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         const char              *hw_info;
 376         const char              *fw_info;
 377         struct dentry           *debugfs;
 378
 379         struct device           dev;
 380
 381         struct rfkill           *rfkill;
 382
 383         DECLARE_BITMAP(dev_flags, __HCI_NUM_FLAGS);
 384
 385         __s8                    adv_tx_power;
 386         __u8                    adv_data[HCI_MAX_AD_LENGTH];
 387         __u8                    adv_data_len;
 388         __u8                    scan_rsp_data[HCI_MAX_AD_LENGTH];
 389         __u8                    scan_rsp_data_len;
 390
 391         struct list_head        adv_instances;
 392         unsigned int            adv_instance_cnt;
 393         __u8                    cur_adv_instance;
 394         __u16                   adv_instance_timeout;
 395         struct delayed_work     adv_instance_expire;
 396
 397         __u8                    irk[16];
 398         __u32                   rpa_timeout;
 399         struct delayed_work     rpa_expired;
 400         bdaddr_t                rpa;
 401
 402         struct led_trigger      *power_led;
 403
 404         int (*open)(struct hci_dev *hdev);
 405         int (*close)(struct hci_dev *hdev);
 406         int (*flush)(struct hci_dev *hdev);
 407         int (*setup)(struct hci_dev *hdev);
 408         int (*shutdown)(struct hci_dev *hdev);
 409         int (*send)(struct hci_dev *hdev, struct sk_buff *skb);
 410         void (*notify)(struct hci_dev *hdev, unsigned int evt);
 411         void (*hw_error)(struct hci_dev *hdev, u8 code);
 412         int (*post_init)(struct hci_dev *hdev);
 413         int (*set_diag)(struct hci_dev *hdev, bool enable);
 414         int (*set_bdaddr)(struct hci_dev *hdev, const bdaddr_t *bdaddr);
 415 };
 416
 417 #define HCI_PHY_HANDLE(handle)  (handle & 0xff)
 418
 419 struct hci_conn {
 420         struct list_head list;
 421
 422         atomic_t        refcnt;
 423
 424         bdaddr_t        dst;
 425         __u8            dst_type;
 426         bdaddr_t        src;
 427         __u8            src_type;
 428         bdaddr_t        init_addr;
 429         __u8            init_addr_type;
 430         bdaddr_t        resp_addr;
 431         __u8            resp_addr_type;
 432         __u16           handle;
 433         __u16           state;
 434         __u8            mode;
 435         __u8            type;
 436         __u8            role;
 437         bool            out;
 438         __u8            attempt;
 439         __u8            dev_class[3];
 440         __u8            features[HCI_MAX_PAGES][8];
 441         __u16           pkt_type;
 442         __u16           link_policy;
 443         __u8            key_type;
 444         __u8            auth_type;
 445         __u8            sec_level;
 446         __u8            pending_sec_level;
 447         __u8            pin_length;
 448         __u8            enc_key_size;
 449         __u8            io_capability;
 450         __u32           passkey_notify;
 451         __u8            passkey_entered;
 452         __u16           disc_timeout;
 453         __u16           conn_timeout;
 454         __u16           setting;
 455         __u16           le_conn_min_interval;
 456         __u16           le_conn_max_interval;
 457         __u16           le_conn_interval;
 458         __u16           le_conn_latency;
 459         __u16           le_supv_timeout;
 460         __u8            le_adv_data[HCI_MAX_AD_LENGTH];
 461         __u8            le_adv_data_len;
 462         __s8            rssi;
 463         __s8            tx_power;
 464         __s8            max_tx_power;
 465         unsigned long   flags;
 466
 467         __u32           clock;
 468         __u16           clock_accuracy;
 469
 470         unsigned long   conn_info_timestamp;
 471
 472         __u8            remote_cap;
 473         __u8            remote_auth;
 474         __u8            remote_id;
 475
 476         unsigned int    sent;
 477
 478         struct sk_buff_head data_q;
 479         struct list_head chan_list;
 480
 481         struct delayed_work disc_work;
 482         struct delayed_work auto_accept_work;
 483         struct delayed_work idle_work;
 484         struct delayed_work le_conn_timeout;
 485         struct work_struct  le_scan_cleanup;
 486
 487         struct device   dev;
 488         struct dentry   *debugfs;
 489
 490         struct hci_dev  *hdev;
 491         void            *l2cap_data;
 492         void            *sco_data;
 493         struct amp_mgr  *amp_mgr;
 494
 495         struct hci_conn *link;
 496
 497         void (*connect_cfm_cb)  (struct hci_conn *conn, u8 status);
 498         void (*security_cfm_cb) (struct hci_conn *conn, u8 status);
 499         void (*disconn_cfm_cb)  (struct hci_conn *conn, u8 reason);
 500 };
 501
 502 struct hci_chan {
 503         struct list_head list;
 504         __u16 handle;
 505         struct hci_conn *conn;
 506         struct sk_buff_head data_q;
 507         unsigned int    sent;
 508         __u8            state;
 509 };
 510
 511 struct hci_conn_params {
 512         struct list_head list;
 513         struct list_head action;
 514
 515         bdaddr_t addr;
 516         u8 addr_type;
 517
 518         u16 conn_min_interval;
 519         u16 conn_max_interval;
 520         u16 conn_latency;
 521         u16 supervision_timeout;
 522
 523         enum {
 524                 HCI_AUTO_CONN_DISABLED,
 525                 HCI_AUTO_CONN_REPORT,
 526                 HCI_AUTO_CONN_DIRECT,
 527                 HCI_AUTO_CONN_ALWAYS,
 528                 HCI_AUTO_CONN_LINK_LOSS,
 529                 HCI_AUTO_CONN_EXPLICIT,
 530         } auto_connect;
 531
 532         struct hci_conn *conn;
 533         bool explicit_connect;
 534 };
 535
 536 extern struct list_head hci_dev_list;
 537 extern struct list_head hci_cb_list;
 538 extern rwlock_t hci_dev_list_lock;
 539 extern struct mutex hci_cb_list_lock;
 540
 541 #define hci_dev_set_flag(hdev, nr)             set_bit((nr), (hdev)->dev_flags)
 542 #define hci_dev_clear_flag(hdev, nr)           clear_bit((nr), (hdev)->dev_flags)
 543 #define hci_dev_change_flag(hdev, nr)          change_bit((nr), (hdev)->dev_flags)
 544 #define hci_dev_test_flag(hdev, nr)            test_bit((nr), (hdev)->dev_flags)
 545 #define hci_dev_test_and_set_flag(hdev, nr)    test_and_set_bit((nr), (hdev)->dev_flags)
 546 #define hci_dev_test_and_clear_flag(hdev, nr)  test_and_clear_bit((nr), (hdev)->dev_flags)
 547 #define hci_dev_test_and_change_flag(hdev, nr) test_and_change_bit((nr), (hdev)->dev_flags)
 548
