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0001 /*
0002    BlueZ - Bluetooth protocol stack for Linux
0003    Copyright (c) 2000-2001, 2010, Code Aurora Forum. All rights reserved.
0004 
0005    Written 2000,2001 by Maxim Krasnyansky <maxk@qualcomm.com>
0006 
0007    This program is free software; you can redistribute it and/or modify
0008    it under the terms of the GNU General Public License version 2 as
0009    published by the Free Software Foundation;
0010 
0011    THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
0012    OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
0013    FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT OF THIRD PARTY RIGHTS.
0014    IN NO EVENT SHALL THE COPYRIGHT HOLDER(S) AND AUTHOR(S) BE LIABLE FOR ANY
0015    CLAIM, OR ANY SPECIAL INDIRECT OR CONSEQUENTIAL DAMAGES, OR ANY DAMAGES
0016    WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
0017    ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
0018    OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
0019 
0020    ALL LIABILITY, INCLUDING LIABILITY FOR INFRINGEMENT OF ANY PATENTS,
0021    COPYRIGHTS, TRADEMARKS OR OTHER RIGHTS, RELATING TO USE OF THIS
0022    SOFTWARE IS DISCLAIMED.
0023 */
0024 
0025 #ifndef __HCI_CORE_H
0026 #define __HCI_CORE_H
0027 
0028 #include <linux/idr.h>
0029 #include <linux/leds.h>
0030 #include <linux/rculist.h>
0031 
0032 #include <net/bluetooth/hci.h>
0033 #include <net/bluetooth/hci_sync.h>
0034 #include <net/bluetooth/hci_sock.h>
0035 
0036 /* HCI priority */
0037 #define HCI_PRIO_MAX    7
0038 
0039 /* HCI maximum id value */
0040 #define HCI_MAX_ID 10000
0041 
0042 /* HCI Core structures */
0043 struct inquiry_data {
0044     bdaddr_t    bdaddr;
0045     __u8        pscan_rep_mode;
0046     __u8        pscan_period_mode;
0047     __u8        pscan_mode;
0048     __u8        dev_class[3];
0049     __le16      clock_offset;
0050     __s8        rssi;
0051     __u8        ssp_mode;
0052 };
0053 
0054 struct inquiry_entry {
0055     struct list_head    all;        /* inq_cache.all */
0056     struct list_head    list;       /* unknown or resolve */
0057     enum {
0058         NAME_NOT_KNOWN,
0059         NAME_NEEDED,
0060         NAME_PENDING,
0061         NAME_KNOWN,
0062     } name_state;
0063     __u32           timestamp;
0064     struct inquiry_data data;
0065 };
0066 
0067 struct discovery_state {
0068     int         type;
0069     enum {
0070         DISCOVERY_STOPPED,
0071         DISCOVERY_STARTING,
0072         DISCOVERY_FINDING,
0073         DISCOVERY_RESOLVING,
0074         DISCOVERY_STOPPING,
0075     } state;
0076     struct list_head    all;    /* All devices found during inquiry */
0077     struct list_head    unknown;    /* Name state not known */
0078     struct list_head    resolve;    /* Name needs to be resolved */
0079     __u32           timestamp;
0080     bdaddr_t        last_adv_addr;
0081     u8          last_adv_addr_type;
0082     s8          last_adv_rssi;
0083     u32         last_adv_flags;
0084     u8          last_adv_data[HCI_MAX_AD_LENGTH];
0085     u8          last_adv_data_len;
0086     bool            report_invalid_rssi;
0087     bool            result_filtering;
0088     bool            limited;
0089     s8          rssi;
0090     u16         uuid_count;
0091     u8          (*uuids)[16];
0092     unsigned long       scan_start;
0093     unsigned long       scan_duration;
0094     unsigned long       name_resolve_timeout;
0095 };
0096 
0097 #define SUSPEND_NOTIFIER_TIMEOUT    msecs_to_jiffies(2000) /* 2 seconds */
0098 
0099 enum suspend_tasks {
0100     SUSPEND_PAUSE_DISCOVERY,
0101     SUSPEND_UNPAUSE_DISCOVERY,
0102 
0103     SUSPEND_PAUSE_ADVERTISING,
0104     SUSPEND_UNPAUSE_ADVERTISING,
0105 
0106     SUSPEND_SCAN_DISABLE,
0107     SUSPEND_SCAN_ENABLE,
0108     SUSPEND_DISCONNECTING,
0109 
0110     SUSPEND_POWERING_DOWN,
0111 
0112     SUSPEND_PREPARE_NOTIFIER,
0113 
0114     SUSPEND_SET_ADV_FILTER,
0115     __SUSPEND_NUM_TASKS
0116 };
0117 
0118 enum suspended_state {
0119     BT_RUNNING = 0,
0120     BT_SUSPEND_DISCONNECT,
0121     BT_SUSPEND_CONFIGURE_WAKE,
0122 };
0123 
0124 struct hci_conn_hash {
0125     struct list_head list;
0126     unsigned int     acl_num;
0127     unsigned int     amp_num;
0128     unsigned int     sco_num;
0129     unsigned int     iso_num;
0130     unsigned int     le_num;
0131     unsigned int     le_num_peripheral;
0132 };
0133 
0134 struct bdaddr_list {
0135     struct list_head list;
0136     bdaddr_t bdaddr;
0137     u8 bdaddr_type;
0138 };
0139 
0140 struct codec_list {
0141     struct list_head list;
0142     u8  id;
0143     __u16   cid;
0144     __u16   vid;
0145     u8  transport;
0146     u8  num_caps;
0147     u32 len;
0148     struct hci_codec_caps caps[];
0149 };
0150 
0151 struct bdaddr_list_with_irk {
0152     struct list_head list;
0153     bdaddr_t bdaddr;
0154     u8 bdaddr_type;
0155     u8 peer_irk[16];
0156     u8 local_irk[16];
0157 };
0158 
0159 /* Bitmask of connection flags */
0160 enum hci_conn_flags {
0161     HCI_CONN_FLAG_REMOTE_WAKEUP = 1,
0162     HCI_CONN_FLAG_DEVICE_PRIVACY = 2,
0163 };
0164 typedef u8 hci_conn_flags_t;
0165 
0166 struct bdaddr_list_with_flags {
0167     struct list_head list;
0168     bdaddr_t bdaddr;
0169     u8 bdaddr_type;
0170     hci_conn_flags_t flags;
0171 };
0172 
0173 struct bt_uuid {
0174     struct list_head list;
0175     u8 uuid[16];
0176     u8 size;
0177     u8 svc_hint;
0178 };
0179 
0180 struct blocked_key {
0181     struct list_head list;
0182     struct rcu_head rcu;
0183     u8 type;
0184     u8 val[16];
0185 };
0186 
0187 struct smp_csrk {
0188     bdaddr_t bdaddr;
0189     u8 bdaddr_type;
0190     u8 type;
0191     u8 val[16];
0192 };
0193 
0194 struct smp_ltk {
0195     struct list_head list;
0196     struct rcu_head rcu;
0197     bdaddr_t bdaddr;
0198     u8 bdaddr_type;
0199     u8 authenticated;
0200     u8 type;
0201     u8 enc_size;
0202     __le16 ediv;
0203     __le64 rand;
0204     u8 val[16];
0205 };
0206 
0207 struct smp_irk {
0208     struct list_head list;
0209     struct rcu_head rcu;
0210     bdaddr_t rpa;
0211     bdaddr_t bdaddr;
0212     u8 addr_type;
0213     u8 val[16];
0214 };
0215 
0216 struct link_key {
0217     struct list_head list;
0218     struct rcu_head rcu;
0219     bdaddr_t bdaddr;
0220     u8 type;
0221     u8 val[HCI_LINK_KEY_SIZE];
0222     u8 pin_len;
0223 };
0224 
0225 struct oob_data {
0226     struct list_head list;
0227     bdaddr_t bdaddr;
0228     u8 bdaddr_type;
0229     u8 present;
0230     u8 hash192[16];
0231     u8 rand192[16];
0232     u8 hash256[16];
0233     u8 rand256[16];
0234 };
0235 
0236 struct adv_info {
0237     struct list_head list;
0238     bool    enabled;
0239     bool    pending;
0240     bool    periodic;
0241     __u8    instance;
0242     __u32   flags;
0243     __u16   timeout;
0244     __u16   remaining_time;
0245     __u16   duration;
0246     __u16   adv_data_len;
0247     __u8    adv_data[HCI_MAX_EXT_AD_LENGTH];
0248     bool    adv_data_changed;
0249     __u16   scan_rsp_len;
0250     __u8    scan_rsp_data[HCI_MAX_EXT_AD_LENGTH];
0251     bool    scan_rsp_changed;
0252     __u16   per_adv_data_len;
0253     __u8    per_adv_data[HCI_MAX_PER_AD_LENGTH];
0254     __s8    tx_power;
0255     __u32   min_interval;
0256     __u32   max_interval;
0257     bdaddr_t    random_addr;
0258     bool        rpa_expired;
0259     struct delayed_work rpa_expired_cb;
0260 };
0261 
0262 #define HCI_MAX_ADV_INSTANCES       5
0263 #define HCI_DEFAULT_ADV_DURATION    2
0264 
0265 #define HCI_ADV_TX_POWER_NO_PREFERENCE 0x7F
0266 
0267 #define DATA_CMP(_d1, _l1, _d2, _l2) \
0268     (_l1 == _l2 ? memcmp(_d1, _d2, _l1) : _l1 - _l2)
0269 
0270 #define ADV_DATA_CMP(_adv, _data, _len) \
0271     DATA_CMP((_adv)->adv_data, (_adv)->adv_data_len, _data, _len)
0272 
0273 #define SCAN_RSP_CMP(_adv, _data, _len) \
0274     DATA_CMP((_adv)->scan_rsp_data, (_adv)->scan_rsp_len, _data, _len)
0275 
0276 struct monitored_device {
0277     struct list_head list;
0278 
0279     bdaddr_t bdaddr;
0280     __u8     addr_type;
0281     __u16    handle;
0282     bool     notified;
0283 };
0284 
0285 struct adv_pattern {
0286     struct list_head list;
0287     __u8 ad_type;
0288     __u8 offset;
0289     __u8 length;
0290     __u8 value[HCI_MAX_AD_LENGTH];
0291 };
0292 
0293 struct adv_rssi_thresholds {
0294     __s8 low_threshold;
0295     __s8 high_threshold;
0296     __u16 low_threshold_timeout;
0297     __u16 high_threshold_timeout;
0298     __u8 sampling_period;
0299 };
0300 
0301 struct adv_monitor {
0302     struct list_head patterns;
0303     struct adv_rssi_thresholds rssi;
0304     __u16       handle;
0305 
0306     enum {
0307         ADV_MONITOR_STATE_NOT_REGISTERED,
0308         ADV_MONITOR_STATE_REGISTERED,
0309         ADV_MONITOR_STATE_OFFLOADED
0310     } state;
0311 };
0312 
0313 #define HCI_MIN_ADV_MONITOR_HANDLE      1
0314 #define HCI_MAX_ADV_MONITOR_NUM_HANDLES     32
0315 #define HCI_MAX_ADV_MONITOR_NUM_PATTERNS    16
0316 #define HCI_ADV_MONITOR_EXT_NONE        1
0317 #define HCI_ADV_MONITOR_EXT_MSFT        2
0318 
0319 #define HCI_MAX_SHORT_NAME_LENGTH   10
0320 
0321 #define HCI_CONN_HANDLE_UNSET       0xffff
0322 #define HCI_CONN_HANDLE_MAX     0x0eff
0323 
0324 /* Min encryption key size to match with SMP */
0325 #define HCI_MIN_ENC_KEY_SIZE        7
0326 
0327 /* Default LE RPA expiry time, 15 minutes */
0328 #define HCI_DEFAULT_RPA_TIMEOUT     (15 * 60)
0329 
0330 /* Default min/max age of connection information (1s/3s) */
0331 #define DEFAULT_CONN_INFO_MIN_AGE   1000
0332 #define DEFAULT_CONN_INFO_MAX_AGE   3000
0333 /* Default authenticated payload timeout 30s */
0334 #define DEFAULT_AUTH_PAYLOAD_TIMEOUT   0x0bb8
0335 
0336 struct amp_assoc {
0337     __u16   len;
0338     __u16   offset;
0339     __u16   rem_len;
0340     __u16   len_so_far;
