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         __u16           appearance;
 215         __u8            dev_class[3];
 216         __u8            major_class;
 217         __u8            minor_class;
 218         __u8            max_page;
 219         __u8            features[HCI_MAX_PAGES][8];
 220         __u8            le_features[8];
 221         __u8            le_white_list_size;
 222         __u8            le_states[8];
 223         __u8            commands[64];
 224         __u8            hci_ver;
 225         __u16           hci_rev;
 226         __u8            lmp_ver;
 227         __u16           manufacturer;
 228         __u16           lmp_subver;
 229         __u16           voice_setting;
 230         __u8            num_iac;
 231         __u8            stored_max_keys;
 232         __u8            stored_num_keys;
 233         __u8            io_capability;
 234         __s8            inq_tx_power;
 235         __u16           page_scan_interval;
 236         __u16           page_scan_window;
 237         __u8            page_scan_type;
 238         __u8            le_adv_channel_map;
 239         __u16           le_adv_min_interval;
 240         __u16           le_adv_max_interval;
 241         __u8            le_scan_type;
 242         __u16           le_scan_interval;
 243         __u16           le_scan_window;
 244         __u16           le_conn_min_interval;
 245         __u16           le_conn_max_interval;
 246         __u16           le_conn_latency;
 247         __u16           le_supv_timeout;
 248         __u16           le_def_tx_len;
 249         __u16           le_def_tx_time;
 250         __u16           le_max_tx_len;
 251         __u16           le_max_tx_time;
 252         __u16           le_max_rx_len;
 253         __u16           le_max_rx_time;
 254         __u16           discov_interleaved_timeout;
 255         __u16           conn_info_min_age;
 256         __u16           conn_info_max_age;
 257         __u8            ssp_debug_mode;
 258         __u8            hw_error_code;
 259         __u32           clock;
 260
 261         __u16           devid_source;
 262         __u16           devid_vendor;
 263         __u16           devid_product;
 264         __u16           devid_version;
 265
 266         __u16           pkt_type;
 267         __u16           esco_type;
 268         __u16           link_policy;
 269         __u16           link_mode;
 270
 271         __u32           idle_timeout;
 272         __u16           sniff_min_interval;
 273         __u16           sniff_max_interval;
 274
 275         __u8            amp_status;
 276         __u32           amp_total_bw;
 277         __u32           amp_max_bw;
 278         __u32           amp_min_latency;
 279         __u32           amp_max_pdu;
 280         __u8            amp_type;
 281         __u16           amp_pal_cap;
 282         __u16           amp_assoc_size;
 283         __u32           amp_max_flush_to;
 284         __u32           amp_be_flush_to;
 285
 286         struct amp_assoc        loc_assoc;
 287
 288         __u8            flow_ctl_mode;
 289
 290         unsigned int    auto_accept_delay;
 291
 292         unsigned long   quirks;
 293
 294         atomic_t        cmd_cnt;
 295         unsigned int    acl_cnt;
 296         unsigned int    sco_cnt;
 297         unsigned int    le_cnt;
 298
 299         unsigned int    acl_mtu;
 300         unsigned int    sco_mtu;
 301         unsigned int    le_mtu;
 302         unsigned int    acl_pkts;
 303         unsigned int    sco_pkts;
 304         unsigned int    le_pkts;
 305
 306         __u16           block_len;
 307         __u16           block_mtu;
 308         __u16           num_blocks;
 309         __u16           block_cnt;
 310
 311         unsigned long   acl_last_tx;
 312         unsigned long   sco_last_tx;
 313         unsigned long   le_last_tx;
 314
 315         struct workqueue_struct *workqueue;
 316         struct workqueue_struct *req_workqueue;
 317
 318         struct work_struct      power_on;
 319         struct delayed_work     power_off;
 320         struct work_struct      error_reset;
 321
 322         __u16                   discov_timeout;
 323         struct delayed_work     discov_off;
 324
 325         struct delayed_work     service_cache;
 326
 327         struct delayed_work     cmd_timer;
 328
 329         struct work_struct      rx_work;
 330         struct work_struct      cmd_work;
 331         struct work_struct      tx_work;
 332
 333         struct work_struct      discov_update;
 334         struct work_struct      bg_scan_update;
 335         struct work_struct      scan_update;
 336         struct work_struct      connectable_update;
 337         struct work_struct      discoverable_update;
 338         struct delayed_work     le_scan_disable;
 339         struct delayed_work     le_scan_restart;
 340
 341         struct sk_buff_head     rx_q;
 342         struct sk_buff_head     raw_q;
 343         struct sk_buff_head     cmd_q;
 344
 345         struct sk_buff          *sent_cmd;
 346
 347         struct mutex            req_lock;
 348         wait_queue_head_t       req_wait_q;
 349         __u32                   req_status;
 350         __u32                   req_result;
 351         struct sk_buff          *req_skb;
 352
 353         void                    *smp_data;
 354         void                    *smp_bredr_data;
 355
 356         struct discovery_state  discovery;
 357         struct hci_conn_hash    conn_hash;
 358
 359         struct list_head        mgmt_pending;
 360         struct list_head        blacklist;
 361         struct list_head        whitelist;
 362         struct list_head        uuids;
 363         struct list_head        link_keys;
 364         struct list_head        long_term_keys;
 365         struct list_head        identity_resolving_keys;
 366         struct list_head        remote_oob_data;
 367         struct list_head        le_white_list;
 368         struct list_head        le_conn_params;
 369         struct list_head        pend_le_conns;
 370         struct list_head        pend_le_reports;
 371
 372         struct hci_dev_stats    stat;
 373
 374         atomic_t                promisc;
 375
 376         const char              *hw_info;
 377         const char              *fw_info;
 378         struct dentry           *debugfs;
 379
 380         struct device           dev;
 381
 382         struct rfkill           *rfkill;
 383
 384         DECLARE_BITMAP(dev_flags, __HCI_NUM_FLAGS);
 385
 386         __s8                    adv_tx_power;
 387         __u8                    adv_data[HCI_MAX_AD_LENGTH];
 388         __u8                    adv_data_len;
 389         __u8                    scan_rsp_data[HCI_MAX_AD_LENGTH];
