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_change_flag(hdev, nr) test_and_change_bit((nr), &(hdev)->dev_flags)
 511
 512 /* ----- HCI interface to upper protocols ----- */
 513 int l2cap_connect_ind(struct hci_dev *hdev, bdaddr_t *bdaddr);
 514 int l2cap_disconn_ind(struct hci_conn *hcon);
 515 int l2cap_recv_acldata(struct hci_conn *hcon, struct sk_buff *skb, u16 flags);
 516
 517 int sco_connect_ind(struct hci_dev *hdev, bdaddr_t *bdaddr, __u8 *flags);
 518 int sco_recv_scodata(struct hci_conn *hcon, struct sk_buff *skb);
 519
 520 /* ----- Inquiry cache ----- */
 521 #define INQUIRY_CACHE_AGE_MAX   (HZ*30)   /* 30 seconds */
 522 #define INQUIRY_ENTRY_AGE_MAX   (HZ*60)   /* 60 seconds */
 523
 524 static inline void discovery_init(struct hci_dev *hdev)
 525 {
 526         hdev->discovery.state = DISCOVERY_STOPPED;
 527         INIT_LIST_HEAD(&hdev->discovery.all);
 528         INIT_LIST_HEAD(&hdev->discovery.unknown);
 529         INIT_LIST_HEAD(&hdev->discovery.resolve);
 530         hdev->discovery.report_invalid_rssi = true;
 531         hdev->discovery.rssi = HCI_RSSI_INVALID;
 532 }
 533
 534 static inline void hci_discovery_filter_clear(struct hci_dev *hdev)
 535 {
 536         hdev->discovery.result_filtering = false;
 537         hdev->discovery.report_invalid_rssi = true;
 538         hdev->discovery.rssi = HCI_RSSI_INVALID;
 539         hdev->discovery.uuid_count = 0;
 540         kfree(hdev->discovery.uuids);
 541         hdev->discovery.uuids = NULL;
 542         hdev->discovery.scan_start = 0;
 543         hdev->discovery.scan_duration = 0;
 544 }
 545
 546 bool hci_discovery_active(struct hci_dev *hdev);
 547
 548 void hci_discovery_set_state(struct hci_dev *hdev, int state);
 549
 550 static inline int inquiry_cache_empty(struct hci_dev *hdev)
 551 {
 552         return list_empty(&hdev->discovery.all);
 553 }
 554
 555 static inline long inquiry_cache_age(struct hci_dev *hdev)
 556 {
 557         struct discovery_state *c = &hdev->discovery;
 558         return jiffies - c->timestamp;
 559 }
 560
 561 static inline long inquiry_entry_age(struct inquiry_entry *e)
 562 {
 563         return jiffies - e->timestamp;
 564 }
 565
 566 struct inquiry_entry *hci_inquiry_cache_lookup(struct hci_dev *hdev,
 567                                                bdaddr_t *bdaddr);
 568 struct inquiry_entry *hci_inquiry_cache_lookup_unknown(struct hci_dev *hdev,
 569                                                        bdaddr_t *bdaddr);
 570 struct inquiry_entry *hci_inquiry_cache_lookup_resolve(struct hci_dev *hdev,
 571                                                        bdaddr_t *bdaddr,
 572                                                        int state);
 573 void hci_inquiry_cache_update_resolve(struct hci_dev *hdev,
 574                                       struct inquiry_entry *ie);
 575 u32 hci_inquiry_cache_update(struct hci_dev *hdev, struct inquiry_data *data,
 576                              bool name_known);
 577 void hci_inquiry_cache_flush(struct hci_dev *hdev);
 578
 579 /* ----- HCI Connections ----- */
 580 enum {
 581         HCI_CONN_AUTH_PEND,
 582         HCI_CONN_REAUTH_PEND,
 583         HCI_CONN_ENCRYPT_PEND,
 584         HCI_CONN_RSWITCH_PEND,
 585         HCI_CONN_MODE_CHANGE_PEND,
 586         HCI_CONN_SCO_SETUP_PEND,
 587         HCI_CONN_MGMT_CONNECTED,
 588         HCI_CONN_SSP_ENABLED,
 589         HCI_CONN_SC_ENABLED,
 590         HCI_CONN_AES_CCM,
 591         HCI_CONN_POWER_SAVE,
 592         HCI_CONN_REMOTE_OOB,
 593         HCI_CONN_FLUSH_KEY,
 594         HCI_CONN_ENCRYPT,
 595         HCI_CONN_AUTH,
 596         HCI_CONN_SECURE,
 597         HCI_CONN_FIPS,
 598         HCI_CONN_STK_ENCRYPT,
 599         HCI_CONN_AUTH_INITIATOR,
 600         HCI_CONN_DROP,
 601         HCI_CONN_PARAM_REMOVAL_PEND,
 602         HCI_CONN_NEW_LINK_KEY,
 603 };
 604
 605 static inline bool hci_conn_ssp_enabled(struct hci_conn *conn)
 606 {
 607         struct hci_dev *hdev = conn->hdev;
 608         return hci_dev_test_flag(hdev, HCI_SSP_ENABLED) &&
 609                test_bit(HCI_CONN_SSP_ENABLED, &conn->flags);
 610 }
 611
 612 static inline bool hci_conn_sc_enabled(struct hci_conn *conn)
 613 {
 614         struct hci_dev *hdev = conn->hdev;
 615         return hci_dev_test_flag(hdev, HCI_SC_ENABLED) &&
 616                test_bit(HCI_CONN_SC_ENABLED, &conn->flags);
 617 }
 618
 619 static inline void hci_conn_hash_add(struct hci_dev *hdev, struct hci_conn *c)
 620 {
 621         struct hci_conn_hash *h = &hdev->conn_hash;
 622         list_add_rcu(&c->list, &h->list);
