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 maximum id value */
  36 #define HCI_MAX_ID 10000
  37
  38 /* HCI Core structures */
  39 struct inquiry_data {
  40         bdaddr_t        bdaddr;
  41         __u8            pscan_rep_mode;
  42         __u8            pscan_period_mode;
  43         __u8            pscan_mode;
  44         __u8            dev_class[3];
  45         __le16          clock_offset;
  46         __s8            rssi;
  47         __u8            ssp_mode;
  48 };
  49
  50 struct inquiry_entry {
  51         struct list_head        all;            /* inq_cache.all */
  52         struct list_head        list;           /* unknown or resolve */
  53         enum {
  54                 NAME_NOT_KNOWN,
  55                 NAME_NEEDED,
  56                 NAME_PENDING,
  57                 NAME_KNOWN,
  58         } name_state;
  59         __u32                   timestamp;
  60         struct inquiry_data     data;
  61 };
  62
  63 struct discovery_state {
  64         int                     type;
  65         enum {
  66                 DISCOVERY_STOPPED,
  67                 DISCOVERY_STARTING,
  68                 DISCOVERY_FINDING,
  69                 DISCOVERY_RESOLVING,
  70                 DISCOVERY_STOPPING,
  71         } state;
  72         struct list_head        all;    /* All devices found during inquiry */
  73         struct list_head        unknown;        /* Name state not known */
  74         struct list_head        resolve;        /* Name needs to be resolved */
  75         __u32                   timestamp;
  76         bdaddr_t                last_adv_addr;
  77         u8                      last_adv_addr_type;
  78         s8                      last_adv_rssi;
  79         u32                     last_adv_flags;
  80         u8                      last_adv_data[HCI_MAX_AD_LENGTH];
  81         u8                      last_adv_data_len;
  82         bool                    report_invalid_rssi;
  83         bool                    result_filtering;
  84         bool                    limited;
  85         s8                      rssi;
  86         u16                     uuid_count;
  87         u8                      (*uuids)[16];
  88         unsigned long           scan_start;
  89         unsigned long           scan_duration;
  90 };
  91
  92 struct hci_conn_hash {
  93         struct list_head list;
  94         unsigned int     acl_num;
  95         unsigned int     amp_num;
  96         unsigned int     sco_num;
  97         unsigned int     le_num;
  98         unsigned int     le_num_slave;
  99 };
 100
 101 struct bdaddr_list {
 102         struct list_head list;
 103         bdaddr_t bdaddr;
 104         u8 bdaddr_type;
 105 };
 106
 107 struct bt_uuid {
 108         struct list_head list;
 109         u8 uuid[16];
 110         u8 size;
 111         u8 svc_hint;
 112 };
 113
 114 struct smp_csrk {
 115         bdaddr_t bdaddr;
 116         u8 bdaddr_type;
 117         u8 type;
 118         u8 val[16];
 119 };
 120
 121 struct smp_ltk {
 122         struct list_head list;
 123         struct rcu_head rcu;
 124         bdaddr_t bdaddr;
 125         u8 bdaddr_type;
 126         u8 authenticated;
 127         u8 type;
 128         u8 enc_size;
 129         __le16 ediv;
 130         __le64 rand;
 131         u8 val[16];
 132 };
 133
 134 struct smp_irk {
 135         struct list_head list;
 136         struct rcu_head rcu;
 137         bdaddr_t rpa;
 138         bdaddr_t bdaddr;
 139         u8 addr_type;
 140         u8 val[16];
 141 };
 142
 143 struct link_key {
 144         struct list_head list;
 145         struct rcu_head rcu;
 146         bdaddr_t bdaddr;
 147         u8 type;
 148         u8 val[HCI_LINK_KEY_SIZE];
 149         u8 pin_len;
 150 };
 151
 152 struct oob_data {
 153         struct list_head list;
 154         bdaddr_t bdaddr;
 155         u8 bdaddr_type;
 156         u8 present;
 157         u8 hash192[16];
 158         u8 rand192[16];
 159         u8 hash256[16];
 160         u8 rand256[16];
 161 };
 162
 163 struct adv_info {
 164         struct list_head list;
 165         bool pending;
 166         __u8    instance;
 167         __u32   flags;
 168         __u16   timeout;
 169         __u16   remaining_time;
 170         __u16   duration;
 171         __u16   adv_data_len;
 172         __u8    adv_data[HCI_MAX_AD_LENGTH];
 173         __u16   scan_rsp_len;
 174         __u8    scan_rsp_data[HCI_MAX_AD_LENGTH];
 175 };
 176
 177 #define HCI_MAX_ADV_INSTANCES           5
 178 #define HCI_DEFAULT_ADV_DURATION        2
 179
 180 #define HCI_MAX_SHORT_NAME_LENGTH       10
 181
 182 /* Min encryption key size to match with SMP */
 183 #define HCI_MIN_ENC_KEY_SIZE            7
 184
 185 /* Default LE RPA expiry time, 15 minutes */
 186 #define HCI_DEFAULT_RPA_TIMEOUT         (15 * 60)
 187
 188 /* Default min/max age of connection information (1s/3s) */
 189 #define DEFAULT_CONN_INFO_MIN_AGE       1000
 190 #define DEFAULT_CONN_INFO_MAX_AGE       3000
 191
 192 struct amp_assoc {
 193         __u16   len;
 194         __u16   offset;
 195         __u16   rem_len;
 196         __u16   len_so_far;
 197         __u8    data[HCI_MAX_AMP_ASSOC_SIZE];
 198 };
 199
 200 #define HCI_MAX_PAGES   3
 201
 202 struct hci_dev {
 203         struct list_head list;
 204         struct mutex    lock;
 205
 206         char            name[8];
 207         unsigned long   flags;
 208         __u16           id;
 209         __u8            bus;
 210         __u8            dev_type;
 211         bdaddr_t        bdaddr;
 212         bdaddr_t        setup_addr;
 213         bdaddr_t        public_addr;
 214         bdaddr_t        random_addr;
 215         bdaddr_t        static_addr;
 216         __u8            adv_addr_type;
 217         __u8            dev_name[HCI_MAX_NAME_LENGTH];
 218         __u8            short_name[HCI_MAX_SHORT_NAME_LENGTH];
 219         __u8            eir[HCI_MAX_EIR_LENGTH];
 220         __u16           appearance;
 221         __u8            dev_class[3];
 222         __u8            major_class;
 223         __u8            minor_class;
 224         __u8            max_page;
 225         __u8            features[HCI_MAX_PAGES][8];
 226         __u8            le_features[8];
 227         __u8            le_white_list_size;
 228         __u8            le_states[8];
 229         __u8            commands[64];
 230         __u8            hci_ver;
 231         __u16           hci_rev;
 232         __u8            lmp_ver;
 233         __u16           manufacturer;
 234         __u16           lmp_subver;
 235         __u16           voice_setting;
 236         __u8            num_iac;
 237         __u8            stored_max_keys;
 238         __u8            stored_num_keys;
 239         __u8            io_capability;
 240         __s8            inq_tx_power;
 241         __u16           page_scan_interval;
 242         __u16           page_scan_window;
 243         __u8            page_scan_type;
 244         __u8            le_adv_channel_map;
 245         __u16           le_adv_min_interval;
 246         __u16           le_adv_max_interval;
 247         __u8            le_scan_type;
 248         __u16           le_scan_interval;
 249         __u16           le_scan_window;
 250         __u16           le_conn_min_interval;
 251         __u16           le_conn_max_interval;
 252         __u16           le_conn_latency;
 253         __u16           le_supv_timeout;
 254         __u16           le_def_tx_len;
 255         __u16           le_def_tx_time;
 256         __u16           le_max_tx_len;
 257         __u16           le_max_tx_time;
 258         __u16           le_max_rx_len;
 259         __u16           le_max_rx_time;
 260         __u16           discov_interleaved_timeout;
 261         __u16           conn_info_min_age;
 262         __u16           conn_info_max_age;
 263         __u8            ssp_debug_mode;
 264         __u8            hw_error_code;
 265         __u32           clock;
 266
 267         __u16           devid_source;
