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         s8                      rssi;
  80         u16                     uuid_count;
  81         u8                      (*uuids)[16];
  82         unsigned long           scan_start;
  83         unsigned long           scan_duration;
  84 };
  85
  86 struct hci_conn_hash {
  87         struct list_head list;
  88         unsigned int     acl_num;
  89         unsigned int     amp_num;
  90         unsigned int     sco_num;
  91         unsigned int     le_num;
  92         unsigned int     le_num_slave;
  93 };
  94
  95 struct bdaddr_list {
  96         struct list_head list;
  97         bdaddr_t bdaddr;
  98         u8 bdaddr_type;
  99 };
 100
 101 struct bt_uuid {
 102         struct list_head list;
 103         u8 uuid[16];
 104         u8 size;
 105         u8 svc_hint;
 106 };
 107
 108 struct smp_csrk {
 109         bdaddr_t bdaddr;
 110         u8 bdaddr_type;
 111         u8 master;
 112         u8 val[16];
 113 };
 114
 115 struct smp_ltk {
 116         struct list_head list;
 117         struct rcu_head rcu;
 118         bdaddr_t bdaddr;
 119         u8 bdaddr_type;
 120         u8 authenticated;
 121         u8 type;
 122         u8 enc_size;
 123         __le16 ediv;
 124         __le64 rand;
 125         u8 val[16];
 126 };
 127
 128 struct smp_irk {
 129         struct list_head list;
 130         struct rcu_head rcu;
 131         bdaddr_t rpa;
 132         bdaddr_t bdaddr;
 133         u8 addr_type;
 134         u8 val[16];
 135 };
 136
 137 struct link_key {
 138         struct list_head list;
 139         struct rcu_head rcu;
 140         bdaddr_t bdaddr;
 141         u8 type;
 142         u8 val[HCI_LINK_KEY_SIZE];
 143         u8 pin_len;
 144 };
 145
 146 struct oob_data {
 147         struct list_head list;
 148         bdaddr_t bdaddr;
 149         u8 bdaddr_type;
 150         u8 present;
 151         u8 hash192[16];
 152         u8 rand192[16];
 153         u8 hash256[16];
 154         u8 rand256[16];
 155 };
 156
 157 #define HCI_MAX_SHORT_NAME_LENGTH       10
 158
 159 /* Default LE RPA expiry time, 15 minutes */
 160 #define HCI_DEFAULT_RPA_TIMEOUT         (15 * 60)
 161
 162 /* Default min/max age of connection information (1s/3s) */
 163 #define DEFAULT_CONN_INFO_MIN_AGE       1000
 164 #define DEFAULT_CONN_INFO_MAX_AGE       3000
 165
 166 struct amp_assoc {
 167         __u16   len;
 168         __u16   offset;
 169         __u16   rem_len;
 170         __u16   len_so_far;
 171         __u8    data[HCI_MAX_AMP_ASSOC_SIZE];
 172 };
 173
 174 #define HCI_MAX_PAGES   3
 175
 176 #define NUM_REASSEMBLY 4
 177 struct hci_dev {
 178         struct list_head list;
 179         struct mutex    lock;
 180
 181         char            name[8];
 182         unsigned long   flags;
 183         __u16           id;
 184         __u8            bus;
 185         __u8            dev_type;
 186         bdaddr_t        bdaddr;
 187         bdaddr_t        setup_addr;
 188         bdaddr_t        public_addr;
 189         bdaddr_t        random_addr;
 190         bdaddr_t        static_addr;
 191         __u8            adv_addr_type;
 192         __u8            dev_name[HCI_MAX_NAME_LENGTH];
 193         __u8            short_name[HCI_MAX_SHORT_NAME_LENGTH];
 194         __u8            eir[HCI_MAX_EIR_LENGTH];
 195         __u8            dev_class[3];
 196         __u8            major_class;
 197         __u8            minor_class;
 198         __u8            max_page;
 199         __u8            features[HCI_MAX_PAGES][8];
 200         __u8            le_features[8];
 201         __u8            le_white_list_size;
 202         __u8            le_states[8];
 203         __u8            commands[64];
 204         __u8            hci_ver;
 205         __u16           hci_rev;
 206         __u8            lmp_ver;
 207         __u16           manufacturer;
 208         __u16           lmp_subver;
 209         __u16           voice_setting;
 210         __u8            num_iac;
 211         __u8            stored_max_keys;
 212         __u8            stored_num_keys;
 213         __u8            io_capability;
 214         __s8            inq_tx_power;
 215         __u16           page_scan_interval;
 216         __u16           page_scan_window;
 217         __u8            page_scan_type;
 218         __u8            le_adv_channel_map;
 219         __u16           le_adv_min_interval;
 220         __u16           le_adv_max_interval;
 221         __u8            le_scan_type;
 222         __u16           le_scan_interval;
 223         __u16           le_scan_window;
 224         __u16           le_conn_min_interval;
 225         __u16           le_conn_max_interval;
 226         __u16           le_conn_latency;
 227         __u16           le_supv_timeout;
 228         __u16           le_def_tx_len;
 229         __u16           le_def_tx_time;
 230         __u16           le_max_tx_len;
 231         __u16           le_max_tx_time;
 232         __u16           le_max_rx_len;
 233         __u16           le_max_rx_time;
 234         __u16           discov_interleaved_timeout;
 235         __u16           conn_info_min_age;
 236         __u16           conn_info_max_age;
 237         __u8            ssp_debug_mode;
 238         __u8            hw_error_code;
 239         __u32           clock;
 240
 241         __u16           devid_source;
 242         __u16           devid_vendor;
 243         __u16           devid_product;
 244         __u16           devid_version;
 245
 246         __u16           pkt_type;
 247         __u16           esco_type;
 248         __u16           link_policy;
 249         __u16           link_mode;
 250
 251         __u32           idle_timeout;
 252         __u16           sniff_min_interval;
 253         __u16           sniff_max_interval;
 254
 255         __u8            amp_status;
 256         __u32           amp_total_bw;
 257         __u32           amp_max_bw;
 258         __u32           amp_min_latency;
 259         __u32           amp_max_pdu;
 260         __u8            amp_type;
 261         __u16           amp_pal_cap;
 262         __u16           amp_assoc_size;
 263         __u32           amp_max_flush_to;
 264         __u32           amp_be_flush_to;
 265
 266         struct amp_assoc        loc_assoc;
 267
 268         __u8            flow_ctl_mode;
 269
 270         unsigned int    auto_accept_delay;
 271
 272         unsigned long   quirks;
 273
 274         atomic_t        cmd_cnt;
 275         unsigned int    acl_cnt;
 276         unsigned int    sco_cnt;
 277         unsigned int    le_cnt;
 278
 279         unsigned int    acl_mtu;
 280         unsigned int    sco_mtu;
