include/net/bluetooth/hci_core.h

   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/idr.h>
  29 #include <linux/leds.h>
  30 #include <linux/rculist.h>
  31
  32 #include <net/bluetooth/hci.h>
  33 #include <net/bluetooth/hci_sync.h>
  34 #include <net/bluetooth/hci_sock.h>
  35
  36 /* HCI priority */
  37 #define HCI_PRIO_MAX    7
  38
  39 /* HCI maximum id value */
  40 #define HCI_MAX_ID 10000
  41
  42 /* HCI Core structures */
  43 struct inquiry_data {
  44         bdaddr_t        bdaddr;
  45         __u8            pscan_rep_mode;
  46         __u8            pscan_period_mode;
  47         __u8            pscan_mode;
  48         __u8            dev_class[3];
  49         __le16          clock_offset;
  50         __s8            rssi;
  51         __u8            ssp_mode;
  52 };
  53
  54 struct inquiry_entry {
  55         struct list_head        all;            /* inq_cache.all */
  56         struct list_head        list;           /* unknown or resolve */
  57         enum {
  58                 NAME_NOT_KNOWN,
  59                 NAME_NEEDED,
  60                 NAME_PENDING,
  61                 NAME_KNOWN,
  62         } name_state;
  63         __u32                   timestamp;
  64         struct inquiry_data     data;
  65 };
  66
  67 struct discovery_state {
  68         int                     type;
  69         enum {
  70                 DISCOVERY_STOPPED,
  71                 DISCOVERY_STARTING,
  72                 DISCOVERY_FINDING,
  73                 DISCOVERY_RESOLVING,
  74                 DISCOVERY_STOPPING,
  75         } state;
  76         struct list_head        all;    /* All devices found during inquiry */
  77         struct list_head        unknown;        /* Name state not known */
  78         struct list_head        resolve;        /* Name needs to be resolved */
  79         __u32                   timestamp;
  80         bdaddr_t                last_adv_addr;
  81         u8                      last_adv_addr_type;
  82         s8                      last_adv_rssi;
  83         u32                     last_adv_flags;
  84         u8                      last_adv_data[HCI_MAX_AD_LENGTH];
  85         u8                      last_adv_data_len;
  86         bool                    report_invalid_rssi;
  87         bool                    result_filtering;
  88         bool                    limited;
  89         s8                      rssi;
  90         u16                     uuid_count;
  91         u8                      (*uuids)[16];
  92         unsigned long           scan_start;
  93         unsigned long           scan_duration;
  94         unsigned long           name_resolve_timeout;
  95 };
  96
  97 #define SUSPEND_NOTIFIER_TIMEOUT        msecs_to_jiffies(2000) /* 2 seconds */
  98
  99 enum suspend_tasks {
 100         SUSPEND_PAUSE_DISCOVERY,
 101         SUSPEND_UNPAUSE_DISCOVERY,
 102
 103         SUSPEND_PAUSE_ADVERTISING,
 104         SUSPEND_UNPAUSE_ADVERTISING,
 105
 106         SUSPEND_SCAN_DISABLE,
 107         SUSPEND_SCAN_ENABLE,
 108         SUSPEND_DISCONNECTING,
 109
 110         SUSPEND_POWERING_DOWN,
 111
 112         SUSPEND_PREPARE_NOTIFIER,
 113
 114         SUSPEND_SET_ADV_FILTER,
 115         __SUSPEND_NUM_TASKS
 116 };
 117
 118 enum suspended_state {
 119         BT_RUNNING = 0,
 120         BT_SUSPEND_DISCONNECT,
 121         BT_SUSPEND_CONFIGURE_WAKE,
 122 };
 123
 124 struct hci_conn_hash {
 125         struct list_head list;
 126         unsigned int     acl_num;
 127         unsigned int     amp_num;
 128         unsigned int     sco_num;
 129         unsigned int     iso_num;
 130         unsigned int     le_num;
 131         unsigned int     le_num_peripheral;
 132 };
 133
 134 struct bdaddr_list {
 135         struct list_head list;
 136         bdaddr_t bdaddr;
 137         u8 bdaddr_type;
 138 };
 139
 140 struct codec_list {
 141         struct list_head list;
 142         u8      id;
 143         __u16   cid;
 144         __u16   vid;
 145         u8      transport;
 146         u8      num_caps;
 147         u32     len;
 148         struct hci_codec_caps caps[];
 149 };
 150
 151 struct bdaddr_list_with_irk {
 152         struct list_head list;
 153         bdaddr_t bdaddr;
 154         u8 bdaddr_type;
 155         u8 peer_irk[16];
 156         u8 local_irk[16];
 157 };
 158
 159 /* Bitmask of connection flags */
 160 enum hci_conn_flags {
 161         HCI_CONN_FLAG_REMOTE_WAKEUP = 1,
 162         HCI_CONN_FLAG_DEVICE_PRIVACY = 2,
 163 };
 164 typedef u8 hci_conn_flags_t;
 165
 166 struct bdaddr_list_with_flags {
 167         struct list_head list;
 168         bdaddr_t bdaddr;
 169         u8 bdaddr_type;
 170         hci_conn_flags_t flags;
 171 };
 172
 173 struct bt_uuid {
 174         struct list_head list;
 175         u8 uuid[16];
 176         u8 size;
 177         u8 svc_hint;
 178 };
 179
 180 struct blocked_key {
 181         struct list_head list;
 182         struct rcu_head rcu;
 183         u8 type;
 184         u8 val[16];
 185 };
 186
 187 struct smp_csrk {
 188         bdaddr_t bdaddr;
 189         u8 bdaddr_type;
 190         u8 type;
 191         u8 val[16];
 192 };
 193
 194 struct smp_ltk {
 195         struct list_head list;
 196         struct rcu_head rcu;
 197         bdaddr_t bdaddr;
 198         u8 bdaddr_type;
 199         u8 authenticated;
 200         u8 type;
 201         u8 enc_size;
 202         __le16 ediv;
 203         __le64 rand;
 204         u8 val[16];
 205 };
 206
 207 struct smp_irk {
 208         struct list_head list;
 209         struct rcu_head rcu;
 210         bdaddr_t rpa;
 211         bdaddr_t bdaddr;
 212         u8 addr_type;
 213         u8 val[16];
 214 };
 215
 216 struct link_key {
 217         struct list_head list;
 218         struct rcu_head rcu;
 219         bdaddr_t bdaddr;
 220         u8 type;
 221         u8 val[HCI_LINK_KEY_SIZE];
 222         u8 pin_len;
 223 };
 224
 225 struct oob_data {
 226         struct list_head list;
 227         bdaddr_t bdaddr;
 228         u8 bdaddr_type;
 229         u8 present;
 230         u8 hash192[16];
 231         u8 rand192[16];
 232         u8 hash256[16];
 233         u8 rand256[16];
 234 };
 235
 236 struct adv_info {
 237         struct list_head list;
 238         bool    enabled;
 239         bool    pending;
 240         bool    periodic;
 241         __u8    mesh;
 242         __u8    instance;
 243         __u32   flags;
 244         __u16   timeout;
 245         __u16   remaining_time;
 246         __u16   duration;
 247         __u16   adv_data_len;
 248         __u8    adv_data[HCI_MAX_EXT_AD_LENGTH];
 249         bool    adv_data_changed;
 250         __u16   scan_rsp_len;
 251         __u8    scan_rsp_data[HCI_MAX_EXT_AD_LENGTH];
 252         bool    scan_rsp_changed;
 253         __u16   per_adv_data_len;
 254         __u8    per_adv_data[HCI_MAX_PER_AD_LENGTH];
 255         __s8    tx_power;
 256         __u32   min_interval;
 257         __u32   max_interval;
 258         bdaddr_t        random_addr;
 259         bool            rpa_expired;
 260         struct delayed_work     rpa_expired_cb;
 261 };
 262
 263 #define HCI_MAX_ADV_INSTANCES           5
 264 #define HCI_DEFAULT_ADV_DURATION        2
 265
 266 #define HCI_ADV_TX_POWER_NO_PREFERENCE 0x7F
 267
 268 #define DATA_CMP(_d1, _l1, _d2, _l2) \
 269         (_l1 == _l2 ? memcmp(_d1, _d2, _l1) : _l1 - _l2)
 270
 271 #define ADV_DATA_CMP(_adv, _data, _len) \
 272         DATA_CMP((_adv)->adv_data, (_adv)->adv_data_len, _data, _len)
 273
 274 #define SCAN_RSP_CMP(_adv, _data, _len) \
 275         DATA_CMP((_adv)->scan_rsp_data, (_adv)->scan_rsp_len, _data, _len)
 276
 277 struct monitored_device {
 278         struct list_head list;
 279
 280         bdaddr_t bdaddr;
 281         __u8     addr_type;
 282         __u16    handle;
 283         bool     notified;
 284 };
 285
 286 struct adv_pattern {
 287         struct list_head list;
 288         __u8 ad_type;
 289         __u8 offset;
 290         __u8 length;
 291         __u8 value[HCI_MAX_AD_LENGTH];
 292 };
 293
 294 struct adv_rssi_thresholds {
 295         __s8 low_threshold;
 296         __s8 high_threshold;
 297         __u16 low_threshold_timeout;
 298         __u16 high_threshold_timeout;
 299         __u8 sampling_period;
 300 };
 301
 302 struct adv_monitor {
 303         struct list_head patterns;
 304         struct adv_rssi_thresholds rssi;
 305         __u16           handle;
 306
 307         enum {
 308                 ADV_MONITOR_STATE_NOT_REGISTERED,
 309                 ADV_MONITOR_STATE_REGISTERED,
 310                 ADV_MONITOR_STATE_OFFLOADED
 311         } state;
 312 };
 313
 314 #define HCI_MIN_ADV_MONITOR_HANDLE              1
 315 #define HCI_MAX_ADV_MONITOR_NUM_HANDLES         32
 316 #define HCI_MAX_ADV_MONITOR_NUM_PATTERNS        16
 317 #define HCI_ADV_MONITOR_EXT_NONE                1
 318 #define HCI_ADV_MONITOR_EXT_MSFT                2
 319
 320 #define HCI_MAX_SHORT_NAME_LENGTH       10
 321
 322 #define HCI_CONN_HANDLE_UNSET           0xffff
 323 #define HCI_CONN_HANDLE_MAX             0x0eff
 324
 325 /* Min encryption key size to match with SMP */
 326 #define HCI_MIN_ENC_KEY_SIZE            7
 327
 328 /* Default LE RPA expiry time, 15 minutes */
 329 #define HCI_DEFAULT_RPA_TIMEOUT         (15 * 60)
 330
 331 /* Default min/max age of connection information (1s/3s) */
 332 #define DEFAULT_CONN_INFO_MIN_AGE       1000
 333 #define DEFAULT_CONN_INFO_MAX_AGE       3000
 334 /* Default authenticated payload timeout 30s */
 335 #define DEFAULT_AUTH_PAYLOAD_TIMEOUT   0x0bb8
 336
 337 struct amp_assoc {
 338         __u16   len;
 339         __u16   offset;
 340         __u16   rem_len;
 341         __u16   len_so_far;
 342         __u8    data[HCI_MAX_AMP_ASSOC_SIZE];
 343 };
 344
 345 #define HCI_MAX_PAGES   3
 346
 347 struct hci_dev {
 348         struct list_head list;
 349         struct mutex    lock;
 350
 351         char            name[8];
 352         unsigned long   flags;
 353         __u16           id;
 354         __u8            bus;
 355         __u8            dev_type;
 356         bdaddr_t        bdaddr;
 357         bdaddr_t        setup_addr;
 358         bdaddr_t        public_addr;
 359         bdaddr_t        random_addr;
 360         bdaddr_t        static_addr;
 361         __u8            adv_addr_type;
 362         __u8            dev_name[HCI_MAX_NAME_LENGTH];
 363         __u8            short_name[HCI_MAX_SHORT_NAME_LENGTH];
 364         __u8            eir[HCI_MAX_EIR_LENGTH];
 365         __u16           appearance;
 366         __u8            dev_class[3];
 367         __u8            major_class;
 368         __u8            minor_class;
 369         __u8            max_page;
 370         __u8            features[HCI_MAX_PAGES][8];
 371         __u8            le_features[8];