 268         __u16           devid_vendor;
 269         __u16           devid_product;
 270         __u16           devid_version;
 271
 272         __u16           pkt_type;
 273         __u16           esco_type;
 274         __u16           link_policy;
 275         __u16           link_mode;
 276
 277         __u32           idle_timeout;
 278         __u16           sniff_min_interval;
 279         __u16           sniff_max_interval;
 280
 281         __u8            amp_status;
 282         __u32           amp_total_bw;
 283         __u32           amp_max_bw;
 284         __u32           amp_min_latency;
 285         __u32           amp_max_pdu;
 286         __u8            amp_type;
 287         __u16           amp_pal_cap;
 288         __u16           amp_assoc_size;
 289         __u32           amp_max_flush_to;
 290         __u32           amp_be_flush_to;
 291
 292         struct amp_assoc        loc_assoc;
 293
 294         __u8            flow_ctl_mode;
 295
 296         unsigned int    auto_accept_delay;
 297
 298         unsigned long   quirks;
 299
 300         atomic_t        cmd_cnt;
 301         unsigned int    acl_cnt;
 302         unsigned int    sco_cnt;
 303         unsigned int    le_cnt;
 304
 305         unsigned int    acl_mtu;
 306         unsigned int    sco_mtu;
 307         unsigned int    le_mtu;
 308         unsigned int    acl_pkts;
 309         unsigned int    sco_pkts;
 310         unsigned int    le_pkts;
 311
 312         __u16           block_len;
 313         __u16           block_mtu;
 314         __u16           num_blocks;
 315         __u16           block_cnt;
 316
 317         unsigned long   acl_last_tx;
 318         unsigned long   sco_last_tx;
 319         unsigned long   le_last_tx;
 320
 321         struct workqueue_struct *workqueue;
 322         struct workqueue_struct *req_workqueue;
 323
 324         struct work_struct      power_on;
 325         struct delayed_work     power_off;
 326         struct work_struct      error_reset;
 327
 328         __u16                   discov_timeout;
 329         struct delayed_work     discov_off;
 330
 331         struct delayed_work     service_cache;
 332
 333         struct delayed_work     cmd_timer;
 334
 335         struct work_struct      rx_work;
 336         struct work_struct      cmd_work;
 337         struct work_struct      tx_work;
 338
 339         struct work_struct      discov_update;
 340         struct work_struct      bg_scan_update;
 341         struct work_struct      scan_update;
 342         struct work_struct      connectable_update;
 343         struct work_struct      discoverable_update;
 344         struct delayed_work     le_scan_disable;
 345         struct delayed_work     le_scan_restart;
 346
 347         struct sk_buff_head     rx_q;
 348         struct sk_buff_head     raw_q;
 349         struct sk_buff_head     cmd_q;
 350
 351         struct sk_buff          *sent_cmd;
 352
 353         struct mutex            req_lock;
 354         wait_queue_head_t       req_wait_q;
 355         __u32                   req_status;
 356         __u32                   req_result;
 357         struct sk_buff          *req_skb;
 358
 359         void                    *smp_data;
 360         void                    *smp_bredr_data;
 361
 362         struct discovery_state  discovery;
 363         struct hci_conn_hash    conn_hash;
 364
 365         struct list_head        mgmt_pending;
 366         struct list_head        blacklist;
 367         struct list_head        whitelist;
 368         struct list_head        uuids;
 369         struct list_head        link_keys;
 370         struct list_head        long_term_keys;
 371         struct list_head        identity_resolving_keys;
 372         struct list_head        remote_oob_data;
 373         struct list_head        le_white_list;
 374         struct list_head        le_conn_params;
 375         struct list_head        pend_le_conns;
 376         struct list_head        pend_le_reports;
 377
 378         struct hci_dev_stats    stat;
 379
 380         atomic_t                promisc;
 381
 382         const char              *hw_info;
 383         const char              *fw_info;
 384         struct dentry           *debugfs;
 385
 386         struct device           dev;
 387
 388         struct rfkill           *rfkill;
 389
 390         DECLARE_BITMAP(dev_flags, __HCI_NUM_FLAGS);
 391
 392         __s8                    adv_tx_power;
 393         __u8                    adv_data[HCI_MAX_AD_LENGTH];
 394         __u8                    adv_data_len;
 395         __u8                    scan_rsp_data[HCI_MAX_AD_LENGTH];
 396         __u8                    scan_rsp_data_len;
 397
 398         struct list_head        adv_instances;
 399         unsigned int            adv_instance_cnt;
 400         __u8                    cur_adv_instance;
 401         __u16                   adv_instance_timeout;
 402         struct delayed_work     adv_instance_expire;
 403
 404         __u8                    irk[16];
 405         __u32                   rpa_timeout;
 406         struct delayed_work     rpa_expired;
 407         bdaddr_t                rpa;
 408
 409 #if IS_ENABLED(CONFIG_BT_LEDS)
 410         struct led_trigger      *power_led;
 411 #endif
 412
 413         int (*open)(struct hci_dev *hdev);
 414         int (*close)(struct hci_dev *hdev);
 415         int (*flush)(struct hci_dev *hdev);
 416         int (*setup)(struct hci_dev *hdev);
 417         int (*shutdown)(struct hci_dev *hdev);
 418         int (*send)(struct hci_dev *hdev, struct sk_buff *skb);
 419         void (*notify)(struct hci_dev *hdev, unsigned int evt);
 420         void (*hw_error)(struct hci_dev *hdev, u8 code);
 421         int (*post_init)(struct hci_dev *hdev);
 422         int (*set_diag)(struct hci_dev *hdev, bool enable);
 423         int (*set_bdaddr)(struct hci_dev *hdev, const bdaddr_t *bdaddr);
 424 };
 425
 426 #define HCI_PHY_HANDLE(handle)  (handle & 0xff)
 427
 428 struct hci_conn {
 429         struct list_head list;
 430
 431         atomic_t        refcnt;
 432
 433         bdaddr_t        dst;
 434         __u8            dst_type;
 435         bdaddr_t        src;
 436         __u8            src_type;
 437         bdaddr_t        init_addr;
 438         __u8            init_addr_type;
 439         bdaddr_t        resp_addr;
 440         __u8            resp_addr_type;
 441         __u16           handle;
 442         __u16           state;
 443         __u8            mode;
 444         __u8            type;
 445         __u8            role;
 446         bool            out;
 447         __u8            attempt;
 448         __u8            dev_class[3];
 449         __u8            features[HCI_MAX_PAGES][8];
 450         __u16           pkt_type;
 451         __u16           link_policy;
 452         __u8            key_type;
 453         __u8            auth_type;
 454         __u8            sec_level;
 455         __u8            pending_sec_level;
 456         __u8            pin_length;
 457         __u8            enc_key_size;
 458         __u8            io_capability;
 459         __u32           passkey_notify;
 460         __u8            passkey_entered;
 461         __u16           disc_timeout;
 462         __u16           conn_timeout;
 463         __u16           setting;
 464         __u16           le_conn_min_interval;
 465         __u16           le_conn_max_interval;
 466         __u16           le_conn_interval;
 467         __u16           le_conn_latency;
 468         __u16           le_supv_timeout;
 469         __u8            le_adv_data[HCI_MAX_AD_LENGTH];
 470         __u8            le_adv_data_len;
 471         __s8            rssi;
 472         __s8            tx_power;
 473         __s8            max_tx_power;
 474         unsigned long   flags;
 475
 476         __u32           clock;
 477         __u16           clock_accuracy;
 478
 479         unsigned long   conn_info_timestamp;
 480
 481         __u8            remote_cap;
 482         __u8            remote_auth;
