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/leds.h>
  29 #include <net/bluetooth/hci.h>
  30 #include <net/bluetooth/hci_sock.h>
  31
  32 /* HCI priority */
  33 #define HCI_PRIO_MAX    7
  34
  35 /* HCI Core structures */
  36 struct inquiry_data {
  37         bdaddr_t        bdaddr;
  38         __u8            pscan_rep_mode;
  39         __u8            pscan_period_mode;
  40         __u8            pscan_mode;
  41         __u8            dev_class[3];
  42         __le16          clock_offset;
  43         __s8            rssi;
  44         __u8            ssp_mode;
  45 };
  46
  47 struct inquiry_entry {
  48         struct list_head        all;            /* inq_cache.all */
  49         struct list_head        list;           /* unknown or resolve */
  50         enum {
  51                 NAME_NOT_KNOWN,
  52                 NAME_NEEDED,
  53                 NAME_PENDING,
  54                 NAME_KNOWN,
  55         } name_state;
  56         __u32                   timestamp;
  57         struct inquiry_data     data;
  58 };
  59
  60 struct discovery_state {
  61         int                     type;
  62         enum {
  63                 DISCOVERY_STOPPED,
  64                 DISCOVERY_STARTING,
  65                 DISCOVERY_FINDING,
  66                 DISCOVERY_RESOLVING,
  67                 DISCOVERY_STOPPING,
  68         } state;
  69         struct list_head        all;    /* All devices found during inquiry */
  70         struct list_head        unknown;        /* Name state not known */
  71         struct list_head        resolve;        /* Name needs to be resolved */
  72         __u32                   timestamp;
  73         bdaddr_t                last_adv_addr;
  74         u8                      last_adv_addr_type;
  75         s8                      last_adv_rssi;
  76         u32                     last_adv_flags;
  77         u8                      last_adv_data[HCI_MAX_AD_LENGTH];
  78         u8                      last_adv_data_len;
  79         bool                    report_invalid_rssi;
  80         bool                    result_filtering;
  81         bool                    limited;
  82         s8                      rssi;
  83         u16                     uuid_count;
  84         u8                      (*uuids)[16];
  85         unsigned long           scan_start;
  86         unsigned long           scan_duration;
  87 };
  88
  89 struct hci_conn_hash {
  90         struct list_head list;
  91         unsigned int     acl_num;
  92         unsigned int     amp_num;
  93         unsigned int     sco_num;
  94         unsigned int     le_num;
  95         unsigned int     le_num_slave;
  96 };
  97
  98 struct bdaddr_list {
  99         struct list_head list;
 100         bdaddr_t bdaddr;
 101         u8 bdaddr_type;
 102 };
 103
 104 struct bt_uuid {
 105         struct list_head list;
 106         u8 uuid[16];
 107         u8 size;
 108         u8 svc_hint;
 109 };
 110
 111 struct smp_csrk {
 112         bdaddr_t bdaddr;
 113         u8 bdaddr_type;
 114         u8 type;
 115         u8 val[16];
 116 };
 117
 118 struct smp_ltk {
 119         struct list_head list;
 120         struct rcu_head rcu;
 121         bdaddr_t bdaddr;
 122         u8 bdaddr_type;
 123         u8 authenticated;
 124         u8 type;
 125         u8 enc_size;
 126         __le16 ediv;
 127         __le64 rand;
 128         u8 val[16];
 129 };
 130
 131 struct smp_irk {
 132         struct list_head list;
 133         struct rcu_head rcu;
 134         bdaddr_t rpa;
 135         bdaddr_t bdaddr;
 136         u8 addr_type;
 137         u8 val[16];
 138 };
 139
 140 struct link_key {
 141         struct list_head list;
 142         struct rcu_head rcu;
 143         bdaddr_t bdaddr;
 144         u8 type;
 145         u8 val[HCI_LINK_KEY_SIZE];
 146         u8 pin_len;
 147 };
 148
 149 struct oob_data {
 150         struct list_head list;
 151         bdaddr_t bdaddr;
 152         u8 bdaddr_type;
 153         u8 present;
 154         u8 hash192[16];
 155         u8 rand192[16];
 156         u8 hash256[16];
 157         u8 rand256[16];
 158 };
 159
 160 struct adv_info {
 161         struct list_head list;
 162         bool pending;
 163         __u8    instance;
 164         __u32   flags;
 165         __u16   timeout;
 166         __u16   remaining_time;
 167         __u16   duration;
 168         __u16   adv_data_len;
 169         __u8    adv_data[HCI_MAX_AD_LENGTH];
 170         __u16   scan_rsp_len;
 171         __u8    scan_rsp_data[HCI_MAX_AD_LENGTH];
 172 };
 173
 174 #define HCI_MAX_ADV_INSTANCES           5
 175 #define HCI_DEFAULT_ADV_DURATION        2
 176
 177 #define HCI_MAX_SHORT_NAME_LENGTH       10
 178
 179 /* Min encryption key size to match with SMP */
 180 #define HCI_MIN_ENC_KEY_SIZE            7
 181
 182 /* Default LE RPA expiry time, 15 minutes */
 183 #define HCI_DEFAULT_RPA_TIMEOUT         (15 * 60)
 184
 185 /* Default min/max age of connection information (1s/3s) */
 186 #define DEFAULT_CONN_INFO_MIN_AGE       1000
 187 #define DEFAULT_CONN_INFO_MAX_AGE       3000
 188
 189 struct amp_assoc {
 190         __u16   len;
 191         __u16   offset;
 192         __u16   rem_len;
 193         __u16   len_so_far;
 194         __u8    data[HCI_MAX_AMP_ASSOC_SIZE];
 195 };
 196
 197 #define HCI_MAX_PAGES   3
 198
 199 struct hci_dev {
 200         struct list_head list;
 201         struct mutex    lock;
 202
 203         char            name[8];
 204         unsigned long   flags;
 205         __u16           id;
 206         __u8            bus;
 207         __u8            dev_type;
 208         bdaddr_t        bdaddr;
 209         bdaddr_t        setup_addr;
 210         bdaddr_t        public_addr;
 211         bdaddr_t        random_addr;
 212         bdaddr_t        static_addr;
 213         __u8            adv_addr_type;
 214         __u8            dev_name[HCI_MAX_NAME_LENGTH];
 215         __u8            short_name[HCI_MAX_SHORT_NAME_LENGTH];
 216         __u8            eir[HCI_MAX_EIR_LENGTH];
 217         __u16           appearance;
 218         __u8            dev_class[3];
 219         __u8            major_class;
 220         __u8            minor_class;
 221         __u8            max_page;
 222         __u8            features[HCI_MAX_PAGES][8];
 223         __u8            le_features[8];
 224         __u8            le_white_list_size;
 225         __u8            le_states[8];
 226         __u8            commands[64];
 227         __u8            hci_ver;
 228         __u16           hci_rev;
 229         __u8            lmp_ver;
 230         __u16           manufacturer;
 231         __u16           lmp_subver;
 232         __u16           voice_setting;
 233         __u8            num_iac;
 234         __u8            stored_max_keys;
 235         __u8            stored_num_keys;
 236         __u8            io_capability;
 237         __s8            inq_tx_power;
 238         __u16           page_scan_interval;
 239         __u16           page_scan_window;
 240         __u8            page_scan_type;
 241         __u8            le_adv_channel_map;
 242         __u16           le_adv_min_interval;
 243         __u16           le_adv_max_interval;
 244         __u8            le_scan_type;
 245         __u16           le_scan_interval;
 246         __u16           le_scan_window;
 247         __u16           le_conn_min_interval;
 248         __u16           le_conn_max_interval;
 249         __u16           le_conn_latency;
 250         __u16           le_supv_timeout;
 251         __u16           le_def_tx_len;
 252         __u16           le_def_tx_time;
 253         __u16           le_max_tx_len;
 254         __u16           le_max_tx_time;
 255         __u16           le_max_rx_len;
 256         __u16           le_max_rx_time;
 257         __u16           discov_interleaved_timeout;
 258         __u16           conn_info_min_age;
 259         __u16           conn_info_max_age;
 260         __u8            ssp_debug_mode;
 261         __u8            hw_error_code;
