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 <linux/rculist.h>
  30
  31 #include <net/bluetooth/hci.h>
  32 #include <net/bluetooth/hci_sock.h>
  33
  34 /* HCI priority */
  35 #define HCI_PRIO_MAX    7
  36
  37 /* HCI maximum id value */
  38 #define HCI_MAX_ID 10000
  39
  40 /* HCI Core structures */
  41 struct inquiry_data {
  42         bdaddr_t        bdaddr;
  43         __u8            pscan_rep_mode;
  44         __u8            pscan_period_mode;
  45         __u8            pscan_mode;
  46         __u8            dev_class[3];
  47         __le16          clock_offset;
  48         __s8            rssi;
  49         __u8            ssp_mode;
  50 };
  51
  52 struct inquiry_entry {
  53         struct list_head        all;            /* inq_cache.all */
  54         struct list_head        list;           /* unknown or resolve */
  55         enum {
  56                 NAME_NOT_KNOWN,
  57                 NAME_NEEDED,
  58                 NAME_PENDING,
  59                 NAME_KNOWN,
  60         } name_state;
  61         __u32                   timestamp;
  62         struct inquiry_data     data;
  63 };
  64
  65 struct discovery_state {
  66         int                     type;
  67         enum {
  68                 DISCOVERY_STOPPED,
  69                 DISCOVERY_STARTING,
  70                 DISCOVERY_FINDING,
  71                 DISCOVERY_RESOLVING,
  72                 DISCOVERY_STOPPING,
  73         } state;
  74         struct list_head        all;    /* All devices found during inquiry */
  75         struct list_head        unknown;        /* Name state not known */
  76         struct list_head        resolve;        /* Name needs to be resolved */
  77         __u32                   timestamp;
  78         bdaddr_t                last_adv_addr;
  79         u8                      last_adv_addr_type;
  80         s8                      last_adv_rssi;
  81         u32                     last_adv_flags;
  82         u8                      last_adv_data[HCI_MAX_AD_LENGTH];
  83         u8                      last_adv_data_len;
  84         bool                    report_invalid_rssi;
  85         bool                    result_filtering;
  86         bool                    limited;
  87         s8                      rssi;
  88         u16                     uuid_count;
  89         u8                      (*uuids)[16];
  90         unsigned long           scan_start;
  91         unsigned long           scan_duration;
  92 };
  93
  94 struct hci_conn_hash {
  95         struct list_head list;
  96         unsigned int     acl_num;
  97         unsigned int     amp_num;
  98         unsigned int     sco_num;
  99         unsigned int     le_num;
 100         unsigned int     le_num_slave;
 101 };
 102
 103 struct bdaddr_list {
 104         struct list_head list;
 105         bdaddr_t bdaddr;
 106         u8 bdaddr_type;
 107 };
 108
 109 struct bt_uuid {
 110         struct list_head list;
 111         u8 uuid[16];
 112         u8 size;
 113         u8 svc_hint;
 114 };
 115
 116 struct smp_csrk {
 117         bdaddr_t bdaddr;
 118         u8 bdaddr_type;
 119         u8 type;
 120         u8 val[16];
 121 };
 122
 123 struct smp_ltk {
 124         struct list_head list;
 125         struct rcu_head rcu;
 126         bdaddr_t bdaddr;
 127         u8 bdaddr_type;
 128         u8 authenticated;
 129         u8 type;
 130         u8 enc_size;
 131         __le16 ediv;
 132         __le64 rand;
 133         u8 val[16];
 134 };
 135
 136 struct smp_irk {
 137         struct list_head list;
 138         struct rcu_head rcu;
 139         bdaddr_t rpa;
 140         bdaddr_t bdaddr;
 141         u8 addr_type;
 142         u8 val[16];
 143 };
 144
 145 struct link_key {
 146         struct list_head list;
 147         struct rcu_head rcu;
 148         bdaddr_t bdaddr;
 149         u8 type;
 150         u8 val[HCI_LINK_KEY_SIZE];
 151         u8 pin_len;
 152 };
 153
 154 struct oob_data {
 155         struct list_head list;
 156         bdaddr_t bdaddr;
 157         u8 bdaddr_type;
 158         u8 present;
 159         u8 hash192[16];
 160         u8 rand192[16];
 161         u8 hash256[16];
 162         u8 rand256[16];
 163 };
 164
 165 struct adv_info {
 166         struct list_head list;
 167         bool pending;
 168         __u8    instance;
 169         __u32   flags;
 170         __u16   timeout;
 171         __u16   remaining_time;
 172         __u16   duration;
 173         __u16   adv_data_len;
 174         __u8    adv_data[HCI_MAX_AD_LENGTH];
 175         __u16   scan_rsp_len;
 176         __u8    scan_rsp_data[HCI_MAX_AD_LENGTH];
 177         __s8    tx_power;
 178         bdaddr_t        random_addr;
 179         bool            rpa_expired;
 180         struct delayed_work     rpa_expired_cb;
 181 };
 182
 183 #define HCI_MAX_ADV_INSTANCES           5
 184 #define HCI_DEFAULT_ADV_DURATION        2
 185
 186 #define HCI_MAX_SHORT_NAME_LENGTH       10
 187
 188 /* Min encryption key size to match with SMP */
 189 #define HCI_MIN_ENC_KEY_SIZE            7
 190
 191 /* Default LE RPA expiry time, 15 minutes */
 192 #define HCI_DEFAULT_RPA_TIMEOUT         (15 * 60)
 193
 194 /* Default min/max age of connection information (1s/3s) */
 195 #define DEFAULT_CONN_INFO_MIN_AGE       1000
 196 #define DEFAULT_CONN_INFO_MAX_AGE       3000
 197
 198 struct amp_assoc {
 199         __u16   len;
 200         __u16   offset;
 201         __u16   rem_len;
 202         __u16   len_so_far;
 203         __u8    data[HCI_MAX_AMP_ASSOC_SIZE];
 204 };
 205
 206 #define HCI_MAX_PAGES   3
 207
 208 struct hci_dev {
 209         struct list_head list;
 210         struct mutex    lock;
 211
 212         char            name[8];
 213         unsigned long   flags;
 214         __u16           id;
 215         __u8            bus;
 216         __u8            dev_type;
 217         bdaddr_t        bdaddr;
 218         bdaddr_t        setup_addr;
 219         bdaddr_t        public_addr;
 220         bdaddr_t        random_addr;
 221         bdaddr_t        static_addr;
 222         __u8            adv_addr_type;
 223         __u8            dev_name[HCI_MAX_NAME_LENGTH];
 224         __u8            short_name[HCI_MAX_SHORT_NAME_LENGTH];
 225         __u8            eir[HCI_MAX_EIR_LENGTH];
 226         __u16           appearance;
 227         __u8            dev_class[3];
 228         __u8            major_class;
 229         __u8            minor_class;
 230         __u8            max_page;
 231         __u8            features[HCI_MAX_PAGES][8];
 232         __u8            le_features[8];
 233         __u8            le_white_list_size;
 234         __u8            le_resolv_list_size;
 235         __u8            le_num_of_adv_sets;
 236         __u8            le_states[8];
 237         __u8            commands[64];
 238         __u8            hci_ver;
 239         __u16           hci_rev;
 240         __u8            lmp_ver;
 241         __u16           manufacturer;
 242         __u16           lmp_subver;
 243         __u16           voice_setting;
 244         __u8            num_iac;
 245         __u8            stored_max_keys;
 246         __u8            stored_num_keys;
 247         __u8            io_capability;
 248         __s8            inq_tx_power;
 249         __u16           page_scan_interval;
 250         __u16           page_scan_window;
 251         __u8            page_scan_type;
 252         __u8            le_adv_channel_map;
 253         __u16           le_adv_min_interval;
 254         __u16           le_adv_max_interval;
 255         __u8            le_scan_type;
 256         __u16           le_scan_interval;
 257         __u16           le_scan_window;
 258         __u16           le_conn_min_interval;
 259         __u16           le_conn_max_interval;
 260         __u16           le_conn_latency;
 261         __u16           le_supv_timeout;
 262         __u16           le_def_tx_len;
 263         __u16           le_def_tx_time;
 264         __u16           le_max_tx_len;
 265         __u16           le_max_tx_time;
 266         __u16           le_max_rx_len;
 267         __u16           le_max_rx_time;
 268         __u8            le_max_key_size;
 269         __u8            le_min_key_size;