 483         __u8            remote_id;
 484
 485         unsigned int    sent;
 486
 487         struct sk_buff_head data_q;
 488         struct list_head chan_list;
 489
 490         struct delayed_work disc_work;
 491         struct delayed_work auto_accept_work;
 492         struct delayed_work idle_work;
 493         struct delayed_work le_conn_timeout;
 494         struct work_struct  le_scan_cleanup;
 495
 496         struct device   dev;
 497         struct dentry   *debugfs;
 498
 499         struct hci_dev  *hdev;
 500         void            *l2cap_data;
 501         void            *sco_data;
 502         struct amp_mgr  *amp_mgr;
 503
 504         struct hci_conn *link;
 505
 506         void (*connect_cfm_cb)  (struct hci_conn *conn, u8 status);
 507         void (*security_cfm_cb) (struct hci_conn *conn, u8 status);
 508         void (*disconn_cfm_cb)  (struct hci_conn *conn, u8 reason);
 509 };
 510
 511 struct hci_chan {
 512         struct list_head list;
 513         __u16 handle;
 514         struct hci_conn *conn;
 515         struct sk_buff_head data_q;
 516         unsigned int    sent;
 517         __u8            state;
 518         bool            amp;
 519 };
 520
 521 struct hci_conn_params {
 522         struct list_head list;
 523         struct list_head action;
 524
 525         bdaddr_t addr;
 526         u8 addr_type;
 527
 528         u16 conn_min_interval;
 529         u16 conn_max_interval;
 530         u16 conn_latency;
 531         u16 supervision_timeout;
 532
 533         enum {
 534                 HCI_AUTO_CONN_DISABLED,
 535                 HCI_AUTO_CONN_REPORT,
 536                 HCI_AUTO_CONN_DIRECT,
 537                 HCI_AUTO_CONN_ALWAYS,
 538                 HCI_AUTO_CONN_LINK_LOSS,
 539                 HCI_AUTO_CONN_EXPLICIT,
 540         } auto_connect;
 541
 542         struct hci_conn *conn;
 543         bool explicit_connect;
 544 };
 545
 546 extern struct list_head hci_dev_list;
 547 extern struct list_head hci_cb_list;
 548 extern rwlock_t hci_dev_list_lock;
 549 extern struct mutex hci_cb_list_lock;
 550
 551 #define hci_dev_set_flag(hdev, nr)             set_bit((nr), (hdev)->dev_flags)
 552 #define hci_dev_clear_flag(hdev, nr)           clear_bit((nr), (hdev)->dev_flags)
 553 #define hci_dev_change_flag(hdev, nr)          change_bit((nr), (hdev)->dev_flags)
 554 #define hci_dev_test_flag(hdev, nr)            test_bit((nr), (hdev)->dev_flags)
 555 #define hci_dev_test_and_set_flag(hdev, nr)    test_and_set_bit((nr), (hdev)->dev_flags)
 556 #define hci_dev_test_and_clear_flag(hdev, nr)  test_and_clear_bit((nr), (hdev)->dev_flags)
 557 #define hci_dev_test_and_change_flag(hdev, nr) test_and_change_bit((nr), (hdev)->dev_flags)
 558
 559 #define hci_dev_clear_volatile_flags(hdev)                      \
 560         do {                                                    \
 561                 hci_dev_clear_flag(hdev, HCI_LE_SCAN);          \
 562                 hci_dev_clear_flag(hdev, HCI_LE_ADV);           \
 563                 hci_dev_clear_flag(hdev, HCI_PERIODIC_INQ);     \
 564         } while (0)
 565
 566 /* ----- HCI interface to upper protocols ----- */
 567 int l2cap_connect_ind(struct hci_dev *hdev, bdaddr_t *bdaddr);
 568 int l2cap_disconn_ind(struct hci_conn *hcon);
 569 void l2cap_recv_acldata(struct hci_conn *hcon, struct sk_buff *skb, u16 flags);
 570
 571 #if IS_ENABLED(CONFIG_BT_BREDR)
 572 int sco_connect_ind(struct hci_dev *hdev, bdaddr_t *bdaddr, __u8 *flags);
 573 void sco_recv_scodata(struct hci_conn *hcon, struct sk_buff *skb);
 574 #else
 575 static inline int sco_connect_ind(struct hci_dev *hdev, bdaddr_t *bdaddr,
 576                                   __u8 *flags)
 577 {
 578         return 0;
 579 }
 580
 581 static inline void sco_recv_scodata(struct hci_conn *hcon, struct sk_buff *skb)
 582 {
 583 }
 584 #endif
 585
 586 /* ----- Inquiry cache ----- */
 587 #define INQUIRY_CACHE_AGE_MAX   (HZ*30)   /* 30 seconds */
 588 #define INQUIRY_ENTRY_AGE_MAX   (HZ*60)   /* 60 seconds */
 589
 590 static inline void discovery_init(struct hci_dev *hdev)
 591 {
 592         hdev->discovery.state = DISCOVERY_STOPPED;
 593         INIT_LIST_HEAD(&hdev->discovery.all);
 594         INIT_LIST_HEAD(&hdev->discovery.unknown);
 595         INIT_LIST_HEAD(&hdev->discovery.resolve);
 596         hdev->discovery.report_invalid_rssi = true;
 597         hdev->discovery.rssi = HCI_RSSI_INVALID;
 598 }
 599
 600 static inline void hci_discovery_filter_clear(struct hci_dev *hdev)
 601 {
 602         hdev->discovery.result_filtering = false;
 603         hdev->discovery.report_invalid_rssi = true;
 604         hdev->discovery.rssi = HCI_RSSI_INVALID;
 605         hdev->discovery.uuid_count = 0;
 606         kfree(hdev->discovery.uuids);
 607         hdev->discovery.uuids = NULL;
 608         hdev->discovery.scan_start = 0;
 609         hdev->discovery.scan_duration = 0;
 610 }
 611
 612 bool hci_discovery_active(struct hci_dev *hdev);
 613
 614 void hci_discovery_set_state(struct hci_dev *hdev, int state);
 615
 616 static inline int inquiry_cache_empty(struct hci_dev *hdev)
 617 {
 618         return list_empty(&hdev->discovery.all);
 619 }
 620
 621 static inline long inquiry_cache_age(struct hci_dev *hdev)
 622 {
 623         struct discovery_state *c = &hdev->discovery;
 624         return jiffies - c->timestamp;
 625 }
 626
 627 static inline long inquiry_entry_age(struct inquiry_entry *e)
 628 {
 629         return jiffies - e->timestamp;
 630 }
 631
 632 struct inquiry_entry *hci_inquiry_cache_lookup(struct hci_dev *hdev,
 633                                                bdaddr_t *bdaddr);
 634 struct inquiry_entry *hci_inquiry_cache_lookup_unknown(struct hci_dev *hdev,
 635                                                        bdaddr_t *bdaddr);
 636 struct inquiry_entry *hci_inquiry_cache_lookup_resolve(struct hci_dev *hdev,
 637                                                        bdaddr_t *bdaddr,
 638                                                        int state);
 639 void hci_inquiry_cache_update_resolve(struct hci_dev *hdev,
 640                                       struct inquiry_entry *ie);
 641 u32 hci_inquiry_cache_update(struct hci_dev *hdev, struct inquiry_data *data,
 642                              bool name_known);
 643 void hci_inquiry_cache_flush(struct hci_dev *hdev);
 644
 645 /* ----- HCI Connections ----- */
 646 enum {
 647         HCI_CONN_AUTH_PEND,
 648         HCI_CONN_REAUTH_PEND,
 649         HCI_CONN_ENCRYPT_PEND,
 650         HCI_CONN_RSWITCH_PEND,
 651         HCI_CONN_MODE_CHANGE_PEND,
 652         HCI_CONN_SCO_SETUP_PEND,
 653         HCI_CONN_MGMT_CONNECTED,
 654         HCI_CONN_SSP_ENABLED,
 655         HCI_CONN_SC_ENABLED,
 656         HCI_CONN_AES_CCM,
 657         HCI_CONN_POWER_SAVE,
 658         HCI_CONN_FLUSH_KEY,
 659         HCI_CONN_ENCRYPT,
 660         HCI_CONN_AUTH,
 661         HCI_CONN_SECURE,
 662         HCI_CONN_FIPS,
 663         HCI_CONN_STK_ENCRYPT,
 664         HCI_CONN_AUTH_INITIATOR,
 665         HCI_CONN_DROP,
 666         HCI_CONN_PARAM_REMOVAL_PEND,
 667         HCI_CONN_NEW_LINK_KEY,
 668         HCI_CONN_SCANNING,
 669         HCI_CONN_AUTH_FAILURE,
 670 };
 671
 672 static inline bool hci_conn_ssp_enabled(struct hci_conn *conn)
 673 {
 674         struct hci_dev *hdev = conn->hdev;
 675         return hci_dev_test_flag(hdev, HCI_SSP_ENABLED) &&
 676                test_bit(HCI_CONN_SSP_ENABLED, &conn->flags);
 677 }
 678
 679 static inline bool hci_conn_sc_enabled(struct hci_conn *conn)
 680 {
 681         struct hci_dev *hdev = conn->hdev;
 682         return hci_dev_test_flag(hdev, HCI_SC_ENABLED) &&
 683                test_bit(HCI_CONN_SC_ENABLED, &conn->flags);
 684 }
 685
 686 static inline void hci_conn_hash_add(struct hci_dev *hdev, struct hci_conn *c)
 687 {
 688         struct hci_conn_hash *h = &hdev->conn_hash;
 689         list_add_rcu(&c->list, &h->list);
 690         switch (c->type) {
 691         case ACL_LINK:
 692                 h->acl_num++;
 693                 break;