 262         __u32           clock;
 263
 264         __u16           devid_source;
 265         __u16           devid_vendor;
 266         __u16           devid_product;
 267         __u16           devid_version;
 268
 269         __u16           pkt_type;
 270         __u16           esco_type;
 271         __u16           link_policy;
 272         __u16           link_mode;
 273
 274         __u32           idle_timeout;
 275         __u16           sniff_min_interval;
 276         __u16           sniff_max_interval;
 277
 278         __u8            amp_status;
 279         __u32           amp_total_bw;
 280         __u32           amp_max_bw;
 281         __u32           amp_min_latency;
 282         __u32           amp_max_pdu;
 283         __u8            amp_type;
 284         __u16           amp_pal_cap;
 285         __u16           amp_assoc_size;
 286         __u32           amp_max_flush_to;
 287         __u32           amp_be_flush_to;
 288
 289         struct amp_assoc        loc_assoc;
 290
 291         __u8            flow_ctl_mode;
 292
 293         unsigned int    auto_accept_delay;
 294
 295         unsigned long   quirks;
 296
 297         atomic_t        cmd_cnt;
 298         unsigned int    acl_cnt;
 299         unsigned int    sco_cnt;
 300         unsigned int    le_cnt;
 301
 302         unsigned int    acl_mtu;
 303         unsigned int    sco_mtu;
 304         unsigned int    le_mtu;
 305         unsigned int    acl_pkts;
 306         unsigned int    sco_pkts;
 307         unsigned int    le_pkts;
 308
 309         __u16           block_len;
 310         __u16           block_mtu;
 311         __u16           num_blocks;
 312         __u16           block_cnt;
 313
 314         unsigned long   acl_last_tx;
 315         unsigned long   sco_last_tx;
 316         unsigned long   le_last_tx;
 317
 318         struct workqueue_struct *workqueue;
 319         struct workqueue_struct *req_workqueue;
 320
 321         struct work_struct      power_on;
 322         struct delayed_work     power_off;
 323         struct work_struct      error_reset;
 324
 325         __u16                   discov_timeout;
 326         struct delayed_work     discov_off;
 327
 328         struct delayed_work     service_cache;
 329
 330         struct delayed_work     cmd_timer;
 331
 332         struct work_struct      rx_work;
 333         struct work_struct      cmd_work;
 334         struct work_struct      tx_work;
 335
 336         struct work_struct      discov_update;
 337         struct work_struct      bg_scan_update;
 338         struct work_struct      scan_update;
 339         struct work_struct      connectable_update;
 340         struct work_struct      discoverable_update;
 341         struct delayed_work     le_scan_disable;
 342         struct delayed_work     le_scan_restart;
 343
 344         struct sk_buff_head     rx_q;
 345         struct sk_buff_head     raw_q;
 346         struct sk_buff_head     cmd_q;
 347
 348         struct sk_buff          *sent_cmd;
 349
 350         struct mutex            req_lock;
 351         wait_queue_head_t       req_wait_q;
 352         __u32                   req_status;
 353         __u32                   req_result;
 354         struct sk_buff          *req_skb;
 355
 356         void                    *smp_data;
 357         void                    *smp_bredr_data;
 358
 359         struct discovery_state  discovery;
 360         struct hci_conn_hash    conn_hash;
 361
 362         struct list_head        mgmt_pending;
 363         struct list_head        blacklist;
 364         struct list_head        whitelist;
 365         struct list_head        uuids;
 366         struct list_head        link_keys;
 367         struct list_head        long_term_keys;
 368         struct list_head        identity_resolving_keys;
 369         struct list_head        remote_oob_data;
 370         struct list_head        le_white_list;
 371         struct list_head        le_conn_params;
 372         struct list_head        pend_le_conns;
 373         struct list_head        pend_le_reports;
 374
 375         struct hci_dev_stats    stat;
 376
 377         atomic_t                promisc;
 378
 379         const char              *hw_info;
 380         const char              *fw_info;
 381         struct dentry           *debugfs;
 382
 383         struct device           dev;
 384
 385         struct rfkill           *rfkill;
 386
 387         DECLARE_BITMAP(dev_flags, __HCI_NUM_FLAGS);
 388
 389         __s8                    adv_tx_power;
 390         __u8                    adv_data[HCI_MAX_AD_LENGTH];
 391         __u8                    adv_data_len;
 392         __u8                    scan_rsp_data[HCI_MAX_AD_LENGTH];
 393         __u8                    scan_rsp_data_len;
 394
 395         struct list_head        adv_instances;
 396         unsigned int            adv_instance_cnt;
 397         __u8                    cur_adv_instance;
 398         __u16                   adv_instance_timeout;
 399         struct delayed_work     adv_instance_expire;
 400
 401         __u8                    irk[16];
 402         __u32                   rpa_timeout;
 403         struct delayed_work     rpa_expired;
 404         bdaddr_t                rpa;
 405
 406 #if IS_ENABLED(CONFIG_BT_LEDS)
 407         struct led_trigger      *power_led;
 408 #endif
 409
 410         int (*open)(struct hci_dev *hdev);
 411         int (*close)(struct hci_dev *hdev);
 412         int (*flush)(struct hci_dev *hdev);
 413         int (*setup)(struct hci_dev *hdev);
 414         int (*shutdown)(struct hci_dev *hdev);
 415         int (*send)(struct hci_dev *hdev, struct sk_buff *skb);
 416         void (*notify)(struct hci_dev *hdev, unsigned int evt);
 417         void (*hw_error)(struct hci_dev *hdev, u8 code);
 418         int (*post_init)(struct hci_dev *hdev);
 419         int (*set_diag)(struct hci_dev *hdev, bool enable);
 420         int (*set_bdaddr)(struct hci_dev *hdev, const bdaddr_t *bdaddr);
 421 };
 422
 423 #define HCI_PHY_HANDLE(handle)  (handle & 0xff)
 424
 425 struct hci_conn {
 426         struct list_head list;
 427
 428         atomic_t        refcnt;
 429
 430         bdaddr_t        dst;
 431         __u8            dst_type;
 432         bdaddr_t        src;
 433         __u8            src_type;
 434         bdaddr_t        init_addr;
 435         __u8            init_addr_type;
 436         bdaddr_t        resp_addr;
 437         __u8            resp_addr_type;
 438         __u16           handle;
 439         __u16           state;
 440         __u8            mode;
 441         __u8            type;
 442         __u8            role;
 443         bool            out;
 444         __u8            attempt;
 445         __u8            dev_class[3];
 446         __u8            features[HCI_MAX_PAGES][8];
 447         __u16           pkt_type;
 448         __u16           link_policy;
 449         __u8            key_type;
 450         __u8            auth_type;
 451         __u8            sec_level;
 452         __u8            pending_sec_level;
 453         __u8            pin_length;
 454         __u8            enc_key_size;
 455         __u8            io_capability;
 456         __u32           passkey_notify;
 457         __u8            passkey_entered;
 458         __u16           disc_timeout;
 459         __u16           conn_timeout;
 460         __u16           setting;
 461         __u16           le_conn_min_interval;
 462         __u16           le_conn_max_interval;
 463         __u16           le_conn_interval;
 464         __u16           le_conn_latency;
 465         __u16           le_supv_timeout;
 466         __u8            le_adv_data[HCI_MAX_AD_LENGTH];
 467         __u8            le_adv_data_len;
 468         __s8            rssi;
 469         __s8            tx_power;
 470         __s8            max_tx_power;
 471         unsigned long   flags;
 472
 473         __u32           clock;
 474         __u16           clock_accuracy;
 475
 476         unsigned long   conn_info_timestamp;
 477
 478         __u8            remote_cap;
