug_mode; 318 __u8 hw_error_code; 319 __u32 clock; 320 321 __u16 devid_source; 322 __u16 devid_vendor; 323 __u16 devid_product; 324 __u16 devid_version; 325 326 __u16 pkt_type; 327 __u16 esco_type; 328 __u16 link_policy; 329 __u16 link_mode; 330 331 __u32 idle_timeout; 332 __u16 sniff_min_interval; 333 __u16 sniff_max_interval; 334 335 __u8 amp_status; 336 __u32 amp_total_bw; 337 __u32 amp_max_bw; 338 __u32 amp_min_latency; 339 __u32 amp_max_pdu; 340 __u8 amp_type; 341 __u16 amp_pal_cap; 342 __u16 amp_assoc_size; 343 __u32 amp_max_flush_to; 344 __u32 amp_be_flush_to; 345 346 struct amp_assoc loc_assoc; 347 348 __u8 flow_ctl_mode; 349 350 unsigned int auto_accept_delay; 351 352 unsigned long quirks; 353 354 atomic_t cmd_cnt; 355 unsigned int acl_cnt; 356 unsigned int sco_cnt; 357 unsigned int le_cnt; 358 359 unsigned int acl_mtu; 360 unsigned int sco_mtu; 361 unsigned int le_mtu; 362 unsigned int acl_pkts; 363 unsigned int sco_pkts; 364 unsigned int le_pkts; 365 366 __u16 block_len; 367 __u16 block_mtu; 368 __u16 num_blocks; 369 __u16 block_cnt; 370 371 unsigned long acl_last_tx; 372 unsigned long sco_last_tx; 373 unsigned long le_last_tx; 374 375 __u8 le_tx_def_phys; 376 __u8 le_rx_def_phys; 377 378 struct workqueue_struct *workqueue; 379 struct workqueue_struct *req_workqueue; 380 381 struct work_struct power_on; 382 struct delayed_work power_off; 383 struct work_struct error_reset; 384 385 __u16 discov_timeout; 386 struct delayed_work discov_off; 387 388 struct delayed_work service_cache; 389 390 struct delayed_work cmd_timer; 391 392 struct work_struct rx_work; 393 struct work_struct cmd_work; 394 struct work_struct tx_work; 395 396 struct work_struct discov_update; 397 struct work_struct bg_scan_update; 398 struct work_struct scan_update; 399 struct work_struct connectable_update; 400 struct work_struct discoverable_update; 401 struct delayed_work le_scan_disable; 402 struct delayed_work le_scan_restart; 403 404 struct sk_buff_head rx_q; 405 struct sk_buff_head raw_q; 406 struct sk_buff_head cmd_q; 407 408 struct sk_buff *sent_cmd; 409 410 struct mutex req_lock; 411 wait_queue_head_t req_wait_q; 412 __u32 req_status; 413 __u32 req_result; 414 struct sk_buff *req_skb; 415 416 void *smp_data; 417 void *smp_bredr_data; 418 419 struct discovery_state discovery; 420 421 int discovery_old_state; 422 bool discovery_paused; 423 int advertising_old_state; 424 bool advertising_paused; 425 426 struct notifier_block suspend_notifier; 427 struct work_struct suspend_prepare; 428 enum suspended_state suspend_state_next; 429 enum suspended_state suspend_state; 430 bool scanning_paused; 431 bool suspended; 432 433 wait_queue_head_t suspend_wait_q; 434 DECLARE_BITMAP(suspend_tasks, __SUSPEND_NUM_TASKS); 435 436 struct hci_conn_hash conn_hash; 437 438 struct list_head mgmt_pending; 439 struct list_head blacklist; 440 struct list_head whitelist; 441 struct list_head wakeable; 442 struct list_head uuids; 443 struct list_head link_keys; 444 struct list_head long_term_keys; 445 struct list_head identity_resolving_keys; 446 struct list_head remote_oob_data; 447 struct list_head le_white_list; 448 struct list_head le_resolv_list; 449 struct list_head le_conn_params; 450 struct list_head pend_le_conns; 451 struct list_head pend_le_reports; 452 struct list_head blocked_keys; 453 454 struct hci_dev_stats stat; 455 456 atomic_t promisc; 457 458 const char *hw_info; 459 const char *fw_info; 460 struct dentry *debugfs; 461 462 struct device dev; 463 464 struct rfkill *rfkill; 465 466 DECLARE_BITMAP(dev_flags, __HCI_NUM_FLAGS); 467 468 __s8 adv_tx_power; 469 __u8 adv_data[HCI_MAX_AD_LENGTH]; 470 __u8 adv_data_len; 471 __u8 scan_rsp_data[HCI_MAX_AD_LENGTH]; 472 __u8 scan_rsp_data_len; 473 474 struct list_head adv_instances; 475 unsigned int adv_instance_cnt; 476 __u8 cur_adv_instance; 477 __u16 adv_instance_timeout; 478 struct delayed_work adv_instance_expire; 479 480 __u8 irk[16]; 481 __u32 rpa_timeout; 482 struct delayed_work rpa_expired; 483 bdaddr_t rpa; 484 485 #if IS_ENABLED(CONFIG_BT_LEDS) 486 struct led_trigger *power_led; 487 #endif 488 489 #if IS_ENABLED(CONFIG_BT_MSFTEXT) 490 __u16 msft_opcode; 491 void *msft_data; 492 #endif 493 494 int (*open)(struct hci_dev *hdev); 495 int (*close)(struct hci_dev *hdev); 496 int (*flush)(struct hci_dev *hdev); 497 int (*setup)(struct hci_dev *hdev); 498 int (*shutdown)(struct hci_dev *hdev); 499 int (*send)(struct hci_dev *hdev, struct sk_buff *skb); 500 void (*notify)(struct hci_dev *hdev, unsigned int evt); 501 void (*hw_error)(struct hci_dev *hdev, u8 code); 502 int (*post_init)(struct hci_dev *hdev); 503 int (*set_diag)(struct hci_dev *hdev, bool enable); 504 int (*set_bdaddr)(struct hci_dev *hdev, const bdaddr_t *bdaddr); 505 void (*cmd_timeout)(struct hci_dev *hdev); 506 }; 507 508 #define HCI_PHY_HANDLE(handle) (handle & 0xff) 509 510 struct hci_conn { 511 struct list_head list; 512 513 atomic_t refcnt; 514 515 bdaddr_t dst; 516 __u8 dst_type; 517 bdaddr_t src; 518 __u8 src_type; 519 bdaddr_t init_addr; 520 __u8 init_addr_type; 521 bdaddr_t resp_addr; 522 __u8 resp_addr_type; 523 __u16 handle; 524 __u16 state; 525 __u8 mode; 526 __u8 type; 527 __u8 role; 528 bool out; 529 __u8 attempt; 530 __u8 dev_class[3]; 531 __u8 features[HCI_MAX_PAGES][8]; 532 __u16 pkt_type; 533 __u16 link_policy; 534 __u8 key_type; 535 __u8 auth_type; 536 __u8 sec_level; 537 __u8 pending_sec_level; 538 __u8 pin_length; 539 __u8 enc_key_size; 540 __u8 io_capability; 541 __u32 passkey_notify; 542 __u8 passkey_entered; 543 __u16 