include/net/bluetooth/hci_core.h

   1 /*
   2    BlueZ - Bluetooth protocol stack for Linux
   3    Copyright (c) 2000-2001, 2010, Code Aurora Forum. All rights reserved.
   4
   5    Written 2000,2001 by Maxim Krasnyansky <maxk@qualcomm.com>
   6
   7    This program is free software; you can redistribute it and/or modify
   8    it under the terms of the GNU General Public License version 2 as
   9    published by the Free Software Foundation;
  10
  11    THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
  12    OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  13    FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT OF THIRD PARTY RIGHTS.
  14    IN NO EVENT SHALL THE COPYRIGHT HOLDER(S) AND AUTHOR(S) BE LIABLE FOR ANY
  15    CLAIM, OR ANY SPECIAL INDIRECT OR CONSEQUENTIAL DAMAGES, OR ANY DAMAGES
  16    WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
  17    ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
  18    OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
  19
  20    ALL LIABILITY, INCLUDING LIABILITY FOR INFRINGEMENT OF ANY PATENTS,
  21    COPYRIGHTS, TRADEMARKS OR OTHER RIGHTS, RELATING TO USE OF THIS
  22    SOFTWARE IS DISCLAIMED.
  23 */
  24
  25 #ifndef __HCI_CORE_H
  26 #define __HCI_CORE_H
  27
  28 #include <net/bluetooth/hci.h>
  29 #include <net/bluetooth/hci_sock.h>
  30
  31 /* HCI priority */
  32 #define HCI_PRIO_MAX    7
  33
  34 /* HCI Core structures */
  35 struct inquiry_data {
  36         bdaddr_t        bdaddr;
  37         __u8            pscan_rep_mode;
  38         __u8            pscan_period_mode;
  39         __u8            pscan_mode;
  40         __u8            dev_class[3];
  41         __le16          clock_offset;
  42         __s8            rssi;
  43         __u8            ssp_mode;
  44 };
  45
  46 struct inquiry_entry {
  47         struct list_head        all;            /* inq_cache.all */
  48         struct list_head        list;           /* unknown or resolve */
  49         enum {
  50                 NAME_NOT_KNOWN,
  51                 NAME_NEEDED,
  52                 NAME_PENDING,
  53                 NAME_KNOWN,
  54         } name_state;
  55         __u32                   timestamp;
  56         struct inquiry_data     data;
  57 };
  58
  59 struct discovery_state {
  60         int                     type;
  61         enum {
  62                 DISCOVERY_STOPPED,
  63                 DISCOVERY_STARTING,
  64                 DISCOVERY_FINDING,
  65                 DISCOVERY_RESOLVING,
  66                 DISCOVERY_STOPPING,
  67         } state;
  68         struct list_head        all;    /* All devices found during inquiry */
  69         struct list_head        unknown;        /* Name state not known */
  70         struct list_head        resolve;        /* Name needs to be resolved */
  71         __u32                   timestamp;
  72         bdaddr_t                last_adv_addr;
  73         u8                      last_adv_addr_type;
  74         s8                      last_adv_rssi;
  75         u32                     last_adv_flags;
  76         u8                      last_adv_data[HCI_MAX_AD_LENGTH];
  77         u8                      last_adv_data_len;
  78 };
  79
  80 struct hci_conn_hash {
  81         struct list_head list;
  82         unsigned int     acl_num;
  83         unsigned int     amp_num;
  84         unsigned int     sco_num;
  85         unsigned int     le_num;
  86         unsigned int     le_num_slave;
  87 };
  88
  89 struct bdaddr_list {
  90         struct list_head list;
  91         bdaddr_t bdaddr;
  92         u8 bdaddr_type;
  93 };
  94
  95 struct bt_uuid {
  96         struct list_head list;
  97         u8 uuid[16];
  98         u8 size;
  99         u8 svc_hint;
 100 };
 101
 102 struct smp_csrk {
 103         bdaddr_t bdaddr;
 104         u8 bdaddr_type;
 105         u8 master;
 106         u8 val[16];
 107 };
 108
 109 struct smp_ltk {
 110         struct list_head list;
 111         bdaddr_t bdaddr;
 112         u8 bdaddr_type;
 113         u8 authenticated;
 114         u8 type;
 115         u8 enc_size;
 116         __le16 ediv;
 117         __le64 rand;
 118         u8 val[16];
 119 };
 120
 121 struct smp_irk {
 122         struct list_head list;
 123         bdaddr_t rpa;
 124         bdaddr_t bdaddr;
 125         u8 addr_type;
 126         u8 val[16];
 127 };
 128
 129 struct link_key {
 130         struct list_head list;
 131         bdaddr_t bdaddr;
 132         u8 type;
 133         u8 val[HCI_LINK_KEY_SIZE];
 134         u8 pin_len;
 135 };
 136
 137 struct oob_data {
 138         struct list_head list;
 139         bdaddr_t bdaddr;
 140         u8 hash192[16];
 141         u8 randomizer192[16];
 142         u8 hash256[16];
 143         u8 randomizer256[16];
 144 };
 145
 146 #define HCI_MAX_SHORT_NAME_LENGTH       10
 147
 148 /* Default LE RPA expiry time, 15 minutes */
 149 #define HCI_DEFAULT_RPA_TIMEOUT         (15 * 60)
 150
 151 /* Default min/max age of connection information (1s/3s) */
 152 #define DEFAULT_CONN_INFO_MIN_AGE       1000
 153 #define DEFAULT_CONN_INFO_MAX_AGE       3000
 154
 155 struct amp_assoc {
 156         __u16   len;
 157         __u16   offset;
 158         __u16   rem_len;
 159         __u16   len_so_far;
 160         __u8    data[HCI_MAX_AMP_ASSOC_SIZE];
 161 };
 162
 163 #define HCI_MAX_PAGES   3
 164
 165 #define NUM_REASSEMBLY 4
 166 struct hci_dev {
 167         struct list_head list;
 168         struct mutex    lock;
 169
 170         char            name[8];
 171         unsigned long   flags;
 172         __u16           id;
 173         __u8            bus;
 174         __u8            dev_type;
 175         bdaddr_t        bdaddr;
 176         bdaddr_t        setup_addr;
 177         bdaddr_t        public_addr;
 178         bdaddr_t        random_addr;
 179         bdaddr_t        static_addr;
 180         __u8            adv_addr_type;
 181         __u8            dev_name[HCI_MAX_NAME_LENGTH];
 182         __u8            short_name[HCI_MAX_SHORT_NAME_LENGTH];
 183         __u8            eir[HCI_MAX_EIR_LENGTH];
 184         __u8            dev_class[3];
 185         __u8            major_class;
 186         __u8            minor_class;
 187         __u8            max_page;
 188         __u8            features[HCI_MAX_PAGES][8];
 189         __u8            le_features[8];
 190         __u8            le_white_list_size;
 191         __u8            le_states[8];
 192         __u8            commands[64];
 193         __u8            hci_ver;
 194         __u16           hci_rev;
 195         __u8            lmp_ver;
 196         __u16           manufacturer;
 197         __u16           lmp_subver;
 198         __u16           voice_setting;
 199         __u8            num_iac;
 200         __u8            io_capability;
 201         __s8            inq_tx_power;
 202         __u16           page_scan_interval;