 479         __u8            remote_auth;
 480         __u8            remote_id;
 481
 482         unsigned int    sent;
 483
 484         struct sk_buff_head data_q;
 485         struct list_head chan_list;
 486
 487         struct delayed_work disc_work;
 488         struct delayed_work auto_accept_work;
 489         struct delayed_work idle_work;
 490         struct delayed_work le_conn_timeout;
 491         struct work_struct  le_scan_cleanup;
 492
 493         struct device   dev;
 494         struct dentry   *debugfs;
 495
 496         struct hci_dev  *hdev;
 497         void            *l2cap_data;
 498         void            *sco_data;
 499         struct amp_mgr  *amp_mgr;
 500
 501         struct hci_conn *link;
 502
 503         void (*connect_cfm_cb)  (struct hci_conn *conn, u8 status);
 504         void (*security_cfm_cb) (struct hci_conn *conn, u8 status);
 505         void (*disconn_cfm_cb)  (struct hci_conn *conn, u8 reason);
 506 };
 507
 508 struct hci_chan {
 509         struct list_head list;
 510         __u16 handle;
 511         struct hci_conn *conn;
 512         struct sk_buff_head data_q;
 513         unsigned int    sent;
 514         __u8            state;
 515         bool            amp;
 516 };
 517
 518 struct hci_conn_params {
 519         struct list_head list;
 520         struct list_head action;
 521
 522         bdaddr_t addr;
 523         u8 addr_type;
 524
 525         u16 conn_min_interval;
 526         u16 conn_max_interval;
 527         u16 conn_latency;
 528         u16 supervision_timeout;
 529
 530         enum {
 531                 HCI_AUTO_CONN_DISABLED,
 532                 HCI_AUTO_CONN_REPORT,
 533                 HCI_AUTO_CONN_DIRECT,
 534                 HCI_AUTO_CONN_ALWAYS,
 535                 HCI_AUTO_CONN_LINK_LOSS,
 536                 HCI_AUTO_CONN_EXPLICIT,
 537         } auto_connect;
 538
 539         struct hci_conn *conn;
 540         bool explicit_connect;
 541 };
 542
 543 extern struct list_head hci_dev_list;
 544 extern struct list_head hci_cb_list;
 545 extern rwlock_t hci_dev_list_lock;
 546 extern struct mutex hci_cb_list_lock;
 547
 548 #define hci_dev_set_flag(hdev, nr)             set_bit((nr), (hdev)->dev_flags)
 549 #define hci_dev_clear_flag(hdev, nr)           clear_bit((nr), (hdev)->dev_flags)
 550 #define hci_dev_change_flag(hdev, nr)          change_bit((nr), (hdev)->dev_flags)
 551 #define hci_dev_test_flag(hdev, nr)            test_bit((nr), (hdev)->dev_flags)
 552 #define hci_dev_test_and_set_flag(hdev, nr)    test_and_set_bit((nr), (hdev)->dev_flags)
 553 #define hci_dev_test_and_clear_flag(hdev, nr)  test_and_clear_bit((nr), (hdev)->dev_flags)
 554 #define hci_dev_test_and_change_flag(hdev, nr) test_and_change_bit((nr), (hdev)->dev_flags)
 555
 556 #define hci_dev_clear_volatile_flags(hdev)                      \
 557         do {                                                    \
 558                 hci_dev_clear_flag(hdev, HCI_LE_SCAN);          \
 559                 hci_dev_clear_flag(hdev, HCI_LE_ADV);           \
 560                 hci_dev_clear_flag(hdev, HCI_PERIODIC_INQ);     \
 561         } while (0)
 562
 563 /* ----- HCI interface to upper protocols ----- */
 564 int l2cap_connect_ind(struct hci_dev *hdev, bdaddr_t *bdaddr);
 565 int l2cap_disconn_ind(struct hci_conn *hcon);
 566 void l2cap_recv_acldata(struct hci_conn *hcon, struct sk_buff *skb, u16 flags);
 567
 568 #if IS_ENABLED(CONFIG_BT_BREDR)
 569 int sco_connect_ind(struct hci_dev *hdev, bdaddr_t *bdaddr, __u8 *flags);
 570 void sco_recv_scodata(struct hci_conn *hcon, struct sk_buff *skb);
 571 #else
 572 static inline int sco_connect_ind(struct hci_dev *hdev, bdaddr_t *bdaddr,
 573                                   __u8 *flags)
 574 {
 575         return 0;
 576 }
 577
 578 static inline void sco_recv_scodata(struct hci_conn *hcon, struct sk_buff *skb)
 579 {
 580 }
 581 #endif
 582
 583 /* ----- Inquiry cache ----- */
 584 #define INQUIRY_CACHE_AGE_MAX   (HZ*30)   /* 30 seconds */
 585 #define INQUIRY_ENTRY_AGE_MAX   (HZ*60)   /* 60 seconds */
 586
 587 static inline void discovery_init(struct hci_dev *hdev)
 588 {
 589         hdev->discovery.state = DISCOVERY_STOPPED;
 590         INIT_LIST_HEAD(&hdev->discovery.all);
 591         INIT_LIST_HEAD(&hdev->discovery.unknown);
 592         INIT_LIST_HEAD(&hdev->discovery.resolve);
 593         hdev->discovery.report_invalid_rssi = true;
 594         hdev->discovery.rssi = HCI_RSSI_INVALID;
 595 }
 596
 597 static inline void hci_discovery_filter_clear(struct hci_dev *hdev)
 598 {
 599         hdev->discovery.result_filtering = false;
 600         hdev->discovery.report_invalid_rssi = true;
 601         hdev->discovery.rssi = HCI_RSSI_INVALID;
 602         hdev->discovery.uuid_count = 0;
 603         kfree(hdev->discovery.uuids);
 604         hdev->discovery.uuids = NULL;
 605         hdev->discovery.scan_start = 0;
 606         hdev->discovery.scan_duration = 0;
 607 }
 608
 609 bool hci_discovery_active(struct hci_dev *hdev);
 610
 611 void hci_discovery_set_state(struct hci_dev *hdev, int state);
 612
 613 static inline int inquiry_cache_empty(struct hci_dev *hdev)
 614 {
 615         return list_empty(&hdev->discovery.all);
 616 }
 617
 618 static inline long inquiry_cache_age(struct hci_dev *hdev)
 619 {
 620         struct discovery_state *c = &hdev->discovery;
 621         return jiffies - c->timestamp;
 622 }
 623
 624 static inline long inquiry_entry_age(struct inquiry_entry *e)
 625 {
 626         return jiffies - e->timestamp;
 627 }
 628
 629 struct inquiry_entry *hci_inquiry_cache_lookup(struct hci_dev *hdev,
 630                                                bdaddr_t *bdaddr);
 631 struct inquiry_entry *hci_inquiry_cache_lookup_unknown(struct hci_dev *hdev,
 632                                                        bdaddr_t *bdaddr);
 633 struct inquiry_entry *hci_inquiry_cache_lookup_resolve(struct hci_dev *hdev,
 634                                                        bdaddr_t *bdaddr,
 635                                                        int state);
 636 void hci_inquiry_cache_update_resolve(struct hci_dev *hdev,
 637                                       struct inquiry_entry *ie);
 638 u32 hci_inquiry_cache_update(struct hci_dev *hdev, struct inquiry_data *data,
 639                              bool name_known);
 640 void hci_inquiry_cache_flush(struct hci_dev *hdev);
 641
 642 /* ----- HCI Connections ----- */
 643 enum {
 644         HCI_CONN_AUTH_PEND,
 645         HCI_CONN_REAUTH_PEND,
 646         HCI_CONN_ENCRYPT_PEND,
 647         HCI_CONN_RSWITCH_PEND,
 648         HCI_CONN_MODE_CHANGE_PEND,
 649         HCI_CONN_SCO_SETUP_PEND,
 650         HCI_CONN_MGMT_CONNECTED,
 651         HCI_CONN_SSP_ENABLED,
 652         HCI_CONN_SC_ENABLED,
 653         HCI_CONN_AES_CCM,
 654         HCI_CONN_POWER_SAVE,
 655         HCI_CONN_FLUSH_KEY,
 656         HCI_CONN_ENCRYPT,
 657         HCI_CONN_AUTH,
 658         HCI_CONN_SECURE,
 659         HCI_CONN_FIPS,
 660         HCI_CONN_STK_ENCRYPT,
 661         HCI_CONN_AUTH_INITIATOR,
 662         HCI_CONN_DROP,
 663         HCI_CONN_PARAM_REMOVAL_PEND,
 664         HCI_CONN_NEW_LINK_KEY,
 665         HCI_CONN_SCANNING,
 666         HCI_CONN_AUTH_FAILURE,
 667 };
 668
 669 static inline bool hci_conn_ssp_enabled(struct hci_conn *conn)
 670 {
 671         struct hci_dev *hdev = conn->hdev;
 672         return hci_dev_test_flag(hdev, HCI_SSP_ENABLED) &&
 673                test_bit(HCI_CONN_SSP_ENABLED, &conn->flags);
 674 }
 675
 676 static inline bool hci_conn_sc_enabled(struct hci_conn *conn)
 677 {
 678         struct hci_dev *hdev = conn->hdev;
 679         return hci_dev_test_flag(hdev, HCI_SC_ENABLED) &&
 680                test_bit(HCI_CONN_SC_ENABLED, &conn->flags);
 681 }
 682
 683 static inline void hci_conn_hash_add(struct hci_dev *hdev, struct hci_conn *c)
 684 {
 685         struct hci_conn_hash *h = &hdev->conn_hash;
 686         list_add_rcu(&c->list, &h->list);
 687         switch (c->type) {
 688         case ACL_LINK:
 689                 h->acl_num++;
 690                 break;