 281         unsigned int    le_mtu;
 282         unsigned int    acl_pkts;
 283         unsigned int    sco_pkts;
 284         unsigned int    le_pkts;
 285
 286         __u16           block_len;
 287         __u16           block_mtu;
 288         __u16           num_blocks;
 289         __u16           block_cnt;
 290
 291         unsigned long   acl_last_tx;
 292         unsigned long   sco_last_tx;
 293         unsigned long   le_last_tx;
 294
 295         struct workqueue_struct *workqueue;
 296         struct workqueue_struct *req_workqueue;
 297
 298         struct work_struct      power_on;
 299         struct delayed_work     power_off;
 300         struct work_struct      error_reset;
 301
 302         __u16                   discov_timeout;
 303         struct delayed_work     discov_off;
 304
 305         struct delayed_work     service_cache;
 306
 307         struct delayed_work     cmd_timer;
 308
 309         struct work_struct      rx_work;
 310         struct work_struct      cmd_work;
 311         struct work_struct      tx_work;
 312
 313         struct sk_buff_head     rx_q;
 314         struct sk_buff_head     raw_q;
 315         struct sk_buff_head     cmd_q;
 316
 317         struct sk_buff          *recv_evt;
 318         struct sk_buff          *sent_cmd;
 319         struct sk_buff          *reassembly[NUM_REASSEMBLY];
 320
 321         struct mutex            req_lock;
 322         wait_queue_head_t       req_wait_q;
 323         __u32                   req_status;
 324         __u32                   req_result;
 325
 326         void                    *smp_data;
 327         void                    *smp_bredr_data;
 328
 329         struct discovery_state  discovery;
 330         struct hci_conn_hash    conn_hash;
 331
 332         struct list_head        mgmt_pending;
 333         struct list_head        blacklist;
 334         struct list_head        whitelist;
 335         struct list_head        uuids;
 336         struct list_head        link_keys;
 337         struct list_head        long_term_keys;
 338         struct list_head        identity_resolving_keys;
 339         struct list_head        remote_oob_data;
 340         struct list_head        le_white_list;
 341         struct list_head        le_conn_params;
 342         struct list_head        pend_le_conns;
 343         struct list_head        pend_le_reports;
 344
 345         struct hci_dev_stats    stat;
 346
 347         atomic_t                promisc;
 348
 349         struct dentry           *debugfs;
 350
 351         struct device           dev;
 352
 353         struct rfkill           *rfkill;
 354
 355         unsigned long           dbg_flags;
 356         unsigned long           dev_flags;
 357
 358         struct delayed_work     le_scan_disable;
 359         struct delayed_work     le_scan_restart;
 360
 361         __s8                    adv_tx_power;
 362         __u8                    adv_data[HCI_MAX_AD_LENGTH];
 363         __u8                    adv_data_len;
 364         __u8                    scan_rsp_data[HCI_MAX_AD_LENGTH];
 365         __u8                    scan_rsp_data_len;
 366
 367         __u8                    irk[16];
 368         __u32                   rpa_timeout;
 369         struct delayed_work     rpa_expired;
 370         bdaddr_t                rpa;
 371
 372         int (*open)(struct hci_dev *hdev);
 373         int (*close)(struct hci_dev *hdev);
 374         int (*flush)(struct hci_dev *hdev);
 375         int (*setup)(struct hci_dev *hdev);
 376         int (*send)(struct hci_dev *hdev, struct sk_buff *skb);
 377         void (*notify)(struct hci_dev *hdev, unsigned int evt);
 378         void (*hw_error)(struct hci_dev *hdev, u8 code);
 379         int (*set_bdaddr)(struct hci_dev *hdev, const bdaddr_t *bdaddr);
 380 };
 381
 382 #define HCI_PHY_HANDLE(handle)  (handle & 0xff)
 383
 384 struct hci_conn {
 385         struct list_head list;
 386
 387         atomic_t        refcnt;
 388
 389         bdaddr_t        dst;
 390         __u8            dst_type;
 391         bdaddr_t        src;
 392         __u8            src_type;
 393         bdaddr_t        init_addr;
 394         __u8            init_addr_type;
 395         bdaddr_t        resp_addr;
 396         __u8            resp_addr_type;
 397         __u16           handle;
 398         __u16           state;
 399         __u8            mode;
 400         __u8            type;
 401         __u8            role;
 402         bool            out;
 403         __u8            attempt;
 404         __u8            dev_class[3];
 405         __u8            features[HCI_MAX_PAGES][8];
 406         __u16           pkt_type;
 407         __u16           link_policy;
 408         __u8            key_type;
 409         __u8            auth_type;
 410         __u8            sec_level;
 411         __u8            pending_sec_level;
 412         __u8            pin_length;
 413         __u8            enc_key_size;
 414         __u8            io_capability;
 415         __u32           passkey_notify;
 416         __u8            passkey_entered;
 417         __u16           disc_timeout;
 418         __u16           conn_timeout;
 419         __u16           setting;
 420         __u16           le_conn_min_interval;
 421         __u16           le_conn_max_interval;
 422         __u16           le_conn_interval;
 423         __u16           le_conn_latency;
 424         __u16           le_supv_timeout;
 425         __u8            le_adv_data[HCI_MAX_AD_LENGTH];
 426         __u8            le_adv_data_len;
 427         __s8            rssi;
 428         __s8            tx_power;
 429         __s8            max_tx_power;
 430         unsigned long   flags;
 431
 432         __u32           clock;
 433         __u16           clock_accuracy;
 434
 435         unsigned long   conn_info_timestamp;
 436
 437         __u8            remote_cap;
 438         __u8            remote_auth;
 439         __u8            remote_id;
 440
 441         unsigned int    sent;
 442
 443         struct sk_buff_head data_q;
 444         struct list_head chan_list;
 445
 446         struct delayed_work disc_work;
 447         struct delayed_work auto_accept_work;
 448         struct delayed_work idle_work;
 449         struct delayed_work le_conn_timeout;
 450
 451         struct device   dev;
 452         struct dentry   *debugfs;
 453
 454         struct hci_dev  *hdev;
 455         void            *l2cap_data;
 456         void            *sco_data;
 457         struct amp_mgr  *amp_mgr;
 458
 459         struct hci_conn *link;
 460
 461         void (*connect_cfm_cb)  (struct hci_conn *conn, u8 status);