 203         __u16           page_scan_window;
 204         __u8            page_scan_type;
 205         __u8            le_adv_channel_map;
 206         __u16           le_adv_min_interval;
 207         __u16           le_adv_max_interval;
 208         __u8            le_scan_type;
 209         __u16           le_scan_interval;
 210         __u16           le_scan_window;
 211         __u16           le_conn_min_interval;
 212         __u16           le_conn_max_interval;
 213         __u16           le_conn_latency;
 214         __u16           le_supv_timeout;
 215         __u16           discov_interleaved_timeout;
 216         __u16           conn_info_min_age;
 217         __u16           conn_info_max_age;
 218         __u8            ssp_debug_mode;
 219         __u32           clock;
 220
 221         __u16           devid_source;
 222         __u16           devid_vendor;
 223         __u16           devid_product;
 224         __u16           devid_version;
 225
 226         __u16           pkt_type;
 227         __u16           esco_type;
 228         __u16           link_policy;
 229         __u16           link_mode;
 230
 231         __u32           idle_timeout;
 232         __u16           sniff_min_interval;
 233         __u16           sniff_max_interval;
 234
 235         __u8            amp_status;
 236         __u32           amp_total_bw;
 237         __u32           amp_max_bw;
 238         __u32           amp_min_latency;
 239         __u32           amp_max_pdu;
 240         __u8            amp_type;
 241         __u16           amp_pal_cap;
 242         __u16           amp_assoc_size;
 243         __u32           amp_max_flush_to;
 244         __u32           amp_be_flush_to;
 245
 246         struct amp_assoc        loc_assoc;
 247
 248         __u8            flow_ctl_mode;
 249
 250         unsigned int    auto_accept_delay;
 251
 252         unsigned long   quirks;
 253
 254         atomic_t        cmd_cnt;
 255         unsigned int    acl_cnt;
 256         unsigned int    sco_cnt;
 257         unsigned int    le_cnt;
 258
 259         unsigned int    acl_mtu;
 260         unsigned int    sco_mtu;
 261         unsigned int    le_mtu;
 262         unsigned int    acl_pkts;
 263         unsigned int    sco_pkts;
 264         unsigned int    le_pkts;
 265
 266         __u16           block_len;
 267         __u16           block_mtu;
 268         __u16           num_blocks;
 269         __u16           block_cnt;
 270
 271         unsigned long   acl_last_tx;
 272         unsigned long   sco_last_tx;
 273         unsigned long   le_last_tx;
 274
 275         struct workqueue_struct *workqueue;
 276         struct workqueue_struct *req_workqueue;
 277
 278         struct work_struct      power_on;
 279         struct delayed_work     power_off;
 280
 281         __u16                   discov_timeout;
 282         struct delayed_work     discov_off;
 283
 284         struct delayed_work     service_cache;
 285
 286         struct delayed_work     cmd_timer;
 287
 288         struct work_struct      rx_work;
 289         struct work_struct      cmd_work;
 290         struct work_struct      tx_work;
 291
 292         struct sk_buff_head     rx_q;
 293         struct sk_buff_head     raw_q;
 294         struct sk_buff_head     cmd_q;
 295
 296         struct sk_buff          *recv_evt;
 297         struct sk_buff          *sent_cmd;
 298         struct sk_buff          *reassembly[NUM_REASSEMBLY];
 299
 300         struct mutex            req_lock;
 301         wait_queue_head_t       req_wait_q;
 302         __u32                   req_status;
 303         __u32                   req_result;
 304
 305         struct crypto_blkcipher *tfm_aes;
 306
 307         struct discovery_state  discovery;
 308         struct hci_conn_hash    conn_hash;
 309
 310         struct list_head        mgmt_pending;
 311         struct list_head        blacklist;
 312         struct list_head        whitelist;
 313         struct list_head        uuids;
 314         struct list_head        link_keys;
 315         struct list_head        long_term_keys;
 316         struct list_head        identity_resolving_keys;
 317         struct list_head        remote_oob_data;
 318         struct list_head        le_white_list;
 319         struct list_head        le_conn_params;
 320         struct list_head        pend_le_conns;
 321         struct list_head        pend_le_reports;
 322
 323         struct hci_dev_stats    stat;
 324
 325         atomic_t                promisc;
 326
 327         struct dentry           *debugfs;
 328
 329         struct device           dev;
 330
 331         struct rfkill           *rfkill;
 332
 333         unsigned long           dbg_flags;
 334         unsigned long           dev_flags;
 335
 336         struct delayed_work     le_scan_disable;
 337
 338         __s8                    adv_tx_power;
 339         __u8                    adv_data[HCI_MAX_AD_LENGTH];
 340         __u8                    adv_data_len;
 341         __u8                    scan_rsp_data[HCI_MAX_AD_LENGTH];
 342         __u8                    scan_rsp_data_len;
 343
 344         __u8                    irk[16];
 345         __u32                   rpa_timeout;
 346         struct delayed_work     rpa_expired;
 347         bdaddr_t                rpa;
 348
 349         int (*open)(struct hci_dev *hdev);
 350         int (*close)(struct hci_dev *hdev);
 351         int (*flush)(struct hci_dev *hdev);
 352         int (*setup)(struct hci_dev *hdev);
 353         int (*send)(struct hci_dev *hdev, struct sk_buff *skb);
 354         void (*notify)(struct hci_dev *hdev, unsigned int evt);
 355         int (*set_bdaddr)(struct hci_dev *hdev, const bdaddr_t *bdaddr);
 356 };
 357
 358 #define HCI_PHY_HANDLE(handle)  (handle & 0xff)
 359
 360 struct hci_conn {
 361         struct list_head list;
 362
 363         atomic_t        refcnt;
 364
 365         bdaddr_t        dst;
 366         __u8            dst_type;
 367         bdaddr_t        src;
 368         __u8            src_type;
 369         bdaddr_t        init_addr;
 370         __u8            init_addr_type;
 371         bdaddr_t        resp_addr;
 372         __u8            resp_addr_type;
 373         __u16           handle;
 374         __u16           state;
 375         __u8            mode;
 376         __u8            type;
 377         __u8            role;
 378         bool            out;
 379         __u8            attempt;
 380         __u8            dev_class[3];
 381         __u8            features[HCI_MAX_PAGES][8];
 382         __u16           pkt_type;
 383         __u16           link_policy;
 384         __u8            key_type;
 385         __u8            auth_type;
 386         __u8            sec_level;
 387         __u8            pending_sec_level;
 388         __u8            pin_length;
