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 };
  79
  80 struct hci_conn_hash {
  81         struct list_head list;
  82         unsigned int     acl_num;
  83         unsigned int     amp_num;
  84         unsigned int     sco_num;
  85         unsigned int     le_num;
  86         unsigned int     le_num_slave;
  87 };
  88
  89 struct bdaddr_list {
  90         struct list_head list;
  91         bdaddr_t bdaddr;
  92         u8 bdaddr_type;
  93 };
  94
  95 struct bt_uuid {
  96         struct list_head list;
  97         u8 uuid[16];
  98         u8 size;
  99         u8 svc_hint;
 100 };
 101
 102 struct smp_csrk {
 103         bdaddr_t bdaddr;
 104         u8 bdaddr_type;
 105         u8 master;
 106         u8 val[16];
 107 };
 108
 109 struct smp_ltk {
 110         struct list_head list;
 111         bdaddr_t bdaddr;
 112         u8 bdaddr_type;
 113         u8 authenticated;
 114         u8 type;
 115         u8 enc_size;
 116         __le16 ediv;
 117         __le64 rand;
 118         u8 val[16];
 119 };
 120
 121 struct smp_irk {
 122         struct list_head list;
 123         bdaddr_t rpa;
 124         bdaddr_t bdaddr;
 125         u8 addr_type;
 126         u8 val[16];
 127 };
 128
 129 struct link_key {
 130         struct list_head list;
 131         bdaddr_t bdaddr;
 132         u8 type;
 133         u8 val[HCI_LINK_KEY_SIZE];
 134         u8 pin_len;
 135 };
 136
 137 struct oob_data {
 138         struct list_head list;
 139         bdaddr_t bdaddr;
 140         u8 hash192[16];
 141         u8 randomizer192[16];
 142         u8 hash256[16];
 143         u8 randomizer256[16];
 144 };
 145
 146 #define HCI_MAX_SHORT_NAME_LENGTH       10
 147
 148 /* Default LE RPA expiry time, 15 minutes */
 149 #define HCI_DEFAULT_RPA_TIMEOUT         (15 * 60)
 150
 151 /* Default min/max age of connection information (1s/3s) */
 152 #define DEFAULT_CONN_INFO_MIN_AGE       1000
 153 #define DEFAULT_CONN_INFO_MAX_AGE       3000
 154
 155 struct amp_assoc {
 156         __u16   len;
 157         __u16   offset;
 158         __u16   rem_len;
 159         __u16   len_so_far;
 160         __u8    data[HCI_MAX_AMP_ASSOC_SIZE];
 161 };
 162
 163 #define HCI_MAX_PAGES   3
 164
 165 #define NUM_REASSEMBLY 4
 166 struct hci_dev {
 167         struct list_head list;
 168         struct mutex    lock;
 169
 170         char            name[8];
 171         unsigned long   flags;
 172         __u16           id;
 173         __u8            bus;
 174         __u8            dev_type;
 175         bdaddr_t        bdaddr;
 176         bdaddr_t        setup_addr;
 177         bdaddr_t        public_addr;
 178         bdaddr_t        random_addr;
 179         bdaddr_t        static_addr;
 180         __u8            adv_addr_type;
 181         __u8            dev_name[HCI_MAX_NAME_LENGTH];
 182         __u8            short_name[HCI_MAX_SHORT_NAME_LENGTH];
 183         __u8            eir[HCI_MAX_EIR_LENGTH];
 184         __u8            dev_class[3];
 185         __u8            major_class;
 186         __u8            minor_class;
 187         __u8            max_page;
 188         __u8            features[HCI_MAX_PAGES][8];
 189         __u8            le_features[8];
 190         __u8            le_white_list_size;
 191         __u8            le_states[8];
 192         __u8            commands[64];
 193         __u8            hci_ver;
 194         __u16           hci_rev;
 195         __u8            lmp_ver;
 196         __u16           manufacturer;
 197         __u16           lmp_subver;
 198         __u16           voice_setting;
 199         __u8            num_iac;
 200         __u8            io_capability;
 201         __s8            inq_tx_power;
 202         __u16           page_scan_interval;
 203         __u16           page_scan_window;
 204         __u8            page_scan_type;
 205         __u8            le_adv_channel_map;
 206         __u16           le_adv_min_interval;
 207         __u16           le_adv_max_interval;
 208         __u8            le_scan_type;
 209         __u16           le_scan_interval;
 210         __u16           le_scan_window;
 211         __u16           le_conn_min_interval;
 212         __u16           le_conn_max_interval;
 213         __u16           le_conn_latency;
 214         __u16           le_supv_timeout;
 215         __u16           discov_interleaved_timeout;
 216         __u16           conn_info_min_age;
 217         __u16           conn_info_max_age;
 218         __u8            ssp_debug_mode;
 219         __u32           clock;
 220
 221         __u16           devid_source;
 222         __u16           devid_vendor;
 223         __u16           devid_product;
 224         __u16           devid_version;
 225
 226         __u16           pkt_type;
 227         __u16           esco_type;
 228         __u16           link_policy;
 229         __u16           link_mode;
 230
 231         __u32           idle_timeout;
 232         __u16           sniff_min_interval;
 233         __u16           sniff_max_interval;
 234
 235         __u8            amp_status;
 236         __u32           amp_total_bw;
 237         __u32           amp_max_bw;
 238         __u32           amp_min_latency;
 239         __u32           amp_max_pdu;
 240         __u8            amp_type;
 241         __u16           amp_pal_cap;
 242         __u16           amp_assoc_size;
 243         __u32           amp_max_flush_to;
 244         __u32           amp_be_flush_to;
 245
 246         struct amp_assoc        loc_assoc;
 247
 248         __u8            flow_ctl_mode;
 249
 250         unsigned int    auto_accept_delay;
 251
 252         unsigned long   quirks;
 253
 254         atomic_t        cmd_cnt;
 255         unsigned int    acl_cnt;
 256         unsigned int    sco_cnt;
 257         unsigned int    le_cnt;
 258
 259         unsigned int    acl_mtu;
 260         unsigned int    sco_mtu;
 261         unsigned int    le_mtu;
 262         unsigned int    acl_pkts;
 263         unsigned int    sco_pkts;
 264         unsigned int    le_pkts;
 265
 266         __u16           block_len;
 267         __u16           block_mtu;
 268         __u16           num_blocks;
 269         __u16           block_cnt;
 270
 271         unsigned long   acl_last_tx;
 272         unsigned long   sco_last_tx;
 273         unsigned long   le_last_tx;
 274
 275         struct workqueue_struct *workqueue;
 276         struct workqueue_struct *req_workqueue;