 694         case AMP_LINK:
 695                 h->amp_num++;
 696                 break;
 697         case LE_LINK:
 698                 h->le_num++;
 699                 if (c->role == HCI_ROLE_SLAVE)
 700                         h->le_num_slave++;
 701                 break;
 702         case SCO_LINK:
 703         case ESCO_LINK:
 704                 h->sco_num++;
 705                 break;
 706         }
 707 }
 708
 709 static inline void hci_conn_hash_del(struct hci_dev *hdev, struct hci_conn *c)
 710 {
 711         struct hci_conn_hash *h = &hdev->conn_hash;
 712
 713         list_del_rcu(&c->list);
 714         synchronize_rcu();
 715
 716         switch (c->type) {
 717         case ACL_LINK:
 718                 h->acl_num--;
 719                 break;
 720         case AMP_LINK:
 721                 h->amp_num--;
 722                 break;
 723         case LE_LINK:
 724                 h->le_num--;
 725                 if (c->role == HCI_ROLE_SLAVE)
 726                         h->le_num_slave--;
 727                 break;
 728         case SCO_LINK:
 729         case ESCO_LINK:
 730                 h->sco_num--;
 731                 break;
 732         }
 733 }
 734
 735 static inline unsigned int hci_conn_num(struct hci_dev *hdev, __u8 type)
 736 {
 737         struct hci_conn_hash *h = &hdev->conn_hash;
 738         switch (type) {
 739         case ACL_LINK:
 740                 return h->acl_num;
 741         case AMP_LINK:
 742                 return h->amp_num;
 743         case LE_LINK:
 744                 return h->le_num;
 745         case SCO_LINK:
 746         case ESCO_LINK:
 747                 return h->sco_num;
 748         default:
 749                 return 0;
 750         }
 751 }
 752
 753 static inline unsigned int hci_conn_count(struct hci_dev *hdev)
 754 {
 755         struct hci_conn_hash *c = &hdev->conn_hash;
 756
 757         return c->acl_num + c->amp_num + c->sco_num + c->le_num;
 758 }
 759
 760 static inline __u8 hci_conn_lookup_type(struct hci_dev *hdev, __u16 handle)
 761 {
 762         struct hci_conn_hash *h = &hdev->conn_hash;
 763         struct hci_conn *c;
 764         __u8 type = INVALID_LINK;
 765
 766         rcu_read_lock();
 767
 768         list_for_each_entry_rcu(c, &h->list, list) {
 769                 if (c->handle == handle) {
 770                         type = c->type;
 771                         break;
 772                 }
 773         }
 774
 775         rcu_read_unlock();
 776
 777         return type;
 778 }
 779
 780 static inline struct hci_conn *hci_conn_hash_lookup_handle(struct hci_dev *hdev,
 781                                                                 __u16 handle)
 782 {
 783         struct hci_conn_hash *h = &hdev->conn_hash;
 784         struct hci_conn  *c;
 785
 786         rcu_read_lock();
 787
 788         list_for_each_entry_rcu(c, &h->list, list) {
 789                 if (c->handle == handle) {
 790                         rcu_read_unlock();
 791                         return c;
 792                 }
 793         }
 794         rcu_read_unlock();
 795
 796         return NULL;
 797 }
 798
 799 static inline struct hci_conn *hci_conn_hash_lookup_ba(struct hci_dev *hdev,
 800                                                         __u8 type, bdaddr_t *ba)
 801 {
 802         struct hci_conn_hash *h = &hdev->conn_hash;
 803         struct hci_conn  *c;
 804
 805         rcu_read_lock();
 806
 807         list_for_each_entry_rcu(c, &h->list, list) {
 808                 if (c->type == type && !bacmp(&c->dst, ba)) {
 809                         rcu_read_unlock();
 810                         return c;
 811                 }
 812         }
 813
 814         rcu_read_unlock();
 815
 816         return NULL;
 817 }
 818
 819 static inline struct hci_conn *hci_conn_hash_lookup_le(struct hci_dev *hdev,
 820                                                        bdaddr_t *ba,
 821                                                        __u8 ba_type)
 822 {
 823         struct hci_conn_hash *h = &hdev->conn_hash;
 824         struct hci_conn  *c;
 825
 826         rcu_read_lock();
 827
 828         list_for_each_entry_rcu(c, &h->list, list) {
 829                 if (c->type != LE_LINK)
 830                        continue;
 831
 832                 if (ba_type == c->dst_type && !bacmp(&c->dst, ba)) {
 833                         rcu_read_unlock();
 834                         return c;
 835                 }
 836         }
 837
 838         rcu_read_unlock();
 839
 840         return NULL;
 841 }
 842
 843 static inline struct hci_conn *hci_conn_hash_lookup_state(struct hci_dev *hdev,
 844                                                         __u8 type, __u16 state)
 845 {
 846         struct hci_conn_hash *h = &hdev->conn_hash;
 847         struct hci_conn  *c;
 848
 849         rcu_read_lock();
 850
 851         list_for_each_entry_rcu(c, &h->list, list) {
 852                 if (c->type == type && c->state == state) {
 853                         rcu_read_unlock();
 854                         return c;
 855                 }
 856         }
 857
 858         rcu_read_unlock();
 859
 860         return NULL;
 861 }
 862
 863 static inline struct hci_conn *hci_lookup_le_connect(struct hci_dev *hdev)
 864 {
 865         struct hci_conn_hash *h = &hdev->conn_hash;
 866         struct hci_conn  *c;
 867
 868         rcu_read_lock();
 869
 870         list_for_each_entry_rcu(c, &h->list, list) {
 871                 if (c->type == LE_LINK && c->state == BT_CONNECT &&
 872                     !test_bit(HCI_CONN_SCANNING, &c->flags)) {
 873                         rcu_read_unlock();
 874                         return c;
 875                 }
 876         }
 877
 878         rcu_read_unlock();
 879
 880         return NULL;
 881 }
 882
 883 int hci_disconnect(struct hci_conn *conn, __u8 reason);
 884 bool hci_setup_sync(struct hci_conn *conn, __u16 handle);
 885 void hci_sco_setup(struct hci_conn *conn, __u8 status);
 886
 887 struct hci_conn *hci_conn_add(struct hci_dev *hdev, int type, bdaddr_t *dst,
 888                               u8 role);
 889 int hci_conn_del(struct hci_conn *conn);
 890 void hci_conn_hash_flush(struct hci_dev *hdev);
 891 void hci_conn_check_pending(struct hci_dev *hdev);
 892
 893 struct hci_chan *hci_chan_create(struct hci_conn *conn);
 894 void hci_chan_del(struct hci_chan *chan);
 895 void hci_chan_list_flush(struct hci_conn *conn);
 896 struct hci_chan *hci_chan_lookup_handle(struct hci_dev *hdev, __u16 handle);
 897
 898 struct hci_conn *hci_connect_le_scan(struct hci_dev *hdev, bdaddr_t *dst,
 899                                      u8 dst_type, u8 sec_level,
 900                                      u16 conn_timeout);
 901 struct hci_conn *hci_connect_le(struct hci_dev *hdev, bdaddr_t *dst,
 902                                 u8 dst_type, u8 sec_level, u16 conn_timeout,
 903                                 u8 role, bdaddr_t *direct_rpa);
 904 struct hci_conn *hci_connect_acl(struct hci_dev *hdev, bdaddr_t *dst,
 905                                  u8 sec_level, u8 auth_type);
 906 struct hci_conn *hci_connect_sco(struct hci_dev *hdev, int type, bdaddr_t *dst,
 907                                  __u16 setting);
 908 int hci_conn_check_link_mode(struct hci_conn *conn);
 909 int hci_conn_check_secure(struct hci_conn *conn, __u8 sec_level);
 910 int hci_conn_security(struct hci_conn *conn, __u8 sec_level, __u8 auth_type,
 911                       bool initiator);
 912 int hci_conn_switch_role(struct hci_conn *conn, __u8 role);
 913
 914 void hci_conn_enter_active_mode(struct hci_conn *conn, __u8 force_active);
 915
 916 void hci_le_conn_failed(struct hci_conn *conn, u8 status);
 917
 918 /*
 919  * hci_conn_get() and hci_conn_put() are used to control the life-time of an
 920  * "hci_conn" object. They do not guarantee that the hci_conn object is running,
 921  * working or anything else. They just guarantee that the object is available
 922  * and can be dereferenced. So you can use its locks, local variables and any
 923  * other constant data.
