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 /* 39 * hci.h 40 * 41 * Created by Matthias Ringwald on 4/29/09. 42 * 43 */ 44 45 #ifndef __HCI_H 46 #define __HCI_H 47 48 #include "btstack_config.h" 49 50 #include "btstack_chipset.h" 51 #include "btstack_control.h" 52 #include "btstack_linked_list.h" 53 #include "btstack_util.h" 54 #include "classic/btstack_link_key_db.h" 55 #include "hci_cmd.h" 56 #include "gap.h" 57 #include "hci_transport.h" 58 59 #include <stdint.h> 60 #include <stdlib.h> 61 #include <stdarg.h> 62 63 #if defined __cplusplus 64 extern "C" { 65 #endif 66 67 // packet buffer sizes 68 // HCI_ACL_PAYLOAD_SIZE is configurable and defined in config.h 69 // addition byte in even to terminate remote name request with '\0' 70 #define HCI_EVENT_BUFFER_SIZE (HCI_EVENT_HEADER_SIZE + HCI_EVENT_PAYLOAD_SIZE + 1) 71 #define HCI_CMD_BUFFER_SIZE (HCI_CMD_HEADER_SIZE + HCI_CMD_PAYLOAD_SIZE) 72 #define HCI_ACL_BUFFER_SIZE (HCI_ACL_HEADER_SIZE + HCI_ACL_PAYLOAD_SIZE) 73 74 // size of hci buffers, big enough for command, event, or acl packet without H4 packet type 75 // @note cmd buffer is bigger than event buffer 76 #ifdef HCI_PACKET_BUFFER_SIZE 77 #if HCI_PACKET_BUFFER_SIZE < HCI_ACL_BUFFER_SIZE 78 #error HCI_PACKET_BUFFER_SIZE must be equal or larger than HCI_ACL_BUFFER_SIZE 79 #endif 80 #if HCI_PACKET_BUFFER_SIZE < HCI_CMD_BUFFER_SIZE 81 #error HCI_PACKET_BUFFER_SIZE must be equal or larger than HCI_CMD_BUFFER_SIZE 82 #endif 83 #else 84 #if HCI_ACL_BUFFER_SIZE > HCI_CMD_BUFFER_SIZE 85 #define HCI_PACKET_BUFFER_SIZE HCI_ACL_BUFFER_SIZE 86 #else 87 #define HCI_PACKET_BUFFER_SIZE HCI_CMD_BUFFER_SIZE 88 #endif 89 #endif 90 91 // additional pre-buffer space for packets to Bluetooth module, for now, used for HCI Transport H4 DMA 92 #define HCI_OUTGOING_PRE_BUFFER_SIZE 1 93 94 // BNEP may uncompress the IP Header by 16 bytes 95 #ifndef HCI_INCOMING_PRE_BUFFER_SIZE 96 #define HCI_INCOMING_PRE_BUFFER_SIZE (16 - HCI_ACL_HEADER_SIZE - 4) 97 #endif 98 99 // 100 #define IS_COMMAND(packet, command) (little_endian_read_16(packet,0) == command.opcode) 101 102 // check if command complete event for given command 103 #define HCI_EVENT_IS_COMMAND_COMPLETE(event,cmd) ( event[0] == HCI_EVENT_COMMAND_COMPLETE && little_endian_read_16(event,3) == cmd.opcode) 104 #define HCI_EVENT_IS_COMMAND_STATUS(event,cmd) ( event[0] == HCI_EVENT_COMMAND_STATUS && little_endian_read_16(event,4) == cmd.opcode) 105 106 // Code+Len=2, Pkts+Opcode=3; total=5 107 #define OFFSET_OF_DATA_IN_COMMAND_COMPLETE 5 108 109 // ACL Packet 110 #define READ_ACL_CONNECTION_HANDLE( buffer ) ( little_endian_read_16(buffer,0) & 0x0fff) 111 #define READ_ACL_FLAGS( buffer ) ( buffer[1] >> 4 ) 112 #define READ_ACL_LENGTH( buffer ) (little_endian_read_16(buffer, 2)) 113 114 // Sneak peak into L2CAP Packet 115 #define READ_L2CAP_LENGTH(buffer) ( little_endian_read_16(buffer, 4)) 116 #define READ_L2CAP_CHANNEL_ID(buffer) ( little_endian_read_16(buffer, 6)) 117 118 /** 119 * LE connection parameter update state 120 */ 121 122 typedef enum { 123 CON_PARAMETER_UPDATE_NONE, 124 CON_PARAMETER_UPDATE_SEND_REQUEST, 125 CON_PARAMETER_UPDATE_SEND_RESPONSE, 126 CON_PARAMETER_UPDATE_CHANGE_HCI_CON_PARAMETERS, 127 CON_PARAMETER_UPDATE_DENY 128 } le_con_parameter_update_state_t; 