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
  30 /* HCI priority */
  31 #define HCI_PRIO_MAX    7
  32
  33 /* HCI Core structures */
  34 struct inquiry_data {
  35         bdaddr_t        bdaddr;
  36         __u8            pscan_rep_mode;
  37         __u8            pscan_period_mode;
  38         __u8            pscan_mode;
  39         __u8            dev_class[3];
  40         __le16          clock_offset;
  41         __s8            rssi;
  42         __u8            ssp_mode;
  43 };
  44
  45 struct inquiry_entry {
  46         struct list_head        all;            /* inq_cache.all */
  47         struct list_head        list;           /* unknown or resolve */
  48         enum {
  49                 NAME_NOT_KNOWN,
  50                 NAME_NEEDED,
  51                 NAME_PENDING,
  52                 NAME_KNOWN,
  53         } name_state;
  54         __u32                   timestamp;
  55         struct inquiry_data     data;
  56 };
  57
  58 struct discovery_state {
  59         int                     type;
  60         enum {
  61                 DISCOVERY_STOPPED,
  62                 DISCOVERY_STARTING,
  63                 DISCOVERY_FINDING,
  64                 DISCOVERY_RESOLVING,
  65                 DISCOVERY_STOPPING,
  66         } state;
  67         struct list_head        all;    /* All devices found during inquiry */
  68         struct list_head        unknown;        /* Name state not known */
  69         struct list_head        resolve;        /* Name needs to be resolved */
  70         __u32                   timestamp;
  71 };
  72
  73 struct hci_conn_hash {
  74         struct list_head list;
  75         unsigned int     acl_num;
  76         unsigned int     amp_num;
  77         unsigned int     sco_num;
  78         unsigned int     le_num;
  79 };
  80
  81 struct bdaddr_list {
  82         struct list_head list;
  83         bdaddr_t bdaddr;
  84 };
  85
  86 struct bt_uuid {
  87         struct list_head list;
  88         u8 uuid[16];
  89         u8 svc_hint;
  90 };
  91
  92 struct smp_ltk {
  93         struct list_head list;
  94         bdaddr_t bdaddr;
  95         u8 bdaddr_type;
  96         u8 authenticated;
  97         u8 type;
  98         u8 enc_size;
  99         __le16 ediv;
 100         u8 rand[8];
 101         u8 val[16];
 102 } __packed;
 103
 104 struct link_key {
 105         struct list_head list;
 106         bdaddr_t bdaddr;
 107         u8 type;
 108         u8 val[HCI_LINK_KEY_SIZE];
 109         u8 pin_len;
 110 };
 111
 112 struct oob_data {
 113         struct list_head list;
 114         bdaddr_t bdaddr;
 115         u8 hash[16];
 116         u8 randomizer[16];
 117 };
 118
 119 struct le_scan_params {
 120         u8 type;
 121         u16 interval;
 122         u16 window;
 123         int timeout;
 124 };
 125
 126 #define HCI_MAX_SHORT_NAME_LENGTH       10
 127
 128 struct amp_assoc {
 129         __u16   len;
 130         __u16   offset;
 131         __u16   rem_len;
 132         __u16   len_so_far;
 133         __u8    data[HCI_MAX_AMP_ASSOC_SIZE];
 134 };
 135
 136 #define NUM_REASSEMBLY 4
 137 struct hci_dev {
 138         struct list_head list;
 139         struct mutex    lock;
 140
 141         char            name[8];
 142         unsigned long   flags;
 143         __u16           id;
 144         __u8            bus;
 145         __u8            dev_type;
 146         bdaddr_t        bdaddr;
 147         __u8            dev_name[HCI_MAX_NAME_LENGTH];
 148         __u8            short_name[HCI_MAX_SHORT_NAME_LENGTH];
 149         __u8            eir[HCI_MAX_EIR_LENGTH];
 150         __u8            dev_class[3];
 151         __u8            major_class;
 152         __u8            minor_class;
 153         __u8            features[8];
 154         __u8            host_features[8];
 155         __u8            commands[64];
 156         __u8            hci_ver;
 157         __u16           hci_rev;
 158         __u8            lmp_ver;
 159         __u16           manufacturer;
 160         __u16           lmp_subver;
 161         __u16           voice_setting;
 162         __u8            io_capability;
 163         __s8            inq_tx_power;
 164         __u16           devid_source;
 165         __u16           devid_vendor;
 166         __u16           devid_product;
 167         __u16           devid_version;
 168
 169         __u16           pkt_type;
 170         __u16           esco_type;
 171         __u16           link_policy;
 172         __u16           link_mode;
 173
 174         __u32           idle_timeout;
 175         __u16           sniff_min_interval;
 176         __u16           sniff_max_interval;
 177
 178         __u8            amp_status;
 179         __u32           amp_total_bw;
 180         __u32           amp_max_bw;
 181         __u32           amp_min_latency;
 182         __u32           amp_max_pdu;
 183         __u8            amp_type;
 184         __u16           amp_pal_cap;
 185         __u16           amp_assoc_size;
 186         __u32           amp_max_flush_to;
 187         __u32           amp_be_flush_to;
 188
 189         struct amp_assoc        loc_assoc;
 190
 191         __u8            flow_ctl_mode;
 192
 193         unsigned int    auto_accept_delay;
