1 /** @file
2 * @brief Bluetooth connection handling
3 */
4
5 /*
6 * Copyright (c) 2015-2016 Intel Corporation
7 *
8 * SPDX-License-Identifier: Apache-2.0
9 */
10 #ifndef ZEPHYR_INCLUDE_BLUETOOTH_CONN_H_
11 #define ZEPHYR_INCLUDE_BLUETOOTH_CONN_H_
12
13 /**
14 * @brief Connection management
15 * @defgroup bt_conn Connection management
16 * @ingroup bluetooth
17 * @{
18 */
19
20 #include <stdbool.h>
21 #include <stdint.h>
22
23 #include <zephyr/bluetooth/bluetooth.h>
24 #include <zephyr/bluetooth/hci_types.h>
25 #include <zephyr/bluetooth/addr.h>
26 #include <zephyr/bluetooth/gap.h>
27 #include <zephyr/bluetooth/direction.h>
28 #include <zephyr/sys/iterable_sections.h>
29
30 #ifdef __cplusplus
31 extern "C" {
32 #endif
33
34 /** Opaque type representing a connection to a remote device */
35 struct bt_conn;
36
37 /** Connection parameters for LE connections */
38 struct bt_le_conn_param {
39 uint16_t interval_min;
40 uint16_t interval_max;
41 uint16_t latency;
42 uint16_t timeout;
43 };
44
45 /** @brief Initialize connection parameters
46 *
47 * @param int_min Minimum Connection Interval (N * 1.25 ms)
48 * @param int_max Maximum Connection Interval (N * 1.25 ms)
49 * @param lat Connection Latency
50 * @param to Supervision Timeout (N * 10 ms)
51 */
52 #define BT_LE_CONN_PARAM_INIT(int_min, int_max, lat, to) \
53 { \
54 .interval_min = (int_min), \
55 .interval_max = (int_max), \
56 .latency = (lat), \
57 .timeout = (to), \
58 }
59
60 /** Helper to declare connection parameters inline
61 *
62 * @param int_min Minimum Connection Interval (N * 1.25 ms)
63 * @param int_max Maximum Connection Interval (N * 1.25 ms)
64 * @param lat Connection Latency
65 * @param to Supervision Timeout (N * 10 ms)
66 */
67 #define BT_LE_CONN_PARAM(int_min, int_max, lat, to) \
68 ((struct bt_le_conn_param[]) { \
69 BT_LE_CONN_PARAM_INIT(int_min, int_max, lat, to) \
70 })
71
72 /** Default LE connection parameters:
73 * Connection Interval: 30-50 ms
74 * Latency: 0
75 * Timeout: 4 s
76 */
77 #define BT_LE_CONN_PARAM_DEFAULT BT_LE_CONN_PARAM(BT_GAP_INIT_CONN_INT_MIN, \
78 BT_GAP_INIT_CONN_INT_MAX, \
79 0, 400)
80
81 /** Connection PHY information for LE connections */
82 struct bt_conn_le_phy_info {
83 uint8_t tx_phy; /** Connection transmit PHY */
84 uint8_t rx_phy; /** Connection receive PHY */
85 };
86
87 /** Connection PHY options */
88 enum {
89 /** Convenience value when no options are specified. */
90 BT_CONN_LE_PHY_OPT_NONE = 0,
91
92 /** LE Coded using S=2 coding preferred when transmitting. */
93 BT_CONN_LE_PHY_OPT_CODED_S2 = BIT(0),
94
95 /** LE Coded using S=8 coding preferred when transmitting. */
96 BT_CONN_LE_PHY_OPT_CODED_S8 = BIT(1),
97 };
98
99 /** Preferred PHY parameters for LE connections */
100 struct bt_conn_le_phy_param {
101 uint16_t options; /**< Connection PHY options. */
102 uint8_t pref_tx_phy; /**< Bitmask of preferred transmit PHYs */
103 uint8_t pref_rx_phy; /**< Bitmask of preferred receive PHYs */
104 };
105
106 /** Initialize PHY parameters
107 *
108 * @param _pref_tx_phy Bitmask of preferred transmit PHYs.
109 * @param _pref_rx_phy Bitmask of preferred receive PHYs.
110 */
111 #define BT_CONN_LE_PHY_PARAM_INIT(_pref_tx_phy, _pref_rx_phy) \
112 { \
113 .options = BT_CONN_LE_PHY_OPT_NONE, \
114 .pref_tx_phy = (_pref_tx_phy), \
115 .pref_rx_phy = (_pref_rx_phy), \
116 }
117
118 /** Helper to declare PHY parameters inline
119 *
120 * @param _pref_tx_phy Bitmask of preferred transmit PHYs.
121 * @param _pref_rx_phy Bitmask of preferred receive PHYs.
122 */
123 #define BT_CONN_LE_PHY_PARAM(_pref_tx_phy, _pref_rx_phy) \
124 ((struct bt_conn_le_phy_param []) { \
125 BT_CONN_LE_PHY_PARAM_INIT(_pref_tx_phy, _pref_rx_phy) \
126 })
127
128 /** Only LE 1M PHY */
129 #define BT_CONN_LE_PHY_PARAM_1M BT_CONN_LE_PHY_PARAM(BT_GAP_LE_PHY_1M, \
130 BT_GAP_LE_PHY_1M)
131
132 /** Only LE 2M PHY */
133 #define BT_CONN_LE_PHY_PARAM_2M BT_CONN_LE_PHY_PARAM(BT_GAP_LE_PHY_2M, \
134 BT_GAP_LE_PHY_2M)
135
136 /** Only LE Coded PHY. */
137 #define BT_CONN_LE_PHY_PARAM_CODED BT_CONN_LE_PHY_PARAM(BT_GAP_LE_PHY_CODED, \
138 BT_GAP_LE_PHY_CODED)
139
140 /** All LE PHYs. */
141 #define BT_CONN_LE_PHY_PARAM_ALL BT_CONN_LE_PHY_PARAM(BT_GAP_LE_PHY_1M | \
142 BT_GAP_LE_PHY_2M | \
143 BT_GAP_LE_PHY_CODED, \
144 BT_GAP_LE_PHY_1M | \
145 BT_GAP_LE_PHY_2M | \
146 BT_GAP_LE_PHY_CODED)
147
148 /** Connection data length information for LE connections */
149 struct bt_conn_le_data_len_info {
150 /** Maximum Link Layer transmission payload size in bytes. */
151 uint16_t tx_max_len;
152 /** Maximum Link Layer transmission payload time in us. */
153 uint16_t tx_max_time;
154 /** Maximum Link Layer reception payload size in bytes. */
155 uint16_t rx_max_len;
156 /** Maximum Link Layer reception payload time in us. */
157 uint16_t rx_max_time;
158 };
159
160 /** Connection data length parameters for LE connections */
161 struct bt_conn_le_data_len_param {
162 /** Maximum Link Layer transmission payload size in bytes. */
163 uint16_t tx_max_len;
164 /** Maximum Link Layer transmission payload time in us. */
165 uint16_t tx_max_time;
166 };
167
168 /** Initialize transmit data length parameters
169 *
170 * @param _tx_max_len Maximum Link Layer transmission payload size in bytes.
171 * @param _tx_max_time Maximum Link Layer transmission payload time in us.
172 */
173 #define BT_CONN_LE_DATA_LEN_PARAM_INIT(_tx_max_len, _tx_max_time) \
174 { \
175 .tx_max_len = (_tx_max_len), \
176 .tx_max_time = (_tx_max_time), \
177 }
178
179 /** Helper to declare transmit data length parameters inline
180 *
181 * @param _tx_max_len Maximum Link Layer transmission payload size in bytes.
182 * @param _tx_max_time Maximum Link Layer transmission payload time in us.
183 */
184 #define BT_CONN_LE_DATA_LEN_PARAM(_tx_max_len, _tx_max_time) \
185 ((struct bt_conn_le_data_len_param[]) { \
186 BT_CONN_LE_DATA_LEN_PARAM_INIT(_tx_max_len, _tx_max_time) \
187 })
188
189 /** Default LE data length parameters. */
190 #define BT_LE_DATA_LEN_PARAM_DEFAULT \
191 BT_CONN_LE_DATA_LEN_PARAM(BT_GAP_DATA_LEN_DEFAULT, \
192 BT_GAP_DATA_TIME_DEFAULT)
193
194 /** Maximum LE data length parameters. */
195 #define BT_LE_DATA_LEN_PARAM_MAX \
196 BT_CONN_LE_DATA_LEN_PARAM(BT_GAP_DATA_LEN_MAX, \
197 BT_GAP_DATA_TIME_MAX)
198
199 /** Connection Type */
200 enum __packed bt_conn_type {
201 /** LE Connection Type */
202 BT_CONN_TYPE_LE = BIT(0),
203 /** BR/EDR Connection Type */
204 BT_CONN_TYPE_BR = BIT(1),
205 /** SCO Connection Type */
206 BT_CONN_TYPE_SCO = BIT(2),
207 /** ISO Connection Type */
208 BT_CONN_TYPE_ISO = BIT(3),
209 /** All Connection Type */
210 BT_CONN_TYPE_ALL = BT_CONN_TYPE_LE | BT_CONN_TYPE_BR |
211 BT_CONN_TYPE_SCO | BT_CONN_TYPE_ISO,
212 };
213
214 /** @brief Increment a connection's reference count.
215 *
216 * Increment the reference count of a connection object.
217 *
218 * @note Will return NULL if the reference count is zero.
219 *
220 * @param conn Connection object.