 623         switch (c->type) {
 624         case ACL_LINK:
 625                 h->acl_num++;
 626                 break;
 627         case AMP_LINK:
 628                 h->amp_num++;
 629                 break;
 630         case LE_LINK:
 631                 h->le_num++;
 632                 if (c->role == HCI_ROLE_SLAVE)
 633                         h->le_num_slave++;
 634                 break;
 635         case SCO_LINK:
 636         case ESCO_LINK:
 637                 h->sco_num++;
 638                 break;
 639         }
 640 }
 641
 642 static inline void hci_conn_hash_del(struct hci_dev *hdev, struct hci_conn *c)
 643 {
 644         struct hci_conn_hash *h = &hdev->conn_hash;
 645
 646         list_del_rcu(&c->list);
 647         synchronize_rcu();
 648
 649         switch (c->type) {
 650         case ACL_LINK:
 651                 h->acl_num--;
 652                 break;
 653         case AMP_LINK:
 654                 h->amp_num--;
 655                 break;
 656         case LE_LINK:
 657                 h->le_num--;
 658                 if (c->role == HCI_ROLE_SLAVE)
 659                         h->le_num_slave--;
 660                 break;
 661         case SCO_LINK:
 662         case ESCO_LINK:
 663                 h->sco_num--;
 664                 break;
 665         }
 666 }
 667
 668 static inline unsigned int hci_conn_num(struct hci_dev *hdev, __u8 type)
 669 {
 670         struct hci_conn_hash *h = &hdev->conn_hash;
 671         switch (type) {
 672         case ACL_LINK:
 673                 return h->acl_num;
 674         case AMP_LINK:
 675                 return h->amp_num;
 676         case LE_LINK:
 677                 return h->le_num;
 678         case SCO_LINK:
 679         case ESCO_LINK:
 680                 return h->sco_num;
 681         default:
 682                 return 0;
 683         }
 684 }
 685
 686 static inline unsigned int hci_conn_count(struct hci_dev *hdev)
 687 {
 688         struct hci_conn_hash *c = &hdev->conn_hash;
 689
 690         return c->acl_num + c->amp_num + c->sco_num + c->le_num;
 691 }
 692
 693 static inline __u8 hci_conn_lookup_type(struct hci_dev *hdev, __u16 handle)
 694 {
 695         struct hci_conn_hash *h = &hdev->conn_hash;
 696         struct hci_conn *c;
 697         __u8 type = INVALID_LINK;
 698
 699         rcu_read_lock();
 700
 701         list_for_each_entry_rcu(c, &h->list, list) {
 702                 if (c->handle == handle) {
 703                         type = c->type;
 704                         break;
 705                 }
 706         }
 707
 708         rcu_read_unlock();
 709
 710         return type;
 711 }
 712
 713 static inline struct hci_conn *hci_conn_hash_lookup_handle(struct hci_dev *hdev,
 714                                                                 __u16 handle)
 715 {
 716         struct hci_conn_hash *h = &hdev->conn_hash;
 717         struct hci_conn  *c;
 718
 719         rcu_read_lock();
 720
 721         list_for_each_entry_rcu(c, &h->list, list) {
 722                 if (c->handle == handle) {
 723                         rcu_read_unlock();
 724                         return c;
 725                 }
 726         }
 727         rcu_read_unlock();
 728
 729         return NULL;
 730 }
 731
 732 static inline struct hci_conn *hci_conn_hash_lookup_ba(struct hci_dev *hdev,
 733                                                         __u8 type, bdaddr_t *ba)
 734 {
 735         struct hci_conn_hash *h = &hdev->conn_hash;
 736         struct hci_conn  *c;
 737
 738         rcu_read_lock();
 739
 740         list_for_each_entry_rcu(c, &h->list, list) {
 741                 if (c->type == type && !bacmp(&c->dst, ba)) {
 742                         rcu_read_unlock();
 743                         return c;
 744                 }
 745         }
 746
 747         rcu_read_unlock();
 748
 749         return NULL;
 750 }
 751
 752 static inline struct hci_conn *hci_conn_hash_lookup_state(struct hci_dev *hdev,
 753                                                         __u8 type, __u16 state)
 754 {
 755         struct hci_conn_hash *h = &hdev->conn_hash;
 756         struct hci_conn  *c;
 757
 758         rcu_read_lock();
 759
 760         list_for_each_entry_rcu(c, &h->list, list) {
 761                 if (c->type == type && c->state == state) {
 762                         rcu_read_unlock();
 763                         return c;
 764                 }
 765         }
 766
 767         rcu_read_unlock();
 768
 769         return NULL;
 770 }
 771
 772 int hci_disconnect(struct hci_conn *conn, __u8 reason);
