include/net/bluetooth/hci_core.h

   1 /*
   2    BlueZ - Bluetooth protocol stack for Linux
   3    Copyright (c) 2000-2001, 2010, Code Aurora Forum. All rights reserved.
   4
   5    Written 2000,2001 by Maxim Krasnyansky <maxk@qualcomm.com>
   6
   7    This program is free software; you can redistribute it and/or modify
   8    it under the terms of the GNU General Public License version 2 as
   9    published by the Free Software Foundation;
  10
  11    THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
  12    OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  13    FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT OF THIRD PARTY RIGHTS.
  14    IN NO EVENT SHALL THE COPYRIGHT HOLDER(S) AND AUTHOR(S) BE LIABLE FOR ANY
  15    CLAIM, OR ANY SPECIAL INDIRECT OR CONSEQUENTIAL DAMAGES, OR ANY DAMAGES
  16    WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
  17    ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
  18    OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
  19
  20    ALL LIABILITY, INCLUDING LIABILITY FOR INFRINGEMENT OF ANY PATENTS,
  21    COPYRIGHTS, TRADEMARKS OR OTHER RIGHTS, RELATING TO USE OF THIS
  22    SOFTWARE IS DISCLAIMED.
  23 */
  24
  25 #ifndef __HCI_CORE_H
  26 #define __HCI_CORE_H
  27
  28 #include <linux/leds.h>
  29 #include <net/bluetooth/hci.h>
  30 #include <net/bluetooth/hci_sock.h>
  31
  32 /* HCI priority */
  33 #define HCI_PRIO_MAX    7
  34
  35 /* HCI Core structures */
  36 struct inquiry_data {
  37         bdaddr_t        bdaddr;
  38         __u8            pscan_rep_mode;
  39         __u8            pscan_period_mode;
  40         __u8            pscan_mode;
  41         __u8            dev_class[3];
  42         __le16          clock_offset;
  43         __s8            rssi;
  44         __u8            ssp_mode;
  45 };
  46
  47 struct inquiry_entry {
  48         struct list_head        all;            /* inq_cache.all */
  49         struct list_head        list;           /* unknown or resolve */
  50         enum {
  51                 NAME_NOT_KNOWN,
  52                 NAME_NEEDED,
  53                 NAME_PENDING,
  54                 NAME_KNOWN,
  55         } name_state;
  56         __u32                   timestamp;
  57         struct inquiry_data     data;
  58 };
  59
  60 struct discovery_state {
  61         int                     type;
  62         enum {
  63                 DISCOVERY_STOPPED,
  64                 DISCOVERY_STARTING,
  65                 DISCOVERY_FINDING,
  66                 DISCOVERY_RESOLVING,
  67                 DISCOVERY_STOPPING,
  68         } state;
  69         struct list_head        all;    /* All devices found during inquiry */
  70         struct list_head        unknown;        /* Name state not known */
  71         struct list_head        resolve;        /* Name needs to be resolved */
  72         __u32                   timestamp;
  73         bdaddr_t                last_adv_addr;
  74         u8                      last_adv_addr_type;
  75         s8                      last_adv_rssi;
  76         u32                     last_adv_flags;
  77         u8                      last_adv_data[HCI_MAX_AD_LENGTH];
  78         u8                      last_adv_data_len;
  79         bool                    report_invalid_rssi;
  80         bool                    result_filtering;
  81         bool                    limited;
  82         s8                      rssi;
  83         u16                     uuid_count;
  84         u8                      (*uuids)[16];
  85         unsigned long           scan_start;
  86         unsigned long           scan_duration;
  87 };
  88
  89 struct hci_conn_hash {
  90         struct list_head list;
  91         unsigned int     acl_num;
  92         unsigned int     amp_num;
  93         unsigned int     sco_num;
  94         unsigned int     le_num;
  95         unsigned int     le_num_slave;
  96 };
  97
  98 struct bdaddr_list {
  99         struct list_head list;
 100         bdaddr_t bdaddr;
 101         u8 bdaddr_type;
 102 };
 103
 104 struct bt_uuid {
 105         struct list_head list;
 106         u8 uuid[16];
 107         u8 size;
 108         u8 svc_hint;
 109 };
 110
 111 struct smp_csrk {
 112         bdaddr_t bdaddr;
 113         u8 bdaddr_type;
 114         u8 type;
 115         u8 val[16];
 116 };
 117
 118 struct smp_ltk {
 119         struct list_head list;
 120         struct rcu_head rcu;
 121         bdaddr_t bdaddr;
 122         u8 bdaddr_type;
 123         u8 authenticated;
 124         u8 type;
 125         u8 enc_size;
 126         __le16 ediv;
 127         __le64 rand;
 128         u8 val[16];
 129 };
 130
 131 struct smp_irk {
 132         struct list_head list;
 133         struct rcu_head rcu;
 134         bdaddr_t rpa;
 135         bdaddr_t bdaddr;
 136         u8 addr_type;
 137         u8 val[16];
 138 };
 139
 140 struct link_key {
 141         struct list_head list;
 142         struct rcu_head rcu;
 143         bdaddr_t bdaddr;
 144         u8 type;
 145         u8 val[HCI_LINK_KEY_SIZE];
 146         u8 pin_len;
 147 };
 148
 149 struct oob_data {
 150         struct list_head list;
 151         bdaddr_t bdaddr;
 152         u8 bdaddr_type;
 153         u8 present;
 154         u8 hash192[16];
 155         u8 rand192[16];
 156         u8 hash256[16];
 157         u8 rand256[16];
 158 };
 159
 160 struct adv_info {
 161         struct list_head list;
 162         bool pending;
 163         __u8    instance;
 164         __u32   flags;
 165         __u16   timeout;
 166         __u16   remaining_time;
 167         __u16   duration;
 168         __u16   adv_data_len;
 169         __u8    adv_data[HCI_MAX_AD_LENGTH];
 170         __u16   scan_rsp_len;
 171         __u8    scan_rsp_data[HCI_MAX_AD_LENGTH];
 172 };
 173
 174 #define HCI_MAX_ADV_INSTANCES           5
 175 #define HCI_DEFAULT_ADV_DURATION        2
 176
 177 #define HCI_MAX_SHORT_NAME_LENGTH       10
 178
 179 /* Default LE RPA expiry time, 15 minutes */
 180 #define HCI_DEFAULT_RPA_TIMEOUT         (15 * 60)
 181
 182 /* Default min/max age of connection information (1s/3s) */
 183 #define DEFAULT_CONN_INFO_MIN_AGE       1000
 184 #define DEFAULT_CONN_INFO_MAX_AGE       3000
 185
 186 struct amp_assoc {
 187         __u16   len;
 188         __u16   offset;
 189         __u16   rem_len;
 190         __u16   len_so_far;
 191         __u8    data[HCI_MAX_AMP_ASSOC_SIZE];
 192 };
 193
 194 #define HCI_MAX_PAGES   3
 195
 196 struct hci_dev {
 197         struct list_head list;
 198         struct mutex    lock;
 199
 200         char            name[8];
 201         unsigned long   flags;
 202         __u16           id;
 203         __u8            bus;
 204         __u8            dev_type;
 205         bdaddr_t        bdaddr;
 206         bdaddr_t        setup_addr;
 207         bdaddr_t        public_addr;
 208         bdaddr_t        random_addr;
 209         bdaddr_t        static_addr;
 210         __u8            adv_addr_type;
 211         __u8            dev_name[HCI_MAX_NAME_LENGTH];
 212         __u8            short_name[HCI_MAX_SHORT_NAME_LENGTH];
 213         __u8            eir[HCI_MAX_EIR_LENGTH];
 214         __u8            dev_class[3];
 215         __u8            major_class;
 216         __u8            minor_class;
 217         __u8            max_page;
 218         __u8            features[HCI_MAX_PAGES][8];
 219         __u8            le_features[8];
 220         __u8            le_white_list_size;
 221         __u8            le_states[8];
 222         __u8            commands[64];
 223         __u8            hci_ver;
 224         __u16           hci_rev;
 225         __u8            lmp_ver;
 226         __u16           manufacturer;
 227         __u16           lmp_subver;
 228         __u16           voice_setting;
 229         __u8            num_iac;
 230         __u8            stored_max_keys;
 231         __u8            stored_num_keys;
 232         __u8            io_capability;
 233         __s8            inq_tx_power;
 234         __u16           page_scan_interval;
 235         __u16           page_scan_window;
 236         __u8            page_scan_type;
 237         __u8            le_adv_channel_map;
 238         __u16           le_adv_min_interval;