 194
 195         unsigned long   quirks;
 196
 197         atomic_t        cmd_cnt;
 198         unsigned int    acl_cnt;
 199         unsigned int    sco_cnt;
 200         unsigned int    le_cnt;
 201
 202         unsigned int    acl_mtu;
 203         unsigned int    sco_mtu;
 204         unsigned int    le_mtu;
 205         unsigned int    acl_pkts;
 206         unsigned int    sco_pkts;
 207         unsigned int    le_pkts;
 208
 209         __u16           block_len;
 210         __u16           block_mtu;
 211         __u16           num_blocks;
 212         __u16           block_cnt;
 213
 214         unsigned long   acl_last_tx;
 215         unsigned long   sco_last_tx;
 216         unsigned long   le_last_tx;
 217
 218         struct workqueue_struct *workqueue;
 219
 220         struct work_struct      power_on;
 221         struct delayed_work     power_off;
 222
 223         __u16                   discov_timeout;
 224         struct delayed_work     discov_off;
 225
 226         struct delayed_work     service_cache;
 227
 228         struct timer_list       cmd_timer;
 229
 230         struct work_struct      rx_work;
 231         struct work_struct      cmd_work;
 232         struct work_struct      tx_work;
 233
 234         struct sk_buff_head     rx_q;
 235         struct sk_buff_head     raw_q;
 236         struct sk_buff_head     cmd_q;
 237
 238         struct sk_buff          *sent_cmd;
 239         struct sk_buff          *reassembly[NUM_REASSEMBLY];
 240
 241         struct mutex            req_lock;
 242         wait_queue_head_t       req_wait_q;
 243         __u32                   req_status;
 244         __u32                   req_result;
 245
 246         __u16                   init_last_cmd;
 247
 248         struct list_head        mgmt_pending;
 249
 250         struct discovery_state  discovery;
 251         struct hci_conn_hash    conn_hash;
 252         struct list_head        blacklist;
 253
 254         struct list_head        uuids;
 255
 256         struct list_head        link_keys;
 257
 258         struct list_head        long_term_keys;
 259
 260         struct list_head        remote_oob_data;
 261
 262         struct hci_dev_stats    stat;
 263
 264         struct sk_buff_head     driver_init;
 265
 266         atomic_t                promisc;
 267
 268         struct dentry           *debugfs;
 269
 270         struct device           dev;
 271
 272         struct rfkill           *rfkill;
 273
 274         unsigned long           dev_flags;
 275
 276         struct delayed_work     le_scan_disable;
 277
 278         struct work_struct      le_scan;
 279         struct le_scan_params   le_scan_params;
 280
 281         __s8                    adv_tx_power;
 282
 283         int (*open)(struct hci_dev *hdev);
 284         int (*close)(struct hci_dev *hdev);
 285         int (*flush)(struct hci_dev *hdev);
 286         int (*send)(struct sk_buff *skb);
 287         void (*notify)(struct hci_dev *hdev, unsigned int evt);
 288         int (*ioctl)(struct hci_dev *hdev, unsigned int cmd, unsigned long arg);
 289 };
 290
 291 #define HCI_PHY_HANDLE(handle)  (handle & 0xff)
 292
 293 struct hci_conn {
 294         struct list_head list;
 295
 296         atomic_t        refcnt;
 297
 298         bdaddr_t        dst;
 299         __u8            dst_type;
 300         __u16           handle;
 301         __u16           state;
 302         __u8            mode;
 303         __u8            type;
 304         bool            out;
 305         __u8            attempt;
 306         __u8            dev_class[3];
 307         __u8            features[8];
 308         __u16           interval;
 309         __u16           pkt_type;
 310         __u16           link_policy;
 311         __u32           link_mode;
 312         __u8            key_type;
 313         __u8            auth_type;
 314         __u8            sec_level;
 315         __u8            pending_sec_level;
 316         __u8            pin_length;
 317         __u8            enc_key_size;
 318         __u8            io_capability;
 319         __u32           passkey_notify;
 320         __u8            passkey_entered;
 321         __u16           disc_timeout;
 322         unsigned long   flags;
 323
 324         __u8            remote_cap;
 325         __u8            remote_auth;
 326         __u8            remote_id;
 327         bool            flush_key;
 328
 329         unsigned int    sent;
 330
 331         struct sk_buff_head data_q;
 332         struct list_head chan_list;
 333
 334         struct delayed_work disc_work;
 335         struct timer_list idle_timer;
 336         struct timer_list auto_accept_timer;
 337
 338         struct device   dev;
 339         atomic_t        devref;
 340
 341         struct hci_dev  *hdev;
 342         void            *l2cap_data;
 343         void            *sco_data;
 344         void            *smp_conn;
 345         struct amp_mgr  *amp_mgr;
 346
 347         struct hci_conn *link;
 348
 349         void (*connect_cfm_cb)  (struct hci_conn *conn, u8 status);
 350         void (*security_cfm_cb) (struct hci_conn *conn, u8 status);
 351         void (*disconn_cfm_cb)  (struct hci_conn *conn, u8 reason);
 352 };
 353