 549 #define hci_dev_clear_volatile_flags(hdev)                      \
 550         do {                                                    \
 551                 hci_dev_clear_flag(hdev, HCI_LE_SCAN);          \
 552                 hci_dev_clear_flag(hdev, HCI_LE_ADV);           \
 553                 hci_dev_clear_flag(hdev, HCI_PERIODIC_INQ);     \
 554         } while (0)
 555
 556 /* ----- HCI interface to upper protocols ----- */
 557 int l2cap_connect_ind(struct hci_dev *hdev, bdaddr_t *bdaddr);
 558 int l2cap_disconn_ind(struct hci_conn *hcon);
 559 void l2cap_recv_acldata(struct hci_conn *hcon, struct sk_buff *skb, u16 flags);
 560
 561 #if IS_ENABLED(CONFIG_BT_BREDR)
 562 int sco_connect_ind(struct hci_dev *hdev, bdaddr_t *bdaddr, __u8 *flags);
 563 void sco_recv_scodata(struct hci_conn *hcon, struct sk_buff *skb);
 564 #else
 565 static inline int sco_connect_ind(struct hci_dev *hdev, bdaddr_t *bdaddr,
 566                                   __u8 *flags)
 567 {
 568         return 0;
 569 }
 570
 571 static inline void sco_recv_scodata(struct hci_conn *hcon, struct sk_buff *skb)
 572 {
 573 }
 574 #endif
 575
 576 /* ----- Inquiry cache ----- */
 577 #define INQUIRY_CACHE_AGE_MAX   (HZ*30)   /* 30 seconds */
 578 #define INQUIRY_ENTRY_AGE_MAX   (HZ*60)   /* 60 seconds */
 579
 580 static inline void discovery_init(struct hci_dev *hdev)
 581 {
 582         hdev->discovery.state = DISCOVERY_STOPPED;
 583         INIT_LIST_HEAD(&hdev->discovery.all);
 584         INIT_LIST_HEAD(&hdev->discovery.unknown);
 585         INIT_LIST_HEAD(&hdev->discovery.resolve);
 586         hdev->discovery.report_invalid_rssi = true;
 587         hdev->discovery.rssi = HCI_RSSI_INVALID;
 588 }
 589
 590 static inline void hci_discovery_filter_clear(struct hci_dev *hdev)
 591 {
 592         hdev->discovery.result_filtering = false;
 593         hdev->discovery.report_invalid_rssi = true;
 594         hdev->discovery.rssi = HCI_RSSI_INVALID;
 595         hdev->discovery.uuid_count = 0;
 596         kfree(hdev->discovery.uuids);
 597         hdev->discovery.uuids = NULL;
 598         hdev->discovery.scan_start = 0;
 599         hdev->discovery.scan_duration = 0;
 600 }
 601
 602 bool hci_discovery_active(struct hci_dev *hdev);
 603
 604 void hci_discovery_set_state(struct hci_dev *hdev, int state);
 605
 606 static inline int inquiry_cache_empty(struct hci_dev *hdev)
 607 {
 608         return list_empty(&hdev->discovery.all);
 609 }
 610
 611 static inline long inquiry_cache_age(struct hci_dev *hdev)
 612 {
 613         struct discovery_state *c = &hdev->discovery;
 614         return jiffies - c->timestamp;
 615 }
 616
 617 static inline long inquiry_entry_age(struct inquiry_entry *e)
 618 {
 619         return jiffies - e->timestamp;
 620 }
 621
 622 struct inquiry_entry *hci_inquiry_cache_lookup(struct hci_dev *hdev,
 623                                                bdaddr_t *bdaddr);
 624 struct inquiry_entry *hci_inquiry_cache_lookup_unknown(struct hci_dev *hdev,
 625                                                        bdaddr_t *bdaddr);
 626 struct inquiry_entry *hci_inquiry_cache_lookup_resolve(struct hci_dev *hdev,
 627                                                        bdaddr_t *bdaddr,
 628                                                        int state);
 629 void hci_inquiry_cache_update_resolve(struct hci_dev *hdev,
 630                                       struct inquiry_entry *ie);
 631 u32 hci_inquiry_cache_update(struct hci_dev *hdev, struct inquiry_data *data,
 632                              bool name_known);
 633 void hci_inquiry_cache_flush(struct hci_dev *hdev);
 634
 635 /* ----- HCI Connections ----- */
 636 enum {
 637         HCI_CONN_AUTH_PEND,
 638         HCI_CONN_REAUTH_PEND,
 639         HCI_CONN_ENCRYPT_PEND,
 640         HCI_CONN_RSWITCH_PEND,
 641         HCI_CONN_MODE_CHANGE_PEND,
 642         HCI_CONN_SCO_SETUP_PEND,
 643         HCI_CONN_MGMT_CONNECTED,
 644         HCI_CONN_SSP_ENABLED,
 645         HCI_CONN_SC_ENABLED,
 646         HCI_CONN_AES_CCM,
 647         HCI_CONN_POWER_SAVE,
 648         HCI_CONN_FLUSH_KEY,
 649         HCI_CONN_ENCRYPT,
 650         HCI_CONN_AUTH,
 651         HCI_CONN_SECURE,
 652         HCI_CONN_FIPS,
 653         HCI_CONN_STK_ENCRYPT,
 654         HCI_CONN_AUTH_INITIATOR,
 655         HCI_CONN_DROP,
 656         HCI_CONN_PARAM_REMOVAL_PEND,
 657         HCI_CONN_NEW_LINK_KEY,
 658         HCI_CONN_SCANNING,
 659         HCI_CONN_AUTH_FAILURE,
 660 };
 661
 662 static inline bool hci_conn_ssp_enabled(struct hci_conn *conn)
 663 {
 664         struct hci_dev *hdev = conn->hdev;
 665         return hci_dev_test_flag(hdev, HCI_SSP_ENABLED) &&
 666                test_bit(HCI_CONN_SSP_ENABLED, &conn->flags);
 667 }
 668
 669 static inline bool hci_conn_sc_enabled(struct hci_conn *conn)
 670 {
 671         struct hci_dev *hdev = conn->hdev;
 672         return hci_dev_test_flag(hdev, HCI_SC_ENABLED) &&
 673                test_bit(HCI_CONN_SC_ENABLED, &conn->flags);
 674 }
 675
 676 static inline void hci_conn_hash_add(struct hci_dev *hdev, struct hci_conn *c)
 677 {
 678         struct hci_conn_hash *h = &hdev->conn_hash;
 679         list_add_rcu(&c->list, &h->list);
 680         switch (c->type) {
 681         case ACL_LINK:
 682                 h->acl_num++;
 683                 break;
 684         case AMP_LINK:
 685                 h->amp_num++;
 686                 break;
 687         case LE_LINK:
 688                 h->le_num++;
 689                 if (c->role == HCI_ROLE_SLAVE)
 690                         h->le_num_slave++;
 691                 break;
 692         case SCO_LINK:
 693         case ESCO_LINK:
 694                 h->sco_num++;
 695                 break;
 696         }
 697 }
 698
 699 static inline void hci_conn_hash_del(struct hci_dev *hdev, struct hci_conn *c)
 700 {
 701         struct hci_conn_hash *h = &hdev->conn_hash;
 702
 703         list_del_rcu(&c->list);
 704         synchronize_rcu();
 705
 706         switch (c->type) {
 707         case ACL_LINK:
 708                 h->acl_num--;
 709                 break;
 710         case AMP_LINK:
 711                 h->amp_num--;
 712                 break;
 713         case LE_LINK:
 714                 h->le_num--;
 715                 if (c->role == HCI_ROLE_SLAVE)
 716                         h->le_num_slave--;
 717                 break;
 718         case SCO_LINK:
 719         case ESCO_LINK:
 720                 h->sco_num--;
 721                 break;
 722         }
 723 }
 724
 725 static inline unsigned int hci_conn_num(struct hci_dev *hdev, __u8 type)
 726 {
 727         struct hci_conn_hash *h = &hdev->conn_hash;
 728         switch (type) {