 239         __u16           le_adv_max_interval;
 240         __u8            le_scan_type;
 241         __u16           le_scan_interval;
 242         __u16           le_scan_window;
 243         __u16           le_conn_min_interval;
 244         __u16           le_conn_max_interval;
 245         __u16           le_conn_latency;
 246         __u16           le_supv_timeout;
 247         __u16           le_def_tx_len;
 248         __u16           le_def_tx_time;
 249         __u16           le_max_tx_len;
 250         __u16           le_max_tx_time;
 251         __u16           le_max_rx_len;
 252         __u16           le_max_rx_time;
 253         __u16           discov_interleaved_timeout;
 254         __u16           conn_info_min_age;
 255         __u16           conn_info_max_age;
 256         __u8            ssp_debug_mode;
 257         __u8            hw_error_code;
 258         __u32           clock;
 259
 260         __u16           devid_source;
 261         __u16           devid_vendor;
 262         __u16           devid_product;
 263         __u16           devid_version;
 264
 265         __u16           pkt_type;
 266         __u16           esco_type;
 267         __u16           link_policy;
 268         __u16           link_mode;
 269
 270         __u32           idle_timeout;
 271         __u16           sniff_min_interval;
 272         __u16           sniff_max_interval;
 273
 274         __u8            amp_status;
 275         __u32           amp_total_bw;
 276         __u32           amp_max_bw;
 277         __u32           amp_min_latency;
 278         __u32           amp_max_pdu;
 279         __u8            amp_type;
 280         __u16           amp_pal_cap;
 281         __u16           amp_assoc_size;
 282         __u32           amp_max_flush_to;
 283         __u32           amp_be_flush_to;
 284
 285         struct amp_assoc        loc_assoc;
 286
 287         __u8            flow_ctl_mode;
 288
 289         unsigned int    auto_accept_delay;
 290
 291         unsigned long   quirks;
 292
 293         atomic_t        cmd_cnt;
 294         unsigned int    acl_cnt;
 295         unsigned int    sco_cnt;
 296         unsigned int    le_cnt;
 297
 298         unsigned int    acl_mtu;
 299         unsigned int    sco_mtu;
 300         unsigned int    le_mtu;
 301         unsigned int    acl_pkts;
 302         unsigned int    sco_pkts;
 303         unsigned int    le_pkts;
 304
 305         __u16           block_len;
 306         __u16           block_mtu;
 307         __u16           num_blocks;
 308         __u16           block_cnt;
 309
 310         unsigned long   acl_last_tx;
 311         unsigned long   sco_last_tx;
 312         unsigned long   le_last_tx;
 313
 314         struct workqueue_struct *workqueue;
 315         struct workqueue_struct *req_workqueue;
 316
 317         struct work_struct      power_on;
 318         struct delayed_work     power_off;
 319         struct work_struct      error_reset;
 320
 321         __u16                   discov_timeout;
 322         struct delayed_work     discov_off;
 323
 324         struct delayed_work     service_cache;
 325
 326         struct delayed_work     cmd_timer;
 327
 328         struct work_struct      rx_work;
 329         struct work_struct      cmd_work;
 330         struct work_struct      tx_work;
 331
 332         struct work_struct      discov_update;
 333         struct work_struct      bg_scan_update;
 334         struct work_struct      scan_update;
 335         struct work_struct      connectable_update;
 336         struct work_struct      discoverable_update;
 337         struct delayed_work     le_scan_disable;
 338         struct delayed_work     le_scan_restart;
 339
 340         struct sk_buff_head     rx_q;
 341         struct sk_buff_head     raw_q;
 342         struct sk_buff_head     cmd_q;
 343
 344         struct sk_buff          *sent_cmd;
 345
 346         struct mutex            req_lock;
 347         wait_queue_head_t       req_wait_q;
 348         __u32                   req_status;
 349         __u32                   req_result;
 350         struct sk_buff          *req_skb;
 351
 352         void                    *smp_data;
 353         void                    *smp_bredr_data;
 354
 355         struct discovery_state  discovery;
 356         struct hci_conn_hash    conn_hash;
 357
 358         struct list_head        mgmt_pending;
 359         struct list_head        blacklist;
 360         struct list_head        whitelist;
 361         struct list_head        uuids;
 362         struct list_head        link_keys;
 363         struct list_head        long_term_keys;
 364         struct list_head        identity_resolving_keys;
 365         struct list_head        remote_oob_data;
 366         struct list_head        le_white_list;
 367         struct list_head        le_conn_params;
 368         struct list_head        pend_le_conns;
 369         struct list_head        pend_le_reports;
 370
 371         struct hci_dev_stats    stat;
 372
 373         atomic_t                promisc;
 374
 375         struct dentry           *debugfs;
 376
 377         struct device           dev;
 378
 379         struct rfkill           *rfkill;
 380
 381         DECLARE_BITMAP(dev_flags, __HCI_NUM_FLAGS);
 382
 383         __s8                    adv_tx_power;
 384         __u8                    adv_data[HCI_MAX_AD_LENGTH];
 385         __u8                    adv_data_len;
 386         __u8                    scan_rsp_data[HCI_MAX_AD_LENGTH];
 387         __u8                    scan_rsp_data_len;
 388
 389         struct list_head        adv_instances;
 390         unsigned int            adv_instance_cnt;
 391         __u8                    cur_adv_instance;
 392         __u16                   adv_instance_timeout;
 393         struct delayed_work     adv_instance_expire;
 394
 395         __u8                    irk[16];
 396         __u32                   rpa_timeout;
 397         struct delayed_work     rpa_expired;
 398         bdaddr_t                rpa;
 399
 400         struct led_trigger      *power_led;
 401
 402         int (*open)(struct hci_dev *hdev);
 403         int (*close)(struct hci_dev *hdev);
 404         int (*flush)(struct hci_dev *hdev);
 405         int (*setup)(struct hci_dev *hdev);
 406         int (*shutdown)(struct hci_dev *hdev);
 407         int (*send)(struct hci_dev *hdev, struct sk_buff *skb);
 408         void (*notify)(struct hci_dev *hdev, unsigned int evt);
 409         void (*hw_error)(struct hci_dev *hdev, u8 code);
 410         int (*post_init)(struct hci_dev *hdev);
 411         int (*set_diag)(struct hci_dev *hdev, bool enable);
 412         int (*set_bdaddr)(struct hci_dev *hdev, const bdaddr_t *bdaddr);
 413 };
 414
 415 #define HCI_PHY_HANDLE(handle)  (handle & 0xff)
 416
 417 struct hci_conn {
 418         struct list_head list;
 419
 420         atomic_t        refcnt;
 421
 422         bdaddr_t        dst;
 423         __u8            dst_type;
 424         bdaddr_t        src;
 425         __u8            src_type;
 426         bdaddr_t        init_addr;
 427         __u8            init_addr_type;
 428         bdaddr_t        resp_addr;
 429         __u8            resp_addr_type;
 430         __u16           handle;
 431         __u16           state;
 432         __u8            mode;
 433         __u8            type;
 434         __u8            role;
 435         bool            out;
 436         __u8            attempt;
 437         __u8            dev_class[3];
 438         __u8            features[HCI_MAX_PAGES][8];
 439         __u16           pkt_type;
 440         __u16           link_policy;
 441         __u8            key_type;
 442         __u8            auth_type;
 443         __u8            sec_level;
 444         __u8            pending_sec_level;
 445         __u8            pin_length;
 446         __u8            enc_key_size;
 447         __u8            io_capability;
 448         __u32           passkey_notify;
 449         __u8            passkey_entered;
 450         __u16           disc_timeout;
 451         __u16           conn_timeout;
 452         __u16           setting;
 453         __u16           le_conn_min_interval;
 454         __u16           le_conn_max_interval;
 455         __u16           le_conn_interval;