129 130 // Authentication flags 131 typedef enum { 132 AUTH_FLAGS_NONE = 0x0000, 133 RECV_LINK_KEY_REQUEST = 0x0001, 134 HANDLE_LINK_KEY_REQUEST = 0x0002, 135 SENT_LINK_KEY_REPLY = 0x0004, 136 SENT_LINK_KEY_NEGATIVE_REQUEST = 0x0008, 137 RECV_LINK_KEY_NOTIFICATION = 0x0010, 138 DENY_PIN_CODE_REQUEST = 0x0040, 139 RECV_IO_CAPABILITIES_REQUEST = 0x0080, 140 SEND_IO_CAPABILITIES_REPLY = 0x0100, 141 SEND_USER_CONFIRM_REPLY = 0x0200, 142 SEND_USER_PASSKEY_REPLY = 0x0400, 143 144 // pairing status 145 LEGACY_PAIRING_ACTIVE = 0x2000, 146 SSP_PAIRING_ACTIVE = 0x4000, 147 148 // connection status 149 CONNECTION_ENCRYPTED = 0x8000, 150 } hci_authentication_flags_t; 151 152 /** 153 * Connection State 154 */ 155 typedef enum { 156 SEND_CREATE_CONNECTION = 0, 157 SENT_CREATE_CONNECTION, 158 SEND_CANCEL_CONNECTION, 159 SENT_CANCEL_CONNECTION, 160 RECEIVED_CONNECTION_REQUEST, 161 ACCEPTED_CONNECTION_REQUEST, 162 REJECTED_CONNECTION_REQUEST, 163 OPEN, 164 SEND_DISCONNECT, 165 SENT_DISCONNECT, 166 RECEIVED_DISCONNECTION_COMPLETE 167 } CONNECTION_STATE; 168 169 // bonding flags 170 enum { 171 BONDING_REQUEST_REMOTE_FEATURES = 0x01, 172 BONDING_RECEIVED_REMOTE_FEATURES = 0x02, 173 BONDING_REMOTE_SUPPORTS_SSP = 0x04, 174 BONDING_DISCONNECT_SECURITY_BLOCK = 0x08, 175 BONDING_DISCONNECT_DEDICATED_DONE = 0x10, 176 BONDING_SEND_AUTHENTICATE_REQUEST = 0x20, 177 BONDING_SEND_ENCRYPTION_REQUEST = 0x40, 178 BONDING_DEDICATED = 0x80, 179 BONDING_EMIT_COMPLETE_ON_DISCONNECT = 0x100 180 }; 181 182 typedef enum { 183 BLUETOOTH_OFF = 1, 184 BLUETOOTH_ON, 185 BLUETOOTH_ACTIVE 186 } BLUETOOTH_STATE; 187 188 // le central scanning state 189 typedef enum { 190 LE_SCAN_IDLE, 191 LE_START_SCAN, 192 LE_SCANNING, 193 LE_STOP_SCAN, 194 } le_scanning_state_t; 195 196 typedef enum { 197 LE_CONNECTING_IDLE, 198 LE_CONNECTING_DIRECT, 199 LE_CONNECTING_WHITELIST, 200 } le_connecting_state_t; 201 202 // 203 // SM internal types and globals 204 // 205 206 typedef enum { 207 208 // general states 209 // state = 0 210 SM_GENERAL_IDLE, 211 SM_GENERAL_SEND_PAIRING_FAILED, 212 SM_GENERAL_TIMEOUT, // no other security messages are exchanged 213 214 // Phase 1: Pairing Feature Exchange 215 SM_PH1_W4_USER_RESPONSE, 216 217 // Phase 2: Authenticating and Encrypting 218 219 // get random number for use as TK Passkey if we show it 220 SM_PH2_GET_RANDOM_TK, 221 SM_PH2_W4_RANDOM_TK, 222 223 // get local random number for confirm c1 224 SM_PH2_C1_GET_RANDOM_A, 225 SM_PH2_C1_W4_RANDOM_A, 226 SM_PH2_C1_GET_RANDOM_B, 227 SM_PH2_C1_W4_RANDOM_B, 228 229 // calculate confirm value for local side 230 // state = 10 231 SM_PH2_C1_GET_ENC_A, 232 SM_PH2_C1_W4_ENC_A, 233 SM_PH2_C1_GET_ENC_B, 234 SM_PH2_C1_W4_ENC_B, 235 236 // calculate confirm value for remote side 237 SM_PH2_C1_GET_ENC_C, 238 SM_PH2_C1_W4_ENC_C, 239 SM_PH2_C1_GET_ENC_D, 240 SM_PH2_C1_W4_ENC_D, 241 242 SM_PH2_C1_SEND_PAIRING_CONFIRM, 243 SM_PH2_SEND_PAIRING_RANDOM, 244 245 // calc STK 246 // state = 20 247 SM_PH2_CALC_STK, 248 SM_PH2_W4_STK, 249 250 SM_PH2_W4_CONNECTION_ENCRYPTED, 251 252 // Phase 3: Transport Specific Key Distribution 253 // calculate DHK, Y, EDIV, and LTK 254 SM_PH3_GET_RANDOM, 255 SM_PH3_W4_RANDOM, 256 SM_PH3_GET_DIV, 257 SM_PH3_W4_DIV, 258 SM_PH3_Y_GET_ENC, 259 SM_PH3_Y_W4_ENC, 260 