 462         void (*security_cfm_cb) (struct hci_conn *conn, u8 status);
 463         void (*disconn_cfm_cb)  (struct hci_conn *conn, u8 reason);
 464 };
 465
 466 struct hci_chan {
 467         struct list_head list;
 468         __u16 handle;
 469         struct hci_conn *conn;
 470         struct sk_buff_head data_q;
 471         unsigned int    sent;
 472         __u8            state;
 473 };
 474
 475 struct hci_conn_params {
 476         struct list_head list;
 477         struct list_head action;
 478
 479         bdaddr_t addr;
 480         u8 addr_type;
 481
 482         u16 conn_min_interval;
 483         u16 conn_max_interval;
 484         u16 conn_latency;
 485         u16 supervision_timeout;
 486
 487         enum {
 488                 HCI_AUTO_CONN_DISABLED,
 489                 HCI_AUTO_CONN_REPORT,
 490                 HCI_AUTO_CONN_DIRECT,
 491                 HCI_AUTO_CONN_ALWAYS,
 492                 HCI_AUTO_CONN_LINK_LOSS,
 493         } auto_connect;
 494
 495         struct hci_conn *conn;
 496 };
 497
 498 extern struct list_head hci_dev_list;
 499 extern struct list_head hci_cb_list;
 500 extern rwlock_t hci_dev_list_lock;
 501 extern rwlock_t hci_cb_list_lock;
 502
 503 /* ----- HCI interface to upper protocols ----- */
 504 int l2cap_connect_ind(struct hci_dev *hdev, bdaddr_t *bdaddr);
 505 void l2cap_connect_cfm(struct hci_conn *hcon, u8 status);
 506 int l2cap_disconn_ind(struct hci_conn *hcon);
 507 void l2cap_disconn_cfm(struct hci_conn *hcon, u8 reason);
 508 int l2cap_security_cfm(struct hci_conn *hcon, u8 status, u8 encrypt);
 509 int l2cap_recv_acldata(struct hci_conn *hcon, struct sk_buff *skb, u16 flags);
 510
 511 int sco_connect_ind(struct hci_dev *hdev, bdaddr_t *bdaddr, __u8 *flags);
 512 void sco_connect_cfm(struct hci_conn *hcon, __u8 status);
 513 void sco_disconn_cfm(struct hci_conn *hcon, __u8 reason);
 514 int sco_recv_scodata(struct hci_conn *hcon, struct sk_buff *skb);
 515
 516 /* ----- Inquiry cache ----- */
 517 #define INQUIRY_CACHE_AGE_MAX   (HZ*30)   /* 30 seconds */
 518 #define INQUIRY_ENTRY_AGE_MAX   (HZ*60)   /* 60 seconds */
 519
 520 static inline void discovery_init(struct hci_dev *hdev)
 521 {
 522         hdev->discovery.state = DISCOVERY_STOPPED;
 523         INIT_LIST_HEAD(&hdev->discovery.all);
 524         INIT_LIST_HEAD(&hdev->discovery.unknown);
 525         INIT_LIST_HEAD(&hdev->discovery.resolve);
 526         hdev->discovery.report_invalid_rssi = true;
 527         hdev->discovery.rssi = HCI_RSSI_INVALID;
 528 }
 529
 530 static inline void hci_discovery_filter_clear(struct hci_dev *hdev)
 531 {
 532         hdev->discovery.report_invalid_rssi = true;
 533         hdev->discovery.rssi = HCI_RSSI_INVALID;
 534         hdev->discovery.uuid_count = 0;
 535         kfree(hdev->discovery.uuids);
 536         hdev->discovery.uuids = NULL;
 537         hdev->discovery.scan_start = 0;
 538         hdev->discovery.scan_duration = 0;
 539 }
 540
 541 bool hci_discovery_active(struct hci_dev *hdev);
 542
 543 void hci_discovery_set_state(struct hci_dev *hdev, int state);
 544
 545 static inline int inquiry_cache_empty(struct hci_dev *hdev)
 546 {
 547         return list_empty(&hdev->discovery.all);
 548 }
 549
 550 static inline long inquiry_cache_age(struct hci_dev *hdev)
 551 {
 552         struct discovery_state *c = &hdev->discovery;
 553         return jiffies - c->timestamp;
 554 }
 555
 556 static inline long inquiry_entry_age(struct inquiry_entry *e)
 557 {
 558         return jiffies - e->timestamp;
 559 }
 560
 561 struct inquiry_entry *hci_inquiry_cache_lookup(struct hci_dev *hdev,
 562                                                bdaddr_t *bdaddr);
 563 struct inquiry_entry *hci_inquiry_cache_lookup_unknown(struct hci_dev *hdev,
 564                                                        bdaddr_t *bdaddr);
 565 struct inquiry_entry *hci_inquiry_cache_lookup_resolve(struct hci_dev *hdev,
 566                                                        bdaddr_t *bdaddr,
 567                                                        int state);
 568 void hci_inquiry_cache_update_resolve(struct hci_dev *hdev,
 569                                       struct inquiry_entry *ie);
 570 u32 hci_inquiry_cache_update(struct hci_dev *hdev, struct inquiry_data *data,
 571                              bool name_known);
 572 void hci_inquiry_cache_flush(struct hci_dev *hdev);
 573
 574 /* ----- HCI Connections ----- */
 575 enum {
 576         HCI_CONN_AUTH_PEND,
 577         HCI_CONN_REAUTH_PEND,
 578         HCI_CONN_ENCRYPT_PEND,
 579         HCI_CONN_RSWITCH_PEND,
 580         HCI_CONN_MODE_CHANGE_PEND,
 581         HCI_CONN_SCO_SETUP_PEND,
 582         HCI_CONN_MGMT_CONNECTED,
 583         HCI_CONN_SSP_ENABLED,
 584         HCI_CONN_SC_ENABLED,
 585         HCI_CONN_AES_CCM,
 586         HCI_CONN_POWER_SAVE,
 587         HCI_CONN_REMOTE_OOB,
 588         HCI_CONN_FLUSH_KEY,
 589         HCI_CONN_ENCRYPT,
 590         HCI_CONN_AUTH,
 591         HCI_CONN_SECURE,
 592         HCI_CONN_FIPS,
 593         HCI_CONN_STK_ENCRYPT,
 594         HCI_CONN_AUTH_INITIATOR,
 595         HCI_CONN_DROP,
 596         HCI_CONN_PARAM_REMOVAL_PEND,
 597         HCI_CONN_NEW_LINK_KEY,
 598 };
 599
 600 static inline bool hci_conn_ssp_enabled(struct hci_conn *conn)
 601 {
 602         struct hci_dev *hdev = conn->hdev;
 603         return test_bit(HCI_SSP_ENABLED, &hdev->dev_flags) &&
 604                test_bit(HCI_CONN_SSP_ENABLED, &conn->flags);
 605 }
 606
 607 static inline bool hci_conn_sc_enabled(struct hci_conn *conn)
 608 {
 609         struct hci_dev *hdev = conn->hdev;
 610         return test_bit(HCI_SC_ENABLED, &hdev->dev_flags) &&
 611                test_bit(HCI_CONN_SC_ENABLED, &conn->flags);
 612 }
 613
 614 static inline void hci_conn_hash_add(struct hci_dev *hdev, struct hci_conn *c)
 615 {
 616         struct hci_conn_hash *h = &hdev->conn_hash;
 617         list_add_rcu(&c->list, &h->list);
 618         switch (c->type) {
 619         case ACL_LINK:
 620                 h->acl_num++;
 621                 break;
 622         case AMP_LINK:
 623                 h->amp_num++;
 624                 break;
 625         case LE_LINK:
 626                 h->le_num++;
 627                 if (c->role == HCI_ROLE_SLAVE)
 628                         h->le_num_slave++;
 629                 break;
 630         case SCO_LINK:
 631         case ESCO_LINK:
 632                 h->sco_num++;
 633                 break;
 634         }
 635 }
 636
 637 static inline void hci_conn_hash_del(struct hci_dev *hdev, struct hci_conn *c)
 638 {
 639         struct hci_conn_hash *h = &hdev->conn_hash;
 640
 641         list_del_rcu(&c->list);
 642         synchronize_rcu();
