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 BLUEKITCHEN 24 * GMBH 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 #define BTSTACK_FILE__ "hci.c" 39 40 /* 41 * hci.c 42 * 43 * Created by Matthias Ringwald on 4/29/09. 44 * 45 */ 46 47 #include "btstack_config.h" 48 49 50 #ifdef ENABLE_CLASSIC 51 #ifdef HAVE_EMBEDDED_TICK 52 #include "btstack_run_loop_embedded.h" 53 #endif 54 #endif 55 56 #ifdef ENABLE_BLE 57 #include "gap.h" 58 #include "ble/le_device_db.h" 59 #endif 60 61 #include <stdarg.h> 62 #include <string.h> 63 #include <inttypes.h> 64 65 #include "btstack_debug.h" 66 #include "btstack_event.h" 67 #include "btstack_linked_list.h" 68 #include "btstack_memory.h" 69 #include "bluetooth_company_id.h" 70 #include "bluetooth_data_types.h" 71 #include "gap.h" 72 #include "hci.h" 73 #include "hci_cmd.h" 74 #include "hci_dump.h" 75 #include "ad_parser.h" 76 77 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 78 #ifndef HCI_HOST_ACL_PACKET_NUM 79 #error "ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL requires to define HCI_HOST_ACL_PACKET_NUM" 80 #endif 81 #ifndef HCI_HOST_ACL_PACKET_LEN 82 #error "ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL requires to define HCI_HOST_ACL_PACKET_LEN" 83 #endif 84 #ifndef HCI_HOST_SCO_PACKET_NUM 85 #error "ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL requires to define HCI_HOST_SCO_PACKET_NUM" 86 #endif 87 #ifndef HCI_HOST_SCO_PACKET_LEN 88 #error "ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL requires to define HCI_HOST_SCO_PACKET_LEN" 89 #endif 90 #endif 91 92 #if defined(ENABLE_SCO_OVER_HCI) && defined(ENABLE_SCO_OVER_PCM) 93 #error "SCO data can either be routed over HCI or over PCM, but not over both. Please only enable ENABLE_SCO_OVER_HCI or ENABLE_SCO_OVER_PCM." 94 #endif 95 96 #if defined(ENABLE_SCO_OVER_HCI) && defined(HAVE_SCO_TRANSPORT) 97 #error "SCO data can either be routed over HCI or over PCM, but not over both. Please only enable ENABLE_SCO_OVER_HCI or HAVE_SCO_TRANSPORT." 98 #endif 99 100 #define HCI_CONNECTION_TIMEOUT_MS 10000 101 102 #ifndef HCI_RESET_RESEND_TIMEOUT_MS 103 #define HCI_RESET_RESEND_TIMEOUT_MS 200 104 #endif 105 106 // Names are arbitrarily shortened to 32 bytes if not requested otherwise 107 #ifndef GAP_INQUIRY_MAX_NAME_LEN 108 #define GAP_INQUIRY_MAX_NAME_LEN 32 109 #endif 110 111 // GAP inquiry state: 0 = off, 0x01 - 0x30 = requested duration, 0xfe = active, 0xff = stop requested 112 #define GAP_INQUIRY_DURATION_MIN 0x01 113 #define GAP_INQUIRY_DURATION_MAX 0x30 114 #define GAP_INQUIRY_STATE_IDLE 0x00 115 #define GAP_INQUIRY_STATE_W4_ACTIVE 0x80 116 #define GAP_INQUIRY_STATE_ACTIVE 0x81 117 #define GAP_INQUIRY_STATE_W2_CANCEL 0x82 118 #define GAP_INQUIRY_STATE_W4_CANCELLED 0x83 119 120 // GAP Remote Name Request 121 #define GAP_REMOTE_NAME_STATE_IDLE 0 122 #define GAP_REMOTE_NAME_STATE_W2_SEND 1 123 #define GAP_REMOTE_NAME_STATE_W4_COMPLETE 2 124 125 // GAP Pairing 126 #define GAP_PAIRING_STATE_IDLE 0 127 #define GAP_PAIRING_STATE_SEND_PIN 1 128 #define GAP_PAIRING_STATE_SEND_PIN_NEGATIVE 2 129 #define GAP_PAIRING_STATE_SEND_PASSKEY 3 130 #define GAP_PAIRING_STATE_SEND_PASSKEY_NEGATIVE 4 131 #define GAP_PAIRING_STATE_SEND_CONFIRMATION 5 132 #define GAP_PAIRING_STATE_SEND_CONFIRMATION_NEGATIVE 6 133 #define GAP_PAIRING_STATE_WAIT_FOR_COMMAND_COMPLETE 7 134 135 // 136 // compact storage of relevant supported HCI Commands. 137 // X-Macro below provides enumeration and mapping table into the supported 138 // commands bitmap (64 bytes) from HCI Read Local Supported Commands 139 // 140 141 // format: command name, byte offset, bit nr in 64-byte supported commands 142 #define SUPPORTED_HCI_COMMANDS \ 143 X( SUPPORTED_HCI_COMMAND_READ_REMOTE_EXTENDED_FEATURES , 2, 5) \ 144 X( SUPPORTED_HCI_COMMAND_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE , 10, 4) \ 145 X( SUPPORTED_HCI_COMMAND_READ_BUFFER_SIZE , 14, 7) \ 146 X( SUPPORTED_HCI_COMMAND_WRITE_DEFAULT_ERRONEOUS_DATA_REPORTING, 18, 3) \ 147 X( SUPPORTED_HCI_COMMAND_READ_ENCRYPTION_KEY_SIZE , 20, 4) \ 148 X( SUPPORTED_HCI_COMMAND_WRITE_LE_HOST_SUPPORTED , 24, 6) \ 149 X( SUPPORTED_HCI_COMMAND_REMOTE_OOB_EXTENDED_DATA_REQUEST_REPLY, 32, 1) \ 150 X( SUPPORTED_HCI_COMMAND_WRITE_SECURE_CONNECTIONS_HOST , 32, 3) \ 151 X( SUPPORTED_HCI_COMMAND_READ_LOCAL_OOB_EXTENDED_DATA_COMMAND , 32, 6) \ 152 X( SUPPORTED_HCI_COMMAND_LE_WRITE_SUGGESTED_DEFAULT_DATA_LENGTH, 34, 0) \ 153 X( SUPPORTED_HCI_COMMAND_LE_READ_MAXIMUM_DATA_LENGTH , 35, 3) \ 154 X( SUPPORTED_HCI_COMMAND_LE_SET_ADDRESS_RESOLUTION_ENABLE , 35, 1) \ 155 X( SUPPORTED_HCI_COMMAND_LE_SET_DEFAULT_PHY , 35, 5) \ 156 X( SUPPORTED_HCI_COMMAND_LE_SET_EXTENDED_ADVERTISING_ENABLE , 36, 6) \ 157 158 // enumerate supported commands 159 #define X(name, offset, bit) name, 160 enum { 161 SUPPORTED_HCI_COMMANDS 162 SUPPORTED_HCI_COMMANDS_COUNT 163 }; 164 #undef X 165 166 // assert supported hci commands bitmap fits into provided storage 167 #if SUPPORTED_HCI_COMMANDS_COUNT > 16 168 #error "Storage for supported HCI commands too small" 169 #endif 170 171 // prototypes 172 #ifdef ENABLE_CLASSIC 173 static void hci_update_scan_enable(void); 174 static void hci_emit_discoverable_enabled(uint8_t enabled); 175 static int hci_local_ssp_activated(void); 176 static bool hci_remote_ssp_supported(hci_con_handle_t con_handle); 177 static bool hci_ssp_supported(hci_connection_t * connection); 178 static void hci_notify_if_sco_can_send_now(void); 179 static void hci_emit_connection_complete(bd_addr_t address, hci_con_handle_t con_handle, uint8_t status); 180 static gap_security_level_t gap_security_level_for_connection(hci_connection_t * connection); 181 static void hci_emit_security_level(hci_con_handle_t con_handle, gap_security_level_t level); 182 static void hci_connection_timeout_handler(btstack_timer_source_t *timer); 183 static void hci_connection_timestamp(hci_connection_t *connection); 184 static void hci_emit_l2cap_check_timeout(hci_connection_t *conn); 185 static void gap_inquiry_explode(uint8_t *packet, uint16_t size); 186 #endif 187 188 static int hci_power_control_on(void); 189 static void hci_power_control_off(void); 190 static void hci_state_reset(void); 191 static void hci_halting_timeout_handler(btstack_timer_source_t * ds); 192 static void hci_emit_transport_packet_sent(void); 193 static void hci_emit_disconnection_complete(hci_con_handle_t con_handle, uint8_t reason); 194 static void hci_emit_nr_connections_changed(void); 195 static void hci_emit_hci_open_failed(void); 196 static void hci_emit_dedicated_bonding_result(bd_addr_t address, uint8_t status); 197 static void hci_emit_event(uint8_t * event, uint16_t size, int dump); 198 static void hci_emit_acl_packet(uint8_t * packet, uint16_t size); 199 static void hci_run(void); 200 static int hci_is_le_connection(hci_connection_t * connection); 201 202 #ifdef ENABLE_CLASSIC 203 static int hci_have_usb_transport(void); 204 static void hci_trigger_remote_features_for_connection(hci_connection_t * connection); 205 #endif 206 207 #ifdef ENABLE_BLE 208 #ifdef ENABLE_LE_CENTRAL 209 // called from test/ble_client/advertising_data_parser.c 210 void le_handle_advertisement_report(uint8_t *packet, uint16_t size); 211 static uint8_t hci_whitelist_remove(bd_addr_type_t address_type, const bd_addr_t address); 212 static void hci_whitelist_free(void); 213 static hci_connection_t * gap_get_outgoing_connection(void); 214 static bool hci_run_general_gap_le(void); 215 #endif 216 #ifdef ENABLE_LE_PERIPHERAL 217 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 218 static le_advertising_set_t * hci_advertising_set_for_handle(uint8_t advertising_handle); 219 #endif /* ENABLE_LE_EXTENDED_ADVERTISING */ 220 #endif /* ENABLE_LE_PERIPHERAL */ 221 #endif /* ENABLE_BLE */ 222 223 // the STACK is here 224 #ifndef HAVE_MALLOC 225 static hci_stack_t hci_stack_static; 226 #endif 227 static hci_stack_t * hci_stack = NULL; 228 229 #ifdef ENABLE_CLASSIC 230 // default name 231 static const char * default_classic_name = "BTstack 00:00:00:00:00:00"; 232 233 // test helper 234 static uint8_t disable_l2cap_timeouts = 0; 235 #endif 236 237 // reset connection state on create and on reconnect 238 // don't overwrite addr, con handle, role 239 static void hci_connection_init(hci_connection_t * conn){ 240 conn->authentication_flags = AUTH_FLAG_NONE; 241 conn->bonding_flags = 0; 242 conn->requested_security_level = LEVEL_0; 243 #ifdef ENABLE_CLASSIC 244 conn->request_role = HCI_ROLE_INVALID; 245 conn->sniff_subrating_max_latency = 0xffff; 246 conn->qos_service_type = HCI_SERVICE_TYPE_INVALID; 247 conn->link_key_type = INVALID_LINK_KEY; 248 btstack_run_loop_set_timer_handler(&conn->timeout, hci_connection_timeout_handler); 249 btstack_run_loop_set_timer_context(&conn->timeout, conn); 250 hci_connection_timestamp(conn); 251 #endif 252 conn->acl_recombination_length = 0; 253 conn->acl_recombination_pos = 0; 254 conn->num_packets_sent = 0; 255 256 conn->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NONE; 257 #ifdef ENABLE_BLE 258 conn->le_phy_update_all_phys = 0xff; 259 #endif 260 #ifdef ENABLE_LE_LIMIT_ACL_FRAGMENT_BY_MAX_OCTETS 261 conn->le_max_tx_octets = 27; 262 #endif 263 #ifdef ENABLE_CLASSIC_PAIRING_OOB 264 conn->classic_oob_c_192 = NULL; 265 conn->classic_oob_r_192 = NULL; 266 conn->classic_oob_c_256 = NULL; 267 conn->classic_oob_r_256 = NULL; 268 #endif 269 } 270 271 /** 272 * create connection for given address 273 * 274 * @return connection OR NULL, if no memory left 275 */ 276 static hci_connection_t * create_connection_for_bd_addr_and_type(const bd_addr_t addr, bd_addr_type_t addr_type){ 277 log_info("create_connection_for_addr %s, type %x", bd_addr_to_str(addr), addr_type); 278 279 hci_connection_t * conn = btstack_memory_hci_connection_get(); 280 if (!conn) return NULL; 281 hci_connection_init(conn); 282 283 bd_addr_copy(conn->address, addr); 284 conn->address_type = addr_type; 285 conn->con_handle = HCI_CON_HANDLE_INVALID; 286 conn->role = HCI_ROLE_INVALID; 287 288 btstack_linked_list_add(&hci_stack->connections, (btstack_linked_item_t *) conn); 289 290 return conn; 291 } 292 293 294 /** 295 * get le connection parameter range 296 * 297 * @return le connection parameter range struct 298 */ 299 void gap_get_connection_parameter_range(le_connection_parameter_range_t * range){ 300 *range = hci_stack->le_connection_parameter_range; 301 } 302 303 /** 304 * set le connection parameter range 305 * 306 */ 307 308 void gap_set_connection_parameter_range(le_connection_parameter_range_t *range){ 309 hci_stack->le_connection_parameter_range = *range; 310 } 311 312 /** 313 * @brief Test if connection parameters are inside in existing rage 314 * @param conn_interval_min (unit: 1.25ms) 315 * @param conn_interval_max (unit: 1.25ms) 316 * @param conn_latency 317 * @param supervision_timeout (unit: 10ms) 318 * @return 1 if included 319 */ 320 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){ 321 if (le_conn_interval_min < existing_range->le_conn_interval_min) return 0; 322 if (le_conn_interval_max > existing_range->le_conn_interval_max) return 0; 323 324 if (le_conn_latency < existing_range->le_conn_latency_min) return 0; 325 if (le_conn_latency > existing_range->le_conn_latency_max) return 0; 326 327 if (le_supervision_timeout < existing_range->le_supervision_timeout_min) return 0; 328 if (le_supervision_timeout > existing_range->le_supervision_timeout_max) return 0; 329 330 return 1; 331 } 332 333 /** 334 * @brief Set max number of connections in LE Peripheral role (if Bluetooth Controller supports it) 335 * @note: default: 1 336 * @param max_peripheral_connections 337 */ 338 #ifdef ENABLE_LE_PERIPHERAL 339 void gap_set_max_number_peripheral_connections(int max_peripheral_connections){ 340 hci_stack->le_max_number_peripheral_connections = max_peripheral_connections; 341 } 342 #endif 343 344 /** 345 * get hci connections iterator 346 * 347 * @return hci connections iterator 348 */ 349 350 void hci_connections_get_iterator(btstack_linked_list_iterator_t *it){ 351 btstack_linked_list_iterator_init(it, &hci_stack->connections); 352 } 353 354 /** 355 * get connection for a given handle 356 * 357 * @return connection OR NULL, if not found 358 */ 359 hci_connection_t * hci_connection_for_handle(hci_con_handle_t con_handle){ 360 btstack_linked_list_iterator_t it; 361 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 362 while (btstack_linked_list_iterator_has_next(&it)){ 363 hci_connection_t * item = (hci_connection_t *) btstack_linked_list_iterator_next(&it); 364 if ( item->con_handle == con_handle ) { 365 return item; 366 } 367 } 368 return NULL; 369 } 370 371 /** 372 * get connection for given address 373 * 374 * @return connection OR NULL, if not found 375 */ 376 hci_connection_t * hci_connection_for_bd_addr_and_type(const bd_addr_t addr, bd_addr_type_t addr_type){ 377 btstack_linked_list_iterator_t it; 378 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 379 while (btstack_linked_list_iterator_has_next(&it)){ 380 hci_connection_t * connection = (hci_connection_t *) btstack_linked_list_iterator_next(&it); 381 if (connection->address_type != addr_type) continue; 382 if (memcmp(addr, connection->address, 6) != 0) continue; 383 return connection; 384 } 385 return NULL; 386 } 387 388 inline static void connectionClearAuthenticationFlags(hci_connection_t * conn, hci_authentication_flags_t flags){ 389 conn->authentication_flags = (hci_authentication_flags_t)(conn->authentication_flags & ~flags); 390 } 391 392 inline static void connectionSetAuthenticationFlags(hci_connection_t * conn, hci_authentication_flags_t flags){ 393 conn->authentication_flags = (hci_authentication_flags_t)(conn->authentication_flags | flags); 394 } 395 396 #ifdef ENABLE_CLASSIC 397 398 #ifdef ENABLE_SCO_OVER_HCI 399 static int hci_number_sco_connections(void){ 400 int connections = 0; 401 btstack_linked_list_iterator_t it; 402 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 403 while (btstack_linked_list_iterator_has_next(&it)){ 404 hci_connection_t * connection = (hci_connection_t *) btstack_linked_list_iterator_next(&it); 405 if (connection->address_type != BD_ADDR_TYPE_SCO) continue; 406 connections++; 407 } 408 return connections; 409 } 410 #endif 411 412 static void hci_connection_timeout_handler(btstack_timer_source_t *timer){ 413 hci_connection_t * connection = (hci_connection_t *) btstack_run_loop_get_timer_context(timer); 414 #ifdef HAVE_EMBEDDED_TICK 415 if (btstack_run_loop_embedded_get_ticks() > connection->timestamp + btstack_run_loop_embedded_ticks_for_ms(HCI_CONNECTION_TIMEOUT_MS)){ 416 // connections might be timed out 417 hci_emit_l2cap_check_timeout(connection); 418 } 419 #else 420 if (btstack_run_loop_get_time_ms() > (connection->timestamp + HCI_CONNECTION_TIMEOUT_MS)){ 421 // connections might be timed out 422 hci_emit_l2cap_check_timeout(connection); 423 } 424 #endif 425 } 426 427 static void hci_connection_timestamp(hci_connection_t *connection){ 428 #ifdef HAVE_EMBEDDED_TICK 429 connection->timestamp = btstack_run_loop_embedded_get_ticks(); 430 #else 431 connection->timestamp = btstack_run_loop_get_time_ms(); 432 #endif 433 } 434 435 /** 436 * add authentication flags and reset timer 437 * @note: assumes classic connection 438 * @note: bd_addr is passed in as litle endian uint8_t * as it is called from parsing packets 439 */ 440 static void hci_add_connection_flags_for_flipped_bd_addr(uint8_t *bd_addr, hci_authentication_flags_t flags){ 441 bd_addr_t addr; 442 reverse_bd_addr(bd_addr, addr); 443 hci_connection_t * conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 444 if (conn) { 445 connectionSetAuthenticationFlags(conn, flags); 446 hci_connection_timestamp(conn); 447 } 448 } 449 450 static bool hci_pairing_active(hci_connection_t * hci_connection){ 451 return (hci_connection->authentication_flags & AUTH_FLAG_PAIRING_ACTIVE_MASK) != 0; 452 } 453 454 static void hci_pairing_started(hci_connection_t * hci_connection, bool ssp){ 455 if (hci_pairing_active(hci_connection)) return; 456 if (ssp){ 457 hci_connection->authentication_flags |= AUTH_FLAG_SSP_PAIRING_ACTIVE; 458 } else { 459 hci_connection->authentication_flags |= AUTH_FLAG_LEGACY_PAIRING_ACTIVE; 460 } 461 // if we are initiator, we have sent an HCI Authenticate Request 462 bool initiator = (hci_connection->bonding_flags & BONDING_SENT_AUTHENTICATE_REQUEST) != 0; 463 464 // if we are responder, use minimal service security level as required level 465 if (!initiator){ 466 hci_connection->requested_security_level = (gap_security_level_t) btstack_max((uint32_t) hci_connection->requested_security_level, (uint32_t) hci_stack->gap_minimal_service_security_level); 467 } 468 469 log_info("pairing started, ssp %u, initiator %u, requested level %u", (int) ssp, (int) initiator, hci_connection->requested_security_level); 470 471 uint8_t event[12]; 472 event[0] = GAP_EVENT_PAIRING_STARTED; 473 event[1] = 10; 474 little_endian_store_16(event, 2, (uint16_t) hci_connection->con_handle); 475 reverse_bd_addr(hci_connection->address, &event[4]); 476 event[10] = (uint8_t) ssp; 477 event[11] = (uint8_t) initiator; 478 hci_emit_event(event, sizeof(event), 1); 479 } 480 481 static void hci_pairing_complete(hci_connection_t * hci_connection, uint8_t status){ 482 hci_connection->requested_security_level = LEVEL_0; 483 if (!hci_pairing_active(hci_connection)) return; 484 hci_connection->authentication_flags &= ~AUTH_FLAG_PAIRING_ACTIVE_MASK; 485 #ifdef ENABLE_CLASSIC_PAIRING_OOB 486 hci_connection->classic_oob_c_192 = NULL; 487 hci_connection->classic_oob_r_192 = NULL; 488 hci_connection->classic_oob_c_256 = NULL; 489 hci_connection->classic_oob_r_256 = NULL; 490 #endif 491 log_info("pairing complete, status %02x", status); 492 493 uint8_t event[11]; 494 event[0] = GAP_EVENT_PAIRING_COMPLETE; 495 event[1] = 9; 496 little_endian_store_16(event, 2, (uint16_t) hci_connection->con_handle); 497 reverse_bd_addr(hci_connection->address, &event[4]); 498 event[10] = status; 499 hci_emit_event(event, sizeof(event), 1); 500 } 501 502 bool hci_authentication_active_for_handle(hci_con_handle_t handle){ 503 hci_connection_t * conn = hci_connection_for_handle(handle); 504 if (!conn) return false; 505 return hci_pairing_active(conn); 506 } 507 508 void gap_drop_link_key_for_bd_addr(bd_addr_t addr){ 509 if (!hci_stack->link_key_db) return; 510 log_info("gap_drop_link_key_for_bd_addr: %s", bd_addr_to_str(addr)); 511 hci_stack->link_key_db->delete_link_key(addr); 512 } 513 514 void gap_store_link_key_for_bd_addr(bd_addr_t addr, link_key_t link_key, link_key_type_t type){ 515 if (!hci_stack->link_key_db) return; 516 log_info("gap_store_link_key_for_bd_addr: %s, type %u", bd_addr_to_str(addr), type); 517 hci_stack->link_key_db->put_link_key(addr, link_key, type); 518 } 519 520 bool gap_get_link_key_for_bd_addr(bd_addr_t addr, link_key_t link_key, link_key_type_t * type){ 521 if (!hci_stack->link_key_db) return false; 522 int result = hci_stack->link_key_db->get_link_key(addr, link_key, type) != 0; 523 log_info("link key for %s available %u, type %u", bd_addr_to_str(addr), result, (int) *type); 524 return result; 525 } 526 527 void gap_delete_all_link_keys(void){ 528 bd_addr_t addr; 529 link_key_t link_key; 530 link_key_type_t type; 531 btstack_link_key_iterator_t it; 532 int ok = gap_link_key_iterator_init(&it); 533 if (!ok) { 534 log_error("could not initialize iterator"); 535 return; 536 } 537 while (gap_link_key_iterator_get_next(&it, addr, link_key, &type)){ 538 gap_drop_link_key_for_bd_addr(addr); 539 } 540 gap_link_key_iterator_done(&it); 541 } 542 543 int gap_link_key_iterator_init(btstack_link_key_iterator_t * it){ 544 if (!hci_stack->link_key_db) return 0; 545 if (!hci_stack->link_key_db->iterator_init) return 0; 546 return hci_stack->link_key_db->iterator_init(it); 547 } 548 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){ 549 if (!hci_stack->link_key_db) return 0; 550 return hci_stack->link_key_db->iterator_get_next(it, bd_addr, link_key, type); 551 } 552 void gap_link_key_iterator_done(btstack_link_key_iterator_t * it){ 553 if (!hci_stack->link_key_db) return; 554 hci_stack->link_key_db->iterator_done(it); 555 } 556 #endif 557 558 static bool hci_is_le_connection_type(bd_addr_type_t address_type){ 559 switch (address_type){ 560 case BD_ADDR_TYPE_LE_PUBLIC: 561 case BD_ADDR_TYPE_LE_RANDOM: 562 case BD_ADDR_TYPE_LE_PRIVAT_FALLBACK_PUBLIC: 563 case BD_ADDR_TYPE_LE_PRIVAT_FALLBACK_RANDOM: 564 return true; 565 default: 566 return false; 567 } 568 } 569 570 static int hci_is_le_connection(hci_connection_t * connection){ 571 return hci_is_le_connection_type(connection->address_type); 572 } 573 574 /** 575 * count connections 576 */ 577 static int nr_hci_connections(void){ 578 int count = 0; 579 btstack_linked_item_t *it; 580 for (it = (btstack_linked_item_t *) hci_stack->connections; it != NULL ; it = it->next){ 581 count++; 582 } 583 return count; 584 } 585 586 uint16_t hci_number_free_acl_slots_for_connection_type(bd_addr_type_t address_type){ 587 588 unsigned int num_packets_sent_classic = 0; 589 unsigned int num_packets_sent_le = 0; 590 591 btstack_linked_item_t *it; 592 for (it = (btstack_linked_item_t *) hci_stack->connections; it != NULL; it = it->next){ 593 hci_connection_t * connection = (hci_connection_t *) it; 594 if (hci_is_le_connection(connection)){ 595 num_packets_sent_le += connection->num_packets_sent; 596 } 597 if (connection->address_type == BD_ADDR_TYPE_ACL){ 598 num_packets_sent_classic += connection->num_packets_sent; 599 } 600 } 601 log_debug("ACL classic buffers: %u used of %u", num_packets_sent_classic, hci_stack->acl_packets_total_num); 602 int free_slots_classic = hci_stack->acl_packets_total_num - num_packets_sent_classic; 603 int free_slots_le = 0; 604 605 if (free_slots_classic < 0){ 606 log_error("hci_number_free_acl_slots: outgoing classic packets (%u) > total classic packets (%u)", num_packets_sent_classic, hci_stack->acl_packets_total_num); 607 return 0; 608 } 609 610 if (hci_stack->le_acl_packets_total_num){ 611 // if we have LE slots, they are used 612 free_slots_le = hci_stack->le_acl_packets_total_num - num_packets_sent_le; 613 if (free_slots_le < 0){ 614 log_error("hci_number_free_acl_slots: outgoing le packets (%u) > total le packets (%u)", num_packets_sent_le, hci_stack->le_acl_packets_total_num); 615 return 0; 616 } 617 } else { 618 // otherwise, classic slots are used for LE, too 619 free_slots_classic -= num_packets_sent_le; 620 if (free_slots_classic < 0){ 621 log_error("hci_number_free_acl_slots: outgoing classic + le packets (%u + %u) > total packets (%u)", num_packets_sent_classic, num_packets_sent_le, hci_stack->acl_packets_total_num); 622 return 0; 623 } 624 } 625 626 switch (address_type){ 627 case BD_ADDR_TYPE_UNKNOWN: 628 log_error("hci_number_free_acl_slots: unknown address type"); 629 return 0; 630 631 case BD_ADDR_TYPE_ACL: 632 return (uint16_t) free_slots_classic; 633 634 default: 635 if (hci_stack->le_acl_packets_total_num > 0){ 636 return (uint16_t) free_slots_le; 637 } 638 return (uint16_t) free_slots_classic; 639 } 640 } 641 642 int hci_number_free_acl_slots_for_handle(hci_con_handle_t con_handle){ 643 // get connection type 644 hci_connection_t * connection = hci_connection_for_handle(con_handle); 645 if (!connection){ 646 log_error("hci_number_free_acl_slots: handle 0x%04x not in connection list", con_handle); 647 return 0; 648 } 649 return hci_number_free_acl_slots_for_connection_type(connection->address_type); 650 } 651 652 #ifdef ENABLE_CLASSIC 653 static int hci_number_free_sco_slots(void){ 654 unsigned int num_sco_packets_sent = 0; 655 btstack_linked_item_t *it; 656 if (hci_stack->synchronous_flow_control_enabled){ 657 // explicit flow control 658 for (it = (btstack_linked_item_t *) hci_stack->connections; it ; it = it->next){ 659 hci_connection_t * connection = (hci_connection_t *) it; 660 if (connection->address_type != BD_ADDR_TYPE_SCO) continue; 661 num_sco_packets_sent += connection->num_packets_sent; 662 } 663 if (num_sco_packets_sent > hci_stack->sco_packets_total_num){ 664 log_info("hci_number_free_sco_slots:packets (%u) > total packets (%u)", num_sco_packets_sent, hci_stack->sco_packets_total_num); 665 return 0; 666 } 667 return hci_stack->sco_packets_total_num - num_sco_packets_sent; 668 } else { 669 // implicit flow control -- TODO 670 int num_ready = 0; 671 for (it = (btstack_linked_item_t *) hci_stack->connections; it ; it = it->next){ 672 hci_connection_t * connection = (hci_connection_t *) it; 673 if (connection->address_type != BD_ADDR_TYPE_SCO) continue; 674 if (connection->sco_tx_ready == 0) continue; 675 num_ready++; 676 } 677 return num_ready; 678 } 679 } 680 #endif 681 682 // only used to send HCI Host Number Completed Packets 683 static int hci_can_send_comand_packet_transport(void){ 684 if (hci_stack->hci_packet_buffer_reserved) return 0; 685 686 // check for async hci transport implementations 687 if (hci_stack->hci_transport->can_send_packet_now){ 688 if (!hci_stack->hci_transport->can_send_packet_now(HCI_COMMAND_DATA_PACKET)){ 689 return 0; 690 } 691 } 692 return 1; 693 } 694 695 // new functions replacing hci_can_send_packet_now[_using_packet_buffer] 696 bool hci_can_send_command_packet_now(void){ 697 if (hci_can_send_comand_packet_transport() == 0) return false; 698 return hci_stack->num_cmd_packets > 0u; 699 } 700 701 static int hci_transport_can_send_prepared_packet_now(uint8_t packet_type){ 702 // check for async hci transport implementations 703 if (!hci_stack->hci_transport->can_send_packet_now) return true; 704 return hci_stack->hci_transport->can_send_packet_now(packet_type); 705 } 706 707 static bool hci_can_send_prepared_acl_packet_for_address_type(bd_addr_type_t address_type){ 708 if (!hci_transport_can_send_prepared_packet_now(HCI_ACL_DATA_PACKET)) return false; 709 return hci_number_free_acl_slots_for_connection_type(address_type) > 0; 710 } 711 712 bool hci_can_send_acl_le_packet_now(void){ 713 if (hci_stack->hci_packet_buffer_reserved) return false; 714 return hci_can_send_prepared_acl_packet_for_address_type(BD_ADDR_TYPE_LE_PUBLIC); 715 } 716 717 bool hci_can_send_prepared_acl_packet_now(hci_con_handle_t con_handle) { 718 if (!hci_transport_can_send_prepared_packet_now(HCI_ACL_DATA_PACKET)) return false; 719 return hci_number_free_acl_slots_for_handle(con_handle) > 0; 720 } 721 722 bool hci_can_send_acl_packet_now(hci_con_handle_t con_handle){ 723 if (hci_stack->hci_packet_buffer_reserved) return false; 724 return hci_can_send_prepared_acl_packet_now(con_handle); 725 } 726 727 #ifdef ENABLE_CLASSIC 728 bool hci_can_send_acl_classic_packet_now(void){ 729 if (hci_stack->hci_packet_buffer_reserved) return false; 730 return hci_can_send_prepared_acl_packet_for_address_type(BD_ADDR_TYPE_ACL); 731 } 732 733 bool hci_can_send_prepared_sco_packet_now(void){ 734 if (!hci_transport_can_send_prepared_packet_now(HCI_SCO_DATA_PACKET)) return false; 735 if (hci_have_usb_transport()){ 736 return hci_stack->sco_can_send_now; 737 } else { 738 return hci_number_free_sco_slots() > 0; 739 } 740 } 741 742 bool hci_can_send_sco_packet_now(void){ 743 if (hci_stack->hci_packet_buffer_reserved) return false; 744 return hci_can_send_prepared_sco_packet_now(); 745 } 746 747 void hci_request_sco_can_send_now_event(void){ 748 hci_stack->sco_waiting_for_can_send_now = 1; 749 hci_notify_if_sco_can_send_now(); 750 } 751 #endif 752 753 // used for internal checks in l2cap.c 754 bool hci_is_packet_buffer_reserved(void){ 755 return hci_stack->hci_packet_buffer_reserved; 756 } 757 758 // reserves outgoing packet buffer. 759 // @return 1 if successful 760 bool hci_reserve_packet_buffer(void){ 761 if (hci_stack->hci_packet_buffer_reserved) { 762 log_error("hci_reserve_packet_buffer called but buffer already reserved"); 763 return false; 764 } 765 hci_stack->hci_packet_buffer_reserved = true; 766 return true; 767 } 768 769 void hci_release_packet_buffer(void){ 770 hci_stack->hci_packet_buffer_reserved = false; 771 } 772 773 // assumption: synchronous implementations don't provide can_send_packet_now as they don't keep the buffer after the call 774 static int hci_transport_synchronous(void){ 775 return hci_stack->hci_transport->can_send_packet_now == NULL; 776 } 777 778 static uint8_t hci_send_acl_packet_fragments(hci_connection_t *connection){ 779 780 // log_info("hci_send_acl_packet_fragments %u/%u (con 0x%04x)", hci_stack->acl_fragmentation_pos, hci_stack->acl_fragmentation_total_size, connection->con_handle); 781 782 // max ACL data packet length depends on connection type (LE vs. Classic) and available buffers 783 uint16_t max_acl_data_packet_length = hci_stack->acl_data_packet_length; 784 if (hci_is_le_connection(connection) && (hci_stack->le_data_packets_length > 0u)){ 785 max_acl_data_packet_length = hci_stack->le_data_packets_length; 786 } 787 788 #ifdef ENABLE_LE_LIMIT_ACL_FRAGMENT_BY_MAX_OCTETS 789 if (hci_is_le_connection(connection) && (connection->le_max_tx_octets < max_acl_data_packet_length)){ 790 max_acl_data_packet_length = connection->le_max_tx_octets; 791 } 792 #endif 793 794 log_debug("hci_send_acl_packet_fragments entered"); 795 796 uint8_t status = ERROR_CODE_SUCCESS; 797 // multiple packets could be send on a synchronous HCI transport 798 while (true){ 799 800 log_debug("hci_send_acl_packet_fragments loop entered"); 801 802 // get current data 803 const uint16_t acl_header_pos = hci_stack->acl_fragmentation_pos - 4u; 804 int current_acl_data_packet_length = hci_stack->acl_fragmentation_total_size - hci_stack->acl_fragmentation_pos; 805 bool more_fragments = false; 806 807 // if ACL packet is larger than Bluetooth packet buffer, only send max_acl_data_packet_length 808 if (current_acl_data_packet_length > max_acl_data_packet_length){ 809 more_fragments = true; 810 current_acl_data_packet_length = max_acl_data_packet_length; 811 } 812 813 // copy handle_and_flags if not first fragment and update packet boundary flags to be 01 (continuing fragmnent) 814 if (acl_header_pos > 0u){ 815 uint16_t handle_and_flags = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 816 handle_and_flags = (handle_and_flags & 0xcfffu) | (1u << 12u); 817 little_endian_store_16(hci_stack->hci_packet_buffer, acl_header_pos, handle_and_flags); 818 } 819 820 // update header len 821 little_endian_store_16(hci_stack->hci_packet_buffer, acl_header_pos + 2u, current_acl_data_packet_length); 822 823 // count packet 824 connection->num_packets_sent++; 825 log_debug("hci_send_acl_packet_fragments loop before send (more fragments %d)", (int) more_fragments); 826 827 // update state for next fragment (if any) as "transport done" might be sent during send_packet already 828 if (more_fragments){ 829 // update start of next fragment to send 830 hci_stack->acl_fragmentation_pos += current_acl_data_packet_length; 831 } else { 832 // done 833 hci_stack->acl_fragmentation_pos = 0; 834 hci_stack->acl_fragmentation_total_size = 0; 835 } 836 837 // send packet 838 uint8_t * packet = &hci_stack->hci_packet_buffer[acl_header_pos]; 839 const int size = current_acl_data_packet_length + 4; 840 hci_dump_packet(HCI_ACL_DATA_PACKET, 0, packet, size); 841 hci_stack->acl_fragmentation_tx_active = 1; 842 int err = hci_stack->hci_transport->send_packet(HCI_ACL_DATA_PACKET, packet, size); 843 if (err != 0){ 844 // no error from HCI Transport expected 845 status = ERROR_CODE_HARDWARE_FAILURE; 846 } 847 848 log_debug("hci_send_acl_packet_fragments loop after send (more fragments %d)", (int) more_fragments); 849 850 // done yet? 851 if (!more_fragments) break; 852 853 // can send more? 854 if (!hci_can_send_prepared_acl_packet_now(connection->con_handle)) return status; 855 } 856 857 log_debug("hci_send_acl_packet_fragments loop over"); 858 859 // release buffer now for synchronous transport 860 if (hci_transport_synchronous()){ 861 hci_stack->acl_fragmentation_tx_active = 0; 862 hci_release_packet_buffer(); 863 hci_emit_transport_packet_sent(); 864 } 865 866 return status; 867 } 868 869 // pre: caller has reserved the packet buffer 870 uint8_t hci_send_acl_packet_buffer(int size){ 871 btstack_assert(hci_stack->hci_packet_buffer_reserved); 872 873 uint8_t * packet = hci_stack->hci_packet_buffer; 874 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(packet); 875 876 // check for free places on Bluetooth module 877 if (!hci_can_send_prepared_acl_packet_now(con_handle)) { 878 log_error("hci_send_acl_packet_buffer called but no free ACL buffers on controller"); 879 hci_release_packet_buffer(); 880 hci_emit_transport_packet_sent(); 881 return BTSTACK_ACL_BUFFERS_FULL; 882 } 883 884 hci_connection_t *connection = hci_connection_for_handle( con_handle); 885 if (!connection) { 886 log_error("hci_send_acl_packet_buffer called but no connection for handle 0x%04x", con_handle); 887 hci_release_packet_buffer(); 888 hci_emit_transport_packet_sent(); 889 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 890 } 891 892 #ifdef ENABLE_CLASSIC 893 hci_connection_timestamp(connection); 894 #endif 895 896 // hci_dump_packet( HCI_ACL_DATA_PACKET, 0, packet, size); 897 898 // setup data 899 hci_stack->acl_fragmentation_total_size = size; 900 hci_stack->acl_fragmentation_pos = 4; // start of L2CAP packet 901 902 return hci_send_acl_packet_fragments(connection); 903 } 904 905 #ifdef ENABLE_CLASSIC 906 // pre: caller has reserved the packet buffer 907 uint8_t hci_send_sco_packet_buffer(int size){ 908 btstack_assert(hci_stack->hci_packet_buffer_reserved); 909 910 uint8_t * packet = hci_stack->hci_packet_buffer; 911 912 // skip checks in loopback mode 913 if (!hci_stack->loopback_mode){ 914 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(packet); // same for ACL and SCO 915 916 // check for free places on Bluetooth module 917 if (!hci_can_send_prepared_sco_packet_now()) { 918 log_error("hci_send_sco_packet_buffer called but no free SCO buffers on controller"); 919 hci_release_packet_buffer(); 920 hci_emit_transport_packet_sent(); 921 return BTSTACK_ACL_BUFFERS_FULL; 922 } 923 924 // track send packet in connection struct 925 hci_connection_t *connection = hci_connection_for_handle( con_handle); 926 if (!connection) { 927 log_error("hci_send_sco_packet_buffer called but no connection for handle 0x%04x", con_handle); 928 hci_release_packet_buffer(); 929 hci_emit_transport_packet_sent(); 930 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 931 } 932 933 if (hci_have_usb_transport()){ 934 // token used 935 hci_stack->sco_can_send_now = false; 936 } else { 937 if (hci_stack->synchronous_flow_control_enabled){ 938 connection->num_packets_sent++; 939 } else { 940 connection->sco_tx_ready--; 941 } 942 } 943 } 944 945 hci_dump_packet( HCI_SCO_DATA_PACKET, 0, packet, size); 946 947 #ifdef HAVE_SCO_TRANSPORT 948 hci_stack->sco_transport->send_packet(packet, size); 949 hci_release_packet_buffer(); 950 hci_emit_transport_packet_sent(); 951 952 return 0; 953 #else 954 int err = hci_stack->hci_transport->send_packet(HCI_SCO_DATA_PACKET, packet, size); 955 if (hci_transport_synchronous()){ 956 hci_release_packet_buffer(); 957 hci_emit_transport_packet_sent(); 958 } 959 960 if (err != 0){ 961 return ERROR_CODE_HARDWARE_FAILURE; 962 } 963 return ERROR_CODE_SUCCESS; 964 #endif 965 } 966 #endif 967 968 static void acl_handler(uint8_t *packet, uint16_t size){ 969 970 // get info 971 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(packet); 972 hci_connection_t *conn = hci_connection_for_handle(con_handle); 973 uint8_t acl_flags = READ_ACL_FLAGS(packet); 974 uint16_t acl_length = READ_ACL_LENGTH(packet); 975 976 // ignore non-registered handle 977 if (!conn){ 978 log_error("acl_handler called with non-registered handle %u!" , con_handle); 979 return; 980 } 981 982 // assert packet is complete 983 if ((acl_length + 4u) != size){ 984 log_error("acl_handler called with ACL packet of wrong size %d, expected %u => dropping packet", size, acl_length + 4); 985 return; 986 } 987 988 #ifdef ENABLE_CLASSIC 989 // update idle timestamp 990 hci_connection_timestamp(conn); 991 #endif 992 993 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 994 hci_stack->host_completed_packets = 1; 995 conn->num_packets_completed++; 996 #endif 997 998 // handle different packet types 999 switch (acl_flags & 0x03u) { 1000 1001 case 0x01: // continuation fragment 1002 1003 // sanity checks 1004 if (conn->acl_recombination_pos == 0u) { 1005 log_error( "ACL Cont Fragment but no first fragment for handle 0x%02x", con_handle); 1006 return; 1007 } 1008 if ((conn->acl_recombination_pos + acl_length) > (4u + HCI_ACL_BUFFER_SIZE)){ 1009 log_error( "ACL Cont Fragment to large: combined packet %u > buffer size %u for handle 0x%02x", 1010 conn->acl_recombination_pos + acl_length, 4 + HCI_ACL_BUFFER_SIZE, con_handle); 1011 conn->acl_recombination_pos = 0; 1012 return; 1013 } 1014 1015 // append fragment payload (header already stored) 1016 (void)memcpy(&conn->acl_recombination_buffer[HCI_INCOMING_PRE_BUFFER_SIZE + conn->acl_recombination_pos], 1017 &packet[4], acl_length); 1018 conn->acl_recombination_pos += acl_length; 1019 1020 // forward complete L2CAP packet if complete. 