0341     __u8    data[HCI_MAX_AMP_ASSOC_SIZE];
0342 };
0343 
0344 #define HCI_MAX_PAGES   3
0345 
0346 struct hci_dev {
0347     struct list_head list;
0348     struct mutex    lock;
0349 
0350     char        name[8];
0351     unsigned long   flags;
0352     __u16       id;
0353     __u8        bus;
0354     __u8        dev_type;
0355     bdaddr_t    bdaddr;
0356     bdaddr_t    setup_addr;
0357     bdaddr_t    public_addr;
0358     bdaddr_t    random_addr;
0359     bdaddr_t    static_addr;
0360     __u8        adv_addr_type;
0361     __u8        dev_name[HCI_MAX_NAME_LENGTH];
0362     __u8        short_name[HCI_MAX_SHORT_NAME_LENGTH];
0363     __u8        eir[HCI_MAX_EIR_LENGTH];
0364     __u16       appearance;
0365     __u8        dev_class[3];
0366     __u8        major_class;
0367     __u8        minor_class;
0368     __u8        max_page;
0369     __u8        features[HCI_MAX_PAGES][8];
0370     __u8        le_features[8];
0371     __u8        le_accept_list_size;
0372     __u8        le_resolv_list_size;
0373     __u8        le_num_of_adv_sets;
0374     __u8        le_states[8];
0375     __u8        commands[64];
0376     __u8        hci_ver;
0377     __u16       hci_rev;
0378     __u8        lmp_ver;
0379     __u16       manufacturer;
0380     __u16       lmp_subver;
0381     __u16       voice_setting;
0382     __u8        num_iac;
0383     __u16       stored_max_keys;
0384     __u16       stored_num_keys;
0385     __u8        io_capability;
0386     __s8        inq_tx_power;
0387     __u8        err_data_reporting;
0388     __u16       page_scan_interval;
0389     __u16       page_scan_window;
0390     __u8        page_scan_type;
0391     __u8        le_adv_channel_map;
0392     __u16       le_adv_min_interval;
0393     __u16       le_adv_max_interval;
0394     __u8        le_scan_type;
0395     __u16       le_scan_interval;
0396     __u16       le_scan_window;
0397     __u16       le_scan_int_suspend;
0398     __u16       le_scan_window_suspend;
0399     __u16       le_scan_int_discovery;
0400     __u16       le_scan_window_discovery;
0401     __u16       le_scan_int_adv_monitor;
0402     __u16       le_scan_window_adv_monitor;
0403     __u16       le_scan_int_connect;
0404     __u16       le_scan_window_connect;
0405     __u16       le_conn_min_interval;
0406     __u16       le_conn_max_interval;
0407     __u16       le_conn_latency;
0408     __u16       le_supv_timeout;
0409     __u16       le_def_tx_len;
0410     __u16       le_def_tx_time;
0411     __u16       le_max_tx_len;
0412     __u16       le_max_tx_time;
0413     __u16       le_max_rx_len;
0414     __u16       le_max_rx_time;
0415     __u8        le_max_key_size;
0416     __u8        le_min_key_size;
0417     __u16       discov_interleaved_timeout;
0418     __u16       conn_info_min_age;
0419     __u16       conn_info_max_age;
0420     __u16       auth_payload_timeout;
0421     __u8        min_enc_key_size;
0422     __u8        max_enc_key_size;
0423     __u8        pairing_opts;
0424     __u8        ssp_debug_mode;
0425     __u8        hw_error_code;
0426     __u32       clock;
0427     __u16       advmon_allowlist_duration;
0428     __u16       advmon_no_filter_duration;
0429     __u8        enable_advmon_interleave_scan;
0430 
0431     __u16       devid_source;
0432     __u16       devid_vendor;
0433     __u16       devid_product;
0434     __u16       devid_version;
0435 
0436     __u8        def_page_scan_type;
0437     __u16       def_page_scan_int;
0438     __u16       def_page_scan_window;
0439     __u8        def_inq_scan_type;
0440     __u16       def_inq_scan_int;
0441     __u16       def_inq_scan_window;
0442     __u16       def_br_lsto;
0443     __u16       def_page_timeout;
0444     __u16       def_multi_adv_rotation_duration;
0445     __u16       def_le_autoconnect_timeout;
0446     __s8        min_le_tx_power;
0447     __s8        max_le_tx_power;
0448 
0449     __u16       pkt_type;
0450     __u16       esco_type;
0451     __u16       link_policy;
0452     __u16       link_mode;
0453 
0454     __u32       idle_timeout;
0455     __u16       sniff_min_interval;
0456     __u16       sniff_max_interval;
0457 
0458     __u8        amp_status;
0459     __u32       amp_total_bw;
0460     __u32       amp_max_bw;
0461     __u32       amp_min_latency;
0462     __u32       amp_max_pdu;
0463     __u8        amp_type;
0464     __u16       amp_pal_cap;
0465     __u16       amp_assoc_size;
0466     __u32       amp_max_flush_to;
0467     __u32       amp_be_flush_to;
0468 
0469     struct amp_assoc    loc_assoc;
0470 
0471     __u8        flow_ctl_mode;
0472 
0473     unsigned int    auto_accept_delay;
0474 
0475     unsigned long   quirks;
0476 
0477     atomic_t    cmd_cnt;
0478     unsigned int    acl_cnt;
0479     unsigned int    sco_cnt;
0480     unsigned int    le_cnt;
0481     unsigned int    iso_cnt;
0482 
0483     unsigned int    acl_mtu;
0484     unsigned int    sco_mtu;
0485     unsigned int    le_mtu;
0486     unsigned int    iso_mtu;
0487     unsigned int    acl_pkts;
0488     unsigned int    sco_pkts;
0489     unsigned int    le_pkts;
0490     unsigned int    iso_pkts;
0491 
0492     __u16       block_len;
0493     __u16       block_mtu;
0494     __u16       num_blocks;
0495     __u16       block_cnt;
0496 
0497     unsigned long   acl_last_tx;
0498     unsigned long   sco_last_tx;
0499     unsigned long   le_last_tx;
0500 
0501     __u8        le_tx_def_phys;
0502     __u8        le_rx_def_phys;
0503 
0504     struct workqueue_struct *workqueue;
0505     struct workqueue_struct *req_workqueue;
0506 
0507     struct work_struct  power_on;
0508     struct delayed_work power_off;
0509     struct work_struct  error_reset;
0510     struct work_struct  cmd_sync_work;
0511     struct list_head    cmd_sync_work_list;
0512     struct mutex        cmd_sync_work_lock;
0513     struct work_struct  cmd_sync_cancel_work;
0514 
0515     __u16           discov_timeout;
0516     struct delayed_work discov_off;
0517 
0518     struct delayed_work service_cache;
0519 
0520     struct delayed_work cmd_timer;
0521     struct delayed_work ncmd_timer;
0522 
0523     struct work_struct  rx_work;
0524     struct work_struct  cmd_work;
0525     struct work_struct  tx_work;
0526 
0527     struct delayed_work le_scan_disable;
0528     struct delayed_work le_scan_restart;
0529 
0530     struct sk_buff_head rx_q;
0531     struct sk_buff_head raw_q;
0532     struct sk_buff_head cmd_q;
0533 
0534     struct sk_buff      *sent_cmd;
0535     struct sk_buff      *recv_event;
0536 
0537     struct mutex        req_lock;
0538     wait_queue_head_t   req_wait_q;
0539     __u32           req_status;
0540     __u32           req_result;
0541     struct sk_buff      *req_skb;
0542 
0543     void            *smp_data;
0544     void            *smp_bredr_data;
0545 
0546     struct discovery_state  discovery;
0547 
0548     int         discovery_old_state;
0549     bool            discovery_paused;
0550     int         advertising_old_state;
0551     bool            advertising_paused;
0552 
0553     struct notifier_block   suspend_notifier;
0554     enum suspended_state    suspend_state_next;
0555     enum suspended_state    suspend_state;
0556     bool            scanning_paused;
0557     bool            suspended;
0558     u8          wake_reason;
0559     bdaddr_t        wake_addr;
0560     u8          wake_addr_type;
0561 
0562     struct hci_conn_hash    conn_hash;
0563 
0564     struct list_head    mgmt_pending;
0565     struct list_head    reject_list;
0566     struct list_head    accept_list;
0567     struct list_head    uuids;
0568     struct list_head    link_keys;
0569     struct list_head    long_term_keys;
0570     struct list_head    identity_resolving_keys;
0571     struct list_head    remote_oob_data;
0572     struct list_head    le_accept_list;
0573     struct list_head    le_resolv_list;
0574     struct list_head    le_conn_params;
0575     struct list_head    pend_le_conns;
0576     struct list_head    pend_le_reports;
0577     struct list_head    blocked_keys;
0578     struct list_head    local_codecs;
0579 
0580     struct hci_dev_stats    stat;
0581 
0582     atomic_t        promisc;
0583 
0584     const char      *hw_info;
0585     const char      *fw_info;
0586     struct dentry       *debugfs;
0587 
0588     struct device       dev;
0589 
0590     struct rfkill       *rfkill;
0591 
0592     DECLARE_BITMAP(dev_flags, __HCI_NUM_FLAGS);
0593     hci_conn_flags_t    conn_flags;
0594 
0595     __s8            adv_tx_power;
0596     __u8            adv_data[HCI_MAX_EXT_AD_LENGTH];
0597     __u8            adv_data_len;
0598     __u8            scan_rsp_data[HCI_MAX_EXT_AD_LENGTH];
0599     __u8            scan_rsp_data_len;
0600     __u8            per_adv_data[HCI_MAX_PER_AD_LENGTH];
0601     __u8            per_adv_data_len;
0602 
0603     struct list_head    adv_instances;
0604     unsigned int        adv_instance_cnt;
0605     __u8            cur_adv_instance;
0606     __u16           adv_instance_timeout;
0607     struct delayed_work adv_instance_expire;
0608 
0609     struct idr      adv_monitors_idr;
0610     unsigned int        adv_monitors_cnt;
0611 
0612     __u8            irk[16];
0613     __u32           rpa_timeout;
0614     struct delayed_work rpa_expired;
0615     bdaddr_t        rpa;
0616 
0617     enum {
0618         INTERLEAVE_SCAN_NONE,
0619         INTERLEAVE_SCAN_NO_FILTER,
0620         INTERLEAVE_SCAN_ALLOWLIST
0621     } interleave_scan_state;
0622 
0623     struct delayed_work interleave_scan;
0624 
0625     struct list_head    monitored_devices;
0626     bool            advmon_pend_notify;
0627 
0628 #if IS_ENABLED(CONFIG_BT_LEDS)
0629     struct led_trigger  *power_led;
0630 #endif
0631 
0632 #if IS_ENABLED(CONFIG_BT_MSFTEXT)
0633     __u16           msft_opcode;
0634     void            *msft_data;