 729         case ACL_LINK:
 730                 return h->acl_num;
 731         case AMP_LINK:
 732                 return h->amp_num;
 733         case LE_LINK:
 734                 return h->le_num;
 735         case SCO_LINK:
 736         case ESCO_LINK:
 737                 return h->sco_num;
 738         default:
 739                 return 0;
 740         }
 741 }
 742
 743 static inline unsigned int hci_conn_count(struct hci_dev *hdev)
 744 {
 745         struct hci_conn_hash *c = &hdev->conn_hash;
 746
 747         return c->acl_num + c->amp_num + c->sco_num + c->le_num;
 748 }
 749
 750 static inline __u8 hci_conn_lookup_type(struct hci_dev *hdev, __u16 handle)
 751 {
 752         struct hci_conn_hash *h = &hdev->conn_hash;
 753         struct hci_conn *c;
 754         __u8 type = INVALID_LINK;
 755
 756         rcu_read_lock();
 757
 758         list_for_each_entry_rcu(c, &h->list, list) {
 759                 if (c->handle == handle) {
 760                         type = c->type;
 761                         break;
 762                 }
 763         }
 764
 765         rcu_read_unlock();
 766
 767         return type;
 768 }
 769
 770 static inline struct hci_conn *hci_conn_hash_lookup_handle(struct hci_dev *hdev,
 771                                                                 __u16 handle)
 772 {
 773         struct hci_conn_hash *h = &hdev->conn_hash;
 774         struct hci_conn  *c;
 775
 776         rcu_read_lock();
 777
 778         list_for_each_entry_rcu(c, &h->list, list) {
 779                 if (c->handle == handle) {
 780                         rcu_read_unlock();
 781                         return c;
 782                 }
 783         }
 784         rcu_read_unlock();
 785
 786         return NULL;
 787 }
 788
 789 static inline struct hci_conn *hci_conn_hash_lookup_ba(struct hci_dev *hdev,
 790                                                         __u8 type, bdaddr_t *ba)
 791 {
 792         struct hci_conn_hash *h = &hdev->conn_hash;
 793         struct hci_conn  *c;
 794
 795         rcu_read_lock();
 796
 797         list_for_each_entry_rcu(c, &h->list, list) {
 798                 if (c->type == type && !bacmp(&c->dst, ba)) {
 799                         rcu_read_unlock();
 800                         return c;
 801                 }
 802         }
 803
 804         rcu_read_unlock();
 805
 806         return NULL;
 807 }
 808
 809 static inline struct hci_conn *hci_conn_hash_lookup_le(struct hci_dev *hdev,
 810                                                        bdaddr_t *ba,
 811                                                        __u8 ba_type)
 812 {
 813         struct hci_conn_hash *h = &hdev->conn_hash;
 814         struct hci_conn  *c;
 815
 816         rcu_read_lock();
 817
 818         list_for_each_entry_rcu(c, &h->list, list) {
 819                 if (c->type != LE_LINK)
 820                        continue;
 821
 822                 if (ba_type == c->dst_type && !bacmp(&c->dst, ba)) {
 823                         rcu_read_unlock();
 824                         return c;
 825                 }
 826         }
 827
 828         rcu_read_unlock();
 829
 830         return NULL;
 831 }
 832
 833 static inline struct hci_conn *hci_conn_hash_lookup_state(struct hci_dev *hdev,
 834                                                         __u8 type, __u16 state)
 835 {
 836         struct hci_conn_hash *h = &hdev->conn_hash;
 837         struct hci_conn  *c;
 838
 839         rcu_read_lock();
 840
 841         list_for_each_entry_rcu(c, &h->list, list) {
 842                 if (c->type == type && c->state == state) {
 843                         rcu_read_unlock();
 844                         return c;
 845                 }
 846         }
 847
 848         rcu_read_unlock();
 849
 850         return NULL;
 851 }
 852
 853 static inline struct hci_conn *hci_lookup_le_connect(struct hci_dev *hdev)
 854 {
 855         struct hci_conn_hash *h = &hdev->conn_hash;
 856         struct hci_conn  *c;
 857
 858         rcu_read_lock();
 859
 860         list_for_each_entry_rcu(c, &h->list, list) {
 861                 if (c->type == LE_LINK && c->state == BT_CONNECT &&
 862                     !test_bit(HCI_CONN_SCANNING, &c->flags)) {
 863                         rcu_read_unlock();
 864                         return c;
 865                 }
 866         }
 867
 868         rcu_read_unlock();
 869
 870         return NULL;
 871 }
 872
 873 int hci_disconnect(struct hci_conn *conn, __u8 reason);
 874 bool hci_setup_sync(struct hci_conn *conn, __u16 handle);
 875 void hci_sco_setup(struct hci_conn *conn, __u8 status);
 876
 877 struct hci_conn *hci_conn_add(struct hci_dev *hdev, int type, bdaddr_t *dst,
 878                               u8 role);
 879 int hci_conn_del(struct hci_conn *conn);
 880 void hci_conn_hash_flush(struct hci_dev *hdev);
 881 void hci_conn_check_pending(struct hci_dev *hdev);
 882
 883 struct hci_chan *hci_chan_create(struct hci_conn *conn);
 884 void hci_chan_del(struct hci_chan *chan);
 885 void hci_chan_list_flush(struct hci_conn *conn);
 886 struct hci_chan *hci_chan_lookup_handle(struct hci_dev *hdev, __u16 handle);
 887
 888 struct hci_conn *hci_connect_le_scan(struct hci_dev *hdev, bdaddr_t *dst,
 889                                      u8 dst_type, u8 sec_level,
 890                                      u16 conn_timeout);
 891 struct hci_conn *hci_connect_le(struct hci_dev *hdev, bdaddr_t *dst,
 892                                 u8 dst_type, u8 sec_level, u16 conn_timeout,
 893                                 u8 role);
 894 struct hci_conn *hci_connect_acl(struct hci_dev *hdev, bdaddr_t *dst,
 895                                  u8 sec_level, u8 auth_type);
 896 struct hci_conn *hci_connect_sco(struct hci_dev *hdev, int type, bdaddr_t *dst,
 897                                  __u16 setting);
 898 int hci_conn_check_link_mode(struct hci_conn *conn);
 899 int hci_conn_check_secure(struct hci_conn *conn, __u8 sec_level);
 900 int hci_conn_security(struct hci_conn *conn, __u8 sec_level, __u8 auth_type,
 901                       bool initiator);
 902 int hci_conn_switch_role(struct hci_conn *conn, __u8 role);
 903
 904 void hci_conn_enter_active_mode(struct hci_conn *conn, __u8 force_active);
 905
 906 void hci_le_conn_failed(struct hci_conn *conn, u8 status);
 907
 908 /*
 909  * hci_conn_get() and hci_conn_put() are used to control the life-time of an
 910  * "hci_conn" object. They do not guarantee that the hci_conn object is running,
 911  * working or anything else. They just guarantee that the object is available
 912  * and can be dereferenced. So you can use its locks, local variables and any
 913  * other constant data.
