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_SET_ADDRESS_RESOLUTION_ENABLE , 35, 1) \ 154 X( SUPPORTED_HCI_COMMAND_LE_READ_MAXIMUM_DATA_LENGTH , 35, 3) \ 155 X( SUPPORTED_HCI_COMMAND_LE_SET_DEFAULT_PHY , 35, 5) \ 156 X( SUPPORTED_HCI_COMMAND_LE_SET_EXTENDED_ADVERTISING_ENABLE , 36, 6) \ 157 X( SUPPORTED_HCI_COMMAND_LE_READ_BUFFER_SIZE_V2 , 41, 5) \ 158 X( SUPPORTED_HCI_COMMAND_SET_MIN_ENCRYPTION_KEY_SIZE , 45, 7) \ 159 160 // enumerate supported commands 161 #define X(name, offset, bit) name, 162 enum { 163 SUPPORTED_HCI_COMMANDS 164 SUPPORTED_HCI_COMMANDS_COUNT 165 }; 166 #undef X 167 168 // assert supported hci commands bitmap fits into provided storage 169 #if SUPPORTED_HCI_COMMANDS_COUNT > 16 170 #error "Storage for supported HCI commands too small" 171 #endif 172 173 // prototypes 174 #ifdef ENABLE_CLASSIC 175 static void hci_update_scan_enable(void); 176 static void hci_emit_discoverable_enabled(uint8_t enabled); 177 static int hci_local_ssp_activated(void); 178 static bool hci_remote_ssp_supported(hci_con_handle_t con_handle); 179 static bool hci_ssp_supported(hci_connection_t * connection); 180 static void hci_notify_if_sco_can_send_now(void); 181 static void hci_emit_connection_complete(bd_addr_t address, hci_con_handle_t con_handle, uint8_t status); 182 static gap_security_level_t gap_security_level_for_connection(hci_connection_t * connection); 183 static void hci_emit_security_level(hci_con_handle_t con_handle, gap_security_level_t level); 184 static void hci_connection_timeout_handler(btstack_timer_source_t *timer); 185 static void hci_connection_timestamp(hci_connection_t *connection); 186 static void hci_emit_l2cap_check_timeout(hci_connection_t *conn); 187 static void gap_inquiry_explode(uint8_t *packet, uint16_t size); 188 #endif 189 190 static int hci_power_control_on(void); 191 static void hci_power_control_off(void); 192 static void hci_state_reset(void); 193 static void hci_halting_timeout_handler(btstack_timer_source_t * ds); 194 static void hci_emit_transport_packet_sent(void); 195 static void hci_emit_disconnection_complete(hci_con_handle_t con_handle, uint8_t reason); 196 static void hci_emit_nr_connections_changed(void); 197 static void hci_emit_hci_open_failed(void); 198 static void hci_emit_dedicated_bonding_result(bd_addr_t address, uint8_t status); 199 static void hci_emit_event(uint8_t * event, uint16_t size, int dump); 200 static void hci_emit_acl_packet(uint8_t * packet, uint16_t size); 201 static void hci_run(void); 202 static int hci_is_le_connection(hci_connection_t * connection); 203 204 #ifdef ENABLE_CLASSIC 205 static int hci_have_usb_transport(void); 206 static void hci_trigger_remote_features_for_connection(hci_connection_t * connection); 207 #endif 208 209 #ifdef ENABLE_BLE 210 #ifdef ENABLE_LE_CENTRAL 211 // called from test/ble_client/advertising_data_parser.c 212 void le_handle_advertisement_report(uint8_t *packet, uint16_t size); 213 static uint8_t hci_whitelist_remove(bd_addr_type_t address_type, const bd_addr_t address); 214 static void hci_whitelist_free(void); 215 static hci_connection_t * gap_get_outgoing_connection(void); 216 static void hci_le_scan_stop(void); 217 static bool hci_run_general_gap_le(void); 218 #endif 219 #ifdef ENABLE_LE_PERIPHERAL 220 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 221 static le_advertising_set_t * hci_advertising_set_for_handle(uint8_t advertising_handle); 222 #endif /* ENABLE_LE_EXTENDED_ADVERTISING */ 223 #endif /* ENABLE_LE_PERIPHERAL */ 224 #endif /* ENABLE_BLE */ 225 226 // the STACK is here 227 #ifndef HAVE_MALLOC 228 static hci_stack_t hci_stack_static; 229 #endif 230 static hci_stack_t * hci_stack = NULL; 231 232 #ifdef ENABLE_CLASSIC 233 // default name 234 static const char * default_classic_name = "BTstack 00:00:00:00:00:00"; 235 236 // test helper 237 static uint8_t disable_l2cap_timeouts = 0; 238 #endif 239 240 // reset connection state on create and on reconnect 241 // don't overwrite addr, con handle, role 242 static void hci_connection_init(hci_connection_t * conn){ 243 conn->authentication_flags = AUTH_FLAG_NONE; 244 conn->bonding_flags = 0; 245 conn->requested_security_level = LEVEL_0; 246 #ifdef ENABLE_CLASSIC 247 conn->request_role = HCI_ROLE_INVALID; 248 conn->sniff_subrating_max_latency = 0xffff; 249 conn->qos_service_type = HCI_SERVICE_TYPE_INVALID; 250 conn->link_key_type = INVALID_LINK_KEY; 251 btstack_run_loop_set_timer_handler(&conn->timeout, hci_connection_timeout_handler); 252 btstack_run_loop_set_timer_context(&conn->timeout, conn); 253 hci_connection_timestamp(conn); 254 #endif 255 conn->acl_recombination_length = 0; 256 conn->acl_recombination_pos = 0; 257 conn->num_packets_sent = 0; 258 259 conn->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NONE; 260 #ifdef ENABLE_BLE 261 conn->le_phy_update_all_phys = 0xff; 262 #endif 263 #ifdef ENABLE_LE_LIMIT_ACL_FRAGMENT_BY_MAX_OCTETS 264 conn->le_max_tx_octets = 27; 265 #endif 266 #ifdef ENABLE_CLASSIC_PAIRING_OOB 267 conn->classic_oob_c_192 = NULL; 268 conn->classic_oob_r_192 = NULL; 269 conn->classic_oob_c_256 = NULL; 270 conn->classic_oob_r_256 = NULL; 271 #endif 272 } 273 274 /** 275 * create connection for given address 276 * 277 * @return connection OR NULL, if no memory left 278 */ 279 static hci_connection_t * create_connection_for_bd_addr_and_type(const bd_addr_t addr, bd_addr_type_t addr_type){ 280 log_info("create_connection_for_addr %s, type %x", bd_addr_to_str(addr), addr_type); 281 282 hci_connection_t * conn = btstack_memory_hci_connection_get(); 283 if (!conn) return NULL; 284 hci_connection_init(conn); 285 286 bd_addr_copy(conn->address, addr); 287 conn->address_type = addr_type; 288 conn->con_handle = HCI_CON_HANDLE_INVALID; 289 conn->role = HCI_ROLE_INVALID; 290 291 btstack_linked_list_add(&hci_stack->connections, (btstack_linked_item_t *) conn); 292 293 return conn; 294 } 295 296 297 /** 298 * get le connection parameter range 299 * 300 * @return le connection parameter range struct 301 */ 302 void gap_get_connection_parameter_range(le_connection_parameter_range_t * range){ 303 *range = hci_stack->le_connection_parameter_range; 304 } 305 306 /** 307 * set le connection parameter range 308 * 309 */ 310 311 void gap_set_connection_parameter_range(le_connection_parameter_range_t *range){ 312 hci_stack->le_connection_parameter_range = *range; 313 } 314 315 /** 316 * @brief Test if connection parameters are inside in existing rage 317 * @param conn_interval_min (unit: 1.25ms) 318 * @param conn_interval_max (unit: 1.25ms) 319 * @param conn_latency 320 * @param supervision_timeout (unit: 10ms) 321 * @return 1 if included 322 */ 323 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){ 324 if (le_conn_interval_min < existing_range->le_conn_interval_min) return 0; 325 if (le_conn_interval_max > existing_range->le_conn_interval_max) return 0; 326 327 if (le_conn_latency < existing_range->le_conn_latency_min) return 0; 328 if (le_conn_latency > existing_range->le_conn_latency_max) return 0; 329 330 if (le_supervision_timeout < existing_range->le_supervision_timeout_min) return 0; 331 if (le_supervision_timeout > existing_range->le_supervision_timeout_max) return 0; 332 333 return 1; 334 } 335 336 /** 337 * @brief Set max number of connections in LE Peripheral role (if Bluetooth Controller supports it) 338 * @note: default: 1 339 * @param max_peripheral_connections 340 */ 341 #ifdef ENABLE_LE_PERIPHERAL 342 void gap_set_max_number_peripheral_connections(int max_peripheral_connections){ 343 hci_stack->le_max_number_peripheral_connections = max_peripheral_connections; 344 } 345 #endif 346 347 /** 348 * get hci connections iterator 349 * 350 * @return hci connections iterator 351 */ 352 353 void hci_connections_get_iterator(btstack_linked_list_iterator_t *it){ 354 btstack_linked_list_iterator_init(it, &hci_stack->connections); 355 } 356 357 /** 358 * get connection for a given handle 359 * 360 * @return connection OR NULL, if not found 361 */ 362 hci_connection_t * hci_connection_for_handle(hci_con_handle_t con_handle){ 363 btstack_linked_list_iterator_t it; 364 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 365 while (btstack_linked_list_iterator_has_next(&it)){ 366 hci_connection_t * item = (hci_connection_t *) btstack_linked_list_iterator_next(&it); 367 if ( item->con_handle == con_handle ) { 368 return item; 369 } 370 } 371 return NULL; 372 } 373 374 /** 375 * get connection for given address 376 * 377 * @return connection OR NULL, if not found 378 */ 379 hci_connection_t * hci_connection_for_bd_addr_and_type(const bd_addr_t addr, bd_addr_type_t addr_type){ 380 btstack_linked_list_iterator_t it; 381 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 382 while (btstack_linked_list_iterator_has_next(&it)){ 383 hci_connection_t * connection = (hci_connection_t *) btstack_linked_list_iterator_next(&it); 384 if (connection->address_type != addr_type) continue; 385 if (memcmp(addr, connection->address, 6) != 0) continue; 386 return connection; 387 } 388 return NULL; 389 } 390 391 #ifdef ENABLE_CLASSIC 392 393 inline static void connectionClearAuthenticationFlags(hci_connection_t * conn, hci_authentication_flags_t flags){ 394 conn->authentication_flags = (hci_authentication_flags_t)(conn->authentication_flags & ~flags); 395 } 396 397 inline static void connectionSetAuthenticationFlags(hci_connection_t * conn, hci_authentication_flags_t flags){ 398 conn->authentication_flags = (hci_authentication_flags_t)(conn->authentication_flags | flags); 399 } 400 401 #ifdef ENABLE_SCO_OVER_HCI 402 static int hci_number_sco_connections(void){ 403 int connections = 0; 404 btstack_linked_list_iterator_t it; 405 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 406 while (btstack_linked_list_iterator_has_next(&it)){ 407 hci_connection_t * connection = (hci_connection_t *) btstack_linked_list_iterator_next(&it); 408 if (connection->address_type != BD_ADDR_TYPE_SCO) continue; 409 connections++; 410 } 411 return connections; 412 } 413 #endif 414 415 static void hci_connection_timeout_handler(btstack_timer_source_t *timer){ 416 hci_connection_t * connection = (hci_connection_t *) btstack_run_loop_get_timer_context(timer); 417 #ifdef HAVE_EMBEDDED_TICK 418 if (btstack_run_loop_embedded_get_ticks() > connection->timestamp + btstack_run_loop_embedded_ticks_for_ms(HCI_CONNECTION_TIMEOUT_MS)){ 419 // connections might be timed out 420 hci_emit_l2cap_check_timeout(connection); 421 } 422 #else 423 if (btstack_run_loop_get_time_ms() > (connection->timestamp + HCI_CONNECTION_TIMEOUT_MS)){ 424 // connections might be timed out 425 hci_emit_l2cap_check_timeout(connection); 426 } 427 #endif 428 } 429 430 static void hci_connection_timestamp(hci_connection_t *connection){ 431 #ifdef HAVE_EMBEDDED_TICK 432 connection->timestamp = btstack_run_loop_embedded_get_ticks(); 433 #else 434 connection->timestamp = btstack_run_loop_get_time_ms(); 435 #endif 436 } 437 438 /** 439 * add authentication flags and reset timer 440 * @note: assumes classic connection 441 * @note: bd_addr is passed in as litle endian uint8_t * as it is called from parsing packets 442 */ 443 static void hci_add_connection_flags_for_flipped_bd_addr(uint8_t *bd_addr, hci_authentication_flags_t flags){ 444 bd_addr_t addr; 445 reverse_bd_addr(bd_addr, addr); 446 hci_connection_t * conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 447 if (conn) { 448 connectionSetAuthenticationFlags(conn, flags); 449 hci_connection_timestamp(conn); 450 } 451 } 452 453 static bool hci_pairing_active(hci_connection_t * hci_connection){ 454 return (hci_connection->authentication_flags & AUTH_FLAG_PAIRING_ACTIVE_MASK) != 0; 455 } 456 457 static void hci_pairing_started(hci_connection_t * hci_connection, bool ssp){ 458 if (hci_pairing_active(hci_connection)) return; 459 if (ssp){ 460 hci_connection->authentication_flags |= AUTH_FLAG_SSP_PAIRING_ACTIVE; 461 } else { 462 hci_connection->authentication_flags |= AUTH_FLAG_LEGACY_PAIRING_ACTIVE; 463 } 464 // if we are initiator, we have sent an HCI Authenticate Request 465 bool initiator = (hci_connection->bonding_flags & BONDING_SENT_AUTHENTICATE_REQUEST) != 0; 466 467 // if we are responder, use minimal service security level as required level 468 if (!initiator){ 469 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); 470 } 471 472 log_info("pairing started, ssp %u, initiator %u, requested level %u", (int) ssp, (int) initiator, hci_connection->requested_security_level); 473 474 uint8_t event[12]; 475 event[0] = GAP_EVENT_PAIRING_STARTED; 476 event[1] = 10; 477 little_endian_store_16(event, 2, (uint16_t) hci_connection->con_handle); 478 reverse_bd_addr(hci_connection->address, &event[4]); 479 event[10] = (uint8_t) ssp; 480 event[11] = (uint8_t) initiator; 481 hci_emit_event(event, sizeof(event), 1); 482 } 483 484 static void hci_pairing_complete(hci_connection_t * hci_connection, uint8_t status){ 485 hci_connection->requested_security_level = LEVEL_0; 486 if (!hci_pairing_active(hci_connection)) return; 487 hci_connection->authentication_flags &= ~AUTH_FLAG_PAIRING_ACTIVE_MASK; 488 #ifdef ENABLE_CLASSIC_PAIRING_OOB 489 hci_connection->classic_oob_c_192 = NULL; 490 hci_connection->classic_oob_r_192 = NULL; 491 hci_connection->classic_oob_c_256 = NULL; 492 hci_connection->classic_oob_r_256 = NULL; 493 #endif 494 log_info("pairing complete, status %02x", status); 495 496 uint8_t event[11]; 497 event[0] = GAP_EVENT_PAIRING_COMPLETE; 498 event[1] = 9; 499 little_endian_store_16(event, 2, (uint16_t) hci_connection->con_handle); 500 reverse_bd_addr(hci_connection->address, &event[4]); 501 event[10] = status; 502 hci_emit_event(event, sizeof(event), 1); 503 } 504 505 bool hci_authentication_active_for_handle(hci_con_handle_t handle){ 506 hci_connection_t * conn = hci_connection_for_handle(handle); 507 if (!conn) return false; 508 return hci_pairing_active(conn); 509 } 510 511 void gap_drop_link_key_for_bd_addr(bd_addr_t addr){ 512 if (!hci_stack->link_key_db) return; 513 log_info("gap_drop_link_key_for_bd_addr: %s", bd_addr_to_str(addr)); 514 hci_stack->link_key_db->delete_link_key(addr); 515 } 516 517 void gap_store_link_key_for_bd_addr(bd_addr_t addr, link_key_t link_key, link_key_type_t type){ 518 if (!hci_stack->link_key_db) return; 519 log_info("gap_store_link_key_for_bd_addr: %s, type %u", bd_addr_to_str(addr), type); 520 hci_stack->link_key_db->put_link_key(addr, link_key, type); 521 } 522 523 bool gap_get_link_key_for_bd_addr(bd_addr_t addr, link_key_t link_key, link_key_type_t * type){ 524 if (!hci_stack->link_key_db) return false; 525 int result = hci_stack->link_key_db->get_link_key(addr, link_key, type) != 0; 526 log_info("link key for %s available %u, type %u", bd_addr_to_str(addr), result, (int) *type); 527 return result; 528 } 529 530 void gap_delete_all_link_keys(void){ 531 bd_addr_t addr; 532 link_key_t link_key; 533 link_key_type_t type; 534 btstack_link_key_iterator_t it; 535 int ok = gap_link_key_iterator_init(&it); 536 if (!ok) { 537 log_error("could not initialize iterator"); 538 return; 539 } 540 while (gap_link_key_iterator_get_next(&it, addr, link_key, &type)){ 541 gap_drop_link_key_for_bd_addr(addr); 542 } 543 gap_link_key_iterator_done(&it); 544 } 545 546 int gap_link_key_iterator_init(btstack_link_key_iterator_t * it){ 547 if (!hci_stack->link_key_db) return 0; 548 if (!hci_stack->link_key_db->iterator_init) return 0; 549 return hci_stack->link_key_db->iterator_init(it); 550 } 551 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){ 552 if (!hci_stack->link_key_db) return 0; 553 return hci_stack->link_key_db->iterator_get_next(it, bd_addr, link_key, type); 554 } 555 void gap_link_key_iterator_done(btstack_link_key_iterator_t * it){ 556 if (!hci_stack->link_key_db) return; 557 hci_stack->link_key_db->iterator_done(it); 558 } 559 #endif 560 561 static bool hci_is_le_connection_type(bd_addr_type_t address_type){ 562 switch (address_type){ 563 case BD_ADDR_TYPE_LE_PUBLIC: 564 case BD_ADDR_TYPE_LE_RANDOM: 565 case BD_ADDR_TYPE_LE_PRIVAT_FALLBACK_PUBLIC: 566 case BD_ADDR_TYPE_LE_PRIVAT_FALLBACK_RANDOM: 567 return true; 568 default: 569 return false; 570 } 571 } 572 573 static int hci_is_le_connection(hci_connection_t * connection){ 574 return hci_is_le_connection_type(connection->address_type); 575 } 576 577 /** 578 * count connections 579 */ 580 static int nr_hci_connections(void){ 581 int count = 0; 582 btstack_linked_item_t *it; 583 for (it = (btstack_linked_item_t *) hci_stack->connections; it != NULL ; it = it->next){ 584 count++; 585 } 586 return count; 587 } 588 589 uint16_t hci_number_free_acl_slots_for_connection_type(bd_addr_type_t address_type){ 590 591 unsigned int num_packets_sent_classic = 0; 592 unsigned int num_packets_sent_le = 0; 593 594 btstack_linked_item_t *it; 595 for (it = (btstack_linked_item_t *) hci_stack->connections; it != NULL; it = it->next){ 596 hci_connection_t * connection = (hci_connection_t *) it; 597 if (hci_is_le_connection(connection)){ 598 num_packets_sent_le += connection->num_packets_sent; 599 } 600 if (connection->address_type == BD_ADDR_TYPE_ACL){ 601 num_packets_sent_classic += connection->num_packets_sent; 602 } 603 } 604 log_debug("ACL classic buffers: %u used of %u", num_packets_sent_classic, hci_stack->acl_packets_total_num); 605 int free_slots_classic = hci_stack->acl_packets_total_num - num_packets_sent_classic; 606 int free_slots_le = 0; 607 608 if (free_slots_classic < 0){ 609 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); 610 return 0; 611 } 612 613 if (hci_stack->le_acl_packets_total_num){ 614 // if we have LE slots, they are used 615 free_slots_le = hci_stack->le_acl_packets_total_num - num_packets_sent_le; 616 if (free_slots_le < 0){ 617 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); 618 return 0; 619 } 620 } else { 621 // otherwise, classic slots are used for LE, too 622 free_slots_classic -= num_packets_sent_le; 623 if (free_slots_classic < 0){ 624 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); 625 return 0; 626 } 627 } 628 629 switch (address_type){ 630 case BD_ADDR_TYPE_UNKNOWN: 631 log_error("hci_number_free_acl_slots: unknown address type"); 632 return 0; 633 634 case BD_ADDR_TYPE_ACL: 635 return (uint16_t) free_slots_classic; 636 637 default: 638 if (hci_stack->le_acl_packets_total_num > 0){ 639 return (uint16_t) free_slots_le; 640 } 641 return (uint16_t) free_slots_classic; 642 } 643 } 644 645 int hci_number_free_acl_slots_for_handle(hci_con_handle_t con_handle){ 646 // get connection type 647 hci_connection_t * connection = hci_connection_for_handle(con_handle); 648 if (!connection){ 649 log_error("hci_number_free_acl_slots: handle 0x%04x not in connection list", con_handle); 650 return 0; 651 } 652 return hci_number_free_acl_slots_for_connection_type(connection->address_type); 653 } 654 655 #ifdef ENABLE_CLASSIC 656 static int hci_number_free_sco_slots(void){ 657 unsigned int num_sco_packets_sent = 0; 658 btstack_linked_item_t *it; 659 if (hci_stack->synchronous_flow_control_enabled){ 660 // explicit flow control 661 for (it = (btstack_linked_item_t *) hci_stack->connections; it ; it = it->next){ 662 hci_connection_t * connection = (hci_connection_t *) it; 663 if (connection->address_type != BD_ADDR_TYPE_SCO) continue; 664 num_sco_packets_sent += connection->num_packets_sent; 665 } 666 if (num_sco_packets_sent > hci_stack->sco_packets_total_num){ 667 log_info("hci_number_free_sco_slots:packets (%u) > total packets (%u)", num_sco_packets_sent, hci_stack->sco_packets_total_num); 668 return 0; 669 } 670 return hci_stack->sco_packets_total_num - num_sco_packets_sent; 671 } else { 672 // implicit flow control -- TODO 673 int num_ready = 0; 674 for (it = (btstack_linked_item_t *) hci_stack->connections; it ; it = it->next){ 675 hci_connection_t * connection = (hci_connection_t *) it; 676 if (connection->address_type != BD_ADDR_TYPE_SCO) continue; 677 if (connection->sco_tx_ready == 0) continue; 678 num_ready++; 679 } 680 return num_ready; 681 } 682 } 683 #endif 684 685 // only used to send HCI Host Number Completed Packets 686 static int hci_can_send_comand_packet_transport(void){ 687 if (hci_stack->hci_packet_buffer_reserved) return 0; 688 689 // check for async hci transport implementations 690 if (hci_stack->hci_transport->can_send_packet_now){ 691 if (!hci_stack->hci_transport->can_send_packet_now(HCI_COMMAND_DATA_PACKET)){ 692 return 0; 693 } 694 } 695 return 1; 696 } 697 698 // new functions replacing hci_can_send_packet_now[_using_packet_buffer] 699 bool hci_can_send_command_packet_now(void){ 700 if (hci_can_send_comand_packet_transport() == 0) return false; 701 return hci_stack->num_cmd_packets > 0u; 702 } 703 704 static int hci_transport_can_send_prepared_packet_now(uint8_t packet_type){ 705 // check for async hci transport implementations 706 if (!hci_stack->hci_transport->can_send_packet_now) return true; 707 return hci_stack->hci_transport->can_send_packet_now(packet_type); 708 } 709 710 static bool hci_can_send_prepared_acl_packet_for_address_type(bd_addr_type_t address_type){ 711 if (!hci_transport_can_send_prepared_packet_now(HCI_ACL_DATA_PACKET)) return false; 712 return hci_number_free_acl_slots_for_connection_type(address_type) > 0; 713 } 714 715 bool hci_can_send_acl_le_packet_now(void){ 716 if (hci_stack->hci_packet_buffer_reserved) return false; 717 return hci_can_send_prepared_acl_packet_for_address_type(BD_ADDR_TYPE_LE_PUBLIC); 718 } 719 720 bool hci_can_send_prepared_acl_packet_now(hci_con_handle_t con_handle) { 721 if (!hci_transport_can_send_prepared_packet_now(HCI_ACL_DATA_PACKET)) return false; 722 return hci_number_free_acl_slots_for_handle(con_handle) > 0; 723 } 724 725 bool hci_can_send_acl_packet_now(hci_con_handle_t con_handle){ 726 if (hci_stack->hci_packet_buffer_reserved) return false; 727 return hci_can_send_prepared_acl_packet_now(con_handle); 728 } 729 730 #ifdef ENABLE_CLASSIC 731 bool hci_can_send_acl_classic_packet_now(void){ 732 if (hci_stack->hci_packet_buffer_reserved) return false; 733 return hci_can_send_prepared_acl_packet_for_address_type(BD_ADDR_TYPE_ACL); 734 } 735 736 bool hci_can_send_prepared_sco_packet_now(void){ 737 if (!hci_transport_can_send_prepared_packet_now(HCI_SCO_DATA_PACKET)) return false; 738 if (hci_have_usb_transport()){ 739 return hci_stack->sco_can_send_now; 740 } else { 741 return hci_number_free_sco_slots() > 0; 742 } 743 } 744 745 bool hci_can_send_sco_packet_now(void){ 746 if (hci_stack->hci_packet_buffer_reserved) return false; 747 return hci_can_send_prepared_sco_packet_now(); 748 } 749 750 void hci_request_sco_can_send_now_event(void){ 751 hci_stack->sco_waiting_for_can_send_now = 1; 752 hci_notify_if_sco_can_send_now(); 753 } 754 #endif 755 756 // used for internal checks in l2cap.c 757 bool hci_is_packet_buffer_reserved(void){ 758 return hci_stack->hci_packet_buffer_reserved; 759 } 760 761 // reserves outgoing packet buffer. 762 // @return 1 if successful 763 bool hci_reserve_packet_buffer(void){ 764 if (hci_stack->hci_packet_buffer_reserved) { 765 log_error("hci_reserve_packet_buffer called but buffer already reserved"); 766 return false; 767 } 768 hci_stack->hci_packet_buffer_reserved = true; 769 return true; 770 } 771 772 void hci_release_packet_buffer(void){ 773 hci_stack->hci_packet_buffer_reserved = false; 774 } 775 776 // assumption: synchronous implementations don't provide can_send_packet_now as they don't keep the buffer after the call 777 static int hci_transport_synchronous(void){ 778 return hci_stack->hci_transport->can_send_packet_now == NULL; 779 } 780 781 static uint8_t hci_send_acl_packet_fragments(hci_connection_t *connection){ 782 783 // 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); 784 785 // max ACL data packet length depends on connection type (LE vs. Classic) and available buffers 786 uint16_t max_acl_data_packet_length = hci_stack->acl_data_packet_length; 787 if (hci_is_le_connection(connection) && (hci_stack->le_data_packets_length > 0u)){ 788 max_acl_data_packet_length = hci_stack->le_data_packets_length; 789 } 790 791 #ifdef ENABLE_LE_LIMIT_ACL_FRAGMENT_BY_MAX_OCTETS 792 if (hci_is_le_connection(connection) && (connection->le_max_tx_octets < max_acl_data_packet_length)){ 793 max_acl_data_packet_length = connection->le_max_tx_octets; 794 } 795 #endif 796 797 log_debug("hci_send_acl_packet_fragments entered"); 798 799 uint8_t status = ERROR_CODE_SUCCESS; 800 // multiple packets could be send on a synchronous HCI transport 801 while (true){ 802 803 log_debug("hci_send_acl_packet_fragments loop entered"); 804 805 // get current data 806 const uint16_t acl_header_pos = hci_stack->acl_fragmentation_pos - 4u; 807 int current_acl_data_packet_length = hci_stack->acl_fragmentation_total_size - hci_stack->acl_fragmentation_pos; 808 bool more_fragments = false; 809 810 // if ACL packet is larger than Bluetooth packet buffer, only send max_acl_data_packet_length 811 if (current_acl_data_packet_length > max_acl_data_packet_length){ 812 more_fragments = true; 813 current_acl_data_packet_length = max_acl_data_packet_length; 814 } 815 816 // copy handle_and_flags if not first fragment and update packet boundary flags to be 01 (continuing fragmnent) 817 if (acl_header_pos > 0u){ 818 uint16_t handle_and_flags = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 819 handle_and_flags = (handle_and_flags & 0xcfffu) | (1u << 12u); 820 little_endian_store_16(hci_stack->hci_packet_buffer, acl_header_pos, handle_and_flags); 821 } 822 823 // update header len 824 little_endian_store_16(hci_stack->hci_packet_buffer, acl_header_pos + 2u, current_acl_data_packet_length); 825 826 // count packet 827 connection->num_packets_sent++; 828 log_debug("hci_send_acl_packet_fragments loop before send (more fragments %d)", (int) more_fragments); 829 830 // update state for next fragment (if any) as "transport done" might be sent during send_packet already 831 if (more_fragments){ 832 // update start of next fragment to send 833 hci_stack->acl_fragmentation_pos += current_acl_data_packet_length; 834 } else { 835 // done 836 hci_stack->acl_fragmentation_pos = 0; 837 hci_stack->acl_fragmentation_total_size = 0; 838 } 839 840 // send packet 841 uint8_t * packet = &hci_stack->hci_packet_buffer[acl_header_pos]; 842 const int size = current_acl_data_packet_length + 4; 843 hci_dump_packet(HCI_ACL_DATA_PACKET, 0, packet, size); 844 hci_stack->acl_fragmentation_tx_active = 1; 845 int err = hci_stack->hci_transport->send_packet(HCI_ACL_DATA_PACKET, packet, size); 846 if (err != 0){ 847 // no error from HCI Transport expected 848 status = ERROR_CODE_HARDWARE_FAILURE; 849 } 850 851 log_debug("hci_send_acl_packet_fragments loop after send (more fragments %d)", (int) more_fragments); 852 853 // done yet? 854 if (!more_fragments) break; 855 856 // can send more? 857 if (!hci_can_send_prepared_acl_packet_now(connection->con_handle)) return status; 858 } 859 860 log_debug("hci_send_acl_packet_fragments loop over"); 861 862 // release buffer now for synchronous transport 863 if (hci_transport_synchronous()){ 864 hci_stack->acl_fragmentation_tx_active = 0; 865 hci_release_packet_buffer(); 866 hci_emit_transport_packet_sent(); 867 } 868 869 return status; 870 } 871 872 // pre: caller has reserved the packet buffer 873 uint8_t hci_send_acl_packet_buffer(int size){ 874 btstack_assert(hci_stack->hci_packet_buffer_reserved); 875 876 uint8_t * packet = hci_stack->hci_packet_buffer; 877 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(packet); 878 879 // check for free places on Bluetooth module 880 if (!hci_can_send_prepared_acl_packet_now(con_handle)) { 881 log_error("hci_send_acl_packet_buffer called but no free ACL buffers on controller"); 882 hci_release_packet_buffer(); 883 hci_emit_transport_packet_sent(); 884 return BTSTACK_ACL_BUFFERS_FULL; 885 } 886 887 hci_connection_t *connection = hci_connection_for_handle( con_handle); 888 if (!connection) { 889 log_error("hci_send_acl_packet_buffer called but no connection for handle 0x%04x", con_handle); 890 hci_release_packet_buffer(); 891 hci_emit_transport_packet_sent(); 892 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 893 } 894 895 #ifdef ENABLE_CLASSIC 896 hci_connection_timestamp(connection); 897 #endif 898 899 // hci_dump_packet( HCI_ACL_DATA_PACKET, 0, packet, size); 900 901 // setup data 902 hci_stack->acl_fragmentation_total_size = size; 903 hci_stack->acl_fragmentation_pos = 4; // start of L2CAP packet 904 905 return hci_send_acl_packet_fragments(connection); 906 } 907 908 #ifdef ENABLE_CLASSIC 909 // pre: caller has reserved the packet buffer 910 uint8_t hci_send_sco_packet_buffer(int size){ 911 btstack_assert(hci_stack->hci_packet_buffer_reserved); 912 913 uint8_t * packet = hci_stack->hci_packet_buffer; 914 915 // skip checks in loopback mode 916 if (!hci_stack->loopback_mode){ 917 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(packet); // same for ACL and SCO 918 919 // check for free places on Bluetooth module 920 if (!hci_can_send_prepared_sco_packet_now()) { 921 log_error("hci_send_sco_packet_buffer called but no free SCO buffers on controller"); 922 hci_release_packet_buffer(); 923 hci_emit_transport_packet_sent(); 924 return BTSTACK_ACL_BUFFERS_FULL; 925 } 926 927 // track send packet in connection struct 928 hci_connection_t *connection = hci_connection_for_handle( con_handle); 929 if (!connection) { 930 log_error("hci_send_sco_packet_buffer called but no connection for handle 0x%04x", con_handle); 931 hci_release_packet_buffer(); 932 hci_emit_transport_packet_sent(); 933 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 934 } 935 936 if (hci_have_usb_transport()){ 937 // token used 938 hci_stack->sco_can_send_now = false; 939 } else { 940 if (hci_stack->synchronous_flow_control_enabled){ 941 connection->num_packets_sent++; 942 } else { 943 connection->sco_tx_ready--; 944 } 945 } 946 } 947 948 hci_dump_packet( HCI_SCO_DATA_PACKET, 0, packet, size); 949 950 #ifdef HAVE_SCO_TRANSPORT 951 hci_stack->sco_transport->send_packet(packet, size); 952 hci_release_packet_buffer(); 953 hci_emit_transport_packet_sent(); 954 955 return 0; 956 #else 957 int err = hci_stack->hci_transport->send_packet(HCI_SCO_DATA_PACKET, packet, size); 958 if (hci_transport_synchronous()){ 959 hci_release_packet_buffer(); 960 hci_emit_transport_packet_sent(); 961 } 962 963 if (err != 0){ 964 return ERROR_CODE_HARDWARE_FAILURE; 965 } 966 return ERROR_CODE_SUCCESS; 967 #endif 968 } 969 #endif 970 971 static void acl_handler(uint8_t *packet, uint16_t size){ 972 973 // get info 974 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(packet); 975 hci_connection_t *conn = hci_connection_for_handle(con_handle); 976 uint8_t acl_flags = READ_ACL_FLAGS(packet); 977 uint16_t acl_length = READ_ACL_LENGTH(packet); 978 979 // ignore non-registered handle 980 if (!conn){ 981 log_error("acl_handler called with non-registered handle %u!" , con_handle); 982 return; 983 } 984 985 // assert packet is complete 986 if ((acl_length + 4u) != size){ 987 log_error("acl_handler called with ACL packet of wrong size %d, expected %u => dropping packet", size, acl_length + 4); 988 return; 989 } 990 991 #ifdef ENABLE_CLASSIC 992 // update idle timestamp 993 hci_connection_timestamp(conn); 994 #endif 995 996 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 997 hci_stack->host_completed_packets = 1; 998 conn->num_packets_completed++; 999 #endif 1000 1001 // handle different packet types 1002 switch (acl_flags & 0x03u) { 1003 1004 case 0x01: // continuation fragment 1005 1006 // sanity checks 1007 if (conn->acl_recombination_pos == 0u) { 1008 log_error( "ACL Cont Fragment but no first fragment for handle 0x%02x", con_handle); 1009 return; 1010 } 1011 if ((conn->acl_recombination_pos + acl_length) > (4u + HCI_ACL_BUFFER_SIZE)){ 1012 log_error( "ACL Cont Fragment to large: combined packet %u > buffer size %u for handle 0x%02x", 1013 conn->acl_recombination_pos + acl_length, 4 + HCI_ACL_BUFFER_SIZE, con_handle); 1014 conn->acl_recombination_pos = 0; 1015 return; 1016 } 1017 1018 // append fragment payload (header already stored) 1019 (void)memcpy(&conn->acl_recombination_buffer[HCI_INCOMING_PRE_BUFFER_SIZE + conn->acl_recombination_pos], 1020 &packet[4], acl_length); 1021 conn->acl_recombination_pos += acl_length; 1022 1023 // forward complete L2CAP packet if complete. 1024 if (conn->acl_recombination_pos >= (conn->acl_recombination_length + 4u + 4u)){ // pos already incl. ACL header 1025 hci_emit_acl_packet(&conn->acl_recombination_buffer[HCI_INCOMING_PRE_BUFFER_SIZE], conn->acl_recombination_pos); 1026 // reset recombination buffer 1027 conn->acl_recombination_length = 0; 1028 conn->acl_recombination_pos = 0; 1029 } 1030 break; 1031 1032 case 0x02: { // first fragment 1033 1034 // sanity check 1035 if (conn->acl_recombination_pos) { 1036 log_error( "ACL First Fragment but data in buffer for handle 0x%02x, dropping stale fragments", con_handle); 1037 conn->acl_recombination_pos = 0; 1038 } 1039 1040 // peek into L2CAP packet! 