 270         __u16           discov_interleaved_timeout;
 271         __u16           conn_info_min_age;
 272         __u16           conn_info_max_age;
 273         __u8            ssp_debug_mode;
 274         __u8            hw_error_code;
 275         __u32           clock;
 276
 277         __u16           devid_source;
 278         __u16           devid_vendor;
 279         __u16           devid_product;
 280         __u16           devid_version;
 281
 282         __u16           pkt_type;
 283         __u16           esco_type;
 284         __u16           link_policy;
 285         __u16           link_mode;
 286
 287         __u32           idle_timeout;
 288         __u16           sniff_min_interval;
 289         __u16           sniff_max_interval;
 290
 291         __u8            amp_status;
 292         __u32           amp_total_bw;
 293         __u32           amp_max_bw;
 294         __u32           amp_min_latency;
 295         __u32           amp_max_pdu;
 296         __u8            amp_type;
 297         __u16           amp_pal_cap;
 298         __u16           amp_assoc_size;
 299         __u32           amp_max_flush_to;
 300         __u32           amp_be_flush_to;
 301
 302         struct amp_assoc        loc_assoc;
 303
 304         __u8            flow_ctl_mode;
 305
 306         unsigned int    auto_accept_delay;
 307
 308         unsigned long   quirks;
 309
 310         atomic_t        cmd_cnt;
 311         unsigned int    acl_cnt;
 312         unsigned int    sco_cnt;
 313         unsigned int    le_cnt;
 314
 315         unsigned int    acl_mtu;
 316         unsigned int    sco_mtu;
 317         unsigned int    le_mtu;
 318         unsigned int    acl_pkts;
 319         unsigned int    sco_pkts;
 320         unsigned int    le_pkts;
 321
 322         __u16           block_len;
 323         __u16           block_mtu;
 324         __u16           num_blocks;
 325         __u16           block_cnt;
 326
 327         unsigned long   acl_last_tx;
 328         unsigned long   sco_last_tx;
 329         unsigned long   le_last_tx;
 330
 331         __u8            le_tx_def_phys;
 332         __u8            le_rx_def_phys;
 333
 334         struct workqueue_struct *workqueue;
 335         struct workqueue_struct *req_workqueue;
 336
 337         struct work_struct      power_on;
 338         struct delayed_work     power_off;
 339         struct work_struct      error_reset;
 340
 341         __u16                   discov_timeout;
 342         struct delayed_work     discov_off;
 343
 344         struct delayed_work     service_cache;
 345
 346         struct delayed_work     cmd_timer;
 347
 348         struct work_struct      rx_work;
 349         struct work_struct      cmd_work;
 350         struct work_struct      tx_work;
 351
 352         struct work_struct      discov_update;
 353         struct work_struct      bg_scan_update;
 354         struct work_struct      scan_update;
 355         struct work_struct      connectable_update;
 356         struct work_struct      discoverable_update;
 357         struct delayed_work     le_scan_disable;
 358         struct delayed_work     le_scan_restart;
 359
 360         struct sk_buff_head     rx_q;
 361         struct sk_buff_head     raw_q;
 362         struct sk_buff_head     cmd_q;
 363
 364         struct sk_buff          *sent_cmd;
 365
 366         struct mutex            req_lock;
 367         wait_queue_head_t       req_wait_q;
 368         __u32                   req_status;
 369         __u32                   req_result;
 370         struct sk_buff          *req_skb;
 371
 372         void                    *smp_data;
 373         void                    *smp_bredr_data;
 374
 375         struct discovery_state  discovery;
 376         struct hci_conn_hash    conn_hash;
 377
 378         struct list_head        mgmt_pending;
 379         struct list_head        blacklist;
 380         struct list_head        whitelist;
 381         struct list_head        uuids;
 382         struct list_head        link_keys;
 383         struct list_head        long_term_keys;
 384         struct list_head        identity_resolving_keys;
 385         struct list_head        remote_oob_data;
 386         struct list_head        le_white_list;
 387         struct list_head        le_resolv_list;
 388         struct list_head        le_conn_params;
 389         struct list_head        pend_le_conns;
 390         struct list_head        pend_le_reports;
 391
 392         struct hci_dev_stats    stat;
 393
 394         atomic_t                promisc;
 395
 396         const char              *hw_info;
 397         const char              *fw_info;
 398         struct dentry           *debugfs;
 399
 400         struct device           dev;
 401
 402         struct rfkill           *rfkill;
 403
 404         DECLARE_BITMAP(dev_flags, __HCI_NUM_FLAGS);
 405
 406         __s8                    adv_tx_power;
 407         __u8                    adv_data[HCI_MAX_AD_LENGTH];
 408         __u8                    adv_data_len;
 409         __u8                    scan_rsp_data[HCI_MAX_AD_LENGTH];
 410         __u8                    scan_rsp_data_len;
 411
 412         struct list_head        adv_instances;
 413         unsigned int            adv_instance_cnt;
 414         __u8                    cur_adv_instance;
 415         __u16                   adv_instance_timeout;
 416         struct delayed_work     adv_instance_expire;
 417
 418         __u8                    irk[16];
 419         __u32                   rpa_timeout;
 420         struct delayed_work     rpa_expired;
 421         bdaddr_t                rpa;
 422
 423 #if IS_ENABLED(CONFIG_BT_LEDS)
 424         struct led_trigger      *power_led;
 425 #endif
 426
 427         int (*open)(struct hci_dev *hdev);
 428         int (*close)(struct hci_dev *hdev);
 429         int (*flush)(struct hci_dev *hdev);
 430         int (*setup)(struct hci_dev *hdev);
 431         int (*shutdown)(struct hci_dev *hdev);
 432         int (*send)(struct hci_dev *hdev, struct sk_buff *skb);
 433         void (*notify)(struct hci_dev *hdev, unsigned int evt);
 434         void (*hw_error)(struct hci_dev *hdev, u8 code);
 435         int (*post_init)(struct hci_dev *hdev);
 436         int (*set_diag)(struct hci_dev *hdev, bool enable);
 437         int (*set_bdaddr)(struct hci_dev *hdev, const bdaddr_t *bdaddr);
 438 };
 439
 440 #define HCI_PHY_HANDLE(handle)  (handle & 0xff)
 441
 442 struct hci_conn {
 443         struct list_head list;
 444
 445         atomic_t        refcnt;
 446
 447         bdaddr_t        dst;
 448         __u8            dst_type;
 449         bdaddr_t        src;
 450         __u8            src_type;
 451         bdaddr_t        init_addr;
 452         __u8            init_addr_type;
 453         bdaddr_t        resp_addr;
 454         __u8            resp_addr_type;
 455         __u16           handle;
 456         __u16           state;
 457         __u8            mode;
 458         __u8            type;
 459         __u8            role;
 460         bool            out;
 461         __u8            attempt;
 462         __u8            dev_class[3];
 463         __u8            features[HCI_MAX_PAGES][8];
 464         __u16           pkt_type;
 465         __u16           link_policy;
 466         __u8            key_type;
 467         __u8            auth_type;
 468         __u8            sec_level;
 469         __u8            pending_sec_level;
 470         __u8            pin_length;
 471         __u8            enc_key_size;
 472         __u8            io_capability;
 473         __u32           passkey_notify;
 474         __u8            passkey_entered;
 475         __u16           disc_timeout;
 476         __u16           conn_timeout;
 477         __u16           setting;
 478         __u16           le_conn_min_interval;
 479         __u16           le_conn_max_interval;
 480         __u16           le_conn_interval;
 481         __u16           le_conn_latency;
 482         __u16           le_supv_timeout;
 483         __u8            le_adv_data[HCI_MAX_AD_LENGTH];
 484         __u8            le_adv_data_len;
 485         __s8            rssi;
 486         __s8            tx_power;
 487         __s8            max_tx_power;
