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_REQUEST, 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_REPLY, 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 // LE Secure Connections 306 SM_SC_RECEIVED_LTK_REQUEST, 307 SM_SC_SEND_LTK_REQUESTED_NEGATIVE_REPLY, 308 SM_SC_SEND_PUBLIC_KEY_COMMAND, 309 SM_SC_W4_PUBLIC_KEY_COMMAND, 310 SM_SC_W2_GET_RANDOM_A, 311 SM_SC_W4_GET_RANDOM_A, 312 SM_SC_W2_GET_RANDOM_B, 313 SM_SC_W4_GET_RANDOM_B, 314 SM_SC_W2_CMAC_FOR_CONFIRMATION, 315 SM_SC_W4_CMAC_FOR_CONFIRMATION, 316 SM_SC_SEND_CONFIRMATION, 317 SM_SC_W2_CMAC_FOR_CHECK_CONFIRMATION, 318 SM_SC_W4_CMAC_FOR_CHECK_CONFIRMATION, 319 SM_SC_W4_CONFIRMATION, 320 SM_SC_SEND_PAIRING_RANDOM, 321 SM_SC_W4_PAIRING_RANDOM, 322 SM_SC_W2_CALCULATE_G2, 323 SM_SC_W4_CALCULATE_G2, 324 SM_SC_W2_CALCULATE_F5_SALT, 325 SM_SC_W4_CALCULATE_F5_SALT, 326 SM_SC_W2_CALCULATE_F5_MACKEY, 327 SM_SC_W4_CALCULATE_F5_MACKEY, 328 SM_SC_W2_CALCULATE_F5_LTK, 329 SM_SC_W4_CALCULATE_F5_LTK, 330 SM_SC_W2_CALCULATE_F6_FOR_DHKEY_CHECK, 331 SM_SC_W4_CALCULATE_F6_FOR_DHKEY_CHECK, 332 SM_SC_W2_CALCULATE_F6_TO_VERIFY_DHKEY_CHECK, 333 SM_SC_W4_CALCULATE_F6_TO_VERIFY_DHKEY_CHECK, 334 SM_SC_W4_USER_RESPONSE, 335 SM_SC_SEND_DHKEY_CHECK_COMMAND, 336 SM_SC_W4_DHKEY_CHECK_COMMAND, 337 SM_SC_W4_LTK_REQUEST_SC, 338 SM_SC_W2_CALCULATE_H6_ILK, 339 SM_SC_W4_CALCULATE_H6_ILK, 340 SM_SC_W2_CALCULATE_H6_BR_EDR_LINK_KEY, 341 SM_SC_W4_CALCULATE_H6_BR_EDR_LINK_KEY, 342 } security_manager_state_t; 343 344 typedef enum { 345 IRK_LOOKUP_IDLE, 346 IRK_LOOKUP_W4_READY, 347 IRK_LOOKUP_STARTED, 348 IRK_LOOKUP_SUCCEEDED, 349 IRK_LOOKUP_FAILED 350 } irk_lookup_state_t; 351 352 // Authorization state 353 typedef enum { 354 AUTHORIZATION_UNKNOWN, 355 AUTHORIZATION_PENDING, 356 AUTHORIZATION_DECLINED, 357 AUTHORIZATION_GRANTED 358 } authorization_state_t; 359 360 typedef uint8_t sm_pairing_packet_t[7]; 361 362 // connection info available as long as connection exists 363 typedef struct sm_connection { 364 hci_con_handle_t sm_handle; 365 uint8_t sm_role; // 0 - IamMaster, 1 = IamSlave 366 uint8_t sm_security_request_received; 367 uint8_t sm_bonding_requested; 368 uint8_t sm_peer_addr_type; 369 bd_addr_t sm_peer_address; 370 security_manager_state_t sm_engine_state; 371 irk_lookup_state_t sm_irk_lookup_state; 372 uint8_t sm_connection_encrypted; 373 uint8_t sm_connection_authenticated; // [0..1] 374 uint8_t sm_actual_encryption_key_size; 375 sm_pairing_packet_t sm_m_preq; // only used during c1 376 authorization_state_t sm_connection_authorization_state; 377 uint16_t sm_local_ediv; 378 uint8_t sm_local_rand[8]; 379 int sm_le_db_index; 380 } sm_connection_t; 381 382 typedef struct { 383 // linked list - assert: first field 384 btstack_linked_item_t item; 385 386 // remote side 387 bd_addr_t address; 388 389 // module handle 390 hci_con_handle_t con_handle; 391 392 // le public, le random, classic 393 bd_addr_type_t address_type; 394 395 // role: 0 - master, 1 - slave 396 uint8_t role; 397 398 // connection state 399 CONNECTION_STATE state; 400 401 // bonding 402 uint16_t bonding_flags; 403 uint8_t bonding_status; 404 // requested security level 405 gap_security_level_t requested_security_level; 406 407 // 408 link_key_type_t link_key_type; 409 410 // remote supported features 411 uint8_t