221 *
222 * @return Connection object with incremented reference count, or NULL if the
223 * reference count is zero.
224 */
225 struct bt_conn *bt_conn_ref(struct bt_conn *conn);
226
227 /** @brief Decrement a connection's reference count.
228 *
229 * Decrement the reference count of a connection object.
230 *
231 * @param conn Connection object.
232 */
233 void bt_conn_unref(struct bt_conn *conn);
234
235 /** @brief Iterate through all bt_conn objects.
236 *
237 * Iterates through all bt_conn objects that are alive in the Host allocator.
238 *
239 * To find established connections, combine this with @ref bt_conn_get_info.
240 * Check that @ref bt_conn_info.state is @ref BT_CONN_STATE_CONNECTED.
241 *
242 * Thread safety: This API is thread safe, but it does not guarantee a
243 * sequentially-consistent view for objects allocated during the current
244 * invocation of this API. E.g. If preempted while allocations A then B then C
245 * happen then results may include A and C but miss B.
246 *
247 * @param type Connection Type
248 * @param func Function to call for each connection.
249 * @param data Data to pass to the callback function.
250 */
251 void bt_conn_foreach(enum bt_conn_type type,
252 void (*func)(struct bt_conn *conn, void *data),
253 void *data);
254
255 /** @brief Look up an existing connection by address.
256 *
257 * Look up an existing connection based on the remote address.
258 *
259 * The caller gets a new reference to the connection object which must be
260 * released with bt_conn_unref() once done using the object.
261 *
262 * @param id Local identity (in most cases BT_ID_DEFAULT).
263 * @param peer Remote address.
264 *
265 * @return Connection object or NULL if not found.
266 */
267 struct bt_conn *bt_conn_lookup_addr_le(uint8_t id, const bt_addr_le_t *peer);
268
269 /** @brief Get destination (peer) address of a connection.
270 *
271 * @param conn Connection object.
272 *
273 * @return Destination address.
274 */
275 const bt_addr_le_t *bt_conn_get_dst(const struct bt_conn *conn);
276
277 /** @brief Get array index of a connection
278 *
279 * This function is used to map bt_conn to index of an array of
280 * connections. The array has CONFIG_BT_MAX_CONN elements.
281 *
282 * @param conn Connection object.
283 *
284 * @return Index of the connection object.
285 * The range of the returned value is 0..CONFIG_BT_MAX_CONN-1
286 */
287 uint8_t bt_conn_index(const struct bt_conn *conn);
288
289 /** LE Connection Info Structure */
290 struct bt_conn_le_info {
291 /** Source (Local) Identity Address */
292 const bt_addr_le_t *src;
293 /** Destination (Remote) Identity Address or remote Resolvable Private
294 * Address (RPA) before identity has been resolved.
295 */
296 const bt_addr_le_t *dst;
297 /** Local device address used during connection setup. */
298 const bt_addr_le_t *local;
299 /** Remote device address used during connection setup. */
300 const bt_addr_le_t *remote;
301 uint16_t interval; /**< Connection interval */
302 uint16_t latency; /**< Connection peripheral latency */
303 uint16_t timeout; /**< Connection supervision timeout */
304
305 #if defined(CONFIG_BT_USER_PHY_UPDATE)
306 const struct bt_conn_le_phy_info *phy;
307 #endif /* defined(CONFIG_BT_USER_PHY_UPDATE) */
308
309 #if defined(CONFIG_BT_USER_DATA_LEN_UPDATE)
310 /* Connection maximum single fragment parameters */
311 const struct bt_conn_le_data_len_info *data_len;
312 #endif /* defined(CONFIG_BT_USER_DATA_LEN_UPDATE) */
313 };
314
315 /** @brief Convert connection interval to milliseconds
316 *
317 * Multiply by 1.25 to get milliseconds.
318 *
319 * Note that this may be inaccurate, as something like 7.5 ms cannot be
320 * accurately presented with integers.
321 */
322 #define BT_CONN_INTERVAL_TO_MS(interval) ((interval) * 5U / 4U)
323
324 /** @brief Convert connection interval to microseconds
325 *
326 * Multiply by 1250 to get microseconds.
327 */
328 #define BT_CONN_INTERVAL_TO_US(interval) ((interval) * 1250U)
329
330 /** BR/EDR Connection Info Structure */
331 struct bt_conn_br_info {
332 const bt_addr_t *dst; /**< Destination (Remote) BR/EDR address */
333 };
334
335 enum {
336 BT_CONN_ROLE_CENTRAL = 0,
337 BT_CONN_ROLE_PERIPHERAL = 1,
338 };
339
340 enum bt_conn_state {
341 /** Channel disconnected */
342 BT_CONN_STATE_DISCONNECTED,
343 /** Channel in connecting state */
344 BT_CONN_STATE_CONNECTING,
345 /** Channel connected and ready for upper layer traffic on it */
346 BT_CONN_STATE_CONNECTED,
347 /** Channel in disconnecting state */
348 BT_CONN_STATE_DISCONNECTING,
349 };
350
351 /** Security level. */
352 typedef enum __packed {
353 /** Level 0: Only for BR/EDR special cases, like SDP */
354 BT_SECURITY_L0,
355 /** Level 1: No encryption and no authentication. */
356 BT_SECURITY_L1,
357 /** Level 2: Encryption and no authentication (no MITM). */
358 BT_SECURITY_L2,
359 /** Level 3: Encryption and authentication (MITM). */
360 BT_SECURITY_L3,
361 /** Level 4: Authenticated Secure Connections and 128-bit key. */
362 BT_SECURITY_L4,
363 /** Bit to force new pairing procedure, bit-wise OR with requested
364 * security level.
365 */
366 BT_SECURITY_FORCE_PAIR = BIT(7),
367 } bt_security_t;
368
369 /** Security Info Flags. */
370 enum bt_security_flag {
371 /** Paired with Secure Connections. */
372 BT_SECURITY_FLAG_SC = BIT(0),
373 /** Paired with Out of Band method. */
374 BT_SECURITY_FLAG_OOB = BIT(1),
375 };
376
377 /** Security Info Structure. */
378 struct bt_security_info {
379 /** Security Level. */
380 bt_security_t level;
381 /** Encryption Key Size. */
382 uint8_t enc_key_size;
383 /** Flags. */
384 enum bt_security_flag flags;
385 };
386
387 /** Connection Info Structure */
388 struct bt_conn_info {
389 /** Connection Type. */
390 enum bt_conn_type type;
391 /** Connection Role. */
392 uint8_t role;
393 /** Which local identity the connection was created with */
394 uint8_t id;
395 /** Connection Type specific Info.*/
396 union {
397 /** LE Connection specific Info. */
398 struct bt_conn_le_info le;
399 /** BR/EDR Connection specific Info. */
400 struct bt_conn_br_info br;
401 };
402 /** Connection state. */
403 enum bt_conn_state state;
404 /** Security specific info. */
405 struct bt_security_info security;
406 };
407
408 /** LE Connection Remote Info Structure */
409 struct bt_conn_le_remote_info {
410
411 /** Remote LE feature set (bitmask). */
412 const uint8_t *features;
413 };
414
415 /** BR/EDR Connection Remote Info structure */
416 struct bt_conn_br_remote_info {
417
418 /** Remote feature set (pages of bitmasks). */
419 const uint8_t *features;
420
421 /** Number of pages in the remote feature set. */
422 uint8_t num_pages;
423 };
424
425 /** @brief Connection Remote Info Structure
426 *
427 * @note The version, manufacturer and subversion fields will only contain
428 * valid data if @kconfig{CONFIG_BT_REMOTE_VERSION} is enabled.
429 */
430 struct bt_conn_remote_info {
431 /** Connection Type */
432 uint8_t type;
433
434 /** Remote Link Layer version */
435 uint8_t version;
436
437 /** Remote manufacturer identifier */
438 uint16_t manufacturer;
439
440 /** Per-manufacturer unique revision */
441 uint16_t subversion;
442
443 union {
444 /** LE connection remote info */
445 struct bt_conn_le_remote_info le;
446
447 /** BR/EDR connection remote info */
448 struct bt_conn_br_remote_info br;
449 };
450 };
451
452 enum bt_conn_le_tx_power_phy {
453 /** Convenience macro for when no PHY is set. */
454 BT_CONN_LE_TX_POWER_PHY_NONE,
455 /** LE 1M PHY */
456 BT_CONN_LE_TX_POWER_PHY_1M,
457 /** LE 2M PHY */
458 BT_CONN_LE_TX_POWER_PHY_2M,
459 /** LE Coded PHY using S=8 coding. */
460 BT_CONN_LE_TX_POWER_PHY_CODED_S8,
461 /** LE Coded PHY using S=2 coding. */
462 BT_CONN_LE_TX_POWER_PHY_CODED_S2,
463 };
464
465 /** LE Transmit Power Level Structure */
466 struct bt_conn_le_tx_power {
467
468 /** Input: 1M, 2M, Coded S2 or Coded S8 */
469 uint8_t phy;
470
471 /** Output: current transmit power level */
472 int8_t current_level;
473
474 /** Output: maximum transmit power level */
475 int8_t max_level;
476 };
477
478
479 /** LE Transmit Power Reporting Structure */
480 struct bt_conn_le_tx_power_report {
481
482 /** Reason for Transmit power reporting,
483 * as documented in Core Spec. Version 5.4 Vol. 4, Part E, 7.7.65.33.