 643
 644         switch (c->type) {
 645         case ACL_LINK:
 646                 h->acl_num--;
 647                 break;
 648         case AMP_LINK:
 649                 h->amp_num--;
 650                 break;
 651         case LE_LINK:
 652                 h->le_num--;
 653                 if (c->role == HCI_ROLE_SLAVE)
 654                         h->le_num_slave--;
 655                 break;
 656         case SCO_LINK:
 657         case ESCO_LINK:
 658                 h->sco_num--;
 659                 break;
 660         }
 661 }
 662
 663 static inline unsigned int hci_conn_num(struct hci_dev *hdev, __u8 type)
 664 {
 665         struct hci_conn_hash *h = &hdev->conn_hash;
 666         switch (type) {
 667         case ACL_LINK:
 668                 return h->acl_num;
 669         case AMP_LINK:
 670                 return h->amp_num;
 671         case LE_LINK:
 672                 return h->le_num;
 673         case SCO_LINK:
 674         case ESCO_LINK:
 675                 return h->sco_num;
 676         default:
 677                 return 0;
 678         }
 679 }
 680
 681 static inline unsigned int hci_conn_count(struct hci_dev *hdev)
 682 {
 683         struct hci_conn_hash *c = &hdev->conn_hash;
 684
 685         return c->acl_num + c->amp_num + c->sco_num + c->le_num;
 686 }
 687
 688 static inline __u8 hci_conn_lookup_type(struct hci_dev *hdev, __u16 handle)
 689 {
 690         struct hci_conn_hash *h = &hdev->conn_hash;
 691         struct hci_conn *c;
 692         __u8 type = INVALID_LINK;
 693
 694         rcu_read_lock();
 695
 696         list_for_each_entry_rcu(c, &h->list, list) {
 697                 if (c->handle == handle) {
 698                         type = c->type;
 699                         break;
 700                 }
 701         }
 702
 703         rcu_read_unlock();
 704
 705         return type;
 706 }
 707
 708 static inline struct hci_conn *hci_conn_hash_lookup_handle(struct hci_dev *hdev,
 709                                                                 __u16 handle)
 710 {
 711         struct hci_conn_hash *h = &hdev->conn_hash;
 712         struct hci_conn  *c;
 713
 714         rcu_read_lock();
 715
 716         list_for_each_entry_rcu(c, &h->list, list) {
 717                 if (c->handle == handle) {
 718                         rcu_read_unlock();
 719                         return c;
 720                 }
 721         }
 722         rcu_read_unlock();
 723
 724         return NULL;
 725 }
 726
 727 static inline struct hci_conn *hci_conn_hash_lookup_ba(struct hci_dev *hdev,
 728                                                         __u8 type, bdaddr_t *ba)
 729 {
 730         struct hci_conn_hash *h = &hdev->conn_hash;
 731         struct hci_conn  *c;
 732
 733         rcu_read_lock();
 734
 735         list_for_each_entry_rcu(c, &h->list, list) {
 736                 if (c->type == type && !bacmp(&c->dst, ba)) {
 737                         rcu_read_unlock();
 738                         return c;
 739                 }
 740         }
 741
 742         rcu_read_unlock();
 743
 744         return NULL;
 745 }
 746
 747 static inline struct hci_conn *hci_conn_hash_lookup_state(struct hci_dev *hdev,
 748                                                         __u8 type, __u16 state)
 749 {
 750         struct hci_conn_hash *h = &hdev->conn_hash;
 751         struct hci_conn  *c;
 752
 753         rcu_read_lock();
 754
 755         list_for_each_entry_rcu(c, &h->list, list) {
 756                 if (c->type == type && c->state == state) {
 757                         rcu_read_unlock();
 758                         return c;
 759                 }
 760         }
 761
 762         rcu_read_unlock();
 763
 764         return NULL;
 765 }
 766
 767 int hci_disconnect(struct hci_conn *conn, __u8 reason);
 768 bool hci_setup_sync(struct hci_conn *conn, __u16 handle);
 769 void hci_sco_setup(struct hci_conn *conn, __u8 status);
 770
 771 struct hci_conn *hci_conn_add(struct hci_dev *hdev, int type, bdaddr_t *dst,
 772                               u8 role);
 773 int hci_conn_del(struct hci_conn *conn);
 774 void hci_conn_hash_flush(struct hci_dev *hdev);
 775 void hci_conn_check_pending(struct hci_dev *hdev);
 776
 777 struct hci_chan *hci_chan_create(struct hci_conn *conn);
 778 void hci_chan_del(struct hci_chan *chan);
 779 void hci_chan_list_flush(struct hci_conn *conn);
 780 struct hci_chan *hci_chan_lookup_handle(struct hci_dev *hdev, __u16 handle);
 781
 782 struct hci_conn *hci_connect_le(struct hci_dev *hdev, bdaddr_t *dst,
 783                                 u8 dst_type, u8 sec_level, u16 conn_timeout,
 784                                 u8 role);
 785 struct hci_conn *hci_connect_acl(struct hci_dev *hdev, bdaddr_t *dst,
 786                                  u8 sec_level, u8 auth_type);
 787 struct hci_conn *hci_connect_sco(struct hci_dev *hdev, int type, bdaddr_t *dst,
 788                                  __u16 setting);
 789 int hci_conn_check_link_mode(struct hci_conn *conn);
 790 int hci_conn_check_secure(struct hci_conn *conn, __u8 sec_level);
 791 int hci_conn_security(struct hci_conn *conn, __u8 sec_level, __u8 auth_type,
 792                       bool initiator);
 793 int hci_conn_switch_role(struct hci_conn *conn, __u8 role);
 794
 795 void hci_conn_enter_active_mode(struct hci_conn *conn, __u8 force_active);
 796
 797 void hci_le_conn_failed(struct hci_conn *conn, u8 status);
 798
 799 /*
 800  * hci_conn_get() and hci_conn_put() are used to control the life-time of an
 801  * "hci_conn" object. They do not guarantee that the hci_conn object is running,
 802  * working or anything else. They just guarantee that the object is available
 803  * and can be dereferenced. So you can use its locks, local variables and any
 804  * other constant data.
 805  * Before accessing runtime data, you _must_ lock the object and then check that
 806  * it is still running. As soon as you release the locks, the connection might
 807  * get dropped, though.
 808  *
 809  * On the other hand, hci_conn_hold() and hci_conn_drop() are used to control
 810  * how long the underlying connection is held. So every channel that runs on the
 811  * hci_conn object calls this to prevent the connection from disappearing. As
 812  * long as you hold a device, you must also guarantee that you have a valid
 813  * reference to the device via hci_conn_get() (or the initial reference from
 814  * hci_conn_add()).
 815  * The hold()/drop() ref-count is known to drop below 0 sometimes, which doesn't
 816  * break because nobody cares for that. But this means, we cannot use
 817  * _get()/_drop() in it, but require the caller to have a valid ref (FIXME).