1021 if (conn->acl_recombination_pos >= (conn->acl_recombination_length + 4u + 4u)){ // pos already incl. ACL header 1022 hci_emit_acl_packet(&conn->acl_recombination_buffer[HCI_INCOMING_PRE_BUFFER_SIZE], conn->acl_recombination_pos); 1023 // reset recombination buffer 1024 conn->acl_recombination_length = 0; 1025 conn->acl_recombination_pos = 0; 1026 } 1027 break; 1028 1029 case 0x02: { // first fragment 1030 1031 // sanity check 1032 if (conn->acl_recombination_pos) { 1033 log_error( "ACL First Fragment but data in buffer for handle 0x%02x, dropping stale fragments", con_handle); 1034 conn->acl_recombination_pos = 0; 1035 } 1036 1037 // peek into L2CAP packet! 1038 uint16_t l2cap_length = READ_L2CAP_LENGTH( packet ); 1039 1040 // compare fragment size to L2CAP packet size 1041 if (acl_length >= (l2cap_length + 4u)){ 1042 // forward fragment as L2CAP packet 1043 hci_emit_acl_packet(packet, acl_length + 4u); 1044 } else { 1045 1046 if (acl_length > HCI_ACL_BUFFER_SIZE){ 1047 log_error( "ACL First Fragment to large: fragment %u > buffer size %u for handle 0x%02x", 1048 4 + acl_length, 4 + HCI_ACL_BUFFER_SIZE, con_handle); 1049 return; 1050 } 1051 1052 // store first fragment and tweak acl length for complete package 1053 (void)memcpy(&conn->acl_recombination_buffer[HCI_INCOMING_PRE_BUFFER_SIZE], 1054 packet, acl_length + 4u); 1055 conn->acl_recombination_pos = acl_length + 4u; 1056 conn->acl_recombination_length = l2cap_length; 1057 little_endian_store_16(conn->acl_recombination_buffer, HCI_INCOMING_PRE_BUFFER_SIZE + 2u, l2cap_length +4u); 1058 } 1059 break; 1060 1061 } 1062 default: 1063 log_error( "acl_handler called with invalid packet boundary flags %u", acl_flags & 0x03); 1064 return; 1065 } 1066 1067 // execute main loop 1068 hci_run(); 1069 } 1070 1071 static void hci_connection_stop_timer(hci_connection_t * conn){ 1072 btstack_run_loop_remove_timer(&conn->timeout); 1073 #ifdef ENABLE_CLASSIC 1074 btstack_run_loop_remove_timer(&conn->timeout_sco); 1075 #endif 1076 } 1077 1078 static void hci_shutdown_connection(hci_connection_t *conn){ 1079 log_info("Connection closed: handle 0x%x, %s", conn->con_handle, bd_addr_to_str(conn->address)); 1080 1081 #ifdef ENABLE_CLASSIC 1082 #if defined(ENABLE_SCO_OVER_HCI) || defined(HAVE_SCO_TRANSPORT) 1083 bd_addr_type_t addr_type = conn->address_type; 1084 #endif 1085 #ifdef HAVE_SCO_TRANSPORT 1086 hci_con_handle_t con_handle = conn->con_handle; 1087 #endif 1088 #endif 1089 1090 hci_connection_stop_timer(conn); 1091 1092 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 1093 btstack_memory_hci_connection_free( conn ); 1094 1095 // now it's gone 1096 hci_emit_nr_connections_changed(); 1097 1098 #ifdef ENABLE_CLASSIC 1099 #ifdef ENABLE_SCO_OVER_HCI 1100 // update SCO 1101 if ((addr_type == BD_ADDR_TYPE_SCO) && (hci_stack->hci_transport != NULL) && (hci_stack->hci_transport->set_sco_config != NULL)){ 1102 hci_stack->hci_transport->set_sco_config(hci_stack->sco_voice_setting_active, hci_number_sco_connections()); 1103 } 1104 #endif 1105 #ifdef HAVE_SCO_TRANSPORT 1106 if ((addr_type == BD_ADDR_TYPE_SCO) && (hci_stack->sco_transport != NULL)){ 1107 hci_stack->sco_transport->close(con_handle); 1108 } 1109 #endif 1110 #endif 1111 } 1112 1113 #ifdef ENABLE_CLASSIC 1114 1115 static const uint16_t packet_type_sizes[] = { 1116 0, HCI_ACL_2DH1_SIZE, HCI_ACL_3DH1_SIZE, HCI_ACL_DM1_SIZE, 1117 HCI_ACL_DH1_SIZE, 0, 0, 0, 1118 HCI_ACL_2DH3_SIZE, HCI_ACL_3DH3_SIZE, HCI_ACL_DM3_SIZE, HCI_ACL_DH3_SIZE, 1119 HCI_ACL_2DH5_SIZE, HCI_ACL_3DH5_SIZE, HCI_ACL_DM5_SIZE, HCI_ACL_DH5_SIZE 1120 }; 1121 static const uint8_t packet_type_feature_requirement_bit[] = { 1122 0, // 3 slot packets 1123 1, // 5 slot packets 1124 25, // EDR 2 mpbs 1125 26, // EDR 3 mbps 1126 39, // 3 slot EDR packts 1127 40, // 5 slot EDR packet 1128 }; 1129 static const uint16_t packet_type_feature_packet_mask[] = { 1130 0x0f00, // 3 slot packets 1131 0xf000, // 5 slot packets 1132 0x1102, // EDR 2 mpbs 1133 0x2204, // EDR 3 mbps 1134 0x0300, // 3 slot EDR packts 1135 0x3000, // 5 slot EDR packet 1136 }; 1137 1138 static uint16_t hci_acl_packet_types_for_buffer_size_and_local_features(uint16_t buffer_size, uint8_t * local_supported_features){ 1139 // enable packet types based on size 1140 uint16_t packet_types = 0; 1141 unsigned int i; 1142 for (i=0;i<16;i++){ 1143 if (packet_type_sizes[i] == 0) continue; 1144 if (packet_type_sizes[i] <= buffer_size){ 1145 packet_types |= 1 << i; 1146 } 1147 } 1148 // disable packet types due to missing local supported features 1149 for (i=0;i<sizeof(packet_type_feature_requirement_bit);i++){ 1150 unsigned int bit_idx = packet_type_feature_requirement_bit[i]; 1151 int feature_set = (local_supported_features[bit_idx >> 3] & (1<<(bit_idx & 7))) != 0; 1152 if (feature_set) continue; 1153 log_info("Features bit %02u is not set, removing packet types 0x%04x", bit_idx, packet_type_feature_packet_mask[i]); 1154 packet_types &= ~packet_type_feature_packet_mask[i]; 1155 } 1156 // flip bits for "may not be used" 1157 packet_types ^= 0x3306; 1158 return packet_types; 1159 } 1160 1161 uint16_t hci_usable_acl_packet_types(void){ 1162 return hci_stack->packet_types; 1163 } 1164 #endif 1165 1166 uint8_t* hci_get_outgoing_packet_buffer(void){ 1167 // hci packet buffer is >= acl data packet length 1168 return hci_stack->hci_packet_buffer; 1169 } 1170 1171 uint16_t hci_max_acl_data_packet_length(void){ 1172 return hci_stack->acl_data_packet_length; 1173 } 1174 1175 #ifdef ENABLE_CLASSIC 1176 bool hci_extended_sco_link_supported(void){ 1177 // No. 31, byte 3, bit 7 1178 return (hci_stack->local_supported_features[3] & (1 << 7)) != 0; 1179 } 1180 #endif 1181 1182 bool hci_non_flushable_packet_boundary_flag_supported(void){ 1183 // No. 54, byte 6, bit 6 1184 return (hci_stack->local_supported_features[6u] & (1u << 6u)) != 0u; 1185 } 1186 1187 #ifdef ENABLE_CLASSIC 1188 static int gap_ssp_supported(void){ 1189 // No. 51, byte 6, bit 3 1190 return (hci_stack->local_supported_features[6u] & (1u << 3u)) != 0u; 1191 } 1192 #endif 1193 1194 static int hci_classic_supported(void){ 1195 #ifdef ENABLE_CLASSIC 1196 // No. 37, byte 4, bit 5, = No BR/EDR Support 1197 return (hci_stack->local_supported_features[4] & (1 << 5)) == 0; 1198 #else 1199 return 0; 1200 #endif 1201 } 1202 1203 static int hci_le_supported(void){ 1204 #ifdef ENABLE_BLE 1205 // No. 37, byte 4, bit 6 = LE Supported (Controller) 1206 return (hci_stack->local_supported_features[4u] & (1u << 6u)) != 0u; 1207 #else 1208 return 0; 1209 #endif 1210 } 1211 1212 static bool hci_command_supported(uint8_t command_index){ 1213 return (hci_stack->local_supported_commands & (1LU << command_index)) != 0; 1214 } 1215 1216 #ifdef ENABLE_BLE 1217 1218 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 1219 static bool hci_extended_advertising_supported(void){ 1220 return hci_command_supported(SUPPORTED_HCI_COMMAND_LE_SET_EXTENDED_ADVERTISING_ENABLE); 1221 } 1222 #endif 1223 1224 static void hci_get_own_address_for_addr_type(uint8_t own_addr_type, bd_addr_t own_addr){ 1225 if (own_addr_type == BD_ADDR_TYPE_LE_PUBLIC){ 1226 (void)memcpy(own_addr, hci_stack->local_bd_addr, 6); 1227 } else { 1228 (void)memcpy(own_addr, hci_stack->le_random_address, 6); 1229 } 1230 } 1231 1232 void gap_le_get_own_address(uint8_t * addr_type, bd_addr_t addr){ 1233 *addr_type = hci_stack->le_own_addr_type; 1234 hci_get_own_address_for_addr_type(hci_stack->le_own_addr_type, addr); 1235 } 1236 1237 #ifdef ENABLE_LE_PERIPHERAL 1238 void gap_le_get_own_advertisements_address(uint8_t * addr_type, bd_addr_t addr){ 1239 *addr_type = hci_stack->le_advertisements_own_addr_type; 1240 hci_get_own_address_for_addr_type(hci_stack->le_advertisements_own_addr_type, addr); 1241 }; 1242 #endif 1243 1244 #ifdef ENABLE_LE_CENTRAL 1245 1246 /** 1247 * @brief Get own addr type and address used for LE connections (Central) 1248 */ 1249 void gap_le_get_own_connection_address(uint8_t * addr_type, bd_addr_t addr){ 1250 *addr_type = hci_stack->le_connection_own_addr_type; 1251 hci_get_own_address_for_addr_type(hci_stack->le_connection_own_addr_type, addr); 1252 } 1253 1254 void le_handle_advertisement_report(uint8_t *packet, uint16_t size){ 1255 1256 uint16_t offset = 3; 1257 uint8_t num_reports = packet[offset]; 1258 offset += 1; 1259 1260 uint16_t i; 1261 uint8_t event[12 + LE_ADVERTISING_DATA_SIZE]; // use upper bound to avoid var size automatic var 1262 for (i=0; (i<num_reports) && (offset < size);i++){ 1263 // sanity checks on data_length: 1264 uint8_t data_length = packet[offset + 8]; 1265 if (data_length > LE_ADVERTISING_DATA_SIZE) return; 1266 if ((offset + 9u + data_length + 1u) > size) return; 1267 // setup event 1268 uint8_t event_size = 10u + data_length; 1269 uint16_t pos = 0; 1270 event[pos++] = GAP_EVENT_ADVERTISING_REPORT; 1271 event[pos++] = event_size; 1272 (void)memcpy(&event[pos], &packet[offset], 1 + 1 + 6); // event type + address type + address 1273 offset += 8; 1274 pos += 8; 1275 event[pos++] = packet[offset + 1 + data_length]; // rssi 1276 event[pos++] = data_length; 1277 offset++; 1278 (void)memcpy(&event[pos], &packet[offset], data_length); 1279 pos += data_length; 1280 offset += data_length + 1u; // rssi 1281 hci_emit_event(event, pos, 1); 1282 } 1283 } 1284 1285 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 1286 void le_handle_extended_advertisement_report(uint8_t *packet, uint16_t size) { 1287 uint16_t offset = 3; 1288 uint8_t num_reports = packet[offset++]; 1289 uint8_t event[2 + 255]; // use upper bound to avoid var size automatic var 1290 uint8_t i; 1291 for (i=0; (i<num_reports) && (offset < size);i++){ 1292 // sanity checks on data_length: 1293 uint16_t data_length = packet[offset + 23]; 1294 if (data_length > LE_ADVERTISING_DATA_SIZE) return; 1295 if ((offset + 24u + data_length) > size) return; 1296 uint16_t event_type = little_endian_read_16(packet, offset); 1297 offset += 2; 1298 if ((event_type & 0x10) != 0) { 1299 // setup legacy event 1300 uint8_t legacy_event_type; 1301 switch (event_type){ 1302 case 0b0010011: 1303 // ADV_IND 1304 legacy_event_type = 0; 1305 break; 1306 case 0b0010101: 1307 // ADV_DIRECT_IND 1308 legacy_event_type = 1; 1309 break; 1310 case 0b0010010: 1311 // ADV_SCAN_IND 1312 legacy_event_type = 2; 1313 break; 1314 case 0b0010000: 1315 // ADV_NONCONN_IND 1316 legacy_event_type = 3; 1317 break; 1318 case 0b0011011: 1319 case 0b0011010: 1320 // SCAN_RSP 1321 legacy_event_type = 4; 1322 break; 1323 default: 1324 legacy_event_type = 0; 1325 break; 1326 } 1327 uint16_t pos = 0; 1328 event[pos++] = GAP_EVENT_ADVERTISING_REPORT; 1329 event[pos++] = 10u + data_length; 1330 event[pos++] = legacy_event_type; 1331 // copy address type + address 1332 (void) memcpy(&event[pos], &packet[offset], 1 + 6); 1333 offset += 7; 1334 pos += 7; 1335 // skip primary_phy, secondary_phy, advertising_sid, tx_power 1336 offset += 4; 1337 // copy rssi 1338 event[pos++] = packet[offset++]; 1339 // skip periodic advertising interval and direct address 1340 offset += 9; 1341 // copy data len + data; 1342 (void) memcpy(&event[pos], &packet[offset], 1 + data_length); 1343 pos += 1 +data_length; 1344 offset += 1+ data_length; 1345 hci_emit_event(event, pos, 1); 1346 } else { 1347 event[0] = GAP_EVENT_EXTENDED_ADVERTISING_REPORT; 1348 uint8_t report_len = 24 + data_length; 1349 event[1] = report_len; 1350 little_endian_store_16(event, 2, event_type); 1351 memcpy(&event[4], &packet[offset], report_len); 1352 offset += report_len; 1353 hci_emit_event(event, 2 + report_len, 1); 1354 } 1355 } 1356 } 1357 #endif 1358 1359 #endif 1360 #endif 1361 1362 #ifdef ENABLE_BLE 1363 #ifdef ENABLE_LE_PERIPHERAL 1364 static void hci_update_advertisements_enabled_for_current_roles(void){ 1365 if ((hci_stack->le_advertisements_state & LE_ADVERTISEMENT_STATE_ENABLED) != 0){ 1366 // get number of active le slave connections 1367 int num_slave_connections = 0; 1368 btstack_linked_list_iterator_t it; 1369 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 1370 while (btstack_linked_list_iterator_has_next(&it)){ 1371 hci_connection_t * con = (hci_connection_t*) btstack_linked_list_iterator_next(&it); 1372 log_info("state %u, role %u, le_con %u", con->state, con->role, hci_is_le_connection(con)); 1373 if (con->state != OPEN) continue; 1374 if (con->role != HCI_ROLE_SLAVE) continue; 1375 if (!hci_is_le_connection(con)) continue; 1376 num_slave_connections++; 1377 } 1378 log_info("Num LE Peripheral roles: %u of %u", num_slave_connections, hci_stack->le_max_number_peripheral_connections); 1379 hci_stack->le_advertisements_enabled_for_current_roles = num_slave_connections < hci_stack->le_max_number_peripheral_connections; 1380 } else { 1381 hci_stack->le_advertisements_enabled_for_current_roles = false; 1382 } 1383 } 1384 #endif 1385 #endif 1386 1387 #ifdef ENABLE_CLASSIC 1388 static void gap_run_set_local_name(void){ 1389 hci_reserve_packet_buffer(); 1390 uint8_t * packet = hci_stack->hci_packet_buffer; 1391 // construct HCI Command and send 1392 uint16_t opcode = hci_write_local_name.opcode; 1393 hci_stack->last_cmd_opcode = opcode; 1394 packet[0] = opcode & 0xff; 1395 packet[1] = opcode >> 8; 1396 packet[2] = DEVICE_NAME_LEN; 1397 memset(&packet[3], 0, DEVICE_NAME_LEN); 1398 uint16_t name_len = (uint16_t) strlen(hci_stack->local_name); 1399 uint16_t bytes_to_copy = btstack_min(name_len, DEVICE_NAME_LEN); 1400 // if shorter than DEVICE_NAME_LEN, it's implicitly NULL-terminated by memset call 1401 (void)memcpy(&packet[3], hci_stack->local_name, bytes_to_copy); 1402 // expand '00:00:00:00:00:00' in name with bd_addr 1403 btstack_replace_bd_addr_placeholder(&packet[3], bytes_to_copy, hci_stack->local_bd_addr); 1404 hci_send_cmd_packet(packet, HCI_CMD_HEADER_SIZE + DEVICE_NAME_LEN); 1405 } 1406 1407 static void gap_run_set_eir_data(void){ 1408 hci_reserve_packet_buffer(); 1409 uint8_t * packet = hci_stack->hci_packet_buffer; 1410 // construct HCI Command in-place and send 1411 uint16_t opcode = hci_write_extended_inquiry_response.opcode; 1412 hci_stack->last_cmd_opcode = opcode; 1413 uint16_t offset = 0; 1414 packet[offset++] = opcode & 0xff; 1415 packet[offset++] = opcode >> 8; 1416 packet[offset++] = 1 + EXTENDED_INQUIRY_RESPONSE_DATA_LEN; 1417 packet[offset++] = 0; // FEC not required 1418 memset(&packet[offset], 0, EXTENDED_INQUIRY_RESPONSE_DATA_LEN); 1419 if (hci_stack->eir_data){ 1420 // copy items and expand '00:00:00:00:00:00' in name with bd_addr 1421 ad_context_t context; 1422 for (ad_iterator_init(&context, EXTENDED_INQUIRY_RESPONSE_DATA_LEN, hci_stack->eir_data) ; ad_iterator_has_more(&context) ; ad_iterator_next(&context)) { 1423 uint8_t data_type = ad_iterator_get_data_type(&context); 1424 uint8_t size = ad_iterator_get_data_len(&context); 1425 const uint8_t *data = ad_iterator_get_data(&context); 1426 // copy item 1427 packet[offset++] = size + 1; 1428 packet[offset++] = data_type; 1429 memcpy(&packet[offset], data, size); 1430 // update name item 1431 if ((data_type == BLUETOOTH_DATA_TYPE_SHORTENED_LOCAL_NAME) || (data_type == BLUETOOTH_DATA_TYPE_COMPLETE_LOCAL_NAME)){ 1432 btstack_replace_bd_addr_placeholder(&packet[offset], size, hci_stack->local_bd_addr); 1433 } 1434 offset += size; 1435 } 1436 } else { 1437 uint16_t name_len = (uint16_t) strlen(hci_stack->local_name); 1438 uint16_t bytes_to_copy = btstack_min(name_len, EXTENDED_INQUIRY_RESPONSE_DATA_LEN - 2); 1439 packet[offset++] = bytes_to_copy + 1; 1440 packet[offset++] = BLUETOOTH_DATA_TYPE_COMPLETE_LOCAL_NAME; 1441 (void)memcpy(&packet[6], hci_stack->local_name, bytes_to_copy); 1442 // expand '00:00:00:00:00:00' in name with bd_addr 1443 btstack_replace_bd_addr_placeholder(&packet[offset], bytes_to_copy, hci_stack->local_bd_addr); 1444 } 1445 hci_send_cmd_packet(packet, HCI_CMD_HEADER_SIZE + 1 + EXTENDED_INQUIRY_RESPONSE_DATA_LEN); 1446 } 1447 1448 static void hci_run_gap_tasks_classic(void){ 1449 if ((hci_stack->gap_tasks_classic & GAP_TASK_SET_CLASS_OF_DEVICE) != 0) { 1450 hci_stack->gap_tasks_classic &= ~GAP_TASK_SET_CLASS_OF_DEVICE; 1451 hci_send_cmd(&hci_write_class_of_device, hci_stack->class_of_device); 1452 return; 1453 } 1454 if ((hci_stack->gap_tasks_classic & GAP_TASK_SET_LOCAL_NAME) != 0) { 1455 hci_stack->gap_tasks_classic &= ~GAP_TASK_SET_LOCAL_NAME; 1456 gap_run_set_local_name(); 1457 return; 1458 } 1459 if ((hci_stack->gap_tasks_classic & GAP_TASK_SET_EIR_DATA) != 0) { 1460 hci_stack->gap_tasks_classic &= ~GAP_TASK_SET_EIR_DATA; 1461 gap_run_set_eir_data(); 1462 return; 1463 } 1464 if ((hci_stack->gap_tasks_classic & GAP_TASK_SET_DEFAULT_LINK_POLICY) != 0) { 1465 hci_stack->gap_tasks_classic &= ~GAP_TASK_SET_DEFAULT_LINK_POLICY; 1466 hci_send_cmd(&hci_write_default_link_policy_setting, hci_stack->default_link_policy_settings); 1467 return; 1468 } 1469 // write page scan activity 1470 if ((hci_stack->gap_tasks_classic & GAP_TASK_WRITE_PAGE_SCAN_ACTIVITY) != 0) { 1471 hci_stack->gap_tasks_classic &= ~GAP_TASK_WRITE_PAGE_SCAN_ACTIVITY; 1472 hci_send_cmd(&hci_write_page_scan_activity, hci_stack->new_page_scan_interval, hci_stack->new_page_scan_window); 1473 return; 1474 } 1475 // write page scan type 1476 if ((hci_stack->gap_tasks_classic & GAP_TASK_WRITE_PAGE_SCAN_TYPE) != 0) { 1477 hci_stack->gap_tasks_classic &= ~GAP_TASK_WRITE_PAGE_SCAN_TYPE; 1478 hci_send_cmd(&hci_write_page_scan_type, hci_stack->new_page_scan_type); 1479 return; 1480 } 1481 // write page timeout 1482 if ((hci_stack->gap_tasks_classic & GAP_TASK_WRITE_PAGE_TIMEOUT) != 0) { 1483 hci_stack->gap_tasks_classic &= ~GAP_TASK_WRITE_PAGE_TIMEOUT; 1484 hci_send_cmd(&hci_write_page_timeout, hci_stack->page_timeout); 1485 return; 1486 } 1487 // send scan enable 1488 if ((hci_stack->gap_tasks_classic & GAP_TASK_WRITE_SCAN_ENABLE) != 0) { 1489 hci_stack->gap_tasks_classic &= ~GAP_TASK_WRITE_SCAN_ENABLE; 1490 hci_send_cmd(&hci_write_scan_enable, hci_stack->new_scan_enable_value); 1491 return; 1492 } 1493 // send write scan activity 1494 if ((hci_stack->gap_tasks_classic & GAP_TASK_WRITE_INQUIRY_SCAN_ACTIVITY) != 0) { 1495 hci_stack->gap_tasks_classic &= ~GAP_TASK_WRITE_INQUIRY_SCAN_ACTIVITY; 1496 hci_send_cmd(&hci_write_inquiry_scan_activity, hci_stack->inquiry_scan_interval, hci_stack->inquiry_scan_window); 1497 return; 1498 } 1499 } 1500 #endif 1501 1502 #ifndef HAVE_HOST_CONTROLLER_API 1503 1504 static uint32_t hci_transport_uart_get_main_baud_rate(void){ 1505 if (!hci_stack->config) return 0; 1506 uint32_t baud_rate = ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_main; 1507 // Limit baud rate for Broadcom chipsets to 3 mbps 1508 if ((hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION) && (baud_rate > 3000000)){ 1509 baud_rate = 3000000; 1510 } 1511 return baud_rate; 1512 } 1513 1514 static void hci_initialization_timeout_handler(btstack_timer_source_t * ds){ 1515 UNUSED(ds); 1516 1517 switch (hci_stack->substate){ 1518 case HCI_INIT_W4_SEND_RESET: 1519 log_info("Resend HCI Reset"); 1520 hci_stack->substate = HCI_INIT_SEND_RESET; 1521 hci_stack->num_cmd_packets = 1; 1522 hci_run(); 1523 break; 1524 case HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT_LINK_RESET: 1525 log_info("Resend HCI Reset - CSR Warm Boot with Link Reset"); 1526 if (hci_stack->hci_transport->reset_link){ 1527 hci_stack->hci_transport->reset_link(); 1528 } 1529 1530 /* fall through */ 1531 1532 case HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT: 1533 log_info("Resend HCI Reset - CSR Warm Boot"); 1534 hci_stack->substate = HCI_INIT_SEND_RESET_CSR_WARM_BOOT; 1535 hci_stack->num_cmd_packets = 1; 1536 hci_run(); 1537 break; 1538 case HCI_INIT_W4_SEND_BAUD_CHANGE: 1539 if (hci_stack->hci_transport->set_baudrate){ 1540 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1541 log_info("Local baud rate change to %" PRIu32 "(timeout handler)", baud_rate); 1542 hci_stack->hci_transport->set_baudrate(baud_rate); 1543 } 1544 // For CSR, HCI Reset is sent on new baud rate. Don't forget to reset link for H5/BCSP 1545 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_CAMBRIDGE_SILICON_RADIO){ 1546 if (hci_stack->hci_transport->reset_link){ 1547 log_info("Link Reset"); 1548 hci_stack->hci_transport->reset_link(); 1549 } 1550 hci_stack->substate = HCI_INIT_SEND_RESET_CSR_WARM_BOOT; 1551 hci_run(); 1552 } 1553 break; 1554 case HCI_INIT_W4_CUSTOM_INIT_BCM_DELAY: 1555 // otherwise continue 1556 hci_stack->substate = HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS; 1557 hci_send_cmd(&hci_read_local_supported_commands); 1558 break; 1559 default: 1560 break; 1561 } 1562 } 1563 #endif 1564 1565 static void hci_initializing_next_state(void){ 1566 hci_stack->substate = (hci_substate_t )( ((int) hci_stack->substate) + 1); 1567 } 1568 1569 static void hci_init_done(void){ 1570 // done. tell the app 1571 log_info("hci_init_done -> HCI_STATE_WORKING"); 1572 hci_stack->state = HCI_STATE_WORKING; 1573 hci_emit_state(); 1574 } 1575 1576 // assumption: hci_can_send_command_packet_now() == true 1577 static void hci_initializing_run(void){ 1578 log_debug("hci_initializing_run: substate %u, can send %u", hci_stack->substate, hci_can_send_command_packet_now()); 1579 1580 if (!hci_can_send_command_packet_now()) return; 1581 1582 #ifndef HAVE_HOST_CONTROLLER_API 1583 bool need_baud_change = hci_stack->config 1584 && hci_stack->chipset 1585 && hci_stack->chipset->set_baudrate_command 1586 && hci_stack->hci_transport->set_baudrate 1587 && ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_main; 1588 #endif 1589 1590 switch (hci_stack->substate){ 1591 case HCI_INIT_SEND_RESET: 1592 hci_state_reset(); 1593 1594 #ifndef HAVE_HOST_CONTROLLER_API 1595 // prepare reset if command complete not received in 100ms 1596 btstack_run_loop_set_timer(&hci_stack->timeout, HCI_RESET_RESEND_TIMEOUT_MS); 1597 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_initialization_timeout_handler); 1598 btstack_run_loop_add_timer(&hci_stack->timeout); 1599 #endif 1600 // send command 1601 hci_stack->substate = HCI_INIT_W4_SEND_RESET; 1602 hci_send_cmd(&hci_reset); 1603 break; 1604 case HCI_INIT_SEND_READ_LOCAL_VERSION_INFORMATION: 1605 hci_send_cmd(&hci_read_local_version_information); 1606 hci_stack->substate = HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION; 1607 break; 1608 1609 #ifndef HAVE_HOST_CONTROLLER_API 1610 case HCI_INIT_SEND_READ_LOCAL_NAME: 1611 hci_send_cmd(&hci_read_local_name); 1612 hci_stack->substate = HCI_INIT_W4_SEND_READ_LOCAL_NAME; 1613 break; 1614 case HCI_INIT_SEND_RESET_CSR_WARM_BOOT: 1615 hci_state_reset(); 1616 // prepare reset if command complete not received in 100ms 1617 btstack_run_loop_set_timer(&hci_stack->timeout, HCI_RESET_RESEND_TIMEOUT_MS); 1618 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_initialization_timeout_handler); 1619 btstack_run_loop_add_timer(&hci_stack->timeout); 1620 // send command 1621 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT; 1622 hci_send_cmd(&hci_reset); 1623 break; 1624 case HCI_INIT_SEND_RESET_ST_WARM_BOOT: 1625 hci_state_reset(); 1626 hci_stack->substate = HCI_INIT_W4_SEND_RESET_ST_WARM_BOOT; 1627 hci_send_cmd(&hci_reset); 1628 break; 1629 case HCI_INIT_SEND_BAUD_CHANGE_BCM: { 1630 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1631 hci_stack->chipset->set_baudrate_command(baud_rate, hci_stack->hci_packet_buffer); 1632 hci_stack->last_cmd_opcode = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 1633 hci_stack->substate = HCI_INIT_W4_SEND_BAUD_CHANGE_BCM; 1634 hci_send_cmd_packet(hci_stack->hci_packet_buffer, 3u + hci_stack->hci_packet_buffer[2u]); 1635 break; 1636 } 1637 case HCI_INIT_SET_BD_ADDR: 1638 log_info("Set Public BD ADDR to %s", bd_addr_to_str(hci_stack->custom_bd_addr)); 1639 hci_stack->chipset->set_bd_addr_command(hci_stack->custom_bd_addr, hci_stack->hci_packet_buffer); 1640 hci_stack->last_cmd_opcode = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 1641 hci_stack->substate = HCI_INIT_W4_SET_BD_ADDR; 1642 hci_send_cmd_packet(hci_stack->hci_packet_buffer, 3u + hci_stack->hci_packet_buffer[2u]); 1643 break; 1644 case HCI_INIT_SEND_BAUD_CHANGE: 1645 if (need_baud_change) { 1646 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1647 hci_stack->chipset->set_baudrate_command(baud_rate, hci_stack->hci_packet_buffer); 1648 hci_stack->last_cmd_opcode = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 1649 hci_stack->substate = HCI_INIT_W4_SEND_BAUD_CHANGE; 1650 hci_send_cmd_packet(hci_stack->hci_packet_buffer, 3u + hci_stack->hci_packet_buffer[2u]); 1651 // STLC25000D: baudrate change happens within 0.5 s after command was send, 1652 // use timer to update baud rate after 100 ms (knowing exactly, when command was sent is non-trivial) 1653 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_ST_MICROELECTRONICS){ 1654 btstack_run_loop_set_timer(&hci_stack->timeout, HCI_RESET_RESEND_TIMEOUT_MS); 1655 btstack_run_loop_add_timer(&hci_stack->timeout); 1656 } 1657 break; 1658 } 1659 1660 /* fall through */ 1661 1662 case HCI_INIT_CUSTOM_INIT: 1663 // Custom initialization 1664 if (hci_stack->chipset && hci_stack->chipset->next_command){ 1665 hci_stack->chipset_result = (*hci_stack->chipset->next_command)(hci_stack->hci_packet_buffer); 1666 bool send_cmd = false; 1667 switch (hci_stack->chipset_result){ 1668 case BTSTACK_CHIPSET_VALID_COMMAND: 1669 send_cmd = true; 1670 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT; 1671 break; 1672 case BTSTACK_CHIPSET_WARMSTART_REQUIRED: 1673 send_cmd = true; 1674 // CSR Warm Boot: Wait a bit, then send HCI Reset until HCI Command Complete 1675 log_info("CSR Warm Boot"); 1676 btstack_run_loop_set_timer(&hci_stack->timeout, HCI_RESET_RESEND_TIMEOUT_MS); 1677 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_initialization_timeout_handler); 1678 btstack_run_loop_add_timer(&hci_stack->timeout); 1679 if ((hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_CAMBRIDGE_SILICON_RADIO) 1680 && hci_stack->config 1681 && hci_stack->chipset 1682 // && hci_stack->chipset->set_baudrate_command -- there's no such command 1683 && hci_stack->hci_transport->set_baudrate 1684 && hci_transport_uart_get_main_baud_rate()){ 1685 hci_stack->substate = HCI_INIT_W4_SEND_BAUD_CHANGE; 1686 } else { 1687 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT_LINK_RESET; 1688 } 1689 break; 1690 default: 1691 break; 1692 } 1693 1694 if (send_cmd){ 1695 int size = 3u + hci_stack->hci_packet_buffer[2u]; 1696 hci_stack->last_cmd_opcode = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 1697 hci_dump_packet(HCI_COMMAND_DATA_PACKET, 0, hci_stack->hci_packet_buffer, size); 1698 hci_stack->hci_transport->send_packet(HCI_COMMAND_DATA_PACKET, hci_stack->hci_packet_buffer, size); 1699 break; 1700 } 1701 log_info("Init script done"); 1702 1703 // Init script download on Broadcom chipsets causes: 1704 if ( (hci_stack->chipset_result != BTSTACK_CHIPSET_NO_INIT_SCRIPT) && 1705 ( (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION) 1706 || (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_EM_MICROELECTRONIC_MARIN_SA)) ){ 1707 1708 // - baud rate to reset, restore UART baud rate if needed 1709 if (need_baud_change) { 1710 uint32_t baud_rate = ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_init; 1711 log_info("Local baud rate change to %" PRIu32 " after init script (bcm)", baud_rate); 1712 hci_stack->hci_transport->set_baudrate(baud_rate); 1713 } 1714 1715 uint16_t bcm_delay_ms = 300; 1716 // - UART may or may not be disabled during update and Controller RTS may or may not be high during this time 1717 // -> Work around: wait here. 1718 log_info("BCM delay (%u ms) after init script", bcm_delay_ms); 1719 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT_BCM_DELAY; 1720 btstack_run_loop_set_timer(&hci_stack->timeout, bcm_delay_ms); 1721 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_initialization_timeout_handler); 1722 btstack_run_loop_add_timer(&hci_stack->timeout); 1723 break; 1724 } 1725 } 1726 #endif 1727 /* fall through */ 1728 1729 case HCI_INIT_READ_LOCAL_SUPPORTED_COMMANDS: 1730 hci_stack->substate = HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS; 1731 hci_send_cmd(&hci_read_local_supported_commands); 1732 break; 1733 case HCI_INIT_READ_BD_ADDR: 1734 hci_stack->substate = HCI_INIT_W4_READ_BD_ADDR; 1735 hci_send_cmd(&hci_read_bd_addr); 1736 break; 1737 case HCI_INIT_READ_BUFFER_SIZE: 1738 // only read buffer size if supported 1739 if (hci_command_supported(SUPPORTED_HCI_COMMAND_READ_BUFFER_SIZE)){ 1740 hci_stack->substate = HCI_INIT_W4_READ_BUFFER_SIZE; 1741 hci_send_cmd(&hci_read_buffer_size); 1742 break; 1743 } 1744 1745 /* fall through */ 1746 1747 case HCI_INIT_READ_LOCAL_SUPPORTED_FEATURES: 1748 hci_stack->substate = HCI_INIT_W4_READ_LOCAL_SUPPORTED_FEATURES; 1749 hci_send_cmd(&hci_read_local_supported_features); 1750 break; 1751 1752 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 1753 case HCI_INIT_SET_CONTROLLER_TO_HOST_FLOW_CONTROL: 1754 hci_stack->substate = HCI_INIT_W4_SET_CONTROLLER_TO_HOST_FLOW_CONTROL; 1755 hci_send_cmd(&hci_set_controller_to_host_flow_control, 3); // ACL + SCO Flow Control 1756 break; 1757 case HCI_INIT_HOST_BUFFER_SIZE: 1758 hci_stack->substate = HCI_INIT_W4_HOST_BUFFER_SIZE; 1759 hci_send_cmd(&hci_host_buffer_size, HCI_HOST_ACL_PACKET_LEN, HCI_HOST_SCO_PACKET_LEN, 1760 HCI_HOST_ACL_PACKET_NUM, HCI_HOST_SCO_PACKET_NUM); 1761 break; 1762 #endif 1763 1764 case HCI_INIT_SET_EVENT_MASK: 1765 hci_stack->substate = HCI_INIT_W4_SET_EVENT_MASK; 1766 if (hci_le_supported()){ 1767 hci_send_cmd(&hci_set_event_mask,0xFFFFFFFFU, 0x3FFFFFFFU); 1768 } else { 1769 // Kensington Bluetooth 2.1 USB Dongle (CSR Chipset) returns an error for 0xffff... 1770 hci_send_cmd(&hci_set_event_mask,0xFFFFFFFFU, 0x1FFFFFFFU); 1771 } 1772 break; 1773 1774 #ifdef ENABLE_CLASSIC 1775 case HCI_INIT_WRITE_SIMPLE_PAIRING_MODE: 1776 if (hci_classic_supported() && gap_ssp_supported()){ 1777 hci_stack->substate = HCI_INIT_W4_WRITE_SIMPLE_PAIRING_MODE; 1778 hci_send_cmd(&hci_write_simple_pairing_mode, hci_stack->ssp_enable); 1779 break; 1780 } 1781 1782 /* fall through */ 1783 1784 case HCI_INIT_WRITE_INQUIRY_MODE: 1785 if (hci_classic_supported()){ 1786 hci_stack->substate = HCI_INIT_W4_WRITE_INQUIRY_MODE; 1787 hci_send_cmd(&hci_write_inquiry_mode, (int) hci_stack->inquiry_mode); 1788 break; 1789 } 1790 1791 /* fall through */ 1792 1793 case HCI_INIT_WRITE_SECURE_CONNECTIONS_HOST_ENABLE: 1794 // skip write secure connections host support if not supported or disabled 1795 if (hci_classic_supported() && hci_stack->secure_connections_enable 1796 && hci_command_supported(SUPPORTED_HCI_COMMAND_WRITE_SECURE_CONNECTIONS_HOST)) { 1797 hci_stack->secure_connections_active = true; 1798 hci_stack->substate = HCI_INIT_W4_WRITE_SECURE_CONNECTIONS_HOST_ENABLE; 1799 hci_send_cmd(&hci_write_secure_connections_host_support, 1); 1800 break; 1801 } 1802 1803 #ifdef ENABLE_SCO_OVER_HCI 1804 /* fall through */ 1805 1806 // only sent if ENABLE_SCO_OVER_HCI is defined 1807 case HCI_INIT_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE: 1808 // skip write synchronous flow control if not supported 1809 if (hci_classic_supported() 1810 && hci_command_supported(SUPPORTED_HCI_COMMAND_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE)) { 1811 hci_stack->substate = HCI_INIT_W4_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE; 1812 hci_send_cmd(&hci_write_synchronous_flow_control_enable, 1); // SCO tracking enabled 1813 break; 1814 } 1815 /* fall through */ 1816 1817 case HCI_INIT_WRITE_DEFAULT_ERRONEOUS_DATA_REPORTING: 1818 // skip write default erroneous data reporting if not supported 1819 if (hci_classic_supported() 1820 && hci_command_supported(SUPPORTED_HCI_COMMAND_WRITE_DEFAULT_ERRONEOUS_DATA_REPORTING)) { 1821 hci_stack->substate = HCI_INIT_W4_WRITE_DEFAULT_ERRONEOUS_DATA_REPORTING; 1822 hci_send_cmd(&hci_write_default_erroneous_data_reporting, 1); 1823 break; 1824 } 1825 #endif 1826 1827 #if defined(ENABLE_SCO_OVER_HCI) || defined(ENABLE_SCO_OVER_PCM) 1828 /* fall through */ 1829 1830 // only sent if manufacturer is Broadcom and ENABLE_SCO_OVER_HCI or ENABLE_SCO_OVER_PCM is defined 1831 case HCI_INIT_BCM_WRITE_SCO_PCM_INT: 1832 if (hci_classic_supported() && (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION)){ 1833 hci_stack->substate = HCI_INIT_W4_BCM_WRITE_SCO_PCM_INT; 1834 #ifdef ENABLE_SCO_OVER_HCI 1835 log_info("BCM: Route SCO data via HCI transport"); 1836 hci_send_cmd(&hci_bcm_write_sco_pcm_int, 1, 0, 0, 0, 0); 1837 #endif 1838 #ifdef ENABLE_SCO_OVER_PCM 1839 log_info("BCM: Route SCO data via PCM interface"); 1840 #ifdef ENABLE_BCM_PCM_WBS 1841 // 512 kHz bit clock for 2 channels x 16 bit x 16 kHz 1842 hci_send_cmd(&hci_bcm_write_sco_pcm_int, 0, 2, 0, 1, 1); 1843 #else 1844 // 256 kHz bit clock for 2 channels x 16 bit x 8 kHz 1845 hci_send_cmd(&hci_bcm_write_sco_pcm_int, 0, 1, 0, 1, 1); 1846 #endif 1847 #endif 1848 break; 1849 } 1850 #endif 1851 1852 #ifdef ENABLE_SCO_OVER_PCM 1853 /* fall through */ 1854 1855 case HCI_INIT_BCM_WRITE_I2SPCM_INTERFACE_PARAM: 1856 if (hci_classic_supported() && (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION)){ 1857 hci_stack->substate = HCI_INIT_W4_BCM_WRITE_I2SPCM_INTERFACE_PARAM; 1858 log_info("BCM: Config PCM interface for I2S"); 1859 #ifdef ENABLE_BCM_PCM_WBS 1860 // 512 kHz bit clock for 2 channels x 16 bit x 8 kHz 1861 hci_send_cmd(&hci_bcm_write_i2spcm_interface_param, 1, 1, 0, 2); 1862 #else 1863 // 256 kHz bit clock for 2 channels x 16 bit x 8 kHz 1864 hci_send_cmd(&hci_bcm_write_i2spcm_interface_param, 1, 1, 0, 1); 1865 #endif 1866 break; 1867 } 1868 #endif 1869 #endif 1870 1871 #ifdef ENABLE_BLE 1872 /* fall through */ 1873 1874 // LE INIT 1875 case HCI_INIT_LE_READ_BUFFER_SIZE: 1876 if (hci_le_supported()){ 1877 hci_stack->substate = HCI_INIT_W4_LE_READ_BUFFER_SIZE; 1878 hci_send_cmd(&hci_le_read_buffer_size); 1879 break; 1880 } 1881 1882 /* fall through */ 1883 1884 case HCI_INIT_WRITE_LE_HOST_SUPPORTED: 1885 // skip write le host if not supported (e.g. on LE only EM9301) 1886 if (hci_le_supported() 1887 && hci_command_supported(SUPPORTED_HCI_COMMAND_WRITE_LE_HOST_SUPPORTED)) { 1888 // LE Supported Host = 1, Simultaneous Host = 0 1889 hci_stack->substate = HCI_INIT_W4_WRITE_LE_HOST_SUPPORTED; 1890 hci_send_cmd(&hci_write_le_host_supported, 1, 0); 1891 break; 1892 } 1893 1894 /* fall through */ 1895 1896 case HCI_INIT_LE_SET_EVENT_MASK: 1897 if (hci_le_supported()){ 1898 hci_stack->substate = HCI_INIT_W4_LE_SET_EVENT_MASK; 1899 hci_send_cmd(&hci_le_set_event_mask, 0xfffffdff, 0x07); // all events from core v5.3 without LE Enhanced Connection Complete 1900 break; 1901 } 1902 #endif 1903 1904 #ifdef ENABLE_LE_DATA_LENGTH_EXTENSION 1905 /* fall through */ 1906 1907 case HCI_INIT_LE_READ_MAX_DATA_LENGTH: 1908 if (hci_le_supported() 1909 && hci_command_supported(SUPPORTED_HCI_COMMAND_LE_READ_MAXIMUM_DATA_LENGTH)) { 1910 hci_stack->substate = HCI_INIT_W4_LE_READ_MAX_DATA_LENGTH; 1911 hci_send_cmd(&hci_le_read_maximum_data_length); 1912 break; 1913 } 1914 1915 /* fall through */ 1916 1917 case HCI_INIT_LE_WRITE_SUGGESTED_DATA_LENGTH: 1918 if (hci_le_supported() 1919 && hci_command_supported(SUPPORTED_HCI_COMMAND_LE_WRITE_SUGGESTED_DEFAULT_DATA_LENGTH)) { 1920 hci_stack->substate = HCI_INIT_W4_LE_WRITE_SUGGESTED_DATA_LENGTH; 1921 hci_send_cmd(&hci_le_write_suggested_default_data_length, hci_stack->le_supported_max_tx_octets, hci_stack->le_supported_max_tx_time); 1922 break; 1923 } 1924 #endif 1925 1926 #ifdef ENABLE_LE_CENTRAL 1927 /* fall through */ 1928 1929 case HCI_INIT_READ_WHITE_LIST_SIZE: 1930 if (hci_le_supported()){ 1931 hci_stack->substate = HCI_INIT_W4_READ_WHITE_LIST_SIZE; 1932 hci_send_cmd(&hci_le_read_white_list_size); 1933 break; 1934 } 1935 1936 #endif 1937 1938 #ifdef ENABLE_LE_PERIPHERAL 1939 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 1940 /* fall through */ 1941 1942 case HCI_INIT_LE_READ_MAX_ADV_DATA_LEN: 1943 if (hci_extended_advertising_supported()){ 1944 hci_stack->substate = HCI_INIT_W4_LE_READ_MAX_ADV_DATA_LEN; 1945 hci_send_cmd(&hci_le_read_maximum_advertising_data_length); 1946 break; 1947 } 1948 #endif 1949 #endif 1950 /* fall through */ 1951 1952 case HCI_INIT_DONE: 1953 hci_stack->substate = HCI_INIT_DONE; 1954 // main init sequence complete 1955 #ifdef ENABLE_CLASSIC 1956 // check if initial Classic GAP Tasks are completed 1957 if (hci_classic_supported() && (hci_stack->gap_tasks_classic != 0)) { 1958 hci_run_gap_tasks_classic(); 1959 break; 1960 } 1961 #endif 1962 #ifdef ENABLE_BLE 1963 #ifdef ENABLE_LE_CENTRAL 1964 // check if initial LE GAP Tasks are completed 1965 if (hci_le_supported() && hci_stack->le_scanning_param_update) { 1966 hci_run_general_gap_le(); 1967 break; 1968 } 1969 #endif 1970 #endif 1971 hci_init_done(); 1972 break; 1973 1974 default: 1975 return; 1976 } 1977 } 1978 1979 static bool hci_initializing_event_handler_command_completed(const uint8_t * packet){ 1980 bool command_completed = false; 1981 if (hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_COMPLETE){ 1982 uint16_t opcode = little_endian_read_16(packet,3); 1983 if (opcode == hci_stack->last_cmd_opcode){ 1984 command_completed = true; 1985 log_debug("Command complete for expected opcode %04x at substate %u", opcode, hci_stack->substate); 1986 } else { 1987 log_info("Command complete for different opcode %04x, expected %04x, at substate %u", opcode, hci_stack->last_cmd_opcode, hci_stack->substate); 1988 } 1989 } 1990 1991 if (hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_STATUS){ 1992 uint8_t status = packet[2]; 1993 uint16_t opcode = little_endian_read_16(packet,4); 1994 if (opcode == hci_stack->last_cmd_opcode){ 1995 if (status){ 1996 command_completed = true; 1997 log_debug("Command status error 0x%02x for expected opcode %04x at substate %u", status, opcode, hci_stack->substate); 1998 } else { 1999 log_info("Command status OK for expected opcode %04x, waiting for command complete", opcode); 2000 } 2001 } else { 2002 log_debug("Command status for opcode %04x, expected %04x", opcode, hci_stack->last_cmd_opcode); 2003 } 2004 } 2005 #ifndef HAVE_HOST_CONTROLLER_API 2006 // Vendor == CSR 2007 if ((hci_stack->substate == HCI_INIT_W4_CUSTOM_INIT) && (hci_event_packet_get_type(packet) == HCI_EVENT_VENDOR_SPECIFIC)){ 2008 // TODO: track actual command 2009 command_completed = true; 2010 } 2011 2012 // Vendor == Toshiba 2013 if ((hci_stack->substate == HCI_INIT_W4_SEND_BAUD_CHANGE) && (hci_event_packet_get_type(packet) == HCI_EVENT_VENDOR_SPECIFIC)){ 2014 // TODO: track actual command 2015 command_completed = true; 2016 // Fix: no HCI Command Complete received, so num_cmd_packets not reset 2017 hci_stack->num_cmd_packets = 1; 2018 } 2019 #endif 2020 2021 return command_completed; 2022 } 2023 2024 static void hci_initializing_event_handler(const uint8_t * packet, uint16_t size){ 2025 2026 UNUSED(size); // ok: less than 6 bytes are read from our buffer 2027 2028 bool command_completed = hci_initializing_event_handler_command_completed(packet); 2029 2030 #ifndef HAVE_HOST_CONTROLLER_API 2031 2032 // Late response (> 100 ms) for HCI Reset e.g. on Toshiba TC35661: 2033 // Command complete for HCI Reset arrives after we've resent the HCI Reset command 2034 // 2035 // HCI Reset 2036 // Timeout 100 ms 2037 // HCI Reset 2038 // Command Complete Reset 2039 // HCI Read Local Version Information 2040 // Command Complete Reset - but we expected Command Complete Read Local Version Information 2041 // hang... 2042 // 2043 // Fix: Command Complete for HCI Reset in HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION trigger resend 2044 if (!command_completed 2045 && (hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_COMPLETE) 2046 && (hci_stack->substate == HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION)){ 2047 2048 uint16_t opcode = little_endian_read_16(packet,3); 2049 if (opcode == hci_reset.opcode){ 2050 hci_stack->substate = HCI_INIT_SEND_READ_LOCAL_VERSION_INFORMATION; 2051 return; 2052 } 2053 } 2054 2055 // CSR & H5 2056 // Fix: Command Complete for HCI Reset in HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION trigger resend 2057 if (!command_completed 2058 && (hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_COMPLETE) 2059 && (hci_stack->substate == HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS)){ 2060 2061 uint16_t opcode = little_endian_read_16(packet,3); 2062 if (opcode == hci_reset.opcode){ 2063 hci_stack->substate = HCI_INIT_READ_LOCAL_SUPPORTED_COMMANDS; 2064 return; 2065 } 2066 } 2067 2068 // on CSR with BCSP/H5, the reset resend timeout leads to substate == HCI_INIT_SEND_RESET or HCI_INIT_SEND_RESET_CSR_WARM_BOOT 2069 // fix: Correct substate and behave as command below 2070 if (command_completed){ 2071 switch (hci_stack->substate){ 2072 case HCI_INIT_SEND_RESET: 2073 hci_stack->substate = HCI_INIT_W4_SEND_RESET; 2074 break; 2075 case HCI_INIT_SEND_RESET_CSR_WARM_BOOT: 2076 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT; 2077 break; 2078 default: 2079 break; 2080 } 2081 } 2082 2083 #endif 2084 2085 if (!command_completed) return; 2086 2087 bool need_baud_change = false; 2088 bool need_addr_change = false; 2089 2090 #ifndef HAVE_HOST_CONTROLLER_API 2091 need_baud_change = hci_stack->config 2092 && hci_stack->chipset 2093 && hci_stack->chipset->set_baudrate_command 2094 && hci_stack->hci_transport->set_baudrate 2095 && ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_main; 2096 2097 need_addr_change = hci_stack->custom_bd_addr_set 2098 && hci_stack->chipset 2099 && hci_stack->chipset->set_bd_addr_command; 2100 #endif 2101 2102 switch(hci_stack->substate){ 2103 2104 #ifndef HAVE_HOST_CONTROLLER_API 2105 case HCI_INIT_SEND_RESET: 2106 // on CSR with BCSP/H5, resend triggers resend of HCI Reset and leads to substate == HCI_INIT_SEND_RESET 2107 // fix: just correct substate and behave as command below 2108 2109 /* fall through */ 2110 #endif 2111 2112 case HCI_INIT_W4_SEND_RESET: 2113 btstack_run_loop_remove_timer(&hci_stack->timeout); 2114 hci_stack->substate = HCI_INIT_SEND_READ_LOCAL_VERSION_INFORMATION; 2115 return; 2116 2117 #ifndef HAVE_HOST_CONTROLLER_API 2118 case HCI_INIT_W4_SEND_BAUD_CHANGE: 2119 // for STLC2500D, baud rate change already happened. 