0635     bool            msft_curve_validity;
0636 #endif
0637 
0638 #if IS_ENABLED(CONFIG_BT_AOSPEXT)
0639     bool            aosp_capable;
0640     bool            aosp_quality_report;
0641 #endif
0642 
0643     int (*open)(struct hci_dev *hdev);
0644     int (*close)(struct hci_dev *hdev);
0645     int (*flush)(struct hci_dev *hdev);
0646     int (*setup)(struct hci_dev *hdev);
0647     int (*shutdown)(struct hci_dev *hdev);
0648     int (*send)(struct hci_dev *hdev, struct sk_buff *skb);
0649     void (*notify)(struct hci_dev *hdev, unsigned int evt);
0650     void (*hw_error)(struct hci_dev *hdev, u8 code);
0651     int (*post_init)(struct hci_dev *hdev);
0652     int (*set_diag)(struct hci_dev *hdev, bool enable);
0653     int (*set_bdaddr)(struct hci_dev *hdev, const bdaddr_t *bdaddr);
0654     void (*cmd_timeout)(struct hci_dev *hdev);
0655     bool (*wakeup)(struct hci_dev *hdev);
0656     int (*set_quality_report)(struct hci_dev *hdev, bool enable);
0657     int (*get_data_path_id)(struct hci_dev *hdev, __u8 *data_path);
0658     int (*get_codec_config_data)(struct hci_dev *hdev, __u8 type,
0659                      struct bt_codec *codec, __u8 *vnd_len,
0660                      __u8 **vnd_data);
0661 };
0662 
0663 #define HCI_PHY_HANDLE(handle)  (handle & 0xff)
0664 
0665 enum conn_reasons {
0666     CONN_REASON_PAIR_DEVICE,
0667     CONN_REASON_L2CAP_CHAN,
0668     CONN_REASON_SCO_CONNECT,
0669     CONN_REASON_ISO_CONNECT,
0670 };
0671 
0672 struct hci_conn {
0673     struct list_head list;
0674 
0675     atomic_t    refcnt;
0676 
0677     bdaddr_t    dst;
0678     __u8        dst_type;
0679     bdaddr_t    src;
0680     __u8        src_type;
0681     bdaddr_t    init_addr;
0682     __u8        init_addr_type;
0683     bdaddr_t    resp_addr;
0684     __u8        resp_addr_type;
0685     __u8        adv_instance;
0686     __u16       handle;
0687     __u16       sync_handle;
0688     __u16       state;
0689     __u8        mode;
0690     __u8        type;
0691     __u8        role;
0692     bool        out;
0693     __u8        attempt;
0694     __u8        dev_class[3];
0695     __u8        features[HCI_MAX_PAGES][8];
0696     __u16       pkt_type;
0697     __u16       link_policy;
0698     __u8        key_type;
0699     __u8        auth_type;
0700     __u8        sec_level;
0701     __u8        pending_sec_level;
0702     __u8        pin_length;
0703     __u8        enc_key_size;
0704     __u8        io_capability;
0705     __u32       passkey_notify;
0706     __u8        passkey_entered;
0707     __u16       disc_timeout;
0708     __u16       conn_timeout;
0709     __u16       setting;
0710     __u16       auth_payload_timeout;
0711     __u16       le_conn_min_interval;
0712     __u16       le_conn_max_interval;
0713     __u16       le_conn_interval;
0714     __u16       le_conn_latency;
0715     __u16       le_supv_timeout;
0716     __u8        le_adv_data[HCI_MAX_AD_LENGTH];
0717     __u8        le_adv_data_len;
0718     __u8        le_per_adv_data[HCI_MAX_PER_AD_LENGTH];
0719     __u8        le_per_adv_data_len;
0720     __u8        le_tx_phy;
0721     __u8        le_rx_phy;
0722     __s8        rssi;
0723     __s8        tx_power;
0724     __s8        max_tx_power;
0725     struct bt_iso_qos iso_qos;
0726     unsigned long   flags;
0727 
0728     enum conn_reasons conn_reason;
0729 
0730     __u32       clock;
0731     __u16       clock_accuracy;
0732 
0733     unsigned long   conn_info_timestamp;
0734 
0735     __u8        remote_cap;
0736     __u8        remote_auth;
0737     __u8        remote_id;
0738 
0739     unsigned int    sent;
0740 
0741     struct sk_buff_head data_q;
0742     struct list_head chan_list;
0743 
0744     struct delayed_work disc_work;
0745     struct delayed_work auto_accept_work;
0746     struct delayed_work idle_work;
0747     struct delayed_work le_conn_timeout;
0748     struct work_struct  le_scan_cleanup;
0749 
0750     struct device   dev;
0751     struct dentry   *debugfs;
0752 
0753     struct hci_dev  *hdev;
0754     void        *l2cap_data;
0755     void        *sco_data;
0756     void        *iso_data;
0757     struct amp_mgr  *amp_mgr;
0758 
0759     struct hci_conn *link;
0760     struct bt_codec codec;
0761 
0762     void (*connect_cfm_cb)  (struct hci_conn *conn, u8 status);
0763     void (*security_cfm_cb) (struct hci_conn *conn, u8 status);
0764     void (*disconn_cfm_cb)  (struct hci_conn *conn, u8 reason);
0765 
0766     void (*cleanup)(struct hci_conn *conn);
0767 };
0768 
0769 struct hci_chan {
0770     struct list_head list;
0771     __u16 handle;
0772     struct hci_conn *conn;
0773     struct sk_buff_head data_q;
0774     unsigned int    sent;
0775     __u8        state;
0776     bool        amp;
0777 };
0778 
0779 struct hci_conn_params {
0780     struct list_head list;
0781     struct list_head action;
0782 
0783     bdaddr_t addr;
0784     u8 addr_type;
0785 
0786     u16 conn_min_interval;
0787     u16 conn_max_interval;
0788     u16 conn_latency;
0789     u16 supervision_timeout;
0790 
0791     enum {
0792         HCI_AUTO_CONN_DISABLED,
0793         HCI_AUTO_CONN_REPORT,
0794         HCI_AUTO_CONN_DIRECT,
0795         HCI_AUTO_CONN_ALWAYS,
0796         HCI_AUTO_CONN_LINK_LOSS,
0797         HCI_AUTO_CONN_EXPLICIT,
0798     } auto_connect;
0799 
0800     struct hci_conn *conn;
0801     bool explicit_connect;
0802     hci_conn_flags_t flags;
0803     u8  privacy_mode;
0804 };
0805 
0806 extern struct list_head hci_dev_list;
0807 extern struct list_head hci_cb_list;
0808 extern rwlock_t hci_dev_list_lock;
0809 extern struct mutex hci_cb_list_lock;
0810 
0811 #define hci_dev_set_flag(hdev, nr)             set_bit((nr), (hdev)->dev_flags)
0812 #define hci_dev_clear_flag(hdev, nr)           clear_bit((nr), (hdev)->dev_flags)
0813 #define hci_dev_change_flag(hdev, nr)          change_bit((nr), (hdev)->dev_flags)
0814 #define hci_dev_test_flag(hdev, nr)            test_bit((nr), (hdev)->dev_flags)
0815 #define hci_dev_test_and_set_flag(hdev, nr)    test_and_set_bit((nr), (hdev)->dev_flags)
0816 #define hci_dev_test_and_clear_flag(hdev, nr)  test_and_clear_bit((nr), (hdev)->dev_flags)
0817 #define hci_dev_test_and_change_flag(hdev, nr) test_and_change_bit((nr), (hdev)->dev_flags)
0818 
0819 #define hci_dev_clear_volatile_flags(hdev)          \
0820     do {                            \
0821         hci_dev_clear_flag(hdev, HCI_LE_SCAN);      \
0822         hci_dev_clear_flag(hdev, HCI_LE_ADV);       \
0823         hci_dev_clear_flag(hdev, HCI_LL_RPA_RESOLUTION);\
0824         hci_dev_clear_flag(hdev, HCI_PERIODIC_INQ); \
0825         hci_dev_clear_flag(hdev, HCI_QUALITY_REPORT);   \
0826     } while (0)
0827 
0828 #define hci_dev_le_state_simultaneous(hdev) \
0829     (test_bit(HCI_QUIRK_VALID_LE_STATES, &hdev->quirks) && \
0830      (hdev->le_states[4] & 0x08) && /* Central */ \
0831      (hdev->le_states[4] & 0x40) && /* Peripheral */ \
0832      (hdev->le_states[3] & 0x10))   /* Simultaneous */
0833 
0834 /* ----- HCI interface to upper protocols ----- */
0835 int l2cap_connect_ind(struct hci_dev *hdev, bdaddr_t *bdaddr);
0836 int l2cap_disconn_ind(struct hci_conn *hcon);
0837 void l2cap_recv_acldata(struct hci_conn *hcon, struct sk_buff *skb, u16 flags);
0838 
0839 #if IS_ENABLED(CONFIG_BT_BREDR)
0840 int sco_connect_ind(struct hci_dev *hdev, bdaddr_t *bdaddr, __u8 *flags);
0841 void sco_recv_scodata(struct hci_conn *hcon, struct sk_buff *skb);
0842 #else
0843 static inline int sco_connect_ind(struct hci_dev *hdev, bdaddr_t *bdaddr,
0844                   __u8 *flags)
0845 {
0846     return 0;
0847 }
0848 
0849 static inline void sco_recv_scodata(struct hci_conn *hcon, struct sk_buff *skb)
0850 {
0851 }
0852 #endif
0853 
0854 #if IS_ENABLED(CONFIG_BT_LE)
0855 int iso_connect_ind(struct hci_dev *hdev, bdaddr_t *bdaddr, __u8 *flags);
0856 void iso_recv(struct hci_conn *hcon, struct sk_buff *skb, u16 flags);
0857 #else
0858 static inline int iso_connect_ind(struct hci_dev *hdev, bdaddr_t *bdaddr,
0859                   __u8 *flags)
0860 {
0861     return 0;
0862 }
0863 static inline void iso_recv(struct hci_conn *hcon, struct sk_buff *skb,
0864                 u16 flags)
0865 {
0866 }
0867 #endif
0868 
0869 /* ----- Inquiry cache ----- */
0870 #define INQUIRY_CACHE_AGE_MAX   (HZ*30)   /* 30 seconds */
0871 #define INQUIRY_ENTRY_AGE_MAX   (HZ*60)   /* 60 seconds */
0872 
0873 static inline void discovery_init(struct hci_dev *hdev)
0874 {
0875     hdev->discovery.state = DISCOVERY_STOPPED;
0876     INIT_LIST_HEAD(&hdev->discovery.all);
0877     INIT_LIST_HEAD(&hdev->discovery.unknown);
0878     INIT_LIST_HEAD(&hdev->discovery.resolve);
0879     hdev->discovery.report_invalid_rssi = true;
0880     hdev->discovery.rssi = HCI_RSSI_INVALID;
0881 }
0882 
0883 static inline void hci_discovery_filter_clear(struct hci_dev *hdev)
0884 {
0885     hdev->discovery.result_filtering = false;
0886     hdev->discovery.report_invalid_rssi = true;
0887     hdev->discovery.rssi = HCI_RSSI_INVALID;
0888     hdev->discovery.uuid_count = 0;
0889     kfree(hdev->discovery.uuids);
0890     hdev->discovery.uuids = NULL;
0891     hdev->discovery.scan_start = 0;
0892     hdev->discovery.scan_duration = 0;
0893 }
0894 
0895 bool hci_discovery_active(struct hci_dev *hdev);
0896 
0897 void hci_discovery_set_state(struct hci_dev *hdev, int state);
0898 
0899 static inline int inquiry_cache_empty(struct hci_dev *hdev)
0900 {
0901     return list_empty(&hdev->discovery.all);
0902 }
0903 
0904 static inline long inquiry_cache_age(struct hci_dev *hdev)
0905 {
0906     struct discovery_state *c = &hdev->discovery;
0907     return jiffies - c->timestamp;
0908 }
0909 
0910 static inline long inquiry_entry_age(struct inquiry_entry *e)
0911 {
0912     return jiffies - e->timestamp;
0913 }
0914 
0915 struct inquiry_entry *hci_inquiry_cache_lookup(struct hci_dev *hdev,