 488         unsigned long   flags;
 489
 490         __u32           clock;
 491         __u16           clock_accuracy;
 492
 493         unsigned long   conn_info_timestamp;
 494
 495         __u8            remote_cap;
 496         __u8            remote_auth;
 497         __u8            remote_id;
 498
 499         unsigned int    sent;
 500
 501         struct sk_buff_head data_q;
 502         struct list_head chan_list;
 503
 504         struct delayed_work disc_work;
 505         struct delayed_work auto_accept_work;
 506         struct delayed_work idle_work;
 507         struct delayed_work le_conn_timeout;
 508         struct work_struct  le_scan_cleanup;
 509
 510         struct device   dev;
 511         struct dentry   *debugfs;
 512
 513         struct hci_dev  *hdev;
 514         void            *l2cap_data;
 515         void            *sco_data;
 516         struct amp_mgr  *amp_mgr;
 517
 518         struct hci_conn *link;
 519
 520         void (*connect_cfm_cb)  (struct hci_conn *conn, u8 status);
 521         void (*security_cfm_cb) (struct hci_conn *conn, u8 status);
 522         void (*disconn_cfm_cb)  (struct hci_conn *conn, u8 reason);
 523 };
 524
 525 struct hci_chan {
 526         struct list_head list;
 527         __u16 handle;
 528         struct hci_conn *conn;
 529         struct sk_buff_head data_q;
 530         unsigned int    sent;
 531         __u8            state;
 532         bool            amp;
 533 };
 534
 535 struct hci_conn_params {
 536         struct list_head list;
 537         struct list_head action;
 538
 539         bdaddr_t addr;
 540         u8 addr_type;
 541
 542         u16 conn_min_interval;
 543         u16 conn_max_interval;
 544         u16 conn_latency;
 545         u16 supervision_timeout;
 546
 547         enum {
 548                 HCI_AUTO_CONN_DISABLED,
 549                 HCI_AUTO_CONN_REPORT,
 550                 HCI_AUTO_CONN_DIRECT,
 551                 HCI_AUTO_CONN_ALWAYS,
 552                 HCI_AUTO_CONN_LINK_LOSS,
 553                 HCI_AUTO_CONN_EXPLICIT,
 554         } auto_connect;
 555
 556         struct hci_conn *conn;
 557         bool explicit_connect;
 558 };
 559
 560 extern struct list_head hci_dev_list;
 561 extern struct list_head hci_cb_list;
 562 extern rwlock_t hci_dev_list_lock;
 563 extern struct mutex hci_cb_list_lock;
 564
 565 #define hci_dev_set_flag(hdev, nr)             set_bit((nr), (hdev)->dev_flags)
 566 #define hci_dev_clear_flag(hdev, nr)           clear_bit((nr), (hdev)->dev_flags)
 567 #define hci_dev_change_flag(hdev, nr)          change_bit((nr), (hdev)->dev_flags)
 568 #define hci_dev_test_flag(hdev, nr)            test_bit((nr), (hdev)->dev_flags)
 569 #define hci_dev_test_and_set_flag(hdev, nr)    test_and_set_bit((nr), (hdev)->dev_flags)
 570 #define hci_dev_test_and_clear_flag(hdev, nr)  test_and_clear_bit((nr), (hdev)->dev_flags)
 571 #define hci_dev_test_and_change_flag(hdev, nr) test_and_change_bit((nr), (hdev)->dev_flags)
 572
 573 #define hci_dev_clear_volatile_flags(hdev)                      \
 574         do {                                                    \
 575                 hci_dev_clear_flag(hdev, HCI_LE_SCAN);          \
 576                 hci_dev_clear_flag(hdev, HCI_LE_ADV);           \
 577                 hci_dev_clear_flag(hdev, HCI_PERIODIC_INQ);     \
 578         } while (0)
 579
 580 /* ----- HCI interface to upper protocols ----- */
 581 int l2cap_connect_ind(struct hci_dev *hdev, bdaddr_t *bdaddr);
 582 int l2cap_disconn_ind(struct hci_conn *hcon);
 583 void l2cap_recv_acldata(struct hci_conn *hcon, struct sk_buff *skb, u16 flags);
 584
 585 #if IS_ENABLED(CONFIG_BT_BREDR)
 586 int sco_connect_ind(struct hci_dev *hdev, bdaddr_t *bdaddr, __u8 *flags);
 587 void sco_recv_scodata(struct hci_conn *hcon, struct sk_buff *skb);
 588 #else
 589 static inline int sco_connect_ind(struct hci_dev *hdev, bdaddr_t *bdaddr,
 590                                   __u8 *flags)
 591 {
 592         return 0;
 593 }
 594
 595 static inline void sco_recv_scodata(struct hci_conn *hcon, struct sk_buff *skb)
 596 {
 597 }
 598 #endif
 599
 600 /* ----- Inquiry cache ----- */
 601 #define INQUIRY_CACHE_AGE_MAX   (HZ*30)   /* 30 seconds */
 602 #define INQUIRY_ENTRY_AGE_MAX   (HZ*60)   /* 60 seconds */
 603
 604 static inline void discovery_init(struct hci_dev *hdev)
 605 {
 606         hdev->discovery.state = DISCOVERY_STOPPED;
 607         INIT_LIST_HEAD(&hdev->discovery.all);
 608         INIT_LIST_HEAD(&hdev->discovery.unknown);
 609         INIT_LIST_HEAD(&hdev->discovery.resolve);
 610         hdev->discovery.report_invalid_rssi = true;
 611         hdev->discovery.rssi = HCI_RSSI_INVALID;
 612 }
 613
 614 static inline void hci_discovery_filter_clear(struct hci_dev *hdev)
 615 {
 616         hdev->discovery.result_filtering = false;
 617         hdev->discovery.report_invalid_rssi = true;
 618         hdev->discovery.rssi = HCI_RSSI_INVALID;
 619         hdev->discovery.uuid_count = 0;
 620         kfree(hdev->discovery.uuids);
 621         hdev->discovery.uuids = NULL;
 622         hdev->discovery.scan_start = 0;
 623         hdev->discovery.scan_duration = 0;
 624 }
 625
 626 bool hci_discovery_active(struct hci_dev *hdev);
 627
 628 void hci_discovery_set_state(struct hci_dev *hdev, int state);
 629
 630 static inline int inquiry_cache_empty(struct hci_dev *hdev)
 631 {
 632         return list_empty(&hdev->discovery.all);
 633 }
 634
 635 static inline long inquiry_cache_age(struct hci_dev *hdev)
 636 {
 637         struct discovery_state *c = &hdev->discovery;
 638         return jiffies - c->timestamp;
 639 }
 640
 641 static inline long inquiry_entry_age(struct inquiry_entry *e)
 642 {
 643         return jiffies - e->timestamp;
 644 }
 645
 646 struct inquiry_entry *hci_inquiry_cache_lookup(struct hci_dev *hdev,
 647                                                bdaddr_t *bdaddr);
 648 struct inquiry_entry *hci_inquiry_cache_lookup_unknown(struct hci_dev *hdev,
 649                                                        bdaddr_t *bdaddr);
 650 struct inquiry_entry *hci_inquiry_cache_lookup_resolve(struct hci_dev *hdev,
 651                                                        bdaddr_t *bdaddr,
 652                                                        int state);
 653 void hci_inquiry_cache_update_resolve(struct hci_dev *hdev,
 654                                       struct inquiry_entry *ie);
 655 u32 hci_inquiry_cache_update(struct hci_dev *hdev, struct inquiry_data *data,
 656                              bool name_known);
 657 void hci_inquiry_cache_flush(struct hci_dev *hdev);
 658
 659 /* ----- HCI Connections ----- */
 660 enum {
 661         HCI_CONN_AUTH_PEND,
 662         HCI_CONN_REAUTH_PEND,
 663         HCI_CONN_ENCRYPT_PEND,
 664         HCI_CONN_RSWITCH_PEND,
 665         HCI_CONN_MODE_CHANGE_PEND,
 666         HCI_CONN_SCO_SETUP_PEND,
 667         HCI_CONN_MGMT_CONNECTED,
 668         HCI_CONN_SSP_ENABLED,
 669         HCI_CONN_SC_ENABLED,
 670         HCI_CONN_AES_CCM,
 671         HCI_CONN_POWER_SAVE,
 672         HCI_CONN_FLUSH_KEY,
 673         HCI_CONN_ENCRYPT,
 674         HCI_CONN_AUTH,
 675         HCI_CONN_SECURE,
 676         HCI_CONN_FIPS,
 677         HCI_CONN_STK_ENCRYPT,
 678         HCI_CONN_AUTH_INITIATOR,
 679         HCI_CONN_DROP,
 680         HCI_CONN_PARAM_REMOVAL_PEND,
 681         HCI_CONN_NEW_LINK_KEY,
 682         HCI_CONN_SCANNING,
 683         HCI_CONN_AUTH_FAILURE,
 684 };
 685
 686 static inline bool hci_conn_ssp_enabled(struct hci_conn *conn)
 687 {
 688         struct hci_dev *hdev = conn->hdev;
 689         return hci_dev_test_flag(hdev, HCI_SSP_ENABLED) &&
 690                test_bit(HCI_CONN_SSP_ENABLED, &conn->flags);
 691 }
 692
 693 static inline bool hci_conn_sc_enabled(struct hci_conn *conn)
 694 {
 695         struct hci_dev *hdev = conn->hdev;
 696         return hci_dev_test_flag(hdev, HCI_SC_ENABLED) &&
 697                test_bit(HCI_CONN_SC_ENABLED, &conn->flags);
 698 }
 699
 700 static inline void hci_conn_hash_add(struct hci_dev *hdev, struct hci_conn *c)
 701 {
 702         struct hci_conn_hash *h = &hdev->conn_hash;
 703         list_add_rcu(&c->list, &h->list);
 704         switch (c->type) {
 705         case ACL_LINK:
 706                 h->acl_num++;
 707                 break;