2120 // for others, baud rate gets changed now 2121 if ((hci_stack->manufacturer != BLUETOOTH_COMPANY_ID_ST_MICROELECTRONICS) && need_baud_change){ 2122 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 2123 log_info("Local baud rate change to %" PRIu32 "(w4_send_baud_change)", baud_rate); 2124 hci_stack->hci_transport->set_baudrate(baud_rate); 2125 } 2126 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 2127 return; 2128 case HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT: 2129 btstack_run_loop_remove_timer(&hci_stack->timeout); 2130 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 2131 return; 2132 case HCI_INIT_W4_CUSTOM_INIT: 2133 // repeat custom init 2134 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 2135 return; 2136 #endif 2137 2138 case HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS: 2139 if (need_baud_change && (hci_stack->chipset_result != BTSTACK_CHIPSET_NO_INIT_SCRIPT) && 2140 ((hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION) || 2141 (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_EM_MICROELECTRONIC_MARIN_SA))) { 2142 hci_stack->substate = HCI_INIT_SEND_BAUD_CHANGE_BCM; 2143 return; 2144 } 2145 if (need_addr_change){ 2146 hci_stack->substate = HCI_INIT_SET_BD_ADDR; 2147 return; 2148 } 2149 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 2150 return; 2151 #ifndef HAVE_HOST_CONTROLLER_API 2152 case HCI_INIT_W4_SEND_BAUD_CHANGE_BCM: 2153 if (need_baud_change){ 2154 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 2155 log_info("Local baud rate change to %" PRIu32 "(w4_send_baud_change_bcm))", baud_rate); 2156 hci_stack->hci_transport->set_baudrate(baud_rate); 2157 } 2158 if (need_addr_change){ 2159 hci_stack->substate = HCI_INIT_SET_BD_ADDR; 2160 return; 2161 } 2162 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 2163 return; 2164 case HCI_INIT_W4_SET_BD_ADDR: 2165 // for STLC2500D + ATWILC3000, bd addr change only gets active after sending reset command 2166 if ((hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_ST_MICROELECTRONICS) 2167 || (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_ATMEL_CORPORATION)){ 2168 hci_stack->substate = HCI_INIT_SEND_RESET_ST_WARM_BOOT; 2169 return; 2170 } 2171 // skipping st warm boot 2172 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 2173 return; 2174 case HCI_INIT_W4_SEND_RESET_ST_WARM_BOOT: 2175 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 2176 return; 2177 #endif 2178 2179 case HCI_INIT_DONE: 2180 // set state if we came here by fall through 2181 hci_stack->substate = HCI_INIT_DONE; 2182 return; 2183 2184 default: 2185 break; 2186 } 2187 hci_initializing_next_state(); 2188 } 2189 2190 static void hci_handle_connection_failed(hci_connection_t * conn, uint8_t status){ 2191 // CC2564C might emit Connection Complete for rejected incoming SCO connection 2192 // To prevent accidentally free'ing the CHI connection for the ACL connection, 2193 // check if the hci connection has been outgoing 2194 switch (conn->state){ 2195 case SEND_CREATE_CONNECTION: 2196 case RECEIVED_CONNECTION_REQUEST: 2197 break; 2198 default: 2199 return; 2200 } 2201 2202 log_info("Outgoing connection to %s failed", bd_addr_to_str(conn->address)); 2203 bd_addr_t bd_address; 2204 (void)memcpy(&bd_address, conn->address, 6); 2205 2206 #ifdef ENABLE_CLASSIC 2207 // cache needed data 2208 int notify_dedicated_bonding_failed = conn->bonding_flags & BONDING_DEDICATED; 2209 #endif 2210 2211 // connection failed, remove entry 2212 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 2213 btstack_memory_hci_connection_free( conn ); 2214 2215 #ifdef ENABLE_CLASSIC 2216 // notify client if dedicated bonding 2217 if (notify_dedicated_bonding_failed){ 2218 log_info("hci notify_dedicated_bonding_failed"); 2219 hci_emit_dedicated_bonding_result(bd_address, status); 2220 } 2221 2222 // if authentication error, also delete link key 2223 if (status == ERROR_CODE_AUTHENTICATION_FAILURE) { 2224 gap_drop_link_key_for_bd_addr(bd_address); 2225 } 2226 #else 2227 UNUSED(status); 2228 #endif 2229 } 2230 2231 #ifdef ENABLE_CLASSIC 2232 static void hci_handle_remote_features_page_0(hci_connection_t * conn, const uint8_t * features){ 2233 // SSP Controller 2234 if (features[6] & (1 << 3)){ 2235 conn->bonding_flags |= BONDING_REMOTE_SUPPORTS_SSP_CONTROLLER; 2236 } 2237 // eSCO 2238 if (features[3] & (1<<7)){ 2239 conn->remote_supported_features[0] |= 1; 2240 } 2241 // Extended features 2242 if (features[7] & (1<<7)){ 2243 conn->remote_supported_features[0] |= 2; 2244 } 2245 } 2246 2247 static void hci_handle_remote_features_page_1(hci_connection_t * conn, const uint8_t * features){ 2248 // SSP Host 2249 if (features[0] & (1 << 0)){ 2250 conn->bonding_flags |= BONDING_REMOTE_SUPPORTS_SSP_HOST; 2251 } 2252 // SC Host 2253 if (features[0] & (1 << 3)){ 2254 conn->bonding_flags |= BONDING_REMOTE_SUPPORTS_SC_HOST; 2255 } 2256 } 2257 2258 static void hci_handle_remote_features_page_2(hci_connection_t * conn, const uint8_t * features){ 2259 // SC Controller 2260 if (features[1] & (1 << 0)){ 2261 conn->bonding_flags |= BONDING_REMOTE_SUPPORTS_SC_CONTROLLER; 2262 } 2263 } 2264 2265 static void hci_handle_remote_features_received(hci_connection_t * conn){ 2266 conn->bonding_flags &= ~BONDING_REMOTE_FEATURES_QUERY_ACTIVE; 2267 conn->bonding_flags |= BONDING_RECEIVED_REMOTE_FEATURES; 2268 log_info("Remote features %02x, bonding flags %x", conn->remote_supported_features[0], conn->bonding_flags); 2269 if (conn->bonding_flags & BONDING_DEDICATED){ 2270 conn->bonding_flags |= BONDING_SEND_AUTHENTICATE_REQUEST; 2271 } 2272 } 2273 static bool hci_remote_sc_enabled(hci_connection_t * connection){ 2274 const uint16_t sc_enabled_mask = BONDING_REMOTE_SUPPORTS_SC_HOST | BONDING_REMOTE_SUPPORTS_SC_CONTROLLER; 2275 return (connection->bonding_flags & sc_enabled_mask) == sc_enabled_mask; 2276 } 2277 2278 #endif 2279 2280 static void handle_event_for_current_stack_state(const uint8_t * packet, uint16_t size) { 2281 // handle BT initialization 2282 if (hci_stack->state == HCI_STATE_INITIALIZING) { 2283 hci_initializing_event_handler(packet, size); 2284 } 2285 2286 // help with BT sleep 2287 if ((hci_stack->state == HCI_STATE_FALLING_ASLEEP) 2288 && (hci_stack->substate == HCI_FALLING_ASLEEP_W4_WRITE_SCAN_ENABLE) 2289 && (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_write_scan_enable))) { 2290 hci_initializing_next_state(); 2291 } 2292 } 2293 2294 #ifdef ENABLE_CLASSIC 2295 static void hci_handle_read_encryption_key_size_complete(hci_connection_t * conn, uint8_t encryption_key_size) { 2296 conn->authentication_flags |= AUTH_FLAG_CONNECTION_ENCRYPTED; 2297 conn->encryption_key_size = encryption_key_size; 2298 2299 if ((conn->authentication_flags & AUTH_FLAG_CONNECTION_AUTHENTICATED) != 0) { 2300 conn->requested_security_level = LEVEL_0; 2301 hci_emit_security_level(conn->con_handle, gap_security_level_for_connection(conn)); 2302 return; 2303 } 2304 2305 // Request remote features if not already done 2306 hci_trigger_remote_features_for_connection(conn); 2307 2308 // Request Authentication if not already done 2309 if ((conn->bonding_flags & BONDING_SENT_AUTHENTICATE_REQUEST) != 0) return; 2310 conn->bonding_flags |= BONDING_SEND_AUTHENTICATE_REQUEST; 2311 } 2312 #endif 2313 2314 static void hci_store_local_supported_commands(const uint8_t * packet){ 2315 // create mapping table 2316 #define X(name, offset, bit) { offset, bit }, 2317 static struct { 2318 uint8_t byte_offset; 2319 uint8_t bit_position; 2320 } supported_hci_commands_map [] = { 2321 SUPPORTED_HCI_COMMANDS 2322 }; 2323 #undef X 2324 2325 // create names for debug purposes 2326 #ifdef ENABLE_LOG_DEBUG 2327 #define X(name, offset, bit) #name, 2328 static const char * command_names[] = { 2329 SUPPORTED_HCI_COMMANDS 2330 }; 2331 #undef X 2332 #endif 2333 2334 hci_stack->local_supported_commands = 0; 2335 const uint8_t * commands_map = &packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1]; 2336 uint16_t i; 2337 for (i = 0 ; i < SUPPORTED_HCI_COMMANDS_COUNT ; i++){ 2338 if ((commands_map[supported_hci_commands_map[i].byte_offset] & (1 << supported_hci_commands_map[i].bit_position)) != 0){ 2339 #ifdef ENABLE_LOG_DEBUG 2340 log_info("Command %s (%u) supported %u/%u", command_names[i], i, supported_hci_commands_map[i].byte_offset, supported_hci_commands_map[i].bit_position); 2341 #else 2342 log_info("Command 0x%02x supported %u/%u", i, supported_hci_commands_map[i].byte_offset, supported_hci_commands_map[i].bit_position); 2343 #endif 2344 hci_stack->local_supported_commands |= (1LU << i); 2345 } 2346 } 2347 log_info("Local supported commands summary %04x", hci_stack->local_supported_commands); 2348 } 2349 2350 static void handle_command_complete_event(uint8_t * packet, uint16_t size){ 2351 UNUSED(size); 2352 2353 uint16_t manufacturer; 2354 #ifdef ENABLE_CLASSIC 2355 hci_con_handle_t handle; 2356 hci_connection_t * conn; 2357 uint8_t status; 2358 #endif 2359 // get num cmd packets - limit to 1 to reduce complexity 2360 hci_stack->num_cmd_packets = packet[2] ? 1 : 0; 2361 2362 uint16_t opcode = hci_event_command_complete_get_command_opcode(packet); 2363 switch (opcode){ 2364 case HCI_OPCODE_HCI_READ_LOCAL_NAME: 2365 if (packet[5]) break; 2366 // terminate, name 248 chars 2367 packet[6+248] = 0; 2368 log_info("local name: %s", &packet[6]); 2369 break; 2370 case HCI_OPCODE_HCI_READ_BUFFER_SIZE: 2371 // "The HC_ACL_Data_Packet_Length return parameter will be used to determine the size of the L2CAP segments contained in ACL Data Packets" 2372 if (hci_stack->state == HCI_STATE_INITIALIZING) { 2373 uint16_t acl_len = little_endian_read_16(packet, 6); 2374 uint16_t sco_len = packet[8]; 2375 2376 // determine usable ACL/SCO payload size 2377 hci_stack->acl_data_packet_length = btstack_min(acl_len, HCI_ACL_PAYLOAD_SIZE); 2378 hci_stack->sco_data_packet_length = btstack_min(sco_len, HCI_ACL_PAYLOAD_SIZE); 2379 2380 hci_stack->acl_packets_total_num = little_endian_read_16(packet, 9); 2381 hci_stack->sco_packets_total_num = little_endian_read_16(packet, 11); 2382 2383 log_info("hci_read_buffer_size: ACL size module %u -> used %u, count %u / SCO size %u, count %u", 2384 acl_len, hci_stack->acl_data_packet_length, hci_stack->acl_packets_total_num, 2385 hci_stack->sco_data_packet_length, hci_stack->sco_packets_total_num); 2386 } 2387 break; 2388 case HCI_OPCODE_HCI_READ_RSSI: 2389 if (packet[5] == ERROR_CODE_SUCCESS){ 2390 uint8_t event[5]; 2391 event[0] = GAP_EVENT_RSSI_MEASUREMENT; 2392 event[1] = 3; 2393 (void)memcpy(&event[2], &packet[6], 3); 2394 hci_emit_event(event, sizeof(event), 1); 2395 } 2396 break; 2397 #ifdef ENABLE_BLE 2398 case HCI_OPCODE_HCI_LE_READ_BUFFER_SIZE: 2399 hci_stack->le_data_packets_length = little_endian_read_16(packet, 6); 2400 hci_stack->le_acl_packets_total_num = packet[8]; 2401 // determine usable ACL payload size 2402 if (HCI_ACL_PAYLOAD_SIZE < hci_stack->le_data_packets_length){ 2403 hci_stack->le_data_packets_length = HCI_ACL_PAYLOAD_SIZE; 2404 } 2405 log_info("hci_le_read_buffer_size: size %u, count %u", hci_stack->le_data_packets_length, hci_stack->le_acl_packets_total_num); 2406 break; 2407 #endif 2408 #ifdef ENABLE_LE_DATA_LENGTH_EXTENSION 2409 case HCI_OPCODE_HCI_LE_READ_MAXIMUM_DATA_LENGTH: 2410 hci_stack->le_supported_max_tx_octets = little_endian_read_16(packet, 6); 2411 hci_stack->le_supported_max_tx_time = little_endian_read_16(packet, 8); 2412 log_info("hci_le_read_maximum_data_length: tx octets %u, tx time %u us", hci_stack->le_supported_max_tx_octets, hci_stack->le_supported_max_tx_time); 2413 break; 2414 #endif 2415 #ifdef ENABLE_LE_CENTRAL 2416 case HCI_OPCODE_HCI_LE_READ_WHITE_LIST_SIZE: 2417 hci_stack->le_whitelist_capacity = packet[6]; 2418 log_info("hci_le_read_white_list_size: size %u", hci_stack->le_whitelist_capacity); 2419 break; 2420 #endif 2421 #ifdef ENABLE_LE_PERIPHERAL 2422 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 2423 case HCI_OPCODE_HCI_LE_READ_MAXIMUM_ADVERTISING_DATA_LENGTH: 2424 hci_stack->le_maximum_advertising_data_length = little_endian_read_16(packet, 6); 2425 break; 2426 case HCI_OPCODE_HCI_LE_SET_EXTENDED_ADVERTISING_PARAMETERS: 2427 if (hci_stack->le_advertising_set_in_current_command != 0) { 2428 le_advertising_set_t * advertising_set = hci_advertising_set_for_handle(hci_stack->le_advertising_set_in_current_command); 2429 hci_stack->le_advertising_set_in_current_command = 0; 2430 if (advertising_set == NULL) break; 2431 uint8_t adv_status = packet[6]; 2432 uint8_t tx_power = packet[7]; 2433 uint8_t event[] = { HCI_EVENT_META_GAP, 4, GAP_SUBEVENT_ADVERTISING_SET_INSTALLED, hci_stack->le_advertising_set_in_current_command, adv_status, tx_power }; 2434 if (adv_status == 0){ 2435 advertising_set->state |= LE_ADVERTISEMENT_STATE_PARAMS_SET; 2436 } 2437 hci_emit_event(event, sizeof(event), 1); 2438 } 2439 break; 2440 case HCI_OPCODE_HCI_LE_REMOVE_ADVERTISING_SET: 2441 if (hci_stack->le_advertising_set_in_current_command != 0) { 2442 le_advertising_set_t * advertising_set = hci_advertising_set_for_handle(hci_stack->le_advertising_set_in_current_command); 2443 hci_stack->le_advertising_set_in_current_command = 0; 2444 if (advertising_set == NULL) break; 2445 uint8_t adv_status = packet[5]; 2446 uint8_t event[] = { HCI_EVENT_META_GAP, 3, GAP_SUBEVENT_ADVERTISING_SET_REMOVED, hci_stack->le_advertising_set_in_current_command, adv_status }; 2447 if (adv_status == 0){ 2448 btstack_linked_list_remove(&hci_stack->le_advertising_sets, (btstack_linked_item_t *) advertising_set); 2449 } 2450 hci_emit_event(event, sizeof(event), 1); 2451 } 2452 break; 2453 #endif 2454 #endif 2455 case HCI_OPCODE_HCI_READ_BD_ADDR: 2456 reverse_bd_addr(&packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE + 1], hci_stack->local_bd_addr); 2457 log_info("Local Address, Status: 0x%02x: Addr: %s", packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE], bd_addr_to_str(hci_stack->local_bd_addr)); 2458 #ifdef ENABLE_CLASSIC 2459 if (hci_stack->link_key_db){ 2460 hci_stack->link_key_db->set_local_bd_addr(hci_stack->local_bd_addr); 2461 } 2462 #endif 2463 break; 2464 #ifdef ENABLE_CLASSIC 2465 case HCI_OPCODE_HCI_WRITE_SCAN_ENABLE: 2466 hci_emit_discoverable_enabled(hci_stack->discoverable); 2467 break; 2468 case HCI_OPCODE_HCI_INQUIRY_CANCEL: 2469 if (hci_stack->inquiry_state == GAP_INQUIRY_STATE_W4_CANCELLED){ 2470 hci_stack->inquiry_state = GAP_INQUIRY_STATE_IDLE; 2471 uint8_t event[] = { GAP_EVENT_INQUIRY_COMPLETE, 1, 0}; 2472 hci_emit_event(event, sizeof(event), 1); 2473 } 2474 break; 2475 #endif 2476 case HCI_OPCODE_HCI_READ_LOCAL_SUPPORTED_FEATURES: 2477 (void)memcpy(hci_stack->local_supported_features, &packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE + 1], 8); 2478 2479 #ifdef ENABLE_CLASSIC 2480 // determine usable ACL packet types based on host buffer size and supported features 2481 hci_stack->packet_types = hci_acl_packet_types_for_buffer_size_and_local_features(HCI_ACL_PAYLOAD_SIZE, &hci_stack->local_supported_features[0]); 2482 log_info("Packet types %04x, eSCO %u", hci_stack->packet_types, hci_extended_sco_link_supported()); 2483 #endif 2484 // Classic/LE 2485 log_info("BR/EDR support %u, LE support %u", hci_classic_supported(), hci_le_supported()); 2486 break; 2487 case HCI_OPCODE_HCI_READ_LOCAL_VERSION_INFORMATION: 2488 manufacturer = little_endian_read_16(packet, 10); 2489 // map Cypress to Broadcom 2490 if (manufacturer == BLUETOOTH_COMPANY_ID_CYPRESS_SEMICONDUCTOR){ 2491 log_info("Treat Cypress as Broadcom"); 2492 manufacturer = BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION; 2493 little_endian_store_16(packet, 10, manufacturer); 2494 } 2495 hci_stack->manufacturer = manufacturer; 2496 log_info("Manufacturer: 0x%04x", hci_stack->manufacturer); 2497 break; 2498 case HCI_OPCODE_HCI_READ_LOCAL_SUPPORTED_COMMANDS: 2499 hci_store_local_supported_commands(packet); 2500 break; 2501 #ifdef ENABLE_CLASSIC 2502 case HCI_OPCODE_HCI_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE: 2503 if (packet[5]) return; 2504 hci_stack->synchronous_flow_control_enabled = 1; 2505 break; 2506 case HCI_OPCODE_HCI_READ_ENCRYPTION_KEY_SIZE: 2507 status = packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE]; 2508 handle = little_endian_read_16(packet, OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1); 2509 conn = hci_connection_for_handle(handle); 2510 if (conn != NULL) { 2511 uint8_t key_size = 0; 2512 if (status == 0){ 2513 key_size = packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+3]; 2514 log_info("Handle %04x key Size: %u", handle, key_size); 2515 } else { 2516 key_size = 1; 2517 log_info("Read Encryption Key Size failed 0x%02x-> assuming insecure connection with key size of 1", status); 2518 } 2519 hci_handle_read_encryption_key_size_complete(conn, key_size); 2520 } 2521 break; 2522 // assert pairing complete event is emitted. 2523 // note: for SSP, Simple Pairing Complete Event is sufficient, but we want to be more robust 2524 case HCI_OPCODE_HCI_PIN_CODE_REQUEST_NEGATIVE_REPLY: 2525 case HCI_OPCODE_HCI_USER_PASSKEY_REQUEST_NEGATIVE_REPLY: 2526 case HCI_OPCODE_HCI_USER_CONFIRMATION_REQUEST_NEGATIVE_REPLY: 2527 hci_stack->gap_pairing_state = GAP_PAIRING_STATE_IDLE; 2528 // lookup connection by gap pairing addr 2529 conn = hci_connection_for_bd_addr_and_type(hci_stack->gap_pairing_addr, BD_ADDR_TYPE_ACL); 2530 if (conn == NULL) break; 2531 hci_pairing_complete(conn, ERROR_CODE_AUTHENTICATION_FAILURE); 2532 break; 2533 2534 #ifdef ENABLE_CLASSIC_PAIRING_OOB 2535 case HCI_OPCODE_HCI_READ_LOCAL_OOB_DATA: 2536 case HCI_OPCODE_HCI_READ_LOCAL_EXTENDED_OOB_DATA:{ 2537 uint8_t event[67]; 2538 event[0] = GAP_EVENT_LOCAL_OOB_DATA; 2539 event[1] = 65; 2540 (void)memset(&event[2], 0, 65); 2541 if (packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE] == ERROR_CODE_SUCCESS){ 2542 (void)memcpy(&event[3], &packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1], 32); 2543 if (opcode == HCI_OPCODE_HCI_READ_LOCAL_EXTENDED_OOB_DATA){ 2544 event[2] = 3; 2545 (void)memcpy(&event[35], &packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+33], 32); 2546 } else { 2547 event[2] = 1; 2548 } 2549 } 2550 hci_emit_event(event, sizeof(event), 0); 2551 break; 2552 } 2553 2554 // note: only needed if user does not provide OOB data 2555 case HCI_OPCODE_HCI_REMOTE_OOB_DATA_REQUEST_NEGATIVE_REPLY: 2556 conn = hci_connection_for_handle(hci_stack->classic_oob_con_handle); 2557 hci_stack->classic_oob_con_handle = HCI_CON_HANDLE_INVALID; 2558 if (conn == NULL) break; 2559 hci_pairing_complete(conn, ERROR_CODE_AUTHENTICATION_FAILURE); 2560 break; 2561 #endif 2562 #endif 2563 default: 2564 break; 2565 } 2566 } 2567 2568 #ifdef ENABLE_BLE 2569 static void event_handle_le_connection_complete(const uint8_t * packet){ 2570 bd_addr_t addr; 2571 bd_addr_type_t addr_type; 2572 hci_connection_t * conn; 2573 2574 // Connection management 2575 reverse_bd_addr(&packet[8], addr); 2576 addr_type = (bd_addr_type_t)packet[7]; 2577 log_info("LE Connection_complete (status=%u) type %u, %s", packet[3], addr_type, bd_addr_to_str(addr)); 2578 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 2579 2580 #ifdef ENABLE_LE_CENTRAL 2581 // handle error: error is reported only to the initiator -> outgoing connection 2582 if (packet[3]){ 2583 2584 // handle cancelled outgoing connection 2585 // "If the cancellation was successful then, after the Command Complete event for the LE_Create_Connection_Cancel command, 2586 // either an LE Connection Complete or an LE Enhanced Connection Complete event shall be generated. 2587 // In either case, the event shall be sent with the error code Unknown Connection Identifier (0x02)." 2588 if (packet[3] == ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER){ 2589 // reset state 2590 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 2591 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 2592 // get outgoing connection conn struct for direct connect 2593 conn = gap_get_outgoing_connection(); 2594 } 2595 2596 // outgoing le connection establishment is done 2597 if (conn){ 2598 // remove entry 2599 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 2600 btstack_memory_hci_connection_free( conn ); 2601 } 2602 return; 2603 } 2604 #endif 2605 2606 // on success, both hosts receive connection complete event 2607 if (packet[6] == HCI_ROLE_MASTER){ 2608 #ifdef ENABLE_LE_CENTRAL 2609 // if we're master on an le connection, it was an outgoing connection and we're done with it 2610 // note: no hci_connection_t object exists yet for connect with whitelist 2611 if (hci_is_le_connection_type(addr_type)){ 2612 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 2613 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 2614 } 2615 #endif 2616 } else { 2617 #ifdef ENABLE_LE_PERIPHERAL 2618 // if we're slave, it was an incoming connection, advertisements have stopped 2619 hci_stack->le_advertisements_state &= ~LE_ADVERTISEMENT_STATE_ACTIVE; 2620 #endif 2621 } 2622 2623 // LE connections are auto-accepted, so just create a connection if there isn't one already 2624 if (!conn){ 2625 conn = create_connection_for_bd_addr_and_type(addr, addr_type); 2626 } 2627 2628 // no memory, sorry. 2629 if (!conn){ 2630 return; 2631 } 2632 2633 conn->state = OPEN; 2634 conn->role = packet[6]; 2635 conn->con_handle = hci_subevent_le_connection_complete_get_connection_handle(packet); 2636 conn->le_connection_interval = hci_subevent_le_connection_complete_get_conn_interval(packet); 2637 2638 #ifdef ENABLE_LE_PERIPHERAL 2639 if (packet[6] == HCI_ROLE_SLAVE){ 2640 hci_update_advertisements_enabled_for_current_roles(); 2641 } 2642 #endif 2643 2644 // init unenhanced att bearer mtu 2645 conn->att_connection.mtu = ATT_DEFAULT_MTU; 2646 conn->att_connection.mtu_exchanged = false; 2647 2648 // TODO: store - role, peer address type, conn_interval, conn_latency, supervision timeout, master clock 2649 2650 // restart timer 2651 // btstack_run_loop_set_timer(&conn->timeout, HCI_CONNECTION_TIMEOUT_MS); 2652 // btstack_run_loop_add_timer(&conn->timeout); 2653 2654 log_info("New connection: handle %u, %s", conn->con_handle, bd_addr_to_str(conn->address)); 2655 2656 hci_emit_nr_connections_changed(); 2657 } 2658 #endif 2659 2660 #ifdef ENABLE_CLASSIC 2661 static bool hci_ssp_security_level_possible_for_io_cap(gap_security_level_t level, uint8_t io_cap_local, uint8_t io_cap_remote){ 2662 if (io_cap_local == SSP_IO_CAPABILITY_UNKNOWN) return false; 2663 // LEVEL_4 is tested by l2cap 2664 // LEVEL 3 requires MITM protection -> check io capabilities if Authenticated is possible 2665 // @see: Core Spec v5.3, Vol 3, Part C, Table 5.7 2666 if (level >= LEVEL_3){ 2667 // MITM not possible without keyboard or display 2668 if (io_cap_remote >= SSP_IO_CAPABILITY_NO_INPUT_NO_OUTPUT) return false; 2669 if (io_cap_local >= SSP_IO_CAPABILITY_NO_INPUT_NO_OUTPUT) return false; 2670 2671 // MITM possible if one side has keyboard and the other has keyboard or display 2672 if (io_cap_remote == SSP_IO_CAPABILITY_KEYBOARD_ONLY) return true; 2673 if (io_cap_local == SSP_IO_CAPABILITY_KEYBOARD_ONLY) return true; 2674 2675 // MITM not possible if one side has only display and other side has no keyboard 2676 if (io_cap_remote == SSP_IO_CAPABILITY_DISPLAY_ONLY) return false; 2677 if (io_cap_local == SSP_IO_CAPABILITY_DISPLAY_ONLY) return false; 2678 } 2679 // LEVEL 2 requires SSP, which is a given 2680 return true; 2681 } 2682 2683 static bool btstack_is_null(uint8_t * data, uint16_t size){ 2684 uint16_t i; 2685 for (i=0; i < size ; i++){ 2686 if (data[i] != 0) { 2687 return false; 2688 } 2689 } 2690 return true; 2691 } 2692 2693 static void hci_ssp_assess_security_on_io_cap_request(hci_connection_t * conn){ 2694 // get requested security level 2695 gap_security_level_t requested_security_level = conn->requested_security_level; 2696 if (hci_stack->gap_secure_connections_only_mode){ 2697 requested_security_level = LEVEL_4; 2698 } 2699 2700 // assess security: LEVEL 4 requires SC 2701 // skip this preliminary test if remote features are not available yet to work around potential issue in ESP32 controller 2702 if ((requested_security_level == LEVEL_4) && 2703 ((conn->bonding_flags & BONDING_RECEIVED_REMOTE_FEATURES) != 0) && 2704 !hci_remote_sc_enabled(conn)){ 2705 log_info("Level 4 required, but SC not supported -> abort"); 2706 hci_pairing_complete(conn, ERROR_CODE_INSUFFICIENT_SECURITY); 2707 connectionSetAuthenticationFlags(conn, AUTH_FLAG_SEND_IO_CAPABILITIES_NEGATIVE_REPLY); 2708 return; 2709 } 2710 2711 // assess security based on io capabilities 2712 if (conn->authentication_flags & AUTH_FLAG_RECV_IO_CAPABILITIES_RESPONSE){ 2713 // responder: fully validate io caps of both sides as well as OOB data 2714 bool security_possible = false; 2715 security_possible = hci_ssp_security_level_possible_for_io_cap(requested_security_level, hci_stack->ssp_io_capability, conn->io_cap_response_io); 2716 2717 #ifdef ENABLE_CLASSIC_PAIRING_OOB 2718 // We assume that both Controller can reach LEVEL 4, if one side has received P-192 and the other has received P-256, 2719 // so we merge the OOB data availability 2720 uint8_t have_oob_data = conn->io_cap_response_oob_data; 2721 if (conn->classic_oob_c_192 != NULL){ 2722 have_oob_data |= 1; 2723 } 2724 if (conn->classic_oob_c_256 != NULL){ 2725 have_oob_data |= 2; 2726 } 2727 // for up to Level 3, either P-192 as well as P-256 will do 2728 // if we don't support SC, then a) conn->classic_oob_c_256 will be NULL and b) remote should not report P-256 available 2729 // if remote does not SC, we should not receive P-256 data either 2730 if ((requested_security_level <= LEVEL_3) && (have_oob_data != 0)){ 2731 security_possible = true; 2732 } 2733 // for Level 4, P-256 is needed 2734 if ((requested_security_level == LEVEL_4 && ((have_oob_data & 2) != 0))){ 2735 security_possible = true; 2736 } 2737 #endif 2738 2739 if (security_possible == false){ 2740 log_info("IOCap/OOB insufficient for level %u -> abort", requested_security_level); 2741 hci_pairing_complete(conn, ERROR_CODE_INSUFFICIENT_SECURITY); 2742 connectionSetAuthenticationFlags(conn, AUTH_FLAG_SEND_IO_CAPABILITIES_NEGATIVE_REPLY); 2743 return; 2744 } 2745 } else { 2746 // initiator: remote io cap not yet, only check if we have ability for MITM protection if requested and OOB is not supported 2747 #ifndef ENABLE_CLASSIC_PAIRING_OOB 2748 #ifndef ENABLE_EXPLICIT_IO_CAPABILITIES_REPLY 2749 if ((conn->requested_security_level >= LEVEL_3) && (hci_stack->ssp_io_capability >= SSP_IO_CAPABILITY_NO_INPUT_NO_OUTPUT)){ 2750 log_info("Level 3+ required, but no input/output -> abort"); 2751 hci_pairing_complete(conn, ERROR_CODE_INSUFFICIENT_SECURITY); 2752 connectionSetAuthenticationFlags(conn, AUTH_FLAG_SEND_IO_CAPABILITIES_NEGATIVE_REPLY); 2753 return; 2754 } 2755 #endif 2756 #endif 2757 } 2758 2759 #ifndef ENABLE_EXPLICIT_IO_CAPABILITIES_REPLY 2760 if (hci_stack->ssp_io_capability != SSP_IO_CAPABILITY_UNKNOWN){ 2761 connectionSetAuthenticationFlags(conn, AUTH_FLAG_SEND_IO_CAPABILITIES_REPLY); 2762 } else { 2763 connectionSetAuthenticationFlags(conn, AUTH_FLAG_SEND_IO_CAPABILITIES_NEGATIVE_REPLY); 2764 } 2765 #endif 2766 } 2767 2768 #endif 2769 2770 static void event_handler(uint8_t *packet, uint16_t size){ 2771 2772 uint16_t event_length = packet[1]; 2773 2774 // assert packet is complete 2775 if (size != (event_length + 2u)){ 2776 log_error("event_handler called with packet of wrong size %d, expected %u => dropping packet", size, event_length + 2); 2777 return; 2778 } 2779 2780 bd_addr_type_t addr_type; 2781 hci_con_handle_t handle; 2782 hci_connection_t * conn; 2783 int i; 2784 int create_connection_cmd; 2785 2786 #ifdef ENABLE_CLASSIC 2787 hci_link_type_t link_type; 2788 bd_addr_t addr; 2789 #endif 2790 2791 // log_info("HCI:EVENT:%02x", hci_event_packet_get_type(packet)); 2792 2793 switch (hci_event_packet_get_type(packet)) { 2794 2795 case HCI_EVENT_COMMAND_COMPLETE: 2796 handle_command_complete_event(packet, size); 2797 break; 2798 2799 case HCI_EVENT_COMMAND_STATUS: 2800 // get num cmd packets - limit to 1 to reduce complexity 2801 hci_stack->num_cmd_packets = packet[3] ? 