 914  * Before accessing runtime data, you _must_ lock the object and then check that
 915  * it is still running. As soon as you release the locks, the connection might
 916  * get dropped, though.
 917  *
 918  * On the other hand, hci_conn_hold() and hci_conn_drop() are used to control
 919  * how long the underlying connection is held. So every channel that runs on the
 920  * hci_conn object calls this to prevent the connection from disappearing. As
 921  * long as you hold a device, you must also guarantee that you have a valid
 922  * reference to the device via hci_conn_get() (or the initial reference from
 923  * hci_conn_add()).
 924  * The hold()/drop() ref-count is known to drop below 0 sometimes, which doesn't
 925  * break because nobody cares for that. But this means, we cannot use
 926  * _get()/_drop() in it, but require the caller to have a valid ref (FIXME).
 927  */
 928
 929 static inline struct hci_conn *hci_conn_get(struct hci_conn *conn)
 930 {
 931         get_device(&conn->dev);
 932         return conn;
 933 }
 934
 935 static inline void hci_conn_put(struct hci_conn *conn)
 936 {
 937         put_device(&conn->dev);
 938 }
 939
 940 static inline void hci_conn_hold(struct hci_conn *conn)
 941 {
 942         BT_DBG("hcon %p orig refcnt %d", conn, atomic_read(&conn->refcnt));
 943
 944         atomic_inc(&conn->refcnt);
 945         cancel_delayed_work(&conn->disc_work);
 946 }
 947
 948 static inline void hci_conn_drop(struct hci_conn *conn)
 949 {
 950         BT_DBG("hcon %p orig refcnt %d", conn, atomic_read(&conn->refcnt));
 951
 952         if (atomic_dec_and_test(&conn->refcnt)) {
 953                 unsigned long timeo;
 954
 955                 switch (conn->type) {
 956                 case ACL_LINK:
 957                 case LE_LINK:
 958                         cancel_delayed_work(&conn->idle_work);
 959                         if (conn->state == BT_CONNECTED) {
 960                                 timeo = conn->disc_timeout;
 961                                 if (!conn->out)
 962                                         timeo *= 2;
 963                         } else {
 964                                 timeo = 0;
 965                         }
 966                         break;
 967
 968                 case AMP_LINK:
 969                         timeo = conn->disc_timeout;
 970                         break;
 971
 972                 default:
 973                         timeo = 0;
 974                         break;
 975                 }
 976
 977                 cancel_delayed_work(&conn->disc_work);
 978                 queue_delayed_work(conn->hdev->workqueue,
 979                                    &conn->disc_work, timeo);
 980         }
 981 }
 982
 983 /* ----- HCI Devices ----- */
 984 static inline void hci_dev_put(struct hci_dev *d)
 985 {
 986         BT_DBG("%s orig refcnt %d", d->name,
 987                atomic_read(&d->dev.kobj.kref.refcount));
 988
 989         put_device(&d->dev);
 990 }
 991
 992 static inline struct hci_dev *hci_dev_hold(struct hci_dev *d)
 993 {
 994         BT_DBG("%s orig refcnt %d", d->name,
 995                atomic_read(&d->dev.kobj.kref.refcount));
 996
 997         get_device(&d->dev);
 998         return d;
 999 }
1000
1001 #define hci_dev_lock(d)         mutex_lock(&d->lock)
1002 #define hci_dev_unlock(d)       mutex_unlock(&d->lock)
1003
1004 #define to_hci_dev(d) container_of(d, struct hci_dev, dev)
1005 #define to_hci_conn(c) container_of(c, struct hci_conn, dev)
1006
1007 static inline void *hci_get_drvdata(struct hci_dev *hdev)
1008 {
1009         return dev_get_drvdata(&hdev->dev);
1010 }
1011
1012 static inline void hci_set_drvdata(struct hci_dev *hdev, void *data)
1013 {
1014         dev_set_drvdata(&hdev->dev, data);
1015 }
1016
1017 struct hci_dev *hci_dev_get(int index);
1018 struct hci_dev *hci_get_route(bdaddr_t *dst, bdaddr_t *src);
1019
1020 struct hci_dev *hci_alloc_dev(void);
1021 void hci_free_dev(struct hci_dev *hdev);
1022 int hci_register_dev(struct hci_dev *hdev);
1023 void hci_unregister_dev(struct hci_dev *hdev);
1024 int hci_suspend_dev(struct hci_dev *hdev);
1025 int hci_resume_dev(struct hci_dev *hdev);
1026 int hci_reset_dev(struct hci_dev *hdev);
1027 int hci_recv_frame(struct hci_dev *hdev, struct sk_buff *skb);
1028 int hci_recv_diag(struct hci_dev *hdev, struct sk_buff *skb);
1029 void hci_set_hw_info(struct hci_dev *hdev, const char *fmt, ...);
1030 void hci_set_fw_info(struct hci_dev *hdev, const char *fmt, ...);
1031 int hci_dev_open(__u16 dev);
1032 int hci_dev_close(__u16 dev);
1033 int hci_dev_do_close(struct hci_dev *hdev);
1034 int hci_dev_reset(__u16 dev);
1035 int hci_dev_reset_stat(__u16 dev);
1036 int hci_dev_cmd(unsigned int cmd, void __user *arg);
1037 int hci_get_dev_list(void __user *arg);
1038 int hci_get_dev_info(void __user *arg);
1039 int hci_get_conn_list(void __user *arg);
1040 int hci_get_conn_info(struct hci_dev *hdev, void __user *arg);
1041 int hci_get_auth_info(struct hci_dev *hdev, void __user *arg);
1042 int hci_inquiry(void __user *arg);
1043
1044 struct bdaddr_list *hci_bdaddr_list_lookup(struct list_head *list,
1045                                            bdaddr_t *bdaddr, u8 type);
1046 int hci_bdaddr_list_add(struct list_head *list, bdaddr_t *bdaddr, u8 type);
1047 int hci_bdaddr_list_del(struct list_head *list, bdaddr_t *bdaddr, u8 type);
1048 void hci_bdaddr_list_clear(struct list_head *list);
1049
1050 struct hci_conn_params *hci_conn_params_lookup(struct hci_dev *hdev,