 456         __u16           le_conn_latency;
 457         __u16           le_supv_timeout;
 458         __u8            le_adv_data[HCI_MAX_AD_LENGTH];
 459         __u8            le_adv_data_len;
 460         __s8            rssi;
 461         __s8            tx_power;
 462         __s8            max_tx_power;
 463         unsigned long   flags;
 464
 465         __u32           clock;
 466         __u16           clock_accuracy;
 467
 468         unsigned long   conn_info_timestamp;
 469
 470         __u8            remote_cap;
 471         __u8            remote_auth;
 472         __u8            remote_id;
 473
 474         unsigned int    sent;
 475
 476         struct sk_buff_head data_q;
 477         struct list_head chan_list;
 478
 479         struct delayed_work disc_work;
 480         struct delayed_work auto_accept_work;
 481         struct delayed_work idle_work;
 482         struct delayed_work le_conn_timeout;
 483         struct work_struct  le_scan_cleanup;
 484
 485         struct device   dev;
 486         struct dentry   *debugfs;
 487
 488         struct hci_dev  *hdev;
 489         void            *l2cap_data;
 490         void            *sco_data;
 491         struct amp_mgr  *amp_mgr;
 492
 493         struct hci_conn *link;
 494
 495         void (*connect_cfm_cb)  (struct hci_conn *conn, u8 status);
 496         void (*security_cfm_cb) (struct hci_conn *conn, u8 status);
 497         void (*disconn_cfm_cb)  (struct hci_conn *conn, u8 reason);
 498 };
 499
 500 struct hci_chan {
 501         struct list_head list;
 502         __u16 handle;
 503         struct hci_conn *conn;
 504         struct sk_buff_head data_q;
 505         unsigned int    sent;
 506         __u8            state;
 507 };
 508
 509 struct hci_conn_params {
 510         struct list_head list;
 511         struct list_head action;
 512
 513         bdaddr_t addr;
 514         u8 addr_type;
 515
 516         u16 conn_min_interval;
 517         u16 conn_max_interval;
 518         u16 conn_latency;
 519         u16 supervision_timeout;
 520
 521         enum {
 522                 HCI_AUTO_CONN_DISABLED,
 523                 HCI_AUTO_CONN_REPORT,
 524                 HCI_AUTO_CONN_DIRECT,
 525                 HCI_AUTO_CONN_ALWAYS,
 526                 HCI_AUTO_CONN_LINK_LOSS,
 527                 HCI_AUTO_CONN_EXPLICIT,
 528         } auto_connect;
 529
 530         struct hci_conn *conn;
 531         bool explicit_connect;
 532 };
 533
 534 extern struct list_head hci_dev_list;
 535 extern struct list_head hci_cb_list;
 536 extern rwlock_t hci_dev_list_lock;
 537 extern struct mutex hci_cb_list_lock;
 538
 539 #define hci_dev_set_flag(hdev, nr)             set_bit((nr), (hdev)->dev_flags)
 540 #define hci_dev_clear_flag(hdev, nr)           clear_bit((nr), (hdev)->dev_flags)
 541 #define hci_dev_change_flag(hdev, nr)          change_bit((nr), (hdev)->dev_flags)
 542 #define hci_dev_test_flag(hdev, nr)            test_bit((nr), (hdev)->dev_flags)
 543 #define hci_dev_test_and_set_flag(hdev, nr)    test_and_set_bit((nr), (hdev)->dev_flags)
 544 #define hci_dev_test_and_clear_flag(hdev, nr)  test_and_clear_bit((nr), (hdev)->dev_flags)
 545 #define hci_dev_test_and_change_flag(hdev, nr) test_and_change_bit((nr), (hdev)->dev_flags)
 546
 547 #define hci_dev_clear_volatile_flags(hdev)                      \
 548         do {                                                    \
 549                 hci_dev_clear_flag(hdev, HCI_LE_SCAN);          \
 550                 hci_dev_clear_flag(hdev, HCI_LE_ADV);           \
 551                 hci_dev_clear_flag(hdev, HCI_PERIODIC_INQ);     \
 552         } while (0)
 553
 554 /* ----- HCI interface to upper protocols ----- */
 555 int l2cap_connect_ind(struct hci_dev *hdev, bdaddr_t *bdaddr);
 556 int l2cap_disconn_ind(struct hci_conn *hcon);
 557 void l2cap_recv_acldata(struct hci_conn *hcon, struct sk_buff *skb, u16 flags);
 558
 559 #if IS_ENABLED(CONFIG_BT_BREDR)
 560 int sco_connect_ind(struct hci_dev *hdev, bdaddr_t *bdaddr, __u8 *flags);
 561 void sco_recv_scodata(struct hci_conn *hcon, struct sk_buff *skb);
 562 #else
 563 static inline int sco_connect_ind(struct hci_dev *hdev, bdaddr_t *bdaddr,
 564                                   __u8 *flags)
 565 {
 566         return 0;
 567 }
 568
 569 static inline void sco_recv_scodata(struct hci_conn *hcon, struct sk_buff *skb)
 570 {
 571 }
 572 #endif
 573
 574 /* ----- Inquiry cache ----- */
 575 #define INQUIRY_CACHE_AGE_MAX   (HZ*30)   /* 30 seconds */
 576 #define INQUIRY_ENTRY_AGE_MAX   (HZ*60)   /* 60 seconds */
 577
 578 static inline void discovery_init(struct hci_dev *hdev)
 579 {
 580         hdev->discovery.state = DISCOVERY_STOPPED;
 581         INIT_LIST_HEAD(&hdev->discovery.all);
 582         INIT_LIST_HEAD(&hdev->discovery.unknown);
 583         INIT_LIST_HEAD(&hdev->discovery.resolve);
 584         hdev->discovery.report_invalid_rssi = true;
 585         hdev->discovery.rssi = HCI_RSSI_INVALID;
 586 }
 587
 588 static inline void hci_discovery_filter_clear(struct hci_dev *hdev)
 589 {
 590         hdev->discovery.result_filtering = false;
 591         hdev->discovery.report_invalid_rssi = true;
 592         hdev->discovery.rssi = HCI_RSSI_INVALID;
 593         hdev->discovery.uuid_count = 0;
 594         kfree(hdev->discovery.uuids);
 595         hdev->discovery.uuids = NULL;
 596         hdev->discovery.scan_start = 0;
 597         hdev->discovery.scan_duration = 0;
 598 }
 599
 600 bool hci_discovery_active(struct hci_dev *hdev);
 601
 602 void hci_discovery_set_state(struct hci_dev *hdev, int state);
 603
 604 static inline int inquiry_cache_empty(struct hci_dev *hdev)
 605 {
 606         return list_empty(&hdev->discovery.all);
 607 }
 608
 609 static inline long inquiry_cache_age(struct hci_dev *hdev)
 610 {
 611         struct discovery_state *c = &hdev->discovery;
 612         return jiffies - c->timestamp;
 613 }
 614
 615 static inline long inquiry_entry_age(struct inquiry_entry *e)
 616 {
 617         return jiffies - e->timestamp;
 618 }
 619
 620 struct inquiry_entry *hci_inquiry_cache_lookup(struct hci_dev *hdev,
 621                                                bdaddr_t *bdaddr);
 622 struct inquiry_entry *hci_inquiry_cache_lookup_unknown(struct hci_dev *hdev,
 623                                                        bdaddr_t *bdaddr);
 624 struct inquiry_entry *hci_inquiry_cache_lookup_resolve(struct hci_dev *hdev,
 625                                                        bdaddr_t *bdaddr,
 626                                                        int state);
 627 void hci_inquiry_cache_update_resolve(struct hci_dev *hdev,
 628                                       struct inquiry_entry *ie);
 629 u32 hci_inquiry_cache_update(struct hci_dev *hdev, struct inquiry_data *data,
 630                              bool name_known);
 631 void hci_inquiry_cache_flush(struct hci_dev *hdev);
 632
 633 /* ----- HCI Connections ----- */
 634 enum {
 635         HCI_CONN_AUTH_PEND,
 636         HCI_CONN_REAUTH_PEND,
 637         HCI_CONN_ENCRYPT_PEND,
 638         HCI_CONN_RSWITCH_PEND,
 639         HCI_CONN_MODE_CHANGE_PEND,
 640         HCI_CONN_SCO_SETUP_PEND,
 641         HCI_CONN_MGMT_CONNECTED,
 642         HCI_CONN_SSP_ENABLED,
 643         HCI_CONN_SC_ENABLED,
 644         HCI_CONN_AES_CCM,
 645         HCI_CONN_POWER_SAVE,
 646         HCI_CONN_FLUSH_KEY,
 647         HCI_CONN_ENCRYPT,
 648         HCI_CONN_AUTH,
 649         HCI_CONN_SECURE,
 650         HCI_CONN_FIPS,
 651         HCI_CONN_STK_ENCRYPT,
 652         HCI_CONN_AUTH_INITIATOR,
 653         HCI_CONN_DROP,
 654         HCI_CONN_PARAM_REMOVAL_PEND,
 655         HCI_CONN_NEW_LINK_KEY,
 656         HCI_CONN_SCANNING,
 657 };
 658
 659 static inline bool hci_conn_ssp_enabled(struct hci_conn *conn)
 660 {
 661         struct hci_dev *hdev = conn->hdev;
 662         return hci_dev_test_flag(hdev, HCI_SSP_ENABLED) &&
 663                test_bit(HCI_CONN_SSP_ENABLED, &conn->flags);
 664 }
 665
 666 static inline bool hci_conn_sc_enabled(struct hci_conn *conn)
 667 {
 668         struct hci_dev *hdev = conn->hdev;
 669         return hci_dev_test_flag(hdev, HCI_SC_ENABLED) &&
 670                test_bit(HCI_CONN_SC_ENABLED, &conn->flags);
 671 }
 672
 673 static inline void hci_conn_hash_add(struct hci_dev *hdev, struct hci_conn *c)