remote_supported_feature_eSCO; 412 413 // errands 414 uint32_t authentication_flags; 415 416 btstack_timer_source_t timeout; 417 418 // timeout in system ticks (HAVE_EMBEDDED_TICK) or milliseconds (HAVE_EMBEDDED_TIME_MS) 419 uint32_t timestamp; 420 421 // ACL packet recombination - PRE_BUFFER + ACL Header + ACL payload 422 uint8_t acl_recombination_buffer[HCI_INCOMING_PRE_BUFFER_SIZE + 4 + HCI_ACL_BUFFER_SIZE]; 423 uint16_t acl_recombination_pos; 424 uint16_t acl_recombination_length; 425 426 // number packets sent to controller 427 uint8_t num_acl_packets_sent; 428 uint8_t num_sco_packets_sent; 429 430 // LE Connection parameter update 431 le_con_parameter_update_state_t le_con_parameter_update_state; 432 uint8_t le_con_param_update_identifier; 433 uint16_t le_conn_interval_min; 434 uint16_t le_conn_interval_max; 435 uint16_t le_conn_latency; 436 uint16_t le_supervision_timeout; 437 438 #ifdef ENABLE_BLE 439 // LE Security Manager 440 sm_connection_t sm_connection; 441 #endif 442 443 } hci_connection_t; 444 445 446 /** 447 * HCI Inititizlization State Machine 448 */ 449 typedef enum hci_init_state{ 450 HCI_INIT_SEND_RESET = 0, 451 HCI_INIT_W4_SEND_RESET, 452 HCI_INIT_SEND_READ_LOCAL_VERSION_INFORMATION, 453 HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION, 454 455 HCI_INIT_SEND_BAUD_CHANGE, 456 HCI_INIT_W4_SEND_BAUD_CHANGE, 457 HCI_INIT_CUSTOM_INIT, 458 HCI_INIT_W4_CUSTOM_INIT, 459 HCI_INIT_SEND_RESET_CSR_WARM_BOOT, 460 HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT, 461 HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT_LINK_RESET, 462 463 HCI_INIT_READ_LOCAL_SUPPORTED_COMMANDS, 464 HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS, 465 466 HCI_INIT_SEND_BAUD_CHANGE_BCM, 467 HCI_INIT_W4_SEND_BAUD_CHANGE_BCM, 468 469 HCI_INIT_SET_BD_ADDR, 470 HCI_INIT_W4_SET_BD_ADDR, 471 472 HCI_INIT_SEND_RESET_ST_WARM_BOOT, 473 HCI_INIT_W4_SEND_RESET_ST_WARM_BOOT, 474 475 HCI_INIT_READ_BD_ADDR, 476 HCI_INIT_W4_READ_BD_ADDR, 477 478 HCI_INIT_READ_BUFFER_SIZE, 479 HCI_INIT_W4_READ_BUFFER_SIZE, 480 HCI_INIT_READ_LOCAL_SUPPORTED_FEATURES, 481 HCI_INIT_W4_READ_LOCAL_SUPPORTED_FEATURES, 482 HCI_INIT_SET_EVENT_MASK, 483 HCI_INIT_W4_SET_EVENT_MASK, 484 HCI_INIT_WRITE_SIMPLE_PAIRING_MODE, 485 HCI_INIT_W4_WRITE_SIMPLE_PAIRING_MODE, 486 HCI_INIT_WRITE_PAGE_TIMEOUT, 487 HCI_INIT_W4_WRITE_PAGE_TIMEOUT, 488 HCI_INIT_WRITE_CLASS_OF_DEVICE, 489 HCI_INIT_W4_WRITE_CLASS_OF_DEVICE, 490 HCI_INIT_WRITE_LOCAL_NAME, 491 HCI_INIT_W4_WRITE_LOCAL_NAME, 492 HCI_INIT_WRITE_SCAN_ENABLE, 493 HCI_INIT_W4_WRITE_SCAN_ENABLE, 494 495 HCI_INIT_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE, 496 HCI_INIT_W4_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE, 497 HCI_INIT_WRITE_DEFAULT_ERRONEOUS_DATA_REPORTING, 498 HCI_INIT_W4_WRITE_DEFAULT_ERRONEOUS_DATA_REPORTING, 499 500 HCI_INIT_LE_READ_BUFFER_SIZE, 501 HCI_INIT_W4_LE_READ_BUFFER_SIZE, 502 HCI_INIT_WRITE_LE_HOST_SUPPORTED, 503 HCI_INIT_W4_WRITE_LE_HOST_SUPPORTED, 504 HCI_INIT_READ_WHITE_LIST_SIZE, 505 HCI_INIT_W4_READ_WHITE_LIST_SIZE, 506 507 HCI_INIT_LE_SET_SCAN_PARAMETERS, 508 HCI_INIT_W4_LE_SET_SCAN_PARAMETERS, 509 510 HCI_INIT_DONE, 511 512 HCI_FALLING_ASLEEP_DISCONNECT, 513 HCI_FALLING_ASLEEP_W4_WRITE_SCAN_ENABLE, 514 HCI_FALLING_ASLEEP_COMPLETE, 515 516 HCI_INIT_AFTER_SLEEP 517 518 } hci_substate_t; 