 708         case AMP_LINK:
 709                 h->amp_num++;
 710                 break;
 711         case LE_LINK:
 712                 h->le_num++;
 713                 if (c->role == HCI_ROLE_SLAVE)
 714                         h->le_num_slave++;
 715                 break;
 716         case SCO_LINK:
 717         case ESCO_LINK:
 718                 h->sco_num++;
 719                 break;
 720         }
 721 }
 722
 723 static inline void hci_conn_hash_del(struct hci_dev *hdev, struct hci_conn *c)
 724 {
 725         struct hci_conn_hash *h = &hdev->conn_hash;
 726
 727         list_del_rcu(&c->list);
 728         synchronize_rcu();
 729
 730         switch (c->type) {
 731         case ACL_LINK:
 732                 h->acl_num--;
 733                 break;
 734         case AMP_LINK:
 735                 h->amp_num--;
 736                 break;
 737         case LE_LINK:
 738                 h->le_num--;
 739                 if (c->role == HCI_ROLE_SLAVE)
 740                         h->le_num_slave--;
 741                 break;
 742         case SCO_LINK:
 743         case ESCO_LINK:
 744                 h->sco_num--;
 745                 break;
 746         }
 747 }
 748
 749 static inline unsigned int hci_conn_num(struct hci_dev *hdev, __u8 type)
 750 {
 751         struct hci_conn_hash *h = &hdev->conn_hash;
 752         switch (type) {
 753         case ACL_LINK:
 754                 return h->acl_num;
 755         case AMP_LINK:
 756                 return h->amp_num;
 757         case LE_LINK:
 758                 return h->le_num;
 759         case SCO_LINK:
 760         case ESCO_LINK:
 761                 return h->sco_num;
 762         default:
 763                 return 0;
 764         }
 765 }
 766
 767 static inline unsigned int hci_conn_count(struct hci_dev *hdev)
 768 {
 769         struct hci_conn_hash *c = &hdev->conn_hash;
 770
 771         return c->acl_num + c->amp_num + c->sco_num + c->le_num;
 772 }
 773
 774 static inline __u8 hci_conn_lookup_type(struct hci_dev *hdev, __u16 handle)
 775 {
 776         struct hci_conn_hash *h = &hdev->conn_hash;
 777         struct hci_conn *c;
 778         __u8 type = INVALID_LINK;
 779
 780         rcu_read_lock();
 781
 782         list_for_each_entry_rcu(c, &h->list, list) {
 783                 if (c->handle == handle) {
 784                         type = c->type;
 785                         break;
 786                 }
 787         }
 788
 789         rcu_read_unlock();
 790
 791         return type;
 792 }
 793
 794 static inline struct hci_conn *hci_conn_hash_lookup_handle(struct hci_dev *hdev,
 795                                                                 __u16 handle)
 796 {
 797         struct hci_conn_hash *h = &hdev->conn_hash;
 798         struct hci_conn  *c;
 799
 800         rcu_read_lock();
 801
 802         list_for_each_entry_rcu(c, &h->list, list) {
 803                 if (c->handle == handle) {
 804                         rcu_read_unlock();
 805                         return c;
 806                 }
 807         }
 808         rcu_read_unlock();
 809
 810         return NULL;
 811 }
 812
 813 static inline struct hci_conn *hci_conn_hash_lookup_ba(struct hci_dev *hdev,
 814                                                         __u8 type, bdaddr_t *ba)
 815 {
 816         struct hci_conn_hash *h = &hdev->conn_hash;
 817         struct hci_conn  *c;
 818
 819         rcu_read_lock();
 820
 821         list_for_each_entry_rcu(c, &h->list, list) {
 822                 if (c->type == type && !bacmp(&c->dst, ba)) {
 823                         rcu_read_unlock();
 824                         return c;
 825                 }
 826         }
 827
 828         rcu_read_unlock();
 829
 830         return NULL;
 831 }
 832
 833 static inline struct hci_conn *hci_conn_hash_lookup_le(struct hci_dev *hdev,
 834                                                        bdaddr_t *ba,
 835                                                        __u8 ba_type)
 836 {
 837         struct hci_conn_hash *h = &hdev->conn_hash;
 838         struct hci_conn  *c;
 839
 840         rcu_read_lock();
 841
 842         list_for_each_entry_rcu(c, &h->list, list) {
 843                 if (c->type != LE_LINK)
 844                        continue;
 845
 846                 if (ba_type == c->dst_type && !bacmp(&c->dst, ba)) {
 847                         rcu_read_unlock();
 848                         return c;
 849                 }
 850         }
 851
 852         rcu_read_unlock();
 853
 854         return NULL;
 855 }
 856
 857 static inline struct hci_conn *hci_conn_hash_lookup_state(struct hci_dev *hdev,
 858                                                         __u8 type, __u16 state)
 859 {
 860         struct hci_conn_hash *h = &hdev->conn_hash;
 861         struct hci_conn  *c;
 862
 863         rcu_read_lock();
 864
 865         list_for_each_entry_rcu(c, &h->list, list) {
 866                 if (c->type == type && c->state == state) {
 867                         rcu_read_unlock();
 868                         return c;
 869                 }
 870         }
 871
 872         rcu_read_unlock();
 873
 874         return NULL;
 875 }
 876
 877 static inline struct hci_conn *hci_lookup_le_connect(struct hci_dev *hdev)
 878 {
 879         struct hci_conn_hash *h = &hdev->conn_hash;
 880         struct hci_conn  *c;
 881
 882         rcu_read_lock();
 883
 884         list_for_each_entry_rcu(c, &h->list, list) {
 885                 if (c->type == LE_LINK && c->state == BT_CONNECT &&
 886                     !test_bit(HCI_CONN_SCANNING, &c->flags)) {
 887                         rcu_read_unlock();
 888                         return c;
 889                 }
 890         }
 891
 892         rcu_read_unlock();
 893
 894         return NULL;
 895 }
 896
 897 int hci_disconnect(struct hci_conn *conn, __u8 reason);
 898 bool hci_setup_sync(struct hci_conn *conn, __u16 handle);
 899 void hci_sco_setup(struct hci_conn *conn, __u8 status);
 900
 901 struct hci_conn *hci_conn_add(struct hci_dev *hdev, int type, bdaddr_t *dst,
 902                               u8 role);
 903 int hci_conn_del(struct hci_conn *conn);
 904 void hci_conn_hash_flush(struct hci_dev *hdev);
 905 void hci_conn_check_pending(struct hci_dev *hdev);
 906
 907 struct hci_chan *hci_chan_create(struct hci_conn *conn);
 908 void hci_chan_del(struct hci_chan *chan);
 909 void hci_chan_list_flush(struct hci_conn *conn);
 910 struct hci_chan *hci_chan_lookup_handle(struct hci_dev *hdev, __u16 handle);
 911
 912 struct hci_conn *hci_connect_le_scan(struct hci_dev *hdev, bdaddr_t *dst,
 913                                      u8 dst_type, u8 sec_level,
 914                                      u16 conn_timeout);
 915 struct hci_conn *hci_connect_le(struct hci_dev *hdev, bdaddr_t *dst,
 916                                 u8 dst_type, u8 sec_level, u16 conn_timeout,
 917                                 u8 role, bdaddr_t *direct_rpa);
 918 struct hci_conn *hci_connect_acl(struct hci_dev *hdev, bdaddr_t *dst,
 919                                  u8 sec_level, u8 auth_type);
 920 struct hci_conn *hci_connect_sco(struct hci_dev *hdev, int type, bdaddr_t *dst,
 921                                  __u16 setting);
 922 int hci_conn_check_link_mode(struct hci_conn *conn);
 923 int hci_conn_check_secure(struct hci_conn *conn, __u8 sec_level);
 924 int hci_conn_security(struct hci_conn *conn, __u8 sec_level, __u8 auth_type,
 925                       bool initiator);
 926 int hci_conn_switch_role(struct hci_conn *conn, __u8 role);
 927
 928 void hci_conn_enter_active_mode(struct hci_conn *conn, __u8 force_active);
 929
 930 void hci_le_conn_failed(struct hci_conn *conn, u8 status);
 931
 932 /*
 933  * hci_conn_get() and hci_conn_put() are used to control the life-time of an
 934  * "hci_conn" object. They do not guarantee that the hci_conn object is running,
 935  * working or anything else. They just guarantee that the object is available
 936  * and can be dereferenced. So you can use its locks, local variables and any
 937  * other constant data.
 938  * Before accessing runtime data, you _must_ lock the object and then check that
 939  * it is still running. As soon as you release the locks, the connection might
 940  * get dropped, though.