1 : 0; 2802 2803 // check command status to detected failed outgoing connections 2804 create_connection_cmd = 0; 2805 #ifdef ENABLE_CLASSIC 2806 if (HCI_EVENT_IS_COMMAND_STATUS(packet, hci_create_connection)){ 2807 create_connection_cmd = 1; 2808 } 2809 if (HCI_EVENT_IS_COMMAND_STATUS(packet, hci_accept_synchronous_connection)){ 2810 create_connection_cmd = 1; 2811 } 2812 #endif 2813 #ifdef ENABLE_LE_CENTRAL 2814 if (HCI_EVENT_IS_COMMAND_STATUS(packet, hci_le_create_connection)){ 2815 create_connection_cmd = 1; 2816 } 2817 #endif 2818 if (create_connection_cmd) { 2819 uint8_t status = hci_event_command_status_get_status(packet); 2820 addr_type = hci_stack->outgoing_addr_type; 2821 conn = hci_connection_for_bd_addr_and_type(hci_stack->outgoing_addr, addr_type); 2822 log_info("command status (create connection), status %x, connection %p, addr %s, type %x", status, conn, bd_addr_to_str(hci_stack->outgoing_addr), addr_type); 2823 2824 // reset outgoing address info 2825 memset(hci_stack->outgoing_addr, 0, 6); 2826 hci_stack->outgoing_addr_type = BD_ADDR_TYPE_UNKNOWN; 2827 2828 // on error 2829 if (status != ERROR_CODE_SUCCESS){ 2830 #ifdef ENABLE_LE_CENTRAL 2831 if (hci_is_le_connection_type(addr_type)){ 2832 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 2833 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 2834 } 2835 #endif 2836 // error => outgoing connection failed 2837 if (conn != NULL){ 2838 hci_handle_connection_failed(conn, status); 2839 } 2840 } 2841 } 2842 2843 #ifdef ENABLE_CLASSIC 2844 if (HCI_EVENT_IS_COMMAND_STATUS(packet, hci_inquiry)) { 2845 uint8_t status = hci_event_command_status_get_status(packet); 2846 log_info("command status (inquiry), status %x", status); 2847 if (status == ERROR_CODE_SUCCESS) { 2848 hci_stack->inquiry_state = GAP_INQUIRY_STATE_ACTIVE; 2849 } else { 2850 hci_stack->inquiry_state = GAP_INQUIRY_STATE_IDLE; 2851 } 2852 } 2853 #endif 2854 break; 2855 2856 case HCI_EVENT_NUMBER_OF_COMPLETED_PACKETS:{ 2857 if (size < 3) return; 2858 uint16_t num_handles = packet[2]; 2859 if (size != (3u + num_handles * 4u)) return; 2860 uint16_t offset = 3; 2861 for (i=0; i<num_handles;i++){ 2862 handle = little_endian_read_16(packet, offset) & 0x0fffu; 2863 offset += 2u; 2864 uint16_t num_packets = little_endian_read_16(packet, offset); 2865 offset += 2u; 2866 2867 conn = hci_connection_for_handle(handle); 2868 if (!conn){ 2869 log_error("hci_number_completed_packet lists unused con handle %u", handle); 2870 continue; 2871 } 2872 2873 if (conn->num_packets_sent >= num_packets){ 2874 conn->num_packets_sent -= num_packets; 2875 } else { 2876 log_error("hci_number_completed_packets, more packet slots freed then sent."); 2877 conn->num_packets_sent = 0; 2878 } 2879 // log_info("hci_number_completed_packet %u processed for handle %u, outstanding %u", num_packets, handle, conn->num_packets_sent); 2880 2881 #ifdef ENABLE_CLASSIC 2882 // For SCO, we do the can_send_now_check here 2883 hci_notify_if_sco_can_send_now(); 2884 #endif 2885 } 2886 break; 2887 } 2888 2889 #ifdef ENABLE_CLASSIC 2890 case HCI_EVENT_INQUIRY_COMPLETE: 2891 if (hci_stack->inquiry_state == GAP_INQUIRY_STATE_ACTIVE){ 2892 hci_stack->inquiry_state = GAP_INQUIRY_STATE_IDLE; 2893 uint8_t event[] = { GAP_EVENT_INQUIRY_COMPLETE, 1, 0}; 2894 hci_emit_event(event, sizeof(event), 1); 2895 } 2896 break; 2897 case HCI_EVENT_REMOTE_NAME_REQUEST_COMPLETE: 2898 if (hci_stack->remote_name_state == GAP_REMOTE_NAME_STATE_W4_COMPLETE){ 2899 hci_stack->remote_name_state = GAP_REMOTE_NAME_STATE_IDLE; 2900 } 2901 break; 2902 case HCI_EVENT_CONNECTION_REQUEST: 2903 reverse_bd_addr(&packet[2], addr); 2904 link_type = (hci_link_type_t) packet[11]; 2905 2906 // CVE-2020-26555: reject incoming connection from device with same BD ADDR 2907 if (memcmp(hci_stack->local_bd_addr, addr, 6) == 0){ 2908 hci_stack->decline_reason = ERROR_CODE_CONNECTION_REJECTED_DUE_TO_UNACCEPTABLE_BD_ADDR; 2909 bd_addr_copy(hci_stack->decline_addr, addr); 2910 break; 2911 } 2912 2913 if (hci_stack->gap_classic_accept_callback != NULL){ 2914 if ((*hci_stack->gap_classic_accept_callback)(addr, link_type) == 0){ 2915 hci_stack->decline_reason = ERROR_CODE_CONNECTION_REJECTED_DUE_TO_UNACCEPTABLE_BD_ADDR; 2916 bd_addr_copy(hci_stack->decline_addr, addr); 2917 break; 2918 } 2919 } 2920 2921 // TODO: eval COD 8-10 2922 log_info("Connection_incoming: %s, type %u", bd_addr_to_str(addr), (unsigned int) link_type); 2923 addr_type = (link_type == HCI_LINK_TYPE_ACL) ? BD_ADDR_TYPE_ACL : BD_ADDR_TYPE_SCO; 2924 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 2925 if (!conn) { 2926 conn = create_connection_for_bd_addr_and_type(addr, addr_type); 2927 } 2928 if (!conn) { 2929 // CONNECTION REJECTED DUE TO LIMITED RESOURCES (0X0D) 2930 hci_stack->decline_reason = ERROR_CODE_CONNECTION_REJECTED_DUE_TO_LIMITED_RESOURCES; 2931 bd_addr_copy(hci_stack->decline_addr, addr); 2932 hci_run(); 2933 // avoid event to higher layer 2934 return; 2935 } 2936 conn->role = HCI_ROLE_SLAVE; 2937 conn->state = RECEIVED_CONNECTION_REQUEST; 2938 // store info about eSCO 2939 if (link_type == HCI_LINK_TYPE_ESCO){ 2940 conn->remote_supported_features[0] |= 1; 2941 } 2942 hci_run(); 2943 break; 2944 2945 case HCI_EVENT_CONNECTION_COMPLETE: 2946 // Connection management 2947 reverse_bd_addr(&packet[5], addr); 2948 log_info("Connection_complete (status=%u) %s", packet[2], bd_addr_to_str(addr)); 2949 addr_type = BD_ADDR_TYPE_ACL; 2950 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 2951 if (conn) { 2952 if (!packet[2]){ 2953 conn->state = OPEN; 2954 conn->con_handle = little_endian_read_16(packet, 3); 2955 2956 // queue set supervision timeout if we're master 2957 if ((hci_stack->link_supervision_timeout != HCI_LINK_SUPERVISION_TIMEOUT_DEFAULT) && (conn->role == HCI_ROLE_MASTER)){ 2958 connectionSetAuthenticationFlags(conn, AUTH_FLAG_WRITE_SUPERVISION_TIMEOUT); 2959 } 2960 2961 // restart timer 2962 btstack_run_loop_set_timer(&conn->timeout, HCI_CONNECTION_TIMEOUT_MS); 2963 btstack_run_loop_add_timer(&conn->timeout); 2964 2965 // trigger remote features for dedicated bonding 2966 if ((conn->bonding_flags & BONDING_DEDICATED) != 0){ 2967 hci_trigger_remote_features_for_connection(conn); 2968 } 2969 2970 log_info("New connection: handle %u, %s", conn->con_handle, bd_addr_to_str(conn->address)); 2971 2972 hci_emit_nr_connections_changed(); 2973 } else { 2974 // connection failed 2975 hci_handle_connection_failed(conn, packet[2]); 2976 } 2977 } 2978 break; 2979 2980 case HCI_EVENT_SYNCHRONOUS_CONNECTION_COMPLETE: 2981 reverse_bd_addr(&packet[5], addr); 2982 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_SCO); 2983 log_info("Synchronous Connection Complete for %p (status=%u) %s", conn, packet[2], bd_addr_to_str(addr)); 2984 if (packet[2]){ 2985 // connection failed 2986 if (conn){ 2987 hci_handle_connection_failed(conn, packet[2]); 2988 } 2989 break; 2990 } 2991 if (!conn) { 2992 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_SCO); 2993 } 2994 if (!conn) { 2995 break; 2996 } 2997 conn->state = OPEN; 2998 conn->con_handle = little_endian_read_16(packet, 3); 2999 3000 #ifdef ENABLE_SCO_OVER_HCI 3001 // update SCO 3002 if (conn->address_type == BD_ADDR_TYPE_SCO && hci_stack->hci_transport && hci_stack->hci_transport->set_sco_config){ 3003 hci_stack->hci_transport->set_sco_config(hci_stack->sco_voice_setting_active, hci_number_sco_connections()); 3004 } 3005 // trigger can send now 3006 if (hci_have_usb_transport()){ 3007 hci_stack->sco_can_send_now = true; 3008 } 3009 #endif 3010 #ifdef HAVE_SCO_TRANSPORT 3011 // configure sco transport 3012 if (hci_stack->sco_transport != NULL){ 3013 sco_format_t sco_format = ((hci_stack->sco_voice_setting_active & 0x03) == 0x03) ? SCO_FORMAT_8_BIT : SCO_FORMAT_16_BIT; 3014 hci_stack->sco_transport->open(conn->con_handle, sco_format); 3015 } 3016 #endif 3017 break; 3018 3019 case HCI_EVENT_READ_REMOTE_SUPPORTED_FEATURES_COMPLETE: 3020 handle = little_endian_read_16(packet, 3); 3021 conn = hci_connection_for_handle(handle); 3022 if (!conn) break; 3023 if (!packet[2]){ 3024 const uint8_t * features = &packet[5]; 3025 hci_handle_remote_features_page_0(conn, features); 3026 3027 // read extended features if possible 3028 if (hci_command_supported(SUPPORTED_HCI_COMMAND_READ_REMOTE_EXTENDED_FEATURES) 3029 && ((conn->remote_supported_features[0] & 2) != 0)) { 3030 conn->bonding_flags |= BONDING_REQUEST_REMOTE_FEATURES_PAGE_1; 3031 break; 3032 } 3033 } 3034 hci_handle_remote_features_received(conn); 3035 break; 3036 3037 case HCI_EVENT_READ_REMOTE_EXTENDED_FEATURES_COMPLETE: 3038 handle = little_endian_read_16(packet, 3); 3039 conn = hci_connection_for_handle(handle); 3040 if (!conn) break; 3041 // status = ok, page = 1 3042 if (!packet[2]) { 3043 uint8_t page_number = packet[5]; 3044 uint8_t maximum_page_number = packet[6]; 3045 const uint8_t * features = &packet[7]; 3046 bool done = false; 3047 switch (page_number){ 3048 case 1: 3049 hci_handle_remote_features_page_1(conn, features); 3050 if (maximum_page_number >= 2){ 3051 // get Secure Connections (Controller) from Page 2 if available 3052 conn->bonding_flags |= BONDING_REQUEST_REMOTE_FEATURES_PAGE_2; 3053 } else { 3054 // otherwise, assume SC (Controller) == SC (Host) 3055 if ((conn->bonding_flags & BONDING_REMOTE_SUPPORTS_SC_HOST) != 0){ 3056 conn->bonding_flags |= BONDING_REMOTE_SUPPORTS_SC_CONTROLLER; 3057 } 3058 done = true; 3059 } 3060 break; 3061 case 2: 3062 hci_handle_remote_features_page_2(conn, features); 3063 done = true; 3064 break; 3065 default: 3066 break; 3067 } 3068 if (!done) break; 3069 } 3070 hci_handle_remote_features_received(conn); 3071 break; 3072 3073 case HCI_EVENT_LINK_KEY_REQUEST: 3074 #ifndef ENABLE_EXPLICIT_LINK_KEY_REPLY 3075 hci_event_link_key_request_get_bd_addr(packet, addr); 3076 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 3077 if (!conn) break; 3078 3079 // lookup link key in db if not cached 3080 if ((conn->link_key_type == INVALID_LINK_KEY) && (hci_stack->link_key_db != NULL)){ 3081 hci_stack->link_key_db->get_link_key(conn->address, conn->link_key, &conn->link_key_type); 3082 } 3083 3084 // response sent by hci_run() 3085 conn->authentication_flags |= AUTH_FLAG_HANDLE_LINK_KEY_REQUEST; 3086 #endif 3087 break; 3088 3089 case HCI_EVENT_LINK_KEY_NOTIFICATION: { 3090 hci_event_link_key_request_get_bd_addr(packet, addr); 3091 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 3092 if (!conn) break; 3093 3094 hci_pairing_complete(conn, ERROR_CODE_SUCCESS); 3095 3096 // CVE-2020-26555: ignore NULL link key 3097 // default link_key_type = INVALID_LINK_KEY asserts that NULL key won't be used for encryption 3098 if (btstack_is_null(&packet[8], 16)) break; 3099 3100 link_key_type_t link_key_type = (link_key_type_t)packet[24]; 3101 // Change Connection Encryption keeps link key type 3102 if (link_key_type != CHANGED_COMBINATION_KEY){ 3103 conn->link_key_type = link_key_type; 3104 } 3105 3106 // cache link key. link keys stored in little-endian format for legacy reasons 3107 memcpy(&conn->link_key, &packet[8], 16); 3108 3109 // only store link key: 3110 // - if bondable enabled 3111 if (hci_stack->bondable == false) break; 3112 // - if security level sufficient 3113 if (gap_security_level_for_link_key_type(link_key_type) < conn->requested_security_level) break; 3114 // - for SSP, also check if remote side requested bonding as well 3115 if (conn->link_key_type != COMBINATION_KEY){ 3116 bool remote_bonding = conn->io_cap_response_auth_req >= SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_DEDICATED_BONDING; 3117 if (!remote_bonding){ 3118 break; 3119 } 3120 } 3121 gap_store_link_key_for_bd_addr(addr, &packet[8], conn->link_key_type); 3122 break; 3123 } 3124 3125 case HCI_EVENT_PIN_CODE_REQUEST: 3126 hci_event_pin_code_request_get_bd_addr(packet, addr); 3127 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 3128 if (!conn) break; 3129 3130 hci_pairing_started(conn, false); 3131 // abort pairing if: non-bondable mode (pin code request is not forwarded to app) 3132 if (!hci_stack->bondable ){ 3133 conn->authentication_flags |= AUTH_FLAG_DENY_PIN_CODE_REQUEST; 3134 hci_pairing_complete(conn, ERROR_CODE_PAIRING_NOT_ALLOWED); 3135 hci_run(); 3136 return; 3137 } 3138 // abort pairing if: LEVEL_4 required (pin code request is not forwarded to app) 3139 if ((hci_stack->gap_secure_connections_only_mode) || (conn->requested_security_level == LEVEL_4)){ 3140 log_info("Level 4 required, but SC not supported -> abort"); 3141 conn->authentication_flags |= AUTH_FLAG_DENY_PIN_CODE_REQUEST; 3142 hci_pairing_complete(conn, ERROR_CODE_INSUFFICIENT_SECURITY); 3143 hci_run(); 3144 return; 3145 } 3146 break; 3147 3148 case HCI_EVENT_IO_CAPABILITY_RESPONSE: 3149 hci_event_io_capability_response_get_bd_addr(packet, addr); 3150 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 3151 if (!conn) break; 3152 3153 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], AUTH_FLAG_RECV_IO_CAPABILITIES_RESPONSE); 3154 hci_pairing_started(conn, true); 3155 conn->io_cap_response_auth_req = hci_event_io_capability_response_get_authentication_requirements(packet); 3156 conn->io_cap_response_io = hci_event_io_capability_response_get_io_capability(packet); 3157 #ifdef ENABLE_CLASSIC_PAIRING_OOB 3158 conn->io_cap_response_oob_data = hci_event_io_capability_response_get_oob_data_present(packet); 3159 #endif 3160 break; 3161 3162 case HCI_EVENT_IO_CAPABILITY_REQUEST: 3163 hci_event_io_capability_response_get_bd_addr(packet, addr); 3164 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 3165 if (!conn) break; 3166 3167 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], AUTH_FLAG_RECV_IO_CAPABILITIES_REQUEST); 3168 hci_connection_timestamp(conn); 3169 hci_pairing_started(conn, true); 3170 break; 3171 3172 #ifdef ENABLE_CLASSIC_PAIRING_OOB 3173 case HCI_EVENT_REMOTE_OOB_DATA_REQUEST: 3174 hci_event_remote_oob_data_request_get_bd_addr(packet, addr); 3175 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 3176 if (!conn) break; 3177 3178 hci_connection_timestamp(conn); 3179 3180 hci_pairing_started(conn, true); 3181 3182 connectionSetAuthenticationFlags(conn, AUTH_FLAG_SEND_REMOTE_OOB_DATA_REPLY); 3183 break; 3184 #endif 3185 3186 case HCI_EVENT_USER_CONFIRMATION_REQUEST: 3187 hci_event_user_confirmation_request_get_bd_addr(packet, addr); 3188 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 3189 if (!conn) break; 3190 if (hci_ssp_security_level_possible_for_io_cap(conn->requested_security_level, hci_stack->ssp_io_capability, conn->io_cap_response_io)) { 3191 if (hci_stack->ssp_auto_accept){ 3192 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], AUTH_FLAG_SEND_USER_CONFIRM_REPLY); 3193 }; 3194 } else { 3195 hci_pairing_complete(conn, ERROR_CODE_INSUFFICIENT_SECURITY); 3196 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], AUTH_FLAG_SEND_USER_CONFIRM_NEGATIVE_REPLY); 3197 // don't forward event to app 3198 hci_run(); 3199 return; 3200 } 3201 break; 3202 3203 case HCI_EVENT_USER_PASSKEY_REQUEST: 3204 // Pairing using Passkey results in MITM protection. If Level 4 is required, support for SC is validated on IO Cap Request 3205 if (hci_stack->ssp_auto_accept){ 3206 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], AUTH_FLAG_SEND_USER_PASSKEY_REPLY); 3207 }; 3208 break; 3209 3210 case HCI_EVENT_MODE_CHANGE: 3211 handle = hci_event_mode_change_get_handle(packet); 3212 conn = hci_connection_for_handle(handle); 3213 if (!conn) break; 3214 conn->connection_mode = hci_event_mode_change_get_mode(packet); 3215 log_info("HCI_EVENT_MODE_CHANGE, handle 0x%04x, mode %u", handle, conn->connection_mode); 3216 break; 3217 #endif 3218 3219 case HCI_EVENT_ENCRYPTION_CHANGE: 3220 handle = hci_event_encryption_change_get_connection_handle(packet); 3221 conn = hci_connection_for_handle(handle); 3222 if (!conn) break; 3223 if (hci_event_encryption_change_get_status(packet) == 0u) { 3224 uint8_t encryption_enabled = hci_event_encryption_change_get_encryption_enabled(packet); 3225 if (encryption_enabled){ 3226 if (hci_is_le_connection(conn)){ 3227 // For LE, we accept connection as encrypted 3228 conn->authentication_flags |= AUTH_FLAG_CONNECTION_ENCRYPTED; 3229 } 3230 #ifdef ENABLE_CLASSIC 3231 else { 3232 3233 // dedicated bonding: send result and disconnect 3234 if (conn->bonding_flags & BONDING_DEDICATED){ 3235 conn->bonding_flags &= ~BONDING_DEDICATED; 3236 conn->bonding_flags |= BONDING_DISCONNECT_DEDICATED_DONE; 3237 conn->bonding_status = packet[2]; 3238 break; 3239 } 3240 3241 // Detect Secure Connection -> Legacy Connection Downgrade Attack (BIAS) 3242 bool sc_used_during_pairing = gap_secure_connection_for_link_key_type(conn->link_key_type); 3243 bool connected_uses_aes_ccm = encryption_enabled == 2; 3244 if (hci_stack->secure_connections_active && sc_used_during_pairing && !connected_uses_aes_ccm){ 3245 log_info("SC during pairing, but only E0 now -> abort"); 3246 conn->bonding_flags |= BONDING_DISCONNECT_SECURITY_BLOCK; 3247 break; 3248 } 3249 3250 // if AES-CCM is used, authentication used SC -> authentication was mutual and we can skip explicit authentication 3251 if (connected_uses_aes_ccm){ 3252 conn->authentication_flags |= AUTH_FLAG_CONNECTION_AUTHENTICATED; 3253 } 3254 3255 #ifdef ENABLE_TESTING_SUPPORT 3256 // work around for issue with PTS dongle 3257 conn->authentication_flags |= AUTH_FLAG_CONNECTION_AUTHENTICATED; 3258 #endif 3259 if (hci_command_supported(SUPPORTED_HCI_COMMAND_READ_ENCRYPTION_KEY_SIZE)){ 3260 // For Classic, we need to validate encryption key size first, if possible (== supported by Controller) 3261 conn->bonding_flags |= BONDING_SEND_READ_ENCRYPTION_KEY_SIZE; 3262 } else { 3263 // if not, pretend everything is perfect 3264 hci_handle_read_encryption_key_size_complete(conn, 16); 3265 } 3266 } 3267 #endif 3268 } else { 3269 conn->authentication_flags &= ~AUTH_FLAG_CONNECTION_ENCRYPTED; 3270 } 3271 } 3272 3273 break; 3274 3275 #ifdef ENABLE_CLASSIC 3276 case HCI_EVENT_AUTHENTICATION_COMPLETE_EVENT: 3277 handle = hci_event_authentication_complete_get_connection_handle(packet); 3278 conn = hci_connection_for_handle(handle); 3279 if (!conn) break; 3280 3281 // clear authentication active flag 3282 conn->bonding_flags &= ~BONDING_SENT_AUTHENTICATE_REQUEST; 3283 hci_pairing_complete(conn, hci_event_authentication_complete_get_status(packet)); 3284 3285 // authenticated only if auth status == 0 3286 if (hci_event_authentication_complete_get_status(packet) == 0){ 3287 // authenticated 3288 conn->authentication_flags |= AUTH_FLAG_CONNECTION_AUTHENTICATED; 3289 3290 // If not already encrypted, start encryption 3291 if ((conn->authentication_flags & AUTH_FLAG_CONNECTION_ENCRYPTED) == 0){ 3292 conn->bonding_flags |= BONDING_SEND_ENCRYPTION_REQUEST; 3293 break; 3294 } 3295 } 3296 3297 // emit updated security level 3298 hci_emit_security_level(handle, gap_security_level_for_connection(conn)); 3299 break; 3300 3301 case HCI_EVENT_SIMPLE_PAIRING_COMPLETE: 3302 hci_event_simple_pairing_complete_get_bd_addr(packet, addr); 3303 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 3304 if (!conn) break; 3305 3306 // treat successfully paired connection as authenticated 3307 if (hci_event_simple_pairing_complete_get_status(packet) == ERROR_CODE_SUCCESS){ 3308 conn->authentication_flags |= AUTH_FLAG_CONNECTION_AUTHENTICATED; 3309 } 3310 3311 hci_pairing_complete(conn, hci_event_simple_pairing_complete_get_status(packet)); 3312 break; 3313 #endif 3314 3315 // HCI_EVENT_DISCONNECTION_COMPLETE 3316 // has been split, to first notify stack before shutting connection down 3317 // see end of function, too. 3318 case HCI_EVENT_DISCONNECTION_COMPLETE: 3319 if (packet[2]) break; // status != 0 3320 handle = little_endian_read_16(packet, 3); 3321 // drop outgoing ACL fragments if it is for closed connection and release buffer if tx not active 3322 if (hci_stack->acl_fragmentation_total_size > 0u) { 3323 if (handle == READ_ACL_CONNECTION_HANDLE(hci_stack->hci_packet_buffer)){ 3324 int release_buffer = hci_stack->acl_fragmentation_tx_active == 0u; 3325 log_info("drop fragmented ACL data for closed connection, release buffer %u", release_buffer); 3326 hci_stack->acl_fragmentation_total_size = 0; 3327 hci_stack->acl_fragmentation_pos = 0; 3328 if (release_buffer){ 3329 hci_release_packet_buffer(); 3330 } 3331 } 3332 } 3333 3334 conn = hci_connection_for_handle(handle); 3335 if (!conn) break; 3336 #ifdef ENABLE_CLASSIC 3337 // pairing failed if it was ongoing 3338 hci_pairing_complete(conn, ERROR_CODE_REMOTE_USER_TERMINATED_CONNECTION); 3339 #endif 3340 3341 // emit dedicatd bonding event 3342 if (conn->bonding_flags & BONDING_EMIT_COMPLETE_ON_DISCONNECT){ 3343 hci_emit_dedicated_bonding_result(conn->address, conn->bonding_status); 3344 } 3345 3346 // mark connection for shutdown, stop timers, reset state 3347 conn->state = RECEIVED_DISCONNECTION_COMPLETE; 3348 hci_connection_stop_timer(conn); 3349 hci_connection_init(conn); 3350 3351 #ifdef ENABLE_BLE 3352 #ifdef ENABLE_LE_PERIPHERAL 3353 // re-enable advertisements for le connections if active 3354 if (hci_is_le_connection(conn)){ 3355 hci_update_advertisements_enabled_for_current_roles(); 3356 } 3357 #endif 3358 #endif 3359 break; 3360 3361 case HCI_EVENT_HARDWARE_ERROR: 3362 log_error("Hardware Error: 0x%02x", packet[2]); 3363 if (hci_stack->hardware_error_callback){ 3364 (*hci_stack->hardware_error_callback)(packet[2]); 3365 } else { 3366 // if no special requests, just reboot stack 3367 hci_power_control_off(); 3368 hci_power_control_on(); 3369 } 3370 break; 3371 3372 #ifdef ENABLE_CLASSIC 3373 case HCI_EVENT_ROLE_CHANGE: 3374 if (packet[2]) break; // status != 0 3375 reverse_bd_addr(&packet[3], addr); 3376 addr_type = BD_ADDR_TYPE_ACL; 3377 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 3378 if (!conn) break; 3379 conn->role = packet[9]; 3380 break; 3381 #endif 3382 3383 case HCI_EVENT_TRANSPORT_PACKET_SENT: 3384 // release packet buffer only for asynchronous transport and if there are not further fragements 3385 if (hci_transport_synchronous()) { 3386 log_error("Synchronous HCI Transport shouldn't send HCI_EVENT_TRANSPORT_PACKET_SENT"); 3387 return; // instead of break: to avoid re-entering hci_run() 3388 } 3389 hci_stack->acl_fragmentation_tx_active = 0; 3390 if (hci_stack->acl_fragmentation_total_size) break; 3391 hci_release_packet_buffer(); 3392 3393 // L2CAP receives this event via the hci_emit_event below 3394 3395 #ifdef ENABLE_CLASSIC 3396 // For SCO, we do the can_send_now_check here 3397 hci_notify_if_sco_can_send_now(); 3398 #endif 3399 break; 3400 3401 #ifdef ENABLE_CLASSIC 3402 case HCI_EVENT_SCO_CAN_SEND_NOW: 3403 // For SCO, we do the can_send_now_check here 3404 hci_stack->sco_can_send_now = true; 3405 hci_notify_if_sco_can_send_now(); 3406 return; 3407 3408 // explode inquriy results for easier consumption 3409 case HCI_EVENT_INQUIRY_RESULT: 3410 case HCI_EVENT_INQUIRY_RESULT_WITH_RSSI: 3411 case HCI_EVENT_EXTENDED_INQUIRY_RESPONSE: 3412 gap_inquiry_explode(packet, size); 3413 break; 3414 #endif 3415 3416 #ifdef ENABLE_BLE 3417 case HCI_EVENT_LE_META: 3418 switch (packet[2]){ 3419 #ifdef ENABLE_LE_CENTRAL 3420 case HCI_SUBEVENT_LE_ADVERTISING_REPORT: 3421 if (!hci_stack->le_scanning_enabled) break; 3422 le_handle_advertisement_report(packet, size); 3423 break; 3424 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 3425 case HCI_SUBEVENT_LE_EXTENDED_ADVERTISING_REPORT: 3426 if (!hci_stack->le_scanning_enabled) break; 3427 le_handle_extended_advertisement_report(packet, size); 3428 break; 3429 #endif 3430 #endif 3431 case HCI_SUBEVENT_LE_CONNECTION_COMPLETE: 3432 event_handle_le_connection_complete(packet); 3433 break; 3434 3435 // log_info("LE buffer size: %u, count %u", little_endian_read_16(packet,6), packet[8]); 3436 case HCI_SUBEVENT_LE_CONNECTION_UPDATE_COMPLETE: 3437 handle = hci_subevent_le_connection_update_complete_get_connection_handle(packet); 3438 conn = hci_connection_for_handle(handle); 3439 if (!conn) break; 3440 conn->le_connection_interval = hci_subevent_le_connection_update_complete_get_conn_interval(packet); 3441 break; 3442 3443 case HCI_SUBEVENT_LE_REMOTE_CONNECTION_PARAMETER_REQUEST: 3444 // connection 3445 handle = hci_subevent_le_remote_connection_parameter_request_get_connection_handle(packet); 3446 conn = hci_connection_for_handle(handle); 3447 if (conn) { 3448 // read arguments 3449 uint16_t le_conn_interval_min = hci_subevent_le_remote_connection_parameter_request_get_interval_min(packet); 3450 uint16_t le_conn_interval_max = hci_subevent_le_remote_connection_parameter_request_get_interval_max(packet); 3451 uint16_t le_conn_latency = hci_subevent_le_remote_connection_parameter_request_get_latency(packet); 3452 uint16_t le_supervision_timeout = hci_subevent_le_remote_connection_parameter_request_get_timeout(packet); 3453 3454 // validate against current connection parameter range 3455 le_connection_parameter_range_t existing_range; 3456 gap_get_connection_parameter_range(&existing_range); 3457 int update_parameter = gap_connection_parameter_range_included(&existing_range, le_conn_interval_min, le_conn_interval_max, le_conn_latency, le_supervision_timeout); 3458 if (update_parameter){ 3459 conn->le_con_parameter_update_state = CON_PARAMETER_UPDATE_REPLY; 3460 conn->le_conn_interval_min = le_conn_interval_min; 3461 conn->le_conn_interval_max = le_conn_interval_max; 3462 conn->le_conn_latency = le_conn_latency; 3463 conn->le_supervision_timeout = le_supervision_timeout; 3464 } else { 3465 conn->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NEGATIVE_REPLY; 3466 } 3467 } 3468 break; 3469 #ifdef ENABLE_LE_LIMIT_ACL_FRAGMENT_BY_MAX_OCTETS 3470 case HCI_SUBEVENT_LE_DATA_LENGTH_CHANGE: 3471 handle = hci_subevent_le_data_length_change_get_connection_handle(packet); 3472 conn = hci_connection_for_handle(handle); 3473 if (conn) { 3474 conn->le_max_tx_octets = hci_subevent_le_data_length_change_get_max_tx_octets(packet); 3475 } 3476 break; 3477 #endif 3478 default: 3479 break; 3480 } 3481 break; 3482 #endif 3483 case HCI_EVENT_VENDOR_SPECIFIC: 3484 // Vendor specific commands often create vendor specific event instead of num completed packets 3485 // To avoid getting stuck as num_cmds_packets is zero, reset it to 1 for controllers with this behaviour 3486 switch (hci_stack->manufacturer){ 3487 case BLUETOOTH_COMPANY_ID_CAMBRIDGE_SILICON_RADIO: 3488 hci_stack->num_cmd_packets = 1; 3489 break; 3490 default: 3491 break; 3492 } 3493 break; 3494 default: 3495 break; 3496 } 3497 3498 handle_event_for_current_stack_state(packet, size); 3499 3500 // notify upper stack 3501 hci_emit_event(packet, size, 0); // don't dump, already happened in packet handler 3502 3503 // moved here to give upper stack a chance to close down everything with hci_connection_t intact 3504 if ((hci_event_packet_get_type(packet) == HCI_EVENT_DISCONNECTION_COMPLETE) && (packet[2] == 0)){ 3505 handle = little_endian_read_16(packet, 3); 3506 hci_connection_t * aConn = hci_connection_for_handle(handle); 3507 // discard connection if app did not trigger a reconnect in the event handler 3508 if (aConn && aConn->state == RECEIVED_DISCONNECTION_COMPLETE){ 3509 hci_shutdown_connection(aConn); 3510 } 3511 } 3512 3513 // execute main loop 3514 hci_run(); 3515 } 3516 3517 #ifdef ENABLE_CLASSIC 3518 3519 #ifdef ENABLE_SCO_OVER_HCI 3520 static void sco_tx_timeout_handler(btstack_timer_source_t * ts); 3521 static void sco_schedule_tx(hci_connection_t * conn); 3522 3523 static void sco_tx_timeout_handler(btstack_timer_source_t * ts){ 3524 log_debug("SCO TX Timeout"); 3525 hci_con_handle_t con_handle = (hci_con_handle_t) (uintptr_t) btstack_run_loop_get_timer_context(ts); 3526 hci_connection_t * conn = hci_connection_for_handle(con_handle); 3527 if (!conn) return; 3528 3529 // trigger send 3530 conn->sco_tx_ready = 1; 3531 // extra packet if CVSD but SCO buffer is too short 3532 if (((hci_stack->sco_voice_setting_active & 0x03) != 0x03) && (hci_stack->sco_data_packet_length < 123)){ 3533 conn->sco_tx_ready++; 3534 } 3535 hci_notify_if_sco_can_send_now(); 3536 } 3537 3538 3539 #define SCO_TX_AFTER_RX_MS (6) 3540 3541 static void sco_schedule_tx(hci_connection_t * conn){ 3542 3543 uint32_t now = btstack_run_loop_get_time_ms(); 3544 uint32_t sco_tx_ms = conn->sco_rx_ms + SCO_TX_AFTER_RX_MS; 3545 int time_delta_ms = sco_tx_ms - now; 3546 3547 btstack_timer_source_t * timer = (conn->sco_rx_count & 1) ? &conn->timeout : &conn->timeout_sco; 3548 3549 // log_error("SCO TX at %u in %u", (int) sco_tx_ms, time_delta_ms); 3550 btstack_run_loop_remove_timer(timer); 3551 btstack_run_loop_set_timer(timer, time_delta_ms); 3552 btstack_run_loop_set_timer_context(timer, (void *) (uintptr_t) conn->con_handle); 3553 btstack_run_loop_set_timer_handler(timer, &sco_tx_timeout_handler); 3554 btstack_run_loop_add_timer(timer); 3555 } 3556 #endif 3557 3558 static void sco_handler(uint8_t * packet, uint16_t size){ 3559 // lookup connection struct 3560 hci_con_handle_t con_handle = READ_SCO_CONNECTION_HANDLE(packet); 3561 hci_connection_t * conn = hci_connection_for_handle(con_handle); 3562 if (!conn) return; 3563 3564 #ifdef ENABLE_SCO_OVER_HCI 3565 // CSR 8811 prefixes 60 byte SCO packet in transparent mode with 20 zero bytes -> skip first 20 payload bytes 3566 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_CAMBRIDGE_SILICON_RADIO){ 3567 if ((size == 83) && ((hci_stack->sco_voice_setting_active & 0x03) == 0x03)){ 3568 packet[2] = 0x3c; 3569 memmove(&packet[3], &packet[23], 63); 3570 size = 63; 3571 } 3572 } 3573 3574 if (hci_have_usb_transport()){ 3575 // Nothing to do 3576 } else { 3577 // log_debug("sco flow %u, handle 0x%04x, packets sent %u, bytes send %u", hci_stack->synchronous_flow_control_enabled, (int) con_handle, conn->num_packets_sent, conn->num_sco_bytes_sent); 3578 if (hci_stack->synchronous_flow_control_enabled == 0){ 3579 uint32_t now = btstack_run_loop_get_time_ms(); 3580 3581 if (!conn->sco_rx_valid){ 3582 // ignore first 10 packets 3583 conn->sco_rx_count++; 3584 // log_debug("sco rx count %u", conn->sco_rx_count); 3585 if (conn->sco_rx_count == 10) { 3586 // use first timestamp as is and pretent it just started 3587 conn->sco_rx_ms = now; 3588 conn->sco_rx_valid = 1; 3589 conn->sco_rx_count = 0; 3590 sco_schedule_tx(conn); 3591 } 3592 } else { 3593 // track expected arrival timme 3594 conn->sco_rx_count++; 3595 conn->sco_rx_ms += 7; 3596 int delta = (int32_t) (now - conn->sco_rx_ms); 3597 if (delta > 0){ 3598 conn->sco_rx_ms++; 3599 } 3600 // log_debug("sco rx %u", conn->sco_rx_ms); 3601 sco_schedule_tx(conn); 3602 } 3603 } 3604 } 3605 #endif 3606 3607 // deliver to app 3608 if (hci_stack->sco_packet_handler) { 3609 hci_stack->sco_packet_handler(HCI_SCO_DATA_PACKET, 0, packet, size); 3610 } 3611 3612 #ifdef HAVE_SCO_TRANSPORT 3613 // We can send one packet for each received packet 3614 conn->sco_tx_ready++; 3615 hci_notify_if_sco_can_send_now(); 3616 #endif 3617 3618 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 3619 conn->num_packets_completed++; 3620 hci_stack->host_completed_packets = 1; 3621 hci_run(); 3622 #endif 3623 } 3624 #endif 3625 3626 static void packet_handler(uint8_t packet_type, uint8_t *packet, uint16_t size){ 3627 hci_dump_packet(packet_type, 1, packet, size); 3628 switch (packet_type) { 3629 case HCI_EVENT_PACKET: 3630 event_handler(packet, size); 3631 break; 3632 case HCI_ACL_DATA_PACKET: 3633 acl_handler(packet, size); 3634 break; 3635 #ifdef ENABLE_CLASSIC 3636 case HCI_SCO_DATA_PACKET: 3637 sco_handler(packet, size); 3638 break; 3639 #endif 3640 default: 3641 break; 3642 } 3643 } 3644 3645 /** 3646 * @brief Add event packet handler. 3647 */ 3648 void hci_add_event_handler(btstack_packet_callback_registration_t * callback_handler){ 3649 btstack_linked_list_add_tail(&hci_stack->event_handlers, (btstack_linked_item_t*) callback_handler); 3650 } 3651 3652 /** 3653 * @brief Remove event packet handler. 3654 */ 3655 void hci_remove_event_handler(btstack_packet_callback_registration_t * callback_handler){ 3656 btstack_linked_list_remove(&hci_stack->event_handlers, (btstack_linked_item_t*) callback_handler); 3657 } 3658 3659 /** Register HCI packet handlers */ 3660 void hci_register_acl_packet_handler(btstack_packet_handler_t handler){ 3661 hci_stack->acl_packet_handler = handler; 3662 } 3663 3664 #ifdef ENABLE_CLASSIC 3665 /** 3666 * @brief Registers a packet handler for SCO data. Used for HSP and HFP profiles. 3667 */ 3668 void hci_register_sco_packet_handler(btstack_packet_handler_t handler){ 3669 hci_stack->sco_packet_handler = handler; 3670 } 3671 #endif 3672 3673 static void hci_state_reset(void){ 3674 // no connections yet 3675 hci_stack->connections = NULL; 3676 3677 // keep discoverable/connectable as this has been requested by the client(s) 3678 // hci_stack->discoverable = 0; 3679 // hci_stack->connectable = 0; 3680 // hci_stack->bondable = 1; 3681 // hci_stack->own_addr_type = 0; 3682 3683 // buffer is free 3684 hci_stack->hci_packet_buffer_reserved = false; 3685 3686 // no pending cmds 3687 hci_stack->decline_reason = 0; 3688 3689 hci_stack->secure_connections_active = false; 3690 3691 #ifdef ENABLE_CLASSIC 3692 hci_stack->inquiry_lap = GAP_IAC_GENERAL_INQUIRY; 3693 hci_stack->page_timeout = 0x6000; // ca. 15 sec 3694 3695 hci_stack->gap_tasks_classic = 3696 GAP_TASK_SET_DEFAULT_LINK_POLICY | 3697 GAP_TASK_SET_CLASS_OF_DEVICE | 3698 GAP_TASK_SET_LOCAL_NAME | 3699 GAP_TASK_SET_EIR_DATA | 3700 GAP_TASK_WRITE_SCAN_ENABLE | 3701 GAP_TASK_WRITE_PAGE_TIMEOUT; 3702 #endif 3703 3704 #ifdef ENABLE_CLASSIC_PAIRING_OOB 3705 hci_stack->classic_read_local_oob_data = false; 3706 hci_stack->classic_oob_con_handle = HCI_CON_HANDLE_INVALID; 3707 #endif 3708 3709 // LE 3710 #ifdef ENABLE_BLE 3711 memset(hci_stack->le_random_address, 0, 6); 3712 hci_stack->le_random_address_set = 0; 3713 #endif 3714 #ifdef ENABLE_LE_CENTRAL 3715 hci_stack->le_scanning_active = false; 3716 hci_stack->le_scanning_param_update = true; 3717 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 3718 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 3719 hci_stack->le_whitelist_capacity = 0; 3720 #endif 3721 #ifdef ENABLE_LE_PERIPHERAL 3722 hci_stack->le_advertisements_state &= ~LE_ADVERTISEMENT_STATE_ACTIVE; 3723 if ((hci_stack->le_advertisements_state & LE_ADVERTISEMENT_STATE_PARAMS_SET) != 0){ 3724 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_PARAMS; 3725 } 3726 if (hci_stack->le_advertisements_data != NULL){ 3727 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_ADV_DATA; 3728 } 3729 #endif 3730 } 3731 3732 #ifdef ENABLE_CLASSIC 3733 /** 3734 * @brief Configure Bluetooth hardware control. Has to be called before power on. 3735 */ 3736 void hci_set_link_key_db(btstack_link_key_db_t const * link_key_db){ 3737 // store and open remote device db 3738 hci_stack->link_key_db = link_key_db; 3739 if (hci_stack->link_key_db) { 3740 hci_stack->link_key_db->open(); 3741 } 3742 } 3743 #endif 3744 3745 void hci_init(const hci_transport_t *transport, const void *config){ 3746 3747 #ifdef HAVE_MALLOC 3748 if (!hci_stack) { 3749 hci_stack = (hci_stack_t*) malloc(sizeof(hci_stack_t)); 3750 } 3751 #else 3752 hci_stack = &hci_stack_static; 3753 #endif 3754 memset(hci_stack, 0, sizeof(hci_stack_t)); 3755 3756 // reference to use transport layer implementation 3757 hci_stack->hci_transport = transport; 3758 3759 // reference to used config 3760 hci_stack->config = config; 3761 3762 // setup pointer for outgoing packet buffer 3763 hci_stack->hci_packet_buffer = &hci_stack->hci_packet_buffer_data[HCI_OUTGOING_PRE_BUFFER_SIZE]; 3764 3765 // max acl payload size defined in config.h 3766 hci_stack->acl_data_packet_length = HCI_ACL_PAYLOAD_SIZE; 3767 3768 // register packet handlers with transport 3769 transport->register_packet_handler(&packet_handler); 3770 3771 hci_stack->state = HCI_STATE_OFF; 3772 3773 // class of device 3774 hci_stack->class_of_device = 0x007a020c; // Smartphone 3775 3776 // bondable by default 3777 hci_stack->bondable = 1; 3778 3779 #ifdef ENABLE_CLASSIC 3780 // classic name 3781 hci_stack->local_name = default_classic_name; 3782 3783 // Master slave policy 3784 hci_stack->master_slave_policy = 1; 3785 3786 // Allow Role Switch 3787 hci_stack->allow_role_switch = 1; 3788 3789 // Default / minimum security level = 2 3790 hci_stack->gap_security_level = LEVEL_2; 3791 3792 // Default Security Mode 4 3793 hci_stack->gap_security_mode = GAP_SECURITY_MODE_4; 3794 3795 // Errata-11838 mandates 7 bytes for GAP Security Level 1-3 3796 hci_stack->gap_required_encyrption_key_size = 7; 3797 3798 // Link Supervision Timeout 3799 hci_stack->link_supervision_timeout = HCI_LINK_SUPERVISION_TIMEOUT_DEFAULT; 3800 3801 #endif 3802 3803 // Secure Simple Pairing default: enable, no I/O capabilities, general bonding, mitm not required, auto accept 3804 hci_stack->ssp_enable = 1; 3805 hci_stack->ssp_io_capability = SSP_IO_CAPABILITY_NO_INPUT_NO_OUTPUT; 3806 hci_stack->ssp_authentication_requirement = SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_GENERAL_BONDING; 3807 hci_stack->ssp_auto_accept = 1; 3808 3809 // Secure Connections: enable (requires support from Controller) 3810 hci_stack->secure_connections_enable = true; 3811 3812 // voice setting - signed 16 bit pcm data with CVSD over the air 3813 hci_stack->sco_voice_setting = 0x60; 3814 3815 #ifdef ENABLE_LE_CENTRAL 3816 // connection parameter to use for outgoing connections 3817 hci_stack->le_connection_scan_interval = 0x0060; // 60ms 3818 hci_stack->le_connection_scan_window = 0x0030; // 30ms 3819 hci_stack->le_connection_interval_min = 0x0008; // 10 ms 3820 hci_stack->le_connection_interval_max = 0x0018; // 30 ms 3821 hci_stack->le_connection_latency = 4; // 4 3822 hci_stack->le_supervision_timeout = 0x0048; // 720 ms 3823 hci_stack->le_minimum_ce_length = 2; // 1.25 ms 3824 hci_stack->le_maximum_ce_length = 0x0030; // 30 ms 3825 3826 // default LE Scanning 3827 hci_stack->le_scan_type = 0x1; // active 3828 hci_stack->le_scan_interval = 0x1e0; // 300 ms 3829 hci_stack->le_scan_window = 0x30; // 30 ms 3830 #endif 3831 3832 #ifdef ENABLE_LE_PERIPHERAL 3833 hci_stack->le_max_number_peripheral_connections = 1; // only single connection as peripheral 3834 #endif 3835 3836 // connection parameter range used to answer connection parameter update requests in l2cap 3837 hci_stack->le_connection_parameter_range.le_conn_interval_min = 6; 3838 hci_stack->le_connection_parameter_range.le_conn_interval_max = 3200; 3839 hci_stack->le_connection_parameter_range.le_conn_latency_min = 0; 3840 hci_stack->le_connection_parameter_range.le_conn_latency_max = 500; 3841 hci_stack->le_connection_parameter_range.le_supervision_timeout_min = 10; 3842 hci_stack->le_connection_parameter_range.le_supervision_timeout_max = 3200; 3843 3844 hci_state_reset(); 3845 } 3846 3847 void hci_deinit(void){ 3848 btstack_run_loop_remove_timer(&hci_stack->timeout); 3849 #ifdef HAVE_MALLOC 3850 if (hci_stack) { 3851 free(hci_stack); 3852 } 3853 #endif 3854 hci_stack = NULL; 3855 3856 #ifdef ENABLE_CLASSIC 3857 disable_l2cap_timeouts = 0; 3858 #endif 3859 } 3860 3861 /** 3862 * @brief Configure Bluetooth chipset driver. Has to be called before power on, or right after receiving the local version information 3863 */ 3864 void hci_set_chipset(const btstack_chipset_t *chipset_driver){ 3865 hci_stack->chipset = chipset_driver; 3866 3867 // reset chipset driver - init is also called on power_up 3868 if (hci_stack->chipset && hci_stack->chipset->init){ 3869 hci_stack->chipset->init(hci_stack->config); 3870 } 3871 } 3872 3873 /** 3874 * @brief Configure Bluetooth hardware control. Has to be called after hci_init() but before power on. 3875 */ 3876 void hci_set_control(const btstack_control_t *hardware_control){ 3877 // references to used control implementation 3878 hci_stack->control = hardware_control; 3879 // init with transport config 3880 hardware_control->init(hci_stack->config); 3881 } 3882 3883 static void hci_discard_connections(void){ 3884 btstack_linked_list_iterator_t lit; 3885 btstack_linked_list_iterator_init(&lit, &hci_stack->connections); 3886 while (btstack_linked_list_iterator_has_next(&lit)){ 3887 // cancel all l2cap connections by emitting dicsconnection complete before shutdown (free) connection 3888 hci_connection_t * connection = (hci_connection_t*) btstack_linked_list_iterator_next(&lit); 3889 hci_emit_disconnection_complete(connection->con_handle, 0x16); // terminated by local host 3890 hci_shutdown_connection(connection); 3891 } 3892 } 3893 3894 void hci_close(void){ 3895 3896 #ifdef ENABLE_CLASSIC 3897 // close remote device db 3898 if (hci_stack->link_key_db) { 3899 hci_stack->link_key_db->close(); 3900 } 3901 #endif 3902 3903 hci_discard_connections(); 3904 3905 hci_power_control(HCI_POWER_OFF); 3906 3907 #ifdef HAVE_MALLOC 3908 free(hci_stack); 3909 #endif 3910 hci_stack = NULL; 3911 } 3912 3913 #ifdef HAVE_SCO_TRANSPORT 3914 void hci_set_sco_transport(const btstack_sco_transport_t *sco_transport){ 3915 hci_stack->sco_transport = sco_transport; 3916 sco_transport->register_packet_handler(&packet_handler); 3917 } 3918 #endif 3919 3920 #ifdef ENABLE_CLASSIC 3921 void gap_set_required_encryption_key_size(uint8_t encryption_key_size){ 3922 // validate ranage and set 3923 if (encryption_key_size < 7) return; 3924 if (encryption_key_size > 16) return; 3925 hci_stack->gap_required_encyrption_key_size = encryption_key_size; 3926 } 3927 3928 uint8_t gap_set_security_mode(gap_security_mode_t security_mode){ 3929 if ((security_mode == GAP_SECURITY_MODE_4) || (security_mode == GAP_SECURITY_MODE_2)){ 3930 hci_stack->gap_security_mode = security_mode; 3931 return ERROR_CODE_SUCCESS; 3932 } else { 3933 return ERROR_CODE_UNSUPPORTED_FEATURE_OR_PARAMETER_VALUE; 3934 } 3935 } 3936 3937 gap_security_mode_t gap_get_security_mode(void){ 3938 return hci_stack->gap_security_mode; 3939 } 3940 3941 void gap_set_security_level(gap_security_level_t security_level){ 3942 hci_stack->gap_security_level = security_level; 3943 } 3944 3945 gap_security_level_t gap_get_security_level(void){ 3946 if (hci_stack->gap_secure_connections_only_mode){ 3947 return LEVEL_4; 3948 } 3949 return hci_stack->gap_security_level; 3950 } 3951 3952 void gap_set_minimal_service_security_level(gap_security_level_t security_level){ 3953 hci_stack->gap_minimal_service_security_level = security_level; 3954 } 3955 3956 void gap_set_secure_connections_only_mode(bool enable){ 3957 hci_stack->gap_secure_connections_only_mode = enable; 3958 } 3959 3960 bool gap_get_secure_connections_only_mode(void){ 3961 return hci_stack->gap_secure_connections_only_mode; 3962 } 3963 #endif 3964 3965 #ifdef ENABLE_CLASSIC 3966 void gap_set_class_of_device(uint32_t class_of_device){ 3967 hci_stack->class_of_device = class_of_device; 3968 hci_stack->gap_tasks_classic |= GAP_TASK_SET_CLASS_OF_DEVICE; 3969 hci_run(); 3970 } 3971 3972 void gap_set_default_link_policy_settings(uint16_t default_link_policy_settings){ 3973 hci_stack->default_link_policy_settings = default_link_policy_settings; 3974 hci_stack->gap_tasks_classic |= GAP_TASK_SET_DEFAULT_LINK_POLICY; 3975 hci_run(); 3976 } 3977 3978 void gap_set_allow_role_switch(bool allow_role_switch){ 3979 hci_stack->allow_role_switch = allow_role_switch ? 