0916                            bdaddr_t *bdaddr);
0917 struct inquiry_entry *hci_inquiry_cache_lookup_unknown(struct hci_dev *hdev,
0918                                bdaddr_t *bdaddr);
0919 struct inquiry_entry *hci_inquiry_cache_lookup_resolve(struct hci_dev *hdev,
0920                                bdaddr_t *bdaddr,
0921                                int state);
0922 void hci_inquiry_cache_update_resolve(struct hci_dev *hdev,
0923                       struct inquiry_entry *ie);
0924 u32 hci_inquiry_cache_update(struct hci_dev *hdev, struct inquiry_data *data,
0925                  bool name_known);
0926 void hci_inquiry_cache_flush(struct hci_dev *hdev);
0927 
0928 /* ----- HCI Connections ----- */
0929 enum {
0930     HCI_CONN_AUTH_PEND,
0931     HCI_CONN_REAUTH_PEND,
0932     HCI_CONN_ENCRYPT_PEND,
0933     HCI_CONN_RSWITCH_PEND,
0934     HCI_CONN_MODE_CHANGE_PEND,
0935     HCI_CONN_SCO_SETUP_PEND,
0936     HCI_CONN_MGMT_CONNECTED,
0937     HCI_CONN_SSP_ENABLED,
0938     HCI_CONN_SC_ENABLED,
0939     HCI_CONN_AES_CCM,
0940     HCI_CONN_POWER_SAVE,
0941     HCI_CONN_FLUSH_KEY,
0942     HCI_CONN_ENCRYPT,
0943     HCI_CONN_AUTH,
0944     HCI_CONN_SECURE,
0945     HCI_CONN_FIPS,
0946     HCI_CONN_STK_ENCRYPT,
0947     HCI_CONN_AUTH_INITIATOR,
0948     HCI_CONN_DROP,
0949     HCI_CONN_PARAM_REMOVAL_PEND,
0950     HCI_CONN_NEW_LINK_KEY,
0951     HCI_CONN_SCANNING,
0952     HCI_CONN_AUTH_FAILURE,
0953     HCI_CONN_PER_ADV,
0954 };
0955 
0956 static inline bool hci_conn_ssp_enabled(struct hci_conn *conn)
0957 {
0958     struct hci_dev *hdev = conn->hdev;
0959     return hci_dev_test_flag(hdev, HCI_SSP_ENABLED) &&
0960            test_bit(HCI_CONN_SSP_ENABLED, &conn->flags);
0961 }
0962 
0963 static inline bool hci_conn_sc_enabled(struct hci_conn *conn)
0964 {
0965     struct hci_dev *hdev = conn->hdev;
0966     return hci_dev_test_flag(hdev, HCI_SC_ENABLED) &&
0967            test_bit(HCI_CONN_SC_ENABLED, &conn->flags);
0968 }
0969 
0970 static inline void hci_conn_hash_add(struct hci_dev *hdev, struct hci_conn *c)
0971 {
0972     struct hci_conn_hash *h = &hdev->conn_hash;
0973     list_add_rcu(&c->list, &h->list);
0974     switch (c->type) {
0975     case ACL_LINK:
0976         h->acl_num++;
0977         break;
0978     case AMP_LINK:
0979         h->amp_num++;
0980         break;
0981     case LE_LINK:
0982         h->le_num++;
0983         if (c->role == HCI_ROLE_SLAVE)
0984             h->le_num_peripheral++;
0985         break;
0986     case SCO_LINK:
0987     case ESCO_LINK:
0988         h->sco_num++;
0989         break;
0990     case ISO_LINK:
0991         h->iso_num++;
0992         break;
0993     }
0994 }
0995 
0996 static inline void hci_conn_hash_del(struct hci_dev *hdev, struct hci_conn *c)
0997 {
0998     struct hci_conn_hash *h = &hdev->conn_hash;
0999 
1000     list_del_rcu(&c->list);
1001     synchronize_rcu();
1002 
1003     switch (c->type) {
1004     case ACL_LINK:
1005         h->acl_num--;
1006         break;
1007     case AMP_LINK:
1008         h->amp_num--;
1009         break;
1010     case LE_LINK:
1011         h->le_num--;
1012         if (c->role == HCI_ROLE_SLAVE)
1013             h->le_num_peripheral--;
1014         break;
1015     case SCO_LINK:
1016     case ESCO_LINK:
1017         h->sco_num--;
1018         break;
1019     case ISO_LINK:
1020         h->iso_num--;
1021         break;
1022     }
1023 }
1024 
1025 static inline unsigned int hci_conn_num(struct hci_dev *hdev, __u8 type)
1026 {
1027     struct hci_conn_hash *h = &hdev->conn_hash;
1028     switch (type) {
1029     case ACL_LINK:
1030         return h->acl_num;
1031     case AMP_LINK:
1032         return h->amp_num;
1033     case LE_LINK:
1034         return h->le_num;
1035     case SCO_LINK:
1036     case ESCO_LINK:
1037         return h->sco_num;
1038     case ISO_LINK:
1039         return h->iso_num;
1040     default:
1041         return 0;
1042     }
1043 }
1044 
1045 static inline unsigned int hci_conn_count(struct hci_dev *hdev)
1046 {
1047     struct hci_conn_hash *c = &hdev->conn_hash;
1048 
1049     return c->acl_num + c->amp_num + c->sco_num + c->le_num + c->iso_num;
1050 }
1051 
1052 static inline __u8 hci_conn_lookup_type(struct hci_dev *hdev, __u16 handle)
1053 {
1054     struct hci_conn_hash *h = &hdev->conn_hash;
1055     struct hci_conn *c;
1056     __u8 type = INVALID_LINK;
1057 
1058     rcu_read_lock();
1059 
1060     list_for_each_entry_rcu(c, &h->list, list) {
1061         if (c->handle == handle) {
1062             type = c->type;
1063             break;
1064         }
1065     }
1066 
1067     rcu_read_unlock();
1068 
1069     return type;
1070 }
1071 
1072 static inline struct hci_conn *hci_conn_hash_lookup_bis(struct hci_dev *hdev,
1073                             bdaddr_t *ba,
1074                             __u8 big, __u8 bis)
1075 {
1076     struct hci_conn_hash *h = &hdev->conn_hash;
1077     struct hci_conn  *c;
1078 
1079     rcu_read_lock();
1080 
1081     list_for_each_entry_rcu(c, &h->list, list) {
1082         if (bacmp(&c->dst, ba) || c->type != ISO_LINK)
1083             continue;
1084 
1085         if (c->iso_qos.big == big && c->iso_qos.bis == bis) {
1086             rcu_read_unlock();
1087             return c;
1088         }
1089     }
1090     rcu_read_unlock();
1091 
1092     return NULL;
1093 }
1094 
1095 static inline struct hci_conn *hci_conn_hash_lookup_handle(struct hci_dev *hdev,
1096                                 __u16 handle)
1097 {
1098     struct hci_conn_hash *h = &hdev->conn_hash;
1099     struct hci_conn  *c;
1100 
1101     rcu_read_lock();
1102 
1103     list_for_each_entry_rcu(c, &h->list, list) {
1104         if (c->handle == handle) {
1105             rcu_read_unlock();
1106             return c;
1107         }
1108     }
1109     rcu_read_unlock();
1110 
1111     return NULL;
1112 }
1113 
1114 static inline struct hci_conn *hci_conn_hash_lookup_ba(struct hci_dev *hdev,
1115                             __u8 type, bdaddr_t *ba)
1116 {
1117     struct hci_conn_hash *h = &hdev->conn_hash;
1118     struct hci_conn  *c;
1119 
1120     rcu_read_lock();
1121 
1122     list_for_each_entry_rcu(c, &h->list, list) {
1123         if (c->type == type && !bacmp(&c->dst, ba)) {
1124             rcu_read_unlock();
1125             return c;
1126         }
1127     }
1128 
1129     rcu_read_unlock();
1130 
1131     return NULL;
1132 }
1133 
1134 static inline struct hci_conn *hci_conn_hash_lookup_le(struct hci_dev *hdev,
1135                                bdaddr_t *ba,
1136                                __u8 ba_type)
1137 {
1138     struct hci_conn_hash *h = &hdev->conn_hash;
1139     struct hci_conn  *c;
1140 
1141     rcu_read_lock();
1142 
1143     list_for_each_entry_rcu(c, &h->list, list) {
1144         if (c->type != LE_LINK)
1145                continue;
1146 
1147         if (ba_type == c->dst_type && !bacmp(&c->dst, ba)) {
1148             rcu_read_unlock();
1149             return c;
1150         }
1151     }
1152 
1153     rcu_read_unlock();
1154 
1155     return NULL;
1156 }
1157 
1158 static inline struct hci_conn *hci_conn_hash_lookup_cis(struct hci_dev *hdev,
1159                             bdaddr_t *ba,
1160                             __u8 ba_type)
1161 {
1162     struct hci_conn_hash *h = &hdev->conn_hash;
1163     struct hci_conn  *c;
1164 
1165     rcu_read_lock();
1166 
1167     list_for_each_entry_rcu(c, &h->list, list) {
1168         if (c->type != ISO_LINK)
1169             continue;
1170 
1171         if (ba_type == c->dst_type && !bacmp(&c->dst, ba)) {
1172             rcu_read_unlock();
1173             return c;
1174         }
1175     }
1176 
1177     rcu_read_unlock();
1178 
1179     return NULL;
1180 }
1181 
1182 static inline struct hci_conn *hci_conn_hash_lookup_cig(struct hci_dev *hdev,
1183                             __u8 handle)
1184 {
1185     struct hci_conn_hash *h = &hdev->conn_hash;
1186     struct hci_conn  *c;
1187 
1188     rcu_read_lock();
1189 
1190     list_for_each_entry_rcu(c, &h->list, list) {
1191         if (c->type != ISO_LINK)
1192             continue;
1193 
1194         if (handle == c->iso_qos.cig) {
1195             rcu_read_unlock();
1196             return c;
1197         }
1198     }
1199 
1200     rcu_read_unlock();
1201 
1202     return NULL;
1203 }
1204 
1205 static inline struct hci_conn *hci_conn_hash_lookup_big(struct hci_dev *hdev,
1206                             __u8 handle)
1207 {
1208     struct hci_conn_hash *h = &hdev->conn_hash;
1209     struct hci_conn  *c;
1210 
1211     rcu_read_lock();
1212 
1213     list_for_each_entry_rcu(c, &h->list, list) {
1214         if (bacmp(&c->dst, BDADDR_ANY) || c->type != ISO_LINK)
1215             continue;
1216 
1217         if (handle == c->iso_qos.big) {
1218             rcu_read_unlock();
1219             return c;
1220         }
1221     }
1222 
1223     rcu_read_unlock();
1224 
1225     return NULL;
1226 }
1227 
1228 static inline struct hci_conn *hci_conn_hash_lookup_state(struct hci_dev *hdev,
1229                             __u8 type, __u16 state)
1230 {
1231     struct hci_conn_hash *h = &hdev->conn_hash;
1232     struct hci_conn  *c;
1233 
1234     rcu_read_lock();
1235 
1236     list_for_each_entry_rcu(c, &h->list, list) {
1237         if (c->type == type && c->state == state) {
1238             rcu_read_unlock();
1239             return c;
1240         }
1241     }
1242 
1243     rcu_read_unlock();
1244 
1245     return NULL;
1246 }
1247 
1248 typedef void (*hci_conn_func_t)(struct hci_conn *conn, void *data);
1249 static inline void hci_conn_hash_list_state(struct hci_dev *hdev,
1250                         hci_conn_func_t func, __u8 type,
1251                         __u16 state, void *data)
1252 {
1253     struct hci_conn_hash *h = &hdev->conn_hash;
1254     struct hci_conn  *c;
1255 
1256     if (!func)
1257         return;
1258 
1259     rcu_read_lock();