 277
 278         struct work_struct      power_on;
 279         struct delayed_work     power_off;
 280
 281         __u16                   discov_timeout;
 282         struct delayed_work     discov_off;
 283
 284         struct delayed_work     service_cache;
 285
 286         struct delayed_work     cmd_timer;
 287
 288         struct work_struct      rx_work;
 289         struct work_struct      cmd_work;
 290         struct work_struct      tx_work;
 291
 292         struct sk_buff_head     rx_q;
 293         struct sk_buff_head     raw_q;
 294         struct sk_buff_head     cmd_q;
 295
 296         struct sk_buff          *recv_evt;
 297         struct sk_buff          *sent_cmd;
 298         struct sk_buff          *reassembly[NUM_REASSEMBLY];
 299
 300         struct mutex            req_lock;
 301         wait_queue_head_t       req_wait_q;
 302         __u32                   req_status;
 303         __u32                   req_result;
 304
 305         void                    *smp_data;
 306
 307         struct discovery_state  discovery;
 308         struct hci_conn_hash    conn_hash;
 309
 310         struct list_head        mgmt_pending;
 311         struct list_head        blacklist;
 312         struct list_head        whitelist;
 313         struct list_head        uuids;
 314         struct list_head        link_keys;
 315         struct list_head        long_term_keys;
 316         struct list_head        identity_resolving_keys;
 317         struct list_head        remote_oob_data;
 318         struct list_head        le_white_list;
 319         struct list_head        le_conn_params;
 320         struct list_head        pend_le_conns;
 321         struct list_head        pend_le_reports;
 322
 323         struct hci_dev_stats    stat;
 324
 325         atomic_t                promisc;
 326
 327         struct dentry           *debugfs;
 328
 329         struct device           dev;
 330
 331         struct rfkill           *rfkill;
 332
 333         unsigned long           dbg_flags;
 334         unsigned long           dev_flags;
 335
 336         struct delayed_work     le_scan_disable;
 337
 338         __s8                    adv_tx_power;
 339         __u8                    adv_data[HCI_MAX_AD_LENGTH];
 340         __u8                    adv_data_len;
 341         __u8                    scan_rsp_data[HCI_MAX_AD_LENGTH];
 342         __u8                    scan_rsp_data_len;
 343
 344         __u8                    irk[16];
 345         __u32                   rpa_timeout;
 346         struct delayed_work     rpa_expired;
 347         bdaddr_t                rpa;
 348
 349         int (*open)(struct hci_dev *hdev);
 350         int (*close)(struct hci_dev *hdev);
 351         int (*flush)(struct hci_dev *hdev);
 352         int (*setup)(struct hci_dev *hdev);
 353         int (*send)(struct hci_dev *hdev, struct sk_buff *skb);
 354         void (*notify)(struct hci_dev *hdev, unsigned int evt);
 355         int (*set_bdaddr)(struct hci_dev *hdev, const bdaddr_t *bdaddr);
 356 };
 357
 358 #define HCI_PHY_HANDLE(handle)  (handle & 0xff)
 359
 360 struct hci_conn {
 361         struct list_head list;
 362
 363         atomic_t        refcnt;
 364
 365         bdaddr_t        dst;
 366         __u8            dst_type;
 367         bdaddr_t        src;
 368         __u8            src_type;
 369         bdaddr_t        init_addr;
 370         __u8            init_addr_type;
 371         bdaddr_t        resp_addr;
 372         __u8            resp_addr_type;
 373         __u16           handle;
 374         __u16           state;
 375         __u8            mode;
 376         __u8            type;
 377         __u8            role;
 378         bool            out;
 379         __u8            attempt;
 380         __u8            dev_class[3];
 381         __u8            features[HCI_MAX_PAGES][8];
 382         __u16           pkt_type;
 383         __u16           link_policy;
 384         __u8            key_type;
 385         __u8            auth_type;
 386         __u8            sec_level;
 387         __u8            pending_sec_level;
 388         __u8            pin_length;
 389         __u8            enc_key_size;
 390         __u8            io_capability;
 391         __u32           passkey_notify;
 392         __u8            passkey_entered;
 393         __u16           disc_timeout;
 394         __u16           conn_timeout;
 395         __u16           setting;
 396         __u16           le_conn_min_interval;
 397         __u16           le_conn_max_interval;
 398         __u16           le_conn_interval;
 399         __u16           le_conn_latency;
 400         __u16           le_supv_timeout;
 401         __s8            rssi;
 402         __s8            tx_power;
 403         __s8            max_tx_power;
 404         unsigned long   flags;
 405
 406         __u32           clock;
 407         __u16           clock_accuracy;
 408
 409         unsigned long   conn_info_timestamp;
 410
 411         __u8            remote_cap;
 412         __u8            remote_auth;
 413         __u8            remote_id;
 414
 415         unsigned int    sent;
 416
 417         struct sk_buff_head data_q;
 418         struct list_head chan_list;
 419
 420         struct delayed_work disc_work;
 421         struct delayed_work auto_accept_work;
 422         struct delayed_work idle_work;
 423         struct delayed_work le_conn_timeout;
 424
 425         struct device   dev;
 426
 427         struct hci_dev  *hdev;
 428         void            *l2cap_data;
 429         void            *sco_data;
 430         struct amp_mgr  *amp_mgr;
 431
 432         struct hci_conn *link;
 433
 434         void (*connect_cfm_cb)  (struct hci_conn *conn, u8 status);
 435         void (*security_cfm_cb) (struct hci_conn *conn, u8 status);
 436         void (*disconn_cfm_cb)  (struct hci_conn *conn, u8 reason);
 437 };
 438
 439 struct hci_chan {
 440         struct list_head list;
 441         __u16 handle;
 442         struct hci_conn *conn;
 443         struct sk_buff_head data_q;
 444         unsigned int    sent;
 445         __u8            state;
 446 };
 447
 448 struct hci_conn_params {
 449         struct list_head list;
 450         struct list_head action;
 451
 452         bdaddr_t addr;
 453         u8 addr_type;
 454
 455         u16 conn_min_interval;
 456         u16 conn_max_interval;
 457         u16 conn_latency;
 458         u16 supervision_timeout;