 390         __u8                    scan_rsp_data_len;
 391
 392         struct list_head        adv_instances;
 393         unsigned int            adv_instance_cnt;
 394         __u8                    cur_adv_instance;
 395         __u16                   adv_instance_timeout;
 396         struct delayed_work     adv_instance_expire;
 397
 398         __u8                    irk[16];
 399         __u32                   rpa_timeout;
 400         struct delayed_work     rpa_expired;
 401         bdaddr_t                rpa;
 402
 403 #if IS_ENABLED(CONFIG_BT_LEDS)
 404         struct led_trigger      *power_led;
 405 #endif
 406
 407         int (*open)(struct hci_dev *hdev);
 408         int (*close)(struct hci_dev *hdev);
 409         int (*flush)(struct hci_dev *hdev);
 410         int (*setup)(struct hci_dev *hdev);
 411         int (*shutdown)(struct hci_dev *hdev);
 412         int (*send)(struct hci_dev *hdev, struct sk_buff *skb);
 413         void (*notify)(struct hci_dev *hdev, unsigned int evt);
 414         void (*hw_error)(struct hci_dev *hdev, u8 code);
 415         int (*post_init)(struct hci_dev *hdev);
 416         int (*set_diag)(struct hci_dev *hdev, bool enable);
 417         int (*set_bdaddr)(struct hci_dev *hdev, const bdaddr_t *bdaddr);
 418 };
 419
 420 #define HCI_PHY_HANDLE(handle)  (handle & 0xff)
 421
 422 struct hci_conn {
 423         struct list_head list;
 424
 425         atomic_t        refcnt;
 426
 427         bdaddr_t        dst;
 428         __u8            dst_type;
 429         bdaddr_t        src;
 430         __u8            src_type;
 431         bdaddr_t        init_addr;
 432         __u8            init_addr_type;
 433         bdaddr_t        resp_addr;
 434         __u8            resp_addr_type;
 435         __u16           handle;
 436         __u16           state;
 437         __u8            mode;
 438         __u8            type;
 439         __u8            role;
 440         bool            out;
 441         __u8            attempt;
 442         __u8            dev_class[3];
 443         __u8            features[HCI_MAX_PAGES][8];
 444         __u16           pkt_type;
 445         __u16           link_policy;
 446         __u8            key_type;
 447         __u8            auth_type;
 448         __u8            sec_level;
 449         __u8            pending_sec_level;
 450         __u8            pin_length;
 451         __u8            enc_key_size;
 452         __u8            io_capability;
 453         __u32           passkey_notify;
 454         __u8            passkey_entered;
 455         __u16           disc_timeout;
 456         __u16           conn_timeout;
 457         __u16           setting;
 458         __u16           le_conn_min_interval;
 459         __u16           le_conn_max_interval;
 460         __u16           le_conn_interval;
 461         __u16           le_conn_latency;
 462         __u16           le_supv_timeout;
 463         __u8            le_adv_data[HCI_MAX_AD_LENGTH];
 464         __u8            le_adv_data_len;
 465         __s8            rssi;
 466         __s8            tx_power;
 467         __s8            max_tx_power;
 468         unsigned long   flags;
 469
 470         __u32           clock;
 471         __u16           clock_accuracy;
 472
 473         unsigned long   conn_info_timestamp;
 474
 475         __u8            remote_cap;
 476         __u8            remote_auth;
 477         __u8            remote_id;
 478
 479         unsigned int    sent;
 480
 481         struct sk_buff_head data_q;
 482         struct list_head chan_list;
 483
 484         struct delayed_work disc_work;
 485         struct delayed_work auto_accept_work;
 486         struct delayed_work idle_work;
 487         struct delayed_work le_conn_timeout;
 488         struct work_struct  le_scan_cleanup;
 489
 490         struct device   dev;
 491         struct dentry   *debugfs;
 492
 493         struct hci_dev  *hdev;
 494         void            *l2cap_data;
 495         void            *sco_data;
 496         struct amp_mgr  *amp_mgr;
 497
 498         struct hci_conn *link;
 499
 500         void (*connect_cfm_cb)  (struct hci_conn *conn, u8 status);
 501         void (*security_cfm_cb) (struct hci_conn *conn, u8 status);
 502         void (*disconn_cfm_cb)  (struct hci_conn *conn, u8 reason);
 503 };
 504
 505 struct hci_chan {
 506         struct list_head list;
 507         __u16 handle;
 508         struct hci_conn *conn;
 509         struct sk_buff_head data_q;
 510         unsigned int    sent;
 511         __u8            state;
 512 };
 513
 514 struct hci_conn_params {
 515         struct list_head list;
 516         struct list_head action;
 517
 518         bdaddr_t addr;
 519         u8 addr_type;
 520
 521         u16 conn_min_interval;
 522         u16 conn_max_interval;
 523         u16 conn_latency;
 524         u16 supervision_timeout;
 525
 526         enum {
 527                 HCI_AUTO_CONN_DISABLED,
 528                 HCI_AUTO_CONN_REPORT,
 529                 HCI_AUTO_CONN_DIRECT,
 530                 HCI_AUTO_CONN_ALWAYS,
 531                 HCI_AUTO_CONN_LINK_LOSS,
 532                 HCI_AUTO_CONN_EXPLICIT,
 533         } auto_connect;
 534
 535         struct hci_conn *conn;
 536         bool explicit_connect;
 537 };
 538
 539 extern struct list_head hci_dev_list;
 540 extern struct list_head hci_cb_list;
 541 extern rwlock_t hci_dev_list_lock;
 542 extern struct mutex hci_cb_list_lock;
 543
 544 #define hci_dev_set_flag(hdev, nr)             set_bit((nr), (hdev)->dev_flags)
 545 #define hci_dev_clear_flag(hdev, nr)           clear_bit((nr), (hdev)->dev_flags)
 546 #define hci_dev_change_flag(hdev, nr)          change_bit((nr), (hdev)->dev_flags)
 547 #define hci_dev_test_flag(hdev, nr)            test_bit((nr), (hdev)->dev_flags)
 548 #define hci_dev_test_and_set_flag(hdev, nr)    test_and_set_bit((nr), (hdev)->dev_flags)
 549 #define hci_dev_test_and_clear_flag(hdev, nr)  test_and_clear_bit((nr), (hdev)->dev_flags)
 550 #define hci_dev_test_and_change_flag(hdev, nr) test_and_change_bit((nr), (hdev)->dev_flags)
 551
 552 #define hci_dev_clear_volatile_flags(hdev)                      \
 553         do {                                                    \
 554                 hci_dev_clear_flag(hdev, HCI_LE_SCAN);          \
 555                 hci_dev_clear_flag(hdev, HCI_LE_ADV);           \
 556                 hci_dev_clear_flag(hdev, HCI_PERIODIC_INQ);     \
 557         } while (0)
 558
 559 /* ----- HCI interface to upper protocols ----- */
 560 int l2cap_connect_ind(struct hci_dev *hdev, bdaddr_t *bdaddr);
 561 int l2cap_disconn_ind(struct hci_conn *hcon);
 562 void l2cap_recv_acldata(struct hci_conn *hcon, struct sk_buff *skb, u16 flags);
 563
 564 #if IS_ENABLED(CONFIG_BT_BREDR)
