1 /* 2 * Copyright (C) 2014 BlueKitchen GmbH 3 * 4 * Redistribution and use in source and binary forms, with or without 5 * modification, are permitted provided that the following conditions 6 * are met: 7 * 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 3. Neither the name of the copyright holders nor the names of 14 * contributors may be used to endorse or promote products derived 15 * from this software without specific prior written permission. 16 * 4. Any redistribution, use, or modification is done solely for 17 * personal benefit and not for any commercial purpose or for 18 * monetary gain. 19 * 20 * THIS SOFTWARE IS PROVIDED BY BLUEKITCHEN GMBH AND CONTRIBUTORS 21 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 22 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS 23 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL MATTHIAS 24 * RINGWALD OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, 25 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, 26 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS 27 * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED 28 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, 29 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF 30 * THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 31 * SUCH DAMAGE. 32 * 33 * Please inquire about commercial licensing options at 34 * [email protected] 35 * 36 */ 37 38 #ifndef __GAP_H 39 #define __GAP_H 40 41 #if defined __cplusplus 42 extern "C" { 43 #endif 44 45 #include "btstack_defines.h" 46 #include "btstack_util.h" 47 #include "classic/btstack_link_key_db.h" 48 49 typedef enum { 50 51 // MITM protection not required 52 // No encryption required 53 // No user interaction required 54 LEVEL_0 = 0, 55 56 // MITM protection not required 57 // No encryption required 58 // Minimal user interaction desired 59 LEVEL_1, 60 61 // MITM protection not required 62 // Encryption required 63 LEVEL_2, 64 65 // MITM protection required 66 // Encryption required 67 // User interaction acceptable 68 LEVEL_3, 69 70 // MITM protection required 71 // Encryption required 72 // 128-bit equivalent strength for link and encryption keys required (P-192 is not enough) 73 // User interaction acceptable 74 LEVEL_4, 75 } gap_security_level_t; 76 77 typedef enum { 78 GAP_SECURITY_NONE, 79 GAP_SECUIRTY_ENCRYPTED, // SSP: JUST WORKS 80 GAP_SECURITY_AUTHENTICATED, // SSP: numeric comparison, passkey, OOB 81 // GAP_SECURITY_AUTHORIZED 82 } gap_security_state; 83 84 typedef enum { 85 GAP_CONNECTION_INVALID, 86 GAP_CONNECTION_ACL, 87 GAP_CONNECTION_SCO, 88 GAP_CONNECTION_LE 89 } gap_connection_type_t; 90 91 typedef struct le_connection_parameter_range{ 92 uint16_t le_conn_interval_min; 93 uint16_t le_conn_interval_max; 94 uint16_t le_conn_latency_min; 95 uint16_t le_conn_latency_max; 96 uint16_t le_supervision_timeout_min; 97 uint16_t le_supervision_timeout_max; 98 } le_connection_parameter_range_t; 99 100 typedef enum { 101 GAP_RANDOM_ADDRESS_TYPE_OFF = 0, 102 GAP_RANDOM_ADDRESS_TYPE_STATIC, 103 GAP_RANDOM_ADDRESS_NON_RESOLVABLE, 104 GAP_RANDOM_ADDRESS_RESOLVABLE, 105 } gap_random_address_type_t; 106 107 // Authorization state 108 typedef enum { 109 AUTHORIZATION_UNKNOWN, 110 AUTHORIZATION_PENDING, 111 AUTHORIZATION_DECLINED, 112 AUTHORIZATION_GRANTED 113 } authorization_state_t; 114 115 116 /* API_START */ 117 118 // Classic + LE 119 120 /** 121 * @brief Disconnect connection with handle 122 * @param handle 123 */ 124 uint8_t gap_disconnect(hci_con_handle_t handle); 125 126 /** 127 * @brief Get connection type 128 * @param con_handle 129 * @result connection_type 