1 : 0; 3980 } 3981 3982 uint8_t hci_get_allow_role_switch(void){ 3983 return hci_stack->allow_role_switch; 3984 } 3985 3986 void gap_set_link_supervision_timeout(uint16_t link_supervision_timeout){ 3987 hci_stack->link_supervision_timeout = link_supervision_timeout; 3988 } 3989 3990 void hci_disable_l2cap_timeout_check(void){ 3991 disable_l2cap_timeouts = 1; 3992 } 3993 #endif 3994 3995 #ifndef HAVE_HOST_CONTROLLER_API 3996 // Set Public BD ADDR - passed on to Bluetooth chipset if supported in bt_control_h 3997 void hci_set_bd_addr(bd_addr_t addr){ 3998 (void)memcpy(hci_stack->custom_bd_addr, addr, 6); 3999 hci_stack->custom_bd_addr_set = 1; 4000 } 4001 #endif 4002 4003 // State-Module-Driver overview 4004 // state module low-level 4005 // HCI_STATE_OFF off close 4006 // HCI_STATE_INITIALIZING, on open 4007 // HCI_STATE_WORKING, on open 4008 // HCI_STATE_HALTING, on open 4009 // HCI_STATE_SLEEPING, off/sleep close 4010 // HCI_STATE_FALLING_ASLEEP on open 4011 4012 static int hci_power_control_on(void){ 4013 4014 // power on 4015 int err = 0; 4016 if (hci_stack->control && hci_stack->control->on){ 4017 err = (*hci_stack->control->on)(); 4018 } 4019 if (err){ 4020 log_error( "POWER_ON failed"); 4021 hci_emit_hci_open_failed(); 4022 return err; 4023 } 4024 4025 // int chipset driver 4026 if (hci_stack->chipset && hci_stack->chipset->init){ 4027 hci_stack->chipset->init(hci_stack->config); 4028 } 4029 4030 // init transport 4031 if (hci_stack->hci_transport->init){ 4032 hci_stack->hci_transport->init(hci_stack->config); 4033 } 4034 4035 // open transport 4036 err = hci_stack->hci_transport->open(); 4037 if (err){ 4038 log_error( "HCI_INIT failed, turning Bluetooth off again"); 4039 if (hci_stack->control && hci_stack->control->off){ 4040 (*hci_stack->control->off)(); 4041 } 4042 hci_emit_hci_open_failed(); 4043 return err; 4044 } 4045 return 0; 4046 } 4047 4048 static void hci_power_control_off(void){ 4049 4050 log_info("hci_power_control_off"); 4051 4052 // close low-level device 4053 hci_stack->hci_transport->close(); 4054 4055 log_info("hci_power_control_off - hci_transport closed"); 4056 4057 // power off 4058 if (hci_stack->control && hci_stack->control->off){ 4059 (*hci_stack->control->off)(); 4060 } 4061 4062 log_info("hci_power_control_off - control closed"); 4063 4064 hci_stack->state = HCI_STATE_OFF; 4065 } 4066 4067 static void hci_power_control_sleep(void){ 4068 4069 log_info("hci_power_control_sleep"); 4070 4071 #if 0 4072 // don't close serial port during sleep 4073 4074 // close low-level device 4075 hci_stack->hci_transport->close(hci_stack->config); 4076 #endif 4077 4078 // sleep mode 4079 if (hci_stack->control && hci_stack->control->sleep){ 4080 (*hci_stack->control->sleep)(); 4081 } 4082 4083 hci_stack->state = HCI_STATE_SLEEPING; 4084 } 4085 4086 static int hci_power_control_wake(void){ 4087 4088 log_info("hci_power_control_wake"); 4089 4090 // wake on 4091 if (hci_stack->control && hci_stack->control->wake){ 4092 (*hci_stack->control->wake)(); 4093 } 4094 4095 #if 0 4096 // open low-level device 4097 int err = hci_stack->hci_transport->open(hci_stack->config); 4098 if (err){ 4099 log_error( "HCI_INIT failed, turning Bluetooth off again"); 4100 if (hci_stack->control && hci_stack->control->off){ 4101 (*hci_stack->control->off)(); 4102 } 4103 hci_emit_hci_open_failed(); 4104 return err; 4105 } 4106 #endif 4107 4108 return 0; 4109 } 4110 4111 static void hci_power_transition_to_initializing(void){ 4112 // set up state machine 4113 hci_stack->num_cmd_packets = 1; // assume that one cmd can be sent 4114 hci_stack->hci_packet_buffer_reserved = false; 4115 hci_stack->state = HCI_STATE_INITIALIZING; 4116 hci_stack->substate = HCI_INIT_SEND_RESET; 4117 } 4118 4119 // returns error 4120 static int hci_power_control_state_off(HCI_POWER_MODE power_mode){ 4121 int err; 4122 switch (power_mode){ 4123 case HCI_POWER_ON: 4124 err = hci_power_control_on(); 4125 if (err != 0) { 4126 log_error("hci_power_control_on() error %d", err); 4127 return err; 4128 } 4129 hci_power_transition_to_initializing(); 4130 break; 4131 case HCI_POWER_OFF: 4132 // do nothing 4133 break; 4134 case HCI_POWER_SLEEP: 4135 // do nothing (with SLEEP == OFF) 4136 break; 4137 default: 4138 btstack_assert(false); 4139 break; 4140 } 4141 return ERROR_CODE_SUCCESS; 4142 } 4143 4144 static int hci_power_control_state_initializing(HCI_POWER_MODE power_mode){ 4145 switch (power_mode){ 4146 case HCI_POWER_ON: 4147 // do nothing 4148 break; 4149 case HCI_POWER_OFF: 4150 // no connections yet, just turn it off 4151 hci_power_control_off(); 4152 break; 4153 case HCI_POWER_SLEEP: 4154 // no connections yet, just turn it off 4155 hci_power_control_sleep(); 4156 break; 4157 default: 4158 btstack_assert(false); 4159 break; 4160 } 4161 return ERROR_CODE_SUCCESS; 4162 } 4163 4164 static int hci_power_control_state_working(HCI_POWER_MODE power_mode) { 4165 switch (power_mode){ 4166 case HCI_POWER_ON: 4167 // do nothing 4168 break; 4169 case HCI_POWER_OFF: 4170 // see hci_run 4171 hci_stack->state = HCI_STATE_HALTING; 4172 hci_stack->substate = HCI_HALTING_DISCONNECT_ALL_NO_TIMER; 4173 // setup watchdog timer for disconnect - only triggers if Controller does not respond anymore 4174 btstack_run_loop_set_timer(&hci_stack->timeout, 1000); 4175 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_halting_timeout_handler); 4176 btstack_run_loop_add_timer(&hci_stack->timeout); 4177 break; 4178 case HCI_POWER_SLEEP: 4179 // see hci_run 4180 hci_stack->state = HCI_STATE_FALLING_ASLEEP; 4181 hci_stack->substate = HCI_FALLING_ASLEEP_DISCONNECT; 4182 break; 4183 default: 4184 btstack_assert(false); 4185 break; 4186 } 4187 return ERROR_CODE_SUCCESS; 4188 } 4189 4190 static int hci_power_control_state_halting(HCI_POWER_MODE power_mode) { 4191 switch (power_mode){ 4192 case HCI_POWER_ON: 4193 hci_power_transition_to_initializing(); 4194 break; 4195 case HCI_POWER_OFF: 4196 // do nothing 4197 break; 4198 case HCI_POWER_SLEEP: 4199 // see hci_run 4200 hci_stack->state = HCI_STATE_FALLING_ASLEEP; 4201 hci_stack->substate = HCI_FALLING_ASLEEP_DISCONNECT; 4202 break; 4203 default: 4204 btstack_assert(false); 4205 break; 4206 } 4207 return ERROR_CODE_SUCCESS; 4208 } 4209 4210 static int hci_power_control_state_falling_asleep(HCI_POWER_MODE power_mode) { 4211 switch (power_mode){ 4212 case HCI_POWER_ON: 4213 hci_power_transition_to_initializing(); 4214 break; 4215 case HCI_POWER_OFF: 4216 // see hci_run 4217 hci_stack->state = HCI_STATE_HALTING; 4218 hci_stack->substate = HCI_HALTING_DISCONNECT_ALL_NO_TIMER; 4219 break; 4220 case HCI_POWER_SLEEP: 4221 // do nothing 4222 break; 4223 default: 4224 btstack_assert(false); 4225 break; 4226 } 4227 return ERROR_CODE_SUCCESS; 4228 } 4229 4230 static int hci_power_control_state_sleeping(HCI_POWER_MODE power_mode) { 4231 int err; 4232 switch (power_mode){ 4233 case HCI_POWER_ON: 4234 err = hci_power_control_wake(); 4235 if (err) return err; 4236 hci_power_transition_to_initializing(); 4237 break; 4238 case HCI_POWER_OFF: 4239 hci_stack->state = HCI_STATE_HALTING; 4240 hci_stack->substate = HCI_HALTING_DISCONNECT_ALL_NO_TIMER; 4241 break; 4242 case HCI_POWER_SLEEP: 4243 // do nothing 4244 break; 4245 default: 4246 btstack_assert(false); 4247 break; 4248 } 4249 return ERROR_CODE_SUCCESS; 4250 } 4251 4252 int hci_power_control(HCI_POWER_MODE power_mode){ 4253 log_info("hci_power_control: %d, current mode %u", power_mode, hci_stack->state); 4254 int err = 0; 4255 switch (hci_stack->state){ 4256 case HCI_STATE_OFF: 4257 err = hci_power_control_state_off(power_mode); 4258 break; 4259 case HCI_STATE_INITIALIZING: 4260 err = hci_power_control_state_initializing(power_mode); 4261 break; 4262 case HCI_STATE_WORKING: 4263 err = hci_power_control_state_working(power_mode); 4264 break; 4265 case HCI_STATE_HALTING: 4266 err = hci_power_control_state_halting(power_mode); 4267 break; 4268 case HCI_STATE_FALLING_ASLEEP: 4269 err = hci_power_control_state_falling_asleep(power_mode); 4270 break; 4271 case HCI_STATE_SLEEPING: 4272 err = hci_power_control_state_sleeping(power_mode); 4273 break; 4274 default: 4275 btstack_assert(false); 4276 break; 4277 } 4278 if (err != 0){ 4279 return err; 4280 } 4281 4282 // create internal event 4283 hci_emit_state(); 4284 4285 // trigger next/first action 4286 hci_run(); 4287 4288 return 0; 4289 } 4290 4291 4292 static void hci_halting_run(void) { 4293 4294 log_info("HCI_STATE_HALTING, substate %x\n", hci_stack->substate); 4295 4296 hci_connection_t *connection; 4297 4298 switch (hci_stack->substate) { 4299 case HCI_HALTING_DISCONNECT_ALL_NO_TIMER: 4300 case HCI_HALTING_DISCONNECT_ALL_TIMER: 4301 4302 #ifdef ENABLE_BLE 4303 #ifdef ENABLE_LE_CENTRAL 4304 hci_whitelist_free(); 4305 #endif 4306 #endif 4307 // close all open connections 4308 connection = (hci_connection_t *) hci_stack->connections; 4309 if (connection) { 4310 hci_con_handle_t con_handle = (uint16_t) connection->con_handle; 4311 if (!hci_can_send_command_packet_now()) return; 4312 4313 // check state 4314 if (connection->state == SENT_DISCONNECT) return; 4315 connection->state = SENT_DISCONNECT; 4316 4317 log_info("HCI_STATE_HALTING, connection %p, handle %u", connection, con_handle); 4318 4319 // cancel all l2cap connections right away instead of waiting for disconnection complete event ... 4320 hci_emit_disconnection_complete(con_handle, 0x16); // terminated by local host 4321 4322 // ... which would be ignored anyway as we shutdown (free) the connection now 4323 hci_shutdown_connection(connection); 4324 4325 // finally, send the disconnect command 4326 hci_send_cmd(&hci_disconnect, con_handle, ERROR_CODE_REMOTE_USER_TERMINATED_CONNECTION); 4327 return; 4328 } 4329 4330 btstack_run_loop_remove_timer(&hci_stack->timeout); 4331 4332 if (hci_stack->substate == HCI_HALTING_DISCONNECT_ALL_TIMER) { 4333 // no connections left, wait a bit to assert that btstack_cyrpto isn't waiting for an HCI event 4334 log_info("HCI_STATE_HALTING: wait 50 ms"); 4335 hci_stack->substate = HCI_HALTING_W4_TIMER; 4336 btstack_run_loop_set_timer(&hci_stack->timeout, 50); 4337 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_halting_timeout_handler); 4338 btstack_run_loop_add_timer(&hci_stack->timeout); 4339 break; 4340 } 4341 4342 /* fall through */ 4343 4344 case HCI_HALTING_CLOSE: 4345 // close left over connections (that had not been properly closed before) 4346 hci_discard_connections(); 4347 4348 log_info("HCI_STATE_HALTING, calling off"); 4349 4350 // switch mode 4351 hci_power_control_off(); 4352 4353 log_info("HCI_STATE_HALTING, emitting state"); 4354 hci_emit_state(); 4355 log_info("HCI_STATE_HALTING, done"); 4356 break; 4357 4358 case HCI_HALTING_W4_TIMER: 4359 // keep waiting 4360 4361 break; 4362 default: 4363 break; 4364 } 4365 }; 4366 4367 static void hci_falling_asleep_run(void){ 4368 hci_connection_t * connection; 4369 switch(hci_stack->substate) { 4370 case HCI_FALLING_ASLEEP_DISCONNECT: 4371 log_info("HCI_STATE_FALLING_ASLEEP"); 4372 // close all open connections 4373 connection = (hci_connection_t *) hci_stack->connections; 4374 if (connection){ 4375 4376 // send disconnect 4377 if (!hci_can_send_command_packet_now()) return; 4378 4379 log_info("HCI_STATE_FALLING_ASLEEP, connection %p, handle %u", connection, (uint16_t)connection->con_handle); 4380 hci_send_cmd(&hci_disconnect, connection->con_handle, ERROR_CODE_REMOTE_USER_TERMINATED_CONNECTION); 4381 4382 // send disconnected event right away - causes higher layer connections to get closed, too. 4383 hci_shutdown_connection(connection); 4384 return; 4385 } 4386 4387 if (hci_classic_supported()){ 4388 // disable page and inquiry scan 4389 if (!hci_can_send_command_packet_now()) return; 4390 4391 log_info("HCI_STATE_HALTING, disabling inq scans"); 4392 hci_send_cmd(&hci_write_scan_enable, hci_stack->connectable << 1); // drop inquiry scan but keep page scan 4393 4394 // continue in next sub state 4395 hci_stack->substate = HCI_FALLING_ASLEEP_W4_WRITE_SCAN_ENABLE; 4396 break; 4397 } 4398 4399 /* fall through */ 4400 4401 case HCI_FALLING_ASLEEP_COMPLETE: 4402 log_info("HCI_STATE_HALTING, calling sleep"); 4403 // switch mode 4404 hci_power_control_sleep(); // changes hci_stack->state to SLEEP 4405 hci_emit_state(); 4406 break; 4407 4408 default: 4409 break; 4410 } 4411 } 4412 4413 #ifdef ENABLE_CLASSIC 4414 4415 static void hci_update_scan_enable(void){ 4416 // 2 = page scan, 1 = inq scan 4417 hci_stack->new_scan_enable_value = (hci_stack->connectable << 1) | hci_stack->discoverable; 4418 hci_stack->gap_tasks_classic |= GAP_TASK_WRITE_SCAN_ENABLE; 4419 hci_run(); 4420 } 4421 4422 void gap_discoverable_control(uint8_t enable){ 4423 if (enable) enable = 1; // normalize argument 4424 4425 if (hci_stack->discoverable == enable){ 4426 hci_emit_discoverable_enabled(hci_stack->discoverable); 4427 return; 4428 } 4429 4430 hci_stack->discoverable = enable; 4431 hci_update_scan_enable(); 4432 } 4433 4434 void gap_connectable_control(uint8_t enable){ 4435 if (enable) enable = 1; // normalize argument 4436 4437 // don't emit event 4438 if (hci_stack->connectable == enable) return; 4439 4440 hci_stack->connectable = enable; 4441 hci_update_scan_enable(); 4442 } 4443 #endif 4444 4445 void gap_local_bd_addr(bd_addr_t address_buffer){ 4446 (void)memcpy(address_buffer, hci_stack->local_bd_addr, 6); 4447 } 4448 4449 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 4450 static void hci_host_num_completed_packets(void){ 4451 4452 // create packet manually as arrays are not supported and num_commands should not get reduced 4453 hci_reserve_packet_buffer(); 4454 uint8_t * packet = hci_get_outgoing_packet_buffer(); 4455 4456 uint16_t size = 0; 4457 uint16_t num_handles = 0; 4458 packet[size++] = 0x35; 4459 packet[size++] = 0x0c; 4460 size++; // skip param len 4461 size++; // skip num handles 4462 4463 // add { handle, packets } entries 4464 btstack_linked_item_t * it; 4465 for (it = (btstack_linked_item_t *) hci_stack->connections; it ; it = it->next){ 4466 hci_connection_t * connection = (hci_connection_t *) it; 4467 if (connection->num_packets_completed){ 4468 little_endian_store_16(packet, size, connection->con_handle); 4469 size += 2; 4470 little_endian_store_16(packet, size, connection->num_packets_completed); 4471 size += 2; 4472 // 4473 num_handles++; 4474 connection->num_packets_completed = 0; 4475 } 4476 } 4477 4478 packet[2] = size - 3; 4479 packet[3] = num_handles; 4480 4481 hci_stack->host_completed_packets = 0; 4482 4483 hci_dump_packet(HCI_COMMAND_DATA_PACKET, 0, packet, size); 4484 hci_stack->hci_transport->send_packet(HCI_COMMAND_DATA_PACKET, packet, size); 4485 4486 // release packet buffer for synchronous transport implementations 4487 if (hci_transport_synchronous()){ 4488 hci_release_packet_buffer(); 4489 hci_emit_transport_packet_sent(); 4490 } 4491 } 4492 #endif 4493 4494 static void hci_halting_timeout_handler(btstack_timer_source_t * ds){ 4495 UNUSED(ds); 4496 hci_stack->substate = HCI_HALTING_CLOSE; 4497 // allow packet handlers to defer final shutdown 4498 hci_emit_state(); 4499 hci_run(); 4500 } 4501 4502 static bool hci_run_acl_fragments(void){ 4503 if (hci_stack->acl_fragmentation_total_size > 0u) { 4504 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(hci_stack->hci_packet_buffer); 4505 hci_connection_t *connection = hci_connection_for_handle(con_handle); 4506 if (connection) { 4507 if (hci_can_send_prepared_acl_packet_now(con_handle)){ 4508 hci_send_acl_packet_fragments(connection); 4509 return true; 4510 } 4511 } else { 4512 // connection gone -> discard further fragments 4513 log_info("hci_run: fragmented ACL packet no connection -> discard fragment"); 4514 hci_stack->acl_fragmentation_total_size = 0; 4515 hci_stack->acl_fragmentation_pos = 0; 4516 } 4517 } 4518 return false; 4519 } 4520 4521 #ifdef ENABLE_CLASSIC 4522 4523 #ifdef ENABLE_HCI_SERIALIZED_CONTROLLER_OPERATIONS 4524 static bool hci_classic_operation_active(void) { 4525 if (hci_stack->inquiry_state >= GAP_INQUIRY_STATE_W4_ACTIVE){ 4526 return true; 4527 } 4528 if (hci_stack->remote_name_state == GAP_REMOTE_NAME_STATE_W4_COMPLETE){ 4529 return true; 4530 } 4531 btstack_linked_item_t * it; 4532 for (it = (btstack_linked_item_t *) hci_stack->connections; it != NULL; it = it->next) { 4533 hci_connection_t *connection = (hci_connection_t *) it; 4534 switch (connection->state) { 4535 case SENT_CREATE_CONNECTION: 4536 case SENT_CANCEL_CONNECTION: 4537 case SENT_DISCONNECT: 4538 return true; 4539 default: 4540 break; 4541 } 4542 } 4543 return false; 4544 } 4545 #endif 4546 4547 static bool hci_run_general_gap_classic(void){ 4548 4549 // assert stack is working and classic is active 4550 if (hci_classic_supported() == false) return false; 4551 if (hci_stack->state != HCI_STATE_WORKING) return false; 4552 4553 // decline incoming connections 4554 if (hci_stack->decline_reason){ 4555 uint8_t reason = hci_stack->decline_reason; 4556 hci_stack->decline_reason = 0; 4557 hci_send_cmd(&hci_reject_connection_request, hci_stack->decline_addr, reason); 4558 return true; 4559 } 4560 4561 if (hci_stack->gap_tasks_classic != 0){ 4562 hci_run_gap_tasks_classic(); 4563 return true; 4564 } 4565 4566 // start/stop inquiry 4567 if ((hci_stack->inquiry_state >= GAP_INQUIRY_DURATION_MIN) && (hci_stack->inquiry_state <= GAP_INQUIRY_DURATION_MAX)){ 4568 #ifdef ENABLE_HCI_SERIALIZED_CONTROLLER_OPERATIONS 4569 if (hci_classic_operation_active() == false) 4570 #endif 4571 { 4572 uint8_t duration = hci_stack->inquiry_state; 4573 hci_stack->inquiry_state = GAP_INQUIRY_STATE_W4_ACTIVE; 4574 hci_send_cmd(&hci_inquiry, hci_stack->inquiry_lap, duration, 0); 4575 return true; 4576 } 4577 } 4578 if (hci_stack->inquiry_state == GAP_INQUIRY_STATE_W2_CANCEL){ 4579 hci_stack->inquiry_state = GAP_INQUIRY_STATE_W4_CANCELLED; 4580 hci_send_cmd(&hci_inquiry_cancel); 4581 return true; 4582 } 4583 // remote name request 4584 if (hci_stack->remote_name_state == GAP_REMOTE_NAME_STATE_W2_SEND){ 4585 #ifdef ENABLE_HCI_SERIALIZED_CONTROLLER_OPERATIONS 4586 if (hci_classic_operation_active() == false) 4587 #endif 4588 { 4589 hci_stack->remote_name_state = GAP_REMOTE_NAME_STATE_W4_COMPLETE; 4590 hci_send_cmd(&hci_remote_name_request, hci_stack->remote_name_addr, 4591 hci_stack->remote_name_page_scan_repetition_mode, 0, hci_stack->remote_name_clock_offset); 4592 return true; 4593 } 4594 } 4595 #ifdef ENABLE_CLASSIC_PAIRING_OOB 4596 // Local OOB data 4597 if (hci_stack->classic_read_local_oob_data){ 4598 hci_stack->classic_read_local_oob_data = false; 4599 if (hci_command_supported(SUPPORTED_HCI_COMMAND_READ_LOCAL_OOB_EXTENDED_DATA_COMMAND)){ 4600 hci_send_cmd(&hci_read_local_extended_oob_data); 4601 } else { 4602 hci_send_cmd(&hci_read_local_oob_data); 4603 } 4604 } 4605 #endif 4606 // pairing 4607 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE){ 4608 uint8_t state = hci_stack->gap_pairing_state; 4609 uint8_t pin_code[16]; 4610 switch (state){ 4611 case GAP_PAIRING_STATE_SEND_PIN: 4612 hci_stack->gap_pairing_state = GAP_PAIRING_STATE_IDLE; 4613 memset(pin_code, 0, 16); 4614 memcpy(pin_code, hci_stack->gap_pairing_input.gap_pairing_pin, hci_stack->gap_pairing_pin_len); 4615 hci_send_cmd(&hci_pin_code_request_reply, hci_stack->gap_pairing_addr, hci_stack->gap_pairing_pin_len, pin_code); 4616 break; 4617 case GAP_PAIRING_STATE_SEND_PIN_NEGATIVE: 4618 hci_stack->gap_pairing_state = GAP_PAIRING_STATE_WAIT_FOR_COMMAND_COMPLETE; 4619 hci_send_cmd(&hci_pin_code_request_negative_reply, hci_stack->gap_pairing_addr); 4620 break; 4621 case GAP_PAIRING_STATE_SEND_PASSKEY: 4622 hci_stack->gap_pairing_state = GAP_PAIRING_STATE_IDLE; 4623 hci_send_cmd(&hci_user_passkey_request_reply, hci_stack->gap_pairing_addr, hci_stack->gap_pairing_input.gap_pairing_passkey); 4624 break; 4625 case GAP_PAIRING_STATE_SEND_PASSKEY_NEGATIVE: 4626 hci_stack->gap_pairing_state = GAP_PAIRING_STATE_WAIT_FOR_COMMAND_COMPLETE; 4627 hci_send_cmd(&hci_user_passkey_request_negative_reply, hci_stack->gap_pairing_addr); 4628 break; 4629 case GAP_PAIRING_STATE_SEND_CONFIRMATION: 4630 hci_stack->gap_pairing_state = GAP_PAIRING_STATE_IDLE; 4631 hci_send_cmd(&hci_user_confirmation_request_reply, hci_stack->gap_pairing_addr); 4632 break; 4633 case GAP_PAIRING_STATE_SEND_CONFIRMATION_NEGATIVE: 4634 hci_stack->gap_pairing_state = GAP_PAIRING_STATE_WAIT_FOR_COMMAND_COMPLETE; 4635 hci_send_cmd(&hci_user_confirmation_request_negative_reply, hci_stack->gap_pairing_addr); 4636 break; 4637 default: 4638 break; 4639 } 4640 return true; 4641 } 4642 return false; 4643 } 4644 #endif 4645 4646 #ifdef ENABLE_BLE 4647 4648 #ifdef ENABLE_LE_PERIPHERAL 4649 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 4650 uint8_t hci_le_extended_advertising_operation_for_chunk(uint16_t pos, uint16_t len){ 4651 uint8_t operation = 0; 4652 if (pos == 0){ 4653 // first fragment or complete data 4654 operation |= 1; 4655 } 4656 if (pos + LE_EXTENDED_ADVERTISING_MAX_CHUNK_LEN >= len){ 4657 // last fragment or complete data 4658 operation |= 2; 4659 } 4660 return operation; 4661 } 4662 #endif 4663 #endif 4664 4665 static bool hci_run_general_gap_le(void){ 4666 4667 // Phase 1: collect what to stop 4668 4669 bool scanning_stop = false; 4670 bool connecting_stop = false; 4671 bool advertising_stop = false; 4672 4673 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 4674 le_advertising_set_t * advertising_stop_set = NULL; 4675 bool periodic_stop = false; 4676 #endif 4677 4678 #ifndef ENABLE_LE_CENTRAL 4679 UNUSED(scanning_stop); 4680 UNUSED(connecting_stop); 4681 #endif 4682 #ifndef ENABLE_LE_PERIPHERAL 4683 UNUSED(advertising_stop); 4684 #endif 4685 4686 // check if own address changes 4687 bool random_address_change = (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_ADDRESS) != 0; 4688 4689 // check if whitelist needs modification 4690 bool whitelist_modification_pending = false; 4691 btstack_linked_list_iterator_t lit; 4692 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 4693 while (btstack_linked_list_iterator_has_next(&lit)){ 4694 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&lit); 4695 if (entry->state & (LE_WHITELIST_REMOVE_FROM_CONTROLLER | LE_WHITELIST_ADD_TO_CONTROLLER)){ 4696 whitelist_modification_pending = true; 4697 break; 4698 } 4699 } 4700 // check if resolving list needs modification 4701 bool resolving_list_modification_pending = false; 4702 #ifdef ENABLE_LE_PRIVACY_ADDRESS_RESOLUTION 4703 4704 bool resolving_list_supported = hci_command_supported(SUPPORTED_HCI_COMMAND_LE_SET_ADDRESS_RESOLUTION_ENABLE); 4705 if (resolving_list_supported && hci_stack->le_resolving_list_state != LE_RESOLVING_LIST_DONE){ 4706 resolving_list_modification_pending = true; 4707 } 4708 #endif 4709 4710 #ifdef ENABLE_LE_CENTRAL 4711 // scanning control 4712 if (hci_stack->le_scanning_active) { 4713 // stop if: 4714 // - parameter change required 4715 // - it's disabled 4716 // - whitelist change required but used for scanning 4717 // - resolving list modified 4718 // - own address changes 4719 bool scanning_uses_whitelist = (hci_stack->le_scan_filter_policy & 1) == 1; 4720 if ((hci_stack->le_scanning_param_update) || 4721 !hci_stack->le_scanning_enabled || 4722 scanning_uses_whitelist || 4723 resolving_list_modification_pending || 4724 random_address_change){ 4725 4726 scanning_stop = true; 4727 } 4728 } 4729 #endif 4730 4731 #ifdef ENABLE_LE_CENTRAL 4732 // connecting control 4733 bool connecting_with_whitelist; 4734 switch (hci_stack->le_connecting_state){ 4735 case LE_CONNECTING_DIRECT: 4736 case LE_CONNECTING_WHITELIST: 4737 // stop connecting if: 4738 // - connecting uses white and whitelist modification pending 4739 // - if it got disabled 4740 // - resolving list modified 4741 // - own address changes 4742 connecting_with_whitelist = hci_stack->le_connecting_state == LE_CONNECTING_WHITELIST; 4743 if ((connecting_with_whitelist && whitelist_modification_pending) || 4744 (hci_stack->le_connecting_request == LE_CONNECTING_IDLE) || 4745 resolving_list_modification_pending || 4746 random_address_change) { 4747 4748 connecting_stop = true; 4749 } 4750 break; 4751 default: 4752 break; 4753 } 4754 #endif 4755 4756 #ifdef ENABLE_LE_PERIPHERAL 4757 // le advertisement control 4758 if ((hci_stack->le_advertisements_state & LE_ADVERTISEMENT_STATE_ACTIVE) != 0){ 4759 // stop if: 4760 // - parameter change required 4761 // - random address used in advertising and changes 4762 // - it's disabled 4763 // - whitelist change required but used for advertisement filter policy 4764 // - resolving list modified 4765 // - own address changes 4766 bool advertising_uses_whitelist = hci_stack->le_advertisements_filter_policy != 0; 4767 bool advertising_uses_random_address = hci_stack->le_own_addr_type != BD_ADDR_TYPE_LE_PUBLIC; 4768 bool advertising_change = (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_PARAMS) != 0; 4769 if (advertising_change || 4770 (advertising_uses_random_address && random_address_change) || 4771 (hci_stack->le_advertisements_enabled_for_current_roles == 0) || 4772 (advertising_uses_whitelist && whitelist_modification_pending) || 4773 resolving_list_modification_pending || 4774 random_address_change) { 4775 4776 advertising_stop = true; 4777 } 4778 } 4779 4780 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 4781 if (hci_extended_advertising_supported() && (advertising_stop == false)){ 4782 btstack_linked_list_iterator_t it; 4783 btstack_linked_list_iterator_init(&it, &hci_stack->le_advertising_sets); 4784 while (btstack_linked_list_iterator_has_next(&it)){ 4785 le_advertising_set_t * advertising_set = (le_advertising_set_t*) btstack_linked_list_iterator_next(&it); 4786 if ((advertising_set->state & LE_ADVERTISEMENT_STATE_ACTIVE) != 0) { 4787 // stop if: 4788 // - parameter change required 4789 // - random address used in connectable advertising and changes 4790 // - it's disabled 4791 // - whitelist change required but used for advertisement filter policy 4792 // - resolving list modified 4793 // - own address changes 4794 // - advertisement set will be removed 4795 bool advertising_uses_whitelist = advertising_set->extended_params.advertising_filter_policy != 0; 4796 bool advertising_connectable = (advertising_set->extended_params.advertising_event_properties & 1) != 0; 4797 bool advertising_uses_random_address = 4798 (advertising_set->extended_params.own_address_type != BD_ADDR_TYPE_LE_PUBLIC) && 4799 advertising_connectable; 4800 bool advertising_parameter_change = (advertising_set->tasks & LE_ADVERTISEMENT_TASKS_SET_PARAMS) != 0; 4801 bool advertising_enabled = (advertising_set->state & LE_ADVERTISEMENT_STATE_ENABLED) != 0; 4802 bool advertising_set_random_address_change = 4803 (advertising_set->tasks & LE_ADVERTISEMENT_TASKS_SET_ADDRESS) != 0; 4804 bool advertising_set_will_be_removed = 4805 (advertising_set->state & LE_ADVERTISEMENT_TASKS_REMOVE_SET) != 0; 4806 if (advertising_parameter_change || 4807 (advertising_uses_random_address && advertising_set_random_address_change) || 4808 (advertising_enabled == false) || 4809 (advertising_uses_whitelist && whitelist_modification_pending) || 4810 resolving_list_modification_pending || 4811 advertising_set_will_be_removed) { 4812 4813 advertising_stop = true; 4814 advertising_stop_set = advertising_set; 4815 break; 4816 } 4817 } 4818 if ((advertising_set->state & LE_ADVERTISEMENT_STATE_PERIODIC_ACTIVE) != 0) { 4819 // stop if: 4820 // - it's disabled 4821 // - parameter change required 4822 bool periodic_enabled = (advertising_set->state & LE_ADVERTISEMENT_STATE_PERIODIC_ENABLED) != 0; 4823 bool periodic_parameter_change = (advertising_set->tasks & LE_ADVERTISEMENT_TASKS_SET_PERIODIC_PARAMS) != 0; 4824 if ((periodic_enabled == false) || periodic_parameter_change){ 4825 periodic_stop = true; 4826 advertising_stop_set = advertising_set; 4827 } 4828 } 4829 } 4830 } 4831 #endif 4832 4833 #endif 4834 4835 4836 // Phase 2: stop everything that should be off during modifications 4837 4838 #ifdef ENABLE_LE_CENTRAL 4839 if (scanning_stop){ 4840 hci_stack->le_scanning_active = false; 4841 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 4842 if (hci_extended_advertising_supported()) { 4843 hci_send_cmd(&hci_le_set_extended_scan_enable, 0, 0, 0, 0); 4844 } else 4845 #endif 4846 { 4847 hci_send_cmd(&hci_le_set_scan_enable, 0, 0); 4848 } 4849 return true; 4850 } 4851 #endif 4852 4853 #ifdef ENABLE_LE_CENTRAL 4854 if (connecting_stop){ 4855 hci_send_cmd(&hci_le_create_connection_cancel); 4856 return true; 4857 } 4858 #endif 4859 4860 #ifdef ENABLE_LE_PERIPHERAL 4861 if (advertising_stop){ 4862 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 4863 if (hci_extended_advertising_supported()) { 4864 uint8_t advertising_stop_handle; 4865 if (advertising_stop_set != NULL){ 4866 advertising_stop_handle = advertising_stop_set->advertising_handle; 4867 advertising_stop_set->state &= ~LE_ADVERTISEMENT_STATE_ACTIVE; 4868 } else { 4869 advertising_stop_handle = 0; 4870 hci_stack->le_advertisements_state &= ~LE_ADVERTISEMENT_STATE_ACTIVE; 4871 } 4872 const uint8_t advertising_handles[] = { advertising_stop_handle }; 4873 const uint16_t durations[] = { 0 }; 4874 const uint16_t max_events[] = { 0 }; 4875 hci_send_cmd(&hci_le_set_extended_advertising_enable, 0, 1, advertising_handles, durations, max_events); 4876 } else 4877 #endif 4878 { 4879 hci_stack->le_advertisements_state &= ~LE_ADVERTISEMENT_STATE_ACTIVE; 4880 hci_send_cmd(&hci_le_set_advertise_enable, 0); 4881 } 4882 return true; 4883 } 4884 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 4885 if (periodic_stop){ 4886 advertising_stop_set->state &= ~LE_ADVERTISEMENT_STATE_PERIODIC_ACTIVE; 4887 hci_send_cmd(&hci_le_set_periodic_advertising_enable, 0, advertising_stop_set->advertising_handle); 4888 return true; 4889 } 4890 #endif 4891 #endif 4892 4893 // Phase 3: modify 4894 4895 if (random_address_change){ 4896 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_SET_ADDRESS; 4897 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 4898 if (hci_extended_advertising_supported()) { 4899 hci_send_cmd(&hci_le_set_advertising_set_random_address, 0, hci_stack->le_random_address); 4900 } 4901 #endif 4902 { 4903 hci_send_cmd(&hci_le_set_random_address, hci_stack->le_random_address); 4904 } 4905 return true; 4906 } 4907 4908 #ifdef ENABLE_LE_CENTRAL 4909 if (hci_stack->le_scanning_param_update){ 4910 hci_stack->le_scanning_param_update = false; 4911 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 4912 if (hci_extended_advertising_supported()){ 4913 // prepare arrays for all PHYs 4914 uint8_t scan_types[1] = { hci_stack->le_scan_type }; 4915 uint16_t scan_intervals[1] = { hci_stack->le_scan_interval }; 4916 uint16_t scan_windows[1] = { hci_stack->le_scan_window }; 4917 uint8_t scanning_phys = 1; // LE 1M PHY 4918 hci_send_cmd(&hci_le_set_extended_scan_parameters, hci_stack->le_own_addr_type, 4919 hci_stack->le_scan_filter_policy, scanning_phys, scan_types, scan_intervals, scan_windows); 4920 } else 4921 #endif 4922 { 4923 hci_send_cmd(&hci_le_set_scan_parameters, hci_stack->le_scan_type, hci_stack->le_scan_interval, hci_stack->le_scan_window, 4924 hci_stack->le_own_addr_type, hci_stack->le_scan_filter_policy); 4925 } 4926 return true; 4927 } 4928 #endif 4929 4930 #ifdef ENABLE_LE_PERIPHERAL 4931 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_PARAMS){ 4932 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_SET_PARAMS; 4933 hci_stack->le_advertisements_own_addr_type = hci_stack->le_own_addr_type; 4934 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 4935 if (hci_extended_advertising_supported()){ 4936 // map advertisment type to advertising event properties 4937 uint16_t adv_event_properties = 0; 4938 const uint16_t mapping[] = { 0b00010011, 0b00010101, 0b00011101, 0b00010010, 0b00010000}; 4939 if (hci_stack->le_advertisements_type < (sizeof(mapping)/sizeof(uint16_t))){ 4940 adv_event_properties = mapping[hci_stack->le_advertisements_type]; 4941 } 4942 hci_stack->le_advertising_set_in_current_command = 0; 4943 hci_send_cmd(&hci_le_set_extended_advertising_parameters, 4944 0, 4945 adv_event_properties, 4946 hci_stack->le_advertisements_interval_min, 4947 hci_stack->le_advertisements_interval_max, 4948 hci_stack->le_advertisements_channel_map, 4949 hci_stack->le_advertisements_own_addr_type, 4950 hci_stack->le_advertisements_direct_address_type, 4951 hci_stack->le_advertisements_direct_address, 4952 hci_stack->le_advertisements_filter_policy, 4953 0x7f, // tx power: no preference 4954 0x01, // primary adv phy: LE 1M 4955 0, // secondary adv max skip 4956 0, // secondary adv phy 4957 0, // adv sid 4958 0 // scan request notification 4959 ); 4960 } 4961 #endif 4962 { 4963 hci_send_cmd(&hci_le_set_advertising_parameters, 4964 hci_stack->le_advertisements_interval_min, 4965 hci_stack->le_advertisements_interval_max, 4966 hci_stack->le_advertisements_type, 4967 hci_stack->le_advertisements_own_addr_type, 4968 hci_stack->le_advertisements_direct_address_type, 4969 hci_stack->le_advertisements_direct_address, 4970 hci_stack->le_advertisements_channel_map, 4971 hci_stack->le_advertisements_filter_policy); 4972 } 4973 return true; 4974 } 4975 4976 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_ADV_DATA){ 4977 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_SET_ADV_DATA; 4978 uint8_t adv_data_clean[31]; 4979 memset(adv_data_clean, 0, sizeof(adv_data_clean)); 4980 (void)memcpy(adv_data_clean, hci_stack->le_advertisements_data, 4981 hci_stack->le_advertisements_data_len); 4982 btstack_replace_bd_addr_placeholder(adv_data_clean, hci_stack->le_advertisements_data_len, hci_stack->local_bd_addr); 4983 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 4984 if (hci_extended_advertising_supported()){ 4985 hci_stack->le_advertising_set_in_current_command = 0; 4986 hci_send_cmd(&hci_le_set_extended_advertising_data, 0, 0x03, 0x01, hci_stack->le_advertisements_data_len, adv_data_clean); 4987 } else 4988 #endif 4989 { 4990 hci_send_cmd(&hci_le_set_advertising_data, hci_stack->le_advertisements_data_len, adv_data_clean); 4991 } 4992 return true; 4993 } 4994 4995 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA){ 4996 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA; 4997 uint8_t scan_data_clean[31]; 4998 memset(scan_data_clean, 0, sizeof(scan_data_clean)); 4999 (void)memcpy(scan_data_clean, hci_stack->le_scan_response_data, 5000 hci_stack->le_scan_response_data_len); 5001 btstack_replace_bd_addr_placeholder(scan_data_clean, hci_stack->le_scan_response_data_len, hci_stack->local_bd_addr); 5002 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 5003 if (hci_extended_advertising_supported()){ 5004 hci_stack->le_advertising_set_in_current_command = 0; 5005 hci_send_cmd(&hci_le_set_extended_scan_response_data, 0, 0x03, 0x01, hci_stack->le_scan_response_data_len, scan_data_clean); 