484 */
485 uint8_t reason;
486
487 /** Phy of Transmit power reporting. */
488 enum bt_conn_le_tx_power_phy phy;
489
490 /** Transmit power level
491 * - 0xXX - Transmit power level
492 * + Range: -127 to 20
493 * + Units: dBm
494 *
495 * - 0x7E - Remote device is not managing power levels on this PHY.
496 * - 0x7F - Transmit power level is not available
497 */
498 int8_t tx_power_level;
499
500 /** Bit 0: Transmit power level is at minimum level.
501 * Bit 1: Transmit power level is at maximum level.
502 */
503 uint8_t tx_power_level_flag;
504
505 /** Change in transmit power level
506 * - 0xXX - Change in transmit power level (positive indicates increased
507 * power, negative indicates decreased power, zero indicates unchanged)
508 * Units: dB
509 * - 0x7F - Change is not available or is out of range.
510 */
511 int8_t delta;
512 };
513
514 /** @brief Path Loss zone that has been entered.
515 *
516 * The path loss zone that has been entered in the most recent LE Path Loss Monitoring
517 * Threshold Change event as documented in Core Spec. Version 5.4 Vol.4, Part E, 7.7.65.32.
518 *
519 * @note BT_CONN_LE_PATH_LOSS_ZONE_UNAVAILABLE has been added to notify when path loss becomes
520 * unavailable.
521 */
522 enum bt_conn_le_path_loss_zone {
523 /** Low path loss zone entered. */
524 BT_CONN_LE_PATH_LOSS_ZONE_ENTERED_LOW,
525 /** Middle path loss zone entered. */
526 BT_CONN_LE_PATH_LOSS_ZONE_ENTERED_MIDDLE,
527 /** High path loss zone entered. */
528 BT_CONN_LE_PATH_LOSS_ZONE_ENTERED_HIGH,
529 /** Path loss has become unavailable. */
530 BT_CONN_LE_PATH_LOSS_ZONE_UNAVAILABLE,
531 };
532
533 BUILD_ASSERT(BT_CONN_LE_PATH_LOSS_ZONE_ENTERED_LOW == BT_HCI_LE_ZONE_ENTERED_LOW);
534 BUILD_ASSERT(BT_CONN_LE_PATH_LOSS_ZONE_ENTERED_MIDDLE == BT_HCI_LE_ZONE_ENTERED_MIDDLE);
535 BUILD_ASSERT(BT_CONN_LE_PATH_LOSS_ZONE_ENTERED_HIGH == BT_HCI_LE_ZONE_ENTERED_HIGH);
536
537 /** @brief LE Path Loss Monitoring Threshold Change Report Structure. */
538 struct bt_conn_le_path_loss_threshold_report {
539
540 /** Path Loss zone as documented in Core Spec. Version 5.4 Vol.4, Part E, 7.7.65.32. */
541 enum bt_conn_le_path_loss_zone zone;
542
543 /** Current path loss (dB). */
544 uint8_t path_loss;
545 };
546
547 /** @brief LE Path Loss Monitoring Parameters Structure as defined in Core Spec. Version 5.4
548 * Vol.4, Part E, 7.8.119 LE Set Path Loss Reporting Parameters command.
549 */
550 struct bt_conn_le_path_loss_reporting_param {
551 /** High threshold for the path loss (dB). */
552 uint8_t high_threshold;
553 /** Hysteresis value for the high threshold (dB). */
554 uint8_t high_hysteresis;
555 /** Low threshold for the path loss (dB). */
556 uint8_t low_threshold;
557 /** Hysteresis value for the low threshold (dB). */
558 uint8_t low_hysteresis;
559 /** Minimum time in number of connection events to be observed once the
560 * path loss crosses the threshold before an event is generated.
561 */
562 uint16_t min_time_spent;
563 };
564
565 /** @brief Passkey Keypress Notification type
566 *
567 * The numeric values are the same as in the Core specification for Pairing
568 * Keypress Notification PDU.
569 */
570 enum bt_conn_auth_keypress {
571 BT_CONN_AUTH_KEYPRESS_ENTRY_STARTED = 0x00,
572 BT_CONN_AUTH_KEYPRESS_DIGIT_ENTERED = 0x01,
573 BT_CONN_AUTH_KEYPRESS_DIGIT_ERASED = 0x02,
574 BT_CONN_AUTH_KEYPRESS_CLEARED = 0x03,
575 BT_CONN_AUTH_KEYPRESS_ENTRY_COMPLETED = 0x04,
576 };
577
578 /** @brief Get connection info
579 *
580 * @param conn Connection object.
581 * @param info Connection info object.
582 *
583 * @return Zero on success or (negative) error code on failure.
584 */
585 int bt_conn_get_info(const struct bt_conn *conn, struct bt_conn_info *info);
586
587 /** @brief Get connection info for the remote device.
588 *
589 * @param conn Connection object.
590 * @param remote_info Connection remote info object.
591 *
592 * @note In order to retrieve the remote version (version, manufacturer
593 * and subversion) @kconfig{CONFIG_BT_REMOTE_VERSION} must be enabled
594 *
595 * @note The remote information is exchanged directly after the connection has
596 * been established. The application can be notified about when the remote
597 * information is available through the remote_info_available callback.
598 *
599 * @return Zero on success or (negative) error code on failure.
600 * @return -EBUSY The remote information is not yet available.
601 */
602 int bt_conn_get_remote_info(struct bt_conn *conn,
603 struct bt_conn_remote_info *remote_info);
604
605 /** @brief Get connection transmit power level.
606 *
607 * @param conn Connection object.
608 * @param tx_power_level Transmit power level descriptor.
609 *
610 * @return Zero on success or (negative) error code on failure.
611 * @return -ENOBUFS HCI command buffer is not available.
612 */
613 int bt_conn_le_get_tx_power_level(struct bt_conn *conn,
614 struct bt_conn_le_tx_power *tx_power_level);
615
616 /** @brief Get local enhanced connection transmit power level.
617 *
618 * @param conn Connection object.
619 * @param tx_power Transmit power level descriptor.
620 *
621 * @return Zero on success or (negative) error code on failure.
622 * @retval -ENOBUFS HCI command buffer is not available.
623 */
624 int bt_conn_le_enhanced_get_tx_power_level(struct bt_conn *conn,
625 struct bt_conn_le_tx_power *tx_power);
626
627 /** @brief Get remote (peer) transmit power level.
628 *
629 * @param conn Connection object.
630 * @param phy PHY information.
631 *
632 * @return Zero on success or (negative) error code on failure.
633 * @retval -ENOBUFS HCI command buffer is not available.
634 */
635 int bt_conn_le_get_remote_tx_power_level(struct bt_conn *conn,
636 enum bt_conn_le_tx_power_phy phy);
637
638 /** @brief Enable transmit power reporting.
639 *
640 * @param conn Connection object.
641 * @param local_enable Enable/disable reporting for local.
642 * @param remote_enable Enable/disable reporting for remote.
643 *
644 * @return Zero on success or (negative) error code on failure.
645 * @retval -ENOBUFS HCI command buffer is not available.
646 */
647 int bt_conn_le_set_tx_power_report_enable(struct bt_conn *conn,
648 bool local_enable,
649 bool remote_enable);
650
651 /** @brief Set Path Loss Monitoring Parameters.
652 *
653 * Change the configuration for path loss threshold change events for a given conn handle.
654 *
655 * @note To use this API @kconfig{CONFIG_BT_PATH_LOSS_MONITORING} must be set.
656 *
657 * @param conn Connection object.
658 * @param param Path Loss Monitoring parameters
659 *
660 * @return Zero on success or (negative) error code on failure.
661 */
662 int bt_conn_le_set_path_loss_mon_param(struct bt_conn *conn,
663 const struct bt_conn_le_path_loss_reporting_param *param);
664
665 /** @brief Enable or Disable Path Loss Monitoring.
666 *
667 * Enable or disable Path Loss Monitoring, which will decide whether Path Loss Threshold events
668 * are sent from the controller to the host.
669 *
670 * @note To use this API @kconfig{CONFIG_BT_PATH_LOSS_MONITORING} must be set.
671 *
672 * @param conn Connection Object.
673 * @param enable Enable/disable path loss reporting.
674 *
675 * @return Zero on success or (negative) error code on failure.
676 */
677 int bt_conn_le_set_path_loss_mon_enable(struct bt_conn *conn, bool enable);
678
679 /** @brief Update the connection parameters.
680 *
681 * If the local device is in the peripheral role then updating the connection
682 * parameters will be delayed. This delay can be configured by through the
683 * @kconfig{CONFIG_BT_CONN_PARAM_UPDATE_TIMEOUT} option.
684 *
685 * @param conn Connection object.
686 * @param param Updated connection parameters.
687 *
688 * @return Zero on success or (negative) error code on failure.
689 */
690 int bt_conn_le_param_update(struct bt_conn *conn,
691 const struct bt_le_conn_param *param);
692
693 /** @brief Update the connection transmit data length parameters.
694 *
695 * @param conn Connection object.
696 * @param param Updated data length parameters.
697 *
698 * @return Zero on success or (negative) error code on failure.
699 */
700 int bt_conn_le_data_len_update(struct bt_conn *conn,
701 const struct bt_conn_le_data_len_param *param);
702
703 /** @brief Update the connection PHY parameters.
704 *
705 * Update the preferred transmit and receive PHYs of the connection.
706 * Use @ref BT_GAP_LE_PHY_NONE to indicate no preference.
707 *
708 * @param conn Connection object.
709 * @param param Updated connection parameters.
710 *
711 * @return Zero on success or (negative) error code on failure.