 674 {
 675         struct hci_conn_hash *h = &hdev->conn_hash;
 676         list_add_rcu(&c->list, &h->list);
 677         switch (c->type) {
 678         case ACL_LINK:
 679                 h->acl_num++;
 680                 break;
 681         case AMP_LINK:
 682                 h->amp_num++;
 683                 break;
 684         case LE_LINK:
 685                 h->le_num++;
 686                 if (c->role == HCI_ROLE_SLAVE)
 687                         h->le_num_slave++;
 688                 break;
 689         case SCO_LINK:
 690         case ESCO_LINK:
 691                 h->sco_num++;
 692                 break;
 693         }
 694 }
 695
 696 static inline void hci_conn_hash_del(struct hci_dev *hdev, struct hci_conn *c)
 697 {
 698         struct hci_conn_hash *h = &hdev->conn_hash;
 699
 700         list_del_rcu(&c->list);
 701         synchronize_rcu();
 702
 703         switch (c->type) {
 704         case ACL_LINK:
 705                 h->acl_num--;
 706                 break;
 707         case AMP_LINK:
 708                 h->amp_num--;
 709                 break;
 710         case LE_LINK:
 711                 h->le_num--;
 712                 if (c->role == HCI_ROLE_SLAVE)
 713                         h->le_num_slave--;
 714                 break;
 715         case SCO_LINK:
 716         case ESCO_LINK:
 717                 h->sco_num--;
 718                 break;
 719         }
 720 }
 721
 722 static inline unsigned int hci_conn_num(struct hci_dev *hdev, __u8 type)
 723 {
 724         struct hci_conn_hash *h = &hdev->conn_hash;
 725         switch (type) {
 726         case ACL_LINK:
 727                 return h->acl_num;
 728         case AMP_LINK:
 729                 return h->amp_num;
 730         case LE_LINK:
 731                 return h->le_num;
 732         case SCO_LINK:
 733         case ESCO_LINK:
 734                 return h->sco_num;
 735         default:
 736                 return 0;
 737         }
 738 }
 739
 740 static inline unsigned int hci_conn_count(struct hci_dev *hdev)
 741 {
 742         struct hci_conn_hash *c = &hdev->conn_hash;
 743
 744         return c->acl_num + c->amp_num + c->sco_num + c->le_num;
 745 }
 746
 747 static inline __u8 hci_conn_lookup_type(struct hci_dev *hdev, __u16 handle)
 748 {
 749         struct hci_conn_hash *h = &hdev->conn_hash;
 750         struct hci_conn *c;
 751         __u8 type = INVALID_LINK;
 752
 753         rcu_read_lock();
 754
 755         list_for_each_entry_rcu(c, &h->list, list) {
 756                 if (c->handle == handle) {
 757                         type = c->type;
 758                         break;
 759                 }
 760         }
 761
 762         rcu_read_unlock();
 763
 764         return type;
 765 }
 766
 767 static inline struct hci_conn *hci_conn_hash_lookup_handle(struct hci_dev *hdev,
 768                                                                 __u16 handle)
 769 {
 770         struct hci_conn_hash *h = &hdev->conn_hash;
 771         struct hci_conn  *c;
 772
 773         rcu_read_lock();
 774
 775         list_for_each_entry_rcu(c, &h->list, list) {
 776                 if (c->handle == handle) {
 777                         rcu_read_unlock();
 778                         return c;
 779                 }
 780         }
 781         rcu_read_unlock();
 782
 783         return NULL;
 784 }
 785
 786 static inline struct hci_conn *hci_conn_hash_lookup_ba(struct hci_dev *hdev,
 787                                                         __u8 type, bdaddr_t *ba)
 788 {
 789         struct hci_conn_hash *h = &hdev->conn_hash;
 790         struct hci_conn  *c;
 791
 792         rcu_read_lock();
 793
 794         list_for_each_entry_rcu(c, &h->list, list) {
 795                 if (c->type == type && !bacmp(&c->dst, ba)) {
 796                         rcu_read_unlock();
 797                         return c;
 798                 }
 799         }
 800
 801         rcu_read_unlock();
 802
 803         return NULL;
 804 }
 805
 806 static inline struct hci_conn *hci_conn_hash_lookup_le(struct hci_dev *hdev,
 807                                                        bdaddr_t *ba,
 808                                                        __u8 ba_type)
 809 {
 810         struct hci_conn_hash *h = &hdev->conn_hash;
 811         struct hci_conn  *c;
 812
 813         rcu_read_lock();
 814
 815         list_for_each_entry_rcu(c, &h->list, list) {
 816                 if (c->type != LE_LINK)
 817                        continue;
 818
 819                 if (ba_type == c->dst_type && !bacmp(&c->dst, ba)) {
 820                         rcu_read_unlock();
 821                         return c;
 822                 }
 823         }
 824
 825         rcu_read_unlock();
 826
 827         return NULL;
 828 }
 829
 830 static inline struct hci_conn *hci_conn_hash_lookup_state(struct hci_dev *hdev,
 831                                                         __u8 type, __u16 state)
 832 {
 833         struct hci_conn_hash *h = &hdev->conn_hash;
 834         struct hci_conn  *c;
 835
 836         rcu_read_lock();
 837
 838         list_for_each_entry_rcu(c, &h->list, list) {
 839                 if (c->type == type && c->state == state) {
 840                         rcu_read_unlock();
 841                         return c;
 842                 }
 843         }
 844
 845         rcu_read_unlock();
 846
 847         return NULL;
 848 }
 849
 850 static inline struct hci_conn *hci_lookup_le_connect(struct hci_dev *hdev)
 851 {
 852         struct hci_conn_hash *h = &hdev->conn_hash;
 853         struct hci_conn  *c;
 854
 855         rcu_read_lock();
 856
 857         list_for_each_entry_rcu(c, &h->list, list) {
 858                 if (c->type == LE_LINK && c->state == BT_CONNECT &&
 859                     !test_bit(HCI_CONN_SCANNING, &c->flags)) {
 860                         rcu_read_unlock();
 861                         return c;
 862                 }
 863         }
 864
 865         rcu_read_unlock();
 866
 867         return NULL;
 868 }
 869
 870 int hci_disconnect(struct hci_conn *conn, __u8 reason);
 871 bool hci_setup_sync(struct hci_conn *conn, __u16 handle);
 872 void hci_sco_setup(struct hci_conn *conn, __u8 status);
 873
 874 struct hci_conn *hci_conn_add(struct hci_dev *hdev, int type, bdaddr_t *dst,
 875                               u8 role);
 876 int hci_conn_del(struct hci_conn *conn);
 877 void hci_conn_hash_flush(struct hci_dev *hdev);
 878 void hci_conn_check_pending(struct hci_dev *hdev);
 879
 880 struct hci_chan *hci_chan_create(struct hci_conn *conn);
 881 void hci_chan_del(struct hci_chan *chan);
 882 void hci_chan_list_flush(struct hci_conn *conn);
 883 struct hci_chan *hci_chan_lookup_handle(struct hci_dev *hdev, __u16 handle);
 884
 885 struct hci_conn *hci_connect_le_scan(struct hci_dev *hdev, bdaddr_t *dst,
 886                                      u8 dst_type, u8 sec_level,
 887                                      u16 conn_timeout);
 888 struct hci_conn *hci_connect_le(struct hci_dev *hdev, bdaddr_t *dst,
 889                                 u8 dst_type, u8 sec_level, u16 conn_timeout,
 890                                 u8 role);
 891 struct hci_conn *hci_connect_acl(struct hci_dev *hdev, bdaddr_t *dst,
 892                                  u8 sec_level, u8 auth_type);
 893 struct hci_conn *hci_connect_sco(struct hci_dev *hdev, int type, bdaddr_t *dst,
 894                                  __u16 setting);
 895 int hci_conn_check_link_mode(struct hci_conn *conn);
 896 int hci_conn_check_secure(struct hci_conn *conn, __u8 sec_level);
 897 int hci_conn_security(struct hci_conn *conn, __u8 sec_level, __u8 auth_type,
 898                       bool initiator);
 899 int hci_conn_switch_role(struct hci_conn *conn, __u8 role);
 900
 901 void hci_conn_enter_active_mode(struct hci_conn *conn, __u8 force_active);
 902
 903 void hci_le_conn_failed(struct hci_conn *conn, u8 status);
 904
 905 /*
 906  * hci_conn_get() and hci_conn_put() are used to control the life-time of an
 907  * "hci_conn" object. They do not guarantee that the hci_conn object is running,
 908  * working or anything else. They just guarantee that the object is available
 909  * and can be dereferenced. So you can use its locks, local variables and any
 910  * other constant data.