 691         case AMP_LINK:
 692                 h->amp_num++;
 693                 break;
 694         case LE_LINK:
 695                 h->le_num++;
 696                 if (c->role == HCI_ROLE_SLAVE)
 697                         h->le_num_slave++;
 698                 break;
 699         case SCO_LINK:
 700         case ESCO_LINK:
 701                 h->sco_num++;
 702                 break;
 703         }
 704 }
 705
 706 static inline void hci_conn_hash_del(struct hci_dev *hdev, struct hci_conn *c)
 707 {
 708         struct hci_conn_hash *h = &hdev->conn_hash;
 709
 710         list_del_rcu(&c->list);
 711         synchronize_rcu();
 712
 713         switch (c->type) {
 714         case ACL_LINK:
 715                 h->acl_num--;
 716                 break;
 717         case AMP_LINK:
 718                 h->amp_num--;
 719                 break;
 720         case LE_LINK:
 721                 h->le_num--;
 722                 if (c->role == HCI_ROLE_SLAVE)
 723                         h->le_num_slave--;
 724                 break;
 725         case SCO_LINK:
 726         case ESCO_LINK:
 727                 h->sco_num--;
 728                 break;
 729         }
 730 }
 731
 732 static inline unsigned int hci_conn_num(struct hci_dev *hdev, __u8 type)
 733 {
 734         struct hci_conn_hash *h = &hdev->conn_hash;
 735         switch (type) {
 736         case ACL_LINK:
 737                 return h->acl_num;
 738         case AMP_LINK:
 739                 return h->amp_num;
 740         case LE_LINK:
 741                 return h->le_num;
 742         case SCO_LINK:
 743         case ESCO_LINK:
 744                 return h->sco_num;
 745         default:
 746                 return 0;
 747         }
 748 }
 749
 750 static inline unsigned int hci_conn_count(struct hci_dev *hdev)
 751 {
 752         struct hci_conn_hash *c = &hdev->conn_hash;
 753
 754         return c->acl_num + c->amp_num + c->sco_num + c->le_num;
 755 }
 756
 757 static inline __u8 hci_conn_lookup_type(struct hci_dev *hdev, __u16 handle)
 758 {
 759         struct hci_conn_hash *h = &hdev->conn_hash;
 760         struct hci_conn *c;
 761         __u8 type = INVALID_LINK;
 762
 763         rcu_read_lock();
 764
 765         list_for_each_entry_rcu(c, &h->list, list) {
 766                 if (c->handle == handle) {
 767                         type = c->type;
 768                         break;
 769                 }
 770         }
 771
 772         rcu_read_unlock();
 773
 774         return type;
 775 }
 776
 777 static inline struct hci_conn *hci_conn_hash_lookup_handle(struct hci_dev *hdev,
 778                                                                 __u16 handle)
 779 {
 780         struct hci_conn_hash *h = &hdev->conn_hash;
 781         struct hci_conn  *c;
 782
 783         rcu_read_lock();
 784
 785         list_for_each_entry_rcu(c, &h->list, list) {
 786                 if (c->handle == handle) {
 787                         rcu_read_unlock();
 788                         return c;
 789                 }
 790         }
 791         rcu_read_unlock();
 792
 793         return NULL;
 794 }
 795
 796 static inline struct hci_conn *hci_conn_hash_lookup_ba(struct hci_dev *hdev,
 797                                                         __u8 type, bdaddr_t *ba)
 798 {
 799         struct hci_conn_hash *h = &hdev->conn_hash;
 800         struct hci_conn  *c;
 801
 802         rcu_read_lock();
 803
 804         list_for_each_entry_rcu(c, &h->list, list) {
 805                 if (c->type == type && !bacmp(&c->dst, ba)) {
 806                         rcu_read_unlock();
 807                         return c;
 808                 }
 809         }
 810
 811         rcu_read_unlock();
 812
 813         return NULL;
 814 }
 815
 816 static inline struct hci_conn *hci_conn_hash_lookup_le(struct hci_dev *hdev,
 817                                                        bdaddr_t *ba,
 818                                                        __u8 ba_type)
 819 {
 820         struct hci_conn_hash *h = &hdev->conn_hash;
 821         struct hci_conn  *c;
 822
 823         rcu_read_lock();
 824
 825         list_for_each_entry_rcu(c, &h->list, list) {
 826                 if (c->type != LE_LINK)
 827                        continue;
 828
 829                 if (ba_type == c->dst_type && !bacmp(&c->dst, ba)) {
 830                         rcu_read_unlock();
 831                         return c;
 832                 }
 833         }
 834
 835         rcu_read_unlock();
 836
 837         return NULL;
 838 }
 839
 840 static inline struct hci_conn *hci_conn_hash_lookup_state(struct hci_dev *hdev,
 841                                                         __u8 type, __u16 state)
 842 {
 843         struct hci_conn_hash *h = &hdev->conn_hash;
 844         struct hci_conn  *c;
 845
 846         rcu_read_lock();
 847
 848         list_for_each_entry_rcu(c, &h->list, list) {
 849                 if (c->type == type && c->state == state) {
 850                         rcu_read_unlock();
 851                         return c;
 852                 }
 853         }
 854
 855         rcu_read_unlock();
 856
 857         return NULL;
 858 }
 859
 860 static inline struct hci_conn *hci_lookup_le_connect(struct hci_dev *hdev)
 861 {
 862         struct hci_conn_hash *h = &hdev->conn_hash;
 863         struct hci_conn  *c;
 864
 865         rcu_read_lock();
 866
 867         list_for_each_entry_rcu(c, &h->list, list) {
 868                 if (c->type == LE_LINK && c->state == BT_CONNECT &&
 869                     !test_bit(HCI_CONN_SCANNING, &c->flags)) {
 870                         rcu_read_unlock();
 871                         return c;
 872                 }
 873         }
 874
 875         rcu_read_unlock();
 876
 877         return NULL;
 878 }
 879
 880 int hci_disconnect(struct hci_conn *conn, __u8 reason);
 881 bool hci_setup_sync(struct hci_conn *conn, __u16 handle);
 882 void hci_sco_setup(struct hci_conn *conn, __u8 status);
 883
 884 struct hci_conn *hci_conn_add(struct hci_dev *hdev, int type, bdaddr_t *dst,
 885                               u8 role);
 886 int hci_conn_del(struct hci_conn *conn);
 887 void hci_conn_hash_flush(struct hci_dev *hdev);
 888 void hci_conn_check_pending(struct hci_dev *hdev);
 889
 890 struct hci_chan *hci_chan_create(struct hci_conn *conn);
 891 void hci_chan_del(struct hci_chan *chan);
 892 void hci_chan_list_flush(struct hci_conn *conn);
 893 struct hci_chan *hci_chan_lookup_handle(struct hci_dev *hdev, __u16 handle);
 894
 895 struct hci_conn *hci_connect_le_scan(struct hci_dev *hdev, bdaddr_t *dst,
 896                                      u8 dst_type, u8 sec_level,
 897                                      u16 conn_timeout);
 898 struct hci_conn *hci_connect_le(struct hci_dev *hdev, bdaddr_t *dst,
 899                                 u8 dst_type, u8 sec_level, u16 conn_timeout,
 900                                 u8 role, bdaddr_t *direct_rpa);
 901 struct hci_conn *hci_connect_acl(struct hci_dev *hdev, bdaddr_t *dst,
 902                                  u8 sec_level, u8 auth_type);
 903 struct hci_conn *hci_connect_sco(struct hci_dev *hdev, int type, bdaddr_t *dst,
 904                                  __u16 setting);
 905 int hci_conn_check_link_mode(struct hci_conn *conn);
 906 int hci_conn_check_secure(struct hci_conn *conn, __u8 sec_level);
 907 int hci_conn_security(struct hci_conn *conn, __u8 sec_level, __u8 auth_type,
 908                       bool initiator);
 909 int hci_conn_switch_role(struct hci_conn *conn, __u8 role);
 910
 911 void hci_conn_enter_active_mode(struct hci_conn *conn, __u8 force_active);
 912
 913 void hci_le_conn_failed(struct hci_conn *conn, u8 status);
 914
 915 /*
 916  * hci_conn_get() and hci_conn_put() are used to control the life-time of an
 917  * "hci_conn" object. They do not guarantee that the hci_conn object is running,
 918  * working or anything else. They just guarantee that the object is available
 919  * and can be dereferenced. So you can use its locks, local variables and any
 920  * other constant data.