130 */ 131 gap_connection_type_t gap_get_connection_type(hci_con_handle_t connection_handle); 132 133 // Classic 134 135 /** 136 * @brief Sets local name. 137 * @note has to be done before stack starts up 138 * @note Default name is 'BTstack 00:00:00:00:00:00' 139 * @note '00:00:00:00:00:00' in local_name will be replaced with actual bd addr 140 * @param name is not copied, make sure memory is accessible during stack startup 141 */ 142 void gap_set_local_name(const char * local_name); 143 144 /** 145 * @brief Set Extended Inquiry Response data 146 * @note has to be done before stack starts up 147 * @note If not set, local name will be used for EIR data (see gap_set_local_name) 148 * @note '00:00:00:00:00:00' in local_name will be replaced with actual bd addr 149 * @param eir_data size 240 bytes, is not copied make sure memory is accessible during stack startup 150 */ 151 void gap_set_extended_inquiry_response(const uint8_t * data); 152 153 /** 154 * @brief Set class of device that will be set during Bluetooth init. 155 * @note has to be done before stack starts up 156 */ 157 void gap_set_class_of_device(uint32_t class_of_device); 158 159 /** 160 * @brief Set default link policy settings for all classic ACL links 161 * @param default_link_policy_settings - see LM_LINK_POLICY_* in bluetooth.h 162 * @note common value: LM_LINK_POLICY_ENABLE_ROLE_SWITCH | LM_LINK_POLICY_ENABLE_SNIFF_MODE to enable role switch and sniff mode 163 * @note has to be done before stack starts up 164 */ 165 void gap_set_default_link_policy_settings(uint16_t default_link_policy_settings); 166 167 /** 168 * @brief Enable/disable bonding. Default is enabled. 169 * @param enabled 170 */ 171 void gap_set_bondable_mode(int enabled); 172 173 /** 174 * @brief Get bondable mode. 175 * @return 1 if bondable 176 */ 177 int gap_get_bondable_mode(void); 178 179 /* Configure Secure Simple Pairing */ 180 181 /** 182 * @brief Enable will enable SSP during init. 183 */ 184 void gap_ssp_set_enable(int enable); 185 186 /** 187 * @brief Set IO Capability. BTstack will return capability to SSP requests 188 */ 189 void gap_ssp_set_io_capability(int ssp_io_capability); 190 191 /** 192 * @brief Set Authentication Requirements using during SSP 193 */ 194 void gap_ssp_set_authentication_requirement(int authentication_requirement); 195 196 /** 197 * @brief If set, BTstack will confirm a numeric comparison and enter '000000' if requested. 198 */ 199 void gap_ssp_set_auto_accept(int auto_accept); 200 201 /** 202 * @brief Start dedicated bonding with device. Disconnect after bonding. 203 * @param device 204 * @param request MITM protection 205 * @return error, if max num acl connections active 206 * @result GAP_DEDICATED_BONDING_COMPLETE 207 */ 208 int gap_dedicated_bonding(bd_addr_t device, int mitm_protection_required); 209 210 gap_security_level_t gap_security_level_for_link_key_type(link_key_type_t link_key_type); 211 gap_security_level_t gap_security_level(hci_con_handle_t con_handle); 212 213 void gap_request_security_level(hci_con_handle_t con_handle, gap_security_level_t level); 214 215 int gap_mitm_protection_required_for_security_level(gap_security_level_t level); 216 217 // LE 218 219 /** 220 * @brief Set parameters for LE Scan 221 */ 222 void gap_set_scan_parameters(uint8_t scan_type, uint16_t scan_interval, uint16_t scan_window); 223 224 /** 225 * @brief Start LE Scan 226 */ 227 void gap_start_scan(void); 228 229 /** 230 * @brief Stop LE Scan 231 */ 232 void gap_stop_scan(void); 233 234 /** 235 * @brief Enable privacy by using random addresses 236 * @param random_address_type to use (incl. OFF) 