 773 bool hci_setup_sync(struct hci_conn *conn, __u16 handle);
 774 void hci_sco_setup(struct hci_conn *conn, __u8 status);
 775
 776 struct hci_conn *hci_conn_add(struct hci_dev *hdev, int type, bdaddr_t *dst,
 777                               u8 role);
 778 int hci_conn_del(struct hci_conn *conn);
 779 void hci_conn_hash_flush(struct hci_dev *hdev);
 780 void hci_conn_check_pending(struct hci_dev *hdev);
 781
 782 struct hci_chan *hci_chan_create(struct hci_conn *conn);
 783 void hci_chan_del(struct hci_chan *chan);
 784 void hci_chan_list_flush(struct hci_conn *conn);
 785 struct hci_chan *hci_chan_lookup_handle(struct hci_dev *hdev, __u16 handle);
 786
 787 struct hci_conn *hci_connect_le(struct hci_dev *hdev, bdaddr_t *dst,
 788                                 u8 dst_type, u8 sec_level, u16 conn_timeout,
 789                                 u8 role);
 790 struct hci_conn *hci_connect_acl(struct hci_dev *hdev, bdaddr_t *dst,
 791                                  u8 sec_level, u8 auth_type);
 792 struct hci_conn *hci_connect_sco(struct hci_dev *hdev, int type, bdaddr_t *dst,
 793                                  __u16 setting);
 794 int hci_conn_check_link_mode(struct hci_conn *conn);
 795 int hci_conn_check_secure(struct hci_conn *conn, __u8 sec_level);
 796 int hci_conn_security(struct hci_conn *conn, __u8 sec_level, __u8 auth_type,
 797                       bool initiator);
 798 int hci_conn_switch_role(struct hci_conn *conn, __u8 role);
 799
 800 void hci_conn_enter_active_mode(struct hci_conn *conn, __u8 force_active);
 801
 802 void hci_le_conn_failed(struct hci_conn *conn, u8 status);
 803
 804 /*
 805  * hci_conn_get() and hci_conn_put() are used to control the life-time of an
 806  * "hci_conn" object. They do not guarantee that the hci_conn object is running,
 807  * working or anything else. They just guarantee that the object is available
 808  * and can be dereferenced. So you can use its locks, local variables and any
 809  * other constant data.
 810  * Before accessing runtime data, you _must_ lock the object and then check that
 811  * it is still running. As soon as you release the locks, the connection might
 812  * get dropped, though.
 813  *
 814  * On the other hand, hci_conn_hold() and hci_conn_drop() are used to control
 815  * how long the underlying connection is held. So every channel that runs on the
 816  * hci_conn object calls this to prevent the connection from disappearing. As
 817  * long as you hold a device, you must also guarantee that you have a valid
 818  * reference to the device via hci_conn_get() (or the initial reference from
 819  * hci_conn_add()).
 820  * The hold()/drop() ref-count is known to drop below 0 sometimes, which doesn't
 821  * break because nobody cares for that. But this means, we cannot use
 822  * _get()/_drop() in it, but require the caller to have a valid ref (FIXME).
 823  */
 824
 825 static inline struct hci_conn *hci_conn_get(struct hci_conn *conn)
 826 {
 827         get_device(&conn->dev);
 828         return conn;
 829 }
 830
 831 static inline void hci_conn_put(struct hci_conn *conn)
 832 {
 833         put_device(&conn->dev);
 834 }
 835
 836 static inline void hci_conn_hold(struct hci_conn *conn)
 837 {
 838         BT_DBG("hcon %p orig refcnt %d", conn, atomic_read(&conn->refcnt));
 839
 840         atomic_inc(&conn->refcnt);
 841         cancel_delayed_work(&conn->disc_work);
 842 }
 843
 844 static inline void hci_conn_drop(struct hci_conn *conn)
 845 {
 846         BT_DBG("hcon %p orig refcnt %d", conn, atomic_read(&conn->refcnt));
 847
 848         if (atomic_dec_and_test(&conn->refcnt)) {
 849                 unsigned long timeo;
 850
 851                 switch (conn->type) {
 852                 case ACL_LINK:
 853                 case LE_LINK:
 854                         cancel_delayed_work(&conn->idle_work);
 855                         if (conn->state == BT_CONNECTED) {
 856                                 timeo = conn->disc_timeout;
 857                                 if (!conn->out)
 858                                         timeo *= 2;
 859                         } else {
 860                                 timeo = 0;
 861                         }
 862                         break;
 863
 864                 case AMP_LINK:
 865                         timeo = conn->disc_timeout;
 866                         break;
 867
 868                 default:
 869                         timeo = 0;
 870                         break;
 871                 }
 872
 873                 cancel_delayed_work(&conn->disc_work);