712 */
713 int bt_conn_le_phy_update(struct bt_conn *conn,
714 const struct bt_conn_le_phy_param *param);
715
716 /** @brief Disconnect from a remote device or cancel pending connection.
717 *
718 * Disconnect an active connection with the specified reason code or cancel
719 * pending outgoing connection.
720 *
721 * The disconnect reason for a normal disconnect should be:
722 * @ref BT_HCI_ERR_REMOTE_USER_TERM_CONN.
723 *
724 * The following disconnect reasons are accepted:
725 * - @ref BT_HCI_ERR_AUTH_FAIL
726 * - @ref BT_HCI_ERR_REMOTE_USER_TERM_CONN
727 * - @ref BT_HCI_ERR_REMOTE_LOW_RESOURCES
728 * - @ref BT_HCI_ERR_REMOTE_POWER_OFF
729 * - @ref BT_HCI_ERR_UNSUPP_REMOTE_FEATURE
730 * - @ref BT_HCI_ERR_PAIRING_NOT_SUPPORTED
731 * - @ref BT_HCI_ERR_UNACCEPT_CONN_PARAM
732 *
733 * @param conn Connection to disconnect.
734 * @param reason Reason code for the disconnection.
735 *
736 * @return Zero on success or (negative) error code on failure.
737 */
738 int bt_conn_disconnect(struct bt_conn *conn, uint8_t reason);
739
740 enum {
741 /** Convenience value when no options are specified. */
742 BT_CONN_LE_OPT_NONE = 0,
743
744 /** @brief Enable LE Coded PHY.
745 *
746 * Enable scanning on the LE Coded PHY.
747 */
748 BT_CONN_LE_OPT_CODED = BIT(0),
749
750 /** @brief Disable LE 1M PHY.
751 *
752 * Disable scanning on the LE 1M PHY.
753 *
754 * @note Requires @ref BT_CONN_LE_OPT_CODED.
755 */
756 BT_CONN_LE_OPT_NO_1M = BIT(1),
757 };
758
759 struct bt_conn_le_create_param {
760
761 /** Bit-field of create connection options. */
762 uint32_t options;
763
764 /** Scan interval (N * 0.625 ms) */
765 uint16_t interval;
766
767 /** Scan window (N * 0.625 ms) */
768 uint16_t window;
769
770 /** @brief Scan interval LE Coded PHY (N * 0.625 MS)
771 *
772 * Set zero to use same as LE 1M PHY scan interval
773 */
774 uint16_t interval_coded;
775
776 /** @brief Scan window LE Coded PHY (N * 0.625 MS)
777 *
778 * Set zero to use same as LE 1M PHY scan window.
779 */
780 uint16_t window_coded;
781
782 /** @brief Connection initiation timeout (N * 10 MS)
783 *
784 * Set zero to use the default @kconfig{CONFIG_BT_CREATE_CONN_TIMEOUT}
785 * timeout.
786 *
787 * @note Unused in @ref bt_conn_le_create_auto
788 */
789 uint16_t timeout;
790 };
791
792 /** @brief Initialize create connection parameters
793 *
794 * @param _options Create connection options.
795 * @param _interval Create connection scan interval (N * 0.625 ms).
796 * @param _window Create connection scan window (N * 0.625 ms).
797 */
798 #define BT_CONN_LE_CREATE_PARAM_INIT(_options, _interval, _window) \
799 { \
800 .options = (_options), \
801 .interval = (_interval), \
802 .window = (_window), \
803 .interval_coded = 0, \
804 .window_coded = 0, \
805 .timeout = 0, \
806 }
807
808 /** Helper to declare create connection parameters inline
809 *
810 * @param _options Create connection options.
811 * @param _interval Create connection scan interval (N * 0.625 ms).
812 * @param _window Create connection scan window (N * 0.625 ms).
813 */
814 #define BT_CONN_LE_CREATE_PARAM(_options, _interval, _window) \
815 ((struct bt_conn_le_create_param[]) { \
816 BT_CONN_LE_CREATE_PARAM_INIT(_options, _interval, _window) \
817 })
818
819 /** Default LE create connection parameters.
820 * Scan continuously by setting scan interval equal to scan window.
821 */
822 #define BT_CONN_LE_CREATE_CONN \
823 BT_CONN_LE_CREATE_PARAM(BT_CONN_LE_OPT_NONE, \
824 BT_GAP_SCAN_FAST_INTERVAL, \
825 BT_GAP_SCAN_FAST_INTERVAL)
826
827 /** Default LE create connection using filter accept list parameters.
828 * Scan window: 30 ms.
829 * Scan interval: 60 ms.
830 */
831 #define BT_CONN_LE_CREATE_CONN_AUTO \
832 BT_CONN_LE_CREATE_PARAM(BT_CONN_LE_OPT_NONE, \
833 BT_GAP_SCAN_FAST_INTERVAL, \
834 BT_GAP_SCAN_FAST_WINDOW)
835
836 /** @brief Initiate an LE connection to a remote device.
837 *
838 * Allows initiate new LE link to remote peer using its address.
839 *
840 * The caller gets a new reference to the connection object which must be
841 * released with bt_conn_unref() once done using the object.
842 *
843 * This uses the General Connection Establishment procedure.
844 *
845 * The application must disable explicit scanning before initiating
846 * a new LE connection if @kconfig{CONFIG_BT_SCAN_AND_INITIATE_IN_PARALLEL}
847 * is not enabled.
848 *
849 * @param[in] peer Remote address.
850 * @param[in] create_param Create connection parameters.
851 * @param[in] conn_param Initial connection parameters.
852 * @param[out] conn Valid connection object on success.
853 *
854 * @return Zero on success or (negative) error code on failure.
855 */
856 int bt_conn_le_create(const bt_addr_le_t *peer,
857 const struct bt_conn_le_create_param *create_param,
858 const struct bt_le_conn_param *conn_param,
859 struct bt_conn **conn);
860
861 struct bt_conn_le_create_synced_param {
862
863 /** @brief Remote address
864 *
865 * The peer must be synchronized to the PAwR train.
866 *
867 */
868 const bt_addr_le_t *peer;
869
870 /** The subevent where the connection will be initiated. */
871 uint8_t subevent;
872 };
873
874 /** @brief Create a connection to a synced device
875 *
876 * Initiate a connection to a synced device from a Periodic Advertising
877 * with Responses (PAwR) train.
878 *
879 * The caller gets a new reference to the connection object which must be
880 * released with bt_conn_unref() once done using the object.
881 *
882 * This uses the Periodic Advertising Connection Procedure.
883 *
884 * @param[in] adv The adverting set the PAwR advertiser belongs to.
885 * @param[in] synced_param Create connection parameters.
886 * @param[in] conn_param Initial connection parameters.
887 * @param[out] conn Valid connection object on success.
888 *
889 * @return Zero on success or (negative) error code on failure.
890 */
891 int bt_conn_le_create_synced(const struct bt_le_ext_adv *adv,
892 const struct bt_conn_le_create_synced_param *synced_param,
893 const struct bt_le_conn_param *conn_param, struct bt_conn **conn);
894
895 /** @brief Automatically connect to remote devices in the filter accept list.
896 *
897 * This uses the Auto Connection Establishment procedure.
898 * The procedure will continue until a single connection is established or the
899 * procedure is stopped through @ref bt_conn_create_auto_stop.
900 * To establish connections to all devices in the filter accept list the
901 * procedure should be started again in the connected callback after a
902 * new connection has been established.
903 *
904 * @param create_param Create connection parameters
905 * @param conn_param Initial connection parameters.
906 *
907 * @return Zero on success or (negative) error code on failure.
908 * @return -ENOMEM No free connection object available.
909 */
910 int bt_conn_le_create_auto(const struct bt_conn_le_create_param *create_param,
911 const struct bt_le_conn_param *conn_param);
912
913 /** @brief Stop automatic connect creation.
914 *
915 * @return Zero on success or (negative) error code on failure.
916 */
917 int bt_conn_create_auto_stop(void);
918
919 /** @brief Automatically connect to remote device if it's in range.
920 *
921 * This function enables/disables automatic connection initiation.
922 * Every time the device loses the connection with peer, this connection
923 * will be re-established if connectable advertisement from peer is received.
924 *
925 * @note Auto connect is disabled during explicit scanning.
926 *
927 * @param addr Remote Bluetooth address.
928 * @param param If non-NULL, auto connect is enabled with the given
929 * parameters. If NULL, auto connect is disabled.
930 *
931 * @return Zero on success or error code otherwise.
932 */
933 int bt_le_set_auto_conn(const bt_addr_le_t *addr,
934 const struct bt_le_conn_param *param);
935
936 /** @brief Set security level for a connection.
937 *
938 * This function enable security (encryption) for a connection. If the device
939 * has bond information for the peer with sufficiently strong key encryption
940 * will be enabled. If the connection is already encrypted with sufficiently
941 * strong key this function does nothing.
942 *
943 * If the device has no bond information for the peer and is not already paired
944 * then the pairing procedure will be initiated. Note that @p sec has no effect
945 * on the security level selected for the pairing process. The selection is
946 * instead controlled by the values of the registered @ref bt_conn_auth_cb. If
947 * the device has bond information or is already paired and the keys are too
948 * weak then the pairing procedure will be initiated.
949 *
950 * This function may return an error if the required level of security defined using
951 * @p sec is not possible to achieve due to local or remote device limitation
952 * (e.g., input output capabilities), or if the maximum number of paired devices
953 * has been reached.