237 */ 238 void gap_random_address_set_mode(gap_random_address_type_t random_address_type); 239 240 /** 241 * @brief Get privacy mode 242 */ 243 gap_random_address_type_t gap_random_address_get_mode(void); 244 245 /** 246 * @brief Sets update period for random address 247 * @param period_ms in ms 248 */ 249 void gap_random_address_set_update_period(int period_ms); 250 251 /** 252 * @brief Sets a fixed random address for advertising 253 * @param addr 254 * @note Sets random address mode to type off 255 */ 256 void gap_random_address_set(bd_addr_t addr); 257 258 /** 259 * @brief Set Advertisement Data 260 * @param advertising_data_length 261 * @param advertising_data (max 31 octets) 262 * @note data is not copied, pointer has to stay valid 263 * @note '00:00:00:00:00:00' in advertising_data will be replaced with actual bd addr 264 */ 265 void gap_advertisements_set_data(uint8_t advertising_data_length, uint8_t * advertising_data); 266 267 /** 268 * @brief Set Advertisement Paramters 269 * @param adv_int_min 270 * @param adv_int_max 271 * @param adv_type 272 * @param direct_address_type 273 * @param direct_address 274 * @param channel_map 275 * @param filter_policy 276 * @note own_address_type is used from gap_random_address_set_mode 277 */ 278 void gap_advertisements_set_params(uint16_t adv_int_min, uint16_t adv_int_max, uint8_t adv_type, 279 uint8_t direct_address_typ, bd_addr_t direct_address, uint8_t channel_map, uint8_t filter_policy); 280 281 /** 282 * @brief Enable/Disable Advertisements. OFF by default. 283 * @param enabled 284 */ 285 void gap_advertisements_enable(int enabled); 286 287 /** 288 * @brief Set Scan Response Data 289 * 290 * @note For scan response data, scannable undirected advertising (ADV_SCAN_IND) need to be used 291 * 292 * @param advertising_data_length 293 * @param advertising_data (max 31 octets) 294 * @note data is not copied, pointer has to stay valid 295 * @note '00:00:00:00:00:00' in scan_response_data will be replaced with actual bd addr 296 */ 297 void gap_scan_response_set_data(uint8_t scan_response_data_length, uint8_t * scan_response_data); 298 299 /** 300 * @brief Set connection parameters for outgoing connections 301 * @param conn_scan_interval (unit: 0.625 msec), default: 60 ms 302 * @param conn_scan_window (unit: 0.625 msec), default: 30 ms 303 * @param conn_interval_min (unit: 1.25ms), default: 10 ms 304 * @param conn_interval_max (unit: 1.25ms), default: 30 ms 305 * @param conn_latency, default: 4 306 * @param supervision_timeout (unit: 10ms), default: 720 ms 307 * @param min_ce_length (unit: 0.625ms), default: 10 ms 308 * @param max_ce_length (unit: 0.625ms), default: 30 ms 309 */ 310 void gap_set_connection_parameters(uint16_t conn_scan_interval, uint16_t conn_scan_window, 311 uint16_t conn_interval_min, uint16_t conn_interval_max, uint16_t conn_latency, 312 uint16_t supervision_timeout, uint16_t min_ce_length, uint16_t max_ce_length); 313 314 /** 315 * @brief Request an update of the connection parameter for a given LE connection 316 * @param handle 317 * @param conn_interval_min (unit: 1.25ms) 318 * @param conn_interval_max (unit: 1.25ms) 319 * @param conn_latency 320 * @param supervision_timeout (unit: 10ms) 321 * @returns 0 if ok 322 */ 323 int gap_request_connection_parameter_update(hci_con_handle_t con_handle, uint16_t conn_interval_min, 324 uint16_t conn_interval_max, uint16_t conn_latency, uint16_t supervision_timeout); 325 326 /** 327 * @brief Updates the connection parameters for a given LE connection 328 * @param handle 329 * @param conn_interval_min (unit: 1.25ms) 330 * @param conn_interval_max (unit: 1.25ms) 331 * @param conn_latency 332 * @param supervision_timeout (unit: 10ms) 333 * @returns 0 if ok 334 */ 335 int gap_update_connection_parameters(hci_con_handle_t con_handle, uint16_t conn_interval_min, 336 uint16_t conn_interval_max, uint16_t conn_latency, uint16_t supervision_timeout); 337 338 /** 339 * @brief Set accepted connection parameter range 340 * @param range 341 */ 342 void gap_get_connection_parameter_range(le_connection_parameter_range_t * range); 343 344 /** 345 * @brief Get accepted connection parameter range 346 * @param range 347 */ 348 void gap_set_connection_parameter_range(le_connection_parameter_range_t * range); 349 350 /** 351 * @brief Test if connection parameters are inside in existing rage 352 * @param conn_interval_min (unit: 1.25ms) 353 * @param conn_interval_max (unit: 1.25ms) 354 * @param conn_latency 355 * @param supervision_timeout (unit: 10ms) 356 * @returns 1 if included 357 */ 358 int gap_connection_parameter_range_included(le_connection_parameter_range_t * existing_range, uint16_t le_conn_interval_min, uint16_t le_conn_interval_max, uint16_t le_conn_latency, uint16_t le_supervision_timeout); 359 360 /** 361 * @brief Set max number of connections in LE Peripheral role (if Bluetooth Controller supports it) 362 * @note: default: 1 363 * @param max_peripheral_connections 364 */ 365 void gap_set_max_number_peripheral_connections(int max_peripheral_connections); 366 367 /** 368 * @brief Connect to remote LE device 369 */ 370 uint8_t gap_connect(bd_addr_t addr, bd_addr_type_t addr_type); 371 372 /** 373 * @brief Cancel connection process initiated by gap_connect 374 */ 375 uint8_t gap_connect_cancel(void); 376 377 /** 378 * @brief Auto Connection Establishment - Start Connecting to device 379 * @param address_typ 380 * @param address 381 * @returns 0 if ok 382 */ 383 int gap_auto_connection_start(bd_addr_type_t address_typ, bd_addr_t address); 384 385 /** 386 * @brief Auto Connection Establishment - Stop Connecting to device 387 * @param address_typ 388 * @param address 389 * @returns 0 if ok 390 */ 391 int gap_auto_connection_stop(bd_addr_type_t address_typ, bd_addr_t address); 392 393 /** 394 * @brief Auto Connection Establishment - Stop everything 395 * @note Convenience function to stop all active auto connection attempts 396 */ 397 void gap_auto_connection_stop_all(void); 398 399 /** 400 * 401 * @brief Get encryption key size. 402 * @param con_handle 403 * @return 0 if not encrypted, 7-16 otherwise 404 */ 405 int gap_encryption_key_size(hci_con_handle_t con_handle); 406 407 /** 408 * @brief Get authentication property. 409 * @param con_handle 410 * @return 1 if bonded with OOB/Passkey (AND MITM protection) 411 */ 412 int gap_authenticated(hci_con_handle_t con_handle); 413 414 /** 415 * @brief Queries authorization state. 416 * @param con_handle 417 * @return authorization_state for the current session 418 */ 419 authorization_state_t gap_authorization_state(hci_con_handle_t con_handle); 420 421 // Classic 422 423 /** 424 * @brief Override page scan mode. Page scan mode enabled by l2cap when services are registered 425 * @note Might be used to reduce power consumption while Bluetooth module stays powered but no (new) 426 * connections are expected 427 */ 428 void gap_connectable_control(uint8_t enable); 429 430 /** 431 * @brief Allows to control if device is discoverable. OFF by default. 432 */ 433 void gap_discoverable_control(uint8_t enable); 434 435 /** 436 * @brief Gets local address. 437 */ 438 void gap_local_bd_addr(bd_addr_t address_buffer); 439 440 /** 441 * @brief Deletes link key for remote device with baseband address. 