 389         __u8            enc_key_size;
 390         __u8            io_capability;
 391         __u32           passkey_notify;
 392         __u8            passkey_entered;
 393         __u16           disc_timeout;
 394         __u16           conn_timeout;
 395         __u16           setting;
 396         __u16           le_conn_min_interval;
 397         __u16           le_conn_max_interval;
 398         __u16           le_conn_interval;
 399         __u16           le_conn_latency;
 400         __u16           le_supv_timeout;
 401         __s8            rssi;
 402         __s8            tx_power;
 403         __s8            max_tx_power;
 404         unsigned long   flags;
 405
 406         __u32           clock;
 407         __u16           clock_accuracy;
 408
 409         unsigned long   conn_info_timestamp;
 410
 411         __u8            remote_cap;
 412         __u8            remote_auth;
 413         __u8            remote_id;
 414
 415         unsigned int    sent;
 416
 417         struct sk_buff_head data_q;
 418         struct list_head chan_list;
 419
 420         struct delayed_work disc_work;
 421         struct delayed_work auto_accept_work;
 422         struct delayed_work idle_work;
 423         struct delayed_work le_conn_timeout;
 424
 425         struct device   dev;
 426
 427         struct hci_dev  *hdev;
 428         void            *l2cap_data;
 429         void            *sco_data;
 430         struct amp_mgr  *amp_mgr;
 431
 432         struct hci_conn *link;
 433
 434         void (*connect_cfm_cb)  (struct hci_conn *conn, u8 status);
 435         void (*security_cfm_cb) (struct hci_conn *conn, u8 status);
 436         void (*disconn_cfm_cb)  (struct hci_conn *conn, u8 reason);
 437 };
 438
 439 struct hci_chan {
 440         struct list_head list;
 441         __u16 handle;
 442         struct hci_conn *conn;
 443         struct sk_buff_head data_q;
 444         unsigned int    sent;
 445         __u8            state;
 446 };
 447
 448 struct hci_conn_params {
 449         struct list_head list;
 450         struct list_head action;
 451
 452         bdaddr_t addr;
 453         u8 addr_type;
 454
 455         u16 conn_min_interval;
 456         u16 conn_max_interval;
 457         u16 conn_latency;
 458         u16 supervision_timeout;
 459
 460         enum {
 461                 HCI_AUTO_CONN_DISABLED,
 462                 HCI_AUTO_CONN_REPORT,
 463                 HCI_AUTO_CONN_DIRECT,
 464                 HCI_AUTO_CONN_ALWAYS,
 465                 HCI_AUTO_CONN_LINK_LOSS,
 466         } auto_connect;
 467 };
 468
 469 extern struct list_head hci_dev_list;
 470 extern struct list_head hci_cb_list;
 471 extern rwlock_t hci_dev_list_lock;
 472 extern rwlock_t hci_cb_list_lock;
 473
 474 /* ----- HCI interface to upper protocols ----- */
 475 int l2cap_connect_ind(struct hci_dev *hdev, bdaddr_t *bdaddr);
 476 void l2cap_connect_cfm(struct hci_conn *hcon, u8 status);
 477 int l2cap_disconn_ind(struct hci_conn *hcon);
 478 void l2cap_disconn_cfm(struct hci_conn *hcon, u8 reason);
 479 int l2cap_security_cfm(struct hci_conn *hcon, u8 status, u8 encrypt);
 480 int l2cap_recv_acldata(struct hci_conn *hcon, struct sk_buff *skb, u16 flags);
 481
 482 int sco_connect_ind(struct hci_dev *hdev, bdaddr_t *bdaddr, __u8 *flags);
 483 void sco_connect_cfm(struct hci_conn *hcon, __u8 status);
 484 void sco_disconn_cfm(struct hci_conn *hcon, __u8 reason);
 485 int sco_recv_scodata(struct hci_conn *hcon, struct sk_buff *skb);
 486
 487 /* ----- Inquiry cache ----- */
 488 #define INQUIRY_CACHE_AGE_MAX   (HZ*30)   /* 30 seconds */
 489 #define INQUIRY_ENTRY_AGE_MAX   (HZ*60)   /* 60 seconds */
 490
 491 static inline void discovery_init(struct hci_dev *hdev)
 492 {
 493         hdev->discovery.state = DISCOVERY_STOPPED;
 494         INIT_LIST_HEAD(&hdev->discovery.all);
 495         INIT_LIST_HEAD(&hdev->discovery.unknown);
 496         INIT_LIST_HEAD(&hdev->discovery.resolve);
 497 }
 498
 499 bool hci_discovery_active(struct hci_dev *hdev);
 500
 501 void hci_discovery_set_state(struct hci_dev *hdev, int state);
 502
 503 static inline int inquiry_cache_empty(struct hci_dev *hdev)
 504 {
 505         return list_empty(&hdev->discovery.all);
 506 }
 507
 508 static inline long inquiry_cache_age(struct hci_dev *hdev)
 509 {
 510         struct discovery_state *c = &hdev->discovery;
 511         return jiffies - c->timestamp;
 512 }
 513
 514 static inline long inquiry_entry_age(struct inquiry_entry *e)
 515 {
 516         return jiffies - e->timestamp;
 517 }
 518
 519 struct inquiry_entry *hci_inquiry_cache_lookup(struct hci_dev *hdev,
 520                                                bdaddr_t *bdaddr);
 521 struct inquiry_entry *hci_inquiry_cache_lookup_unknown(struct hci_dev *hdev,
 522                                                        bdaddr_t *bdaddr);
 523 struct inquiry_entry *hci_inquiry_cache_lookup_resolve(struct hci_dev *hdev,
 524                                                        bdaddr_t *bdaddr,
 525                                                        int state);
 526 void hci_inquiry_cache_update_resolve(struct hci_dev *hdev,
 527                                       struct inquiry_entry *ie);
 528 u32 hci_inquiry_cache_update(struct hci_dev *hdev, struct inquiry_data *data,
 529                              bool name_known);
 530 void hci_inquiry_cache_flush(struct hci_dev *hdev);
 531
 532 /* ----- HCI Connections ----- */
 533 enum {
 534         HCI_CONN_AUTH_PEND,
 535         HCI_CONN_REAUTH_PEND,
 536         HCI_CONN_ENCRYPT_PEND,
 537         HCI_CONN_RSWITCH_PEND,
 538         HCI_CONN_MODE_CHANGE_PEND,
 539         HCI_CONN_SCO_SETUP_PEND,
 540         HCI_CONN_LE_SMP_PEND,
 541         HCI_CONN_MGMT_CONNECTED,
 542         HCI_CONN_SSP_ENABLED,
 543         HCI_CONN_SC_ENABLED,
 544         HCI_CONN_AES_CCM,
 545         HCI_CONN_POWER_SAVE,
 546         HCI_CONN_REMOTE_OOB,
 547         HCI_CONN_FLUSH_KEY,
 548         HCI_CONN_ENCRYPT,
 549         HCI_CONN_AUTH,
 550         HCI_CONN_SECURE,
 551         HCI_CONN_FIPS,
 552         HCI_CONN_STK_ENCRYPT,
 553         HCI_CONN_AUTH_INITIATOR,
 554 };
 555
 556 static inline bool hci_conn_ssp_enabled(struct hci_conn *conn)
 557 {
 558         struct hci_dev *hdev = conn->hdev;
 559         return test_bit(HCI_SSP_ENABLED, &hdev->dev_flags) &&
 560                test_bit(HCI_CONN_SSP_ENABLED, &conn->flags);
 561 }
 562
 563 static inline bool hci_conn_sc_enabled(struct hci_conn *conn)
 564 {
 565         struct hci_dev *hdev = conn->hdev;
 566         return test_bit(HCI_SC_ENABLED, &hdev->dev_flags) &&
 567                test_bit(HCI_CONN_SC_ENABLED, &conn->flags);
 568 }
 569
 570 static inline void hci_conn_hash_add(struct hci_dev *hdev, struct hci_conn *c)
 571 {
 572         struct hci_conn_hash *h = &hdev->conn_hash;
 573         list_add_rcu(&c->list, &h->list);
 574         switch (c->type) {