SM_PH3_LTK_GET_ENC, 261 // state = 30 262 SM_PH3_LTK_W4_ENC, 263 SM_PH3_CSRK_GET_ENC, 264 SM_PH3_CSRK_W4_ENC, 265 266 // exchange keys 267 SM_PH3_DISTRIBUTE_KEYS, 268 SM_PH3_RECEIVE_KEYS, 269 270 // RESPONDER ROLE 271 // state = 35 272 SM_RESPONDER_IDLE, 273 SM_RESPONDER_SEND_SECURITY_REQUEST, 274 SM_RESPONDER_PH0_RECEIVED_LTK, 275 SM_RESPONDER_PH0_SEND_LTK_REQUESTED_NEGATIVE_REPLY, 276 SM_RESPONDER_PH1_W4_PAIRING_REQUEST, 277 SM_RESPONDER_PH1_PAIRING_REQUEST_RECEIVED, 278 SM_RESPONDER_PH1_SEND_PAIRING_RESPONSE, 279 SM_RESPONDER_PH1_W4_PAIRING_CONFIRM, 280 SM_RESPONDER_PH2_W4_PAIRING_RANDOM, 281 SM_RESPONDER_PH2_W4_LTK_REQUEST, 282 SM_RESPONDER_PH2_SEND_LTK_REPLY, 283 284 // Phase 4: re-establish previously distributed LTK 285 // state == 46 286 SM_RESPONDER_PH4_Y_GET_ENC, 287 SM_RESPONDER_PH4_Y_W4_ENC, 288 SM_RESPONDER_PH4_LTK_GET_ENC, 289 SM_RESPONDER_PH4_LTK_W4_ENC, 290 SM_RESPONDER_PH4_SEND_LTK, 291 292 // INITITIATOR ROLE 293 // state = 51 294 SM_INITIATOR_CONNECTED, 295 SM_INITIATOR_PH0_HAS_LTK, 296 SM_INITIATOR_PH0_SEND_START_ENCRYPTION, 297 SM_INITIATOR_PH0_W4_CONNECTION_ENCRYPTED, 298 SM_INITIATOR_PH1_W2_SEND_PAIRING_REQUEST, 299 SM_INITIATOR_PH1_SEND_PAIRING_REQUEST, 300 SM_INITIATOR_PH1_W4_PAIRING_RESPONSE, 301 SM_INITIATOR_PH2_W4_PAIRING_CONFIRM, 302 SM_INITIATOR_PH2_W4_PAIRING_RANDOM, 303 SM_INITIATOR_PH3_SEND_START_ENCRYPTION, 304 305 } security_manager_state_t; 306 307 typedef enum { 308 IRK_LOOKUP_IDLE, 309 IRK_LOOKUP_W4_READY, 310 IRK_LOOKUP_STARTED, 311 IRK_LOOKUP_SUCCEEDED, 312 IRK_LOOKUP_FAILED 313 } irk_lookup_state_t; 314 315 // Authorization state 316 typedef enum { 317 AUTHORIZATION_UNKNOWN, 318 AUTHORIZATION_PENDING, 319 AUTHORIZATION_DECLINED, 320 AUTHORIZATION_GRANTED 321 } authorization_state_t; 322 323 typedef struct sm_pairing_packet { 324 uint8_t code; 325 uint8_t io_capability; 326 uint8_t oob_data_flag; 327 uint8_t auth_req; 328 uint8_t max_encryption_key_size; 329 uint8_t initiator_key_distribution; 330 uint8_t responder_key_distribution; 331 } sm_pairing_packet_t; 332 333 // connection info available as long as connection exists 334 typedef struct sm_connection { 335 hci_con_handle_t sm_handle; 336 uint8_t sm_role; // 0 - IamMaster, 1 = IamSlave 337 uint8_t sm_security_request_received; 338 uint8_t sm_bonding_requested; 339 uint8_t sm_peer_addr_type; 340 bd_addr_t sm_peer_address; 341 security_manager_state_t sm_engine_state; 342 irk_lookup_state_t sm_irk_lookup_state; 343 uint8_t sm_connection_encrypted; 344 uint8_t sm_connection_authenticated; // [0..1] 345 uint8_t sm_actual_encryption_key_size; 346 sm_pairing_packet_t sm_m_preq; // only used during c1 347 authorization_state_t sm_connection_authorization_state; 348 uint16_t sm_local_ediv; 349 uint8_t sm_local_rand[8]; 350 int sm_le_db_index; 351 } sm_connection_t; 352 353 typedef struct { 354 // linked list - assert: first field 355 btstack_linked_item_t item; 356 357 // remote side 358 bd_addr_t address; 359 360 // module handle 361 hci_con_handle_t con_handle; 362 363 // le public, le random, classic 364 bd_addr_type_t address_type; 365 366 // role: 0 - master, 1 - slave 367 uint8_t role; 368 369 // connection state 370 CONNECTION_STATE state; 371 372 // bonding 373 uint16_t bonding_flags; 374 uint8_t bonding_status; 