disc_timeout; 544 __u16 conn_timeout; 545 __u16 setting; 546 __u16 auth_payload_timeout; 547 __u16 le_conn_min_interval; 548 __u16 le_conn_max_interval; 549 __u16 le_conn_interval; 550 __u16 le_conn_latency; 551 __u16 le_supv_timeout; 552 __u8 le_adv_data[HCI_MAX_AD_LENGTH]; 553 __u8 le_adv_data_len; 554 __u8 le_tx_phy; 555 __u8 le_rx_phy; 556 __s8 rssi; 557 __s8 tx_power; 558 __s8 max_tx_power; 559 unsigned long flags; 560 561 __u32 clock; 562 __u16 clock_accuracy; 563 564 unsigned long conn_info_timestamp; 565 566 __u8 remote_cap; 567 __u8 remote_auth; 568 __u8 remote_id; 569 570 unsigned int sent; 571 572 struct sk_buff_head data_q; 573 struct list_head chan_list; 574 575 struct delayed_work disc_work; 576 struct delayed_work auto_accept_work; 577 struct delayed_work idle_work; 578 struct delayed_work le_conn_timeout; 579 struct work_struct le_scan_cleanup; 580 581 struct device dev; 582 struct dentry *debugfs; 583 584 struct hci_dev *hdev; 585 void *l2cap_data; 586 void *sco_data; 587 struct amp_mgr *amp_mgr; 588 589 struct hci_conn *link; 590 591 void (*connect_cfm_cb) (struct hci_conn *conn, u8 status); 592 void (*security_cfm_cb) (struct hci_conn *conn, u8 status); 593 void (*disconn_cfm_cb) (struct hci_conn *conn, u8 reason); 594 }; 595 596 struct hci_chan { 597 struct list_head list; 598 __u16 handle; 599 struct hci_conn *conn; 600 struct sk_buff_head data_q; 601 unsigned int sent; 602 __u8 state; 603 }; 604 605 struct hci_conn_params { 606 struct list_head list; 607 struct list_head action; 608 609 bdaddr_t addr; 610 u8 addr_type; 611 612 u16 conn_min_interval; 613 u16 conn_max_interval; 614 u16 conn_latency; 615 u16 supervision_timeout; 616 617 enum { 618 HCI_AUTO_CONN_DISABLED, 619 HCI_AUTO_CONN_REPORT, 620 HCI_AUTO_CONN_DIRECT, 621 HCI_AUTO_CONN_ALWAYS, 622 HCI_AUTO_CONN_LINK_LOSS, 623 HCI_AUTO_CONN_EXPLICIT, 624 } auto_connect; 625 626 struct hci_conn *conn; 627 bool explicit_connect; 628 bool wakeable; 629 }; 630 631 extern struct list_head hci_dev_list; 632 extern struct list_head hci_cb_list; 633 extern rwlock_t hci_dev_list_lock; 634 extern struct mutex hci_cb_list_lock; 635 636 #define hci_dev_set_flag(hdev, nr) set_bit((nr), (hdev)->dev_flags) 637 #define hci_dev_clear_flag(hdev, nr) clear_bit((nr), (hdev)->dev_flags) 638 #define hci_dev_change_flag(hdev, nr) change_bit((nr), (hdev)->dev_flags) 639 #define hci_dev_test_flag(hdev, nr) test_bit((nr), (hdev)->dev_flags) 640 #define hci_dev_test_and_set_flag(hdev, nr) test_and_set_bit((nr), (hdev)->dev_flags) 641 #define hci_dev_test_and_clear_flag(hdev, nr) test_and_clear_bit((nr), (hdev)->dev_flags) 642 #define hci_dev_test_and_change_flag(hdev, nr) test_and_change_bit((nr), (hdev)->dev_flags) 643 644 #define hci_dev_clear_volatile_flags(hdev) \ 645 do { \ 646 hci_dev_clear_flag(hdev, HCI_LE_SCAN); \ 647 hci_dev_clear_flag(hdev, HCI_LE_ADV); \ 648 hci_dev_clear_flag(hdev, HCI_LL_RPA_RESOLUTION);\ 649 hci_dev_clear_flag(hdev, HCI_PERIODIC_INQ); \ 650 } while (0) 651 652 /* ----- HCI interface to upper protocols ----- */ 653 int l2cap_connect_ind(struct hci_dev *hdev, bdaddr_t *bdaddr); 654 int l2cap_disconn_ind(struct hci_conn *hcon); 655 void l2cap_recv_acldata(struct hci_conn *hcon, struct sk_buff *skb, u16 flags); 656 657 #if IS_ENABLED(CONFIG_BT_BREDR) 658 int sco_connect_ind(struct hci_dev *hdev, bdaddr_t *bdaddr, __u8 *flags); 659 void sco_recv_scodata(struct hci_conn *hcon, struct sk_buff *skb); 660 #else 661 static inline int sco_connect_ind(struct hci_dev *hdev, bdaddr_t *bdaddr, 662 __u8 *flags) 663 { 664 return 0; 665 } 666 667 static inline void sco_recv_scodata(struct hci_conn *hcon, struct sk_buff *skb) 668 { 669 } 670 #endif 671 672 /* ----- Inquiry cache ----- */ 673 #define INQUIRY_CACHE_AGE_MAX (HZ*30) /* 30 seconds */ 674 #define INQUIRY_ENTRY_AGE_MAX (HZ*60) /* 60 seconds */ 675 676 static inline void discovery_init(struct hci_dev *hdev) 677 { 678 hdev->discovery.state = DISCOVERY_STOPPED; 679 INIT_LIST_HEAD(&hdev->discovery.all); 680 INIT_LIST_HEAD(&hdev->discovery.unknown); 681 INIT_LIST_HEAD(&hdev->discovery.resolve); 682 hdev->discovery.report_invalid_rssi = true; 683 hdev->discovery.rssi = HCI_RSSI_INVALID; 684 } 685 686 static inline void hci_discovery_filter_clear(struct hci_dev *hdev) 687 { 688 hdev->discovery.result_filtering = false; 689 hdev->discovery.report_invalid_rssi = true; 690 hdev->discovery.rssi = HCI_RSSI_INVALID; 691 hdev->discovery.uuid_count = 0; 692 kfree(hdev->discovery.uuids); 693 hdev->discovery.uuids = NULL; 694 hdev->discovery.scan_start = 0; 695 hdev->discovery.scan_duration = 0; 696 } 697 698 bool hci_discovery_active(struct hci_dev *hdev); 699 700 void hci_discovery_set_state(struct hci_dev *hdev, int state); 701 702 static inline int inquiry_cache_empty(struct hci_dev *hdev) 703 { 704 return list_empty(&hdev->discovery.all); 705 } 706 707 static inline long inquiry_cache_age(struct hci_dev *hdev) 708 { 709 struct discovery_state *c = &hdev->discovery; 710 return jiffies - c->timestamp; 711 } 712 713 static inline long inquiry_entry_age(struct inquiry_entry *e) 714 { 715 return jiffies - e->timestamp; 716 } 717 718 struct inquiry_entry *hci_inquiry_cache_lookup(struct hci_dev *hdev, 719 bdaddr_t *bdaddr); 720 struct inquiry_entry *hci_inquiry_cache_lookup_unknown(struct hci_dev *hdev, 721 bdaddr_t *bdaddr); 722 struct inquiry_entry *hci_inquiry_cache_lookup_resolve(struct hci_dev *hdev, 723 bdaddr_t *bdaddr, 724 int state); 725 void hci_inquiry_cache_update_resolve(struct hci_dev *hdev, 726 struct inquiry_entry *ie); 727 u32 hci_inquiry_cache_update(struct hci_dev *hdev, struct inquiry_data *data, 728 bool name_known); 729 void hci_inquiry_cache_flush(struct hci_dev *hdev); 730 731 /* ----- HCI Connections ----- */ 732 enum { 733 HCI_CONN_AUTH_PEND, 734 HCI_CONN_REAUTH_PEND, 735 HCI_CONN_ENCRYPT_PEND, 736 HCI_CONN_RSWITCH_PEND, 737 HCI_CONN_MODE_CHANGE_PEND, 738 HCI_CONN_SCO_SETUP_PEND, 739 HCI_CONN_MGMT_CONNECTED, 740 HCI_CONN_SSP_ENABLED, 741 HCI_CONN_SC_ENABLED, 742 HCI_CONN_AES_CCM, 743 HCI_CONN_POWER_SAVE, 744 HCI_CONN_FLUSH_KEY, 745 HCI_CONN_ENCRYPT, 746 HCI_CONN_AUTH, 747 HCI_CONN_SECURE, 748 HCI_CONN_FIPS, 749 HCI_CONN_STK_ENCRYPT, 750 HCI_CONN_AUTH_INITIATOR, 751 HCI_CONN_DROP, 752 HCI_CONN_PARAM_REMOVAL_PEND, 753 HCI_CONN_NEW_LINK_KEY, 754 HCI_CONN_SCANNING, 755 HCI_CONN_AUTH_FAILURE, 756 }; 757 758 static inline bool hci_conn_ssp_enabled(struct hci_conn *conn) 759 { 760 struct hci_dev *hdev = conn->hdev; 761 return hci_dev_test_flag(hdev, HCI_SSP_ENABLED) && 762 test_bit(HCI_CONN_SSP_ENABLED, &conn->flags); 763 } 764 765 static inline bool hci_conn_sc_enabled(struct hci_conn *conn) 766 { 767 struct hci_dev *hdev = conn->hdev; 768 return hci_dev_test_flag(hdev, HCI_SC_ENABLED) && 769 test_bit(HCI_CONN_SC_ENABLED, &conn->flags); 770 } 771 772 static inline void hci_conn_hash_add(struct hci_dev *hdev, struct hci_conn *c) 773 { 774 struct hci_conn_hash *h = &hdev->conn_hash; 775 list_add_rcu(&c->list, &h->list); 776 switch (c->type) { 777 case ACL_LINK: 778 h->acl_num++; 779 break; 780 case AMP_LINK: 781 h->amp_num++; 782 break; 783 case LE_LINK: 784 h->le_num++; 785 if (c->role == HCI_ROLE_SLAVE) 786 h->le_num_slave++; 787 break; 788 case SCO_LINK: 789 case ESCO_LINK: 790 h->sco_num++; 791 break; 792 } 793 } 794 795 static inline void hci_conn_hash_del(struct hci_dev *hdev, struct hci_conn *c) 796 { 797 struct hci_conn_hash *h = &hdev->conn_hash; 798 799 list_del_rcu(&c->list); 800 synchronize_rcu(); 801 802 switch (c->type) { 803 case ACL_LINK: 804 h->acl_num--; 805 break; 806 case AMP_LINK: 807 h->amp_num--; 808 break; 809 case LE_LINK: 810 h->le_num--; 811 if (c->role == HCI_ROLE_SLAVE) 812 h->le_num_slave--; 813 break; 814 case SCO_LINK: 815 case ESCO_LINK: 816 h->sco_num--; 817 break; 818 } 819 } 820 821 static inline unsigned int hci_conn_num(struct hci_dev *hdev, __u8 type) 822 { 823 struct hci_conn_hash *h = &hdev->conn_hash; 824 switch (type) { 825 case ACL_LINK: 826 return h->acl_num; 827 case AMP_LINK: 828 return h->amp_num; 829 case LE_LINK: 830 return h->le_num; 831 case SCO_LINK: 832 case ESCO_LINK: 833 return h->sco_num; 834 default: 835 return 0; 836 } 837 } 838 839 static inline unsigned int hci_conn_count(struct hci_dev *hdev) 840 { 841 struct hci_conn_hash *c = &hdev->conn_hash; 842 843 return c->acl_num + c->amp_num + c->sco_num + c->le_num; 844 } 845 846 static inline __u8 hci_conn_lookup_type(struct hci_dev *hdev, __u16 handle) 847 { 848 struct hci_conn_hash *h = &hdev->conn_hash; 849 struct hci_conn *c; 850 __u8 type = INVALID_LINK; 851 852 rcu_read_lock(); 853 854 list_for_each_entry_rcu(c, &h->list, list) { 855 if (c->handle == handle) { 856 type = c->type; 857 break; 858 } 859 } 860 861 rcu_read_unlock(); 862 863 return type; 864 } 865 866 static inline struct hci_conn *hci_conn_hash_lookup_handle(struct hci_dev *hdev, 867 __u16 handle) 868 { 869 struct hci_conn_hash *h = &hdev->conn_hash; 870 struct hci_conn *c; 871 872 rcu_read_lock(); 873 874 list_for_each_entry_rcu(c, &h->list, list) { 875 if (c->handle == handle) { 876 rcu_read_unlock(); 877 return c; 878 } 879 } 880 rcu_read_unlock(); 881 882 return NULL; 883 } 884 885 static inline struct hci_conn *hci_conn_hash_lookup_ba(struct hci_dev *hdev, 886 __u8 type, bdaddr_t *ba) 887 { 888 struct hci_conn_hash *h = &hdev->conn_hash; 889 struct hci_conn *c; 890 891 rcu_read_lock(); 892 893 list_for_each_entry_rcu(c, &h->list, list) { 894 if (c->type == type && !bacmp(&c->dst, ba)) { 895 rcu_read_unlock(); 896 return c; 897 } 898 } 899 900 rcu_read_unlock(); 901 902 return NULL; 903 } 904 905 static inline struct hci_conn *hci_conn_hash_lookup_le(struct hci_dev *hdev, 906 bdaddr_t *ba, 907 __u8 ba_type) 908 { 909 struct hci_conn_hash *h = &hdev->conn_hash; 910 struct hci_conn *c; 911 912 rcu_read_lock(); 913 914 list_for_each_entry_rcu(c, &h->list, list) { 915 if (c->type != LE_LINK) 916 continue; 917 918 if (ba_type == c->dst_type && !bacmp(&c->dst, ba)) { 919 rcu_read_unlock(); 920 return c; 921 } 922 } 923 924 rcu_read_unlock(); 925 926 return NULL; 927 } 928 929 static inline struct hci_conn *hci_conn_hash_lookup_state(struct hci_dev *hdev, 930 __u8 type, __u16 state) 931 { 932 struct hci_conn_hash *h = &hdev->conn_hash; 933 struct hci_conn *c; 934 935 rcu_read_lock(); 936 937 list_for_each_entry_rcu(c, &h->list, list) { 938 if (c->type == type && c->state == state) { 939 rcu_read_unlock(); 940 return c; 941 } 942 } 943 944 rcu_read_unlock(); 945 946 return NULL; 947 } 948 949 static inline struct hci_conn *hci_lookup_le_connect(struct hci_dev *hdev) 950 { 951 struct hci_conn_hash *h = &hdev->conn_hash; 952 struct hci_conn *c; 953 954 rcu_read_lock(); 955 956 list_for_each_entry_rcu(c, &h->list, list) { 957 if (c->type == LE_LINK && c->state == BT_CONNECT && 958 !test_bit(HCI_CONN_SCANNING, &c->flags)) { 959 rcu_read_unlock(); 960 return c; 961 } 962 } 963 964 rcu_read_unlock(); 965 966 return NULL; 967 } 968 969 int hci_disconnect(struct hci_conn *conn, __u8 reason); 970 bool hci_setup_sync(struct hci_conn *conn, __u16 handle); 971 void