 818  */
 819
 820 static inline struct hci_conn *hci_conn_get(struct hci_conn *conn)
 821 {
 822         get_device(&conn->dev);
 823         return conn;
 824 }
 825
 826 static inline void hci_conn_put(struct hci_conn *conn)
 827 {
 828         put_device(&conn->dev);
 829 }
 830
 831 static inline void hci_conn_hold(struct hci_conn *conn)
 832 {
 833         BT_DBG("hcon %p orig refcnt %d", conn, atomic_read(&conn->refcnt));
 834
 835         atomic_inc(&conn->refcnt);
 836         cancel_delayed_work(&conn->disc_work);
 837 }
 838
 839 static inline void hci_conn_drop(struct hci_conn *conn)
 840 {
 841         BT_DBG("hcon %p orig refcnt %d", conn, atomic_read(&conn->refcnt));
 842
 843         if (atomic_dec_and_test(&conn->refcnt)) {
 844                 unsigned long timeo;
 845
 846                 switch (conn->type) {
 847                 case ACL_LINK:
 848                 case LE_LINK:
 849                         cancel_delayed_work(&conn->idle_work);
 850                         if (conn->state == BT_CONNECTED) {
 851                                 timeo = conn->disc_timeout;
 852                                 if (!conn->out)
 853                                         timeo *= 2;
 854                         } else {
 855                                 timeo = 0;
 856                         }
 857                         break;
 858
 859                 case AMP_LINK:
 860                         timeo = conn->disc_timeout;
 861                         break;
 862
 863                 default:
 864                         timeo = 0;
 865                         break;
 866                 }
 867
 868                 cancel_delayed_work(&conn->disc_work);
 869                 queue_delayed_work(conn->hdev->workqueue,
 870                                    &conn->disc_work, timeo);
 871         }
 872 }
 873
 874 /* ----- HCI Devices ----- */
 875 static inline void hci_dev_put(struct hci_dev *d)
 876 {
 877         BT_DBG("%s orig refcnt %d", d->name,
 878                atomic_read(&d->dev.kobj.kref.refcount));
 879
 880         put_device(&d->dev);
 881 }
 882
 883 static inline struct hci_dev *hci_dev_hold(struct hci_dev *d)
 884 {
 885         BT_DBG("%s orig refcnt %d", d->name,
 886                atomic_read(&d->dev.kobj.kref.refcount));
 887
 888         get_device(&d->dev);
 889         return d;
 890 }
 891
 892 #define hci_dev_lock(d)         mutex_lock(&d->lock)
 893 #define hci_dev_unlock(d)       mutex_unlock(&d->lock)
 894
 895 #define to_hci_dev(d) container_of(d, struct hci_dev, dev)
 896 #define to_hci_conn(c) container_of(c, struct hci_conn, dev)
 897
 898 static inline void *hci_get_drvdata(struct hci_dev *hdev)
 899 {
 900         return dev_get_drvdata(&hdev->dev);
 901 }
 902
 903 static inline void hci_set_drvdata(struct hci_dev *hdev, void *data)
 904 {
 905         dev_set_drvdata(&hdev->dev, data);
 906 }
 907
 908 struct hci_dev *hci_dev_get(int index);
 909 struct hci_dev *hci_get_route(bdaddr_t *dst, bdaddr_t *src);
 910
 911 struct hci_dev *hci_alloc_dev(void);
 912 void hci_free_dev(struct hci_dev *hdev);
 913 int hci_register_dev(struct hci_dev *hdev);
 914 void hci_unregister_dev(struct hci_dev *hdev);
 915 int hci_suspend_dev(struct hci_dev *hdev);
 916 int hci_resume_dev(struct hci_dev *hdev);
 917 int hci_reset_dev(struct hci_dev *hdev);
 918 int hci_dev_open(__u16 dev);
 919 int hci_dev_close(__u16 dev);
 920 int hci_dev_reset(__u16 dev);
 921 int hci_dev_reset_stat(__u16 dev);
 922 int hci_dev_cmd(unsigned int cmd, void __user *arg);
 923 int hci_get_dev_list(void __user *arg);
 924 int hci_get_dev_info(void __user *arg);
 925 int hci_get_conn_list(void __user *arg);
 926 int hci_get_conn_info(struct hci_dev *hdev, void __user *arg);
 927 int hci_get_auth_info(struct hci_dev *hdev, void __user *arg);
 928 int hci_inquiry(void __user *arg);
 929
 930 struct bdaddr_list *hci_bdaddr_list_lookup(struct list_head *list,
 931                                            bdaddr_t *bdaddr, u8 type);
 932 int hci_bdaddr_list_add(struct list_head *list, bdaddr_t *bdaddr, u8 type);
 933 int hci_bdaddr_list_del(struct list_head *list, bdaddr_t *bdaddr, u8 type);
 934 void hci_bdaddr_list_clear(struct list_head *list);
 935
 936 struct hci_conn_params *hci_conn_params_lookup(struct hci_dev *hdev,
 937                                                bdaddr_t *addr, u8 addr_type);
 938 struct hci_conn_params *hci_conn_params_add(struct hci_dev *hdev,
 939                                             bdaddr_t *addr, u8 addr_type);
 940 void hci_conn_params_del(struct hci_dev *hdev, bdaddr_t *addr, u8 addr_type);
 941 void hci_conn_params_clear_all(struct hci_dev *hdev);
 942 void hci_conn_params_clear_disabled(struct hci_dev *hdev);
 943
 944 struct hci_conn_params *hci_pend_le_action_lookup(struct list_head *list,
 945                                                   bdaddr_t *addr,
 946                                                   u8 addr_type);
 947
 948 void hci_uuids_clear(struct hci_dev *hdev);
 949
 950 void hci_link_keys_clear(struct hci_dev *hdev);
 951 struct link_key *hci_find_link_key(struct hci_dev *hdev, bdaddr_t *bdaddr);
 952 struct link_key *hci_add_link_key(struct hci_dev *hdev, struct hci_conn *conn,
 953                                   bdaddr_t *bdaddr, u8 *val, u8 type,
 954                                   u8 pin_len, bool *persistent);
 955 struct smp_ltk *hci_add_ltk(struct hci_dev *hdev, bdaddr_t *bdaddr,
 956                             u8 addr_type, u8 type, u8 authenticated,
 957                             u8 tk[16], u8 enc_size, __le16 ediv, __le64 rand);
 958 struct smp_ltk *hci_find_ltk(struct hci_dev *hdev, bdaddr_t *bdaddr,
 959                              u8 addr_type, u8 role);
 960 int hci_remove_ltk(struct hci_dev *hdev, bdaddr_t *bdaddr, u8 bdaddr_type);
 961 void hci_smp_ltks_clear(struct hci_dev *hdev);
 962 int hci_remove_link_key(struct hci_dev *hdev, bdaddr_t *bdaddr);
 963
 964 struct smp_irk *hci_find_irk_by_rpa(struct hci_dev *hdev, bdaddr_t *rpa);
 965 struct smp_irk *hci_find_irk_by_addr(struct hci_dev *hdev, bdaddr_t *bdaddr,
 966                                      u8 addr_type);
 967 struct smp_irk *hci_add_irk(struct hci_dev *hdev, bdaddr_t *bdaddr,
 968                             u8 addr_type, u8 val[16], bdaddr_t *rpa);
 969 void hci_remove_irk(struct hci_dev *hdev, bdaddr_t *bdaddr, u8 addr_type);
 970 void hci_smp_irks_clear(struct hci_dev *hdev);
 971
 972 void hci_remote_oob_data_clear(struct hci_dev *hdev);
 973 struct oob_data *hci_find_remote_oob_data(struct hci_dev *hdev,
 974                                           bdaddr_t *bdaddr, u8 bdaddr_type);
 975 int hci_add_remote_oob_data(struct hci_dev *hdev, bdaddr_t *bdaddr,
 976                             u8 bdaddr_type, u8 *hash192, u8 *rand192,