 459
 460         enum {
 461                 HCI_AUTO_CONN_DISABLED,
 462                 HCI_AUTO_CONN_REPORT,
 463                 HCI_AUTO_CONN_DIRECT,
 464                 HCI_AUTO_CONN_ALWAYS,
 465                 HCI_AUTO_CONN_LINK_LOSS,
 466         } auto_connect;
 467
 468         struct hci_conn *conn;
 469 };
 470
 471 extern struct list_head hci_dev_list;
 472 extern struct list_head hci_cb_list;
 473 extern rwlock_t hci_dev_list_lock;
 474 extern rwlock_t hci_cb_list_lock;
 475
 476 /* ----- HCI interface to upper protocols ----- */
 477 int l2cap_connect_ind(struct hci_dev *hdev, bdaddr_t *bdaddr);
 478 void l2cap_connect_cfm(struct hci_conn *hcon, u8 status);
 479 int l2cap_disconn_ind(struct hci_conn *hcon);
 480 void l2cap_disconn_cfm(struct hci_conn *hcon, u8 reason);
 481 int l2cap_security_cfm(struct hci_conn *hcon, u8 status, u8 encrypt);
 482 int l2cap_recv_acldata(struct hci_conn *hcon, struct sk_buff *skb, u16 flags);
 483
 484 int sco_connect_ind(struct hci_dev *hdev, bdaddr_t *bdaddr, __u8 *flags);
 485 void sco_connect_cfm(struct hci_conn *hcon, __u8 status);
 486 void sco_disconn_cfm(struct hci_conn *hcon, __u8 reason);
 487 int sco_recv_scodata(struct hci_conn *hcon, struct sk_buff *skb);
 488
 489 /* ----- Inquiry cache ----- */
 490 #define INQUIRY_CACHE_AGE_MAX   (HZ*30)   /* 30 seconds */
 491 #define INQUIRY_ENTRY_AGE_MAX   (HZ*60)   /* 60 seconds */
 492
 493 static inline void discovery_init(struct hci_dev *hdev)
 494 {
 495         hdev->discovery.state = DISCOVERY_STOPPED;
 496         INIT_LIST_HEAD(&hdev->discovery.all);
 497         INIT_LIST_HEAD(&hdev->discovery.unknown);
 498         INIT_LIST_HEAD(&hdev->discovery.resolve);
 499 }
 500
 501 bool hci_discovery_active(struct hci_dev *hdev);
 502
 503 void hci_discovery_set_state(struct hci_dev *hdev, int state);
 504
 505 static inline int inquiry_cache_empty(struct hci_dev *hdev)
 506 {
 507         return list_empty(&hdev->discovery.all);
 508 }
 509
 510 static inline long inquiry_cache_age(struct hci_dev *hdev)
 511 {
 512         struct discovery_state *c = &hdev->discovery;
 513         return jiffies - c->timestamp;
 514 }
 515
 516 static inline long inquiry_entry_age(struct inquiry_entry *e)
 517 {
 518         return jiffies - e->timestamp;
 519 }
 520
 521 struct inquiry_entry *hci_inquiry_cache_lookup(struct hci_dev *hdev,
 522                                                bdaddr_t *bdaddr);
 523 struct inquiry_entry *hci_inquiry_cache_lookup_unknown(struct hci_dev *hdev,
 524                                                        bdaddr_t *bdaddr);
 525 struct inquiry_entry *hci_inquiry_cache_lookup_resolve(struct hci_dev *hdev,
 526                                                        bdaddr_t *bdaddr,
 527                                                        int state);
 528 void hci_inquiry_cache_update_resolve(struct hci_dev *hdev,
 529                                       struct inquiry_entry *ie);
 530 u32 hci_inquiry_cache_update(struct hci_dev *hdev, struct inquiry_data *data,
 531                              bool name_known);
 532 void hci_inquiry_cache_flush(struct hci_dev *hdev);
 533
 534 /* ----- HCI Connections ----- */
 535 enum {
 536         HCI_CONN_AUTH_PEND,
 537         HCI_CONN_REAUTH_PEND,
 538         HCI_CONN_ENCRYPT_PEND,
 539         HCI_CONN_RSWITCH_PEND,
 540         HCI_CONN_MODE_CHANGE_PEND,
 541         HCI_CONN_SCO_SETUP_PEND,
 542         HCI_CONN_MGMT_CONNECTED,
 543         HCI_CONN_SSP_ENABLED,
 544         HCI_CONN_SC_ENABLED,
 545         HCI_CONN_AES_CCM,
 546         HCI_CONN_POWER_SAVE,
 547         HCI_CONN_REMOTE_OOB,
 548         HCI_CONN_FLUSH_KEY,
 549         HCI_CONN_ENCRYPT,
 550         HCI_CONN_AUTH,
 551         HCI_CONN_SECURE,
 552         HCI_CONN_FIPS,
 553         HCI_CONN_STK_ENCRYPT,
 554         HCI_CONN_AUTH_INITIATOR,
 555         HCI_CONN_DROP,
 556 };
 557
 558 static inline bool hci_conn_ssp_enabled(struct hci_conn *conn)
 559 {
 560         struct hci_dev *hdev = conn->hdev;
 561         return test_bit(HCI_SSP_ENABLED, &hdev->dev_flags) &&
 562                test_bit(HCI_CONN_SSP_ENABLED, &conn->flags);
 563 }
 564
 565 static inline bool hci_conn_sc_enabled(struct hci_conn *conn)
 566 {
 567         struct hci_dev *hdev = conn->hdev;
 568         return test_bit(HCI_SC_ENABLED, &hdev->dev_flags) &&
 569                test_bit(HCI_CONN_SC_ENABLED, &conn->flags);
 570 }
 571
 572 static inline void hci_conn_hash_add(struct hci_dev *hdev, struct hci_conn *c)
 573 {
 574         struct hci_conn_hash *h = &hdev->conn_hash;
 575         list_add_rcu(&c->list, &h->list);
 576         switch (c->type) {
 577         case ACL_LINK:
 578                 h->acl_num++;
 579                 break;
 580         case AMP_LINK:
 581                 h->amp_num++;
 582                 break;
 583         case LE_LINK:
 584                 h->le_num++;
 585                 if (c->role == HCI_ROLE_SLAVE)
 586                         h->le_num_slave++;
 587                 break;
 588         case SCO_LINK:
 589         case ESCO_LINK:
 590                 h->sco_num++;
 591                 break;
 592         }
 593 }
 594
 595 static inline void hci_conn_hash_del(struct hci_dev *hdev, struct hci_conn *c)
 596 {
 597         struct hci_conn_hash *h = &hdev->conn_hash;
 598
 599         list_del_rcu(&c->list);
 600         synchronize_rcu();
 601
 602         switch (c->type) {
 603         case ACL_LINK:
 604                 h->acl_num--;
 605                 break;
 606         case AMP_LINK:
 607                 h->amp_num--;
 608                 break;
 609         case LE_LINK:
 610                 h->le_num--;
 611                 if (c->role == HCI_ROLE_SLAVE)
 612                         h->le_num_slave--;
 613                 break;
 614         case SCO_LINK:
 615         case ESCO_LINK:
 616                 h->sco_num--;
 617                 break;
 618         }
 619 }
 620
 621 static inline unsigned int hci_conn_num(struct hci_dev *hdev, __u8 type)
 622 {
 623         struct hci_conn_hash *h = &hdev->conn_hash;
 624         switch (type) {
 625         case ACL_LINK:
 626                 return h->acl_num;
 627         case AMP_LINK:
 628                 return h->amp_num;
 629         case LE_LINK:
 630                 return h->le_num;
 631         case SCO_LINK:
 632         case ESCO_LINK:
 633                 return h->sco_num;
 634         default:
 635                 return 0;
