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