 575         case ACL_LINK:
 576                 h->acl_num++;
 577                 break;
 578         case AMP_LINK:
 579                 h->amp_num++;
 580                 break;
 581         case LE_LINK:
 582                 h->le_num++;
 583                 if (c->role == HCI_ROLE_SLAVE)
 584                         h->le_num_slave++;
 585                 break;
 586         case SCO_LINK:
 587         case ESCO_LINK:
 588                 h->sco_num++;
 589                 break;
 590         }
 591 }
 592
 593 static inline void hci_conn_hash_del(struct hci_dev *hdev, struct hci_conn *c)
 594 {
 595         struct hci_conn_hash *h = &hdev->conn_hash;
 596
 597         list_del_rcu(&c->list);
 598         synchronize_rcu();
 599
 600         switch (c->type) {
 601         case ACL_LINK:
 602                 h->acl_num--;
 603                 break;
 604         case AMP_LINK:
 605                 h->amp_num--;
 606                 break;
 607         case LE_LINK:
 608                 h->le_num--;
 609                 if (c->role == HCI_ROLE_SLAVE)
 610                         h->le_num_slave--;
 611                 break;
 612         case SCO_LINK:
 613         case ESCO_LINK:
 614                 h->sco_num--;
 615                 break;
 616         }
 617 }
 618
 619 static inline unsigned int hci_conn_num(struct hci_dev *hdev, __u8 type)
 620 {
 621         struct hci_conn_hash *h = &hdev->conn_hash;
 622         switch (type) {
 623         case ACL_LINK:
 624                 return h->acl_num;
 625         case AMP_LINK:
 626                 return h->amp_num;
 627         case LE_LINK:
 628                 return h->le_num;
 629         case SCO_LINK:
 630         case ESCO_LINK:
 631                 return h->sco_num;
 632         default:
 633                 return 0;
 634         }
 635 }
 636
 637 static inline unsigned int hci_conn_count(struct hci_dev *hdev)
 638 {
 639         struct hci_conn_hash *c = &hdev->conn_hash;
 640
 641         return c->acl_num + c->amp_num + c->sco_num + c->le_num;
 642 }
 643
 644 static inline struct hci_conn *hci_conn_hash_lookup_handle(struct hci_dev *hdev,
 645                                                                 __u16 handle)
 646 {
 647         struct hci_conn_hash *h = &hdev->conn_hash;
 648         struct hci_conn  *c;
 649
 650         rcu_read_lock();
 651
 652         list_for_each_entry_rcu(c, &h->list, list) {
 653                 if (c->handle == handle) {
 654                         rcu_read_unlock();
 655                         return c;
 656                 }
 657         }
 658         rcu_read_unlock();
 659
 660         return NULL;
 661 }
 662
 663 static inline struct hci_conn *hci_conn_hash_lookup_ba(struct hci_dev *hdev,
 664                                                         __u8 type, bdaddr_t *ba)
 665 {
 666         struct hci_conn_hash *h = &hdev->conn_hash;
 667         struct hci_conn  *c;
 668
 669         rcu_read_lock();
 670
 671         list_for_each_entry_rcu(c, &h->list, list) {
 672                 if (c->type == type && !bacmp(&c->dst, ba)) {
 673                         rcu_read_unlock();
 674                         return c;
 675                 }
 676         }
 677
 678         rcu_read_unlock();
 679
 680         return NULL;
 681 }
 682
 683 static inline struct hci_conn *hci_conn_hash_lookup_state(struct hci_dev *hdev,
 684                                                         __u8 type, __u16 state)
 685 {
 686         struct hci_conn_hash *h = &hdev->conn_hash;
 687         struct hci_conn  *c;
 688
 689         rcu_read_lock();
 690
 691         list_for_each_entry_rcu(c, &h->list, list) {
 692                 if (c->type == type && c->state == state) {
 693                         rcu_read_unlock();
 694                         return c;
 695                 }
 696         }
 697
 698         rcu_read_unlock();
 699
 700         return NULL;
 701 }
 702
 703 void hci_disconnect(struct hci_conn *conn, __u8 reason);
 704 bool hci_setup_sync(struct hci_conn *conn, __u16 handle);
 705 void hci_sco_setup(struct hci_conn *conn, __u8 status);
 706
 707 struct hci_conn *hci_conn_add(struct hci_dev *hdev, int type, bdaddr_t *dst,
 708                               u8 role);
 709 int hci_conn_del(struct hci_conn *conn);
 710 void hci_conn_hash_flush(struct hci_dev *hdev);
 711 void hci_conn_check_pending(struct hci_dev *hdev);
 712
 713 struct hci_chan *hci_chan_create(struct hci_conn *conn);
 714 void hci_chan_del(struct hci_chan *chan);
 715 void hci_chan_list_flush(struct hci_conn *conn);
 716 struct hci_chan *hci_chan_lookup_handle(struct hci_dev *hdev, __u16 handle);
 717
 718 struct hci_conn *hci_connect_le(struct hci_dev *hdev, bdaddr_t *dst,
 719                                 u8 dst_type, u8 sec_level, u16 conn_timeout,
 720                                 u8 role);
 721 struct hci_conn *hci_connect_acl(struct hci_dev *hdev, bdaddr_t *dst,
 722                                  u8 sec_level, u8 auth_type);
 723 struct hci_conn *hci_connect_sco(struct hci_dev *hdev, int type, bdaddr_t *dst,
 724                                  __u16 setting);
 725 int hci_conn_check_link_mode(struct hci_conn *conn);
 726 int hci_conn_check_secure(struct hci_conn *conn, __u8 sec_level);
 727 int hci_conn_security(struct hci_conn *conn, __u8 sec_level, __u8 auth_type,
 728                       bool initiator);
 729 int hci_conn_change_link_key(struct hci_conn *conn);
 730 int hci_conn_switch_role(struct hci_conn *conn, __u8 role);
 731
 732 void hci_conn_enter_active_mode(struct hci_conn *conn, __u8 force_active);
 733
 734 void hci_le_conn_failed(struct hci_conn *conn, u8 status);
 735
 736 /*
 737  * hci_conn_get() and hci_conn_put() are used to control the life-time of an
 738  * "hci_conn" object. They do not guarantee that the hci_conn object is running,
 739  * working or anything else. They just guarantee that the object is available
 740  * and can be dereferenced. So you can use its locks, local variables and any
 741  * other constant data.
 742  * Before accessing runtime data, you _must_ lock the object and then check that
 743  * it is still running. As soon as you release the locks, the connection might
 744  * get dropped, though.
 745  *
 746  * On the other hand, hci_conn_hold() and hci_conn_drop() are used to control
 747  * how long the underlying connection is held. So every channel that runs on the
 748  * hci_conn object calls this to prevent the connection from disappearing. As
 749  * long as you hold a device, you must also guarantee that you have a valid
 750  * reference to the device via hci_conn_get() (or the initial reference from
 751  * hci_conn_add()).
 752  * The hold()/drop() ref-count is known to drop below 0 sometimes, which doesn't
 753  * break because nobody cares for that. But this means, we cannot use
 754  * _get()/_drop() in it, but require the caller to have a valid ref (FIXME).