 874                 queue_delayed_work(conn->hdev->workqueue,
 875                                    &conn->disc_work, timeo);
 876         }
 877 }
 878
 879 /* ----- HCI Devices ----- */
 880 static inline void hci_dev_put(struct hci_dev *d)
 881 {
 882         BT_DBG("%s orig refcnt %d", d->name,
 883                atomic_read(&d->dev.kobj.kref.refcount));
 884
 885         put_device(&d->dev);
 886 }
 887
 888 static inline struct hci_dev *hci_dev_hold(struct hci_dev *d)
 889 {
 890         BT_DBG("%s orig refcnt %d", d->name,
 891                atomic_read(&d->dev.kobj.kref.refcount));
 892
 893         get_device(&d->dev);
 894         return d;
 895 }
 896
 897 #define hci_dev_lock(d)         mutex_lock(&d->lock)
 898 #define hci_dev_unlock(d)       mutex_unlock(&d->lock)
 899
 900 #define to_hci_dev(d) container_of(d, struct hci_dev, dev)
 901 #define to_hci_conn(c) container_of(c, struct hci_conn, dev)
 902
 903 static inline void *hci_get_drvdata(struct hci_dev *hdev)
 904 {
 905         return dev_get_drvdata(&hdev->dev);
 906 }
 907
 908 static inline void hci_set_drvdata(struct hci_dev *hdev, void *data)
 909 {
 910         dev_set_drvdata(&hdev->dev, data);
 911 }
 912
 913 struct hci_dev *hci_dev_get(int index);
 914 struct hci_dev *hci_get_route(bdaddr_t *dst, bdaddr_t *src);
 915
 916 struct hci_dev *hci_alloc_dev(void);
 917 void hci_free_dev(struct hci_dev *hdev);
 918 int hci_register_dev(struct hci_dev *hdev);
 919 void hci_unregister_dev(struct hci_dev *hdev);
 920 int hci_suspend_dev(struct hci_dev *hdev);
 921 int hci_resume_dev(struct hci_dev *hdev);
 922 int hci_reset_dev(struct hci_dev *hdev);
 923 int hci_dev_open(__u16 dev);
 924 int hci_dev_close(__u16 dev);
 925 int hci_dev_reset(__u16 dev);
 926 int hci_dev_reset_stat(__u16 dev);
 927 int hci_dev_cmd(unsigned int cmd, void __user *arg);
 928 int hci_get_dev_list(void __user *arg);
 929 int hci_get_dev_info(void __user *arg);
 930 int hci_get_conn_list(void __user *arg);
 931 int hci_get_conn_info(struct hci_dev *hdev, void __user *arg);
 932 int hci_get_auth_info(struct hci_dev *hdev, void __user *arg);
 933 int hci_inquiry(void __user *arg);
 934
 935 struct bdaddr_list *hci_bdaddr_list_lookup(struct list_head *list,
 936                                            bdaddr_t *bdaddr, u8 type);
 937 int hci_bdaddr_list_add(struct list_head *list, bdaddr_t *bdaddr, u8 type);
 938 int hci_bdaddr_list_del(struct list_head *list, bdaddr_t *bdaddr, u8 type);
 939 void hci_bdaddr_list_clear(struct list_head *list);
 940
 941 struct hci_conn_params *hci_conn_params_lookup(struct hci_dev *hdev,
 942                                                bdaddr_t *addr, u8 addr_type);
 943 struct hci_conn_params *hci_conn_params_add(struct hci_dev *hdev,
 944                                             bdaddr_t *addr, u8 addr_type);
 945 void hci_conn_params_del(struct hci_dev *hdev, bdaddr_t *addr, u8 addr_type);
 946 void hci_conn_params_clear_all(struct hci_dev *hdev);
 947 void hci_conn_params_clear_disabled(struct hci_dev *hdev);
 948
 949 struct hci_conn_params *hci_pend_le_action_lookup(struct list_head *list,
 950                                                   bdaddr_t *addr,
 951                                                   u8 addr_type);
 952
 953 void hci_uuids_clear(struct hci_dev *hdev);
 954
 955 void hci_link_keys_clear(struct hci_dev *hdev);
 956 struct link_key *hci_find_link_key(struct hci_dev *hdev, bdaddr_t *bdaddr);
 957 struct link_key *hci_add_link_key(struct hci_dev *hdev, struct hci_conn *conn,
 958                                   bdaddr_t *bdaddr, u8 *val, u8 type,
 959                                   u8 pin_len, bool *persistent);
 960 struct smp_ltk *hci_add_ltk(struct hci_dev *hdev, bdaddr_t *bdaddr,
 961                             u8 addr_type, u8 type, u8 authenticated,
 962                             u8 tk[16], u8 enc_size, __le16 ediv, __le64 rand);
 963 struct smp_ltk *hci_find_ltk(struct hci_dev *hdev, bdaddr_t *bdaddr,
 964                              u8 addr_type, u8 role);
 965 int hci_remove_ltk(struct hci_dev *hdev, bdaddr_t *bdaddr, u8 bdaddr_type);
 966 void hci_smp_ltks_clear(struct hci_dev *hdev);
 967 int hci_remove_link_key(struct hci_dev *hdev, bdaddr_t *bdaddr);
 968
 969 struct smp_irk *hci_find_irk_by_rpa(struct hci_dev *hdev, bdaddr_t *rpa);
 970 struct smp_irk *hci_find_irk_by_addr(struct hci_dev *hdev, bdaddr_t *bdaddr,
 971                                      u8 addr_type);
 972 struct smp_irk *hci_add_irk(struct hci_dev *hdev, bdaddr_t *bdaddr,
 973                             u8 addr_type, u8 val[16], bdaddr_t *rpa);