1041 uint16_t l2cap_length = READ_L2CAP_LENGTH( packet ); 1042 1043 // compare fragment size to L2CAP packet size 1044 if (acl_length >= (l2cap_length + 4u)){ 1045 // forward fragment as L2CAP packet 1046 hci_emit_acl_packet(packet, acl_length + 4u); 1047 } else { 1048 1049 if (acl_length > HCI_ACL_BUFFER_SIZE){ 1050 log_error( "ACL First Fragment to large: fragment %u > buffer size %u for handle 0x%02x", 1051 4 + acl_length, 4 + HCI_ACL_BUFFER_SIZE, con_handle); 1052 return; 1053 } 1054 1055 // store first fragment and tweak acl length for complete package 1056 (void)memcpy(&conn->acl_recombination_buffer[HCI_INCOMING_PRE_BUFFER_SIZE], 1057 packet, acl_length + 4u); 1058 conn->acl_recombination_pos = acl_length + 4u; 1059 conn->acl_recombination_length = l2cap_length; 1060 little_endian_store_16(conn->acl_recombination_buffer, HCI_INCOMING_PRE_BUFFER_SIZE + 2u, l2cap_length +4u); 1061 } 1062 break; 1063 1064 } 1065 default: 1066 log_error( "acl_handler called with invalid packet boundary flags %u", acl_flags & 0x03); 1067 return; 1068 } 1069 1070 // execute main loop 1071 hci_run(); 1072 } 1073 1074 static void hci_connection_stop_timer(hci_connection_t * conn){ 1075 btstack_run_loop_remove_timer(&conn->timeout); 1076 #ifdef ENABLE_CLASSIC 1077 btstack_run_loop_remove_timer(&conn->timeout_sco); 1078 #endif 1079 } 1080 1081 static void hci_shutdown_connection(hci_connection_t *conn){ 1082 log_info("Connection closed: handle 0x%x, %s", conn->con_handle, bd_addr_to_str(conn->address)); 1083 1084 #ifdef ENABLE_CLASSIC 1085 #if defined(ENABLE_SCO_OVER_HCI) || defined(HAVE_SCO_TRANSPORT) 1086 bd_addr_type_t addr_type = conn->address_type; 1087 #endif 1088 #ifdef HAVE_SCO_TRANSPORT 1089 hci_con_handle_t con_handle = conn->con_handle; 1090 #endif 1091 #endif 1092 1093 hci_connection_stop_timer(conn); 1094 1095 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 1096 btstack_memory_hci_connection_free( conn ); 1097 1098 // now it's gone 1099 hci_emit_nr_connections_changed(); 1100 1101 #ifdef ENABLE_CLASSIC 1102 #ifdef ENABLE_SCO_OVER_HCI 1103 // update SCO 1104 if ((addr_type == BD_ADDR_TYPE_SCO) && (hci_stack->hci_transport != NULL) && (hci_stack->hci_transport->set_sco_config != NULL)){ 1105 hci_stack->hci_transport->set_sco_config(hci_stack->sco_voice_setting_active, hci_number_sco_connections()); 1106 } 1107 #endif 1108 #ifdef HAVE_SCO_TRANSPORT 1109 if ((addr_type == BD_ADDR_TYPE_SCO) && (hci_stack->sco_transport != NULL)){ 1110 hci_stack->sco_transport->close(con_handle); 1111 } 1112 #endif 1113 #endif 1114 } 1115 1116 #ifdef ENABLE_CLASSIC 1117 1118 static const uint16_t packet_type_sizes[] = { 1119 0, HCI_ACL_2DH1_SIZE, HCI_ACL_3DH1_SIZE, HCI_ACL_DM1_SIZE, 1120 HCI_ACL_DH1_SIZE, 0, 0, 0, 1121 HCI_ACL_2DH3_SIZE, HCI_ACL_3DH3_SIZE, HCI_ACL_DM3_SIZE, HCI_ACL_DH3_SIZE, 1122 HCI_ACL_2DH5_SIZE, HCI_ACL_3DH5_SIZE, HCI_ACL_DM5_SIZE, HCI_ACL_DH5_SIZE 1123 }; 1124 static const uint8_t packet_type_feature_requirement_bit[] = { 1125 0, // 3 slot packets 1126 1, // 5 slot packets 1127 25, // EDR 2 mpbs 1128 26, // EDR 3 mbps 1129 39, // 3 slot EDR packts 1130 40, // 5 slot EDR packet 1131 }; 1132 static const uint16_t packet_type_feature_packet_mask[] = { 1133 0x0f00, // 3 slot packets 1134 0xf000, // 5 slot packets 1135 0x1102, // EDR 2 mpbs 1136 0x2204, // EDR 3 mbps 1137 0x0300, // 3 slot EDR packts 1138 0x3000, // 5 slot EDR packet 1139 }; 1140 1141 static uint16_t hci_acl_packet_types_for_buffer_size_and_local_features(uint16_t buffer_size, uint8_t * local_supported_features){ 1142 // enable packet types based on size 1143 uint16_t packet_types = 0; 1144 unsigned int i; 1145 for (i=0;i<16;i++){ 1146 if (packet_type_sizes[i] == 0) continue; 1147 if (packet_type_sizes[i] <= buffer_size){ 1148 packet_types |= 1 << i; 1149 } 1150 } 1151 // disable packet types due to missing local supported features 1152 for (i=0;i<sizeof(packet_type_feature_requirement_bit);i++){ 1153 unsigned int bit_idx = packet_type_feature_requirement_bit[i]; 1154 int feature_set = (local_supported_features[bit_idx >> 3] & (1<<(bit_idx & 7))) != 0; 1155 if (feature_set) continue; 1156 log_info("Features bit %02u is not set, removing packet types 0x%04x", bit_idx, packet_type_feature_packet_mask[i]); 1157 packet_types &= ~packet_type_feature_packet_mask[i]; 1158 } 1159 // flip bits for "may not be used" 1160 packet_types ^= 0x3306; 1161 return packet_types; 1162 } 1163 1164 uint16_t hci_usable_acl_packet_types(void){ 1165 return hci_stack->packet_types; 1166 } 1167 #endif 1168 1169 uint8_t* hci_get_outgoing_packet_buffer(void){ 1170 // hci packet buffer is >= acl data packet length 1171 return hci_stack->hci_packet_buffer; 1172 } 1173 1174 uint16_t hci_max_acl_data_packet_length(void){ 1175 return hci_stack->acl_data_packet_length; 1176 } 1177 1178 #ifdef ENABLE_CLASSIC 1179 bool hci_extended_sco_link_supported(void){ 1180 // No. 31, byte 3, bit 7 1181 return (hci_stack->local_supported_features[3] & (1 << 7)) != 0; 1182 } 1183 #endif 1184 1185 bool hci_non_flushable_packet_boundary_flag_supported(void){ 1186 // No. 54, byte 6, bit 6 1187 return (hci_stack->local_supported_features[6u] & (1u << 6u)) != 0u; 1188 } 1189 1190 #ifdef ENABLE_CLASSIC 1191 static int gap_ssp_supported(void){ 1192 // No. 51, byte 6, bit 3 1193 return (hci_stack->local_supported_features[6u] & (1u << 3u)) != 0u; 1194 } 1195 #endif 1196 1197 static int hci_classic_supported(void){ 1198 #ifdef ENABLE_CLASSIC 1199 // No. 37, byte 4, bit 5, = No BR/EDR Support 1200 return (hci_stack->local_supported_features[4] & (1 << 5)) == 0; 1201 #else 1202 return 0; 1203 #endif 1204 } 1205 1206 static int hci_le_supported(void){ 1207 #ifdef ENABLE_BLE 1208 // No. 37, byte 4, bit 6 = LE Supported (Controller) 1209 return (hci_stack->local_supported_features[4u] & (1u << 6u)) != 0u; 1210 #else 1211 return 0; 1212 #endif 1213 } 1214 1215 static bool hci_command_supported(uint8_t command_index){ 1216 return (hci_stack->local_supported_commands & (1LU << command_index)) != 0; 1217 } 1218 1219 #ifdef ENABLE_BLE 1220 1221 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 1222 static bool hci_extended_advertising_supported(void){ 1223 return hci_command_supported(SUPPORTED_HCI_COMMAND_LE_SET_EXTENDED_ADVERTISING_ENABLE); 1224 } 1225 #endif 1226 1227 static void hci_get_own_address_for_addr_type(uint8_t own_addr_type, bd_addr_t own_addr){ 1228 if (own_addr_type == BD_ADDR_TYPE_LE_PUBLIC){ 1229 (void)memcpy(own_addr, hci_stack->local_bd_addr, 6); 1230 } else { 1231 (void)memcpy(own_addr, hci_stack->le_random_address, 6); 1232 } 1233 } 1234 1235 void gap_le_get_own_address(uint8_t * addr_type, bd_addr_t addr){ 1236 *addr_type = hci_stack->le_own_addr_type; 1237 hci_get_own_address_for_addr_type(hci_stack->le_own_addr_type, addr); 1238 } 1239 1240 #ifdef ENABLE_LE_PERIPHERAL 1241 void gap_le_get_own_advertisements_address(uint8_t * addr_type, bd_addr_t addr){ 1242 *addr_type = hci_stack->le_advertisements_own_addr_type; 1243 hci_get_own_address_for_addr_type(hci_stack->le_advertisements_own_addr_type, addr); 1244 }; 1245 #endif 1246 1247 #ifdef ENABLE_LE_CENTRAL 1248 1249 /** 1250 * @brief Get own addr type and address used for LE connections (Central) 1251 */ 1252 void gap_le_get_own_connection_address(uint8_t * addr_type, bd_addr_t addr){ 1253 *addr_type = hci_stack->le_connection_own_addr_type; 1254 hci_get_own_address_for_addr_type(hci_stack->le_connection_own_addr_type, addr); 1255 } 1256 1257 void le_handle_advertisement_report(uint8_t *packet, uint16_t size){ 1258 1259 uint16_t offset = 3; 1260 uint8_t num_reports = packet[offset]; 1261 offset += 1; 1262 1263 uint16_t i; 1264 uint8_t event[12 + LE_ADVERTISING_DATA_SIZE]; // use upper bound to avoid var size automatic var 1265 for (i=0; (i<num_reports) && (offset < size);i++){ 1266 // sanity checks on data_length: 1267 uint8_t data_length = packet[offset + 8]; 1268 if (data_length > LE_ADVERTISING_DATA_SIZE) return; 1269 if ((offset + 9u + data_length + 1u) > size) return; 1270 // setup event 1271 uint8_t event_size = 10u + data_length; 1272 uint16_t pos = 0; 1273 event[pos++] = GAP_EVENT_ADVERTISING_REPORT; 1274 event[pos++] = event_size; 1275 (void)memcpy(&event[pos], &packet[offset], 1 + 1 + 6); // event type + address type + address 1276 offset += 8; 1277 pos += 8; 1278 event[pos++] = packet[offset + 1 + data_length]; // rssi 1279 event[pos++] = data_length; 1280 offset++; 1281 (void)memcpy(&event[pos], &packet[offset], data_length); 1282 pos += data_length; 1283 offset += data_length + 1u; // rssi 1284 hci_emit_event(event, pos, 1); 1285 } 1286 } 1287 1288 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 1289 void le_handle_extended_advertisement_report(uint8_t *packet, uint16_t size) { 1290 uint16_t offset = 3; 1291 uint8_t num_reports = packet[offset++]; 1292 uint8_t event[2 + 255]; // use upper bound to avoid var size automatic var 1293 uint8_t i; 1294 for (i=0; (i<num_reports) && (offset < size);i++){ 1295 // sanity checks on data_length: 1296 uint16_t data_length = packet[offset + 23]; 1297 if (data_length > LE_ADVERTISING_DATA_SIZE) return; 1298 if ((offset + 24u + data_length) > size) return; 1299 uint16_t event_type = little_endian_read_16(packet, offset); 1300 offset += 2; 1301 if ((event_type & 0x10) != 0) { 1302 // setup legacy event 1303 uint8_t legacy_event_type; 1304 switch (event_type){ 1305 case 0b0010011: 1306 // ADV_IND 1307 legacy_event_type = 0; 1308 break; 1309 case 0b0010101: 1310 // ADV_DIRECT_IND 1311 legacy_event_type = 1; 1312 break; 1313 case 0b0010010: 1314 // ADV_SCAN_IND 1315 legacy_event_type = 2; 1316 break; 1317 case 0b0010000: 1318 // ADV_NONCONN_IND 1319 legacy_event_type = 3; 1320 break; 1321 case 0b0011011: 1322 case 0b0011010: 1323 // SCAN_RSP 1324 legacy_event_type = 4; 1325 break; 1326 default: 1327 legacy_event_type = 0; 1328 break; 1329 } 1330 uint16_t pos = 0; 1331 event[pos++] = GAP_EVENT_ADVERTISING_REPORT; 1332 event[pos++] = 10u + data_length; 1333 event[pos++] = legacy_event_type; 1334 // copy address type + address 1335 (void) memcpy(&event[pos], &packet[offset], 1 + 6); 1336 offset += 7; 1337 pos += 7; 1338 // skip primary_phy, secondary_phy, advertising_sid, tx_power 1339 offset += 4; 1340 // copy rssi 1341 event[pos++] = packet[offset++]; 1342 // skip periodic advertising interval and direct address 1343 offset += 9; 1344 // copy data len + data; 1345 (void) memcpy(&event[pos], &packet[offset], 1 + data_length); 1346 pos += 1 +data_length; 1347 offset += 1+ data_length; 1348 hci_emit_event(event, pos, 1); 1349 } else { 1350 event[0] = GAP_EVENT_EXTENDED_ADVERTISING_REPORT; 1351 uint8_t report_len = 24 + data_length; 1352 event[1] = report_len; 1353 little_endian_store_16(event, 2, event_type); 1354 memcpy(&event[4], &packet[offset], report_len); 1355 offset += report_len; 1356 hci_emit_event(event, 2 + report_len, 1); 1357 } 1358 } 1359 } 1360 #endif 1361 1362 #endif 1363 #endif 1364 1365 #ifdef ENABLE_BLE 1366 #ifdef ENABLE_LE_PERIPHERAL 1367 static void hci_update_advertisements_enabled_for_current_roles(void){ 1368 if ((hci_stack->le_advertisements_state & LE_ADVERTISEMENT_STATE_ENABLED) != 0){ 1369 // get number of active le slave connections 1370 int num_slave_connections = 0; 1371 btstack_linked_list_iterator_t it; 1372 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 1373 while (btstack_linked_list_iterator_has_next(&it)){ 1374 hci_connection_t * con = (hci_connection_t*) btstack_linked_list_iterator_next(&it); 1375 log_info("state %u, role %u, le_con %u", con->state, con->role, hci_is_le_connection(con)); 1376 if (con->state != OPEN) continue; 1377 if (con->role != HCI_ROLE_SLAVE) continue; 1378 if (!hci_is_le_connection(con)) continue; 1379 num_slave_connections++; 1380 } 1381 log_info("Num LE Peripheral roles: %u of %u", num_slave_connections, hci_stack->le_max_number_peripheral_connections); 1382 hci_stack->le_advertisements_enabled_for_current_roles = num_slave_connections < hci_stack->le_max_number_peripheral_connections; 1383 } else { 1384 hci_stack->le_advertisements_enabled_for_current_roles = false; 1385 } 1386 } 1387 #endif 1388 #endif 1389 1390 #ifdef ENABLE_CLASSIC 1391 static void gap_run_set_local_name(void){ 1392 hci_reserve_packet_buffer(); 1393 uint8_t * packet = hci_stack->hci_packet_buffer; 1394 // construct HCI Command and send 1395 uint16_t opcode = hci_write_local_name.opcode; 1396 hci_stack->last_cmd_opcode = opcode; 1397 packet[0] = opcode & 0xff; 1398 packet[1] = opcode >> 8; 1399 packet[2] = DEVICE_NAME_LEN; 1400 memset(&packet[3], 0, DEVICE_NAME_LEN); 1401 uint16_t name_len = (uint16_t) strlen(hci_stack->local_name); 1402 uint16_t bytes_to_copy = btstack_min(name_len, DEVICE_NAME_LEN); 1403 // if shorter than DEVICE_NAME_LEN, it's implicitly NULL-terminated by memset call 1404 (void)memcpy(&packet[3], hci_stack->local_name, bytes_to_copy); 1405 // expand '00:00:00:00:00:00' in name with bd_addr 1406 btstack_replace_bd_addr_placeholder(&packet[3], bytes_to_copy, hci_stack->local_bd_addr); 1407 hci_send_cmd_packet(packet, HCI_CMD_HEADER_SIZE + DEVICE_NAME_LEN); 1408 } 1409 1410 static void gap_run_set_eir_data(void){ 1411 hci_reserve_packet_buffer(); 1412 uint8_t * packet = hci_stack->hci_packet_buffer; 1413 // construct HCI Command in-place and send 1414 uint16_t opcode = hci_write_extended_inquiry_response.opcode; 1415 hci_stack->last_cmd_opcode = opcode; 1416 uint16_t offset = 0; 1417 packet[offset++] = opcode & 0xff; 1418 packet[offset++] = opcode >> 8; 1419 packet[offset++] = 1 + EXTENDED_INQUIRY_RESPONSE_DATA_LEN; 1420 packet[offset++] = 0; // FEC not required 1421 memset(&packet[offset], 0, EXTENDED_INQUIRY_RESPONSE_DATA_LEN); 1422 if (hci_stack->eir_data){ 1423 // copy items and expand '00:00:00:00:00:00' in name with bd_addr 1424 ad_context_t context; 1425 for (ad_iterator_init(&context, EXTENDED_INQUIRY_RESPONSE_DATA_LEN, hci_stack->eir_data) ; ad_iterator_has_more(&context) ; ad_iterator_next(&context)) { 1426 uint8_t data_type = ad_iterator_get_data_type(&context); 1427 uint8_t size = ad_iterator_get_data_len(&context); 1428 const uint8_t *data = ad_iterator_get_data(&context); 1429 // copy item 1430 packet[offset++] = size + 1; 1431 packet[offset++] = data_type; 1432 memcpy(&packet[offset], data, size); 1433 // update name item 1434 if ((data_type == BLUETOOTH_DATA_TYPE_SHORTENED_LOCAL_NAME) || (data_type == BLUETOOTH_DATA_TYPE_COMPLETE_LOCAL_NAME)){ 1435 btstack_replace_bd_addr_placeholder(&packet[offset], size, hci_stack->local_bd_addr); 1436 } 1437 offset += size; 1438 } 1439 } else { 1440 uint16_t name_len = (uint16_t) strlen(hci_stack->local_name); 1441 uint16_t bytes_to_copy = btstack_min(name_len, EXTENDED_INQUIRY_RESPONSE_DATA_LEN - 2); 1442 packet[offset++] = bytes_to_copy + 1; 1443 packet[offset++] = BLUETOOTH_DATA_TYPE_COMPLETE_LOCAL_NAME; 1444 (void)memcpy(&packet[6], hci_stack->local_name, bytes_to_copy); 1445 // expand '00:00:00:00:00:00' in name with bd_addr 1446 btstack_replace_bd_addr_placeholder(&packet[offset], bytes_to_copy, hci_stack->local_bd_addr); 1447 } 1448 hci_send_cmd_packet(packet, HCI_CMD_HEADER_SIZE + 1 + EXTENDED_INQUIRY_RESPONSE_DATA_LEN); 1449 } 1450 1451 static void hci_run_gap_tasks_classic(void){ 1452 if ((hci_stack->gap_tasks_classic & GAP_TASK_SET_CLASS_OF_DEVICE) != 0) { 1453 hci_stack->gap_tasks_classic &= ~GAP_TASK_SET_CLASS_OF_DEVICE; 1454 hci_send_cmd(&hci_write_class_of_device, hci_stack->class_of_device); 1455 return; 1456 } 1457 if ((hci_stack->gap_tasks_classic & GAP_TASK_SET_LOCAL_NAME) != 0) { 1458 hci_stack->gap_tasks_classic &= ~GAP_TASK_SET_LOCAL_NAME; 1459 gap_run_set_local_name(); 1460 return; 1461 } 1462 if ((hci_stack->gap_tasks_classic & GAP_TASK_SET_EIR_DATA) != 0) { 1463 hci_stack->gap_tasks_classic &= ~GAP_TASK_SET_EIR_DATA; 1464 gap_run_set_eir_data(); 1465 return; 1466 } 1467 if ((hci_stack->gap_tasks_classic & GAP_TASK_SET_DEFAULT_LINK_POLICY) != 0) { 1468 hci_stack->gap_tasks_classic &= ~GAP_TASK_SET_DEFAULT_LINK_POLICY; 1469 hci_send_cmd(&hci_write_default_link_policy_setting, hci_stack->default_link_policy_settings); 1470 return; 1471 } 1472 // write page scan activity 1473 if ((hci_stack->gap_tasks_classic & GAP_TASK_WRITE_PAGE_SCAN_ACTIVITY) != 0) { 1474 hci_stack->gap_tasks_classic &= ~GAP_TASK_WRITE_PAGE_SCAN_ACTIVITY; 1475 hci_send_cmd(&hci_write_page_scan_activity, hci_stack->new_page_scan_interval, hci_stack->new_page_scan_window); 1476 return; 1477 } 1478 // write page scan type 1479 if ((hci_stack->gap_tasks_classic & GAP_TASK_WRITE_PAGE_SCAN_TYPE) != 0) { 1480 hci_stack->gap_tasks_classic &= ~GAP_TASK_WRITE_PAGE_SCAN_TYPE; 1481 hci_send_cmd(&hci_write_page_scan_type, hci_stack->new_page_scan_type); 1482 return; 1483 } 1484 // write page timeout 1485 if ((hci_stack->gap_tasks_classic & GAP_TASK_WRITE_PAGE_TIMEOUT) != 0) { 1486 hci_stack->gap_tasks_classic &= ~GAP_TASK_WRITE_PAGE_TIMEOUT; 1487 hci_send_cmd(&hci_write_page_timeout, hci_stack->page_timeout); 1488 return; 1489 } 1490 // send scan enable 1491 if ((hci_stack->gap_tasks_classic & GAP_TASK_WRITE_SCAN_ENABLE) != 0) { 1492 hci_stack->gap_tasks_classic &= ~GAP_TASK_WRITE_SCAN_ENABLE; 1493 hci_send_cmd(&hci_write_scan_enable, hci_stack->new_scan_enable_value); 1494 return; 1495 } 1496 // send write scan activity 1497 if ((hci_stack->gap_tasks_classic & GAP_TASK_WRITE_INQUIRY_SCAN_ACTIVITY) != 0) { 1498 hci_stack->gap_tasks_classic &= ~GAP_TASK_WRITE_INQUIRY_SCAN_ACTIVITY; 1499 hci_send_cmd(&hci_write_inquiry_scan_activity, hci_stack->inquiry_scan_interval, hci_stack->inquiry_scan_window); 1500 return; 1501 } 1502 } 1503 #endif 1504 1505 #ifndef HAVE_HOST_CONTROLLER_API 1506 1507 static uint32_t hci_transport_uart_get_main_baud_rate(void){ 1508 if (!hci_stack->config) return 0; 1509 uint32_t baud_rate = ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_main; 1510 // Limit baud rate for Broadcom chipsets to 3 mbps 1511 if ((hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION) && (baud_rate > 3000000)){ 1512 baud_rate = 3000000; 1513 } 1514 return baud_rate; 1515 } 1516 1517 static void hci_initialization_timeout_handler(btstack_timer_source_t * ds){ 1518 UNUSED(ds); 1519 1520 switch (hci_stack->substate){ 1521 case HCI_INIT_W4_SEND_RESET: 1522 log_info("Resend HCI Reset"); 1523 hci_stack->substate = HCI_INIT_SEND_RESET; 1524 hci_stack->num_cmd_packets = 1; 1525 hci_run(); 1526 break; 1527 case HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT_LINK_RESET: 1528 log_info("Resend HCI Reset - CSR Warm Boot with Link Reset"); 1529 if (hci_stack->hci_transport->reset_link){ 1530 hci_stack->hci_transport->reset_link(); 1531 } 1532 1533 /* fall through */ 1534 1535 case HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT: 1536 log_info("Resend HCI Reset - CSR Warm Boot"); 1537 hci_stack->substate = HCI_INIT_SEND_RESET_CSR_WARM_BOOT; 1538 hci_stack->num_cmd_packets = 1; 1539 hci_run(); 1540 break; 1541 case HCI_INIT_W4_SEND_BAUD_CHANGE: 1542 if (hci_stack->hci_transport->set_baudrate){ 1543 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1544 log_info("Local baud rate change to %" PRIu32 "(timeout handler)", baud_rate); 1545 hci_stack->hci_transport->set_baudrate(baud_rate); 1546 } 1547 // For CSR, HCI Reset is sent on new baud rate. Don't forget to reset link for H5/BCSP 1548 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_CAMBRIDGE_SILICON_RADIO){ 1549 if (hci_stack->hci_transport->reset_link){ 1550 log_info("Link Reset"); 1551 hci_stack->hci_transport->reset_link(); 1552 } 1553 hci_stack->substate = HCI_INIT_SEND_RESET_CSR_WARM_BOOT; 1554 hci_run(); 1555 } 1556 break; 1557 case HCI_INIT_W4_CUSTOM_INIT_BCM_DELAY: 1558 // otherwise continue 1559 hci_stack->substate = HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS; 1560 hci_send_cmd(&hci_read_local_supported_commands); 1561 break; 1562 default: 1563 break; 1564 } 1565 } 1566 #endif 1567 1568 static void hci_initializing_next_state(void){ 1569 hci_stack->substate = (hci_substate_t )( ((int) hci_stack->substate) + 1); 1570 } 1571 1572 static void hci_init_done(void){ 1573 // done. tell the app 1574 log_info("hci_init_done -> HCI_STATE_WORKING"); 1575 hci_stack->state = HCI_STATE_WORKING; 1576 hci_emit_state(); 1577 } 1578 1579 // assumption: hci_can_send_command_packet_now() == true 1580 static void hci_initializing_run(void){ 1581 log_debug("hci_initializing_run: substate %u, can send %u", hci_stack->substate, hci_can_send_command_packet_now()); 1582 1583 if (!hci_can_send_command_packet_now()) return; 1584 1585 #ifndef HAVE_HOST_CONTROLLER_API 1586 bool need_baud_change = hci_stack->config 1587 && hci_stack->chipset 1588 && hci_stack->chipset->set_baudrate_command 1589 && hci_stack->hci_transport->set_baudrate 1590 && ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_main; 1591 #endif 1592 1593 switch (hci_stack->substate){ 1594 case HCI_INIT_SEND_RESET: 1595 hci_state_reset(); 1596 1597 #ifndef HAVE_HOST_CONTROLLER_API 1598 // prepare reset if command complete not received in 100ms 1599 btstack_run_loop_set_timer(&hci_stack->timeout, HCI_RESET_RESEND_TIMEOUT_MS); 1600 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_initialization_timeout_handler); 1601 btstack_run_loop_add_timer(&hci_stack->timeout); 1602 #endif 1603 // send command 1604 hci_stack->substate = HCI_INIT_W4_SEND_RESET; 1605 hci_send_cmd(&hci_reset); 1606 break; 1607 case HCI_INIT_SEND_READ_LOCAL_VERSION_INFORMATION: 1608 hci_send_cmd(&hci_read_local_version_information); 1609 hci_stack->substate = HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION; 1610 break; 1611 1612 #ifndef HAVE_HOST_CONTROLLER_API 1613 case HCI_INIT_SEND_RESET_CSR_WARM_BOOT: 1614 hci_state_reset(); 1615 // prepare reset if command complete not received in 100ms 1616 btstack_run_loop_set_timer(&hci_stack->timeout, HCI_RESET_RESEND_TIMEOUT_MS); 1617 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_initialization_timeout_handler); 1618 btstack_run_loop_add_timer(&hci_stack->timeout); 1619 // send command 1620 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT; 1621 hci_send_cmd(&hci_reset); 1622 break; 1623 case HCI_INIT_SEND_RESET_ST_WARM_BOOT: 1624 hci_state_reset(); 1625 hci_stack->substate = HCI_INIT_W4_SEND_RESET_ST_WARM_BOOT; 1626 hci_send_cmd(&hci_reset); 1627 break; 1628 case HCI_INIT_SEND_BAUD_CHANGE_BCM: { 1629 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1630 hci_stack->chipset->set_baudrate_command(baud_rate, hci_stack->hci_packet_buffer); 1631 hci_stack->last_cmd_opcode = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 1632 hci_stack->substate = HCI_INIT_W4_SEND_BAUD_CHANGE_BCM; 1633 hci_send_cmd_packet(hci_stack->hci_packet_buffer, 3u + hci_stack->hci_packet_buffer[2u]); 1634 break; 1635 } 1636 case HCI_INIT_SET_BD_ADDR: 1637 log_info("Set Public BD ADDR to %s", bd_addr_to_str(hci_stack->custom_bd_addr)); 1638 hci_stack->chipset->set_bd_addr_command(hci_stack->custom_bd_addr, hci_stack->hci_packet_buffer); 1639 hci_stack->last_cmd_opcode = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 1640 hci_stack->substate = HCI_INIT_W4_SET_BD_ADDR; 1641 hci_send_cmd_packet(hci_stack->hci_packet_buffer, 3u + hci_stack->hci_packet_buffer[2u]); 1642 break; 1643 case HCI_INIT_SEND_READ_LOCAL_NAME: 1644 #ifdef ENABLE_CLASSIC 1645 hci_send_cmd(&hci_read_local_name); 1646 hci_stack->substate = HCI_INIT_W4_SEND_READ_LOCAL_NAME; 1647 break; 1648 #endif 1649 /* fall through */ 1650 1651 case HCI_INIT_SEND_BAUD_CHANGE: 1652 if (need_baud_change) { 1653 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1654 hci_stack->chipset->set_baudrate_command(baud_rate, hci_stack->hci_packet_buffer); 1655 hci_stack->last_cmd_opcode = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 1656 hci_stack->substate = HCI_INIT_W4_SEND_BAUD_CHANGE; 1657 hci_send_cmd_packet(hci_stack->hci_packet_buffer, 3u + hci_stack->hci_packet_buffer[2u]); 1658 // STLC25000D: baudrate change happens within 0.5 s after command was send, 1659 // use timer to update baud rate after 100 ms (knowing exactly, when command was sent is non-trivial) 1660 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_ST_MICROELECTRONICS){ 1661 btstack_run_loop_set_timer(&hci_stack->timeout, HCI_RESET_RESEND_TIMEOUT_MS); 1662 btstack_run_loop_add_timer(&hci_stack->timeout); 1663 } 1664 break; 1665 } 1666 1667 /* fall through */ 1668 1669 case HCI_INIT_CUSTOM_INIT: 1670 // Custom initialization 1671 if (hci_stack->chipset && hci_stack->chipset->next_command){ 1672 hci_stack->chipset_result = (*hci_stack->chipset->next_command)(hci_stack->hci_packet_buffer); 1673 bool send_cmd = false; 1674 switch (hci_stack->chipset_result){ 1675 case BTSTACK_CHIPSET_VALID_COMMAND: 1676 send_cmd = true; 1677 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT; 1678 break; 1679 case BTSTACK_CHIPSET_WARMSTART_REQUIRED: 1680 send_cmd = true; 1681 // CSR Warm Boot: Wait a bit, then send HCI Reset until HCI Command Complete 1682 log_info("CSR Warm Boot"); 1683 btstack_run_loop_set_timer(&hci_stack->timeout, HCI_RESET_RESEND_TIMEOUT_MS); 1684 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_initialization_timeout_handler); 1685 btstack_run_loop_add_timer(&hci_stack->timeout); 1686 if ((hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_CAMBRIDGE_SILICON_RADIO) 1687 && hci_stack->config 1688 && hci_stack->chipset 1689 // && hci_stack->chipset->set_baudrate_command -- there's no such command 1690 && hci_stack->hci_transport->set_baudrate 1691 && hci_transport_uart_get_main_baud_rate()){ 1692 hci_stack->substate = HCI_INIT_W4_SEND_BAUD_CHANGE; 1693 } else { 1694 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT_LINK_RESET; 1695 } 1696 break; 1697 default: 1698 break; 1699 } 1700 1701 if (send_cmd){ 1702 int size = 3u + hci_stack->hci_packet_buffer[2u]; 1703 hci_stack->last_cmd_opcode = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 1704 hci_dump_packet(HCI_COMMAND_DATA_PACKET, 0, hci_stack->hci_packet_buffer, size); 1705 hci_stack->hci_transport->send_packet(HCI_COMMAND_DATA_PACKET, hci_stack->hci_packet_buffer, size); 1706 break; 1707 } 1708 log_info("Init script done"); 1709 1710 // Init script download on Broadcom chipsets causes: 1711 if ( (hci_stack->chipset_result != BTSTACK_CHIPSET_NO_INIT_SCRIPT) && 1712 ( (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION) 1713 || (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_EM_MICROELECTRONIC_MARIN_SA)) ){ 1714 1715 // - baud rate to reset, restore UART baud rate if needed 1716 if (need_baud_change) { 1717 uint32_t baud_rate = ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_init; 1718 log_info("Local baud rate change to %" PRIu32 " after init script (bcm)", baud_rate); 1719 hci_stack->hci_transport->set_baudrate(baud_rate); 1720 } 1721 1722 uint16_t bcm_delay_ms = 300; 1723 // - UART may or may not be disabled during update and Controller RTS may or may not be high during this time 1724 // -> Work around: wait here. 1725 log_info("BCM delay (%u ms) after init script", bcm_delay_ms); 1726 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT_BCM_DELAY; 1727 btstack_run_loop_set_timer(&hci_stack->timeout, bcm_delay_ms); 1728 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_initialization_timeout_handler); 1729 btstack_run_loop_add_timer(&hci_stack->timeout); 1730 break; 1731 } 1732 } 1733 #endif 1734 /* fall through */ 1735 1736 case HCI_INIT_READ_LOCAL_SUPPORTED_COMMANDS: 1737 hci_stack->substate = HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS; 1738 hci_send_cmd(&hci_read_local_supported_commands); 1739 break; 1740 case HCI_INIT_READ_BD_ADDR: 1741 hci_stack->substate = HCI_INIT_W4_READ_BD_ADDR; 1742 hci_send_cmd(&hci_read_bd_addr); 1743 break; 1744 case HCI_INIT_READ_BUFFER_SIZE: 1745 // only read buffer size if supported 1746 if (hci_command_supported(SUPPORTED_HCI_COMMAND_READ_BUFFER_SIZE)){ 1747 hci_stack->substate = HCI_INIT_W4_READ_BUFFER_SIZE; 1748 hci_send_cmd(&hci_read_buffer_size); 1749 break; 1750 } 1751 1752 /* fall through */ 1753 1754 case HCI_INIT_READ_LOCAL_SUPPORTED_FEATURES: 1755 hci_stack->substate = HCI_INIT_W4_READ_LOCAL_SUPPORTED_FEATURES; 1756 hci_send_cmd(&hci_read_local_supported_features); 1757 break; 1758 1759 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 1760 case HCI_INIT_SET_CONTROLLER_TO_HOST_FLOW_CONTROL: 1761 hci_stack->substate = HCI_INIT_W4_SET_CONTROLLER_TO_HOST_FLOW_CONTROL; 1762 hci_send_cmd(&hci_set_controller_to_host_flow_control, 3); // ACL + SCO Flow Control 1763 break; 1764 case HCI_INIT_HOST_BUFFER_SIZE: 1765 hci_stack->substate = HCI_INIT_W4_HOST_BUFFER_SIZE; 1766 hci_send_cmd(&hci_host_buffer_size, HCI_HOST_ACL_PACKET_LEN, HCI_HOST_SCO_PACKET_LEN, 1767 HCI_HOST_ACL_PACKET_NUM, HCI_HOST_SCO_PACKET_NUM); 1768 break; 1769 #endif 1770 1771 case HCI_INIT_SET_EVENT_MASK: 1772 hci_stack->substate = HCI_INIT_W4_SET_EVENT_MASK; 1773 if (hci_le_supported()){ 1774 hci_send_cmd(&hci_set_event_mask,0xFFFFFFFFU, 0x3FFFFFFFU); 1775 } else { 1776 // Kensington Bluetooth 2.1 USB Dongle (CSR Chipset) returns an error for 0xffff... 