 636         }
 637 }
 638
 639 static inline unsigned int hci_conn_count(struct hci_dev *hdev)
 640 {
 641         struct hci_conn_hash *c = &hdev->conn_hash;
 642
 643         return c->acl_num + c->amp_num + c->sco_num + c->le_num;
 644 }
 645
 646 static inline struct hci_conn *hci_conn_hash_lookup_handle(struct hci_dev *hdev,
 647                                                                 __u16 handle)
 648 {
 649         struct hci_conn_hash *h = &hdev->conn_hash;
 650         struct hci_conn  *c;
 651
 652         rcu_read_lock();
 653
 654         list_for_each_entry_rcu(c, &h->list, list) {
 655                 if (c->handle == handle) {
 656                         rcu_read_unlock();
 657                         return c;
 658                 }
 659         }
 660         rcu_read_unlock();
 661
 662         return NULL;
 663 }
 664
 665 static inline struct hci_conn *hci_conn_hash_lookup_ba(struct hci_dev *hdev,
 666                                                         __u8 type, bdaddr_t *ba)
 667 {
 668         struct hci_conn_hash *h = &hdev->conn_hash;
 669         struct hci_conn  *c;
 670
 671         rcu_read_lock();
 672
 673         list_for_each_entry_rcu(c, &h->list, list) {
 674                 if (c->type == type && !bacmp(&c->dst, ba)) {
 675                         rcu_read_unlock();
 676                         return c;
 677                 }
 678         }
 679
 680         rcu_read_unlock();
 681
 682         return NULL;
 683 }
 684
 685 static inline struct hci_conn *hci_conn_hash_lookup_state(struct hci_dev *hdev,
 686                                                         __u8 type, __u16 state)
 687 {
 688         struct hci_conn_hash *h = &hdev->conn_hash;
 689         struct hci_conn  *c;
 690
 691         rcu_read_lock();
 692
 693         list_for_each_entry_rcu(c, &h->list, list) {
 694                 if (c->type == type && c->state == state) {
 695                         rcu_read_unlock();
 696                         return c;
 697                 }
 698         }
 699
 700         rcu_read_unlock();
 701
 702         return NULL;
 703 }
 704
 705 int hci_disconnect(struct hci_conn *conn, __u8 reason);
 706 bool hci_setup_sync(struct hci_conn *conn, __u16 handle);
 707 void hci_sco_setup(struct hci_conn *conn, __u8 status);
 708
 709 struct hci_conn *hci_conn_add(struct hci_dev *hdev, int type, bdaddr_t *dst,
 710                               u8 role);
 711 int hci_conn_del(struct hci_conn *conn);
 712 void hci_conn_hash_flush(struct hci_dev *hdev);
 713 void hci_conn_check_pending(struct hci_dev *hdev);
 714
 715 struct hci_chan *hci_chan_create(struct hci_conn *conn);
 716 void hci_chan_del(struct hci_chan *chan);
 717 void hci_chan_list_flush(struct hci_conn *conn);
 718 struct hci_chan *hci_chan_lookup_handle(struct hci_dev *hdev, __u16 handle);
 719
 720 struct hci_conn *hci_connect_le(struct hci_dev *hdev, bdaddr_t *dst,
 721                                 u8 dst_type, u8 sec_level, u16 conn_timeout,
 722                                 u8 role);
 723 struct hci_conn *hci_connect_acl(struct hci_dev *hdev, bdaddr_t *dst,
 724                                  u8 sec_level, u8 auth_type);
 725 struct hci_conn *hci_connect_sco(struct hci_dev *hdev, int type, bdaddr_t *dst,
 726                                  __u16 setting);
 727 int hci_conn_check_link_mode(struct hci_conn *conn);
 728 int hci_conn_check_secure(struct hci_conn *conn, __u8 sec_level);
 729 int hci_conn_security(struct hci_conn *conn, __u8 sec_level, __u8 auth_type,
 730                       bool initiator);
 731 int hci_conn_change_link_key(struct hci_conn *conn);
 732 int hci_conn_switch_role(struct hci_conn *conn, __u8 role);
 733
 734 void hci_conn_enter_active_mode(struct hci_conn *conn, __u8 force_active);
 735
 736 void hci_le_conn_failed(struct hci_conn *conn, u8 status);
 737
 738 /*
 739  * hci_conn_get() and hci_conn_put() are used to control the life-time of an
 740  * "hci_conn" object. They do not guarantee that the hci_conn object is running,
 741  * working or anything else. They just guarantee that the object is available
 742  * and can be dereferenced. So you can use its locks, local variables and any
 743  * other constant data.
 744  * Before accessing runtime data, you _must_ lock the object and then check that
 745  * it is still running. As soon as you release the locks, the connection might
 746  * get dropped, though.
 747  *
 748  * On the other hand, hci_conn_hold() and hci_conn_drop() are used to control
 749  * how long the underlying connection is held. So every channel that runs on the
 750  * hci_conn object calls this to prevent the connection from disappearing. As
 751  * long as you hold a device, you must also guarantee that you have a valid
 752  * reference to the device via hci_conn_get() (or the initial reference from
 753  * hci_conn_add()).
 754  * The hold()/drop() ref-count is known to drop below 0 sometimes, which doesn't
 755  * break because nobody cares for that. But this means, we cannot use
 756  * _get()/_drop() in it, but require the caller to have a valid ref (FIXME).
 757  */
 758
 759 static inline struct hci_conn *hci_conn_get(struct hci_conn *conn)
 760 {
 761         get_device(&conn->dev);
 762         return conn;
 763 }
 764
 765 static inline void hci_conn_put(struct hci_conn *conn)
 766 {
 767         put_device(&conn->dev);
 768 }
 769
 770 static inline void hci_conn_hold(struct hci_conn *conn)
 771 {
 772         BT_DBG("hcon %p orig refcnt %d", conn, atomic_read(&conn->refcnt));
 773
 774         atomic_inc(&conn->refcnt);
 775         cancel_delayed_work(&conn->disc_work);
 776 }
 777
 778 static inline void hci_conn_drop(struct hci_conn *conn)
 779 {
 780         BT_DBG("hcon %p orig refcnt %d", conn, atomic_read(&conn->refcnt));
 781
 782         if (atomic_dec_and_test(&conn->refcnt)) {
 783                 unsigned long timeo;
 784
 785                 switch (conn->type) {
 786                 case ACL_LINK:
 787                 case LE_LINK:
 788                         cancel_delayed_work(&conn->idle_work);
 789                         if (conn->state == BT_CONNECTED) {
 790                                 timeo = conn->disc_timeout;
 791                                 if (!conn->out)
 792                                         timeo *= 2;
 793                         } else {
 794                                 timeo = 0;
 795                         }
 796                         break;