 755  */
 756
 757 static inline void hci_conn_get(struct hci_conn *conn)
 758 {
 759         get_device(&conn->dev);
 760 }
 761
 762 static inline void hci_conn_put(struct hci_conn *conn)
 763 {
 764         put_device(&conn->dev);
 765 }
 766
 767 static inline void hci_conn_hold(struct hci_conn *conn)
 768 {
 769         BT_DBG("hcon %p orig refcnt %d", conn, atomic_read(&conn->refcnt));
 770
 771         atomic_inc(&conn->refcnt);
 772         cancel_delayed_work(&conn->disc_work);
 773 }
 774
 775 static inline void hci_conn_drop(struct hci_conn *conn)
 776 {
 777         BT_DBG("hcon %p orig refcnt %d", conn, atomic_read(&conn->refcnt));
 778
 779         if (atomic_dec_and_test(&conn->refcnt)) {
 780                 unsigned long timeo;
 781
 782                 switch (conn->type) {
 783                 case ACL_LINK:
 784                 case LE_LINK:
 785                         cancel_delayed_work(&conn->idle_work);
 786                         if (conn->state == BT_CONNECTED) {
 787                                 timeo = conn->disc_timeout;
 788                                 if (!conn->out)
 789                                         timeo *= 2;
 790                         } else {
 791                                 timeo = msecs_to_jiffies(10);
 792                         }
 793                         break;
 794
 795                 case AMP_LINK:
 796                         timeo = conn->disc_timeout;
 797                         break;
 798
 799                 default:
 800                         timeo = msecs_to_jiffies(10);
 801                         break;
 802                 }
 803
 804                 cancel_delayed_work(&conn->disc_work);
 805                 queue_delayed_work(conn->hdev->workqueue,
 806                                    &conn->disc_work, timeo);
 807         }
 808 }
 809
 810 /* ----- HCI Devices ----- */
 811 static inline void hci_dev_put(struct hci_dev *d)
 812 {
 813         BT_DBG("%s orig refcnt %d", d->name,
 814                atomic_read(&d->dev.kobj.kref.refcount));
 815
 816         put_device(&d->dev);
 817 }
 818
 819 static inline struct hci_dev *hci_dev_hold(struct hci_dev *d)
 820 {
 821         BT_DBG("%s orig refcnt %d", d->name,
 822                atomic_read(&d->dev.kobj.kref.refcount));
 823
 824         get_device(&d->dev);
 825         return d;
 826 }
 827
 828 #define hci_dev_lock(d)         mutex_lock(&d->lock)
 829 #define hci_dev_unlock(d)       mutex_unlock(&d->lock)
 830
 831 #define to_hci_dev(d) container_of(d, struct hci_dev, dev)
 832 #define to_hci_conn(c) container_of(c, struct hci_conn, dev)
 833
 834 static inline void *hci_get_drvdata(struct hci_dev *hdev)
 835 {
 836         return dev_get_drvdata(&hdev->dev);
 837 }
 838
 839 static inline void hci_set_drvdata(struct hci_dev *hdev, void *data)
 840 {
 841         dev_set_drvdata(&hdev->dev, data);
 842 }
 843
 844 struct hci_dev *hci_dev_get(int index);
 845 struct hci_dev *hci_get_route(bdaddr_t *dst, bdaddr_t *src);
 846
 847 struct hci_dev *hci_alloc_dev(void);
 848 void hci_free_dev(struct hci_dev *hdev);
 849 int hci_register_dev(struct hci_dev *hdev);
 850 void hci_unregister_dev(struct hci_dev *hdev);
 851 int hci_suspend_dev(struct hci_dev *hdev);
 852 int hci_resume_dev(struct hci_dev *hdev);
 853 int hci_dev_open(__u16 dev);
 854 int hci_dev_close(__u16 dev);
 855 int hci_dev_reset(__u16 dev);
 856 int hci_dev_reset_stat(__u16 dev);
 857 int hci_dev_cmd(unsigned int cmd, void __user *arg);
 858 int hci_get_dev_list(void __user *arg);
 859 int hci_get_dev_info(void __user *arg);
 860 int hci_get_conn_list(void __user *arg);
 861 int hci_get_conn_info(struct hci_dev *hdev, void __user *arg);
 862 int hci_get_auth_info(struct hci_dev *hdev, void __user *arg);
 863 int hci_inquiry(void __user *arg);
 864
 865 struct bdaddr_list *hci_bdaddr_list_lookup(struct list_head *list,
 866                                            bdaddr_t *bdaddr, u8 type);
 867 int hci_bdaddr_list_add(struct list_head *list, bdaddr_t *bdaddr, u8 type);
 868 int hci_bdaddr_list_del(struct list_head *list, bdaddr_t *bdaddr, u8 type);
 869 void hci_bdaddr_list_clear(struct list_head *list);
 870
 871 struct hci_conn_params *hci_conn_params_lookup(struct hci_dev *hdev,
 872                                                bdaddr_t *addr, u8 addr_type);
 873 struct hci_conn_params *hci_conn_params_add(struct hci_dev *hdev,
 874                                             bdaddr_t *addr, u8 addr_type);
 875 int hci_conn_params_set(struct hci_dev *hdev, bdaddr_t *addr, u8 addr_type,
 876                         u8 auto_connect);
 877 void hci_conn_params_del(struct hci_dev *hdev, bdaddr_t *addr, u8 addr_type);
 878 void hci_conn_params_clear_all(struct hci_dev *hdev);
 879 void hci_conn_params_clear_disabled(struct hci_dev *hdev);
 880
 881 struct hci_conn_params *hci_pend_le_action_lookup(struct list_head *list,
 882                                                   bdaddr_t *addr,
 883                                                   u8 addr_type);
 884
 885 void hci_update_background_scan(struct hci_dev *hdev);
 886
 887 void hci_uuids_clear(struct hci_dev *hdev);
 888
 889 void hci_link_keys_clear(struct hci_dev *hdev);
 890 struct link_key *hci_find_link_key(struct hci_dev *hdev, bdaddr_t *bdaddr);
 891 struct link_key *hci_add_link_key(struct hci_dev *hdev, struct hci_conn *conn,
 892                                   bdaddr_t *bdaddr, u8 *val, u8 type,
 893                                   u8 pin_len, bool *persistent);
 894 struct smp_ltk *hci_find_ltk(struct hci_dev *hdev, __le16 ediv, __le64 rand,
 895                              u8 role);
 896 struct smp_ltk *hci_add_ltk(struct hci_dev *hdev, bdaddr_t *bdaddr,
 897                             u8 addr_type, u8 type, u8 authenticated,
 898                             u8 tk[16], u8 enc_size, __le16 ediv, __le64 rand);
 899 struct smp_ltk *hci_find_ltk_by_addr(struct hci_dev *hdev, bdaddr_t *bdaddr,
 900                                      u8 addr_type, u8 role);
 901 int hci_remove_ltk(struct hci_dev *hdev, bdaddr_t *bdaddr, u8 bdaddr_type);
 902 void hci_smp_ltks_clear(struct hci_dev *hdev);
 903 int hci_remove_link_key(struct hci_dev *hdev, bdaddr_t *bdaddr);
 904
 905 struct smp_irk *hci_find_irk_by_rpa(struct hci_dev *hdev, bdaddr_t *rpa);
 906 struct smp_irk *hci_find_irk_by_addr(struct hci_dev *hdev, bdaddr_t *bdaddr,
 907                                      u8 addr_type);
 908 struct smp_irk *hci_add_irk(struct hci_dev *hdev, bdaddr_t *bdaddr,
 909                             u8 addr_type, u8 val[16], bdaddr_t *rpa);
 910 void hci_remove_irk(struct hci_dev *hdev, bdaddr_t *bdaddr, u8 addr_type);
 911 void hci_smp_irks_clear(struct hci_dev *hdev);
 912
 913 void hci_remote_oob_data_clear(struct hci_dev *hdev);
 914 struct oob_data *hci_find_remote_oob_data(struct hci_dev *hdev,
 915                                           bdaddr_t *bdaddr);
 916 int hci_add_remote_oob_data(struct hci_dev *hdev, bdaddr_t *bdaddr,
 917                             u8 *hash, u8 *randomizer);
 918 int hci_add_remote_oob_ext_data(struct hci_dev *hdev, bdaddr_t *bdaddr,