1777 hci_send_cmd(&hci_set_event_mask,0xFFFFFFFFU, 0x1FFFFFFFU); 1778 } 1779 break; 1780 1781 #ifdef ENABLE_CLASSIC 1782 case HCI_INIT_WRITE_SIMPLE_PAIRING_MODE: 1783 if (hci_classic_supported() && gap_ssp_supported()){ 1784 hci_stack->substate = HCI_INIT_W4_WRITE_SIMPLE_PAIRING_MODE; 1785 hci_send_cmd(&hci_write_simple_pairing_mode, hci_stack->ssp_enable); 1786 break; 1787 } 1788 1789 /* fall through */ 1790 1791 case HCI_INIT_WRITE_INQUIRY_MODE: 1792 if (hci_classic_supported()){ 1793 hci_stack->substate = HCI_INIT_W4_WRITE_INQUIRY_MODE; 1794 hci_send_cmd(&hci_write_inquiry_mode, (int) hci_stack->inquiry_mode); 1795 break; 1796 } 1797 1798 /* fall through */ 1799 1800 case HCI_INIT_WRITE_SECURE_CONNECTIONS_HOST_ENABLE: 1801 // skip write secure connections host support if not supported or disabled 1802 if (hci_classic_supported() && hci_stack->secure_connections_enable 1803 && hci_command_supported(SUPPORTED_HCI_COMMAND_WRITE_SECURE_CONNECTIONS_HOST)) { 1804 hci_stack->secure_connections_active = true; 1805 hci_stack->substate = HCI_INIT_W4_WRITE_SECURE_CONNECTIONS_HOST_ENABLE; 1806 hci_send_cmd(&hci_write_secure_connections_host_support, 1); 1807 break; 1808 } 1809 1810 /* fall through */ 1811 1812 case HCI_INIT_SET_MIN_ENCRYPTION_KEY_SIZE: 1813 // skip set min encryption key size 1814 if (hci_classic_supported() && hci_command_supported(SUPPORTED_HCI_COMMAND_SET_MIN_ENCRYPTION_KEY_SIZE)) { 1815 hci_stack->substate = HCI_INIT_W4_SET_MIN_ENCRYPTION_KEY_SIZE; 1816 hci_send_cmd(&hci_set_min_encryption_key_size, hci_stack->gap_required_encyrption_key_size); 1817 break; 1818 } 1819 1820 #ifdef ENABLE_SCO_OVER_HCI 1821 /* fall through */ 1822 1823 // only sent if ENABLE_SCO_OVER_HCI is defined 1824 case HCI_INIT_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE: 1825 // skip write synchronous flow control if not supported 1826 if (hci_classic_supported() 1827 && hci_command_supported(SUPPORTED_HCI_COMMAND_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE)) { 1828 hci_stack->substate = HCI_INIT_W4_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE; 1829 hci_send_cmd(&hci_write_synchronous_flow_control_enable, 1); // SCO tracking enabled 1830 break; 1831 } 1832 /* fall through */ 1833 1834 case HCI_INIT_WRITE_DEFAULT_ERRONEOUS_DATA_REPORTING: 1835 // skip write default erroneous data reporting if not supported 1836 if (hci_classic_supported() 1837 && hci_command_supported(SUPPORTED_HCI_COMMAND_WRITE_DEFAULT_ERRONEOUS_DATA_REPORTING)) { 1838 hci_stack->substate = HCI_INIT_W4_WRITE_DEFAULT_ERRONEOUS_DATA_REPORTING; 1839 hci_send_cmd(&hci_write_default_erroneous_data_reporting, 1); 1840 break; 1841 } 1842 #endif 1843 1844 #if defined(ENABLE_SCO_OVER_HCI) || defined(ENABLE_SCO_OVER_PCM) 1845 /* fall through */ 1846 1847 // only sent if manufacturer is Broadcom and ENABLE_SCO_OVER_HCI or ENABLE_SCO_OVER_PCM is defined 1848 case HCI_INIT_BCM_WRITE_SCO_PCM_INT: 1849 if (hci_classic_supported() && (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION)){ 1850 hci_stack->substate = HCI_INIT_W4_BCM_WRITE_SCO_PCM_INT; 1851 #ifdef ENABLE_SCO_OVER_HCI 1852 log_info("BCM: Route SCO data via HCI transport"); 1853 hci_send_cmd(&hci_bcm_write_sco_pcm_int, 1, 0, 0, 0, 0); 1854 #endif 1855 #ifdef ENABLE_SCO_OVER_PCM 1856 log_info("BCM: Route SCO data via PCM interface"); 1857 #ifdef ENABLE_BCM_PCM_WBS 1858 // 512 kHz bit clock for 2 channels x 16 bit x 16 kHz 1859 hci_send_cmd(&hci_bcm_write_sco_pcm_int, 0, 2, 0, 1, 1); 1860 #else 1861 // 256 kHz bit clock for 2 channels x 16 bit x 8 kHz 1862 hci_send_cmd(&hci_bcm_write_sco_pcm_int, 0, 1, 0, 1, 1); 1863 #endif 1864 #endif 1865 break; 1866 } 1867 #endif 1868 1869 #ifdef ENABLE_SCO_OVER_PCM 1870 /* fall through */ 1871 1872 case HCI_INIT_BCM_WRITE_I2SPCM_INTERFACE_PARAM: 1873 if (hci_classic_supported() && (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION)){ 1874 hci_stack->substate = HCI_INIT_W4_BCM_WRITE_I2SPCM_INTERFACE_PARAM; 1875 log_info("BCM: Config PCM interface for I2S"); 1876 #ifdef ENABLE_BCM_PCM_WBS 1877 // 512 kHz bit clock for 2 channels x 16 bit x 8 kHz 1878 hci_send_cmd(&hci_bcm_write_i2spcm_interface_param, 1, 1, 0, 2); 1879 #else 1880 // 256 kHz bit clock for 2 channels x 16 bit x 8 kHz 1881 hci_send_cmd(&hci_bcm_write_i2spcm_interface_param, 1, 1, 0, 1); 1882 #endif 1883 break; 1884 } 1885 #endif 1886 #endif 1887 1888 #ifdef ENABLE_BLE 1889 /* fall through */ 1890 1891 // LE INIT 1892 case HCI_INIT_LE_READ_BUFFER_SIZE: 1893 if (hci_le_supported()){ 1894 hci_stack->substate = HCI_INIT_W4_LE_READ_BUFFER_SIZE; 1895 if (hci_command_supported(SUPPORTED_HCI_COMMAND_LE_READ_BUFFER_SIZE_V2)){ 1896 hci_send_cmd(&hci_le_read_buffer_size_v2); 1897 } else { 1898 hci_send_cmd(&hci_le_read_buffer_size); 1899 } 1900 break; 1901 } 1902 1903 /* fall through */ 1904 1905 case HCI_INIT_WRITE_LE_HOST_SUPPORTED: 1906 // skip write le host if not supported (e.g. on LE only EM9301) 1907 if (hci_le_supported() 1908 && hci_command_supported(SUPPORTED_HCI_COMMAND_WRITE_LE_HOST_SUPPORTED)) { 1909 // LE Supported Host = 1, Simultaneous Host = 0 1910 hci_stack->substate = HCI_INIT_W4_WRITE_LE_HOST_SUPPORTED; 1911 hci_send_cmd(&hci_write_le_host_supported, 1, 0); 1912 break; 1913 } 1914 1915 /* fall through */ 1916 1917 case HCI_INIT_LE_SET_EVENT_MASK: 1918 if (hci_le_supported()){ 1919 hci_stack->substate = HCI_INIT_W4_LE_SET_EVENT_MASK; 1920 hci_send_cmd(&hci_le_set_event_mask, 0xfffffdff, 0x07); // all events from core v5.3 without LE Enhanced Connection Complete 1921 break; 1922 } 1923 #endif 1924 1925 #ifdef ENABLE_LE_DATA_LENGTH_EXTENSION 1926 /* fall through */ 1927 1928 case HCI_INIT_LE_READ_MAX_DATA_LENGTH: 1929 if (hci_le_supported() 1930 && hci_command_supported(SUPPORTED_HCI_COMMAND_LE_READ_MAXIMUM_DATA_LENGTH)) { 1931 hci_stack->substate = HCI_INIT_W4_LE_READ_MAX_DATA_LENGTH; 1932 hci_send_cmd(&hci_le_read_maximum_data_length); 1933 break; 1934 } 1935 1936 /* fall through */ 1937 1938 case HCI_INIT_LE_WRITE_SUGGESTED_DATA_LENGTH: 1939 if (hci_le_supported() 1940 && hci_command_supported(SUPPORTED_HCI_COMMAND_LE_WRITE_SUGGESTED_DEFAULT_DATA_LENGTH)) { 1941 hci_stack->substate = HCI_INIT_W4_LE_WRITE_SUGGESTED_DATA_LENGTH; 1942 hci_send_cmd(&hci_le_write_suggested_default_data_length, hci_stack->le_supported_max_tx_octets, hci_stack->le_supported_max_tx_time); 1943 break; 1944 } 1945 #endif 1946 1947 #ifdef ENABLE_LE_CENTRAL 1948 /* fall through */ 1949 1950 case HCI_INIT_READ_WHITE_LIST_SIZE: 1951 if (hci_le_supported()){ 1952 hci_stack->substate = HCI_INIT_W4_READ_WHITE_LIST_SIZE; 1953 hci_send_cmd(&hci_le_read_white_list_size); 1954 break; 1955 } 1956 1957 #endif 1958 1959 #ifdef ENABLE_LE_PERIPHERAL 1960 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 1961 /* fall through */ 1962 1963 case HCI_INIT_LE_READ_MAX_ADV_DATA_LEN: 1964 if (hci_extended_advertising_supported()){ 1965 hci_stack->substate = HCI_INIT_W4_LE_READ_MAX_ADV_DATA_LEN; 1966 hci_send_cmd(&hci_le_read_maximum_advertising_data_length); 1967 break; 1968 } 1969 #endif 1970 #endif 1971 /* fall through */ 1972 1973 case HCI_INIT_DONE: 1974 hci_stack->substate = HCI_INIT_DONE; 1975 // main init sequence complete 1976 #ifdef ENABLE_CLASSIC 1977 // check if initial Classic GAP Tasks are completed 1978 if (hci_classic_supported() && (hci_stack->gap_tasks_classic != 0)) { 1979 hci_run_gap_tasks_classic(); 1980 break; 1981 } 1982 #endif 1983 #ifdef ENABLE_BLE 1984 #ifdef ENABLE_LE_CENTRAL 1985 // check if initial LE GAP Tasks are completed 1986 if (hci_le_supported() && hci_stack->le_scanning_param_update) { 1987 hci_run_general_gap_le(); 1988 break; 1989 } 1990 #endif 1991 #endif 1992 hci_init_done(); 1993 break; 1994 1995 default: 1996 return; 1997 } 1998 } 1999 2000 static bool hci_initializing_event_handler_command_completed(const uint8_t * packet){ 2001 bool command_completed = false; 2002 if (hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_COMPLETE){ 2003 uint16_t opcode = little_endian_read_16(packet,3); 2004 if (opcode == hci_stack->last_cmd_opcode){ 2005 command_completed = true; 2006 log_debug("Command complete for expected opcode %04x at substate %u", opcode, hci_stack->substate); 2007 } else { 2008 log_info("Command complete for different opcode %04x, expected %04x, at substate %u", opcode, hci_stack->last_cmd_opcode, hci_stack->substate); 2009 } 2010 } 2011 2012 if (hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_STATUS){ 2013 uint8_t status = packet[2]; 2014 uint16_t opcode = little_endian_read_16(packet,4); 2015 if (opcode == hci_stack->last_cmd_opcode){ 2016 if (status){ 2017 command_completed = true; 2018 log_debug("Command status error 0x%02x for expected opcode %04x at substate %u", status, opcode, hci_stack->substate); 2019 } else { 2020 log_info("Command status OK for expected opcode %04x, waiting for command complete", opcode); 2021 } 2022 } else { 2023 log_debug("Command status for opcode %04x, expected %04x", opcode, hci_stack->last_cmd_opcode); 2024 } 2025 } 2026 #ifndef HAVE_HOST_CONTROLLER_API 2027 // Vendor == CSR 2028 if ((hci_stack->substate == HCI_INIT_W4_CUSTOM_INIT) && (hci_event_packet_get_type(packet) == HCI_EVENT_VENDOR_SPECIFIC)){ 2029 // TODO: track actual command 2030 command_completed = true; 2031 } 2032 2033 // Vendor == Toshiba 2034 if ((hci_stack->substate == HCI_INIT_W4_SEND_BAUD_CHANGE) && (hci_event_packet_get_type(packet) == HCI_EVENT_VENDOR_SPECIFIC)){ 2035 // TODO: track actual command 2036 command_completed = true; 2037 // Fix: no HCI Command Complete received, so num_cmd_packets not reset 2038 hci_stack->num_cmd_packets = 1; 2039 } 2040 #endif 2041 2042 return command_completed; 2043 } 2044 2045 static void hci_initializing_event_handler(const uint8_t * packet, uint16_t size){ 2046 2047 UNUSED(size); // ok: less than 6 bytes are read from our buffer 2048 2049 bool command_completed = hci_initializing_event_handler_command_completed(packet); 2050 2051 #ifndef HAVE_HOST_CONTROLLER_API 2052 2053 // Late response (> 100 ms) for HCI Reset e.g. on Toshiba TC35661: 2054 // Command complete for HCI Reset arrives after we've resent the HCI Reset command 2055 // 2056 // HCI Reset 2057 // Timeout 100 ms 2058 // HCI Reset 2059 // Command Complete Reset 2060 // HCI Read Local Version Information 2061 // Command Complete Reset - but we expected Command Complete Read Local Version Information 2062 // hang... 2063 // 2064 // Fix: Command Complete for HCI Reset in HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION trigger resend 2065 if (!command_completed 2066 && (hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_COMPLETE) 2067 && (hci_stack->substate == HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION)){ 2068 2069 uint16_t opcode = little_endian_read_16(packet,3); 2070 if (opcode == hci_reset.opcode){ 2071 hci_stack->substate = HCI_INIT_SEND_READ_LOCAL_VERSION_INFORMATION; 2072 return; 2073 } 2074 } 2075 2076 // CSR & H5 2077 // Fix: Command Complete for HCI Reset in HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION trigger resend 2078 if (!command_completed 2079 && (hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_COMPLETE) 2080 && (hci_stack->substate == HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS)){ 2081 2082 uint16_t opcode = little_endian_read_16(packet,3); 2083 if (opcode == hci_reset.opcode){ 2084 hci_stack->substate = HCI_INIT_READ_LOCAL_SUPPORTED_COMMANDS; 2085 return; 2086 } 2087 } 2088 2089 // on CSR with BCSP/H5, the reset resend timeout leads to substate == HCI_INIT_SEND_RESET or HCI_INIT_SEND_RESET_CSR_WARM_BOOT 2090 // fix: Correct substate and behave as command below 2091 if (command_completed){ 2092 switch (hci_stack->substate){ 2093 case HCI_INIT_SEND_RESET: 2094 hci_stack->substate = HCI_INIT_W4_SEND_RESET; 2095 break; 2096 case HCI_INIT_SEND_RESET_CSR_WARM_BOOT: 2097 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT; 2098 break; 2099 default: 2100 break; 2101 } 2102 } 2103 2104 #endif 2105 2106 if (!command_completed) return; 2107 2108 bool need_baud_change = false; 2109 bool need_addr_change = false; 2110 2111 #ifndef HAVE_HOST_CONTROLLER_API 2112 need_baud_change = hci_stack->config 2113 && hci_stack->chipset 2114 && hci_stack->chipset->set_baudrate_command 2115 && hci_stack->hci_transport->set_baudrate 2116 && ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_main; 2117 2118 need_addr_change = hci_stack->custom_bd_addr_set 2119 && hci_stack->chipset 2120 && hci_stack->chipset->set_bd_addr_command; 2121 #endif 2122 2123 switch(hci_stack->substate){ 2124 2125 #ifndef HAVE_HOST_CONTROLLER_API 2126 case HCI_INIT_SEND_RESET: 2127 // on CSR with BCSP/H5, resend triggers resend of HCI Reset and leads to substate == HCI_INIT_SEND_RESET 2128 // fix: just correct substate and behave as command below 2129 2130 /* fall through */ 2131 #endif 2132 2133 case HCI_INIT_W4_SEND_RESET: 2134 btstack_run_loop_remove_timer(&hci_stack->timeout); 2135 hci_stack->substate = HCI_INIT_SEND_READ_LOCAL_VERSION_INFORMATION; 2136 return; 2137 2138 #ifndef HAVE_HOST_CONTROLLER_API 2139 case HCI_INIT_W4_SEND_BAUD_CHANGE: 2140 // for STLC2500D, baud rate change already happened. 2141 // for others, baud rate gets changed now 2142 if ((hci_stack->manufacturer != BLUETOOTH_COMPANY_ID_ST_MICROELECTRONICS) && need_baud_change){ 2143 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 2144 log_info("Local baud rate change to %" PRIu32 "(w4_send_baud_change)", baud_rate); 2145 hci_stack->hci_transport->set_baudrate(baud_rate); 2146 } 2147 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 2148 return; 2149 case HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT: 2150 btstack_run_loop_remove_timer(&hci_stack->timeout); 2151 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 2152 return; 2153 case HCI_INIT_W4_CUSTOM_INIT: 2154 // repeat custom init 2155 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 2156 return; 2157 #endif 2158 2159 case HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS: 2160 if (need_baud_change && (hci_stack->chipset_result != BTSTACK_CHIPSET_NO_INIT_SCRIPT) && 2161 ((hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION) || 2162 (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_EM_MICROELECTRONIC_MARIN_SA))) { 2163 hci_stack->substate = HCI_INIT_SEND_BAUD_CHANGE_BCM; 2164 return; 2165 } 2166 if (need_addr_change){ 2167 hci_stack->substate = HCI_INIT_SET_BD_ADDR; 2168 return; 2169 } 2170 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 2171 return; 2172 #ifndef HAVE_HOST_CONTROLLER_API 2173 case HCI_INIT_W4_SEND_BAUD_CHANGE_BCM: 2174 if (need_baud_change){ 2175 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 2176 log_info("Local baud rate change to %" PRIu32 "(w4_send_baud_change_bcm))", baud_rate); 2177 hci_stack->hci_transport->set_baudrate(baud_rate); 2178 } 2179 if (need_addr_change){ 2180 hci_stack->substate = HCI_INIT_SET_BD_ADDR; 2181 return; 2182 } 2183 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 2184 return; 2185 case HCI_INIT_W4_SET_BD_ADDR: 2186 // for STLC2500D + ATWILC3000, bd addr change only gets active after sending reset command 2187 if ((hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_ST_MICROELECTRONICS) 2188 || (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_ATMEL_CORPORATION)){ 2189 hci_stack->substate = HCI_INIT_SEND_RESET_ST_WARM_BOOT; 2190 return; 2191 } 2192 // skipping st warm boot 2193 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 2194 return; 2195 case HCI_INIT_W4_SEND_RESET_ST_WARM_BOOT: 2196 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 2197 return; 2198 #endif 2199 2200 case HCI_INIT_DONE: 2201 // set state if we came here by fall through 2202 hci_stack->substate = HCI_INIT_DONE; 2203 return; 2204 2205 default: 2206 break; 2207 } 2208 hci_initializing_next_state(); 2209 } 2210 2211 static void hci_handle_connection_failed(hci_connection_t * conn, uint8_t status){ 2212 // CC2564C might emit Connection Complete for rejected incoming SCO connection 2213 // To prevent accidentally free'ing the HCI connection for the ACL connection, 2214 // check if we have been aware of the HCI connection 2215 switch (conn->state){ 2216 case SENT_CREATE_CONNECTION: 2217 case RECEIVED_CONNECTION_REQUEST: 2218 break; 2219 default: 2220 return; 2221 } 2222 2223 log_info("Outgoing connection to %s failed", bd_addr_to_str(conn->address)); 2224 bd_addr_t bd_address; 2225 (void)memcpy(&bd_address, conn->address, 6); 2226 2227 #ifdef ENABLE_CLASSIC 2228 // cache needed data 2229 int notify_dedicated_bonding_failed = conn->bonding_flags & BONDING_DEDICATED; 2230 #endif 2231 2232 // connection failed, remove entry 2233 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 2234 btstack_memory_hci_connection_free( conn ); 2235 2236 #ifdef ENABLE_CLASSIC 2237 // notify client if dedicated bonding 2238 if (notify_dedicated_bonding_failed){ 2239 log_info("hci notify_dedicated_bonding_failed"); 2240 hci_emit_dedicated_bonding_result(bd_address, status); 2241 } 2242 2243 // if authentication error, also delete link key 2244 if (status == ERROR_CODE_AUTHENTICATION_FAILURE) { 2245 gap_drop_link_key_for_bd_addr(bd_address); 2246 } 2247 #else 2248 UNUSED(status); 2249 #endif 2250 } 2251 2252 #ifdef ENABLE_CLASSIC 2253 static void hci_handle_remote_features_page_0(hci_connection_t * conn, const uint8_t * features){ 2254 // SSP Controller 2255 if (features[6] & (1 << 3)){ 2256 conn->bonding_flags |= BONDING_REMOTE_SUPPORTS_SSP_CONTROLLER; 2257 } 2258 // eSCO 2259 if (features[3] & (1<<7)){ 2260 conn->remote_supported_features[0] |= 1; 2261 } 2262 // Extended features 2263 if (features[7] & (1<<7)){ 2264 conn->remote_supported_features[0] |= 2; 2265 } 2266 } 2267 2268 static void hci_handle_remote_features_page_1(hci_connection_t * conn, const uint8_t * features){ 2269 // SSP Host 2270 if (features[0] & (1 << 0)){ 2271 conn->bonding_flags |= BONDING_REMOTE_SUPPORTS_SSP_HOST; 2272 } 2273 // SC Host 2274 if (features[0] & (1 << 3)){ 2275 conn->bonding_flags |= BONDING_REMOTE_SUPPORTS_SC_HOST; 2276 } 2277 } 2278 2279 static void hci_handle_remote_features_page_2(hci_connection_t * conn, const uint8_t * features){ 2280 // SC Controller 2281 if (features[1] & (1 << 0)){ 2282 conn->bonding_flags |= BONDING_REMOTE_SUPPORTS_SC_CONTROLLER; 2283 } 2284 } 2285 2286 static void hci_handle_remote_features_received(hci_connection_t * conn){ 2287 conn->bonding_flags &= ~BONDING_REMOTE_FEATURES_QUERY_ACTIVE; 2288 conn->bonding_flags |= BONDING_RECEIVED_REMOTE_FEATURES; 2289 log_info("Remote features %02x, bonding flags %x", conn->remote_supported_features[0], conn->bonding_flags); 2290 if (conn->bonding_flags & BONDING_DEDICATED){ 2291 conn->bonding_flags |= BONDING_SEND_AUTHENTICATE_REQUEST; 2292 } 2293 } 2294 static bool hci_remote_sc_enabled(hci_connection_t * connection){ 2295 const uint16_t sc_enabled_mask = BONDING_REMOTE_SUPPORTS_SC_HOST | BONDING_REMOTE_SUPPORTS_SC_CONTROLLER; 2296 return (connection->bonding_flags & sc_enabled_mask) == sc_enabled_mask; 2297 } 2298 2299 #endif 2300 2301 static void handle_event_for_current_stack_state(const uint8_t * packet, uint16_t size) { 2302 // handle BT initialization 2303 if (hci_stack->state == HCI_STATE_INITIALIZING) { 2304 hci_initializing_event_handler(packet, size); 2305 } 2306 2307 // help with BT sleep 2308 if ((hci_stack->state == HCI_STATE_FALLING_ASLEEP) 2309 && (hci_stack->substate == HCI_FALLING_ASLEEP_W4_WRITE_SCAN_ENABLE) 2310 && (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_write_scan_enable))) { 2311 hci_initializing_next_state(); 2312 } 2313 } 2314 2315 #ifdef ENABLE_CLASSIC 2316 static void hci_handle_read_encryption_key_size_complete(hci_connection_t * conn, uint8_t encryption_key_size) { 2317 conn->authentication_flags |= AUTH_FLAG_CONNECTION_ENCRYPTED; 2318 conn->encryption_key_size = encryption_key_size; 2319 2320 if ((conn->authentication_flags & AUTH_FLAG_CONNECTION_AUTHENTICATED) != 0) { 2321 conn->requested_security_level = LEVEL_0; 2322 hci_emit_security_level(conn->con_handle, gap_security_level_for_connection(conn)); 2323 return; 2324 } 2325 2326 // Request remote features if not already done 2327 hci_trigger_remote_features_for_connection(conn); 2328 2329 // Request Authentication if not already done 2330 if ((conn->bonding_flags & BONDING_SENT_AUTHENTICATE_REQUEST) != 0) return; 2331 conn->bonding_flags |= BONDING_SEND_AUTHENTICATE_REQUEST; 2332 } 2333 #endif 2334 2335 static void hci_store_local_supported_commands(const uint8_t * packet){ 2336 // create mapping table 2337 #define X(name, offset, bit) { offset, bit }, 2338 static struct { 2339 uint8_t byte_offset; 2340 uint8_t bit_position; 2341 } supported_hci_commands_map [] = { 2342 SUPPORTED_HCI_COMMANDS 2343 }; 2344 #undef X 2345 2346 // create names for debug purposes 2347 #ifdef ENABLE_LOG_DEBUG 2348 #define X(name, offset, bit) #name, 2349 static const char * command_names[] = { 2350 SUPPORTED_HCI_COMMANDS 2351 }; 2352 #undef X 2353 #endif 2354 2355 hci_stack->local_supported_commands = 0; 2356 const uint8_t * commands_map = &packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1]; 2357 uint16_t i; 2358 for (i = 0 ; i < SUPPORTED_HCI_COMMANDS_COUNT ; i++){ 2359 if ((commands_map[supported_hci_commands_map[i].byte_offset] & (1 << supported_hci_commands_map[i].bit_position)) != 0){ 2360 #ifdef ENABLE_LOG_DEBUG 2361 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); 2362 #else 2363 log_info("Command 0x%02x supported %u/%u", i, supported_hci_commands_map[i].byte_offset, supported_hci_commands_map[i].bit_position); 2364 #endif 2365 hci_stack->local_supported_commands |= (1LU << i); 2366 } 2367 } 2368 log_info("Local supported commands summary %04x", hci_stack->local_supported_commands); 2369 } 2370 2371 static void handle_command_complete_event(uint8_t * packet, uint16_t size){ 2372 UNUSED(size); 2373 2374 uint16_t manufacturer; 2375 #ifdef ENABLE_CLASSIC 2376 hci_con_handle_t handle; 2377 hci_connection_t * conn; 2378 uint8_t status; 2379 #endif 2380 // get num cmd packets - limit to 1 to reduce complexity 2381 hci_stack->num_cmd_packets = packet[2] ? 1 : 0; 2382 2383 uint16_t opcode = hci_event_command_complete_get_command_opcode(packet); 2384 switch (opcode){ 2385 case HCI_OPCODE_HCI_READ_LOCAL_NAME: 2386 if (packet[5]) break; 2387 // terminate, name 248 chars 2388 packet[6+248] = 0; 2389 log_info("local name: %s", &packet[6]); 2390 break; 2391 case HCI_OPCODE_HCI_READ_BUFFER_SIZE: 2392 // "The HC_ACL_Data_Packet_Length return parameter will be used to determine the size of the L2CAP segments contained in ACL Data Packets" 2393 if (hci_stack->state == HCI_STATE_INITIALIZING) { 2394 uint16_t acl_len = little_endian_read_16(packet, 6); 2395 uint16_t sco_len = packet[8]; 2396 2397 // determine usable ACL/SCO payload size 2398 hci_stack->acl_data_packet_length = btstack_min(acl_len, HCI_ACL_PAYLOAD_SIZE); 2399 hci_stack->sco_data_packet_length = btstack_min(sco_len, HCI_ACL_PAYLOAD_SIZE); 2400 2401 hci_stack->acl_packets_total_num = little_endian_read_16(packet, 9); 2402 hci_stack->sco_packets_total_num = little_endian_read_16(packet, 11); 2403 2404 log_info("hci_read_buffer_size: ACL size module %u -> used %u, count %u / SCO size %u, count %u", 2405 acl_len, hci_stack->acl_data_packet_length, hci_stack->acl_packets_total_num, 2406 hci_stack->sco_data_packet_length, hci_stack->sco_packets_total_num); 2407 } 2408 break; 2409 case HCI_OPCODE_HCI_READ_RSSI: 2410 if (packet[5] == ERROR_CODE_SUCCESS){ 2411 uint8_t event[5]; 2412 event[0] = GAP_EVENT_RSSI_MEASUREMENT; 2413 event[1] = 3; 2414 (void)memcpy(&event[2], &packet[6], 3); 2415 hci_emit_event(event, sizeof(event), 1); 2416 } 2417 break; 2418 #ifdef ENABLE_BLE 2419 case HCI_OPCODE_HCI_LE_READ_BUFFER_SIZE_V2: 2420 hci_stack->le_iso_packets_length = little_endian_read_16(packet, 9); 2421 hci_stack->le_iso_packets_total_num = packet[11]; 2422 log_info("hci_le_read_buffer_size_v2: iso size %u, iso count %u", 2423 hci_stack->le_iso_packets_length, hci_stack->le_iso_packets_total_num); 2424 2425 /* fall through */ 2426 2427 case HCI_OPCODE_HCI_LE_READ_BUFFER_SIZE: 2428 hci_stack->le_data_packets_length = little_endian_read_16(packet, 6); 2429 hci_stack->le_acl_packets_total_num = packet[8]; 2430 // determine usable ACL payload size 2431 if (HCI_ACL_PAYLOAD_SIZE < hci_stack->le_data_packets_length){ 2432 hci_stack->le_data_packets_length = HCI_ACL_PAYLOAD_SIZE; 2433 } 2434 log_info("hci_le_read_buffer_size: acl size %u, acl count %u", hci_stack->le_data_packets_length, hci_stack->le_acl_packets_total_num); 2435 break; 2436 #endif 2437 #ifdef ENABLE_LE_DATA_LENGTH_EXTENSION 2438 case HCI_OPCODE_HCI_LE_READ_MAXIMUM_DATA_LENGTH: 2439 hci_stack->le_supported_max_tx_octets = little_endian_read_16(packet, 6); 2440 hci_stack->le_supported_max_tx_time = little_endian_read_16(packet, 8); 2441 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); 2442 break; 2443 #endif 2444 #ifdef ENABLE_LE_CENTRAL 2445 case HCI_OPCODE_HCI_LE_READ_WHITE_LIST_SIZE: 2446 hci_stack->le_whitelist_capacity = packet[6]; 2447 log_info("hci_le_read_white_list_size: size %u", hci_stack->le_whitelist_capacity); 2448 break; 2449 #endif 2450 #ifdef ENABLE_LE_PERIPHERAL 2451 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 2452 case HCI_OPCODE_HCI_LE_READ_MAXIMUM_ADVERTISING_DATA_LENGTH: 2453 hci_stack->le_maximum_advertising_data_length = little_endian_read_16(packet, 6); 2454 break; 2455 case HCI_OPCODE_HCI_LE_SET_EXTENDED_ADVERTISING_PARAMETERS: 2456 if (hci_stack->le_advertising_set_in_current_command != 0) { 2457 le_advertising_set_t * advertising_set = hci_advertising_set_for_handle(hci_stack->le_advertising_set_in_current_command); 2458 hci_stack->le_advertising_set_in_current_command = 0; 2459 if (advertising_set == NULL) break; 2460 uint8_t adv_status = packet[6]; 2461 uint8_t tx_power = packet[7]; 2462 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 }; 2463 if (adv_status == 0){ 2464 advertising_set->state |= LE_ADVERTISEMENT_STATE_PARAMS_SET; 2465 } 2466 hci_emit_event(event, sizeof(event), 1); 2467 } 2468 break; 2469 case HCI_OPCODE_HCI_LE_REMOVE_ADVERTISING_SET: 2470 if (hci_stack->le_advertising_set_in_current_command != 0) { 2471 le_advertising_set_t * advertising_set = hci_advertising_set_for_handle(hci_stack->le_advertising_set_in_current_command); 2472 hci_stack->le_advertising_set_in_current_command = 0; 2473 if (advertising_set == NULL) break; 2474 uint8_t adv_status = packet[5]; 2475 uint8_t event[] = { HCI_EVENT_META_GAP, 3, GAP_SUBEVENT_ADVERTISING_SET_REMOVED, hci_stack->le_advertising_set_in_current_command, adv_status }; 2476 if (adv_status == 0){ 2477 btstack_linked_list_remove(&hci_stack->le_advertising_sets, (btstack_linked_item_t *) advertising_set); 2478 } 2479 hci_emit_event(event, sizeof(event), 1); 2480 } 2481 break; 2482 #endif 2483 #endif 2484 case HCI_OPCODE_HCI_READ_BD_ADDR: 2485 reverse_bd_addr(&packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE + 1], hci_stack->local_bd_addr); 2486 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)); 2487 #ifdef ENABLE_CLASSIC 2488 if (hci_stack->link_key_db){ 2489 hci_stack->link_key_db->set_local_bd_addr(hci_stack->local_bd_addr); 2490 } 2491 #endif 2492 break; 2493 #ifdef ENABLE_CLASSIC 2494 case HCI_OPCODE_HCI_WRITE_SCAN_ENABLE: 2495 hci_emit_discoverable_enabled(hci_stack->discoverable); 2496 break; 2497 case HCI_OPCODE_HCI_INQUIRY_CANCEL: 2498 if (hci_stack->inquiry_state == GAP_INQUIRY_STATE_W4_CANCELLED){ 2499 hci_stack->inquiry_state = GAP_INQUIRY_STATE_IDLE; 2500 uint8_t event[] = { GAP_EVENT_INQUIRY_COMPLETE, 1, 0}; 2501 hci_emit_event(event, sizeof(event), 1); 2502 } 2503 break; 2504 #endif 2505 case HCI_OPCODE_HCI_READ_LOCAL_SUPPORTED_FEATURES: 2506 (void)memcpy(hci_stack->local_supported_features, &packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE + 1], 8); 2507 2508 #ifdef ENABLE_CLASSIC 2509 // determine usable ACL packet types based on host buffer size and supported features 2510 hci_stack->packet_types = hci_acl_packet_types_for_buffer_size_and_local_features(HCI_ACL_PAYLOAD_SIZE, &hci_stack->local_supported_features[0]); 2511 log_info("Packet types %04x, eSCO %u", hci_stack->packet_types, hci_extended_sco_link_supported()); 2512 #endif 2513 // Classic/LE 2514 log_info("BR/EDR support %u, LE support %u", hci_classic_supported(), hci_le_supported()); 2515 break; 2516 case HCI_OPCODE_HCI_READ_LOCAL_VERSION_INFORMATION: 2517 manufacturer = little_endian_read_16(packet, 10); 2518 // map Cypress to Broadcom 2519 if (manufacturer == BLUETOOTH_COMPANY_ID_CYPRESS_SEMICONDUCTOR){ 2520 log_info("Treat Cypress as Broadcom"); 2521 manufacturer = BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION; 2522 little_endian_store_16(packet, 10, manufacturer); 2523 } 2524 hci_stack->manufacturer = manufacturer; 2525 log_info("Manufacturer: 0x%04x", hci_stack->manufacturer); 2526 break; 2527 case HCI_OPCODE_HCI_READ_LOCAL_SUPPORTED_COMMANDS: 2528 hci_store_local_supported_commands(packet); 2529 break; 2530 #ifdef ENABLE_CLASSIC 2531 case HCI_OPCODE_HCI_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE: 2532 if (packet[5]) return; 2533 hci_stack->synchronous_flow_control_enabled = 1; 2534 break; 2535 case HCI_OPCODE_HCI_READ_ENCRYPTION_KEY_SIZE: 2536 status = packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE]; 2537 handle = little_endian_read_16(packet, OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1); 2538 conn = hci_connection_for_handle(handle); 2539 if (conn != NULL) { 2540 uint8_t key_size = 0; 2541 if (status == 0){ 2542 key_size = packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+3]; 2543 log_info("Handle %04x key Size: %u", handle, key_size); 2544 } else { 2545 key_size = 1; 2546 log_info("Read Encryption Key Size failed 0x%02x-> assuming insecure connection with key size of 1", status); 2547 } 2548 hci_handle_read_encryption_key_size_complete(conn, key_size); 2549 } 2550 break; 2551 // assert pairing complete event is emitted. 2552 // note: for SSP, Simple Pairing Complete Event is sufficient, but we want to be more robust 2553 case HCI_OPCODE_HCI_PIN_CODE_REQUEST_NEGATIVE_REPLY: 2554 case HCI_OPCODE_HCI_USER_PASSKEY_REQUEST_NEGATIVE_REPLY: 2555 case HCI_OPCODE_HCI_USER_CONFIRMATION_REQUEST_NEGATIVE_REPLY: 2556 hci_stack->gap_pairing_state = GAP_PAIRING_STATE_IDLE; 2557 // lookup connection by gap pairing addr 2558 conn = hci_connection_for_bd_addr_and_type(hci_stack->gap_pairing_addr, BD_ADDR_TYPE_ACL); 2559 if (conn == NULL) break; 2560 hci_pairing_complete(conn, ERROR_CODE_AUTHENTICATION_FAILURE); 2561 break; 2562 2563 #ifdef ENABLE_CLASSIC_PAIRING_OOB 2564 case HCI_OPCODE_HCI_READ_LOCAL_OOB_DATA: 2565 case HCI_OPCODE_HCI_READ_LOCAL_EXTENDED_OOB_DATA:{ 2566 uint8_t event[67]; 2567 event[0] = GAP_EVENT_LOCAL_OOB_DATA; 2568 event[1] = 65; 2569 (void)memset(&event[2], 0, 65); 2570 if (packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE] == ERROR_CODE_SUCCESS){ 2571 (void)memcpy(&event[3], &packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1], 32); 2572 if (opcode == HCI_OPCODE_HCI_READ_LOCAL_EXTENDED_OOB_DATA){ 2573 event[2] = 3; 2574 (void)memcpy(&event[35], &packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+33], 32); 2575 } else { 2576 event[2] = 1; 2577 } 2578 } 2579 hci_emit_event(event, sizeof(event), 0); 2580 break; 2581 } 2582 2583 // note: only needed if user does not provide OOB data 2584 case HCI_OPCODE_HCI_REMOTE_OOB_DATA_REQUEST_NEGATIVE_REPLY: 2585 conn = hci_connection_for_handle(hci_stack->classic_oob_con_handle); 2586 hci_stack->classic_oob_con_handle = HCI_CON_HANDLE_INVALID; 2587 if (conn == NULL) break; 2588 hci_pairing_complete(conn, ERROR_CODE_AUTHENTICATION_FAILURE); 2589 break; 2590 #endif 2591 #endif 2592 default: 2593 break; 2594 } 2595 } 2596 2597 #ifdef ENABLE_BLE 2598 static void event_handle_le_connection_complete(const uint8_t * packet){ 2599 bd_addr_t addr; 2600 bd_addr_type_t addr_type; 2601 hci_connection_t * conn; 2602 2603 // Connection management 2604 reverse_bd_addr(&packet[8], addr); 2605 addr_type = (bd_addr_type_t)packet[7]; 2606 log_info("LE Connection_complete (status=%u) type %u, %s", packet[3], addr_type, bd_addr_to_str(addr)); 2607 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 2608 2609 #ifdef ENABLE_LE_CENTRAL 2610 // handle error: error is reported only to the initiator -> outgoing connection 2611 if (packet[3]){ 2612 2613 // handle cancelled outgoing connection 2614 // "If the cancellation was successful then, after the Command Complete event for the LE_Create_Connection_Cancel command, 2615 // either an LE Connection Complete or an LE Enhanced Connection Complete event shall be generated. 2616 // In either case, the event shall be sent with the error code Unknown Connection Identifier (0x02)." 2617 if (packet[3] == ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER){ 2618 // reset state 2619 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 2620 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 2621 // get outgoing connection conn struct for direct connect 2622 conn = gap_get_outgoing_connection(); 2623 } 2624 2625 // outgoing le connection establishment is done 2626 if (conn){ 2627 // remove entry 2628 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 2629 btstack_memory_hci_connection_free( conn ); 2630 } 2631 return; 2632 } 2633 #endif 2634 2635 // on success, both hosts receive connection complete event 2636 if (packet[6] == HCI_ROLE_MASTER){ 2637 #ifdef ENABLE_LE_CENTRAL 2638 // if we're master on an le connection, it was an outgoing connection and we're done with it 2639 // note: no hci_connection_t object exists yet for connect with whitelist 2640 if (hci_is_le_connection_type(addr_type)){ 2641 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 2642 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 2643 } 2644 #endif 2645 } else { 2646 #ifdef ENABLE_LE_PERIPHERAL 2647 // if we're slave, it was an incoming connection, advertisements have stopped 2648 hci_stack->le_advertisements_state &= ~LE_ADVERTISEMENT_STATE_ACTIVE; 2649 #endif 2650 } 2651 2652 // LE connections are auto-accepted, so just create a connection if there isn't one already 2653 if (!conn){ 2654 conn = create_connection_for_bd_addr_and_type(addr, addr_type); 2655 } 2656 2657 // no memory, sorry. 2658 if (!conn){ 2659 return; 2660 } 2661 2662 conn->state = OPEN; 2663 conn->role = packet[6]; 2664 conn->con_handle = hci_subevent_le_connection_complete_get_connection_handle(packet); 2665 conn->le_connection_interval = hci_subevent_le_connection_complete_get_conn_interval(packet); 2666 2667 #ifdef ENABLE_LE_PERIPHERAL 2668 if (packet[6] == HCI_ROLE_SLAVE){ 2669 hci_update_advertisements_enabled_for_current_roles(); 2670 } 2671 #endif 2672 2673 // init unenhanced att bearer mtu 2674 conn->att_connection.mtu = ATT_DEFAULT_MTU; 2675 conn->att_connection.mtu_exchanged = false; 2676 2677 // TODO: store - role, peer address type, conn_interval, conn_latency, supervision timeout, master clock 2678 2679 // restart timer 2680 // btstack_run_loop_set_timer(&conn->timeout, HCI_CONNECTION_TIMEOUT_MS); 2681 // btstack_run_loop_add_timer(&conn->timeout); 2682 2683 log_info("New connection: handle %u, %s", conn->con_handle, bd_addr_to_str(conn->address)); 2684 2685 hci_emit_nr_connections_changed(); 2686 } 2687 #endif 2688 2689 #ifdef ENABLE_CLASSIC 2690 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){ 2691 if (io_cap_local == SSP_IO_CAPABILITY_UNKNOWN) return false; 2692 // LEVEL_4 is tested by l2cap 2693 // LEVEL 3 requires MITM protection -> check io capabilities if Authenticated is possible 2694 // @see: Core Spec v5.3, Vol 3, Part C, Table 5.7 2695 if (level >= LEVEL_3){ 2696 // MITM not possible without keyboard or display 2697 if (io_cap_remote >= SSP_IO_CAPABILITY_NO_INPUT_NO_OUTPUT) return false; 2698 if (io_cap_local >= SSP_IO_CAPABILITY_NO_INPUT_NO_OUTPUT) return false; 2699 2700 // MITM possible if one side has keyboard and the other has keyboard or display 2701 if (io_cap_remote == SSP_IO_CAPABILITY_KEYBOARD_ONLY) return true; 2702 if (io_cap_local == SSP_IO_CAPABILITY_KEYBOARD_ONLY) return true; 2703 2704 // MITM not possible if one side has only display and other side has no keyboard 2705 if (io_cap_remote == SSP_IO_CAPABILITY_DISPLAY_ONLY) return false; 2706 if (io_cap_local == SSP_IO_CAPABILITY_DISPLAY_ONLY) return false; 2707 } 2708 // LEVEL 2 requires SSP, which is a given 2709 return true; 2710 } 2711 2712 static bool btstack_is_null(uint8_t * data, uint16_t size){ 2713 uint16_t i; 2714 for (i=0; i < size ; i++){ 2715 if (data[i] != 0) { 2716 return false; 2717 } 2718 } 2719 return true; 2720 } 2721 2722 static void hci_ssp_assess_security_on_io_cap_request(hci_connection_t * conn){ 2723 // get requested security level 2724 gap_security_level_t requested_security_level = conn->requested_security_level; 2725 if (hci_stack->gap_secure_connections_only_mode){ 2726 requested_security_level = LEVEL_4; 2727 } 2728 2729 // assess security: LEVEL 4 requires SC 2730 // skip this preliminary test if remote features are not available yet to work around potential issue in ESP32 controller 2731 if ((requested_security_level == LEVEL_4) && 2732 ((conn->bonding_flags & BONDING_RECEIVED_REMOTE_FEATURES) != 0) && 2733 !hci_remote_sc_enabled(conn)){ 2734 log_info("Level 4 required, but SC not supported -> abort"); 2735 hci_pairing_complete(conn, ERROR_CODE_INSUFFICIENT_SECURITY); 2736 connectionSetAuthenticationFlags(conn, AUTH_FLAG_SEND_IO_CAPABILITIES_NEGATIVE_REPLY); 2737 return; 2738 } 2739 2740 // assess security based on io capabilities 2741 if (conn->authentication_flags & AUTH_FLAG_RECV_IO_CAPABILITIES_RESPONSE){ 2742 // responder: fully validate io caps of both sides as well as OOB data 2743 bool security_possible = false; 2744 security_possible = hci_ssp_security_level_possible_for_io_cap(requested_security_level, hci_stack->ssp_io_capability, conn->io_cap_response_io); 2745 2746 #ifdef ENABLE_CLASSIC_PAIRING_OOB 2747 // We assume that both Controller can reach LEVEL 4, if one side has received P-192 and the other has received P-256, 2748 // so we merge the OOB data availability 2749 uint8_t have_oob_data = conn->io_cap_response_oob_data; 2750 if (conn->classic_oob_c_192 != NULL){ 2751 have_oob_data |= 1; 2752 } 2753 if (conn->classic_oob_c_256 != NULL){ 2754 have_oob_data |= 2; 2755 } 2756 // for up to Level 3, either P-192 as well as P-256 will do 2757 // 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 2758 // if remote does not SC, we should not receive P-256 data either 2759 if ((requested_security_level <= LEVEL_3) && (have_oob_data != 0)){ 2760 security_possible = true; 2761 } 2762 // for Level 4, P-256 is needed 2763 if ((requested_security_level == LEVEL_4 && ((have_oob_data & 2) != 0))){ 2764 security_possible = true; 2765 } 2766 #endif 2767 2768 if (security_possible == false){ 2769 log_info("IOCap/OOB insufficient for level %u -> abort", requested_security_level); 2770 hci_pairing_complete(conn, ERROR_CODE_INSUFFICIENT_SECURITY); 2771 connectionSetAuthenticationFlags(conn, AUTH_FLAG_SEND_IO_CAPABILITIES_NEGATIVE_REPLY); 2772 return; 2773 } 2774 } else { 2775 // initiator: remote io cap not yet, only check if we have ability for MITM protection if requested and OOB is not supported 2776 #ifndef ENABLE_CLASSIC_PAIRING_OOB 2777 #ifndef ENABLE_EXPLICIT_IO_CAPABILITIES_REPLY 2778 if ((conn->requested_security_level >= LEVEL_3) && (hci_stack->ssp_io_capability >= SSP_IO_CAPABILITY_NO_INPUT_NO_OUTPUT)){ 2779 log_info("Level 3+ required, but no input/output -> abort"); 2780 hci_pairing_complete(conn, ERROR_CODE_INSUFFICIENT_SECURITY); 2781 connectionSetAuthenticationFlags(conn, AUTH_FLAG_SEND_IO_CAPABILITIES_NEGATIVE_REPLY); 2782 return; 2783 } 2784 #endif 2785 #endif 2786 } 2787 2788 #ifndef ENABLE_EXPLICIT_IO_CAPABILITIES_REPLY 2789 if (hci_stack->ssp_io_capability != SSP_IO_CAPABILITY_UNKNOWN){ 2790 connectionSetAuthenticationFlags(conn, AUTH_FLAG_SEND_IO_CAPABILITIES_REPLY); 2791 } else { 2792 connectionSetAuthenticationFlags(conn, AUTH_FLAG_SEND_IO_CAPABILITIES_NEGATIVE_REPLY); 2793 } 2794 #endif 2795 } 2796 2797 #endif 2798 2799 static void event_handler(uint8_t *packet, uint16_t size){ 2800 2801 uint16_t event_length = packet[1]; 2802 2803 // assert packet is complete 2804 if (size != (event_length + 2u)){ 2805 log_error("event_handler called with packet of wrong size %d, expected %u => dropping packet", size, event_length + 2); 2806 return; 2807 } 2808 2809 bd_addr_type_t addr_type; 2810 hci_con_handle_t handle; 2811 hci_connection_t * conn; 2812 int i; 2813 int create_connection_cmd; 2814 2815 #ifdef ENABLE_CLASSIC 2816 hci_link_type_t link_type; 2817 bd_addr_t addr; 2818 #endif 2819 2820 // log_info("HCI:EVENT:%02x", hci_event_packet_get_type(packet)); 2821 2822 switch (hci_event_packet_get_type(packet)) { 2823 2824 case HCI_EVENT_COMMAND_COMPLETE: 2825 handle_command_complete_event(packet, size); 2826 break; 2827 2828 case HCI_EVENT_COMMAND_STATUS: 2829 // get num cmd packets - limit to 1 to reduce complexity 2830 hci_stack->num_cmd_packets = packet[3] ? 