 924  * Before accessing runtime data, you _must_ lock the object and then check that
 925  * it is still running. As soon as you release the locks, the connection might
 926  * get dropped, though.
 927  *
 928  * On the other hand, hci_conn_hold() and hci_conn_drop() are used to control
 929  * how long the underlying connection is held. So every channel that runs on the
 930  * hci_conn object calls this to prevent the connection from disappearing. As
 931  * long as you hold a device, you must also guarantee that you have a valid
 932  * reference to the device via hci_conn_get() (or the initial reference from
 933  * hci_conn_add()).
 934  * The hold()/drop() ref-count is known to drop below 0 sometimes, which doesn't
 935  * break because nobody cares for that. But this means, we cannot use
 936  * _get()/_drop() in it, but require the caller to have a valid ref (FIXME).
 937  */
 938
 939 static inline struct hci_conn *hci_conn_get(struct hci_conn *conn)
 940 {
 941         get_device(&conn->dev);
 942         return conn;
 943 }
 944
 945 static inline void hci_conn_put(struct hci_conn *conn)
 946 {
 947         put_device(&conn->dev);
 948 }
 949
 950 static inline void hci_conn_hold(struct hci_conn *conn)
 951 {
 952         BT_DBG("hcon %p orig refcnt %d", conn, atomic_read(&conn->refcnt));
 953
 954         atomic_inc(&conn->refcnt);
 955         cancel_delayed_work(&conn->disc_work);
 956 }
 957
 958 static inline void hci_conn_drop(struct hci_conn *conn)
 959 {
 960         BT_DBG("hcon %p orig refcnt %d", conn, atomic_read(&conn->refcnt));
 961
 962         if (atomic_dec_and_test(&conn->refcnt)) {
 963                 unsigned long timeo;
 964
 965                 switch (conn->type) {
 966                 case ACL_LINK:
 967                 case LE_LINK:
 968                         cancel_delayed_work(&conn->idle_work);
 969                         if (conn->state == BT_CONNECTED) {
 970                                 timeo = conn->disc_timeout;
 971                                 if (!conn->out)
 972                                         timeo *= 2;
 973                         } else {
 974                                 timeo = 0;
 975                         }
 976                         break;
 977
 978                 case AMP_LINK:
 979                         timeo = conn->disc_timeout;
 980                         break;
 981
 982                 default:
 983                         timeo = 0;
 984                         break;
 985                 }
 986
 987                 cancel_delayed_work(&conn->disc_work);
 988                 queue_delayed_work(conn->hdev->workqueue,
 989                                    &conn->disc_work, timeo);
 990         }
 991 }
 992
 993 /* ----- HCI Devices ----- */
 994 static inline void hci_dev_put(struct hci_dev *d)
 995 {
 996         BT_DBG("%s orig refcnt %d", d->name,
 997                atomic_read(&d->dev.kobj.kref.refcount));
 998
 999         put_device(&d->dev);
1000 }
1001
1002 static inline struct hci_dev *hci_dev_hold(struct hci_dev *d)
1003 {
1004         BT_DBG("%s orig refcnt %d", d->name,
1005                atomic_read(&d->dev.kobj.kref.refcount));
1006
1007         get_device(&d->dev);
1008         return d;
1009 }
1010
1011 #define hci_dev_lock(d)         mutex_lock(&d->lock)
1012 #define hci_dev_unlock(d)       mutex_unlock(&d->lock)
1013
1014 #define to_hci_dev(d) container_of(d, struct hci_dev, dev)
1015 #define to_hci_conn(c) container_of(c, struct hci_conn, dev)
1016
1017 static inline void *hci_get_drvdata(struct hci_dev *hdev)
1018 {
1019         return dev_get_drvdata(&hdev->dev);
1020 }
1021
1022 static inline void hci_set_drvdata(struct hci_dev *hdev, void *data)
1023 {
1024         dev_set_drvdata(&hdev->dev, data);
1025 }
1026
1027 struct hci_dev *hci_dev_get(int index);
1028 struct hci_dev *hci_get_route(bdaddr_t *dst, bdaddr_t *src, u8 src_type);
1029
1030 struct hci_dev *hci_alloc_dev(void);
1031 void hci_free_dev(struct hci_dev *hdev);
1032 int hci_register_dev(struct hci_dev *hdev);
1033 void hci_unregister_dev(struct hci_dev *hdev);
1034 void hci_cleanup_dev(struct hci_dev *hdev);
1035 int hci_suspend_dev(struct hci_dev *hdev);
1036 int hci_resume_dev(struct hci_dev *hdev);
1037 int hci_reset_dev(struct hci_dev *hdev);
1038 int hci_recv_frame(struct hci_dev *hdev, struct sk_buff *skb);
1039 int hci_recv_diag(struct hci_dev *hdev, struct sk_buff *skb);
1040 __printf(2, 3) void hci_set_hw_info(struct hci_dev *hdev, const char *fmt, ...);
1041 __printf(2, 3) void hci_set_fw_info(struct hci_dev *hdev, const char *fmt, ...);
1042 int hci_dev_open(__u16 dev);
1043 int hci_dev_close(__u16 dev);
1044 int hci_dev_do_close(struct hci_dev *hdev);
1045 int hci_dev_reset(__u16 dev);
1046 int hci_dev_reset_stat(__u16 dev);
1047 int hci_dev_cmd(unsigned int cmd, void __user *arg);
1048 int hci_get_dev_list(void __user *arg);
1049 int hci_get_dev_info(void __user *arg);
1050 int hci_get_conn_list(void __user *arg);
1051 int hci_get_conn_info(struct hci_dev *hdev, void __user *arg);
1052 int hci_get_auth_info(struct hci_dev *hdev, void __user *arg);
1053 int hci_inquiry(void __user *arg);
1054
1055 struct bdaddr_list *hci_bdaddr_list_lookup(struct list_head *list,
1056                                            bdaddr_t *bdaddr, u8 type);
1057 int hci_bdaddr_list_add(struct list_head *list, bdaddr_t *bdaddr, u8 type);
1058 int hci_bdaddr_list_del(struct list_head *list, bdaddr_t *bdaddr, u8 type);
1059 void hci_bdaddr_list_clear(struct list_head *list);
1060
1061 struct hci_conn_params *hci_conn_params_lookup(struct hci_dev *hdev,
1062                                                bdaddr_t *addr, u8 addr_type);
1063 struct hci_conn_params *hci_conn_params_add(struct hci_dev *hdev,
1064                                             bdaddr_t *addr, u8 addr_type);
1065 void hci_conn_params_del(struct hci_dev *hdev, bdaddr_t *addr, u8 addr_type);
1066 void hci_conn_params_clear_disabled(struct hci_dev *hdev);
1067
1068 struct hci_conn_params *hci_pend_le_action_lookup(struct list_head *list,
1069                                                   bdaddr_t *addr,
1070                                                   u8 addr_type);
1071
1072 void hci_uuids_clear(struct hci_dev *hdev);
1073
1074 void hci_link_keys_clear(struct hci_dev *hdev);
1075 struct link_key *hci_find_link_key(struct hci_dev *hdev, bdaddr_t *bdaddr);
1076 struct link_key *hci_add_link_key(struct hci_dev *hdev, struct hci_conn *conn,
1077                                   bdaddr_t *bdaddr, u8 *val, u8 type,
1078                                   u8 pin_len, bool *persistent);
1079 struct smp_ltk *hci_add_ltk(struct hci_dev *hdev, bdaddr_t *bdaddr,
1080                             u8 addr_type, u8 type, u8 authenticated,
1081                             u8 tk[16], u8 enc_size, __le16 ediv, __le64 rand);
1082 struct smp_ltk *hci_find_ltk(struct hci_dev *hdev, bdaddr_t *bdaddr,
1083                              u8 addr_type, u8 role);
1084 int hci_remove_ltk(struct hci_dev *hdev, bdaddr_t *bdaddr, u8 bdaddr_type);
1085 void hci_smp_ltks_clear(struct hci_dev *hdev);
1086 int hci_remove_link_key(struct hci_dev *hdev, bdaddr_t *bdaddr);
1087
1088 struct smp_irk *hci_find_irk_by_rpa(struct hci_dev *hdev, bdaddr_t *rpa);
1089 struct smp_irk *hci_find_irk_by_addr(struct hci_dev *hdev, bdaddr_t *bdaddr,
1090                                      u8 addr_type);
1091 struct smp_irk *hci_add_irk(struct hci_dev *hdev, bdaddr_t *bdaddr,
1092                             u8 addr_type, u8 val[16], bdaddr_t *rpa);
1093 void hci_remove_irk(struct hci_dev *hdev, bdaddr_t *bdaddr, u8 addr_type);