 921  * Before accessing runtime data, you _must_ lock the object and then check that
 922  * it is still running. As soon as you release the locks, the connection might
 923  * get dropped, though.
 924  *
 925  * On the other hand, hci_conn_hold() and hci_conn_drop() are used to control
 926  * how long the underlying connection is held. So every channel that runs on the
 927  * hci_conn object calls this to prevent the connection from disappearing. As
 928  * long as you hold a device, you must also guarantee that you have a valid
 929  * reference to the device via hci_conn_get() (or the initial reference from
 930  * hci_conn_add()).
 931  * The hold()/drop() ref-count is known to drop below 0 sometimes, which doesn't
 932  * break because nobody cares for that. But this means, we cannot use
 933  * _get()/_drop() in it, but require the caller to have a valid ref (FIXME).
 934  */
 935
 936 static inline struct hci_conn *hci_conn_get(struct hci_conn *conn)
 937 {
 938         get_device(&conn->dev);
 939         return conn;
 940 }
 941
 942 static inline void hci_conn_put(struct hci_conn *conn)
 943 {
 944         put_device(&conn->dev);
 945 }
 946
 947 static inline void hci_conn_hold(struct hci_conn *conn)
 948 {
 949         BT_DBG("hcon %p orig refcnt %d", conn, atomic_read(&conn->refcnt));
 950
 951         atomic_inc(&conn->refcnt);
 952         cancel_delayed_work(&conn->disc_work);
 953 }
 954
 955 static inline void hci_conn_drop(struct hci_conn *conn)
 956 {
 957         BT_DBG("hcon %p orig refcnt %d", conn, atomic_read(&conn->refcnt));
 958
 959         if (atomic_dec_and_test(&conn->refcnt)) {
 960                 unsigned long timeo;
 961
 962                 switch (conn->type) {
 963                 case ACL_LINK:
 964                 case LE_LINK:
 965                         cancel_delayed_work(&conn->idle_work);
 966                         if (conn->state == BT_CONNECTED) {
 967                                 timeo = conn->disc_timeout;
 968                                 if (!conn->out)
 969                                         timeo *= 2;
 970                         } else {
 971                                 timeo = 0;
 972                         }
 973                         break;
 974
 975                 case AMP_LINK:
 976                         timeo = conn->disc_timeout;
 977                         break;
 978
 979                 default:
 980                         timeo = 0;
 981                         break;
 982                 }
 983
 984                 cancel_delayed_work(&conn->disc_work);
 985                 queue_delayed_work(conn->hdev->workqueue,
 986                                    &conn->disc_work, timeo);
 987         }
 988 }
 989
 990 /* ----- HCI Devices ----- */
 991 static inline void hci_dev_put(struct hci_dev *d)
 992 {
 993         BT_DBG("%s orig refcnt %d", d->name,
 994                atomic_read(&d->dev.kobj.kref.refcount));
 995
 996         put_device(&d->dev);
 997 }
 998
 999 static inline struct hci_dev *hci_dev_hold(struct hci_dev *d)
1000 {
1001         BT_DBG("%s orig refcnt %d", d->name,
1002                atomic_read(&d->dev.kobj.kref.refcount));
1003
1004         get_device(&d->dev);
1005         return d;
1006 }
1007
1008 #define hci_dev_lock(d)         mutex_lock(&d->lock)
1009 #define hci_dev_unlock(d)       mutex_unlock(&d->lock)
1010
1011 #define to_hci_dev(d) container_of(d, struct hci_dev, dev)
1012 #define to_hci_conn(c) container_of(c, struct hci_conn, dev)
1013
1014 static inline void *hci_get_drvdata(struct hci_dev *hdev)
1015 {
1016         return dev_get_drvdata(&hdev->dev);
1017 }
1018
1019 static inline void hci_set_drvdata(struct hci_dev *hdev, void *data)
1020 {
1021         dev_set_drvdata(&hdev->dev, data);
1022 }
1023
1024 struct hci_dev *hci_dev_get(int index);
1025 struct hci_dev *hci_get_route(bdaddr_t *dst, bdaddr_t *src, u8 src_type);
1026
1027 struct hci_dev *hci_alloc_dev(void);
1028 void hci_free_dev(struct hci_dev *hdev);
1029 int hci_register_dev(struct hci_dev *hdev);
1030 void hci_unregister_dev(struct hci_dev *hdev);
1031 void hci_cleanup_dev(struct hci_dev *hdev);
1032 int hci_suspend_dev(struct hci_dev *hdev);
1033 int hci_resume_dev(struct hci_dev *hdev);
1034 int hci_reset_dev(struct hci_dev *hdev);
1035 int hci_recv_frame(struct hci_dev *hdev, struct sk_buff *skb);
1036 int hci_recv_diag(struct hci_dev *hdev, struct sk_buff *skb);
1037 __printf(2, 3) void hci_set_hw_info(struct hci_dev *hdev, const char *fmt, ...);
1038 __printf(2, 3) void hci_set_fw_info(struct hci_dev *hdev, const char *fmt, ...);
1039 int hci_dev_open(__u16 dev);
1040 int hci_dev_close(__u16 dev);
1041 int hci_dev_do_close(struct hci_dev *hdev);
1042 int hci_dev_reset(__u16 dev);
1043 int hci_dev_reset_stat(__u16 dev);
1044 int hci_dev_cmd(unsigned int cmd, void __user *arg);
1045 int hci_get_dev_list(void __user *arg);
1046 int hci_get_dev_info(void __user *arg);
1047 int hci_get_conn_list(void __user *arg);
1048 int hci_get_conn_info(struct hci_dev *hdev, void __user *arg);
1049 int hci_get_auth_info(struct hci_dev *hdev, void __user *arg);
1050 int hci_inquiry(void __user *arg);
1051
1052 struct bdaddr_list *hci_bdaddr_list_lookup(struct list_head *list,
1053                                            bdaddr_t *bdaddr, u8 type);
1054 int hci_bdaddr_list_add(struct list_head *list, bdaddr_t *bdaddr, u8 type);
1055 int hci_bdaddr_list_del(struct list_head *list, bdaddr_t *bdaddr, u8 type);
1056 void hci_bdaddr_list_clear(struct list_head *list);
1057
1058 struct hci_conn_params *hci_conn_params_lookup(struct hci_dev *hdev,
1059                                                bdaddr_t *addr, u8 addr_type);
1060 struct hci_conn_params *hci_conn_params_add(struct hci_dev *hdev,
1061                                             bdaddr_t *addr, u8 addr_type);
1062 void hci_conn_params_del(struct hci_dev *hdev, bdaddr_t *addr, u8 addr_type);
1063 void hci_conn_params_clear_disabled(struct hci_dev *hdev);
1064
1065 struct hci_conn_params *hci_pend_le_action_lookup(struct list_head *list,
1066                                                   bdaddr_t *addr,
1067                                                   u8 addr_type);
1068
1069 void hci_uuids_clear(struct hci_dev *hdev);
1070
1071 void hci_link_keys_clear(struct hci_dev *hdev);
1072 struct link_key *hci_find_link_key(struct hci_dev *hdev, bdaddr_t *bdaddr);
1073 struct link_key *hci_add_link_key(struct hci_dev *hdev, struct hci_conn *conn,
1074                                   bdaddr_t *bdaddr, u8 *val, u8 type,
1075                                   u8 pin_len, bool *persistent);
1076 struct smp_ltk *hci_add_ltk(struct hci_dev *hdev, bdaddr_t *bdaddr,
1077                             u8 addr_type, u8 type, u8 authenticated,
1078                             u8 tk[16], u8 enc_size, __le16 ediv, __le64 rand);
1079 struct smp_ltk *hci_find_ltk(struct hci_dev *hdev, bdaddr_t *bdaddr,
1080                              u8 addr_type, u8 role);
1081 int hci_remove_ltk(struct hci_dev *hdev, bdaddr_t *bdaddr, u8 bdaddr_type);
1082 void hci_smp_ltks_clear(struct hci_dev *hdev);
1083 int hci_remove_link_key(struct hci_dev *hdev, bdaddr_t *bdaddr);
1084
1085 struct smp_irk *hci_find_irk_by_rpa(struct hci_dev *hdev, bdaddr_t *rpa);
1086 struct smp_irk *hci_find_irk_by_addr(struct hci_dev *hdev, bdaddr_t *bdaddr,
1087                                      u8 addr_type);
1088 struct smp_irk *hci_add_irk(struct hci_dev *hdev, bdaddr_t *bdaddr,
1089                             u8 addr_type, u8 val[16], bdaddr_t *rpa);
1090 void hci_remove_irk(struct hci_dev *hdev, bdaddr_t *bdaddr, u8 addr_type);
1091 void hci_smp_irks_clear(struct hci_dev *hdev);