1 : 0; 2831 2832 // check command status to detected failed outgoing connections 2833 create_connection_cmd = 0; 2834 #ifdef ENABLE_CLASSIC 2835 if (HCI_EVENT_IS_COMMAND_STATUS(packet, hci_create_connection)){ 2836 create_connection_cmd = 1; 2837 } 2838 if (HCI_EVENT_IS_COMMAND_STATUS(packet, hci_accept_synchronous_connection)){ 2839 create_connection_cmd = 1; 2840 } 2841 #endif 2842 #ifdef ENABLE_LE_CENTRAL 2843 if (HCI_EVENT_IS_COMMAND_STATUS(packet, hci_le_create_connection)){ 2844 create_connection_cmd = 1; 2845 } 2846 #endif 2847 if (create_connection_cmd) { 2848 uint8_t status = hci_event_command_status_get_status(packet); 2849 addr_type = hci_stack->outgoing_addr_type; 2850 conn = hci_connection_for_bd_addr_and_type(hci_stack->outgoing_addr, addr_type); 2851 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); 2852 2853 // reset outgoing address info 2854 memset(hci_stack->outgoing_addr, 0, 6); 2855 hci_stack->outgoing_addr_type = BD_ADDR_TYPE_UNKNOWN; 2856 2857 // on error 2858 if (status != ERROR_CODE_SUCCESS){ 2859 #ifdef ENABLE_LE_CENTRAL 2860 if (hci_is_le_connection_type(addr_type)){ 2861 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 2862 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 2863 } 2864 #endif 2865 // error => outgoing connection failed 2866 if (conn != NULL){ 2867 hci_handle_connection_failed(conn, status); 2868 } 2869 } 2870 } 2871 2872 #ifdef ENABLE_CLASSIC 2873 if (HCI_EVENT_IS_COMMAND_STATUS(packet, hci_inquiry)) { 2874 uint8_t status = hci_event_command_status_get_status(packet); 2875 log_info("command status (inquiry), status %x", status); 2876 if (status == ERROR_CODE_SUCCESS) { 2877 hci_stack->inquiry_state = GAP_INQUIRY_STATE_ACTIVE; 2878 } else { 2879 hci_stack->inquiry_state = GAP_INQUIRY_STATE_IDLE; 2880 } 2881 } 2882 #endif 2883 break; 2884 2885 case HCI_EVENT_NUMBER_OF_COMPLETED_PACKETS:{ 2886 if (size < 3) return; 2887 uint16_t num_handles = packet[2]; 2888 if (size != (3u + num_handles * 4u)) return; 2889 uint16_t offset = 3; 2890 for (i=0; i<num_handles;i++){ 2891 handle = little_endian_read_16(packet, offset) & 0x0fffu; 2892 offset += 2u; 2893 uint16_t num_packets = little_endian_read_16(packet, offset); 2894 offset += 2u; 2895 2896 conn = hci_connection_for_handle(handle); 2897 if (!conn){ 2898 log_error("hci_number_completed_packet lists unused con handle %u", handle); 2899 continue; 2900 } 2901 2902 if (conn->num_packets_sent >= num_packets){ 2903 conn->num_packets_sent -= num_packets; 2904 } else { 2905 log_error("hci_number_completed_packets, more packet slots freed then sent."); 2906 conn->num_packets_sent = 0; 2907 } 2908 // log_info("hci_number_completed_packet %u processed for handle %u, outstanding %u", num_packets, handle, conn->num_packets_sent); 2909 2910 #ifdef ENABLE_CLASSIC 2911 // For SCO, we do the can_send_now_check here 2912 hci_notify_if_sco_can_send_now(); 2913 #endif 2914 } 2915 break; 2916 } 2917 2918 #ifdef ENABLE_CLASSIC 2919 case HCI_EVENT_FLUSH_OCCURRED: 2920 // flush occurs only if automatic flush has been enabled by gap_enable_link_watchdog() 2921 handle = hci_event_flush_occurred_get_handle(packet); 2922 conn = hci_connection_for_handle(handle); 2923 if (conn) { 2924 log_info("Flush occurred, disconnect 0x%04x", handle); 2925 conn->state = SEND_DISCONNECT; 2926 } 2927 break; 2928 2929 case HCI_EVENT_INQUIRY_COMPLETE: 2930 if (hci_stack->inquiry_state == GAP_INQUIRY_STATE_ACTIVE){ 2931 hci_stack->inquiry_state = GAP_INQUIRY_STATE_IDLE; 2932 uint8_t event[] = { GAP_EVENT_INQUIRY_COMPLETE, 1, 0}; 2933 hci_emit_event(event, sizeof(event), 1); 2934 } 2935 break; 2936 case HCI_EVENT_REMOTE_NAME_REQUEST_COMPLETE: 2937 if (hci_stack->remote_name_state == GAP_REMOTE_NAME_STATE_W4_COMPLETE){ 2938 hci_stack->remote_name_state = GAP_REMOTE_NAME_STATE_IDLE; 2939 } 2940 break; 2941 case HCI_EVENT_CONNECTION_REQUEST: 2942 reverse_bd_addr(&packet[2], addr); 2943 link_type = (hci_link_type_t) packet[11]; 2944 2945 // CVE-2020-26555: reject incoming connection from device with same BD ADDR 2946 if (memcmp(hci_stack->local_bd_addr, addr, 6) == 0){ 2947 hci_stack->decline_reason = ERROR_CODE_CONNECTION_REJECTED_DUE_TO_UNACCEPTABLE_BD_ADDR; 2948 bd_addr_copy(hci_stack->decline_addr, addr); 2949 break; 2950 } 2951 2952 if (hci_stack->gap_classic_accept_callback != NULL){ 2953 if ((*hci_stack->gap_classic_accept_callback)(addr, link_type) == 0){ 2954 hci_stack->decline_reason = ERROR_CODE_CONNECTION_REJECTED_DUE_TO_UNACCEPTABLE_BD_ADDR; 2955 bd_addr_copy(hci_stack->decline_addr, addr); 2956 break; 2957 } 2958 } 2959 2960 // TODO: eval COD 8-10 2961 log_info("Connection_incoming: %s, type %u", bd_addr_to_str(addr), (unsigned int) link_type); 2962 addr_type = (link_type == HCI_LINK_TYPE_ACL) ? BD_ADDR_TYPE_ACL : BD_ADDR_TYPE_SCO; 2963 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 2964 if (!conn) { 2965 conn = create_connection_for_bd_addr_and_type(addr, addr_type); 2966 } 2967 if (!conn) { 2968 // CONNECTION REJECTED DUE TO LIMITED RESOURCES (0X0D) 2969 hci_stack->decline_reason = ERROR_CODE_CONNECTION_REJECTED_DUE_TO_LIMITED_RESOURCES; 2970 bd_addr_copy(hci_stack->decline_addr, addr); 2971 hci_run(); 2972 // avoid event to higher layer 2973 return; 2974 } 2975 conn->role = HCI_ROLE_SLAVE; 2976 conn->state = RECEIVED_CONNECTION_REQUEST; 2977 // store info about eSCO 2978 if (link_type == HCI_LINK_TYPE_ESCO){ 2979 conn->remote_supported_features[0] |= 1; 2980 } 2981 hci_run(); 2982 break; 2983 2984 case HCI_EVENT_CONNECTION_COMPLETE: 2985 // Connection management 2986 reverse_bd_addr(&packet[5], addr); 2987 log_info("Connection_complete (status=%u) %s", packet[2], bd_addr_to_str(addr)); 2988 addr_type = BD_ADDR_TYPE_ACL; 2989 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 2990 if (conn) { 2991 if (!packet[2]){ 2992 conn->state = OPEN; 2993 conn->con_handle = little_endian_read_16(packet, 3); 2994 2995 // trigger write supervision timeout if we're master 2996 if ((hci_stack->link_supervision_timeout != HCI_LINK_SUPERVISION_TIMEOUT_DEFAULT) && (conn->role == HCI_ROLE_MASTER)){ 2997 conn->gap_connection_tasks |= GAP_CONNECTION_TASK_WRITE_SUPERVISION_TIMEOUT; 2998 } 2999 3000 // trigger write automatic flush timeout 3001 if (hci_stack->automatic_flush_timeout != 0){ 3002 conn->gap_connection_tasks |= GAP_CONNECTION_TASK_WRITE_AUTOMATIC_FLUSH_TIMEOUT; 3003 } 3004 3005 // restart timer 3006 btstack_run_loop_set_timer(&conn->timeout, HCI_CONNECTION_TIMEOUT_MS); 3007 btstack_run_loop_add_timer(&conn->timeout); 3008 3009 // trigger remote features for dedicated bonding 3010 if ((conn->bonding_flags & BONDING_DEDICATED) != 0){ 3011 hci_trigger_remote_features_for_connection(conn); 3012 } 3013 3014 log_info("New connection: handle %u, %s", conn->con_handle, bd_addr_to_str(conn->address)); 3015 3016 hci_emit_nr_connections_changed(); 3017 } else { 3018 // connection failed 3019 hci_handle_connection_failed(conn, packet[2]); 3020 } 3021 } 3022 break; 3023 3024 case HCI_EVENT_SYNCHRONOUS_CONNECTION_COMPLETE: 3025 reverse_bd_addr(&packet[5], addr); 3026 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_SCO); 3027 log_info("Synchronous Connection Complete for %p (status=%u) %s", conn, packet[2], bd_addr_to_str(addr)); 3028 if (packet[2]){ 3029 // connection failed 3030 if (conn){ 3031 hci_handle_connection_failed(conn, packet[2]); 3032 } 3033 break; 3034 } 3035 if (!conn) { 3036 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_SCO); 3037 } 3038 if (!conn) { 3039 break; 3040 } 3041 conn->state = OPEN; 3042 conn->con_handle = little_endian_read_16(packet, 3); 3043 3044 #ifdef ENABLE_SCO_OVER_HCI 3045 // update SCO 3046 if (conn->address_type == BD_ADDR_TYPE_SCO && hci_stack->hci_transport && hci_stack->hci_transport->set_sco_config){ 3047 hci_stack->hci_transport->set_sco_config(hci_stack->sco_voice_setting_active, hci_number_sco_connections()); 3048 } 3049 // trigger can send now 3050 if (hci_have_usb_transport()){ 3051 hci_stack->sco_can_send_now = true; 3052 } 3053 #endif 3054 #ifdef HAVE_SCO_TRANSPORT 3055 // configure sco transport 3056 if (hci_stack->sco_transport != NULL){ 3057 sco_format_t sco_format = ((hci_stack->sco_voice_setting_active & 0x03) == 0x03) ? SCO_FORMAT_8_BIT : SCO_FORMAT_16_BIT; 3058 hci_stack->sco_transport->open(conn->con_handle, sco_format); 3059 } 3060 #endif 3061 break; 3062 3063 case HCI_EVENT_READ_REMOTE_SUPPORTED_FEATURES_COMPLETE: 3064 handle = little_endian_read_16(packet, 3); 3065 conn = hci_connection_for_handle(handle); 3066 if (!conn) break; 3067 if (!packet[2]){ 3068 const uint8_t * features = &packet[5]; 3069 hci_handle_remote_features_page_0(conn, features); 3070 3071 // read extended features if possible 3072 if (hci_command_supported(SUPPORTED_HCI_COMMAND_READ_REMOTE_EXTENDED_FEATURES) 3073 && ((conn->remote_supported_features[0] & 2) != 0)) { 3074 conn->bonding_flags |= BONDING_REQUEST_REMOTE_FEATURES_PAGE_1; 3075 break; 3076 } 3077 } 3078 hci_handle_remote_features_received(conn); 3079 break; 3080 3081 case HCI_EVENT_READ_REMOTE_EXTENDED_FEATURES_COMPLETE: 3082 handle = little_endian_read_16(packet, 3); 3083 conn = hci_connection_for_handle(handle); 3084 if (!conn) break; 3085 // status = ok, page = 1 3086 if (!packet[2]) { 3087 uint8_t page_number = packet[5]; 3088 uint8_t maximum_page_number = packet[6]; 3089 const uint8_t * features = &packet[7]; 3090 bool done = false; 3091 switch (page_number){ 3092 case 1: 3093 hci_handle_remote_features_page_1(conn, features); 3094 if (maximum_page_number >= 2){ 3095 // get Secure Connections (Controller) from Page 2 if available 3096 conn->bonding_flags |= BONDING_REQUEST_REMOTE_FEATURES_PAGE_2; 3097 } else { 3098 // otherwise, assume SC (Controller) == SC (Host) 3099 if ((conn->bonding_flags & BONDING_REMOTE_SUPPORTS_SC_HOST) != 0){ 3100 conn->bonding_flags |= BONDING_REMOTE_SUPPORTS_SC_CONTROLLER; 3101 } 3102 done = true; 3103 } 3104 break; 3105 case 2: 3106 hci_handle_remote_features_page_2(conn, features); 3107 done = true; 3108 break; 3109 default: 3110 break; 3111 } 3112 if (!done) break; 3113 } 3114 hci_handle_remote_features_received(conn); 3115 break; 3116 3117 case HCI_EVENT_LINK_KEY_REQUEST: 3118 #ifndef ENABLE_EXPLICIT_LINK_KEY_REPLY 3119 hci_event_link_key_request_get_bd_addr(packet, addr); 3120 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 3121 if (!conn) break; 3122 3123 // lookup link key in db if not cached 3124 if ((conn->link_key_type == INVALID_LINK_KEY) && (hci_stack->link_key_db != NULL)){ 3125 hci_stack->link_key_db->get_link_key(conn->address, conn->link_key, &conn->link_key_type); 3126 } 3127 3128 // response sent by hci_run() 3129 conn->authentication_flags |= AUTH_FLAG_HANDLE_LINK_KEY_REQUEST; 3130 #endif 3131 break; 3132 3133 case HCI_EVENT_LINK_KEY_NOTIFICATION: { 3134 hci_event_link_key_request_get_bd_addr(packet, addr); 3135 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 3136 if (!conn) break; 3137 3138 hci_pairing_complete(conn, ERROR_CODE_SUCCESS); 3139 3140 // CVE-2020-26555: ignore NULL link key 3141 // default link_key_type = INVALID_LINK_KEY asserts that NULL key won't be used for encryption 3142 if (btstack_is_null(&packet[8], 16)) break; 3143 3144 link_key_type_t link_key_type = (link_key_type_t)packet[24]; 3145 // Change Connection Encryption keeps link key type 3146 if (link_key_type != CHANGED_COMBINATION_KEY){ 3147 conn->link_key_type = link_key_type; 3148 } 3149 3150 // cache link key. link keys stored in little-endian format for legacy reasons 3151 memcpy(&conn->link_key, &packet[8], 16); 3152 3153 // only store link key: 3154 // - if bondable enabled 3155 if (hci_stack->bondable == false) break; 3156 // - if security level sufficient 3157 if (gap_security_level_for_link_key_type(link_key_type) < conn->requested_security_level) break; 3158 // - for SSP, also check if remote side requested bonding as well 3159 if (conn->link_key_type != COMBINATION_KEY){ 3160 bool remote_bonding = conn->io_cap_response_auth_req >= SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_DEDICATED_BONDING; 3161 if (!remote_bonding){ 3162 break; 3163 } 3164 } 3165 gap_store_link_key_for_bd_addr(addr, &packet[8], conn->link_key_type); 3166 break; 3167 } 3168 3169 case HCI_EVENT_PIN_CODE_REQUEST: 3170 hci_event_pin_code_request_get_bd_addr(packet, addr); 3171 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 3172 if (!conn) break; 3173 3174 hci_pairing_started(conn, false); 3175 // abort pairing if: non-bondable mode (pin code request is not forwarded to app) 3176 if (!hci_stack->bondable ){ 3177 conn->authentication_flags |= AUTH_FLAG_DENY_PIN_CODE_REQUEST; 3178 hci_pairing_complete(conn, ERROR_CODE_PAIRING_NOT_ALLOWED); 3179 hci_run(); 3180 return; 3181 } 3182 // abort pairing if: LEVEL_4 required (pin code request is not forwarded to app) 3183 if ((hci_stack->gap_secure_connections_only_mode) || (conn->requested_security_level == LEVEL_4)){ 3184 log_info("Level 4 required, but SC not supported -> abort"); 3185 conn->authentication_flags |= AUTH_FLAG_DENY_PIN_CODE_REQUEST; 3186 hci_pairing_complete(conn, ERROR_CODE_INSUFFICIENT_SECURITY); 3187 hci_run(); 3188 return; 3189 } 3190 break; 3191 3192 case HCI_EVENT_IO_CAPABILITY_RESPONSE: 3193 hci_event_io_capability_response_get_bd_addr(packet, addr); 3194 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 3195 if (!conn) break; 3196 3197 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], AUTH_FLAG_RECV_IO_CAPABILITIES_RESPONSE); 3198 hci_pairing_started(conn, true); 3199 conn->io_cap_response_auth_req = hci_event_io_capability_response_get_authentication_requirements(packet); 3200 conn->io_cap_response_io = hci_event_io_capability_response_get_io_capability(packet); 3201 #ifdef ENABLE_CLASSIC_PAIRING_OOB 3202 conn->io_cap_response_oob_data = hci_event_io_capability_response_get_oob_data_present(packet); 3203 #endif 3204 break; 3205 3206 case HCI_EVENT_IO_CAPABILITY_REQUEST: 3207 hci_event_io_capability_response_get_bd_addr(packet, addr); 3208 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 3209 if (!conn) break; 3210 3211 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], AUTH_FLAG_RECV_IO_CAPABILITIES_REQUEST); 3212 hci_connection_timestamp(conn); 3213 hci_pairing_started(conn, true); 3214 break; 3215 3216 #ifdef ENABLE_CLASSIC_PAIRING_OOB 3217 case HCI_EVENT_REMOTE_OOB_DATA_REQUEST: 3218 hci_event_remote_oob_data_request_get_bd_addr(packet, addr); 3219 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 3220 if (!conn) break; 3221 3222 hci_connection_timestamp(conn); 3223 3224 hci_pairing_started(conn, true); 3225 3226 connectionSetAuthenticationFlags(conn, AUTH_FLAG_SEND_REMOTE_OOB_DATA_REPLY); 3227 break; 3228 #endif 3229 3230 case HCI_EVENT_USER_CONFIRMATION_REQUEST: 3231 hci_event_user_confirmation_request_get_bd_addr(packet, addr); 3232 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 3233 if (!conn) break; 3234 if (hci_ssp_security_level_possible_for_io_cap(conn->requested_security_level, hci_stack->ssp_io_capability, conn->io_cap_response_io)) { 3235 if (hci_stack->ssp_auto_accept){ 3236 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], AUTH_FLAG_SEND_USER_CONFIRM_REPLY); 3237 }; 3238 } else { 3239 hci_pairing_complete(conn, ERROR_CODE_INSUFFICIENT_SECURITY); 3240 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], AUTH_FLAG_SEND_USER_CONFIRM_NEGATIVE_REPLY); 3241 // don't forward event to app 3242 hci_run(); 3243 return; 3244 } 3245 break; 3246 3247 case HCI_EVENT_USER_PASSKEY_REQUEST: 3248 // Pairing using Passkey results in MITM protection. If Level 4 is required, support for SC is validated on IO Cap Request 3249 if (hci_stack->ssp_auto_accept){ 3250 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], AUTH_FLAG_SEND_USER_PASSKEY_REPLY); 3251 }; 3252 break; 3253 3254 case HCI_EVENT_MODE_CHANGE: 3255 handle = hci_event_mode_change_get_handle(packet); 3256 conn = hci_connection_for_handle(handle); 3257 if (!conn) break; 3258 conn->connection_mode = hci_event_mode_change_get_mode(packet); 3259 log_info("HCI_EVENT_MODE_CHANGE, handle 0x%04x, mode %u", handle, conn->connection_mode); 3260 break; 3261 #endif 3262 3263 case HCI_EVENT_ENCRYPTION_CHANGE: 3264 handle = hci_event_encryption_change_get_connection_handle(packet); 3265 conn = hci_connection_for_handle(handle); 3266 if (!conn) break; 3267 if (hci_event_encryption_change_get_status(packet) == 0u) { 3268 uint8_t encryption_enabled = hci_event_encryption_change_get_encryption_enabled(packet); 3269 if (encryption_enabled){ 3270 if (hci_is_le_connection(conn)){ 3271 // For LE, we accept connection as encrypted 3272 conn->authentication_flags |= AUTH_FLAG_CONNECTION_ENCRYPTED; 3273 } 3274 #ifdef ENABLE_CLASSIC 3275 else { 3276 3277 // dedicated bonding: send result and disconnect 3278 if (conn->bonding_flags & BONDING_DEDICATED){ 3279 conn->bonding_flags &= ~BONDING_DEDICATED; 3280 conn->bonding_flags |= BONDING_DISCONNECT_DEDICATED_DONE; 3281 conn->bonding_status = packet[2]; 3282 break; 3283 } 3284 3285 // Detect Secure Connection -> Legacy Connection Downgrade Attack (BIAS) 3286 bool sc_used_during_pairing = gap_secure_connection_for_link_key_type(conn->link_key_type); 3287 bool connected_uses_aes_ccm = encryption_enabled == 2; 3288 if (hci_stack->secure_connections_active && sc_used_during_pairing && !connected_uses_aes_ccm){ 3289 log_info("SC during pairing, but only E0 now -> abort"); 3290 conn->bonding_flags |= BONDING_DISCONNECT_SECURITY_BLOCK; 3291 break; 3292 } 3293 3294 // if AES-CCM is used, authentication used SC -> authentication was mutual and we can skip explicit authentication 3295 if (connected_uses_aes_ccm){ 3296 conn->authentication_flags |= AUTH_FLAG_CONNECTION_AUTHENTICATED; 3297 } 3298 3299 #ifdef ENABLE_TESTING_SUPPORT 3300 // work around for issue with PTS dongle 3301 conn->authentication_flags |= AUTH_FLAG_CONNECTION_AUTHENTICATED; 3302 #endif 3303 if (hci_command_supported(SUPPORTED_HCI_COMMAND_READ_ENCRYPTION_KEY_SIZE)){ 3304 // For Classic, we need to validate encryption key size first, if possible (== supported by Controller) 3305 conn->bonding_flags |= BONDING_SEND_READ_ENCRYPTION_KEY_SIZE; 3306 } else { 3307 // if not, pretend everything is perfect 3308 hci_handle_read_encryption_key_size_complete(conn, 16); 3309 } 3310 } 3311 #endif 3312 } else { 3313 conn->authentication_flags &= ~AUTH_FLAG_CONNECTION_ENCRYPTED; 3314 } 3315 } 3316 3317 break; 3318 3319 #ifdef ENABLE_CLASSIC 3320 case HCI_EVENT_AUTHENTICATION_COMPLETE_EVENT: 3321 handle = hci_event_authentication_complete_get_connection_handle(packet); 3322 conn = hci_connection_for_handle(handle); 3323 if (!conn) break; 3324 3325 // clear authentication active flag 3326 conn->bonding_flags &= ~BONDING_SENT_AUTHENTICATE_REQUEST; 3327 hci_pairing_complete(conn, hci_event_authentication_complete_get_status(packet)); 3328 3329 // authenticated only if auth status == 0 3330 if (hci_event_authentication_complete_get_status(packet) == 0){ 3331 // authenticated 3332 conn->authentication_flags |= AUTH_FLAG_CONNECTION_AUTHENTICATED; 3333 3334 // If not already encrypted, start encryption 3335 if ((conn->authentication_flags & AUTH_FLAG_CONNECTION_ENCRYPTED) == 0){ 3336 conn->bonding_flags |= BONDING_SEND_ENCRYPTION_REQUEST; 3337 break; 3338 } 3339 } 3340 3341 // emit updated security level 3342 hci_emit_security_level(handle, gap_security_level_for_connection(conn)); 3343 break; 3344 3345 case HCI_EVENT_SIMPLE_PAIRING_COMPLETE: 3346 hci_event_simple_pairing_complete_get_bd_addr(packet, addr); 3347 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 3348 if (!conn) break; 3349 3350 // treat successfully paired connection as authenticated 3351 if (hci_event_simple_pairing_complete_get_status(packet) == ERROR_CODE_SUCCESS){ 3352 conn->authentication_flags |= AUTH_FLAG_CONNECTION_AUTHENTICATED; 3353 } 3354 3355 hci_pairing_complete(conn, hci_event_simple_pairing_complete_get_status(packet)); 3356 break; 3357 #endif 3358 3359 // HCI_EVENT_DISCONNECTION_COMPLETE 3360 // has been split, to first notify stack before shutting connection down 3361 // see end of function, too. 3362 case HCI_EVENT_DISCONNECTION_COMPLETE: 3363 if (packet[2]) break; // status != 0 3364 handle = little_endian_read_16(packet, 3); 3365 // drop outgoing ACL fragments if it is for closed connection and release buffer if tx not active 3366 if (hci_stack->acl_fragmentation_total_size > 0u) { 3367 if (handle == READ_ACL_CONNECTION_HANDLE(hci_stack->hci_packet_buffer)){ 3368 int release_buffer = hci_stack->acl_fragmentation_tx_active == 0u; 3369 log_info("drop fragmented ACL data for closed connection, release buffer %u", release_buffer); 3370 hci_stack->acl_fragmentation_total_size = 0; 3371 hci_stack->acl_fragmentation_pos = 0; 3372 if (release_buffer){ 3373 hci_release_packet_buffer(); 3374 } 3375 } 3376 } 3377 3378 conn = hci_connection_for_handle(handle); 3379 if (!conn) break; 3380 #ifdef ENABLE_CLASSIC 3381 // pairing failed if it was ongoing 3382 hci_pairing_complete(conn, ERROR_CODE_REMOTE_USER_TERMINATED_CONNECTION); 3383 #endif 3384 3385 // emit dedicatd bonding event 3386 if (conn->bonding_flags & BONDING_EMIT_COMPLETE_ON_DISCONNECT){ 3387 hci_emit_dedicated_bonding_result(conn->address, conn->bonding_status); 3388 } 3389 3390 // mark connection for shutdown, stop timers, reset state 3391 conn->state = RECEIVED_DISCONNECTION_COMPLETE; 3392 hci_connection_stop_timer(conn); 3393 hci_connection_init(conn); 3394 3395 #ifdef ENABLE_BLE 3396 #ifdef ENABLE_LE_PERIPHERAL 3397 // re-enable advertisements for le connections if active 3398 if (hci_is_le_connection(conn)){ 3399 hci_update_advertisements_enabled_for_current_roles(); 3400 } 3401 #endif 3402 #endif 3403 break; 3404 3405 case HCI_EVENT_HARDWARE_ERROR: 3406 log_error("Hardware Error: 0x%02x", packet[2]); 3407 if (hci_stack->hardware_error_callback){ 3408 (*hci_stack->hardware_error_callback)(packet[2]); 3409 } else { 3410 // if no special requests, just reboot stack 3411 hci_power_control_off(); 3412 hci_power_control_on(); 3413 } 3414 break; 3415 3416 #ifdef ENABLE_CLASSIC 3417 case HCI_EVENT_ROLE_CHANGE: 3418 if (packet[2]) break; // status != 0 3419 reverse_bd_addr(&packet[3], addr); 3420 addr_type = BD_ADDR_TYPE_ACL; 3421 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 3422 if (!conn) break; 3423 conn->role = packet[9]; 3424 break; 3425 #endif 3426 3427 case HCI_EVENT_TRANSPORT_PACKET_SENT: 3428 // release packet buffer only for asynchronous transport and if there are not further fragements 3429 if (hci_transport_synchronous()) { 3430 log_error("Synchronous HCI Transport shouldn't send HCI_EVENT_TRANSPORT_PACKET_SENT"); 3431 return; // instead of break: to avoid re-entering hci_run() 3432 } 3433 hci_stack->acl_fragmentation_tx_active = 0; 3434 if (hci_stack->acl_fragmentation_total_size) break; 3435 hci_release_packet_buffer(); 3436 3437 // L2CAP receives this event via the hci_emit_event below 3438 3439 #ifdef ENABLE_CLASSIC 3440 // For SCO, we do the can_send_now_check here 3441 hci_notify_if_sco_can_send_now(); 3442 #endif 3443 break; 3444 3445 #ifdef ENABLE_CLASSIC 3446 case HCI_EVENT_SCO_CAN_SEND_NOW: 3447 // For SCO, we do the can_send_now_check here 3448 hci_stack->sco_can_send_now = true; 3449 hci_notify_if_sco_can_send_now(); 3450 return; 3451 3452 // explode inquriy results for easier consumption 3453 case HCI_EVENT_INQUIRY_RESULT: 3454 case HCI_EVENT_INQUIRY_RESULT_WITH_RSSI: 3455 case HCI_EVENT_EXTENDED_INQUIRY_RESPONSE: 3456 gap_inquiry_explode(packet, size); 3457 break; 3458 #endif 3459 3460 #ifdef ENABLE_BLE 3461 case HCI_EVENT_LE_META: 3462 switch (packet[2]){ 3463 #ifdef ENABLE_LE_CENTRAL 3464 case HCI_SUBEVENT_LE_ADVERTISING_REPORT: 3465 if (!hci_stack->le_scanning_enabled) break; 3466 le_handle_advertisement_report(packet, size); 3467 break; 3468 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 3469 case HCI_SUBEVENT_LE_EXTENDED_ADVERTISING_REPORT: 3470 if (!hci_stack->le_scanning_enabled) break; 3471 le_handle_extended_advertisement_report(packet, size); 3472 break; 3473 #endif 3474 #endif 3475 case HCI_SUBEVENT_LE_CONNECTION_COMPLETE: 3476 event_handle_le_connection_complete(packet); 3477 break; 3478 3479 // log_info("LE buffer size: %u, count %u", little_endian_read_16(packet,6), packet[8]); 3480 case HCI_SUBEVENT_LE_CONNECTION_UPDATE_COMPLETE: 3481 handle = hci_subevent_le_connection_update_complete_get_connection_handle(packet); 3482 conn = hci_connection_for_handle(handle); 3483 if (!conn) break; 3484 conn->le_connection_interval = hci_subevent_le_connection_update_complete_get_conn_interval(packet); 3485 break; 3486 3487 case HCI_SUBEVENT_LE_REMOTE_CONNECTION_PARAMETER_REQUEST: 3488 // connection 3489 handle = hci_subevent_le_remote_connection_parameter_request_get_connection_handle(packet); 3490 conn = hci_connection_for_handle(handle); 3491 if (conn) { 3492 // read arguments 3493 uint16_t le_conn_interval_min = hci_subevent_le_remote_connection_parameter_request_get_interval_min(packet); 3494 uint16_t le_conn_interval_max = hci_subevent_le_remote_connection_parameter_request_get_interval_max(packet); 3495 uint16_t le_conn_latency = hci_subevent_le_remote_connection_parameter_request_get_latency(packet); 3496 uint16_t le_supervision_timeout = hci_subevent_le_remote_connection_parameter_request_get_timeout(packet); 3497 3498 // validate against current connection parameter range 3499 le_connection_parameter_range_t existing_range; 3500 gap_get_connection_parameter_range(&existing_range); 3501 int update_parameter = gap_connection_parameter_range_included(&existing_range, le_conn_interval_min, le_conn_interval_max, le_conn_latency, le_supervision_timeout); 3502 if (update_parameter){ 3503 conn->le_con_parameter_update_state = CON_PARAMETER_UPDATE_REPLY; 3504 conn->le_conn_interval_min = le_conn_interval_min; 3505 conn->le_conn_interval_max = le_conn_interval_max; 3506 conn->le_conn_latency = le_conn_latency; 3507 conn->le_supervision_timeout = le_supervision_timeout; 3508 } else { 3509 conn->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NEGATIVE_REPLY; 3510 } 3511 } 3512 break; 3513 #ifdef ENABLE_LE_LIMIT_ACL_FRAGMENT_BY_MAX_OCTETS 3514 case HCI_SUBEVENT_LE_DATA_LENGTH_CHANGE: 3515 handle = hci_subevent_le_data_length_change_get_connection_handle(packet); 3516 conn = hci_connection_for_handle(handle); 3517 if (conn) { 3518 conn->le_max_tx_octets = hci_subevent_le_data_length_change_get_max_tx_octets(packet); 3519 } 3520 break; 3521 #endif 3522 default: 3523 break; 3524 } 3525 break; 3526 #endif 3527 case HCI_EVENT_VENDOR_SPECIFIC: 3528 // Vendor specific commands often create vendor specific event instead of num completed packets 3529 // To avoid getting stuck as num_cmds_packets is zero, reset it to 1 for controllers with this behaviour 3530 switch (hci_stack->manufacturer){ 3531 case BLUETOOTH_COMPANY_ID_CAMBRIDGE_SILICON_RADIO: 3532 hci_stack->num_cmd_packets = 1; 3533 break; 3534 default: 3535 break; 3536 } 3537 break; 3538 default: 3539 break; 3540 } 3541 3542 handle_event_for_current_stack_state(packet, size); 3543 3544 // notify upper stack 3545 hci_emit_event(packet, size, 0); // don't dump, already happened in packet handler 3546 3547 // moved here to give upper stack a chance to close down everything with hci_connection_t intact 3548 if ((hci_event_packet_get_type(packet) == HCI_EVENT_DISCONNECTION_COMPLETE) && (packet[2] == 0)){ 3549 handle = little_endian_read_16(packet, 3); 3550 hci_connection_t * aConn = hci_connection_for_handle(handle); 3551 // discard connection if app did not trigger a reconnect in the event handler 3552 if (aConn && aConn->state == RECEIVED_DISCONNECTION_COMPLETE){ 3553 hci_shutdown_connection(aConn); 3554 } 3555 } 3556 3557 // execute main loop 3558 hci_run(); 3559 } 3560 3561 #ifdef ENABLE_CLASSIC 3562 3563 #ifdef ENABLE_SCO_OVER_HCI 3564 static void sco_tx_timeout_handler(btstack_timer_source_t * ts); 3565 static void sco_schedule_tx(hci_connection_t * conn); 3566 3567 static void sco_tx_timeout_handler(btstack_timer_source_t * ts){ 3568 log_debug("SCO TX Timeout"); 3569 hci_con_handle_t con_handle = (hci_con_handle_t) (uintptr_t) btstack_run_loop_get_timer_context(ts); 3570 hci_connection_t * conn = hci_connection_for_handle(con_handle); 3571 if (!conn) return; 3572 3573 // trigger send 3574 conn->sco_tx_ready = 1; 3575 // extra packet if CVSD but SCO buffer is too short 3576 if (((hci_stack->sco_voice_setting_active & 0x03) != 0x03) && (hci_stack->sco_data_packet_length < 123)){ 3577 conn->sco_tx_ready++; 3578 } 3579 hci_notify_if_sco_can_send_now(); 3580 } 3581 3582 3583 #define SCO_TX_AFTER_RX_MS (6) 3584 3585 static void sco_schedule_tx(hci_connection_t * conn){ 3586 3587 uint32_t now = btstack_run_loop_get_time_ms(); 3588 uint32_t sco_tx_ms = conn->sco_rx_ms + SCO_TX_AFTER_RX_MS; 3589 int time_delta_ms = sco_tx_ms - now; 3590 3591 btstack_timer_source_t * timer = (conn->sco_rx_count & 1) ? &conn->timeout : &conn->timeout_sco; 3592 3593 // log_error("SCO TX at %u in %u", (int) sco_tx_ms, time_delta_ms); 3594 btstack_run_loop_remove_timer(timer); 3595 btstack_run_loop_set_timer(timer, time_delta_ms); 3596 btstack_run_loop_set_timer_context(timer, (void *) (uintptr_t) conn->con_handle); 3597 btstack_run_loop_set_timer_handler(timer, &sco_tx_timeout_handler); 3598 btstack_run_loop_add_timer(timer); 3599 } 3600 #endif 3601 3602 static void sco_handler(uint8_t * packet, uint16_t size){ 3603 // lookup connection struct 3604 hci_con_handle_t con_handle = READ_SCO_CONNECTION_HANDLE(packet); 3605 hci_connection_t * conn = hci_connection_for_handle(con_handle); 3606 if (!conn) return; 3607 3608 #ifdef ENABLE_SCO_OVER_HCI 3609 // CSR 8811 prefixes 60 byte SCO packet in transparent mode with 20 zero bytes -> skip first 20 payload bytes 3610 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_CAMBRIDGE_SILICON_RADIO){ 3611 if ((size == 83) && ((hci_stack->sco_voice_setting_active & 0x03) == 0x03)){ 3612 packet[2] = 0x3c; 3613 memmove(&packet[3], &packet[23], 63); 3614 size = 63; 3615 } 3616 } 3617 3618 if (hci_have_usb_transport()){ 3619 // Nothing to do 3620 } else { 3621 // 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); 3622 if (hci_stack->synchronous_flow_control_enabled == 0){ 3623 uint32_t now = btstack_run_loop_get_time_ms(); 3624 3625 if (!conn->sco_rx_valid){ 3626 // ignore first 10 packets 3627 conn->sco_rx_count++; 3628 // log_debug("sco rx count %u", conn->sco_rx_count); 3629 if (conn->sco_rx_count == 10) { 3630 // use first timestamp as is and pretent it just started 3631 conn->sco_rx_ms = now; 3632 conn->sco_rx_valid = 1; 3633 conn->sco_rx_count = 0; 3634 sco_schedule_tx(conn); 3635 } 3636 } else { 3637 // track expected arrival timme 3638 conn->sco_rx_count++; 3639 conn->sco_rx_ms += 7; 3640 int delta = (int32_t) (now - conn->sco_rx_ms); 3641 if (delta > 0){ 3642 conn->sco_rx_ms++; 3643 } 3644 // log_debug("sco rx %u", conn->sco_rx_ms); 3645 sco_schedule_tx(conn); 3646 } 3647 } 3648 } 3649 #endif 3650 3651 // deliver to app 3652 if (hci_stack->sco_packet_handler) { 3653 hci_stack->sco_packet_handler(HCI_SCO_DATA_PACKET, 0, packet, size); 3654 } 3655 3656 #ifdef HAVE_SCO_TRANSPORT 3657 // We can send one packet for each received packet 3658 conn->sco_tx_ready++; 3659 hci_notify_if_sco_can_send_now(); 3660 #endif 3661 3662 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 3663 conn->num_packets_completed++; 3664 hci_stack->host_completed_packets = 1; 3665 hci_run(); 3666 #endif 3667 } 3668 #endif 3669 3670 static void packet_handler(uint8_t packet_type, uint8_t *packet, uint16_t size){ 3671 hci_dump_packet(packet_type, 1, packet, size); 3672 switch (packet_type) { 3673 case HCI_EVENT_PACKET: 3674 event_handler(packet, size); 3675 break; 3676 case HCI_ACL_DATA_PACKET: 3677 acl_handler(packet, size); 3678 break; 3679 #ifdef ENABLE_CLASSIC 3680 case HCI_SCO_DATA_PACKET: 3681 sco_handler(packet, size); 3682 break; 3683 #endif 3684 default: 3685 break; 3686 } 3687 } 3688 3689 /** 3690 * @brief Add event packet handler. 