 977                             u8 *hash256, u8 *rand256);
 978 int hci_remove_remote_oob_data(struct hci_dev *hdev, bdaddr_t *bdaddr,
 979                                u8 bdaddr_type);
 980
 981 void hci_event_packet(struct hci_dev *hdev, struct sk_buff *skb);
 982
 983 int hci_recv_frame(struct hci_dev *hdev, struct sk_buff *skb);
 984 int hci_recv_stream_fragment(struct hci_dev *hdev, void *data, int count);
 985
 986 void hci_init_sysfs(struct hci_dev *hdev);
 987 void hci_conn_init_sysfs(struct hci_conn *conn);
 988 void hci_conn_add_sysfs(struct hci_conn *conn);
 989 void hci_conn_del_sysfs(struct hci_conn *conn);
 990
 991 #define SET_HCIDEV_DEV(hdev, pdev) ((hdev)->dev.parent = (pdev))
 992
 993 /* ----- LMP capabilities ----- */
 994 #define lmp_encrypt_capable(dev)   ((dev)->features[0][0] & LMP_ENCRYPT)
 995 #define lmp_rswitch_capable(dev)   ((dev)->features[0][0] & LMP_RSWITCH)
 996 #define lmp_hold_capable(dev)      ((dev)->features[0][0] & LMP_HOLD)
 997 #define lmp_sniff_capable(dev)     ((dev)->features[0][0] & LMP_SNIFF)
 998 #define lmp_park_capable(dev)      ((dev)->features[0][1] & LMP_PARK)
 999 #define lmp_inq_rssi_capable(dev)  ((dev)->features[0][3] & LMP_RSSI_INQ)
1000 #define lmp_esco_capable(dev)      ((dev)->features[0][3] & LMP_ESCO)
1001 #define lmp_bredr_capable(dev)     (!((dev)->features[0][4] & LMP_NO_BREDR))
1002 #define lmp_le_capable(dev)        ((dev)->features[0][4] & LMP_LE)
1003 #define lmp_sniffsubr_capable(dev) ((dev)->features[0][5] & LMP_SNIFF_SUBR)
1004 #define lmp_pause_enc_capable(dev) ((dev)->features[0][5] & LMP_PAUSE_ENC)
1005 #define lmp_ext_inq_capable(dev)   ((dev)->features[0][6] & LMP_EXT_INQ)
1006 #define lmp_le_br_capable(dev)     (!!((dev)->features[0][6] & LMP_SIMUL_LE_BR))
1007 #define lmp_ssp_capable(dev)       ((dev)->features[0][6] & LMP_SIMPLE_PAIR)
1008 #define lmp_no_flush_capable(dev)  ((dev)->features[0][6] & LMP_NO_FLUSH)
1009 #define lmp_lsto_capable(dev)      ((dev)->features[0][7] & LMP_LSTO)
1010 #define lmp_inq_tx_pwr_capable(dev) ((dev)->features[0][7] & LMP_INQ_TX_PWR)
1011 #define lmp_ext_feat_capable(dev)  ((dev)->features[0][7] & LMP_EXTFEATURES)
1012 #define lmp_transp_capable(dev)    ((dev)->features[0][2] & LMP_TRANSPARENT)
1013
1014 /* ----- Extended LMP capabilities ----- */
1015 #define lmp_csb_master_capable(dev) ((dev)->features[2][0] & LMP_CSB_MASTER)
1016 #define lmp_csb_slave_capable(dev)  ((dev)->features[2][0] & LMP_CSB_SLAVE)
1017 #define lmp_sync_train_capable(dev) ((dev)->features[2][0] & LMP_SYNC_TRAIN)
1018 #define lmp_sync_scan_capable(dev)  ((dev)->features[2][0] & LMP_SYNC_SCAN)
1019 #define lmp_sc_capable(dev)         ((dev)->features[2][1] & LMP_SC)
1020 #define lmp_ping_capable(dev)       ((dev)->features[2][1] & LMP_PING)
1021
1022 /* ----- Host capabilities ----- */
1023 #define lmp_host_ssp_capable(dev)  ((dev)->features[1][0] & LMP_HOST_SSP)
1024 #define lmp_host_sc_capable(dev)   ((dev)->features[1][0] & LMP_HOST_SC)
1025 #define lmp_host_le_capable(dev)   (!!((dev)->features[1][0] & LMP_HOST_LE))
1026 #define lmp_host_le_br_capable(dev) (!!((dev)->features[1][0] & LMP_HOST_LE_BREDR))
1027
1028 #define hdev_is_powered(hdev) (test_bit(HCI_UP, &hdev->flags) && \
1029                                 !test_bit(HCI_AUTO_OFF, &hdev->dev_flags))
1030 #define bredr_sc_enabled(dev) (lmp_sc_capable(dev) && \
1031                                test_bit(HCI_SC_ENABLED, &(dev)->dev_flags))
1032
1033 /* ----- HCI protocols ----- */
1034 #define HCI_PROTO_DEFER             0x01
1035
1036 static inline int hci_proto_connect_ind(struct hci_dev *hdev, bdaddr_t *bdaddr,
1037                                         __u8 type, __u8 *flags)
1038 {
1039         switch (type) {
1040         case ACL_LINK:
1041                 return l2cap_connect_ind(hdev, bdaddr);
1042
1043         case SCO_LINK:
1044         case ESCO_LINK:
1045                 return sco_connect_ind(hdev, bdaddr, flags);
1046
1047         default:
1048                 BT_ERR("unknown link type %d", type);
1049                 return -EINVAL;
1050         }
1051 }
1052
1053 static inline void hci_proto_connect_cfm(struct hci_conn *conn, __u8 status)
1054 {
1055         switch (conn->type) {
1056         case ACL_LINK:
1057         case LE_LINK:
1058                 l2cap_connect_cfm(conn, status);
1059                 break;
1060
1061         case SCO_LINK:
1062         case ESCO_LINK:
1063                 sco_connect_cfm(conn, status);
1064                 break;
1065
1066         default:
1067                 BT_ERR("unknown link type %d", conn->type);
1068                 break;
1069         }
1070
1071         if (conn->connect_cfm_cb)
1072                 conn->connect_cfm_cb(conn, status);
1073 }
1074
1075 static inline int hci_proto_disconn_ind(struct hci_conn *conn)
1076 {
1077         if (conn->type != ACL_LINK && conn->type != LE_LINK)
1078                 return HCI_ERROR_REMOTE_USER_TERM;
1079
1080         return l2cap_disconn_ind(conn);
1081 }
1082
1083 static inline void hci_proto_disconn_cfm(struct hci_conn *conn, __u8 reason)
1084 {
1085         switch (conn->type) {
1086         case ACL_LINK:
1087         case LE_LINK:
1088                 l2cap_disconn_cfm(conn, reason);
1089                 break;
1090
1091         case SCO_LINK:
1092         case ESCO_LINK:
1093                 sco_disconn_cfm(conn, reason);
1094                 break;
1095
1096         /* L2CAP would be handled for BREDR chan */
1097         case AMP_LINK:
1098                 break;
1099
1100         default:
1101                 BT_ERR("unknown link type %d", conn->type);
1102                 break;
1103         }
1104
1105         if (conn->disconn_cfm_cb)
1106                 conn->disconn_cfm_cb(conn, reason);
1107 }
1108
1109 static inline void hci_proto_auth_cfm(struct hci_conn *conn, __u8 status)
1110 {
1111         __u8 encrypt;
1112
1113         if (conn->type != ACL_LINK && conn->type != LE_LINK)
1114                 return;
1115
1116         if (test_bit(HCI_CONN_ENCRYPT_PEND, &conn->flags))
1117                 return;
1118
1119         encrypt = test_bit(HCI_CONN_ENCRYPT, &conn->flags) ? 0x01 : 0x00;
1120         l2cap_security_cfm(conn, status, encrypt);
1121
1122         if (conn->security_cfm_cb)
1123                 conn->security_cfm_cb(conn, status);
1124 }
1125
1126 static inline void hci_proto_encrypt_cfm(struct hci_conn *conn, __u8 status,
1127                                                                 __u8 encrypt)
1128 {
1129         if (conn->type != ACL_LINK && conn->type != LE_LINK)
1130                 return;
1131
1132         l2cap_security_cfm(conn, status, encrypt);
1133
1134         if (conn->security_cfm_cb)
1135                 conn->security_cfm_cb(conn, status);
1136 }
1137
1138 /* ----- HCI callbacks ----- */