 354 struct hci_chan {
 355         struct list_head list;
 356         __u16 handle;
 357         struct hci_conn *conn;
 358         struct sk_buff_head data_q;
 359         unsigned int    sent;
 360         __u8            state;
 361 };
 362
 363 extern struct list_head hci_dev_list;
 364 extern struct list_head hci_cb_list;
 365 extern rwlock_t hci_dev_list_lock;
 366 extern rwlock_t hci_cb_list_lock;
 367
 368 /* ----- HCI interface to upper protocols ----- */
 369 extern int l2cap_connect_ind(struct hci_dev *hdev, bdaddr_t *bdaddr);
 370 extern void l2cap_connect_cfm(struct hci_conn *hcon, u8 status);
 371 extern int l2cap_disconn_ind(struct hci_conn *hcon);
 372 extern void l2cap_disconn_cfm(struct hci_conn *hcon, u8 reason);
 373 extern int l2cap_security_cfm(struct hci_conn *hcon, u8 status, u8 encrypt);
 374 extern int l2cap_recv_acldata(struct hci_conn *hcon, struct sk_buff *skb,
 375                               u16 flags);
 376
 377 extern int sco_connect_ind(struct hci_dev *hdev, bdaddr_t *bdaddr);
 378 extern void sco_connect_cfm(struct hci_conn *hcon, __u8 status);
 379 extern void sco_disconn_cfm(struct hci_conn *hcon, __u8 reason);
 380 extern int sco_recv_scodata(struct hci_conn *hcon, struct sk_buff *skb);
 381
 382 /* ----- Inquiry cache ----- */
 383 #define INQUIRY_CACHE_AGE_MAX   (HZ*30)   /* 30 seconds */
 384 #define INQUIRY_ENTRY_AGE_MAX   (HZ*60)   /* 60 seconds */
 385
 386 static inline void discovery_init(struct hci_dev *hdev)
 387 {
 388         hdev->discovery.state = DISCOVERY_STOPPED;
 389         INIT_LIST_HEAD(&hdev->discovery.all);
 390         INIT_LIST_HEAD(&hdev->discovery.unknown);
 391         INIT_LIST_HEAD(&hdev->discovery.resolve);
 392 }
 393
 394 bool hci_discovery_active(struct hci_dev *hdev);
 395
 396 void hci_discovery_set_state(struct hci_dev *hdev, int state);
 397
 398 static inline int inquiry_cache_empty(struct hci_dev *hdev)
 399 {
 400         return list_empty(&hdev->discovery.all);
 401 }
 402
 403 static inline long inquiry_cache_age(struct hci_dev *hdev)
 404 {
 405         struct discovery_state *c = &hdev->discovery;
 406         return jiffies - c->timestamp;
 407 }
 408
 409 static inline long inquiry_entry_age(struct inquiry_entry *e)
 410 {
 411         return jiffies - e->timestamp;
 412 }
 413
 414 struct inquiry_entry *hci_inquiry_cache_lookup(struct hci_dev *hdev,
 415                                                bdaddr_t *bdaddr);
 416 struct inquiry_entry *hci_inquiry_cache_lookup_unknown(struct hci_dev *hdev,
 417                                                        bdaddr_t *bdaddr);
 418 struct inquiry_entry *hci_inquiry_cache_lookup_resolve(struct hci_dev *hdev,
 419                                                        bdaddr_t *bdaddr,
 420                                                        int state);
 421 void hci_inquiry_cache_update_resolve(struct hci_dev *hdev,
 422                                       struct inquiry_entry *ie);
 423 bool hci_inquiry_cache_update(struct hci_dev *hdev, struct inquiry_data *data,
 424                               bool name_known, bool *ssp);
 425
 426 /* ----- HCI Connections ----- */
 427 enum {
 428         HCI_CONN_AUTH_PEND,
 429         HCI_CONN_REAUTH_PEND,
 430         HCI_CONN_ENCRYPT_PEND,
 431         HCI_CONN_RSWITCH_PEND,
 432         HCI_CONN_MODE_CHANGE_PEND,
 433         HCI_CONN_SCO_SETUP_PEND,
 434         HCI_CONN_LE_SMP_PEND,
 435         HCI_CONN_MGMT_CONNECTED,
 436         HCI_CONN_SSP_ENABLED,
 437         HCI_CONN_POWER_SAVE,
 438         HCI_CONN_REMOTE_OOB,
 439 };
 440
 441 static inline bool hci_conn_ssp_enabled(struct hci_conn *conn)
 442 {
 443         struct hci_dev *hdev = conn->hdev;
 444         return test_bit(HCI_SSP_ENABLED, &hdev->dev_flags) &&
 445                test_bit(HCI_CONN_SSP_ENABLED, &conn->flags);
 446 }
 447
 448 static inline void hci_conn_hash_add(struct hci_dev *hdev, struct hci_conn *c)
 449 {
 450         struct hci_conn_hash *h = &hdev->conn_hash;
 451         list_add_rcu(&c->list, &h->list);
 452         switch (c->type) {
 453         case ACL_LINK:
 454                 h->acl_num++;
 455                 break;
 456         case AMP_LINK:
 457                 h->amp_num++;
 458                 break;
 459         case LE_LINK:
 460                 h->le_num++;
 461                 break;
 462         case SCO_LINK:
 463         case ESCO_LINK:
 464                 h->sco_num++;
 465                 break;
 466         }
 467 }
 468
 469 static inline void hci_conn_hash_del(struct hci_dev *hdev, struct hci_conn *c)
 470 {
 471         struct hci_conn_hash *h = &hdev->conn_hash;
 472
 473         list_del_rcu(&c->list);
 474         synchronize_rcu();
 475
 476         switch (c->type) {
 477         case ACL_LINK:
 478                 h->acl_num--;
 479                 break;
 480         case AMP_LINK:
 481                 h->amp_num--;
 482                 break;
 483         case LE_LINK:
 484                 h->le_num--;
 485                 break;
 486         case SCO_LINK:
 487         case ESCO_LINK:
 488                 h->sco_num--;
 489                 break;
 490         }
 491 }
 492
 493 static inline unsigned int hci_conn_num(struct hci_dev *hdev, __u8 type)
 494 {