 372         __u8            le_accept_list_size;
 373         __u8            le_resolv_list_size;
 374         __u8            le_num_of_adv_sets;
 375         __u8            le_states[8];
 376         __u8            mesh_ad_types[16];
 377         __u8            mesh_send_ref;
 378         __u8            commands[64];
 379         __u8            hci_ver;
 380         __u16           hci_rev;
 381         __u8            lmp_ver;
 382         __u16           manufacturer;
 383         __u16           lmp_subver;
 384         __u16           voice_setting;
 385         __u8            num_iac;
 386         __u16           stored_max_keys;
 387         __u16           stored_num_keys;
 388         __u8            io_capability;
 389         __s8            inq_tx_power;
 390         __u8            err_data_reporting;
 391         __u16           page_scan_interval;
 392         __u16           page_scan_window;
 393         __u8            page_scan_type;
 394         __u8            le_adv_channel_map;
 395         __u16           le_adv_min_interval;
 396         __u16           le_adv_max_interval;
 397         __u8            le_scan_type;
 398         __u16           le_scan_interval;
 399         __u16           le_scan_window;
 400         __u16           le_scan_int_suspend;
 401         __u16           le_scan_window_suspend;
 402         __u16           le_scan_int_discovery;
 403         __u16           le_scan_window_discovery;
 404         __u16           le_scan_int_adv_monitor;
 405         __u16           le_scan_window_adv_monitor;
 406         __u16           le_scan_int_connect;
 407         __u16           le_scan_window_connect;
 408         __u16           le_conn_min_interval;
 409         __u16           le_conn_max_interval;
 410         __u16           le_conn_latency;
 411         __u16           le_supv_timeout;
 412         __u16           le_def_tx_len;
 413         __u16           le_def_tx_time;
 414         __u16           le_max_tx_len;
 415         __u16           le_max_tx_time;
 416         __u16           le_max_rx_len;
 417         __u16           le_max_rx_time;
 418         __u8            le_max_key_size;
 419         __u8            le_min_key_size;
 420         __u16           discov_interleaved_timeout;
 421         __u16           conn_info_min_age;
 422         __u16           conn_info_max_age;
 423         __u16           auth_payload_timeout;
 424         __u8            min_enc_key_size;
 425         __u8            max_enc_key_size;
 426         __u8            pairing_opts;
 427         __u8            ssp_debug_mode;
 428         __u8            hw_error_code;
 429         __u32           clock;
 430         __u16           advmon_allowlist_duration;
 431         __u16           advmon_no_filter_duration;
 432         __u8            enable_advmon_interleave_scan;
 433
 434         __u16           devid_source;
 435         __u16           devid_vendor;
 436         __u16           devid_product;
 437         __u16           devid_version;
 438
 439         __u8            def_page_scan_type;
 440         __u16           def_page_scan_int;
 441         __u16           def_page_scan_window;
 442         __u8            def_inq_scan_type;
 443         __u16           def_inq_scan_int;
 444         __u16           def_inq_scan_window;
 445         __u16           def_br_lsto;
 446         __u16           def_page_timeout;
 447         __u16           def_multi_adv_rotation_duration;
 448         __u16           def_le_autoconnect_timeout;
 449         __s8            min_le_tx_power;
 450         __s8            max_le_tx_power;
 451
 452         __u16           pkt_type;
 453         __u16           esco_type;
 454         __u16           link_policy;
 455         __u16           link_mode;
 456
 457         __u32           idle_timeout;
 458         __u16           sniff_min_interval;
 459         __u16           sniff_max_interval;
 460
 461         __u8            amp_status;
 462         __u32           amp_total_bw;
 463         __u32           amp_max_bw;
 464         __u32           amp_min_latency;
 465         __u32           amp_max_pdu;
 466         __u8            amp_type;
 467         __u16           amp_pal_cap;
 468         __u16           amp_assoc_size;
 469         __u32           amp_max_flush_to;
 470         __u32           amp_be_flush_to;
 471
 472         struct amp_assoc        loc_assoc;
 473
 474         __u8            flow_ctl_mode;
 475
 476         unsigned int    auto_accept_delay;
 477
 478         unsigned long   quirks;
 479
 480         atomic_t        cmd_cnt;
 481         unsigned int    acl_cnt;
 482         unsigned int    sco_cnt;
 483         unsigned int    le_cnt;
 484         unsigned int    iso_cnt;
 485
 486         unsigned int    acl_mtu;
 487         unsigned int    sco_mtu;
 488         unsigned int    le_mtu;
 489         unsigned int    iso_mtu;
 490         unsigned int    acl_pkts;
 491         unsigned int    sco_pkts;
 492         unsigned int    le_pkts;
 493         unsigned int    iso_pkts;
 494
 495         __u16           block_len;
 496         __u16           block_mtu;
 497         __u16           num_blocks;
 498         __u16           block_cnt;
 499
 500         unsigned long   acl_last_tx;
 501         unsigned long   sco_last_tx;
 502         unsigned long   le_last_tx;
 503
 504         __u8            le_tx_def_phys;
 505         __u8            le_rx_def_phys;
 506
 507         struct workqueue_struct *workqueue;
 508         struct workqueue_struct *req_workqueue;
 509
 510         struct work_struct      power_on;
 511         struct delayed_work     power_off;
 512         struct work_struct      error_reset;
 513         struct work_struct      cmd_sync_work;
 514         struct list_head        cmd_sync_work_list;
 515         struct mutex            cmd_sync_work_lock;
 516         struct work_struct      cmd_sync_cancel_work;
 517         struct work_struct      reenable_adv_work;
 518
 519         __u16                   discov_timeout;
 520         struct delayed_work     discov_off;
 521
 522         struct delayed_work     service_cache;
 523
 524         struct delayed_work     cmd_timer;
 525         struct delayed_work     ncmd_timer;
 526
 527         struct work_struct      rx_work;
 528         struct work_struct      cmd_work;
 529         struct work_struct      tx_work;
 530
 531         struct delayed_work     le_scan_disable;
 532         struct delayed_work     le_scan_restart;
 533
 534         struct sk_buff_head     rx_q;
 535         struct sk_buff_head     raw_q;
 536         struct sk_buff_head     cmd_q;
 537
 538         struct sk_buff          *sent_cmd;
 539         struct sk_buff          *recv_event;
 540
 541         struct mutex            req_lock;
 542         wait_queue_head_t       req_wait_q;
 543         __u32                   req_status;
 544         __u32                   req_result;
 545         struct sk_buff          *req_skb;
 546
 547         void                    *smp_data;
 548         void                    *smp_bredr_data;
 549
 550         struct discovery_state  discovery;
 551
 552         int                     discovery_old_state;
 553         bool                    discovery_paused;
 554         int                     advertising_old_state;
 555         bool                    advertising_paused;
 556
 557         struct notifier_block   suspend_notifier;
 558         enum suspended_state    suspend_state_next;
 559         enum suspended_state    suspend_state;
 560         bool                    scanning_paused;
 561         bool                    suspended;
 562         u8                      wake_reason;
 563         bdaddr_t                wake_addr;
 564         u8                      wake_addr_type;
 565
 566         struct hci_conn_hash    conn_hash;
 567
 568         struct list_head        mesh_pending;
 569         struct list_head        mgmt_pending;
 570         struct list_head        reject_list;
 571         struct list_head        accept_list;
 572         struct list_head        uuids;
 573         struct list_head        link_keys;
 574         struct list_head        long_term_keys;
 575         struct list_head        identity_resolving_keys;
 576         struct list_head        remote_oob_data;
 577         struct list_head        le_accept_list;
 578         struct list_head        le_resolv_list;
 579         struct list_head        le_conn_params;
 580         struct list_head        pend_le_conns;
 581         struct list_head        pend_le_reports;
 582         struct list_head        blocked_keys;
 583         struct list_head        local_codecs;
 584
 585         struct hci_dev_stats    stat;
 586
 587         atomic_t                promisc;
 588
 589         const char              *hw_info;
 590         const char              *fw_info;
 591         struct dentry           *debugfs;
 592
 593         struct device           dev;
 594
 595         struct rfkill           *rfkill;
 596
 597         DECLARE_BITMAP(dev_flags, __HCI_NUM_FLAGS);
 598         hci_conn_flags_t        conn_flags;
 599
 600         __s8                    adv_tx_power;
 601         __u8                    adv_data[HCI_MAX_EXT_AD_LENGTH];
 602         __u8                    adv_data_len;
 603         __u8                    scan_rsp_data[HCI_MAX_EXT_AD_LENGTH];
 604         __u8                    scan_rsp_data_len;
 605         __u8                    per_adv_data[HCI_MAX_PER_AD_LENGTH];
 606         __u8                    per_adv_data_len;
 607
 608         struct list_head        adv_instances;
 609         unsigned int            adv_instance_cnt;
 610         __u8                    cur_adv_instance;
 611         __u16                   adv_instance_timeout;
 612         struct delayed_work     adv_instance_expire;
 613
 614         struct idr              adv_monitors_idr;
 615         unsigned int            adv_monitors_cnt;
 616
 617         __u8                    irk[16];
 618         __u32                   rpa_timeout;
 619         struct delayed_work     rpa_expired;
 620         bdaddr_t                rpa;
 621
 622         struct delayed_work     mesh_send_done;
 623
 624         enum {
 625                 INTERLEAVE_SCAN_NONE,
 626                 INTERLEAVE_SCAN_NO_FILTER,
 627                 INTERLEAVE_SCAN_ALLOWLIST
 628         } interleave_scan_state;
 629
 630         struct delayed_work     interleave_scan;
 631
 632         struct list_head        monitored_devices;
 633         bool                    advmon_pend_notify;
 634
 635 #if IS_ENABLED(CONFIG_BT_LEDS)
 636         struct led_trigger      *power_led;
 637 #endif
 638
 639 #if IS_ENABLED(CONFIG_BT_MSFTEXT)
 640         __u16                   msft_opcode;
 641         void                    *msft_data;