 911  * Before accessing runtime data, you _must_ lock the object and then check that
 912  * it is still running. As soon as you release the locks, the connection might
 913  * get dropped, though.
 914  *
 915  * On the other hand, hci_conn_hold() and hci_conn_drop() are used to control
 916  * how long the underlying connection is held. So every channel that runs on the
 917  * hci_conn object calls this to prevent the connection from disappearing. As
 918  * long as you hold a device, you must also guarantee that you have a valid
 919  * reference to the device via hci_conn_get() (or the initial reference from
 920  * hci_conn_add()).
 921  * The hold()/drop() ref-count is known to drop below 0 sometimes, which doesn't
 922  * break because nobody cares for that. But this means, we cannot use
 923  * _get()/_drop() in it, but require the caller to have a valid ref (FIXME).
 924  */
 925
 926 static inline struct hci_conn *hci_conn_get(struct hci_conn *conn)
 927 {
 928         get_device(&conn->dev);
 929         return conn;
 930 }
 931
 932 static inline void hci_conn_put(struct hci_conn *conn)
 933 {
 934         put_device(&conn->dev);
 935 }
 936
 937 static inline void hci_conn_hold(struct hci_conn *conn)
 938 {
 939         BT_DBG("hcon %p orig refcnt %d", conn, atomic_read(&conn->refcnt));
 940
 941         atomic_inc(&conn->refcnt);
 942         cancel_delayed_work(&conn->disc_work);
 943 }
 944
 945 static inline void hci_conn_drop(struct hci_conn *conn)
 946 {
 947         BT_DBG("hcon %p orig refcnt %d", conn, atomic_read(&conn->refcnt));
 948
 949         if (atomic_dec_and_test(&conn->refcnt)) {
 950                 unsigned long timeo;
 951
 952                 switch (conn->type) {
 953                 case ACL_LINK:
 954                 case LE_LINK:
 955                         cancel_delayed_work(&conn->idle_work);
 956                         if (conn->state == BT_CONNECTED) {
 957                                 timeo = conn->disc_timeout;
 958                                 if (!conn->out)
 959                                         timeo *= 2;
 960                         } else {
 961                                 timeo = 0;
 962                         }
 963                         break;
 964
 965                 case AMP_LINK:
 966                         timeo = conn->disc_timeout;
 967                         break;
 968
 969                 default:
 970                         timeo = 0;
 971                         break;
 972                 }
 973
 974                 cancel_delayed_work(&conn->disc_work);
 975                 queue_delayed_work(conn->hdev->workqueue,
 976                                    &conn->disc_work, timeo);
 977         }
 978 }
 979
 980 /* ----- HCI Devices ----- */
 981 static inline void hci_dev_put(struct hci_dev *d)
 982 {
 983         BT_DBG("%s orig refcnt %d", d->name,
 984                atomic_read(&d->dev.kobj.kref.refcount));
 985
 986         put_device(&d->dev);
 987 }
 988
 989 static inline struct hci_dev *hci_dev_hold(struct hci_dev *d)
 990 {
 991         BT_DBG("%s orig refcnt %d", d->name,
 992                atomic_read(&d->dev.kobj.kref.refcount));
 993
 994         get_device(&d->dev);
 995         return d;
 996 }
 997
 998 #define hci_dev_lock(d)         mutex_lock(&d->lock)
 999 #define hci_dev_unlock(d)       mutex_unlock(&d->lock)
1000
1001 #define to_hci_dev(d) container_of(d, struct hci_dev, dev)
1002 #define to_hci_conn(c) container_of(c, struct hci_conn, dev)
1003
1004 static inline void *hci_get_drvdata(struct hci_dev *hdev)
1005 {
1006         return dev_get_drvdata(&hdev->dev);
1007 }
1008
1009 static inline void hci_set_drvdata(struct hci_dev *hdev, void *data)
1010 {
1011         dev_set_drvdata(&hdev->dev, data);
1012 }
1013
1014 struct hci_dev *hci_dev_get(int index);
1015 struct hci_dev *hci_get_route(bdaddr_t *dst, bdaddr_t *src);
1016
1017 struct hci_dev *hci_alloc_dev(void);
1018 void hci_free_dev(struct hci_dev *hdev);
1019 int hci_register_dev(struct hci_dev *hdev);
1020 void hci_unregister_dev(struct hci_dev *hdev);
1021 int hci_suspend_dev(struct hci_dev *hdev);
1022 int hci_resume_dev(struct hci_dev *hdev);
1023 int hci_reset_dev(struct hci_dev *hdev);
1024 int hci_dev_open(__u16 dev);
1025 int hci_dev_close(__u16 dev);
1026 int hci_dev_do_close(struct hci_dev *hdev);
1027 int hci_dev_reset(__u16 dev);
1028 int hci_dev_reset_stat(__u16 dev);
1029 int hci_dev_cmd(unsigned int cmd, void __user *arg);
1030 int hci_get_dev_list(void __user *arg);
1031 int hci_get_dev_info(void __user *arg);
1032 int hci_get_conn_list(void __user *arg);
1033 int hci_get_conn_info(struct hci_dev *hdev, void __user *arg);
1034 int hci_get_auth_info(struct hci_dev *hdev, void __user *arg);
1035 int hci_inquiry(void __user *arg);
1036
1037 struct bdaddr_list *hci_bdaddr_list_lookup(struct list_head *list,
1038                                            bdaddr_t *bdaddr, u8 type);
1039 int hci_bdaddr_list_add(struct list_head *list, bdaddr_t *bdaddr, u8 type);
1040 int hci_bdaddr_list_del(struct list_head *list, bdaddr_t *bdaddr, u8 type);
1041 void hci_bdaddr_list_clear(struct list_head *list);
1042
1043 struct hci_conn_params *hci_conn_params_lookup(struct hci_dev *hdev,
1044                                                bdaddr_t *addr, u8 addr_type);
1045 struct hci_conn_params *hci_conn_params_add(struct hci_dev *hdev,
1046                                             bdaddr_t *addr, u8 addr_type);
1047 void hci_conn_params_del(struct hci_dev *hdev, bdaddr_t *addr, u8 addr_type);
1048 void hci_conn_params_clear_disabled(struct hci_dev *hdev);
1049
1050 struct hci_conn_params *hci_pend_le_action_lookup(struct list_head *list,
1051                                                   bdaddr_t *addr,
1052                                                   u8 addr_type);
1053
1054 void hci_uuids_clear(struct hci_dev *hdev);
1055
1056 void hci_link_keys_clear(struct hci_dev *hdev);
1057 struct link_key *hci_find_link_key(struct hci_dev *hdev, bdaddr_t *bdaddr);
1058 struct link_key *hci_add_link_key(struct hci_dev *hdev, struct hci_conn *conn,
1059                                   bdaddr_t *bdaddr, u8 *val, u8 type,
1060                                   u8 pin_len, bool *persistent);
1061 struct smp_ltk *hci_add_ltk(struct hci_dev *hdev, bdaddr_t *bdaddr,
1062                             u8 addr_type, u8 type, u8 authenticated,
1063                             u8 tk[16], u8 enc_size, __le16 ediv, __le64 rand);
1064 struct smp_ltk *hci_find_ltk(struct hci_dev *hdev, bdaddr_t *bdaddr,
1065                              u8 addr_type, u8 role);
1066 int hci_remove_ltk(struct hci_dev *hdev, bdaddr_t *bdaddr, u8 bdaddr_type);
1067 void hci_smp_ltks_clear(struct hci_dev *hdev);
1068 int hci_remove_link_key(struct hci_dev *hdev, bdaddr_t *bdaddr);
1069
1070 struct smp_irk *hci_find_irk_by_rpa(struct hci_dev *hdev, bdaddr_t *rpa);
1071 struct smp_irk *hci_find_irk_by_addr(struct hci_dev *hdev, bdaddr_t *bdaddr,
1072                                      u8 addr_type);
1073 struct smp_irk *hci_add_irk(struct hci_dev *hdev, bdaddr_t *bdaddr,
1074                             u8 addr_type, u8 val[16], bdaddr_t *rpa);
1075 void hci_remove_irk(struct hci_dev *hdev, bdaddr_t *bdaddr, u8 addr_type);
1076 void hci_smp_irks_clear(struct hci_dev *hdev);
1077