 495         struct hci_conn_hash *h = &hdev->conn_hash;
 496         switch (type) {
 497         case ACL_LINK:
 498                 return h->acl_num;
 499         case AMP_LINK:
 500                 return h->amp_num;
 501         case LE_LINK:
 502                 return h->le_num;
 503         case SCO_LINK:
 504         case ESCO_LINK:
 505                 return h->sco_num;
 506         default:
 507                 return 0;
 508         }
 509 }
 510
 511 static inline struct hci_conn *hci_conn_hash_lookup_handle(struct hci_dev *hdev,
 512                                                                 __u16 handle)
 513 {
 514         struct hci_conn_hash *h = &hdev->conn_hash;
 515         struct hci_conn  *c;
 516
 517         rcu_read_lock();
 518
 519         list_for_each_entry_rcu(c, &h->list, list) {
 520                 if (c->handle == handle) {
 521                         rcu_read_unlock();
 522                         return c;
 523                 }
 524         }
 525         rcu_read_unlock();
 526
 527         return NULL;
 528 }
 529
 530 static inline struct hci_conn *hci_conn_hash_lookup_ba(struct hci_dev *hdev,
 531                                                         __u8 type, bdaddr_t *ba)
 532 {
 533         struct hci_conn_hash *h = &hdev->conn_hash;
 534         struct hci_conn  *c;
 535
 536         rcu_read_lock();
 537
 538         list_for_each_entry_rcu(c, &h->list, list) {
 539                 if (c->type == type && !bacmp(&c->dst, ba)) {
 540                         rcu_read_unlock();
 541                         return c;
 542                 }
 543         }
 544
 545         rcu_read_unlock();
 546
 547         return NULL;
 548 }
 549
 550 static inline struct hci_conn *hci_conn_hash_lookup_state(struct hci_dev *hdev,
 551                                                         __u8 type, __u16 state)
 552 {
 553         struct hci_conn_hash *h = &hdev->conn_hash;
 554         struct hci_conn  *c;
 555
 556         rcu_read_lock();
 557
 558         list_for_each_entry_rcu(c, &h->list, list) {
 559                 if (c->type == type && c->state == state) {
 560                         rcu_read_unlock();
 561                         return c;
 562                 }
 563         }
 564
 565         rcu_read_unlock();
 566
 567         return NULL;
 568 }
 569
 570 void hci_acl_disconn(struct hci_conn *conn, __u8 reason);
 571 void hci_setup_sync(struct hci_conn *conn, __u16 handle);
 572 void hci_sco_setup(struct hci_conn *conn, __u8 status);
 573
 574 struct hci_conn *hci_conn_add(struct hci_dev *hdev, int type, bdaddr_t *dst);
 575 int hci_conn_del(struct hci_conn *conn);
 576 void hci_conn_hash_flush(struct hci_dev *hdev);
 577 void hci_conn_check_pending(struct hci_dev *hdev);
 578
 579 struct hci_chan *hci_chan_create(struct hci_conn *conn);
 580 void hci_chan_del(struct hci_chan *chan);
 581 void hci_chan_list_flush(struct hci_conn *conn);
 582 struct hci_chan *hci_chan_lookup_handle(struct hci_dev *hdev, __u16 handle);
 583
 584 struct hci_conn *hci_connect(struct hci_dev *hdev, int type, bdaddr_t *dst,
 585                              __u8 dst_type, __u8 sec_level, __u8 auth_type);
 586 int hci_conn_check_link_mode(struct hci_conn *conn);
 587 int hci_conn_check_secure(struct hci_conn *conn, __u8 sec_level);
 588 int hci_conn_security(struct hci_conn *conn, __u8 sec_level, __u8 auth_type);
 589 int hci_conn_change_link_key(struct hci_conn *conn);
 590 int hci_conn_switch_role(struct hci_conn *conn, __u8 role);
 591
 592 void hci_conn_enter_active_mode(struct hci_conn *conn, __u8 force_active);
 593
 594 void hci_conn_hold_device(struct hci_conn *conn);
 595 void hci_conn_put_device(struct hci_conn *conn);
 596
 597 static inline void hci_conn_hold(struct hci_conn *conn)
 598 {
 599         BT_DBG("hcon %p orig refcnt %d", conn, atomic_read(&conn->refcnt));
 600
 601         atomic_inc(&conn->refcnt);
 602         cancel_delayed_work(&conn->disc_work);
 603 }
 604
 605 static inline void hci_conn_put(struct hci_conn *conn)
 606 {
 607         BT_DBG("hcon %p orig refcnt %d", conn, atomic_read(&conn->refcnt));
 608
 609         if (atomic_dec_and_test(&conn->refcnt)) {
 610                 unsigned long timeo;
 611
 612                 switch (conn->type) {
 613                 case ACL_LINK:
 614                 case LE_LINK:
 615                         del_timer(&conn->idle_timer);
 616                         if (conn->state == BT_CONNECTED) {
 617                                 timeo = conn->disc_timeout;
 618                                 if (!conn->out)
 619                                         timeo *= 2;
 620                         } else {
 621                                 timeo = msecs_to_jiffies(10);
 622                         }
 623                         break;
 624
 625                 case AMP_LINK:
 626                         timeo = conn->disc_timeout;
 627                         break;
 628
 629                 default:
 630                         timeo = msecs_to_jiffies(10);
 631                         break;
 632                 }
 633
 634                 cancel_delayed_work(&conn->disc_work);
 635                 queue_delayed_work(conn->hdev->workqueue,
 636                                    &conn->disc_work, timeo);