 642         bool                    msft_curve_validity;
 643 #endif
 644
 645 #if IS_ENABLED(CONFIG_BT_AOSPEXT)
 646         bool                    aosp_capable;
 647         bool                    aosp_quality_report;
 648 #endif
 649
 650         int (*open)(struct hci_dev *hdev);
 651         int (*close)(struct hci_dev *hdev);
 652         int (*flush)(struct hci_dev *hdev);
 653         int (*setup)(struct hci_dev *hdev);
 654         int (*shutdown)(struct hci_dev *hdev);
 655         int (*send)(struct hci_dev *hdev, struct sk_buff *skb);
 656         void (*notify)(struct hci_dev *hdev, unsigned int evt);
 657         void (*hw_error)(struct hci_dev *hdev, u8 code);
 658         int (*post_init)(struct hci_dev *hdev);
 659         int (*set_diag)(struct hci_dev *hdev, bool enable);
 660         int (*set_bdaddr)(struct hci_dev *hdev, const bdaddr_t *bdaddr);
 661         void (*cmd_timeout)(struct hci_dev *hdev);
 662         bool (*wakeup)(struct hci_dev *hdev);
 663         int (*set_quality_report)(struct hci_dev *hdev, bool enable);
 664         int (*get_data_path_id)(struct hci_dev *hdev, __u8 *data_path);
 665         int (*get_codec_config_data)(struct hci_dev *hdev, __u8 type,
 666                                      struct bt_codec *codec, __u8 *vnd_len,
 667                                      __u8 **vnd_data);
 668 };
 669
 670 #define HCI_PHY_HANDLE(handle)  (handle & 0xff)
 671
 672 enum conn_reasons {
 673         CONN_REASON_PAIR_DEVICE,
 674         CONN_REASON_L2CAP_CHAN,
 675         CONN_REASON_SCO_CONNECT,
 676         CONN_REASON_ISO_CONNECT,
 677 };
 678
 679 struct hci_conn {
 680         struct list_head list;
 681
 682         atomic_t        refcnt;
 683
 684         bdaddr_t        dst;
 685         __u8            dst_type;
 686         bdaddr_t        src;
 687         __u8            src_type;
 688         bdaddr_t        init_addr;
 689         __u8            init_addr_type;
 690         bdaddr_t        resp_addr;
 691         __u8            resp_addr_type;
 692         __u8            adv_instance;
 693         __u16           handle;
 694         __u16           sync_handle;
 695         __u16           state;
 696         __u8            mode;
 697         __u8            type;
 698         __u8            role;
 699         bool            out;
 700         __u8            attempt;
 701         __u8            dev_class[3];
 702         __u8            features[HCI_MAX_PAGES][8];
 703         __u16           pkt_type;
 704         __u16           link_policy;
 705         __u8            key_type;
 706         __u8            auth_type;
 707         __u8            sec_level;
 708         __u8            pending_sec_level;
 709         __u8            pin_length;
 710         __u8            enc_key_size;
 711         __u8            io_capability;
 712         __u32           passkey_notify;
 713         __u8            passkey_entered;
 714         __u16           disc_timeout;
 715         __u16           conn_timeout;
 716         __u16           setting;
 717         __u16           auth_payload_timeout;
 718         __u16           le_conn_min_interval;
 719         __u16           le_conn_max_interval;
 720         __u16           le_conn_interval;
 721         __u16           le_conn_latency;
 722         __u16           le_supv_timeout;
 723         __u8            le_adv_data[HCI_MAX_AD_LENGTH];
 724         __u8            le_adv_data_len;
 725         __u8            le_per_adv_data[HCI_MAX_PER_AD_LENGTH];
 726         __u8            le_per_adv_data_len;
 727         __u8            le_tx_phy;
 728         __u8            le_rx_phy;
 729         __s8            rssi;
 730         __s8            tx_power;
 731         __s8            max_tx_power;
 732         struct bt_iso_qos iso_qos;
 733         unsigned long   flags;
 734
 735         enum conn_reasons conn_reason;
 736
 737         __u32           clock;
 738         __u16           clock_accuracy;
 739
 740         unsigned long   conn_info_timestamp;
 741
 742         __u8            remote_cap;
 743         __u8            remote_auth;
 744         __u8            remote_id;
 745
 746         unsigned int    sent;
 747
 748         struct sk_buff_head data_q;
 749         struct list_head chan_list;
 750
 751         struct delayed_work disc_work;
 752         struct delayed_work auto_accept_work;
 753         struct delayed_work idle_work;
 754         struct delayed_work le_conn_timeout;
 755         struct work_struct  le_scan_cleanup;
 756
 757         struct device   dev;
 758         struct dentry   *debugfs;
 759
 760         struct hci_dev  *hdev;
 761         void            *l2cap_data;
 762         void            *sco_data;
 763         void            *iso_data;
 764         struct amp_mgr  *amp_mgr;
 765
 766         struct hci_conn *link;
 767         struct bt_codec codec;
 768
 769         void (*connect_cfm_cb)  (struct hci_conn *conn, u8 status);
 770         void (*security_cfm_cb) (struct hci_conn *conn, u8 status);
 771         void (*disconn_cfm_cb)  (struct hci_conn *conn, u8 reason);
 772
 773         void (*cleanup)(struct hci_conn *conn);
 774 };
 775
 776 struct hci_chan {
 777         struct list_head list;
 778         __u16 handle;
 779         struct hci_conn *conn;
 780         struct sk_buff_head data_q;
 781         unsigned int    sent;
 782         __u8            state;
 783         bool            amp;
 784 };
 785
 786 struct hci_conn_params {
 787         struct list_head list;
 788         struct list_head action;
 789
 790         bdaddr_t addr;
 791         u8 addr_type;
 792
 793         u16 conn_min_interval;
 794         u16 conn_max_interval;
 795         u16 conn_latency;
 796         u16 supervision_timeout;
 797
 798         enum {
 799                 HCI_AUTO_CONN_DISABLED,
 800                 HCI_AUTO_CONN_REPORT,
 801                 HCI_AUTO_CONN_DIRECT,
 802                 HCI_AUTO_CONN_ALWAYS,
 803                 HCI_AUTO_CONN_LINK_LOSS,
 804                 HCI_AUTO_CONN_EXPLICIT,
 805         } auto_connect;
 806
 807         struct hci_conn *conn;
 808         bool explicit_connect;
 809         hci_conn_flags_t flags;
 810         u8  privacy_mode;
 811 };
 812
 813 extern struct list_head hci_dev_list;
 814 extern struct list_head hci_cb_list;
 815 extern rwlock_t hci_dev_list_lock;
 816 extern struct mutex hci_cb_list_lock;
 817
 818 #define hci_dev_set_flag(hdev, nr)             set_bit((nr), (hdev)->dev_flags)
 819 #define hci_dev_clear_flag(hdev, nr)           clear_bit((nr), (hdev)->dev_flags)
 820 #define hci_dev_change_flag(hdev, nr)          change_bit((nr), (hdev)->dev_flags)
 821 #define hci_dev_test_flag(hdev, nr)            test_bit((nr), (hdev)->dev_flags)
 822 #define hci_dev_test_and_set_flag(hdev, nr)    test_and_set_bit((nr), (hdev)->dev_flags)
 823 #define hci_dev_test_and_clear_flag(hdev, nr)  test_and_clear_bit((nr), (hdev)->dev_flags)
 824 #define hci_dev_test_and_change_flag(hdev, nr) test_and_change_bit((nr), (hdev)->dev_flags)
 825
 826 #define hci_dev_clear_volatile_flags(hdev)                      \
 827         do {                                                    \
 828                 hci_dev_clear_flag(hdev, HCI_LE_SCAN);          \
 829                 hci_dev_clear_flag(hdev, HCI_LE_ADV);           \
 830                 hci_dev_clear_flag(hdev, HCI_LL_RPA_RESOLUTION);\
 831                 hci_dev_clear_flag(hdev, HCI_PERIODIC_INQ);     \
 832                 hci_dev_clear_flag(hdev, HCI_QUALITY_REPORT);   \
 833         } while (0)
 834
 835 #define hci_dev_le_state_simultaneous(hdev) \
 836         (test_bit(HCI_QUIRK_VALID_LE_STATES, &hdev->quirks) && \
 837          (hdev->le_states[4] & 0x08) && /* Central */ \
 838          (hdev->le_states[4] & 0x40) && /* Peripheral */ \
 839          (hdev->le_states[3] & 0x10))   /* Simultaneous */
 840
 841 /* ----- HCI interface to upper protocols ----- */
 842 int l2cap_connect_ind(struct hci_dev *hdev, bdaddr_t *bdaddr);
 843 int l2cap_disconn_ind(struct hci_conn *hcon);
 844 void l2cap_recv_acldata(struct hci_conn *hcon, struct sk_buff *skb, u16 flags);
 845
 846 #if IS_ENABLED(CONFIG_BT_BREDR)
 847 int sco_connect_ind(struct hci_dev *hdev, bdaddr_t *bdaddr, __u8 *flags);
 848 void sco_recv_scodata(struct hci_conn *hcon, struct sk_buff *skb);
 849 #else
 850 static inline int sco_connect_ind(struct hci_dev *hdev, bdaddr_t *bdaddr,
 851                                   __u8 *flags)
 852 {
 853         return 0;
 854 }
 855
 856 static inline void sco_recv_scodata(struct hci_conn *hcon, struct sk_buff *skb)
 857 {
 858 }
 859 #endif
 860
 861 #if IS_ENABLED(CONFIG_BT_LE)
 862 int iso_connect_ind(struct hci_dev *hdev, bdaddr_t *bdaddr, __u8 *flags);
 863 void iso_recv(struct hci_conn *hcon, struct sk_buff *skb, u16 flags);
 864 #else
 865 static inline int iso_connect_ind(struct hci_dev *hdev, bdaddr_t *bdaddr,
 866                                   __u8 *flags)
 867 {
 868         return 0;
 869 }
 870 static inline void iso_recv(struct hci_conn *hcon, struct sk_buff *skb,
 871                             u16 flags)
 872 {
 873 }
 874 #endif
 875
 876 /* ----- Inquiry cache ----- */
 877 #define INQUIRY_CACHE_AGE_MAX   (HZ*30)   /* 30 seconds */
 878 #define INQUIRY_ENTRY_AGE_MAX   (HZ*60)   /* 60 seconds */
 879
 880 static inline void discovery_init(struct hci_dev *hdev)
 881 {
 882         hdev->discovery.state = DISCOVERY_STOPPED;
 883         INIT_LIST_HEAD(&hdev->discovery.all);
 884         INIT_LIST_HEAD(&hdev->discovery.unknown);
 885         INIT_LIST_HEAD(&hdev->discovery.resolve);
 886         hdev->discovery.report_invalid_rssi = true;
 887         hdev->discovery.rssi = HCI_RSSI_INVALID;
 888 }
 889
 890 static inline void hci_discovery_filter_clear(struct hci_dev *hdev)
 891 {
 892         hdev->discovery.result_filtering = false;
 893         hdev->discovery.report_invalid_rssi = true;
 894         hdev->discovery.rssi = HCI_RSSI_INVALID;
 895         hdev->discovery.uuid_count = 0;
 896         kfree(hdev->discovery.uuids);
 897         hdev->discovery.uuids = NULL;
 898         hdev->discovery.scan_start = 0;
 899         hdev->discovery.scan_duration = 0;
 900 }
 901
 902 bool hci_discovery_active(struct hci_dev *hdev);
 903
 904 void hci_discovery_set_state(struct hci_dev *hdev, int state);
 905
 906 static inline int inquiry_cache_empty(struct hci_dev *hdev)
 907 {
 908         return list_empty(&hdev->discovery.all);
 909 }
 910
 911 static inline long inquiry_cache_age(struct hci_dev *hdev)
 912 {
 913         struct discovery_state *c = &hdev->discovery;
 914         return jiffies - c->timestamp;
 915 }
 916
 917 static inline long inquiry_entry_age(struct inquiry_entry *e)
 918 {
 919         return jiffies - e->timestamp;
 920 }
 921
 922 struct inquiry_entry *hci_inquiry_cache_lookup(struct hci_dev *hdev,