375 // requested security level 376 gap_security_level_t requested_security_level; 377 378 // 379 link_key_type_t link_key_type; 380 381 // remote supported features 382 uint8_t remote_supported_feature_eSCO; 383 384 // errands 385 uint32_t authentication_flags; 386 387 btstack_timer_source_t timeout; 388 389 // timeout in system ticks (HAVE_EMBEDDED_TICK) or milliseconds (HAVE_EMBEDDED_TIME_MS) 390 uint32_t timestamp; 391 392 // ACL packet recombination - PRE_BUFFER + ACL Header + ACL payload 393 uint8_t acl_recombination_buffer[HCI_INCOMING_PRE_BUFFER_SIZE + 4 + HCI_ACL_BUFFER_SIZE]; 394 uint16_t acl_recombination_pos; 395 uint16_t acl_recombination_length; 396 397 // number packets sent to controller 398 uint8_t num_acl_packets_sent; 399 uint8_t num_sco_packets_sent; 400 401 // LE Connection parameter update 402 le_con_parameter_update_state_t le_con_parameter_update_state; 403 uint8_t le_con_param_update_identifier; 404 uint16_t le_conn_interval_min; 405 uint16_t le_conn_interval_max; 406 uint16_t le_conn_latency; 407 uint16_t le_supervision_timeout; 408 409 #ifdef ENABLE_BLE 410 // LE Security Manager 411 sm_connection_t sm_connection; 412 #endif 413 414 } hci_connection_t; 415 416 417 /** 418 * HCI Inititizlization State Machine 419 */ 420 typedef enum hci_init_state{ 421 HCI_INIT_SEND_RESET = 0, 422 HCI_INIT_W4_SEND_RESET, 423 HCI_INIT_SEND_READ_LOCAL_VERSION_INFORMATION, 424 HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION, 425 426 HCI_INIT_SEND_BAUD_CHANGE, 427 HCI_INIT_W4_SEND_BAUD_CHANGE, 428 HCI_INIT_CUSTOM_INIT, 429 HCI_INIT_W4_CUSTOM_INIT, 430 HCI_INIT_SEND_RESET_CSR_WARM_BOOT, 431 HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT, 432 433 HCI_INIT_READ_LOCAL_SUPPORTED_COMMANDS, 434 HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS, 435 436 HCI_INIT_SEND_BAUD_CHANGE_BCM, 437 HCI_INIT_W4_SEND_BAUD_CHANGE_BCM, 438 439 HCI_INIT_SET_BD_ADDR, 440 HCI_INIT_W4_SET_BD_ADDR, 441 442 HCI_INIT_SEND_RESET_ST_WARM_BOOT, 443 HCI_INIT_W4_SEND_RESET_ST_WARM_BOOT, 444 445 HCI_INIT_READ_BD_ADDR, 446 HCI_INIT_W4_READ_BD_ADDR, 447 448 HCI_INIT_READ_BUFFER_SIZE, 449 HCI_INIT_W4_READ_BUFFER_SIZE, 450 HCI_INIT_READ_LOCAL_SUPPORTED_FEATURES, 451 HCI_INIT_W4_READ_LOCAL_SUPPORTED_FEATURES, 452 HCI_INIT_SET_EVENT_MASK, 453 HCI_INIT_W4_SET_EVENT_MASK, 454 HCI_INIT_WRITE_SIMPLE_PAIRING_MODE, 455 HCI_INIT_W4_WRITE_SIMPLE_PAIRING_MODE, 456 HCI_INIT_WRITE_PAGE_TIMEOUT, 457 HCI_INIT_W4_WRITE_PAGE_TIMEOUT, 458 HCI_INIT_WRITE_CLASS_OF_DEVICE, 459 HCI_INIT_W4_WRITE_CLASS_OF_DEVICE, 460 HCI_INIT_WRITE_LOCAL_NAME, 461 HCI_INIT_W4_WRITE_LOCAL_NAME, 462 HCI_INIT_WRITE_SCAN_ENABLE, 463 HCI_INIT_W4_WRITE_SCAN_ENABLE, 464 465 HCI_INIT_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE, 466 HCI_INIT_W4_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE, 467 468 HCI_INIT_LE_READ_BUFFER_SIZE, 469 HCI_INIT_W4_LE_READ_BUFFER_SIZE, 470 HCI_INIT_WRITE_LE_HOST_SUPPORTED, 471 HCI_INIT_W4_WRITE_LE_HOST_SUPPORTED, 472 HCI_INIT_READ_WHITE_LIST_SIZE, 473 HCI_INIT_W4_READ_WHITE_LIST_SIZE, 474 475 HCI_INIT_LE_SET_SCAN_PARAMETERS, 476 HCI_INIT_W4_LE_SET_SCAN_PARAMETERS, 477 478 HCI_INIT_DONE, 479 480 HCI_FALLING_ASLEEP_DISCONNECT, 481 HCI_FALLING_ASLEEP_W4_WRITE_SCAN_ENABLE, 482 HCI_FALLING_ASLEEP_COMPLETE, 483 484 