 637         }
 638 }
 639
 640 /* ----- HCI Devices ----- */
 641 static inline void hci_dev_put(struct hci_dev *d)
 642 {
 643         BT_DBG("%s orig refcnt %d", d->name,
 644                atomic_read(&d->dev.kobj.kref.refcount));
 645
 646         put_device(&d->dev);
 647 }
 648
 649 static inline struct hci_dev *hci_dev_hold(struct hci_dev *d)
 650 {
 651         BT_DBG("%s orig refcnt %d", d->name,
 652                atomic_read(&d->dev.kobj.kref.refcount));
 653
 654         get_device(&d->dev);
 655         return d;
 656 }
 657
 658 #define hci_dev_lock(d)         mutex_lock(&d->lock)
 659 #define hci_dev_unlock(d)       mutex_unlock(&d->lock)
 660
 661 #define to_hci_dev(d) container_of(d, struct hci_dev, dev)
 662 #define to_hci_conn(c) container_of(c, struct hci_conn, dev)
 663
 664 static inline void *hci_get_drvdata(struct hci_dev *hdev)
 665 {
 666         return dev_get_drvdata(&hdev->dev);
 667 }
 668
 669 static inline void hci_set_drvdata(struct hci_dev *hdev, void *data)
 670 {
 671         dev_set_drvdata(&hdev->dev, data);
 672 }
 673
 674 /* hci_dev_list shall be locked */
 675 static inline uint8_t __hci_num_ctrl(void)
 676 {
 677         uint8_t count = 0;
 678         struct list_head *p;
 679
 680         list_for_each(p, &hci_dev_list) {
 681                 count++;
 682         }
 683
 684         return count;
 685 }
 686
 687 struct hci_dev *hci_dev_get(int index);
 688 struct hci_dev *hci_get_route(bdaddr_t *dst, bdaddr_t *src);
 689
 690 struct hci_dev *hci_alloc_dev(void);
 691 void hci_free_dev(struct hci_dev *hdev);
 692 int hci_register_dev(struct hci_dev *hdev);
 693 void hci_unregister_dev(struct hci_dev *hdev);
 694 int hci_suspend_dev(struct hci_dev *hdev);
 695 int hci_resume_dev(struct hci_dev *hdev);
 696 int hci_dev_open(__u16 dev);
 697 int hci_dev_close(__u16 dev);
 698 int hci_dev_reset(__u16 dev);
 699 int hci_dev_reset_stat(__u16 dev);
 700 int hci_dev_cmd(unsigned int cmd, void __user *arg);
 701 int hci_get_dev_list(void __user *arg);
 702 int hci_get_dev_info(void __user *arg);
 703 int hci_get_conn_list(void __user *arg);
 704 int hci_get_conn_info(struct hci_dev *hdev, void __user *arg);
 705 int hci_get_auth_info(struct hci_dev *hdev, void __user *arg);
 706 int hci_inquiry(void __user *arg);
 707
 708 struct bdaddr_list *hci_blacklist_lookup(struct hci_dev *hdev,
 709                                          bdaddr_t *bdaddr);
 710 int hci_blacklist_clear(struct hci_dev *hdev);
 711 int hci_blacklist_add(struct hci_dev *hdev, bdaddr_t *bdaddr, u8 type);
 712 int hci_blacklist_del(struct hci_dev *hdev, bdaddr_t *bdaddr, u8 type);
 713
 714 int hci_uuids_clear(struct hci_dev *hdev);
 715
 716 int hci_link_keys_clear(struct hci_dev *hdev);
 717 struct link_key *hci_find_link_key(struct hci_dev *hdev, bdaddr_t *bdaddr);
 718 int hci_add_link_key(struct hci_dev *hdev, struct hci_conn *conn, int new_key,
 719                      bdaddr_t *bdaddr, u8 *val, u8 type, u8 pin_len);
 720 struct smp_ltk *hci_find_ltk(struct hci_dev *hdev, __le16 ediv, u8 rand[8]);
 721 int hci_add_ltk(struct hci_dev *hdev, bdaddr_t *bdaddr, u8 addr_type, u8 type,
 722                 int new_key, u8 authenticated, u8 tk[16], u8 enc_size,
 723                 __le16 ediv, u8 rand[8]);
 724 struct smp_ltk *hci_find_ltk_by_addr(struct hci_dev *hdev, bdaddr_t *bdaddr,
 725                                      u8 addr_type);
 726 int hci_remove_ltk(struct hci_dev *hdev, bdaddr_t *bdaddr);
 727 int hci_smp_ltks_clear(struct hci_dev *hdev);
 728 int hci_remove_link_key(struct hci_dev *hdev, bdaddr_t *bdaddr);
 729
 730 int hci_remote_oob_data_clear(struct hci_dev *hdev);
 731 struct oob_data *hci_find_remote_oob_data(struct hci_dev *hdev,
 732                                                         bdaddr_t *bdaddr);
 733 int hci_add_remote_oob_data(struct hci_dev *hdev, bdaddr_t *bdaddr, u8 *hash,
 734                                                                 u8 *randomizer);
 735 int hci_remove_remote_oob_data(struct hci_dev *hdev, bdaddr_t *bdaddr);
 736
 737 void hci_event_packet(struct hci_dev *hdev, struct sk_buff *skb);
 738
 739 int hci_recv_frame(struct sk_buff *skb);
 740 int hci_recv_fragment(struct hci_dev *hdev, int type, void *data, int count);
 741 int hci_recv_stream_fragment(struct hci_dev *hdev, void *data, int count);
 742
 743 void hci_init_sysfs(struct hci_dev *hdev);
 744 int hci_add_sysfs(struct hci_dev *hdev);
 745 void hci_del_sysfs(struct hci_dev *hdev);
 746 void hci_conn_init_sysfs(struct hci_conn *conn);
 747 void hci_conn_add_sysfs(struct hci_conn *conn);
 748 void hci_conn_del_sysfs(struct hci_conn *conn);
 749
 750 #define SET_HCIDEV_DEV(hdev, pdev) ((hdev)->dev.parent = (pdev))
 751
 752 /* ----- LMP capabilities ----- */
 753 #define lmp_encrypt_capable(dev)   ((dev)->features[0] & LMP_ENCRYPT)
 754 #define lmp_rswitch_capable(dev)   ((dev)->features[0] & LMP_RSWITCH)
 755 #define lmp_hold_capable(dev)      ((dev)->features[0] & LMP_HOLD)
 756 #define lmp_sniff_capable(dev)     ((dev)->features[0] & LMP_SNIFF)
 757 #define lmp_park_capable(dev)      ((dev)->features[1] & LMP_PARK)
 758 #define lmp_inq_rssi_capable(dev)  ((dev)->features[3] & LMP_RSSI_INQ)
 759 #define lmp_esco_capable(dev)      ((dev)->features[3] & LMP_ESCO)