1051                                                bdaddr_t *addr, u8 addr_type);
1052 struct hci_conn_params *hci_conn_params_add(struct hci_dev *hdev,
1053                                             bdaddr_t *addr, u8 addr_type);
1054 void hci_conn_params_del(struct hci_dev *hdev, bdaddr_t *addr, u8 addr_type);
1055 void hci_conn_params_clear_disabled(struct hci_dev *hdev);
1056
1057 struct hci_conn_params *hci_pend_le_action_lookup(struct list_head *list,
1058                                                   bdaddr_t *addr,
1059                                                   u8 addr_type);
1060
1061 void hci_uuids_clear(struct hci_dev *hdev);
1062
1063 void hci_link_keys_clear(struct hci_dev *hdev);
1064 struct link_key *hci_find_link_key(struct hci_dev *hdev, bdaddr_t *bdaddr);
1065 struct link_key *hci_add_link_key(struct hci_dev *hdev, struct hci_conn *conn,
1066                                   bdaddr_t *bdaddr, u8 *val, u8 type,
1067                                   u8 pin_len, bool *persistent);
1068 struct smp_ltk *hci_add_ltk(struct hci_dev *hdev, bdaddr_t *bdaddr,
1069                             u8 addr_type, u8 type, u8 authenticated,
1070                             u8 tk[16], u8 enc_size, __le16 ediv, __le64 rand);
1071 struct smp_ltk *hci_find_ltk(struct hci_dev *hdev, bdaddr_t *bdaddr,
1072                              u8 addr_type, u8 role);
1073 int hci_remove_ltk(struct hci_dev *hdev, bdaddr_t *bdaddr, u8 bdaddr_type);
1074 void hci_smp_ltks_clear(struct hci_dev *hdev);
1075 int hci_remove_link_key(struct hci_dev *hdev, bdaddr_t *bdaddr);
1076
1077 struct smp_irk *hci_find_irk_by_rpa(struct hci_dev *hdev, bdaddr_t *rpa);
1078 struct smp_irk *hci_find_irk_by_addr(struct hci_dev *hdev, bdaddr_t *bdaddr,
1079                                      u8 addr_type);
1080 struct smp_irk *hci_add_irk(struct hci_dev *hdev, bdaddr_t *bdaddr,
1081                             u8 addr_type, u8 val[16], bdaddr_t *rpa);
1082 void hci_remove_irk(struct hci_dev *hdev, bdaddr_t *bdaddr, u8 addr_type);
1083 void hci_smp_irks_clear(struct hci_dev *hdev);
1084
1085 bool hci_bdaddr_is_paired(struct hci_dev *hdev, bdaddr_t *bdaddr, u8 type);
1086
1087 void hci_remote_oob_data_clear(struct hci_dev *hdev);
1088 struct oob_data *hci_find_remote_oob_data(struct hci_dev *hdev,
1089                                           bdaddr_t *bdaddr, u8 bdaddr_type);
1090 int hci_add_remote_oob_data(struct hci_dev *hdev, bdaddr_t *bdaddr,
1091                             u8 bdaddr_type, u8 *hash192, u8 *rand192,
1092                             u8 *hash256, u8 *rand256);
1093 int hci_remove_remote_oob_data(struct hci_dev *hdev, bdaddr_t *bdaddr,
1094                                u8 bdaddr_type);
1095
1096 void hci_adv_instances_clear(struct hci_dev *hdev);
1097 struct adv_info *hci_find_adv_instance(struct hci_dev *hdev, u8 instance);
1098 struct adv_info *hci_get_next_instance(struct hci_dev *hdev, u8 instance);
1099 int hci_add_adv_instance(struct hci_dev *hdev, u8 instance, u32 flags,
1100                          u16 adv_data_len, u8 *adv_data,
1101                          u16 scan_rsp_len, u8 *scan_rsp_data,
1102                          u16 timeout, u16 duration);
1103 int hci_remove_adv_instance(struct hci_dev *hdev, u8 instance);
1104
1105 void hci_event_packet(struct hci_dev *hdev, struct sk_buff *skb);
1106
1107 void hci_init_sysfs(struct hci_dev *hdev);
1108 void hci_conn_init_sysfs(struct hci_conn *conn);
1109 void hci_conn_add_sysfs(struct hci_conn *conn);
1110 void hci_conn_del_sysfs(struct hci_conn *conn);
1111
1112 #define SET_HCIDEV_DEV(hdev, pdev) ((hdev)->dev.parent = (pdev))
1113
1114 /* ----- LMP capabilities ----- */
1115 #define lmp_encrypt_capable(dev)   ((dev)->features[0][0] & LMP_ENCRYPT)
1116 #define lmp_rswitch_capable(dev)   ((dev)->features[0][0] & LMP_RSWITCH)
1117 #define lmp_hold_capable(dev)      ((dev)->features[0][0] & LMP_HOLD)
1118 #define lmp_sniff_capable(dev)     ((dev)->features[0][0] & LMP_SNIFF)
1119 #define lmp_park_capable(dev)      ((dev)->features[0][1] & LMP_PARK)
1120 #define lmp_inq_rssi_capable(dev)  ((dev)->features[0][3] & LMP_RSSI_INQ)
1121 #define lmp_esco_capable(dev)      ((dev)->features[0][3] & LMP_ESCO)
1122 #define lmp_bredr_capable(dev)     (!((dev)->features[0][4] & LMP_NO_BREDR))
1123 #define lmp_le_capable(dev)        ((dev)->features[0][4] & LMP_LE)
1124 #define lmp_sniffsubr_capable(dev) ((dev)->features[0][5] & LMP_SNIFF_SUBR)
1125 #define lmp_pause_enc_capable(dev) ((dev)->features[0][5] & LMP_PAUSE_ENC)
1126 #define lmp_ext_inq_capable(dev)   ((dev)->features[0][6] & LMP_EXT_INQ)
1127 #define lmp_le_br_capable(dev)     (!!((dev)->features[0][6] & LMP_SIMUL_LE_BR))
1128 #define lmp_ssp_capable(dev)       ((dev)->features[0][6] & LMP_SIMPLE_PAIR)
1129 #define lmp_no_flush_capable(dev)  ((dev)->features[0][6] & LMP_NO_FLUSH)
1130 #define lmp_lsto_capable(dev)      ((dev)->features[0][7] & LMP_LSTO)
1131 #define lmp_inq_tx_pwr_capable(dev) ((dev)->features[0][7] & LMP_INQ_TX_PWR)
1132 #define lmp_ext_feat_capable(dev)  ((dev)->features[0][7] & LMP_EXTFEATURES)
1133 #define lmp_transp_capable(dev)    ((dev)->features[0][2] & LMP_TRANSPARENT)
1134
1135 /* ----- Extended LMP capabilities ----- */
1136 #define lmp_csb_master_capable(dev) ((dev)->features[2][0] & LMP_CSB_MASTER)
1137 #define lmp_csb_slave_capable(dev)  ((dev)->features[2][0] & LMP_CSB_SLAVE)
1138 #define lmp_sync_train_capable(dev) ((dev)->features[2][0] & LMP_SYNC_TRAIN)
1139 #define lmp_sync_scan_capable(dev)  ((dev)->features[2][0] & LMP_SYNC_SCAN)