HCI_INIT_AFTER_SLEEP 485 486 } hci_substate_t; 487 488 enum { 489 LE_ADVERTISEMENT_TASKS_DISABLE = 1 << 0, 490 LE_ADVERTISEMENT_TASKS_SET_ADV_DATA = 1 << 1, 491 LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA = 1 << 2, 492 LE_ADVERTISEMENT_TASKS_SET_PARAMS = 1 << 3, 493 LE_ADVERTISEMENT_TASKS_ENABLE = 1 << 4, 494 }; 495 496 enum { 497 LE_WHITELIST_ON_CONTROLLER = 1 << 0, 498 LE_WHITELIST_ADD_TO_CONTROLLER = 1 << 1, 499 LE_WHITELIST_REMOVE_FROM_CONTROLLER = 1 << 2, 500 }; 501 502 typedef struct { 503 btstack_linked_item_t item; 504 bd_addr_t address; 505 bd_addr_type_t address_type; 506 uint8_t state; 507 } whitelist_entry_t; 508 509 /** 510 * main data structure 511 */ 512 typedef struct { 513 // transport component with configuration 514 const hci_transport_t * hci_transport; 515 const void * config; 516 517 // chipset driver 518 const btstack_chipset_t * chipset; 519 520 // hardware power controller 521 const btstack_control_t * control; 522 523 /* link key db */ 524 const btstack_link_key_db_t * link_key_db; 525 526 // list of existing baseband connections 527 btstack_linked_list_t connections; 528 529 /* callback to L2CAP layer */ 530 void (*acl_packet_handler)(uint8_t packet_type, uint8_t *packet, uint16_t size); 531 532 /* callback for SCO data */ 533 void (*sco_packet_handler)(uint8_t packet_type, uint8_t *packet, uint16_t size); 534 535 /* callbacks for events */ 536 btstack_linked_list_t event_handlers; 537 538 // local version information callback 539 void (*local_version_information_callback)(uint8_t * local_version_information); 540 541 // hardware error callback 542 void (*hardware_error_callback)(void); 543 544 // basic configuration 545 const char * local_name; 546 uint32_t class_of_device; 547 bd_addr_t local_bd_addr; 548 uint8_t ssp_enable; 549 uint8_t ssp_io_capability; 550 uint8_t ssp_authentication_requirement; 551 uint8_t ssp_auto_accept; 552 553 // single buffer for HCI packet assembly + additional prebuffer for H4 drivers 554 uint8_t hci_packet_buffer_prefix[HCI_OUTGOING_PRE_BUFFER_SIZE]; 555 uint8_t hci_packet_buffer[HCI_PACKET_BUFFER_SIZE]; // opcode (16), len(8) 556 uint8_t hci_packet_buffer_reserved; 557 uint16_t acl_fragmentation_pos; 558 uint16_t acl_fragmentation_total_size; 559 560 /* host to controller flow control */ 561 uint8_t num_cmd_packets; 562 uint8_t acl_packets_total_num; 563 uint16_t acl_data_packet_length; 564 uint8_t sco_packets_total_num; 565 uint8_t sco_data_packet_length; 566 uint8_t synchronous_flow_control_enabled; 567 uint8_t le_acl_packets_total_num; 568 uint16_t le_data_packets_length; 569 uint8_t sco_waiting_for_can_send_now; 570 571 /* local supported features */ 572 uint8_t local_supported_features[8]; 573 574 /* local supported commands summary - complete info is 64 bytes */ 575 /* 0 - read buffer size */ 576 /* 1 - write le host supported */ 577 uint8_t local_supported_commands[1]; 578 579 /* bluetooth device information from hci read local version information */ 580 // uint16_t hci_version; 581 // uint16_t hci_revision; 582 // uint16_t lmp_version; 583 uint16_t manufacturer; 584 // uint16_t lmp_subversion; 585 586 // usable packet types given acl_data_packet_length and HCI_ACL_BUFFER_SIZE 587 uint16_t packet_types; 588 589 590 /* hci state