 760 #define lmp_bredr_capable(dev)     (!((dev)->features[4] & LMP_NO_BREDR))
 761 #define lmp_le_capable(dev)        ((dev)->features[4] & LMP_LE)
 762 #define lmp_sniffsubr_capable(dev) ((dev)->features[5] & LMP_SNIFF_SUBR)
 763 #define lmp_pause_enc_capable(dev) ((dev)->features[5] & LMP_PAUSE_ENC)
 764 #define lmp_ext_inq_capable(dev)   ((dev)->features[6] & LMP_EXT_INQ)
 765 #define lmp_le_br_capable(dev)     ((dev)->features[6] & LMP_SIMUL_LE_BR)
 766 #define lmp_ssp_capable(dev)       ((dev)->features[6] & LMP_SIMPLE_PAIR)
 767 #define lmp_no_flush_capable(dev)  ((dev)->features[6] & LMP_NO_FLUSH)
 768 #define lmp_lsto_capable(dev)      ((dev)->features[7] & LMP_LSTO)
 769 #define lmp_inq_tx_pwr_capable(dev) ((dev)->features[7] & LMP_INQ_TX_PWR)
 770 #define lmp_ext_feat_capable(dev)  ((dev)->features[7] & LMP_EXTFEATURES)
 771
 772 /* ----- Extended LMP capabilities ----- */
 773 #define lmp_host_ssp_capable(dev)  ((dev)->host_features[0] & LMP_HOST_SSP)
 774 #define lmp_host_le_capable(dev)   ((dev)->host_features[0] & LMP_HOST_LE)
 775 #define lmp_host_le_br_capable(dev) ((dev)->host_features[0] & LMP_HOST_LE_BREDR)
 776
 777 /* ----- HCI protocols ----- */
 778 static inline int hci_proto_connect_ind(struct hci_dev *hdev, bdaddr_t *bdaddr,
 779                                                                 __u8 type)
 780 {
 781         switch (type) {
 782         case ACL_LINK:
 783                 return l2cap_connect_ind(hdev, bdaddr);
 784
 785         case SCO_LINK:
 786         case ESCO_LINK:
 787                 return sco_connect_ind(hdev, bdaddr);
 788
 789         default:
 790                 BT_ERR("unknown link type %d", type);
 791                 return -EINVAL;
 792         }
 793 }
 794
 795 static inline void hci_proto_connect_cfm(struct hci_conn *conn, __u8 status)
 796 {
 797         switch (conn->type) {
 798         case ACL_LINK:
 799         case LE_LINK:
 800                 l2cap_connect_cfm(conn, status);
 801                 break;
 802
 803         case SCO_LINK:
 804         case ESCO_LINK:
 805                 sco_connect_cfm(conn, status);
 806                 break;
 807
 808         default:
 809                 BT_ERR("unknown link type %d", conn->type);
 810                 break;
 811         }
 812
 813         if (conn->connect_cfm_cb)
 814                 conn->connect_cfm_cb(conn, status);
 815 }
 816
 817 static inline int hci_proto_disconn_ind(struct hci_conn *conn)
 818 {
 819         if (conn->type != ACL_LINK && conn->type != LE_LINK)
 820                 return HCI_ERROR_REMOTE_USER_TERM;
 821
 822         return l2cap_disconn_ind(conn);
 823 }
 824
 825 static inline void hci_proto_disconn_cfm(struct hci_conn *conn, __u8 reason)
 826 {
 827         switch (conn->type) {
 828         case ACL_LINK:
 829         case LE_LINK:
 830                 l2cap_disconn_cfm(conn, reason);
 831                 break;
 832
 833         case SCO_LINK:
 834         case ESCO_LINK:
 835                 sco_disconn_cfm(conn, reason);
 836                 break;
 837
 838         /* L2CAP would be handled for BREDR chan */
 839         case AMP_LINK:
 840                 break;
 841
 842         default:
 843                 BT_ERR("unknown link type %d", conn->type);
 844                 break;
 845         }
 846
 847         if (conn->disconn_cfm_cb)
 848                 conn->disconn_cfm_cb(conn, reason);
 849 }
 850
 851 static inline void hci_proto_auth_cfm(struct hci_conn *conn, __u8 status)
 852 {
 853         __u8 encrypt;
 854
 855         if (conn->type != ACL_LINK && conn->type != LE_LINK)
 856                 return;
 857
 858         if (test_bit(HCI_CONN_ENCRYPT_PEND, &conn->flags))
 859                 return;
 860
 861         encrypt = (conn->link_mode & HCI_LM_ENCRYPT) ? 0x01 : 0x00;
 862         l2cap_security_cfm(conn, status, encrypt);
 863
 864         if (conn->security_cfm_cb)
 865                 conn->security_cfm_cb(conn, status);
 866 }
 867
 868 static inline void hci_proto_encrypt_cfm(struct hci_conn *conn, __u8 status,
 869                                                                 __u8 encrypt)
 870 {
 871         if (conn->type != ACL_LINK && conn->type != LE_LINK)
 872                 return;
 873
 874         l2cap_security_cfm(conn, status, encrypt);
 875
 876         if (conn->security_cfm_cb)
 877                 conn->security_cfm_cb(conn, status);
 878 }
 879
 880 /* ----- HCI callbacks ----- */
 881 struct hci_cb {
 882         struct list_head list;
 883
 884         char *name;
 885
 886         void (*security_cfm)    (struct hci_conn *conn, __u8 status,
 887                                                                 __u8 encrypt);
 888         void (*key_change_cfm)  (struct hci_conn *conn, __u8 status);
 889         void (*role_switch_cfm) (struct hci_conn *conn, __u8 status, __u8 role);
 890 };
 891
 892 static inline void hci_auth_cfm(struct hci_conn *conn, __u8 status)
 893 {
 894         struct hci_cb *cb;
 895         __u8 encrypt;
 896
 897         hci_proto_auth_cfm(conn, status);
 898
 899         if (test_bit(HCI_CONN_ENCRYPT_PEND, &conn->flags))
 900                 return;
 901
 902         encrypt = (conn->link_mode & HCI_LM_ENCRYPT) ? 0x01 : 0x00;
 903
 904         read_lock(&hci_cb_list_lock);