 797
 798                 case AMP_LINK:
 799                         timeo = conn->disc_timeout;
 800                         break;
 801
 802                 default:
 803                         timeo = 0;
 804                         break;
 805                 }
 806
 807                 cancel_delayed_work(&conn->disc_work);
 808                 queue_delayed_work(conn->hdev->workqueue,
 809                                    &conn->disc_work, timeo);
 810         }
 811 }
 812
 813 /* ----- HCI Devices ----- */
 814 static inline void hci_dev_put(struct hci_dev *d)
 815 {
 816         BT_DBG("%s orig refcnt %d", d->name,
 817                atomic_read(&d->dev.kobj.kref.refcount));
 818
 819         put_device(&d->dev);
 820 }
 821
 822 static inline struct hci_dev *hci_dev_hold(struct hci_dev *d)
 823 {
 824         BT_DBG("%s orig refcnt %d", d->name,
 825                atomic_read(&d->dev.kobj.kref.refcount));
 826
 827         get_device(&d->dev);
 828         return d;
 829 }
 830
 831 #define hci_dev_lock(d)         mutex_lock(&d->lock)
 832 #define hci_dev_unlock(d)       mutex_unlock(&d->lock)
 833
 834 #define to_hci_dev(d) container_of(d, struct hci_dev, dev)
 835 #define to_hci_conn(c) container_of(c, struct hci_conn, dev)
 836
 837 static inline void *hci_get_drvdata(struct hci_dev *hdev)
 838 {
 839         return dev_get_drvdata(&hdev->dev);
 840 }
 841
 842 static inline void hci_set_drvdata(struct hci_dev *hdev, void *data)
 843 {
 844         dev_set_drvdata(&hdev->dev, data);
 845 }
 846
 847 struct hci_dev *hci_dev_get(int index);
 848 struct hci_dev *hci_get_route(bdaddr_t *dst, bdaddr_t *src);
 849
 850 struct hci_dev *hci_alloc_dev(void);
 851 void hci_free_dev(struct hci_dev *hdev);
 852 int hci_register_dev(struct hci_dev *hdev);
 853 void hci_unregister_dev(struct hci_dev *hdev);
 854 int hci_suspend_dev(struct hci_dev *hdev);
 855 int hci_resume_dev(struct hci_dev *hdev);
 856 int hci_dev_open(__u16 dev);
 857 int hci_dev_close(__u16 dev);
 858 int hci_dev_reset(__u16 dev);
 859 int hci_dev_reset_stat(__u16 dev);
 860 int hci_dev_cmd(unsigned int cmd, void __user *arg);
 861 int hci_get_dev_list(void __user *arg);
 862 int hci_get_dev_info(void __user *arg);
 863 int hci_get_conn_list(void __user *arg);
 864 int hci_get_conn_info(struct hci_dev *hdev, void __user *arg);
 865 int hci_get_auth_info(struct hci_dev *hdev, void __user *arg);
 866 int hci_inquiry(void __user *arg);
 867
 868 struct bdaddr_list *hci_bdaddr_list_lookup(struct list_head *list,
 869                                            bdaddr_t *bdaddr, u8 type);
 870 int hci_bdaddr_list_add(struct list_head *list, bdaddr_t *bdaddr, u8 type);
 871 int hci_bdaddr_list_del(struct list_head *list, bdaddr_t *bdaddr, u8 type);
 872 void hci_bdaddr_list_clear(struct list_head *list);
 873
 874 struct hci_conn_params *hci_conn_params_lookup(struct hci_dev *hdev,
 875                                                bdaddr_t *addr, u8 addr_type);
 876 struct hci_conn_params *hci_conn_params_add(struct hci_dev *hdev,
 877                                             bdaddr_t *addr, u8 addr_type);
 878 int hci_conn_params_set(struct hci_dev *hdev, bdaddr_t *addr, u8 addr_type,
 879                         u8 auto_connect);
 880 void hci_conn_params_del(struct hci_dev *hdev, bdaddr_t *addr, u8 addr_type);
 881 void hci_conn_params_clear_all(struct hci_dev *hdev);
 882 void hci_conn_params_clear_disabled(struct hci_dev *hdev);
 883
 884 struct hci_conn_params *hci_pend_le_action_lookup(struct list_head *list,
 885                                                   bdaddr_t *addr,
 886                                                   u8 addr_type);
 887
 888 void hci_update_background_scan(struct hci_dev *hdev);
 889
 890 void hci_uuids_clear(struct hci_dev *hdev);
 891
 892 void hci_link_keys_clear(struct hci_dev *hdev);
 893 struct link_key *hci_find_link_key(struct hci_dev *hdev, bdaddr_t *bdaddr);
 894 struct link_key *hci_add_link_key(struct hci_dev *hdev, struct hci_conn *conn,
 895                                   bdaddr_t *bdaddr, u8 *val, u8 type,
 896                                   u8 pin_len, bool *persistent);
 897 struct smp_ltk *hci_find_ltk(struct hci_dev *hdev, __le16 ediv, __le64 rand,
 898                              u8 role);
 899 struct smp_ltk *hci_add_ltk(struct hci_dev *hdev, bdaddr_t *bdaddr,
 900                             u8 addr_type, u8 type, u8 authenticated,
 901                             u8 tk[16], u8 enc_size, __le16 ediv, __le64 rand);
 902 struct smp_ltk *hci_find_ltk_by_addr(struct hci_dev *hdev, bdaddr_t *bdaddr,
 903                                      u8 addr_type, u8 role);
 904 int hci_remove_ltk(struct hci_dev *hdev, bdaddr_t *bdaddr, u8 bdaddr_type);
 905 void hci_smp_ltks_clear(struct hci_dev *hdev);
 906 int hci_remove_link_key(struct hci_dev *hdev, bdaddr_t *bdaddr);
 907
 908 struct smp_irk *hci_find_irk_by_rpa(struct hci_dev *hdev, bdaddr_t *rpa);
 909 struct smp_irk *hci_find_irk_by_addr(struct hci_dev *hdev, bdaddr_t *bdaddr,
 910                                      u8 addr_type);
 911 struct smp_irk *hci_add_irk(struct hci_dev *hdev, bdaddr_t *bdaddr,
 912                             u8 addr_type, u8 val[16], bdaddr_t *rpa);
 913 void hci_remove_irk(struct hci_dev *hdev, bdaddr_t *bdaddr, u8 addr_type);
 914 void hci_smp_irks_clear(struct hci_dev *hdev);
 915
 916 void hci_remote_oob_data_clear(struct hci_dev *hdev);
 917 struct oob_data *hci_find_remote_oob_data(struct hci_dev *hdev,
 918                                           bdaddr_t *bdaddr);
 919 int hci_add_remote_oob_data(struct hci_dev *hdev, bdaddr_t *bdaddr,
 920                             u8 *hash, u8 *randomizer);
 921 int hci_add_remote_oob_ext_data(struct hci_dev *hdev, bdaddr_t *bdaddr,
 922                                 u8 *hash192, u8 *randomizer192,
 923                                 u8 *hash256, u8 *randomizer256);
 924 int hci_remove_remote_oob_data(struct hci_dev *hdev, bdaddr_t *bdaddr);
 925
 926 void hci_event_packet(struct hci_dev *hdev, struct sk_buff *skb);
 927
 928 int hci_recv_frame(struct hci_dev *hdev, struct sk_buff *skb);
 929 int hci_recv_stream_fragment(struct hci_dev *hdev, void *data, int count);
 930
 931 void hci_init_sysfs(struct hci_dev *hdev);
 932 void hci_conn_init_sysfs(struct hci_conn *conn);
 933 void hci_conn_add_sysfs(struct hci_conn *conn);
 934 void hci_conn_del_sysfs(struct hci_conn *conn);
 935