3691 */ 3692 void hci_add_event_handler(btstack_packet_callback_registration_t * callback_handler){ 3693 btstack_linked_list_add_tail(&hci_stack->event_handlers, (btstack_linked_item_t*) callback_handler); 3694 } 3695 3696 /** 3697 * @brief Remove event packet handler. 3698 */ 3699 void hci_remove_event_handler(btstack_packet_callback_registration_t * callback_handler){ 3700 btstack_linked_list_remove(&hci_stack->event_handlers, (btstack_linked_item_t*) callback_handler); 3701 } 3702 3703 /** Register HCI packet handlers */ 3704 void hci_register_acl_packet_handler(btstack_packet_handler_t handler){ 3705 hci_stack->acl_packet_handler = handler; 3706 } 3707 3708 #ifdef ENABLE_CLASSIC 3709 /** 3710 * @brief Registers a packet handler for SCO data. Used for HSP and HFP profiles. 3711 */ 3712 void hci_register_sco_packet_handler(btstack_packet_handler_t handler){ 3713 hci_stack->sco_packet_handler = handler; 3714 } 3715 #endif 3716 3717 static void hci_state_reset(void){ 3718 // no connections yet 3719 hci_stack->connections = NULL; 3720 3721 // keep discoverable/connectable as this has been requested by the client(s) 3722 // hci_stack->discoverable = 0; 3723 // hci_stack->connectable = 0; 3724 // hci_stack->bondable = 1; 3725 // hci_stack->own_addr_type = 0; 3726 3727 // buffer is free 3728 hci_stack->hci_packet_buffer_reserved = false; 3729 3730 // no pending cmds 3731 hci_stack->decline_reason = 0; 3732 3733 hci_stack->secure_connections_active = false; 3734 3735 #ifdef ENABLE_CLASSIC 3736 hci_stack->inquiry_lap = GAP_IAC_GENERAL_INQUIRY; 3737 hci_stack->page_timeout = 0x6000; // ca. 15 sec 3738 3739 hci_stack->gap_tasks_classic = 3740 GAP_TASK_SET_DEFAULT_LINK_POLICY | 3741 GAP_TASK_SET_CLASS_OF_DEVICE | 3742 GAP_TASK_SET_LOCAL_NAME | 3743 GAP_TASK_SET_EIR_DATA | 3744 GAP_TASK_WRITE_SCAN_ENABLE | 3745 GAP_TASK_WRITE_PAGE_TIMEOUT; 3746 #endif 3747 3748 #ifdef ENABLE_CLASSIC_PAIRING_OOB 3749 hci_stack->classic_read_local_oob_data = false; 3750 hci_stack->classic_oob_con_handle = HCI_CON_HANDLE_INVALID; 3751 #endif 3752 3753 // LE 3754 #ifdef ENABLE_BLE 3755 memset(hci_stack->le_random_address, 0, 6); 3756 hci_stack->le_random_address_set = 0; 3757 #endif 3758 #ifdef ENABLE_LE_CENTRAL 3759 hci_stack->le_scanning_active = false; 3760 hci_stack->le_scanning_param_update = true; 3761 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 3762 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 3763 hci_stack->le_whitelist_capacity = 0; 3764 #endif 3765 #ifdef ENABLE_LE_PERIPHERAL 3766 hci_stack->le_advertisements_state &= ~LE_ADVERTISEMENT_STATE_ACTIVE; 3767 if ((hci_stack->le_advertisements_state & LE_ADVERTISEMENT_STATE_PARAMS_SET) != 0){ 3768 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_PARAMS; 3769 } 3770 if (hci_stack->le_advertisements_data != NULL){ 3771 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_ADV_DATA; 3772 } 3773 #endif 3774 } 3775 3776 #ifdef ENABLE_CLASSIC 3777 /** 3778 * @brief Configure Bluetooth hardware control. Has to be called before power on. 3779 */ 3780 void hci_set_link_key_db(btstack_link_key_db_t const * link_key_db){ 3781 // store and open remote device db 3782 hci_stack->link_key_db = link_key_db; 3783 if (hci_stack->link_key_db) { 3784 hci_stack->link_key_db->open(); 3785 } 3786 } 3787 #endif 3788 3789 void hci_init(const hci_transport_t *transport, const void *config){ 3790 3791 #ifdef HAVE_MALLOC 3792 if (!hci_stack) { 3793 hci_stack = (hci_stack_t*) malloc(sizeof(hci_stack_t)); 3794 } 3795 #else 3796 hci_stack = &hci_stack_static; 3797 #endif 3798 memset(hci_stack, 0, sizeof(hci_stack_t)); 3799 3800 // reference to use transport layer implementation 3801 hci_stack->hci_transport = transport; 3802 3803 // reference to used config 3804 hci_stack->config = config; 3805 3806 // setup pointer for outgoing packet buffer 3807 hci_stack->hci_packet_buffer = &hci_stack->hci_packet_buffer_data[HCI_OUTGOING_PRE_BUFFER_SIZE]; 3808 3809 // max acl payload size defined in config.h 3810 hci_stack->acl_data_packet_length = HCI_ACL_PAYLOAD_SIZE; 3811 3812 // register packet handlers with transport 3813 transport->register_packet_handler(&packet_handler); 3814 3815 hci_stack->state = HCI_STATE_OFF; 3816 3817 // class of device 3818 hci_stack->class_of_device = 0x007a020c; // Smartphone 3819 3820 // bondable by default 3821 hci_stack->bondable = 1; 3822 3823 #ifdef ENABLE_CLASSIC 3824 // classic name 3825 hci_stack->local_name = default_classic_name; 3826 3827 // Master slave policy 3828 hci_stack->master_slave_policy = 1; 3829 3830 // Allow Role Switch 3831 hci_stack->allow_role_switch = 1; 3832 3833 // Default / minimum security level = 2 3834 hci_stack->gap_security_level = LEVEL_2; 3835 3836 // Default Security Mode 4 3837 hci_stack->gap_security_mode = GAP_SECURITY_MODE_4; 3838 3839 // Errata-11838 mandates 7 bytes for GAP Security Level 1-3 3840 hci_stack->gap_required_encyrption_key_size = 7; 3841 3842 // Link Supervision Timeout 3843 hci_stack->link_supervision_timeout = HCI_LINK_SUPERVISION_TIMEOUT_DEFAULT; 3844 3845 #endif 3846 3847 // Secure Simple Pairing default: enable, no I/O capabilities, general bonding, mitm not required, auto accept 3848 hci_stack->ssp_enable = 1; 3849 hci_stack->ssp_io_capability = SSP_IO_CAPABILITY_NO_INPUT_NO_OUTPUT; 3850 hci_stack->ssp_authentication_requirement = SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_GENERAL_BONDING; 3851 hci_stack->ssp_auto_accept = 1; 3852 3853 // Secure Connections: enable (requires support from Controller) 3854 hci_stack->secure_connections_enable = true; 3855 3856 // voice setting - signed 16 bit pcm data with CVSD over the air 3857 hci_stack->sco_voice_setting = 0x60; 3858 3859 #ifdef ENABLE_LE_CENTRAL 3860 // connection parameter to use for outgoing connections 3861 hci_stack->le_connection_scan_interval = 0x0060; // 60ms 3862 hci_stack->le_connection_scan_window = 0x0030; // 30ms 3863 hci_stack->le_connection_interval_min = 0x0008; // 10 ms 3864 hci_stack->le_connection_interval_max = 0x0018; // 30 ms 3865 hci_stack->le_connection_latency = 4; // 4 3866 hci_stack->le_supervision_timeout = 0x0048; // 720 ms 3867 hci_stack->le_minimum_ce_length = 2; // 1.25 ms 3868 hci_stack->le_maximum_ce_length = 0x0030; // 30 ms 3869 3870 // default LE Scanning 3871 hci_stack->le_scan_type = 0x1; // active 3872 hci_stack->le_scan_interval = 0x1e0; // 300 ms 3873 hci_stack->le_scan_window = 0x30; // 30 ms 3874 #endif 3875 3876 #ifdef ENABLE_LE_PERIPHERAL 3877 hci_stack->le_max_number_peripheral_connections = 1; // only single connection as peripheral 3878 #endif 3879 3880 // connection parameter range used to answer connection parameter update requests in l2cap 3881 hci_stack->le_connection_parameter_range.le_conn_interval_min = 6; 3882 hci_stack->le_connection_parameter_range.le_conn_interval_max = 3200; 3883 hci_stack->le_connection_parameter_range.le_conn_latency_min = 0; 3884 hci_stack->le_connection_parameter_range.le_conn_latency_max = 500; 3885 hci_stack->le_connection_parameter_range.le_supervision_timeout_min = 10; 3886 hci_stack->le_connection_parameter_range.le_supervision_timeout_max = 3200; 3887 3888 hci_state_reset(); 3889 } 3890 3891 void hci_deinit(void){ 3892 btstack_run_loop_remove_timer(&hci_stack->timeout); 3893 #ifdef HAVE_MALLOC 3894 if (hci_stack) { 3895 free(hci_stack); 3896 } 3897 #endif 3898 hci_stack = NULL; 3899 3900 #ifdef ENABLE_CLASSIC 3901 disable_l2cap_timeouts = 0; 3902 #endif 3903 } 3904 3905 /** 3906 * @brief Configure Bluetooth chipset driver. Has to be called before power on, or right after receiving the local version information 3907 */ 3908 void hci_set_chipset(const btstack_chipset_t *chipset_driver){ 3909 hci_stack->chipset = chipset_driver; 3910 3911 // reset chipset driver - init is also called on power_up 3912 if (hci_stack->chipset && hci_stack->chipset->init){ 3913 hci_stack->chipset->init(hci_stack->config); 3914 } 3915 } 3916 3917 /** 3918 * @brief Configure Bluetooth hardware control. Has to be called after hci_init() but before power on. 3919 */ 3920 void hci_set_control(const btstack_control_t *hardware_control){ 3921 // references to used control implementation 3922 hci_stack->control = hardware_control; 3923 // init with transport config 3924 hardware_control->init(hci_stack->config); 3925 } 3926 3927 static void hci_discard_connections(void){ 3928 btstack_linked_list_iterator_t lit; 3929 btstack_linked_list_iterator_init(&lit, &hci_stack->connections); 3930 while (btstack_linked_list_iterator_has_next(&lit)){ 3931 // cancel all l2cap connections by emitting dicsconnection complete before shutdown (free) connection 3932 hci_connection_t * connection = (hci_connection_t*) btstack_linked_list_iterator_next(&lit); 3933 hci_emit_disconnection_complete(connection->con_handle, 0x16); // terminated by local host 3934 hci_shutdown_connection(connection); 3935 } 3936 } 3937 3938 void hci_close(void){ 3939 3940 #ifdef ENABLE_CLASSIC 3941 // close remote device db 3942 if (hci_stack->link_key_db) { 3943 hci_stack->link_key_db->close(); 3944 } 3945 #endif 3946 3947 hci_discard_connections(); 3948 3949 hci_power_control(HCI_POWER_OFF); 3950 3951 #ifdef HAVE_MALLOC 3952 free(hci_stack); 3953 #endif 3954 hci_stack = NULL; 3955 } 3956 3957 #ifdef HAVE_SCO_TRANSPORT 3958 void hci_set_sco_transport(const btstack_sco_transport_t *sco_transport){ 3959 hci_stack->sco_transport = sco_transport; 3960 sco_transport->register_packet_handler(&packet_handler); 3961 } 3962 #endif 3963 3964 #ifdef ENABLE_CLASSIC 3965 void gap_set_required_encryption_key_size(uint8_t encryption_key_size){ 3966 // validate ranage and set 3967 if (encryption_key_size < 7) return; 3968 if (encryption_key_size > 16) return; 3969 hci_stack->gap_required_encyrption_key_size = encryption_key_size; 3970 } 3971 3972 uint8_t gap_set_security_mode(gap_security_mode_t security_mode){ 3973 if ((security_mode == GAP_SECURITY_MODE_4) || (security_mode == GAP_SECURITY_MODE_2)){ 3974 hci_stack->gap_security_mode = security_mode; 3975 return ERROR_CODE_SUCCESS; 3976 } else { 3977 return ERROR_CODE_UNSUPPORTED_FEATURE_OR_PARAMETER_VALUE; 3978 } 3979 } 3980 3981 gap_security_mode_t gap_get_security_mode(void){ 3982 return hci_stack->gap_security_mode; 3983 } 3984 3985 void gap_set_security_level(gap_security_level_t security_level){ 3986 hci_stack->gap_security_level = security_level; 3987 } 3988 3989 gap_security_level_t gap_get_security_level(void){ 3990 if (hci_stack->gap_secure_connections_only_mode){ 3991 return LEVEL_4; 3992 } 3993 return hci_stack->gap_security_level; 3994 } 3995 3996 void gap_set_minimal_service_security_level(gap_security_level_t security_level){ 3997 hci_stack->gap_minimal_service_security_level = security_level; 3998 } 3999 4000 void gap_set_secure_connections_only_mode(bool enable){ 4001 hci_stack->gap_secure_connections_only_mode = enable; 4002 } 4003 4004 bool gap_get_secure_connections_only_mode(void){ 4005 return hci_stack->gap_secure_connections_only_mode; 4006 } 4007 #endif 4008 4009 #ifdef ENABLE_CLASSIC 4010 void gap_set_class_of_device(uint32_t class_of_device){ 4011 hci_stack->class_of_device = class_of_device; 4012 hci_stack->gap_tasks_classic |= GAP_TASK_SET_CLASS_OF_DEVICE; 4013 hci_run(); 4014 } 4015 4016 void gap_set_default_link_policy_settings(uint16_t default_link_policy_settings){ 4017 hci_stack->default_link_policy_settings = default_link_policy_settings; 4018 hci_stack->gap_tasks_classic |= GAP_TASK_SET_DEFAULT_LINK_POLICY; 4019 hci_run(); 4020 } 4021 4022 void gap_set_allow_role_switch(bool allow_role_switch){ 4023 hci_stack->allow_role_switch = allow_role_switch ? 1 : 0; 4024 } 4025 4026 uint8_t hci_get_allow_role_switch(void){ 4027 return hci_stack->allow_role_switch; 4028 } 4029 4030 void gap_set_link_supervision_timeout(uint16_t link_supervision_timeout){ 4031 hci_stack->link_supervision_timeout = link_supervision_timeout; 4032 } 4033 4034 void gap_enable_link_watchdog(uint16_t timeout_ms){ 4035 hci_stack->automatic_flush_timeout = btstack_min(timeout_ms, 1280) * 8 / 5; // divide by 0.625 4036 } 4037 4038 uint16_t hci_automatic_flush_timeout(void){ 4039 return hci_stack->automatic_flush_timeout; 4040 } 4041 4042 void hci_disable_l2cap_timeout_check(void){ 4043 disable_l2cap_timeouts = 1; 4044 } 4045 #endif 4046 4047 #ifndef HAVE_HOST_CONTROLLER_API 4048 // Set Public BD ADDR - passed on to Bluetooth chipset if supported in bt_control_h 4049 void hci_set_bd_addr(bd_addr_t addr){ 4050 (void)memcpy(hci_stack->custom_bd_addr, addr, 6); 4051 hci_stack->custom_bd_addr_set = 1; 4052 } 4053 #endif 4054 4055 // State-Module-Driver overview 4056 // state module low-level 4057 // HCI_STATE_OFF off close 4058 // HCI_STATE_INITIALIZING, on open 4059 // HCI_STATE_WORKING, on open 4060 // HCI_STATE_HALTING, on open 4061 // HCI_STATE_SLEEPING, off/sleep close 4062 // HCI_STATE_FALLING_ASLEEP on open 4063 4064 static int hci_power_control_on(void){ 4065 4066 // power on 4067 int err = 0; 4068 if (hci_stack->control && hci_stack->control->on){ 4069 err = (*hci_stack->control->on)(); 4070 } 4071 if (err){ 4072 log_error( "POWER_ON failed"); 4073 hci_emit_hci_open_failed(); 4074 return err; 4075 } 4076 4077 // int chipset driver 4078 if (hci_stack->chipset && hci_stack->chipset->init){ 4079 hci_stack->chipset->init(hci_stack->config); 4080 } 4081 4082 // init transport 4083 if (hci_stack->hci_transport->init){ 4084 hci_stack->hci_transport->init(hci_stack->config); 4085 } 4086 4087 // open transport 4088 err = hci_stack->hci_transport->open(); 4089 if (err){ 4090 log_error( "HCI_INIT failed, turning Bluetooth off again"); 4091 if (hci_stack->control && hci_stack->control->off){ 4092 (*hci_stack->control->off)(); 4093 } 4094 hci_emit_hci_open_failed(); 4095 return err; 4096 } 4097 return 0; 4098 } 4099 4100 static void hci_power_control_off(void){ 4101 4102 log_info("hci_power_control_off"); 4103 4104 // close low-level device 4105 hci_stack->hci_transport->close(); 4106 4107 log_info("hci_power_control_off - hci_transport closed"); 4108 4109 // power off 4110 if (hci_stack->control && hci_stack->control->off){ 4111 (*hci_stack->control->off)(); 4112 } 4113 4114 log_info("hci_power_control_off - control closed"); 4115 4116 hci_stack->state = HCI_STATE_OFF; 4117 } 4118 4119 static void hci_power_control_sleep(void){ 4120 4121 log_info("hci_power_control_sleep"); 4122 4123 #if 0 4124 // don't close serial port during sleep 4125 4126 // close low-level device 4127 hci_stack->hci_transport->close(hci_stack->config); 4128 #endif 4129 4130 // sleep mode 4131 if (hci_stack->control && hci_stack->control->sleep){ 4132 (*hci_stack->control->sleep)(); 4133 } 4134 4135 hci_stack->state = HCI_STATE_SLEEPING; 4136 } 4137 4138 static int hci_power_control_wake(void){ 4139 4140 log_info("hci_power_control_wake"); 4141 4142 // wake on 4143 if (hci_stack->control && hci_stack->control->wake){ 4144 (*hci_stack->control->wake)(); 4145 } 4146 4147 #if 0 4148 // open low-level device 4149 int err = hci_stack->hci_transport->open(hci_stack->config); 4150 if (err){ 4151 log_error( "HCI_INIT failed, turning Bluetooth off again"); 4152 if (hci_stack->control && hci_stack->control->off){ 4153 (*hci_stack->control->off)(); 4154 } 4155 hci_emit_hci_open_failed(); 4156 return err; 4157 } 4158 #endif 4159 4160 return 0; 4161 } 4162 4163 static void hci_power_enter_initializing_state(void){ 4164 // set up state machine 4165 hci_stack->num_cmd_packets = 1; // assume that one cmd can be sent 4166 hci_stack->hci_packet_buffer_reserved = false; 4167 hci_stack->state = HCI_STATE_INITIALIZING; 4168 hci_stack->substate = HCI_INIT_SEND_RESET; 4169 } 4170 4171 static void hci_power_enter_halting_state(void){ 4172 #ifdef ENABLE_BLE 4173 hci_whitelist_free(); 4174 #endif 4175 // see hci_run 4176 hci_stack->state = HCI_STATE_HALTING; 4177 hci_stack->substate = HCI_HALTING_CLASSIC_STOP; 4178 // setup watchdog timer for disconnect - only triggers if Controller does not respond anymore 4179 btstack_run_loop_set_timer(&hci_stack->timeout, 1000); 4180 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_halting_timeout_handler); 4181 btstack_run_loop_add_timer(&hci_stack->timeout); 4182 } 4183 4184 // returns error 4185 static int hci_power_control_state_off(HCI_POWER_MODE power_mode){ 4186 int err; 4187 switch (power_mode){ 4188 case HCI_POWER_ON: 4189 err = hci_power_control_on(); 4190 if (err != 0) { 4191 log_error("hci_power_control_on() error %d", err); 4192 return err; 4193 } 4194 hci_power_enter_initializing_state(); 4195 break; 4196 case HCI_POWER_OFF: 4197 // do nothing 4198 break; 4199 case HCI_POWER_SLEEP: 4200 // do nothing (with SLEEP == OFF) 4201 break; 4202 default: 4203 btstack_assert(false); 4204 break; 4205 } 4206 return ERROR_CODE_SUCCESS; 4207 } 4208 4209 static int hci_power_control_state_initializing(HCI_POWER_MODE power_mode){ 4210 switch (power_mode){ 4211 case HCI_POWER_ON: 4212 // do nothing 4213 break; 4214 case HCI_POWER_OFF: 4215 // no connections yet, just turn it off 4216 hci_power_control_off(); 4217 break; 4218 case HCI_POWER_SLEEP: 4219 // no connections yet, just turn it off 4220 hci_power_control_sleep(); 4221 break; 4222 default: 4223 btstack_assert(false); 4224 break; 4225 } 4226 return ERROR_CODE_SUCCESS; 4227 } 4228 4229 static int hci_power_control_state_working(HCI_POWER_MODE power_mode) { 4230 switch (power_mode){ 4231 case HCI_POWER_ON: 4232 // do nothing 4233 break; 4234 case HCI_POWER_OFF: 4235 hci_power_enter_halting_state(); 4236 break; 4237 case HCI_POWER_SLEEP: 4238 // see hci_run 4239 hci_stack->state = HCI_STATE_FALLING_ASLEEP; 4240 hci_stack->substate = HCI_FALLING_ASLEEP_DISCONNECT; 4241 break; 4242 default: 4243 btstack_assert(false); 4244 break; 4245 } 4246 return ERROR_CODE_SUCCESS; 4247 } 4248 4249 static int hci_power_control_state_halting(HCI_POWER_MODE power_mode) { 4250 switch (power_mode){ 4251 case HCI_POWER_ON: 4252 hci_power_enter_initializing_state(); 4253 break; 4254 case HCI_POWER_OFF: 4255 // do nothing 4256 break; 4257 case HCI_POWER_SLEEP: 4258 // see hci_run 4259 hci_stack->state = HCI_STATE_FALLING_ASLEEP; 4260 hci_stack->substate = HCI_FALLING_ASLEEP_DISCONNECT; 4261 break; 4262 default: 4263 btstack_assert(false); 4264 break; 4265 } 4266 return ERROR_CODE_SUCCESS; 4267 } 4268 4269 static int hci_power_control_state_falling_asleep(HCI_POWER_MODE power_mode) { 4270 switch (power_mode){ 4271 case HCI_POWER_ON: 4272 hci_power_enter_initializing_state(); 4273 break; 4274 case HCI_POWER_OFF: 4275 hci_power_enter_halting_state(); 4276 break; 4277 case HCI_POWER_SLEEP: 4278 // do nothing 4279 break; 4280 default: 4281 btstack_assert(false); 4282 break; 4283 } 4284 return ERROR_CODE_SUCCESS; 4285 } 4286 4287 static int hci_power_control_state_sleeping(HCI_POWER_MODE power_mode) { 4288 int err; 4289 switch (power_mode){ 4290 case HCI_POWER_ON: 4291 err = hci_power_control_wake(); 4292 if (err) return err; 4293 hci_power_enter_initializing_state(); 4294 break; 4295 case HCI_POWER_OFF: 4296 hci_power_enter_halting_state(); 4297 break; 4298 case HCI_POWER_SLEEP: 4299 // do nothing 4300 break; 4301 default: 4302 btstack_assert(false); 4303 break; 4304 } 4305 return ERROR_CODE_SUCCESS; 4306 } 4307 4308 int hci_power_control(HCI_POWER_MODE power_mode){ 4309 log_info("hci_power_control: %d, current mode %u", power_mode, hci_stack->state); 4310 int err = 0; 4311 switch (hci_stack->state){ 4312 case HCI_STATE_OFF: 4313 err = hci_power_control_state_off(power_mode); 4314 break; 4315 case HCI_STATE_INITIALIZING: 4316 err = hci_power_control_state_initializing(power_mode); 4317 break; 4318 case HCI_STATE_WORKING: 4319 err = hci_power_control_state_working(power_mode); 4320 break; 4321 case HCI_STATE_HALTING: 4322 err = hci_power_control_state_halting(power_mode); 4323 break; 4324 case HCI_STATE_FALLING_ASLEEP: 4325 err = hci_power_control_state_falling_asleep(power_mode); 4326 break; 4327 case HCI_STATE_SLEEPING: 4328 err = hci_power_control_state_sleeping(power_mode); 4329 break; 4330 default: 4331 btstack_assert(false); 4332 break; 4333 } 4334 if (err != 0){ 4335 return err; 4336 } 4337 4338 // create internal event 4339 hci_emit_state(); 4340 4341 // trigger next/first action 4342 hci_run(); 4343 4344 return 0; 4345 } 4346 4347 4348 static void hci_halting_run(void) { 4349 4350 log_info("HCI_STATE_HALTING, substate %x\n", hci_stack->substate); 4351 4352 hci_connection_t *connection; 4353 #ifdef ENABLE_BLE 4354 #ifdef ENABLE_LE_PERIPHERAL 4355 bool stop_advertismenets; 4356 #endif 4357 #endif 4358 4359 switch (hci_stack->substate) { 4360 case HCI_HALTING_CLASSIC_STOP: 4361 #ifdef ENABLE_CLASSIC 4362 if (!hci_can_send_command_packet_now()) return; 4363 4364 if (hci_stack->connectable || hci_stack->discoverable){ 4365 hci_stack->substate = HCI_HALTING_LE_ADV_STOP; 4366 hci_send_cmd(&hci_write_scan_enable, 0); 4367 return; 4368 } 4369 #endif 4370 /* fall through */ 4371 4372 case HCI_HALTING_LE_ADV_STOP: 4373 hci_stack->substate = HCI_HALTING_LE_ADV_STOP; 4374 4375 #ifdef ENABLE_BLE 4376 #ifdef ENABLE_LE_PERIPHERAL 4377 if (!hci_can_send_command_packet_now()) return; 4378 4379 stop_advertismenets = (hci_stack->le_advertisements_state & LE_ADVERTISEMENT_STATE_ACTIVE) != 0; 4380 4381 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 4382 if (hci_extended_advertising_supported()){ 4383 btstack_linked_list_iterator_t it; 4384 btstack_linked_list_iterator_init(&it, &hci_stack->le_advertising_sets); 4385 // stop all periodic advertisements and check if an extended set is active 4386 while (btstack_linked_list_iterator_has_next(&it)){ 4387 le_advertising_set_t * advertising_set = (le_advertising_set_t*) btstack_linked_list_iterator_next(&it); 4388 if ((advertising_set->state & LE_ADVERTISEMENT_STATE_PERIODIC_ACTIVE) != 0) { 4389 advertising_set->state &= ~LE_ADVERTISEMENT_STATE_PERIODIC_ACTIVE; 4390 hci_send_cmd(&hci_le_set_periodic_advertising_enable, 0, advertising_set->advertising_handle); 4391 return; 4392 } 4393 if ((advertising_set->state & LE_ADVERTISEMENT_STATE_ACTIVE) != 0) { 4394 stop_advertismenets = true; 4395 advertising_set->state &= ~LE_ADVERTISEMENT_STATE_ACTIVE; 4396 } 4397 } 4398 if (stop_advertismenets){ 4399 hci_stack->le_advertisements_state &= ~LE_ADVERTISEMENT_STATE_ACTIVE; 4400 hci_send_cmd(&hci_le_set_extended_advertising_enable, 0, 0, NULL, NULL, NULL); 4401 return; 4402 } 4403 } 4404 else 4405 #else 4406 { 4407 if (stop_advertismenets) { 4408 hci_stack->le_advertisements_state &= ~LE_ADVERTISEMENT_STATE_ACTIVE; 4409 hci_send_cmd(&hci_le_set_advertise_enable, 0); 4410 return; 4411 } 4412 } 4413 #endif /* ENABLE_LE_EXTENDED_ADVERTISING*/ 4414 #endif /* ENABLE_LE_PERIPHERAL */ 4415 #endif /* ENABLE_BLE */ 4416 4417 /* fall through */ 4418 4419 case HCI_HALTING_LE_SCAN_STOP: 4420 hci_stack->substate = HCI_HALTING_LE_SCAN_STOP; 4421 if (!hci_can_send_command_packet_now()) return; 4422 4423 #ifdef ENABLE_BLE 4424 #ifdef ENABLE_LE_CENTRAL 4425 if (hci_stack->le_scanning_active){ 4426 hci_le_scan_stop(); 4427 hci_stack->substate = HCI_HALTING_DISCONNECT_ALL; 4428 return; 4429 } 4430 #endif 4431 #endif 4432 4433 /* fall through */ 4434 4435 case HCI_HALTING_DISCONNECT_ALL: 4436 hci_stack->substate = HCI_HALTING_DISCONNECT_ALL; 4437 if (!hci_can_send_command_packet_now()) return; 4438 4439 // close all open connections 4440 connection = (hci_connection_t *) hci_stack->connections; 4441 if (connection) { 4442 hci_con_handle_t con_handle = (uint16_t) connection->con_handle; 4443 4444 // check state 4445 if (connection->state == SENT_DISCONNECT) return; 4446 connection->state = SENT_DISCONNECT; 4447 4448 log_info("HCI_STATE_HALTING, connection %p, handle %u", connection, con_handle); 4449 4450 // finally, send the disconnect command 4451 hci_send_cmd(&hci_disconnect, con_handle, ERROR_CODE_REMOTE_USER_TERMINATED_CONNECTION); 4452 return; 4453 } 4454 4455 btstack_run_loop_remove_timer(&hci_stack->timeout); 4456 4457 hci_stack->substate = HCI_HALTING_READY_FOR_CLOSE; 4458 4459 // no connections left, wait a bit to assert that btstack_cyrpto isn't waiting for an HCI event 4460 log_info("HCI_STATE_HALTING: wait 50 ms"); 4461 hci_stack->substate = HCI_HALTING_W4_CLOSE_TIMER; 4462 btstack_run_loop_set_timer(&hci_stack->timeout, 50); 4463 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_halting_timeout_handler); 4464 btstack_run_loop_add_timer(&hci_stack->timeout); 4465 break; 4466 4467 case HCI_HALTING_CLOSE: 4468 // close left over connections (that had not been properly closed before) 4469 hci_discard_connections(); 4470 4471 log_info("HCI_STATE_HALTING, calling off"); 4472 4473 // switch mode 4474 hci_power_control_off(); 4475 4476 log_info("HCI_STATE_HALTING, emitting state"); 4477 hci_emit_state(); 4478 log_info("HCI_STATE_HALTING, done"); 4479 break; 4480 4481 case HCI_HALTING_W4_CLOSE_TIMER: 4482 // keep waiting 4483 4484 break; 4485 default: 4486 break; 4487 } 4488 }; 4489 4490 static void hci_falling_asleep_run(void){ 4491 hci_connection_t * connection; 4492 switch(hci_stack->substate) { 4493 case HCI_FALLING_ASLEEP_DISCONNECT: 4494 log_info("HCI_STATE_FALLING_ASLEEP"); 4495 // close all open connections 4496 connection = (hci_connection_t *) hci_stack->connections; 4497 if (connection){ 4498 4499 // send disconnect 4500 if (!hci_can_send_command_packet_now()) return; 4501 4502 log_info("HCI_STATE_FALLING_ASLEEP, connection %p, handle %u", connection, (uint16_t)connection->con_handle); 4503 hci_send_cmd(&hci_disconnect, connection->con_handle, ERROR_CODE_REMOTE_USER_TERMINATED_CONNECTION); 4504 4505 // send disconnected event right away - causes higher layer connections to get closed, too. 4506 hci_shutdown_connection(connection); 4507 return; 4508 } 4509 4510 if (hci_classic_supported()){ 4511 // disable page and inquiry scan 4512 if (!hci_can_send_command_packet_now()) return; 4513 4514 log_info("HCI_STATE_HALTING, disabling inq scans"); 4515 hci_send_cmd(&hci_write_scan_enable, hci_stack->connectable << 1); // drop inquiry scan but keep page scan 4516 4517 // continue in next sub state 4518 hci_stack->substate = HCI_FALLING_ASLEEP_W4_WRITE_SCAN_ENABLE; 4519 break; 4520 } 4521 4522 /* fall through */ 4523 4524 case HCI_FALLING_ASLEEP_COMPLETE: 4525 log_info("HCI_STATE_HALTING, calling sleep"); 4526 // switch mode 4527 hci_power_control_sleep(); // changes hci_stack->state to SLEEP 4528 hci_emit_state(); 4529 break; 4530 4531 default: 4532 break; 4533 } 4534 } 4535 4536 #ifdef ENABLE_CLASSIC 4537 4538 static void hci_update_scan_enable(void){ 4539 // 2 = page scan, 1 = inq scan 4540 hci_stack->new_scan_enable_value = (hci_stack->connectable << 1) | hci_stack->discoverable; 4541 hci_stack->gap_tasks_classic |= GAP_TASK_WRITE_SCAN_ENABLE; 4542 hci_run(); 4543 } 4544 4545 void gap_discoverable_control(uint8_t enable){ 4546 if (enable) enable = 1; // normalize argument 4547 4548 if (hci_stack->discoverable == enable){ 4549 hci_emit_discoverable_enabled(hci_stack->discoverable); 4550 return; 4551 } 4552 4553 hci_stack->discoverable = enable; 4554 hci_update_scan_enable(); 4555 } 4556 4557 void gap_connectable_control(uint8_t enable){ 4558 if (enable) enable = 1; // normalize argument 4559 4560 // don't emit event 4561 if (hci_stack->connectable == enable) return; 4562 4563 hci_stack->connectable = enable; 4564 hci_update_scan_enable(); 4565 } 4566 #endif 4567 4568 void gap_local_bd_addr(bd_addr_t address_buffer){ 4569 (void)memcpy(address_buffer, hci_stack->local_bd_addr, 6); 4570 } 4571 4572 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 4573 static void hci_host_num_completed_packets(void){ 4574 4575 // create packet manually as arrays are not supported and num_commands should not get reduced 4576 hci_reserve_packet_buffer(); 4577 uint8_t * packet = hci_get_outgoing_packet_buffer(); 4578 4579 uint16_t size = 0; 4580 uint16_t num_handles = 0; 4581 packet[size++] = 0x35; 4582 packet[size++] = 0x0c; 4583 size++; // skip param len 4584 size++; // skip num handles 4585 4586 // add { handle, packets } entries 4587 btstack_linked_item_t * it; 4588 for (it = (btstack_linked_item_t *) hci_stack->connections; it ; it = it->next){ 4589 hci_connection_t * connection = (hci_connection_t *) it; 4590 if (connection->num_packets_completed){ 4591 little_endian_store_16(packet, size, connection->con_handle); 4592 size += 2; 4593 little_endian_store_16(packet, size, connection->num_packets_completed); 4594 size += 2; 4595 // 4596 num_handles++; 4597 connection->num_packets_completed = 0; 4598 } 4599 } 4600 4601 packet[2] = size - 3; 4602 packet[3] = num_handles; 4603 4604 hci_stack->host_completed_packets = 0; 4605 4606 hci_dump_packet(HCI_COMMAND_DATA_PACKET, 0, packet, size); 4607 hci_stack->hci_transport->send_packet(HCI_COMMAND_DATA_PACKET, packet, size); 4608 4609 // release packet buffer for synchronous transport implementations 4610 if (hci_transport_synchronous()){ 4611 hci_release_packet_buffer(); 4612 hci_emit_transport_packet_sent(); 4613 } 4614 } 4615 #endif 4616 4617 static void hci_halting_timeout_handler(btstack_timer_source_t * ds){ 4618 UNUSED(ds); 4619 hci_stack->substate = HCI_HALTING_CLOSE; 4620 // allow packet handlers to defer final shutdown 4621 hci_emit_state(); 4622 hci_run(); 4623 } 4624 4625 static bool hci_run_acl_fragments(void){ 4626 if (hci_stack->acl_fragmentation_total_size > 0u) { 4627 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(hci_stack->hci_packet_buffer); 4628 hci_connection_t *connection = hci_connection_for_handle(con_handle); 4629 if (connection) { 4630 if (hci_can_send_prepared_acl_packet_now(con_handle)){ 4631 hci_send_acl_packet_fragments(connection); 4632 return true; 4633 } 4634 } else { 4635 // connection gone -> discard further fragments 4636 log_info("hci_run: fragmented ACL packet no connection -> discard fragment"); 4637 hci_stack->acl_fragmentation_total_size = 0; 4638 hci_stack->acl_fragmentation_pos = 0; 4639 } 4640 } 4641 return false; 4642 } 4643 4644 #ifdef ENABLE_CLASSIC 4645 4646 #ifdef ENABLE_HCI_SERIALIZED_CONTROLLER_OPERATIONS 4647 static bool hci_classic_operation_active(void) { 4648 if (hci_stack->inquiry_state >= GAP_INQUIRY_STATE_W4_ACTIVE){ 4649 return true; 4650 } 4651 if (hci_stack->remote_name_state == GAP_REMOTE_NAME_STATE_W4_COMPLETE){ 4652 return true; 4653 } 4654 btstack_linked_item_t * it; 4655 for (it = (btstack_linked_item_t *) hci_stack->connections; it != NULL; it = it->next) { 4656 hci_connection_t *connection = (hci_connection_t *) it; 4657 switch (connection->state) { 4658 case SENT_CREATE_CONNECTION: 4659 case SENT_CANCEL_CONNECTION: 4660 case SENT_DISCONNECT: 4661 return true; 4662 default: 4663 break; 4664 } 4665 } 4666 return false; 4667 } 4668 #endif 4669 4670 static bool hci_run_general_gap_classic(void){ 4671 4672 // assert stack is working and classic is active 4673 if (hci_classic_supported() == false) return false; 4674 if (hci_stack->state != HCI_STATE_WORKING) return false; 4675 4676 // decline incoming connections 4677 if (hci_stack->decline_reason){ 4678 uint8_t reason = hci_stack->decline_reason; 4679 hci_stack->decline_reason = 0; 4680 hci_send_cmd(&hci_reject_connection_request, hci_stack->decline_addr, reason); 4681 return true; 4682 } 4683 4684 if (hci_stack->gap_tasks_classic != 0){ 4685 hci_run_gap_tasks_classic(); 4686 return true; 4687 } 4688 4689 // start/stop inquiry 4690 if ((hci_stack->inquiry_state >= GAP_INQUIRY_DURATION_MIN) && (hci_stack->inquiry_state <= GAP_INQUIRY_DURATION_MAX)){ 4691 #ifdef ENABLE_HCI_SERIALIZED_CONTROLLER_OPERATIONS 4692 if (hci_classic_operation_active() == false) 4693 #endif 4694 { 4695 uint8_t duration = hci_stack->inquiry_state; 4696 hci_stack->inquiry_state = GAP_INQUIRY_STATE_W4_ACTIVE; 4697 