machine */ 591 HCI_STATE state; 592 hci_substate_t substate; 593 btstack_timer_source_t timeout; 594 uint8_t cmds_ready; 595 596 uint16_t last_cmd_opcode; 597 598 uint8_t discoverable; 599 uint8_t connectable; 600 uint8_t bondable; 601 602 /* buffer for scan enable cmd - 0xff no change */ 603 uint8_t new_scan_enable_value; 604 605 uint16_t sco_voice_setting; 606 607 uint8_t loopback_mode; 608 609 // buffer for single connection decline 610 uint8_t decline_reason; 611 bd_addr_t decline_addr; 612 613 uint8_t adv_addr_type; 614 bd_addr_t adv_address; 615 616 le_scanning_state_t le_scanning_state; 617 le_connecting_state_t le_connecting_state; 618 619 // buffer for le scan type command - 0xff not set 620 uint8_t le_scan_type; 621 uint16_t le_scan_interval; 622 uint16_t le_scan_window; 623 624 le_connection_parameter_range_t le_connection_parameter_range; 625 626 uint8_t * le_advertisements_data; 627 uint8_t le_advertisements_data_len; 628 629 uint8_t * le_scan_response_data; 630 uint8_t le_scan_response_data_len; 631 632 uint8_t le_advertisements_active; 633 uint8_t le_advertisements_enabled; 634 uint8_t le_advertisements_todo; 635 636 uint16_t le_advertisements_interval_min; 637 uint16_t le_advertisements_interval_max; 638 uint8_t le_advertisements_type; 639 uint8_t le_advertisements_own_address_type; 640 uint8_t le_advertisements_direct_address_type; 641 uint8_t le_advertisements_channel_map; 642 uint8_t le_advertisements_filter_policy; 643 bd_addr_t le_advertisements_direct_address; 644 645 // LE Whitelist Management 646 uint16_t le_whitelist_capacity; 647 btstack_linked_list_t le_whitelist; 648 649 // custom BD ADDR 650 bd_addr_t custom_bd_addr; 651 uint8_t custom_bd_addr_set; 652 653 } hci_stack_t; 654 655 656 /* API_START */ 657 658 659 // HCI init and configuration 660 661 662 /** 663 * @brief Set up HCI. Needs to be called before any other function. 664 */ 665 void hci_init(const hci_transport_t *transport, const void *config); 666 667 /** 668 * @brief Configure Bluetooth chipset driver. Has to be called before power on, or right after receiving the local version information. 669 */ 670 void hci_set_chipset(const btstack_chipset_t *chipset_driver); 671 672 /** 673 * @brief Configure Bluetooth hardware control. Has to be called before power on. 674 */ 675 void hci_set_control(const btstack_control_t *hardware_control); 676 677 /** 678 * @brief Configure Bluetooth hardware control. Has to be called before power on. 679 */ 680 void hci_set_link_key_db(btstack_link_key_db_t const * link_key_db); 681 682 /** 683 * @brief Set callback for Bluetooth Hardware Error 684 */ 685 void hci_set_hardware_error_callback(void (*fn)(void)); 686 687 /** 688 * @brief Set callback for local information from Bluetooth controller right after HCI Reset 689 * @note Can be used to select chipset driver dynamically during startup 690 */ 691 void hci_set_local_version_information_callback(void (*fn)(uint8_t * local_version_information)); 692 693 /** 694 * @brief Set Public BD ADDR - passed on to Bluetooth chipset during init if supported in bt_control_h 695 */ 696 void hci_set_bd_addr(bd_addr_t addr); 697 698 /** 699 * @brief Configure Voice Setting for use with SCO data in HSP/HFP 700 */ 701 void hci_set_sco_voice_setting(uint16_t voice_setting); 702 703 /** 704 * @brief Get SCO Voice Setting 705 * @return current voice setting 706 */ 707 uint16_t hci_get_sco_voice_setting(void); 708 709 /** 710 * @brief Requests the change of BTstack power mode. 711 */ 712 int hci_power_control(HCI_POWER_MODE mode); 713 714 /** 715 * @brief Shutdown HCI 716 */ 717 void hci_close(void); 718 719 720 // Callback registration 721 722 723 /** 724 * @brief Add event packet handler. 