 565 int sco_connect_ind(struct hci_dev *hdev, bdaddr_t *bdaddr, __u8 *flags);
 566 void sco_recv_scodata(struct hci_conn *hcon, struct sk_buff *skb);
 567 #else
 568 static inline int sco_connect_ind(struct hci_dev *hdev, bdaddr_t *bdaddr,
 569                                   __u8 *flags)
 570 {
 571         return 0;
 572 }
 573
 574 static inline void sco_recv_scodata(struct hci_conn *hcon, struct sk_buff *skb)
 575 {
 576 }
 577 #endif
 578
 579 /* ----- Inquiry cache ----- */
 580 #define INQUIRY_CACHE_AGE_MAX   (HZ*30)   /* 30 seconds */
 581 #define INQUIRY_ENTRY_AGE_MAX   (HZ*60)   /* 60 seconds */
 582
 583 static inline void discovery_init(struct hci_dev *hdev)
 584 {
 585         hdev->discovery.state = DISCOVERY_STOPPED;
 586         INIT_LIST_HEAD(&hdev->discovery.all);
 587         INIT_LIST_HEAD(&hdev->discovery.unknown);
 588         INIT_LIST_HEAD(&hdev->discovery.resolve);
 589         hdev->discovery.report_invalid_rssi = true;
 590         hdev->discovery.rssi = HCI_RSSI_INVALID;
 591 }
 592
 593 static inline void hci_discovery_filter_clear(struct hci_dev *hdev)
 594 {
 595         hdev->discovery.result_filtering = false;
 596         hdev->discovery.report_invalid_rssi = true;
 597         hdev->discovery.rssi = HCI_RSSI_INVALID;
 598         hdev->discovery.uuid_count = 0;
 599         kfree(hdev->discovery.uuids);
 600         hdev->discovery.uuids = NULL;
 601         hdev->discovery.scan_start = 0;
 602         hdev->discovery.scan_duration = 0;
 603 }
 604
 605 bool hci_discovery_active(struct hci_dev *hdev);
 606
 607 void hci_discovery_set_state(struct hci_dev *hdev, int state);
 608
 609 static inline int inquiry_cache_empty(struct hci_dev *hdev)
 610 {
 611         return list_empty(&hdev->discovery.all);
 612 }
 613
 614 static inline long inquiry_cache_age(struct hci_dev *hdev)
 615 {
 616         struct discovery_state *c = &hdev->discovery;
 617         return jiffies - c->timestamp;
 618 }
 619
 620 static inline long inquiry_entry_age(struct inquiry_entry *e)
 621 {
 622         return jiffies - e->timestamp;
 623 }
 624
 625 struct inquiry_entry *hci_inquiry_cache_lookup(struct hci_dev *hdev,
 626                                                bdaddr_t *bdaddr);
 627 struct inquiry_entry *hci_inquiry_cache_lookup_unknown(struct hci_dev *hdev,
 628                                                        bdaddr_t *bdaddr);
 629 struct inquiry_entry *hci_inquiry_cache_lookup_resolve(struct hci_dev *hdev,
 630                                                        bdaddr_t *bdaddr,
 631                                                        int state);
 632 void hci_inquiry_cache_update_resolve(struct hci_dev *hdev,
 633                                       struct inquiry_entry *ie);
 634 u32 hci_inquiry_cache_update(struct hci_dev *hdev, struct inquiry_data *data,
 635                              bool name_known);
 636 void hci_inquiry_cache_flush(struct hci_dev *hdev);
 637
 638 /* ----- HCI Connections ----- */
 639 enum {
 640         HCI_CONN_AUTH_PEND,
 641         HCI_CONN_REAUTH_PEND,
 642         HCI_CONN_ENCRYPT_PEND,
 643         HCI_CONN_RSWITCH_PEND,
 644         HCI_CONN_MODE_CHANGE_PEND,
 645         HCI_CONN_SCO_SETUP_PEND,
 646         HCI_CONN_MGMT_CONNECTED,
 647         HCI_CONN_SSP_ENABLED,
 648         HCI_CONN_SC_ENABLED,
 649         HCI_CONN_AES_CCM,
 650         HCI_CONN_POWER_SAVE,
 651         HCI_CONN_FLUSH_KEY,
 652         HCI_CONN_ENCRYPT,
 653         HCI_CONN_AUTH,
 654         HCI_CONN_SECURE,
 655         HCI_CONN_FIPS,
 656         HCI_CONN_STK_ENCRYPT,
 657         HCI_CONN_AUTH_INITIATOR,
 658         HCI_CONN_DROP,
 659         HCI_CONN_PARAM_REMOVAL_PEND,
 660         HCI_CONN_NEW_LINK_KEY,
 661         HCI_CONN_SCANNING,
 662         HCI_CONN_AUTH_FAILURE,
 663 };
 664
 665 static inline bool hci_conn_ssp_enabled(struct hci_conn *conn)
 666 {
 667         struct hci_dev *hdev = conn->hdev;
 668         return hci_dev_test_flag(hdev, HCI_SSP_ENABLED) &&
 669                test_bit(HCI_CONN_SSP_ENABLED, &conn->flags);
 670 }
 671
 672 static inline bool hci_conn_sc_enabled(struct hci_conn *conn)
 673 {
 674         struct hci_dev *hdev = conn->hdev;
 675         return hci_dev_test_flag(hdev, HCI_SC_ENABLED) &&
 676                test_bit(HCI_CONN_SC_ENABLED, &conn->flags);
 677 }
 678
 679 static inline void hci_conn_hash_add(struct hci_dev *hdev, struct hci_conn *c)
 680 {
 681         struct hci_conn_hash *h = &hdev->conn_hash;
 682         list_add_rcu(&c->list, &h->list);
 683         switch (c->type) {
 684         case ACL_LINK:
 685                 h->acl_num++;
 686                 break;
 687         case AMP_LINK:
 688                 h->amp_num++;
 689                 break;
 690         case LE_LINK:
 691                 h->le_num++;
 692                 if (c->role == HCI_ROLE_SLAVE)
 693                         h->le_num_slave++;
 694                 break;
 695         case SCO_LINK:
 696         case ESCO_LINK:
 697                 h->sco_num++;
 698                 break;
 699         }
 700 }
 701
 702 static inline void hci_conn_hash_del(struct hci_dev *hdev, struct hci_conn *c)
 703 {
 704         struct hci_conn_hash *h = &hdev->conn_hash;
 705
 706         list_del_rcu(&c->list);
 707         synchronize_rcu();
 708
 709         switch (c->type) {
 710         case ACL_LINK:
 711                 h->acl_num--;
 712                 break;
 713         case AMP_LINK:
 714                 h->amp_num--;
 715                 break;
 716         case LE_LINK:
 717                 h->le_num--;
 718                 if (c->role == HCI_ROLE_SLAVE)
 719                         h->le_num_slave--;
 720                 break;
 721         case SCO_LINK:
 722         case ESCO_LINK:
 723                 h->sco_num--;
 724                 break;
 725         }
 726 }
 727
 728 static inline unsigned int hci_conn_num(struct hci_dev *hdev, __u8 type)
 729 {
 730         struct hci_conn_hash *h = &hdev->conn_hash;
 731         switch (type) {
 732         case ACL_LINK:
 733                 return h->acl_num;
 734         case AMP_LINK:
 735                 return h->amp_num;
 736         case LE_LINK:
 737                 return h->le_num;
 738         case SCO_LINK:
 739         case ESCO_LINK:
 740                 return h->sco_num;
 741         default:
 742                 return 0;
 743         }
 744 }
 745
 746 static inline unsigned int hci_conn_count(struct hci_dev *hdev)
 747 {
 748         struct hci_conn_hash *c = &hdev->conn_hash;
 749
 750         return c->acl_num + c->amp_num + c->sco_num + c->le_num;
 751 }
 752
 753 static inline __u8 hci_conn_lookup_type(struct hci_dev *hdev, __u16 handle)
 754 {
 755         struct hci_conn_hash *h = &hdev->conn_hash;
 756         struct hci_conn *c;