 936 #define SET_HCIDEV_DEV(hdev, pdev) ((hdev)->dev.parent = (pdev))
 937
 938 /* ----- LMP capabilities ----- */
 939 #define lmp_encrypt_capable(dev)   ((dev)->features[0][0] & LMP_ENCRYPT)
 940 #define lmp_rswitch_capable(dev)   ((dev)->features[0][0] & LMP_RSWITCH)
 941 #define lmp_hold_capable(dev)      ((dev)->features[0][0] & LMP_HOLD)
 942 #define lmp_sniff_capable(dev)     ((dev)->features[0][0] & LMP_SNIFF)
 943 #define lmp_park_capable(dev)      ((dev)->features[0][1] & LMP_PARK)
 944 #define lmp_inq_rssi_capable(dev)  ((dev)->features[0][3] & LMP_RSSI_INQ)
 945 #define lmp_esco_capable(dev)      ((dev)->features[0][3] & LMP_ESCO)
 946 #define lmp_bredr_capable(dev)     (!((dev)->features[0][4] & LMP_NO_BREDR))
 947 #define lmp_le_capable(dev)        ((dev)->features[0][4] & LMP_LE)
 948 #define lmp_sniffsubr_capable(dev) ((dev)->features[0][5] & LMP_SNIFF_SUBR)
 949 #define lmp_pause_enc_capable(dev) ((dev)->features[0][5] & LMP_PAUSE_ENC)
 950 #define lmp_ext_inq_capable(dev)   ((dev)->features[0][6] & LMP_EXT_INQ)
 951 #define lmp_le_br_capable(dev)     (!!((dev)->features[0][6] & LMP_SIMUL_LE_BR))
 952 #define lmp_ssp_capable(dev)       ((dev)->features[0][6] & LMP_SIMPLE_PAIR)
 953 #define lmp_no_flush_capable(dev)  ((dev)->features[0][6] & LMP_NO_FLUSH)
 954 #define lmp_lsto_capable(dev)      ((dev)->features[0][7] & LMP_LSTO)
 955 #define lmp_inq_tx_pwr_capable(dev) ((dev)->features[0][7] & LMP_INQ_TX_PWR)
 956 #define lmp_ext_feat_capable(dev)  ((dev)->features[0][7] & LMP_EXTFEATURES)
 957 #define lmp_transp_capable(dev)    ((dev)->features[0][2] & LMP_TRANSPARENT)
 958
 959 /* ----- Extended LMP capabilities ----- */
 960 #define lmp_csb_master_capable(dev) ((dev)->features[2][0] & LMP_CSB_MASTER)
 961 #define lmp_csb_slave_capable(dev)  ((dev)->features[2][0] & LMP_CSB_SLAVE)
 962 #define lmp_sync_train_capable(dev) ((dev)->features[2][0] & LMP_SYNC_TRAIN)
 963 #define lmp_sync_scan_capable(dev)  ((dev)->features[2][0] & LMP_SYNC_SCAN)
 964 #define lmp_sc_capable(dev)         ((dev)->features[2][1] & LMP_SC)
 965 #define lmp_ping_capable(dev)       ((dev)->features[2][1] & LMP_PING)
 966
 967 /* ----- Host capabilities ----- */
 968 #define lmp_host_ssp_capable(dev)  ((dev)->features[1][0] & LMP_HOST_SSP)
 969 #define lmp_host_sc_capable(dev)   ((dev)->features[1][0] & LMP_HOST_SC)
 970 #define lmp_host_le_capable(dev)   (!!((dev)->features[1][0] & LMP_HOST_LE))
 971 #define lmp_host_le_br_capable(dev) (!!((dev)->features[1][0] & LMP_HOST_LE_BREDR))
 972
 973 #define hdev_is_powered(hdev) (test_bit(HCI_UP, &hdev->flags) && \
 974                                 !test_bit(HCI_AUTO_OFF, &hdev->dev_flags))
 975
 976 /* ----- HCI protocols ----- */
 977 #define HCI_PROTO_DEFER             0x01
 978
 979 static inline int hci_proto_connect_ind(struct hci_dev *hdev, bdaddr_t *bdaddr,
 980                                         __u8 type, __u8 *flags)
 981 {
 982         switch (type) {
 983         case ACL_LINK:
 984                 return l2cap_connect_ind(hdev, bdaddr);
 985
 986         case SCO_LINK:
 987         case ESCO_LINK:
 988                 return sco_connect_ind(hdev, bdaddr, flags);
 989
 990         default:
 991                 BT_ERR("unknown link type %d", type);
 992                 return -EINVAL;
 993         }
 994 }
 995
 996 static inline void hci_proto_connect_cfm(struct hci_conn *conn, __u8 status)
 997 {
 998         switch (conn->type) {
 999         case ACL_LINK:
1000         case LE_LINK:
1001                 l2cap_connect_cfm(conn, status);
1002                 break;
1003
1004         case SCO_LINK:
1005         case ESCO_LINK:
1006                 sco_connect_cfm(conn, status);
1007                 break;
1008
1009         default:
1010                 BT_ERR("unknown link type %d", conn->type);
1011                 break;
1012         }
1013
1014         if (conn->connect_cfm_cb)
1015                 conn->connect_cfm_cb(conn, status);
1016 }
1017
1018 static inline int hci_proto_disconn_ind(struct hci_conn *conn)
1019 {
1020         if (conn->type != ACL_LINK && conn->type != LE_LINK)
1021                 return HCI_ERROR_REMOTE_USER_TERM;
1022
1023         return l2cap_disconn_ind(conn);
1024 }
1025
1026 static inline void hci_proto_disconn_cfm(struct hci_conn *conn, __u8 reason)
1027 {
1028         switch (conn->type) {
1029         case ACL_LINK:
1030         case LE_LINK:
1031                 l2cap_disconn_cfm(conn, reason);
1032                 break;
1033
1034         case SCO_LINK:
1035         case ESCO_LINK:
1036                 sco_disconn_cfm(conn, reason);
1037                 break;
1038
1039         /* L2CAP would be handled for BREDR chan */
1040         case AMP_LINK:
1041                 break;
1042
1043         default:
1044                 BT_ERR("unknown link type %d", conn->type);
1045                 break;
1046         }
1047
1048         if (conn->disconn_cfm_cb)
1049                 conn->disconn_cfm_cb(conn, reason);
1050 }
1051
1052 static inline void hci_proto_auth_cfm(struct hci_conn *conn, __u8 status)
1053 {
1054         __u8 encrypt;
1055
1056         if (conn->type != ACL_LINK && conn->type != LE_LINK)
1057                 return;
1058
1059         if (test_bit(HCI_CONN_ENCRYPT_PEND, &conn->flags))
1060                 return;
1061
1062         encrypt = test_bit(HCI_CONN_ENCRYPT, &conn->flags) ? 0x01 : 0x00;
1063         l2cap_security_cfm(conn, status, encrypt);
1064
1065         if (conn->security_cfm_cb)
1066                 conn->security_cfm_cb(conn, status);
1067 }
1068
1069 static inline void hci_proto_encrypt_cfm(struct hci_conn *conn, __u8 status,
1070                                                                 __u8 encrypt)
1071 {
1072         if (conn->type != ACL_LINK && conn->type != LE_LINK)
1073                 return;
1074
1075         l2cap_security_cfm(conn, status, encrypt);
1076
1077         if (conn->security_cfm_cb)
1078                 conn->security_cfm_cb(conn, status);
1079 }
1080
1081 /* ----- HCI callbacks ----- */
1082 struct hci_cb {
1083         struct list_head list;
1084
1085         char *name;
1086
1087         void (*security_cfm)    (struct hci_conn *conn, __u8 status,
1088                                                                 __u8 encrypt);
1089         void (*key_change_cfm)  (struct hci_conn *conn, __u8 status);
1090         void (*role_switch_cfm) (struct hci_conn *conn, __u8 status, __u8 role);
1091 };
1092
1093 static inline void hci_auth_cfm(struct hci_conn *conn, __u8 status)