1260 
1261     list_for_each_entry_rcu(c, &h->list, list) {
1262         if (c->type == type && c->state == state)
1263             func(c, data);
1264     }
1265 
1266     rcu_read_unlock();
1267 }
1268 
1269 static inline struct hci_conn *hci_lookup_le_connect(struct hci_dev *hdev)
1270 {
1271     struct hci_conn_hash *h = &hdev->conn_hash;
1272     struct hci_conn  *c;
1273 
1274     rcu_read_lock();
1275 
1276     list_for_each_entry_rcu(c, &h->list, list) {
1277         if (c->type == LE_LINK && c->state == BT_CONNECT &&
1278             !test_bit(HCI_CONN_SCANNING, &c->flags)) {
1279             rcu_read_unlock();
1280             return c;
1281         }
1282     }
1283 
1284     rcu_read_unlock();
1285 
1286     return NULL;
1287 }
1288 
1289 int hci_disconnect(struct hci_conn *conn, __u8 reason);
1290 bool hci_setup_sync(struct hci_conn *conn, __u16 handle);
1291 void hci_sco_setup(struct hci_conn *conn, __u8 status);
1292 bool hci_iso_setup_path(struct hci_conn *conn);
1293 int hci_le_create_cis(struct hci_conn *conn);
1294 
1295 struct hci_conn *hci_conn_add(struct hci_dev *hdev, int type, bdaddr_t *dst,
1296                   u8 role);
1297 int hci_conn_del(struct hci_conn *conn);
1298 void hci_conn_hash_flush(struct hci_dev *hdev);
1299 void hci_conn_check_pending(struct hci_dev *hdev);
1300 
1301 struct hci_chan *hci_chan_create(struct hci_conn *conn);
1302 void hci_chan_del(struct hci_chan *chan);
1303 void hci_chan_list_flush(struct hci_conn *conn);
1304 struct hci_chan *hci_chan_lookup_handle(struct hci_dev *hdev, __u16 handle);
1305 
1306 struct hci_conn *hci_connect_le_scan(struct hci_dev *hdev, bdaddr_t *dst,
1307                      u8 dst_type, u8 sec_level,
1308                      u16 conn_timeout,
1309                      enum conn_reasons conn_reason);
1310 struct hci_conn *hci_connect_le(struct hci_dev *hdev, bdaddr_t *dst,
1311                 u8 dst_type, bool dst_resolved, u8 sec_level,
1312                 u16 conn_timeout, u8 role);
1313 struct hci_conn *hci_connect_acl(struct hci_dev *hdev, bdaddr_t *dst,
1314                  u8 sec_level, u8 auth_type,
1315                  enum conn_reasons conn_reason);
1316 struct hci_conn *hci_connect_sco(struct hci_dev *hdev, int type, bdaddr_t *dst,
1317                  __u16 setting, struct bt_codec *codec);
1318 struct hci_conn *hci_bind_cis(struct hci_dev *hdev, bdaddr_t *dst,
1319                   __u8 dst_type, struct bt_iso_qos *qos);
1320 struct hci_conn *hci_connect_cis(struct hci_dev *hdev, bdaddr_t *dst,
1321                  __u8 dst_type, struct bt_iso_qos *qos);
1322 struct hci_conn *hci_connect_bis(struct hci_dev *hdev, bdaddr_t *dst,
1323                  __u8 dst_type, struct bt_iso_qos *qos,
1324                  __u8 data_len, __u8 *data);
1325 int hci_pa_create_sync(struct hci_dev *hdev, bdaddr_t *dst, __u8 dst_type,
1326                __u8 sid);
1327 int hci_le_big_create_sync(struct hci_dev *hdev, struct bt_iso_qos *qos,
1328                __u16 sync_handle, __u8 num_bis, __u8 bis[]);
1329 int hci_conn_check_link_mode(struct hci_conn *conn);
1330 int hci_conn_check_secure(struct hci_conn *conn, __u8 sec_level);
1331 int hci_conn_security(struct hci_conn *conn, __u8 sec_level, __u8 auth_type,
1332               bool initiator);
1333 int hci_conn_switch_role(struct hci_conn *conn, __u8 role);
1334 
1335 void hci_conn_enter_active_mode(struct hci_conn *conn, __u8 force_active);
1336 
1337 void hci_conn_failed(struct hci_conn *conn, u8 status);
1338 
1339 /*
1340  * hci_conn_get() and hci_conn_put() are used to control the life-time of an
1341  * "hci_conn" object. They do not guarantee that the hci_conn object is running,
1342  * working or anything else. They just guarantee that the object is available
1343  * and can be dereferenced. So you can use its locks, local variables and any
1344  * other constant data.
1345  * Before accessing runtime data, you _must_ lock the object and then check that
1346  * it is still running. As soon as you release the locks, the connection might
1347  * get dropped, though.
1348  *
1349  * On the other hand, hci_conn_hold() and hci_conn_drop() are used to control
1350  * how long the underlying connection is held. So every channel that runs on the
1351  * hci_conn object calls this to prevent the connection from disappearing. As
1352  * long as you hold a device, you must also guarantee that you have a valid
1353  * reference to the device via hci_conn_get() (or the initial reference from
1354  * hci_conn_add()).
1355  * The hold()/drop() ref-count is known to drop below 0 sometimes, which doesn't
1356  * break because nobody cares for that. But this means, we cannot use
1357  * _get()/_drop() in it, but require the caller to have a valid ref (FIXME).
1358  */
1359 
1360 static inline struct hci_conn *hci_conn_get(struct hci_conn *conn)
1361 {
1362     get_device(&conn->dev);
1363     return conn;
1364 }
1365 
1366 static inline void hci_conn_put(struct hci_conn *conn)
1367 {
1368     put_device(&conn->dev);
1369 }
1370 
1371 static inline void hci_conn_hold(struct hci_conn *conn)
1372 {
1373     BT_DBG("hcon %p orig refcnt %d", conn, atomic_read(&conn->refcnt));
1374 
1375     atomic_inc(&conn->refcnt);
1376     cancel_delayed_work(&conn->disc_work);
1377 }
1378 
1379 static inline void hci_conn_drop(struct hci_conn *conn)
1380 {
1381     BT_DBG("hcon %p orig refcnt %d", conn, atomic_read(&conn->refcnt));
1382 
1383     if (atomic_dec_and_test(&conn->refcnt)) {
1384         unsigned long timeo;
1385 
1386         switch (conn->type) {
1387         case ACL_LINK:
1388         case LE_LINK:
1389             cancel_delayed_work(&conn->idle_work);
1390             if (conn->state == BT_CONNECTED) {
1391                 timeo = conn->disc_timeout;
1392                 if (!conn->out)
1393                     timeo *= 2;
1394             } else {
1395                 timeo = 0;
1396             }
1397             break;
1398 
1399         case AMP_LINK:
1400             timeo = conn->disc_timeout;
1401             break;
1402 
1403         default:
1404             timeo = 0;
1405             break;
1406         }
1407 
1408         cancel_delayed_work(&conn->disc_work);
1409         queue_delayed_work(conn->hdev->workqueue,
1410                    &conn->disc_work, timeo);
1411     }
1412 }
1413 
1414 /* ----- HCI Devices ----- */
1415 static inline void hci_dev_put(struct hci_dev *d)
1416 {
1417     BT_DBG("%s orig refcnt %d", d->name,
1418            kref_read(&d->dev.kobj.kref));
1419 
1420     put_device(&d->dev);
1421 }
1422 
1423 static inline struct hci_dev *hci_dev_hold(struct hci_dev *d)
1424 {
1425     BT_DBG("%s orig refcnt %d", d->name,
1426            kref_read(&d->dev.kobj.kref));
1427 
1428     get_device(&d->dev);
1429     return d;
1430 }
1431 
1432 #define hci_dev_lock(d)     mutex_lock(&d->lock)
1433 #define hci_dev_unlock(d)   mutex_unlock(&d->lock)
1434 
1435 #define to_hci_dev(d) container_of(d, struct hci_dev, dev)
1436 #define to_hci_conn(c) container_of(c, struct hci_conn, dev)
1437 
1438 static inline void *hci_get_drvdata(struct hci_dev *hdev)
1439 {
1440     return dev_get_drvdata(&hdev->dev);
1441 }
1442 
1443 static inline void hci_set_drvdata(struct hci_dev *hdev, void *data)
1444 {
1445     dev_set_drvdata(&hdev->dev, data);
1446 }
1447 
1448 static inline void *hci_get_priv(struct hci_dev *hdev)
1449 {
1450     return (char *)hdev + sizeof(*hdev);
1451 }
1452 
1453 struct hci_dev *hci_dev_get(int index);
1454 struct hci_dev *hci_get_route(bdaddr_t *dst, bdaddr_t *src, u8 src_type);
1455 
1456 struct hci_dev *hci_alloc_dev_priv(int sizeof_priv);
1457 
1458 static inline struct hci_dev *hci_alloc_dev(void)
1459 {
1460     return hci_alloc_dev_priv(0);
1461 }
1462 
1463 void hci_free_dev(struct hci_dev *hdev);
1464 int hci_register_dev(struct hci_dev *hdev);
1465 void hci_unregister_dev(struct hci_dev *hdev);
1466 void hci_release_dev(struct hci_dev *hdev);
1467 int hci_register_suspend_notifier(struct hci_dev *hdev);
1468 int hci_unregister_suspend_notifier(struct hci_dev *hdev);
1469 int hci_suspend_dev(struct hci_dev *hdev);
1470 int hci_resume_dev(struct hci_dev *hdev);
1471 int hci_reset_dev(struct hci_dev *hdev);
1472 int hci_recv_frame(struct hci_dev *hdev, struct sk_buff *skb);
1473 int hci_recv_diag(struct hci_dev *hdev, struct sk_buff *skb);
1474 __printf(2, 3) void hci_set_hw_info(struct hci_dev *hdev, const char *fmt, ...);
1475 __printf(2, 3) void hci_set_fw_info(struct hci_dev *hdev, const char *fmt, ...);
1476 
1477 static inline void hci_set_msft_opcode(struct hci_dev *hdev, __u16 opcode)
1478 {
1479 #if IS_ENABLED(CONFIG_BT_MSFTEXT)
1480     hdev->msft_opcode = opcode;
1481 #endif
1482 }
1483 
1484 static inline void hci_set_aosp_capable(struct hci_dev *hdev)
1485 {
1486 #if IS_ENABLED(CONFIG_BT_AOSPEXT)
1487     hdev->aosp_capable = true;
1488 #endif
1489 }
1490 
1491 int hci_dev_open(__u16 dev);
1492 int hci_dev_close(__u16 dev);
1493 int hci_dev_do_close(struct hci_dev *hdev);
1494 int hci_dev_reset(__u16 dev);
1495 int hci_dev_reset_stat(__u16 dev);
1496 int hci_dev_cmd(unsigned int cmd, void __user *arg);
1497 int hci_get_dev_list(void __user *arg);
1498 int hci_get_dev_info(void __user *arg);
1499 int hci_get_conn_list(void __user *arg);
1500 int hci_get_conn_info(struct hci_dev *hdev, void __user *arg);
1501 int hci_get_auth_info(struct hci_dev *hdev, void __user *arg);
1502 int hci_inquiry(void __user *arg);
1503 
1504 struct bdaddr_list *hci_bdaddr_list_lookup(struct list_head *list,
1505                        bdaddr_t *bdaddr, u8 type);
1506 struct bdaddr_list_with_irk *hci_bdaddr_list_lookup_with_irk(
1507                     struct list_head *list, bdaddr_t *bdaddr,
1508                     u8 type);
1509 struct bdaddr_list_with_flags *
1510 hci_bdaddr_list_lookup_with_flags(struct list_head *list, bdaddr_t *bdaddr,