1078 bool hci_bdaddr_is_paired(struct hci_dev *hdev, bdaddr_t *bdaddr, u8 type);
1079
1080 void hci_remote_oob_data_clear(struct hci_dev *hdev);
1081 struct oob_data *hci_find_remote_oob_data(struct hci_dev *hdev,
1082                                           bdaddr_t *bdaddr, u8 bdaddr_type);
1083 int hci_add_remote_oob_data(struct hci_dev *hdev, bdaddr_t *bdaddr,
1084                             u8 bdaddr_type, u8 *hash192, u8 *rand192,
1085                             u8 *hash256, u8 *rand256);
1086 int hci_remove_remote_oob_data(struct hci_dev *hdev, bdaddr_t *bdaddr,
1087                                u8 bdaddr_type);
1088
1089 void hci_adv_instances_clear(struct hci_dev *hdev);
1090 struct adv_info *hci_find_adv_instance(struct hci_dev *hdev, u8 instance);
1091 struct adv_info *hci_get_next_instance(struct hci_dev *hdev, u8 instance);
1092 int hci_add_adv_instance(struct hci_dev *hdev, u8 instance, u32 flags,
1093                          u16 adv_data_len, u8 *adv_data,
1094                          u16 scan_rsp_len, u8 *scan_rsp_data,
1095                          u16 timeout, u16 duration);
1096 int hci_remove_adv_instance(struct hci_dev *hdev, u8 instance);
1097
1098 void hci_event_packet(struct hci_dev *hdev, struct sk_buff *skb);
1099
1100 int hci_recv_frame(struct hci_dev *hdev, struct sk_buff *skb);
1101 int hci_recv_diag(struct hci_dev *hdev, struct sk_buff *skb);
1102
1103 void hci_init_sysfs(struct hci_dev *hdev);
1104 void hci_conn_init_sysfs(struct hci_conn *conn);
1105 void hci_conn_add_sysfs(struct hci_conn *conn);
1106 void hci_conn_del_sysfs(struct hci_conn *conn);
1107
1108 #define SET_HCIDEV_DEV(hdev, pdev) ((hdev)->dev.parent = (pdev))
1109
1110 /* ----- LMP capabilities ----- */
1111 #define lmp_encrypt_capable(dev)   ((dev)->features[0][0] & LMP_ENCRYPT)
1112 #define lmp_rswitch_capable(dev)   ((dev)->features[0][0] & LMP_RSWITCH)
1113 #define lmp_hold_capable(dev)      ((dev)->features[0][0] & LMP_HOLD)
1114 #define lmp_sniff_capable(dev)     ((dev)->features[0][0] & LMP_SNIFF)
1115 #define lmp_park_capable(dev)      ((dev)->features[0][1] & LMP_PARK)
1116 #define lmp_inq_rssi_capable(dev)  ((dev)->features[0][3] & LMP_RSSI_INQ)
1117 #define lmp_esco_capable(dev)      ((dev)->features[0][3] & LMP_ESCO)
1118 #define lmp_bredr_capable(dev)     (!((dev)->features[0][4] & LMP_NO_BREDR))
1119 #define lmp_le_capable(dev)        ((dev)->features[0][4] & LMP_LE)
1120 #define lmp_sniffsubr_capable(dev) ((dev)->features[0][5] & LMP_SNIFF_SUBR)
1121 #define lmp_pause_enc_capable(dev) ((dev)->features[0][5] & LMP_PAUSE_ENC)
1122 #define lmp_ext_inq_capable(dev)   ((dev)->features[0][6] & LMP_EXT_INQ)
1123 #define lmp_le_br_capable(dev)     (!!((dev)->features[0][6] & LMP_SIMUL_LE_BR))
1124 #define lmp_ssp_capable(dev)       ((dev)->features[0][6] & LMP_SIMPLE_PAIR)
1125 #define lmp_no_flush_capable(dev)  ((dev)->features[0][6] & LMP_NO_FLUSH)
1126 #define lmp_lsto_capable(dev)      ((dev)->features[0][7] & LMP_LSTO)
1127 #define lmp_inq_tx_pwr_capable(dev) ((dev)->features[0][7] & LMP_INQ_TX_PWR)
1128 #define lmp_ext_feat_capable(dev)  ((dev)->features[0][7] & LMP_EXTFEATURES)
1129 #define lmp_transp_capable(dev)    ((dev)->features[0][2] & LMP_TRANSPARENT)
1130
1131 /* ----- Extended LMP capabilities ----- */
1132 #define lmp_csb_master_capable(dev) ((dev)->features[2][0] & LMP_CSB_MASTER)
1133 #define lmp_csb_slave_capable(dev)  ((dev)->features[2][0] & LMP_CSB_SLAVE)
1134 #define lmp_sync_train_capable(dev) ((dev)->features[2][0] & LMP_SYNC_TRAIN)
1135 #define lmp_sync_scan_capable(dev)  ((dev)->features[2][0] & LMP_SYNC_SCAN)
1136 #define lmp_sc_capable(dev)         ((dev)->features[2][1] & LMP_SC)
1137 #define lmp_ping_capable(dev)       ((dev)->features[2][1] & LMP_PING)
1138
1139 /* ----- Host capabilities ----- */
1140 #define lmp_host_ssp_capable(dev)  ((dev)->features[1][0] & LMP_HOST_SSP)
1141 #define lmp_host_sc_capable(dev)   ((dev)->features[1][0] & LMP_HOST_SC)
1142 #define lmp_host_le_capable(dev)   (!!((dev)->features[1][0] & LMP_HOST_LE))
1143 #define lmp_host_le_br_capable(dev) (!!((dev)->features[1][0] & LMP_HOST_LE_BREDR))
1144
1145 #define hdev_is_powered(dev)   (test_bit(HCI_UP, &(dev)->flags) && \
1146                                 !hci_dev_test_flag(dev, HCI_AUTO_OFF))
1147 #define bredr_sc_enabled(dev)  (lmp_sc_capable(dev) && \
1148                                 hci_dev_test_flag(dev, HCI_SC_ENABLED))
1149
1150 /* ----- HCI protocols ----- */
1151 #define HCI_PROTO_DEFER             0x01
1152
1153 static inline int hci_proto_connect_ind(struct hci_dev *hdev, bdaddr_t *bdaddr,
1154                                         __u8 type, __u8 *flags)
1155 {
1156         switch (type) {
1157         case ACL_LINK:
1158                 return l2cap_connect_ind(hdev, bdaddr);
1159
1160         case SCO_LINK:
1161         case ESCO_LINK:
1162                 return sco_connect_ind(hdev, bdaddr, flags);
1163
1164         default:
1165                 BT_ERR("unknown link type %d", type);
1166                 return -EINVAL;
1167         }
1168 }
1169
1170 static inline int hci_proto_disconn_ind(struct hci_conn *conn)
1171 {
1172         if (conn->type != ACL_LINK && conn->type != LE_LINK)
1173                 return HCI_ERROR_REMOTE_USER_TERM;
1174
1175         return l2cap_disconn_ind(conn);
1176 }
1177
1178 /* ----- HCI callbacks ----- */
1179 struct hci_cb {
1180         struct list_head list;
1181
1182         char *name;
1183
1184         void (*connect_cfm)     (struct hci_conn *conn, __u8 status);
1185         void (*disconn_cfm)     (struct hci_conn *conn, __u8 status);
1186         void (*security_cfm)    (struct hci_conn *conn, __u8 status,
1187                                                                 __u8 encrypt);
1188         void (*key_change_cfm)  (struct hci_conn *conn, __u8 status);
1189         void (*role_switch_cfm) (struct hci_conn *conn, __u8 status, __u8 role);
1190 };
1191
1192 static inline void hci_connect_cfm(struct hci_conn *conn, __u8 status)
1193 {
1194         struct hci_cb *cb;
1195
1196         mutex_lock(&hci_cb_list_lock);
1197         list_for_each_entry(cb, &hci_cb_list, list) {
1198                 if (cb->connect_cfm)
1199                         cb->connect_cfm(conn, status);
1200         }
1201         mutex_unlock(&hci_cb_list_lock);
1202
1203         if (conn->connect_cfm_cb)
1204                 conn->connect_cfm_cb(conn, status);
1205 }
1206
1207 static inline void hci_disconn_cfm(struct hci_conn *conn, __u8 reason)
1208 {
1209         struct hci_cb *cb;
1210
1211         mutex_lock(&hci_cb_list_lock);
1212         list_for_each_entry(cb, &hci_cb_list, list) {
1213                 if (cb->disconn_cfm)
1214                         cb->disconn_cfm(conn, reason);
1215         }
1216         mutex_unlock(&hci_cb_list_lock);
1217
1218         if (conn->disconn_cfm_cb)
1219                 conn->disconn_cfm_cb(conn, reason);
1220 }
1221
1222 static inline void hci_auth_cfm(struct hci_conn *conn, __u8 status)
1223 {
1224         struct hci_cb *cb;
1225         __u8 encrypt;
1226
1227         if (test_bit(HCI_CONN_ENCRYPT_PEND, &conn->flags))
1228                 return;
1229
1230         encrypt = test_bit(HCI_CONN_ENCRYPT, &conn->flags) ? 0x01 : 0x00;
1231
1232         mutex_lock(&hci_cb_list_lock);
1233         list_for_each_entry(cb, &hci_cb_list, list) {