1139 struct hci_cb {
1140         struct list_head list;
1141
1142         char *name;
1143
1144         void (*security_cfm)    (struct hci_conn *conn, __u8 status,
1145                                                                 __u8 encrypt);
1146         void (*key_change_cfm)  (struct hci_conn *conn, __u8 status);
1147         void (*role_switch_cfm) (struct hci_conn *conn, __u8 status, __u8 role);
1148 };
1149
1150 static inline void hci_auth_cfm(struct hci_conn *conn, __u8 status)
1151 {
1152         struct hci_cb *cb;
1153         __u8 encrypt;
1154
1155         hci_proto_auth_cfm(conn, status);
1156
1157         if (test_bit(HCI_CONN_ENCRYPT_PEND, &conn->flags))
1158                 return;
1159
1160         encrypt = test_bit(HCI_CONN_ENCRYPT, &conn->flags) ? 0x01 : 0x00;
1161
1162         read_lock(&hci_cb_list_lock);
1163         list_for_each_entry(cb, &hci_cb_list, list) {
1164                 if (cb->security_cfm)
1165                         cb->security_cfm(conn, status, encrypt);
1166         }
1167         read_unlock(&hci_cb_list_lock);
1168 }
1169
1170 static inline void hci_encrypt_cfm(struct hci_conn *conn, __u8 status,
1171                                                                 __u8 encrypt)
1172 {
1173         struct hci_cb *cb;
1174
1175         if (conn->sec_level == BT_SECURITY_SDP)
1176                 conn->sec_level = BT_SECURITY_LOW;
1177
1178         if (conn->pending_sec_level > conn->sec_level)
1179                 conn->sec_level = conn->pending_sec_level;
1180
1181         hci_proto_encrypt_cfm(conn, status, encrypt);
1182
1183         read_lock(&hci_cb_list_lock);
1184         list_for_each_entry(cb, &hci_cb_list, list) {
1185                 if (cb->security_cfm)
1186                         cb->security_cfm(conn, status, encrypt);
1187         }
1188         read_unlock(&hci_cb_list_lock);
1189 }
1190
1191 static inline void hci_key_change_cfm(struct hci_conn *conn, __u8 status)
1192 {
1193         struct hci_cb *cb;
1194
1195         read_lock(&hci_cb_list_lock);
1196         list_for_each_entry(cb, &hci_cb_list, list) {
1197                 if (cb->key_change_cfm)
1198                         cb->key_change_cfm(conn, status);
1199         }
1200         read_unlock(&hci_cb_list_lock);
1201 }
1202
1203 static inline void hci_role_switch_cfm(struct hci_conn *conn, __u8 status,
1204                                                                 __u8 role)
1205 {
1206         struct hci_cb *cb;
1207
1208         read_lock(&hci_cb_list_lock);
1209         list_for_each_entry(cb, &hci_cb_list, list) {
1210                 if (cb->role_switch_cfm)
1211                         cb->role_switch_cfm(conn, status, role);
1212         }
1213         read_unlock(&hci_cb_list_lock);
1214 }
1215
1216 static inline bool eir_has_data_type(u8 *data, size_t data_len, u8 type)
1217 {
1218         size_t parsed = 0;
1219
1220         if (data_len < 2)
1221                 return false;
1222
1223         while (parsed < data_len - 1) {
1224                 u8 field_len = data[0];
1225
1226                 if (field_len == 0)
1227                         break;
1228
1229                 parsed += field_len + 1;
1230
1231                 if (parsed > data_len)
1232                         break;
1233
1234                 if (data[1] == type)
1235                         return true;
1236
1237                 data += field_len + 1;
1238         }
1239
1240         return false;
1241 }
1242
1243 static inline bool hci_bdaddr_is_rpa(bdaddr_t *bdaddr, u8 addr_type)
1244 {
1245         if (addr_type != ADDR_LE_DEV_RANDOM)
1246                 return false;
1247
1248         if ((bdaddr->b[5] & 0xc0) == 0x40)
1249                return true;
1250
1251         return false;
1252 }
1253
1254 static inline bool hci_is_identity_address(bdaddr_t *addr, u8 addr_type)
1255 {
1256         if (addr_type == ADDR_LE_DEV_PUBLIC)
1257                 return true;
1258
1259         /* Check for Random Static address type */
1260         if ((addr->b[5] & 0xc0) == 0xc0)
1261                 return true;
1262
1263         return false;
1264 }
1265
1266 static inline struct smp_irk *hci_get_irk(struct hci_dev *hdev,
1267                                           bdaddr_t *bdaddr, u8 addr_type)
1268 {
1269         if (!hci_bdaddr_is_rpa(bdaddr, addr_type))
1270                 return NULL;
1271
1272         return hci_find_irk_by_rpa(hdev, bdaddr);
1273 }
1274
1275 static inline int hci_check_conn_params(u16 min, u16 max, u16 latency,
1276                                         u16 to_multiplier)
1277 {
1278         u16 max_latency;
1279
1280         if (min > max || min < 6 || max > 3200)
1281                 return -EINVAL;
1282
1283         if (to_multiplier < 10 || to_multiplier > 3200)
1284                 return -EINVAL;
1285
1286         if (max >= to_multiplier * 8)
1287                 return -EINVAL;
1288
1289         max_latency = (to_multiplier * 8 / max) - 1;
1290         if (latency > 499 || latency > max_latency)
1291                 return -EINVAL;
1292
1293         return 0;
1294 }
1295
1296 int hci_register_cb(struct hci_cb *hcb);
1297 int hci_unregister_cb(struct hci_cb *hcb);
1298
1299 bool hci_req_pending(struct hci_dev *hdev);
1300
1301 struct sk_buff *__hci_cmd_sync(struct hci_dev *hdev, u16 opcode, u32 plen,
1302                                const void *param, u32 timeout);
1303 struct sk_buff *__hci_cmd_sync_ev(struct hci_dev *hdev, u16 opcode, u32 plen,
1304                                   const void *param, u8 event, u32 timeout);
1305
1306 int hci_send_cmd(struct hci_dev *hdev, __u16 opcode, __u32 plen,
1307                  const void *param);
1308 void hci_send_acl(struct hci_chan *chan, struct sk_buff *skb, __u16 flags);
1309 void hci_send_sco(struct hci_conn *conn, struct sk_buff *skb);
1310
1311 void *hci_sent_cmd_data(struct hci_dev *hdev, __u16 opcode);
1312
1313 /* ----- HCI Sockets ----- */
1314 void hci_send_to_sock(struct hci_dev *hdev, struct sk_buff *skb);
1315 void hci_send_to_control(struct sk_buff *skb, struct sock *skip_sk);
1316 void hci_send_to_monitor(struct hci_dev *hdev, struct sk_buff *skb);
1317
1318 void hci_sock_dev_event(struct hci_dev *hdev, int event);
1319
1320 /* Management interface */
1321 #define DISCOV_TYPE_BREDR               (BIT(BDADDR_BREDR))
1322 #define DISCOV_TYPE_LE                  (BIT(BDADDR_LE_PUBLIC) | \
1323                                          BIT(BDADDR_LE_RANDOM))
1324 #define DISCOV_TYPE_INTERLEAVED         (BIT(BDADDR_BREDR) | \
1325                                          BIT(BDADDR_LE_PUBLIC) | \
1326                                          BIT(BDADDR_LE_RANDOM))
1327
1328 /* These LE scan and inquiry parameters were chosen according to LE General
1329  * Discovery Procedure specification.