1511                   u8 type);
1512 int hci_bdaddr_list_add(struct list_head *list, bdaddr_t *bdaddr, u8 type);
1513 int hci_bdaddr_list_add_with_irk(struct list_head *list, bdaddr_t *bdaddr,
1514                  u8 type, u8 *peer_irk, u8 *local_irk);
1515 int hci_bdaddr_list_add_with_flags(struct list_head *list, bdaddr_t *bdaddr,
1516                    u8 type, u32 flags);
1517 int hci_bdaddr_list_del(struct list_head *list, bdaddr_t *bdaddr, u8 type);
1518 int hci_bdaddr_list_del_with_irk(struct list_head *list, bdaddr_t *bdaddr,
1519                  u8 type);
1520 int hci_bdaddr_list_del_with_flags(struct list_head *list, bdaddr_t *bdaddr,
1521                    u8 type);
1522 void hci_bdaddr_list_clear(struct list_head *list);
1523 
1524 struct hci_conn_params *hci_conn_params_lookup(struct hci_dev *hdev,
1525                            bdaddr_t *addr, u8 addr_type);
1526 struct hci_conn_params *hci_conn_params_add(struct hci_dev *hdev,
1527                         bdaddr_t *addr, u8 addr_type);
1528 void hci_conn_params_del(struct hci_dev *hdev, bdaddr_t *addr, u8 addr_type);
1529 void hci_conn_params_clear_disabled(struct hci_dev *hdev);
1530 
1531 struct hci_conn_params *hci_pend_le_action_lookup(struct list_head *list,
1532                           bdaddr_t *addr,
1533                           u8 addr_type);
1534 
1535 void hci_uuids_clear(struct hci_dev *hdev);
1536 
1537 void hci_link_keys_clear(struct hci_dev *hdev);
1538 struct link_key *hci_find_link_key(struct hci_dev *hdev, bdaddr_t *bdaddr);
1539 struct link_key *hci_add_link_key(struct hci_dev *hdev, struct hci_conn *conn,
1540                   bdaddr_t *bdaddr, u8 *val, u8 type,
1541                   u8 pin_len, bool *persistent);
1542 struct smp_ltk *hci_add_ltk(struct hci_dev *hdev, bdaddr_t *bdaddr,
1543                 u8 addr_type, u8 type, u8 authenticated,
1544                 u8 tk[16], u8 enc_size, __le16 ediv, __le64 rand);
1545 struct smp_ltk *hci_find_ltk(struct hci_dev *hdev, bdaddr_t *bdaddr,
1546                  u8 addr_type, u8 role);
1547 int hci_remove_ltk(struct hci_dev *hdev, bdaddr_t *bdaddr, u8 bdaddr_type);
1548 void hci_smp_ltks_clear(struct hci_dev *hdev);
1549 int hci_remove_link_key(struct hci_dev *hdev, bdaddr_t *bdaddr);
1550 
1551 struct smp_irk *hci_find_irk_by_rpa(struct hci_dev *hdev, bdaddr_t *rpa);
1552 struct smp_irk *hci_find_irk_by_addr(struct hci_dev *hdev, bdaddr_t *bdaddr,
1553                      u8 addr_type);
1554 struct smp_irk *hci_add_irk(struct hci_dev *hdev, bdaddr_t *bdaddr,
1555                 u8 addr_type, u8 val[16], bdaddr_t *rpa);
1556 void hci_remove_irk(struct hci_dev *hdev, bdaddr_t *bdaddr, u8 addr_type);
1557 bool hci_is_blocked_key(struct hci_dev *hdev, u8 type, u8 val[16]);
1558 void hci_blocked_keys_clear(struct hci_dev *hdev);
1559 void hci_smp_irks_clear(struct hci_dev *hdev);
1560 
1561 bool hci_bdaddr_is_paired(struct hci_dev *hdev, bdaddr_t *bdaddr, u8 type);
1562 
1563 void hci_remote_oob_data_clear(struct hci_dev *hdev);
1564 struct oob_data *hci_find_remote_oob_data(struct hci_dev *hdev,
1565                       bdaddr_t *bdaddr, u8 bdaddr_type);
1566 int hci_add_remote_oob_data(struct hci_dev *hdev, bdaddr_t *bdaddr,
1567                 u8 bdaddr_type, u8 *hash192, u8 *rand192,
1568                 u8 *hash256, u8 *rand256);
1569 int hci_remove_remote_oob_data(struct hci_dev *hdev, bdaddr_t *bdaddr,
1570                    u8 bdaddr_type);
1571 
1572 void hci_adv_instances_clear(struct hci_dev *hdev);
1573 struct adv_info *hci_find_adv_instance(struct hci_dev *hdev, u8 instance);
1574 struct adv_info *hci_get_next_instance(struct hci_dev *hdev, u8 instance);
1575 struct adv_info *hci_add_adv_instance(struct hci_dev *hdev, u8 instance,
1576                       u32 flags, u16 adv_data_len, u8 *adv_data,
1577                       u16 scan_rsp_len, u8 *scan_rsp_data,
1578                       u16 timeout, u16 duration, s8 tx_power,
1579                       u32 min_interval, u32 max_interval);
1580 struct adv_info *hci_add_per_instance(struct hci_dev *hdev, u8 instance,
1581                       u32 flags, u8 data_len, u8 *data,
1582                       u32 min_interval, u32 max_interval);
1583 int hci_set_adv_instance_data(struct hci_dev *hdev, u8 instance,
1584              u16 adv_data_len, u8 *adv_data,
1585              u16 scan_rsp_len, u8 *scan_rsp_data);
1586 int hci_remove_adv_instance(struct hci_dev *hdev, u8 instance);
1587 void hci_adv_instances_set_rpa_expired(struct hci_dev *hdev, bool rpa_expired);
1588 u32 hci_adv_instance_flags(struct hci_dev *hdev, u8 instance);
1589 bool hci_adv_instance_is_scannable(struct hci_dev *hdev, u8 instance);
1590 
1591 void hci_adv_monitors_clear(struct hci_dev *hdev);
1592 void hci_free_adv_monitor(struct hci_dev *hdev, struct adv_monitor *monitor);
1593 int hci_add_adv_monitor(struct hci_dev *hdev, struct adv_monitor *monitor);
1594 int hci_remove_single_adv_monitor(struct hci_dev *hdev, u16 handle);
1595 int hci_remove_all_adv_monitor(struct hci_dev *hdev);
1596 bool hci_is_adv_monitoring(struct hci_dev *hdev);
1597 int hci_get_adv_monitor_offload_ext(struct hci_dev *hdev);
1598 
1599 void hci_event_packet(struct hci_dev *hdev, struct sk_buff *skb);
1600 
1601 void hci_init_sysfs(struct hci_dev *hdev);
1602 void hci_conn_init_sysfs(struct hci_conn *conn);
1603 void hci_conn_add_sysfs(struct hci_conn *conn);
1604 void hci_conn_del_sysfs(struct hci_conn *conn);
1605 
1606 #define SET_HCIDEV_DEV(hdev, pdev) ((hdev)->dev.parent = (pdev))
1607 
1608 /* ----- LMP capabilities ----- */
1609 #define lmp_encrypt_capable(dev)   ((dev)->features[0][0] & LMP_ENCRYPT)
1610 #define lmp_rswitch_capable(dev)   ((dev)->features[0][0] & LMP_RSWITCH)
1611 #define lmp_hold_capable(dev)      ((dev)->features[0][0] & LMP_HOLD)
1612 #define lmp_sniff_capable(dev)     ((dev)->features[0][0] & LMP_SNIFF)
1613 #define lmp_park_capable(dev)      ((dev)->features[0][1] & LMP_PARK)
1614 #define lmp_inq_rssi_capable(dev)  ((dev)->features[0][3] & LMP_RSSI_INQ)
1615 #define lmp_esco_capable(dev)      ((dev)->features[0][3] & LMP_ESCO)
1616 #define lmp_bredr_capable(dev)     (!((dev)->features[0][4] & LMP_NO_BREDR))
1617 #define lmp_le_capable(dev)        ((dev)->features[0][4] & LMP_LE)
1618 #define lmp_sniffsubr_capable(dev) ((dev)->features[0][5] & LMP_SNIFF_SUBR)
1619 #define lmp_pause_enc_capable(dev) ((dev)->features[0][5] & LMP_PAUSE_ENC)
1620 #define lmp_esco_2m_capable(dev)   ((dev)->features[0][5] & LMP_EDR_ESCO_2M)
1621 #define lmp_ext_inq_capable(dev)   ((dev)->features[0][6] & LMP_EXT_INQ)
1622 #define lmp_le_br_capable(dev)     (!!((dev)->features[0][6] & LMP_SIMUL_LE_BR))
1623 #define lmp_ssp_capable(dev)       ((dev)->features[0][6] & LMP_SIMPLE_PAIR)
1624 #define lmp_no_flush_capable(dev)  ((dev)->features[0][6] & LMP_NO_FLUSH)
1625 #define lmp_lsto_capable(dev)      ((dev)->features[0][7] & LMP_LSTO)
1626 #define lmp_inq_tx_pwr_capable(dev) ((dev)->features[0][7] & LMP_INQ_TX_PWR)
1627 #define lmp_ext_feat_capable(dev)  ((dev)->features[0][7] & LMP_EXTFEATURES)
1628 #define lmp_transp_capable(dev)    ((dev)->features[0][2] & LMP_TRANSPARENT)
1629 #define lmp_edr_2m_capable(dev)    ((dev)->features[0][3] & LMP_EDR_2M)
1630 #define lmp_edr_3m_capable(dev)    ((dev)->features[0][3] & LMP_EDR_3M)
1631 #define lmp_edr_3slot_capable(dev) ((dev)->features[0][4] & LMP_EDR_3SLOT)
1632 #define lmp_edr_5slot_capable(dev) ((dev)->features[0][5] & LMP_EDR_5SLOT)
1633 
1634 /* ----- Extended LMP capabilities ----- */
1635 #define lmp_cpb_central_capable(dev) ((dev)->features[2][0] & LMP_CPB_CENTRAL)
1636 #define lmp_cpb_peripheral_capable(dev) ((dev)->features[2][0] & LMP_CPB_PERIPHERAL)
1637 #define lmp_sync_train_capable(dev) ((dev)->features[2][0] & LMP_SYNC_TRAIN)
1638 #define lmp_sync_scan_capable(dev)  ((dev)->features[2][0] & LMP_SYNC_SCAN)
1639 #define lmp_sc_capable(dev)         ((dev)->features[2][1] & LMP_SC)
1640 #define lmp_ping_capable(dev)       ((dev)->features[2][1] & LMP_PING)
1641 
1642 /* ----- Host capabilities ----- */
1643 #define lmp_host_ssp_capable(dev)  ((dev)->features[1][0] & LMP_HOST_SSP)
1644 #define lmp_host_sc_capable(dev)   ((dev)->features[1][0] & LMP_HOST_SC)
1645 #define lmp_host_le_capable(dev)   (!!((dev)->features[1][0] & LMP_HOST_LE))
1646 #define lmp_host_le_br_capable(dev) (!!((dev)->features[1][0] & LMP_HOST_LE_BREDR))
1647 
1648 #define hdev_is_powered(dev)   (test_bit(HCI_UP, &(dev)->flags) && \
1649                 !hci_dev_test_flag(dev, HCI_AUTO_OFF))
1650 #define bredr_sc_enabled(dev)  (lmp_sc_capable(dev) && \
1651                 hci_dev_test_flag(dev, HCI_SC_ENABLED))
1652 #define rpa_valid(dev)         (bacmp(&dev->rpa, BDADDR_ANY) && \
1653                 !hci_dev_test_flag(dev, HCI_RPA_EXPIRED))
1654 #define adv_rpa_valid(adv)     (bacmp(&adv->random_addr, BDADDR_ANY) && \
1655                 !adv->rpa_expired)
1656 
1657 #define scan_1m(dev) (((dev)->le_tx_def_phys & HCI_LE_SET_PHY_1M) || \
1658               ((dev)->le_rx_def_phys & HCI_LE_SET_PHY_1M))
1659 
1660 #define scan_2m(dev) (((dev)->le_tx_def_phys & HCI_LE_SET_PHY_2M) || \
1661               ((dev)->le_rx_def_phys & HCI_LE_SET_PHY_2M))
1662 
1663 #define scan_coded(dev) (((dev)->le_tx_def_phys & HCI_LE_SET_PHY_CODED) || \
1664              ((dev)->le_rx_def_phys & HCI_LE_SET_PHY_CODED))
1665 
1666 #define ll_privacy_capable(dev) ((dev)->le_features[0] & HCI_LE_LL_PRIVACY)
1667 
1668 /* Use LL Privacy based address resolution if supported */
1669 #define use_ll_privacy(dev) (ll_privacy_capable(dev) && \
1670                  hci_dev_test_flag(dev, HCI_ENABLE_LL_PRIVACY))
1671 
1672 #define privacy_mode_capable(dev) (use_ll_privacy(dev) && \
1673                    (hdev->commands[39] & 0x04))
1674 
1675 /* Use enhanced synchronous connection if command is supported and its quirk
1676  * has not been set.
