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