1094 void hci_smp_irks_clear(struct hci_dev *hdev);
1095
1096 bool hci_bdaddr_is_paired(struct hci_dev *hdev, bdaddr_t *bdaddr, u8 type);
1097
1098 void hci_remote_oob_data_clear(struct hci_dev *hdev);
1099 struct oob_data *hci_find_remote_oob_data(struct hci_dev *hdev,
1100                                           bdaddr_t *bdaddr, u8 bdaddr_type);
1101 int hci_add_remote_oob_data(struct hci_dev *hdev, bdaddr_t *bdaddr,
1102                             u8 bdaddr_type, u8 *hash192, u8 *rand192,
1103                             u8 *hash256, u8 *rand256);
1104 int hci_remove_remote_oob_data(struct hci_dev *hdev, bdaddr_t *bdaddr,
1105                                u8 bdaddr_type);
1106
1107 void hci_adv_instances_clear(struct hci_dev *hdev);
1108 struct adv_info *hci_find_adv_instance(struct hci_dev *hdev, u8 instance);
1109 struct adv_info *hci_get_next_instance(struct hci_dev *hdev, u8 instance);
1110 int hci_add_adv_instance(struct hci_dev *hdev, u8 instance, u32 flags,
1111                          u16 adv_data_len, u8 *adv_data,
1112                          u16 scan_rsp_len, u8 *scan_rsp_data,
1113                          u16 timeout, u16 duration);
1114 int hci_remove_adv_instance(struct hci_dev *hdev, u8 instance);
1115
1116 void hci_event_packet(struct hci_dev *hdev, struct sk_buff *skb);
1117
1118 void hci_init_sysfs(struct hci_dev *hdev);
1119 void hci_conn_init_sysfs(struct hci_conn *conn);
1120 void hci_conn_add_sysfs(struct hci_conn *conn);
1121 void hci_conn_del_sysfs(struct hci_conn *conn);
1122
1123 #define SET_HCIDEV_DEV(hdev, pdev) ((hdev)->dev.parent = (pdev))
1124
1125 /* ----- LMP capabilities ----- */
1126 #define lmp_encrypt_capable(dev)   ((dev)->features[0][0] & LMP_ENCRYPT)
1127 #define lmp_rswitch_capable(dev)   ((dev)->features[0][0] & LMP_RSWITCH)
1128 #define lmp_hold_capable(dev)      ((dev)->features[0][0] & LMP_HOLD)
1129 #define lmp_sniff_capable(dev)     ((dev)->features[0][0] & LMP_SNIFF)
1130 #define lmp_park_capable(dev)      ((dev)->features[0][1] & LMP_PARK)
1131 #define lmp_inq_rssi_capable(dev)  ((dev)->features[0][3] & LMP_RSSI_INQ)
1132 #define lmp_esco_capable(dev)      ((dev)->features[0][3] & LMP_ESCO)
1133 #define lmp_bredr_capable(dev)     (!((dev)->features[0][4] & LMP_NO_BREDR))
1134 #define lmp_le_capable(dev)        ((dev)->features[0][4] & LMP_LE)
1135 #define lmp_sniffsubr_capable(dev) ((dev)->features[0][5] & LMP_SNIFF_SUBR)
1136 #define lmp_pause_enc_capable(dev) ((dev)->features[0][5] & LMP_PAUSE_ENC)
1137 #define lmp_ext_inq_capable(dev)   ((dev)->features[0][6] & LMP_EXT_INQ)
1138 #define lmp_le_br_capable(dev)     (!!((dev)->features[0][6] & LMP_SIMUL_LE_BR))
1139 #define lmp_ssp_capable(dev)       ((dev)->features[0][6] & LMP_SIMPLE_PAIR)
1140 #define lmp_no_flush_capable(dev)  ((dev)->features[0][6] & LMP_NO_FLUSH)
1141 #define lmp_lsto_capable(dev)      ((dev)->features[0][7] & LMP_LSTO)
1142 #define lmp_inq_tx_pwr_capable(dev) ((dev)->features[0][7] & LMP_INQ_TX_PWR)
1143 #define lmp_ext_feat_capable(dev)  ((dev)->features[0][7] & LMP_EXTFEATURES)
1144 #define lmp_transp_capable(dev)    ((dev)->features[0][2] & LMP_TRANSPARENT)
1145
1146 /* ----- Extended LMP capabilities ----- */
1147 #define lmp_csb_master_capable(dev) ((dev)->features[2][0] & LMP_CSB_MASTER)
1148 #define lmp_csb_slave_capable(dev)  ((dev)->features[2][0] & LMP_CSB_SLAVE)
1149 #define lmp_sync_train_capable(dev) ((dev)->features[2][0] & LMP_SYNC_TRAIN)
1150 #define lmp_sync_scan_capable(dev)  ((dev)->features[2][0] & LMP_SYNC_SCAN)
1151 #define lmp_sc_capable(dev)         ((dev)->features[2][1] & LMP_SC)
1152 #define lmp_ping_capable(dev)       ((dev)->features[2][1] & LMP_PING)
1153
1154 /* ----- Host capabilities ----- */
1155 #define lmp_host_ssp_capable(dev)  ((dev)->features[1][0] & LMP_HOST_SSP)
1156 #define lmp_host_sc_capable(dev)   ((dev)->features[1][0] & LMP_HOST_SC)
1157 #define lmp_host_le_capable(dev)   (!!((dev)->features[1][0] & LMP_HOST_LE))
1158 #define lmp_host_le_br_capable(dev) (!!((dev)->features[1][0] & LMP_HOST_LE_BREDR))
1159
1160 #define hdev_is_powered(dev)   (test_bit(HCI_UP, &(dev)->flags) && \
1161                                 !hci_dev_test_flag(dev, HCI_AUTO_OFF))
1162 #define bredr_sc_enabled(dev)  (lmp_sc_capable(dev) && \
1163                                 hci_dev_test_flag(dev, HCI_SC_ENABLED))
1164
1165 /* ----- HCI protocols ----- */
1166 #define HCI_PROTO_DEFER             0x01
1167
1168 static inline int hci_proto_connect_ind(struct hci_dev *hdev, bdaddr_t *bdaddr,
1169                                         __u8 type, __u8 *flags)
1170 {
1171         switch (type) {
1172         case ACL_LINK:
1173                 return l2cap_connect_ind(hdev, bdaddr);
1174
1175         case SCO_LINK:
1176         case ESCO_LINK:
1177                 return sco_connect_ind(hdev, bdaddr, flags);
1178
1179         default:
1180                 BT_ERR("unknown link type %d", type);
1181                 return -EINVAL;
1182         }
1183 }
1184
1185 static inline int hci_proto_disconn_ind(struct hci_conn *conn)
1186 {
1187         if (conn->type != ACL_LINK && conn->type != LE_LINK)
1188                 return HCI_ERROR_REMOTE_USER_TERM;
1189
1190         return l2cap_disconn_ind(conn);
1191 }
1192
1193 /* ----- HCI callbacks ----- */
1194 struct hci_cb {
1195         struct list_head list;
1196
1197         char *name;
1198
1199         void (*connect_cfm)     (struct hci_conn *conn, __u8 status);
1200         void (*disconn_cfm)     (struct hci_conn *conn, __u8 status);
1201         void (*security_cfm)    (struct hci_conn *conn, __u8 status,
1202                                                                 __u8 encrypt);
1203         void (*key_change_cfm)  (struct hci_conn *conn, __u8 status);
1204         void (*role_switch_cfm) (struct hci_conn *conn, __u8 status, __u8 role);
1205 };
1206
1207 static inline void hci_connect_cfm(struct hci_conn *conn, __u8 status)
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->connect_cfm)
1214                         cb->connect_cfm(conn, status);
1215         }
1216         mutex_unlock(&hci_cb_list_lock);
1217
1218         if (conn->connect_cfm_cb)
1219                 conn->connect_cfm_cb(conn, status);
1220 }
1221
1222 static inline void hci_disconn_cfm(struct hci_conn *conn, __u8 reason)
1223 {
1224         struct hci_cb *cb;
1225
1226         mutex_lock(&hci_cb_list_lock);
1227         list_for_each_entry(cb, &hci_cb_list, list) {
1228                 if (cb->disconn_cfm)
1229                         cb->disconn_cfm(conn, reason);
1230         }
1231         mutex_unlock(&hci_cb_list_lock);
1232
1233         if (conn->disconn_cfm_cb)
1234                 conn->disconn_cfm_cb(conn, reason);
1235 }
1236
1237 static inline void hci_auth_cfm(struct hci_conn *conn, __u8 status)
1238 {
1239         struct hci_cb *cb;
1240         __u8 encrypt;
1241
1242         if (test_bit(HCI_CONN_ENCRYPT_PEND, &conn->flags))
1243                 return;
1244
1245         encrypt = test_bit(HCI_CONN_ENCRYPT, &conn->flags) ? 0x01 : 0x00;
1246
1247         mutex_lock(&hci_cb_list_lock);
1248         list_for_each_entry(cb, &hci_cb_list, list) {
1249                 if (cb->security_cfm)
1250                         cb->security_cfm(conn, status, encrypt);
1251         }
1252         mutex_unlock(&hci_cb_list_lock);
1253
1254         if (conn->security_cfm_cb)
1255                 conn->security_cfm_cb(conn, status);
1256 }
1257
1258 static inline void hci_encrypt_cfm(struct hci_conn *conn, __u8 status)
1259 {
1260         struct hci_cb *cb;
1261         __u8 encrypt;
1262
1263         if (conn->state == BT_CONFIG) {