hci_sco_setup(struct hci_conn *conn, __u8 status); 972 973 struct hci_conn *hci_conn_add(struct hci_dev *hdev, int type, bdaddr_t *dst, 974 u8 role); 975 int hci_conn_del(struct hci_conn *conn); 976 void hci_conn_hash_flush(struct hci_dev *hdev); 977 void hci_conn_check_pending(struct hci_dev *hdev); 978 979 struct hci_chan *hci_chan_create(struct hci_conn *conn); 980 void hci_chan_del(struct hci_chan *chan); 981 void hci_chan_list_flush(struct hci_conn *conn); 982 struct hci_chan *hci_chan_lookup_handle(struct hci_dev *hdev, __u16 handle); 983 984 struct hci_conn *hci_connect_le_scan(struct hci_dev *hdev, bdaddr_t *dst, 985 u8 dst_type, u8 sec_level, 986 u16 conn_timeout); 987 struct hci_conn *hci_connect_le(struct hci_dev *hdev, bdaddr_t *dst, 988 u8 dst_type, u8 sec_level, u16 conn_timeout, 989 u8 role, bdaddr_t *direct_rpa); 990 struct hci_conn *hci_connect_acl(struct hci_dev *hdev, bdaddr_t *dst, 991 u8 sec_level, u8 auth_type); 992 struct hci_conn *hci_connect_sco(struct hci_dev *hdev, int type, bdaddr_t *dst, 993 __u16 setting); 994 int hci_conn_check_link_mode(struct hci_conn *conn); 995 int hci_conn_check_secure(struct hci_conn *conn, __u8 sec_level); 996 int hci_conn_security(struct hci_conn *conn, __u8 sec_level, __u8 auth_type, 997 bool initiator); 998 int hci_conn_switch_role(struct hci_conn *conn, __u8 role); 999 1000 void hci_conn_enter_active_mode(struct hci_conn *conn, __u8 force_active); 1001 1002 void hci_le_conn_failed(struct hci_conn *conn, u8 status); 1003 1004 /* 1005 * hci_conn_get() and hci_conn_put() are used to control the life-time of an 1006 * "hci_conn" object. They do not guarantee that the hci_conn object is running, 1007 * working or anything else. They just guarantee that the object is available 1008 * and can be dereferenced. So you can use its locks, local variables and any 1009 * other constant data. 1010 * Before accessing runtime data, you _must_ lock the object and then check that 1011 * it is still running. As soon as you release the locks, the connection might 1012 * get dropped, though. 1013 * 1014 * On the other hand, hci_conn_hold() and hci_conn_drop() are used to control 1015 * how long the underlying connection is held. So every channel that runs on the 1016 * hci_conn object calls this to prevent the connection from disappearing. As 1017 * long as you hold a device, you must also guarantee that you have a valid 1018 * reference to the device via hci_conn_get() (or the initial reference from 1019 * hci_conn_add()). 1020 * The hold()/drop() ref-count is known to drop below 0 sometimes, which doesn't 1021 * break because nobody cares for that. But this means, we cannot use 1022 * _get()/_drop() in it, but require the caller to have a valid ref (FIXME). 1023 */ 1024 1025 static inline struct hci_conn *hci_conn_get(struct hci_conn *conn) 1026 { 1027 get_device(&conn->dev); 1028 return conn; 1029 } 1030 1031 static inline void hci_conn_put(struct hci_conn *conn) 1032 { 1033 put_device(&conn->dev); 1034 } 1035 1036 static inline void hci_conn_hold(struct hci_conn *conn) 1037 { 1038 BT_DBG("hcon %p orig refcnt %d", conn, atomic_read(&conn->refcnt)); 1039 1040 atomic_inc(&conn->refcnt); 1041 cancel_delayed_work(&conn->disc_work); 1042 } 1043 1044 static inline void hci_conn_drop(struct hci_conn *conn) 1045 { 1046 BT_DBG("hcon %p orig refcnt %d", conn, atomic_read(&conn->refcnt)); 1047 1048 if (atomic_dec_and_test(&conn->refcnt)) { 1049 unsigned long timeo; 1050 1051 switch (conn->type) { 1052 case ACL_LINK: 1053 case LE_LINK: 1054 cancel_delayed_work(&conn->idle_work); 1055 if (conn->state == BT_CONNECTED) { 1056 timeo = conn->disc_timeout; 1057 if (!conn->out) 1058 timeo *= 2; 1059 } else { 1060 timeo = 0; 1061 } 1062 break; 1063 1064 case AMP_LINK: 1065 timeo = conn->disc_timeout; 1066 break; 1067 1068 default: 1069 timeo = 0; 1070 break; 1071 } 1072 1073 cancel_delayed_work(&conn->disc_work); 1074 queue_delayed_work(conn->hdev->workqueue, 1075 &conn->disc_work, timeo); 1076 } 1077 } 1078 1079 /* ----- HCI Devices ----- */ 1080 static inline void hci_dev_put(struct hci_dev *d) 1081 { 1082 BT_DBG("%s orig refcnt %d", d->name, 1083 kref_read(&d->dev.kobj.kref)); 1084 1085 put_device(&d->dev); 1086 } 1087 1088 static inline struct hci_dev *hci_dev_hold(struct hci_dev *d) 1089 { 1090 BT_DBG("%s orig refcnt %d", d->name, 1091 kref_read(&d->dev.kobj.kref)); 1092 1093 get_device(&d->dev); 1094 return d; 1095 } 1096 1097 #define hci_dev_lock(d) mutex_lock(&d->lock) 1098 #define hci_dev_unlock(d) mutex_unlock(&d->lock) 1099 1100 #define to_hci_dev(d) container_of(d, struct hci_dev, dev) 1101 #define to_hci_conn(c) container_of(c, struct hci_conn, dev) 1102 1103 static inline void *hci_get_drvdata(struct hci_dev *hdev) 1104 { 1105 return dev_get_drvdata(&hdev->dev); 1106 } 1107 1108 static inline void hci_set_drvdata(struct hci_dev *hdev, void *data) 1109 { 1110 dev_set_drvdata(&hdev->dev, data); 1111 } 1112 1113 struct hci_dev *hci_dev_get(int index); 1114 struct hci_dev *hci_get_route(bdaddr_t *dst, bdaddr_t *src, u8 src_type); 1115 1116 struct hci_dev *hci_alloc_dev(void); 1117 void hci_free_dev(struct hci_dev *hdev); 1118 int hci_register_dev(struct hci_dev *hdev); 1119 void hci_unregister_dev(struct hci_dev *hdev); 1120 int hci_suspend_dev(struct hci_dev *hdev); 1121 int hci_resume_dev(struct hci_dev *hdev); 1122 int hci_reset_dev(struct hci_dev *hdev); 1123 int hci_recv_frame(struct hci_dev *hdev, struct sk_buff *skb); 1124 int hci_recv_diag(struct hci_dev *hdev, struct sk_buff *skb); 1125 __printf(2, 3) void hci_set_hw_info(struct hci_dev *hdev, const char *fmt, ...); 1126 __printf(2, 3) void hci_set_fw_info(struct hci_dev *hdev, const char *fmt, ...); 1127 1128 static inline void hci_set_msft_opcode(struct hci_dev *hdev, __u16 opcode) 1129 { 1130 #if IS_ENABLED(CONFIG_BT_MSFTEXT) 1131 hdev->msft_opcode = opcode; 1132 #endif 1133 } 1134 1135 int hci_dev_open(__u16 dev); 1136 int hci_dev_close(__u16 dev); 1137 int hci_dev_do_close(struct hci_dev *hdev); 1138 int hci_dev_reset(__u16 dev); 1139 int hci_dev_reset_stat(__u16 dev); 1140 int hci_dev_cmd(unsigned int cmd, void __user *arg); 1141 int hci_get_dev_list(void __user *arg); 1142 int hci_get_dev_info(void __user *arg); 1143 int hci_get_conn_list(void __user *arg); 1144 int hci_get_conn_info(struct hci_dev *hdev, void __user *arg); 1145 int hci_get_auth_info(struct hci_dev *hdev, void __user *arg); 1146 int hci_inquiry(void __user *arg); 1147 1148 struct bdaddr_list *hci_bdaddr_list_lookup(struct list_head *list, 1149 bdaddr_t *bdaddr, u8 type); 1150 struct bdaddr_list_with_irk *hci_bdaddr_list_lookup_with_irk( 1151 struct list_head *list, bdaddr_t *bdaddr, 1152 u8 type); 1153 int hci_bdaddr_list_add(struct list_head *list, bdaddr_t *bdaddr, u8 type); 1154 int hci_bdaddr_list_add_with_irk(struct list_head *list, bdaddr_t *bdaddr, 1155 u8 type, u8 *peer_irk, u8 *local_irk); 1156 int hci_bdaddr_list_del(struct list_head *list, bdaddr_t *bdaddr, u8 type); 1157 int hci_bdaddr_list_del_with_irk(struct list_head *list, bdaddr_t *bdaddr, 1158 u8 type); 1159 void hci_bdaddr_list_clear(struct list_head *list); 1160 1161 struct hci_conn_params *hci_conn_params_lookup(struct hci_dev *hdev, 1162 bdaddr_t *addr, u8 addr_type); 1163 struct hci_conn_params *hci_conn_params_add(struct hci_dev *hdev, 1164 bdaddr_t *addr, u8 addr_type); 1165 void hci_conn_params_del(struct hci_dev *hdev, bdaddr_t *addr, u8 addr_type); 1166 void hci_conn_params_clear_disabled(struct hci_dev *hdev); 1167 1168 struct hci_conn_params *hci_pend_le_action_lookup(struct list_head *list, 1169 bdaddr_t *addr, 1170 u8 addr_type); 1171 1172 void hci_uuids_clear(struct hci_dev *hdev); 1173 1174 void hci_link_keys_clear(struct hci_dev *hdev); 1175 struct link_key *hci_find_link_key(struct hci_dev *hdev, bdaddr_t *bdaddr); 1176 struct link_key *hci_add_link_key(struct hci_dev *hdev, struct hci_conn *conn, 1177 bdaddr_t *bdaddr, u8 *val, u8 type, 1178 u8 pin_len, bool *persistent); 1179 struct smp_ltk *hci_add_ltk(struct hci_dev *hdev, bdaddr_t *bdaddr, 1180 u8 addr_type, u8 type, u8 authenticated, 1181 u8 tk[16], u8 enc_size, __le16 ediv, __le64 rand); 1182 struct smp_ltk *hci_find_ltk(struct hci_dev *hdev, bdaddr_t *bdaddr, 1183 u8 addr_type, u8 role); 1184 int hci_remove_ltk(struct hci_dev *hdev, bdaddr_t *bdaddr, u8 bdaddr_type); 1185 void hci_smp_ltks_clear(struct hci_dev *hdev); 1186 int hci_remove_link_key(struct hci_dev *hdev, bdaddr_t *bdaddr); 1187 1188 struct smp_irk *hci_find_irk_by_rpa(struct hci_dev *hdev, bdaddr_t *rpa); 1189 struct smp_irk *hci_find_irk_by_addr(struct hci_dev *hdev, bdaddr_t *bdaddr, 1190 u8 addr_type); 1191 struct smp_irk *hci_add_irk(struct hci_dev *hdev, bdaddr_t *bdaddr, 1192 u8 addr_type, u8 val[16], bdaddr_t *rpa); 1193 void hci_remove_irk(struct hci_dev *hdev, bdaddr_t *bdaddr, u8 addr_type); 1194 bool hci_is_blocked_key(struct hci_dev *hdev, u8 type, u8 val[16]); 1195 void hci_blocked_keys_clear(struct hci_dev *hdev); 1196 void hci_smp_irks_clear(struct hci_dev *hdev); 1197 1198 bool hci_bdaddr_is_paired(struct hci_dev *hdev, bdaddr_t *bdaddr, u8 type); 1199 1200 void hci_remote_oob_data_clear(struct hci_dev *hdev); 1201 struct oob_data *hci_find_remote_oob_data(struct hci_dev *hdev, 1202 bdaddr_t *bdaddr, u8 bdaddr_type); 1203 int hci_add_remote_oob_data(struct hci_dev *hdev, bdaddr_t *bdaddr, 1204 u8 bdaddr_type, u8 *hash192, u8 *rand192, 1205 u8 *hash256, u8 *rand256); 1206 int hci_remove_remote_oob_data(struct hci_dev *hdev, bdaddr_t *bdaddr, 1207 u8 bdaddr_type); 1208 1209 void hci_adv_instances_clear(struct hci_dev *hdev); 1210 struct adv_info *hci_find_adv_instance(struct hci_dev *hdev, u8 instance); 1211 struct adv_info *hci_get_next_instance(struct hci_dev *hdev, u8 instance); 1212 int hci_add_adv_instance(struct hci_dev *hdev, u8 instance, u32 flags, 1213 u16 adv_data_len, u8 *adv_data, 1214 u16 scan_rsp_len, u8 *scan_rsp_data, 1215 u16 timeout, u16 duration); 1216 int hci_remove_adv_instance(struct hci_dev *hdev, u8 instance); 1217 void hci_adv_instances_set_rpa_expired(struct hci_dev *hdev, bool rpa_expired); 1218 1219 void hci_event_packet(struct hci_dev *hdev, struct sk_buff *skb); 1220 1221 void hci_init_sysfs(struct hci_dev *hdev); 1222 void hci_conn_init_sysfs(struct hci_conn *conn); 1223 void hci_conn_add_sysfs(struct hci_conn *conn); 1224 void hci_conn_del_sysfs(struct hci_conn *conn); 1225 1226 #define SET_HCIDEV_DEV(hdev, pdev) ((hdev)->dev.parent = (pdev)) 1227 1228 /* ----- LMP capabilities ----- */ 1229 #define lmp_encrypt_capable(dev) ((dev)->features[0][0] & LMP_ENCRYPT) 1230 #define lmp_rswitch_capable(dev) ((dev)->features[0][0] & LMP_RSWITCH) 1231 #define lmp_hold_capable(dev) ((dev)->features[0][0] & LMP_HOLD) 1232 #define lmp_sniff_capable(dev) ((dev)->features[0][0] & LMP_SNIFF) 1233 #define lmp_park_capable(dev) ((dev)->features[0][1] & LMP_PARK) 1234 #define lmp_inq_rssi_capable(dev) ((dev)->features[0][3] & LMP_RSSI_INQ) 1235 #define lmp_esco_capable(dev) ((dev)->features[0][3] & LMP_ESCO) 1236 #define lmp_bredr_capable(dev) (!