 923                                                bdaddr_t *bdaddr);
 924 struct inquiry_entry *hci_inquiry_cache_lookup_unknown(struct hci_dev *hdev,
 925                                                        bdaddr_t *bdaddr);
 926 struct inquiry_entry *hci_inquiry_cache_lookup_resolve(struct hci_dev *hdev,
 927                                                        bdaddr_t *bdaddr,
 928                                                        int state);
 929 void hci_inquiry_cache_update_resolve(struct hci_dev *hdev,
 930                                       struct inquiry_entry *ie);
 931 u32 hci_inquiry_cache_update(struct hci_dev *hdev, struct inquiry_data *data,
 932                              bool name_known);
 933 void hci_inquiry_cache_flush(struct hci_dev *hdev);
 934
 935 /* ----- HCI Connections ----- */
 936 enum {
 937         HCI_CONN_AUTH_PEND,
 938         HCI_CONN_REAUTH_PEND,
 939         HCI_CONN_ENCRYPT_PEND,
 940         HCI_CONN_RSWITCH_PEND,
 941         HCI_CONN_MODE_CHANGE_PEND,
 942         HCI_CONN_SCO_SETUP_PEND,
 943         HCI_CONN_MGMT_CONNECTED,
 944         HCI_CONN_SSP_ENABLED,
 945         HCI_CONN_SC_ENABLED,
 946         HCI_CONN_AES_CCM,
 947         HCI_CONN_POWER_SAVE,
 948         HCI_CONN_FLUSH_KEY,
 949         HCI_CONN_ENCRYPT,
 950         HCI_CONN_AUTH,
 951         HCI_CONN_SECURE,
 952         HCI_CONN_FIPS,
 953         HCI_CONN_STK_ENCRYPT,
 954         HCI_CONN_AUTH_INITIATOR,
 955         HCI_CONN_DROP,
 956         HCI_CONN_PARAM_REMOVAL_PEND,
 957         HCI_CONN_NEW_LINK_KEY,
 958         HCI_CONN_SCANNING,
 959         HCI_CONN_AUTH_FAILURE,
 960         HCI_CONN_PER_ADV,
 961 };
 962
 963 static inline bool hci_conn_ssp_enabled(struct hci_conn *conn)
 964 {
 965         struct hci_dev *hdev = conn->hdev;
 966         return hci_dev_test_flag(hdev, HCI_SSP_ENABLED) &&
 967                test_bit(HCI_CONN_SSP_ENABLED, &conn->flags);
 968 }
 969
 970 static inline bool hci_conn_sc_enabled(struct hci_conn *conn)
 971 {
 972         struct hci_dev *hdev = conn->hdev;
 973         return hci_dev_test_flag(hdev, HCI_SC_ENABLED) &&
 974                test_bit(HCI_CONN_SC_ENABLED, &conn->flags);
 975 }
 976
 977 static inline void hci_conn_hash_add(struct hci_dev *hdev, struct hci_conn *c)
 978 {
 979         struct hci_conn_hash *h = &hdev->conn_hash;
 980         list_add_rcu(&c->list, &h->list);
 981         switch (c->type) {
 982         case ACL_LINK:
 983                 h->acl_num++;
 984                 break;
 985         case AMP_LINK:
 986                 h->amp_num++;
 987                 break;
 988         case LE_LINK:
 989                 h->le_num++;
 990                 if (c->role == HCI_ROLE_SLAVE)
 991                         h->le_num_peripheral++;
 992                 break;
 993         case SCO_LINK:
 994         case ESCO_LINK:
 995                 h->sco_num++;
 996                 break;
 997         case ISO_LINK:
 998                 h->iso_num++;
 999                 break;
1000         }
1001 }
1002
1003 static inline void hci_conn_hash_del(struct hci_dev *hdev, struct hci_conn *c)
1004 {
1005         struct hci_conn_hash *h = &hdev->conn_hash;
1006
1007         list_del_rcu(&c->list);
1008         synchronize_rcu();
1009
1010         switch (c->type) {
1011         case ACL_LINK:
1012                 h->acl_num--;
1013                 break;
1014         case AMP_LINK:
1015                 h->amp_num--;
1016                 break;
1017         case LE_LINK:
1018                 h->le_num--;
1019                 if (c->role == HCI_ROLE_SLAVE)
1020                         h->le_num_peripheral--;
1021                 break;
1022         case SCO_LINK:
1023         case ESCO_LINK:
1024                 h->sco_num--;
1025                 break;
1026         case ISO_LINK:
1027                 h->iso_num--;
1028                 break;
1029         }
1030 }
1031
1032 static inline unsigned int hci_conn_num(struct hci_dev *hdev, __u8 type)
1033 {
1034         struct hci_conn_hash *h = &hdev->conn_hash;
1035         switch (type) {
1036         case ACL_LINK:
1037                 return h->acl_num;
1038         case AMP_LINK:
1039                 return h->amp_num;
1040         case LE_LINK:
1041                 return h->le_num;
1042         case SCO_LINK:
1043         case ESCO_LINK:
1044                 return h->sco_num;
1045         case ISO_LINK:
1046                 return h->iso_num;
1047         default:
1048                 return 0;
1049         }
1050 }
1051
1052 static inline unsigned int hci_conn_count(struct hci_dev *hdev)
1053 {
1054         struct hci_conn_hash *c = &hdev->conn_hash;
1055
1056         return c->acl_num + c->amp_num + c->sco_num + c->le_num + c->iso_num;
1057 }
1058
1059 static inline __u8 hci_conn_lookup_type(struct hci_dev *hdev, __u16 handle)
1060 {
1061         struct hci_conn_hash *h = &hdev->conn_hash;
1062         struct hci_conn *c;
1063         __u8 type = INVALID_LINK;
1064
1065         rcu_read_lock();
1066
1067         list_for_each_entry_rcu(c, &h->list, list) {
1068                 if (c->handle == handle) {
1069                         type = c->type;
1070                         break;
1071                 }
1072         }
1073
1074         rcu_read_unlock();
1075
1076         return type;
1077 }
1078
1079 static inline struct hci_conn *hci_conn_hash_lookup_bis(struct hci_dev *hdev,
1080                                                         bdaddr_t *ba,
1081                                                         __u8 big, __u8 bis)
1082 {
1083         struct hci_conn_hash *h = &hdev->conn_hash;
1084         struct hci_conn  *c;
1085
1086         rcu_read_lock();
1087
1088         list_for_each_entry_rcu(c, &h->list, list) {
1089                 if (bacmp(&c->dst, ba) || c->type != ISO_LINK)
1090                         continue;
1091
1092                 if (c->iso_qos.big == big && c->iso_qos.bis == bis) {
1093                         rcu_read_unlock();
1094                         return c;
1095                 }
1096         }
1097         rcu_read_unlock();
1098
1099         return NULL;
1100 }
1101
1102 static inline struct hci_conn *hci_conn_hash_lookup_handle(struct hci_dev *hdev,
1103                                                                 __u16 handle)
1104 {
1105         struct hci_conn_hash *h = &hdev->conn_hash;
1106         struct hci_conn  *c;
1107
1108         rcu_read_lock();
1109
1110         list_for_each_entry_rcu(c, &h->list, list) {
1111                 if (c->handle == handle) {
1112                         rcu_read_unlock();
1113                         return c;
1114                 }
1115         }
1116         rcu_read_unlock();
1117
1118         return NULL;
1119 }
1120
1121 static inline struct hci_conn *hci_conn_hash_lookup_ba(struct hci_dev *hdev,
1122                                                         __u8 type, bdaddr_t *ba)
1123 {
1124         struct hci_conn_hash *h = &hdev->conn_hash;
1125         struct hci_conn  *c;
1126
1127         rcu_read_lock();
1128
1129         list_for_each_entry_rcu(c, &h->list, list) {
1130                 if (c->type == type && !bacmp(&c->dst, ba)) {
1131                         rcu_read_unlock();
1132                         return c;
1133                 }
1134         }
1135
1136         rcu_read_unlock();
1137
1138         return NULL;
1139 }
1140
1141 static inline struct hci_conn *hci_conn_hash_lookup_le(struct hci_dev *hdev,
1142                                                        bdaddr_t *ba,
1143                                                        __u8 ba_type)
1144 {
1145         struct hci_conn_hash *h = &hdev->conn_hash;
1146         struct hci_conn  *c;
1147
1148         rcu_read_lock();
1149
1150         list_for_each_entry_rcu(c, &h->list, list) {
1151                 if (c->type != LE_LINK)
1152                        continue;
1153
1154                 if (ba_type == c->dst_type && !bacmp(&c->dst, ba)) {
1155                         rcu_read_unlock();
1156                         return c;
1157                 }
1158         }
1159
1160         rcu_read_unlock();
1161
1162         return NULL;
1163 }
1164
1165 static inline struct hci_conn *hci_conn_hash_lookup_cis(struct hci_dev *hdev,
1166                                                         bdaddr_t *ba,
1167                                                         __u8 ba_type)
1168 {
1169         struct hci_conn_hash *h = &hdev->conn_hash;
1170         struct hci_conn  *c;
1171
1172         rcu_read_lock();
1173
1174         list_for_each_entry_rcu(c, &h->list, list) {
1175                 if (c->type != ISO_LINK)
1176                         continue;
1177
1178                 if (ba_type == c->dst_type && !bacmp(&c->dst, ba)) {
1179                         rcu_read_unlock();
1180                         return c;
1181                 }
1182         }
1183
1184         rcu_read_unlock();
1185
1186         return NULL;
1187 }
1188
1189 static inline struct hci_conn *hci_conn_hash_lookup_cig(struct hci_dev *hdev,
1190                                                         __u8 handle)
1191 {
1192         struct hci_conn_hash *h = &hdev->conn_hash;
1193         struct hci_conn  *c;
1194
1195         rcu_read_lock();
1196
1197         list_for_each_entry_rcu(c, &h->list, list) {
1198                 if (c->type != ISO_LINK)
1199                         continue;
1200
1201                 if (handle == c->iso_qos.cig) {
1202                         rcu_read_unlock();
1203                         return c;
1204                 }
1205         }
1206
1207         rcu_read_unlock();
1208
1209         return NULL;
1210 }
1211
1212 static inline struct hci_conn *hci_conn_hash_lookup_big(struct hci_dev *hdev,
1213                                                         __u8 handle)
1214 {
1215         struct hci_conn_hash *h = &hdev->conn_hash;
1216         struct hci_conn  *c;
1217
1218         rcu_read_lock();
1219
1220         list_for_each_entry_rcu(c, &h->list, list) {
1221                 if (bacmp(&c->dst, BDADDR_ANY) || c->type != ISO_LINK)
1222                         continue;
1223
1224                 if (handle == c->iso_qos.big) {
1225                         rcu_read_unlock();
1226                         return c;
1227                 }
1228         }
1229
1230         rcu_read_unlock();
1231
1232         return NULL;
1233 }
1234
1235 static inline struct hci_conn *hci_conn_hash_lookup_state(struct hci_dev *hdev,
1236                                                         __u8 type, __u16 state)
1237 {
1238         struct hci_conn_hash *h = &hdev->conn_hash;
1239         struct hci_conn  *c;
1240
1241         rcu_read_lock();
1242
1243         list_for_each_entry_rcu(c, &h->list, list) {
1244                 if (c->type == type && c->state == state) {