hci_send_cmd(&hci_inquiry, hci_stack->inquiry_lap, duration, 0); 4698 return true; 4699 } 4700 } 4701 if (hci_stack->inquiry_state == GAP_INQUIRY_STATE_W2_CANCEL){ 4702 hci_stack->inquiry_state = GAP_INQUIRY_STATE_W4_CANCELLED; 4703 hci_send_cmd(&hci_inquiry_cancel); 4704 return true; 4705 } 4706 // remote name request 4707 if (hci_stack->remote_name_state == GAP_REMOTE_NAME_STATE_W2_SEND){ 4708 #ifdef ENABLE_HCI_SERIALIZED_CONTROLLER_OPERATIONS 4709 if (hci_classic_operation_active() == false) 4710 #endif 4711 { 4712 hci_stack->remote_name_state = GAP_REMOTE_NAME_STATE_W4_COMPLETE; 4713 hci_send_cmd(&hci_remote_name_request, hci_stack->remote_name_addr, 4714 hci_stack->remote_name_page_scan_repetition_mode, 0, hci_stack->remote_name_clock_offset); 4715 return true; 4716 } 4717 } 4718 #ifdef ENABLE_CLASSIC_PAIRING_OOB 4719 // Local OOB data 4720 if (hci_stack->classic_read_local_oob_data){ 4721 hci_stack->classic_read_local_oob_data = false; 4722 if (hci_command_supported(SUPPORTED_HCI_COMMAND_READ_LOCAL_OOB_EXTENDED_DATA_COMMAND)){ 4723 hci_send_cmd(&hci_read_local_extended_oob_data); 4724 } else { 4725 hci_send_cmd(&hci_read_local_oob_data); 4726 } 4727 } 4728 #endif 4729 // pairing 4730 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE){ 4731 uint8_t state = hci_stack->gap_pairing_state; 4732 uint8_t pin_code[16]; 4733 switch (state){ 4734 case GAP_PAIRING_STATE_SEND_PIN: 4735 hci_stack->gap_pairing_state = GAP_PAIRING_STATE_IDLE; 4736 memset(pin_code, 0, 16); 4737 memcpy(pin_code, hci_stack->gap_pairing_input.gap_pairing_pin, hci_stack->gap_pairing_pin_len); 4738 hci_send_cmd(&hci_pin_code_request_reply, hci_stack->gap_pairing_addr, hci_stack->gap_pairing_pin_len, pin_code); 4739 break; 4740 case GAP_PAIRING_STATE_SEND_PIN_NEGATIVE: 4741 hci_stack->gap_pairing_state = GAP_PAIRING_STATE_WAIT_FOR_COMMAND_COMPLETE; 4742 hci_send_cmd(&hci_pin_code_request_negative_reply, hci_stack->gap_pairing_addr); 4743 break; 4744 case GAP_PAIRING_STATE_SEND_PASSKEY: 4745 hci_stack->gap_pairing_state = GAP_PAIRING_STATE_IDLE; 4746 hci_send_cmd(&hci_user_passkey_request_reply, hci_stack->gap_pairing_addr, hci_stack->gap_pairing_input.gap_pairing_passkey); 4747 break; 4748 case GAP_PAIRING_STATE_SEND_PASSKEY_NEGATIVE: 4749 hci_stack->gap_pairing_state = GAP_PAIRING_STATE_WAIT_FOR_COMMAND_COMPLETE; 4750 hci_send_cmd(&hci_user_passkey_request_negative_reply, hci_stack->gap_pairing_addr); 4751 break; 4752 case GAP_PAIRING_STATE_SEND_CONFIRMATION: 4753 hci_stack->gap_pairing_state = GAP_PAIRING_STATE_IDLE; 4754 hci_send_cmd(&hci_user_confirmation_request_reply, hci_stack->gap_pairing_addr); 4755 break; 4756 case GAP_PAIRING_STATE_SEND_CONFIRMATION_NEGATIVE: 4757 hci_stack->gap_pairing_state = GAP_PAIRING_STATE_WAIT_FOR_COMMAND_COMPLETE; 4758 hci_send_cmd(&hci_user_confirmation_request_negative_reply, hci_stack->gap_pairing_addr); 4759 break; 4760 default: 4761 break; 4762 } 4763 return true; 4764 } 4765 return false; 4766 } 4767 #endif 4768 4769 #ifdef ENABLE_BLE 4770 4771 #ifdef ENABLE_LE_CENTRAL 4772 static void hci_le_scan_stop(void){ 4773 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 4774 if (hci_extended_advertising_supported()) { 4775 hci_send_cmd(&hci_le_set_extended_scan_enable, 0, 0, 0, 0); 4776 } else 4777 #endif 4778 { 4779 hci_send_cmd(&hci_le_set_scan_enable, 0, 0); 4780 } 4781 } 4782 #endif 4783 4784 #ifdef ENABLE_LE_PERIPHERAL 4785 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 4786 uint8_t hci_le_extended_advertising_operation_for_chunk(uint16_t pos, uint16_t len){ 4787 uint8_t operation = 0; 4788 if (pos == 0){ 4789 // first fragment or complete data 4790 operation |= 1; 4791 } 4792 if (pos + LE_EXTENDED_ADVERTISING_MAX_CHUNK_LEN >= len){ 4793 // last fragment or complete data 4794 operation |= 2; 4795 } 4796 return operation; 4797 } 4798 #endif 4799 #endif 4800 4801 static bool hci_run_general_gap_le(void){ 4802 4803 // Phase 1: collect what to stop 4804 4805 bool scanning_stop = false; 4806 bool connecting_stop = false; 4807 bool advertising_stop = false; 4808 4809 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 4810 le_advertising_set_t * advertising_stop_set = NULL; 4811 bool periodic_stop = false; 4812 #endif 4813 4814 #ifndef ENABLE_LE_CENTRAL 4815 UNUSED(scanning_stop); 4816 UNUSED(connecting_stop); 4817 #endif 4818 #ifndef ENABLE_LE_PERIPHERAL 4819 UNUSED(advertising_stop); 4820 #endif 4821 4822 // check if own address changes 4823 bool random_address_change = (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_ADDRESS) != 0; 4824 4825 // check if whitelist needs modification 4826 bool whitelist_modification_pending = false; 4827 btstack_linked_list_iterator_t lit; 4828 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 4829 while (btstack_linked_list_iterator_has_next(&lit)){ 4830 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&lit); 4831 if (entry->state & (LE_WHITELIST_REMOVE_FROM_CONTROLLER | LE_WHITELIST_ADD_TO_CONTROLLER)){ 4832 whitelist_modification_pending = true; 4833 break; 4834 } 4835 } 4836 // check if resolving list needs modification 4837 bool resolving_list_modification_pending = false; 4838 #ifdef ENABLE_LE_PRIVACY_ADDRESS_RESOLUTION 4839 4840 bool resolving_list_supported = hci_command_supported(SUPPORTED_HCI_COMMAND_LE_SET_ADDRESS_RESOLUTION_ENABLE); 4841 if (resolving_list_supported && hci_stack->le_resolving_list_state != LE_RESOLVING_LIST_DONE){ 4842 resolving_list_modification_pending = true; 4843 } 4844 #endif 4845 4846 #ifdef ENABLE_LE_CENTRAL 4847 // scanning control 4848 if (hci_stack->le_scanning_active) { 4849 // stop if: 4850 // - parameter change required 4851 // - it's disabled 4852 // - whitelist change required but used for scanning 4853 // - resolving list modified 4854 // - own address changes 4855 bool scanning_uses_whitelist = (hci_stack->le_scan_filter_policy & 1) == 1; 4856 if ((hci_stack->le_scanning_param_update) || 4857 !hci_stack->le_scanning_enabled || 4858 (scanning_uses_whitelist && whitelist_modification_pending) || 4859 resolving_list_modification_pending || 4860 random_address_change){ 4861 4862 scanning_stop = true; 4863 } 4864 } 4865 #endif 4866 4867 #ifdef ENABLE_LE_CENTRAL 4868 // connecting control 4869 bool connecting_with_whitelist; 4870 switch (hci_stack->le_connecting_state){ 4871 case LE_CONNECTING_DIRECT: 4872 case LE_CONNECTING_WHITELIST: 4873 // stop connecting if: 4874 // - connecting uses white and whitelist modification pending 4875 // - if it got disabled 4876 // - resolving list modified 4877 // - own address changes 4878 connecting_with_whitelist = hci_stack->le_connecting_state == LE_CONNECTING_WHITELIST; 4879 if ((connecting_with_whitelist && whitelist_modification_pending) || 4880 (hci_stack->le_connecting_request == LE_CONNECTING_IDLE) || 4881 resolving_list_modification_pending || 4882 random_address_change) { 4883 4884 connecting_stop = true; 4885 } 4886 break; 4887 default: 4888 break; 4889 } 4890 #endif 4891 4892 #ifdef ENABLE_LE_PERIPHERAL 4893 // le advertisement control 4894 if ((hci_stack->le_advertisements_state & LE_ADVERTISEMENT_STATE_ACTIVE) != 0){ 4895 // stop if: 4896 // - parameter change required 4897 // - random address used in advertising and changes 4898 // - it's disabled 4899 // - whitelist change required but used for advertisement filter policy 4900 // - resolving list modified 4901 // - own address changes 4902 bool advertising_uses_whitelist = hci_stack->le_advertisements_filter_policy != 0; 4903 bool advertising_uses_random_address = hci_stack->le_own_addr_type != BD_ADDR_TYPE_LE_PUBLIC; 4904 bool advertising_change = (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_PARAMS) != 0; 4905 if (advertising_change || 4906 (advertising_uses_random_address && random_address_change) || 4907 (hci_stack->le_advertisements_enabled_for_current_roles == 0) || 4908 (advertising_uses_whitelist && whitelist_modification_pending) || 4909 resolving_list_modification_pending || 4910 random_address_change) { 4911 4912 advertising_stop = true; 4913 } 4914 } 4915 4916 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 4917 if (hci_extended_advertising_supported() && (advertising_stop == false)){ 4918 btstack_linked_list_iterator_t it; 4919 btstack_linked_list_iterator_init(&it, &hci_stack->le_advertising_sets); 4920 while (btstack_linked_list_iterator_has_next(&it)){ 4921 le_advertising_set_t * advertising_set = (le_advertising_set_t*) btstack_linked_list_iterator_next(&it); 4922 if ((advertising_set->state & LE_ADVERTISEMENT_STATE_ACTIVE) != 0) { 4923 // stop if: 4924 // - parameter change required 4925 // - random address used in connectable advertising and changes 4926 // - it's disabled 4927 // - whitelist change required but used for advertisement filter policy 4928 // - resolving list modified 4929 // - own address changes 4930 // - advertisement set will be removed 4931 bool advertising_uses_whitelist = advertising_set->extended_params.advertising_filter_policy != 0; 4932 bool advertising_connectable = (advertising_set->extended_params.advertising_event_properties & 1) != 0; 4933 bool advertising_uses_random_address = 4934 (advertising_set->extended_params.own_address_type != BD_ADDR_TYPE_LE_PUBLIC) && 4935 advertising_connectable; 4936 bool advertising_parameter_change = (advertising_set->tasks & LE_ADVERTISEMENT_TASKS_SET_PARAMS) != 0; 4937 bool advertising_enabled = (advertising_set->state & LE_ADVERTISEMENT_STATE_ENABLED) != 0; 4938 bool advertising_set_random_address_change = 4939 (advertising_set->tasks & LE_ADVERTISEMENT_TASKS_SET_ADDRESS) != 0; 4940 bool advertising_set_will_be_removed = 4941 (advertising_set->state & LE_ADVERTISEMENT_TASKS_REMOVE_SET) != 0; 4942 if (advertising_parameter_change || 4943 (advertising_uses_random_address && advertising_set_random_address_change) || 4944 (advertising_enabled == false) || 4945 (advertising_uses_whitelist && whitelist_modification_pending) || 4946 resolving_list_modification_pending || 4947 advertising_set_will_be_removed) { 4948 4949 advertising_stop = true; 4950 advertising_stop_set = advertising_set; 4951 break; 4952 } 4953 } 4954 if ((advertising_set->state & LE_ADVERTISEMENT_STATE_PERIODIC_ACTIVE) != 0) { 4955 // stop if: 4956 // - it's disabled 4957 // - parameter change required 4958 bool periodic_enabled = (advertising_set->state & LE_ADVERTISEMENT_STATE_PERIODIC_ENABLED) != 0; 4959 bool periodic_parameter_change = (advertising_set->tasks & LE_ADVERTISEMENT_TASKS_SET_PERIODIC_PARAMS) != 0; 4960 if ((periodic_enabled == false) || periodic_parameter_change){ 4961 periodic_stop = true; 4962 advertising_stop_set = advertising_set; 4963 } 4964 } 4965 } 4966 } 4967 #endif 4968 4969 #endif 4970 4971 4972 // Phase 2: stop everything that should be off during modifications 4973 4974 #ifdef ENABLE_LE_CENTRAL 4975 if (scanning_stop){ 4976 hci_stack->le_scanning_active = false; 4977 hci_le_scan_stop(); 4978 return true; 4979 } 4980 #endif 4981 4982 #ifdef ENABLE_LE_CENTRAL 4983 if (connecting_stop){ 4984 hci_send_cmd(&hci_le_create_connection_cancel); 4985 return true; 4986 } 4987 #endif 4988 4989 #ifdef ENABLE_LE_PERIPHERAL 4990 if (advertising_stop){ 4991 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 4992 if (hci_extended_advertising_supported()) { 4993 uint8_t advertising_stop_handle; 4994 if (advertising_stop_set != NULL){ 4995 advertising_stop_handle = advertising_stop_set->advertising_handle; 4996 advertising_stop_set->state &= ~LE_ADVERTISEMENT_STATE_ACTIVE; 4997 } else { 4998 advertising_stop_handle = 0; 4999 hci_stack->le_advertisements_state &= ~LE_ADVERTISEMENT_STATE_ACTIVE; 5000 } 5001 const uint8_t advertising_handles[] = { advertising_stop_handle }; 5002 const uint16_t durations[] = { 0 }; 5003 const uint16_t max_events[] = { 0 }; 5004 hci_send_cmd(&hci_le_set_extended_advertising_enable, 0, 1, advertising_handles, durations, max_events); 5005 } else 5006 #endif 5007 { 5008 hci_stack->le_advertisements_state &= ~LE_ADVERTISEMENT_STATE_ACTIVE; 5009 hci_send_cmd(&hci_le_set_advertise_enable, 0); 5010 } 5011 return true; 5012 } 5013 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 5014 if (periodic_stop){ 5015 advertising_stop_set->state &= ~LE_ADVERTISEMENT_STATE_PERIODIC_ACTIVE; 5016 hci_send_cmd(&hci_le_set_periodic_advertising_enable, 0, advertising_stop_set->advertising_handle); 5017 return true; 5018 } 5019 #endif 5020 #endif 5021 5022 // Phase 3: modify 5023 5024 if (random_address_change){ 5025 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_SET_ADDRESS; 5026 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 5027 if (hci_extended_advertising_supported()) { 5028 hci_send_cmd(&hci_le_set_advertising_set_random_address, 0, hci_stack->le_random_address); 5029 } 5030 #endif 5031 { 5032 hci_send_cmd(&hci_le_set_random_address, hci_stack->le_random_address); 5033 } 5034 return true; 5035 } 5036 5037 #ifdef ENABLE_LE_CENTRAL 5038 if (hci_stack->le_scanning_param_update){ 5039 hci_stack->le_scanning_param_update = false; 5040 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 5041 if (hci_extended_advertising_supported()){ 5042 // prepare arrays for all PHYs 5043 uint8_t scan_types[1] = { hci_stack->le_scan_type }; 5044 uint16_t scan_intervals[1] = { hci_stack->le_scan_interval }; 5045 uint16_t scan_windows[1] = { hci_stack->le_scan_window }; 5046 uint8_t scanning_phys = 1; // LE 1M PHY 5047 hci_send_cmd(&hci_le_set_extended_scan_parameters, hci_stack->le_own_addr_type, 5048 hci_stack->le_scan_filter_policy, scanning_phys, scan_types, scan_intervals, scan_windows); 5049 } else 5050 #endif 5051 { 5052 hci_send_cmd(&hci_le_set_scan_parameters, hci_stack->le_scan_type, hci_stack->le_scan_interval, hci_stack->le_scan_window, 5053 hci_stack->le_own_addr_type, hci_stack->le_scan_filter_policy); 5054 } 5055 return true; 5056 } 5057 #endif 5058 5059 #ifdef ENABLE_LE_PERIPHERAL 5060 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_PARAMS){ 5061 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_SET_PARAMS; 5062 hci_stack->le_advertisements_own_addr_type = hci_stack->le_own_addr_type; 5063 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 5064 if (hci_extended_advertising_supported()){ 5065 // map advertisment type to advertising event properties 5066 uint16_t adv_event_properties = 0; 5067 const uint16_t mapping[] = { 0b00010011, 0b00010101, 0b00011101, 0b00010010, 0b00010000}; 5068 if (hci_stack->le_advertisements_type < (sizeof(mapping)/sizeof(uint16_t))){ 5069 adv_event_properties = mapping[hci_stack->le_advertisements_type]; 5070 } 5071 hci_stack->le_advertising_set_in_current_command = 0; 5072 hci_send_cmd(&hci_le_set_extended_advertising_parameters, 5073 0, 5074 adv_event_properties, 5075 hci_stack->le_advertisements_interval_min, 5076 hci_stack->le_advertisements_interval_max, 5077 hci_stack->le_advertisements_channel_map, 5078 hci_stack->le_advertisements_own_addr_type, 5079 hci_stack->le_advertisements_direct_address_type, 5080 hci_stack->le_advertisements_direct_address, 5081 hci_stack->le_advertisements_filter_policy, 5082 0x7f, // tx power: no preference 5083 0x01, // primary adv phy: LE 1M 5084 0, // secondary adv max skip 5085 0, // secondary adv phy 5086 0, // adv sid 5087 0 // scan request notification 5088 ); 5089 } 5090 #endif 5091 { 5092 hci_send_cmd(&hci_le_set_advertising_parameters, 5093 hci_stack->le_advertisements_interval_min, 5094 hci_stack->le_advertisements_interval_max, 5095 hci_stack->le_advertisements_type, 5096 hci_stack->le_advertisements_own_addr_type, 5097 hci_stack->le_advertisements_direct_address_type, 5098 hci_stack->le_advertisements_direct_address, 5099 hci_stack->le_advertisements_channel_map, 5100 hci_stack->le_advertisements_filter_policy); 5101 } 5102 return true; 5103 } 5104 5105 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_ADV_DATA){ 5106 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_SET_ADV_DATA; 5107 uint8_t adv_data_clean[31]; 5108 memset(adv_data_clean, 0, sizeof(adv_data_clean)); 5109 (void)memcpy(adv_data_clean, hci_stack->le_advertisements_data, 5110 hci_stack->le_advertisements_data_len); 5111 btstack_replace_bd_addr_placeholder(adv_data_clean, hci_stack->le_advertisements_data_len, hci_stack->local_bd_addr); 5112 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 5113 if (hci_extended_advertising_supported()){ 5114 hci_stack->le_advertising_set_in_current_command = 0; 5115 hci_send_cmd(&hci_le_set_extended_advertising_data, 0, 0x03, 0x01, hci_stack->le_advertisements_data_len, adv_data_clean); 5116 } else 5117 #endif 5118 { 5119 hci_send_cmd(&hci_le_set_advertising_data, hci_stack->le_advertisements_data_len, adv_data_clean); 5120 } 5121 return true; 5122 } 5123 5124 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA){ 5125 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA; 5126 uint8_t scan_data_clean[31]; 5127 memset(scan_data_clean, 0, sizeof(scan_data_clean)); 5128 (void)memcpy(scan_data_clean, hci_stack->le_scan_response_data, 5129 hci_stack->le_scan_response_data_len); 5130 btstack_replace_bd_addr_placeholder(scan_data_clean, hci_stack->le_scan_response_data_len, hci_stack->local_bd_addr); 5131 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 5132 if (hci_extended_advertising_supported()){ 5133 hci_stack->le_advertising_set_in_current_command = 0; 5134 hci_send_cmd(&hci_le_set_extended_scan_response_data, 0, 0x03, 0x01, hci_stack->le_scan_response_data_len, scan_data_clean); 5135 } else 5136 #endif 5137 { 5138 hci_send_cmd(&hci_le_set_scan_response_data, hci_stack->le_scan_response_data_len, scan_data_clean); 5139 } 5140 return true; 5141 } 5142 5143 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 5144 if (hci_extended_advertising_supported()) { 5145 btstack_linked_list_iterator_t it; 5146 btstack_linked_list_iterator_init(&it, &hci_stack->le_advertising_sets); 5147 while (btstack_linked_list_iterator_has_next(&it)){ 5148 le_advertising_set_t * advertising_set = (le_advertising_set_t*) btstack_linked_list_iterator_next(&it); 5149 if ((advertising_set->tasks & LE_ADVERTISEMENT_TASKS_REMOVE_SET) != 0) { 5150 advertising_set->tasks &= ~LE_ADVERTISEMENT_TASKS_REMOVE_SET; 5151 hci_stack->le_advertising_set_in_current_command = advertising_set->advertising_handle; 5152 hci_send_cmd(&hci_le_remove_advertising_set, advertising_set->advertising_handle); 5153 return true; 5154 } 5155 if ((advertising_set->tasks & LE_ADVERTISEMENT_TASKS_SET_ADDRESS) != 0){ 5156 advertising_set->tasks &= ~LE_ADVERTISEMENT_TASKS_SET_ADDRESS; 5157 hci_send_cmd(&hci_le_set_advertising_set_random_address, advertising_set->advertising_handle, advertising_set->random_address); 5158 return true; 5159 } 5160 if ((advertising_set->tasks & LE_ADVERTISEMENT_TASKS_SET_PARAMS) != 0){ 5161 advertising_set->tasks &= ~LE_ADVERTISEMENT_TASKS_SET_PARAMS; 5162 hci_stack->le_advertising_set_in_current_command = advertising_set->advertising_handle; 5163 hci_send_cmd(&hci_le_set_extended_advertising_parameters, 5164 advertising_set->advertising_handle, 5165 advertising_set->extended_params.advertising_event_properties, 5166 advertising_set->extended_params.primary_advertising_interval_min, 5167 advertising_set->extended_params.primary_advertising_interval_max, 5168 advertising_set->extended_params.primary_advertising_channel_map, 5169 advertising_set->extended_params.own_address_type, 5170 advertising_set->extended_params.peer_address_type, 5171 advertising_set->extended_params.peer_address, 5172 advertising_set->extended_params.advertising_filter_policy, 5173 advertising_set->extended_params.advertising_tx_power, 5174 advertising_set->extended_params.primary_advertising_phy, 5175 advertising_set->extended_params.secondary_advertising_max_skip, 5176 advertising_set->extended_params.secondary_advertising_phy, 5177 advertising_set->extended_params.advertising_sid, 5178 advertising_set->extended_params.scan_request_notification_enable 5179 ); 5180 return true; 5181 } 5182 if ((advertising_set->tasks & LE_ADVERTISEMENT_TASKS_SET_ADV_DATA) != 0) { 5183 uint16_t pos = advertising_set->adv_data_pos; 5184 uint8_t operation = hci_le_extended_advertising_operation_for_chunk(pos, advertising_set->adv_data_len); 5185 uint16_t data_to_upload = btstack_min(advertising_set->adv_data_len - pos, LE_EXTENDED_ADVERTISING_MAX_CHUNK_LEN); 5186 if ((operation & 0x02) != 0){ 5187 // last fragment or complete data 5188 operation |= 2; 5189 advertising_set->adv_data_pos = 0; 5190 advertising_set->tasks &= ~LE_ADVERTISEMENT_TASKS_SET_ADV_DATA; 5191 } else { 5192 advertising_set->adv_data_pos += data_to_upload; 5193 } 5194 hci_stack->le_advertising_set_in_current_command = advertising_set->advertising_handle; 5195 hci_send_cmd(&hci_le_set_extended_advertising_data, advertising_set->advertising_handle, operation, 0x01, data_to_upload, &advertising_set->adv_data[pos]); 5196 return true; 5197 } 5198 if ((advertising_set->tasks & LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA) != 0) { 5199 uint16_t pos = advertising_set->scan_data_pos; 5200 uint8_t operation = hci_le_extended_advertising_operation_for_chunk(pos, advertising_set->scan_data_len); 5201 uint16_t data_to_upload = btstack_min(advertising_set->scan_data_len - pos, LE_EXTENDED_ADVERTISING_MAX_CHUNK_LEN); 5202 if ((operation & 0x02) != 0){ 5203 advertising_set->scan_data_pos = 0; 5204 advertising_set->tasks &= ~LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA; 5205 } else { 5206 advertising_set->scan_data_pos += data_to_upload; 5207 } 5208 hci_stack->le_advertising_set_in_current_command = advertising_set->advertising_handle; 5209 hci_send_cmd(&hci_le_set_extended_scan_response_data, operation, 0x03, 0x01, data_to_upload, &advertising_set->scan_data[pos]); 5210 return true; 5211 } 5212 if ((advertising_set->tasks & LE_ADVERTISEMENT_TASKS_SET_PERIODIC_PARAMS) != 0){ 5213 advertising_set->tasks &= ~LE_ADVERTISEMENT_TASKS_SET_PERIODIC_PARAMS; 5214 hci_stack->le_advertising_set_in_current_command = advertising_set->advertising_handle; 5215 hci_send_cmd(&hci_le_set_periodic_advertising_parameters, 5216 advertising_set->advertising_handle, 5217 advertising_set->periodic_params.periodic_advertising_interval_min, 5218 advertising_set->periodic_params.periodic_advertising_interval_max, 5219 advertising_set->periodic_params.periodic_advertising_properties); 5220 return true; 5221 } 5222 if ((advertising_set->tasks & LE_ADVERTISEMENT_TASKS_SET_PERIODIC_DATA) != 0) { 5223 uint16_t pos = advertising_set->periodic_data_pos; 5224 uint8_t operation = hci_le_extended_advertising_operation_for_chunk(pos, advertising_set->periodic_data_len); 5225 uint16_t data_to_upload = btstack_min(advertising_set->periodic_data_len - pos, LE_EXTENDED_ADVERTISING_MAX_CHUNK_LEN); 5226 if ((operation & 0x02) != 0){ 5227 // last fragment or complete data 5228 operation |= 2; 5229 advertising_set->periodic_data_pos = 0; 5230 advertising_set->tasks &= ~LE_ADVERTISEMENT_TASKS_SET_PERIODIC_DATA; 5231 } else { 5232 advertising_set->periodic_data_pos += data_to_upload; 5233 } 5234 hci_stack->le_advertising_set_in_current_command = advertising_set->advertising_handle; 5235 hci_send_cmd(&hci_le_set_periodic_advertising_data, advertising_set->advertising_handle, operation, data_to_upload, &advertising_set->periodic_data[pos]); 5236 return true; 5237 } 5238 } 5239 } 5240 #endif 5241 5242 5243 #endif 5244 5245 5246 #ifdef ENABLE_LE_CENTRAL 5247 // if connect with whitelist was active and is not cancelled yet, wait until next time 5248 if (hci_stack->le_connecting_state == LE_CONNECTING_CANCEL) return false; 5249 #endif 5250 5251 // LE Whitelist Management 5252 if (whitelist_modification_pending){ 5253 // add/remove entries 5254 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 5255 while (btstack_linked_list_iterator_has_next(&lit)){ 5256 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&lit); 5257 if (entry->state & LE_WHITELIST_REMOVE_FROM_CONTROLLER){ 5258 entry->state &= ~LE_WHITELIST_REMOVE_FROM_CONTROLLER; 5259 hci_send_cmd(&hci_le_remove_device_from_white_list, entry->address_type, entry->address); 5260 return true; 5261 } 5262 if (entry->state & LE_WHITELIST_ADD_TO_CONTROLLER){ 5263 entry->state &= ~LE_WHITELIST_ADD_TO_CONTROLLER; 5264 entry->state |= LE_WHITELIST_ON_CONTROLLER; 5265 hci_send_cmd(&hci_le_add_device_to_white_list, entry->address_type, entry->address); 5266 return true; 5267 } 5268 if ((entry->state & LE_WHITELIST_ON_CONTROLLER) == 0){ 5269 btstack_linked_list_remove(&hci_stack->le_whitelist, (btstack_linked_item_t *) entry); 5270 btstack_memory_whitelist_entry_free(entry); 5271 } 5272 } 5273 } 5274 5275 #ifdef ENABLE_LE_PRIVACY_ADDRESS_RESOLUTION 5276 // LE Resolving List Management 5277 if (resolving_list_supported) { 5278 uint16_t i; 5279 switch (hci_stack->le_resolving_list_state) { 5280 case LE_RESOLVING_LIST_SEND_ENABLE_ADDRESS_RESOLUTION: 5281 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_READ_SIZE; 5282 hci_send_cmd(&hci_le_set_address_resolution_enabled, 1); 5283 return true; 5284 case LE_RESOLVING_LIST_READ_SIZE: 5285 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_SEND_CLEAR; 5286 hci_send_cmd(&hci_le_read_resolving_list_size); 5287 return true; 5288 case LE_RESOLVING_LIST_SEND_CLEAR: 5289 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_REMOVE_ENTRIES; 5290 (void) memset(hci_stack->le_resolving_list_add_entries, 0xff, 5291 sizeof(hci_stack->le_resolving_list_add_entries)); 5292 (void) memset(hci_stack->le_resolving_list_remove_entries, 0, 5293 sizeof(hci_stack->le_resolving_list_remove_entries)); 5294 hci_send_cmd(&hci_le_clear_resolving_list); 5295 return true; 5296 case LE_RESOLVING_LIST_REMOVE_ENTRIES: 5297 for (i = 0; i < MAX_NUM_RESOLVING_LIST_ENTRIES && i < le_device_db_max_count(); i++) { 5298 uint8_t offset = i >> 3; 5299 uint8_t mask = 1 << (i & 7); 5300 if ((hci_stack->le_resolving_list_remove_entries[offset] & mask) == 0) continue; 5301 hci_stack->le_resolving_list_remove_entries[offset] &= ~mask; 5302 bd_addr_t peer_identity_addreses; 5303 int peer_identity_addr_type = (int) BD_ADDR_TYPE_UNKNOWN; 5304 sm_key_t peer_irk; 5305 le_device_db_info(i, &peer_identity_addr_type, peer_identity_addreses, peer_irk); 5306 if (peer_identity_addr_type == BD_ADDR_TYPE_UNKNOWN) continue; 5307 5308 #ifdef ENABLE_LE_WHITELIST_TOUCH_AFTER_RESOLVING_LIST_UPDATE 5309 // trigger whitelist entry 'update' (work around for controller bug) 5310 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 5311 while (btstack_linked_list_iterator_has_next(&lit)) { 5312 whitelist_entry_t *entry = (whitelist_entry_t *) btstack_linked_list_iterator_next(&lit); 5313 if (entry->address_type != peer_identity_addr_type) continue; 5314 if (memcmp(entry->address, peer_identity_addreses, 6) != 0) continue; 5315 log_info("trigger whitelist update %s", bd_addr_to_str(peer_identity_addreses)); 5316 entry->state |= LE_WHITELIST_REMOVE_FROM_CONTROLLER | LE_WHITELIST_ADD_TO_CONTROLLER; 5317 } 5318 #endif 5319 5320 hci_send_cmd(&hci_le_remove_device_from_resolving_list, peer_identity_addr_type, 5321 peer_identity_addreses); 5322 return true; 5323 } 5324 5325 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_ADD_ENTRIES; 5326 5327 /* fall through */ 5328 5329 case LE_RESOLVING_LIST_ADD_ENTRIES: 5330 for (i = 0; i < MAX_NUM_RESOLVING_LIST_ENTRIES && i < le_device_db_max_count(); i++) { 5331 uint8_t offset = i >> 3; 5332 uint8_t mask = 1 << (i & 7); 5333 if ((hci_stack->le_resolving_list_add_entries[offset] & mask) == 0) continue; 5334 hci_stack->le_resolving_list_add_entries[offset] &= ~mask; 5335 bd_addr_t peer_identity_addreses; 5336 int peer_identity_addr_type = (int) BD_ADDR_TYPE_UNKNOWN; 5337 sm_key_t peer_irk; 5338 le_device_db_info(i, &peer_identity_addr_type, peer_identity_addreses, peer_irk); 5339 if (peer_identity_addr_type == BD_ADDR_TYPE_UNKNOWN) continue; 5340 const uint8_t *local_irk = gap_get_persistent_irk(); 5341 // command uses format specifier 'P' that stores 16-byte value without flip 5342 uint8_t local_irk_flipped[16]; 5343 uint8_t peer_irk_flipped[16]; 5344 reverse_128(local_irk, local_irk_flipped); 5345 reverse_128(peer_irk, peer_irk_flipped); 5346 hci_send_cmd(&hci_le_add_device_to_resolving_list, peer_identity_addr_type, peer_identity_addreses, 5347 peer_irk_flipped, local_irk_flipped); 5348 return true; 5349 } 5350 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_DONE; 5351 break; 5352 5353 default: 5354 break; 5355 } 5356 } 5357 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_DONE; 5358 #endif 5359 5360 // post-pone all actions until stack is fully working 5361 if (hci_stack->state != HCI_STATE_WORKING) return false; 5362 5363 // advertisements, active scanning, and creating connections requires random address to be set if using private address 5364 if ( (hci_stack->le_own_addr_type != BD_ADDR_TYPE_LE_PUBLIC) && (hci_stack->le_random_address_set == 0u) ) return false; 5365 5366 // Phase 4: restore state 5367 5368 #ifdef ENABLE_LE_CENTRAL 5369 // re-start scanning 5370 if ((hci_stack->le_scanning_enabled && !hci_stack->le_scanning_active)){ 5371 hci_stack->le_scanning_active = true; 5372 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 5373 if (hci_extended_advertising_supported()){ 5374 hci_send_cmd(&hci_le_set_extended_scan_enable, 1, 0, 0, 0); 5375 } else 5376 #endif 5377 { 5378 hci_send_cmd(&hci_le_set_scan_enable, 1, 0); 5379 } 5380 return true; 5381 } 5382 #endif 5383 5384 #ifdef ENABLE_LE_CENTRAL 5385 // re-start connecting 5386 if ( (hci_stack->le_connecting_state == LE_CONNECTING_IDLE) && (hci_stack->le_connecting_request == LE_CONNECTING_WHITELIST)){ 5387 bd_addr_t null_addr; 5388 memset(null_addr, 0, 6); 5389 hci_stack->le_connection_own_addr_type = hci_stack->le_own_addr_type; 5390 hci_get_own_address_for_addr_type(hci_stack->le_connection_own_addr_type, hci_stack->le_connection_own_address); 5391 hci_send_cmd(&hci_le_create_connection, 5392 hci_stack->le_connection_scan_interval, // scan interval: 60 ms 5393 hci_stack->le_connection_scan_window, // scan interval: 30 ms 5394 1, // use whitelist 5395 0, // peer address type 5396 null_addr, // peer bd addr 5397 hci_stack->le_connection_own_addr_type, // our addr type: 5398 hci_stack->le_connection_interval_min, // conn interval min 5399 hci_stack->le_connection_interval_max, // conn interval max 5400 hci_stack->le_connection_latency, // conn latency 5401 hci_stack->le_supervision_timeout, // conn latency 5402 hci_stack->le_minimum_ce_length, // min ce length 5403 hci_stack->le_maximum_ce_length // max ce length 5404 ); 5405 return true; 5406 } 5407 #endif 5408 5409 #ifdef ENABLE_LE_PERIPHERAL 5410 // re-start advertising 5411 if (hci_stack->le_advertisements_enabled_for_current_roles && ((hci_stack->le_advertisements_state & LE_ADVERTISEMENT_STATE_ACTIVE) == 0)){ 5412 // check if advertisements should be enabled given 5413 hci_stack->le_advertisements_state |= LE_ADVERTISEMENT_STATE_ACTIVE; 5414 hci_get_own_address_for_addr_type(hci_stack->le_advertisements_own_addr_type, hci_stack->le_advertisements_own_address); 5415 5416 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 5417 if (hci_extended_advertising_supported()){ 5418 const uint8_t advertising_handles[] = { 0 }; 5419 const uint16_t durations[] = { 0 }; 5420 const uint16_t max_events[] = { 0 }; 5421 hci_send_cmd(&hci_le_set_extended_advertising_enable, 1, 1, advertising_handles, durations, max_events); 5422 } else 5423 #endif 5424 { 5425 hci_send_cmd(&hci_le_set_advertise_enable, 1); 5426 } 5427 return true; 5428 } 5429 5430 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 5431 if (hci_extended_advertising_supported()) { 5432 btstack_linked_list_iterator_t it; 5433 btstack_linked_list_iterator_init(&it, &hci_stack->le_advertising_sets); 5434 while (btstack_linked_list_iterator_has_next(&it)) { 5435 le_advertising_set_t *advertising_set = (le_advertising_set_t *) btstack_linked_list_iterator_next(&it); 5436 if (((advertising_set->state & LE_ADVERTISEMENT_STATE_ENABLED) != 0) && ((advertising_set->state & LE_ADVERTISEMENT_STATE_ACTIVE) == 0)){ 5437 advertising_set->state |= LE_ADVERTISEMENT_STATE_ACTIVE; 5438 const uint8_t advertising_handles[] = { advertising_set->advertising_handle }; 5439 const uint16_t durations[] = { advertising_set->enable_timeout }; 5440 const uint16_t max_events[] = { advertising_set->enable_max_scan_events }; 5441 hci_send_cmd(&hci_le_set_extended_advertising_enable, 1, 1, advertising_handles, durations, max_events); 5442 return true; 5443 } 5444 if (((advertising_set->state & LE_ADVERTISEMENT_STATE_PERIODIC_ENABLED) != 0) && ((advertising_set->state & LE_ADVERTISEMENT_STATE_PERIODIC_ACTIVE) == 0)){ 5445 advertising_set->state |= LE_ADVERTISEMENT_STATE_PERIODIC_ACTIVE; 5446 uint8_t enable = 1; 5447 if (advertising_set->periodic_include_adi){ 5448 enable |= 2; 5449 } 5450 hci_send_cmd(&hci_le_set_periodic_advertising_enable, enable, advertising_set->advertising_handle); 5451 return true; 5452 } 5453 } 5454 } 5455 #endif 5456 #endif 5457 5458 return false; 5459 } 5460 #endif 5461 5462 static bool hci_run_general_pending_commands(void){ 5463 btstack_linked_item_t * it; 5464 for (it = (btstack_linked_item_t *) hci_stack->connections; it != NULL; it = it->next){ 5465 hci_connection_t * connection = (hci_connection_t *) it; 5466 5467 switch(connection->state){ 5468 case SEND_CREATE_CONNECTION: 5469 switch(connection->address_type){ 5470 #ifdef ENABLE_CLASSIC 5471 