5006 } else 5007 #endif 5008 { 5009 hci_send_cmd(&hci_le_set_scan_response_data, hci_stack->le_scan_response_data_len, scan_data_clean); 5010 } 5011 return true; 5012 } 5013 5014 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 5015 if (hci_extended_advertising_supported()) { 5016 btstack_linked_list_iterator_t it; 5017 btstack_linked_list_iterator_init(&it, &hci_stack->le_advertising_sets); 5018 while (btstack_linked_list_iterator_has_next(&it)){ 5019 le_advertising_set_t * advertising_set = (le_advertising_set_t*) btstack_linked_list_iterator_next(&it); 5020 if ((advertising_set->tasks & LE_ADVERTISEMENT_TASKS_REMOVE_SET) != 0) { 5021 advertising_set->tasks &= ~LE_ADVERTISEMENT_TASKS_REMOVE_SET; 5022 hci_stack->le_advertising_set_in_current_command = advertising_set->advertising_handle; 5023 hci_send_cmd(&hci_le_remove_advertising_set, advertising_set->advertising_handle); 5024 return true; 5025 } 5026 if ((advertising_set->tasks & LE_ADVERTISEMENT_TASKS_SET_ADDRESS) != 0){ 5027 advertising_set->tasks &= ~LE_ADVERTISEMENT_TASKS_SET_ADDRESS; 5028 hci_send_cmd(&hci_le_set_advertising_set_random_address, advertising_set->advertising_handle, advertising_set->random_address); 5029 return true; 5030 } 5031 if ((advertising_set->tasks & LE_ADVERTISEMENT_TASKS_SET_PARAMS) != 0){ 5032 advertising_set->tasks &= ~LE_ADVERTISEMENT_TASKS_SET_PARAMS; 5033 hci_stack->le_advertising_set_in_current_command = advertising_set->advertising_handle; 5034 hci_send_cmd(&hci_le_set_extended_advertising_parameters, 5035 advertising_set->advertising_handle, 5036 advertising_set->extended_params.advertising_event_properties, 5037 advertising_set->extended_params.primary_advertising_interval_min, 5038 advertising_set->extended_params.primary_advertising_interval_max, 5039 advertising_set->extended_params.primary_advertising_channel_map, 5040 advertising_set->extended_params.own_address_type, 5041 advertising_set->extended_params.peer_address_type, 5042 advertising_set->extended_params.peer_address, 5043 advertising_set->extended_params.advertising_filter_policy, 5044 advertising_set->extended_params.advertising_tx_power, 5045 advertising_set->extended_params.primary_advertising_phy, 5046 advertising_set->extended_params.secondary_advertising_max_skip, 5047 advertising_set->extended_params.secondary_advertising_phy, 5048 advertising_set->extended_params.advertising_sid, 5049 advertising_set->extended_params.scan_request_notification_enable 5050 ); 5051 return true; 5052 } 5053 if ((advertising_set->tasks & LE_ADVERTISEMENT_TASKS_SET_ADV_DATA) != 0) { 5054 uint16_t pos = advertising_set->adv_data_pos; 5055 uint8_t operation = hci_le_extended_advertising_operation_for_chunk(pos, advertising_set->adv_data_len); 5056 uint16_t data_to_upload = btstack_min(advertising_set->adv_data_len - pos, LE_EXTENDED_ADVERTISING_MAX_CHUNK_LEN); 5057 if ((operation & 0x02) != 0){ 5058 // last fragment or complete data 5059 operation |= 2; 5060 advertising_set->adv_data_pos = 0; 5061 advertising_set->tasks &= ~LE_ADVERTISEMENT_TASKS_SET_ADV_DATA; 5062 } else { 5063 advertising_set->adv_data_pos += data_to_upload; 5064 } 5065 hci_stack->le_advertising_set_in_current_command = advertising_set->advertising_handle; 5066 hci_send_cmd(&hci_le_set_extended_advertising_data, advertising_set->advertising_handle, operation, 0x01, data_to_upload, &advertising_set->adv_data[pos]); 5067 return true; 5068 } 5069 if ((advertising_set->tasks & LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA) != 0) { 5070 uint16_t pos = advertising_set->scan_data_pos; 5071 uint8_t operation = hci_le_extended_advertising_operation_for_chunk(pos, advertising_set->scan_data_len); 5072 uint16_t data_to_upload = btstack_min(advertising_set->scan_data_len - pos, LE_EXTENDED_ADVERTISING_MAX_CHUNK_LEN); 5073 if ((operation & 0x02) != 0){ 5074 advertising_set->scan_data_pos = 0; 5075 advertising_set->tasks &= ~LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA; 5076 } else { 5077 advertising_set->scan_data_pos += data_to_upload; 5078 } 5079 hci_stack->le_advertising_set_in_current_command = advertising_set->advertising_handle; 5080 hci_send_cmd(&hci_le_set_extended_scan_response_data, operation, 0x03, 0x01, data_to_upload, &advertising_set->scan_data[pos]); 5081 return true; 5082 } 5083 if ((advertising_set->tasks & LE_ADVERTISEMENT_TASKS_SET_PERIODIC_PARAMS) != 0){ 5084 advertising_set->tasks &= ~LE_ADVERTISEMENT_TASKS_SET_PERIODIC_PARAMS; 5085 hci_stack->le_advertising_set_in_current_command = advertising_set->advertising_handle; 5086 hci_send_cmd(&hci_le_set_periodic_advertising_parameters, 5087 advertising_set->advertising_handle, 5088 advertising_set->periodic_params.periodic_advertising_interval_min, 5089 advertising_set->periodic_params.periodic_advertising_interval_max, 5090 advertising_set->periodic_params.periodic_advertising_properties); 5091 return true; 5092 } 5093 if ((advertising_set->tasks & LE_ADVERTISEMENT_TASKS_SET_PERIODIC_DATA) != 0) { 5094 uint16_t pos = advertising_set->periodic_data_pos; 5095 uint8_t operation = hci_le_extended_advertising_operation_for_chunk(pos, advertising_set->periodic_data_len); 5096 uint16_t data_to_upload = btstack_min(advertising_set->periodic_data_len - pos, LE_EXTENDED_ADVERTISING_MAX_CHUNK_LEN); 5097 if ((operation & 0x02) != 0){ 5098 // last fragment or complete data 5099 operation |= 2; 5100 advertising_set->periodic_data_pos = 0; 5101 advertising_set->tasks &= ~LE_ADVERTISEMENT_TASKS_SET_PERIODIC_DATA; 5102 } else { 5103 advertising_set->periodic_data_pos += data_to_upload; 5104 } 5105 hci_stack->le_advertising_set_in_current_command = advertising_set->advertising_handle; 5106 hci_send_cmd(&hci_le_set_periodic_advertising_data, advertising_set->advertising_handle, operation, data_to_upload, &advertising_set->periodic_data[pos]); 5107 return true; 5108 } 5109 } 5110 } 5111 #endif 5112 5113 5114 #endif 5115 5116 5117 #ifdef ENABLE_LE_CENTRAL 5118 // if connect with whitelist was active and is not cancelled yet, wait until next time 5119 if (hci_stack->le_connecting_state == LE_CONNECTING_CANCEL) return false; 5120 #endif 5121 5122 // LE Whitelist Management 5123 if (whitelist_modification_pending){ 5124 // add/remove entries 5125 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 5126 while (btstack_linked_list_iterator_has_next(&lit)){ 5127 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&lit); 5128 if (entry->state & LE_WHITELIST_REMOVE_FROM_CONTROLLER){ 5129 entry->state &= ~LE_WHITELIST_REMOVE_FROM_CONTROLLER; 5130 hci_send_cmd(&hci_le_remove_device_from_white_list, entry->address_type, entry->address); 5131 return true; 5132 } 5133 if (entry->state & LE_WHITELIST_ADD_TO_CONTROLLER){ 5134 entry->state &= ~LE_WHITELIST_ADD_TO_CONTROLLER; 5135 entry->state |= LE_WHITELIST_ON_CONTROLLER; 5136 hci_send_cmd(&hci_le_add_device_to_white_list, entry->address_type, entry->address); 5137 return true; 5138 } 5139 if ((entry->state & LE_WHITELIST_ON_CONTROLLER) == 0){ 5140 btstack_linked_list_remove(&hci_stack->le_whitelist, (btstack_linked_item_t *) entry); 5141 btstack_memory_whitelist_entry_free(entry); 5142 } 5143 } 5144 } 5145 5146 #ifdef ENABLE_LE_PRIVACY_ADDRESS_RESOLUTION 5147 // LE Resolving List Management 5148 if (resolving_list_supported) { 5149 uint16_t i; 5150 switch (hci_stack->le_resolving_list_state) { 5151 case LE_RESOLVING_LIST_SEND_ENABLE_ADDRESS_RESOLUTION: 5152 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_READ_SIZE; 5153 hci_send_cmd(&hci_le_set_address_resolution_enabled, 1); 5154 return true; 5155 case LE_RESOLVING_LIST_READ_SIZE: 5156 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_SEND_CLEAR; 5157 hci_send_cmd(&hci_le_read_resolving_list_size); 5158 return true; 5159 case LE_RESOLVING_LIST_SEND_CLEAR: 5160 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_REMOVE_ENTRIES; 5161 (void) memset(hci_stack->le_resolving_list_add_entries, 0xff, 5162 sizeof(hci_stack->le_resolving_list_add_entries)); 5163 (void) memset(hci_stack->le_resolving_list_remove_entries, 0, 5164 sizeof(hci_stack->le_resolving_list_remove_entries)); 5165 hci_send_cmd(&hci_le_clear_resolving_list); 5166 return true; 5167 case LE_RESOLVING_LIST_REMOVE_ENTRIES: 5168 for (i = 0; i < MAX_NUM_RESOLVING_LIST_ENTRIES && i < le_device_db_max_count(); i++) { 5169 uint8_t offset = i >> 3; 5170 uint8_t mask = 1 << (i & 7); 5171 if ((hci_stack->le_resolving_list_remove_entries[offset] & mask) == 0) continue; 5172 hci_stack->le_resolving_list_remove_entries[offset] &= ~mask; 5173 bd_addr_t peer_identity_addreses; 5174 int peer_identity_addr_type = (int) BD_ADDR_TYPE_UNKNOWN; 5175 sm_key_t peer_irk; 5176 le_device_db_info(i, &peer_identity_addr_type, peer_identity_addreses, peer_irk); 5177 if (peer_identity_addr_type == BD_ADDR_TYPE_UNKNOWN) continue; 5178 5179 #ifdef ENABLE_LE_WHITELIST_TOUCH_AFTER_RESOLVING_LIST_UPDATE 5180 // trigger whitelist entry 'update' (work around for controller bug) 5181 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 5182 while (btstack_linked_list_iterator_has_next(&lit)) { 5183 whitelist_entry_t *entry = (whitelist_entry_t *) btstack_linked_list_iterator_next(&lit); 5184 if (entry->address_type != peer_identity_addr_type) continue; 5185 if (memcmp(entry->address, peer_identity_addreses, 6) != 0) continue; 5186 log_info("trigger whitelist update %s", bd_addr_to_str(peer_identity_addreses)); 5187 entry->state |= LE_WHITELIST_REMOVE_FROM_CONTROLLER | LE_WHITELIST_ADD_TO_CONTROLLER; 5188 } 5189 #endif 5190 5191 hci_send_cmd(&hci_le_remove_device_from_resolving_list, peer_identity_addr_type, 5192 peer_identity_addreses); 5193 return true; 5194 } 5195 5196 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_ADD_ENTRIES; 5197 5198 /* fall through */ 5199 5200 case LE_RESOLVING_LIST_ADD_ENTRIES: 5201 for (i = 0; i < MAX_NUM_RESOLVING_LIST_ENTRIES && i < le_device_db_max_count(); i++) { 5202 uint8_t offset = i >> 3; 5203 uint8_t mask = 1 << (i & 7); 5204 if ((hci_stack->le_resolving_list_add_entries[offset] & mask) == 0) continue; 5205 hci_stack->le_resolving_list_add_entries[offset] &= ~mask; 5206 bd_addr_t peer_identity_addreses; 5207 int peer_identity_addr_type = (int) BD_ADDR_TYPE_UNKNOWN; 5208 sm_key_t peer_irk; 5209 le_device_db_info(i, &peer_identity_addr_type, peer_identity_addreses, peer_irk); 5210 if (peer_identity_addr_type == BD_ADDR_TYPE_UNKNOWN) continue; 5211 const uint8_t *local_irk = gap_get_persistent_irk(); 5212 // command uses format specifier 'P' that stores 16-byte value without flip 5213 uint8_t local_irk_flipped[16]; 5214 uint8_t peer_irk_flipped[16]; 5215 reverse_128(local_irk, local_irk_flipped); 5216 reverse_128(peer_irk, peer_irk_flipped); 5217 hci_send_cmd(&hci_le_add_device_to_resolving_list, peer_identity_addr_type, peer_identity_addreses, 5218 peer_irk_flipped, local_irk_flipped); 5219 return true; 5220 } 5221 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_DONE; 5222 break; 5223 5224 default: 5225 break; 5226 } 5227 } 5228 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_DONE; 5229 #endif 5230 5231 // post-pone all actions until stack is fully working 5232 if (hci_stack->state != HCI_STATE_WORKING) return false; 5233 5234 // advertisements, active scanning, and creating connections requires random address to be set if using private address 5235 if ( (hci_stack->le_own_addr_type != BD_ADDR_TYPE_LE_PUBLIC) && (hci_stack->le_random_address_set == 0u) ) return false; 5236 5237 // Phase 4: restore state 5238 5239 #ifdef ENABLE_LE_CENTRAL 5240 // re-start scanning 5241 if ((hci_stack->le_scanning_enabled && !hci_stack->le_scanning_active)){ 5242 hci_stack->le_scanning_active = true; 5243 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 5244 if (hci_extended_advertising_supported()){ 5245 hci_send_cmd(&hci_le_set_extended_scan_enable, 1, 0, 0, 0); 5246 } else 5247 #endif 5248 { 5249 hci_send_cmd(&hci_le_set_scan_enable, 1, 0); 5250 } 5251 return true; 5252 } 5253 #endif 5254 5255 #ifdef ENABLE_LE_CENTRAL 5256 // re-start connecting 5257 if ( (hci_stack->le_connecting_state == LE_CONNECTING_IDLE) && (hci_stack->le_connecting_request == LE_CONNECTING_WHITELIST)){ 5258 bd_addr_t null_addr; 5259 memset(null_addr, 0, 6); 5260 hci_stack->le_connection_own_addr_type = hci_stack->le_own_addr_type; 5261 hci_get_own_address_for_addr_type(hci_stack->le_connection_own_addr_type, hci_stack->le_connection_own_address); 5262 hci_send_cmd(&hci_le_create_connection, 5263 hci_stack->le_connection_scan_interval, // scan interval: 60 ms 5264 hci_stack->le_connection_scan_window, // scan interval: 30 ms 5265 1, // use whitelist 5266 0, // peer address type 5267 null_addr, // peer bd addr 5268 hci_stack->le_connection_own_addr_type, // our addr type: 5269 hci_stack->le_connection_interval_min, // conn interval min 5270 hci_stack->le_connection_interval_max, // conn interval max 5271 hci_stack->le_connection_latency, // conn latency 5272 hci_stack->le_supervision_timeout, // conn latency 5273 hci_stack->le_minimum_ce_length, // min ce length 5274 hci_stack->le_maximum_ce_length // max ce length 5275 ); 5276 return true; 5277 } 5278 #endif 5279 5280 #ifdef ENABLE_LE_PERIPHERAL 5281 // re-start advertising 5282 if (hci_stack->le_advertisements_enabled_for_current_roles && ((hci_stack->le_advertisements_state & LE_ADVERTISEMENT_STATE_ACTIVE) == 0)){ 5283 // check if advertisements should be enabled given 5284 hci_stack->le_advertisements_state |= LE_ADVERTISEMENT_STATE_ACTIVE; 5285 hci_get_own_address_for_addr_type(hci_stack->le_advertisements_own_addr_type, hci_stack->le_advertisements_own_address); 5286 5287 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 5288 if (hci_extended_advertising_supported()){ 5289 const uint8_t advertising_handles[] = { 0 }; 5290 const uint16_t durations[] = { 0 }; 5291 const uint16_t max_events[] = { 0 }; 5292 hci_send_cmd(&hci_le_set_extended_advertising_enable, 1, 1, advertising_handles, durations, max_events); 5293 } else 5294 #endif 5295 { 5296 hci_send_cmd(&hci_le_set_advertise_enable, 1); 5297 } 5298 return true; 5299 } 5300 5301 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 5302 if (hci_extended_advertising_supported()) { 5303 btstack_linked_list_iterator_t it; 5304 btstack_linked_list_iterator_init(&it, &hci_stack->le_advertising_sets); 5305 while (btstack_linked_list_iterator_has_next(&it)) { 5306 le_advertising_set_t *advertising_set = (le_advertising_set_t *) btstack_linked_list_iterator_next(&it); 5307 if (((advertising_set->state & LE_ADVERTISEMENT_STATE_ENABLED) != 0) && ((advertising_set->state & LE_ADVERTISEMENT_STATE_ACTIVE) == 0)){ 5308 advertising_set->state |= LE_ADVERTISEMENT_STATE_ACTIVE; 5309 const uint8_t advertising_handles[] = { advertising_set->advertising_handle }; 5310 const uint16_t durations[] = { advertising_set->enable_timeout }; 5311 const uint16_t max_events[] = { advertising_set->enable_max_scan_events }; 5312 hci_send_cmd(&hci_le_set_extended_advertising_enable, 1, 1, advertising_handles, durations, max_events); 5313 return true; 5314 } 5315 if (((advertising_set->state & LE_ADVERTISEMENT_STATE_PERIODIC_ENABLED) != 0) && ((advertising_set->state & LE_ADVERTISEMENT_STATE_PERIODIC_ACTIVE) == 0)){ 5316 advertising_set->state |= LE_ADVERTISEMENT_STATE_PERIODIC_ACTIVE; 5317 uint8_t enable = 1; 5318 if (advertising_set->periodic_include_adi){ 5319 enable |= 2; 5320 } 5321 hci_send_cmd(&hci_le_set_periodic_advertising_enable, enable, advertising_set->advertising_handle); 5322 return true; 5323 } 5324 } 5325 } 5326 #endif 5327 #endif 5328 5329 return false; 5330 } 5331 #endif 5332 5333 static bool hci_run_general_pending_commands(void){ 5334 btstack_linked_item_t * it; 5335 for (it = (btstack_linked_item_t *) hci_stack->connections; it != NULL; it = it->next){ 5336 hci_connection_t * connection = (hci_connection_t *) it; 5337 5338 switch(connection->state){ 5339 case SEND_CREATE_CONNECTION: 5340 switch(connection->address_type){ 5341 #ifdef ENABLE_CLASSIC 5342 case BD_ADDR_TYPE_ACL: 5343 log_info("sending hci_create_connection"); 5344 hci_send_cmd(&hci_create_connection, connection->address, hci_usable_acl_packet_types(), 0, 0, 0, hci_stack->allow_role_switch); 5345 break; 5346 #endif 5347 default: 5348 #ifdef ENABLE_BLE 5349 #ifdef ENABLE_LE_CENTRAL 5350 log_info("sending hci_le_create_connection"); 5351 hci_stack->le_connection_own_addr_type = hci_stack->le_own_addr_type; 5352 hci_get_own_address_for_addr_type(hci_stack->le_connection_own_addr_type, hci_stack->le_connection_own_address); 5353 hci_send_cmd(&hci_le_create_connection, 5354 hci_stack->le_connection_scan_interval, // conn scan interval 5355 hci_stack->le_connection_scan_window, // conn scan windows 5356 0, // don't use whitelist 5357 connection->address_type, // peer address type 5358 connection->address, // peer bd addr 5359 hci_stack->le_connection_own_addr_type, // our addr type: 5360 hci_stack->le_connection_interval_min, // conn interval min 5361 hci_stack->le_connection_interval_max, // conn interval max 5362 hci_stack->le_connection_latency, // conn latency 5363 hci_stack->le_supervision_timeout, // conn latency 5364 hci_stack->le_minimum_ce_length, // min ce length 5365 hci_stack->le_maximum_ce_length // max ce length 5366 ); 5367 connection->state = SENT_CREATE_CONNECTION; 5368 #endif 5369 #endif 5370 break; 5371 } 5372 return true; 5373 5374 #ifdef ENABLE_CLASSIC 5375 case RECEIVED_CONNECTION_REQUEST: 5376 connection->role = HCI_ROLE_SLAVE; 5377 if (connection->address_type == BD_ADDR_TYPE_ACL){ 5378 log_info("sending hci_accept_connection_request"); 5379 connection->state = ACCEPTED_CONNECTION_REQUEST; 5380 hci_send_cmd(&hci_accept_connection_request, connection->address, hci_stack->master_slave_policy); 5381 return true; 5382 } 5383 break; 5384 #endif 5385 5386 #ifdef ENABLE_BLE 5387 #ifdef ENABLE_LE_CENTRAL 5388 case SEND_CANCEL_CONNECTION: 5389 connection->state = SENT_CANCEL_CONNECTION; 5390 hci_send_cmd(&hci_le_create_connection_cancel); 5391 return true; 5392 #endif 5393 #endif 5394 case SEND_DISCONNECT: 5395 connection->state = SENT_DISCONNECT; 5396 hci_send_cmd(&hci_disconnect, connection->con_handle, ERROR_CODE_REMOTE_USER_TERMINATED_CONNECTION); 5397 return true; 5398 5399 default: 5400 break; 5401 } 5402 5403 // no further commands if connection is about to get shut down 5404 if (connection->state == SENT_DISCONNECT) continue; 5405 5406 if (connection->authentication_flags & AUTH_FLAG_READ_RSSI){ 5407 connectionClearAuthenticationFlags(connection, AUTH_FLAG_READ_RSSI); 5408 hci_send_cmd(&hci_read_rssi, connection->con_handle); 5409 return true; 5410 } 5411 5412 #ifdef ENABLE_CLASSIC 5413 5414 if (connection->authentication_flags & AUTH_FLAG_WRITE_SUPERVISION_TIMEOUT){ 5415 connectionClearAuthenticationFlags(connection, AUTH_FLAG_WRITE_SUPERVISION_TIMEOUT); 5416 hci_send_cmd(&hci_write_link_supervision_timeout, connection->con_handle, hci_stack->link_supervision_timeout); 5417 return true; 5418 } 5419 5420 // Handling link key request requires remote supported features 5421 if (((connection->authentication_flags & AUTH_FLAG_HANDLE_LINK_KEY_REQUEST) != 0)){ 5422 log_info("responding to link key request, have link key db: %u", hci_stack->link_key_db != NULL); 5423 connectionClearAuthenticationFlags(connection, AUTH_FLAG_HANDLE_LINK_KEY_REQUEST); 5424 5425 bool have_link_key = connection->link_key_type != INVALID_LINK_KEY; 5426 bool security_level_sufficient = have_link_key && (gap_security_level_for_link_key_type(connection->link_key_type) >= connection->requested_security_level); 5427 if (have_link_key && security_level_sufficient){ 5428 hci_send_cmd(&hci_link_key_request_reply, connection->address, &connection->link_key); 5429 } else { 5430 hci_send_cmd(&hci_link_key_request_negative_reply, connection->address); 5431 } 5432 return true; 5433 } 5434 5435 if (connection->authentication_flags & AUTH_FLAG_DENY_PIN_CODE_REQUEST){ 5436 log_info("denying to pin request"); 5437 connectionClearAuthenticationFlags(connection, AUTH_FLAG_DENY_PIN_CODE_REQUEST); 5438 hci_send_cmd(&hci_pin_code_request_negative_reply, connection->address); 5439 return true; 5440 } 5441 5442 // security assessment requires remote features 5443 if ((connection->authentication_flags & AUTH_FLAG_RECV_IO_CAPABILITIES_REQUEST) != 0){ 5444 connectionClearAuthenticationFlags(connection, AUTH_FLAG_RECV_IO_CAPABILITIES_REQUEST); 5445 hci_ssp_assess_security_on_io_cap_request(connection); 5446 // no return here as hci_ssp_assess_security_on_io_cap_request only sets AUTH_FLAG_SEND_IO_CAPABILITIES_REPLY or AUTH_FLAG_SEND_IO_CAPABILITIES_NEGATIVE_REPLY 5447 } 5448 5449 if (connection->authentication_flags & AUTH_FLAG_SEND_IO_CAPABILITIES_REPLY){ 5450 connectionClearAuthenticationFlags(connection, AUTH_FLAG_SEND_IO_CAPABILITIES_REPLY); 5451 // set authentication requirements: 5452 // - MITM = ssp_authentication_requirement (USER) | requested_security_level (dynamic) 5453 // - BONDING MODE: dedicated if requested, bondable otherwise. Drop bondable if not set for remote 5454 uint8_t authreq = hci_stack->ssp_authentication_requirement & 1; 5455 if (gap_mitm_protection_required_for_security_level(connection->requested_security_level)){ 5456 authreq |= 1; 5457 } 5458 bool bonding = hci_stack->bondable; 5459 if (connection->authentication_flags & AUTH_FLAG_RECV_IO_CAPABILITIES_RESPONSE){ 5460 // if we have received IO Cap Response, we're in responder role 5461 bool remote_bonding = connection->io_cap_response_auth_req >= SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_DEDICATED_BONDING; 5462 if (bonding && !remote_bonding){ 5463 log_info("Remote not bonding, dropping local flag"); 5464 bonding = false; 5465 } 5466 } 5467 if (bonding){ 5468 if (connection->bonding_flags & BONDING_DEDICATED){ 5469 authreq |= SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_DEDICATED_BONDING; 5470 } else { 5471 authreq |= SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_GENERAL_BONDING; 5472 } 5473 } 5474 uint8_t have_oob_data = 0; 5475 #ifdef ENABLE_CLASSIC_PAIRING_OOB 5476 if (connection->classic_oob_c_192 != NULL){ 5477 have_oob_data |= 1; 5478 } 5479 if (connection->classic_oob_c_256 != NULL){ 5480 have_oob_data |= 2; 5481 } 5482 #endif 5483 hci_send_cmd(&hci_io_capability_request_reply, &connection->address, hci_stack->ssp_io_capability, have_oob_data, authreq); 5484 return true; 5485 } 5486 5487 if (connection->authentication_flags & AUTH_FLAG_SEND_IO_CAPABILITIES_NEGATIVE_REPLY) { 5488 connectionClearAuthenticationFlags(connection, AUTH_FLAG_SEND_IO_CAPABILITIES_NEGATIVE_REPLY); 5489 hci_send_cmd(&hci_io_capability_request_negative_reply, &connection->address, ERROR_CODE_PAIRING_NOT_ALLOWED); 5490 return true; 5491 } 5492 5493 #ifdef ENABLE_CLASSIC_PAIRING_OOB 5494 if (connection->authentication_flags & AUTH_FLAG_SEND_REMOTE_OOB_DATA_REPLY){ 5495 connectionClearAuthenticationFlags(connection, AUTH_FLAG_SEND_REMOTE_OOB_DATA_REPLY); 5496 const uint8_t zero[16] = { 0 }; 5497 const uint8_t * r_192 = zero; 5498 const uint8_t * c_192 = zero; 5499 const uint8_t * r_256 = zero; 5500 const uint8_t * c_256 = zero; 5501 // verify P-256 OOB 5502 if ((connection->classic_oob_c_256 != NULL) && hci_command_supported(SUPPORTED_HCI_COMMAND_REMOTE_OOB_EXTENDED_DATA_REQUEST_REPLY)) { 5503 c_256 = connection->classic_oob_c_256; 5504 if (connection->classic_oob_r_256 != NULL) { 5505 r_256 = connection->classic_oob_r_256; 5506 } 5507 } 5508 // verify P-192 OOB 5509 if ((connection->classic_oob_c_192 != NULL)) { 5510 c_192 = connection->classic_oob_c_192; 5511 if (connection->classic_oob_r_192 != NULL) { 5512 r_192 = connection->classic_oob_r_192; 5513 } 5514 } 5515 5516 // assess security 5517 bool need_level_4 = hci_stack->gap_secure_connections_only_mode || (connection->requested_security_level == LEVEL_4); 5518 bool can_reach_level_4 = hci_remote_sc_enabled(connection) && (c_256 != NULL); 5519 if (need_level_4 && !can_reach_level_4){ 5520 log_info("Level 4 required, but not possible -> abort"); 5521 hci_pairing_complete(connection, ERROR_CODE_INSUFFICIENT_SECURITY); 5522 // send oob negative reply 5523 c_256 = NULL; 5524 c_192 = NULL; 5525 } 5526 5527 // Reply 5528 if (c_256 != zero) { 5529 hci_send_cmd(&hci_remote_oob_extended_data_request_reply, &connection->address, c_192, r_192, c_256, r_256); 5530 } else if (c_192 != zero){ 5531 hci_send_cmd(&hci_remote_oob_data_request_reply, &connection->address, c_192, r_192); 5532 } else { 5533 hci_stack->classic_oob_con_handle = connection->con_handle; 5534 hci_send_cmd(&hci_remote_oob_data_request_negative_reply, &connection->address); 5535 } 5536 return true; 5537 } 5538 #endif 5539 5540 if (connection->authentication_flags & AUTH_FLAG_SEND_USER_CONFIRM_REPLY){ 5541 connectionClearAuthenticationFlags(connection, AUTH_FLAG_SEND_USER_CONFIRM_REPLY); 5542 hci_send_cmd(&hci_user_confirmation_request_reply, &connection->address); 5543 return true; 5544 } 5545 5546 if (connection->authentication_flags & AUTH_FLAG_SEND_USER_CONFIRM_NEGATIVE_REPLY){ 5547 connectionClearAuthenticationFlags(connection, AUTH_FLAG_SEND_USER_CONFIRM_NEGATIVE_REPLY); 5548 hci_send_cmd(&hci_user_confirmation_request_negative_reply, &connection->address); 5549 return true; 5550 } 5551 5552 if (connection->authentication_flags & AUTH_FLAG_SEND_USER_PASSKEY_REPLY){ 5553 connectionClearAuthenticationFlags(connection, AUTH_FLAG_SEND_USER_PASSKEY_REPLY); 5554 hci_send_cmd(&hci_user_passkey_request_reply, &connection->address, 000000); 5555 return true; 5556 } 5557 5558 if (connection->bonding_flags & BONDING_DISCONNECT_DEDICATED_DONE){ 5559 connection->bonding_flags &= ~BONDING_DISCONNECT_DEDICATED_DONE; 5560 connection->bonding_flags |= BONDING_EMIT_COMPLETE_ON_DISCONNECT; 5561 connection->state = SENT_DISCONNECT; 5562 hci_send_cmd(&hci_disconnect, connection->con_handle, ERROR_CODE_REMOTE_USER_TERMINATED_CONNECTION); 5563 return true; 5564 } 5565 5566 if ((connection->bonding_flags & BONDING_SEND_AUTHENTICATE_REQUEST) && ((connection->bonding_flags & BONDING_RECEIVED_REMOTE_FEATURES) != 0)){ 5567 connection->bonding_flags &= ~BONDING_SEND_AUTHENTICATE_REQUEST; 5568 connection->bonding_flags |= BONDING_SENT_AUTHENTICATE_REQUEST; 5569 hci_send_cmd(&hci_authentication_requested, connection->con_handle); 5570 return true; 5571 } 5572 5573 if (connection->bonding_flags & BONDING_SEND_ENCRYPTION_REQUEST){ 5574 connection->bonding_flags &= ~BONDING_SEND_ENCRYPTION_REQUEST; 5575 hci_send_cmd(&hci_set_connection_encryption, connection->con_handle, 1); 5576 return true; 5577 } 5578 5579 if (connection->bonding_flags & BONDING_SEND_READ_ENCRYPTION_KEY_SIZE){ 5580 connection->bonding_flags &= ~BONDING_SEND_READ_ENCRYPTION_KEY_SIZE; 5581 hci_send_cmd(&hci_read_encryption_key_size, connection->con_handle, 1); 5582 return true; 5583 } 5584 5585 if (connection->bonding_flags & BONDING_REQUEST_REMOTE_FEATURES_PAGE_0){ 5586 connection->bonding_flags &= ~BONDING_REQUEST_REMOTE_FEATURES_PAGE_0; 5587 hci_send_cmd(&hci_read_remote_supported_features_command, connection->con_handle); 5588 return true; 5589 } 5590 5591 if (connection->bonding_flags & BONDING_REQUEST_REMOTE_FEATURES_PAGE_1){ 5592 connection->bonding_flags &= ~BONDING_REQUEST_REMOTE_FEATURES_PAGE_1; 5593 hci_send_cmd(&hci_read_remote_extended_features_command, connection->con_handle, 1); 5594 return true; 5595 } 5596 5597 if (connection->bonding_flags & BONDING_REQUEST_REMOTE_FEATURES_PAGE_2){ 5598 connection->bonding_flags &= ~BONDING_REQUEST_REMOTE_FEATURES_PAGE_2; 5599 hci_send_cmd(&hci_read_remote_extended_features_command, connection->con_handle, 2); 5600 return true; 5601 } 5602 #endif 5603 5604 if (connection->bonding_flags & BONDING_DISCONNECT_SECURITY_BLOCK){ 5605 connection->bonding_flags &= ~BONDING_DISCONNECT_SECURITY_BLOCK; 5606 #ifdef ENABLE_CLASSIC 5607 hci_pairing_complete(connection, ERROR_CODE_CONNECTION_REJECTED_DUE_TO_SECURITY_REASONS); 5608 #endif 5609 if (connection->state != SENT_DISCONNECT){ 5610 connection->state = SENT_DISCONNECT; 5611 hci_send_cmd(&hci_disconnect, connection->con_handle, ERROR_CODE_AUTHENTICATION_FAILURE); 5612 return true; 5613 } 5614 } 5615 5616 #ifdef ENABLE_CLASSIC 5617 uint16_t sniff_min_interval; 5618 switch (connection->sniff_min_interval){ 5619 case 0: 5620 break; 5621 case 0xffff: 5622 connection->sniff_min_interval = 0; 5623 hci_send_cmd(&hci_exit_sniff_mode, connection->con_handle); 5624 return true; 5625 default: 5626 sniff_min_interval = connection->sniff_min_interval; 5627 connection->sniff_min_interval = 0; 5628 hci_send_cmd(&hci_sniff_mode, connection->con_handle, connection->sniff_max_interval, sniff_min_interval, connection->sniff_attempt, connection->sniff_timeout); 5629 return true; 5630 } 5631 5632 if (connection->sniff_subrating_max_latency != 0xffff){ 5633 uint16_t max_latency = connection->sniff_subrating_max_latency; 5634 connection->sniff_subrating_max_latency = 0; 5635 hci_send_cmd(&hci_sniff_subrating, connection->con_handle, max_latency, connection->sniff_subrating_min_remote_timeout, connection->sniff_subrating_min_local_timeout); 5636 return true; 5637 } 5638 5639 if (connection->qos_service_type != HCI_SERVICE_TYPE_INVALID){ 5640 uint8_t service_type = (uint8_t) connection->qos_service_type; 5641 connection->qos_service_type = HCI_SERVICE_TYPE_INVALID; 5642 hci_send_cmd(&hci_qos_setup, connection->con_handle, 0, service_type, connection->qos_token_rate, connection->qos_peak_bandwidth, connection->qos_latency, connection->qos_delay_variation); 5643 return true; 5644 } 5645 5646 if (connection->request_role != HCI_ROLE_INVALID){ 5647 hci_role_t role = connection->request_role; 5648 connection->request_role = HCI_ROLE_INVALID; 5649 hci_send_cmd(&hci_switch_role_command, connection->address, role); 5650 return true; 5651 } 5652 #endif 5653 5654 #ifdef ENABLE_BLE 5655 switch (connection->le_con_parameter_update_state){ 5656 // response to L2CAP CON PARAMETER UPDATE REQUEST 5657 case CON_PARAMETER_UPDATE_CHANGE_HCI_CON_PARAMETERS: 5658 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NONE; 5659 hci_send_cmd(&hci_le_connection_update, connection->con_handle, connection->le_conn_interval_min, 5660 connection->le_conn_interval_max, connection->le_conn_latency, connection->le_supervision_timeout, 5661 0x0000, 0xffff); 5662 return true; 5663 case CON_PARAMETER_UPDATE_REPLY: 5664 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NONE; 5665 hci_send_cmd(&hci_le_remote_connection_parameter_request_reply, connection->con_handle, connection->le_conn_interval_min, 5666 connection->le_conn_interval_max, connection->le_conn_latency, connection->le_supervision_timeout, 5667 0x0000, 0xffff); 5668 return true; 5669 case CON_PARAMETER_UPDATE_NEGATIVE_REPLY: 5670 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NONE; 5671 hci_send_cmd(&hci_le_remote_connection_parameter_request_negative_reply, ERROR_CODE_UNSUPPORTED_LMP_PARAMETER_VALUE_UNSUPPORTED_LL_PARAMETER_VALUE); 5672 return true; 5673 default: 5674 break; 5675 } 5676 if (connection->le_phy_update_all_phys != 0xffu){ 5677 uint8_t all_phys = connection->le_phy_update_all_phys; 5678 connection->le_phy_update_all_phys = 0xff; 5679 hci_send_cmd(&hci_le_set_phy, connection->con_handle, all_phys, connection->le_phy_update_tx_phys, connection->le_phy_update_rx_phys, connection->le_phy_update_phy_options); 5680 return true; 5681 } 5682 #endif 5683 } 5684 return false; 5685 } 5686 5687 static void hci_run(void){ 5688 5689 // stack state sub statemachines 5690 // halting needs to be called even if we cannot send command packet now 5691 switch (hci_stack->state) { 5692 case HCI_STATE_INITIALIZING: 5693 hci_initializing_run(); 5694 break; 5695 case HCI_STATE_HALTING: 5696 hci_halting_run(); 5697 break; 5698 case HCI_STATE_FALLING_ASLEEP: 5699 hci_falling_asleep_run(); 5700 break; 5701 default: 5702 break; 5703 } 5704 5705 bool done; 5706 5707 // send continuation fragments first, as they block the prepared packet buffer 5708 done = hci_run_acl_fragments(); 5709 if (done) return; 5710 5711 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 5712 // send host num completed packets next as they don't require num_cmd_packets > 0 5713 if (!hci_can_send_comand_packet_transport()) return; 5714 if (hci_stack->host_completed_packets){ 5715 hci_host_num_completed_packets(); 5716 return; 5717 } 5718 #endif 5719 5720 if (!hci_can_send_command_packet_now()) return; 5721 5722 // global/non-connection oriented commands 5723 5724 5725 #ifdef ENABLE_CLASSIC 5726 // general gap classic 5727 done = hci_run_general_gap_classic(); 5728 if (done) return; 5729 #endif 5730 5731 #ifdef ENABLE_BLE 5732 // general gap le 5733 done = hci_run_general_gap_le(); 5734 if (done) return; 5735 #endif 5736 5737 // send pending HCI commands 5738 hci_run_general_pending_commands(); 5739 } 5740 5741 uint8_t hci_send_cmd_packet(uint8_t *packet, int size){ 5742 // house-keeping 5743 5744 #ifdef ENABLE_CLASSIC 5745 bd_addr_t addr; 5746 hci_connection_t * conn; 5747 #endif 5748 #ifdef ENABLE_LE_CENTRAL 5749 uint8_t initiator_filter_policy; 5750 #endif 5751 5752 uint16_t opcode = little_endian_read_16(packet, 0); 5753 switch (opcode) { 5754 case HCI_OPCODE_HCI_WRITE_LOOPBACK_MODE: 5755 hci_stack->loopback_mode = packet[3]; 5756 break; 5757 5758 #ifdef ENABLE_CLASSIC 5759 case HCI_OPCODE_HCI_CREATE_CONNECTION: 5760 reverse_bd_addr(&packet[3], addr); 5761 log_info("Create_connection to %s", bd_addr_to_str(addr)); 5762 5763 // CVE-2020-26555: reject outgoing connection to device with same BD ADDR 5764 if (memcmp(hci_stack->local_bd_addr, addr, 6) == 0) { 5765 hci_emit_connection_complete(addr, 0, ERROR_CODE_CONNECTION_REJECTED_DUE_TO_UNACCEPTABLE_BD_ADDR); 5766 return ERROR_CODE_CONNECTION_REJECTED_DUE_TO_UNACCEPTABLE_BD_ADDR; 5767 } 5768 5769 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 5770 if (!conn) { 5771 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 5772 if (!conn) { 5773 // notify client that alloc failed 5774 hci_emit_connection_complete(addr, 0, BTSTACK_MEMORY_ALLOC_FAILED); 5775 return BTSTACK_MEMORY_ALLOC_FAILED; // packet not sent to controller 5776 } 5777 conn->state = SEND_CREATE_CONNECTION; 5778 conn->role = HCI_ROLE_MASTER; 5779 } 5780 5781 conn->con_handle = HCI_CON_HANDLE_INVALID; 5782 conn->role = HCI_ROLE_INVALID; 5783 5784 log_info("conn state %u", conn->state); 5785 // TODO: L2CAP should not send create connection command, instead a (new) gap function should be used 5786 switch (conn->state) { 5787 // if connection active exists 5788 case OPEN: 5789 // and OPEN, emit connection complete command 5790 hci_emit_connection_complete(addr, conn->con_handle, ERROR_CODE_SUCCESS); 5791 // packet not sent to controller 5792 return ERROR_CODE_ACL_CONNECTION_ALREADY_EXISTS; 5793 case RECEIVED_DISCONNECTION_COMPLETE: 5794 // create connection triggered in disconnect complete event, let's do it now 5795 break; 5796 case SEND_CREATE_CONNECTION: 5797 #ifdef ENABLE_HCI_SERIALIZED_CONTROLLER_OPERATIONS 5798 if (hci_classic_operation_active()){ 5799 return ERROR_CODE_SUCCESS; 5800 } 5801 #endif 5802 // connection created by hci, e.g. dedicated bonding, but not executed yet, let's do it now 5803 break; 5804 default: 5805 // otherwise, just ignore as it is already in the open process 5806 // packet not sent to controller 5807 return ERROR_CODE_ACL_CONNECTION_ALREADY_EXISTS; 5808 } 5809 conn->state = SENT_CREATE_CONNECTION; 5810 5811 // track outgoing connection 5812 hci_stack->outgoing_addr_type = BD_ADDR_TYPE_ACL; 5813 (void) memcpy(hci_stack->outgoing_addr, addr, 6); 5814 break; 5815 5816 #if defined (ENABLE_SCO_OVER_HCI) || defined (HAVE_SCO_TRANSPORT) 5817 case HCI_OPCODE_HCI_SETUP_SYNCHRONOUS_CONNECTION: 5818 // setup_synchronous_connection? Voice setting at offset 22 5819 // TODO: compare to current setting if sco connection already active 5820 hci_stack->sco_voice_setting_active = little_endian_read_16(packet, 15); 5821 break; 5822 case HCI_OPCODE_HCI_ACCEPT_SYNCHRONOUS_CONNECTION: 5823 // accept_synchronous_connection? Voice setting at offset 18 5824 // TODO: compare to current setting if sco connection already active 5825 hci_stack->sco_voice_setting_active = little_endian_read_16(packet, 19); 5826 // track outgoing connection 5827 hci_stack->outgoing_addr_type = BD_ADDR_TYPE_SCO; 5828 reverse_bd_addr(&packet[3], hci_stack->outgoing_addr); 5829 break; 5830 #endif 5831 #endif 5832 5833 #ifdef ENABLE_BLE 5834 #ifdef ENABLE_LE_CENTRAL 5835 case HCI_OPCODE_HCI_LE_CREATE_CONNECTION: 5836 // white list used? 5837 initiator_filter_policy = packet[7]; 5838 switch (initiator_filter_policy) { 5839 case 0: 5840 // whitelist not used 5841 hci_stack->le_connecting_state = LE_CONNECTING_DIRECT; 5842 break; 5843 case 1: 5844 hci_stack->le_connecting_state = LE_CONNECTING_WHITELIST; 5845 break; 5846 default: 5847 log_error("Invalid initiator_filter_policy in LE Create Connection %u", initiator_filter_policy); 5848 break; 5849 } 5850 // track outgoing connection 5851 hci_stack->outgoing_addr_type = (bd_addr_type_t) packet[8]; // peer addres type 5852 reverse_bd_addr( &packet[9], hci_stack->outgoing_addr); // peer address 5853 break; 5854 case HCI_OPCODE_HCI_LE_CREATE_CONNECTION_CANCEL: 5855 hci_stack->le_connecting_state = LE_CONNECTING_CANCEL; 5856 break; 5857 #endif 5858 #endif 5859 default: 5860 break; 5861 } 5862 5863 hci_stack->num_cmd_packets--; 5864 5865 hci_dump_packet(HCI_COMMAND_DATA_PACKET, 0, packet, size); 5866 int err = hci_stack->hci_transport->send_packet(HCI_COMMAND_DATA_PACKET, packet, size); 5867 if (err != 0){ 5868 return ERROR_CODE_HARDWARE_FAILURE; 5869 } 5870 return ERROR_CODE_SUCCESS; 5871 } 5872 5873 // disconnect because of security block 5874 void hci_disconnect_security_block(hci_con_handle_t con_handle){ 5875 hci_connection_t * connection = hci_connection_for_handle(con_handle); 5876 if (!connection) return; 5877 connection->bonding_flags |= BONDING_DISCONNECT_SECURITY_BLOCK; 5878 } 5879 5880 5881 // Configure Secure Simple Pairing 5882 5883 #ifdef ENABLE_CLASSIC 5884 5885 // enable will enable SSP during init 5886 void gap_ssp_set_enable(int enable){ 5887 hci_stack->ssp_enable = enable; 5888 } 5889 5890 static int hci_local_ssp_activated(void){ 5891 return gap_ssp_supported() && hci_stack->ssp_enable; 5892 } 5893 5894 // if set, BTstack will respond to io capability request using authentication requirement 5895 void gap_ssp_set_io_capability(int io_capability){ 5896 hci_stack->ssp_io_capability = io_capability; 5897 } 5898 void gap_ssp_set_authentication_requirement(int authentication_requirement){ 5899 hci_stack->ssp_authentication_requirement = authentication_requirement; 5900 } 5901 5902 // if set, BTstack will confirm a numberic comparion and enter '000000' if requested 5903 void gap_ssp_set_auto_accept(int auto_accept){ 5904 hci_stack->ssp_auto_accept = auto_accept; 5905 } 5906 5907 void gap_secure_connections_enable(bool enable){ 5908 hci_stack->secure_connections_enable = enable; 5909 } 5910 5911 #endif 5912 5913 // va_list part of hci_send_cmd 5914 uint8_t hci_send_cmd_va_arg(const hci_cmd_t * cmd, va_list argptr){ 5915 if (!hci_can_send_command_packet_now()){ 5916 log_error("hci_send_cmd called but cannot send packet now"); 5917 return ERROR_CODE_COMMAND_DISALLOWED; 5918 } 5919 5920 // for HCI INITIALIZATION 5921 // log_info("hci_send_cmd: opcode %04x", cmd->opcode); 5922 hci_stack->last_cmd_opcode = cmd->opcode; 5923 5924 hci_reserve_packet_buffer(); 5925 uint8_t * packet = hci_stack->hci_packet_buffer; 5926 uint16_t size = hci_cmd_create_from_template(packet, cmd, argptr); 5927 uint8_t status = hci_send_cmd_packet(packet, size); 5928 5929 // release packet buffer on error or for synchronous transport implementations 5930 if ((status != ERROR_CODE_SUCCESS) || hci_transport_synchronous()){ 5931 hci_release_packet_buffer(); 5932 hci_emit_transport_packet_sent(); 5933 } 5934 5935 return status; 5936 } 5937 5938 /** 5939 * pre: numcmds >= 0 - it's allowed to send a command to the controller 5940 */ 5941 uint8_t hci_send_cmd(const hci_cmd_t * cmd, ...){ 5942 va_list argptr; 5943 va_start(argptr, cmd); 5944 uint8_t status = hci_send_cmd_va_arg(cmd, argptr); 5945 va_end(argptr); 5946 return status; 5947 } 5948 5949 // Create various non-HCI events. 