1245                         rcu_read_unlock();
1246                         return c;
1247                 }
1248         }
1249
1250         rcu_read_unlock();
1251
1252         return NULL;
1253 }
1254
1255 typedef void (*hci_conn_func_t)(struct hci_conn *conn, void *data);
1256 static inline void hci_conn_hash_list_state(struct hci_dev *hdev,
1257                                             hci_conn_func_t func, __u8 type,
1258                                             __u16 state, void *data)
1259 {
1260         struct hci_conn_hash *h = &hdev->conn_hash;
1261         struct hci_conn  *c;
1262
1263         if (!func)
1264                 return;
1265
1266         rcu_read_lock();
1267
1268         list_for_each_entry_rcu(c, &h->list, list) {
1269                 if (c->type == type && c->state == state)
1270                         func(c, data);
1271         }
1272
1273         rcu_read_unlock();
1274 }
1275
1276 static inline struct hci_conn *hci_lookup_le_connect(struct hci_dev *hdev)
1277 {
1278         struct hci_conn_hash *h = &hdev->conn_hash;
1279         struct hci_conn  *c;
1280
1281         rcu_read_lock();
1282
1283         list_for_each_entry_rcu(c, &h->list, list) {
1284                 if (c->type == LE_LINK && c->state == BT_CONNECT &&
1285                     !test_bit(HCI_CONN_SCANNING, &c->flags)) {
1286                         rcu_read_unlock();
1287                         return c;
1288                 }
1289         }
1290
1291         rcu_read_unlock();
1292
1293         return NULL;
1294 }
1295
1296 int hci_disconnect(struct hci_conn *conn, __u8 reason);
1297 bool hci_setup_sync(struct hci_conn *conn, __u16 handle);
1298 void hci_sco_setup(struct hci_conn *conn, __u8 status);
1299 bool hci_iso_setup_path(struct hci_conn *conn);
1300 int hci_le_create_cis(struct hci_conn *conn);
1301
1302 struct hci_conn *hci_conn_add(struct hci_dev *hdev, int type, bdaddr_t *dst,
1303                               u8 role);
1304 int hci_conn_del(struct hci_conn *conn);
1305 void hci_conn_hash_flush(struct hci_dev *hdev);
1306 void hci_conn_check_pending(struct hci_dev *hdev);
1307
1308 struct hci_chan *hci_chan_create(struct hci_conn *conn);
1309 void hci_chan_del(struct hci_chan *chan);
1310 void hci_chan_list_flush(struct hci_conn *conn);
1311 struct hci_chan *hci_chan_lookup_handle(struct hci_dev *hdev, __u16 handle);
1312
1313 struct hci_conn *hci_connect_le_scan(struct hci_dev *hdev, bdaddr_t *dst,
1314                                      u8 dst_type, u8 sec_level,
1315                                      u16 conn_timeout,
1316                                      enum conn_reasons conn_reason);
1317 struct hci_conn *hci_connect_le(struct hci_dev *hdev, bdaddr_t *dst,
1318                                 u8 dst_type, bool dst_resolved, u8 sec_level,
1319                                 u16 conn_timeout, u8 role);
1320 struct hci_conn *hci_connect_acl(struct hci_dev *hdev, bdaddr_t *dst,
1321                                  u8 sec_level, u8 auth_type,
1322                                  enum conn_reasons conn_reason);
1323 struct hci_conn *hci_connect_sco(struct hci_dev *hdev, int type, bdaddr_t *dst,
1324                                  __u16 setting, struct bt_codec *codec);
1325 struct hci_conn *hci_bind_cis(struct hci_dev *hdev, bdaddr_t *dst,
1326                               __u8 dst_type, struct bt_iso_qos *qos);
1327 struct hci_conn *hci_connect_cis(struct hci_dev *hdev, bdaddr_t *dst,
1328                                  __u8 dst_type, struct bt_iso_qos *qos);
1329 struct hci_conn *hci_connect_bis(struct hci_dev *hdev, bdaddr_t *dst,
1330                                  __u8 dst_type, struct bt_iso_qos *qos,
1331                                  __u8 data_len, __u8 *data);
1332 int hci_pa_create_sync(struct hci_dev *hdev, bdaddr_t *dst, __u8 dst_type,
1333                        __u8 sid);
1334 int hci_le_big_create_sync(struct hci_dev *hdev, struct bt_iso_qos *qos,
1335                            __u16 sync_handle, __u8 num_bis, __u8 bis[]);
1336 int hci_conn_check_link_mode(struct hci_conn *conn);
1337 int hci_conn_check_secure(struct hci_conn *conn, __u8 sec_level);
1338 int hci_conn_security(struct hci_conn *conn, __u8 sec_level, __u8 auth_type,
1339                       bool initiator);
1340 int hci_conn_switch_role(struct hci_conn *conn, __u8 role);
1341
1342 void hci_conn_enter_active_mode(struct hci_conn *conn, __u8 force_active);
1343
1344 void hci_conn_failed(struct hci_conn *conn, u8 status);
1345
1346 /*
1347  * hci_conn_get() and hci_conn_put() are used to control the life-time of an
1348  * "hci_conn" object. They do not guarantee that the hci_conn object is running,
1349  * working or anything else. They just guarantee that the object is available
1350  * and can be dereferenced. So you can use its locks, local variables and any
1351  * other constant data.
1352  * Before accessing runtime data, you _must_ lock the object and then check that
1353  * it is still running. As soon as you release the locks, the connection might
1354  * get dropped, though.
1355  *
1356  * On the other hand, hci_conn_hold() and hci_conn_drop() are used to control
1357  * how long the underlying connection is held. So every channel that runs on the
1358  * hci_conn object calls this to prevent the connection from disappearing. As
1359  * long as you hold a device, you must also guarantee that you have a valid
1360  * reference to the device via hci_conn_get() (or the initial reference from
1361  * hci_conn_add()).
1362  * The hold()/drop() ref-count is known to drop below 0 sometimes, which doesn't
1363  * break because nobody cares for that. But this means, we cannot use
1364  * _get()/_drop() in it, but require the caller to have a valid ref (FIXME).
1365  */
1366
1367 static inline struct hci_conn *hci_conn_get(struct hci_conn *conn)
1368 {
1369         get_device(&conn->dev);
1370         return conn;
1371 }
1372
1373 static inline void hci_conn_put(struct hci_conn *conn)
1374 {
1375         put_device(&conn->dev);
1376 }
1377
1378 static inline void hci_conn_hold(struct hci_conn *conn)
1379 {
1380         BT_DBG("hcon %p orig refcnt %d", conn, atomic_read(&conn->refcnt));
1381
1382         atomic_inc(&conn->refcnt);
1383         cancel_delayed_work(&conn->disc_work);
1384 }
1385
1386 static inline void hci_conn_drop(struct hci_conn *conn)
1387 {
1388         BT_DBG("hcon %p orig refcnt %d", conn, atomic_read(&conn->refcnt));
1389
1390         if (atomic_dec_and_test(&conn->refcnt)) {
1391                 unsigned long timeo;
1392
1393                 switch (conn->type) {
1394                 case ACL_LINK:
1395                 case LE_LINK:
1396                         cancel_delayed_work(&conn->idle_work);
1397                         if (conn->state == BT_CONNECTED) {
1398                                 timeo = conn->disc_timeout;
1399                                 if (!conn->out)
1400                                         timeo *= 2;
1401                         } else {
1402                                 timeo = 0;
1403                         }
1404                         break;
1405
1406                 case AMP_LINK:
1407                         timeo = conn->disc_timeout;
1408                         break;
1409
1410                 default:
1411                         timeo = 0;
1412                         break;
1413                 }
1414
1415                 cancel_delayed_work(&conn->disc_work);
1416                 queue_delayed_work(conn->hdev->workqueue,
1417                                    &conn->disc_work, timeo);
1418         }
1419 }
1420
1421 /* ----- HCI Devices ----- */
1422 static inline void hci_dev_put(struct hci_dev *d)
1423 {
1424         BT_DBG("%s orig refcnt %d", d->name,
1425                kref_read(&d->dev.kobj.kref));
1426
1427         put_device(&d->dev);
1428 }
1429
1430 static inline struct hci_dev *hci_dev_hold(struct hci_dev *d)
1431 {
1432         BT_DBG("%s orig refcnt %d", d->name,
1433                kref_read(&d->dev.kobj.kref));
1434
1435         get_device(&d->dev);
1436         return d;
1437 }
1438
1439 #define hci_dev_lock(d)         mutex_lock(&d->lock)
1440 #define hci_dev_unlock(d)       mutex_unlock(&d->lock)
1441
1442 #define to_hci_dev(d) container_of(d, struct hci_dev, dev)
1443 #define to_hci_conn(c) container_of(c, struct hci_conn, dev)
1444
1445 static inline void *hci_get_drvdata(struct hci_dev *hdev)
1446 {
1447         return dev_get_drvdata(&hdev->dev);
1448 }
1449
1450 static inline void hci_set_drvdata(struct hci_dev *hdev, void *data)
1451 {
1452         dev_set_drvdata(&hdev->dev, data);
1453 }
1454
1455 static inline void *hci_get_priv(struct hci_dev *hdev)
1456 {
1457         return (char *)hdev + sizeof(*hdev);
1458 }
1459
1460 struct hci_dev *hci_dev_get(int index);
1461 struct hci_dev *hci_get_route(bdaddr_t *dst, bdaddr_t *src, u8 src_type);
1462
1463 struct hci_dev *hci_alloc_dev_priv(int sizeof_priv);
1464
1465 static inline struct hci_dev *hci_alloc_dev(void)
1466 {
1467         return hci_alloc_dev_priv(0);
1468 }
1469
1470 void hci_free_dev(struct hci_dev *hdev);
1471 int hci_register_dev(struct hci_dev *hdev);
1472 void hci_unregister_dev(struct hci_dev *hdev);
1473 void hci_release_dev(struct hci_dev *hdev);
1474 int hci_register_suspend_notifier(struct hci_dev *hdev);
1475 int hci_unregister_suspend_notifier(struct hci_dev *hdev);
1476 int hci_suspend_dev(struct hci_dev *hdev);
1477 int hci_resume_dev(struct hci_dev *hdev);
1478 int hci_reset_dev(struct hci_dev *hdev);
1479 int hci_recv_frame(struct hci_dev *hdev, struct sk_buff *skb);
1480 int hci_recv_diag(struct hci_dev *hdev, struct sk_buff *skb);
1481 __printf(2, 3) void hci_set_hw_info(struct hci_dev *hdev, const char *fmt, ...);
1482 __printf(2, 3) void hci_set_fw_info(struct hci_dev *hdev, const char *fmt, ...);
1483
1484 static inline void hci_set_msft_opcode(struct hci_dev *hdev, __u16 opcode)
1485 {
1486 #if IS_ENABLED(CONFIG_BT_MSFTEXT)
1487         hdev->msft_opcode = opcode;
1488 #endif
1489 }
1490
1491 static inline void hci_set_aosp_capable(struct hci_dev *hdev)
1492 {
1493 #if IS_ENABLED(CONFIG_BT_AOSPEXT)
1494         hdev->aosp_capable = true;
1495 #endif
1496 }
1497
1498 int hci_dev_open(__u16 dev);
1499 int hci_dev_close(__u16 dev);
1500 int hci_dev_do_close(struct hci_dev *hdev);
1501 int hci_dev_reset(__u16 dev);
1502 int hci_dev_reset_stat(__u16 dev);
1503 int hci_dev_cmd(unsigned int cmd, void __user *arg);
1504 int hci_get_dev_list(void __user *arg);
1505 int hci_get_dev_info(void __user *arg);
1506 int hci_get_conn_list(void __user *arg);
1507 int hci_get_conn_info(struct hci_dev *hdev, void __user *arg);
1508 int hci_get_auth_info(struct hci_dev *hdev, void __user *arg);
1509 int hci_inquiry(void __user *arg);
1510
1511 struct bdaddr_list *hci_bdaddr_list_lookup(struct list_head *list,