 941  *
 942  * On the other hand, hci_conn_hold() and hci_conn_drop() are used to control
 943  * how long the underlying connection is held. So every channel that runs on the
 944  * hci_conn object calls this to prevent the connection from disappearing. As
 945  * long as you hold a device, you must also guarantee that you have a valid
 946  * reference to the device via hci_conn_get() (or the initial reference from
 947  * hci_conn_add()).
 948  * The hold()/drop() ref-count is known to drop below 0 sometimes, which doesn't
 949  * break because nobody cares for that. But this means, we cannot use
 950  * _get()/_drop() in it, but require the caller to have a valid ref (FIXME).
 951  */
 952
 953 static inline struct hci_conn *hci_conn_get(struct hci_conn *conn)
 954 {
 955         get_device(&conn->dev);
 956         return conn;
 957 }
 958
 959 static inline void hci_conn_put(struct hci_conn *conn)
 960 {
 961         put_device(&conn->dev);
 962 }
 963
 964 static inline void hci_conn_hold(struct hci_conn *conn)
 965 {
 966         BT_DBG("hcon %p orig refcnt %d", conn, atomic_read(&conn->refcnt));
 967
 968         atomic_inc(&conn->refcnt);
 969         cancel_delayed_work(&conn->disc_work);
 970 }
 971
 972 static inline void hci_conn_drop(struct hci_conn *conn)
 973 {
 974         BT_DBG("hcon %p orig refcnt %d", conn, atomic_read(&conn->refcnt));
 975
 976         if (atomic_dec_and_test(&conn->refcnt)) {
 977                 unsigned long timeo;
 978
 979                 switch (conn->type) {
 980                 case ACL_LINK:
 981                 case LE_LINK:
 982                         cancel_delayed_work(&conn->idle_work);
 983                         if (conn->state == BT_CONNECTED) {
 984                                 timeo = conn->disc_timeout;
 985                                 if (!conn->out)
 986                                         timeo *= 2;
 987                         } else {
 988                                 timeo = 0;
 989                         }
 990                         break;
 991
 992                 case AMP_LINK:
 993                         timeo = conn->disc_timeout;
 994                         break;
 995
 996                 default:
 997                         timeo = 0;
 998                         break;
 999                 }
1000
1001                 cancel_delayed_work(&conn->disc_work);
1002                 queue_delayed_work(conn->hdev->workqueue,
1003                                    &conn->disc_work, timeo);
1004         }
1005 }
1006
1007 /* ----- HCI Devices ----- */
1008 static inline void hci_dev_put(struct hci_dev *d)
1009 {
1010         BT_DBG("%s orig refcnt %d", d->name,
1011                kref_read(&d->dev.kobj.kref));
1012
1013         put_device(&d->dev);
1014 }
1015
1016 static inline struct hci_dev *hci_dev_hold(struct hci_dev *d)
1017 {
1018         BT_DBG("%s orig refcnt %d", d->name,
1019                kref_read(&d->dev.kobj.kref));
1020
1021         get_device(&d->dev);
1022         return d;
1023 }
1024
1025 #define hci_dev_lock(d)         mutex_lock(&d->lock)
1026 #define hci_dev_unlock(d)       mutex_unlock(&d->lock)
1027
1028 #define to_hci_dev(d) container_of(d, struct hci_dev, dev)
1029 #define to_hci_conn(c) container_of(c, struct hci_conn, dev)
1030
1031 static inline void *hci_get_drvdata(struct hci_dev *hdev)
1032 {
1033         return dev_get_drvdata(&hdev->dev);
1034 }
1035
1036 static inline void hci_set_drvdata(struct hci_dev *hdev, void *data)
1037 {
1038         dev_set_drvdata(&hdev->dev, data);
1039 }
1040
1041 struct hci_dev *hci_dev_get(int index);
1042 struct hci_dev *hci_get_route(bdaddr_t *dst, bdaddr_t *src, u8 src_type);
1043
1044 struct hci_dev *hci_alloc_dev(void);
1045 void hci_free_dev(struct hci_dev *hdev);
1046 int hci_register_dev(struct hci_dev *hdev);
1047 void hci_unregister_dev(struct hci_dev *hdev);
1048 void hci_cleanup_dev(struct hci_dev *hdev);
1049 int hci_suspend_dev(struct hci_dev *hdev);
1050 int hci_resume_dev(struct hci_dev *hdev);
1051 int hci_reset_dev(struct hci_dev *hdev);
1052 int hci_recv_frame(struct hci_dev *hdev, struct sk_buff *skb);
1053 int hci_recv_diag(struct hci_dev *hdev, struct sk_buff *skb);
1054 __printf(2, 3) void hci_set_hw_info(struct hci_dev *hdev, const char *fmt, ...);
1055 __printf(2, 3) void hci_set_fw_info(struct hci_dev *hdev, const char *fmt, ...);
1056 int hci_dev_open(__u16 dev);
1057 int hci_dev_close(__u16 dev);
1058 int hci_dev_do_close(struct hci_dev *hdev);
1059 int hci_dev_reset(__u16 dev);
1060 int hci_dev_reset_stat(__u16 dev);
1061 int hci_dev_cmd(unsigned int cmd, void __user *arg);
1062 int hci_get_dev_list(void __user *arg);
1063 int hci_get_dev_info(void __user *arg);
1064 int hci_get_conn_list(void __user *arg);
1065 int hci_get_conn_info(struct hci_dev *hdev, void __user *arg);
1066 int hci_get_auth_info(struct hci_dev *hdev, void __user *arg);
1067 int hci_inquiry(void __user *arg);
1068
1069 struct bdaddr_list *hci_bdaddr_list_lookup(struct list_head *list,
1070                                            bdaddr_t *bdaddr, u8 type);
1071 int hci_bdaddr_list_add(struct list_head *list, bdaddr_t *bdaddr, u8 type);
1072 int hci_bdaddr_list_del(struct list_head *list, bdaddr_t *bdaddr, u8 type);
1073 void hci_bdaddr_list_clear(struct list_head *list);
1074
1075 struct hci_conn_params *hci_conn_params_lookup(struct hci_dev *hdev,
1076                                                bdaddr_t *addr, u8 addr_type);
1077 struct hci_conn_params *hci_conn_params_add(struct hci_dev *hdev,
1078                                             bdaddr_t *addr, u8 addr_type);
1079 void hci_conn_params_del(struct hci_dev *hdev, bdaddr_t *addr, u8 addr_type);
1080 void hci_conn_params_clear_disabled(struct hci_dev *hdev);
1081
1082 struct hci_conn_params *hci_pend_le_action_lookup(struct list_head *list,
1083                                                   bdaddr_t *addr,
1084                                                   u8 addr_type);
1085
1086 void hci_uuids_clear(struct hci_dev *hdev);
1087
1088 void hci_link_keys_clear(struct hci_dev *hdev);
1089 struct link_key *hci_find_link_key(struct hci_dev *hdev, bdaddr_t *bdaddr);
1090 struct link_key *hci_add_link_key(struct hci_dev *hdev, struct hci_conn *conn,
1091                                   bdaddr_t *bdaddr, u8 *val, u8 type,
1092                                   u8 pin_len, bool *persistent);
1093 struct smp_ltk *hci_add_ltk(struct hci_dev *hdev, bdaddr_t *bdaddr,
1094                             u8 addr_type, u8 type, u8 authenticated,
1095                             u8 tk[16], u8 enc_size, __le16 ediv, __le64 rand);
1096 struct smp_ltk *hci_find_ltk(struct hci_dev *hdev, bdaddr_t *bdaddr,
1097                              u8 addr_type, u8 role);
1098 int hci_remove_ltk(struct hci_dev *hdev, bdaddr_t *bdaddr, u8 bdaddr_type);
1099 void hci_smp_ltks_clear(struct hci_dev *hdev);
1100 int hci_remove_link_key(struct hci_dev *hdev, bdaddr_t *bdaddr);
1101
1102 struct smp_irk *hci_find_irk_by_rpa(struct hci_dev *hdev, bdaddr_t *rpa);
1103 struct smp_irk *hci_find_irk_by_addr(struct hci_dev *hdev, bdaddr_t *bdaddr,
1104                                      u8 addr_type);
1105 struct smp_irk *hci_add_irk(struct hci_dev *hdev, bdaddr_t *bdaddr,
1106                             u8 addr_type, u8 val[16], bdaddr_t *rpa);
1107 void hci_remove_irk(struct hci_dev *hdev, bdaddr_t *bdaddr, u8 addr_type);
1108 void hci_smp_irks_clear(struct hci_dev *hdev);
1109
1110 bool hci_bdaddr_is_paired(struct hci_dev *hdev, bdaddr_t *bdaddr, u8 type);
1111
1112 void hci_remote_oob_data_clear(struct hci_dev *hdev);
1113 struct oob_data *hci_find_remote_oob_data(struct hci_dev *hdev,
1114                                           bdaddr_t *bdaddr, u8 bdaddr_type);
1115 int hci_add_remote_oob_data(struct hci_dev *hdev, bdaddr_t *bdaddr,
1116                             u8 bdaddr_type, u8 *hash192, u8 *rand192,
1117                             u8 *hash256, u8 *rand256);