 905         list_for_each_entry(cb, &hci_cb_list, list) {
 906                 if (cb->security_cfm)
 907                         cb->security_cfm(conn, status, encrypt);
 908         }
 909         read_unlock(&hci_cb_list_lock);
 910 }
 911
 912 static inline void hci_encrypt_cfm(struct hci_conn *conn, __u8 status,
 913                                                                 __u8 encrypt)
 914 {
 915         struct hci_cb *cb;
 916
 917         if (conn->sec_level == BT_SECURITY_SDP)
 918                 conn->sec_level = BT_SECURITY_LOW;
 919
 920         if (conn->pending_sec_level > conn->sec_level)
 921                 conn->sec_level = conn->pending_sec_level;
 922
 923         hci_proto_encrypt_cfm(conn, status, encrypt);
 924
 925         read_lock(&hci_cb_list_lock);
 926         list_for_each_entry(cb, &hci_cb_list, list) {
 927                 if (cb->security_cfm)
 928                         cb->security_cfm(conn, status, encrypt);
 929         }
 930         read_unlock(&hci_cb_list_lock);
 931 }
 932
 933 static inline void hci_key_change_cfm(struct hci_conn *conn, __u8 status)
 934 {
 935         struct hci_cb *cb;
 936
 937         read_lock(&hci_cb_list_lock);
 938         list_for_each_entry(cb, &hci_cb_list, list) {
 939                 if (cb->key_change_cfm)
 940                         cb->key_change_cfm(conn, status);
 941         }
 942         read_unlock(&hci_cb_list_lock);
 943 }
 944
 945 static inline void hci_role_switch_cfm(struct hci_conn *conn, __u8 status,
 946                                                                 __u8 role)
 947 {
 948         struct hci_cb *cb;
 949
 950         read_lock(&hci_cb_list_lock);
 951         list_for_each_entry(cb, &hci_cb_list, list) {
 952                 if (cb->role_switch_cfm)
 953                         cb->role_switch_cfm(conn, status, role);
 954         }
 955         read_unlock(&hci_cb_list_lock);
 956 }
 957
 958 static inline bool eir_has_data_type(u8 *data, size_t data_len, u8 type)
 959 {
 960         size_t parsed = 0;
 961
 962         if (data_len < 2)
 963                 return false;
 964
 965         while (parsed < data_len - 1) {
 966                 u8 field_len = data[0];
 967
 968                 if (field_len == 0)
 969                         break;
 970
 971                 parsed += field_len + 1;
 972
 973                 if (parsed > data_len)
 974                         break;
 975
 976                 if (data[1] == type)
 977                         return true;
 978
 979                 data += field_len + 1;
 980         }
 981
 982         return false;
 983 }
 984
 985 static inline size_t eir_get_length(u8 *eir, size_t eir_len)
 986 {
 987         size_t parsed = 0;
 988
 989         while (parsed < eir_len) {
 990                 u8 field_len = eir[0];
 991
 992                 if (field_len == 0)
 993                         return parsed;
 994
 995                 parsed += field_len + 1;
 996                 eir += field_len + 1;
 997         }
 998
 999         return eir_len;
1000 }
1001
1002 static inline u16 eir_append_data(u8 *eir, u16 eir_len, u8 type, u8 *data,
1003                                   u8 data_len)
1004 {
1005         eir[eir_len++] = sizeof(type) + data_len;
1006         eir[eir_len++] = type;
1007         memcpy(&eir[eir_len], data, data_len);
1008         eir_len += data_len;
1009
1010         return eir_len;
1011 }
1012
1013 int hci_register_cb(struct hci_cb *hcb);
1014 int hci_unregister_cb(struct hci_cb *hcb);
1015
1016 int hci_send_cmd(struct hci_dev *hdev, __u16 opcode, __u32 plen, void *param);
1017 void hci_send_acl(struct hci_chan *chan, struct sk_buff *skb, __u16 flags);
1018 void hci_send_sco(struct hci_conn *conn, struct sk_buff *skb);
1019
1020 void *hci_sent_cmd_data(struct hci_dev *hdev, __u16 opcode);
1021
1022 /* ----- HCI Sockets ----- */
1023 void hci_send_to_sock(struct hci_dev *hdev, struct sk_buff *skb);
1024 void hci_send_to_control(struct sk_buff *skb, struct sock *skip_sk);
1025 void hci_send_to_monitor(struct hci_dev *hdev, struct sk_buff *skb);
1026
1027 void hci_sock_dev_event(struct hci_dev *hdev, int event);
1028
1029 /* Management interface */
1030 #define DISCOV_TYPE_BREDR               (BIT(BDADDR_BREDR))
1031 #define DISCOV_TYPE_LE                  (BIT(BDADDR_LE_PUBLIC) | \
1032                                          BIT(BDADDR_LE_RANDOM))
1033 #define DISCOV_TYPE_INTERLEAVED         (BIT(BDADDR_BREDR) | \
1034                                          BIT(BDADDR_LE_PUBLIC) | \
1035                                          BIT(BDADDR_LE_RANDOM))
1036
1037 int mgmt_control(struct sock *sk, struct msghdr *msg, size_t len);
1038 int mgmt_index_added(struct hci_dev *hdev);
1039 int mgmt_index_removed(struct hci_dev *hdev);
1040 int mgmt_powered(struct hci_dev *hdev, u8 powered);
1041 int mgmt_discoverable(struct hci_dev *hdev, u8 discoverable);
1042 int mgmt_connectable(struct hci_dev *hdev, u8 connectable);
1043 int mgmt_write_scan_failed(struct hci_dev *hdev, u8 scan, u8 status);
1044 int mgmt_new_link_key(struct hci_dev *hdev, struct link_key *key,
1045                       bool persistent);
1046 int mgmt_device_connected(struct hci_dev *hdev, bdaddr_t *bdaddr, u8 link_type,