1140 #define lmp_sc_capable(dev)         ((dev)->features[2][1] & LMP_SC)
1141 #define lmp_ping_capable(dev)       ((dev)->features[2][1] & LMP_PING)
1142
1143 /* ----- Host capabilities ----- */
1144 #define lmp_host_ssp_capable(dev)  ((dev)->features[1][0] & LMP_HOST_SSP)
1145 #define lmp_host_sc_capable(dev)   ((dev)->features[1][0] & LMP_HOST_SC)
1146 #define lmp_host_le_capable(dev)   (!!((dev)->features[1][0] & LMP_HOST_LE))
1147 #define lmp_host_le_br_capable(dev) (!!((dev)->features[1][0] & LMP_HOST_LE_BREDR))
1148
1149 #define hdev_is_powered(dev)   (test_bit(HCI_UP, &(dev)->flags) && \
1150                                 !hci_dev_test_flag(dev, HCI_AUTO_OFF))
1151 #define bredr_sc_enabled(dev)  (lmp_sc_capable(dev) && \
1152                                 hci_dev_test_flag(dev, HCI_SC_ENABLED))
1153
1154 /* ----- HCI protocols ----- */
1155 #define HCI_PROTO_DEFER             0x01
1156
1157 static inline int hci_proto_connect_ind(struct hci_dev *hdev, bdaddr_t *bdaddr,
1158                                         __u8 type, __u8 *flags)
1159 {
1160         switch (type) {
1161         case ACL_LINK:
1162                 return l2cap_connect_ind(hdev, bdaddr);
1163
1164         case SCO_LINK:
1165         case ESCO_LINK:
1166                 return sco_connect_ind(hdev, bdaddr, flags);
1167
1168         default:
1169                 BT_ERR("unknown link type %d", type);
1170                 return -EINVAL;
1171         }
1172 }
1173
1174 static inline int hci_proto_disconn_ind(struct hci_conn *conn)
1175 {
1176         if (conn->type != ACL_LINK && conn->type != LE_LINK)
1177                 return HCI_ERROR_REMOTE_USER_TERM;
1178
1179         return l2cap_disconn_ind(conn);
1180 }
1181
1182 /* ----- HCI callbacks ----- */
1183 struct hci_cb {
1184         struct list_head list;
1185
1186         char *name;
1187
1188         void (*connect_cfm)     (struct hci_conn *conn, __u8 status);
1189         void (*disconn_cfm)     (struct hci_conn *conn, __u8 status);
1190         void (*security_cfm)    (struct hci_conn *conn, __u8 status,
1191                                                                 __u8 encrypt);
1192         void (*key_change_cfm)  (struct hci_conn *conn, __u8 status);
1193         void (*role_switch_cfm) (struct hci_conn *conn, __u8 status, __u8 role);
1194 };
1195
1196 static inline void hci_connect_cfm(struct hci_conn *conn, __u8 status)
1197 {
1198         struct hci_cb *cb;
1199
1200         mutex_lock(&hci_cb_list_lock);
1201         list_for_each_entry(cb, &hci_cb_list, list) {
1202                 if (cb->connect_cfm)
1203                         cb->connect_cfm(conn, status);
1204         }
1205         mutex_unlock(&hci_cb_list_lock);
1206
1207         if (conn->connect_cfm_cb)
1208                 conn->connect_cfm_cb(conn, status);
1209 }
1210
1211 static inline void hci_disconn_cfm(struct hci_conn *conn, __u8 reason)
1212 {
1213         struct hci_cb *cb;
1214
1215         mutex_lock(&hci_cb_list_lock);
1216         list_for_each_entry(cb, &hci_cb_list, list) {
1217                 if (cb->disconn_cfm)
1218                         cb->disconn_cfm(conn, reason);
1219         }
1220         mutex_unlock(&hci_cb_list_lock);
1221
1222         if (conn->disconn_cfm_cb)
1223                 conn->disconn_cfm_cb(conn, reason);
1224 }
1225
1226 static inline void hci_auth_cfm(struct hci_conn *conn, __u8 status)
1227 {
1228         struct hci_cb *cb;
1229         __u8 encrypt;
1230
1231         if (test_bit(HCI_CONN_ENCRYPT_PEND, &conn->flags))
1232                 return;
1233
1234         encrypt = test_bit(HCI_CONN_ENCRYPT, &conn->flags) ? 0x01 : 0x00;
1235
1236         mutex_lock(&hci_cb_list_lock);
1237         list_for_each_entry(cb, &hci_cb_list, list) {
1238                 if (cb->security_cfm)
1239                         cb->security_cfm(conn, status, encrypt);
1240         }
1241         mutex_unlock(&hci_cb_list_lock);
1242
1243         if (conn->security_cfm_cb)
1244                 conn->security_cfm_cb(conn, status);
1245 }
1246
1247 static inline void hci_encrypt_cfm(struct hci_conn *conn, __u8 status,
1248                                                                 __u8 encrypt)
1249 {
1250         struct hci_cb *cb;
1251
1252         if (conn->sec_level == BT_SECURITY_SDP)
1253                 conn->sec_level = BT_SECURITY_LOW;
1254
1255         if (conn->pending_sec_level > conn->sec_level)
1256                 conn->sec_level = conn->pending_sec_level;
1257
1258         mutex_lock(&hci_cb_list_lock);
1259         list_for_each_entry(cb, &hci_cb_list, list) {
1260                 if (cb->security_cfm)
1261                         cb->security_cfm(conn, status, encrypt);
1262         }
1263         mutex_unlock(&hci_cb_list_lock);
1264
1265         if (conn->security_cfm_cb)
1266                 conn->security_cfm_cb(conn, status);
1267 }
1268
1269 static inline void hci_key_change_cfm(struct hci_conn *conn, __u8 status)
1270 {
1271         struct hci_cb *cb;
1272
1273         mutex_lock(&hci_cb_list_lock);
1274         list_for_each_entry(cb, &hci_cb_list, list) {
1275                 if (cb->key_change_cfm)
1276                         cb->key_change_cfm(conn, status);
1277         }
1278         mutex_unlock(&hci_cb_list_lock);
1279 }
1280
1281 static inline void hci_role_switch_cfm(struct hci_conn *conn, __u8 status,
1282                                                                 __u8 role)
1283 {
1284         struct hci_cb *cb;
1285
1286         mutex_lock(&hci_cb_list_lock);