 757         __u8 type = INVALID_LINK;
 758
 759         rcu_read_lock();
 760
 761         list_for_each_entry_rcu(c, &h->list, list) {
 762                 if (c->handle == handle) {
 763                         type = c->type;
 764                         break;
 765                 }
 766         }
 767
 768         rcu_read_unlock();
 769
 770         return type;
 771 }
 772
 773 static inline struct hci_conn *hci_conn_hash_lookup_handle(struct hci_dev *hdev,
 774                                                                 __u16 handle)
 775 {
 776         struct hci_conn_hash *h = &hdev->conn_hash;
 777         struct hci_conn  *c;
 778
 779         rcu_read_lock();
 780
 781         list_for_each_entry_rcu(c, &h->list, list) {
 782                 if (c->handle == handle) {
 783                         rcu_read_unlock();
 784                         return c;
 785                 }
 786         }
 787         rcu_read_unlock();
 788
 789         return NULL;
 790 }
 791
 792 static inline struct hci_conn *hci_conn_hash_lookup_ba(struct hci_dev *hdev,
 793                                                         __u8 type, bdaddr_t *ba)
 794 {
 795         struct hci_conn_hash *h = &hdev->conn_hash;
 796         struct hci_conn  *c;
 797
 798         rcu_read_lock();
 799
 800         list_for_each_entry_rcu(c, &h->list, list) {
 801                 if (c->type == type && !bacmp(&c->dst, ba)) {
 802                         rcu_read_unlock();
 803                         return c;
 804                 }
 805         }
 806
 807         rcu_read_unlock();
 808
 809         return NULL;
 810 }
 811
 812 static inline struct hci_conn *hci_conn_hash_lookup_le(struct hci_dev *hdev,
 813                                                        bdaddr_t *ba,
 814                                                        __u8 ba_type)
 815 {
 816         struct hci_conn_hash *h = &hdev->conn_hash;
 817         struct hci_conn  *c;
 818
 819         rcu_read_lock();
 820
 821         list_for_each_entry_rcu(c, &h->list, list) {
 822                 if (c->type != LE_LINK)
 823                        continue;
 824
 825                 if (ba_type == c->dst_type && !bacmp(&c->dst, ba)) {
 826                         rcu_read_unlock();
 827                         return c;
 828                 }
 829         }
 830
 831         rcu_read_unlock();
 832
 833         return NULL;
 834 }
 835
 836 static inline struct hci_conn *hci_conn_hash_lookup_state(struct hci_dev *hdev,
 837                                                         __u8 type, __u16 state)
 838 {
 839         struct hci_conn_hash *h = &hdev->conn_hash;
 840         struct hci_conn  *c;
 841
 842         rcu_read_lock();
 843
 844         list_for_each_entry_rcu(c, &h->list, list) {
 845                 if (c->type == type && c->state == state) {
 846                         rcu_read_unlock();
 847                         return c;
 848                 }
 849         }
 850
 851         rcu_read_unlock();
 852
 853         return NULL;
 854 }
 855
 856 static inline struct hci_conn *hci_lookup_le_connect(struct hci_dev *hdev)
 857 {
 858         struct hci_conn_hash *h = &hdev->conn_hash;
 859         struct hci_conn  *c;
 860
 861         rcu_read_lock();
 862
 863         list_for_each_entry_rcu(c, &h->list, list) {
 864                 if (c->type == LE_LINK && c->state == BT_CONNECT &&
 865                     !test_bit(HCI_CONN_SCANNING, &c->flags)) {
 866                         rcu_read_unlock();
 867                         return c;
 868                 }
 869         }
 870
 871         rcu_read_unlock();
 872
 873         return NULL;
 874 }
 875
 876 int hci_disconnect(struct hci_conn *conn, __u8 reason);
 877 bool hci_setup_sync(struct hci_conn *conn, __u16 handle);
 878 void hci_sco_setup(struct hci_conn *conn, __u8 status);
 879
 880 struct hci_conn *hci_conn_add(struct hci_dev *hdev, int type, bdaddr_t *dst,
 881                               u8 role);
 882 int hci_conn_del(struct hci_conn *conn);
 883 void hci_conn_hash_flush(struct hci_dev *hdev);
 884 void hci_conn_check_pending(struct hci_dev *hdev);
 885
 886 struct hci_chan *hci_chan_create(struct hci_conn *conn);
 887 void hci_chan_del(struct hci_chan *chan);
 888 void hci_chan_list_flush(struct hci_conn *conn);
 889 struct hci_chan *hci_chan_lookup_handle(struct hci_dev *hdev, __u16 handle);
 890
 891 struct hci_conn *hci_connect_le_scan(struct hci_dev *hdev, bdaddr_t *dst,
 892                                      u8 dst_type, u8 sec_level,
 893                                      u16 conn_timeout);
 894 struct hci_conn *hci_connect_le(struct hci_dev *hdev, bdaddr_t *dst,
 895                                 u8 dst_type, u8 sec_level, u16 conn_timeout,
 896                                 u8 role);
 897 struct hci_conn *hci_connect_acl(struct hci_dev *hdev, bdaddr_t *dst,
 898                                  u8 sec_level, u8 auth_type);
 899 struct hci_conn *hci_connect_sco(struct hci_dev *hdev, int type, bdaddr_t *dst,
 900                                  __u16 setting);
 901 int hci_conn_check_link_mode(struct hci_conn *conn);
 902 int hci_conn_check_secure(struct hci_conn *conn, __u8 sec_level);
 903 int hci_conn_security(struct hci_conn *conn, __u8 sec_level, __u8 auth_type,
 904                       bool initiator);
 905 int hci_conn_switch_role(struct hci_conn *conn, __u8 role);
 906
 907 void hci_conn_enter_active_mode(struct hci_conn *conn, __u8 force_active);
 908
 909 void hci_le_conn_failed(struct hci_conn *conn, u8 status);
 910
 911 /*
 912  * hci_conn_get() and hci_conn_put() are used to control the life-time of an
 913  * "hci_conn" object. They do not guarantee that the hci_conn object is running,
 914  * working or anything else. They just guarantee that the object is available
 915  * and can be dereferenced. So you can use its locks, local variables and any
 916  * other constant data.
 917  * Before accessing runtime data, you _must_ lock the object and then check that
 918  * it is still running. As soon as you release the locks, the connection might
 919  * get dropped, though.
 920  *
 921  * On the other hand, hci_conn_hold() and hci_conn_drop() are used to control
 922  * how long the underlying connection is held. So every channel that runs on the
 923  * hci_conn object calls this to prevent the connection from disappearing. As
 924  * long as you hold a device, you must also guarantee that you have a valid
 925  * reference to the device via hci_conn_get() (or the initial reference from
 926  * hci_conn_add()).
 927  * The hold()/drop() ref-count is known to drop below 0 sometimes, which doesn't
 928  * break because nobody cares for that. But this means, we cannot use
 929  * _get()/_drop() in it, but require the caller to have a valid ref (FIXME).