((dev)->features[0][4] & LMP_NO_BREDR)) 1237 #define lmp_le_capable(dev) ((dev)->features[0][4] & LMP_LE) 1238 #define lmp_sniffsubr_capable(dev) ((dev)->features[0][5] & LMP_SNIFF_SUBR) 1239 #define lmp_pause_enc_capable(dev) ((dev)->features[0][5] & LMP_PAUSE_ENC) 1240 #define lmp_ext_inq_capable(dev) ((dev)->features[0][6] & LMP_EXT_INQ) 1241 #define lmp_le_br_capable(dev) (!!((dev)->features[0][6] & LMP_SIMUL_LE_BR)) 1242 #define lmp_ssp_capable(dev) ((dev)->features[0][6] & LMP_SIMPLE_PAIR) 1243 #define lmp_no_flush_capable(dev) ((dev)->features[0][6] & LMP_NO_FLUSH) 1244 #define lmp_lsto_capable(dev) ((dev)->features[0][7] & LMP_LSTO) 1245 #define lmp_inq_tx_pwr_capable(dev) ((dev)->features[0][7] & LMP_INQ_TX_PWR) 1246 #define lmp_ext_feat_capable(dev) ((dev)->features[0][7] & LMP_EXTFEATURES) 1247 #define lmp_transp_capable(dev) ((dev)->features[0][2] & LMP_TRANSPARENT) 1248 #define lmp_edr_2m_capable(dev) ((dev)->features[0][3] & LMP_EDR_2M) 1249 #define lmp_edr_3m_capable(dev) ((dev)->features[0][3] & LMP_EDR_3M) 1250 #define lmp_edr_3slot_capable(dev) ((dev)->features[0][4] & LMP_EDR_3SLOT) 1251 #define lmp_edr_5slot_capable(dev) ((dev)->features[0][5] & LMP_EDR_5SLOT) 1252 1253 /* ----- Extended LMP capabilities ----- */ 1254 #define lmp_csb_master_capable(dev) ((dev)->features[2][0] & LMP_CSB_MASTER) 1255 #define lmp_csb_slave_capable(dev) ((dev)->features[2][0] & LMP_CSB_SLAVE) 1256 #define lmp_sync_train_capable(dev) ((dev)->features[2][0] & LMP_SYNC_TRAIN) 1257 #define lmp_sync_scan_capable(dev) ((dev)->features[2][0] & LMP_SYNC_SCAN) 1258 #define lmp_sc_capable(dev) ((dev)->features[2][1] & LMP_SC) 1259 #define lmp_ping_capable(dev) ((dev)->features[2][1] & LMP_PING) 1260 1261 /* ----- Host capabilities ----- */ 1262 #define lmp_host_ssp_capable(dev) ((dev)->features[1][0] & LMP_HOST_SSP) 1263 #define lmp_host_sc_capable(dev) ((dev)->features[1][0] & LMP_HOST_SC) 1264 #define lmp_host_le_capable(dev) (!!((dev)->features[1][0] & LMP_HOST_LE)) 1265 #define lmp_host_le_br_capable(dev) (!!((dev)->features[1][0] & LMP_HOST_LE_BREDR)) 1266 1267 #define hdev_is_powered(dev) (test_bit(HCI_UP, &(dev)->flags) && \ 1268 !hci_dev_test_flag(dev, HCI_AUTO_OFF)) 1269 #define bredr_sc_enabled(dev) (lmp_sc_capable(dev) && \ 1270 hci_dev_test_flag(dev, HCI_SC_ENABLED)) 1271 1272 #define scan_1m(dev) (((dev)->le_tx_def_phys & HCI_LE_SET_PHY_1M) || \ 1273 ((dev)->le_rx_def_phys & HCI_LE_SET_PHY_1M)) 1274 1275 #define scan_2m(dev) (((dev)->le_tx_def_phys & HCI_LE_SET_PHY_2M) || \ 1276 ((dev)->le_rx_def_phys & HCI_LE_SET_PHY_2M)) 1277 1278 #define scan_coded(dev) (((dev)->le_tx_def_phys & HCI_LE_SET_PHY_CODED) || \ 1279 ((dev)->le_rx_def_phys & HCI_LE_SET_PHY_CODED)) 1280 1281 /* Use ext scanning if set ext scan param and ext scan enable is supported */ 1282 #define use_ext_scan(dev) (((dev)->commands[37] & 0x20) && \ 1283 ((dev)->commands[37] & 0x40)) 1284 /* Use ext create connection if command is supported */ 1285 #define use_ext_conn(dev) ((dev)->commands[37] & 0x80) 1286 1287 /* Extended advertising support */ 1288 #define ext_adv_capable(dev) (((dev)->le_features[1] & HCI_LE_EXT_ADV)) 1289 1290 /* ----- HCI protocols ----- */ 1291 #define HCI_PROTO_DEFER 0x01 1292 1293 static inline int hci_proto_connect_ind(struct hci_dev *hdev, bdaddr_t *bdaddr, 1294 __u8 type, __u8 *flags) 1295 { 1296 switch (type) { 1297 case ACL_LINK: 1298 return l2cap_connect_ind(hdev, bdaddr); 1299 1300 case SCO_LINK: 1301 case ESCO_LINK: 1302 return sco_connect_ind(hdev, bdaddr, flags); 1303 1304 default: 1305 BT_ERR("unknown link type %d", type); 1306 return -EINVAL; 1307 } 1308 } 1309 1310 static inline int hci_proto_disconn_ind(struct hci_conn *conn) 1311 { 1312 if (conn->type != ACL_LINK && conn->type != LE_LINK) 1313 return HCI_ERROR_REMOTE_USER_TERM; 1314 1315 return l2cap_disconn_ind(conn); 1316 } 1317 1318 /* ----- HCI callbacks ----- */ 1319 struct hci_cb { 1320 struct list_head list; 1321 1322 char *name; 1323 1324 void (*connect_cfm) (struct hci_conn *conn, __u8 status); 1325 void (*disconn_cfm) (struct hci_conn *conn, __u8 status); 1326 void (*security_cfm) (struct hci_conn *conn, __u8 status, 1327 __u8 encrypt); 1328 void (*key_change_cfm) (struct hci_conn *conn, __u8 status); 1329 void (*role_switch_cfm) (struct hci_conn *conn, __u8 status, __u8 role); 1330 }; 1331 1332 static inline void hci_connect_cfm(struct hci_conn *conn, __u8 status) 1333 { 1334 struct hci_cb *cb; 1335 1336 mutex_lock(&hci_cb_list_lock); 1337 list_for_each_entry(cb, &hci_cb_list, list) { 1338 if (cb->connect_cfm) 1339 cb->connect_cfm(conn, status); 1340 } 1341 mutex_unlock(&hci_cb_list_lock); 1342 1343 if (conn->connect_cfm_cb) 1344 conn->connect_cfm_cb(conn, status); 1345 } 1346 1347 static inline void hci_disconn_cfm(struct hci_conn *conn, __u8 reason) 1348 { 1349 struct hci_cb *cb; 1350 1351 mutex_lock(&hci_cb_list_lock); 1352 list_for_each_entry(cb, &hci_cb_list, list) { 1353 if (cb->disconn_cfm) 1354 cb->disconn_cfm(conn, reason); 1355 } 1356 mutex_unlock(&hci_cb_list_lock); 1357 1358 if (conn->disconn_cfm_cb) 1359 conn->disconn_cfm_cb(conn, reason); 1360 } 1361 1362 static inline void hci_auth_cfm(struct hci_conn *conn, __u8 status) 1363 { 1364 struct hci_cb *cb; 1365 __u8 encrypt; 1366 1367 if (test_bit(HCI_CONN_ENCRYPT_PEND, &conn->flags)) 1368 return; 1369 1370 encrypt = test_bit(HCI_CONN_ENCRYPT, &conn->flags) ? 