519 520 enum { 521 LE_ADVERTISEMENT_TASKS_DISABLE = 1 << 0, 522 LE_ADVERTISEMENT_TASKS_SET_ADV_DATA = 1 << 1, 523 LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA = 1 << 2, 524 LE_ADVERTISEMENT_TASKS_SET_PARAMS = 1 << 3, 525 LE_ADVERTISEMENT_TASKS_ENABLE = 1 << 4, 526 }; 527 528 enum { 529 LE_WHITELIST_ON_CONTROLLER = 1 << 0, 530 LE_WHITELIST_ADD_TO_CONTROLLER = 1 << 1, 531 LE_WHITELIST_REMOVE_FROM_CONTROLLER = 1 << 2, 532 }; 533 534 typedef struct { 535 btstack_linked_item_t item; 536 bd_addr_t address; 537 bd_addr_type_t address_type; 538 uint8_t state; 539 } whitelist_entry_t; 540 541 /** 542 * main data structure 543 */ 544 typedef struct { 545 // transport component with configuration 546 const hci_transport_t * hci_transport; 547 const void * config; 548 549 // chipset driver 550 const btstack_chipset_t * chipset; 551 552 // hardware power controller 553 const btstack_control_t * control; 554 555 /* link key db */ 556 const btstack_link_key_db_t * link_key_db; 557 558 // list of existing baseband connections 559 btstack_linked_list_t connections; 560 561 /* callback to L2CAP layer */ 562 btstack_packet_handler_t acl_packet_handler; 563 564 /* callback for SCO data */ 565 btstack_packet_handler_t sco_packet_handler; 566 567 /* callbacks for events */ 568 btstack_linked_list_t event_handlers; 569 570 // local version information callback 571 void (*local_version_information_callback)(uint8_t * local_version_information); 572 573 // hardware error callback 574 void (*hardware_error_callback)(uint8_t error); 575 576 // basic configuration 577 const char * local_name; 578 uint32_t class_of_device; 579 bd_addr_t local_bd_addr; 580 uint8_t ssp_enable; 581 uint8_t ssp_io_capability; 582 uint8_t ssp_authentication_requirement; 583 uint8_t ssp_auto_accept; 584 585 // single buffer for HCI packet assembly + additional prebuffer for H4 drivers 586 uint8_t * hci_packet_buffer; 587 uint8_t hci_packet_buffer_data[HCI_OUTGOING_PRE_BUFFER_SIZE + HCI_PACKET_BUFFER_SIZE]; 588 uint8_t hci_packet_buffer_reserved; 589 uint16_t acl_fragmentation_pos; 590 uint16_t acl_fragmentation_total_size; 591 592 /* host to controller flow control */ 593 uint8_t num_cmd_packets; 594 uint8_t acl_packets_total_num; 595 uint16_t acl_data_packet_length; 596 uint8_t sco_packets_total_num; 597 uint8_t sco_data_packet_length; 598 uint8_t synchronous_flow_control_enabled; 599 uint8_t le_acl_packets_total_num; 600 uint16_t le_data_packets_length; 601 uint8_t sco_waiting_for_can_send_now; 602 603 /* local supported features */ 604 uint8_t local_supported_features[8]; 605 606 /* local supported commands summary - complete info is 64 bytes */ 607 /* 0 - read buffer size */ 608 /* 1 - write le host supported */ 609 uint8_t local_supported_commands[1]; 610 611 /* bluetooth device information from hci read local version information */ 612 // uint16_t hci_version; 613 // uint16_t hci_revision; 614 // uint16_t lmp_version; 615 uint16_t manufacturer; 616 // uint16_t lmp_subversion; 617 618 // usable packet types given acl_data_packet_length and HCI_ACL_BUFFER_SIZE 619 uint16_t packet_types; 620 621 622 /* hci state machine */ 623 HCI_STATE state; 624 hci_substate_t substate; 625 btstack_timer_source_t timeout; 626 uint8_t cmds_ready; 627 628 uint16_t last_cmd_opcode; 629 