1512                                            bdaddr_t *bdaddr, u8 type);
1513 struct bdaddr_list_with_irk *hci_bdaddr_list_lookup_with_irk(
1514                                     struct list_head *list, bdaddr_t *bdaddr,
1515                                     u8 type);
1516 struct bdaddr_list_with_flags *
1517 hci_bdaddr_list_lookup_with_flags(struct list_head *list, bdaddr_t *bdaddr,
1518                                   u8 type);
1519 int hci_bdaddr_list_add(struct list_head *list, bdaddr_t *bdaddr, u8 type);
1520 int hci_bdaddr_list_add_with_irk(struct list_head *list, bdaddr_t *bdaddr,
1521                                  u8 type, u8 *peer_irk, u8 *local_irk);
1522 int hci_bdaddr_list_add_with_flags(struct list_head *list, bdaddr_t *bdaddr,
1523                                    u8 type, u32 flags);
1524 int hci_bdaddr_list_del(struct list_head *list, bdaddr_t *bdaddr, u8 type);
1525 int hci_bdaddr_list_del_with_irk(struct list_head *list, bdaddr_t *bdaddr,
1526                                  u8 type);
1527 int hci_bdaddr_list_del_with_flags(struct list_head *list, bdaddr_t *bdaddr,
1528                                    u8 type);
1529 void hci_bdaddr_list_clear(struct list_head *list);
1530
1531 struct hci_conn_params *hci_conn_params_lookup(struct hci_dev *hdev,
1532                                                bdaddr_t *addr, u8 addr_type);
1533 struct hci_conn_params *hci_conn_params_add(struct hci_dev *hdev,
1534                                             bdaddr_t *addr, u8 addr_type);
1535 void hci_conn_params_del(struct hci_dev *hdev, bdaddr_t *addr, u8 addr_type);
1536 void hci_conn_params_clear_disabled(struct hci_dev *hdev);
1537
1538 struct hci_conn_params *hci_pend_le_action_lookup(struct list_head *list,
1539                                                   bdaddr_t *addr,
1540                                                   u8 addr_type);
1541
1542 void hci_uuids_clear(struct hci_dev *hdev);
1543
1544 void hci_link_keys_clear(struct hci_dev *hdev);
1545 struct link_key *hci_find_link_key(struct hci_dev *hdev, bdaddr_t *bdaddr);
1546 struct link_key *hci_add_link_key(struct hci_dev *hdev, struct hci_conn *conn,
1547                                   bdaddr_t *bdaddr, u8 *val, u8 type,
1548                                   u8 pin_len, bool *persistent);
1549 struct smp_ltk *hci_add_ltk(struct hci_dev *hdev, bdaddr_t *bdaddr,
1550                             u8 addr_type, u8 type, u8 authenticated,
1551                             u8 tk[16], u8 enc_size, __le16 ediv, __le64 rand);
1552 struct smp_ltk *hci_find_ltk(struct hci_dev *hdev, bdaddr_t *bdaddr,
1553                              u8 addr_type, u8 role);
1554 int hci_remove_ltk(struct hci_dev *hdev, bdaddr_t *bdaddr, u8 bdaddr_type);
1555 void hci_smp_ltks_clear(struct hci_dev *hdev);
1556 int hci_remove_link_key(struct hci_dev *hdev, bdaddr_t *bdaddr);
1557
1558 struct smp_irk *hci_find_irk_by_rpa(struct hci_dev *hdev, bdaddr_t *rpa);
1559 struct smp_irk *hci_find_irk_by_addr(struct hci_dev *hdev, bdaddr_t *bdaddr,
1560                                      u8 addr_type);
1561 struct smp_irk *hci_add_irk(struct hci_dev *hdev, bdaddr_t *bdaddr,
1562                             u8 addr_type, u8 val[16], bdaddr_t *rpa);
1563 void hci_remove_irk(struct hci_dev *hdev, bdaddr_t *bdaddr, u8 addr_type);
1564 bool hci_is_blocked_key(struct hci_dev *hdev, u8 type, u8 val[16]);
1565 void hci_blocked_keys_clear(struct hci_dev *hdev);
1566 void hci_smp_irks_clear(struct hci_dev *hdev);
1567
1568 bool hci_bdaddr_is_paired(struct hci_dev *hdev, bdaddr_t *bdaddr, u8 type);
1569
1570 void hci_remote_oob_data_clear(struct hci_dev *hdev);
1571 struct oob_data *hci_find_remote_oob_data(struct hci_dev *hdev,
1572                                           bdaddr_t *bdaddr, u8 bdaddr_type);
1573 int hci_add_remote_oob_data(struct hci_dev *hdev, bdaddr_t *bdaddr,
1574                             u8 bdaddr_type, u8 *hash192, u8 *rand192,
1575                             u8 *hash256, u8 *rand256);
1576 int hci_remove_remote_oob_data(struct hci_dev *hdev, bdaddr_t *bdaddr,
1577                                u8 bdaddr_type);
1578
1579 void hci_adv_instances_clear(struct hci_dev *hdev);
1580 struct adv_info *hci_find_adv_instance(struct hci_dev *hdev, u8 instance);
1581 struct adv_info *hci_get_next_instance(struct hci_dev *hdev, u8 instance);
1582 struct adv_info *hci_add_adv_instance(struct hci_dev *hdev, u8 instance,
1583                                       u32 flags, u16 adv_data_len, u8 *adv_data,
1584                                       u16 scan_rsp_len, u8 *scan_rsp_data,
1585                                       u16 timeout, u16 duration, s8 tx_power,
1586                                       u32 min_interval, u32 max_interval,
1587                                       u8 mesh_handle);
1588 struct adv_info *hci_add_per_instance(struct hci_dev *hdev, u8 instance,
1589                                       u32 flags, u8 data_len, u8 *data,
1590                                       u32 min_interval, u32 max_interval);
1591 int hci_set_adv_instance_data(struct hci_dev *hdev, u8 instance,
1592                          u16 adv_data_len, u8 *adv_data,
1593                          u16 scan_rsp_len, u8 *scan_rsp_data);
1594 int hci_remove_adv_instance(struct hci_dev *hdev, u8 instance);
1595 void hci_adv_instances_set_rpa_expired(struct hci_dev *hdev, bool rpa_expired);
1596 u32 hci_adv_instance_flags(struct hci_dev *hdev, u8 instance);
1597 bool hci_adv_instance_is_scannable(struct hci_dev *hdev, u8 instance);
1598
1599 void hci_adv_monitors_clear(struct hci_dev *hdev);
1600 void hci_free_adv_monitor(struct hci_dev *hdev, struct adv_monitor *monitor);
1601 int hci_add_adv_monitor(struct hci_dev *hdev, struct adv_monitor *monitor);
1602 int hci_remove_single_adv_monitor(struct hci_dev *hdev, u16 handle);
1603 int hci_remove_all_adv_monitor(struct hci_dev *hdev);
1604 bool hci_is_adv_monitoring(struct hci_dev *hdev);
1605 int hci_get_adv_monitor_offload_ext(struct hci_dev *hdev);
1606
1607 void hci_event_packet(struct hci_dev *hdev, struct sk_buff *skb);
1608
1609 void hci_init_sysfs(struct hci_dev *hdev);
1610 void hci_conn_init_sysfs(struct hci_conn *conn);
1611 void hci_conn_add_sysfs(struct hci_conn *conn);
1612 void hci_conn_del_sysfs(struct hci_conn *conn);
1613
1614 #define SET_HCIDEV_DEV(hdev, pdev) ((hdev)->dev.parent = (pdev))
1615
1616 /* ----- LMP capabilities ----- */
1617 #define lmp_encrypt_capable(dev)   ((dev)->features[0][0] & LMP_ENCRYPT)
1618 #define lmp_rswitch_capable(dev)   ((dev)->features[0][0] & LMP_RSWITCH)
1619 #define lmp_hold_capable(dev)      ((dev)->features[0][0] & LMP_HOLD)
1620 #define lmp_sniff_capable(dev)     ((dev)->features[0][0] & LMP_SNIFF)
1621 #define lmp_park_capable(dev)      ((dev)->features[0][1] & LMP_PARK)
1622 #define lmp_inq_rssi_capable(dev)  ((dev)->features[0][3] & LMP_RSSI_INQ)
1623 #define lmp_esco_capable(dev)      ((dev)->features[0][3] & LMP_ESCO)
1624 #define lmp_bredr_capable(dev)     (!((dev)->features[0][4] & LMP_NO_BREDR))
1625 #define lmp_le_capable(dev)        ((dev)->features[0][4] & LMP_LE)
1626 #define lmp_sniffsubr_capable(dev) ((dev)->features[0][5] & LMP_SNIFF_SUBR)
1627 #define lmp_pause_enc_capable(dev) ((dev)->features[0][5] & LMP_PAUSE_ENC)
1628 #define lmp_esco_2m_capable(dev)   ((dev)->features[0][5] & LMP_EDR_ESCO_2M)
1629 #define lmp_ext_inq_capable(dev)   ((dev)->features[0][6] & LMP_EXT_INQ)
1630 #define lmp_le_br_capable(dev)     (!!((dev)->features[0][6] & LMP_SIMUL_LE_BR))
1631 #define lmp_ssp_capable(dev)       ((dev)->features[0][6] & LMP_SIMPLE_PAIR)
1632 #define lmp_no_flush_capable(dev)  ((dev)->features[0][6] & LMP_NO_FLUSH)
1633 #define lmp_lsto_capable(dev)      ((dev)->features[0][7] & LMP_LSTO)
1634 #define lmp_inq_tx_pwr_capable(dev) ((dev)->features[0][7] & LMP_INQ_TX_PWR)
1635 #define lmp_ext_feat_capable(dev)  ((dev)->features[0][7] & LMP_EXTFEATURES)
1636 #define lmp_transp_capable(dev)    ((dev)->features[0][2] & LMP_TRANSPARENT)
1637 #define lmp_edr_2m_capable(dev)    ((dev)->features[0][3] & LMP_EDR_2M)
1638 #define lmp_edr_3m_capable(dev)    ((dev)->features[0][3] & LMP_EDR_3M)
1639 #define lmp_edr_3slot_capable(dev) ((dev)->features[0][4] & LMP_EDR_3SLOT)
1640 #define lmp_edr_5slot_capable(dev) ((dev)->features[0][5] & LMP_EDR_5SLOT)
1641
1642 /* ----- Extended LMP capabilities ----- */
1643 #define lmp_cpb_central_capable(dev) ((dev)->features[2][0] & LMP_CPB_CENTRAL)
1644 #define lmp_cpb_peripheral_capable(dev) ((dev)->features[2][0] & LMP_CPB_PERIPHERAL)
1645 #define lmp_sync_train_capable(dev) ((dev)->features[2][0] & LMP_SYNC_TRAIN)
1646 #define lmp_sync_scan_capable(dev)  ((dev)->features[2][0] & LMP_SYNC_SCAN)
1647 #define lmp_sc_capable(dev)         ((dev)->features[2][1] & LMP_SC)
1648 #define lmp_ping_capable(dev)       ((dev)->features[2][1] & LMP_PING)
1649
1650 /* ----- Host capabilities ----- */
1651 #define lmp_host_ssp_capable(dev)  ((dev)->features[1][0] & LMP_HOST_SSP)
1652 #define lmp_host_sc_capable(dev)   ((dev)->features[1][0] & LMP_HOST_SC)
1653 #define lmp_host_le_capable(dev)   (!!((dev)->features[1][0] & LMP_HOST_LE))
1654 #define lmp_host_le_br_capable(dev) (!!((dev)->features[1][0] & LMP_HOST_LE_BREDR))
1655
1656 #define hdev_is_powered(dev)   (test_bit(HCI_UP, &(dev)->flags) && \
1657                                 !hci_dev_test_flag(dev, HCI_AUTO_OFF))
1658 #define bredr_sc_enabled(dev)  (lmp_sc_capable(dev) && \
1659                                 hci_dev_test_flag(dev, HCI_SC_ENABLED))
1660 #define rpa_valid(dev)         (bacmp(&dev->rpa, BDADDR_ANY) && \
1661                                 !hci_dev_test_flag(dev, HCI_RPA_EXPIRED))
1662 #define adv_rpa_valid(adv)     (bacmp(&adv->random_addr, BDADDR_ANY) && \
1663                                 !adv->rpa_expired)
1664
1665 #define scan_1m(dev) (((dev)->le_tx_def_phys & HCI_LE_SET_PHY_1M) || \
1666                       ((dev)->le_rx_def_phys & HCI_LE_SET_PHY_1M))
1667
1668 #define scan_2m(dev) (((dev)->le_tx_def_phys & HCI_LE_SET_PHY_2M) || \
1669                       ((dev)->le_rx_def_phys & HCI_LE_SET_PHY_2M))
1670
1671 #define scan_coded(dev) (((dev)->le_tx_def_phys & HCI_LE_SET_PHY_CODED) || \
1672                          ((dev)->le_rx_def_phys & HCI_LE_SET_PHY_CODED))
1673
1674 #define ll_privacy_capable(dev) ((dev)->le_features[0] & HCI_LE_LL_PRIVACY)
1675
1676 /* Use LL Privacy based address resolution if supported */
1677 #define use_ll_privacy(dev) (ll_privacy_capable(dev) && \
1678                              hci_dev_test_flag(dev, HCI_ENABLE_LL_PRIVACY))
1679
1680 #define privacy_mode_capable(dev) (use_ll_privacy(dev) && \
1681                                    (hdev->commands[39] & 0x04))
1682
1683 /* Use enhanced synchronous connection if command is supported and its quirk
1684  * has not been set.