1094 {
1095         struct hci_cb *cb;
1096         __u8 encrypt;
1097
1098         hci_proto_auth_cfm(conn, status);
1099
1100         if (test_bit(HCI_CONN_ENCRYPT_PEND, &conn->flags))
1101                 return;
1102
1103         encrypt = test_bit(HCI_CONN_ENCRYPT, &conn->flags) ? 0x01 : 0x00;
1104
1105         read_lock(&hci_cb_list_lock);
1106         list_for_each_entry(cb, &hci_cb_list, list) {
1107                 if (cb->security_cfm)
1108                         cb->security_cfm(conn, status, encrypt);
1109         }
1110         read_unlock(&hci_cb_list_lock);
1111 }
1112
1113 static inline void hci_encrypt_cfm(struct hci_conn *conn, __u8 status,
1114                                                                 __u8 encrypt)
1115 {
1116         struct hci_cb *cb;
1117
1118         if (conn->sec_level == BT_SECURITY_SDP)
1119                 conn->sec_level = BT_SECURITY_LOW;
1120
1121         if (conn->pending_sec_level > conn->sec_level)
1122                 conn->sec_level = conn->pending_sec_level;
1123
1124         hci_proto_encrypt_cfm(conn, status, encrypt);
1125
1126         read_lock(&hci_cb_list_lock);
1127         list_for_each_entry(cb, &hci_cb_list, list) {
1128                 if (cb->security_cfm)
1129                         cb->security_cfm(conn, status, encrypt);
1130         }
1131         read_unlock(&hci_cb_list_lock);
1132 }
1133
1134 static inline void hci_key_change_cfm(struct hci_conn *conn, __u8 status)
1135 {
1136         struct hci_cb *cb;
1137
1138         read_lock(&hci_cb_list_lock);
1139         list_for_each_entry(cb, &hci_cb_list, list) {
1140                 if (cb->key_change_cfm)
1141                         cb->key_change_cfm(conn, status);
1142         }
1143         read_unlock(&hci_cb_list_lock);
1144 }
1145
1146 static inline void hci_role_switch_cfm(struct hci_conn *conn, __u8 status,
1147                                                                 __u8 role)
1148 {
1149         struct hci_cb *cb;
1150
1151         read_lock(&hci_cb_list_lock);
1152         list_for_each_entry(cb, &hci_cb_list, list) {
1153                 if (cb->role_switch_cfm)
1154                         cb->role_switch_cfm(conn, status, role);
1155         }
1156         read_unlock(&hci_cb_list_lock);
1157 }
1158
1159 static inline bool eir_has_data_type(u8 *data, size_t data_len, u8 type)
1160 {
1161         size_t parsed = 0;
1162
1163         if (data_len < 2)
1164                 return false;
1165
1166         while (parsed < data_len - 1) {
1167                 u8 field_len = data[0];
1168
1169                 if (field_len == 0)
1170                         break;
1171
1172                 parsed += field_len + 1;
1173
1174                 if (parsed > data_len)
1175                         break;
1176
1177                 if (data[1] == type)
1178                         return true;
1179
1180                 data += field_len + 1;
1181         }
1182
1183         return false;
1184 }
1185
1186 static inline bool hci_bdaddr_is_rpa(bdaddr_t *bdaddr, u8 addr_type)
1187 {
1188         if (addr_type != ADDR_LE_DEV_RANDOM)
1189                 return false;
1190
1191         if ((bdaddr->b[5] & 0xc0) == 0x40)
1192                return true;
1193
1194         return false;
1195 }
1196
1197 static inline bool hci_is_identity_address(bdaddr_t *addr, u8 addr_type)
1198 {
1199         if (addr_type == ADDR_LE_DEV_PUBLIC)
1200                 return true;
1201
1202         /* Check for Random Static address type */
1203         if ((addr->b[5] & 0xc0) == 0xc0)
1204                 return true;
1205
1206         return false;
1207 }
1208
1209 static inline struct smp_irk *hci_get_irk(struct hci_dev *hdev,
1210                                           bdaddr_t *bdaddr, u8 addr_type)
1211 {
1212         if (!hci_bdaddr_is_rpa(bdaddr, addr_type))
1213                 return NULL;
1214
1215         return hci_find_irk_by_rpa(hdev, bdaddr);
1216 }
1217
1218 static inline int hci_check_conn_params(u16 min, u16 max, u16 latency,
1219                                         u16 to_multiplier)
1220 {
1221         u16 max_latency;
1222
1223         if (min > max || min < 6 || max > 3200)
1224                 return -EINVAL;
1225
1226         if (to_multiplier < 10 || to_multiplier > 3200)
1227                 return -EINVAL;
1228
1229         if (max >= to_multiplier * 8)
1230                 return -EINVAL;
1231
1232         max_latency = (to_multiplier * 8 / max) - 1;
1233         if (latency > 499 || latency > max_latency)
1234                 return -EINVAL;
1235
1236         return 0;
1237 }
1238
1239 int hci_register_cb(struct hci_cb *hcb);
1240 int hci_unregister_cb(struct hci_cb *hcb);
1241
1242 struct hci_request {
1243         struct hci_dev          *hdev;
1244         struct sk_buff_head     cmd_q;
1245
1246         /* If something goes wrong when building the HCI request, the error
1247          * value is stored in this field.
1248          */
1249         int                     err;
1250 };
1251
1252 void hci_req_init(struct hci_request *req, struct hci_dev *hdev);
1253 int hci_req_run(struct hci_request *req, hci_req_complete_t complete);
1254 void hci_req_add(struct hci_request *req, u16 opcode, u32 plen,
1255                  const void *param);
1256 void hci_req_add_ev(struct hci_request *req, u16 opcode, u32 plen,
1257                     const void *param, u8 event);
1258 void hci_req_cmd_complete(struct hci_dev *hdev, u16 opcode, u8 status);
1259 bool hci_req_pending(struct hci_dev *hdev);
1260
1261 void hci_req_add_le_scan_disable(struct hci_request *req);
1262 void hci_req_add_le_passive_scan(struct hci_request *req);
1263
1264 void hci_update_page_scan(struct hci_dev *hdev, struct hci_request *req);
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_control(struct sk_buff *skb, 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 /* Management interface */
1286 #define DISCOV_TYPE_BREDR               (BIT(BDADDR_BREDR))
1287 #define DISCOV_TYPE_LE                  (BIT(BDADDR_LE_PUBLIC) | \
1288                                          BIT(BDADDR_LE_RANDOM))
1289 #define DISCOV_TYPE_INTERLEAVED         (BIT(BDADDR_BREDR) | \
1290                                          BIT(BDADDR_LE_PUBLIC) | \
1291                                          BIT(BDADDR_LE_RANDOM))
1292
1293 /* These LE scan and inquiry parameters were chosen according to LE General
1294  * Discovery Procedure specification.