1287         list_for_each_entry(cb, &hci_cb_list, list) {
1288                 if (cb->role_switch_cfm)
1289                         cb->role_switch_cfm(conn, status, role);
1290         }
1291         mutex_unlock(&hci_cb_list_lock);
1292 }
1293
1294 static inline void *eir_get_data(u8 *eir, size_t eir_len, u8 type,
1295                                  size_t *data_len)
1296 {
1297         size_t parsed = 0;
1298
1299         if (eir_len < 2)
1300                 return NULL;
1301
1302         while (parsed < eir_len - 1) {
1303                 u8 field_len = eir[0];
1304
1305                 if (field_len == 0)
1306                         break;
1307
1308                 parsed += field_len + 1;
1309
1310                 if (parsed > eir_len)
1311                         break;
1312
1313                 if (eir[1] != type) {
1314                         eir += field_len + 1;
1315                         continue;
1316                 }
1317
1318                 /* Zero length data */
1319                 if (field_len == 1)
1320                         return NULL;
1321
1322                 if (data_len)
1323                         *data_len = field_len - 1;
1324
1325                 return &eir[2];
1326         }
1327
1328         return NULL;
1329 }
1330
1331 static inline bool hci_bdaddr_is_rpa(bdaddr_t *bdaddr, u8 addr_type)
1332 {
1333         if (addr_type != ADDR_LE_DEV_RANDOM)
1334                 return false;
1335
1336         if ((bdaddr->b[5] & 0xc0) == 0x40)
1337                return true;
1338
1339         return false;
1340 }
1341
1342 static inline bool hci_is_identity_address(bdaddr_t *addr, u8 addr_type)
1343 {
1344         if (addr_type == ADDR_LE_DEV_PUBLIC)
1345                 return true;
1346
1347         /* Check for Random Static address type */
1348         if ((addr->b[5] & 0xc0) == 0xc0)
1349                 return true;
1350
1351         return false;
1352 }
1353
1354 static inline struct smp_irk *hci_get_irk(struct hci_dev *hdev,
1355                                           bdaddr_t *bdaddr, u8 addr_type)
1356 {
1357         if (!hci_bdaddr_is_rpa(bdaddr, addr_type))
1358                 return NULL;
1359
1360         return hci_find_irk_by_rpa(hdev, bdaddr);
1361 }
1362
1363 static inline int hci_check_conn_params(u16 min, u16 max, u16 latency,
1364                                         u16 to_multiplier)
1365 {
1366         u16 max_latency;
1367
1368         if (min > max || min < 6 || max > 3200)
1369                 return -EINVAL;
1370
1371         if (to_multiplier < 10 || to_multiplier > 3200)
1372                 return -EINVAL;
1373
1374         if (max >= to_multiplier * 8)
1375                 return -EINVAL;
1376
1377         max_latency = (to_multiplier * 4 / max) - 1;
1378         if (latency > 499 || latency > max_latency)
1379                 return -EINVAL;
1380
1381         return 0;
1382 }
1383
1384 int hci_register_cb(struct hci_cb *hcb);
1385 int hci_unregister_cb(struct hci_cb *hcb);
1386
1387 struct sk_buff *__hci_cmd_sync(struct hci_dev *hdev, u16 opcode, u32 plen,
1388                                const void *param, u32 timeout);
1389 struct sk_buff *__hci_cmd_sync_ev(struct hci_dev *hdev, u16 opcode, u32 plen,
1390                                   const void *param, u8 event, u32 timeout);
1391
1392 int hci_send_cmd(struct hci_dev *hdev, __u16 opcode, __u32 plen,
1393                  const void *param);
1394 void hci_send_acl(struct hci_chan *chan, struct sk_buff *skb, __u16 flags);
1395 void hci_send_sco(struct hci_conn *conn, struct sk_buff *skb);
1396
1397 void *hci_sent_cmd_data(struct hci_dev *hdev, __u16 opcode);
1398
1399 struct sk_buff *hci_cmd_sync(struct hci_dev *hdev, u16 opcode, u32 plen,
1400                              const void *param, u32 timeout);
1401
1402 /* ----- HCI Sockets ----- */
1403 void hci_send_to_sock(struct hci_dev *hdev, struct sk_buff *skb);
1404 void hci_send_to_channel(unsigned short channel, struct sk_buff *skb,
1405                          int flag, struct sock *skip_sk);
1406 void hci_send_to_monitor(struct hci_dev *hdev, struct sk_buff *skb);
1407
1408 void hci_sock_dev_event(struct hci_dev *hdev, int event);
1409
1410 #define HCI_MGMT_VAR_LEN        BIT(0)
1411 #define HCI_MGMT_NO_HDEV        BIT(1)
1412 #define HCI_MGMT_UNTRUSTED      BIT(2)
1413 #define HCI_MGMT_UNCONFIGURED   BIT(3)
1414
1415 struct hci_mgmt_handler {
1416         int (*func) (struct sock *sk, struct hci_dev *hdev, void *data,
1417                      u16 data_len);
1418         size_t data_len;
1419         unsigned long flags;
1420 };
1421
1422 struct hci_mgmt_chan {
1423         struct list_head list;
1424         unsigned short channel;
1425         size_t handler_count;
1426         const struct hci_mgmt_handler *handlers;
1427         void (*hdev_init) (struct sock *sk, struct hci_dev *hdev);
1428 };
1429
1430 int hci_mgmt_chan_register(struct hci_mgmt_chan *c);
1431 void hci_mgmt_chan_unregister(struct hci_mgmt_chan *c);
1432
1433 /* Management interface */
1434 #define DISCOV_TYPE_BREDR               (BIT(BDADDR_BREDR))
1435 #define DISCOV_TYPE_LE                  (BIT(BDADDR_LE_PUBLIC) | \
1436                                          BIT(BDADDR_LE_RANDOM))
1437 #define DISCOV_TYPE_INTERLEAVED         (BIT(BDADDR_BREDR) | \
1438                                          BIT(BDADDR_LE_PUBLIC) | \
1439                                          BIT(BDADDR_LE_RANDOM))
1440
1441 /* These LE scan and inquiry parameters were chosen according to LE General
1442  * Discovery Procedure specification.