1118 int hci_remove_remote_oob_data(struct hci_dev *hdev, bdaddr_t *bdaddr,
1119                                u8 bdaddr_type);
1120
1121 void hci_adv_instances_clear(struct hci_dev *hdev);
1122 struct adv_info *hci_find_adv_instance(struct hci_dev *hdev, u8 instance);
1123 struct adv_info *hci_get_next_instance(struct hci_dev *hdev, u8 instance);
1124 int hci_add_adv_instance(struct hci_dev *hdev, u8 instance, u32 flags,
1125                          u16 adv_data_len, u8 *adv_data,
1126                          u16 scan_rsp_len, u8 *scan_rsp_data,
1127                          u16 timeout, u16 duration);
1128 int hci_remove_adv_instance(struct hci_dev *hdev, u8 instance);
1129 void hci_adv_instances_set_rpa_expired(struct hci_dev *hdev, bool rpa_expired);
1130
1131 void hci_event_packet(struct hci_dev *hdev, struct sk_buff *skb);
1132
1133 void hci_init_sysfs(struct hci_dev *hdev);
1134 void hci_conn_init_sysfs(struct hci_conn *conn);
1135 void hci_conn_add_sysfs(struct hci_conn *conn);
1136 void hci_conn_del_sysfs(struct hci_conn *conn);
1137
1138 #define SET_HCIDEV_DEV(hdev, pdev) ((hdev)->dev.parent = (pdev))
1139
1140 /* ----- LMP capabilities ----- */
1141 #define lmp_encrypt_capable(dev)   ((dev)->features[0][0] & LMP_ENCRYPT)
1142 #define lmp_rswitch_capable(dev)   ((dev)->features[0][0] & LMP_RSWITCH)
1143 #define lmp_hold_capable(dev)      ((dev)->features[0][0] & LMP_HOLD)
1144 #define lmp_sniff_capable(dev)     ((dev)->features[0][0] & LMP_SNIFF)
1145 #define lmp_park_capable(dev)      ((dev)->features[0][1] & LMP_PARK)
1146 #define lmp_inq_rssi_capable(dev)  ((dev)->features[0][3] & LMP_RSSI_INQ)
1147 #define lmp_esco_capable(dev)      ((dev)->features[0][3] & LMP_ESCO)
1148 #define lmp_bredr_capable(dev)     (!((dev)->features[0][4] & LMP_NO_BREDR))
1149 #define lmp_le_capable(dev)        ((dev)->features[0][4] & LMP_LE)
1150 #define lmp_sniffsubr_capable(dev) ((dev)->features[0][5] & LMP_SNIFF_SUBR)
1151 #define lmp_pause_enc_capable(dev) ((dev)->features[0][5] & LMP_PAUSE_ENC)
1152 #define lmp_ext_inq_capable(dev)   ((dev)->features[0][6] & LMP_EXT_INQ)
1153 #define lmp_le_br_capable(dev)     (!!((dev)->features[0][6] & LMP_SIMUL_LE_BR))
1154 #define lmp_ssp_capable(dev)       ((dev)->features[0][6] & LMP_SIMPLE_PAIR)
1155 #define lmp_no_flush_capable(dev)  ((dev)->features[0][6] & LMP_NO_FLUSH)
1156 #define lmp_lsto_capable(dev)      ((dev)->features[0][7] & LMP_LSTO)
1157 #define lmp_inq_tx_pwr_capable(dev) ((dev)->features[0][7] & LMP_INQ_TX_PWR)
1158 #define lmp_ext_feat_capable(dev)  ((dev)->features[0][7] & LMP_EXTFEATURES)
1159 #define lmp_transp_capable(dev)    ((dev)->features[0][2] & LMP_TRANSPARENT)
1160 #define lmp_edr_2m_capable(dev)    ((dev)->features[0][3] & LMP_EDR_2M)
1161 #define lmp_edr_3m_capable(dev)    ((dev)->features[0][3] & LMP_EDR_3M)
1162 #define lmp_edr_3slot_capable(dev) ((dev)->features[0][4] & LMP_EDR_3SLOT)
1163 #define lmp_edr_5slot_capable(dev) ((dev)->features[0][5] & LMP_EDR_5SLOT)
1164
1165 /* ----- Extended LMP capabilities ----- */
1166 #define lmp_csb_master_capable(dev) ((dev)->features[2][0] & LMP_CSB_MASTER)
1167 #define lmp_csb_slave_capable(dev)  ((dev)->features[2][0] & LMP_CSB_SLAVE)
1168 #define lmp_sync_train_capable(dev) ((dev)->features[2][0] & LMP_SYNC_TRAIN)
1169 #define lmp_sync_scan_capable(dev)  ((dev)->features[2][0] & LMP_SYNC_SCAN)
1170 #define lmp_sc_capable(dev)         ((dev)->features[2][1] & LMP_SC)
1171 #define lmp_ping_capable(dev)       ((dev)->features[2][1] & LMP_PING)
1172
1173 /* ----- Host capabilities ----- */
1174 #define lmp_host_ssp_capable(dev)  ((dev)->features[1][0] & LMP_HOST_SSP)
1175 #define lmp_host_sc_capable(dev)   ((dev)->features[1][0] & LMP_HOST_SC)
1176 #define lmp_host_le_capable(dev)   (!!((dev)->features[1][0] & LMP_HOST_LE))
1177 #define lmp_host_le_br_capable(dev) (!!((dev)->features[1][0] & LMP_HOST_LE_BREDR))
1178
1179 #define hdev_is_powered(dev)   (test_bit(HCI_UP, &(dev)->flags) && \
1180                                 !hci_dev_test_flag(dev, HCI_AUTO_OFF))
1181 #define bredr_sc_enabled(dev)  (lmp_sc_capable(dev) && \
1182                                 hci_dev_test_flag(dev, HCI_SC_ENABLED))
1183
1184 #define scan_1m(dev) (((dev)->le_tx_def_phys & HCI_LE_SET_PHY_1M) || \
1185                       ((dev)->le_rx_def_phys & HCI_LE_SET_PHY_1M))
1186
1187 #define scan_2m(dev) (((dev)->le_tx_def_phys & HCI_LE_SET_PHY_2M) || \
1188                       ((dev)->le_rx_def_phys & HCI_LE_SET_PHY_2M))
1189
1190 #define scan_coded(dev) (((dev)->le_tx_def_phys & HCI_LE_SET_PHY_CODED) || \
1191                          ((dev)->le_rx_def_phys & HCI_LE_SET_PHY_CODED))
1192
1193 /* Use ext scanning if set ext scan param and ext scan enable is supported */
1194 #define use_ext_scan(dev) (((dev)->commands[37] & 0x20) && \
1195                            ((dev)->commands[37] & 0x40))
1196 /* Use ext create connection if command is supported */
1197 #define use_ext_conn(dev) ((dev)->commands[37] & 0x80)
1198
1199 /* Extended advertising support */
1200 #define ext_adv_capable(dev) (((dev)->le_features[1] & HCI_LE_EXT_ADV))
1201
1202 /* ----- HCI protocols ----- */
1203 #define HCI_PROTO_DEFER             0x01
1204
1205 static inline int hci_proto_connect_ind(struct hci_dev *hdev, bdaddr_t *bdaddr,
1206                                         __u8 type, __u8 *flags)
1207 {
1208         switch (type) {
1209         case ACL_LINK:
1210                 return l2cap_connect_ind(hdev, bdaddr);
1211
1212         case SCO_LINK:
1213         case ESCO_LINK:
1214                 return sco_connect_ind(hdev, bdaddr, flags);
1215
1216         default:
1217                 BT_ERR("unknown link type %d", type);
1218                 return -EINVAL;
1219         }
1220 }
1221
1222 static inline int hci_proto_disconn_ind(struct hci_conn *conn)
1223 {
1224         if (conn->type != ACL_LINK && conn->type != LE_LINK)
1225                 return HCI_ERROR_REMOTE_USER_TERM;
1226
1227         return l2cap_disconn_ind(conn);
1228 }
1229
1230 /* ----- HCI callbacks ----- */
1231 struct hci_cb {
1232         struct list_head list;
1233
1234         char *name;
1235
1236         void (*connect_cfm)     (struct hci_conn *conn, __u8 status);
1237         void (*disconn_cfm)     (struct hci_conn *conn, __u8 status);
1238         void (*security_cfm)    (struct hci_conn *conn, __u8 status,
1239                                                                 __u8 encrypt);
1240         void (*key_change_cfm)  (struct hci_conn *conn, __u8 status);
1241         void (*role_switch_cfm) (struct hci_conn *conn, __u8 status, __u8 role);
1242 };
1243
1244 static inline void hci_connect_cfm(struct hci_conn *conn, __u8 status)
1245 {
1246         struct hci_cb *cb;
1247
1248         mutex_lock(&hci_cb_list_lock);
1249         list_for_each_entry(cb, &hci_cb_list, list) {
1250                 if (cb->connect_cfm)
1251                         cb->connect_cfm(conn, status);
1252         }
1253         mutex_unlock(&hci_cb_list_lock);
1254
1255         if (conn->connect_cfm_cb)
1256                 conn->connect_cfm_cb(conn, status);
1257 }
1258
1259 static inline void hci_disconn_cfm(struct hci_conn *conn, __u8 reason)
1260 {
1261         struct hci_cb *cb;
1262
1263         mutex_lock(&hci_cb_list_lock);
1264         list_for_each_entry(cb, &hci_cb_list, list) {
1265                 if (cb->disconn_cfm)
1266                         cb->disconn_cfm(conn, reason);
1267         }
1268         mutex_unlock(&hci_cb_list_lock);
1269
1270         if (conn->disconn_cfm_cb)
1271                 conn->disconn_cfm_cb(conn, reason);
1272 }
1273
1274 static inline void hci_auth_cfm(struct hci_conn *conn, __u8 status)
1275 {
1276         struct hci_cb *cb;
1277         __u8 encrypt;
1278
1279         if (test_bit(HCI_CONN_ENCRYPT_PEND, &conn->flags))
1280                 return;
1281
1282         encrypt = test_bit(HCI_CONN_ENCRYPT, &conn->flags) ? 0x01 : 0x00;