 974 void hci_remove_irk(struct hci_dev *hdev, bdaddr_t *bdaddr, u8 addr_type);
 975 void hci_smp_irks_clear(struct hci_dev *hdev);
 976
 977 bool hci_bdaddr_is_paired(struct hci_dev *hdev, bdaddr_t *bdaddr, u8 type);
 978
 979 void hci_remote_oob_data_clear(struct hci_dev *hdev);
 980 struct oob_data *hci_find_remote_oob_data(struct hci_dev *hdev,
 981                                           bdaddr_t *bdaddr, u8 bdaddr_type);
 982 int hci_add_remote_oob_data(struct hci_dev *hdev, bdaddr_t *bdaddr,
 983                             u8 bdaddr_type, u8 *hash192, u8 *rand192,
 984                             u8 *hash256, u8 *rand256);
 985 int hci_remove_remote_oob_data(struct hci_dev *hdev, bdaddr_t *bdaddr,
 986                                u8 bdaddr_type);
 987
 988 void hci_event_packet(struct hci_dev *hdev, struct sk_buff *skb);
 989
 990 int hci_recv_frame(struct hci_dev *hdev, struct sk_buff *skb);
 991 int hci_recv_stream_fragment(struct hci_dev *hdev, void *data, int count);
 992
 993 void hci_init_sysfs(struct hci_dev *hdev);
 994 void hci_conn_init_sysfs(struct hci_conn *conn);
 995 void hci_conn_add_sysfs(struct hci_conn *conn);
 996 void hci_conn_del_sysfs(struct hci_conn *conn);
 997
 998 #define SET_HCIDEV_DEV(hdev, pdev) ((hdev)->dev.parent = (pdev))
 999
1000 /* ----- LMP capabilities ----- */
1001 #define lmp_encrypt_capable(dev)   ((dev)->features[0][0] & LMP_ENCRYPT)
1002 #define lmp_rswitch_capable(dev)   ((dev)->features[0][0] & LMP_RSWITCH)
1003 #define lmp_hold_capable(dev)      ((dev)->features[0][0] & LMP_HOLD)
1004 #define lmp_sniff_capable(dev)     ((dev)->features[0][0] & LMP_SNIFF)
1005 #define lmp_park_capable(dev)      ((dev)->features[0][1] & LMP_PARK)
1006 #define lmp_inq_rssi_capable(dev)  ((dev)->features[0][3] & LMP_RSSI_INQ)
1007 #define lmp_esco_capable(dev)      ((dev)->features[0][3] & LMP_ESCO)
1008 #define lmp_bredr_capable(dev)     (!((dev)->features[0][4] & LMP_NO_BREDR))
1009 #define lmp_le_capable(dev)        ((dev)->features[0][4] & LMP_LE)
1010 #define lmp_sniffsubr_capable(dev) ((dev)->features[0][5] & LMP_SNIFF_SUBR)
1011 #define lmp_pause_enc_capable(dev) ((dev)->features[0][5] & LMP_PAUSE_ENC)
1012 #define lmp_ext_inq_capable(dev)   ((dev)->features[0][6] & LMP_EXT_INQ)
1013 #define lmp_le_br_capable(dev)     (!!((dev)->features[0][6] & LMP_SIMUL_LE_BR))
1014 #define lmp_ssp_capable(dev)       ((dev)->features[0][6] & LMP_SIMPLE_PAIR)
1015 #define lmp_no_flush_capable(dev)  ((dev)->features[0][6] & LMP_NO_FLUSH)
1016 #define lmp_lsto_capable(dev)      ((dev)->features[0][7] & LMP_LSTO)
1017 #define lmp_inq_tx_pwr_capable(dev) ((dev)->features[0][7] & LMP_INQ_TX_PWR)
1018 #define lmp_ext_feat_capable(dev)  ((dev)->features[0][7] & LMP_EXTFEATURES)
1019 #define lmp_transp_capable(dev)    ((dev)->features[0][2] & LMP_TRANSPARENT)
1020
1021 /* ----- Extended LMP capabilities ----- */
1022 #define lmp_csb_master_capable(dev) ((dev)->features[2][0] & LMP_CSB_MASTER)
1023 #define lmp_csb_slave_capable(dev)  ((dev)->features[2][0] & LMP_CSB_SLAVE)
1024 #define lmp_sync_train_capable(dev) ((dev)->features[2][0] & LMP_SYNC_TRAIN)
1025 #define lmp_sync_scan_capable(dev)  ((dev)->features[2][0] & LMP_SYNC_SCAN)
1026 #define lmp_sc_capable(dev)         ((dev)->features[2][1] & LMP_SC)
1027 #define lmp_ping_capable(dev)       ((dev)->features[2][1] & LMP_PING)
1028
1029 /* ----- Host capabilities ----- */
1030 #define lmp_host_ssp_capable(dev)  ((dev)->features[1][0] & LMP_HOST_SSP)
1031 #define lmp_host_sc_capable(dev)   ((dev)->features[1][0] & LMP_HOST_SC)
1032 #define lmp_host_le_capable(dev)   (!!((dev)->features[1][0] & LMP_HOST_LE))
1033 #define lmp_host_le_br_capable(dev) (!!((dev)->features[1][0] & LMP_HOST_LE_BREDR))
1034
1035 #define hdev_is_powered(dev)   (test_bit(HCI_UP, &(dev)->flags) && \
1036                                 !hci_dev_test_flag(dev, HCI_AUTO_OFF))
1037 #define bredr_sc_enabled(dev)  (lmp_sc_capable(dev) && \
1038                                 hci_dev_test_flag(dev, HCI_SC_ENABLED))
1039
1040 /* ----- HCI protocols ----- */
1041 #define HCI_PROTO_DEFER             0x01
1042
1043 static inline int hci_proto_connect_ind(struct hci_dev *hdev, bdaddr_t *bdaddr,
1044                                         __u8 type, __u8 *flags)
1045 {
1046         switch (type) {
1047         case ACL_LINK:
1048                 return l2cap_connect_ind(hdev, bdaddr);
1049
1050         case SCO_LINK:
1051         case ESCO_LINK:
1052                 return sco_connect_ind(hdev, bdaddr, flags);
1053
1054         default:
1055                 BT_ERR("unknown link type %d", type);
1056                 return -EINVAL;
1057         }
1058 }
1059
1060 static inline int hci_proto_disconn_ind(struct hci_conn *conn)
1061 {
1062         if (conn->type != ACL_LINK && conn->type != LE_LINK)
1063                 return HCI_ERROR_REMOTE_USER_TERM;
1064
1065         return l2cap_disconn_ind(conn);
1066 }
1067
1068 /* ----- HCI callbacks ----- */
1069 struct hci_cb {
1070         struct list_head list;
1071
1072         char *name;
1073
1074         void (*connect_cfm)     (struct hci_conn *conn, __u8 status);
1075         void (*disconn_cfm)     (struct hci_conn *conn, __u8 status);
1076         void (*security_cfm)    (struct hci_conn *conn, __u8 status,
1077                                                                 __u8 encrypt);
1078         void (*key_change_cfm)  (struct hci_conn *conn, __u8 status);
1079         void (*role_switch_cfm) (struct hci_conn *conn, __u8 status, __u8 role);
1080 };
1081
1082 static inline void hci_connect_cfm(struct hci_conn *conn, __u8 status)
1083 {
1084         struct hci_cb *cb;
1085
1086         mutex_lock(&hci_cb_list_lock);
1087         list_for_each_entry(cb, &hci_cb_list, list) {
1088                 if (cb->connect_cfm)
1089                         cb->connect_cfm(conn, status);
1090         }
1091         mutex_unlock(&hci_cb_list_lock);
1092
1093         if (conn->connect_cfm_cb)
1094                 conn->connect_cfm_cb(conn, status);
1095 }
1096
1097 static inline void hci_disconn_cfm(struct hci_conn *conn, __u8 reason)
1098 {
1099         struct hci_cb *cb;
1100
1101         mutex_lock(&hci_cb_list_lock);
1102         list_for_each_entry(cb, &hci_cb_list, list) {
1103                 if (cb->disconn_cfm)
1104                         cb->disconn_cfm(conn, reason);
1105         }
1106         mutex_unlock(&hci_cb_list_lock);
1107
1108         if (conn->disconn_cfm_cb)
1109                 conn->disconn_cfm_cb(conn, reason);
1110 }
1111
1112 static inline void hci_auth_cfm(struct hci_conn *conn, __u8 status)
1113 {
1114         struct hci_cb *cb;
1115         __u8 encrypt;
1116
1117         if (test_bit(HCI_CONN_ENCRYPT_PEND, &conn->flags))
1118                 return;
1119
1120         encrypt = test_bit(HCI_CONN_ENCRYPT, &conn->flags) ? 0x01 : 0x00;
1121
1122         mutex_lock(&hci_cb_list_lock);
1123         list_for_each_entry(cb, &hci_cb_list, list) {
1124                 if (cb->security_cfm)
1125                         cb->security_cfm(conn, status, encrypt);
1126         }
1127         mutex_unlock(&hci_cb_list_lock);
1128
1129         if (conn->security_cfm_cb)
1130                 conn->security_cfm_cb(conn, status);
1131 }
1132
1133 static inline void hci_encrypt_cfm(struct hci_conn *conn, __u8 status,
1134                                                                 __u8 encrypt)
1135 {
1136         struct hci_cb *cb;
1137
1138         if (conn->sec_level == BT_SECURITY_SDP)
1139                 conn->sec_level = BT_SECURITY_LOW;
1140
1141         if (conn->pending_sec_level > conn->sec_level)
1142                 conn->sec_level = conn->pending_sec_level;
1143
1144         mutex_lock(&hci_cb_list_lock);
1145         list_for_each_entry(cb, &hci_cb_list, list) {
1146                 if (cb->security_cfm)
1147                         cb->security_cfm(conn, status, encrypt);
1148         }
1149         mutex_unlock(&hci_cb_list_lock);
1150
1151         if (conn->security_cfm_cb)
1152                 conn->security_cfm_cb(conn, status);
1153 }
1154
1155 static inline void hci_key_change_cfm(struct hci_conn *conn, __u8 status)
1156 {
1157         struct hci_cb *cb;
1158
1159         mutex_lock(&hci_cb_list_lock);
1160         list_for_each_entry(cb, &hci_cb_list, list) {
1161                 if (cb->key_change_cfm)
1162                         cb->key_change_cfm(conn, status);
1163         }
1164         mutex_unlock(&hci_cb_list_lock);
1165 }
1166
1167 static inline void hci_role_switch_cfm(struct hci_conn *conn, __u8 status,
1168                                                                 __u8 role)
1169 {
1170         struct hci_cb *cb;
1171
1172         mutex_lock(&hci_cb_list_lock);
1173         list_for_each_entry(cb, &hci_cb_list, list) {
1174                 if (cb->role_switch_cfm)
1175                         cb->role_switch_cfm(conn, status, role);
1176         }
1177         mutex_unlock(&hci_cb_list_lock);
1178 }
1179
1180 static inline bool eir_has_data_type(u8 *data, size_t data_len, u8 type)
1181 {
1182         size_t parsed = 0;
1183
1184         if (data_len < 2)
1185                 return false;