630 uint8_t discoverable; 631 uint8_t connectable; 632 uint8_t bondable; 633 634 /* buffer for scan enable cmd - 0xff no change */ 635 uint8_t new_scan_enable_value; 636 637 uint16_t sco_voice_setting; 638 639 uint8_t loopback_mode; 640 641 // buffer for single connection decline 642 uint8_t decline_reason; 643 bd_addr_t decline_addr; 644 645 uint8_t adv_addr_type; 646 bd_addr_t adv_address; 647 648 le_scanning_state_t le_scanning_state; 649 le_connecting_state_t le_connecting_state; 650 651 // buffer for le scan type command - 0xff not set 652 uint8_t le_scan_type; 653 uint16_t le_scan_interval; 654 uint16_t le_scan_window; 655 656 le_connection_parameter_range_t le_connection_parameter_range; 657 658 uint8_t * le_advertisements_data; 659 uint8_t le_advertisements_data_len; 660 661 uint8_t * le_scan_response_data; 662 uint8_t le_scan_response_data_len; 663 664 uint8_t le_advertisements_active; 665 uint8_t le_advertisements_enabled; 666 uint8_t le_advertisements_todo; 667 668 uint16_t le_advertisements_interval_min; 669 uint16_t le_advertisements_interval_max; 670 uint8_t le_advertisements_type; 671 uint8_t le_advertisements_own_address_type; 672 uint8_t le_advertisements_direct_address_type; 673 uint8_t le_advertisements_channel_map; 674 uint8_t le_advertisements_filter_policy; 675 bd_addr_t le_advertisements_direct_address; 676 677 // LE Whitelist Management 678 uint16_t le_whitelist_capacity; 679 btstack_linked_list_t le_whitelist; 680 681 // custom BD ADDR 682 bd_addr_t custom_bd_addr; 683 uint8_t custom_bd_addr_set; 684 685 } hci_stack_t; 686 687 688 /* API_START */ 689 690 691 // HCI init and configuration 692 693 694 /** 695 * @brief Set up HCI. Needs to be called before any other function. 696 */ 697 void hci_init(const hci_transport_t *transport, const void *config); 698 699 /** 700 * @brief Configure Bluetooth chipset driver. Has to be called before power on, or right after receiving the local version information. 701 */ 702 void hci_set_chipset(const btstack_chipset_t *chipset_driver); 703 704 /** 705 * @brief Configure Bluetooth hardware control. Has to be called before power on. 706 */ 707 void hci_set_control(const btstack_control_t *hardware_control); 708 709 /** 710 * @brief Configure Bluetooth hardware control. Has to be called before power on. 711 */ 712 void hci_set_link_key_db(btstack_link_key_db_t const * link_key_db); 713 714 /** 715 * @brief Set callback for Bluetooth Hardware Error 716 */ 717 void hci_set_hardware_error_callback(void (*fn)(uint8_t error)); 718 719 /** 720 * @brief Set callback for local information from Bluetooth controller right after HCI Reset 721 * @note Can be used to select chipset driver dynamically during startup 722 */ 723 void hci_set_local_version_information_callback(void (*fn)(uint8_t * local_version_information)); 724 725 /** 726 * @brief Set Public BD ADDR - passed on to Bluetooth chipset during init if supported in bt_control_h 727 */ 728 void hci_set_bd_addr(bd_addr_t addr); 729 730 /** 731 * @brief Configure Voice Setting for use with SCO data in HSP/HFP 732 */ 733 void hci_set_sco_voice_setting(uint16_t voice_setting); 734 735 /** 736 * @brief Get SCO Voice Setting 737 * @return current voice setting 738 */ 739 uint16_t hci_get_sco_voice_setting(void); 740 741 /** 742 * @brief Requests the change of BTstack power mode. 743 */ 744 int hci_power_control(HCI_POWER_MODE mode); 745 746 /** 747 * @brief Shutdown HCI 748 */ 749 void hci_close(void); 750 751 752 // Callback registration 753 754 755 /** 756 * @brief Add event packet handler. 