1092
1093 bool hci_bdaddr_is_paired(struct hci_dev *hdev, bdaddr_t *bdaddr, u8 type);
1094
1095 void hci_remote_oob_data_clear(struct hci_dev *hdev);
1096 struct oob_data *hci_find_remote_oob_data(struct hci_dev *hdev,
1097                                           bdaddr_t *bdaddr, u8 bdaddr_type);
1098 int hci_add_remote_oob_data(struct hci_dev *hdev, bdaddr_t *bdaddr,
1099                             u8 bdaddr_type, u8 *hash192, u8 *rand192,
1100                             u8 *hash256, u8 *rand256);
1101 int hci_remove_remote_oob_data(struct hci_dev *hdev, bdaddr_t *bdaddr,
1102                                u8 bdaddr_type);
1103
1104 void hci_adv_instances_clear(struct hci_dev *hdev);
1105 struct adv_info *hci_find_adv_instance(struct hci_dev *hdev, u8 instance);
1106 struct adv_info *hci_get_next_instance(struct hci_dev *hdev, u8 instance);
1107 int hci_add_adv_instance(struct hci_dev *hdev, u8 instance, u32 flags,
1108                          u16 adv_data_len, u8 *adv_data,
1109                          u16 scan_rsp_len, u8 *scan_rsp_data,
1110                          u16 timeout, u16 duration);
1111 int hci_remove_adv_instance(struct hci_dev *hdev, u8 instance);
1112
1113 void hci_event_packet(struct hci_dev *hdev, struct sk_buff *skb);
1114
1115 void hci_init_sysfs(struct hci_dev *hdev);
1116 void hci_conn_init_sysfs(struct hci_conn *conn);
1117 void hci_conn_add_sysfs(struct hci_conn *conn);
1118 void hci_conn_del_sysfs(struct hci_conn *conn);
1119
1120 #define SET_HCIDEV_DEV(hdev, pdev) ((hdev)->dev.parent = (pdev))
1121
1122 /* ----- LMP capabilities ----- */
1123 #define lmp_encrypt_capable(dev)   ((dev)->features[0][0] & LMP_ENCRYPT)
1124 #define lmp_rswitch_capable(dev)   ((dev)->features[0][0] & LMP_RSWITCH)
1125 #define lmp_hold_capable(dev)      ((dev)->features[0][0] & LMP_HOLD)
1126 #define lmp_sniff_capable(dev)     ((dev)->features[0][0] & LMP_SNIFF)
1127 #define lmp_park_capable(dev)      ((dev)->features[0][1] & LMP_PARK)
1128 #define lmp_inq_rssi_capable(dev)  ((dev)->features[0][3] & LMP_RSSI_INQ)
1129 #define lmp_esco_capable(dev)      ((dev)->features[0][3] & LMP_ESCO)
1130 #define lmp_bredr_capable(dev)     (!((dev)->features[0][4] & LMP_NO_BREDR))
1131 #define lmp_le_capable(dev)        ((dev)->features[0][4] & LMP_LE)
1132 #define lmp_sniffsubr_capable(dev) ((dev)->features[0][5] & LMP_SNIFF_SUBR)
1133 #define lmp_pause_enc_capable(dev) ((dev)->features[0][5] & LMP_PAUSE_ENC)
1134 #define lmp_ext_inq_capable(dev)   ((dev)->features[0][6] & LMP_EXT_INQ)
1135 #define lmp_le_br_capable(dev)     (!!((dev)->features[0][6] & LMP_SIMUL_LE_BR))
1136 #define lmp_ssp_capable(dev)       ((dev)->features[0][6] & LMP_SIMPLE_PAIR)
1137 #define lmp_no_flush_capable(dev)  ((dev)->features[0][6] & LMP_NO_FLUSH)
1138 #define lmp_lsto_capable(dev)      ((dev)->features[0][7] & LMP_LSTO)
1139 #define lmp_inq_tx_pwr_capable(dev) ((dev)->features[0][7] & LMP_INQ_TX_PWR)
1140 #define lmp_ext_feat_capable(dev)  ((dev)->features[0][7] & LMP_EXTFEATURES)
1141 #define lmp_transp_capable(dev)    ((dev)->features[0][2] & LMP_TRANSPARENT)
1142
1143 /* ----- Extended LMP capabilities ----- */
1144 #define lmp_csb_master_capable(dev) ((dev)->features[2][0] & LMP_CSB_MASTER)
1145 #define lmp_csb_slave_capable(dev)  ((dev)->features[2][0] & LMP_CSB_SLAVE)
1146 #define lmp_sync_train_capable(dev) ((dev)->features[2][0] & LMP_SYNC_TRAIN)
1147 #define lmp_sync_scan_capable(dev)  ((dev)->features[2][0] & LMP_SYNC_SCAN)
1148 #define lmp_sc_capable(dev)         ((dev)->features[2][1] & LMP_SC)
1149 #define lmp_ping_capable(dev)       ((dev)->features[2][1] & LMP_PING)
1150
1151 /* ----- Host capabilities ----- */
1152 #define lmp_host_ssp_capable(dev)  ((dev)->features[1][0] & LMP_HOST_SSP)
1153 #define lmp_host_sc_capable(dev)   ((dev)->features[1][0] & LMP_HOST_SC)
1154 #define lmp_host_le_capable(dev)   (!!((dev)->features[1][0] & LMP_HOST_LE))
1155 #define lmp_host_le_br_capable(dev) (!!((dev)->features[1][0] & LMP_HOST_LE_BREDR))
1156
1157 #define hdev_is_powered(dev)   (test_bit(HCI_UP, &(dev)->flags) && \
1158                                 !hci_dev_test_flag(dev, HCI_AUTO_OFF))
1159 #define bredr_sc_enabled(dev)  (lmp_sc_capable(dev) && \
1160                                 hci_dev_test_flag(dev, HCI_SC_ENABLED))
1161
1162 /* ----- HCI protocols ----- */
1163 #define HCI_PROTO_DEFER             0x01
1164
1165 static inline int hci_proto_connect_ind(struct hci_dev *hdev, bdaddr_t *bdaddr,
1166                                         __u8 type, __u8 *flags)
1167 {
1168         switch (type) {
1169         case ACL_LINK:
1170                 return l2cap_connect_ind(hdev, bdaddr);
1171
1172         case SCO_LINK:
1173         case ESCO_LINK:
1174                 return sco_connect_ind(hdev, bdaddr, flags);
1175
1176         default:
1177                 BT_ERR("unknown link type %d", type);
1178                 return -EINVAL;
1179         }
1180 }
1181
1182 static inline int hci_proto_disconn_ind(struct hci_conn *conn)
1183 {
1184         if (conn->type != ACL_LINK && conn->type != LE_LINK)
1185                 return HCI_ERROR_REMOTE_USER_TERM;
1186
1187         return l2cap_disconn_ind(conn);
1188 }
1189
1190 /* ----- HCI callbacks ----- */
1191 struct hci_cb {
1192         struct list_head list;
1193
1194         char *name;
1195
1196         void (*connect_cfm)     (struct hci_conn *conn, __u8 status);
1197         void (*disconn_cfm)     (struct hci_conn *conn, __u8 status);
1198         void (*security_cfm)    (struct hci_conn *conn, __u8 status,
1199                                                                 __u8 encrypt);
1200         void (*key_change_cfm)  (struct hci_conn *conn, __u8 status);
1201         void (*role_switch_cfm) (struct hci_conn *conn, __u8 status, __u8 role);
1202 };
1203
1204 static inline void hci_connect_cfm(struct hci_conn *conn, __u8 status)
1205 {
1206         struct hci_cb *cb;
1207
1208         mutex_lock(&hci_cb_list_lock);
1209         list_for_each_entry(cb, &hci_cb_list, list) {
1210                 if (cb->connect_cfm)
1211                         cb->connect_cfm(conn, status);
1212         }
1213         mutex_unlock(&hci_cb_list_lock);
1214
1215         if (conn->connect_cfm_cb)
1216                 conn->connect_cfm_cb(conn, status);
1217 }
1218
1219 static inline void hci_disconn_cfm(struct hci_conn *conn, __u8 reason)
1220 {
1221         struct hci_cb *cb;
1222
1223         mutex_lock(&hci_cb_list_lock);
1224         list_for_each_entry(cb, &hci_cb_list, list) {
1225                 if (cb->disconn_cfm)
1226                         cb->disconn_cfm(conn, reason);
1227         }
1228         mutex_unlock(&hci_cb_list_lock);
1229
1230         if (conn->disconn_cfm_cb)
1231                 conn->disconn_cfm_cb(conn, reason);
1232 }
1233
1234 static inline void hci_auth_cfm(struct hci_conn *conn, __u8 status)
1235 {
1236         struct hci_cb *cb;
1237         __u8 encrypt;
1238
1239         if (test_bit(HCI_CONN_ENCRYPT_PEND, &conn->flags))
1240                 return;
1241
1242         encrypt = test_bit(HCI_CONN_ENCRYPT, &conn->flags) ? 0x01 : 0x00;
1243
1244         mutex_lock(&hci_cb_list_lock);
1245         list_for_each_entry(cb, &hci_cb_list, list) {
1246                 if (cb->security_cfm)
1247                         cb->security_cfm(conn, status, encrypt);
1248         }
1249         mutex_unlock(&hci_cb_list_lock);
1250
1251         if (conn->security_cfm_cb)
1252                 conn->security_cfm_cb(conn, status);
1253 }
1254
1255 static inline void hci_encrypt_cfm(struct hci_conn *conn, __u8 status)
1256 {
1257         struct hci_cb *cb;
1258         __u8 encrypt;
1259