 919                                 u8 *hash192, u8 *randomizer192,
 920                                 u8 *hash256, u8 *randomizer256);
 921 int hci_remove_remote_oob_data(struct hci_dev *hdev, bdaddr_t *bdaddr);
 922
 923 void hci_event_packet(struct hci_dev *hdev, struct sk_buff *skb);
 924
 925 int hci_recv_frame(struct hci_dev *hdev, struct sk_buff *skb);
 926 int hci_recv_fragment(struct hci_dev *hdev, int type, void *data, int count);
 927 int hci_recv_stream_fragment(struct hci_dev *hdev, void *data, int count);
 928
 929 void hci_init_sysfs(struct hci_dev *hdev);
 930 void hci_conn_init_sysfs(struct hci_conn *conn);
 931 void hci_conn_add_sysfs(struct hci_conn *conn);
 932 void hci_conn_del_sysfs(struct hci_conn *conn);
 933
 934 #define SET_HCIDEV_DEV(hdev, pdev) ((hdev)->dev.parent = (pdev))
 935
 936 /* ----- LMP capabilities ----- */
 937 #define lmp_encrypt_capable(dev)   ((dev)->features[0][0] & LMP_ENCRYPT)
 938 #define lmp_rswitch_capable(dev)   ((dev)->features[0][0] & LMP_RSWITCH)
 939 #define lmp_hold_capable(dev)      ((dev)->features[0][0] & LMP_HOLD)
 940 #define lmp_sniff_capable(dev)     ((dev)->features[0][0] & LMP_SNIFF)
 941 #define lmp_park_capable(dev)      ((dev)->features[0][1] & LMP_PARK)
 942 #define lmp_inq_rssi_capable(dev)  ((dev)->features[0][3] & LMP_RSSI_INQ)
 943 #define lmp_esco_capable(dev)      ((dev)->features[0][3] & LMP_ESCO)
 944 #define lmp_bredr_capable(dev)     (!((dev)->features[0][4] & LMP_NO_BREDR))
 945 #define lmp_le_capable(dev)        ((dev)->features[0][4] & LMP_LE)
 946 #define lmp_sniffsubr_capable(dev) ((dev)->features[0][5] & LMP_SNIFF_SUBR)
 947 #define lmp_pause_enc_capable(dev) ((dev)->features[0][5] & LMP_PAUSE_ENC)
 948 #define lmp_ext_inq_capable(dev)   ((dev)->features[0][6] & LMP_EXT_INQ)
 949 #define lmp_le_br_capable(dev)     (!!((dev)->features[0][6] & LMP_SIMUL_LE_BR))
 950 #define lmp_ssp_capable(dev)       ((dev)->features[0][6] & LMP_SIMPLE_PAIR)
 951 #define lmp_no_flush_capable(dev)  ((dev)->features[0][6] & LMP_NO_FLUSH)
 952 #define lmp_lsto_capable(dev)      ((dev)->features[0][7] & LMP_LSTO)
 953 #define lmp_inq_tx_pwr_capable(dev) ((dev)->features[0][7] & LMP_INQ_TX_PWR)
 954 #define lmp_ext_feat_capable(dev)  ((dev)->features[0][7] & LMP_EXTFEATURES)
 955 #define lmp_transp_capable(dev)    ((dev)->features[0][2] & LMP_TRANSPARENT)
 956
 957 /* ----- Extended LMP capabilities ----- */
 958 #define lmp_csb_master_capable(dev) ((dev)->features[2][0] & LMP_CSB_MASTER)
 959 #define lmp_csb_slave_capable(dev)  ((dev)->features[2][0] & LMP_CSB_SLAVE)
 960 #define lmp_sync_train_capable(dev) ((dev)->features[2][0] & LMP_SYNC_TRAIN)
 961 #define lmp_sync_scan_capable(dev)  ((dev)->features[2][0] & LMP_SYNC_SCAN)
 962 #define lmp_sc_capable(dev)         ((dev)->features[2][1] & LMP_SC)
 963 #define lmp_ping_capable(dev)       ((dev)->features[2][1] & LMP_PING)
 964
 965 /* ----- Host capabilities ----- */
 966 #define lmp_host_ssp_capable(dev)  ((dev)->features[1][0] & LMP_HOST_SSP)
 967 #define lmp_host_sc_capable(dev)   ((dev)->features[1][0] & LMP_HOST_SC)
 968 #define lmp_host_le_capable(dev)   (!!((dev)->features[1][0] & LMP_HOST_LE))
 969 #define lmp_host_le_br_capable(dev) (!!((dev)->features[1][0] & LMP_HOST_LE_BREDR))
 970
 971 /* ----- HCI protocols ----- */
 972 #define HCI_PROTO_DEFER             0x01
 973
 974 static inline int hci_proto_connect_ind(struct hci_dev *hdev, bdaddr_t *bdaddr,
 975                                         __u8 type, __u8 *flags)
 976 {
 977         switch (type) {
 978         case ACL_LINK:
 979                 return l2cap_connect_ind(hdev, bdaddr);
 980
 981         case SCO_LINK:
 982         case ESCO_LINK:
 983                 return sco_connect_ind(hdev, bdaddr, flags);
 984
 985         default:
 986                 BT_ERR("unknown link type %d", type);
 987                 return -EINVAL;
 988         }
 989 }
 990
 991 static inline void hci_proto_connect_cfm(struct hci_conn *conn, __u8 status)
 992 {
 993         switch (conn->type) {
 994         case ACL_LINK:
 995         case LE_LINK:
 996                 l2cap_connect_cfm(conn, status);
 997                 break;
 998
 999         case SCO_LINK:
1000         case ESCO_LINK:
1001                 sco_connect_cfm(conn, status);
1002                 break;
1003
1004         default:
1005                 BT_ERR("unknown link type %d", conn->type);
1006                 break;
1007         }
1008
1009         if (conn->connect_cfm_cb)
1010                 conn->connect_cfm_cb(conn, status);
1011 }
1012
1013 static inline int hci_proto_disconn_ind(struct hci_conn *conn)
1014 {
1015         if (conn->type != ACL_LINK && conn->type != LE_LINK)
1016                 return HCI_ERROR_REMOTE_USER_TERM;
1017
1018         return l2cap_disconn_ind(conn);
1019 }
1020
1021 static inline void hci_proto_disconn_cfm(struct hci_conn *conn, __u8 reason)
1022 {
1023         switch (conn->type) {
1024         case ACL_LINK:
1025         case LE_LINK:
1026                 l2cap_disconn_cfm(conn, reason);
1027                 break;
1028
1029         case SCO_LINK:
1030         case ESCO_LINK:
1031                 sco_disconn_cfm(conn, reason);
1032                 break;
1033
1034         /* L2CAP would be handled for BREDR chan */
1035         case AMP_LINK:
1036                 break;
1037
1038         default:
1039                 BT_ERR("unknown link type %d", conn->type);
1040                 break;
1041         }
1042
1043         if (conn->disconn_cfm_cb)
1044                 conn->disconn_cfm_cb(conn, reason);
1045 }
1046
1047 static inline void hci_proto_auth_cfm(struct hci_conn *conn, __u8 status)
1048 {
1049         __u8 encrypt;
1050
1051         if (conn->type != ACL_LINK && conn->type != LE_LINK)
1052                 return;
1053
1054         if (test_bit(HCI_CONN_ENCRYPT_PEND, &conn->flags))
1055                 return;
1056
1057         encrypt = test_bit(HCI_CONN_ENCRYPT, &conn->flags) ? 0x01 : 0x00;
1058         l2cap_security_cfm(conn, status, encrypt);
1059
1060         if (conn->security_cfm_cb)
1061                 conn->security_cfm_cb(conn, status);
1062 }
1063
1064 static inline void hci_proto_encrypt_cfm(struct hci_conn *conn, __u8 status,
1065                                                                 __u8 encrypt)
1066 {
1067         if (conn->type != ACL_LINK && conn->type != LE_LINK)
1068                 return;
1069
1070         l2cap_security_cfm(conn, status, encrypt);
1071
1072         if (conn->security_cfm_cb)
1073                 conn->security_cfm_cb(conn, status);
1074 }
1075
1076 /* ----- HCI callbacks ----- */
1077 struct hci_cb {
1078         struct list_head list;
1079
1080         char *name;
1081
1082         void (*security_cfm)    (struct hci_conn *conn, __u8 status,
1083                                                                 __u8 encrypt);
1084         void (*key_change_cfm)  (struct hci_conn *conn, __u8 status);
1085         void (*role_switch_cfm) (struct hci_conn *conn, __u8 status, __u8 role);
1086 };
1087
1088 static inline void hci_auth_cfm(struct hci_conn *conn, __u8 status)
1089 {
1090         struct hci_cb *cb;
1091         __u8 encrypt;