case BD_ADDR_TYPE_ACL: 5472 log_info("sending hci_create_connection"); 5473 hci_send_cmd(&hci_create_connection, connection->address, hci_usable_acl_packet_types(), 0, 0, 0, hci_stack->allow_role_switch); 5474 break; 5475 #endif 5476 default: 5477 #ifdef ENABLE_BLE 5478 #ifdef ENABLE_LE_CENTRAL 5479 log_info("sending hci_le_create_connection"); 5480 hci_stack->le_connection_own_addr_type = hci_stack->le_own_addr_type; 5481 hci_get_own_address_for_addr_type(hci_stack->le_connection_own_addr_type, hci_stack->le_connection_own_address); 5482 hci_send_cmd(&hci_le_create_connection, 5483 hci_stack->le_connection_scan_interval, // conn scan interval 5484 hci_stack->le_connection_scan_window, // conn scan windows 5485 0, // don't use whitelist 5486 connection->address_type, // peer address type 5487 connection->address, // peer bd addr 5488 hci_stack->le_connection_own_addr_type, // our addr type: 5489 hci_stack->le_connection_interval_min, // conn interval min 5490 hci_stack->le_connection_interval_max, // conn interval max 5491 hci_stack->le_connection_latency, // conn latency 5492 hci_stack->le_supervision_timeout, // conn latency 5493 hci_stack->le_minimum_ce_length, // min ce length 5494 hci_stack->le_maximum_ce_length // max ce length 5495 ); 5496 connection->state = SENT_CREATE_CONNECTION; 5497 #endif 5498 #endif 5499 break; 5500 } 5501 return true; 5502 5503 #ifdef ENABLE_CLASSIC 5504 case RECEIVED_CONNECTION_REQUEST: 5505 connection->role = HCI_ROLE_SLAVE; 5506 if (connection->address_type == BD_ADDR_TYPE_ACL){ 5507 log_info("sending hci_accept_connection_request"); 5508 connection->state = ACCEPTED_CONNECTION_REQUEST; 5509 hci_send_cmd(&hci_accept_connection_request, connection->address, hci_stack->master_slave_policy); 5510 return true; 5511 } 5512 break; 5513 #endif 5514 5515 #ifdef ENABLE_BLE 5516 #ifdef ENABLE_LE_CENTRAL 5517 case SEND_CANCEL_CONNECTION: 5518 connection->state = SENT_CANCEL_CONNECTION; 5519 hci_send_cmd(&hci_le_create_connection_cancel); 5520 return true; 5521 #endif 5522 #endif 5523 case SEND_DISCONNECT: 5524 connection->state = SENT_DISCONNECT; 5525 hci_send_cmd(&hci_disconnect, connection->con_handle, ERROR_CODE_REMOTE_USER_TERMINATED_CONNECTION); 5526 return true; 5527 5528 default: 5529 break; 5530 } 5531 5532 // no further commands if connection is about to get shut down 5533 if (connection->state == SENT_DISCONNECT) continue; 5534 5535 #ifdef ENABLE_CLASSIC 5536 5537 // Handling link key request requires remote supported features 5538 if (((connection->authentication_flags & AUTH_FLAG_HANDLE_LINK_KEY_REQUEST) != 0)){ 5539 log_info("responding to link key request, have link key db: %u", hci_stack->link_key_db != NULL); 5540 connectionClearAuthenticationFlags(connection, AUTH_FLAG_HANDLE_LINK_KEY_REQUEST); 5541 5542 bool have_link_key = connection->link_key_type != INVALID_LINK_KEY; 5543 bool security_level_sufficient = have_link_key && (gap_security_level_for_link_key_type(connection->link_key_type) >= connection->requested_security_level); 5544 if (have_link_key && security_level_sufficient){ 5545 hci_send_cmd(&hci_link_key_request_reply, connection->address, &connection->link_key); 5546 } else { 5547 hci_send_cmd(&hci_link_key_request_negative_reply, connection->address); 5548 } 5549 return true; 5550 } 5551 5552 if (connection->authentication_flags & AUTH_FLAG_DENY_PIN_CODE_REQUEST){ 5553 log_info("denying to pin request"); 5554 connectionClearAuthenticationFlags(connection, AUTH_FLAG_DENY_PIN_CODE_REQUEST); 5555 hci_send_cmd(&hci_pin_code_request_negative_reply, connection->address); 5556 return true; 5557 } 5558 5559 // security assessment requires remote features 5560 if ((connection->authentication_flags & AUTH_FLAG_RECV_IO_CAPABILITIES_REQUEST) != 0){ 5561 connectionClearAuthenticationFlags(connection, AUTH_FLAG_RECV_IO_CAPABILITIES_REQUEST); 5562 hci_ssp_assess_security_on_io_cap_request(connection); 5563 // 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 5564 } 5565 5566 if (connection->authentication_flags & AUTH_FLAG_SEND_IO_CAPABILITIES_REPLY){ 5567 connectionClearAuthenticationFlags(connection, AUTH_FLAG_SEND_IO_CAPABILITIES_REPLY); 5568 // set authentication requirements: 5569 // - MITM = ssp_authentication_requirement (USER) | requested_security_level (dynamic) 5570 // - BONDING MODE: dedicated if requested, bondable otherwise. Drop bondable if not set for remote 5571 uint8_t authreq = hci_stack->ssp_authentication_requirement & 1; 5572 if (gap_mitm_protection_required_for_security_level(connection->requested_security_level)){ 5573 authreq |= 1; 5574 } 5575 bool bonding = hci_stack->bondable; 5576 if (connection->authentication_flags & AUTH_FLAG_RECV_IO_CAPABILITIES_RESPONSE){ 5577 // if we have received IO Cap Response, we're in responder role 5578 bool remote_bonding = connection->io_cap_response_auth_req >= SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_DEDICATED_BONDING; 5579 if (bonding && !remote_bonding){ 5580 log_info("Remote not bonding, dropping local flag"); 5581 bonding = false; 5582 } 5583 } 5584 if (bonding){ 5585 if (connection->bonding_flags & BONDING_DEDICATED){ 5586 authreq |= SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_DEDICATED_BONDING; 5587 } else { 5588 authreq |= SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_GENERAL_BONDING; 5589 } 5590 } 5591 uint8_t have_oob_data = 0; 5592 #ifdef ENABLE_CLASSIC_PAIRING_OOB 5593 if (connection->classic_oob_c_192 != NULL){ 5594 have_oob_data |= 1; 5595 } 5596 if (connection->classic_oob_c_256 != NULL){ 5597 have_oob_data |= 2; 5598 } 5599 #endif 5600 hci_send_cmd(&hci_io_capability_request_reply, &connection->address, hci_stack->ssp_io_capability, have_oob_data, authreq); 5601 return true; 5602 } 5603 5604 if (connection->authentication_flags & AUTH_FLAG_SEND_IO_CAPABILITIES_NEGATIVE_REPLY) { 5605 connectionClearAuthenticationFlags(connection, AUTH_FLAG_SEND_IO_CAPABILITIES_NEGATIVE_REPLY); 5606 hci_send_cmd(&hci_io_capability_request_negative_reply, &connection->address, ERROR_CODE_PAIRING_NOT_ALLOWED); 5607 return true; 5608 } 5609 5610 #ifdef ENABLE_CLASSIC_PAIRING_OOB 5611 if (connection->authentication_flags & AUTH_FLAG_SEND_REMOTE_OOB_DATA_REPLY){ 5612 connectionClearAuthenticationFlags(connection, AUTH_FLAG_SEND_REMOTE_OOB_DATA_REPLY); 5613 const uint8_t zero[16] = { 0 }; 5614 const uint8_t * r_192 = zero; 5615 const uint8_t * c_192 = zero; 5616 const uint8_t * r_256 = zero; 5617 const uint8_t * c_256 = zero; 5618 // verify P-256 OOB 5619 if ((connection->classic_oob_c_256 != NULL) && hci_command_supported(SUPPORTED_HCI_COMMAND_REMOTE_OOB_EXTENDED_DATA_REQUEST_REPLY)) { 5620 c_256 = connection->classic_oob_c_256; 5621 if (connection->classic_oob_r_256 != NULL) { 5622 r_256 = connection->classic_oob_r_256; 5623 } 5624 } 5625 // verify P-192 OOB 5626 if ((connection->classic_oob_c_192 != NULL)) { 5627 c_192 = connection->classic_oob_c_192; 5628 if (connection->classic_oob_r_192 != NULL) { 5629 r_192 = connection->classic_oob_r_192; 5630 } 5631 } 5632 5633 // assess security 5634 bool need_level_4 = hci_stack->gap_secure_connections_only_mode || (connection->requested_security_level == LEVEL_4); 5635 bool can_reach_level_4 = hci_remote_sc_enabled(connection) && (c_256 != NULL); 5636 if (need_level_4 && !can_reach_level_4){ 5637 log_info("Level 4 required, but not possible -> abort"); 5638 hci_pairing_complete(connection, ERROR_CODE_INSUFFICIENT_SECURITY); 5639 // send oob negative reply 5640 c_256 = NULL; 5641 c_192 = NULL; 5642 } 5643 5644 // Reply 5645 if (c_256 != zero) { 5646 hci_send_cmd(&hci_remote_oob_extended_data_request_reply, &connection->address, c_192, r_192, c_256, r_256); 5647 } else if (c_192 != zero){ 5648 hci_send_cmd(&hci_remote_oob_data_request_reply, &connection->address, c_192, r_192); 5649 } else { 5650 hci_stack->classic_oob_con_handle = connection->con_handle; 5651 hci_send_cmd(&hci_remote_oob_data_request_negative_reply, &connection->address); 5652 } 5653 return true; 5654 } 5655 #endif 5656 5657 if (connection->authentication_flags & AUTH_FLAG_SEND_USER_CONFIRM_REPLY){ 5658 connectionClearAuthenticationFlags(connection, AUTH_FLAG_SEND_USER_CONFIRM_REPLY); 5659 hci_send_cmd(&hci_user_confirmation_request_reply, &connection->address); 5660 return true; 5661 } 5662 5663 if (connection->authentication_flags & AUTH_FLAG_SEND_USER_CONFIRM_NEGATIVE_REPLY){ 5664 connectionClearAuthenticationFlags(connection, AUTH_FLAG_SEND_USER_CONFIRM_NEGATIVE_REPLY); 5665 hci_send_cmd(&hci_user_confirmation_request_negative_reply, &connection->address); 5666 return true; 5667 } 5668 5669 if (connection->authentication_flags & AUTH_FLAG_SEND_USER_PASSKEY_REPLY){ 5670 connectionClearAuthenticationFlags(connection, AUTH_FLAG_SEND_USER_PASSKEY_REPLY); 5671 hci_send_cmd(&hci_user_passkey_request_reply, &connection->address, 000000); 5672 return true; 5673 } 5674 5675 if (connection->bonding_flags & BONDING_DISCONNECT_DEDICATED_DONE){ 5676 connection->bonding_flags &= ~BONDING_DISCONNECT_DEDICATED_DONE; 5677 connection->bonding_flags |= BONDING_EMIT_COMPLETE_ON_DISCONNECT; 5678 connection->state = SENT_DISCONNECT; 5679 hci_send_cmd(&hci_disconnect, connection->con_handle, ERROR_CODE_REMOTE_USER_TERMINATED_CONNECTION); 5680 return true; 5681 } 5682 5683 if ((connection->bonding_flags & BONDING_SEND_AUTHENTICATE_REQUEST) && ((connection->bonding_flags & BONDING_RECEIVED_REMOTE_FEATURES) != 0)){ 5684 connection->bonding_flags &= ~BONDING_SEND_AUTHENTICATE_REQUEST; 5685 connection->bonding_flags |= BONDING_SENT_AUTHENTICATE_REQUEST; 5686 hci_send_cmd(&hci_authentication_requested, connection->con_handle); 5687 return true; 5688 } 5689 5690 if (connection->bonding_flags & BONDING_SEND_ENCRYPTION_REQUEST){ 5691 connection->bonding_flags &= ~BONDING_SEND_ENCRYPTION_REQUEST; 5692 hci_send_cmd(&hci_set_connection_encryption, connection->con_handle, 1); 5693 return true; 5694 } 5695 5696 if (connection->bonding_flags & BONDING_SEND_READ_ENCRYPTION_KEY_SIZE){ 5697 connection->bonding_flags &= ~BONDING_SEND_READ_ENCRYPTION_KEY_SIZE; 5698 hci_send_cmd(&hci_read_encryption_key_size, connection->con_handle, 1); 5699 return true; 5700 } 5701 5702 if (connection->bonding_flags & BONDING_REQUEST_REMOTE_FEATURES_PAGE_0){ 5703 connection->bonding_flags &= ~BONDING_REQUEST_REMOTE_FEATURES_PAGE_0; 5704 hci_send_cmd(&hci_read_remote_supported_features_command, connection->con_handle); 5705 return true; 5706 } 5707 5708 if (connection->bonding_flags & BONDING_REQUEST_REMOTE_FEATURES_PAGE_1){ 5709 connection->bonding_flags &= ~BONDING_REQUEST_REMOTE_FEATURES_PAGE_1; 5710 hci_send_cmd(&hci_read_remote_extended_features_command, connection->con_handle, 1); 5711 return true; 5712 } 5713 5714 if (connection->bonding_flags & BONDING_REQUEST_REMOTE_FEATURES_PAGE_2){ 5715 connection->bonding_flags &= ~BONDING_REQUEST_REMOTE_FEATURES_PAGE_2; 5716 hci_send_cmd(&hci_read_remote_extended_features_command, connection->con_handle, 2); 5717 return true; 5718 } 5719 #endif 5720 5721 if (connection->bonding_flags & BONDING_DISCONNECT_SECURITY_BLOCK){ 5722 connection->bonding_flags &= ~BONDING_DISCONNECT_SECURITY_BLOCK; 5723 #ifdef ENABLE_CLASSIC 5724 hci_pairing_complete(connection, ERROR_CODE_CONNECTION_REJECTED_DUE_TO_SECURITY_REASONS); 5725 #endif 5726 if (connection->state != SENT_DISCONNECT){ 5727 connection->state = SENT_DISCONNECT; 5728 hci_send_cmd(&hci_disconnect, connection->con_handle, ERROR_CODE_AUTHENTICATION_FAILURE); 5729 return true; 5730 } 5731 } 5732 5733 #ifdef ENABLE_CLASSIC 5734 uint16_t sniff_min_interval; 5735 switch (connection->sniff_min_interval){ 5736 case 0: 5737 break; 5738 case 0xffff: 5739 connection->sniff_min_interval = 0; 5740 hci_send_cmd(&hci_exit_sniff_mode, connection->con_handle); 5741 return true; 5742 default: 5743 sniff_min_interval = connection->sniff_min_interval; 5744 connection->sniff_min_interval = 0; 5745 hci_send_cmd(&hci_sniff_mode, connection->con_handle, connection->sniff_max_interval, sniff_min_interval, connection->sniff_attempt, connection->sniff_timeout); 5746 return true; 5747 } 5748 5749 if (connection->sniff_subrating_max_latency != 0xffff){ 5750 uint16_t max_latency = connection->sniff_subrating_max_latency; 5751 connection->sniff_subrating_max_latency = 0; 5752 hci_send_cmd(&hci_sniff_subrating, connection->con_handle, max_latency, connection->sniff_subrating_min_remote_timeout, connection->sniff_subrating_min_local_timeout); 5753 return true; 5754 } 5755 5756 if (connection->qos_service_type != HCI_SERVICE_TYPE_INVALID){ 5757 uint8_t service_type = (uint8_t) connection->qos_service_type; 5758 connection->qos_service_type = HCI_SERVICE_TYPE_INVALID; 5759 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); 5760 return true; 5761 } 5762 5763 if (connection->request_role != HCI_ROLE_INVALID){ 5764 hci_role_t role = connection->request_role; 5765 connection->request_role = HCI_ROLE_INVALID; 5766 hci_send_cmd(&hci_switch_role_command, connection->address, role); 5767 return true; 5768 } 5769 #endif 5770 5771 if (connection->gap_connection_tasks != 0){ 5772 #ifdef ENABLE_CLASSIC 5773 if ((connection->gap_connection_tasks & GAP_CONNECTION_TASK_WRITE_AUTOMATIC_FLUSH_TIMEOUT) != 0){ 5774 connection->gap_connection_tasks &= ~GAP_CONNECTION_TASK_WRITE_AUTOMATIC_FLUSH_TIMEOUT; 5775 hci_send_cmd(&hci_write_automatic_flush_timeout, connection->con_handle, hci_stack->automatic_flush_timeout); 5776 return true; 5777 } 5778 if (connection->gap_connection_tasks & GAP_CONNECTION_TASK_WRITE_SUPERVISION_TIMEOUT){ 5779 connection->gap_connection_tasks &= ~GAP_CONNECTION_TASK_WRITE_SUPERVISION_TIMEOUT; 5780 hci_send_cmd(&hci_write_link_supervision_timeout, connection->con_handle, hci_stack->link_supervision_timeout); 5781 return true; 5782 } 5783 #endif 5784 if (connection->gap_connection_tasks & GAP_CONNECTION_TASK_READ_RSSI){ 5785 connection->gap_connection_tasks &= ~GAP_CONNECTION_TASK_READ_RSSI; 5786 hci_send_cmd(&hci_read_rssi, connection->con_handle); 5787 return true; 5788 } 5789 } 5790 5791 #ifdef ENABLE_BLE 5792 switch (connection->le_con_parameter_update_state){ 5793 // response to L2CAP CON PARAMETER UPDATE REQUEST 5794 case CON_PARAMETER_UPDATE_CHANGE_HCI_CON_PARAMETERS: 5795 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NONE; 5796 hci_send_cmd(&hci_le_connection_update, connection->con_handle, connection->le_conn_interval_min, 5797 connection->le_conn_interval_max, connection->le_conn_latency, connection->le_supervision_timeout, 5798 0x0000, 0xffff); 5799 return true; 5800 case CON_PARAMETER_UPDATE_REPLY: 5801 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NONE; 5802 hci_send_cmd(&hci_le_remote_connection_parameter_request_reply, connection->con_handle, connection->le_conn_interval_min, 5803 connection->le_conn_interval_max, connection->le_conn_latency, connection->le_supervision_timeout, 5804 0x0000, 0xffff); 5805 return true; 5806 case CON_PARAMETER_UPDATE_NEGATIVE_REPLY: 5807 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NONE; 5808 hci_send_cmd(&hci_le_remote_connection_parameter_request_negative_reply, ERROR_CODE_UNSUPPORTED_LMP_PARAMETER_VALUE_UNSUPPORTED_LL_PARAMETER_VALUE); 5809 return true; 5810 default: 5811 break; 5812 } 5813 if (connection->le_phy_update_all_phys != 0xffu){ 5814 uint8_t all_phys = connection->le_phy_update_all_phys; 5815 connection->le_phy_update_all_phys = 0xff; 5816 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); 5817 return true; 5818 } 5819 #endif 5820 } 5821 return false; 5822 } 5823 5824 static void hci_run(void){ 5825 5826 // stack state sub statemachines 5827 // halting needs to be called even if we cannot send command packet now 5828 switch (hci_stack->state) { 5829 case HCI_STATE_INITIALIZING: 5830 hci_initializing_run(); 5831 break; 5832 case HCI_STATE_HALTING: 5833 hci_halting_run(); 5834 break; 5835 case HCI_STATE_FALLING_ASLEEP: 5836 hci_falling_asleep_run(); 5837 break; 5838 default: 5839 break; 5840 } 5841 5842 bool done; 5843 5844 // send continuation fragments first, as they block the prepared packet buffer 5845 done = hci_run_acl_fragments(); 5846 if (done) return; 5847 5848 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 5849 // send host num completed packets next as they don't require num_cmd_packets > 0 5850 if (!hci_can_send_comand_packet_transport()) return; 5851 if (hci_stack->host_completed_packets){ 5852 hci_host_num_completed_packets(); 5853 return; 5854 } 5855 #endif 5856 5857 if (!hci_can_send_command_packet_now()) return; 5858 5859 // global/non-connection oriented commands 5860 5861 5862 #ifdef ENABLE_CLASSIC 5863 // general gap classic 5864 done = hci_run_general_gap_classic(); 5865 if (done) return; 5866 #endif 5867 5868 #ifdef ENABLE_BLE 5869 // general gap le 5870 done = hci_run_general_gap_le(); 5871 if (done) return; 5872 #endif 5873 5874 // send pending HCI commands 5875 hci_run_general_pending_commands(); 5876 } 5877 5878 uint8_t hci_send_cmd_packet(uint8_t *packet, int size){ 5879 // house-keeping 5880 5881 #ifdef ENABLE_CLASSIC 5882 bd_addr_t addr; 5883 hci_connection_t * conn; 5884 #endif 5885 #ifdef ENABLE_LE_CENTRAL 5886 uint8_t initiator_filter_policy; 5887 #endif 5888 5889 uint16_t opcode = little_endian_read_16(packet, 0); 5890 switch (opcode) { 5891 case HCI_OPCODE_HCI_WRITE_LOOPBACK_MODE: 5892 hci_stack->loopback_mode = packet[3]; 5893 break; 5894 5895 #ifdef ENABLE_CLASSIC 5896 case HCI_OPCODE_HCI_CREATE_CONNECTION: 5897 reverse_bd_addr(&packet[3], addr); 5898 log_info("Create_connection to %s", bd_addr_to_str(addr)); 5899 5900 // CVE-2020-26555: reject outgoing connection to device with same BD ADDR 5901 if (memcmp(hci_stack->local_bd_addr, addr, 6) == 0) { 5902 hci_emit_connection_complete(addr, 0, ERROR_CODE_CONNECTION_REJECTED_DUE_TO_UNACCEPTABLE_BD_ADDR); 5903 return ERROR_CODE_CONNECTION_REJECTED_DUE_TO_UNACCEPTABLE_BD_ADDR; 5904 } 5905 5906 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 5907 if (!conn) { 5908 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 5909 if (!conn) { 5910 // notify client that alloc failed 5911 hci_emit_connection_complete(addr, 0, BTSTACK_MEMORY_ALLOC_FAILED); 5912 return BTSTACK_MEMORY_ALLOC_FAILED; // packet not sent to controller 5913 } 5914 conn->state = SEND_CREATE_CONNECTION; 5915 conn->role = HCI_ROLE_MASTER; 5916 } 5917 5918 conn->con_handle = HCI_CON_HANDLE_INVALID; 5919 conn->role = HCI_ROLE_INVALID; 5920 5921 log_info("conn state %u", conn->state); 5922 // TODO: L2CAP should not send create connection command, instead a (new) gap function should be used 5923 switch (conn->state) { 5924 // if connection active exists 5925 case OPEN: 5926 // and OPEN, emit connection complete command 5927 hci_emit_connection_complete(addr, conn->con_handle, ERROR_CODE_SUCCESS); 5928 // packet not sent to controller 5929 return ERROR_CODE_ACL_CONNECTION_ALREADY_EXISTS; 5930 case RECEIVED_DISCONNECTION_COMPLETE: 5931 // create connection triggered in disconnect complete event, let's do it now 5932 break; 5933 case SEND_CREATE_CONNECTION: 5934 #ifdef ENABLE_HCI_SERIALIZED_CONTROLLER_OPERATIONS 5935 if (hci_classic_operation_active()){ 5936 return ERROR_CODE_SUCCESS; 5937 } 5938 #endif 5939 // connection created by hci, e.g. dedicated bonding, but not executed yet, let's do it now 5940 break; 5941 default: 5942 // otherwise, just ignore as it is already in the open process 5943 // packet not sent to controller 5944 return ERROR_CODE_ACL_CONNECTION_ALREADY_EXISTS; 5945 } 5946 conn->state = SENT_CREATE_CONNECTION; 5947 5948 // track outgoing connection 5949 hci_stack->outgoing_addr_type = BD_ADDR_TYPE_ACL; 5950 (void) memcpy(hci_stack->outgoing_addr, addr, 6); 5951 break; 5952 5953 #if defined (ENABLE_SCO_OVER_HCI) || defined (HAVE_SCO_TRANSPORT) 5954 case HCI_OPCODE_HCI_SETUP_SYNCHRONOUS_CONNECTION: 5955 // setup_synchronous_connection? Voice setting at offset 22 5956 // TODO: compare to current setting if sco connection already active 5957 hci_stack->sco_voice_setting_active = little_endian_read_16(packet, 15); 5958 break; 5959 case HCI_OPCODE_HCI_ACCEPT_SYNCHRONOUS_CONNECTION: 5960 // accept_synchronous_connection? Voice setting at offset 18 5961 // TODO: compare to current setting if sco connection already active 5962 hci_stack->sco_voice_setting_active = little_endian_read_16(packet, 19); 5963 // track outgoing connection 5964 hci_stack->outgoing_addr_type = BD_ADDR_TYPE_SCO; 5965 reverse_bd_addr(&packet[3], hci_stack->outgoing_addr); 5966 break; 5967 #endif 5968 #endif 5969 5970 #ifdef ENABLE_BLE 5971 #ifdef ENABLE_LE_CENTRAL 5972 case HCI_OPCODE_HCI_LE_CREATE_CONNECTION: 5973 // white list used? 5974 initiator_filter_policy = packet[7]; 5975 switch (initiator_filter_policy) { 5976 case 0: 5977 // whitelist not used 5978 hci_stack->le_connecting_state = LE_CONNECTING_DIRECT; 5979 break; 5980 case 1: 5981 hci_stack->le_connecting_state = LE_CONNECTING_WHITELIST; 5982 break; 5983 default: 5984 log_error("Invalid initiator_filter_policy in LE Create Connection %u", initiator_filter_policy); 5985 break; 5986 } 5987 // track outgoing connection 5988 hci_stack->outgoing_addr_type = (bd_addr_type_t) packet[8]; // peer addres type 5989 reverse_bd_addr( &packet[9], hci_stack->outgoing_addr); // peer address 5990 break; 5991 case HCI_OPCODE_HCI_LE_CREATE_CONNECTION_CANCEL: 5992 hci_stack->le_connecting_state = LE_CONNECTING_CANCEL; 5993 break; 5994 #endif 5995 #endif 5996 default: 5997 break; 5998 } 5999 6000 hci_stack->num_cmd_packets--; 6001 6002 hci_dump_packet(HCI_COMMAND_DATA_PACKET, 0, packet, size); 6003 int err = hci_stack->hci_transport->send_packet(HCI_COMMAND_DATA_PACKET, packet, size); 6004 if (err != 0){ 6005 return ERROR_CODE_HARDWARE_FAILURE; 6006 } 6007 return ERROR_CODE_SUCCESS; 6008 } 6009 6010 // disconnect because of security block 6011 void hci_disconnect_security_block(hci_con_handle_t con_handle){ 6012 hci_connection_t * connection = hci_connection_for_handle(con_handle); 6013 if (!connection) return; 6014 connection->bonding_flags |= BONDING_DISCONNECT_SECURITY_BLOCK; 6015 } 6016 6017 6018 // Configure Secure Simple Pairing 6019 6020 #ifdef ENABLE_CLASSIC 6021 6022 // enable will enable SSP during init 6023 void gap_ssp_set_enable(int enable){ 6024 hci_stack->ssp_enable = enable; 6025 } 6026 6027 static int hci_local_ssp_activated(void){ 6028 return gap_ssp_supported() && hci_stack->ssp_enable; 6029 } 6030 6031 // if set, BTstack will respond to io capability request using authentication requirement 6032 void gap_ssp_set_io_capability(int io_capability){ 6033 hci_stack->ssp_io_capability = io_capability; 6034 } 6035 void gap_ssp_set_authentication_requirement(int authentication_requirement){ 6036 hci_stack->ssp_authentication_requirement = authentication_requirement; 6037 } 6038 6039 // if set, BTstack will confirm a numberic comparion and enter '000000' if requested 6040 void gap_ssp_set_auto_accept(int auto_accept){ 6041 hci_stack->ssp_auto_accept = auto_accept; 6042 } 6043 6044 void gap_secure_connections_enable(bool enable){ 6045 hci_stack->secure_connections_enable = enable; 6046 } 6047 bool gap_secure_connections_active(void){ 6048 return hci_stack->secure_connections_active; 6049 } 6050 6051 #endif 6052 6053 // va_list part of hci_send_cmd 6054 uint8_t hci_send_cmd_va_arg(const hci_cmd_t * cmd, va_list argptr){ 6055 if (!hci_can_send_command_packet_now()){ 6056 log_error("hci_send_cmd called but cannot send packet now"); 6057 return ERROR_CODE_COMMAND_DISALLOWED; 6058 } 6059 6060 // for HCI INITIALIZATION 6061 // log_info("hci_send_cmd: opcode %04x", cmd->opcode); 6062 hci_stack->last_cmd_opcode = cmd->opcode; 6063 6064 hci_reserve_packet_buffer(); 6065 uint8_t * packet = hci_stack->hci_packet_buffer; 6066 uint16_t size = hci_cmd_create_from_template(packet, cmd, argptr); 6067 uint8_t status = hci_send_cmd_packet(packet, size); 6068 6069 // release packet buffer on error or for synchronous transport implementations 6070 if ((status != ERROR_CODE_SUCCESS) || hci_transport_synchronous()){ 6071 hci_release_packet_buffer(); 6072 hci_emit_transport_packet_sent(); 6073 } 6074 6075 return status; 6076 } 6077 6078 /** 6079 * pre: numcmds >= 0 - it's allowed to send a command to the controller 6080 */ 6081 uint8_t hci_send_cmd(const hci_cmd_t * cmd, ...){ 6082 va_list argptr; 6083 va_start(argptr, cmd); 6084 uint8_t status = hci_send_cmd_va_arg(cmd, argptr); 6085 va_end(argptr); 6086 return status; 6087 } 6088 6089 // Create various non-HCI events. 6090 // TODO: generalize, use table similar to hci_create_command 6091 6092 static void hci_emit_event(uint8_t * event, uint16_t size, int dump){ 6093 // dump packet 6094 if (dump) { 6095 hci_dump_packet( HCI_EVENT_PACKET, 0, event, size); 6096 } 6097 6098 // dispatch to all event handlers 6099 btstack_linked_list_iterator_t it; 6100 btstack_linked_list_iterator_init(&it, &hci_stack->event_handlers); 6101 while (btstack_linked_list_iterator_has_next(&it)){ 6102 btstack_packet_callback_registration_t * entry = (btstack_packet_callback_registration_t*) btstack_linked_list_iterator_next(&it); 6103 entry->callback(HCI_EVENT_PACKET, 0, event, size); 6104 } 6105 } 6106 6107 static void hci_emit_acl_packet(uint8_t * packet, uint16_t size){ 6108 if (!hci_stack->acl_packet_handler) return; 6109 hci_stack->acl_packet_handler(HCI_ACL_DATA_PACKET, 0, packet, size); 6110 } 6111 6112 #ifdef ENABLE_CLASSIC 6113 static void hci_notify_if_sco_can_send_now(void){ 6114 // notify SCO sender if waiting 6115 if (!hci_stack->sco_waiting_for_can_send_now) return; 6116 if (hci_can_send_sco_packet_now()){ 6117 hci_stack->sco_waiting_for_can_send_now = 0; 6118 uint8_t event[2] = { HCI_EVENT_SCO_CAN_SEND_NOW, 0 }; 6119 hci_dump_packet(HCI_EVENT_PACKET, 1, event, sizeof(event)); 6120 hci_stack->sco_packet_handler(HCI_EVENT_PACKET, 0, event, sizeof(event)); 6121 } 6122 } 6123 6124 // parsing end emitting has been merged to reduce code size 6125 static void gap_inquiry_explode(uint8_t *packet, uint16_t size) { 6126 uint8_t event[28+GAP_INQUIRY_MAX_NAME_LEN]; 6127 6128 uint8_t * eir_data; 6129 ad_context_t context; 6130 const uint8_t * name; 6131 uint8_t name_len; 6132 6133 if (size < 3) return; 6134 6135 int event_type = hci_event_packet_get_type(packet); 6136 int num_reserved_fields = (event_type == HCI_EVENT_INQUIRY_RESULT) ? 2 : 1; // 2 for old event, 1 otherwise 6137 int num_responses = hci_event_inquiry_result_get_num_responses(packet); 6138 6139 switch (event_type){ 6140 case HCI_EVENT_INQUIRY_RESULT: 6141 case HCI_EVENT_INQUIRY_RESULT_WITH_RSSI: 6142 if (size != (3 + (num_responses * 14))) return; 6143 break; 6144 case HCI_EVENT_EXTENDED_INQUIRY_RESPONSE: 6145 if (size != 257) return; 6146 if (num_responses != 1) return; 6147 break; 6148 default: 6149 return; 6150 } 6151 6152 // event[1] is set at the end 6153 int i; 6154 for (i=0; i<num_responses;i++){ 6155 memset(event, 0, sizeof(event)); 6156 event[0] = GAP_EVENT_INQUIRY_RESULT; 6157 uint8_t event_size = 27; // if name is not set by EIR 6158 6159 (void)memcpy(&event[2], &packet[3 + (i * 6)], 6); // bd_addr 6160 event[8] = packet[3 + (num_responses*(6)) + (i*1)]; // page_scan_repetition_mode 6161 (void)memcpy(&event[9], 6162 &packet[3 + (num_responses * (6 + 1 + num_reserved_fields)) + (i * 3)], 6163 3); // class of device 6164 (void)memcpy(&event[12], 6165 &packet[3 + (num_responses * (6 + 1 + num_reserved_fields + 3)) + (i * 2)], 6166 2); // clock offset 6167 6168 switch (event_type){ 6169 case HCI_EVENT_INQUIRY_RESULT: 6170 // 14,15,16,17 = 0, size 18 6171 break; 6172 case HCI_EVENT_INQUIRY_RESULT_WITH_RSSI: 6173 event[14] = 1; 6174 event[15] = packet [3 + (num_responses*(6+1+num_reserved_fields+3+2)) + (i*1)]; // rssi 6175 // 16,17 = 0, size 18 6176 break; 6177 case HCI_EVENT_EXTENDED_INQUIRY_RESPONSE: 6178 event[14] = 1; 6179 event[15] = packet [3 + (num_responses*(6+1+num_reserved_fields+3+2)) + (i*1)]; // rssi 6180 // EIR packets only contain a single inquiry response 6181 eir_data = &packet[3 + (6+1+num_reserved_fields+3+2+1)]; 6182 name = NULL; 6183 // Iterate over EIR data 6184 for (ad_iterator_init(&context, EXTENDED_INQUIRY_RESPONSE_DATA_LEN, eir_data) ; ad_iterator_has_more(&context) ; ad_iterator_next(&context)){ 6185 uint8_t data_type = ad_iterator_get_data_type(&context); 6186 uint8_t data_size = ad_iterator_get_data_len(&context); 6187 const uint8_t * data = ad_iterator_get_data(&context); 6188 // Prefer Complete Local Name over Shortened Local Name 6189 switch (data_type){ 6190 case BLUETOOTH_DATA_TYPE_SHORTENED_LOCAL_NAME: 6191 if (name) continue; 6192 /* fall through */ 6193 case BLUETOOTH_DATA_TYPE_COMPLETE_LOCAL_NAME: 6194 name = data; 6195 name_len = data_size; 6196 break; 6197 case BLUETOOTH_DATA_TYPE_DEVICE_ID: 6198 if (data_size != 8) break; 6199 event[16] = 1; 6200 memcpy(&event[17], data, 8); 6201 break; 6202 default: 6203 break; 6204 } 6205 } 6206 if (name){ 6207 event[25] = 1; 6208 // truncate name if needed 6209 int len = btstack_min(name_len, GAP_INQUIRY_MAX_NAME_LEN); 6210 event[26] = len; 6211 (void)memcpy(&event[27], name, len); 6212 event_size += len; 6213 } 6214 break; 6215 default: 6216 return; 6217 } 6218 event[1] = event_size - 2; 6219 hci_emit_event(event, event_size, 1); 6220 } 6221 } 6222 #endif 6223 6224 void hci_emit_state(void){ 6225 log_info("BTSTACK_EVENT_STATE %u", hci_stack->state); 6226 uint8_t event[3]; 6227 event[0] = BTSTACK_EVENT_STATE; 6228 event[1] = sizeof(event) - 2u; 6229 event[2] = hci_stack->state; 6230 hci_emit_event(event, sizeof(event), 1); 6231 } 6232 6233 #ifdef ENABLE_CLASSIC 6234 static void hci_emit_connection_complete(bd_addr_t address, hci_con_handle_t con_handle, uint8_t status){ 6235 uint8_t event[13]; 6236 event[0] = HCI_EVENT_CONNECTION_COMPLETE; 6237 event[1] = sizeof(event) - 2; 6238 event[2] = status; 6239 little_endian_store_16(event, 3, con_handle); 6240 reverse_bd_addr(address, &event[5]); 6241 event[11] = 1; // ACL connection 6242 event[12] = 0; // encryption disabled 6243 hci_emit_event(event, sizeof(event), 1); 6244 } 6245 static void hci_emit_l2cap_check_timeout(hci_connection_t *conn){ 6246 if (disable_l2cap_timeouts) return; 6247 log_info("L2CAP_EVENT_TIMEOUT_CHECK"); 6248 uint8_t event[4]; 6249 event[0] = L2CAP_EVENT_TIMEOUT_CHECK; 6250 event[1] = sizeof(event) - 2; 6251 little_endian_store_16(event, 2, conn->con_handle); 6252 hci_emit_event(event, sizeof(event), 1); 6253 } 6254 #endif 6255 6256 #ifdef ENABLE_BLE 6257 #ifdef ENABLE_LE_CENTRAL 6258 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){ 6259 uint8_t event[21]; 6260 event[0] = HCI_EVENT_LE_META; 6261 event[1] = sizeof(event) - 2u; 6262 event[2] = HCI_SUBEVENT_LE_CONNECTION_COMPLETE; 6263 event[3] = status; 6264 little_endian_store_16(event, 4, con_handle); 6265 event[6] = 0; // TODO: role 6266 event[7] = address_type; 6267 reverse_bd_addr(address, &event[8]); 6268 little_endian_store_16(event, 14, 0); // interval 6269 little_endian_store_16(event, 16, 0); // latency 6270 little_endian_store_16(event, 18, 0); // supervision timeout 6271 event[20] = 0; // master clock accuracy 6272 hci_emit_event(event, sizeof(event), 1); 6273 } 6274 #endif 6275 #endif 6276 6277 static void hci_emit_transport_packet_sent(void){ 6278 // notify upper stack that it might be possible to send again 6279 uint8_t event[] = { HCI_EVENT_TRANSPORT_PACKET_SENT, 0}; 6280 hci_emit_event(&event[0], sizeof(event), 0); // don't dump 6281 } 6282 6283 static void hci_emit_disconnection_complete(hci_con_handle_t con_handle, uint8_t reason){ 6284 uint8_t event[6]; 6285 event[0] = HCI_EVENT_DISCONNECTION_COMPLETE; 6286 event[1] = sizeof(event) - 2u; 6287 event[2] = 0; // status = OK 6288 little_endian_store_16(event, 3, con_handle); 6289 event[5] = reason; 6290 hci_emit_event(event, sizeof(event), 1); 6291 } 6292 6293 static void hci_emit_nr_connections_changed(void){ 6294 log_info("BTSTACK_EVENT_NR_CONNECTIONS_CHANGED %u", nr_hci_connections()); 6295 uint8_t event[3]; 6296 event[0] = BTSTACK_EVENT_NR_CONNECTIONS_CHANGED; 6297 event[1] = sizeof(event) - 2u; 6298 event[2] = nr_hci_connections(); 6299 hci_emit_event(event, sizeof(event), 1); 6300 } 6301 6302 static void hci_emit_hci_open_failed(void){ 6303 log_info("BTSTACK_EVENT_POWERON_FAILED"); 6304 uint8_t event[2]; 6305 event[0] = BTSTACK_EVENT_POWERON_FAILED; 6306 event[1] = sizeof(event) - 2u; 6307 hci_emit_event(event, sizeof(event), 1); 6308 } 6309 6310 static void hci_emit_dedicated_bonding_result(bd_addr_t address, uint8_t status){ 6311 log_info("hci_emit_dedicated_bonding_result %u ", status); 6312 uint8_t event[9]; 6313 int pos = 0; 6314 event[pos++] = GAP_EVENT_DEDICATED_BONDING_COMPLETED; 6315 event[pos++] = sizeof(event) - 2u; 6316 event[pos++] = status; 6317 reverse_bd_addr(address, &event[pos]); 6318 hci_emit_event(event, sizeof(event), 1); 6319 } 6320 6321 6322 #ifdef ENABLE_CLASSIC 6323 6324 static void hci_emit_security_level(hci_con_handle_t con_handle, gap_security_level_t level){ 6325 log_info("hci_emit_security_level %u for handle %x", level, con_handle); 6326 uint8_t event[5]; 6327 int pos = 0; 6328 event[pos++] = GAP_EVENT_SECURITY_LEVEL; 6329 event[pos++] = sizeof(event) - 2; 6330 little_endian_store_16(event, 2, con_handle); 6331 pos += 2; 6332 event[pos++] = level; 6333 hci_emit_event(event, sizeof(event), 1); 6334 } 6335 6336 static gap_security_level_t gap_security_level_for_connection(hci_connection_t * connection){ 6337 if (!connection) return LEVEL_0; 6338 if ((connection->authentication_flags & AUTH_FLAG_CONNECTION_ENCRYPTED) == 0) return LEVEL_0; 6339 // BIAS: we only consider Authenticated if the connection is already encrypted, which requires that both sides have link key 6340 if ((connection->authentication_flags & AUTH_FLAG_CONNECTION_AUTHENTICATED) == 0) return LEVEL_0; 6341 if (connection->encryption_key_size < hci_stack->gap_required_encyrption_key_size) return LEVEL_0; 6342 gap_security_level_t security_level = gap_security_level_for_link_key_type(connection->link_key_type); 6343 // LEVEL 4 always requires 128 bit encrytion key size 6344 if ((security_level == LEVEL_4) && (connection->encryption_key_size < 16)){ 6345 security_level = LEVEL_3; 6346 } 6347 return security_level; 6348 } 6349 6350 static void hci_emit_discoverable_enabled(uint8_t enabled){ 6351 log_info("BTSTACK_EVENT_DISCOVERABLE_ENABLED %u", enabled); 6352 uint8_t event[3]; 6353 event[0] = BTSTACK_EVENT_DISCOVERABLE_ENABLED; 6354 event[1] = sizeof(event) - 2; 6355 event[2] = enabled; 6356 hci_emit_event(event, sizeof(event), 1); 6357 } 6358 6359 // query if remote side supports eSCO 6360 bool hci_remote_esco_supported(hci_con_handle_t con_handle){ 6361 hci_connection_t * connection = hci_connection_for_handle(con_handle); 6362 if (!connection) return false; 6363 return (connection->remote_supported_features[0] & 1) != 0; 6364 } 6365 6366 static bool hci_ssp_supported(hci_connection_t * connection){ 6367 const uint8_t mask = BONDING_REMOTE_SUPPORTS_SSP_CONTROLLER | BONDING_REMOTE_SUPPORTS_SSP_HOST; 6368 return (connection->bonding_flags & mask) == mask; 6369 } 6370 6371 // query if remote side supports SSP 6372 bool hci_remote_ssp_supported(hci_con_handle_t con_handle){ 6373 hci_connection_t * connection = hci_connection_for_handle(con_handle); 6374 if (!connection) return false; 6375 return hci_ssp_supported(connection) ? 