 930  */
 931
 932 static inline struct hci_conn *hci_conn_get(struct hci_conn *conn)
 933 {
 934         get_device(&conn->dev);
 935         return conn;
 936 }
 937
 938 static inline void hci_conn_put(struct hci_conn *conn)
 939 {
 940         put_device(&conn->dev);
 941 }
 942
 943 static inline void hci_conn_hold(struct hci_conn *conn)
 944 {
 945         BT_DBG("hcon %p orig refcnt %d", conn, atomic_read(&conn->refcnt));
 946
 947         atomic_inc(&conn->refcnt);
 948         cancel_delayed_work(&conn->disc_work);
 949 }
 950
 951 static inline void hci_conn_drop(struct hci_conn *conn)
 952 {
 953         BT_DBG("hcon %p orig refcnt %d", conn, atomic_read(&conn->refcnt));
 954
 955         if (atomic_dec_and_test(&conn->refcnt)) {
 956                 unsigned long timeo;
 957
 958                 switch (conn->type) {
 959                 case ACL_LINK:
 960                 case LE_LINK:
 961                         cancel_delayed_work(&conn->idle_work);
 962                         if (conn->state == BT_CONNECTED) {
 963                                 timeo = conn->disc_timeout;
 964                                 if (!conn->out)
 965                                         timeo *= 2;
 966                         } else {
 967                                 timeo = 0;
 968                         }
 969                         break;
 970
 971                 case AMP_LINK:
 972                         timeo = conn->disc_timeout;
 973                         break;
 974
 975                 default:
 976                         timeo = 0;
 977                         break;
 978                 }
 979
 980                 cancel_delayed_work(&conn->disc_work);
 981                 queue_delayed_work(conn->hdev->workqueue,
 982                                    &conn->disc_work, timeo);
 983         }
 984 }
 985
 986 /* ----- HCI Devices ----- */
 987 static inline void hci_dev_put(struct hci_dev *d)
 988 {
 989         BT_DBG("%s orig refcnt %d", d->name,
 990                kref_read(&d->dev.kobj.kref));
 991
 992         put_device(&d->dev);
 993 }
 994
 995 static inline struct hci_dev *hci_dev_hold(struct hci_dev *d)
 996 {
 997         BT_DBG("%s orig refcnt %d", d->name,
 998                kref_read(&d->dev.kobj.kref));
 999
1000         get_device(&d->dev);
1001         return d;
1002 }
1003
1004 #define hci_dev_lock(d)         mutex_lock(&d->lock)
1005 #define hci_dev_unlock(d)       mutex_unlock(&d->lock)
1006
1007 #define to_hci_dev(d) container_of(d, struct hci_dev, dev)
1008 #define to_hci_conn(c) container_of(c, struct hci_conn, dev)
1009
1010 static inline void *hci_get_drvdata(struct hci_dev *hdev)
1011 {
1012         return dev_get_drvdata(&hdev->dev);
1013 }
1014
1015 static inline void hci_set_drvdata(struct hci_dev *hdev, void *data)
1016 {
1017         dev_set_drvdata(&hdev->dev, data);
1018 }
1019
1020 struct hci_dev *hci_dev_get(int index);
1021 struct hci_dev *hci_get_route(bdaddr_t *dst, bdaddr_t *src, u8 src_type);
1022
1023 struct hci_dev *hci_alloc_dev(void);
1024 void hci_free_dev(struct hci_dev *hdev);
1025 int hci_register_dev(struct hci_dev *hdev);
1026 void hci_unregister_dev(struct hci_dev *hdev);
1027 int hci_suspend_dev(struct hci_dev *hdev);
1028 int hci_resume_dev(struct hci_dev *hdev);
1029 int hci_reset_dev(struct hci_dev *hdev);
1030 int hci_recv_frame(struct hci_dev *hdev, struct sk_buff *skb);
1031 int hci_recv_diag(struct hci_dev *hdev, struct sk_buff *skb);
1032 __printf(2, 3) void hci_set_hw_info(struct hci_dev *hdev, const char *fmt, ...);
1033 __printf(2, 3) void hci_set_fw_info(struct hci_dev *hdev, const char *fmt, ...);
1034 int hci_dev_open(__u16 dev);
1035 int hci_dev_close(__u16 dev);
1036 int hci_dev_do_close(struct hci_dev *hdev);
1037 int hci_dev_reset(__u16 dev);
1038 int hci_dev_reset_stat(__u16 dev);
1039 int hci_dev_cmd(unsigned int cmd, void __user *arg);
1040 int hci_get_dev_list(void __user *arg);
1041 int hci_get_dev_info(void __user *arg);
1042 int hci_get_conn_list(void __user *arg);
1043 int hci_get_conn_info(struct hci_dev *hdev, void __user *arg);
1044 int hci_get_auth_info(struct hci_dev *hdev, void __user *arg);
1045 int hci_inquiry(void __user *arg);
1046
1047 struct bdaddr_list *hci_bdaddr_list_lookup(struct list_head *list,
1048                                            bdaddr_t *bdaddr, u8 type);
1049 int hci_bdaddr_list_add(struct list_head *list, bdaddr_t *bdaddr, u8 type);
1050 int hci_bdaddr_list_del(struct list_head *list, bdaddr_t *bdaddr, u8 type);
1051 void hci_bdaddr_list_clear(struct list_head *list);
1052
1053 struct hci_conn_params *hci_conn_params_lookup(struct hci_dev *hdev,
1054                                                bdaddr_t *addr, u8 addr_type);
1055 struct hci_conn_params *hci_conn_params_add(struct hci_dev *hdev,
1056                                             bdaddr_t *addr, u8 addr_type);
1057 void hci_conn_params_del(struct hci_dev *hdev, bdaddr_t *addr, u8 addr_type);
1058 void hci_conn_params_clear_disabled(struct hci_dev *hdev);
1059
1060 struct hci_conn_params *hci_pend_le_action_lookup(struct list_head *list,
1061                                                   bdaddr_t *addr,
1062                                                   u8 addr_type);
1063
1064 void hci_uuids_clear(struct hci_dev *hdev);
1065
1066 void hci_link_keys_clear(struct hci_dev *hdev);
1067 struct link_key *hci_find_link_key(struct hci_dev *hdev, bdaddr_t *bdaddr);
1068 struct link_key *hci_add_link_key(struct hci_dev *hdev, struct hci_conn *conn,
1069                                   bdaddr_t *bdaddr, u8 *val, u8 type,
1070                                   u8 pin_len, bool *persistent);
1071 struct smp_ltk *hci_add_ltk(struct hci_dev *hdev, bdaddr_t *bdaddr,
1072                             u8 addr_type, u8 type, u8 authenticated,
1073                             u8 tk[16], u8 enc_size, __le16 ediv, __le64 rand);
1074 struct smp_ltk *hci_find_ltk(struct hci_dev *hdev, bdaddr_t *bdaddr,
1075                              u8 addr_type, u8 role);
1076 int hci_remove_ltk(struct hci_dev *hdev, bdaddr_t *bdaddr, u8 bdaddr_type);
1077 void hci_smp_ltks_clear(struct hci_dev *hdev);
1078 int hci_remove_link_key(struct hci_dev *hdev, bdaddr_t *bdaddr);
1079
1080 struct smp_irk *hci_find_irk_by_rpa(struct hci_dev *hdev, bdaddr_t *rpa);
1081 struct smp_irk *hci_find_irk_by_addr(struct hci_dev *hdev, bdaddr_t *bdaddr,
1082                                      u8 addr_type);
1083 struct smp_irk *hci_add_irk(struct hci_dev *hdev, bdaddr_t *bdaddr,
1084                             u8 addr_type, u8 val[16], bdaddr_t *rpa);
1085 void hci_remove_irk(struct hci_dev *hdev, bdaddr_t *bdaddr, u8 addr_type);
1086 void hci_smp_irks_clear(struct hci_dev *hdev);
1087
1088 bool hci_bdaddr_is_paired(struct hci_dev *hdev, bdaddr_t *bdaddr, u8 type);
1089
1090 void hci_remote_oob_data_clear(struct hci_dev *hdev);
1091 struct oob_data *hci_find_remote_oob_data(struct hci_dev *hdev,
1092                                           bdaddr_t *bdaddr, u8 bdaddr_type);
1093 int hci_add_remote_oob_data(struct hci_dev *hdev, bdaddr_t *bdaddr,
1094                             u8 bdaddr_type, u8 *hash192, u8 *rand192,