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_encrypt_cfm(struct hci_conn *conn, __u8 status)
1296 {
1297         struct hci_cb *cb;
1298         __u8 encrypt;
1299
1300         if (conn->state == BT_CONFIG) {
1301                 if (!status)
1302                         conn->state = BT_CONNECTED;
1303
1304                 hci_connect_cfm(conn, status);
1305                 hci_conn_drop(conn);
1306                 return;
1307         }
1308
1309         if (!test_bit(HCI_CONN_ENCRYPT, &conn->flags))
1310                 encrypt = 0x00;
1311         else if (test_bit(HCI_CONN_AES_CCM, &conn->flags))
1312                 encrypt = 0x02;
1313         else
1314                 encrypt = 0x01;
1315
1316         if (!status) {
1317                 if (conn->sec_level == BT_SECURITY_SDP)
1318                         conn->sec_level = BT_SECURITY_LOW;
1319
1320                 if (conn->pending_sec_level > conn->sec_level)
1321                         conn->sec_level = conn->pending_sec_level;
1322         }
1323
1324         mutex_lock(&hci_cb_list_lock);
1325         list_for_each_entry(cb, &hci_cb_list, list) {
1326                 if (cb->security_cfm)
1327                         cb->security_cfm(conn, status, encrypt);
1328         }
1329         mutex_unlock(&hci_cb_list_lock);
1330
1331         if (conn->security_cfm_cb)
1332                 conn->security_cfm_cb(conn, status);
1333 }
1334
1335 static inline void hci_key_change_cfm(struct hci_conn *conn, __u8 status)
1336 {
1337         struct hci_cb *cb;
1338
1339         mutex_lock(&hci_cb_list_lock);
1340         list_for_each_entry(cb, &hci_cb_list, list) {
1341                 if (cb->key_change_cfm)
1342                         cb->key_change_cfm(conn, status);
1343         }
1344         mutex_unlock(&hci_cb_list_lock);
1345 }
1346
1347 static inline void hci_role_switch_cfm(struct hci_conn *conn, __u8 status,
1348                                                                 __u8 role)
1349 {
1350         struct hci_cb *cb;
1351
1352         mutex_lock(&hci_cb_list_lock);
1353         list_for_each_entry(cb, &hci_cb_list, list) {
1354                 if (cb->role_switch_cfm)
1355                         cb->role_switch_cfm(conn, status, role);
1356         }
1357         mutex_unlock(&hci_cb_list_lock);
1358 }
1359
1360 static inline void *eir_get_data(u8 *eir, size_t eir_len, u8 type,
1361                                  size_t *data_len)
1362 {
1363         size_t parsed = 0;
1364
1365         if (eir_len < 2)
1366                 return NULL;
1367
1368         while (parsed < eir_len - 1) {
1369                 u8 field_len = eir[0];
1370
1371                 if (field_len == 0)
1372                         break;
1373
1374                 parsed += field_len + 1;
1375
1376                 if (parsed > eir_len)
1377                         break;
1378
1379                 if (eir[1] != type) {
1380                         eir += field_len + 1;
1381                         continue;
1382                 }
1383
1384                 /* Zero length data */
1385                 if (field_len == 1)
1386                         return NULL;
1387
1388                 if (data_len)
1389                         *data_len = field_len - 1;
1390
1391                 return &eir[2];
1392         }
1393
1394         return NULL;
1395 }
1396
1397 static inline bool hci_bdaddr_is_rpa(bdaddr_t *bdaddr, u8 addr_type)
1398 {
1399         if (addr_type != ADDR_LE_DEV_RANDOM)
1400                 return false;
1401
1402         if ((bdaddr->b[5] & 0xc0) == 0x40)
1403                return true;
1404
1405         return false;
1406 }
1407
1408 static inline bool hci_is_identity_address(bdaddr_t *addr, u8 addr_type)
1409 {
1410         if (addr_type == ADDR_LE_DEV_PUBLIC)
1411                 return true;
1412
1413         /* Check for Random Static address type */
1414         if ((addr->b[5] & 0xc0) == 0xc0)
1415                 return true;
1416
1417         return false;
1418 }
1419
1420 static inline struct smp_irk *hci_get_irk(struct hci_dev *hdev,
1421                                           bdaddr_t *bdaddr, u8 addr_type)
1422 {
1423         if (!hci_bdaddr_is_rpa(bdaddr, addr_type))
1424                 return NULL;
1425
1426         return hci_find_irk_by_rpa(hdev, bdaddr);
1427 }
1428
1429 static inline int hci_check_conn_params(u16 min, u16 max, u16 latency,
1430                                         u16 to_multiplier)
1431 {
1432         u16 max_latency;
1433
1434         if (min > max || min < 6 || max > 3200)
1435                 return -EINVAL;
1436
1437         if (to_multiplier < 10 || to_multiplier > 3200)
1438                 return -EINVAL;
1439
1440         if (max >= to_multiplier * 8)
1441                 return -EINVAL;
1442
1443         max_latency = (to_multiplier * 4 / max) - 1;
1444         if (latency > 499 || latency > max_latency)
1445                 return -EINVAL;
1446
1447         return 0;
1448 }
1449
1450 int hci_register_cb(struct hci_cb *hcb);
1451 int hci_unregister_cb(struct hci_cb *hcb);
1452
1453 struct sk_buff *__hci_cmd_sync(struct hci_dev *hdev, u16 opcode, u32 plen,
1454                                const void *param, u32 timeout);
1455 struct sk_buff *__hci_cmd_sync_ev(struct hci_dev *hdev, u16 opcode, u32 plen,
1456                                   const void *param, u8 event, u32 timeout);
1457 int __hci_cmd_send(struct hci_dev *hdev, u16 opcode, u32 plen,
1458                    const void *param);
1459
1460 int hci_send_cmd(struct hci_dev *hdev, __u16 opcode, __u32 plen,
1461                  const void *param);
1462 void hci_send_acl(struct hci_chan *chan, struct sk_buff *skb, __u16 flags);
1463 void hci_send_sco(struct hci_conn *conn, struct sk_buff *skb);
1464
1465 void *hci_sent_cmd_data(struct hci_dev *hdev, __u16 opcode);
1466
1467 struct sk_buff *hci_cmd_sync(struct hci_dev *hdev, u16 opcode, u32 plen,
1468                              const void *param, u32 timeout);
1469
1470 /* ----- HCI Sockets ----- */
1471 void hci_send_to_sock(struct hci_dev *hdev, struct sk_buff *skb);
1472 void hci_send_to_channel(unsigned short channel, struct sk_buff *skb,
1473                          int flag, struct sock *skip_sk);
1474 void hci_send_to_monitor(struct hci_dev *hdev, struct sk_buff *skb);
1475 void hci_send_monitor_ctrl_event(struct hci_dev *hdev, u16 event,
1476                                  void *data, u16 data_len, ktime_t tstamp,
1477                                  int flag, struct sock *skip_sk);
1478
1479 void hci_sock_dev_event(struct hci_dev *hdev, int event);
1480
1481 #define HCI_MGMT_VAR_LEN        BIT(0)
1482 #define HCI_MGMT_NO_HDEV        BIT(1)
1483 #define HCI_MGMT_UNTRUSTED      BIT(2)
1484 #define HCI_MGMT_UNCONFIGURED   BIT(3)
1485
1486 struct hci_mgmt_handler {
1487         int (*func) (struct sock *sk, struct hci_dev *hdev, void *data,
1488                      u16 data_len);
1489         size_t data_len;
1490         unsigned long flags;
1491 };
1492
1493 struct hci_mgmt_chan {
1494         struct list_head list;
1495         unsigned short channel;
1496         size_t handler_count;
1497         const struct hci_mgmt_handler *handlers;
1498         void (*hdev_init) (struct sock *sk, struct hci_dev *hdev);
1499 };
1500
1501 int hci_mgmt_chan_register(struct hci_mgmt_chan *c);
1502 void hci_mgmt_chan_unregister(struct hci_mgmt_chan *c);
1503
1504 /* Management interface */
1505 #define DISCOV_TYPE_BREDR               (BIT(BDADDR_BREDR))
1506 #define DISCOV_TYPE_LE                  (BIT(BDADDR_LE_PUBLIC) | \
1507                                          BIT(BDADDR_LE_RANDOM))
1508 #define DISCOV_TYPE_INTERLEAVED         (BIT(BDADDR_BREDR) | \
1509                                          BIT(BDADDR_LE_PUBLIC) | \
1510                                          BIT(BDADDR_LE_RANDOM))
1511
1512 /* These LE scan and inquiry parameters were chosen according to LE General
1513  * Discovery Procedure specification.