1443  */
1444 #define DISCOV_LE_SCAN_WIN              0x12
1445 #define DISCOV_LE_SCAN_INT              0x12
1446 #define DISCOV_LE_TIMEOUT               10240   /* msec */
1447 #define DISCOV_INTERLEAVED_TIMEOUT      5120    /* msec */
1448 #define DISCOV_INTERLEAVED_INQUIRY_LEN  0x04
1449 #define DISCOV_BREDR_INQUIRY_LEN        0x08
1450 #define DISCOV_LE_RESTART_DELAY         msecs_to_jiffies(200)   /* msec */
1451
1452 int mgmt_new_settings(struct hci_dev *hdev);
1453 void mgmt_index_added(struct hci_dev *hdev);
1454 void mgmt_index_removed(struct hci_dev *hdev);
1455 void mgmt_set_powered_failed(struct hci_dev *hdev, int err);
1456 void mgmt_power_on(struct hci_dev *hdev, int err);
1457 void __mgmt_power_off(struct hci_dev *hdev);
1458 void mgmt_new_link_key(struct hci_dev *hdev, struct link_key *key,
1459                        bool persistent);
1460 void mgmt_device_connected(struct hci_dev *hdev, struct hci_conn *conn,
1461                            u32 flags, u8 *name, u8 name_len);
1462 void mgmt_device_disconnected(struct hci_dev *hdev, bdaddr_t *bdaddr,
1463                               u8 link_type, u8 addr_type, u8 reason,
1464                               bool mgmt_connected);
1465 void mgmt_disconnect_failed(struct hci_dev *hdev, bdaddr_t *bdaddr,
1466                             u8 link_type, u8 addr_type, u8 status);
1467 void mgmt_connect_failed(struct hci_dev *hdev, bdaddr_t *bdaddr, u8 link_type,
1468                          u8 addr_type, u8 status);
1469 void mgmt_pin_code_request(struct hci_dev *hdev, bdaddr_t *bdaddr, u8 secure);
1470 void mgmt_pin_code_reply_complete(struct hci_dev *hdev, bdaddr_t *bdaddr,
1471                                   u8 status);
1472 void mgmt_pin_code_neg_reply_complete(struct hci_dev *hdev, bdaddr_t *bdaddr,
1473                                       u8 status);
1474 int mgmt_user_confirm_request(struct hci_dev *hdev, bdaddr_t *bdaddr,
1475                               u8 link_type, u8 addr_type, u32 value,
1476                               u8 confirm_hint);
1477 int mgmt_user_confirm_reply_complete(struct hci_dev *hdev, bdaddr_t *bdaddr,
1478                                      u8 link_type, u8 addr_type, u8 status);
1479 int mgmt_user_confirm_neg_reply_complete(struct hci_dev *hdev, bdaddr_t *bdaddr,
1480                                          u8 link_type, u8 addr_type, u8 status);
1481 int mgmt_user_passkey_request(struct hci_dev *hdev, bdaddr_t *bdaddr,
1482                               u8 link_type, u8 addr_type);
1483 int mgmt_user_passkey_reply_complete(struct hci_dev *hdev, bdaddr_t *bdaddr,
1484                                      u8 link_type, u8 addr_type, u8 status);
1485 int mgmt_user_passkey_neg_reply_complete(struct hci_dev *hdev, bdaddr_t *bdaddr,
1486                                          u8 link_type, u8 addr_type, u8 status);
1487 int mgmt_user_passkey_notify(struct hci_dev *hdev, bdaddr_t *bdaddr,
1488                              u8 link_type, u8 addr_type, u32 passkey,
1489                              u8 entered);
1490 void mgmt_auth_failed(struct hci_conn *conn, u8 status);
1491 void mgmt_auth_enable_complete(struct hci_dev *hdev, u8 status);
1492 void mgmt_ssp_enable_complete(struct hci_dev *hdev, u8 enable, u8 status);
1493 void mgmt_set_class_of_dev_complete(struct hci_dev *hdev, u8 *dev_class,
1494                                     u8 status);
1495 void mgmt_set_local_name_complete(struct hci_dev *hdev, u8 *name, u8 status);
1496 void mgmt_start_discovery_complete(struct hci_dev *hdev, u8 status);
1497 void mgmt_stop_discovery_complete(struct hci_dev *hdev, u8 status);
1498 void mgmt_device_found(struct hci_dev *hdev, bdaddr_t *bdaddr, u8 link_type,
1499                        u8 addr_type, u8 *dev_class, s8 rssi, u32 flags,
1500                        u8 *eir, u16 eir_len, u8 *scan_rsp, u8 scan_rsp_len);
1501 void mgmt_remote_name(struct hci_dev *hdev, bdaddr_t *bdaddr, u8 link_type,
1502                       u8 addr_type, s8 rssi, u8 *name, u8 name_len);
1503 void mgmt_discovering(struct hci_dev *hdev, u8 discovering);
1504 bool mgmt_powering_down(struct hci_dev *hdev);
1505 void mgmt_new_ltk(struct hci_dev *hdev, struct smp_ltk *key, bool persistent);
1506 void mgmt_new_irk(struct hci_dev *hdev, struct smp_irk *irk, bool persistent);
1507 void mgmt_new_csrk(struct hci_dev *hdev, struct smp_csrk *csrk,
1508                    bool persistent);
1509 void mgmt_new_conn_param(struct hci_dev *hdev, bdaddr_t *bdaddr,
1510                          u8 bdaddr_type, u8 store_hint, u16 min_interval,
1511                          u16 max_interval, u16 latency, u16 timeout);
1512 void mgmt_smp_complete(struct hci_conn *conn, bool complete);
1513 bool mgmt_get_connectable(struct hci_dev *hdev);
1514 void mgmt_set_connectable_complete(struct hci_dev *hdev, u8 status);
1515 void mgmt_set_discoverable_complete(struct hci_dev *hdev, u8 status);
1516 u8 mgmt_get_adv_discov_flags(struct hci_dev *hdev);
1517 void mgmt_advertising_added(struct sock *sk, struct hci_dev *hdev,
1518                             u8 instance);
1519 void mgmt_advertising_removed(struct sock *sk, struct hci_dev *hdev,
1520                               u8 instance);
1521
1522 u8 hci_le_conn_update(struct hci_conn *conn, u16 min, u16 max, u16 latency,
1523                       u16 to_multiplier);
1524 void hci_le_start_enc(struct hci_conn *conn, __le16 ediv, __le64 rand,
1525                       __u8 ltk[16], __u8 key_size);
1526
1527 void hci_copy_identity_address(struct hci_dev *hdev, bdaddr_t *bdaddr,
1528                                u8 *bdaddr_type);
1529
1530 #define SCO_AIRMODE_MASK       0x0003
1531 #define SCO_AIRMODE_CVSD       0x0000
1532 #define SCO_AIRMODE_TRANSP     0x0003
1533
1534 #endif /* __HCI_CORE_H */