1092
1093         hci_proto_auth_cfm(conn, status);
1094
1095         if (test_bit(HCI_CONN_ENCRYPT_PEND, &conn->flags))
1096                 return;
1097
1098         encrypt = test_bit(HCI_CONN_ENCRYPT, &conn->flags) ? 0x01 : 0x00;
1099
1100         read_lock(&hci_cb_list_lock);
1101         list_for_each_entry(cb, &hci_cb_list, list) {
1102                 if (cb->security_cfm)
1103                         cb->security_cfm(conn, status, encrypt);
1104         }
1105         read_unlock(&hci_cb_list_lock);
1106 }
1107
1108 static inline void hci_encrypt_cfm(struct hci_conn *conn, __u8 status,
1109                                                                 __u8 encrypt)
1110 {
1111         struct hci_cb *cb;
1112
1113         if (conn->sec_level == BT_SECURITY_SDP)
1114                 conn->sec_level = BT_SECURITY_LOW;
1115
1116         if (conn->pending_sec_level > conn->sec_level)
1117                 conn->sec_level = conn->pending_sec_level;
1118
1119         hci_proto_encrypt_cfm(conn, status, encrypt);
1120
1121         read_lock(&hci_cb_list_lock);
1122         list_for_each_entry(cb, &hci_cb_list, list) {
1123                 if (cb->security_cfm)
1124                         cb->security_cfm(conn, status, encrypt);
1125         }
1126         read_unlock(&hci_cb_list_lock);
1127 }
1128
1129 static inline void hci_key_change_cfm(struct hci_conn *conn, __u8 status)
1130 {
1131         struct hci_cb *cb;
1132
1133         read_lock(&hci_cb_list_lock);
1134         list_for_each_entry(cb, &hci_cb_list, list) {
1135                 if (cb->key_change_cfm)
1136                         cb->key_change_cfm(conn, status);
1137         }
1138         read_unlock(&hci_cb_list_lock);
1139 }
1140
1141 static inline void hci_role_switch_cfm(struct hci_conn *conn, __u8 status,
1142                                                                 __u8 role)
1143 {
1144         struct hci_cb *cb;
1145
1146         read_lock(&hci_cb_list_lock);
1147         list_for_each_entry(cb, &hci_cb_list, list) {
1148                 if (cb->role_switch_cfm)
1149                         cb->role_switch_cfm(conn, status, role);
1150         }
1151         read_unlock(&hci_cb_list_lock);
1152 }
1153
1154 static inline bool eir_has_data_type(u8 *data, size_t data_len, u8 type)
1155 {
1156         size_t parsed = 0;
1157
1158         if (data_len < 2)
1159                 return false;
1160
1161         while (parsed < data_len - 1) {
1162                 u8 field_len = data[0];
1163
1164                 if (field_len == 0)
1165                         break;
1166
1167                 parsed += field_len + 1;
1168
1169                 if (parsed > data_len)
1170                         break;
1171
1172                 if (data[1] == type)
1173                         return true;
1174
1175                 data += field_len + 1;
1176         }
1177
1178         return false;
1179 }
1180
1181 static inline bool hci_bdaddr_is_rpa(bdaddr_t *bdaddr, u8 addr_type)
1182 {
1183         if (addr_type != ADDR_LE_DEV_RANDOM)
1184                 return false;
1185
1186         if ((bdaddr->b[5] & 0xc0) == 0x40)
1187                return true;
1188
1189         return false;
1190 }
1191
1192 static inline bool hci_is_identity_address(bdaddr_t *addr, u8 addr_type)
1193 {
1194         if (addr_type == ADDR_LE_DEV_PUBLIC)
1195                 return true;
1196
1197         /* Check for Random Static address type */
1198         if ((addr->b[5] & 0xc0) == 0xc0)
1199                 return true;
1200
1201         return false;
1202 }
1203
1204 static inline struct smp_irk *hci_get_irk(struct hci_dev *hdev,
1205                                           bdaddr_t *bdaddr, u8 addr_type)
1206 {
1207         if (!hci_bdaddr_is_rpa(bdaddr, addr_type))
1208                 return NULL;
1209
1210         return hci_find_irk_by_rpa(hdev, bdaddr);
1211 }
1212
1213 static inline int hci_check_conn_params(u16 min, u16 max, u16 latency,
1214                                         u16 to_multiplier)
1215 {
1216         u16 max_latency;
1217
1218         if (min > max || min < 6 || max > 3200)
1219                 return -EINVAL;
1220
1221         if (to_multiplier < 10 || to_multiplier > 3200)
1222                 return -EINVAL;
1223
1224         if (max >= to_multiplier * 8)
1225                 return -EINVAL;
1226
1227         max_latency = (to_multiplier * 8 / max) - 1;
1228         if (latency > 499 || latency > max_latency)
1229                 return -EINVAL;
1230
1231         return 0;
1232 }
1233
1234 int hci_register_cb(struct hci_cb *hcb);
1235 int hci_unregister_cb(struct hci_cb *hcb);
1236
1237 struct hci_request {
1238         struct hci_dev          *hdev;
1239         struct sk_buff_head     cmd_q;
1240
1241         /* If something goes wrong when building the HCI request, the error
1242          * value is stored in this field.
1243          */
1244         int                     err;
1245 };
1246
1247 void hci_req_init(struct hci_request *req, struct hci_dev *hdev);
1248 int hci_req_run(struct hci_request *req, hci_req_complete_t complete);
1249 void hci_req_add(struct hci_request *req, u16 opcode, u32 plen,
1250                  const void *param);
1251 void hci_req_add_ev(struct hci_request *req, u16 opcode, u32 plen,
1252                     const void *param, u8 event);
1253 void hci_req_cmd_complete(struct hci_dev *hdev, u16 opcode, u8 status);
1254 bool hci_req_pending(struct hci_dev *hdev);
1255
1256 void hci_req_add_le_scan_disable(struct hci_request *req);
1257 void hci_req_add_le_passive_scan(struct hci_request *req);
1258
1259 struct sk_buff *__hci_cmd_sync(struct hci_dev *hdev, u16 opcode, u32 plen,
1260                                const void *param, u32 timeout);
1261 struct sk_buff *__hci_cmd_sync_ev(struct hci_dev *hdev, u16 opcode, u32 plen,
1262                                   const void *param, u8 event, u32 timeout);
1263
1264 int hci_send_cmd(struct hci_dev *hdev, __u16 opcode, __u32 plen,
1265                  const void *param);
1266 void hci_send_acl(struct hci_chan *chan, struct sk_buff *skb, __u16 flags);
1267 void hci_send_sco(struct hci_conn *conn, struct sk_buff *skb);
1268
1269 void *hci_sent_cmd_data(struct hci_dev *hdev, __u16 opcode);
1270
1271 /* ----- HCI Sockets ----- */
1272 void hci_send_to_sock(struct hci_dev *hdev, struct sk_buff *skb);
1273 void hci_send_to_control(struct sk_buff *skb, struct sock *skip_sk);
1274 void hci_send_to_monitor(struct hci_dev *hdev, struct sk_buff *skb);
1275
1276 void hci_sock_dev_event(struct hci_dev *hdev, int event);
1277
1278 /* Management interface */
1279 #define DISCOV_TYPE_BREDR               (BIT(BDADDR_BREDR))
1280 #define DISCOV_TYPE_LE                  (BIT(BDADDR_LE_PUBLIC) | \
1281                                          BIT(BDADDR_LE_RANDOM))
1282 #define DISCOV_TYPE_INTERLEAVED         (BIT(BDADDR_BREDR) | \
1283                                          BIT(BDADDR_LE_PUBLIC) | \
1284                                          BIT(BDADDR_LE_RANDOM))
1285
1286 /* These LE scan and inquiry parameters were chosen according to LE General
1287  * Discovery Procedure specification.