1234                 if (cb->security_cfm)
1235                         cb->security_cfm(conn, status, encrypt);
1236         }
1237         mutex_unlock(&hci_cb_list_lock);
1238
1239         if (conn->security_cfm_cb)
1240                 conn->security_cfm_cb(conn, status);
1241 }
1242
1243 static inline void hci_encrypt_cfm(struct hci_conn *conn, __u8 status,
1244                                                                 __u8 encrypt)
1245 {
1246         struct hci_cb *cb;
1247
1248         if (conn->sec_level == BT_SECURITY_SDP)
1249                 conn->sec_level = BT_SECURITY_LOW;
1250
1251         if (conn->pending_sec_level > conn->sec_level)
1252                 conn->sec_level = conn->pending_sec_level;
1253
1254         mutex_lock(&hci_cb_list_lock);
1255         list_for_each_entry(cb, &hci_cb_list, list) {
1256                 if (cb->security_cfm)
1257                         cb->security_cfm(conn, status, encrypt);
1258         }
1259         mutex_unlock(&hci_cb_list_lock);
1260
1261         if (conn->security_cfm_cb)
1262                 conn->security_cfm_cb(conn, status);
1263 }
1264
1265 static inline void hci_key_change_cfm(struct hci_conn *conn, __u8 status)
1266 {
1267         struct hci_cb *cb;
1268
1269         mutex_lock(&hci_cb_list_lock);
1270         list_for_each_entry(cb, &hci_cb_list, list) {
1271                 if (cb->key_change_cfm)
1272                         cb->key_change_cfm(conn, status);
1273         }
1274         mutex_unlock(&hci_cb_list_lock);
1275 }
1276
1277 static inline void hci_role_switch_cfm(struct hci_conn *conn, __u8 status,
1278                                                                 __u8 role)
1279 {
1280         struct hci_cb *cb;
1281
1282         mutex_lock(&hci_cb_list_lock);
1283         list_for_each_entry(cb, &hci_cb_list, list) {
1284                 if (cb->role_switch_cfm)
1285                         cb->role_switch_cfm(conn, status, role);
1286         }
1287         mutex_unlock(&hci_cb_list_lock);
1288 }
1289
1290 static inline void *eir_get_data(u8 *eir, size_t eir_len, u8 type,
1291                                  size_t *data_len)
1292 {
1293         size_t parsed = 0;
1294
1295         if (eir_len < 2)
1296                 return NULL;
1297
1298         while (parsed < eir_len - 1) {
1299                 u8 field_len = eir[0];
1300
1301                 if (field_len == 0)
1302                         break;
1303
1304                 parsed += field_len + 1;
1305
1306                 if (parsed > eir_len)
1307                         break;
1308
1309                 if (eir[1] != type) {
1310                         eir += field_len + 1;
1311                         continue;
1312                 }
1313
1314                 /* Zero length data */
1315                 if (field_len == 1)
1316                         return NULL;
1317
1318                 if (data_len)
1319                         *data_len = field_len - 1;
1320
1321                 return &eir[2];
1322         }
1323
1324         return NULL;
1325 }
1326
1327 static inline bool hci_bdaddr_is_rpa(bdaddr_t *bdaddr, u8 addr_type)
1328 {
1329         if (addr_type != ADDR_LE_DEV_RANDOM)
1330                 return false;
1331
1332         if ((bdaddr->b[5] & 0xc0) == 0x40)
1333                return true;
1334
1335         return false;
1336 }
1337
1338 static inline bool hci_is_identity_address(bdaddr_t *addr, u8 addr_type)
1339 {
1340         if (addr_type == ADDR_LE_DEV_PUBLIC)
1341                 return true;
1342
1343         /* Check for Random Static address type */
1344         if ((addr->b[5] & 0xc0) == 0xc0)
1345                 return true;
1346
1347         return false;
1348 }
1349
1350 static inline struct smp_irk *hci_get_irk(struct hci_dev *hdev,
1351                                           bdaddr_t *bdaddr, u8 addr_type)
1352 {
1353         if (!hci_bdaddr_is_rpa(bdaddr, addr_type))
1354                 return NULL;
1355
1356         return hci_find_irk_by_rpa(hdev, bdaddr);
1357 }
1358
1359 static inline int hci_check_conn_params(u16 min, u16 max, u16 latency,
1360                                         u16 to_multiplier)
1361 {
1362         u16 max_latency;
1363
1364         if (min > max || min < 6 || max > 3200)
1365                 return -EINVAL;
1366
1367         if (to_multiplier < 10 || to_multiplier > 3200)
1368                 return -EINVAL;
1369
1370         if (max >= to_multiplier * 8)
1371                 return -EINVAL;
1372
1373         max_latency = (to_multiplier * 4 / max) - 1;
1374         if (latency > 499 || latency > max_latency)
1375                 return -EINVAL;
1376
1377         return 0;
1378 }
1379
1380 int hci_register_cb(struct hci_cb *hcb);
1381 int hci_unregister_cb(struct hci_cb *hcb);
1382
1383 struct sk_buff *__hci_cmd_sync(struct hci_dev *hdev, u16 opcode, u32 plen,
1384                                const void *param, u32 timeout);
1385 struct sk_buff *__hci_cmd_sync_ev(struct hci_dev *hdev, u16 opcode, u32 plen,
1386                                   const void *param, u8 event, u32 timeout);
1387
1388 int hci_send_cmd(struct hci_dev *hdev, __u16 opcode, __u32 plen,
1389                  const void *param);
1390 void hci_send_acl(struct hci_chan *chan, struct sk_buff *skb, __u16 flags);
1391 void hci_send_sco(struct hci_conn *conn, struct sk_buff *skb);
1392
1393 void *hci_sent_cmd_data(struct hci_dev *hdev, __u16 opcode);
1394
1395 struct sk_buff *hci_cmd_sync(struct hci_dev *hdev, u16 opcode, u32 plen,
1396                              const void *param, u32 timeout);
1397
1398 /* ----- HCI Sockets ----- */
1399 void hci_send_to_sock(struct hci_dev *hdev, struct sk_buff *skb);
1400 void hci_send_to_channel(unsigned short channel, struct sk_buff *skb,
1401                          int flag, struct sock *skip_sk);
1402 void hci_send_to_monitor(struct hci_dev *hdev, struct sk_buff *skb);
1403
1404 void hci_sock_dev_event(struct hci_dev *hdev, int event);
1405
1406 #define HCI_MGMT_VAR_LEN        BIT(0)
1407 #define HCI_MGMT_NO_HDEV        BIT(1)
1408 #define HCI_MGMT_UNTRUSTED      BIT(2)
1409 #define HCI_MGMT_UNCONFIGURED   BIT(3)
1410
1411 struct hci_mgmt_handler {
1412         int (*func) (struct sock *sk, struct hci_dev *hdev, void *data,
1413                      u16 data_len);
1414         size_t data_len;
1415         unsigned long flags;
1416 };
1417
1418 struct hci_mgmt_chan {
1419         struct list_head list;
1420         unsigned short channel;
1421         size_t handler_count;
1422         const struct hci_mgmt_handler *handlers;
1423         void (*hdev_init) (struct sock *sk, struct hci_dev *hdev);
1424 };
1425
1426 int hci_mgmt_chan_register(struct hci_mgmt_chan *c);
1427 void hci_mgmt_chan_unregister(struct hci_mgmt_chan *c);
1428
1429 /* Management interface */
1430 #define DISCOV_TYPE_BREDR               (BIT(BDADDR_BREDR))
1431 #define DISCOV_TYPE_LE                  (BIT(BDADDR_LE_PUBLIC) | \
1432                                          BIT(BDADDR_LE_RANDOM))
1433 #define DISCOV_TYPE_INTERLEAVED         (BIT(BDADDR_BREDR) | \
1434                                          BIT(BDADDR_LE_PUBLIC) | \
1435                                          BIT(BDADDR_LE_RANDOM))
1436
1437 /* These LE scan and inquiry parameters were chosen according to LE General
1438  * Discovery Procedure specification.