1685  */
1686 #define enhanced_sync_conn_capable(dev) \
1687         (((dev)->commands[29] & 0x08) && \
1688          !test_bit(HCI_QUIRK_BROKEN_ENHANCED_SETUP_SYNC_CONN, &(dev)->quirks))
1689
1690 /* Use ext scanning if set ext scan param and ext scan enable is supported */
1691 #define use_ext_scan(dev) (((dev)->commands[37] & 0x20) && \
1692                            ((dev)->commands[37] & 0x40) && \
1693                            !test_bit(HCI_QUIRK_BROKEN_EXT_SCAN, &(dev)->quirks))
1694
1695 /* Use ext create connection if command is supported */
1696 #define use_ext_conn(dev) ((dev)->commands[37] & 0x80)
1697
1698 /* Extended advertising support */
1699 #define ext_adv_capable(dev) (((dev)->le_features[1] & HCI_LE_EXT_ADV))
1700
1701 /* BLUETOOTH CORE SPECIFICATION Version 5.3 | Vol 4, Part E page 1789:
1702  *
1703  * C24: Mandatory if the LE Controller supports Connection State and either
1704  * LE Feature (LL Privacy) or LE Feature (Extended Advertising) is supported
1705  */
1706 #define use_enhanced_conn_complete(dev) (ll_privacy_capable(dev) || \
1707                                          ext_adv_capable(dev))
1708
1709 /* Periodic advertising support */
1710 #define per_adv_capable(dev) (((dev)->le_features[1] & HCI_LE_PERIODIC_ADV))
1711
1712 /* CIS Master/Slave and BIS support */
1713 #define iso_capable(dev) (cis_capable(dev) || bis_capable(dev))
1714 #define cis_capable(dev) \
1715         (cis_central_capable(dev) || cis_peripheral_capable(dev))
1716 #define cis_central_capable(dev) \
1717         ((dev)->le_features[3] & HCI_LE_CIS_CENTRAL)
1718 #define cis_peripheral_capable(dev) \
1719         ((dev)->le_features[3] & HCI_LE_CIS_PERIPHERAL)
1720 #define bis_capable(dev) ((dev)->le_features[3] & HCI_LE_ISO_BROADCASTER)
1721
1722 /* ----- HCI protocols ----- */
1723 #define HCI_PROTO_DEFER             0x01
1724
1725 static inline int hci_proto_connect_ind(struct hci_dev *hdev, bdaddr_t *bdaddr,
1726                                         __u8 type, __u8 *flags)
1727 {
1728         switch (type) {
1729         case ACL_LINK:
1730                 return l2cap_connect_ind(hdev, bdaddr);
1731
1732         case SCO_LINK:
1733         case ESCO_LINK:
1734                 return sco_connect_ind(hdev, bdaddr, flags);
1735
1736         case ISO_LINK:
1737                 return iso_connect_ind(hdev, bdaddr, flags);
1738
1739         default:
1740                 BT_ERR("unknown link type %d", type);
1741                 return -EINVAL;
1742         }
1743 }
1744
1745 static inline int hci_proto_disconn_ind(struct hci_conn *conn)
1746 {
1747         if (conn->type != ACL_LINK && conn->type != LE_LINK)
1748                 return HCI_ERROR_REMOTE_USER_TERM;
1749
1750         return l2cap_disconn_ind(conn);
1751 }
1752
1753 /* ----- HCI callbacks ----- */
1754 struct hci_cb {
1755         struct list_head list;
1756
1757         char *name;
1758
1759         void (*connect_cfm)     (struct hci_conn *conn, __u8 status);
1760         void (*disconn_cfm)     (struct hci_conn *conn, __u8 status);
1761         void (*security_cfm)    (struct hci_conn *conn, __u8 status,
1762                                                                 __u8 encrypt);
1763         void (*key_change_cfm)  (struct hci_conn *conn, __u8 status);
1764         void (*role_switch_cfm) (struct hci_conn *conn, __u8 status, __u8 role);
1765 };
1766
1767 static inline void hci_connect_cfm(struct hci_conn *conn, __u8 status)
1768 {
1769         struct hci_cb *cb;
1770
1771         mutex_lock(&hci_cb_list_lock);
1772         list_for_each_entry(cb, &hci_cb_list, list) {
1773                 if (cb->connect_cfm)
1774                         cb->connect_cfm(conn, status);
1775         }
1776         mutex_unlock(&hci_cb_list_lock);
1777
1778         if (conn->connect_cfm_cb)
1779                 conn->connect_cfm_cb(conn, status);
1780 }
1781
1782 static inline void hci_disconn_cfm(struct hci_conn *conn, __u8 reason)
1783 {
1784         struct hci_cb *cb;
1785
1786         mutex_lock(&hci_cb_list_lock);
1787         list_for_each_entry(cb, &hci_cb_list, list) {
1788                 if (cb->disconn_cfm)
1789                         cb->disconn_cfm(conn, reason);
1790         }
1791         mutex_unlock(&hci_cb_list_lock);
1792
1793         if (conn->disconn_cfm_cb)
1794                 conn->disconn_cfm_cb(conn, reason);
1795 }
1796
1797 static inline void hci_auth_cfm(struct hci_conn *conn, __u8 status)
1798 {
1799         struct hci_cb *cb;
1800         __u8 encrypt;
1801
1802         if (test_bit(HCI_CONN_ENCRYPT_PEND, &conn->flags))
1803                 return;
1804
1805         encrypt = test_bit(HCI_CONN_ENCRYPT, &conn->flags) ? 0x01 : 0x00;
1806
1807         mutex_lock(&hci_cb_list_lock);
1808         list_for_each_entry(cb, &hci_cb_list, list) {
1809                 if (cb->security_cfm)
1810                         cb->security_cfm(conn, status, encrypt);
1811         }
1812         mutex_unlock(&hci_cb_list_lock);
1813
1814         if (conn->security_cfm_cb)
1815                 conn->security_cfm_cb(conn, status);
1816 }
1817
1818 static inline void hci_encrypt_cfm(struct hci_conn *conn, __u8 status)
1819 {
1820         struct hci_cb *cb;
1821         __u8 encrypt;
1822
1823         if (conn->state == BT_CONFIG) {
1824                 if (!status)
1825                         conn->state = BT_CONNECTED;
1826
1827                 hci_connect_cfm(conn, status);
1828                 hci_conn_drop(conn);
1829                 return;
1830         }
1831
1832         if (!test_bit(HCI_CONN_ENCRYPT, &conn->flags))
1833                 encrypt = 0x00;
1834         else if (test_bit(HCI_CONN_AES_CCM, &conn->flags))
1835                 encrypt = 0x02;
1836         else
1837                 encrypt = 0x01;
1838
1839         if (!status) {
1840                 if (conn->sec_level == BT_SECURITY_SDP)
1841                         conn->sec_level = BT_SECURITY_LOW;
1842
1843                 if (conn->pending_sec_level > conn->sec_level)
1844                         conn->sec_level = conn->pending_sec_level;
1845         }
1846
1847         mutex_lock(&hci_cb_list_lock);
1848         list_for_each_entry(cb, &hci_cb_list, list) {
1849                 if (cb->security_cfm)
1850                         cb->security_cfm(conn, status, encrypt);
1851         }
1852         mutex_unlock(&hci_cb_list_lock);
1853
1854         if (conn->security_cfm_cb)
1855                 conn->security_cfm_cb(conn, status);
1856 }
1857
1858 static inline void hci_key_change_cfm(struct hci_conn *conn, __u8 status)
1859 {
1860         struct hci_cb *cb;
1861
1862         mutex_lock(&hci_cb_list_lock);
1863         list_for_each_entry(cb, &hci_cb_list, list) {
1864                 if (cb->key_change_cfm)
1865                         cb->key_change_cfm(conn, status);
1866         }
1867         mutex_unlock(&hci_cb_list_lock);
1868 }
1869
1870 static inline void hci_role_switch_cfm(struct hci_conn *conn, __u8 status,
1871                                                                 __u8 role)
1872 {
1873         struct hci_cb *cb;
1874
1875         mutex_lock(&hci_cb_list_lock);
1876         list_for_each_entry(cb, &hci_cb_list, list) {
1877                 if (cb->role_switch_cfm)
1878                         cb->role_switch_cfm(conn, status, role);
1879         }
1880         mutex_unlock(&hci_cb_list_lock);
1881 }
1882
1883 static inline bool hci_bdaddr_is_rpa(bdaddr_t *bdaddr, u8 addr_type)
1884 {
1885         if (addr_type != ADDR_LE_DEV_RANDOM)
1886                 return false;
1887
1888         if ((bdaddr->b[5] & 0xc0) == 0x40)
1889                return true;
1890
1891         return false;
1892 }
1893
1894 static inline bool hci_is_identity_address(bdaddr_t *addr, u8 addr_type)
1895 {
1896         if (addr_type == ADDR_LE_DEV_PUBLIC)
1897                 return true;
1898
1899         /* Check for Random Static address type */
1900         if ((addr->b[5] & 0xc0) == 0xc0)
1901                 return true;
1902
1903         return false;
1904 }
1905
1906 static inline struct smp_irk *hci_get_irk(struct hci_dev *hdev,
1907                                           bdaddr_t *bdaddr, u8 addr_type)
1908 {
1909         if (!hci_bdaddr_is_rpa(bdaddr, addr_type))
1910                 return NULL;
1911
1912         return hci_find_irk_by_rpa(hdev, bdaddr);
1913 }
1914
1915 static inline int hci_check_conn_params(u16 min, u16 max, u16 latency,
1916                                         u16 to_multiplier)
1917 {
1918         u16 max_latency;
1919
1920         if (min > max || min < 6 || max > 3200)
1921                 return -EINVAL;
1922
1923         if (to_multiplier < 10 || to_multiplier > 3200)
1924                 return -EINVAL;
1925
1926         if (max >= to_multiplier * 8)
1927                 return -EINVAL;
1928
1929         max_latency = (to_multiplier * 4 / max) - 1;
1930         if (latency > 499 || latency > max_latency)
1931                 return -EINVAL;
1932
1933         return 0;
1934 }
1935
1936 int hci_register_cb(struct hci_cb *hcb);
1937 int hci_unregister_cb(struct hci_cb *hcb);
1938
1939 int __hci_cmd_send(struct hci_dev *hdev, u16 opcode, u32 plen,
1940                    const void *param);
1941
1942 int hci_send_cmd(struct hci_dev *hdev, __u16 opcode, __u32 plen,
1943                  const void *param);
1944 void hci_send_acl(struct hci_chan *chan, struct sk_buff *skb, __u16 flags);
1945 void hci_send_sco(struct hci_conn *conn, struct sk_buff *skb);
1946 void hci_send_iso(struct hci_conn *conn, struct sk_buff *skb);
1947
1948 void *hci_sent_cmd_data(struct hci_dev *hdev, __u16 opcode);
1949 void *hci_recv_event_data(struct hci_dev *hdev, __u8 event);
1950
1951 u32 hci_conn_get_phy(struct hci_conn *conn);
1952
1953 /* ----- HCI Sockets ----- */
1954 void hci_send_to_sock(struct hci_dev *hdev, struct sk_buff *skb);
1955 void hci_send_to_channel(unsigned short channel, struct sk_buff *skb,
1956                          int flag, struct sock *skip_sk);
1957 void hci_send_to_monitor(struct hci_dev *hdev, struct sk_buff *skb);
1958 void hci_send_monitor_ctrl_event(struct hci_dev *hdev, u16 event,
1959                                  void *data, u16 data_len, ktime_t tstamp,
1960                                  int flag, struct sock *skip_sk);
1961
1962 void hci_sock_dev_event(struct hci_dev *hdev, int event);
1963
1964 #define HCI_MGMT_VAR_LEN        BIT(0)
1965 #define HCI_MGMT_NO_HDEV        BIT(1)
1966 #define HCI_MGMT_UNTRUSTED      BIT(2)
1967 #define HCI_MGMT_UNCONFIGURED   BIT(3)
1968 #define HCI_MGMT_HDEV_OPTIONAL  BIT(4)
1969
1970 struct hci_mgmt_handler {
1971         int (*func) (struct sock *sk, struct hci_dev *hdev, void *data,
1972                      u16 data_len);
1973         size_t data_len;
1974         unsigned long flags;
1975 };
1976
1977 struct hci_mgmt_chan {
1978         struct list_head list;
1979         unsigned short channel;
1980         size_t handler_count;
1981         const struct hci_mgmt_handler *handlers;
1982         void (*hdev_init) (struct sock *sk, struct hci_dev *hdev);
1983 };
1984
1985 int hci_mgmt_chan_register(struct hci_mgmt_chan *c);
1986 void hci_mgmt_chan_unregister(struct hci_mgmt_chan *c);
1987
1988 /* Management interface */
1989 #define DISCOV_TYPE_BREDR               (BIT(BDADDR_BREDR))
1990 #define DISCOV_TYPE_LE                  (BIT(BDADDR_LE_PUBLIC) | \
1991                                          BIT(BDADDR_LE_RANDOM))
1992 #define DISCOV_TYPE_INTERLEAVED         (BIT(BDADDR_BREDR) | \
1993                                          BIT(BDADDR_LE_PUBLIC) | \
1994                                          BIT(BDADDR_LE_RANDOM))
1995
1996 /* These LE scan and inquiry parameters were chosen according to LE General
1997  * Discovery Procedure specification.