1095                             u8 *hash256, u8 *rand256);
1096 int hci_remove_remote_oob_data(struct hci_dev *hdev, bdaddr_t *bdaddr,
1097                                u8 bdaddr_type);
1098
1099 void hci_adv_instances_clear(struct hci_dev *hdev);
1100 struct adv_info *hci_find_adv_instance(struct hci_dev *hdev, u8 instance);
1101 struct adv_info *hci_get_next_instance(struct hci_dev *hdev, u8 instance);
1102 int hci_add_adv_instance(struct hci_dev *hdev, u8 instance, u32 flags,
1103                          u16 adv_data_len, u8 *adv_data,
1104                          u16 scan_rsp_len, u8 *scan_rsp_data,
1105                          u16 timeout, u16 duration);
1106 int hci_remove_adv_instance(struct hci_dev *hdev, u8 instance);
1107
1108 void hci_event_packet(struct hci_dev *hdev, struct sk_buff *skb);
1109
1110 void hci_init_sysfs(struct hci_dev *hdev);
1111 void hci_conn_init_sysfs(struct hci_conn *conn);
1112 void hci_conn_add_sysfs(struct hci_conn *conn);
1113 void hci_conn_del_sysfs(struct hci_conn *conn);
1114
1115 #define SET_HCIDEV_DEV(hdev, pdev) ((hdev)->dev.parent = (pdev))
1116
1117 /* ----- LMP capabilities ----- */
1118 #define lmp_encrypt_capable(dev)   ((dev)->features[0][0] & LMP_ENCRYPT)
1119 #define lmp_rswitch_capable(dev)   ((dev)->features[0][0] & LMP_RSWITCH)
1120 #define lmp_hold_capable(dev)      ((dev)->features[0][0] & LMP_HOLD)
1121 #define lmp_sniff_capable(dev)     ((dev)->features[0][0] & LMP_SNIFF)
1122 #define lmp_park_capable(dev)      ((dev)->features[0][1] & LMP_PARK)
1123 #define lmp_inq_rssi_capable(dev)  ((dev)->features[0][3] & LMP_RSSI_INQ)
1124 #define lmp_esco_capable(dev)      ((dev)->features[0][3] & LMP_ESCO)
1125 #define lmp_bredr_capable(dev)     (!((dev)->features[0][4] & LMP_NO_BREDR))
1126 #define lmp_le_capable(dev)        ((dev)->features[0][4] & LMP_LE)
1127 #define lmp_sniffsubr_capable(dev) ((dev)->features[0][5] & LMP_SNIFF_SUBR)
1128 #define lmp_pause_enc_capable(dev) ((dev)->features[0][5] & LMP_PAUSE_ENC)
1129 #define lmp_ext_inq_capable(dev)   ((dev)->features[0][6] & LMP_EXT_INQ)
1130 #define lmp_le_br_capable(dev)     (!!((dev)->features[0][6] & LMP_SIMUL_LE_BR))
1131 #define lmp_ssp_capable(dev)       ((dev)->features[0][6] & LMP_SIMPLE_PAIR)
1132 #define lmp_no_flush_capable(dev)  ((dev)->features[0][6] & LMP_NO_FLUSH)
1133 #define lmp_lsto_capable(dev)      ((dev)->features[0][7] & LMP_LSTO)
1134 #define lmp_inq_tx_pwr_capable(dev) ((dev)->features[0][7] & LMP_INQ_TX_PWR)
1135 #define lmp_ext_feat_capable(dev)  ((dev)->features[0][7] & LMP_EXTFEATURES)
1136 #define lmp_transp_capable(dev)    ((dev)->features[0][2] & LMP_TRANSPARENT)
1137
1138 /* ----- Extended LMP capabilities ----- */
1139 #define lmp_csb_master_capable(dev) ((dev)->features[2][0] & LMP_CSB_MASTER)
1140 #define lmp_csb_slave_capable(dev)  ((dev)->features[2][0] & LMP_CSB_SLAVE)
1141 #define lmp_sync_train_capable(dev) ((dev)->features[2][0] & LMP_SYNC_TRAIN)
1142 #define lmp_sync_scan_capable(dev)  ((dev)->features[2][0] & LMP_SYNC_SCAN)
1143 #define lmp_sc_capable(dev)         ((dev)->features[2][1] & LMP_SC)
1144 #define lmp_ping_capable(dev)       ((dev)->features[2][1] & LMP_PING)
1145
1146 /* ----- Host capabilities ----- */
1147 #define lmp_host_ssp_capable(dev)  ((dev)->features[1][0] & LMP_HOST_SSP)
1148 #define lmp_host_sc_capable(dev)   ((dev)->features[1][0] & LMP_HOST_SC)
1149 #define lmp_host_le_capable(dev)   (!!((dev)->features[1][0] & LMP_HOST_LE))
1150 #define lmp_host_le_br_capable(dev) (!!((dev)->features[1][0] & LMP_HOST_LE_BREDR))
1151
1152 #define hdev_is_powered(dev)   (test_bit(HCI_UP, &(dev)->flags) && \
1153                                 !hci_dev_test_flag(dev, HCI_AUTO_OFF))
1154 #define bredr_sc_enabled(dev)  (lmp_sc_capable(dev) && \
1155                                 hci_dev_test_flag(dev, HCI_SC_ENABLED))
1156
1157 /* ----- HCI protocols ----- */
1158 #define HCI_PROTO_DEFER             0x01
1159
1160 static inline int hci_proto_connect_ind(struct hci_dev *hdev, bdaddr_t *bdaddr,
1161                                         __u8 type, __u8 *flags)
1162 {
1163         switch (type) {
1164         case ACL_LINK:
1165                 return l2cap_connect_ind(hdev, bdaddr);
1166
1167         case SCO_LINK:
1168         case ESCO_LINK:
1169                 return sco_connect_ind(hdev, bdaddr, flags);
1170
1171         default:
1172                 BT_ERR("unknown link type %d", type);
1173                 return -EINVAL;
1174         }
1175 }
1176
1177 static inline int hci_proto_disconn_ind(struct hci_conn *conn)
1178 {
1179         if (conn->type != ACL_LINK && conn->type != LE_LINK)
1180                 return HCI_ERROR_REMOTE_USER_TERM;
1181
1182         return l2cap_disconn_ind(conn);
1183 }
1184
1185 /* ----- HCI callbacks ----- */
1186 struct hci_cb {
1187         struct list_head list;
1188
1189         char *name;
1190
1191         void (*connect_cfm)     (struct hci_conn *conn, __u8 status);
1192         void (*disconn_cfm)     (struct hci_conn *conn, __u8 status);
1193         void (*security_cfm)    (struct hci_conn *conn, __u8 status,
1194                                                                 __u8 encrypt);
1195         void (*key_change_cfm)  (struct hci_conn *conn, __u8 status);
1196         void (*role_switch_cfm) (struct hci_conn *conn, __u8 status, __u8 role);
1197 };
1198
1199 static inline void hci_connect_cfm(struct hci_conn *conn, __u8 status)
1200 {
1201         struct hci_cb *cb;
1202
1203         mutex_lock(&hci_cb_list_lock);
1204         list_for_each_entry(cb, &hci_cb_list, list) {
1205                 if (cb->connect_cfm)
1206                         cb->connect_cfm(conn, status);
1207         }
1208         mutex_unlock(&hci_cb_list_lock);
1209
1210         if (conn->connect_cfm_cb)
1211                 conn->connect_cfm_cb(conn, status);
1212 }
1213
1214 static inline void hci_disconn_cfm(struct hci_conn *conn, __u8 reason)
1215 {
1216         struct hci_cb *cb;
1217
1218         mutex_lock(&hci_cb_list_lock);
1219         list_for_each_entry(cb, &hci_cb_list, list) {
1220                 if (cb->disconn_cfm)
1221                         cb->disconn_cfm(conn, reason);
1222         }
1223         mutex_unlock(&hci_cb_list_lock);
1224
1225         if (conn->disconn_cfm_cb)
1226                 conn->disconn_cfm_cb(conn, reason);
1227 }
1228
1229 static inline void hci_auth_cfm(struct hci_conn *conn, __u8 status)
1230 {
1231         struct hci_cb *cb;
1232         __u8 encrypt;
1233
1234         if (test_bit(HCI_CONN_ENCRYPT_PEND, &conn->flags))
1235                 return;
1236
1237         encrypt = test_bit(HCI_CONN_ENCRYPT, &conn->flags) ? 0x01 : 0x00;
1238
1239         mutex_lock(&hci_cb_list_lock);
1240         list_for_each_entry(cb, &hci_cb_list, list) {
1241                 if (cb->security_cfm)
1242                         cb->security_cfm(conn, status, encrypt);
1243         }
1244         mutex_unlock(&hci_cb_list_lock);
1245
1246         if (conn->security_cfm_cb)
1247                 conn->security_cfm_cb(conn, status);
1248 }
1249
1250 static inline void hci_encrypt_cfm(struct hci_conn *conn, __u8 status,