954 *
955 * This function may return an error if the pairing procedure has already been
956 * initiated by the local device or the peer device.
957 *
958 * @note When @kconfig{CONFIG_BT_SMP_SC_ONLY} is enabled then the security
959 * level will always be level 4.
960 *
961 * @note When @kconfig{CONFIG_BT_SMP_OOB_LEGACY_PAIR_ONLY} is enabled then the
962 * security level will always be level 3.
963 *
964 * @note When @ref BT_SECURITY_FORCE_PAIR within @p sec is enabled then the pairing
965 * procedure will always be initiated.
966 *
967 * @param conn Connection object.
968 * @param sec Requested minimum security level.
969 *
970 * @return 0 on success or negative error
971 */
972 int bt_conn_set_security(struct bt_conn *conn, bt_security_t sec);
973
974 /** @brief Get security level for a connection.
975 *
976 * @return Connection security level
977 */
978 bt_security_t bt_conn_get_security(const struct bt_conn *conn);
979
980 /** @brief Get encryption key size.
981 *
982 * This function gets encryption key size.
983 * If there is no security (encryption) enabled 0 will be returned.
984 *
985 * @param conn Existing connection object.
986 *
987 * @return Encryption key size.
988 */
989 uint8_t bt_conn_enc_key_size(const struct bt_conn *conn);
990
991 enum bt_security_err {
992 /** Security procedure successful. */
993 BT_SECURITY_ERR_SUCCESS,
994
995 /** Authentication failed. */
996 BT_SECURITY_ERR_AUTH_FAIL,
997
998 /** PIN or encryption key is missing. */
999 BT_SECURITY_ERR_PIN_OR_KEY_MISSING,
1000
1001 /** OOB data is not available. */
1002 BT_SECURITY_ERR_OOB_NOT_AVAILABLE,
1003
1004 /** The requested security level could not be reached. */
1005 BT_SECURITY_ERR_AUTH_REQUIREMENT,
1006
1007 /** Pairing is not supported */
1008 BT_SECURITY_ERR_PAIR_NOT_SUPPORTED,
1009
1010 /** Pairing is not allowed. */
1011 BT_SECURITY_ERR_PAIR_NOT_ALLOWED,
1012
1013 /** Invalid parameters. */
1014 BT_SECURITY_ERR_INVALID_PARAM,
1015
1016 /** Distributed Key Rejected */
1017 BT_SECURITY_ERR_KEY_REJECTED,
1018
1019 /** Pairing failed but the exact reason could not be specified. */
1020 BT_SECURITY_ERR_UNSPECIFIED,
1021 };
1022
1023 /** @brief Connection callback structure.
1024 *
1025 * This structure is used for tracking the state of a connection.
1026 * It is registered with the help of the bt_conn_cb_register() API.
1027 * It's permissible to register multiple instances of this @ref bt_conn_cb
1028 * type, in case different modules of an application are interested in
1029 * tracking the connection state. If a callback is not of interest for
1030 * an instance, it may be set to NULL and will as a consequence not be
1031 * used for that instance.
1032 */
1033 struct bt_conn_cb {
1034 /** @brief A new connection has been established.
1035 *
1036 * This callback notifies the application of a new connection.
1037 * In case the err parameter is non-zero it means that the
1038 * connection establishment failed.
1039 *
1040 * @note If the connection was established from an advertising set then
1041 * the advertising set cannot be restarted directly from this
1042 * callback. Instead use the connected callback of the
1043 * advertising set.
1044 *
1045 * @param conn New connection object.
1046 * @param err HCI error. Zero for success, non-zero otherwise.
1047 *
1048 * @p err can mean either of the following:
1049 * - @ref BT_HCI_ERR_UNKNOWN_CONN_ID Creating the connection started by
1050 * @ref bt_conn_le_create was canceled either by the user through
1051 * @ref bt_conn_disconnect or by the timeout in the host through
1052 * @ref bt_conn_le_create_param timeout parameter, which defaults to
1053 * @kconfig{CONFIG_BT_CREATE_CONN_TIMEOUT} seconds.
1054 * - @p BT_HCI_ERR_ADV_TIMEOUT High duty cycle directed connectable
1055 * advertiser started by @ref bt_le_adv_start failed to be connected
1056 * within the timeout.
1057 */
1058 void (*connected)(struct bt_conn *conn, uint8_t err);
1059
1060 /** @brief A connection has been disconnected.
1061 *
1062 * This callback notifies the application that a connection
1063 * has been disconnected.
1064 *
1065 * When this callback is called the stack still has one reference to
1066 * the connection object. If the application in this callback tries to
1067 * start either a connectable advertiser or create a new connection
1068 * this might fail because there are no free connection objects
1069 * available.
1070 * To avoid this issue it is recommended to either start connectable
1071 * advertise or create a new connection using @ref k_work_submit or
1072 * increase @kconfig{CONFIG_BT_MAX_CONN}.
1073 *
1074 * @param conn Connection object.
1075 * @param reason BT_HCI_ERR_* reason for the disconnection.
1076 */
1077 void (*disconnected)(struct bt_conn *conn, uint8_t reason);
1078
1079 /** @brief A connection object has been returned to the pool.
1080 *
1081 * This callback notifies the application that it might be able to
1082 * allocate a connection object. No guarantee, first come, first serve.
1083 *
1084 * Use this to e.g. re-start connectable advertising or scanning.
1085 *
1086 * Treat this callback as an ISR, as it originates from
1087 * @ref bt_conn_unref which is used by the BT stack. Making
1088 * Bluetooth API calls in this context is error-prone and strongly
1089 * discouraged.
1090 */
1091 void (*recycled)(void);
1092
1093 /** @brief LE connection parameter update request.
1094 *
1095 * This callback notifies the application that a remote device
1096 * is requesting to update the connection parameters. The
1097 * application accepts the parameters by returning true, or
1098 * rejects them by returning false. Before accepting, the
1099 * application may also adjust the parameters to better suit
1100 * its needs.
1101 *
1102 * It is recommended for an application to have just one of these
1103 * callbacks for simplicity. However, if an application registers
1104 * multiple it needs to manage the potentially different
1105 * requirements for each callback. Each callback gets the
1106 * parameters as returned by previous callbacks, i.e. they are not
1107 * necessarily the same ones as the remote originally sent.
1108 *
1109 * If the application does not have this callback then the default
1110 * is to accept the parameters.
1111 *
1112 * @param conn Connection object.
1113 * @param param Proposed connection parameters.
1114 *
1115 * @return true to accept the parameters, or false to reject them.
1116 */
1117 bool (*le_param_req)(struct bt_conn *conn,
1118 struct bt_le_conn_param *param);
1119
1120 /** @brief The parameters for an LE connection have been updated.
1121 *
1122 * This callback notifies the application that the connection
1123 * parameters for an LE connection have been updated.
1124 *
1125 * @param conn Connection object.
1126 * @param interval Connection interval.
1127 * @param latency Connection latency.
1128 * @param timeout Connection supervision timeout.
1129 */
1130 void (*le_param_updated)(struct bt_conn *conn, uint16_t interval,
1131 uint16_t latency, uint16_t timeout);
1132 #if defined(CONFIG_BT_SMP)
1133 /** @brief Remote Identity Address has been resolved.
1134 *
1135 * This callback notifies the application that a remote
1136 * Identity Address has been resolved
1137 *
1138 * @param conn Connection object.
1139 * @param rpa Resolvable Private Address.
1140 * @param identity Identity Address.
1141 */
1142 void (*identity_resolved)(struct bt_conn *conn,
1143 const bt_addr_le_t *rpa,
1144 const bt_addr_le_t *identity);
1145 #endif /* CONFIG_BT_SMP */
1146 #if defined(CONFIG_BT_SMP) || defined(CONFIG_BT_CLASSIC)
1147 /** @brief The security level of a connection has changed.
1148 *
1149 * This callback notifies the application that the security of a
1150 * connection has changed.
1151 *
1152 * The security level of the connection can either have been increased
1153 * or remain unchanged. An increased security level means that the
1154 * pairing procedure has been performed or the bond information from
1155 * a previous connection has been applied. If the security level
1156 * remains unchanged this means that the encryption key has been
1157 * refreshed for the connection.
1158 *
1159 * @param conn Connection object.
1160 * @param level New security level of the connection.
1161 * @param err Security error. Zero for success, non-zero otherwise.
1162 */
1163 void (*security_changed)(struct bt_conn *conn, bt_security_t level,
1164 enum bt_security_err err);
1165 #endif /* defined(CONFIG_BT_SMP) || defined(CONFIG_BT_CLASSIC) */
1166
1167 #if defined(CONFIG_BT_REMOTE_INFO)
1168 /** @brief Remote information procedures has completed.
1169 *
1170 * This callback notifies the application that the remote information
1171 * has been retrieved from the remote peer.
1172 *
1173 * @param conn Connection object.
1174 * @param remote_info Connection information of remote device.
1175 */
1176 void (*remote_info_available)(struct bt_conn *conn,
1177 struct bt_conn_remote_info *remote_info);
1178 #endif /* defined(CONFIG_BT_REMOTE_INFO) */
1179
1180 #if defined(CONFIG_BT_USER_PHY_UPDATE)
1181 /** @brief The PHY of the connection has changed.
1182 *
1183 * This callback notifies the application that the PHY of the
1184 * connection has changed.
1185 *
1186 * @param conn Connection object.
1187 * @param info Connection LE PHY information.