1264                 if (!status)
1265                         conn->state = BT_CONNECTED;
1266
1267                 hci_connect_cfm(conn, status);
1268                 hci_conn_drop(conn);
1269                 return;
1270         }
1271
1272         if (!test_bit(HCI_CONN_ENCRYPT, &conn->flags))
1273                 encrypt = 0x00;
1274         else if (test_bit(HCI_CONN_AES_CCM, &conn->flags))
1275                 encrypt = 0x02;
1276         else
1277                 encrypt = 0x01;
1278
1279         if (!status) {
1280                 if (conn->sec_level == BT_SECURITY_SDP)
1281                         conn->sec_level = BT_SECURITY_LOW;
1282
1283                 if (conn->pending_sec_level > conn->sec_level)
1284                         conn->sec_level = conn->pending_sec_level;
1285         }
1286
1287         mutex_lock(&hci_cb_list_lock);
1288         list_for_each_entry(cb, &hci_cb_list, list) {
1289                 if (cb->security_cfm)
1290                         cb->security_cfm(conn, status, encrypt);
1291         }
1292         mutex_unlock(&hci_cb_list_lock);
1293
1294         if (conn->security_cfm_cb)
1295                 conn->security_cfm_cb(conn, status);
1296 }
1297
1298 static inline void hci_key_change_cfm(struct hci_conn *conn, __u8 status)
1299 {
1300         struct hci_cb *cb;
1301
1302         mutex_lock(&hci_cb_list_lock);
1303         list_for_each_entry(cb, &hci_cb_list, list) {
1304                 if (cb->key_change_cfm)
1305                         cb->key_change_cfm(conn, status);
1306         }
1307         mutex_unlock(&hci_cb_list_lock);
1308 }
1309
1310 static inline void hci_role_switch_cfm(struct hci_conn *conn, __u8 status,
1311                                                                 __u8 role)
1312 {
1313         struct hci_cb *cb;
1314
1315         mutex_lock(&hci_cb_list_lock);
1316         list_for_each_entry(cb, &hci_cb_list, list) {
1317                 if (cb->role_switch_cfm)
1318                         cb->role_switch_cfm(conn, status, role);
1319         }
1320         mutex_unlock(&hci_cb_list_lock);
1321 }
1322
1323 static inline void *eir_get_data(u8 *eir, size_t eir_len, u8 type,
1324                                  size_t *data_len)
1325 {
1326         size_t parsed = 0;
1327
1328         if (eir_len < 2)
1329                 return NULL;
1330
1331         while (parsed < eir_len - 1) {
1332                 u8 field_len = eir[0];
1333
1334                 if (field_len == 0)
1335                         break;
1336
1337                 parsed += field_len + 1;
1338
1339                 if (parsed > eir_len)
1340                         break;
1341
1342                 if (eir[1] != type) {
1343                         eir += field_len + 1;
1344                         continue;
1345                 }
1346
1347                 /* Zero length data */
1348                 if (field_len == 1)
1349                         return NULL;
1350
1351                 if (data_len)
1352                         *data_len = field_len - 1;
1353
1354                 return &eir[2];
1355         }
1356
1357         return NULL;
1358 }
1359
1360 static inline bool hci_bdaddr_is_rpa(bdaddr_t *bdaddr, u8 addr_type)
1361 {
1362         if (addr_type != ADDR_LE_DEV_RANDOM)
1363                 return false;
1364
1365         if ((bdaddr->b[5] & 0xc0) == 0x40)
1366                return true;
1367
1368         return false;
1369 }
1370
1371 static inline bool hci_is_identity_address(bdaddr_t *addr, u8 addr_type)
1372 {
1373         if (addr_type == ADDR_LE_DEV_PUBLIC)
1374                 return true;
1375
1376         /* Check for Random Static address type */
1377         if ((addr->b[5] & 0xc0) == 0xc0)
1378                 return true;
1379
1380         return false;
1381 }
1382
1383 static inline struct smp_irk *hci_get_irk(struct hci_dev *hdev,
1384                                           bdaddr_t *bdaddr, u8 addr_type)
1385 {
1386         if (!hci_bdaddr_is_rpa(bdaddr, addr_type))
1387                 return NULL;
1388
1389         return hci_find_irk_by_rpa(hdev, bdaddr);
1390 }
1391
1392 static inline int hci_check_conn_params(u16 min, u16 max, u16 latency,
1393                                         u16 to_multiplier)
1394 {
1395         u16 max_latency;
1396
1397         if (min > max || min < 6 || max > 3200)
1398                 return -EINVAL;
1399
1400         if (to_multiplier < 10 || to_multiplier > 3200)
1401                 return -EINVAL;
1402
1403         if (max >= to_multiplier * 8)
1404                 return -EINVAL;
1405
1406         max_latency = (to_multiplier * 4 / max) - 1;
1407         if (latency > 499 || latency > max_latency)
1408                 return -EINVAL;
1409
1410         return 0;
1411 }
1412
1413 int hci_register_cb(struct hci_cb *hcb);
1414 int hci_unregister_cb(struct hci_cb *hcb);
1415
1416 struct sk_buff *__hci_cmd_sync(struct hci_dev *hdev, u16 opcode, u32 plen,
1417                                const void *param, u32 timeout);
1418 struct sk_buff *__hci_cmd_sync_ev(struct hci_dev *hdev, u16 opcode, u32 plen,
1419                                   const void *param, u8 event, u32 timeout);
1420
1421 int hci_send_cmd(struct hci_dev *hdev, __u16 opcode, __u32 plen,
1422                  const void *param);
1423 void hci_send_acl(struct hci_chan *chan, struct sk_buff *skb, __u16 flags);
1424 void hci_send_sco(struct hci_conn *conn, struct sk_buff *skb);
1425
1426 void *hci_sent_cmd_data(struct hci_dev *hdev, __u16 opcode);
1427
1428 struct sk_buff *hci_cmd_sync(struct hci_dev *hdev, u16 opcode, u32 plen,
1429                              const void *param, u32 timeout);
1430
1431 /* ----- HCI Sockets ----- */
1432 void hci_send_to_sock(struct hci_dev *hdev, struct sk_buff *skb);
1433 void hci_send_to_channel(unsigned short channel, struct sk_buff *skb,
1434                          int flag, struct sock *skip_sk);
1435 void hci_send_to_monitor(struct hci_dev *hdev, struct sk_buff *skb);
1436 void hci_send_monitor_ctrl_event(struct hci_dev *hdev, u16 event,
1437                                  void *data, u16 data_len, ktime_t tstamp,
1438                                  int flag, struct sock *skip_sk);
1439
1440 void hci_sock_dev_event(struct hci_dev *hdev, int event);
1441
1442 #define HCI_MGMT_VAR_LEN        BIT(0)
1443 #define HCI_MGMT_NO_HDEV        BIT(1)
1444 #define HCI_MGMT_UNTRUSTED      BIT(2)
1445 #define HCI_MGMT_UNCONFIGURED   BIT(3)
1446
1447 struct hci_mgmt_handler {
1448         int (*func) (struct sock *sk, struct hci_dev *hdev, void *data,
1449                      u16 data_len);
1450         size_t data_len;
1451         unsigned long flags;
1452 };
1453
1454 struct hci_mgmt_chan {
1455         struct list_head list;
1456         unsigned short channel;
1457         size_t handler_count;
1458         const struct hci_mgmt_handler *handlers;
1459         void (*hdev_init) (struct sock *sk, struct hci_dev *hdev);
1460 };
1461
1462 int hci_mgmt_chan_register(struct hci_mgmt_chan *c);
1463 void hci_mgmt_chan_unregister(struct hci_mgmt_chan *c);
1464
1465 /* Management interface */
1466 #define DISCOV_TYPE_BREDR               (BIT(BDADDR_BREDR))
1467 #define DISCOV_TYPE_LE                  (BIT(BDADDR_LE_PUBLIC) | \
1468                                          BIT(BDADDR_LE_RANDOM))
1469 #define DISCOV_TYPE_INTERLEAVED         (BIT(BDADDR_BREDR) | \
1470                                          BIT(BDADDR_LE_PUBLIC) | \
1471                                          BIT(BDADDR_LE_RANDOM))
1472
1473 /* These LE scan and inquiry parameters were chosen according to LE General
1474  * Discovery Procedure specification.
