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