1439  */
1440 #define DISCOV_LE_SCAN_WIN              0x12
1441 #define DISCOV_LE_SCAN_INT              0x12
1442 #define DISCOV_LE_TIMEOUT               10240   /* msec */
1443 #define DISCOV_INTERLEAVED_TIMEOUT      5120    /* msec */
1444 #define DISCOV_INTERLEAVED_INQUIRY_LEN  0x04
1445 #define DISCOV_BREDR_INQUIRY_LEN        0x08
1446 #define DISCOV_LE_RESTART_DELAY         msecs_to_jiffies(200)   /* msec */
1447
1448 int mgmt_new_settings(struct hci_dev *hdev);
1449 void mgmt_index_added(struct hci_dev *hdev);
1450 void mgmt_index_removed(struct hci_dev *hdev);
1451 void mgmt_set_powered_failed(struct hci_dev *hdev, int err);
1452 void mgmt_power_on(struct hci_dev *hdev, int err);
1453 void __mgmt_power_off(struct hci_dev *hdev);
1454 void mgmt_new_link_key(struct hci_dev *hdev, struct link_key *key,
1455                        bool persistent);
1456 void mgmt_device_connected(struct hci_dev *hdev, struct hci_conn *conn,
1457                            u32 flags, u8 *name, u8 name_len);
1458 void mgmt_device_disconnected(struct hci_dev *hdev, bdaddr_t *bdaddr,
1459                               u8 link_type, u8 addr_type, u8 reason,
1460                               bool mgmt_connected);
1461 void mgmt_disconnect_failed(struct hci_dev *hdev, bdaddr_t *bdaddr,
1462                             u8 link_type, u8 addr_type, u8 status);
1463 void mgmt_connect_failed(struct hci_dev *hdev, bdaddr_t *bdaddr, u8 link_type,
1464                          u8 addr_type, u8 status);
1465 void mgmt_pin_code_request(struct hci_dev *hdev, bdaddr_t *bdaddr, u8 secure);
1466 void mgmt_pin_code_reply_complete(struct hci_dev *hdev, bdaddr_t *bdaddr,
1467                                   u8 status);
1468 void mgmt_pin_code_neg_reply_complete(struct hci_dev *hdev, bdaddr_t *bdaddr,
1469                                       u8 status);
1470 int mgmt_user_confirm_request(struct hci_dev *hdev, bdaddr_t *bdaddr,
1471                               u8 link_type, u8 addr_type, u32 value,
1472                               u8 confirm_hint);
1473 int mgmt_user_confirm_reply_complete(struct hci_dev *hdev, bdaddr_t *bdaddr,
1474                                      u8 link_type, u8 addr_type, u8 status);
1475 int mgmt_user_confirm_neg_reply_complete(struct hci_dev *hdev, bdaddr_t *bdaddr,
1476                                          u8 link_type, u8 addr_type, u8 status);
1477 int mgmt_user_passkey_request(struct hci_dev *hdev, bdaddr_t *bdaddr,
1478                               u8 link_type, u8 addr_type);
1479 int mgmt_user_passkey_reply_complete(struct hci_dev *hdev, bdaddr_t *bdaddr,
1480                                      u8 link_type, u8 addr_type, u8 status);
1481 int mgmt_user_passkey_neg_reply_complete(struct hci_dev *hdev, bdaddr_t *bdaddr,
1482                                          u8 link_type, u8 addr_type, u8 status);
1483 int mgmt_user_passkey_notify(struct hci_dev *hdev, bdaddr_t *bdaddr,
1484                              u8 link_type, u8 addr_type, u32 passkey,
1485                              u8 entered);
1486 void mgmt_auth_failed(struct hci_conn *conn, u8 status);
1487 void mgmt_auth_enable_complete(struct hci_dev *hdev, u8 status);
1488 void mgmt_ssp_enable_complete(struct hci_dev *hdev, u8 enable, u8 status);
1489 void mgmt_set_class_of_dev_complete(struct hci_dev *hdev, u8 *dev_class,
1490                                     u8 status);
1491 void mgmt_set_local_name_complete(struct hci_dev *hdev, u8 *name, u8 status);
1492 void mgmt_start_discovery_complete(struct hci_dev *hdev, u8 status);
1493 void mgmt_stop_discovery_complete(struct hci_dev *hdev, u8 status);
1494 void mgmt_device_found(struct hci_dev *hdev, bdaddr_t *bdaddr, u8 link_type,
1495                        u8 addr_type, u8 *dev_class, s8 rssi, u32 flags,
1496                        u8 *eir, u16 eir_len, u8 *scan_rsp, u8 scan_rsp_len);
1497 void mgmt_remote_name(struct hci_dev *hdev, bdaddr_t *bdaddr, u8 link_type,
1498                       u8 addr_type, s8 rssi, u8 *name, u8 name_len);
1499 void mgmt_discovering(struct hci_dev *hdev, u8 discovering);
1500 bool mgmt_powering_down(struct hci_dev *hdev);
1501 void mgmt_new_ltk(struct hci_dev *hdev, struct smp_ltk *key, bool persistent);
1502 void mgmt_new_irk(struct hci_dev *hdev, struct smp_irk *irk, bool persistent);
1503 void mgmt_new_csrk(struct hci_dev *hdev, struct smp_csrk *csrk,
1504                    bool persistent);
1505 void mgmt_new_conn_param(struct hci_dev *hdev, bdaddr_t *bdaddr,
1506                          u8 bdaddr_type, u8 store_hint, u16 min_interval,
1507                          u16 max_interval, u16 latency, u16 timeout);
1508 void mgmt_smp_complete(struct hci_conn *conn, bool complete);
1509 bool mgmt_get_connectable(struct hci_dev *hdev);
1510 void mgmt_set_connectable_complete(struct hci_dev *hdev, u8 status);
1511 void mgmt_set_discoverable_complete(struct hci_dev *hdev, u8 status);
1512 u8 mgmt_get_adv_discov_flags(struct hci_dev *hdev);
1513 void mgmt_advertising_added(struct sock *sk, struct hci_dev *hdev,
1514                             u8 instance);
1515 void mgmt_advertising_removed(struct sock *sk, struct hci_dev *hdev,
1516                               u8 instance);
1517
1518 u8 hci_le_conn_update(struct hci_conn *conn, u16 min, u16 max, u16 latency,
1519                       u16 to_multiplier);
1520 void hci_le_start_enc(struct hci_conn *conn, __le16 ediv, __le64 rand,
1521                       __u8 ltk[16], __u8 key_size);
1522
1523 void hci_copy_identity_address(struct hci_dev *hdev, bdaddr_t *bdaddr,
1524                                u8 *bdaddr_type);
1525
1526 #define SCO_AIRMODE_MASK       0x0003
1527 #define SCO_AIRMODE_CVSD       0x0000
1528 #define SCO_AIRMODE_TRANSP     0x0003
1529
1530 #endif /* __HCI_CORE_H */