1677  */
1678 #define enhanced_sync_conn_capable(dev) \
1679     (((dev)->commands[29] & 0x08) && \
1680      !test_bit(HCI_QUIRK_BROKEN_ENHANCED_SETUP_SYNC_CONN, &(dev)->quirks))
1681 
1682 /* Use ext scanning if set ext scan param and ext scan enable is supported */
1683 #define use_ext_scan(dev) (((dev)->commands[37] & 0x20) && \
1684                ((dev)->commands[37] & 0x40))
1685 /* Use ext create connection if command is supported */
1686 #define use_ext_conn(dev) ((dev)->commands[37] & 0x80)
1687 
1688 /* Extended advertising support */
1689 #define ext_adv_capable(dev) (((dev)->le_features[1] & HCI_LE_EXT_ADV))
1690 
1691 /* BLUETOOTH CORE SPECIFICATION Version 5.3 | Vol 4, Part E page 1789:
1692  *
1693  * C24: Mandatory if the LE Controller supports Connection State and either
1694  * LE Feature (LL Privacy) or LE Feature (Extended Advertising) is supported
1695  */
1696 #define use_enhanced_conn_complete(dev) (ll_privacy_capable(dev) || \
1697                      ext_adv_capable(dev))
1698 
1699 /* Periodic advertising support */
1700 #define per_adv_capable(dev) (((dev)->le_features[1] & HCI_LE_PERIODIC_ADV))
1701 
1702 /* CIS Master/Slave and BIS support */
1703 #define iso_capable(dev) (cis_capable(dev) || bis_capable(dev))
1704 #define cis_capable(dev) \
1705     (cis_central_capable(dev) || cis_peripheral_capable(dev))
1706 #define cis_central_capable(dev) \
1707     ((dev)->le_features[3] & HCI_LE_CIS_CENTRAL)
1708 #define cis_peripheral_capable(dev) \
1709     ((dev)->le_features[3] & HCI_LE_CIS_PERIPHERAL)
1710 #define bis_capable(dev) ((dev)->le_features[3] & HCI_LE_ISO_BROADCASTER)
1711 
1712 /* ----- HCI protocols ----- */
1713 #define HCI_PROTO_DEFER             0x01
1714 
1715 static inline int hci_proto_connect_ind(struct hci_dev *hdev, bdaddr_t *bdaddr,
1716                     __u8 type, __u8 *flags)
1717 {
1718     switch (type) {
1719     case ACL_LINK:
1720         return l2cap_connect_ind(hdev, bdaddr);
1721 
1722     case SCO_LINK:
1723     case ESCO_LINK:
1724         return sco_connect_ind(hdev, bdaddr, flags);
1725 
1726     case ISO_LINK:
1727         return iso_connect_ind(hdev, bdaddr, flags);
1728 
1729     default:
1730         BT_ERR("unknown link type %d", type);
1731         return -EINVAL;
1732     }
1733 }
1734 
1735 static inline int hci_proto_disconn_ind(struct hci_conn *conn)
1736 {
1737     if (conn->type != ACL_LINK && conn->type != LE_LINK)
1738         return HCI_ERROR_REMOTE_USER_TERM;
1739 
1740     return l2cap_disconn_ind(conn);
1741 }
1742 
1743 /* ----- HCI callbacks ----- */
1744 struct hci_cb {
1745     struct list_head list;
1746 
1747     char *name;
1748 
1749     void (*connect_cfm) (struct hci_conn *conn, __u8 status);
1750     void (*disconn_cfm) (struct hci_conn *conn, __u8 status);
1751     void (*security_cfm)    (struct hci_conn *conn, __u8 status,
1752                                 __u8 encrypt);
1753     void (*key_change_cfm)  (struct hci_conn *conn, __u8 status);
1754     void (*role_switch_cfm) (struct hci_conn *conn, __u8 status, __u8 role);
1755 };
1756 
1757 static inline void hci_connect_cfm(struct hci_conn *conn, __u8 status)
1758 {
1759     struct hci_cb *cb;
1760 
1761     mutex_lock(&hci_cb_list_lock);
1762     list_for_each_entry(cb, &hci_cb_list, list) {
1763         if (cb->connect_cfm)
1764             cb->connect_cfm(conn, status);
1765     }
1766     mutex_unlock(&hci_cb_list_lock);
1767 
1768     if (conn->connect_cfm_cb)
1769         conn->connect_cfm_cb(conn, status);
1770 }
1771 
1772 static inline void hci_disconn_cfm(struct hci_conn *conn, __u8 reason)
1773 {
1774     struct hci_cb *cb;
1775 
1776     mutex_lock(&hci_cb_list_lock);
1777     list_for_each_entry(cb, &hci_cb_list, list) {
1778         if (cb->disconn_cfm)
1779             cb->disconn_cfm(conn, reason);
1780     }
1781     mutex_unlock(&hci_cb_list_lock);
1782 
1783     if (conn->disconn_cfm_cb)
1784         conn->disconn_cfm_cb(conn, reason);
1785 }
1786 
1787 static inline void hci_auth_cfm(struct hci_conn *conn, __u8 status)
1788 {
1789     struct hci_cb *cb;
1790     __u8 encrypt;
1791 
1792     if (test_bit(HCI_CONN_ENCRYPT_PEND, &conn->flags))
1793         return;
1794 
1795     encrypt = test_bit(HCI_CONN_ENCRYPT, &conn->flags) ? 0x01 : 0x00;
1796 
1797     mutex_lock(&hci_cb_list_lock);
1798     list_for_each_entry(cb, &hci_cb_list, list) {
1799         if (cb->security_cfm)
1800             cb->security_cfm(conn, status, encrypt);
1801     }
1802     mutex_unlock(&hci_cb_list_lock);
1803 
1804     if (conn->security_cfm_cb)
1805         conn->security_cfm_cb(conn, status);
1806 }
1807 
1808 static inline void hci_encrypt_cfm(struct hci_conn *conn, __u8 status)
1809 {
1810     struct hci_cb *cb;
1811     __u8 encrypt;
1812 
1813     if (conn->state == BT_CONFIG) {
1814         if (!status)
1815             conn->state = BT_CONNECTED;
1816 
1817         hci_connect_cfm(conn, status);
1818         hci_conn_drop(conn);
1819         return;
1820     }
1821 
1822     if (!test_bit(HCI_CONN_ENCRYPT, &conn->flags))
1823         encrypt = 0x00;
1824     else if (test_bit(HCI_CONN_AES_CCM, &conn->flags))
1825         encrypt = 0x02;
1826     else
1827         encrypt = 0x01;
1828 
1829     if (!status) {
1830         if (conn->sec_level == BT_SECURITY_SDP)
1831             conn->sec_level = BT_SECURITY_LOW;
1832 
1833         if (conn->pending_sec_level > conn->sec_level)
1834             conn->sec_level = conn->pending_sec_level;
1835     }
1836 
1837     mutex_lock(&hci_cb_list_lock);
1838     list_for_each_entry(cb, &hci_cb_list, list) {
1839         if (cb->security_cfm)
1840             cb->security_cfm(conn, status, encrypt);
1841     }
1842     mutex_unlock(&hci_cb_list_lock);
1843 
1844     if (conn->security_cfm_cb)
1845         conn->security_cfm_cb(conn, status);
1846 }
1847 
1848 static inline void hci_key_change_cfm(struct hci_conn *conn, __u8 status)
1849 {
1850     struct hci_cb *cb;
1851 
1852     mutex_lock(&hci_cb_list_lock);
1853     list_for_each_entry(cb, &hci_cb_list, list) {
1854         if (cb->key_change_cfm)
1855             cb->key_change_cfm(conn, status);
1856     }
1857     mutex_unlock(&hci_cb_list_lock);
1858 }
1859 
1860 static inline void hci_role_switch_cfm(struct hci_conn *conn, __u8 status,
1861                                 __u8 role)
1862 {
1863     struct hci_cb *cb;
1864 
1865     mutex_lock(&hci_cb_list_lock);
1866     list_for_each_entry(cb, &hci_cb_list, list) {
1867         if (cb->role_switch_cfm)
1868             cb->role_switch_cfm(conn, status, role);
1869     }
1870     mutex_unlock(&hci_cb_list_lock);
1871 }
1872 
1873 static inline bool hci_bdaddr_is_rpa(bdaddr_t *bdaddr, u8 addr_type)
1874 {
1875     if (addr_type != ADDR_LE_DEV_RANDOM)
1876         return false;
1877 
1878     if ((bdaddr->b[5] & 0xc0) == 0x40)
1879            return true;
1880 
1881     return false;
1882 }
1883 
1884 static inline bool hci_is_identity_address(bdaddr_t *addr, u8 addr_type)
1885 {
1886     if (addr_type == ADDR_LE_DEV_PUBLIC)
1887         return true;
1888 
1889     /* Check for Random Static address type */
1890     if ((addr->b[5] & 0xc0) == 0xc0)
1891         return true;
1892 
1893     return false;
1894 }
1895 
1896 static inline struct smp_irk *hci_get_irk(struct hci_dev *hdev,
1897                       bdaddr_t *bdaddr, u8 addr_type)
1898 {
1899     if (!hci_bdaddr_is_rpa(bdaddr, addr_type))
1900         return NULL;
1901 
1902     return hci_find_irk_by_rpa(hdev, bdaddr);
1903 }
1904 
1905 static inline int hci_check_conn_params(u16 min, u16 max, u16 latency,
1906                     u16 to_multiplier)
1907 {
1908     u16 max_latency;
1909 
1910     if (min > max || min < 6 || max > 3200)
1911         return -EINVAL;
1912 
1913     if (to_multiplier < 10 || to_multiplier > 3200)
1914         return -EINVAL;
1915 
1916     if (max >= to_multiplier * 8)
1917         return -EINVAL;
1918 
1919     max_latency = (to_multiplier * 4 / max) - 1;
1920     if (latency > 499 || latency > max_latency)
1921         return -EINVAL;
1922 
1923     return 0;
1924 }
1925 
1926 int hci_register_cb(struct hci_cb *hcb);
1927 int hci_unregister_cb(struct hci_cb *hcb);
1928 
1929 int __hci_cmd_send(struct hci_dev *hdev, u16 opcode, u32 plen,
1930            const void *param);
1931 
1932 int hci_send_cmd(struct hci_dev *hdev, __u16 opcode, __u32 plen,
1933          const void *param);