0x01 : 0x00; 1371 1372 mutex_lock(&hci_cb_list_lock); 1373 list_for_each_entry(cb, &hci_cb_list, list) { 1374 if (cb->security_cfm) 1375 cb->security_cfm(conn, status, encrypt); 1376 } 1377 mutex_unlock(&hci_cb_list_lock); 1378 1379 if (conn->security_cfm_cb) 1380 conn->security_cfm_cb(conn, status); 1381 } 1382 1383 static inline void hci_encrypt_cfm(struct hci_conn *conn, __u8 status, 1384 __u8 encrypt) 1385 { 1386 struct hci_cb *cb; 1387 1388 if (conn->sec_level == BT_SECURITY_SDP) 1389 conn->sec_level = BT_SECURITY_LOW; 1390 1391 if (conn->pending_sec_level > conn->sec_level) 1392 conn->sec_level = conn->pending_sec_level; 1393 1394 mutex_lock(&hci_cb_list_lock); 1395 list_for_each_entry(cb, &hci_cb_list, list) { 1396 if (cb->security_cfm) 1397 cb->security_cfm(conn, status, encrypt); 1398 } 1399 mutex_unlock(&hci_cb_list_lock); 1400 1401 if (conn->security_cfm_cb) 1402 conn->security_cfm_cb(conn, status); 1403 } 1404 1405 static inline void hci_key_change_cfm(struct hci_conn *conn, __u8 status) 1406 { 1407 struct hci_cb *cb; 1408 1409 mutex_lock(&hci_cb_list_lock); 1410 list_for_each_entry(cb, &hci_cb_list, list) { 1411 if (cb->key_change_cfm) 1412 cb->key_change_cfm(conn, status); 1413 } 1414 mutex_unlock(&hci_cb_list_lock); 1415 } 1416 1417 static inline void hci_role_switch_cfm(struct hci_conn *conn, __u8 status, 1418 __u8 role) 1419 { 1420 struct hci_cb *cb; 1421 1422 mutex_lock(&hci_cb_list_lock); 1423 list_for_each_entry(cb, &hci_cb_list, list) { 1424 if (cb->role_switch_cfm) 1425 cb->role_switch_cfm(conn, status, role); 1426 } 1427 mutex_unlock(&hci_cb_list_lock); 1428 } 1429 1430 static inline void *eir_get_data(u8 *eir, size_t eir_len, u8 type, 1431 size_t *data_len) 1432 { 1433 size_t parsed = 0; 1434 1435 if (eir_len < 2) 1436 return NULL; 1437 1438 while (parsed < eir_len - 1) { 1439 u8 field_len = eir[0]; 1440 1441 if (field_len == 0) 1442 break; 1443 1444 parsed += field_len + 1; 1445 1446 if (parsed > eir_len) 1447 break; 1448 1449 if (eir[1] != type) { 1450 eir += field_len + 1; 1451 continue; 1452 } 1453 1454 /* Zero length data */ 1455 if (field_len == 1) 1456 return NULL; 1457 1458 if (data_len) 1459 *data_len = field_len - 1; 1460 1461 return &eir[2]; 1462 } 1463 1464 return NULL; 1465 } 1466 1467 static inline bool hci_bdaddr_is_rpa(bdaddr_t *bdaddr, u8 addr_type) 1468 { 1469 if (addr_type != ADDR_LE_DEV_RANDOM) 1470 return false; 1471 1472 if ((bdaddr->b[5] & 0xc0) == 0x40) 1473 return true; 1474 1475 return false; 1476 } 1477 1478 static inline bool hci_is_identity_address(bdaddr_t *addr, u8 addr_type) 1479 { 1480 if (addr_type == ADDR_LE_DEV_PUBLIC) 1481 return true; 1482 1483 /* Check for Random Static address type */ 1484 if ((addr->b[5] & 0xc0) == 0xc0) 1485 return true; 1486 1487 return false; 1488 } 1489 1490 static inline struct smp_irk *hci_get_irk(struct hci_dev *hdev, 1491 bdaddr_t *bdaddr, u8 addr_type) 1492 { 1493 if (!hci_bdaddr_is_rpa(bdaddr, addr_type)) 1494 return NULL; 1495 1496 return hci_find_irk_by_rpa(hdev, bdaddr); 1497 } 1498 1499 static inline int hci_check_conn_params(u16 min, u16 max, u16 latency, 1500 u16 to_multiplier) 1501 { 1502 u16 max_latency; 1503 1504 if (min > max || min < 6 || max > 3200) 1505 return -EINVAL; 1506 1507 if (to_multiplier < 10 || to_multiplier > 3200) 1508 return -EINVAL; 1509 1510 if (max >= to_multiplier * 8) 1511 return -EINVAL; 1512 1513 max_latency = (to_multiplier * 4 / max) - 1; 1514 if (latency > 499 || latency > max_latency) 1515 return -EINVAL; 1516 1517 return 0; 1518 } 1519 1520 int hci_register_cb(struct hci_cb *hcb); 1521 int hci_unregister_cb(struct hci_cb *hcb); 1522 1523 struct sk_buff *__hci_cmd_sync(struct hci_dev *hdev, u16 opcode, u32 plen, 1524 const void *param, u32 timeout); 1525 struct sk_buff *__hci_cmd_sync_ev(struct hci_dev *hdev, u16 opcode, u32 plen, 1526 const void *param, u8 event, u32 timeout); 1527 int __hci_cmd_send(struct hci_dev *hdev, u16 opcode, u32 plen, 1528 const void *param); 1529 1530 int hci_send_cmd(struct hci_dev *hdev, __u16 opcode, __u32 plen, 1531 const void *param); 1532 void hci_send_acl(struct hci_chan *chan, struct sk_buff *skb, __u16 flags); 1533 void hci_send_sco(struct hci_conn *conn, struct sk_buff *skb); 1534 1535 void *hci_sent_cmd_data(struct hci_dev *hdev, __u16 opcode); 1536 1537 struct sk_buff *hci_cmd_sync(struct hci_dev *hdev, u16 opcode, u32 plen, 1538 const void *param, u32 timeout); 1539 1540 u32 hci_conn_get_phy(struct hci_conn *conn); 1541 1542 /* ----- HCI Sockets ----- */ 1543 void hci_send_to_sock(struct hci_dev *hdev, struct sk_buff *skb); 1544 void hci_send_to_channel(unsigned short channel, struct sk_buff *skb, 1545 int flag, struct sock *skip_sk); 1546 void hci_send_to_monitor(struct hci_dev *hdev, struct sk_buff *skb); 1547 void hci_send_monitor_ctrl_event(struct hci_dev *hdev, u16 event, 1548 void *data, u16 data_len, ktime_t tstamp, 1549 int flag, struct sock *skip_sk); 1550 1551 void hci_sock_dev_event(struct hci_dev *hdev, int event); 1552 1553 #define HCI_MGMT_VAR_LEN BIT(0) 1554 #define HCI_MGMT_NO_HDEV BIT(1) 1555 #define HCI_MGMT_UNTRUSTED BIT(2) 1556 #define HCI_MGMT_UNCONFIGURED BIT(3) 1557 1558 struct hci_mgmt_handler { 1559 int (*func) (struct sock *sk, struct hci_dev *hdev, void *data, 1560 u16 data_len); 1561 size_t data_len; 1562 unsigned long flags; 1563 }; 1564 1565 struct hci_mgmt_chan { 1566 struct list_head list; 1567 unsigned short channel; 1568 size_t handler_count; 1569 const struct hci_mgmt_handler *handlers; 1570 void (*hdev_init) (struct sock *sk, struct hci_dev *hdev); 1571 }; 1572 1573 int hci_mgmt_chan_register(struct hci_mgmt_chan *c); 1574 void hci_mgmt_chan_unregister(struct hci_mgmt_chan *c); 1575 1576 /* Management interface */ 1577 #define DISCOV_TYPE_BREDR (BIT(BDADDR_BREDR)) 1578 #define DISCOV_TYPE_LE (BIT(BDADDR_LE_PUBLIC) | \ 1579 BIT(BDADDR_LE_RANDOM)) 1580 #define DISCOV_TYPE_INTERLEAVED (BIT(BDADDR_BREDR) | \ 1581 BIT(BDADDR_LE_PUBLIC) | \ 1582 BIT(BDADDR_LE_RANDOM)) 1583 1584 /* These LE scan and inquiry parameters were chosen according to LE General 1585 * Discovery Procedure specification. 