1475  */
1476 #define DISCOV_LE_SCAN_WIN              0x12
1477 #define DISCOV_LE_SCAN_INT              0x12
1478 #define DISCOV_LE_TIMEOUT               10240   /* msec */
1479 #define DISCOV_INTERLEAVED_TIMEOUT      5120    /* msec */
1480 #define DISCOV_INTERLEAVED_INQUIRY_LEN  0x04
1481 #define DISCOV_BREDR_INQUIRY_LEN        0x08
1482 #define DISCOV_LE_RESTART_DELAY         msecs_to_jiffies(200)   /* msec */
1483
1484 void mgmt_fill_version_info(void *ver);
1485 int mgmt_new_settings(struct hci_dev *hdev);
1486 void mgmt_index_added(struct hci_dev *hdev);
1487 void mgmt_index_removed(struct hci_dev *hdev);
1488 void mgmt_set_powered_failed(struct hci_dev *hdev, int err);
1489 void mgmt_power_on(struct hci_dev *hdev, int err);
1490 void __mgmt_power_off(struct hci_dev *hdev);
1491 void mgmt_new_link_key(struct hci_dev *hdev, struct link_key *key,
1492                        bool persistent);
1493 void mgmt_device_connected(struct hci_dev *hdev, struct hci_conn *conn,
1494                            u32 flags, u8 *name, u8 name_len);
1495 void mgmt_device_disconnected(struct hci_dev *hdev, bdaddr_t *bdaddr,
1496                               u8 link_type, u8 addr_type, u8 reason,
1497                               bool mgmt_connected);
1498 void mgmt_disconnect_failed(struct hci_dev *hdev, bdaddr_t *bdaddr,
1499                             u8 link_type, u8 addr_type, u8 status);
1500 void mgmt_connect_failed(struct hci_dev *hdev, bdaddr_t *bdaddr, u8 link_type,
1501                          u8 addr_type, u8 status);
1502 void mgmt_pin_code_request(struct hci_dev *hdev, bdaddr_t *bdaddr, u8 secure);
1503 void mgmt_pin_code_reply_complete(struct hci_dev *hdev, bdaddr_t *bdaddr,
1504                                   u8 status);
1505 void mgmt_pin_code_neg_reply_complete(struct hci_dev *hdev, bdaddr_t *bdaddr,
1506                                       u8 status);
1507 int mgmt_user_confirm_request(struct hci_dev *hdev, bdaddr_t *bdaddr,
1508                               u8 link_type, u8 addr_type, u32 value,
1509                               u8 confirm_hint);
1510 int mgmt_user_confirm_reply_complete(struct hci_dev *hdev, bdaddr_t *bdaddr,
1511                                      u8 link_type, u8 addr_type, u8 status);
1512 int mgmt_user_confirm_neg_reply_complete(struct hci_dev *hdev, bdaddr_t *bdaddr,
1513                                          u8 link_type, u8 addr_type, u8 status);
1514 int mgmt_user_passkey_request(struct hci_dev *hdev, bdaddr_t *bdaddr,
1515                               u8 link_type, u8 addr_type);
1516 int mgmt_user_passkey_reply_complete(struct hci_dev *hdev, bdaddr_t *bdaddr,
1517                                      u8 link_type, u8 addr_type, u8 status);
1518 int mgmt_user_passkey_neg_reply_complete(struct hci_dev *hdev, bdaddr_t *bdaddr,
1519                                          u8 link_type, u8 addr_type, u8 status);
1520 int mgmt_user_passkey_notify(struct hci_dev *hdev, bdaddr_t *bdaddr,
1521                              u8 link_type, u8 addr_type, u32 passkey,
1522                              u8 entered);
1523 void mgmt_auth_failed(struct hci_conn *conn, u8 status);
1524 void mgmt_auth_enable_complete(struct hci_dev *hdev, u8 status);
1525 void mgmt_ssp_enable_complete(struct hci_dev *hdev, u8 enable, u8 status);
1526 void mgmt_set_class_of_dev_complete(struct hci_dev *hdev, u8 *dev_class,
1527                                     u8 status);
1528 void mgmt_set_local_name_complete(struct hci_dev *hdev, u8 *name, u8 status);
1529 void mgmt_start_discovery_complete(struct hci_dev *hdev, u8 status);
1530 void mgmt_stop_discovery_complete(struct hci_dev *hdev, u8 status);
1531 void mgmt_device_found(struct hci_dev *hdev, bdaddr_t *bdaddr, u8 link_type,
1532                        u8 addr_type, u8 *dev_class, s8 rssi, u32 flags,
1533                        u8 *eir, u16 eir_len, u8 *scan_rsp, u8 scan_rsp_len);
1534 void mgmt_remote_name(struct hci_dev *hdev, bdaddr_t *bdaddr, u8 link_type,
1535                       u8 addr_type, s8 rssi, u8 *name, u8 name_len);
1536 void mgmt_discovering(struct hci_dev *hdev, u8 discovering);
1537 bool mgmt_powering_down(struct hci_dev *hdev);
1538 void mgmt_new_ltk(struct hci_dev *hdev, struct smp_ltk *key, bool persistent);
1539 void mgmt_new_irk(struct hci_dev *hdev, struct smp_irk *irk, bool persistent);
1540 void mgmt_new_csrk(struct hci_dev *hdev, struct smp_csrk *csrk,
1541                    bool persistent);
1542 void mgmt_new_conn_param(struct hci_dev *hdev, bdaddr_t *bdaddr,
1543                          u8 bdaddr_type, u8 store_hint, u16 min_interval,
1544                          u16 max_interval, u16 latency, u16 timeout);
1545 void mgmt_smp_complete(struct hci_conn *conn, bool complete);
1546 bool mgmt_get_connectable(struct hci_dev *hdev);
1547 void mgmt_set_connectable_complete(struct hci_dev *hdev, u8 status);
1548 void mgmt_set_discoverable_complete(struct hci_dev *hdev, u8 status);
1549 u8 mgmt_get_adv_discov_flags(struct hci_dev *hdev);
1550 void mgmt_advertising_added(struct sock *sk, struct hci_dev *hdev,
1551                             u8 instance);
1552 void mgmt_advertising_removed(struct sock *sk, struct hci_dev *hdev,
1553                               u8 instance);
1554
1555 u8 hci_le_conn_update(struct hci_conn *conn, u16 min, u16 max, u16 latency,
1556                       u16 to_multiplier);
1557 void hci_le_start_enc(struct hci_conn *conn, __le16 ediv, __le64 rand,
1558                       __u8 ltk[16], __u8 key_size);
1559
1560 void hci_copy_identity_address(struct hci_dev *hdev, bdaddr_t *bdaddr,
1561                                u8 *bdaddr_type);
1562
1563 #define SCO_AIRMODE_MASK       0x0003
1564 #define SCO_AIRMODE_CVSD       0x0000
1565 #define SCO_AIRMODE_TRANSP     0x0003
1566
1567 #endif /* __HCI_CORE_H */