1251                                                                 __u8 encrypt)
1252 {
1253         struct hci_cb *cb;
1254
1255         if (conn->sec_level == BT_SECURITY_SDP)
1256                 conn->sec_level = BT_SECURITY_LOW;
1257
1258         if (conn->pending_sec_level > conn->sec_level)
1259                 conn->sec_level = conn->pending_sec_level;
1260
1261         mutex_lock(&hci_cb_list_lock);
1262         list_for_each_entry(cb, &hci_cb_list, list) {
1263                 if (cb->security_cfm)
1264                         cb->security_cfm(conn, status, encrypt);
1265         }
1266         mutex_unlock(&hci_cb_list_lock);
1267
1268         if (conn->security_cfm_cb)
1269                 conn->security_cfm_cb(conn, status);
1270 }
1271
1272 static inline void hci_key_change_cfm(struct hci_conn *conn, __u8 status)
1273 {
1274         struct hci_cb *cb;
1275
1276         mutex_lock(&hci_cb_list_lock);
1277         list_for_each_entry(cb, &hci_cb_list, list) {
1278                 if (cb->key_change_cfm)
1279                         cb->key_change_cfm(conn, status);
1280         }
1281         mutex_unlock(&hci_cb_list_lock);
1282 }
1283
1284 static inline void hci_role_switch_cfm(struct hci_conn *conn, __u8 status,
1285                                                                 __u8 role)
1286 {
1287         struct hci_cb *cb;
1288
1289         mutex_lock(&hci_cb_list_lock);
1290         list_for_each_entry(cb, &hci_cb_list, list) {
1291                 if (cb->role_switch_cfm)
1292                         cb->role_switch_cfm(conn, status, role);
1293         }
1294         mutex_unlock(&hci_cb_list_lock);
1295 }
1296
1297 static inline void *eir_get_data(u8 *eir, size_t eir_len, u8 type,
1298                                  size_t *data_len)
1299 {
1300         size_t parsed = 0;
1301
1302         if (eir_len < 2)
1303                 return NULL;
1304
1305         while (parsed < eir_len - 1) {
1306                 u8 field_len = eir[0];
1307
1308                 if (field_len == 0)
1309                         break;
1310
1311                 parsed += field_len + 1;
1312
1313                 if (parsed > eir_len)
1314                         break;
1315
1316                 if (eir[1] != type) {
1317                         eir += field_len + 1;
1318                         continue;
1319                 }
1320
1321                 /* Zero length data */
1322                 if (field_len == 1)
1323                         return NULL;
1324
1325                 if (data_len)
1326                         *data_len = field_len - 1;
1327
1328                 return &eir[2];
1329         }
1330
1331         return NULL;
1332 }
1333
1334 static inline bool hci_bdaddr_is_rpa(bdaddr_t *bdaddr, u8 addr_type)
1335 {
1336         if (addr_type != ADDR_LE_DEV_RANDOM)
1337                 return false;
1338
1339         if ((bdaddr->b[5] & 0xc0) == 0x40)
1340                return true;
1341
1342         return false;
1343 }
1344
1345 static inline bool hci_is_identity_address(bdaddr_t *addr, u8 addr_type)
1346 {
1347         if (addr_type == ADDR_LE_DEV_PUBLIC)
1348                 return true;
1349
1350         /* Check for Random Static address type */
1351         if ((addr->b[5] & 0xc0) == 0xc0)
1352                 return true;
1353
1354         return false;
1355 }
1356
1357 static inline struct smp_irk *hci_get_irk(struct hci_dev *hdev,
1358                                           bdaddr_t *bdaddr, u8 addr_type)
1359 {
1360         if (!hci_bdaddr_is_rpa(bdaddr, addr_type))
1361                 return NULL;
1362
1363         return hci_find_irk_by_rpa(hdev, bdaddr);
1364 }
1365
1366 static inline int hci_check_conn_params(u16 min, u16 max, u16 latency,
1367                                         u16 to_multiplier)
1368 {
1369         u16 max_latency;
1370
1371         if (min > max || min < 6 || max > 3200)
1372                 return -EINVAL;
1373
1374         if (to_multiplier < 10 || to_multiplier > 3200)
1375                 return -EINVAL;
1376
1377         if (max >= to_multiplier * 8)
1378                 return -EINVAL;
1379
1380         max_latency = (to_multiplier * 4 / max) - 1;
1381         if (latency > 499 || latency > max_latency)
1382                 return -EINVAL;
1383
1384         return 0;
1385 }
1386
1387 int hci_register_cb(struct hci_cb *hcb);
1388 int hci_unregister_cb(struct hci_cb *hcb);
1389
1390 struct sk_buff *__hci_cmd_sync(struct hci_dev *hdev, u16 opcode, u32 plen,
1391                                const void *param, u32 timeout);
1392 struct sk_buff *__hci_cmd_sync_ev(struct hci_dev *hdev, u16 opcode, u32 plen,
1393                                   const void *param, u8 event, u32 timeout);
1394
1395 int hci_send_cmd(struct hci_dev *hdev, __u16 opcode, __u32 plen,
1396                  const void *param);
1397 void hci_send_acl(struct hci_chan *chan, struct sk_buff *skb, __u16 flags);
1398 void hci_send_sco(struct hci_conn *conn, struct sk_buff *skb);
1399
1400 void *hci_sent_cmd_data(struct hci_dev *hdev, __u16 opcode);
1401
1402 struct sk_buff *hci_cmd_sync(struct hci_dev *hdev, u16 opcode, u32 plen,
1403                              const void *param, u32 timeout);
1404
1405 /* ----- HCI Sockets ----- */
1406 void hci_send_to_sock(struct hci_dev *hdev, struct sk_buff *skb);
1407 void hci_send_to_channel(unsigned short channel, struct sk_buff *skb,
1408                          int flag, struct sock *skip_sk);
1409 void hci_send_to_monitor(struct hci_dev *hdev, struct sk_buff *skb);
1410 void hci_send_monitor_ctrl_event(struct hci_dev *hdev, u16 event,
1411                                  void *data, u16 data_len, ktime_t tstamp,
1412                                  int flag, struct sock *skip_sk);
1413
1414 void hci_sock_dev_event(struct hci_dev *hdev, int event);
1415
1416 #define HCI_MGMT_VAR_LEN        BIT(0)
1417 #define HCI_MGMT_NO_HDEV        BIT(1)
1418 #define HCI_MGMT_UNTRUSTED      BIT(2)
1419 #define HCI_MGMT_UNCONFIGURED   BIT(3)
1420
1421 struct hci_mgmt_handler {
1422         int (*func) (struct sock *sk, struct hci_dev *hdev, void *data,
1423                      u16 data_len);
1424         size_t data_len;
1425         unsigned long flags;
1426 };
1427
1428 struct hci_mgmt_chan {
1429         struct list_head list;
1430         unsigned short channel;
1431         size_t handler_count;
1432         const struct hci_mgmt_handler *handlers;
1433         void (*hdev_init) (struct sock *sk, struct hci_dev *hdev);
1434 };
1435
1436 int hci_mgmt_chan_register(struct hci_mgmt_chan *c);
1437 void hci_mgmt_chan_unregister(struct hci_mgmt_chan *c);
1438
1439 /* Management interface */
1440 #define DISCOV_TYPE_BREDR               (BIT(BDADDR_BREDR))
1441 #define DISCOV_TYPE_LE                  (BIT(BDADDR_LE_PUBLIC) | \
1442                                          BIT(BDADDR_LE_RANDOM))
1443 #define DISCOV_TYPE_INTERLEAVED         (BIT(BDADDR_BREDR) | \
1444                                          BIT(BDADDR_LE_PUBLIC) | \
1445                                          BIT(BDADDR_LE_RANDOM))
1446
1447 /* These LE scan and inquiry parameters were chosen according to LE General
1448  * Discovery Procedure specification.