5950 // TODO: generalize, use table similar to hci_create_command 5951 5952 static void hci_emit_event(uint8_t * event, uint16_t size, int dump){ 5953 // dump packet 5954 if (dump) { 5955 hci_dump_packet( HCI_EVENT_PACKET, 0, event, size); 5956 } 5957 5958 // dispatch to all event handlers 5959 btstack_linked_list_iterator_t it; 5960 btstack_linked_list_iterator_init(&it, &hci_stack->event_handlers); 5961 while (btstack_linked_list_iterator_has_next(&it)){ 5962 btstack_packet_callback_registration_t * entry = (btstack_packet_callback_registration_t*) btstack_linked_list_iterator_next(&it); 5963 entry->callback(HCI_EVENT_PACKET, 0, event, size); 5964 } 5965 } 5966 5967 static void hci_emit_acl_packet(uint8_t * packet, uint16_t size){ 5968 if (!hci_stack->acl_packet_handler) return; 5969 hci_stack->acl_packet_handler(HCI_ACL_DATA_PACKET, 0, packet, size); 5970 } 5971 5972 #ifdef ENABLE_CLASSIC 5973 static void hci_notify_if_sco_can_send_now(void){ 5974 // notify SCO sender if waiting 5975 if (!hci_stack->sco_waiting_for_can_send_now) return; 5976 if (hci_can_send_sco_packet_now()){ 5977 hci_stack->sco_waiting_for_can_send_now = 0; 5978 uint8_t event[2] = { HCI_EVENT_SCO_CAN_SEND_NOW, 0 }; 5979 hci_dump_packet(HCI_EVENT_PACKET, 1, event, sizeof(event)); 5980 hci_stack->sco_packet_handler(HCI_EVENT_PACKET, 0, event, sizeof(event)); 5981 } 5982 } 5983 5984 // parsing end emitting has been merged to reduce code size 5985 static void gap_inquiry_explode(uint8_t *packet, uint16_t size) { 5986 uint8_t event[28+GAP_INQUIRY_MAX_NAME_LEN]; 5987 5988 uint8_t * eir_data; 5989 ad_context_t context; 5990 const uint8_t * name; 5991 uint8_t name_len; 5992 5993 if (size < 3) return; 5994 5995 int event_type = hci_event_packet_get_type(packet); 5996 int num_reserved_fields = (event_type == HCI_EVENT_INQUIRY_RESULT) ? 2 : 1; // 2 for old event, 1 otherwise 5997 int num_responses = hci_event_inquiry_result_get_num_responses(packet); 5998 5999 switch (event_type){ 6000 case HCI_EVENT_INQUIRY_RESULT: 6001 case HCI_EVENT_INQUIRY_RESULT_WITH_RSSI: 6002 if (size != (3 + (num_responses * 14))) return; 6003 break; 6004 case HCI_EVENT_EXTENDED_INQUIRY_RESPONSE: 6005 if (size != 257) return; 6006 if (num_responses != 1) return; 6007 break; 6008 default: 6009 return; 6010 } 6011 6012 // event[1] is set at the end 6013 int i; 6014 for (i=0; i<num_responses;i++){ 6015 memset(event, 0, sizeof(event)); 6016 event[0] = GAP_EVENT_INQUIRY_RESULT; 6017 uint8_t event_size = 27; // if name is not set by EIR 6018 6019 (void)memcpy(&event[2], &packet[3 + (i * 6)], 6); // bd_addr 6020 event[8] = packet[3 + (num_responses*(6)) + (i*1)]; // page_scan_repetition_mode 6021 (void)memcpy(&event[9], 6022 &packet[3 + (num_responses * (6 + 1 + num_reserved_fields)) + (i * 3)], 6023 3); // class of device 6024 (void)memcpy(&event[12], 6025 &packet[3 + (num_responses * (6 + 1 + num_reserved_fields + 3)) + (i * 2)], 6026 2); // clock offset 6027 6028 switch (event_type){ 6029 case HCI_EVENT_INQUIRY_RESULT: 6030 // 14,15,16,17 = 0, size 18 6031 break; 6032 case HCI_EVENT_INQUIRY_RESULT_WITH_RSSI: 6033 event[14] = 1; 6034 event[15] = packet [3 + (num_responses*(6+1+num_reserved_fields+3+2)) + (i*1)]; // rssi 6035 // 16,17 = 0, size 18 6036 break; 6037 case HCI_EVENT_EXTENDED_INQUIRY_RESPONSE: 6038 event[14] = 1; 6039 event[15] = packet [3 + (num_responses*(6+1+num_reserved_fields+3+2)) + (i*1)]; // rssi 6040 // EIR packets only contain a single inquiry response 6041 eir_data = &packet[3 + (6+1+num_reserved_fields+3+2+1)]; 6042 name = NULL; 6043 // Iterate over EIR data 6044 for (ad_iterator_init(&context, EXTENDED_INQUIRY_RESPONSE_DATA_LEN, eir_data) ; ad_iterator_has_more(&context) ; ad_iterator_next(&context)){ 6045 uint8_t data_type = ad_iterator_get_data_type(&context); 6046 uint8_t data_size = ad_iterator_get_data_len(&context); 6047 const uint8_t * data = ad_iterator_get_data(&context); 6048 // Prefer Complete Local Name over Shortened Local Name 6049 switch (data_type){ 6050 case BLUETOOTH_DATA_TYPE_SHORTENED_LOCAL_NAME: 6051 if (name) continue; 6052 /* fall through */ 6053 case BLUETOOTH_DATA_TYPE_COMPLETE_LOCAL_NAME: 6054 name = data; 6055 name_len = data_size; 6056 break; 6057 case BLUETOOTH_DATA_TYPE_DEVICE_ID: 6058 if (data_size != 8) break; 6059 event[16] = 1; 6060 memcpy(&event[17], data, 8); 6061 break; 6062 default: 6063 break; 6064 } 6065 } 6066 if (name){ 6067 event[25] = 1; 6068 // truncate name if needed 6069 int len = btstack_min(name_len, GAP_INQUIRY_MAX_NAME_LEN); 6070 event[26] = len; 6071 (void)memcpy(&event[27], name, len); 6072 event_size += len; 6073 } 6074 break; 6075 default: 6076 return; 6077 } 6078 event[1] = event_size - 2; 6079 hci_emit_event(event, event_size, 1); 6080 } 6081 } 6082 #endif 6083 6084 void hci_emit_state(void){ 6085 log_info("BTSTACK_EVENT_STATE %u", hci_stack->state); 6086 uint8_t event[3]; 6087 event[0] = BTSTACK_EVENT_STATE; 6088 event[1] = sizeof(event) - 2u; 6089 event[2] = hci_stack->state; 6090 hci_emit_event(event, sizeof(event), 1); 6091 } 6092 6093 #ifdef ENABLE_CLASSIC 6094 static void hci_emit_connection_complete(bd_addr_t address, hci_con_handle_t con_handle, uint8_t status){ 6095 uint8_t event[13]; 6096 event[0] = HCI_EVENT_CONNECTION_COMPLETE; 6097 event[1] = sizeof(event) - 2; 6098 event[2] = status; 6099 little_endian_store_16(event, 3, con_handle); 6100 reverse_bd_addr(address, &event[5]); 6101 event[11] = 1; // ACL connection 6102 event[12] = 0; // encryption disabled 6103 hci_emit_event(event, sizeof(event), 1); 6104 } 6105 static void hci_emit_l2cap_check_timeout(hci_connection_t *conn){ 6106 if (disable_l2cap_timeouts) return; 6107 log_info("L2CAP_EVENT_TIMEOUT_CHECK"); 6108 uint8_t event[4]; 6109 event[0] = L2CAP_EVENT_TIMEOUT_CHECK; 6110 event[1] = sizeof(event) - 2; 6111 little_endian_store_16(event, 2, conn->con_handle); 6112 hci_emit_event(event, sizeof(event), 1); 6113 } 6114 #endif 6115 6116 #ifdef ENABLE_BLE 6117 #ifdef ENABLE_LE_CENTRAL 6118 static void hci_emit_le_connection_complete(uint8_t address_type, const bd_addr_t address, hci_con_handle_t con_handle, uint8_t status){ 6119 uint8_t event[21]; 6120 event[0] = HCI_EVENT_LE_META; 6121 event[1] = sizeof(event) - 2u; 6122 event[2] = HCI_SUBEVENT_LE_CONNECTION_COMPLETE; 6123 event[3] = status; 6124 little_endian_store_16(event, 4, con_handle); 6125 event[6] = 0; // TODO: role 6126 event[7] = address_type; 6127 reverse_bd_addr(address, &event[8]); 6128 little_endian_store_16(event, 14, 0); // interval 6129 little_endian_store_16(event, 16, 0); // latency 6130 little_endian_store_16(event, 18, 0); // supervision timeout 6131 event[20] = 0; // master clock accuracy 6132 hci_emit_event(event, sizeof(event), 1); 6133 } 6134 #endif 6135 #endif 6136 6137 static void hci_emit_transport_packet_sent(void){ 6138 // notify upper stack that it might be possible to send again 6139 uint8_t event[] = { HCI_EVENT_TRANSPORT_PACKET_SENT, 0}; 6140 hci_emit_event(&event[0], sizeof(event), 0); // don't dump 6141 } 6142 6143 static void hci_emit_disconnection_complete(hci_con_handle_t con_handle, uint8_t reason){ 6144 uint8_t event[6]; 6145 event[0] = HCI_EVENT_DISCONNECTION_COMPLETE; 6146 event[1] = sizeof(event) - 2u; 6147 event[2] = 0; // status = OK 6148 little_endian_store_16(event, 3, con_handle); 6149 event[5] = reason; 6150 hci_emit_event(event, sizeof(event), 1); 6151 } 6152 6153 static void hci_emit_nr_connections_changed(void){ 6154 log_info("BTSTACK_EVENT_NR_CONNECTIONS_CHANGED %u", nr_hci_connections()); 6155 uint8_t event[3]; 6156 event[0] = BTSTACK_EVENT_NR_CONNECTIONS_CHANGED; 6157 event[1] = sizeof(event) - 2u; 6158 event[2] = nr_hci_connections(); 6159 hci_emit_event(event, sizeof(event), 1); 6160 } 6161 6162 static void hci_emit_hci_open_failed(void){ 6163 log_info("BTSTACK_EVENT_POWERON_FAILED"); 6164 uint8_t event[2]; 6165 event[0] = BTSTACK_EVENT_POWERON_FAILED; 6166 event[1] = sizeof(event) - 2u; 6167 hci_emit_event(event, sizeof(event), 1); 6168 } 6169 6170 static void hci_emit_dedicated_bonding_result(bd_addr_t address, uint8_t status){ 6171 log_info("hci_emit_dedicated_bonding_result %u ", status); 6172 uint8_t event[9]; 6173 int pos = 0; 6174 event[pos++] = GAP_EVENT_DEDICATED_BONDING_COMPLETED; 6175 event[pos++] = sizeof(event) - 2u; 6176 event[pos++] = status; 6177 reverse_bd_addr(address, &event[pos]); 6178 hci_emit_event(event, sizeof(event), 1); 6179 } 6180 6181 6182 #ifdef ENABLE_CLASSIC 6183 6184 static void hci_emit_security_level(hci_con_handle_t con_handle, gap_security_level_t level){ 6185 log_info("hci_emit_security_level %u for handle %x", level, con_handle); 6186 uint8_t event[5]; 6187 int pos = 0; 6188 event[pos++] = GAP_EVENT_SECURITY_LEVEL; 6189 event[pos++] = sizeof(event) - 2; 6190 little_endian_store_16(event, 2, con_handle); 6191 pos += 2; 6192 event[pos++] = level; 6193 hci_emit_event(event, sizeof(event), 1); 6194 } 6195 6196 static gap_security_level_t gap_security_level_for_connection(hci_connection_t * connection){ 6197 if (!connection) return LEVEL_0; 6198 if ((connection->authentication_flags & AUTH_FLAG_CONNECTION_ENCRYPTED) == 0) return LEVEL_0; 6199 // BIAS: we only consider Authenticated if the connection is already encrypted, which requires that both sides have link key 6200 if ((connection->authentication_flags & AUTH_FLAG_CONNECTION_AUTHENTICATED) == 0) return LEVEL_0; 6201 if (connection->encryption_key_size < hci_stack->gap_required_encyrption_key_size) return LEVEL_0; 6202 gap_security_level_t security_level = gap_security_level_for_link_key_type(connection->link_key_type); 6203 // LEVEL 4 always requires 128 bit encrytion key size 6204 if ((security_level == LEVEL_4) && (connection->encryption_key_size < 16)){ 6205 security_level = LEVEL_3; 6206 } 6207 return security_level; 6208 } 6209 6210 static void hci_emit_discoverable_enabled(uint8_t enabled){ 6211 log_info("BTSTACK_EVENT_DISCOVERABLE_ENABLED %u", enabled); 6212 uint8_t event[3]; 6213 event[0] = BTSTACK_EVENT_DISCOVERABLE_ENABLED; 6214 event[1] = sizeof(event) - 2; 6215 event[2] = enabled; 6216 hci_emit_event(event, sizeof(event), 1); 6217 } 6218 6219 // query if remote side supports eSCO 6220 bool hci_remote_esco_supported(hci_con_handle_t con_handle){ 6221 hci_connection_t * connection = hci_connection_for_handle(con_handle); 6222 if (!connection) return false; 6223 return (connection->remote_supported_features[0] & 1) != 0; 6224 } 6225 6226 static bool hci_ssp_supported(hci_connection_t * connection){ 6227 const uint8_t mask = BONDING_REMOTE_SUPPORTS_SSP_CONTROLLER | BONDING_REMOTE_SUPPORTS_SSP_HOST; 6228 return (connection->bonding_flags & mask) == mask; 6229 } 6230 6231 // query if remote side supports SSP 6232 bool hci_remote_ssp_supported(hci_con_handle_t con_handle){ 6233 hci_connection_t * connection = hci_connection_for_handle(con_handle); 6234 if (!connection) return false; 6235 return hci_ssp_supported(connection) ? 1 : 0; 6236 } 6237 6238 bool gap_ssp_supported_on_both_sides(hci_con_handle_t handle){ 6239 return hci_local_ssp_activated() && hci_remote_ssp_supported(handle); 6240 } 6241 6242 /** 6243 * Check if remote supported features query has completed 6244 */ 6245 bool hci_remote_features_available(hci_con_handle_t handle){ 6246 hci_connection_t * connection = hci_connection_for_handle(handle); 6247 if (!connection) return false; 6248 return (connection->bonding_flags & BONDING_RECEIVED_REMOTE_FEATURES) != 0; 6249 } 6250 6251 /** 6252 * Trigger remote supported features query 6253 */ 6254 6255 static void hci_trigger_remote_features_for_connection(hci_connection_t * connection){ 6256 if ((connection->bonding_flags & (BONDING_REMOTE_FEATURES_QUERY_ACTIVE | BONDING_RECEIVED_REMOTE_FEATURES)) == 0){ 6257 connection->bonding_flags |= BONDING_REMOTE_FEATURES_QUERY_ACTIVE | BONDING_REQUEST_REMOTE_FEATURES_PAGE_0; 6258 } 6259 } 6260 6261 void hci_remote_features_query(hci_con_handle_t con_handle){ 6262 hci_connection_t * connection = hci_connection_for_handle(con_handle); 6263 if (!connection) return; 6264 hci_trigger_remote_features_for_connection(connection); 6265 hci_run(); 6266 } 6267 6268 // GAP API 6269 /** 6270 * @bbrief enable/disable bonding. default is enabled 6271 * @praram enabled 6272 */ 6273 void gap_set_bondable_mode(int enable){ 6274 hci_stack->bondable = enable ? 1 : 0; 6275 } 6276 /** 6277 * @brief Get bondable mode. 6278 * @return 1 if bondable 6279 */ 6280 int gap_get_bondable_mode(void){ 6281 return hci_stack->bondable; 6282 } 6283 6284 /** 6285 * @brief map link keys to security levels 6286 */ 6287 gap_security_level_t gap_security_level_for_link_key_type(link_key_type_t link_key_type){ 6288 switch (link_key_type){ 6289 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P256: 6290 return LEVEL_4; 6291 case COMBINATION_KEY: 6292 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P192: 6293 return LEVEL_3; 6294 default: 6295 return LEVEL_2; 6296 } 6297 } 6298 6299 /** 6300 * @brief map link keys to secure connection yes/no 6301 */ 6302 bool gap_secure_connection_for_link_key_type(link_key_type_t link_key_type){ 6303 switch (link_key_type){ 6304 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P256: 6305 case UNAUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P256: 6306 return true; 6307 default: 6308 return false; 6309 } 6310 } 6311 6312 /** 6313 * @brief map link keys to authenticated 6314 */ 6315 bool gap_authenticated_for_link_key_type(link_key_type_t link_key_type){ 6316 switch (link_key_type){ 6317 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P256: 6318 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P192: 6319 return true; 6320 default: 6321 return false; 6322 } 6323 } 6324 6325 bool gap_mitm_protection_required_for_security_level(gap_security_level_t level){ 6326 log_info("gap_mitm_protection_required_for_security_level %u", level); 6327 return level > LEVEL_2; 6328 } 6329 6330 /** 6331 * @brief get current security level 6332 */ 6333 gap_security_level_t gap_security_level(hci_con_handle_t con_handle){ 6334 hci_connection_t * connection = hci_connection_for_handle(con_handle); 6335 if (!connection) return LEVEL_0; 6336 return gap_security_level_for_connection(connection); 6337 } 6338 6339 /** 6340 * @brief request connection to device to 6341 * @result GAP_AUTHENTICATION_RESULT 6342 */ 6343 void gap_request_security_level(hci_con_handle_t con_handle, gap_security_level_t requested_level){ 6344 hci_connection_t * connection = hci_connection_for_handle(con_handle); 6345 if (!connection){ 6346 hci_emit_security_level(con_handle, LEVEL_0); 6347 return; 6348 } 6349 6350 btstack_assert(hci_is_le_connection(connection) == false); 6351 6352 // Core Spec 5.2, GAP 5.2.2: "When in Secure Connections Only mode, all services (except those allowed to have Security Mode 4, Level 0) 6353 // available on the BR/EDR physical transport require Security Mode 4, Level 4 " 6354 if (hci_stack->gap_secure_connections_only_mode && (requested_level != LEVEL_0)){ 6355 requested_level = LEVEL_4; 6356 } 6357 6358 gap_security_level_t current_level = gap_security_level(con_handle); 6359 log_info("gap_request_security_level requested level %u, planned level %u, current level %u", 6360 requested_level, connection->requested_security_level, current_level); 6361 6362 // authentication active if authentication request was sent or planned level > 0 6363 bool authentication_active = ((connection->bonding_flags & BONDING_SENT_AUTHENTICATE_REQUEST) != 0) || (connection->requested_security_level > LEVEL_0); 6364 if (authentication_active){ 6365 // authentication already active 6366 if (connection->requested_security_level < requested_level){ 6367 // increase requested level as new level is higher 6368 // TODO: handle re-authentication when done 6369 connection->requested_security_level = requested_level; 6370 } 6371 } else { 6372 // no request active, notify if security sufficient 6373 if (requested_level <= current_level){ 6374 hci_emit_security_level(con_handle, current_level); 6375 return; 6376 } 6377 6378 // store request 6379 connection->requested_security_level = requested_level; 6380 6381 // request remote features if not already active 6382 hci_remote_features_query(con_handle); 6383 6384 // start to authenticate connection 6385 connection->bonding_flags |= BONDING_SEND_AUTHENTICATE_REQUEST; 6386 hci_run(); 6387 } 6388 } 6389 6390 /** 6391 * @brief start dedicated bonding with device. disconnect after bonding 6392 * @param device 6393 * @param request MITM protection 6394 * @result GAP_DEDICATED_BONDING_COMPLETE 6395 */ 6396 int gap_dedicated_bonding(bd_addr_t device, int mitm_protection_required){ 6397 6398 // create connection state machine 6399 hci_connection_t * connection = create_connection_for_bd_addr_and_type(device, BD_ADDR_TYPE_ACL); 6400 6401 if (!connection){ 6402 return BTSTACK_MEMORY_ALLOC_FAILED; 6403 } 6404 6405 // delete linkn key 6406 gap_drop_link_key_for_bd_addr(device); 6407 6408 // configure LEVEL_2/3, dedicated bonding 6409 connection->state = SEND_CREATE_CONNECTION; 6410 connection->requested_security_level = mitm_protection_required ? LEVEL_3 : LEVEL_2; 6411 log_info("gap_dedicated_bonding, mitm %d -> level %u", mitm_protection_required, connection->requested_security_level); 6412 connection->bonding_flags = BONDING_DEDICATED; 6413 6414 // wait for GAP Security Result and send GAP Dedicated Bonding complete 6415 6416 // handle: connnection failure (connection complete != ok) 6417 // handle: authentication failure 6418 // handle: disconnect on done 6419 6420 hci_run(); 6421 6422 return 0; 6423 } 6424 6425 void gap_set_local_name(const char * local_name){ 6426 hci_stack->local_name = local_name; 6427 hci_stack->gap_tasks_classic |= GAP_TASK_SET_LOCAL_NAME; 6428 // also update EIR if not set by user 6429 if (hci_stack->eir_data == NULL){ 6430 hci_stack->gap_tasks_classic |= GAP_TASK_SET_EIR_DATA; 6431 } 6432 hci_run(); 6433 } 6434 #endif 6435 6436 6437 #ifdef ENABLE_BLE 6438 6439 #ifdef ENABLE_LE_CENTRAL 6440 void gap_start_scan(void){ 6441 hci_stack->le_scanning_enabled = true; 6442 hci_run(); 6443 } 6444 6445 void gap_stop_scan(void){ 6446 hci_stack->le_scanning_enabled = false; 6447 hci_run(); 6448 } 6449 6450 void gap_set_scan_params(uint8_t scan_type, uint16_t scan_interval, uint16_t scan_window, uint8_t scanning_filter_policy){ 6451 hci_stack->le_scan_type = scan_type; 6452 hci_stack->le_scan_filter_policy = scanning_filter_policy; 6453 hci_stack->le_scan_interval = scan_interval; 6454 hci_stack->le_scan_window = scan_window; 6455 hci_stack->le_scanning_param_update = true; 6456 hci_run(); 6457 } 6458 6459 void gap_set_scan_parameters(uint8_t scan_type, uint16_t scan_interval, uint16_t scan_window){ 6460 gap_set_scan_params(scan_type, scan_interval, scan_window, 0); 6461 } 6462 6463 uint8_t gap_connect(const bd_addr_t addr, bd_addr_type_t addr_type){ 6464 hci_connection_t * conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 6465 if (!conn){ 6466 // disallow if le connection is already outgoing 6467 if (hci_is_le_connection_type(addr_type) && hci_stack->le_connecting_request != LE_CONNECTING_IDLE){ 6468 log_error("le connection already active"); 6469 return ERROR_CODE_COMMAND_DISALLOWED; 6470 } 6471 6472 log_info("gap_connect: no connection exists yet, creating context"); 6473 conn = create_connection_for_bd_addr_and_type(addr, addr_type); 6474 if (!conn){ 6475 // notify client that alloc failed 6476 hci_emit_le_connection_complete(addr_type, addr, 0, BTSTACK_MEMORY_ALLOC_FAILED); 6477 log_info("gap_connect: failed to alloc hci_connection_t"); 6478 return GATT_CLIENT_NOT_CONNECTED; // don't sent packet to controller 6479 } 6480 6481 // set le connecting state 6482 if (hci_is_le_connection_type(addr_type)){ 6483 hci_stack->le_connecting_request = LE_CONNECTING_DIRECT; 6484 } 6485 6486 conn->state = SEND_CREATE_CONNECTION; 6487 log_info("gap_connect: send create connection next"); 6488 hci_run(); 6489 return ERROR_CODE_SUCCESS; 6490 } 6491 6492 if (!hci_is_le_connection(conn) || 6493 (conn->state == SEND_CREATE_CONNECTION) || 6494 (conn->state == SENT_CREATE_CONNECTION)) { 6495 hci_emit_le_connection_complete(conn->address_type, conn->address, 0, ERROR_CODE_COMMAND_DISALLOWED); 6496 log_error("gap_connect: classic connection or connect is already being created"); 6497 return GATT_CLIENT_IN_WRONG_STATE; 6498 } 6499 6500 // check if connection was just disconnected 6501 if (conn->state == RECEIVED_DISCONNECTION_COMPLETE){ 6502 log_info("gap_connect: send create connection (again)"); 6503 conn->state = SEND_CREATE_CONNECTION; 6504 hci_run(); 6505 return ERROR_CODE_SUCCESS; 6506 } 6507 6508 log_info("gap_connect: context exists with state %u", conn->state); 6509 hci_emit_le_connection_complete(conn->address_type, conn->address, conn->con_handle, ERROR_CODE_SUCCESS); 6510 hci_run(); 6511 return ERROR_CODE_SUCCESS; 6512 } 6513 6514 // @assumption: only a single outgoing LE Connection exists 6515 static hci_connection_t * gap_get_outgoing_connection(void){ 6516 btstack_linked_item_t *it; 6517 for (it = (btstack_linked_item_t *) hci_stack->connections; it != NULL; it = it->next){ 6518 hci_connection_t * conn = (hci_connection_t *) it; 6519 if (!hci_is_le_connection(conn)) continue; 6520 switch (conn->state){ 6521 case SEND_CREATE_CONNECTION: 6522 case SENT_CREATE_CONNECTION: 6523 case SENT_CANCEL_CONNECTION: 6524 return conn; 6525 default: 6526 break; 6527 }; 6528 } 6529 return NULL; 6530 } 6531 6532 uint8_t gap_connect_cancel(void){ 6533 hci_connection_t * conn = gap_get_outgoing_connection(); 6534 if (!conn) return 0; 6535 switch (conn->state){ 6536 case SEND_CREATE_CONNECTION: 6537 // skip sending create connection and emit event instead 6538 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 6539 hci_emit_le_connection_complete(conn->address_type, conn->address, 0, ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER); 6540 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 6541 btstack_memory_hci_connection_free( conn ); 6542 break; 6543 case SENT_CREATE_CONNECTION: 6544 // request to send cancel connection 6545 conn->state = SEND_CANCEL_CONNECTION; 6546 hci_run(); 6547 break; 6548 default: 6549 break; 6550 } 6551 return 0; 6552 } 6553 6554 /** 6555 * @brief Set connection parameters for outgoing connections 6556 * @param conn_scan_interval (unit: 0.625 msec), default: 60 ms 6557 * @param conn_scan_window (unit: 0.625 msec), default: 30 ms 6558 * @param conn_interval_min (unit: 1.25ms), default: 10 ms 6559 * @param conn_interval_max (unit: 1.25ms), default: 30 ms 6560 * @param conn_latency, default: 4 6561 * @param supervision_timeout (unit: 10ms), default: 720 ms 6562 * @param min_ce_length (unit: 0.625ms), default: 10 ms 6563 * @param max_ce_length (unit: 0.625ms), default: 30 ms 6564 */ 6565 6566 void gap_set_connection_parameters(uint16_t conn_scan_interval, uint16_t conn_scan_window, 6567 uint16_t conn_interval_min, uint16_t conn_interval_max, uint16_t conn_latency, 6568 uint16_t supervision_timeout, uint16_t min_ce_length, uint16_t max_ce_length){ 6569 hci_stack->le_connection_scan_interval = conn_scan_interval; 6570 hci_stack->le_connection_scan_window = conn_scan_window; 6571 hci_stack->le_connection_interval_min = conn_interval_min; 6572 hci_stack->le_connection_interval_max = conn_interval_max; 6573 hci_stack->le_connection_latency = conn_latency; 6574 hci_stack->le_supervision_timeout = supervision_timeout; 6575 hci_stack->le_minimum_ce_length = min_ce_length; 6576 hci_stack->le_maximum_ce_length = max_ce_length; 6577 } 6578 #endif 6579 6580 /** 6581 * @brief Updates the connection parameters for a given LE connection 6582 * @param handle 6583 * @param conn_interval_min (unit: 1.25ms) 6584 * @param conn_interval_max (unit: 1.25ms) 6585 * @param conn_latency 6586 * @param supervision_timeout (unit: 10ms) 6587 * @return 0 if ok 6588 */ 6589 int gap_update_connection_parameters(hci_con_handle_t con_handle, uint16_t conn_interval_min, 6590 uint16_t conn_interval_max, uint16_t conn_latency, uint16_t supervision_timeout){ 6591 hci_connection_t * connection = hci_connection_for_handle(con_handle); 6592 if (!connection) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 6593 connection->le_conn_interval_min = conn_interval_min; 6594 connection->le_conn_interval_max = conn_interval_max; 6595 connection->le_conn_latency = conn_latency; 6596 connection->le_supervision_timeout = supervision_timeout; 6597 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_CHANGE_HCI_CON_PARAMETERS; 6598 hci_run(); 6599 return 0; 6600 } 6601 6602 /** 6603 * @brief Request an update of the connection parameter for a given LE connection 6604 * @param handle 6605 * @param conn_interval_min (unit: 1.25ms) 6606 * @param conn_interval_max (unit: 1.25ms) 6607 * @param conn_latency 6608 * @param supervision_timeout (unit: 10ms) 6609 * @return 0 if ok 6610 */ 6611 int gap_request_connection_parameter_update(hci_con_handle_t con_handle, uint16_t conn_interval_min, 6612 uint16_t conn_interval_max, uint16_t conn_latency, uint16_t supervision_timeout){ 6613 hci_connection_t * connection = hci_connection_for_handle(con_handle); 6614 if (!connection) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 6615 connection->le_conn_interval_min = conn_interval_min; 6616 connection->le_conn_interval_max = conn_interval_max; 6617 connection->le_conn_latency = conn_latency; 6618 connection->le_supervision_timeout = supervision_timeout; 6619 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_SEND_REQUEST; 6620 uint8_t l2cap_trigger_run_event[2] = { L2CAP_EVENT_TRIGGER_RUN, 0}; 6621 hci_emit_event(l2cap_trigger_run_event, sizeof(l2cap_trigger_run_event), 0); 6622 return 0; 6623 } 6624 6625 #ifdef ENABLE_LE_PERIPHERAL 6626 6627 /** 6628 * @brief Set Advertisement Data 6629 * @param advertising_data_length 6630 * @param advertising_data (max 31 octets) 6631 * @note data is not copied, pointer has to stay valid 6632 */ 6633 void gap_advertisements_set_data(uint8_t advertising_data_length, uint8_t * advertising_data){ 6634 hci_stack->le_advertisements_data_len = advertising_data_length; 6635 hci_stack->le_advertisements_data = advertising_data; 6636 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_ADV_DATA; 6637 hci_run(); 6638 } 6639 6640 /** 6641 * @brief Set Scan Response Data 6642 * @param advertising_data_length 6643 * @param advertising_data (max 31 octets) 6644 * @note data is not copied, pointer has to stay valid 6645 */ 6646 void gap_scan_response_set_data(uint8_t scan_response_data_length, uint8_t * scan_response_data){ 6647 hci_stack->le_scan_response_data_len = scan_response_data_length; 6648 hci_stack->le_scan_response_data = scan_response_data; 6649 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA; 6650 hci_run(); 6651 } 6652 6653 /** 6654 * @brief Set Advertisement Parameters 6655 * @param adv_int_min 6656 * @param adv_int_max 6657 * @param adv_type 6658 * @param direct_address_type 6659 * @param direct_address 6660 * @param channel_map 6661 * @param filter_policy 6662 * 6663 * @note internal use. use gap_advertisements_set_params from gap_le.h instead. 6664 */ 6665 void hci_le_advertisements_set_params(uint16_t adv_int_min, uint16_t adv_int_max, uint8_t adv_type, 6666 uint8_t direct_address_typ, bd_addr_t direct_address, 6667 uint8_t channel_map, uint8_t filter_policy) { 6668 6669 hci_stack->le_advertisements_interval_min = adv_int_min; 6670 hci_stack->le_advertisements_interval_max = adv_int_max; 6671 hci_stack->le_advertisements_type = adv_type; 6672 hci_stack->le_advertisements_direct_address_type = direct_address_typ; 6673 hci_stack->le_advertisements_channel_map = channel_map; 6674 hci_stack->le_advertisements_filter_policy = filter_policy; 6675 (void)memcpy(hci_stack->le_advertisements_direct_address, direct_address, 6676 6); 6677 6678 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_PARAMS; 6679 hci_stack->le_advertisements_state |= LE_ADVERTISEMENT_STATE_PARAMS_SET; 6680 hci_run(); 6681 } 6682 6683 /** 6684 * @brief Enable/Disable Advertisements 6685 * @param enabled 6686 */ 6687 void gap_advertisements_enable(int enabled){ 6688 if (enabled == 0){ 6689 hci_stack->le_advertisements_state &= ~LE_ADVERTISEMENT_STATE_ENABLED; 6690 } else { 6691 hci_stack->le_advertisements_state |= LE_ADVERTISEMENT_STATE_ENABLED; 6692 } 6693 hci_update_advertisements_enabled_for_current_roles(); 6694 hci_run(); 6695 } 6696 6697 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 6698 static le_advertising_set_t * hci_advertising_set_for_handle(uint8_t advertising_handle){ 6699 btstack_linked_list_iterator_t it; 6700 btstack_linked_list_iterator_init(&it, &hci_stack->le_advertising_sets); 6701 while (btstack_linked_list_iterator_has_next(&it)){ 6702 le_advertising_set_t * item = (le_advertising_set_t *) btstack_linked_list_iterator_next(&it); 6703 if ( item->advertising_handle == advertising_handle ) { 6704 return item; 6705 } 6706 } 6707 return NULL; 6708 } 6709 6710 uint8_t gap_extended_advertising_setup(le_advertising_set_t * storage, const le_extended_advertising_parameters_t * advertising_parameters, uint8_t * out_advertising_handle){ 6711 // find free advertisement handle 6712 uint8_t advertisement_handle; 6713 for (advertisement_handle = 1; advertisement_handle <= LE_EXTENDED_ADVERTISING_MAX_HANDLE; advertisement_handle++){ 6714 if (hci_advertising_set_for_handle(advertisement_handle) == NULL) break; 6715 } 6716 if (advertisement_handle > LE_EXTENDED_ADVERTISING_MAX_HANDLE) return ERROR_CODE_MEMORY_CAPACITY_EXCEEDED; 6717 // clear 6718 memset(storage, 0, sizeof(le_advertising_set_t)); 6719 // copy params 6720 storage->advertising_handle = advertisement_handle; 6721 memcpy(&storage->extended_params, advertising_parameters, sizeof(le_extended_advertising_parameters_t)); 6722 // add to list 6723 bool add_ok = btstack_linked_list_add(&hci_stack->le_advertising_sets, (btstack_linked_item_t *) storage); 6724 if (!add_ok) return ERROR_CODE_ACL_CONNECTION_ALREADY_EXISTS; 6725 *out_advertising_handle = advertisement_handle; 6726 // set tasks and start 6727 storage->tasks = LE_ADVERTISEMENT_TASKS_SET_PARAMS; 6728 hci_run(); 6729 return ERROR_CODE_SUCCESS; 6730 } 6731 6732 uint8_t gap_extended_advertising_set_params(uint8_t advertising_handle, const le_extended_advertising_parameters_t * advertising_parameters){ 6733 le_advertising_set_t * advertising_set = hci_advertising_set_for_handle(advertising_handle); 6734 if (advertising_set == NULL) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 6735 memcpy(&advertising_set->extended_params, advertising_parameters, sizeof(le_extended_advertising_parameters_t)); 6736 // set tasks and start 6737 advertising_set->tasks |= LE_ADVERTISEMENT_TASKS_SET_PARAMS; 6738 hci_run(); 6739 return ERROR_CODE_SUCCESS; 6740 } 6741 6742 uint8_t gap_extended_advertising_get_params(uint8_t advertising_handle, le_extended_advertising_parameters_t * advertising_parameters){ 6743 le_advertising_set_t * advertising_set = hci_advertising_set_for_handle(advertising_handle); 6744 if (advertising_set == NULL) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 6745 memcpy(advertising_parameters, &advertising_set->extended_params, sizeof(le_extended_advertising_parameters_t)); 6746 return ERROR_CODE_SUCCESS; 6747 } 6748 6749 uint8_t gap_periodic_advertising_set_params(uint8_t advertising_handle, const le_periodic_advertising_parameters_t * advertising_parameters){ 6750 le_advertising_set_t * advertising_set = hci_advertising_set_for_handle(advertising_handle); 6751 if (advertising_set == NULL) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 6752 // periodic advertising requires neither connectable, scannable, legacy or anonymous 6753 if ((advertising_set->extended_params.advertising_event_properties & 0x1f) != 0) return ERROR_CODE_INVALID_HCI_COMMAND_PARAMETERS; 6754 memcpy(&advertising_set->periodic_params, advertising_parameters, sizeof(le_periodic_advertising_parameters_t)); 6755 // set tasks and start 6756 advertising_set->tasks |= LE_ADVERTISEMENT_TASKS_SET_PERIODIC_PARAMS; 6757 hci_run(); 6758 return ERROR_CODE_SUCCESS; 6759 } 6760 6761 uint8_t gap_periodic_advertising_get_params(uint8_t advertising_handle, le_periodic_advertising_parameters_t * advertising_parameters){ 6762 le_advertising_set_t * advertising_set = hci_advertising_set_for_handle(advertising_handle); 6763 if (advertising_set == NULL) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 6764 memcpy(advertising_parameters, &advertising_set->extended_params, sizeof(le_periodic_advertising_parameters_t)); 6765 return ERROR_CODE_SUCCESS; 6766 } 6767 6768 uint8_t gap_extended_advertising_set_random_address(uint8_t advertising_handle, bd_addr_t random_address){ 6769 le_advertising_set_t * advertising_set = hci_advertising_set_for_handle(advertising_handle); 6770 if (advertising_set == NULL) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 6771 memcpy(advertising_set->random_address, random_address, 6); 6772 // set tasks and start 6773 advertising_set->tasks |= LE_ADVERTISEMENT_TASKS_SET_ADDRESS; 6774 hci_run(); 6775 return ERROR_CODE_SUCCESS; 6776 } 6777 6778 uint8_t gap_extended_advertising_set_adv_data(uint8_t advertising_handle, uint16_t advertising_data_length, const uint8_t * advertising_data){ 6779 le_advertising_set_t * advertising_set = hci_advertising_set_for_handle(advertising_handle); 6780 if (advertising_set == NULL) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 6781 advertising_set->adv_data = advertising_data; 6782 advertising_set->adv_data_len = advertising_data_length; 6783 // set tasks and start 6784 advertising_set->tasks |= LE_ADVERTISEMENT_TASKS_SET_ADV_DATA; 6785 hci_run(); 6786 return ERROR_CODE_SUCCESS; 6787 } 6788 6789 uint8_t gap_extended_advertising_set_scan_response_data(uint8_t advertising_handle, uint16_t scan_response_data_length, const uint8_t * scan_response_data){ 6790 le_advertising_set_t * advertising_set = hci_advertising_set_for_handle(advertising_handle); 6791 if (advertising_set == NULL) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 6792 advertising_set->scan_data = scan_response_data; 6793 advertising_set->scan_data_len = scan_response_data_length; 6794 // set tasks and start 6795 advertising_set->tasks |= LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA; 6796 hci_run(); 6797 return ERROR_CODE_SUCCESS; 6798 } 6799 6800 uint8_t gap_periodic_advertising_set_data(uint8_t advertising_handle, uint16_t periodic_data_length, const uint8_t * periodic_data){ 6801 le_advertising_set_t * advertising_set = hci_advertising_set_for_handle(advertising_handle); 6802 if (advertising_set == NULL) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 6803 advertising_set->periodic_data = periodic_data; 6804 advertising_set->periodic_data_len = periodic_data_length; 6805 // set tasks and start 6806 advertising_set->tasks |= LE_ADVERTISEMENT_TASKS_SET_PERIODIC_DATA; 6807 hci_run(); 6808 return ERROR_CODE_SUCCESS; 6809 } 6810 6811 uint8_t gap_extended_advertising_start(uint8_t advertising_handle, uint16_t timeout, uint8_t num_extended_advertising_events){ 6812 le_advertising_set_t * advertising_set = hci_advertising_set_for_handle(advertising_handle); 6813 if (advertising_set == NULL) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 6814 advertising_set->enable_timeout = timeout; 6815 advertising_set->enable_max_scan_events = num_extended_advertising_events; 6816 // set tasks and start 6817 advertising_set->state |= LE_ADVERTISEMENT_STATE_ENABLED; 6818 hci_run(); 6819 return ERROR_CODE_SUCCESS; 6820 } 6821 6822 uint8_t gap_extended_advertising_stop(uint8_t advertising_handle){ 6823 le_advertising_set_t * advertising_set = hci_advertising_set_for_handle(advertising_handle); 6824 if (advertising_set == NULL) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 6825 // set tasks and start 6826 advertising_set->state &= ~LE_ADVERTISEMENT_STATE_ENABLED; 6827 hci_run(); 6828 return ERROR_CODE_SUCCESS; 6829 } 6830 6831 uint8_t gap_periodic_advertising_start(uint8_t advertising_handle, bool include_adi){ 6832 le_advertising_set_t * advertising_set = hci_advertising_set_for_handle(advertising_handle); 6833 if (advertising_set == NULL) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 6834 // set tasks and start 6835 advertising_set->periodic_include_adi = include_adi; 6836 advertising_set->state |= LE_ADVERTISEMENT_STATE_PERIODIC_ENABLED; 6837 hci_run(); 6838 return ERROR_CODE_SUCCESS; 6839 } 6840 6841 uint8_t gap_periodic_advertising_stop(uint8_t advertising_handle){ 6842 le_advertising_set_t * advertising_set = hci_advertising_set_for_handle(advertising_handle); 6843 if (advertising_set == NULL) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 6844 // set tasks and start 6845 advertising_set->state &= ~LE_ADVERTISEMENT_STATE_PERIODIC_ENABLED; 6846 hci_run(); 6847 return ERROR_CODE_SUCCESS; 6848 } 6849 6850 uint8_t gap_extended_advertising_remove(uint8_t advertising_handle){ 6851 le_advertising_set_t * advertising_set = hci_advertising_set_for_handle(advertising_handle); 6852 if (advertising_set == NULL) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 6853 // set tasks and start 6854 advertising_set->tasks |= LE_ADVERTISEMENT_TASKS_REMOVE_SET; 6855 hci_run(); 6856 return ERROR_CODE_SUCCESS; 6857 } 6858 #endif 6859 6860 #endif 6861 6862 void hci_le_set_own_address_type(uint8_t own_address_type){ 6863 log_info("hci_le_set_own_address_type: old %u, new %u", hci_stack->le_own_addr_type, own_address_type); 6864 if (own_address_type == hci_stack->le_own_addr_type) return; 6865 hci_stack->le_own_addr_type = own_address_type; 6866 6867 #ifdef ENABLE_LE_PERIPHERAL 6868 // update advertisement parameters, too 6869 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_PARAMS; 6870 hci_run(); 6871 #endif 6872 #ifdef ENABLE_LE_CENTRAL 6873 // note: we don't update scan parameters or modify ongoing connection attempts 6874 #endif 6875 } 6876 6877 void hci_le_random_address_set(const bd_addr_t random_address){ 6878 memcpy(hci_stack->le_random_address, random_address, 6); 6879 hci_stack->le_random_address_set = true; 6880 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_ADDRESS; 6881 hci_run(); 6882 } 6883 6884 #endif 6885 6886 uint8_t gap_disconnect(hci_con_handle_t handle){ 6887 hci_connection_t * conn = hci_connection_for_handle(handle); 6888 if (!conn){ 6889 hci_emit_disconnection_complete(handle, 0); 6890 return 0; 6891 } 6892 // ignore if already disconnected 6893 if (conn->state == RECEIVED_DISCONNECTION_COMPLETE){ 6894 return 0; 6895 } 6896 conn->state = SEND_DISCONNECT; 6897 hci_run(); 6898 return 0; 6899 } 6900 6901 int gap_read_rssi(hci_con_handle_t con_handle){ 6902 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 6903 if (hci_connection == NULL) return 0; 6904 connectionSetAuthenticationFlags(hci_connection, AUTH_FLAG_READ_RSSI); 6905 hci_run(); 6906 return 1; 6907 } 6908 6909 /** 6910 * @brief Get connection type 6911 * @param con_handle 6912 * @result connection_type 6913 */ 6914 gap_connection_type_t gap_get_connection_type(hci_con_handle_t connection_handle){ 6915 hci_connection_t * conn = hci_connection_for_handle(connection_handle); 6916 if (!conn) return GAP_CONNECTION_INVALID; 6917 switch (conn->address_type){ 6918 case BD_ADDR_TYPE_LE_PUBLIC: 6919 case BD_ADDR_TYPE_LE_RANDOM: 6920 return GAP_CONNECTION_LE; 6921 case BD_ADDR_TYPE_SCO: 6922 return GAP_CONNECTION_SCO; 6923 case BD_ADDR_TYPE_ACL: 6924 return GAP_CONNECTION_ACL; 6925 default: 6926 return GAP_CONNECTION_INVALID; 6927 } 6928 } 6929 6930 hci_role_t gap_get_role(hci_con_handle_t connection_handle){ 6931 hci_connection_t * conn = hci_connection_for_handle(connection_handle); 6932 if (!conn) return HCI_ROLE_INVALID; 6933 return (hci_role_t) conn->role; 6934 } 6935 6936 6937 #ifdef ENABLE_CLASSIC 6938 uint8_t gap_request_role(const bd_addr_t addr, hci_role_t role){ 6939 hci_connection_t * conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 6940 if (!conn) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 6941 conn->request_role = role; 6942 hci_run(); 6943 return ERROR_CODE_SUCCESS; 6944 } 6945 #endif 6946 6947 #ifdef ENABLE_BLE 6948 6949 uint8_t gap_le_set_phy(hci_con_handle_t con_handle, uint8_t all_phys, uint8_t tx_phys, uint8_t rx_phys, uint8_t phy_options){ 6950 hci_connection_t * conn = hci_connection_for_handle(con_handle); 6951 if (!conn) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 6952 6953 conn->le_phy_update_all_phys = all_phys; 6954 conn->le_phy_update_tx_phys = tx_phys; 6955 conn->le_phy_update_rx_phys = rx_phys; 6956 conn->le_phy_update_phy_options = phy_options; 6957 6958 hci_run(); 6959 6960 return 0; 6961 } 6962 6963 static uint8_t hci_whitelist_add(bd_addr_type_t address_type, const bd_addr_t address){ 6964 // check if already in list 6965 btstack_linked_list_iterator_t it; 6966 btstack_linked_list_iterator_init(&it, &hci_stack->le_whitelist); 6967 while (btstack_linked_list_iterator_has_next(&it)) { 6968 whitelist_entry_t *entry = (whitelist_entry_t *) btstack_linked_list_iterator_next(&it); 6969 if (entry->address_type != address_type) { 6970 continue; 6971 } 6972 if (memcmp(entry->address, address, 6) != 0) { 6973 continue; 6974 } 6975 // disallow if already scheduled to add 6976 if ((entry->state & LE_WHITELIST_ADD_TO_CONTROLLER) != 0){ 6977 return ERROR_CODE_COMMAND_DISALLOWED; 6978 } 6979 // still on controller, but scheduled to remove -> re-add 6980 entry->state |= LE_WHITELIST_ADD_TO_CONTROLLER; 6981 return ERROR_CODE_SUCCESS; 6982 } 6983 // alloc and add to list 6984 whitelist_entry_t * entry = btstack_memory_whitelist_entry_get(); 6985 if (!entry) return BTSTACK_MEMORY_ALLOC_FAILED; 6986 entry->address_type = address_type; 6987 (void)memcpy(entry->address, address, 6); 6988 entry->state = LE_WHITELIST_ADD_TO_CONTROLLER; 6989 btstack_linked_list_add(&hci_stack->le_whitelist, (btstack_linked_item_t*) entry); 6990 return ERROR_CODE_SUCCESS; 6991 } 6992 6993 static uint8_t hci_whitelist_remove(bd_addr_type_t address_type, const bd_addr_t address){ 6994 btstack_linked_list_iterator_t it; 6995 btstack_linked_list_iterator_init(&it, &hci_stack->le_whitelist); 6996 while (btstack_linked_list_iterator_has_next(&it)){ 6997 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&it); 6998 if (entry->address_type != address_type) { 6999 continue; 7000 } 7001 if (memcmp(entry->address, address, 6) != 0) { 7002 continue; 7003 } 7004 if (entry->state & LE_WHITELIST_ON_CONTROLLER){ 7005 // remove from controller if already present 7006 entry->state |= LE_WHITELIST_REMOVE_FROM_CONTROLLER; 7007 } else { 7008 // directly remove entry from whitelist 7009 btstack_linked_list_iterator_remove(&it); 7010 btstack_memory_whitelist_entry_free(entry); 7011 } 7012 return ERROR_CODE_SUCCESS; 7013 } 7014 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 7015 } 7016 7017 static void hci_whitelist_clear(void){ 7018 btstack_linked_list_iterator_t it; 7019 btstack_linked_list_iterator_init(&it, &hci_stack->le_whitelist); 7020 while (btstack_linked_list_iterator_has_next(&it)){ 7021 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&it); 7022 if (entry->state & LE_WHITELIST_ON_CONTROLLER){ 7023 // remove from controller if already present 7024 entry->state |= LE_WHITELIST_REMOVE_FROM_CONTROLLER; 7025 continue; 7026 } 7027 // directly remove entry from whitelist 7028 btstack_linked_list_iterator_remove(&it); 7029 btstack_memory_whitelist_entry_free(entry); 7030 } 7031 } 7032 7033 // free all entries unconditionally 7034 static void hci_whitelist_free(void){ 7035 btstack_linked_list_iterator_t lit; 7036 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 7037 while (btstack_linked_list_iterator_has_next(&lit)){ 7038 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&lit); 7039 btstack_linked_list_remove(&hci_stack->le_whitelist, (btstack_linked_item_t *) entry); 7040 btstack_memory_whitelist_entry_free(entry); 7041 } 7042 } 7043 7044 /** 7045 * @brief Clear Whitelist 7046 * @return 0 if ok 7047 */ 7048 uint8_t gap_whitelist_clear(void){ 7049 hci_whitelist_clear(); 7050 hci_run(); 7051 return ERROR_CODE_SUCCESS; 7052 } 7053 7054 /** 7055 * @brief Add Device to Whitelist 7056 * @param address_typ 7057 * @param address 7058 * @return 0 if ok 7059 */ 7060 uint8_t gap_whitelist_add(bd_addr_type_t address_type, const bd_addr_t address){ 7061 uint8_t status = hci_whitelist_add(address_type, address); 7062 if (status){ 7063 return status; 7064 } 7065 hci_run(); 7066 return ERROR_CODE_SUCCESS; 7067 } 7068 7069 /** 7070 * @brief Remove Device from Whitelist 7071 * @param address_typ 7072 * @param address 7073 * @return 0 if ok 7074 */ 7075 uint8_t gap_whitelist_remove(bd_addr_type_t address_type, const bd_addr_t address){ 7076 uint8_t status = hci_whitelist_remove(address_type, address); 7077 if (status){ 7078 return status; 7079 } 7080 hci_run(); 7081 return ERROR_CODE_SUCCESS; 7082 } 7083 7084 #ifdef ENABLE_LE_CENTRAL 7085 /** 7086 * @brief Connect with Whitelist 7087 * @note Explicit whitelist management and this connect with whitelist replace deprecated gap_auto_connection_* functions 7088 * @return - if ok 7089 */ 7090 uint8_t gap_connect_with_whitelist(void){ 7091 if (hci_stack->le_connecting_request != LE_CONNECTING_IDLE){ 7092 return ERROR_CODE_COMMAND_DISALLOWED; 7093 } 7094 hci_stack->le_connecting_request = LE_CONNECTING_WHITELIST; 7095 hci_run(); 7096 return ERROR_CODE_SUCCESS; 7097 } 7098 7099 /** 7100 * @brief Auto Connection Establishment - Start Connecting to device 7101 * @param address_typ 7102 * @param address 7103 * @return 0 if ok 7104 */ 7105 uint8_t gap_auto_connection_start(bd_addr_type_t address_type, const bd_addr_t address){ 7106 if (hci_stack->le_connecting_request == LE_CONNECTING_DIRECT){ 7107 return ERROR_CODE_COMMAND_DISALLOWED; 7108 } 7109 7110 uint8_t status = hci_whitelist_add(address_type, address); 7111 if (status == BTSTACK_MEMORY_ALLOC_FAILED) { 7112 return status; 7113 } 7114 7115 hci_stack->le_connecting_request = LE_CONNECTING_WHITELIST; 7116 7117 hci_run(); 7118 return ERROR_CODE_SUCCESS; 7119 } 7120 7121 /** 7122 * @brief Auto Connection Establishment - Stop Connecting to device 7123 * @param address_typ 7124 * @param address 7125 * @return 0 if ok 7126 */ 7127 uint8_t gap_auto_connection_stop(bd_addr_type_t address_type, const bd_addr_t address){ 7128 if (hci_stack->le_connecting_request == LE_CONNECTING_DIRECT){ 7129 return ERROR_CODE_COMMAND_DISALLOWED; 7130 } 7131 7132 hci_whitelist_remove(address_type, address); 7133 if (btstack_linked_list_empty(&hci_stack->le_whitelist)){ 7134 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 7135 } 7136 hci_run(); 7137 return 0; 7138 } 7139 7140 /** 7141 * @brief Auto Connection Establishment - Stop everything 7142 * @note Convenience function to stop all active auto connection attempts 7143 */ 7144 uint8_t gap_auto_connection_stop_all(void){ 7145 if (hci_stack->le_connecting_request == LE_CONNECTING_DIRECT) { 7146 return ERROR_CODE_COMMAND_DISALLOWED; 7147 } 7148 hci_whitelist_clear(); 7149 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 7150 hci_run(); 7151 return ERROR_CODE_SUCCESS; 7152 } 7153 7154 uint16_t gap_le_connection_interval(hci_con_handle_t con_handle){ 7155 hci_connection_t * conn = hci_connection_for_handle(con_handle); 7156 if (!conn) return 0; 7157 return conn->le_connection_interval; 7158 } 7159 #endif 7160 #endif 7161 7162 #ifdef ENABLE_CLASSIC 7163 /** 7164 * @brief Set Extended Inquiry Response data 7165 * @param eir_data size HCI_EXTENDED_INQUIRY_RESPONSE_DATA_LEN (240) bytes, is not copied make sure memory is accessible during stack startup 7166 * @note has to be done before stack starts up 7167 */ 7168 void gap_set_extended_inquiry_response(const uint8_t * data){ 7169 hci_stack->eir_data = data; 7170 hci_stack->gap_tasks_classic |= GAP_TASK_SET_EIR_DATA; 7171 hci_run(); 7172 } 7173 7174 /** 7175 * @brief Start GAP Classic Inquiry 7176 * @param duration in 1.28s units 7177 * @return 0 if ok 7178 * @events: GAP_EVENT_INQUIRY_RESULT, GAP_EVENT_INQUIRY_COMPLETE 7179 */ 7180 int gap_inquiry_start(uint8_t duration_in_1280ms_units){ 7181 if (hci_stack->state != HCI_STATE_WORKING) return ERROR_CODE_COMMAND_DISALLOWED; 7182 if (hci_stack->inquiry_state != GAP_INQUIRY_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 7183 if ((duration_in_1280ms_units < GAP_INQUIRY_DURATION_MIN) || (duration_in_1280ms_units > GAP_INQUIRY_DURATION_MAX)){ 7184 return ERROR_CODE_INVALID_HCI_COMMAND_PARAMETERS; 7185 } 7186 hci_stack->inquiry_state = duration_in_1280ms_units; 7187 hci_run(); 7188 return 0; 7189 } 7190 7191 /** 7192 * @brief Stop GAP Classic Inquiry 7193 * @return 0 if ok 7194 */ 7195 int gap_inquiry_stop(void){ 7196 if ((hci_stack->inquiry_state >= GAP_INQUIRY_DURATION_MIN) && (hci_stack->inquiry_state <= GAP_INQUIRY_DURATION_MAX)) { 7197 // emit inquiry complete event, before it even started 7198 uint8_t event[] = { GAP_EVENT_INQUIRY_COMPLETE, 1, 0}; 7199 hci_emit_event(event, sizeof(event), 1); 7200 return 0; 7201 } 7202 if (hci_stack->inquiry_state != GAP_INQUIRY_STATE_ACTIVE) return ERROR_CODE_COMMAND_DISALLOWED; 7203 hci_stack->inquiry_state = GAP_INQUIRY_STATE_W2_CANCEL; 7204 hci_run(); 7205 return 0; 7206 } 7207 7208 void gap_inquiry_set_lap(uint32_t lap){ 7209 hci_stack->inquiry_lap = lap; 7210 } 7211 7212 void gap_inquiry_set_scan_activity(uint16_t inquiry_scan_interval, uint16_t inquiry_scan_window){ 7213 hci_stack->inquiry_scan_interval = inquiry_scan_interval; 7214 hci_stack->inquiry_scan_window = inquiry_scan_window; 7215 hci_stack->gap_tasks_classic |= GAP_TASK_WRITE_INQUIRY_SCAN_ACTIVITY; 7216 hci_run(); 7217 } 7218 7219 7220 /** 7221 * @brief Remote Name Request 7222 * @param addr 7223 * @param page_scan_repetition_mode 7224 * @param clock_offset only used when bit 15 is set 7225 * @events: HCI_EVENT_REMOTE_NAME_REQUEST_COMPLETE 7226 */ 7227 int gap_remote_name_request(const bd_addr_t addr, uint8_t page_scan_repetition_mode, uint16_t clock_offset){ 7228 if (hci_stack->remote_name_state != GAP_REMOTE_NAME_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 7229 (void)memcpy(hci_stack->remote_name_addr, addr, 6); 7230 hci_stack->remote_name_page_scan_repetition_mode = page_scan_repetition_mode; 7231 hci_stack->remote_name_clock_offset = clock_offset; 7232 hci_stack->remote_name_state = GAP_REMOTE_NAME_STATE_W2_SEND; 7233 hci_run(); 7234 return 0; 7235 } 7236 7237 static int gap_pairing_set_state_and_run(const bd_addr_t addr, uint8_t state){ 7238 hci_stack->gap_pairing_state = state; 7239 (void)memcpy(hci_stack->gap_pairing_addr, addr, 6); 7240 hci_run(); 7241 return 0; 7242 } 7243 7244 /** 7245 * @brief Legacy Pairing Pin Code Response for binary data / non-strings 7246 * @param addr 7247 * @param pin_data 7248 * @param pin_len 7249 * @return 0 if ok 7250 */ 7251 int gap_pin_code_response_binary(const bd_addr_t addr, const uint8_t * pin_data, uint8_t pin_len){ 7252 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 7253 hci_stack->gap_pairing_input.gap_pairing_pin = pin_data; 7254 hci_stack->gap_pairing_pin_len = pin_len; 7255 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PIN); 7256 } 7257 7258 /** 7259 * @brief Legacy Pairing Pin Code Response 7260 * @param addr 7261 * @param pin 7262 * @return 0 if ok 7263 */ 7264 int gap_pin_code_response(const bd_addr_t addr, const char * pin){ 7265 return gap_pin_code_response_binary(addr, (const uint8_t*) pin, strlen(pin)); 7266 } 7267 7268 /** 7269 * @brief Abort Legacy Pairing 7270 * @param addr 7271 * @param pin 7272 * @return 0 if ok 7273 */ 7274 int gap_pin_code_negative(bd_addr_t addr){ 7275 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 7276 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PIN_NEGATIVE); 7277 } 7278 7279 /** 7280 * @brief SSP Passkey Response 7281 * @param addr 7282 * @param passkey 7283 * @return 0 if ok 7284 */ 7285 int gap_ssp_passkey_response(const bd_addr_t addr, uint32_t passkey){ 7286 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 7287 hci_stack->gap_pairing_input.gap_pairing_passkey = passkey; 7288 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PASSKEY); 7289 } 7290 7291 /** 7292 * @brief Abort SSP Passkey Entry/Pairing 7293 * @param addr 7294 * @param pin 7295 * @return 0 if ok 7296 */ 7297 int gap_ssp_passkey_negative(const bd_addr_t addr){ 7298 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 7299 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PASSKEY_NEGATIVE); 7300 } 7301 7302 /** 7303 * @brief Accept SSP Numeric Comparison 7304 * @param addr 7305 * @param passkey 7306 * @return 0 if ok 7307 */ 7308 int gap_ssp_confirmation_response(const bd_addr_t addr){ 7309 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 7310 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_CONFIRMATION); 7311 } 7312 7313 /** 7314 * @brief Abort SSP Numeric Comparison/Pairing 7315 * @param addr 7316 * @param pin 7317 * @return 0 if ok 7318 */ 7319 int gap_ssp_confirmation_negative(const bd_addr_t addr){ 7320 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 7321 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_CONFIRMATION_NEGATIVE); 7322 } 7323 7324 #if defined(ENABLE_EXPLICIT_IO_CAPABILITIES_REPLY) || defined(ENABLE_EXPLICIT_LINK_KEY_REPLY) 7325 static uint8_t gap_set_auth_flag_and_run(const bd_addr_t addr, hci_authentication_flags_t flag){ 7326 hci_connection_t * conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 7327 if (!conn) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 7328 connectionSetAuthenticationFlags(conn, flag); 7329 hci_run(); 7330 return ERROR_CODE_SUCCESS; 7331 } 7332 #endif 7333 7334 #ifdef ENABLE_EXPLICIT_IO_CAPABILITIES_REPLY 7335 uint8_t gap_ssp_io_capabilities_response(const bd_addr_t addr){ 7336 return gap_set_auth_flag_and_run(addr, AUTH_FLAG_SEND_IO_CAPABILITIES_REPLY); 7337 } 7338 7339 uint8_t gap_ssp_io_capabilities_negative(const bd_addr_t addr){ 7340 return gap_set_auth_flag_and_run(addr, AUTH_FLAG_SEND_IO_CAPABILITIES_NEGATIVE_REPLY); 7341 } 7342 #endif 7343 7344 #ifdef ENABLE_CLASSIC_PAIRING_OOB 7345 /** 7346 * @brief Report Remote OOB Data 7347 * @param bd_addr 7348 * @param c_192 Simple Pairing Hash C derived from P-192 public key 7349 * @param r_192 Simple Pairing Randomizer derived from P-192 public key 7350 * @param c_256 Simple Pairing Hash C derived from P-256 public key 7351 * @param r_256 Simple Pairing Randomizer derived from P-256 public key 7352 */ 7353 uint8_t gap_ssp_remote_oob_data(const bd_addr_t addr, const uint8_t * c_192, const uint8_t * r_192, const uint8_t * c_256, const uint8_t * r_256){ 7354 hci_connection_t * connection = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 7355 if (connection == NULL) { 7356 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 7357 } 7358 connection->classic_oob_c_192 = c_192; 7359 connection->classic_oob_r_192 = r_192; 7360 7361 // ignore P-256 if not supported by us 7362 if (hci_stack->secure_connections_active){ 7363 connection->classic_oob_c_256 = c_256; 7364 connection->classic_oob_r_256 = r_256; 7365 } 7366 7367 return ERROR_CODE_SUCCESS; 7368 } 7369 /** 7370 * @brief Generate new OOB data 7371 * @note OOB data will be provided in GAP_EVENT_LOCAL_OOB_DATA and be used in future pairing procedures 7372 */ 7373 void gap_ssp_generate_oob_data(void){ 7374 hci_stack->classic_read_local_oob_data = true; 7375 hci_run(); 7376 } 7377 7378 #endif 7379 7380 #ifdef ENABLE_EXPLICIT_LINK_KEY_REPLY 7381 uint8_t gap_send_link_key_response(const bd_addr_t addr, link_key_t link_key, link_key_type_t type){ 7382 hci_connection_t * connection = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 7383 if (connection == NULL) { 7384 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 7385 } 7386 7387 memcpy(connection->link_key, link_key, sizeof(link_key_t)); 7388 connection->link_key_type = type; 7389 7390 return gap_set_auth_flag_and_run(addr, AUTH_FLAG_HANDLE_LINK_KEY_REQUEST); 7391 } 7392 7393 #endif // ENABLE_EXPLICIT_LINK_KEY_REPLY 7394 /** 7395 * @brief Set inquiry mode: standard, with RSSI, with RSSI + Extended Inquiry Results. Has to be called before power on. 7396 * @param inquiry_mode see bluetooth_defines.h 7397 */ 7398 void hci_set_inquiry_mode(inquiry_mode_t inquiry_mode){ 7399 hci_stack->inquiry_mode = inquiry_mode; 7400 } 7401 7402 /** 7403 * @brief Configure Voice Setting for use with SCO data in HSP/HFP 7404 */ 7405 void hci_set_sco_voice_setting(uint16_t voice_setting){ 7406 hci_stack->sco_voice_setting = voice_setting; 7407 } 7408 7409 /** 7410 * @brief Get SCO Voice Setting 7411 * @return current voice setting 7412 */ 7413 uint16_t hci_get_sco_voice_setting(void){ 7414 return hci_stack->sco_voice_setting; 7415 } 7416 7417 static int hci_have_usb_transport(void){ 7418 if (!hci_stack->hci_transport) return 0; 7419 const char * transport_name = hci_stack->hci_transport->name; 7420 if (!transport_name) return 0; 7421 return (transport_name[0] == 'H') && (transport_name[1] == '2'); 7422 } 7423 7424 /** @brief Get SCO packet length for current SCO Voice setting 7425 * @note Using SCO packets of the exact length is required for USB transfer 7426 * @return Length of SCO packets in bytes (not audio frames) 7427 */ 7428 uint16_t hci_get_sco_packet_length(void){ 7429 uint16_t sco_packet_length = 0; 7430 7431 #ifdef ENABLE_SCO_OVER_HCI 7432 // Transparent = mSBC => 1, CVSD with 16-bit samples requires twice as much bytes 7433 int multiplier = ((hci_stack->sco_voice_setting_active & 0x03) == 0x03) ? 1 : 2; 7434 7435 if (hci_have_usb_transport()){ 7436 // see Core Spec for H2 USB Transfer. 7437 // 3 byte SCO header + 24 bytes per connection 7438 int num_sco_connections = btstack_max(1, hci_number_sco_connections()); 7439 sco_packet_length = 3 + 24 * num_sco_connections * multiplier; 7440 } else { 7441 // 3 byte SCO header + SCO packet size over the air (60 bytes) 7442 sco_packet_length = 3 + 60 * multiplier; 7443 // assert that it still fits inside an SCO buffer 7444 if (sco_packet_length > hci_stack->sco_data_packet_length){ 7445 sco_packet_length = 3 + 60; 7446 } 7447 } 7448 #endif 7449 7450 #ifdef HAVE_SCO_TRANSPORT 7451 // Transparent = mSBC => 1, CVSD with 16-bit samples requires twice as much bytes 7452 int multiplier = ((hci_stack->sco_voice_setting_active & 0x03) == 0x03) ? 1 : 2; 7453 sco_packet_length = 3 + 60 * multiplier; 7454 #endif 7455 return sco_packet_length; 7456 } 7457 7458 /** 7459 * @brief Sets the master/slave policy 7460 * @param policy (0: attempt to become master, 1: let connecting device decide) 7461 */ 7462 void hci_set_master_slave_policy(uint8_t policy){ 7463 hci_stack->master_slave_policy = policy; 7464 } 7465 7466 #endif 7467 7468 HCI_STATE hci_get_state(void){ 7469 return hci_stack->state; 7470 } 7471 7472 #ifdef ENABLE_CLASSIC 7473 void gap_register_classic_connection_filter(int (*accept_callback)(bd_addr_t addr, hci_link_type_t link_type)){ 7474 hci_stack->gap_classic_accept_callback = accept_callback; 7475 } 7476 #endif 7477 7478 /** 7479 * @brief Set callback for Bluetooth Hardware Error 7480 */ 7481 void hci_set_hardware_error_callback(void (*fn)(uint8_t error)){ 7482 hci_stack->hardware_error_callback = fn; 7483 } 7484 7485 void hci_disconnect_all(void){ 7486 btstack_linked_list_iterator_t it; 7487 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 7488 while (btstack_linked_list_iterator_has_next(&it)){ 7489 hci_connection_t * con = (hci_connection_t*) btstack_linked_list_iterator_next(&it); 7490 if (con->state == SENT_DISCONNECT) continue; 7491 con->state = SEND_DISCONNECT; 7492 } 7493 hci_run(); 7494 } 7495 7496 uint16_t hci_get_manufacturer(void){ 7497 return hci_stack->manufacturer; 7498 } 7499 7500 #ifdef ENABLE_BLE 7501 static sm_connection_t * sm_get_connection_for_handle(hci_con_handle_t con_handle){ 7502 hci_connection_t * hci_con = hci_connection_for_handle(con_handle); 7503 if (!hci_con) return NULL; 7504 return &hci_con->sm_connection; 7505 } 7506 7507 // extracted from sm.c to allow enabling of l2cap le data channels without adding sm.c to the build 7508 // without sm.c default values from create_connection_for_bd_addr_and_type() resulg in non-encrypted, not-authenticated 7509 #endif 7510 7511 uint8_t gap_encryption_key_size(hci_con_handle_t con_handle){ 7512 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 7513 if (hci_connection == NULL) return 0; 7514 if (hci_is_le_connection(hci_connection)){ 7515 #ifdef ENABLE_BLE 7516 sm_connection_t * sm_conn = &hci_connection->sm_connection; 7517 if (sm_conn->sm_connection_encrypted) { 7518 return sm_conn->sm_actual_encryption_key_size; 7519 } 7520 #endif 7521 } else { 7522 #ifdef ENABLE_CLASSIC 7523 if ((hci_connection->authentication_flags & AUTH_FLAG_CONNECTION_ENCRYPTED)){ 7524 return hci_connection->encryption_key_size; 7525 } 7526 #endif 7527 } 7528 return 0; 7529 } 7530 7531 bool gap_authenticated(hci_con_handle_t con_handle){ 7532 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 7533 if (hci_connection == NULL) return false; 7534 7535 switch (hci_connection->address_type){ 7536 #ifdef ENABLE_BLE 7537 case BD_ADDR_TYPE_LE_PUBLIC: 7538 case BD_ADDR_TYPE_LE_RANDOM: 7539 if (hci_connection->sm_connection.sm_connection_encrypted == 0) return 0; // unencrypted connection cannot be authenticated 7540 return hci_connection->sm_connection.sm_connection_authenticated != 0; 7541 #endif 7542 #ifdef ENABLE_CLASSIC 7543 case BD_ADDR_TYPE_SCO: 7544 case BD_ADDR_TYPE_ACL: 7545 return gap_authenticated_for_link_key_type(hci_connection->link_key_type); 7546 #endif 7547 default: 7548 return false; 7549 } 7550 } 7551 7552 bool gap_secure_connection(hci_con_handle_t con_handle){ 7553 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 7554 if (hci_connection == NULL) return 0; 7555 7556 switch (hci_connection->address_type){ 7557 #ifdef ENABLE_BLE 7558 case BD_ADDR_TYPE_LE_PUBLIC: 7559 case BD_ADDR_TYPE_LE_RANDOM: 7560 if (hci_connection->sm_connection.sm_connection_encrypted == 0) return false; // unencrypted connection cannot be authenticated 7561 return hci_connection->sm_connection.sm_connection_sc != 0; 7562 #endif 7563 #ifdef ENABLE_CLASSIC 7564 case BD_ADDR_TYPE_SCO: 7565 case BD_ADDR_TYPE_ACL: 7566 return gap_secure_connection_for_link_key_type(hci_connection->link_key_type); 7567 #endif 7568 default: 7569 return false; 7570 } 7571 } 7572 7573 bool gap_bonded(hci_con_handle_t con_handle){ 7574 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 7575 if (hci_connection == NULL) return 0; 7576 7577 #ifdef ENABLE_CLASSIC 7578 link_key_t link_key; 7579 link_key_type_t link_key_type; 7580 #endif 7581 switch (hci_connection->address_type){ 7582 #ifdef ENABLE_BLE 7583 case BD_ADDR_TYPE_LE_PUBLIC: 7584 case BD_ADDR_TYPE_LE_RANDOM: 7585 return hci_connection->sm_connection.sm_le_db_index >= 0; 7586 #endif 7587 #ifdef ENABLE_CLASSIC 7588 case BD_ADDR_TYPE_SCO: 7589 case BD_ADDR_TYPE_ACL: 7590 return hci_stack->link_key_db && hci_stack->link_key_db->get_link_key(hci_connection->address, link_key, &link_key_type); 7591 #endif 7592 default: 7593 return false; 7594 } 7595 } 7596 7597 #ifdef ENABLE_BLE 7598 authorization_state_t gap_authorization_state(hci_con_handle_t con_handle){ 7599 sm_connection_t * sm_conn = sm_get_connection_for_handle(con_handle); 7600 if (!sm_conn) return AUTHORIZATION_UNKNOWN; // wrong connection 7601 if (!sm_conn->sm_connection_encrypted) return AUTHORIZATION_UNKNOWN; // unencrypted connection cannot be authorized 7602 if (!sm_conn->sm_connection_authenticated) return AUTHORIZATION_UNKNOWN; // unauthenticatd connection cannot be authorized 7603 return sm_conn->sm_connection_authorization_state; 7604 } 7605 #endif 7606 7607 #ifdef ENABLE_CLASSIC 7608 uint8_t gap_sniff_mode_enter(hci_con_handle_t con_handle, uint16_t sniff_min_interval, uint16_t sniff_max_interval, uint16_t sniff_attempt, uint16_t sniff_timeout){ 7609 hci_connection_t * conn = hci_connection_for_handle(con_handle); 7610 if (!conn) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 7611 conn->sniff_min_interval = sniff_min_interval; 7612 conn->sniff_max_interval = sniff_max_interval; 7613 conn->sniff_attempt = sniff_attempt; 7614 conn->sniff_timeout = sniff_timeout; 7615 hci_run(); 7616 return 0; 7617 } 7618 7619 /** 7620 * @brief Exit Sniff mode 7621 * @param con_handle 7622 @ @return 0 if ok 7623 */ 7624 uint8_t gap_sniff_mode_exit(hci_con_handle_t con_handle){ 7625 hci_connection_t * conn = hci_connection_for_handle(con_handle); 7626 if (!conn) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 7627 conn->sniff_min_interval = 0xffff; 7628 hci_run(); 7629 return 0; 7630 } 7631 7632 uint8_t gap_sniff_subrating_configure(hci_con_handle_t con_handle, uint16_t max_latency, uint16_t min_remote_timeout, uint16_t min_local_timeout){ 7633 hci_connection_t * conn = hci_connection_for_handle(con_handle); 7634 if (!conn) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 7635 conn->sniff_subrating_max_latency = max_latency; 7636 conn->sniff_subrating_min_remote_timeout = min_remote_timeout; 7637 conn->sniff_subrating_min_local_timeout = min_local_timeout; 7638 hci_run(); 7639 return ERROR_CODE_SUCCESS; 7640 } 7641 7642 uint8_t gap_qos_set(hci_con_handle_t con_handle, hci_service_type_t service_type, uint32_t token_rate, uint32_t peak_bandwidth, uint32_t latency, uint32_t delay_variation){ 7643 hci_connection_t * conn = hci_connection_for_handle(con_handle); 7644 if (!conn) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 7645 conn->qos_service_type = service_type; 7646 conn->qos_token_rate = token_rate; 7647 conn->qos_peak_bandwidth = peak_bandwidth; 7648 conn->qos_latency = latency; 7649 conn->qos_delay_variation = delay_variation; 7650 hci_run(); 7651 return ERROR_CODE_SUCCESS; 7652 } 7653 7654 void gap_set_page_scan_activity(uint16_t page_scan_interval, uint16_t page_scan_window){ 7655 hci_stack->new_page_scan_interval = page_scan_interval; 7656 hci_stack->new_page_scan_window = page_scan_window; 7657 hci_stack->gap_tasks_classic |= GAP_TASK_WRITE_PAGE_SCAN_ACTIVITY; 7658 hci_run(); 7659 } 7660 7661 void gap_set_page_scan_type(page_scan_type_t page_scan_type){ 7662 hci_stack->new_page_scan_type = (uint8_t) page_scan_type; 7663 hci_stack->gap_tasks_classic |= GAP_TASK_WRITE_PAGE_SCAN_TYPE; 7664 hci_run(); 7665 } 7666 7667 void gap_set_page_timeout(uint16_t page_timeout){ 7668 hci_stack->page_timeout = page_timeout; 7669 hci_stack->gap_tasks_classic |= GAP_TASK_WRITE_PAGE_TIMEOUT; 7670 hci_run(); 7671 } 7672 7673 #endif 7674 7675 void hci_halting_defer(void){ 7676 if (hci_stack->state != HCI_STATE_HALTING) return; 7677 switch (hci_stack->substate){ 7678 case HCI_HALTING_DISCONNECT_ALL_NO_TIMER: 7679 case HCI_HALTING_CLOSE: 7680 hci_stack->substate = HCI_HALTING_DISCONNECT_ALL_TIMER; 7681 break; 7682 default: 7683 break; 7684 } 7685 } 7686 7687 #ifdef ENABLE_LE_PRIVACY_ADDRESS_RESOLUTION 7688 void hci_load_le_device_db_entry_into_resolving_list(uint16_t le_device_db_index){ 7689 if (le_device_db_index >= MAX_NUM_RESOLVING_LIST_ENTRIES) return; 7690 if (le_device_db_index >= le_device_db_max_count()) return; 7691 uint8_t offset = le_device_db_index >> 3; 7692 uint8_t mask = 1 << (le_device_db_index & 7); 7693 hci_stack->le_resolving_list_add_entries[offset] |= mask; 7694 if (hci_stack->le_resolving_list_state == LE_RESOLVING_LIST_DONE){ 7695 // note: go back to remove entries, otherwise, a remove + add will skip the add 7696 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_REMOVE_ENTRIES; 7697 } 7698 } 7699 7700 void hci_remove_le_device_db_entry_from_resolving_list(uint16_t le_device_db_index){ 7701 if (le_device_db_index >= MAX_NUM_RESOLVING_LIST_ENTRIES) return; 7702 if (le_device_db_index >= le_device_db_max_count()) return; 7703 uint8_t offset = le_device_db_index >> 3; 7704 uint8_t mask = 1 << (le_device_db_index & 7); 7705 hci_stack->le_resolving_list_remove_entries[offset] |= mask; 7706 if (hci_stack->le_resolving_list_state == LE_RESOLVING_LIST_DONE){ 7707 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_REMOVE_ENTRIES; 7708 } 7709 } 7710 7711 uint8_t gap_load_resolving_list_from_le_device_db(void){ 7712 if (hci_command_supported(SUPPORTED_HCI_COMMAND_LE_SET_ADDRESS_RESOLUTION_ENABLE) == false){ 7713 return ERROR_CODE_UNSUPPORTED_FEATURE_OR_PARAMETER_VALUE; 7714 } 7715 if (hci_stack->le_resolving_list_state != LE_RESOLVING_LIST_SEND_ENABLE_ADDRESS_RESOLUTION){ 7716 // restart le resolving list update 7717 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_READ_SIZE; 7718 } 7719 return ERROR_CODE_SUCCESS; 7720 } 7721 #endif 7722 7723 #ifdef FUZZING_BUILD_MODE_UNSAFE_FOR_PRODUCTION 7724 void hci_setup_test_connections_fuzz(void){ 7725 hci_connection_t * conn; 7726 7727 // default address: 66:55:44:33:00:01 7728 bd_addr_t addr = { 0x66, 0x55, 0x44, 0x33, 0x00, 0x00}; 7729 7730 // setup Controller info 7731 hci_stack->num_cmd_packets = 255; 7732 hci_stack->acl_packets_total_num = 255; 7733 7734 // setup incoming Classic ACL connection with con handle 0x0001, 66:55:44:33:22:01 7735 addr[5] = 0x01; 7736 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 7737 conn->con_handle = addr[5]; 7738 conn->role = HCI_ROLE_SLAVE; 7739 conn->state = RECEIVED_CONNECTION_REQUEST; 7740 conn->sm_connection.sm_role = HCI_ROLE_SLAVE; 7741 7742 // setup incoming Classic SCO connection with con handle 0x0002 7743 addr[5] = 0x02; 7744 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_SCO); 7745 conn->con_handle = addr[5]; 7746 conn->role = HCI_ROLE_SLAVE; 7747 conn->state = RECEIVED_CONNECTION_REQUEST; 7748 conn->sm_connection.sm_role = HCI_ROLE_SLAVE; 7749 7750 // setup ready Classic ACL connection with con handle 0x0003 7751 addr[5] = 0x03; 7752 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 7753 conn->con_handle = addr[5]; 7754 conn->role = HCI_ROLE_SLAVE; 7755 conn->state = OPEN; 7756 conn->sm_connection.sm_role = HCI_ROLE_SLAVE; 7757 7758 // setup ready Classic SCO connection with con handle 0x0004 7759 addr[5] = 0x04; 7760 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_SCO); 7761 conn->con_handle = addr[5]; 7762 conn->role = HCI_ROLE_SLAVE; 7763 conn->state = OPEN; 7764 conn->sm_connection.sm_role = HCI_ROLE_SLAVE; 7765 7766 // setup ready LE ACL connection with con handle 0x005 and public address 7767 addr[5] = 0x05; 7768 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_LE_PUBLIC); 7769 conn->con_handle = addr[5]; 7770 conn->role = HCI_ROLE_SLAVE; 7771 conn->state = OPEN; 7772 conn->sm_connection.sm_role = HCI_ROLE_SLAVE; 7773 conn->sm_connection.sm_connection_encrypted = 1; 7774 } 7775 7776 void hci_free_connections_fuzz(void){ 7777 btstack_linked_list_iterator_t it; 7778 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 7779 while (btstack_linked_list_iterator_has_next(&it)){ 7780 hci_connection_t * con = (hci_connection_t*) btstack_linked_list_iterator_next(&it); 7781 btstack_linked_list_iterator_remove(&it); 7782 btstack_memory_hci_connection_free(con); 7783 } 7784 } 7785 void hci_simulate_working_fuzz(void){ 7786 hci_stack->le_scanning_param_update = false; 7787 hci_init_done(); 7788 hci_stack->num_cmd_packets = 255; 7789 } 7790 #endif 7791