757 */ 758 void hci_add_event_handler(btstack_packet_callback_registration_t * callback_handler); 759 760 /** 761 * @brief Registers a packet handler for ACL data. Used by L2CAP 762 */ 763 void hci_register_acl_packet_handler(btstack_packet_handler_t handler); 764 765 /** 766 * @brief Registers a packet handler for SCO data. Used for HSP and HFP profiles. 767 */ 768 void hci_register_sco_packet_handler(btstack_packet_handler_t handler); 769 770 771 // Sending HCI Commands 772 773 /** 774 * @brief Check if CMD packet can be sent to controller 775 */ 776 int hci_can_send_command_packet_now(void); 777 778 /** 779 * @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. 780 */ 781 int hci_send_cmd(const hci_cmd_t *cmd, ...); 782 783 784 // Sending SCO Packets 785 786 /** @brief Get SCO packet length for current SCO Voice setting 787 * @note Using SCO packets of the exact length is required for USB transfer 788 * @return Length of SCO packets in bytes (not audio frames) incl. 3 byte header 789 */ 790 int hci_get_sco_packet_length(void); 791 792 /** 793 * @brief Request emission of HCI_EVENT_SCO_CAN_SEND_NOW as soon as possible 794 * @note HCI_EVENT_SCO_CAN_SEND_NOW might be emitted during call to this function 795 * so packet handler should be ready to handle it 796 */ 797 void hci_request_sco_can_send_now_event(void); 798 799 /** 800 * @brief Check HCI packet buffer and if SCO packet can be sent to controller 801 */ 802 int hci_can_send_sco_packet_now(void); 803 804 /** 805 * @brief Check if SCO packet can be sent to controller 806 */ 807 int hci_can_send_prepared_sco_packet_now(void); 808 809 /** 810 * @brief Send SCO packet prepared in HCI packet buffer 811 */ 812 int hci_send_sco_packet_buffer(int size); 813 814 815 // Outgoing packet buffer, also used for SCO packets 816 // see hci_can_send_prepared_sco_packet_now amn hci_send_sco_packet_buffer 817 818 /** 819 * Reserves outgoing packet buffer. 820 * @return 1 on success 821 */ 822 int hci_reserve_packet_buffer(void); 823 824 /** 825 * Get pointer for outgoing packet buffer 826 */ 827 uint8_t* hci_get_outgoing_packet_buffer(void); 828 829 /** 830 * Release outgoing packet buffer\ 831 * @note only called instead of hci_send_preparared 832 */ 833 void hci_release_packet_buffer(void); 834 835 836 /* API_END */ 837 838 839 840 /** 841 * Get connection iterator. Only used by l2cap.c and sm.c 842 */ 843 void hci_connections_get_iterator(btstack_linked_list_iterator_t *it); 844 845 /** 846 * Get internal hci_connection_t for given handle. Used by L2CAP, SM, daemon 847 */ 848 hci_connection_t * hci_connection_for_handle(hci_con_handle_t con_handle); 849 850 /** 851 * Get internal hci_connection_t for given Bluetooth addres. Called by L2CAP 852 */ 853 hci_connection_t * hci_connection_for_bd_addr_and_type(bd_addr_t addr, bd_addr_type_t addr_type); 854 855 /** 856 * Check if outgoing packet buffer is reserved. Used for internal checks in l2cap.c 857 */ 858 int hci_is_packet_buffer_reserved(void); 859 860 /** 861 * Check hci packet