1288  */
1289 #define DISCOV_LE_SCAN_WIN              0x12
1290 #define DISCOV_LE_SCAN_INT              0x12
1291 #define DISCOV_LE_TIMEOUT               10240   /* msec */
1292 #define DISCOV_INTERLEAVED_TIMEOUT      5120    /* msec */
1293 #define DISCOV_INTERLEAVED_INQUIRY_LEN  0x04
1294 #define DISCOV_BREDR_INQUIRY_LEN        0x08
1295
1296 int mgmt_control(struct sock *sk, struct msghdr *msg, size_t len);
1297 int mgmt_new_settings(struct hci_dev *hdev);
1298 void mgmt_index_added(struct hci_dev *hdev);
1299 void mgmt_index_removed(struct hci_dev *hdev);
1300 void mgmt_set_powered_failed(struct hci_dev *hdev, int err);
1301 int mgmt_powered(struct hci_dev *hdev, u8 powered);
1302 int mgmt_update_adv_data(struct hci_dev *hdev);
1303 void mgmt_discoverable_timeout(struct hci_dev *hdev);
1304 void mgmt_new_link_key(struct hci_dev *hdev, struct link_key *key,
1305                        bool persistent);
1306 void mgmt_device_connected(struct hci_dev *hdev, bdaddr_t *bdaddr, u8 link_type,
1307                            u8 addr_type, u32 flags, u8 *name, u8 name_len,
1308                            u8 *dev_class);
1309 void mgmt_device_disconnected(struct hci_dev *hdev, bdaddr_t *bdaddr,
1310                               u8 link_type, u8 addr_type, u8 reason,
1311                               bool mgmt_connected);
1312 void mgmt_disconnect_failed(struct hci_dev *hdev, bdaddr_t *bdaddr,
1313                             u8 link_type, u8 addr_type, u8 status);
1314 void mgmt_connect_failed(struct hci_dev *hdev, bdaddr_t *bdaddr, u8 link_type,
1315                          u8 addr_type, u8 status);
1316 void mgmt_pin_code_request(struct hci_dev *hdev, bdaddr_t *bdaddr, u8 secure);
1317 void mgmt_pin_code_reply_complete(struct hci_dev *hdev, bdaddr_t *bdaddr,
1318                                   u8 status);
1319 void mgmt_pin_code_neg_reply_complete(struct hci_dev *hdev, bdaddr_t *bdaddr,
1320                                       u8 status);
1321 int mgmt_user_confirm_request(struct hci_dev *hdev, bdaddr_t *bdaddr,
1322                               u8 link_type, u8 addr_type, u32 value,
1323                               u8 confirm_hint);
1324 int mgmt_user_confirm_reply_complete(struct hci_dev *hdev, bdaddr_t *bdaddr,
1325                                      u8 link_type, u8 addr_type, u8 status);
1326 int mgmt_user_confirm_neg_reply_complete(struct hci_dev *hdev, bdaddr_t *bdaddr,
1327                                          u8 link_type, u8 addr_type, u8 status);
1328 int mgmt_user_passkey_request(struct hci_dev *hdev, bdaddr_t *bdaddr,
1329                               u8 link_type, u8 addr_type);
1330 int mgmt_user_passkey_reply_complete(struct hci_dev *hdev, bdaddr_t *bdaddr,
1331                                      u8 link_type, u8 addr_type, u8 status);
1332 int mgmt_user_passkey_neg_reply_complete(struct hci_dev *hdev, bdaddr_t *bdaddr,
1333                                          u8 link_type, u8 addr_type, u8 status);
1334 int mgmt_user_passkey_notify(struct hci_dev *hdev, bdaddr_t *bdaddr,
1335                              u8 link_type, u8 addr_type, u32 passkey,
1336                              u8 entered);
1337 void mgmt_auth_failed(struct hci_dev *hdev, bdaddr_t *bdaddr, u8 link_type,
1338                       u8 addr_type, u8 status);
1339 void mgmt_auth_enable_complete(struct hci_dev *hdev, u8 status);
1340 void mgmt_ssp_enable_complete(struct hci_dev *hdev, u8 enable, u8 status);
1341 void mgmt_sc_enable_complete(struct hci_dev *hdev, u8 enable, u8 status);
1342 void mgmt_set_class_of_dev_complete(struct hci_dev *hdev, u8 *dev_class,
1343                                     u8 status);
1344 void mgmt_set_local_name_complete(struct hci_dev *hdev, u8 *name, u8 status);
1345 void mgmt_read_local_oob_data_complete(struct hci_dev *hdev, u8 *hash192,
1346                                        u8 *randomizer192, u8 *hash256,
1347                                        u8 *randomizer256, u8 status);
1348 void mgmt_device_found(struct hci_dev *hdev, bdaddr_t *bdaddr, u8 link_type,
1349                        u8 addr_type, u8 *dev_class, s8 rssi, u32 flags,
1350                        u8 *eir, u16 eir_len, u8 *scan_rsp, u8 scan_rsp_len);
1351 void mgmt_remote_name(struct hci_dev *hdev, bdaddr_t *bdaddr, u8 link_type,
1352                       u8 addr_type, s8 rssi, u8 *name, u8 name_len);
1353 void mgmt_discovering(struct hci_dev *hdev, u8 discovering);
1354 void mgmt_new_ltk(struct hci_dev *hdev, struct smp_ltk *key, bool persistent);
1355 void mgmt_new_irk(struct hci_dev *hdev, struct smp_irk *irk);
1356 void mgmt_new_csrk(struct hci_dev *hdev, struct smp_csrk *csrk,
1357                    bool persistent);
1358 void mgmt_new_conn_param(struct hci_dev *hdev, bdaddr_t *bdaddr,
1359                          u8 bdaddr_type, u8 store_hint, u16 min_interval,
1360                          u16 max_interval, u16 latency, u16 timeout);
1361 void mgmt_reenable_advertising(struct hci_dev *hdev);
1362 void mgmt_smp_complete(struct hci_conn *conn, bool complete);
1363
1364 u8 hci_le_conn_update(struct hci_conn *conn, u16 min, u16 max, u16 latency,
1365                       u16 to_multiplier);
1366 void hci_le_start_enc(struct hci_conn *conn, __le16 ediv, __le64 rand,
1367                                                         __u8 ltk[16]);
1368
1369 int hci_update_random_address(struct hci_request *req, bool require_privacy,
1370                               u8 *own_addr_type);
1371 void hci_copy_identity_address(struct hci_dev *hdev, bdaddr_t *bdaddr,
1372                                u8 *bdaddr_type);
1373
1374 #define SCO_AIRMODE_MASK       0x0003
1375 #define SCO_AIRMODE_CVSD       0x0000
1376 #define SCO_AIRMODE_TRANSP     0x0003
1377
1378 #endif /* __HCI_CORE_H */