1188 */
1189 void (*le_phy_updated)(struct bt_conn *conn,
1190 struct bt_conn_le_phy_info *param);
1191 #endif /* defined(CONFIG_BT_USER_PHY_UPDATE) */
1192
1193 #if defined(CONFIG_BT_USER_DATA_LEN_UPDATE)
1194 /** @brief The data length parameters of the connection has changed.
1195 *
1196 * This callback notifies the application that the maximum Link Layer
1197 * payload length or transmission time has changed.
1198 *
1199 * @param conn Connection object.
1200 * @param info Connection data length information.
1201 */
1202 void (*le_data_len_updated)(struct bt_conn *conn,
1203 struct bt_conn_le_data_len_info *info);
1204 #endif /* defined(CONFIG_BT_USER_DATA_LEN_UPDATE) */
1205
1206 #if defined(CONFIG_BT_DF_CONNECTION_CTE_RX)
1207 /** @brief Callback for IQ samples report collected when sampling
1208 * CTE received by data channel PDU.
1209 *
1210 * @param conn The connection object.
1211 * @param iq_report Report data for collected IQ samples.
1212 */
1213 void (*cte_report_cb)(struct bt_conn *conn,
1214 const struct bt_df_conn_iq_samples_report *iq_report);
1215 #endif /* CONFIG_BT_DF_CONNECTION_CTE_RX */
1216
1217 #if defined(CONFIG_BT_TRANSMIT_POWER_CONTROL)
1218 /** @brief LE Read Remote Transmit Power Level procedure has completed or LE
1219 * Transmit Power Reporting event.
1220 *
1221 * This callback notifies the application that either the remote transmit power level
1222 * has been read from the peer or transmit power level has changed for the local or
1223 * remote controller when transmit power reporting is enabled for the respective side
1224 * using @ref bt_conn_le_set_tx_power_report_enable.
1225 *
1226 * @param conn Connection object.
1227 * @param report Transmit power report.
1228 */
1229 void (*tx_power_report)(struct bt_conn *conn,
1230 const struct bt_conn_le_tx_power_report *report);
1231 #endif /* CONFIG_BT_TRANSMIT_POWER_CONTROL */
1232
1233 #if defined(CONFIG_BT_PATH_LOSS_MONITORING)
1234 /** @brief LE Path Loss Threshold event.
1235 *
1236 * This callback notifies the application that there has been a path loss threshold
1237 * crossing or reporting the initial path loss threshold zone after using
1238 * @ref bt_conn_le_set_path_loss_mon_enable.
1239 *
1240 * @param conn Connection object.
1241 * @param report Path loss threshold report.
1242 */
1243 void (*path_loss_threshold_report)(struct bt_conn *conn,
1244 const struct bt_conn_le_path_loss_threshold_report *report);
1245 #endif /* CONFIG_BT_PATH_LOSS_MONITORING */
1246
1247 /** @internal Internally used field for list handling */
1248 sys_snode_t _node;
1249 };
1250
1251 /** @brief Register connection callbacks.
1252 *
1253 * Register callbacks to monitor the state of connections.
1254 *
1255 * @param cb Callback struct. Must point to memory that remains valid.
1256 *
1257 * @retval 0 Success.
1258 * @retval -EEXIST if @p cb was already registered.
1259 */
1260 int bt_conn_cb_register(struct bt_conn_cb *cb);
1261
1262 /**
1263 * @brief Unregister connection callbacks.
1264 *
1265 * Unregister the state of connections callbacks.
1266 *
1267 * @param cb Callback struct point to memory that remains valid.
1268 *
1269 * @retval 0 Success
1270 * @retval -EINVAL If @p cb is NULL
1271 * @retval -ENOENT if @p cb was not registered
1272 */
1273 int bt_conn_cb_unregister(struct bt_conn_cb *cb);
1274
1275 /**
1276 * @brief Register a callback structure for connection events.
1277 *
1278 * @param _name Name of callback structure.
1279 */
1280 #define BT_CONN_CB_DEFINE(_name) \
1281 static const STRUCT_SECTION_ITERABLE(bt_conn_cb, \
1282 _CONCAT(bt_conn_cb_, \
1283 _name))
1284
1285 /** Converts a security error to string.
1286 *
1287 * @return The string representation of the security error code.
1288 * If @kconfig{CONFIG_BT_SECURITY_ERR_TO_STR} is not enabled,
1289 * this just returns the empty string
1290 */
1291 #if defined(CONFIG_BT_SECURITY_ERR_TO_STR)
1292 const char *bt_security_err_to_str(enum bt_security_err err);
1293 #else
bt_security_err_to_str(enum bt_security_err err)1294 static inline const char *bt_security_err_to_str(enum bt_security_err err)
1295 {
1296 ARG_UNUSED(err);
1297
1298 return "";
1299 }
1300 #endif
1301
1302 /** @brief Enable/disable bonding.
1303 *
1304 * Set/clear the Bonding flag in the Authentication Requirements of
1305 * SMP Pairing Request/Response data.
1306 * The initial value of this flag depends on BT_BONDABLE Kconfig setting.
1307 * For the vast majority of applications calling this function shouldn't be
1308 * needed.
1309 *
1310 * @param enable Value allowing/disallowing to be bondable.
1311 */
1312 void bt_set_bondable(bool enable);
1313
1314 /** @brief Set/clear the bonding flag for a given connection.
1315 *
1316 * Set/clear the Bonding flag in the Authentication Requirements of
1317 * SMP Pairing Request/Response data for a given connection.
1318 *
1319 * The bonding flag for a given connection cannot be set/cleared if
1320 * security procedures in the SMP module have already started.
1321 * This function can be called only once per connection.
1322 *
1323 * If the bonding flag is not set/cleared for a given connection,
1324 * the value will depend on global configuration which is set using
1325 * bt_set_bondable.
1326 * The default value of the global configuration is defined using
1327 * CONFIG_BT_BONDABLE Kconfig option.
1328 *
1329 * @param conn Connection object.
1330 * @param enable Value allowing/disallowing to be bondable.
1331 */
1332 int bt_conn_set_bondable(struct bt_conn *conn, bool enable);
1333
1334 /** @brief Allow/disallow remote LE SC OOB data to be used for pairing.
1335 *
1336 * Set/clear the OOB data flag for LE SC SMP Pairing Request/Response data.
1337 *
1338 * @param enable Value allowing/disallowing remote LE SC OOB data.
1339 */
1340 void bt_le_oob_set_sc_flag(bool enable);
1341
1342 /** @brief Allow/disallow remote legacy OOB data to be used for pairing.
1343 *
1344 * Set/clear the OOB data flag for legacy SMP Pairing Request/Response data.
1345 *
1346 * @param enable Value allowing/disallowing remote legacy OOB data.
1347 */
1348 void bt_le_oob_set_legacy_flag(bool enable);
1349
1350 /** @brief Set OOB Temporary Key to be used for pairing
1351 *
1352 * This function allows to set OOB data for the LE legacy pairing procedure.
1353 * The function should only be called in response to the oob_data_request()
1354 * callback provided that the legacy method is user pairing.
1355 *
1356 * @param conn Connection object
1357 * @param tk Pointer to 16 byte long TK array
1358 *
1359 * @return Zero on success or -EINVAL if NULL
1360 */
1361 int bt_le_oob_set_legacy_tk(struct bt_conn *conn, const uint8_t *tk);
1362
1363 /** @brief Set OOB data during LE Secure Connections (SC) pairing procedure
1364 *
1365 * This function allows to set OOB data during the LE SC pairing procedure.
1366 * The function should only be called in response to the oob_data_request()
1367 * callback provided that LE SC method is used for pairing.
1368 *
1369 * The user should submit OOB data according to the information received in the
1370 * callback. This may yield three different configurations: with only local OOB
1371 * data present, with only remote OOB data present or with both local and
1372 * remote OOB data present.
1373 *
1374 * @param conn Connection object
1375 * @param oobd_local Local OOB data or NULL if not present
1376 * @param oobd_remote Remote OOB data or NULL if not present
1377 *
1378 * @return Zero on success or error code otherwise, positive in case of
1379 * protocol error or negative (POSIX) in case of stack internal error.
1380 */
1381 int bt_le_oob_set_sc_data(struct bt_conn *conn,
1382 const struct bt_le_oob_sc_data *oobd_local,
1383 const struct bt_le_oob_sc_data *oobd_remote);
1384
1385 /** @brief Get OOB data used for LE Secure Connections (SC) pairing procedure
1386 *
1387 * This function allows to get OOB data during the LE SC pairing procedure that
1388 * were set by the bt_le_oob_set_sc_data() API.
1389 *
1390 * @note The OOB data will only be available as long as the connection object
1391 * associated with it is valid.
1392 *
1393 * @param conn Connection object
1394 * @param oobd_local Local OOB data or NULL if not set
1395 * @param oobd_remote Remote OOB data or NULL if not set
1396 *
1397 * @return Zero on success or error code otherwise, positive in case of
1398 * protocol error or negative (POSIX) in case of stack internal error.
1399 */
1400 int bt_le_oob_get_sc_data(struct bt_conn *conn,
1401 const struct bt_le_oob_sc_data **oobd_local,
1402 const struct bt_le_oob_sc_data **oobd_remote);
1403
1404 /**
1405 * Special passkey value that can be used to disable a previously
1406 * set fixed passkey.
1407 */
1408 #define BT_PASSKEY_INVALID 0xffffffff
1409
1410 /** @brief Set a fixed passkey to be used for pairing.
1411 *
1412 * This API is only available when the CONFIG_BT_FIXED_PASSKEY
1413 * configuration option has been enabled.