1586 */ 1587 #define DISCOV_LE_SCAN_WIN 0x12 1588 #define DISCOV_LE_SCAN_INT 0x12 1589 #define DISCOV_LE_TIMEOUT 10240 /* msec */ 1590 #define DISCOV_INTERLEAVED_TIMEOUT 5120 /* msec */ 1591 #define DISCOV_INTERLEAVED_INQUIRY_LEN 0x04 1592 #define DISCOV_BREDR_INQUIRY_LEN 0x08 1593 #define DISCOV_LE_RESTART_DELAY msecs_to_jiffies(200) /* msec */ 1594 #define DISCOV_LE_FAST_ADV_INT_MIN 100 /* msec */ 1595 #define DISCOV_LE_FAST_ADV_INT_MAX 150 /* msec */ 1596 1597 void mgmt_fill_version_info(void *ver); 1598 int mgmt_new_settings(struct hci_dev *hdev); 1599 void mgmt_index_added(struct hci_dev *hdev); 1600 void mgmt_index_removed(struct hci_dev *hdev); 1601 void mgmt_set_powered_failed(struct hci_dev *hdev, int err); 1602 void mgmt_power_on(struct hci_dev *hdev, int err); 1603 void __mgmt_power_off(struct hci_dev *hdev); 1604 void mgmt_new_link_key(struct hci_dev *hdev, struct link_key *key, 1605 bool persistent); 1606 void mgmt_device_connected(struct hci_dev *hdev, struct hci_conn *conn, 1607 u32 flags, u8 *name, u8 name_len); 1608 void mgmt_device_disconnected(struct hci_dev *hdev, bdaddr_t *bdaddr, 1609 u8 link_type, u8 addr_type, u8 reason, 1610 bool mgmt_connected); 1611 void mgmt_disconnect_failed(struct hci_dev *hdev, bdaddr_t *bdaddr, 1612 u8 link_type, u8 addr_type, u8 status); 1613 void mgmt_connect_failed(struct hci_dev *hdev, bdaddr_t *bdaddr, u8 link_type, 1614 u8 addr_type, u8 status); 1615 void mgmt_pin_code_request(struct hci_dev *hdev, bdaddr_t *bdaddr, u8 secure); 1616 void mgmt_pin_code_reply_complete(struct hci_dev *hdev, bdaddr_t *bdaddr, 1617 u8 status); 1618 void mgmt_pin_code_neg_reply_complete(struct hci_dev *hdev, bdaddr_t *bdaddr, 1619 u8 status); 1620 int mgmt_user_confirm_request(struct hci_dev *hdev, bdaddr_t *bdaddr, 1621 u8 link_type, u8 addr_type, u32 value, 1622 u8 confirm_hint); 1623 int mgmt_user_confirm_reply_complete(struct hci_dev *hdev, bdaddr_t *bdaddr, 1624 u8 link_type, u8 addr_type, u8 status); 1625 int mgmt_user_confirm_neg_reply_complete(struct hci_dev *hdev, bdaddr_t *bdaddr, 1626 u8 link_type, u8 addr_type, u8 status); 1627 int mgmt_user_passkey_request(struct hci_dev *hdev, bdaddr_t *bdaddr, 1628 u8 link_type, u8 addr_type); 1629 int mgmt_user_passkey_reply_complete(struct hci_dev *hdev, bdaddr_t *bdaddr, 1630 u8 link_type, u8 addr_type, u8 status); 1631 int mgmt_user_passkey_neg_reply_complete(struct hci_dev *hdev, bdaddr_t *bdaddr, 1632 u8 link_type, u8 addr_type, u8 status); 1633 int mgmt_user_passkey_notify(struct hci_dev *hdev, bdaddr_t *bdaddr, 1634 u8 link_type, u8 addr_type, u32 passkey, 1635 u8 entered); 1636 void mgmt_auth_failed(struct hci_conn *conn, u8 status); 1637 void mgmt_auth_enable_complete(struct hci_dev *hdev, u8 status); 1638 void mgmt_ssp_enable_complete(struct hci_dev *hdev, u8 enable, u8 status); 1639 void mgmt_set_class_of_dev_complete(struct hci_dev *hdev, u8 *dev_class, 1640 u8 status); 1641 void mgmt_set_local_name_complete(struct hci_dev *hdev, u8 *name, u8 status); 1642 void mgmt_start_discovery_complete(struct hci_dev *hdev, u8 status); 1643 void mgmt_stop_discovery_complete(struct hci_dev *hdev, u8 status); 1644 void mgmt_device_found(struct hci_dev *hdev, bdaddr_t *bdaddr, u8 link_type, 1645 u8 addr_type, u8 *dev_class, s8 rssi, u32 flags, 1646 u8 *eir, u16 eir_len, u8 *scan_rsp, u8 scan_rsp_len); 1647 void mgmt_remote_name(struct hci_dev *hdev, bdaddr_t *bdaddr, u8 link_type, 1648 u8 addr_type, s8 rssi, u8 *name, u8 name_len); 1649 void mgmt_discovering(struct hci_dev *hdev, u8 discovering); 1650 bool mgmt_powering_down(struct hci_dev *hdev); 1651 void mgmt_new_ltk(struct hci_dev *hdev, struct smp_ltk *key, bool persistent); 1652 void mgmt_new_irk(struct hci_dev *hdev, struct smp_irk *irk, bool persistent); 1653 void mgmt_new_csrk(struct hci_dev *hdev, struct smp_csrk *csrk, 1654 bool persistent); 1655 void mgmt_new_conn_param(struct hci_dev *hdev, bdaddr_t *bdaddr, 1656 u8 bdaddr_type, u8 store_hint, u16 min_interval, 1657 u16 max_interval, u16 latency, u16 timeout); 1658 void mgmt_smp_complete(struct hci_conn *conn, bool complete); 1659 bool mgmt_get_connectable(struct hci_dev *hdev); 1660 void mgmt_set_connectable_complete(struct hci_dev *hdev, u8 status); 1661 void mgmt_set_discoverable_complete(struct hci_dev *hdev, u8 status); 1662 u8 mgmt_get_adv_discov_flags(struct hci_dev *hdev); 1663 void mgmt_advertising_added(struct sock *sk, struct hci_dev *hdev, 1664 u8 instance); 1665 void mgmt_advertising_removed(struct sock *sk, struct hci_dev *hdev, 1666 u8 instance); 1667 int mgmt_phy_configuration_changed(struct hci_dev *hdev, struct sock *skip); 1668 1669 u8 hci_le_conn_update(struct hci_conn *conn, u16 min, u16 max, u16 latency, 1670 u16 to_multiplier); 1671 void hci_le_start_enc(struct hci_conn *conn, __le16 ediv, __le64 rand, 1672 __u8 ltk[16], __u8 key_size); 1673 1674 void hci_copy_identity_address(struct hci_dev *hdev, bdaddr_t *bdaddr, 1675 u8 *bdaddr_type); 1676 1677 #define SCO_AIRMODE_MASK 0x0003 1678 #define SCO_AIRMODE_CVSD 0x0000 1679 #define SCO_AIRMODE_TRANSP 0x0003 1680 1681 #endif /* __HCI_CORE_H */ 1682