1934 void hci_send_acl(struct hci_chan *chan, struct sk_buff *skb, __u16 flags);
1935 void hci_send_sco(struct hci_conn *conn, struct sk_buff *skb);
1936 void hci_send_iso(struct hci_conn *conn, struct sk_buff *skb);
1937 
1938 void *hci_sent_cmd_data(struct hci_dev *hdev, __u16 opcode);
1939 void *hci_recv_event_data(struct hci_dev *hdev, __u8 event);
1940 
1941 u32 hci_conn_get_phy(struct hci_conn *conn);
1942 
1943 /* ----- HCI Sockets ----- */
1944 void hci_send_to_sock(struct hci_dev *hdev, struct sk_buff *skb);
1945 void hci_send_to_channel(unsigned short channel, struct sk_buff *skb,
1946              int flag, struct sock *skip_sk);
1947 void hci_send_to_monitor(struct hci_dev *hdev, struct sk_buff *skb);
1948 void hci_send_monitor_ctrl_event(struct hci_dev *hdev, u16 event,
1949                  void *data, u16 data_len, ktime_t tstamp,
1950                  int flag, struct sock *skip_sk);
1951 
1952 void hci_sock_dev_event(struct hci_dev *hdev, int event);
1953 
1954 #define HCI_MGMT_VAR_LEN    BIT(0)
1955 #define HCI_MGMT_NO_HDEV    BIT(1)
1956 #define HCI_MGMT_UNTRUSTED  BIT(2)
1957 #define HCI_MGMT_UNCONFIGURED   BIT(3)
1958 #define HCI_MGMT_HDEV_OPTIONAL  BIT(4)
1959 
1960 struct hci_mgmt_handler {
1961     int (*func) (struct sock *sk, struct hci_dev *hdev, void *data,
1962              u16 data_len);
1963     size_t data_len;
1964     unsigned long flags;
1965 };
1966 
1967 struct hci_mgmt_chan {
1968     struct list_head list;
1969     unsigned short channel;
1970     size_t handler_count;
1971     const struct hci_mgmt_handler *handlers;
1972     void (*hdev_init) (struct sock *sk, struct hci_dev *hdev);
1973 };
1974 
1975 int hci_mgmt_chan_register(struct hci_mgmt_chan *c);
1976 void hci_mgmt_chan_unregister(struct hci_mgmt_chan *c);
1977 
1978 /* Management interface */
1979 #define DISCOV_TYPE_BREDR       (BIT(BDADDR_BREDR))
1980 #define DISCOV_TYPE_LE          (BIT(BDADDR_LE_PUBLIC) | \
1981                      BIT(BDADDR_LE_RANDOM))
1982 #define DISCOV_TYPE_INTERLEAVED     (BIT(BDADDR_BREDR) | \
1983                      BIT(BDADDR_LE_PUBLIC) | \
1984                      BIT(BDADDR_LE_RANDOM))
1985 
1986 /* These LE scan and inquiry parameters were chosen according to LE General
1987  * Discovery Procedure specification.
1988  */
1989 #define DISCOV_LE_SCAN_WIN      0x12
1990 #define DISCOV_LE_SCAN_INT      0x12
1991 #define DISCOV_LE_TIMEOUT       10240   /* msec */
1992 #define DISCOV_INTERLEAVED_TIMEOUT  5120    /* msec */
1993 #define DISCOV_INTERLEAVED_INQUIRY_LEN  0x04
1994 #define DISCOV_BREDR_INQUIRY_LEN    0x08
1995 #define DISCOV_LE_RESTART_DELAY     msecs_to_jiffies(200)   /* msec */
1996 #define DISCOV_LE_FAST_ADV_INT_MIN  0x00A0  /* 100 msec */
1997 #define DISCOV_LE_FAST_ADV_INT_MAX  0x00F0  /* 150 msec */
1998 #define DISCOV_LE_PER_ADV_INT_MIN   0x00A0  /* 200 msec */
1999 #define DISCOV_LE_PER_ADV_INT_MAX   0x00A0  /* 200 msec */
2000 
2001 #define NAME_RESOLVE_DURATION       msecs_to_jiffies(10240) /* 10.24 sec */
2002 
2003 void mgmt_fill_version_info(void *ver);
2004 int mgmt_new_settings(struct hci_dev *hdev);
2005 void mgmt_index_added(struct hci_dev *hdev);
2006 void mgmt_index_removed(struct hci_dev *hdev);
2007 void mgmt_set_powered_failed(struct hci_dev *hdev, int err);
2008 void mgmt_power_on(struct hci_dev *hdev, int err);
2009 void __mgmt_power_off(struct hci_dev *hdev);
2010 void mgmt_new_link_key(struct hci_dev *hdev, struct link_key *key,
2011                bool persistent);
2012 void mgmt_device_connected(struct hci_dev *hdev, struct hci_conn *conn,
2013                u8 *name, u8 name_len);
2014 void mgmt_device_disconnected(struct hci_dev *hdev, bdaddr_t *bdaddr,
2015                   u8 link_type, u8 addr_type, u8 reason,
2016                   bool mgmt_connected);
2017 void mgmt_disconnect_failed(struct hci_dev *hdev, bdaddr_t *bdaddr,
2018                 u8 link_type, u8 addr_type, u8 status);
2019 void mgmt_connect_failed(struct hci_dev *hdev, bdaddr_t *bdaddr, u8 link_type,
2020              u8 addr_type, u8 status);
2021 void mgmt_pin_code_request(struct hci_dev *hdev, bdaddr_t *bdaddr, u8 secure);
2022 void mgmt_pin_code_reply_complete(struct hci_dev *hdev, bdaddr_t *bdaddr,
2023                   u8 status);
2024 void mgmt_pin_code_neg_reply_complete(struct hci_dev *hdev, bdaddr_t *bdaddr,
2025                       u8 status);
2026 int mgmt_user_confirm_request(struct hci_dev *hdev, bdaddr_t *bdaddr,
2027                   u8 link_type, u8 addr_type, u32 value,
2028                   u8 confirm_hint);
2029 int mgmt_user_confirm_reply_complete(struct hci_dev *hdev, bdaddr_t *bdaddr,
2030                      u8 link_type, u8 addr_type, u8 status);
2031 int mgmt_user_confirm_neg_reply_complete(struct hci_dev *hdev, bdaddr_t *bdaddr,
2032                      u8 link_type, u8 addr_type, u8 status);
2033 int mgmt_user_passkey_request(struct hci_dev *hdev, bdaddr_t *bdaddr,
2034                   u8 link_type, u8 addr_type);
2035 int mgmt_user_passkey_reply_complete(struct hci_dev *hdev, bdaddr_t *bdaddr,
2036                      u8 link_type, u8 addr_type, u8 status);
2037 int mgmt_user_passkey_neg_reply_complete(struct hci_dev *hdev, bdaddr_t *bdaddr,
2038                      u8 link_type, u8 addr_type, u8 status);
2039 int mgmt_user_passkey_notify(struct hci_dev *hdev, bdaddr_t *bdaddr,
2040                  u8 link_type, u8 addr_type, u32 passkey,
2041                  u8 entered);
2042 void mgmt_auth_failed(struct hci_conn *conn, u8 status);
2043 void mgmt_auth_enable_complete(struct hci_dev *hdev, u8 status);
2044 void mgmt_set_class_of_dev_complete(struct hci_dev *hdev, u8 *dev_class,
2045                     u8 status);
2046 void mgmt_set_local_name_complete(struct hci_dev *hdev, u8 *name, u8 status);
2047 void mgmt_start_discovery_complete(struct hci_dev *hdev, u8 status);
2048 void mgmt_stop_discovery_complete(struct hci_dev *hdev, u8 status);
2049 void mgmt_device_found(struct hci_dev *hdev, bdaddr_t *bdaddr, u8 link_type,
2050                u8 addr_type, u8 *dev_class, s8 rssi, u32 flags,
2051                u8 *eir, u16 eir_len, u8 *scan_rsp, u8 scan_rsp_len);
2052 void mgmt_remote_name(struct hci_dev *hdev, bdaddr_t *bdaddr, u8 link_type,
2053               u8 addr_type, s8 rssi, u8 *name, u8 name_len);
2054 void mgmt_discovering(struct hci_dev *hdev, u8 discovering);
2055 void mgmt_suspending(struct hci_dev *hdev, u8 state);
2056 void mgmt_resuming(struct hci_dev *hdev, u8 reason, bdaddr_t *bdaddr,
2057            u8 addr_type);
2058 bool mgmt_powering_down(struct hci_dev *hdev);
2059 void mgmt_new_ltk(struct hci_dev *hdev, struct smp_ltk *key, bool persistent);
2060 void mgmt_new_irk(struct hci_dev *hdev, struct smp_irk *irk, bool persistent);
2061 void mgmt_new_csrk(struct hci_dev *hdev, struct smp_csrk *csrk,
2062            bool persistent);
2063 void mgmt_new_conn_param(struct hci_dev *hdev, bdaddr_t *bdaddr,
2064              u8 bdaddr_type, u8 store_hint, u16 min_interval,
2065              u16 max_interval, u16 latency, u16 timeout);
2066 void mgmt_smp_complete(struct hci_conn *conn, bool complete);
2067 bool mgmt_get_connectable(struct hci_dev *hdev);
2068 u8 mgmt_get_adv_discov_flags(struct hci_dev *hdev);
2069 void mgmt_advertising_added(struct sock *sk, struct hci_dev *hdev,
2070                 u8 instance);
2071 void mgmt_advertising_removed(struct sock *sk, struct hci_dev *hdev,
2072                   u8 instance);
2073 void mgmt_adv_monitor_removed(struct hci_dev *hdev, u16 handle);
2074 int mgmt_phy_configuration_changed(struct hci_dev *hdev, struct sock *skip);
2075 void mgmt_adv_monitor_device_lost(struct hci_dev *hdev, u16 handle,
2076                   bdaddr_t *bdaddr, u8 addr_type);
2077 
2078 u8 hci_le_conn_update(struct hci_conn *conn, u16 min, u16 max, u16 latency,
2079               u16 to_multiplier);
2080 void hci_le_start_enc(struct hci_conn *conn, __le16 ediv, __le64 rand,
2081               __u8 ltk[16], __u8 key_size);
2082 
2083 void hci_copy_identity_address(struct hci_dev *hdev, bdaddr_t *bdaddr,
2084                    u8 *bdaddr_type);
2085 
2086 #define SCO_AIRMODE_MASK       0x0003
2087 #define SCO_AIRMODE_CVSD       0x0000
2088 #define SCO_AIRMODE_TRANSP     0x0003
2089 
2090 #define LOCAL_CODEC_ACL_MASK    BIT(0)
2091 #define LOCAL_CODEC_SCO_MASK    BIT(1)
2092 
2093 #define TRANSPORT_TYPE_MAX  0x04
2094 
2095 #endif /* __HCI_CORE_H */
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