1295  */
1296 #define DISCOV_LE_SCAN_WIN              0x12
1297 #define DISCOV_LE_SCAN_INT              0x12
1298 #define DISCOV_LE_TIMEOUT               10240   /* msec */
1299 #define DISCOV_INTERLEAVED_TIMEOUT      5120    /* msec */
1300 #define DISCOV_INTERLEAVED_INQUIRY_LEN  0x04
1301 #define DISCOV_BREDR_INQUIRY_LEN        0x08
1302
1303 int mgmt_control(struct sock *sk, struct msghdr *msg, size_t len);
1304 int mgmt_new_settings(struct hci_dev *hdev);
1305 void mgmt_index_added(struct hci_dev *hdev);
1306 void mgmt_index_removed(struct hci_dev *hdev);
1307 void mgmt_set_powered_failed(struct hci_dev *hdev, int err);
1308 int mgmt_powered(struct hci_dev *hdev, u8 powered);
1309 int mgmt_update_adv_data(struct hci_dev *hdev);
1310 void mgmt_discoverable_timeout(struct hci_dev *hdev);
1311 void mgmt_new_link_key(struct hci_dev *hdev, struct link_key *key,
1312                        bool persistent);
1313 void mgmt_device_connected(struct hci_dev *hdev, bdaddr_t *bdaddr, u8 link_type,
1314                            u8 addr_type, u32 flags, u8 *name, u8 name_len,
1315                            u8 *dev_class);
1316 void mgmt_device_disconnected(struct hci_dev *hdev, bdaddr_t *bdaddr,
1317                               u8 link_type, u8 addr_type, u8 reason,
1318                               bool mgmt_connected);
1319 void mgmt_disconnect_failed(struct hci_dev *hdev, bdaddr_t *bdaddr,
1320                             u8 link_type, u8 addr_type, u8 status);
1321 void mgmt_connect_failed(struct hci_dev *hdev, bdaddr_t *bdaddr, u8 link_type,
1322                          u8 addr_type, u8 status);
1323 void mgmt_pin_code_request(struct hci_dev *hdev, bdaddr_t *bdaddr, u8 secure);
1324 void mgmt_pin_code_reply_complete(struct hci_dev *hdev, bdaddr_t *bdaddr,
1325                                   u8 status);
1326 void mgmt_pin_code_neg_reply_complete(struct hci_dev *hdev, bdaddr_t *bdaddr,
1327                                       u8 status);
1328 int mgmt_user_confirm_request(struct hci_dev *hdev, bdaddr_t *bdaddr,
1329                               u8 link_type, u8 addr_type, u32 value,
1330                               u8 confirm_hint);
1331 int mgmt_user_confirm_reply_complete(struct hci_dev *hdev, bdaddr_t *bdaddr,
1332                                      u8 link_type, u8 addr_type, u8 status);
1333 int mgmt_user_confirm_neg_reply_complete(struct hci_dev *hdev, bdaddr_t *bdaddr,
1334                                          u8 link_type, u8 addr_type, u8 status);
1335 int mgmt_user_passkey_request(struct hci_dev *hdev, bdaddr_t *bdaddr,
1336                               u8 link_type, u8 addr_type);
1337 int mgmt_user_passkey_reply_complete(struct hci_dev *hdev, bdaddr_t *bdaddr,
1338                                      u8 link_type, u8 addr_type, u8 status);
1339 int mgmt_user_passkey_neg_reply_complete(struct hci_dev *hdev, bdaddr_t *bdaddr,
1340                                          u8 link_type, u8 addr_type, u8 status);
1341 int mgmt_user_passkey_notify(struct hci_dev *hdev, bdaddr_t *bdaddr,
1342                              u8 link_type, u8 addr_type, u32 passkey,
1343                              u8 entered);
1344 void mgmt_auth_failed(struct hci_conn *conn, u8 status);
1345 void mgmt_auth_enable_complete(struct hci_dev *hdev, u8 status);
1346 void mgmt_ssp_enable_complete(struct hci_dev *hdev, u8 enable, u8 status);
1347 void mgmt_sc_enable_complete(struct hci_dev *hdev, u8 enable, u8 status);
1348 void mgmt_set_class_of_dev_complete(struct hci_dev *hdev, u8 *dev_class,
1349                                     u8 status);
1350 void mgmt_set_local_name_complete(struct hci_dev *hdev, u8 *name, u8 status);
1351 void mgmt_read_local_oob_data_complete(struct hci_dev *hdev, u8 *hash192,
1352                                        u8 *randomizer192, u8 *hash256,
1353                                        u8 *randomizer256, u8 status);
1354 void mgmt_device_found(struct hci_dev *hdev, bdaddr_t *bdaddr, u8 link_type,
1355                        u8 addr_type, u8 *dev_class, s8 rssi, u32 flags,
1356                        u8 *eir, u16 eir_len, u8 *scan_rsp, u8 scan_rsp_len);
1357 void mgmt_remote_name(struct hci_dev *hdev, bdaddr_t *bdaddr, u8 link_type,
1358                       u8 addr_type, s8 rssi, u8 *name, u8 name_len);
1359 void mgmt_discovering(struct hci_dev *hdev, u8 discovering);
1360 bool mgmt_powering_down(struct hci_dev *hdev);
1361 void mgmt_new_ltk(struct hci_dev *hdev, struct smp_ltk *key, bool persistent);
1362 void mgmt_new_irk(struct hci_dev *hdev, struct smp_irk *irk);
1363 void mgmt_new_csrk(struct hci_dev *hdev, struct smp_csrk *csrk,
1364                    bool persistent);
1365 void mgmt_new_conn_param(struct hci_dev *hdev, bdaddr_t *bdaddr,
1366                          u8 bdaddr_type, u8 store_hint, u16 min_interval,
1367                          u16 max_interval, u16 latency, u16 timeout);
1368 void mgmt_reenable_advertising(struct hci_dev *hdev);
1369 void mgmt_smp_complete(struct hci_conn *conn, bool complete);
1370
1371 u8 hci_le_conn_update(struct hci_conn *conn, u16 min, u16 max, u16 latency,
1372                       u16 to_multiplier);
1373 void hci_le_start_enc(struct hci_conn *conn, __le16 ediv, __le64 rand,
1374                                                         __u8 ltk[16]);
1375
1376 int hci_update_random_address(struct hci_request *req, bool require_privacy,
1377                               u8 *own_addr_type);
1378 void hci_copy_identity_address(struct hci_dev *hdev, bdaddr_t *bdaddr,
1379                                u8 *bdaddr_type);
1380
1381 #define SCO_AIRMODE_MASK       0x0003
1382 #define SCO_AIRMODE_CVSD       0x0000
1383 #define SCO_AIRMODE_TRANSP     0x0003
1384
1385 #endif /* __HCI_CORE_H */