1260         if (conn->state == BT_CONFIG) {
1261                 if (!status)
1262                         conn->state = BT_CONNECTED;
1263
1264                 hci_connect_cfm(conn, status);
1265                 hci_conn_drop(conn);
1266                 return;
1267         }
1268
1269         if (!test_bit(HCI_CONN_ENCRYPT, &conn->flags))
1270                 encrypt = 0x00;
1271         else if (test_bit(HCI_CONN_AES_CCM, &conn->flags))
1272                 encrypt = 0x02;
1273         else
1274                 encrypt = 0x01;
1275
1276         if (!status) {
1277                 if (conn->sec_level == BT_SECURITY_SDP)
1278                         conn->sec_level = BT_SECURITY_LOW;
1279
1280                 if (conn->pending_sec_level > conn->sec_level)
1281                         conn->sec_level = conn->pending_sec_level;
1282         }
1283
1284         mutex_lock(&hci_cb_list_lock);
1285         list_for_each_entry(cb, &hci_cb_list, list) {
1286                 if (cb->security_cfm)
1287                         cb->security_cfm(conn, status, encrypt);
1288         }
1289         mutex_unlock(&hci_cb_list_lock);
1290
1291         if (conn->security_cfm_cb)
1292                 conn->security_cfm_cb(conn, status);
1293 }
1294
1295 static inline void hci_key_change_cfm(struct hci_conn *conn, __u8 status)
1296 {
1297         struct hci_cb *cb;
1298
1299         mutex_lock(&hci_cb_list_lock);
1300         list_for_each_entry(cb, &hci_cb_list, list) {
1301                 if (cb->key_change_cfm)
1302                         cb->key_change_cfm(conn, status);
1303         }
1304         mutex_unlock(&hci_cb_list_lock);
1305 }
1306
1307 static inline void hci_role_switch_cfm(struct hci_conn *conn, __u8 status,
1308                                                                 __u8 role)
1309 {
1310         struct hci_cb *cb;
1311
1312         mutex_lock(&hci_cb_list_lock);
1313         list_for_each_entry(cb, &hci_cb_list, list) {
1314                 if (cb->role_switch_cfm)
1315                         cb->role_switch_cfm(conn, status, role);
1316         }
1317         mutex_unlock(&hci_cb_list_lock);
1318 }
1319
1320 static inline void *eir_get_data(u8 *eir, size_t eir_len, u8 type,
1321                                  size_t *data_len)
1322 {
1323         size_t parsed = 0;
1324
1325         if (eir_len < 2)
1326                 return NULL;
1327
1328         while (parsed < eir_len - 1) {
1329                 u8 field_len = eir[0];
1330
1331                 if (field_len == 0)
1332                         break;
1333
1334                 parsed += field_len + 1;
1335
1336                 if (parsed > eir_len)
1337                         break;
1338
1339                 if (eir[1] != type) {
1340                         eir += field_len + 1;
1341                         continue;
1342                 }
1343
1344                 /* Zero length data */
1345                 if (field_len == 1)
1346                         return NULL;
1347
1348                 if (data_len)
1349                         *data_len = field_len - 1;
1350
1351                 return &eir[2];
1352         }
1353
1354         return NULL;
1355 }
1356
1357 static inline bool hci_bdaddr_is_rpa(bdaddr_t *bdaddr, u8 addr_type)
1358 {
1359         if (addr_type != ADDR_LE_DEV_RANDOM)
1360                 return false;
1361
1362         if ((bdaddr->b[5] & 0xc0) == 0x40)
1363                return true;
1364
1365         return false;
1366 }
1367
1368 static inline bool hci_is_identity_address(bdaddr_t *addr, u8 addr_type)
1369 {
1370         if (addr_type == ADDR_LE_DEV_PUBLIC)
1371                 return true;
1372
1373         /* Check for Random Static address type */
1374         if ((addr->b[5] & 0xc0) == 0xc0)
1375                 return true;
1376
1377         return false;
1378 }
1379
1380 static inline struct smp_irk *hci_get_irk(struct hci_dev *hdev,
1381                                           bdaddr_t *bdaddr, u8 addr_type)
1382 {
1383         if (!hci_bdaddr_is_rpa(bdaddr, addr_type))
1384                 return NULL;
1385
1386         return hci_find_irk_by_rpa(hdev, bdaddr);
1387 }
1388
1389 static inline int hci_check_conn_params(u16 min, u16 max, u16 latency,
1390                                         u16 to_multiplier)
1391 {
1392         u16 max_latency;
1393
1394         if (min > max || min < 6 || max > 3200)
1395                 return -EINVAL;
1396
1397         if (to_multiplier < 10 || to_multiplier > 3200)
1398                 return -EINVAL;
1399
1400         if (max >= to_multiplier * 8)
1401                 return -EINVAL;
1402
1403         max_latency = (to_multiplier * 4 / max) - 1;
1404         if (latency > 499 || latency > max_latency)
1405                 return -EINVAL;
1406
1407         return 0;
1408 }
1409
1410 int hci_register_cb(struct hci_cb *hcb);
1411 int hci_unregister_cb(struct hci_cb *hcb);
1412
1413 struct sk_buff *__hci_cmd_sync(struct hci_dev *hdev, u16 opcode, u32 plen,
1414                                const void *param, u32 timeout);
1415 struct sk_buff *__hci_cmd_sync_ev(struct hci_dev *hdev, u16 opcode, u32 plen,
1416                                   const void *param, u8 event, u32 timeout);
1417
1418 int hci_send_cmd(struct hci_dev *hdev, __u16 opcode, __u32 plen,
1419                  const void *param);
1420 void hci_send_acl(struct hci_chan *chan, struct sk_buff *skb, __u16 flags);
1421 void hci_send_sco(struct hci_conn *conn, struct sk_buff *skb);
1422
1423 void *hci_sent_cmd_data(struct hci_dev *hdev, __u16 opcode);
1424
1425 struct sk_buff *hci_cmd_sync(struct hci_dev *hdev, u16 opcode, u32 plen,
1426                              const void *param, u32 timeout);
1427
1428 /* ----- HCI Sockets ----- */
1429 void hci_send_to_sock(struct hci_dev *hdev, struct sk_buff *skb);
1430 void hci_send_to_channel(unsigned short channel, struct sk_buff *skb,
1431                          int flag, struct sock *skip_sk);
1432 void hci_send_to_monitor(struct hci_dev *hdev, struct sk_buff *skb);
1433 void hci_send_monitor_ctrl_event(struct hci_dev *hdev, u16 event,
1434                                  void *data, u16 data_len, ktime_t tstamp,
1435                                  int flag, struct sock *skip_sk);
1436
1437 void hci_sock_dev_event(struct hci_dev *hdev, int event);
1438
1439 #define HCI_MGMT_VAR_LEN        BIT(0)
1440 #define HCI_MGMT_NO_HDEV        BIT(1)
1441 #define HCI_MGMT_UNTRUSTED      BIT(2)
1442 #define HCI_MGMT_UNCONFIGURED   BIT(3)
1443
1444 struct hci_mgmt_handler {
1445         int (*func) (struct sock *sk, struct hci_dev *hdev, void *data,
1446                      u16 data_len);
1447         size_t data_len;
1448         unsigned long flags;
1449 };
1450
1451 struct hci_mgmt_chan {
1452         struct list_head list;
1453         unsigned short channel;
1454         size_t handler_count;
1455         const struct hci_mgmt_handler *handlers;
1456         void (*hdev_init) (struct sock *sk, struct hci_dev *hdev);
1457 };
1458
1459 int hci_mgmt_chan_register(struct hci_mgmt_chan *c);
1460 void hci_mgmt_chan_unregister(struct hci_mgmt_chan *c);
1461
1462 /* Management interface */
1463 #define DISCOV_TYPE_BREDR               (BIT(BDADDR_BREDR))
1464 #define DISCOV_TYPE_LE                  (BIT(BDADDR_LE_PUBLIC) | \
1465                                          BIT(BDADDR_LE_RANDOM))
1466 #define DISCOV_TYPE_INTERLEAVED         (BIT(BDADDR_BREDR) | \
1467                                          BIT(BDADDR_LE_PUBLIC) | \
1468                                          BIT(BDADDR_LE_RANDOM))
1469
1470 /* These LE scan and inquiry parameters were chosen according to LE General
1471  * Discovery Procedure specification.