1449  */
1450 #define DISCOV_LE_SCAN_WIN              0x12
1451 #define DISCOV_LE_SCAN_INT              0x12
1452 #define DISCOV_LE_TIMEOUT               10240   /* msec */
1453 #define DISCOV_INTERLEAVED_TIMEOUT      5120    /* msec */
1454 #define DISCOV_INTERLEAVED_INQUIRY_LEN  0x04
1455 #define DISCOV_BREDR_INQUIRY_LEN        0x08
1456 #define DISCOV_LE_RESTART_DELAY         msecs_to_jiffies(200)   /* msec */
1457
1458 void mgmt_fill_version_info(void *ver);
1459 int mgmt_new_settings(struct hci_dev *hdev);
1460 void mgmt_index_added(struct hci_dev *hdev);
1461 void mgmt_index_removed(struct hci_dev *hdev);
1462 void mgmt_set_powered_failed(struct hci_dev *hdev, int err);
1463 void mgmt_power_on(struct hci_dev *hdev, int err);
1464 void __mgmt_power_off(struct hci_dev *hdev);
1465 void mgmt_new_link_key(struct hci_dev *hdev, struct link_key *key,
1466                        bool persistent);
1467 void mgmt_device_connected(struct hci_dev *hdev, struct hci_conn *conn,
1468                            u32 flags, u8 *name, u8 name_len);
1469 void mgmt_device_disconnected(struct hci_dev *hdev, bdaddr_t *bdaddr,
1470                               u8 link_type, u8 addr_type, u8 reason,
1471                               bool mgmt_connected);
1472 void mgmt_disconnect_failed(struct hci_dev *hdev, bdaddr_t *bdaddr,
1473                             u8 link_type, u8 addr_type, u8 status);
1474 void mgmt_connect_failed(struct hci_dev *hdev, bdaddr_t *bdaddr, u8 link_type,
1475                          u8 addr_type, u8 status);
1476 void mgmt_pin_code_request(struct hci_dev *hdev, bdaddr_t *bdaddr, u8 secure);
1477 void mgmt_pin_code_reply_complete(struct hci_dev *hdev, bdaddr_t *bdaddr,
1478                                   u8 status);
1479 void mgmt_pin_code_neg_reply_complete(struct hci_dev *hdev, bdaddr_t *bdaddr,
1480                                       u8 status);
1481 int mgmt_user_confirm_request(struct hci_dev *hdev, bdaddr_t *bdaddr,
1482                               u8 link_type, u8 addr_type, u32 value,
1483                               u8 confirm_hint);
1484 int mgmt_user_confirm_reply_complete(struct hci_dev *hdev, bdaddr_t *bdaddr,
1485                                      u8 link_type, u8 addr_type, u8 status);
1486 int mgmt_user_confirm_neg_reply_complete(struct hci_dev *hdev, bdaddr_t *bdaddr,
1487                                          u8 link_type, u8 addr_type, u8 status);
1488 int mgmt_user_passkey_request(struct hci_dev *hdev, bdaddr_t *bdaddr,
1489                               u8 link_type, u8 addr_type);
1490 int mgmt_user_passkey_reply_complete(struct hci_dev *hdev, bdaddr_t *bdaddr,
1491                                      u8 link_type, u8 addr_type, u8 status);
1492 int mgmt_user_passkey_neg_reply_complete(struct hci_dev *hdev, bdaddr_t *bdaddr,
1493                                          u8 link_type, u8 addr_type, u8 status);
1494 int mgmt_user_passkey_notify(struct hci_dev *hdev, bdaddr_t *bdaddr,
1495                              u8 link_type, u8 addr_type, u32 passkey,
1496                              u8 entered);
1497 void mgmt_auth_failed(struct hci_conn *conn, u8 status);
1498 void mgmt_auth_enable_complete(struct hci_dev *hdev, u8 status);
1499 void mgmt_ssp_enable_complete(struct hci_dev *hdev, u8 enable, u8 status);
1500 void mgmt_set_class_of_dev_complete(struct hci_dev *hdev, u8 *dev_class,
1501                                     u8 status);
1502 void mgmt_set_local_name_complete(struct hci_dev *hdev, u8 *name, u8 status);
1503 void mgmt_start_discovery_complete(struct hci_dev *hdev, u8 status);
1504 void mgmt_stop_discovery_complete(struct hci_dev *hdev, u8 status);
1505 void mgmt_device_found(struct hci_dev *hdev, bdaddr_t *bdaddr, u8 link_type,
1506                        u8 addr_type, u8 *dev_class, s8 rssi, u32 flags,
1507                        u8 *eir, u16 eir_len, u8 *scan_rsp, u8 scan_rsp_len);
1508 void mgmt_remote_name(struct hci_dev *hdev, bdaddr_t *bdaddr, u8 link_type,
1509                       u8 addr_type, s8 rssi, u8 *name, u8 name_len);
1510 void mgmt_discovering(struct hci_dev *hdev, u8 discovering);
1511 bool mgmt_powering_down(struct hci_dev *hdev);
1512 void mgmt_new_ltk(struct hci_dev *hdev, struct smp_ltk *key, bool persistent);
1513 void mgmt_new_irk(struct hci_dev *hdev, struct smp_irk *irk, bool persistent);
1514 void mgmt_new_csrk(struct hci_dev *hdev, struct smp_csrk *csrk,
1515                    bool persistent);
1516 void mgmt_new_conn_param(struct hci_dev *hdev, bdaddr_t *bdaddr,
1517                          u8 bdaddr_type, u8 store_hint, u16 min_interval,
1518                          u16 max_interval, u16 latency, u16 timeout);
1519 void mgmt_smp_complete(struct hci_conn *conn, bool complete);
1520 bool mgmt_get_connectable(struct hci_dev *hdev);
1521 void mgmt_set_connectable_complete(struct hci_dev *hdev, u8 status);
1522 void mgmt_set_discoverable_complete(struct hci_dev *hdev, u8 status);
1523 u8 mgmt_get_adv_discov_flags(struct hci_dev *hdev);
1524 void mgmt_advertising_added(struct sock *sk, struct hci_dev *hdev,
1525                             u8 instance);
1526 void mgmt_advertising_removed(struct sock *sk, struct hci_dev *hdev,
1527                               u8 instance);
1528
1529 u8 hci_le_conn_update(struct hci_conn *conn, u16 min, u16 max, u16 latency,
1530                       u16 to_multiplier);
1531 void hci_le_start_enc(struct hci_conn *conn, __le16 ediv, __le64 rand,
1532                       __u8 ltk[16], __u8 key_size);
1533
1534 void hci_copy_identity_address(struct hci_dev *hdev, bdaddr_t *bdaddr,
1535                                u8 *bdaddr_type);
1536
1537 #define SCO_AIRMODE_MASK       0x0003
1538 #define SCO_AIRMODE_CVSD       0x0000
1539 #define SCO_AIRMODE_TRANSP     0x0003
1540
1541 #endif /* __HCI_CORE_H */