1414 *
1415 * Sets a fixed passkey to be used for pairing. If set, the
1416 * pairing_confirm() callback will be called for all incoming pairings.
1417 *
1418 * @param passkey A valid passkey (0 - 999999) or BT_PASSKEY_INVALID
1419 * to disable a previously set fixed passkey.
1420 *
1421 * @return 0 on success or a negative error code on failure.
1422 */
1423 int bt_passkey_set(unsigned int passkey);
1424
1425 /** Info Structure for OOB pairing */
1426 struct bt_conn_oob_info {
1427 /** Type of OOB pairing method */
1428 enum {
1429 /** LE legacy pairing */
1430 BT_CONN_OOB_LE_LEGACY,
1431
1432 /** LE SC pairing */
1433 BT_CONN_OOB_LE_SC,
1434 } type;
1435
1436 union {
1437 /** LE Secure Connections OOB pairing parameters */
1438 struct {
1439 /** OOB data configuration */
1440 enum {
1441 /** Local OOB data requested */
1442 BT_CONN_OOB_LOCAL_ONLY,
1443
1444 /** Remote OOB data requested */
1445 BT_CONN_OOB_REMOTE_ONLY,
1446
1447 /** Both local and remote OOB data requested */
1448 BT_CONN_OOB_BOTH_PEERS,
1449
1450 /** No OOB data requested */
1451 BT_CONN_OOB_NO_DATA,
1452 } oob_config;
1453 } lesc;
1454 };
1455 };
1456
1457 #if defined(CONFIG_BT_SMP_APP_PAIRING_ACCEPT)
1458 /** @brief Pairing request and pairing response info structure.
1459 *
1460 * This structure is the same for both smp_pairing_req and smp_pairing_rsp
1461 * and a subset of the packet data, except for the initial Code octet.
1462 * It is documented in Core Spec. Vol. 3, Part H, 3.5.1 and 3.5.2.
1463 */
1464 struct bt_conn_pairing_feat {
1465 /** IO Capability, Core Spec. Vol 3, Part H, 3.5.1, Table 3.4 */
1466 uint8_t io_capability;
1467
1468 /** OOB data flag, Core Spec. Vol 3, Part H, 3.5.1, Table 3.5 */
1469 uint8_t oob_data_flag;
1470
1471 /** AuthReq, Core Spec. Vol 3, Part H, 3.5.1, Fig. 3.3 */
1472 uint8_t auth_req;
1473
1474 /** Maximum Encryption Key Size, Core Spec. Vol 3, Part H, 3.5.1 */
1475 uint8_t max_enc_key_size;
1476
1477 /** Initiator Key Distribution/Generation, Core Spec. Vol 3, Part H,
1478 * 3.6.1, Fig. 3.11
1479 */
1480 uint8_t init_key_dist;
1481
1482 /** Responder Key Distribution/Generation, Core Spec. Vol 3, Part H
1483 * 3.6.1, Fig. 3.11
1484 */
1485 uint8_t resp_key_dist;
1486 };
1487 #endif /* CONFIG_BT_SMP_APP_PAIRING_ACCEPT */
1488
1489 /** Authenticated pairing callback structure */
1490 struct bt_conn_auth_cb {
1491 #if defined(CONFIG_BT_SMP_APP_PAIRING_ACCEPT)
1492 /** @brief Query to proceed incoming pairing or not.
1493 *
1494 * On any incoming pairing req/rsp this callback will be called for
1495 * the application to decide whether to allow for the pairing to
1496 * continue.
1497 *
1498 * The pairing info received from the peer is passed to assist
1499 * making the decision.
1500 *
1501 * As this callback is synchronous the application should return
1502 * a response value immediately. Otherwise it may affect the
1503 * timing during pairing. Hence, this information should not be
1504 * conveyed to the user to take action.
1505 *
1506 * The remaining callbacks are not affected by this, but do notice
1507 * that other callbacks can be called during the pairing. Eg. if
1508 * pairing_confirm is registered both will be called for Just-Works
1509 * pairings.
1510 *
1511 * This callback may be unregistered in which case pairing continues
1512 * as if the Kconfig flag was not set.
1513 *
1514 * This callback is not called for BR/EDR Secure Simple Pairing (SSP).
1515 *
1516 * @param conn Connection where pairing is initiated.
1517 * @param feat Pairing req/resp info.
1518 */
1519 enum bt_security_err (*pairing_accept)(struct bt_conn *conn,
1520 const struct bt_conn_pairing_feat *const feat);
1521 #endif /* CONFIG_BT_SMP_APP_PAIRING_ACCEPT */
1522
1523 /** @brief Display a passkey to the user.
1524 *
1525 * When called the application is expected to display the given
1526 * passkey to the user, with the expectation that the passkey will
1527 * then be entered on the peer device. The passkey will be in the
1528 * range of 0 - 999999, and is expected to be padded with zeroes so
1529 * that six digits are always shown. E.g. the value 37 should be
1530 * shown as 000037.
1531 *
1532 * This callback may be set to NULL, which means that the local
1533 * device lacks the ability do display a passkey. If set
1534 * to non-NULL the cancel callback must also be provided, since
1535 * this is the only way the application can find out that it should
1536 * stop displaying the passkey.
1537 *
1538 * @param conn Connection where pairing is currently active.
1539 * @param passkey Passkey to show to the user.
1540 */
1541 void (*passkey_display)(struct bt_conn *conn, unsigned int passkey);
1542
1543 #if defined(CONFIG_BT_PASSKEY_KEYPRESS)
1544 /** @brief Receive Passkey Keypress Notification during pairing
1545 *
1546 * This allows the remote device to use the local device to give users
1547 * feedback on the progress of entering the passkey over there. This is
1548 * useful when the remote device itself has no display suitable for
1549 * showing the progress.
1550 *
1551 * The handler of this callback is expected to keep track of the number
1552 * of digits entered and show a password-field-like feedback to the
1553 * user.
1554 *
1555 * This callback is only relevant while the local side does Passkey
1556 * Display.
1557 *
1558 * The event type is verified to be in range of the enum. No other
1559 * sanitization has been done. The remote could send a large number of
1560 * events of any type in any order.
1561 *
1562 * @param conn The related connection.
1563 * @param type Type of event. Verified in range of the enum.
1564 */
1565 void (*passkey_display_keypress)(struct bt_conn *conn,
1566 enum bt_conn_auth_keypress type);
1567 #endif
1568
1569 /** @brief Request the user to enter a passkey.
1570 *
1571 * When called the user is expected to enter a passkey. The passkey
1572 * must be in the range of 0 - 999999, and should be expected to
1573 * be zero-padded, as that's how the peer device will typically be
1574 * showing it (e.g. 37 would be shown as 000037).
1575 *
1576 * Once the user has entered the passkey its value should be given
1577 * to the stack using the bt_conn_auth_passkey_entry() API.
1578 *
1579 * This callback may be set to NULL, which means that the local
1580 * device lacks the ability to enter a passkey. If set to non-NULL
1581 * the cancel callback must also be provided, since this is the
1582 * only way the application can find out that it should stop
1583 * requesting the user to enter a passkey.
1584 *
1585 * @param conn Connection where pairing is currently active.
1586 */
1587 void (*passkey_entry)(struct bt_conn *conn);
1588
1589 /** @brief Request the user to confirm a passkey.
1590 *
1591 * When called the user is expected to confirm that the given
1592 * passkey is also shown on the peer device.. The passkey will
1593 * be in the range of 0 - 999999, and should be zero-padded to
1594 * always be six digits (e.g. 37 would be shown as 000037).
1595 *
1596 * Once the user has confirmed the passkey to match, the
1597 * bt_conn_auth_passkey_confirm() API should be called. If the
1598 * user concluded that the passkey doesn't match the
1599 * bt_conn_auth_cancel() API should be called.
1600 *
1601 * This callback may be set to NULL, which means that the local
1602 * device lacks the ability to confirm a passkey. If set to non-NULL
1603 * the cancel callback must also be provided, since this is the
1604 * only way the application can find out that it should stop
1605 * requesting the user to confirm a passkey.
1606 *
1607 * @param conn Connection where pairing is currently active.
1608 * @param passkey Passkey to be confirmed.
1609 */
1610 void (*passkey_confirm)(struct bt_conn *conn, unsigned int passkey);
1611
1612 /** @brief Request the user to provide Out of Band (OOB) data.
1613 *
1614 * When called the user is expected to provide OOB data. The required
1615 * data are indicated by the information structure.
1616 *
1617 * For LE Secure Connections OOB pairing, the user should provide
1618 * local OOB data, remote OOB data or both depending on their
1619 * availability. Their value should be given to the stack using the
1620 * bt_le_oob_set_sc_data() API.
1621 *
1622 * This callback must be set to non-NULL in order to support OOB
1623 * pairing.
1624 *
1625 * @param conn Connection where pairing is currently active.
1626 * @param info OOB pairing information.
1627 */
1628 void (*oob_data_request)(struct bt_conn *conn,
1629 struct bt_conn_oob_info *info);
1630
1631 /** @brief Cancel the ongoing user request.
1632 *
1633 * This callback will be called to notify the application that it
1634 * should cancel any previous user request (passkey display, entry
1635 * or confirmation).
1636 *
1637 * This may be set to NULL, but must always be provided whenever the
1638 * passkey_display, passkey_entry passkey_confirm or pairing_confirm
1639 * callback has been provided.
1640 *
1641 * @param conn Connection where pairing is currently active.