1186
1187         while (parsed < data_len - 1) {
1188                 u8 field_len = data[0];
1189
1190                 if (field_len == 0)
1191                         break;
1192
1193                 parsed += field_len + 1;
1194
1195                 if (parsed > data_len)
1196                         break;
1197
1198                 if (data[1] == type)
1199                         return true;
1200
1201                 data += field_len + 1;
1202         }
1203
1204         return false;
1205 }
1206
1207 static inline bool hci_bdaddr_is_rpa(bdaddr_t *bdaddr, u8 addr_type)
1208 {
1209         if (addr_type != ADDR_LE_DEV_RANDOM)
1210                 return false;
1211
1212         if ((bdaddr->b[5] & 0xc0) == 0x40)
1213                return true;
1214
1215         return false;
1216 }
1217
1218 static inline bool hci_is_identity_address(bdaddr_t *addr, u8 addr_type)
1219 {
1220         if (addr_type == ADDR_LE_DEV_PUBLIC)
1221                 return true;
1222
1223         /* Check for Random Static address type */
1224         if ((addr->b[5] & 0xc0) == 0xc0)
1225                 return true;
1226
1227         return false;
1228 }
1229
1230 static inline struct smp_irk *hci_get_irk(struct hci_dev *hdev,
1231                                           bdaddr_t *bdaddr, u8 addr_type)
1232 {
1233         if (!hci_bdaddr_is_rpa(bdaddr, addr_type))
1234                 return NULL;
1235
1236         return hci_find_irk_by_rpa(hdev, bdaddr);
1237 }
1238
1239 static inline int hci_check_conn_params(u16 min, u16 max, u16 latency,
1240                                         u16 to_multiplier)
1241 {
1242         u16 max_latency;
1243
1244         if (min > max || min < 6 || max > 3200)
1245                 return -EINVAL;
1246
1247         if (to_multiplier < 10 || to_multiplier > 3200)
1248                 return -EINVAL;
1249
1250         if (max >= to_multiplier * 8)
1251                 return -EINVAL;
1252
1253         max_latency = (to_multiplier * 8 / max) - 1;
1254         if (latency > 499 || latency > max_latency)
1255                 return -EINVAL;
1256
1257         return 0;
1258 }
1259
1260 int hci_register_cb(struct hci_cb *hcb);
1261 int hci_unregister_cb(struct hci_cb *hcb);
1262
1263 bool hci_req_pending(struct hci_dev *hdev);
1264
1265 struct sk_buff *__hci_cmd_sync(struct hci_dev *hdev, u16 opcode, u32 plen,
1266                                const void *param, u32 timeout);
1267 struct sk_buff *__hci_cmd_sync_ev(struct hci_dev *hdev, u16 opcode, u32 plen,
1268                                   const void *param, u8 event, u32 timeout);
1269
1270 int hci_send_cmd(struct hci_dev *hdev, __u16 opcode, __u32 plen,
1271                  const void *param);
1272 void hci_send_acl(struct hci_chan *chan, struct sk_buff *skb, __u16 flags);
1273 void hci_send_sco(struct hci_conn *conn, struct sk_buff *skb);
1274
1275 void *hci_sent_cmd_data(struct hci_dev *hdev, __u16 opcode);
1276
1277 /* ----- HCI Sockets ----- */
1278 void hci_send_to_sock(struct hci_dev *hdev, struct sk_buff *skb);
1279 void hci_send_to_channel(unsigned short channel, struct sk_buff *skb,
1280                          struct sock *skip_sk);
1281 void hci_send_to_monitor(struct hci_dev *hdev, struct sk_buff *skb);
1282
1283 void hci_sock_dev_event(struct hci_dev *hdev, int event);
1284
1285 #define HCI_MGMT_VAR_LEN        (1 << 0)
1286 #define HCI_MGMT_NO_HDEV        (1 << 1)
1287 #define HCI_MGMT_UNCONFIGURED   (1 << 2)
1288
1289 struct hci_mgmt_handler {
1290         int (*func) (struct sock *sk, struct hci_dev *hdev, void *data,
1291                      u16 data_len);
1292         size_t data_len;
1293         unsigned long flags;
1294 };
1295
1296 struct hci_mgmt_chan {
1297         struct list_head list;
1298         unsigned short channel;
1299         size_t handler_count;
1300         const struct hci_mgmt_handler *handlers;
1301 };
1302
1303 int hci_mgmt_chan_register(struct hci_mgmt_chan *c);
1304 void hci_mgmt_chan_unregister(struct hci_mgmt_chan *c);
1305
1306 /* Management interface */
1307 #define DISCOV_TYPE_BREDR               (BIT(BDADDR_BREDR))
1308 #define DISCOV_TYPE_LE                  (BIT(BDADDR_LE_PUBLIC) | \
1309                                          BIT(BDADDR_LE_RANDOM))
1310 #define DISCOV_TYPE_INTERLEAVED         (BIT(BDADDR_BREDR) | \
1311                                          BIT(BDADDR_LE_PUBLIC) | \
1312                                          BIT(BDADDR_LE_RANDOM))
1313
1314 /* These LE scan and inquiry parameters were chosen according to LE General
1315  * Discovery Procedure specification.