1514  */
1515 #define DISCOV_LE_SCAN_WIN              0x12
1516 #define DISCOV_LE_SCAN_INT              0x12
1517 #define DISCOV_LE_TIMEOUT               10240   /* msec */
1518 #define DISCOV_INTERLEAVED_TIMEOUT      5120    /* msec */
1519 #define DISCOV_INTERLEAVED_INQUIRY_LEN  0x04
1520 #define DISCOV_BREDR_INQUIRY_LEN        0x08
1521 #define DISCOV_LE_RESTART_DELAY         msecs_to_jiffies(200)   /* msec */
1522
1523 void mgmt_fill_version_info(void *ver);
1524 int mgmt_new_settings(struct hci_dev *hdev);
1525 void mgmt_index_added(struct hci_dev *hdev);
1526 void mgmt_index_removed(struct hci_dev *hdev);
1527 void mgmt_set_powered_failed(struct hci_dev *hdev, int err);
1528 void mgmt_power_on(struct hci_dev *hdev, int err);
1529 void __mgmt_power_off(struct hci_dev *hdev);
1530 void mgmt_new_link_key(struct hci_dev *hdev, struct link_key *key,
1531                        bool persistent);
1532 void mgmt_device_connected(struct hci_dev *hdev, struct hci_conn *conn,
1533                            u32 flags, u8 *name, u8 name_len);
1534 void mgmt_device_disconnected(struct hci_dev *hdev, bdaddr_t *bdaddr,
1535                               u8 link_type, u8 addr_type, u8 reason,
1536                               bool mgmt_connected);
1537 void mgmt_disconnect_failed(struct hci_dev *hdev, bdaddr_t *bdaddr,
1538                             u8 link_type, u8 addr_type, u8 status);
1539 void mgmt_connect_failed(struct hci_dev *hdev, bdaddr_t *bdaddr, u8 link_type,
1540                          u8 addr_type, u8 status);
1541 void mgmt_pin_code_request(struct hci_dev *hdev, bdaddr_t *bdaddr, u8 secure);
1542 void mgmt_pin_code_reply_complete(struct hci_dev *hdev, bdaddr_t *bdaddr,
1543                                   u8 status);
1544 void mgmt_pin_code_neg_reply_complete(struct hci_dev *hdev, bdaddr_t *bdaddr,
1545                                       u8 status);
1546 int mgmt_user_confirm_request(struct hci_dev *hdev, bdaddr_t *bdaddr,
1547                               u8 link_type, u8 addr_type, u32 value,
1548                               u8 confirm_hint);
1549 int mgmt_user_confirm_reply_complete(struct hci_dev *hdev, bdaddr_t *bdaddr,
1550                                      u8 link_type, u8 addr_type, u8 status);
1551 int mgmt_user_confirm_neg_reply_complete(struct hci_dev *hdev, bdaddr_t *bdaddr,
1552                                          u8 link_type, u8 addr_type, u8 status);
1553 int mgmt_user_passkey_request(struct hci_dev *hdev, bdaddr_t *bdaddr,
1554                               u8 link_type, u8 addr_type);
1555 int mgmt_user_passkey_reply_complete(struct hci_dev *hdev, bdaddr_t *bdaddr,
1556                                      u8 link_type, u8 addr_type, u8 status);
1557 int mgmt_user_passkey_neg_reply_complete(struct hci_dev *hdev, bdaddr_t *bdaddr,
1558                                          u8 link_type, u8 addr_type, u8 status);
1559 int mgmt_user_passkey_notify(struct hci_dev *hdev, bdaddr_t *bdaddr,
1560                              u8 link_type, u8 addr_type, u32 passkey,
1561                              u8 entered);
1562 void mgmt_auth_failed(struct hci_conn *conn, u8 status);
1563 void mgmt_auth_enable_complete(struct hci_dev *hdev, u8 status);
1564 void mgmt_ssp_enable_complete(struct hci_dev *hdev, u8 enable, u8 status);
1565 void mgmt_set_class_of_dev_complete(struct hci_dev *hdev, u8 *dev_class,
1566                                     u8 status);
1567 void mgmt_set_local_name_complete(struct hci_dev *hdev, u8 *name, u8 status);
1568 void mgmt_start_discovery_complete(struct hci_dev *hdev, u8 status);
1569 void mgmt_stop_discovery_complete(struct hci_dev *hdev, u8 status);
1570 void mgmt_device_found(struct hci_dev *hdev, bdaddr_t *bdaddr, u8 link_type,
1571                        u8 addr_type, u8 *dev_class, s8 rssi, u32 flags,
1572                        u8 *eir, u16 eir_len, u8 *scan_rsp, u8 scan_rsp_len);
1573 void mgmt_remote_name(struct hci_dev *hdev, bdaddr_t *bdaddr, u8 link_type,
1574                       u8 addr_type, s8 rssi, u8 *name, u8 name_len);
1575 void mgmt_discovering(struct hci_dev *hdev, u8 discovering);
1576 bool mgmt_powering_down(struct hci_dev *hdev);
1577 void mgmt_new_ltk(struct hci_dev *hdev, struct smp_ltk *key, bool persistent);
1578 void mgmt_new_irk(struct hci_dev *hdev, struct smp_irk *irk, bool persistent);
1579 void mgmt_new_csrk(struct hci_dev *hdev, struct smp_csrk *csrk,
1580                    bool persistent);
1581 void mgmt_new_conn_param(struct hci_dev *hdev, bdaddr_t *bdaddr,
1582                          u8 bdaddr_type, u8 store_hint, u16 min_interval,
1583                          u16 max_interval, u16 latency, u16 timeout);
1584 void mgmt_smp_complete(struct hci_conn *conn, bool complete);
1585 bool mgmt_get_connectable(struct hci_dev *hdev);
1586 void mgmt_set_connectable_complete(struct hci_dev *hdev, u8 status);
1587 void mgmt_set_discoverable_complete(struct hci_dev *hdev, u8 status);
1588 u8 mgmt_get_adv_discov_flags(struct hci_dev *hdev);
1589 void mgmt_advertising_added(struct sock *sk, struct hci_dev *hdev,
1590                             u8 instance);
1591 void mgmt_advertising_removed(struct sock *sk, struct hci_dev *hdev,
1592                               u8 instance);
1593 int mgmt_phy_configuration_changed(struct hci_dev *hdev, struct sock *skip);
1594
1595 u8 hci_le_conn_update(struct hci_conn *conn, u16 min, u16 max, u16 latency,
1596                       u16 to_multiplier);
1597 void hci_le_start_enc(struct hci_conn *conn, __le16 ediv, __le64 rand,
1598                       __u8 ltk[16], __u8 key_size);
1599
1600 void hci_copy_identity_address(struct hci_dev *hdev, bdaddr_t *bdaddr,
1601                                u8 *bdaddr_type);
1602
1603 #define SCO_AIRMODE_MASK       0x0003
1604 #define SCO_AIRMODE_CVSD       0x0000
1605 #define SCO_AIRMODE_TRANSP     0x0003
1606
1607 #endif /* __HCI_CORE_H */