1642 */
1643 void (*cancel)(struct bt_conn *conn);
1644
1645 /** @brief Request confirmation for an incoming pairing.
1646 *
1647 * This callback will be called to confirm an incoming pairing
1648 * request where none of the other user callbacks is applicable.
1649 *
1650 * If the user decides to accept the pairing the
1651 * bt_conn_auth_pairing_confirm() API should be called. If the
1652 * user decides to reject the pairing the bt_conn_auth_cancel() API
1653 * should be called.
1654 *
1655 * This callback may be set to NULL, which means that the local
1656 * device lacks the ability to confirm a pairing request. If set
1657 * to non-NULL the cancel callback must also be provided, since
1658 * this is the only way the application can find out that it should
1659 * stop requesting the user to confirm a pairing request.
1660 *
1661 * @param conn Connection where pairing is currently active.
1662 */
1663 void (*pairing_confirm)(struct bt_conn *conn);
1664
1665 #if defined(CONFIG_BT_CLASSIC)
1666 /** @brief Request the user to enter a passkey.
1667 *
1668 * This callback will be called for a BR/EDR (Bluetooth Classic)
1669 * connection where pairing is being performed. Once called the
1670 * user is expected to enter a PIN code with a length between
1671 * 1 and 16 digits. If the @a highsec parameter is set to true
1672 * the PIN code must be 16 digits long.
1673 *
1674 * Once entered, the PIN code should be given to the stack using
1675 * the bt_conn_auth_pincode_entry() API.
1676 *
1677 * This callback may be set to NULL, however in that case pairing
1678 * over BR/EDR will not be possible. If provided, the cancel
1679 * callback must be provided as well.
1680 *
1681 * @param conn Connection where pairing is currently active.
1682 * @param highsec true if 16 digit PIN is required.
1683 */
1684 void (*pincode_entry)(struct bt_conn *conn, bool highsec);
1685 #endif
1686 };
1687
1688 /** Authenticated pairing information callback structure */
1689 struct bt_conn_auth_info_cb {
1690 /** @brief notify that pairing procedure was complete.
1691 *
1692 * This callback notifies the application that the pairing procedure
1693 * has been completed.
1694 *
1695 * @param conn Connection object.
1696 * @param bonded Bond information has been distributed during the
1697 * pairing procedure.
1698 */
1699 void (*pairing_complete)(struct bt_conn *conn, bool bonded);
1700
1701 /** @brief notify that pairing process has failed.
1702 *
1703 * @param conn Connection object.
1704 * @param reason Pairing failed reason
1705 */
1706 void (*pairing_failed)(struct bt_conn *conn,
1707 enum bt_security_err reason);
1708
1709 /** @brief Notify that bond has been deleted.
1710 *
1711 * This callback notifies the application that the bond information
1712 * for the remote peer has been deleted
1713 *
1714 * @param id Which local identity had the bond.
1715 * @param peer Remote address.
1716 */
1717 void (*bond_deleted)(uint8_t id, const bt_addr_le_t *peer);
1718
1719 /** Internally used field for list handling */
1720 sys_snode_t node;
1721 };
1722
1723 /** @brief Register authentication callbacks.
1724 *
1725 * Register callbacks to handle authenticated pairing. Passing NULL
1726 * unregisters a previous callbacks structure.
1727 *
1728 * @param cb Callback struct.
1729 *
1730 * @return Zero on success or negative error code otherwise
1731 */
1732 int bt_conn_auth_cb_register(const struct bt_conn_auth_cb *cb);
1733
1734 /** @brief Overlay authentication callbacks used for a given connection.
1735 *
1736 * This function can be used only for Bluetooth LE connections.
1737 * The @kconfig{CONFIG_BT_SMP} must be enabled for this function.
1738 *
1739 * The authentication callbacks for a given connection cannot be overlaid if
1740 * security procedures in the SMP module have already started. This function
1741 * can be called only once per connection.
1742 *
1743 * @param conn Connection object.
1744 * @param cb Callback struct.
1745 *
1746 * @return Zero on success or negative error code otherwise
1747 */
1748 int bt_conn_auth_cb_overlay(struct bt_conn *conn, const struct bt_conn_auth_cb *cb);
1749
1750 /** @brief Register authentication information callbacks.
1751 *
1752 * Register callbacks to get authenticated pairing information. Multiple
1753 * registrations can be done.
1754 *
1755 * @param cb Callback struct.
1756 *
1757 * @return Zero on success or negative error code otherwise
1758 */
1759 int bt_conn_auth_info_cb_register(struct bt_conn_auth_info_cb *cb);
1760
1761 /** @brief Unregister authentication information callbacks.
1762 *
1763 * Unregister callbacks to stop getting authenticated pairing information.
1764 *
1765 * @param cb Callback struct.
1766 *
1767 * @return Zero on success or negative error code otherwise
1768 */
1769 int bt_conn_auth_info_cb_unregister(struct bt_conn_auth_info_cb *cb);
1770
1771 /** @brief Reply with entered passkey.
1772 *
1773 * This function should be called only after passkey_entry callback from
1774 * bt_conn_auth_cb structure was called.
1775 *
1776 * @param conn Connection object.
1777 * @param passkey Entered passkey.
1778 *
1779 * @return Zero on success or negative error code otherwise
1780 */
1781 int bt_conn_auth_passkey_entry(struct bt_conn *conn, unsigned int passkey);
1782
1783 /** @brief Send Passkey Keypress Notification during pairing
1784 *
1785 * This function may be called only after passkey_entry callback from
1786 * bt_conn_auth_cb structure was called.
1787 *
1788 * Requires @kconfig{CONFIG_BT_PASSKEY_KEYPRESS}.
1789 *
1790 * @param conn Destination for the notification.
1791 * @param type What keypress event type to send. @see bt_conn_auth_keypress.
1792 *
1793 * @retval 0 Success
1794 * @retval -EINVAL Improper use of the API.
1795 * @retval -ENOMEM Failed to allocate.
1796 * @retval -ENOBUFS Failed to allocate.
1797 */
1798 int bt_conn_auth_keypress_notify(struct bt_conn *conn, enum bt_conn_auth_keypress type);
1799
1800 /** @brief Cancel ongoing authenticated pairing.
1801 *
1802 * This function allows to cancel ongoing authenticated pairing.
1803 *
1804 * @param conn Connection object.
1805 *
1806 * @return Zero on success or negative error code otherwise
1807 */
1808 int bt_conn_auth_cancel(struct bt_conn *conn);
1809
1810 /** @brief Reply if passkey was confirmed to match by user.
1811 *
1812 * This function should be called only after passkey_confirm callback from
1813 * bt_conn_auth_cb structure was called.
1814 *
1815 * @param conn Connection object.
1816 *
1817 * @return Zero on success or negative error code otherwise
1818 */
1819 int bt_conn_auth_passkey_confirm(struct bt_conn *conn);
1820
1821 /** @brief Reply if incoming pairing was confirmed by user.
1822 *
1823 * This function should be called only after pairing_confirm callback from
1824 * bt_conn_auth_cb structure was called if user confirmed incoming pairing.
1825 *
1826 * @param conn Connection object.
1827 *
1828 * @return Zero on success or negative error code otherwise
1829 */
1830 int bt_conn_auth_pairing_confirm(struct bt_conn *conn);
1831
1832 /** @brief Reply with entered PIN code.
1833 *
1834 * This function should be called only after PIN code callback from
1835 * bt_conn_auth_cb structure was called. It's for legacy 2.0 devices.
1836 *
1837 * @param conn Connection object.
1838 * @param pin Entered PIN code.
1839 *
1840 * @return Zero on success or negative error code otherwise
1841 */
1842 int bt_conn_auth_pincode_entry(struct bt_conn *conn, const char *pin);
1843
1844 /** Connection parameters for BR/EDR connections */
1845 struct bt_br_conn_param {
1846 bool allow_role_switch;
1847 };
1848
1849 /** @brief Initialize BR/EDR connection parameters
1850 *
1851 * @param role_switch True if role switch is allowed
1852 */
1853 #define BT_BR_CONN_PARAM_INIT(role_switch) \
1854 { \
1855 .allow_role_switch = (role_switch), \
1856 }
1857
1858 /** Helper to declare BR/EDR connection parameters inline
1859 *
1860 * @param role_switch True if role switch is allowed
1861 */
1862 #define BT_BR_CONN_PARAM(role_switch) \
1863 ((struct bt_br_conn_param[]) { \
1864 BT_BR_CONN_PARAM_INIT(role_switch) \
1865 })
1866
1867 /** Default BR/EDR connection parameters:
1868 * Role switch allowed
1869 */
1870 #define BT_BR_CONN_PARAM_DEFAULT BT_BR_CONN_PARAM(true)
1871
1872
1873 /** @brief Initiate an BR/EDR connection to a remote device.
1874 *
1875 * Allows initiate new BR/EDR link to remote peer using its address.
1876 *
1877 * The caller gets a new reference to the connection object which must be
1878 * released with bt_conn_unref() once done using the object.
1879 *
1880 * @param peer Remote address.
1881 * @param param Initial connection parameters.
1882 *
1883 * @return Valid connection object on success or NULL otherwise.
1884 */
1885 struct bt_conn *bt_conn_create_br(const bt_addr_t *peer,
1886 const struct bt_br_conn_param *param);
1887
1888 #ifdef __cplusplus
1889 }
1890 #endif
1891
1892 /**
1893 * @}
1894 */
1895
1896 #endif /* ZEPHYR_INCLUDE_BLUETOOTH_CONN_H_ */
1897