1316  */
1317 #define DISCOV_LE_SCAN_WIN              0x12
1318 #define DISCOV_LE_SCAN_INT              0x12
1319 #define DISCOV_LE_TIMEOUT               10240   /* msec */
1320 #define DISCOV_INTERLEAVED_TIMEOUT      5120    /* msec */
1321 #define DISCOV_INTERLEAVED_INQUIRY_LEN  0x04
1322 #define DISCOV_BREDR_INQUIRY_LEN        0x08
1323 #define DISCOV_LE_RESTART_DELAY         msecs_to_jiffies(200)   /* msec */
1324
1325 int mgmt_control(struct hci_mgmt_chan *chan, struct sock *sk,
1326                  struct msghdr *msg, size_t msglen);
1327
1328 int mgmt_new_settings(struct hci_dev *hdev);
1329 void mgmt_index_added(struct hci_dev *hdev);
1330 void mgmt_index_removed(struct hci_dev *hdev);
1331 void mgmt_set_powered_failed(struct hci_dev *hdev, int err);
1332 int mgmt_powered(struct hci_dev *hdev, u8 powered);
1333 int mgmt_update_adv_data(struct hci_dev *hdev);
1334 void mgmt_discoverable_timeout(struct hci_dev *hdev);
1335 void mgmt_new_link_key(struct hci_dev *hdev, struct link_key *key,
1336                        bool persistent);
1337 void mgmt_device_connected(struct hci_dev *hdev, struct hci_conn *conn,
1338                            u32 flags, u8 *name, u8 name_len);
1339 void mgmt_device_disconnected(struct hci_dev *hdev, bdaddr_t *bdaddr,
1340                               u8 link_type, u8 addr_type, u8 reason,
1341                               bool mgmt_connected);
1342 void mgmt_disconnect_failed(struct hci_dev *hdev, bdaddr_t *bdaddr,
1343                             u8 link_type, u8 addr_type, u8 status);
1344 void mgmt_connect_failed(struct hci_dev *hdev, bdaddr_t *bdaddr, u8 link_type,
1345                          u8 addr_type, u8 status);
1346 void mgmt_pin_code_request(struct hci_dev *hdev, bdaddr_t *bdaddr, u8 secure);
1347 void mgmt_pin_code_reply_complete(struct hci_dev *hdev, bdaddr_t *bdaddr,
1348                                   u8 status);
1349 void mgmt_pin_code_neg_reply_complete(struct hci_dev *hdev, bdaddr_t *bdaddr,
1350                                       u8 status);
1351 int mgmt_user_confirm_request(struct hci_dev *hdev, bdaddr_t *bdaddr,
1352                               u8 link_type, u8 addr_type, u32 value,
1353                               u8 confirm_hint);
1354 int mgmt_user_confirm_reply_complete(struct hci_dev *hdev, bdaddr_t *bdaddr,
1355                                      u8 link_type, u8 addr_type, u8 status);
1356 int mgmt_user_confirm_neg_reply_complete(struct hci_dev *hdev, bdaddr_t *bdaddr,
1357                                          u8 link_type, u8 addr_type, u8 status);
1358 int mgmt_user_passkey_request(struct hci_dev *hdev, bdaddr_t *bdaddr,
1359                               u8 link_type, u8 addr_type);
1360 int mgmt_user_passkey_reply_complete(struct hci_dev *hdev, bdaddr_t *bdaddr,
1361                                      u8 link_type, u8 addr_type, u8 status);
1362 int mgmt_user_passkey_neg_reply_complete(struct hci_dev *hdev, bdaddr_t *bdaddr,
1363                                          u8 link_type, u8 addr_type, u8 status);
1364 int mgmt_user_passkey_notify(struct hci_dev *hdev, bdaddr_t *bdaddr,
1365                              u8 link_type, u8 addr_type, u32 passkey,
1366                              u8 entered);
1367 void mgmt_auth_failed(struct hci_conn *conn, u8 status);
1368 void mgmt_auth_enable_complete(struct hci_dev *hdev, u8 status);
1369 void mgmt_ssp_enable_complete(struct hci_dev *hdev, u8 enable, u8 status);
1370 void mgmt_set_class_of_dev_complete(struct hci_dev *hdev, u8 *dev_class,
1371                                     u8 status);
1372 void mgmt_set_local_name_complete(struct hci_dev *hdev, u8 *name, u8 status);
1373 void mgmt_read_local_oob_data_complete(struct hci_dev *hdev, u8 *hash192,
1374                                        u8 *rand192, u8 *hash256, u8 *rand256,
1375                                        u8 status);
1376 void mgmt_device_found(struct hci_dev *hdev, bdaddr_t *bdaddr, u8 link_type,
1377                        u8 addr_type, u8 *dev_class, s8 rssi, u32 flags,
1378                        u8 *eir, u16 eir_len, u8 *scan_rsp, u8 scan_rsp_len);
1379 void mgmt_remote_name(struct hci_dev *hdev, bdaddr_t *bdaddr, u8 link_type,
1380                       u8 addr_type, s8 rssi, u8 *name, u8 name_len);
1381 void mgmt_discovering(struct hci_dev *hdev, u8 discovering);
1382 bool mgmt_powering_down(struct hci_dev *hdev);
1383 void mgmt_new_ltk(struct hci_dev *hdev, struct smp_ltk *key, bool persistent);
1384 void mgmt_new_irk(struct hci_dev *hdev, struct smp_irk *irk);
1385 void mgmt_new_csrk(struct hci_dev *hdev, struct smp_csrk *csrk,
1386                    bool persistent);
1387 void mgmt_new_conn_param(struct hci_dev *hdev, bdaddr_t *bdaddr,
1388                          u8 bdaddr_type, u8 store_hint, u16 min_interval,
1389                          u16 max_interval, u16 latency, u16 timeout);
1390 void mgmt_reenable_advertising(struct hci_dev *hdev);
1391 void mgmt_smp_complete(struct hci_conn *conn, bool complete);
1392
1393 u8 hci_le_conn_update(struct hci_conn *conn, u16 min, u16 max, u16 latency,
1394                       u16 to_multiplier);
1395 void hci_le_start_enc(struct hci_conn *conn, __le16 ediv, __le64 rand,
1396                                                         __u8 ltk[16]);
1397
1398 void hci_copy_identity_address(struct hci_dev *hdev, bdaddr_t *bdaddr,
1399                                u8 *bdaddr_type);
1400
1401 #define SCO_AIRMODE_MASK       0x0003
1402 #define SCO_AIRMODE_CVSD       0x0000
1403 #define SCO_AIRMODE_TRANSP     0x0003
1404
1405 #endif /* __HCI_CORE_H */