725 */ 726 void hci_add_event_handler(btstack_packet_callback_registration_t * callback_handler); 727 728 /** 729 * @brief Registers a packet handler for ACL data. Used by L2CAP 730 */ 731 void hci_register_acl_packet_handler(void (*handler)(uint8_t packet_type, uint8_t *packet, uint16_t size)); 732 733 /** 734 * @brief Registers a packet handler for SCO data. Used for HSP and HFP profiles. 735 */ 736 void hci_register_sco_packet_handler(void (*handler)(uint8_t packet_type, uint8_t *packet, uint16_t size)); 737 738 739 // Sending HCI Commands 740 741 /** 742 * @brief Check if CMD packet can be sent to controller 743 */ 744 int hci_can_send_command_packet_now(void); 745 746 /** 747 * @brief Creates and sends HCI command packets based on a template and a list of parameters. Will return error if outgoing data buffer is occupied. 748 */ 749 int hci_send_cmd(const hci_cmd_t *cmd, ...); 750 751 752 // Sending SCO Packets 753 754 /** @brief Get SCO packet length for current SCO Voice setting 755 * @note Using SCO packets of the exact length is required for USB transfer 756 * @return Length of SCO packets in bytes (not audio frames) incl. 3 byte header 757 */ 758 int hci_get_sco_packet_length(void); 759 760 /** 761 * @brief Check hci packet buffer and if SCO packet can be sent to controller 762 */ 763 int hci_can_send_sco_packet_now(void); 764 765 /** 766 * @brief Check if SCO packet can be sent to controller 767 */ 768 int hci_can_send_prepared_sco_packet_now(void); 769 770 /** 771 * @brief Send SCO packet prepared in hci packet buffer 772 */ 773 int hci_send_sco_packet_buffer(int size); 774 775 776 // Outgoing packet buffer, also used for SCO packets 777 // see hci_can_send_prepared_sco_packet_now amn hci_send_sco_packet_buffer 778 779 /** 780 * Reserves outgoing packet buffer. 781 * @return 1 on success 782 */ 783 int hci_reserve_packet_buffer(void); 784 785 /** 786 * Get pointer for outgoing packet buffer 787 */ 788 uint8_t* hci_get_outgoing_packet_buffer(void); 789 790 /** 791 * Release outgoing packet buffer\ 792 * @note only called instead of hci_send_preparared 793 */ 794 void hci_release_packet_buffer(void); 795 796 797 /* API_END */ 798 799 800 801 /** 802 * Get connection iterator. Only used by l2cap.c and sm.c 803 */ 804 void hci_connections_get_iterator(btstack_linked_list_iterator_t *it); 805 806 /** 807 * Get internal hci_connection_t for given handle. Used by L2CAP, SM, daemon 808 */ 809 hci_connection_t * hci_connection_for_handle(hci_con_handle_t con_handle); 810 811 /** 812 * Get internal hci_connection_t for given Bluetooth addres. Called by L2CAP 813 */ 814 hci_connection_t * hci_connection_for_bd_addr_and_type(bd_addr_t addr, bd_addr_type_t addr_type); 815 816 /** 817 * Check if outgoing packet buffer is reserved. Used for internal checks in l2cap.c 818 */ 