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