1998  */
1999 #define DISCOV_LE_SCAN_WIN              0x12
2000 #define DISCOV_LE_SCAN_INT              0x12
2001 #define DISCOV_LE_TIMEOUT               10240   /* msec */
2002 #define DISCOV_INTERLEAVED_TIMEOUT      5120    /* msec */
2003 #define DISCOV_INTERLEAVED_INQUIRY_LEN  0x04
2004 #define DISCOV_BREDR_INQUIRY_LEN        0x08
2005 #define DISCOV_LE_RESTART_DELAY         msecs_to_jiffies(200)   /* msec */
2006 #define DISCOV_LE_FAST_ADV_INT_MIN      0x00A0  /* 100 msec */
2007 #define DISCOV_LE_FAST_ADV_INT_MAX      0x00F0  /* 150 msec */
2008 #define DISCOV_LE_PER_ADV_INT_MIN       0x00A0  /* 200 msec */
2009 #define DISCOV_LE_PER_ADV_INT_MAX       0x00A0  /* 200 msec */
2010 #define DISCOV_LE_ADV_MESH_MIN          0x00A0  /* 100 msec */
2011 #define DISCOV_LE_ADV_MESH_MAX          0x00A0  /* 100 msec */
2012 #define INTERVAL_TO_MS(x)               (((x) * 10) / 0x10)
2013
2014 #define NAME_RESOLVE_DURATION           msecs_to_jiffies(10240) /* 10.24 sec */
2015
2016 void mgmt_fill_version_info(void *ver);
2017 int mgmt_new_settings(struct hci_dev *hdev);
2018 void mgmt_index_added(struct hci_dev *hdev);
2019 void mgmt_index_removed(struct hci_dev *hdev);
2020 void mgmt_set_powered_failed(struct hci_dev *hdev, int err);
2021 void mgmt_power_on(struct hci_dev *hdev, int err);
2022 void __mgmt_power_off(struct hci_dev *hdev);
2023 void mgmt_new_link_key(struct hci_dev *hdev, struct link_key *key,
2024                        bool persistent);
2025 void mgmt_device_connected(struct hci_dev *hdev, struct hci_conn *conn,
2026                            u8 *name, u8 name_len);
2027 void mgmt_device_disconnected(struct hci_dev *hdev, bdaddr_t *bdaddr,
2028                               u8 link_type, u8 addr_type, u8 reason,
2029                               bool mgmt_connected);
2030 void mgmt_disconnect_failed(struct hci_dev *hdev, bdaddr_t *bdaddr,
2031                             u8 link_type, u8 addr_type, u8 status);
2032 void mgmt_connect_failed(struct hci_dev *hdev, bdaddr_t *bdaddr, u8 link_type,
2033                          u8 addr_type, u8 status);
2034 void mgmt_pin_code_request(struct hci_dev *hdev, bdaddr_t *bdaddr, u8 secure);
2035 void mgmt_pin_code_reply_complete(struct hci_dev *hdev, bdaddr_t *bdaddr,
2036                                   u8 status);
2037 void mgmt_pin_code_neg_reply_complete(struct hci_dev *hdev, bdaddr_t *bdaddr,
2038                                       u8 status);
2039 int mgmt_user_confirm_request(struct hci_dev *hdev, bdaddr_t *bdaddr,
2040                               u8 link_type, u8 addr_type, u32 value,
2041                               u8 confirm_hint);
2042 int mgmt_user_confirm_reply_complete(struct hci_dev *hdev, bdaddr_t *bdaddr,
2043                                      u8 link_type, u8 addr_type, u8 status);
2044 int mgmt_user_confirm_neg_reply_complete(struct hci_dev *hdev, bdaddr_t *bdaddr,
2045                                          u8 link_type, u8 addr_type, u8 status);
2046 int mgmt_user_passkey_request(struct hci_dev *hdev, bdaddr_t *bdaddr,
2047                               u8 link_type, u8 addr_type);
2048 int mgmt_user_passkey_reply_complete(struct hci_dev *hdev, bdaddr_t *bdaddr,
2049                                      u8 link_type, u8 addr_type, u8 status);
2050 int mgmt_user_passkey_neg_reply_complete(struct hci_dev *hdev, bdaddr_t *bdaddr,
2051                                          u8 link_type, u8 addr_type, u8 status);
2052 int mgmt_user_passkey_notify(struct hci_dev *hdev, bdaddr_t *bdaddr,
2053                              u8 link_type, u8 addr_type, u32 passkey,
2054                              u8 entered);
2055 void mgmt_auth_failed(struct hci_conn *conn, u8 status);
2056 void mgmt_auth_enable_complete(struct hci_dev *hdev, u8 status);
2057 void mgmt_set_class_of_dev_complete(struct hci_dev *hdev, u8 *dev_class,
2058                                     u8 status);
2059 void mgmt_set_local_name_complete(struct hci_dev *hdev, u8 *name, u8 status);
2060 void mgmt_start_discovery_complete(struct hci_dev *hdev, u8 status);
2061 void mgmt_stop_discovery_complete(struct hci_dev *hdev, u8 status);
2062 void mgmt_device_found(struct hci_dev *hdev, bdaddr_t *bdaddr, u8 link_type,
2063                        u8 addr_type, u8 *dev_class, s8 rssi, u32 flags,
2064                        u8 *eir, u16 eir_len, u8 *scan_rsp, u8 scan_rsp_len,
2065                        u64 instant);
2066 void mgmt_remote_name(struct hci_dev *hdev, bdaddr_t *bdaddr, u8 link_type,
2067                       u8 addr_type, s8 rssi, u8 *name, u8 name_len);
2068 void mgmt_discovering(struct hci_dev *hdev, u8 discovering);
2069 void mgmt_suspending(struct hci_dev *hdev, u8 state);
2070 void mgmt_resuming(struct hci_dev *hdev, u8 reason, bdaddr_t *bdaddr,
2071                    u8 addr_type);
2072 bool mgmt_powering_down(struct hci_dev *hdev);
2073 void mgmt_new_ltk(struct hci_dev *hdev, struct smp_ltk *key, bool persistent);
2074 void mgmt_new_irk(struct hci_dev *hdev, struct smp_irk *irk, bool persistent);
2075 void mgmt_new_csrk(struct hci_dev *hdev, struct smp_csrk *csrk,
2076                    bool persistent);
2077 void mgmt_new_conn_param(struct hci_dev *hdev, bdaddr_t *bdaddr,
2078                          u8 bdaddr_type, u8 store_hint, u16 min_interval,
2079                          u16 max_interval, u16 latency, u16 timeout);
2080 void mgmt_smp_complete(struct hci_conn *conn, bool complete);
2081 bool mgmt_get_connectable(struct hci_dev *hdev);
2082 u8 mgmt_get_adv_discov_flags(struct hci_dev *hdev);
2083 void mgmt_advertising_added(struct sock *sk, struct hci_dev *hdev,
2084                             u8 instance);
2085 void mgmt_advertising_removed(struct sock *sk, struct hci_dev *hdev,
2086                               u8 instance);
2087 void mgmt_adv_monitor_removed(struct hci_dev *hdev, u16 handle);
2088 int mgmt_phy_configuration_changed(struct hci_dev *hdev, struct sock *skip);
2089 void mgmt_adv_monitor_device_lost(struct hci_dev *hdev, u16 handle,
2090                                   bdaddr_t *bdaddr, u8 addr_type);
2091
2092 int hci_abort_conn(struct hci_conn *conn, u8 reason);
2093 u8 hci_le_conn_update(struct hci_conn *conn, u16 min, u16 max, u16 latency,
2094                       u16 to_multiplier);
2095 void hci_le_start_enc(struct hci_conn *conn, __le16 ediv, __le64 rand,
2096                       __u8 ltk[16], __u8 key_size);
2097
2098 void hci_copy_identity_address(struct hci_dev *hdev, bdaddr_t *bdaddr,
2099                                u8 *bdaddr_type);
2100
2101 #define SCO_AIRMODE_MASK       0x0003
2102 #define SCO_AIRMODE_CVSD       0x0000
2103 #define SCO_AIRMODE_TRANSP     0x0003
2104
2105 #define LOCAL_CODEC_ACL_MASK    BIT(0)
2106 #define LOCAL_CODEC_SCO_MASK    BIT(1)
2107
2108 #define TRANSPORT_TYPE_MAX      0x04
2109
2110 #endif /* __HCI_CORE_H */