1047                           u8 addr_type, u32 flags, u8 *name, u8 name_len,
1048                           u8 *dev_class);
1049 int mgmt_device_disconnected(struct hci_dev *hdev, bdaddr_t *bdaddr,
1050                              u8 link_type, u8 addr_type, u8 reason);
1051 int mgmt_disconnect_failed(struct hci_dev *hdev, bdaddr_t *bdaddr,
1052                            u8 link_type, u8 addr_type, u8 status);
1053 int mgmt_connect_failed(struct hci_dev *hdev, bdaddr_t *bdaddr, u8 link_type,
1054                         u8 addr_type, u8 status);
1055 int mgmt_pin_code_request(struct hci_dev *hdev, bdaddr_t *bdaddr, u8 secure);
1056 int mgmt_pin_code_reply_complete(struct hci_dev *hdev, bdaddr_t *bdaddr,
1057                                  u8 status);
1058 int mgmt_pin_code_neg_reply_complete(struct hci_dev *hdev, bdaddr_t *bdaddr,
1059                                      u8 status);
1060 int mgmt_user_confirm_request(struct hci_dev *hdev, bdaddr_t *bdaddr,
1061                               u8 link_type, u8 addr_type, __le32 value,
1062                               u8 confirm_hint);
1063 int mgmt_user_confirm_reply_complete(struct hci_dev *hdev, bdaddr_t *bdaddr,
1064                                      u8 link_type, u8 addr_type, u8 status);
1065 int mgmt_user_confirm_neg_reply_complete(struct hci_dev *hdev, bdaddr_t *bdaddr,
1066                                          u8 link_type, u8 addr_type, u8 status);
1067 int mgmt_user_passkey_request(struct hci_dev *hdev, bdaddr_t *bdaddr,
1068                               u8 link_type, u8 addr_type);
1069 int mgmt_user_passkey_reply_complete(struct hci_dev *hdev, bdaddr_t *bdaddr,
1070                                      u8 link_type, u8 addr_type, u8 status);
1071 int mgmt_user_passkey_neg_reply_complete(struct hci_dev *hdev, bdaddr_t *bdaddr,
1072                                          u8 link_type, u8 addr_type, u8 status);
1073 int mgmt_user_passkey_notify(struct hci_dev *hdev, bdaddr_t *bdaddr,
1074                              u8 link_type, u8 addr_type, u32 passkey,
1075                              u8 entered);
1076 int mgmt_auth_failed(struct hci_dev *hdev, bdaddr_t *bdaddr, u8 link_type,
1077                      u8 addr_type, u8 status);
1078 int mgmt_auth_enable_complete(struct hci_dev *hdev, u8 status);
1079 int mgmt_ssp_enable_complete(struct hci_dev *hdev, u8 enable, u8 status);
1080 int mgmt_set_class_of_dev_complete(struct hci_dev *hdev, u8 *dev_class,
1081                                    u8 status);
1082 int mgmt_set_local_name_complete(struct hci_dev *hdev, u8 *name, u8 status);
1083 int mgmt_read_local_oob_data_reply_complete(struct hci_dev *hdev, u8 *hash,
1084                                             u8 *randomizer, u8 status);
1085 int mgmt_le_enable_complete(struct hci_dev *hdev, u8 enable, u8 status);
1086 int mgmt_device_found(struct hci_dev *hdev, bdaddr_t *bdaddr, u8 link_type,
1087                       u8 addr_type, u8 *dev_class, s8 rssi, u8 cfm_name,
1088                       u8 ssp, u8 *eir, u16 eir_len);
1089 int mgmt_remote_name(struct hci_dev *hdev, bdaddr_t *bdaddr, u8 link_type,
1090                      u8 addr_type, s8 rssi, u8 *name, u8 name_len);
1091 int mgmt_start_discovery_failed(struct hci_dev *hdev, u8 status);
1092 int mgmt_stop_discovery_failed(struct hci_dev *hdev, u8 status);
1093 int mgmt_discovering(struct hci_dev *hdev, u8 discovering);
1094 int mgmt_interleaved_discovery(struct hci_dev *hdev);
1095 int mgmt_device_blocked(struct hci_dev *hdev, bdaddr_t *bdaddr, u8 type);
1096 int mgmt_device_unblocked(struct hci_dev *hdev, bdaddr_t *bdaddr, u8 type);
1097 bool mgmt_valid_hdev(struct hci_dev *hdev);
1098 int mgmt_new_ltk(struct hci_dev *hdev, struct smp_ltk *key, u8 persistent);
1099
1100 /* HCI info for socket */
1101 #define hci_pi(sk) ((struct hci_pinfo *) sk)
1102
1103 struct hci_pinfo {
1104         struct bt_sock    bt;
1105         struct hci_dev    *hdev;
1106         struct hci_filter filter;
1107         __u32             cmsg_mask;
1108         unsigned short   channel;
1109 };
1110
1111 /* HCI security filter */
1112 #define HCI_SFLT_MAX_OGF  5
1113
1114 struct hci_sec_filter {
1115         __u32 type_mask;
1116         __u32 event_mask[2];
1117         __u32 ocf_mask[HCI_SFLT_MAX_OGF + 1][4];
1118 };
1119
1120 /* ----- HCI requests ----- */
1121 #define HCI_REQ_DONE      0
1122 #define HCI_REQ_PEND      1
1123 #define HCI_REQ_CANCELED  2
1124
1125 #define hci_req_lock(d)         mutex_lock(&d->req_lock)
1126 #define hci_req_unlock(d)       mutex_unlock(&d->req_lock)
1127
1128 void hci_req_complete(struct hci_dev *hdev, __u16 cmd, int result);
1129
1130 void hci_le_conn_update(struct hci_conn *conn, u16 min, u16 max,
1131                                         u16 latency, u16 to_multiplier);
1132 void hci_le_start_enc(struct hci_conn *conn, __le16 ediv, __u8 rand[8],
1133                                                         __u8 ltk[16]);
1134 int hci_do_inquiry(struct hci_dev *hdev, u8 length);
1135 int hci_cancel_inquiry(struct hci_dev *hdev);
1136 int hci_le_scan(struct hci_dev *hdev, u8 type, u16 interval, u16 window,
1137                 int timeout);
1138 int hci_cancel_le_scan(struct hci_dev *hdev);
1139
1140 u8 bdaddr_to_le(u8 bdaddr_type);
1141
1142 #endif /* __HCI_CORE_H */