buffer is free and a classic acl packet can be sent to controller 862 */ 863 int hci_can_send_acl_classic_packet_now(void); 864 865 /** 866 * Check hci packet buffer is free and an LE acl packet can be sent to controller 867 */ 868 int hci_can_send_acl_le_packet_now(void); 869 870 /** 871 * Check hci packet buffer is free and an acl packet for the given handle can be sent to controller 872 */ 873 int hci_can_send_acl_packet_now(hci_con_handle_t con_handle); 874 875 /** 876 * Check if acl packet for the given handle can be sent to controller 877 */ 878 int hci_can_send_prepared_acl_packet_now(hci_con_handle_t con_handle); 879 880 /** 881 * Send acl packet prepared in hci packet buffer 882 */ 883 int hci_send_acl_packet_buffer(int size); 884 885 /** 886 * Check if authentication is active. It delays automatic disconnect while no L2CAP connection 887 * Called by l2cap. 888 */ 889 int hci_authentication_active_for_handle(hci_con_handle_t handle); 890 891 /** 892 * Get maximal ACL Classic data packet length based on used buffer size. Called by L2CAP 893 */ 894 uint16_t hci_max_acl_data_packet_length(void); 895 896 /** 897 * Get supported packet types. Called by L2CAP 898 */ 899 uint16_t hci_usable_acl_packet_types(void); 900 901 /** 902 * Check if ACL packets marked as non flushable can be sent. Called by L2CAP 903 */ 904 int hci_non_flushable_packet_boundary_flag_supported(void); 905 906 /** 907 * Check if extended SCO Link is supported 908 */ 909 int hci_extended_sco_link_supported(void); 910 911 /** 912 * Check if SSP is supported on both sides. Called by L2CAP 913 */ 914 int gap_ssp_supported_on_both_sides(hci_con_handle_t handle); 915 916 /** 917 * Disconn because of security block. Called by L2CAP 918 */ 919 void hci_disconnect_security_block(hci_con_handle_t con_handle); 920 921 /** 922 * Query if remote side supports eSCO 923 */ 924 int hci_remote_esco_supported(hci_con_handle_t con_handle); 925 926 /** 927 * Emit current HCI state. Called by daemon 928 */ 929 void hci_emit_state(void); 930 931 /** 932 * Send complete CMD packet. Called by daemon 933 */ 934 int hci_send_cmd_packet(uint8_t *packet, int size); 935 936 /** 937 * Disconnect all HCI connections. Called by daemon 938 */ 939 void hci_disconnect_all(void); 940 941 /** 942 * Get number of free acl slots for packets of given handle. Called by daemon 943 */ 944 int hci_number_free_acl_slots_for_handle(hci_con_handle_t con_handle); 945 946 /** 947 * @brief Set Advertisement Parameters 948 * @param adv_int_min 949 * @param adv_int_max 950 * @param adv_type 951 * @param own_address_type 952 * @param direct_address_type 953 * @param direct_address 954 * @param channel_map 955 * @param filter_policy 956 * 957 * @note internal use. use gap_advertisements_set_params from gap_le.h instead. 958 */ 959 void hci_le_advertisements_set_params(uint16_t adv_int_min, uint16_t adv_int_max, uint8_t adv_type, 960 uint8_t own_address_type, uint8_t direct_address_typ, bd_addr_t direct_address, 961 uint8_t channel_map, uint8_t filter_policy); 962 963 964 // Only for PTS testing 965 966 /** 967 * Disable automatic L2CAP disconnect if no L2CAP connection is established 968 */ 969 void hci_disable_l2cap_timeout_check(void); 970 971 #if defined __cplusplus 972 } 973 #endif 974 975 #endif // __HCI_H 976