819 int hci_is_packet_buffer_reserved(void); 820 821 /** 822 * Check hci packet buffer is free and a classic acl packet can be sent to controller 823 */ 824 int hci_can_send_acl_classic_packet_now(void); 825 826 /** 827 * Check hci packet buffer is free and an LE acl packet can be sent to controller 828 */ 829 int hci_can_send_acl_le_packet_now(void); 830 831 /** 832 * Check hci packet buffer is free and an acl packet for the given handle can be sent to controller 833 */ 834 int hci_can_send_acl_packet_now(hci_con_handle_t con_handle); 835 836 /** 837 * Check if acl packet for the given handle can be sent to controller 838 */ 839 int hci_can_send_prepared_acl_packet_now(hci_con_handle_t con_handle); 840 841 /** 842 * Send acl packet prepared in hci packet buffer 843 */ 844 int hci_send_acl_packet_buffer(int size); 845 846 /** 847 * Check if authentication is active. It delays automatic disconnect while no L2CAP connection 848 * Called by l2cap. 849 */ 850 int hci_authentication_active_for_handle(hci_con_handle_t handle); 851 852 /** 853 * Get maximal ACL Classic data packet length based on used buffer size. Called by L2CAP 854 */ 855 uint16_t hci_max_acl_data_packet_length(void); 856 857 /** 858 * Get supported packet types. Called by L2CAP 859 */ 860 uint16_t hci_usable_acl_packet_types(void); 861 862 /** 863 * Check if ACL packets marked as non flushable can be sent. Called by L2CAP 864 */ 865 int hci_non_flushable_packet_boundary_flag_supported(void); 866 867 /** 868 * Check if SSP is supported on both sides. Called by L2CAP 869 */ 870 int gap_ssp_supported_on_both_sides(hci_con_handle_t handle); 871 872 /** 873 * Disconn because of security block. Called by L2CAP 874 */ 875 void hci_disconnect_security_block(hci_con_handle_t con_handle); 876 877 /** 878 * Query if remote side supports eSCO 879 */ 880 int hci_remote_esco_supported(hci_con_handle_t con_handle); 881 882 /** 883 * Emit current HCI state. Called by daemon 884 */ 885 void hci_emit_state(void); 886 887 /** 888 * Send complete CMD packet. Called by daemon 889 */ 890 int hci_send_cmd_packet(uint8_t *packet, int size); 891 892 /** 893 * Disconnect all HCI connections. Called by daemon 894 */ 895 void hci_disconnect_all(void); 896 897 /** 898 * Get number of free acl slots for packets of given handle. Called by daemon 899 */ 900 int hci_number_free_acl_slots_for_handle(hci_con_handle_t con_handle); 901 902 /** 903 * @brief Set Advertisement Parameters 904 * @param adv_int_min 905 * @param adv_int_max 906 * @param adv_type 907 * @param own_address_type 908 * @param direct_address_type 909 * @param direct_address 910 * @param channel_map 911 * @param filter_policy 912 * 913 * @note internal use. use gap_advertisements_set_params from gap_le.h instead. 914 */ 915 void hci_le_advertisements_set_params(uint16_t adv_int_min, uint16_t adv_int_max, uint8_t adv_type, 916 uint8_t own_address_type, uint8_t direct_address_typ, bd_addr_t direct_address, 917 uint8_t channel_map, uint8_t filter_policy); 918 919 920 // Only for PTS testing 921 922 /** 923 * Disable automatic L2CAP disconnect if no L2CAP connection is established 924 */ 925 void hci_disable_l2cap_timeout_check(void); 926 927 #if defined __cplusplus 928 } 929 #endif 930 931 #endif // __HCI_H 932