1330  */
1331 #define DISCOV_LE_SCAN_WIN              0x12
1332 #define DISCOV_LE_SCAN_INT              0x12
1333 #define DISCOV_LE_TIMEOUT               10240   /* msec */
1334 #define DISCOV_INTERLEAVED_TIMEOUT      5120    /* msec */
1335 #define DISCOV_INTERLEAVED_INQUIRY_LEN  0x04
1336 #define DISCOV_BREDR_INQUIRY_LEN        0x08
1337 #define DISCOV_LE_RESTART_DELAY         msecs_to_jiffies(200)   /* msec */
1338
1339 int mgmt_control(struct sock *sk, struct msghdr *msg, size_t len);
1340 int mgmt_new_settings(struct hci_dev *hdev);
1341 void mgmt_index_added(struct hci_dev *hdev);
1342 void mgmt_index_removed(struct hci_dev *hdev);
1343 void mgmt_set_powered_failed(struct hci_dev *hdev, int err);
1344 int mgmt_powered(struct hci_dev *hdev, u8 powered);
1345 int mgmt_update_adv_data(struct hci_dev *hdev);
1346 void mgmt_discoverable_timeout(struct hci_dev *hdev);
1347 void mgmt_new_link_key(struct hci_dev *hdev, struct link_key *key,
1348                        bool persistent);
1349 void mgmt_device_connected(struct hci_dev *hdev, struct hci_conn *conn,
1350                            u32 flags, u8 *name, u8 name_len);
1351 void mgmt_device_disconnected(struct hci_dev *hdev, bdaddr_t *bdaddr,
1352                               u8 link_type, u8 addr_type, u8 reason,
1353                               bool mgmt_connected);
1354 void mgmt_disconnect_failed(struct hci_dev *hdev, bdaddr_t *bdaddr,
1355                             u8 link_type, u8 addr_type, u8 status);
1356 void mgmt_connect_failed(struct hci_dev *hdev, bdaddr_t *bdaddr, u8 link_type,
1357                          u8 addr_type, u8 status);
1358 void mgmt_pin_code_request(struct hci_dev *hdev, bdaddr_t *bdaddr, u8 secure);
1359 void mgmt_pin_code_reply_complete(struct hci_dev *hdev, bdaddr_t *bdaddr,
1360                                   u8 status);
1361 void mgmt_pin_code_neg_reply_complete(struct hci_dev *hdev, bdaddr_t *bdaddr,
1362                                       u8 status);
1363 int mgmt_user_confirm_request(struct hci_dev *hdev, bdaddr_t *bdaddr,
1364                               u8 link_type, u8 addr_type, u32 value,
1365                               u8 confirm_hint);
1366 int mgmt_user_confirm_reply_complete(struct hci_dev *hdev, bdaddr_t *bdaddr,
1367                                      u8 link_type, u8 addr_type, u8 status);
1368 int mgmt_user_confirm_neg_reply_complete(struct hci_dev *hdev, bdaddr_t *bdaddr,
1369                                          u8 link_type, u8 addr_type, u8 status);
1370 int mgmt_user_passkey_request(struct hci_dev *hdev, bdaddr_t *bdaddr,
1371                               u8 link_type, u8 addr_type);
1372 int mgmt_user_passkey_reply_complete(struct hci_dev *hdev, bdaddr_t *bdaddr,
1373                                      u8 link_type, u8 addr_type, u8 status);
1374 int mgmt_user_passkey_neg_reply_complete(struct hci_dev *hdev, bdaddr_t *bdaddr,
1375                                          u8 link_type, u8 addr_type, u8 status);
1376 int mgmt_user_passkey_notify(struct hci_dev *hdev, bdaddr_t *bdaddr,
1377                              u8 link_type, u8 addr_type, u32 passkey,
1378                              u8 entered);
1379 void mgmt_auth_failed(struct hci_conn *conn, u8 status);
1380 void mgmt_auth_enable_complete(struct hci_dev *hdev, u8 status);
1381 void mgmt_ssp_enable_complete(struct hci_dev *hdev, u8 enable, u8 status);
1382 void mgmt_set_class_of_dev_complete(struct hci_dev *hdev, u8 *dev_class,
1383                                     u8 status);
1384 void mgmt_set_local_name_complete(struct hci_dev *hdev, u8 *name, u8 status);
1385 void mgmt_read_local_oob_data_complete(struct hci_dev *hdev, u8 *hash192,
1386                                        u8 *rand192, u8 *hash256, u8 *rand256,
1387                                        u8 status);
1388 void mgmt_device_found(struct hci_dev *hdev, bdaddr_t *bdaddr, u8 link_type,
1389                        u8 addr_type, u8 *dev_class, s8 rssi, u32 flags,
1390                        u8 *eir, u16 eir_len, u8 *scan_rsp, u8 scan_rsp_len);
1391 void mgmt_remote_name(struct hci_dev *hdev, bdaddr_t *bdaddr, u8 link_type,
1392                       u8 addr_type, s8 rssi, u8 *name, u8 name_len);
1393 void mgmt_discovering(struct hci_dev *hdev, u8 discovering);
1394 bool mgmt_powering_down(struct hci_dev *hdev);
1395 void mgmt_new_ltk(struct hci_dev *hdev, struct smp_ltk *key, bool persistent);
1396 void mgmt_new_irk(struct hci_dev *hdev, struct smp_irk *irk);
1397 void mgmt_new_csrk(struct hci_dev *hdev, struct smp_csrk *csrk,
1398                    bool persistent);
1399 void mgmt_new_conn_param(struct hci_dev *hdev, bdaddr_t *bdaddr,
1400                          u8 bdaddr_type, u8 store_hint, u16 min_interval,
1401                          u16 max_interval, u16 latency, u16 timeout);
1402 void mgmt_reenable_advertising(struct hci_dev *hdev);
1403 void mgmt_smp_complete(struct hci_conn *conn, bool complete);
1404
1405 u8 hci_le_conn_update(struct hci_conn *conn, u16 min, u16 max, u16 latency,
1406                       u16 to_multiplier);
1407 void hci_le_start_enc(struct hci_conn *conn, __le16 ediv, __le64 rand,
1408                                                         __u8 ltk[16]);
1409
1410 void hci_copy_identity_address(struct hci_dev *hdev, bdaddr_t *bdaddr,
1411                                u8 *bdaddr_type);
1412
1413 #define SCO_AIRMODE_MASK       0x0003
1414 #define SCO_AIRMODE_CVSD       0x0000
1415 #define SCO_AIRMODE_TRANSP     0x0003
1416
1417 #endif /* __HCI_CORE_H */