1472  */
1473 #define DISCOV_LE_SCAN_WIN              0x12
1474 #define DISCOV_LE_SCAN_INT              0x12
1475 #define DISCOV_LE_TIMEOUT               10240   /* msec */
1476 #define DISCOV_INTERLEAVED_TIMEOUT      5120    /* msec */
1477 #define DISCOV_INTERLEAVED_INQUIRY_LEN  0x04
1478 #define DISCOV_BREDR_INQUIRY_LEN        0x08
1479 #define DISCOV_LE_RESTART_DELAY         msecs_to_jiffies(200)   /* msec */
1480
1481 void mgmt_fill_version_info(void *ver);
1482 int mgmt_new_settings(struct hci_dev *hdev);
1483 void mgmt_index_added(struct hci_dev *hdev);
1484 void mgmt_index_removed(struct hci_dev *hdev);
1485 void mgmt_set_powered_failed(struct hci_dev *hdev, int err);
1486 void mgmt_power_on(struct hci_dev *hdev, int err);
1487 void __mgmt_power_off(struct hci_dev *hdev);
1488 void mgmt_new_link_key(struct hci_dev *hdev, struct link_key *key,
1489                        bool persistent);
1490 void mgmt_device_connected(struct hci_dev *hdev, struct hci_conn *conn,
1491                            u32 flags, u8 *name, u8 name_len);
1492 void mgmt_device_disconnected(struct hci_dev *hdev, bdaddr_t *bdaddr,
1493                               u8 link_type, u8 addr_type, u8 reason,
1494                               bool mgmt_connected);
1495 void mgmt_disconnect_failed(struct hci_dev *hdev, bdaddr_t *bdaddr,
1496                             u8 link_type, u8 addr_type, u8 status);
1497 void mgmt_connect_failed(struct hci_dev *hdev, bdaddr_t *bdaddr, u8 link_type,
1498                          u8 addr_type, u8 status);
1499 void mgmt_pin_code_request(struct hci_dev *hdev, bdaddr_t *bdaddr, u8 secure);
1500 void mgmt_pin_code_reply_complete(struct hci_dev *hdev, bdaddr_t *bdaddr,
1501                                   u8 status);
1502 void mgmt_pin_code_neg_reply_complete(struct hci_dev *hdev, bdaddr_t *bdaddr,
1503                                       u8 status);
1504 int mgmt_user_confirm_request(struct hci_dev *hdev, bdaddr_t *bdaddr,
1505                               u8 link_type, u8 addr_type, u32 value,
1506                               u8 confirm_hint);
1507 int mgmt_user_confirm_reply_complete(struct hci_dev *hdev, bdaddr_t *bdaddr,
1508                                      u8 link_type, u8 addr_type, u8 status);
1509 int mgmt_user_confirm_neg_reply_complete(struct hci_dev *hdev, bdaddr_t *bdaddr,
1510                                          u8 link_type, u8 addr_type, u8 status);
1511 int mgmt_user_passkey_request(struct hci_dev *hdev, bdaddr_t *bdaddr,
1512                               u8 link_type, u8 addr_type);
1513 int mgmt_user_passkey_reply_complete(struct hci_dev *hdev, bdaddr_t *bdaddr,
1514                                      u8 link_type, u8 addr_type, u8 status);
1515 int mgmt_user_passkey_neg_reply_complete(struct hci_dev *hdev, bdaddr_t *bdaddr,
1516                                          u8 link_type, u8 addr_type, u8 status);
1517 int mgmt_user_passkey_notify(struct hci_dev *hdev, bdaddr_t *bdaddr,
1518                              u8 link_type, u8 addr_type, u32 passkey,
1519                              u8 entered);
1520 void mgmt_auth_failed(struct hci_conn *conn, u8 status);
1521 void mgmt_auth_enable_complete(struct hci_dev *hdev, u8 status);
1522 void mgmt_ssp_enable_complete(struct hci_dev *hdev, u8 enable, u8 status);
1523 void mgmt_set_class_of_dev_complete(struct hci_dev *hdev, u8 *dev_class,
1524                                     u8 status);
1525 void mgmt_set_local_name_complete(struct hci_dev *hdev, u8 *name, u8 status);
1526 void mgmt_start_discovery_complete(struct hci_dev *hdev, u8 status);
1527 void mgmt_stop_discovery_complete(struct hci_dev *hdev, u8 status);
1528 void mgmt_device_found(struct hci_dev *hdev, bdaddr_t *bdaddr, u8 link_type,
1529                        u8 addr_type, u8 *dev_class, s8 rssi, u32 flags,
1530                        u8 *eir, u16 eir_len, u8 *scan_rsp, u8 scan_rsp_len);
1531 void mgmt_remote_name(struct hci_dev *hdev, bdaddr_t *bdaddr, u8 link_type,
1532                       u8 addr_type, s8 rssi, u8 *name, u8 name_len);
1533 void mgmt_discovering(struct hci_dev *hdev, u8 discovering);
1534 bool mgmt_powering_down(struct hci_dev *hdev);
1535 void mgmt_new_ltk(struct hci_dev *hdev, struct smp_ltk *key, bool persistent);
1536 void mgmt_new_irk(struct hci_dev *hdev, struct smp_irk *irk, bool persistent);
1537 void mgmt_new_csrk(struct hci_dev *hdev, struct smp_csrk *csrk,
1538                    bool persistent);
1539 void mgmt_new_conn_param(struct hci_dev *hdev, bdaddr_t *bdaddr,
1540                          u8 bdaddr_type, u8 store_hint, u16 min_interval,
1541                          u16 max_interval, u16 latency, u16 timeout);
1542 void mgmt_smp_complete(struct hci_conn *conn, bool complete);
1543 bool mgmt_get_connectable(struct hci_dev *hdev);
1544 void mgmt_set_connectable_complete(struct hci_dev *hdev, u8 status);
1545 void mgmt_set_discoverable_complete(struct hci_dev *hdev, u8 status);
1546 u8 mgmt_get_adv_discov_flags(struct hci_dev *hdev);
1547 void mgmt_advertising_added(struct sock *sk, struct hci_dev *hdev,
1548                             u8 instance);
1549 void mgmt_advertising_removed(struct sock *sk, struct hci_dev *hdev,
1550                               u8 instance);
1551
1552 u8 hci_le_conn_update(struct hci_conn *conn, u16 min, u16 max, u16 latency,
1553                       u16 to_multiplier);
1554 void hci_le_start_enc(struct hci_conn *conn, __le16 ediv, __le64 rand,
1555                       __u8 ltk[16], __u8 key_size);
1556
1557 void hci_copy_identity_address(struct hci_dev *hdev, bdaddr_t *bdaddr,
1558                                u8 *bdaddr_type);
1559
1560 #define SCO_AIRMODE_MASK       0x0003
1561 #define SCO_AIRMODE_CVSD       0x0000
1562 #define SCO_AIRMODE_TRANSP     0x0003
1563
1564 #endif /* __HCI_CORE_H */