442 * @param addr 443 */ 444 void gap_drop_link_key_for_bd_addr(bd_addr_t addr); 445 446 /** 447 * @brief Delete all stored link keys 448 */ 449 void gap_delete_all_link_keys(void); 450 451 /** 452 * @brief Store link key for remote device with baseband address 453 * @param addr 454 * @param link_key 455 * @param link_key_type 456 */ 457 void gap_store_link_key_for_bd_addr(bd_addr_t addr, link_key_t link_key, link_key_type_t type); 458 459 /** 460 * @brief Setup Link Key iterator 461 * @param it 462 * @returns 1 on success 463 */ 464 int gap_link_key_iterator_init(btstack_link_key_iterator_t * it); 465 466 /** 467 * @brief Get next Link Key 468 * @param it 469 * @brief addr 470 * @brief link_key 471 * @brief type of link key 472 * @returns 1, if valid link key found 473 */ 474 int gap_link_key_iterator_get_next(btstack_link_key_iterator_t * it, bd_addr_t bd_addr, link_key_t link_key, link_key_type_t * type); 475 476 /** 477 * @brief Frees resources allocated by iterator_init 478 * @note Must be called after iteration to free resources 479 * @param it 480 */ 481 void gap_link_key_iterator_done(btstack_link_key_iterator_t * it); 482 483 /** 484 * @brief Start GAP Classic Inquiry 485 * @param duration in 1.28s units 486 * @return 0 if ok 487 * @events: GAP_EVENT_INQUIRY_RESULT, GAP_EVENT_INQUIRY_COMPLETE 488 */ 489 int gap_inquiry_start(uint8_t duration_in_1280ms_units); 490 491 /** 492 * @brief Stop GAP Classic Inquiry 493 * @brief Stop GAP Classic Inquiry 494 * @returns 0 if ok 495 * @events: GAP_EVENT_INQUIRY_COMPLETE 496 */ 497 int gap_inquiry_stop(void); 498 499 /** 500 * @brief Remote Name Request 501 * @param addr 502 * @param page_scan_repetition_mode 503 * @param clock_offset only used when bit 15 is set - pass 0 if not known 504 * @events: HCI_EVENT_REMOTE_NAME_REQUEST_COMPLETE 505 */ 506 int gap_remote_name_request(bd_addr_t addr, uint8_t page_scan_repetition_mode, uint16_t clock_offset); 507 508 /** 509 * @brief Legacy Pairing Pin Code Response 510 * @param addr 511 * @param pin 512 * @return 0 if ok 513 */ 514 int gap_pin_code_response(bd_addr_t addr, const char * pin); 515 516 /** 517 * @brief Abort Legacy Pairing 518 * @param addr 519 * @param pin 520 * @return 0 if ok 521 */ 522 int gap_pin_code_negative(bd_addr_t addr); 523 524 /** 525 * @brief SSP Passkey Response 526 * @param addr 527 * @param passkey [0..999999] 528 * @return 0 if ok 529 */ 530 int gap_ssp_passkey_response(bd_addr_t addr, uint32_t passkey); 531 532 /** 533 * @brief Abort SSP Passkey Entry/Pairing 534 * @param addr 535 * @param pin 536 * @return 0 if ok 537 */ 538 int gap_ssp_passkey_negative(bd_addr_t addr); 539 540 /** 541 * @brief Accept SSP Numeric Comparison 542 * @param addr 543 * @param passkey 544 * @return 0 if ok 545 */ 546 int gap_ssp_confirmation_response(bd_addr_t addr); 547 548 /** 549 * @brief Abort SSP Numeric Comparison/Pairing 550 * @param addr 551 * @param pin 552 * @return 0 if ok 553 */ 554 int gap_ssp_confirmation_negative(bd_addr_t addr); 555 556 557 558 // LE 559 560 /** 561 * @brief Get own addr type and address used for LE 562 */ 563 void gap_le_get_own_address(uint8_t * addr_type, bd_addr_t addr); 564 565 566 /** 567 * @brief Get state of connection re-encryptiong for bonded devices when in central role 568 * @note used by gatt_client and att_server to wait for re-encryption 569 * @param con_handle 570 * @return 1 if security setup is active 571 */ 572 int gap_reconnect_security_setup_active(hci_con_handle_t con_handle); 573 574 575 /* API_END*/ 576 577 #if defined __cplusplus 578 } 579 #endif 580 581 #endif // __GAP_H 582