1 : 0; 6376 } 6377 6378 bool gap_ssp_supported_on_both_sides(hci_con_handle_t handle){ 6379 return hci_local_ssp_activated() && hci_remote_ssp_supported(handle); 6380 } 6381 6382 /** 6383 * Check if remote supported features query has completed 6384 */ 6385 bool hci_remote_features_available(hci_con_handle_t handle){ 6386 hci_connection_t * connection = hci_connection_for_handle(handle); 6387 if (!connection) return false; 6388 return (connection->bonding_flags & BONDING_RECEIVED_REMOTE_FEATURES) != 0; 6389 } 6390 6391 /** 6392 * Trigger remote supported features query 6393 */ 6394 6395 static void hci_trigger_remote_features_for_connection(hci_connection_t * connection){ 6396 if ((connection->bonding_flags & (BONDING_REMOTE_FEATURES_QUERY_ACTIVE | BONDING_RECEIVED_REMOTE_FEATURES)) == 0){ 6397 connection->bonding_flags |= BONDING_REMOTE_FEATURES_QUERY_ACTIVE | BONDING_REQUEST_REMOTE_FEATURES_PAGE_0; 6398 } 6399 } 6400 6401 void hci_remote_features_query(hci_con_handle_t con_handle){ 6402 hci_connection_t * connection = hci_connection_for_handle(con_handle); 6403 if (!connection) return; 6404 hci_trigger_remote_features_for_connection(connection); 6405 hci_run(); 6406 } 6407 6408 // GAP API 6409 /** 6410 * @bbrief enable/disable bonding. default is enabled 6411 * @praram enabled 6412 */ 6413 void gap_set_bondable_mode(int enable){ 6414 hci_stack->bondable = enable ? 1 : 0; 6415 } 6416 /** 6417 * @brief Get bondable mode. 6418 * @return 1 if bondable 6419 */ 6420 int gap_get_bondable_mode(void){ 6421 return hci_stack->bondable; 6422 } 6423 6424 /** 6425 * @brief map link keys to security levels 6426 */ 6427 gap_security_level_t gap_security_level_for_link_key_type(link_key_type_t link_key_type){ 6428 switch (link_key_type){ 6429 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P256: 6430 return LEVEL_4; 6431 case COMBINATION_KEY: 6432 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P192: 6433 return LEVEL_3; 6434 default: 6435 return LEVEL_2; 6436 } 6437 } 6438 6439 /** 6440 * @brief map link keys to secure connection yes/no 6441 */ 6442 bool gap_secure_connection_for_link_key_type(link_key_type_t link_key_type){ 6443 switch (link_key_type){ 6444 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P256: 6445 case UNAUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P256: 6446 return true; 6447 default: 6448 return false; 6449 } 6450 } 6451 6452 /** 6453 * @brief map link keys to authenticated 6454 */ 6455 bool gap_authenticated_for_link_key_type(link_key_type_t link_key_type){ 6456 switch (link_key_type){ 6457 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P256: 6458 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P192: 6459 return true; 6460 default: 6461 return false; 6462 } 6463 } 6464 6465 bool gap_mitm_protection_required_for_security_level(gap_security_level_t level){ 6466 log_info("gap_mitm_protection_required_for_security_level %u", level); 6467 return level > LEVEL_2; 6468 } 6469 6470 /** 6471 * @brief get current security level 6472 */ 6473 gap_security_level_t gap_security_level(hci_con_handle_t con_handle){ 6474 hci_connection_t * connection = hci_connection_for_handle(con_handle); 6475 if (!connection) return LEVEL_0; 6476 return gap_security_level_for_connection(connection); 6477 } 6478 6479 /** 6480 * @brief request connection to device to 6481 * @result GAP_AUTHENTICATION_RESULT 6482 */ 6483 void gap_request_security_level(hci_con_handle_t con_handle, gap_security_level_t requested_level){ 6484 hci_connection_t * connection = hci_connection_for_handle(con_handle); 6485 if (!connection){ 6486 hci_emit_security_level(con_handle, LEVEL_0); 6487 return; 6488 } 6489 6490 btstack_assert(hci_is_le_connection(connection) == false); 6491 6492 // 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) 6493 // available on the BR/EDR physical transport require Security Mode 4, Level 4 " 6494 if (hci_stack->gap_secure_connections_only_mode && (requested_level != LEVEL_0)){ 6495 requested_level = LEVEL_4; 6496 } 6497 6498 gap_security_level_t current_level = gap_security_level(con_handle); 6499 log_info("gap_request_security_level requested level %u, planned level %u, current level %u", 6500 requested_level, connection->requested_security_level, current_level); 6501 6502 // authentication active if authentication request was sent or planned level > 0 6503 bool authentication_active = ((connection->bonding_flags & BONDING_SENT_AUTHENTICATE_REQUEST) != 0) || (connection->requested_security_level > LEVEL_0); 6504 if (authentication_active){ 6505 // authentication already active 6506 if (connection->requested_security_level < requested_level){ 6507 // increase requested level as new level is higher 6508 // TODO: handle re-authentication when done 6509 connection->requested_security_level = requested_level; 6510 } 6511 } else { 6512 // no request active, notify if security sufficient 6513 if (requested_level <= current_level){ 6514 hci_emit_security_level(con_handle, current_level); 6515 return; 6516 } 6517 6518 // store request 6519 connection->requested_security_level = requested_level; 6520 6521 // request remote features if not already active 6522 hci_remote_features_query(con_handle); 6523 6524 // start to authenticate connection 6525 connection->bonding_flags |= BONDING_SEND_AUTHENTICATE_REQUEST; 6526 hci_run(); 6527 } 6528 } 6529 6530 /** 6531 * @brief start dedicated bonding with device. disconnect after bonding 6532 * @param device 6533 * @param request MITM protection 6534 * @result GAP_DEDICATED_BONDING_COMPLETE 6535 */ 6536 int gap_dedicated_bonding(bd_addr_t device, int mitm_protection_required){ 6537 6538 // create connection state machine 6539 hci_connection_t * connection = create_connection_for_bd_addr_and_type(device, BD_ADDR_TYPE_ACL); 6540 6541 if (!connection){ 6542 return BTSTACK_MEMORY_ALLOC_FAILED; 6543 } 6544 6545 // delete linkn key 6546 gap_drop_link_key_for_bd_addr(device); 6547 6548 // configure LEVEL_2/3, dedicated bonding 6549 connection->state = SEND_CREATE_CONNECTION; 6550 connection->requested_security_level = mitm_protection_required ? LEVEL_3 : LEVEL_2; 6551 log_info("gap_dedicated_bonding, mitm %d -> level %u", mitm_protection_required, connection->requested_security_level); 6552 connection->bonding_flags = BONDING_DEDICATED; 6553 6554 // wait for GAP Security Result and send GAP Dedicated Bonding complete 6555 6556 // handle: connnection failure (connection complete != ok) 6557 // handle: authentication failure 6558 // handle: disconnect on done 6559 6560 hci_run(); 6561 6562 return 0; 6563 } 6564 6565 void gap_set_local_name(const char * local_name){ 6566 hci_stack->local_name = local_name; 6567 hci_stack->gap_tasks_classic |= GAP_TASK_SET_LOCAL_NAME; 6568 // also update EIR if not set by user 6569 if (hci_stack->eir_data == NULL){ 6570 hci_stack->gap_tasks_classic |= GAP_TASK_SET_EIR_DATA; 6571 } 6572 hci_run(); 6573 } 6574 #endif 6575 6576 6577 #ifdef ENABLE_BLE 6578 6579 #ifdef ENABLE_LE_CENTRAL 6580 void gap_start_scan(void){ 6581 hci_stack->le_scanning_enabled = true; 6582 hci_run(); 6583 } 6584 6585 void gap_stop_scan(void){ 6586 hci_stack->le_scanning_enabled = false; 6587 hci_run(); 6588 } 6589 6590 void gap_set_scan_params(uint8_t scan_type, uint16_t scan_interval, uint16_t scan_window, uint8_t scanning_filter_policy){ 6591 hci_stack->le_scan_type = scan_type; 6592 hci_stack->le_scan_filter_policy = scanning_filter_policy; 6593 hci_stack->le_scan_interval = scan_interval; 6594 hci_stack->le_scan_window = scan_window; 6595 hci_stack->le_scanning_param_update = true; 6596 hci_run(); 6597 } 6598 6599 void gap_set_scan_parameters(uint8_t scan_type, uint16_t scan_interval, uint16_t scan_window){ 6600 gap_set_scan_params(scan_type, scan_interval, scan_window, 0); 6601 } 6602 6603 uint8_t gap_connect(const bd_addr_t addr, bd_addr_type_t addr_type){ 6604 hci_connection_t * conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 6605 if (!conn){ 6606 // disallow if le connection is already outgoing 6607 if (hci_is_le_connection_type(addr_type) && hci_stack->le_connecting_request != LE_CONNECTING_IDLE){ 6608 log_error("le connection already active"); 6609 return ERROR_CODE_COMMAND_DISALLOWED; 6610 } 6611 6612 log_info("gap_connect: no connection exists yet, creating context"); 6613 conn = create_connection_for_bd_addr_and_type(addr, addr_type); 6614 if (!conn){ 6615 // notify client that alloc failed 6616 hci_emit_le_connection_complete(addr_type, addr, 0, BTSTACK_MEMORY_ALLOC_FAILED); 6617 log_info("gap_connect: failed to alloc hci_connection_t"); 6618 return GATT_CLIENT_NOT_CONNECTED; // don't sent packet to controller 6619 } 6620 6621 // set le connecting state 6622 if (hci_is_le_connection_type(addr_type)){ 6623 hci_stack->le_connecting_request = LE_CONNECTING_DIRECT; 6624 } 6625 6626 conn->state = SEND_CREATE_CONNECTION; 6627 log_info("gap_connect: send create connection next"); 6628 hci_run(); 6629 return ERROR_CODE_SUCCESS; 6630 } 6631 6632 if (!hci_is_le_connection(conn) || 6633 (conn->state == SEND_CREATE_CONNECTION) || 6634 (conn->state == SENT_CREATE_CONNECTION)) { 6635 hci_emit_le_connection_complete(conn->address_type, conn->address, 0, ERROR_CODE_COMMAND_DISALLOWED); 6636 log_error("gap_connect: classic connection or connect is already being created"); 6637 return GATT_CLIENT_IN_WRONG_STATE; 6638 } 6639 6640 // check if connection was just disconnected 6641 if (conn->state == RECEIVED_DISCONNECTION_COMPLETE){ 6642 log_info("gap_connect: send create connection (again)"); 6643 conn->state = SEND_CREATE_CONNECTION; 6644 hci_run(); 6645 return ERROR_CODE_SUCCESS; 6646 } 6647 6648 log_info("gap_connect: context exists with state %u", conn->state); 6649 hci_emit_le_connection_complete(conn->address_type, conn->address, conn->con_handle, ERROR_CODE_SUCCESS); 6650 hci_run(); 6651 return ERROR_CODE_SUCCESS; 6652 } 6653 6654 // @assumption: only a single outgoing LE Connection exists 6655 static hci_connection_t * gap_get_outgoing_connection(void){ 6656 btstack_linked_item_t *it; 6657 for (it = (btstack_linked_item_t *) hci_stack->connections; it != NULL; it = it->next){ 6658 hci_connection_t * conn = (hci_connection_t *) it; 6659 if (!hci_is_le_connection(conn)) continue; 6660 switch (conn->state){ 6661 case SEND_CREATE_CONNECTION: 6662 case SENT_CREATE_CONNECTION: 6663 case SENT_CANCEL_CONNECTION: 6664 return conn; 6665 default: 6666 break; 6667 }; 6668 } 6669 return NULL; 6670 } 6671 6672 uint8_t gap_connect_cancel(void){ 6673 hci_connection_t * conn = gap_get_outgoing_connection(); 6674 if (!conn) return 0; 6675 switch (conn->state){ 6676 case SEND_CREATE_CONNECTION: 6677 // skip sending create connection and emit event instead 6678 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 6679 hci_emit_le_connection_complete(conn->address_type, conn->address, 0, ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER); 6680 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 6681 btstack_memory_hci_connection_free( conn ); 6682 break; 6683 case SENT_CREATE_CONNECTION: 6684 // request to send cancel connection 6685 conn->state = SEND_CANCEL_CONNECTION; 6686 hci_run(); 6687 break; 6688 default: 6689 break; 6690 } 6691 return 0; 6692 } 6693 6694 /** 6695 * @brief Set connection parameters for outgoing connections 6696 * @param conn_scan_interval (unit: 0.625 msec), default: 60 ms 6697 * @param conn_scan_window (unit: 0.625 msec), default: 30 ms 6698 * @param conn_interval_min (unit: 1.25ms), default: 10 ms 6699 * @param conn_interval_max (unit: 1.25ms), default: 30 ms 6700 * @param conn_latency, default: 4 6701 * @param supervision_timeout (unit: 10ms), default: 720 ms 6702 * @param min_ce_length (unit: 0.625ms), default: 10 ms 6703 * @param max_ce_length (unit: 0.625ms), default: 30 ms 6704 */ 6705 6706 void gap_set_connection_parameters(uint16_t conn_scan_interval, uint16_t conn_scan_window, 6707 uint16_t conn_interval_min, uint16_t conn_interval_max, uint16_t conn_latency, 6708 uint16_t supervision_timeout, uint16_t min_ce_length, uint16_t max_ce_length){ 6709 hci_stack->le_connection_scan_interval = conn_scan_interval; 6710 hci_stack->le_connection_scan_window = conn_scan_window; 6711 hci_stack->le_connection_interval_min = conn_interval_min; 6712 hci_stack->le_connection_interval_max = conn_interval_max; 6713 hci_stack->le_connection_latency = conn_latency; 6714 hci_stack->le_supervision_timeout = supervision_timeout; 6715 hci_stack->le_minimum_ce_length = min_ce_length; 6716 hci_stack->le_maximum_ce_length = max_ce_length; 6717 } 6718 #endif 6719 6720 /** 6721 * @brief Updates the connection parameters for a given LE connection 6722 * @param handle 6723 * @param conn_interval_min (unit: 1.25ms) 6724 * @param conn_interval_max (unit: 1.25ms) 6725 * @param conn_latency 6726 * @param supervision_timeout (unit: 10ms) 6727 * @return 0 if ok 6728 */ 6729 int gap_update_connection_parameters(hci_con_handle_t con_handle, uint16_t conn_interval_min, 6730 uint16_t conn_interval_max, uint16_t conn_latency, uint16_t supervision_timeout){ 6731 hci_connection_t * connection = hci_connection_for_handle(con_handle); 6732 if (!connection) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 6733 connection->le_conn_interval_min = conn_interval_min; 6734 connection->le_conn_interval_max = conn_interval_max; 6735 connection->le_conn_latency = conn_latency; 6736 connection->le_supervision_timeout = supervision_timeout; 6737 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_CHANGE_HCI_CON_PARAMETERS; 6738 hci_run(); 6739 return 0; 6740 } 6741 6742 /** 6743 * @brief Request an update of the connection parameter for a given LE connection 6744 * @param handle 6745 * @param conn_interval_min (unit: 1.25ms) 6746 * @param conn_interval_max (unit: 1.25ms) 6747 * @param conn_latency 6748 * @param supervision_timeout (unit: 10ms) 6749 * @return 0 if ok 6750 */ 6751 int gap_request_connection_parameter_update(hci_con_handle_t con_handle, uint16_t conn_interval_min, 6752 uint16_t conn_interval_max, uint16_t conn_latency, uint16_t supervision_timeout){ 6753 hci_connection_t * connection = hci_connection_for_handle(con_handle); 6754 if (!connection) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 6755 connection->le_conn_interval_min = conn_interval_min; 6756 connection->le_conn_interval_max = conn_interval_max; 6757 connection->le_conn_latency = conn_latency; 6758 connection->le_supervision_timeout = supervision_timeout; 6759 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_SEND_REQUEST; 6760 uint8_t l2cap_trigger_run_event[2] = { L2CAP_EVENT_TRIGGER_RUN, 0}; 6761 hci_emit_event(l2cap_trigger_run_event, sizeof(l2cap_trigger_run_event), 0); 6762 return 0; 6763 } 6764 6765 #ifdef ENABLE_LE_PERIPHERAL 6766 6767 /** 6768 * @brief Set Advertisement Data 6769 * @param advertising_data_length 6770 * @param advertising_data (max 31 octets) 6771 * @note data is not copied, pointer has to stay valid 6772 */ 6773 void gap_advertisements_set_data(uint8_t advertising_data_length, uint8_t * advertising_data){ 6774 hci_stack->le_advertisements_data_len = advertising_data_length; 6775 hci_stack->le_advertisements_data = advertising_data; 6776 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_ADV_DATA; 6777 hci_run(); 6778 } 6779 6780 /** 6781 * @brief Set Scan Response Data 6782 * @param advertising_data_length 6783 * @param advertising_data (max 31 octets) 6784 * @note data is not copied, pointer has to stay valid 6785 */ 6786 void gap_scan_response_set_data(uint8_t scan_response_data_length, uint8_t * scan_response_data){ 6787 hci_stack->le_scan_response_data_len = scan_response_data_length; 6788 hci_stack->le_scan_response_data = scan_response_data; 6789 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA; 6790 hci_run(); 6791 } 6792 6793 /** 6794 * @brief Set Advertisement Parameters 6795 * @param adv_int_min 6796 * @param adv_int_max 6797 * @param adv_type 6798 * @param direct_address_type 6799 * @param direct_address 6800 * @param channel_map 6801 * @param filter_policy 6802 * 6803 * @note internal use. use gap_advertisements_set_params from gap_le.h instead. 6804 */ 6805 void hci_le_advertisements_set_params(uint16_t adv_int_min, uint16_t adv_int_max, uint8_t adv_type, 6806 uint8_t direct_address_typ, bd_addr_t direct_address, 6807 uint8_t channel_map, uint8_t filter_policy) { 6808 6809 hci_stack->le_advertisements_interval_min = adv_int_min; 6810 hci_stack->le_advertisements_interval_max = adv_int_max; 6811 hci_stack->le_advertisements_type = adv_type; 6812 hci_stack->le_advertisements_direct_address_type = direct_address_typ; 6813 hci_stack->le_advertisements_channel_map = channel_map; 6814 hci_stack->le_advertisements_filter_policy = filter_policy; 6815 (void)memcpy(hci_stack->le_advertisements_direct_address, direct_address, 6816 6); 6817 6818 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_PARAMS; 6819 hci_stack->le_advertisements_state |= LE_ADVERTISEMENT_STATE_PARAMS_SET; 6820 hci_run(); 6821 } 6822 6823 /** 6824 * @brief Enable/Disable Advertisements 6825 * @param enabled 6826 */ 6827 void gap_advertisements_enable(int enabled){ 6828 if (enabled == 0){ 6829 hci_stack->le_advertisements_state &= ~LE_ADVERTISEMENT_STATE_ENABLED; 6830 } else { 6831 hci_stack->le_advertisements_state |= LE_ADVERTISEMENT_STATE_ENABLED; 6832 } 6833 hci_update_advertisements_enabled_for_current_roles(); 6834 hci_run(); 6835 } 6836 6837 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 6838 static le_advertising_set_t * hci_advertising_set_for_handle(uint8_t advertising_handle){ 6839 btstack_linked_list_iterator_t it; 6840 btstack_linked_list_iterator_init(&it, &hci_stack->le_advertising_sets); 6841 while (btstack_linked_list_iterator_has_next(&it)){ 6842 le_advertising_set_t * item = (le_advertising_set_t *) btstack_linked_list_iterator_next(&it); 6843 if ( item->advertising_handle == advertising_handle ) { 6844 return item; 6845 } 6846 } 6847 return NULL; 6848 } 6849 6850 uint8_t gap_extended_advertising_setup(le_advertising_set_t * storage, const le_extended_advertising_parameters_t * advertising_parameters, uint8_t * out_advertising_handle){ 6851 // find free advertisement handle 6852 uint8_t advertisement_handle; 6853 for (advertisement_handle = 1; advertisement_handle <= LE_EXTENDED_ADVERTISING_MAX_HANDLE; advertisement_handle++){ 6854 if (hci_advertising_set_for_handle(advertisement_handle) == NULL) break; 6855 } 6856 if (advertisement_handle > LE_EXTENDED_ADVERTISING_MAX_HANDLE) return ERROR_CODE_MEMORY_CAPACITY_EXCEEDED; 6857 // clear 6858 memset(storage, 0, sizeof(le_advertising_set_t)); 6859 // copy params 6860 storage->advertising_handle = advertisement_handle; 6861 memcpy(&storage->extended_params, advertising_parameters, sizeof(le_extended_advertising_parameters_t)); 6862 // add to list 6863 bool add_ok = btstack_linked_list_add(&hci_stack->le_advertising_sets, (btstack_linked_item_t *) storage); 6864 if (!add_ok) return ERROR_CODE_ACL_CONNECTION_ALREADY_EXISTS; 6865 *out_advertising_handle = advertisement_handle; 6866 // set tasks and start 6867 storage->tasks = LE_ADVERTISEMENT_TASKS_SET_PARAMS; 6868 hci_run(); 6869 return ERROR_CODE_SUCCESS; 6870 } 6871 6872 uint8_t gap_extended_advertising_set_params(uint8_t advertising_handle, const le_extended_advertising_parameters_t * advertising_parameters){ 6873 le_advertising_set_t * advertising_set = hci_advertising_set_for_handle(advertising_handle); 6874 if (advertising_set == NULL) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 6875 memcpy(&advertising_set->extended_params, advertising_parameters, sizeof(le_extended_advertising_parameters_t)); 6876 // set tasks and start 6877 advertising_set->tasks |= LE_ADVERTISEMENT_TASKS_SET_PARAMS; 6878 hci_run(); 6879 return ERROR_CODE_SUCCESS; 6880 } 6881 6882 uint8_t gap_extended_advertising_get_params(uint8_t advertising_handle, le_extended_advertising_parameters_t * advertising_parameters){ 6883 le_advertising_set_t * advertising_set = hci_advertising_set_for_handle(advertising_handle); 6884 if (advertising_set == NULL) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 6885 memcpy(advertising_parameters, &advertising_set->extended_params, sizeof(le_extended_advertising_parameters_t)); 6886 return ERROR_CODE_SUCCESS; 6887 } 6888 6889 uint8_t gap_periodic_advertising_set_params(uint8_t advertising_handle, const le_periodic_advertising_parameters_t * advertising_parameters){ 6890 le_advertising_set_t * advertising_set = hci_advertising_set_for_handle(advertising_handle); 6891 if (advertising_set == NULL) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 6892 // periodic advertising requires neither connectable, scannable, legacy or anonymous 6893 if ((advertising_set->extended_params.advertising_event_properties & 0x1f) != 0) return ERROR_CODE_INVALID_HCI_COMMAND_PARAMETERS; 6894 memcpy(&advertising_set->periodic_params, advertising_parameters, sizeof(le_periodic_advertising_parameters_t)); 6895 // set tasks and start 6896 advertising_set->tasks |= LE_ADVERTISEMENT_TASKS_SET_PERIODIC_PARAMS; 6897 hci_run(); 6898 return ERROR_CODE_SUCCESS; 6899 } 6900 6901 uint8_t gap_periodic_advertising_get_params(uint8_t advertising_handle, le_periodic_advertising_parameters_t * advertising_parameters){ 6902 le_advertising_set_t * advertising_set = hci_advertising_set_for_handle(advertising_handle); 6903 if (advertising_set == NULL) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 6904 memcpy(advertising_parameters, &advertising_set->extended_params, sizeof(le_periodic_advertising_parameters_t)); 6905 return ERROR_CODE_SUCCESS; 6906 } 6907 6908 uint8_t gap_extended_advertising_set_random_address(uint8_t advertising_handle, bd_addr_t random_address){ 6909 le_advertising_set_t * advertising_set = hci_advertising_set_for_handle(advertising_handle); 6910 if (advertising_set == NULL) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 6911 memcpy(advertising_set->random_address, random_address, 6); 6912 // set tasks and start 6913 advertising_set->tasks |= LE_ADVERTISEMENT_TASKS_SET_ADDRESS; 6914 hci_run(); 6915 return ERROR_CODE_SUCCESS; 6916 } 6917 6918 uint8_t gap_extended_advertising_set_adv_data(uint8_t advertising_handle, uint16_t advertising_data_length, const uint8_t * advertising_data){ 6919 le_advertising_set_t * advertising_set = hci_advertising_set_for_handle(advertising_handle); 6920 if (advertising_set == NULL) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 6921 advertising_set->adv_data = advertising_data; 6922 advertising_set->adv_data_len = advertising_data_length; 6923 // set tasks and start 6924 advertising_set->tasks |= LE_ADVERTISEMENT_TASKS_SET_ADV_DATA; 6925 hci_run(); 6926 return ERROR_CODE_SUCCESS; 6927 } 6928 6929 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){ 6930 le_advertising_set_t * advertising_set = hci_advertising_set_for_handle(advertising_handle); 6931 if (advertising_set == NULL) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 6932 advertising_set->scan_data = scan_response_data; 6933 advertising_set->scan_data_len = scan_response_data_length; 6934 // set tasks and start 6935 advertising_set->tasks |= LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA; 6936 hci_run(); 6937 return ERROR_CODE_SUCCESS; 6938 } 6939 6940 uint8_t gap_periodic_advertising_set_data(uint8_t advertising_handle, uint16_t periodic_data_length, const uint8_t * periodic_data){ 6941 le_advertising_set_t * advertising_set = hci_advertising_set_for_handle(advertising_handle); 6942 if (advertising_set == NULL) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 6943 advertising_set->periodic_data = periodic_data; 6944 advertising_set->periodic_data_len = periodic_data_length; 6945 // set tasks and start 6946 advertising_set->tasks |= LE_ADVERTISEMENT_TASKS_SET_PERIODIC_DATA; 6947 hci_run(); 6948 return ERROR_CODE_SUCCESS; 6949 } 6950 6951 uint8_t gap_extended_advertising_start(uint8_t advertising_handle, uint16_t timeout, uint8_t num_extended_advertising_events){ 6952 le_advertising_set_t * advertising_set = hci_advertising_set_for_handle(advertising_handle); 6953 if (advertising_set == NULL) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 6954 advertising_set->enable_timeout = timeout; 6955 advertising_set->enable_max_scan_events = num_extended_advertising_events; 6956 // set tasks and start 6957 advertising_set->state |= LE_ADVERTISEMENT_STATE_ENABLED; 6958 hci_run(); 6959 return ERROR_CODE_SUCCESS; 6960 } 6961 6962 uint8_t gap_extended_advertising_stop(uint8_t advertising_handle){ 6963 le_advertising_set_t * advertising_set = hci_advertising_set_for_handle(advertising_handle); 6964 if (advertising_set == NULL) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 6965 // set tasks and start 6966 advertising_set->state &= ~LE_ADVERTISEMENT_STATE_ENABLED; 6967 hci_run(); 6968 return ERROR_CODE_SUCCESS; 6969 } 6970 6971 uint8_t gap_periodic_advertising_start(uint8_t advertising_handle, bool include_adi){ 6972 le_advertising_set_t * advertising_set = hci_advertising_set_for_handle(advertising_handle); 6973 if (advertising_set == NULL) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 6974 // set tasks and start 6975 advertising_set->periodic_include_adi = include_adi; 6976 advertising_set->state |= LE_ADVERTISEMENT_STATE_PERIODIC_ENABLED; 6977 hci_run(); 6978 return ERROR_CODE_SUCCESS; 6979 } 6980 6981 uint8_t gap_periodic_advertising_stop(uint8_t advertising_handle){ 6982 le_advertising_set_t * advertising_set = hci_advertising_set_for_handle(advertising_handle); 6983 if (advertising_set == NULL) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 6984 // set tasks and start 6985 advertising_set->state &= ~LE_ADVERTISEMENT_STATE_PERIODIC_ENABLED; 6986 hci_run(); 6987 return ERROR_CODE_SUCCESS; 6988 } 6989 6990 uint8_t gap_extended_advertising_remove(uint8_t advertising_handle){ 6991 le_advertising_set_t * advertising_set = hci_advertising_set_for_handle(advertising_handle); 6992 if (advertising_set == NULL) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 6993 // set tasks and start 6994 advertising_set->tasks |= LE_ADVERTISEMENT_TASKS_REMOVE_SET; 6995 hci_run(); 6996 return ERROR_CODE_SUCCESS; 6997 } 6998 #endif 6999 7000 #endif 7001 7002 void hci_le_set_own_address_type(uint8_t own_address_type){ 7003 log_info("hci_le_set_own_address_type: old %u, new %u", hci_stack->le_own_addr_type, own_address_type); 7004 if (own_address_type == hci_stack->le_own_addr_type) return; 7005 hci_stack->le_own_addr_type = own_address_type; 7006 7007 #ifdef ENABLE_LE_PERIPHERAL 7008 // update advertisement parameters, too 7009 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_PARAMS; 7010 hci_run(); 7011 #endif 7012 #ifdef ENABLE_LE_CENTRAL 7013 // note: we don't update scan parameters or modify ongoing connection attempts 7014 #endif 7015 } 7016 7017 void hci_le_random_address_set(const bd_addr_t random_address){ 7018 memcpy(hci_stack->le_random_address, random_address, 6); 7019 hci_stack->le_random_address_set = true; 7020 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_ADDRESS; 7021 hci_run(); 7022 } 7023 7024 #endif 7025 7026 uint8_t gap_disconnect(hci_con_handle_t handle){ 7027 hci_connection_t * conn = hci_connection_for_handle(handle); 7028 if (!conn){ 7029 hci_emit_disconnection_complete(handle, 0); 7030 return 0; 7031 } 7032 // ignore if already disconnected 7033 if (conn->state == RECEIVED_DISCONNECTION_COMPLETE){ 7034 return 0; 7035 } 7036 conn->state = SEND_DISCONNECT; 7037 hci_run(); 7038 return 0; 7039 } 7040 7041 int gap_read_rssi(hci_con_handle_t con_handle){ 7042 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 7043 if (hci_connection == NULL) return 0; 7044 hci_connection->gap_connection_tasks |= GAP_CONNECTION_TASK_READ_RSSI; 7045 hci_run(); 7046 return 1; 7047 } 7048 7049 /** 7050 * @brief Get connection type 7051 * @param con_handle 7052 * @result connection_type 7053 */ 7054 gap_connection_type_t gap_get_connection_type(hci_con_handle_t connection_handle){ 7055 hci_connection_t * conn = hci_connection_for_handle(connection_handle); 7056 if (!conn) return GAP_CONNECTION_INVALID; 7057 switch (conn->address_type){ 7058 case BD_ADDR_TYPE_LE_PUBLIC: 7059 case BD_ADDR_TYPE_LE_RANDOM: 7060 return GAP_CONNECTION_LE; 7061 case BD_ADDR_TYPE_SCO: 7062 return GAP_CONNECTION_SCO; 7063 case BD_ADDR_TYPE_ACL: 7064 return GAP_CONNECTION_ACL; 7065 default: 7066 return GAP_CONNECTION_INVALID; 7067 } 7068 } 7069 7070 hci_role_t gap_get_role(hci_con_handle_t connection_handle){ 7071 hci_connection_t * conn = hci_connection_for_handle(connection_handle); 7072 if (!conn) return HCI_ROLE_INVALID; 7073 return (hci_role_t) conn->role; 7074 } 7075 7076 7077 #ifdef ENABLE_CLASSIC 7078 uint8_t gap_request_role(const bd_addr_t addr, hci_role_t role){ 7079 hci_connection_t * conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 7080 if (!conn) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 7081 conn->request_role = role; 7082 hci_run(); 7083 return ERROR_CODE_SUCCESS; 7084 } 7085 #endif 7086 7087 #ifdef ENABLE_BLE 7088 7089 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){ 7090 hci_connection_t * conn = hci_connection_for_handle(con_handle); 7091 if (!conn) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 7092 7093 conn->le_phy_update_all_phys = all_phys; 7094 conn->le_phy_update_tx_phys = tx_phys; 7095 conn->le_phy_update_rx_phys = rx_phys; 7096 conn->le_phy_update_phy_options = phy_options; 7097 7098 hci_run(); 7099 7100 return 0; 7101 } 7102 7103 static uint8_t hci_whitelist_add(bd_addr_type_t address_type, const bd_addr_t address){ 7104 // check if already in list 7105 btstack_linked_list_iterator_t it; 7106 btstack_linked_list_iterator_init(&it, &hci_stack->le_whitelist); 7107 while (btstack_linked_list_iterator_has_next(&it)) { 7108 whitelist_entry_t *entry = (whitelist_entry_t *) btstack_linked_list_iterator_next(&it); 7109 if (entry->address_type != address_type) { 7110 continue; 7111 } 7112 if (memcmp(entry->address, address, 6) != 0) { 7113 continue; 7114 } 7115 // disallow if already scheduled to add 7116 if ((entry->state & LE_WHITELIST_ADD_TO_CONTROLLER) != 0){ 7117 return ERROR_CODE_COMMAND_DISALLOWED; 7118 } 7119 // still on controller, but scheduled to remove -> re-add 7120 entry->state |= LE_WHITELIST_ADD_TO_CONTROLLER; 7121 return ERROR_CODE_SUCCESS; 7122 } 7123 // alloc and add to list 7124 whitelist_entry_t * entry = btstack_memory_whitelist_entry_get(); 7125 if (!entry) return BTSTACK_MEMORY_ALLOC_FAILED; 7126 entry->address_type = address_type; 7127 (void)memcpy(entry->address, address, 6); 7128 entry->state = LE_WHITELIST_ADD_TO_CONTROLLER; 7129 btstack_linked_list_add(&hci_stack->le_whitelist, (btstack_linked_item_t*) entry); 7130 return ERROR_CODE_SUCCESS; 7131 } 7132 7133 static uint8_t hci_whitelist_remove(bd_addr_type_t address_type, const bd_addr_t address){ 7134 btstack_linked_list_iterator_t it; 7135 btstack_linked_list_iterator_init(&it, &hci_stack->le_whitelist); 7136 while (btstack_linked_list_iterator_has_next(&it)){ 7137 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&it); 7138 if (entry->address_type != address_type) { 7139 continue; 7140 } 7141 if (memcmp(entry->address, address, 6) != 0) { 7142 continue; 7143 } 7144 if (entry->state & LE_WHITELIST_ON_CONTROLLER){ 7145 // remove from controller if already present 7146 entry->state |= LE_WHITELIST_REMOVE_FROM_CONTROLLER; 7147 } else { 7148 // directly remove entry from whitelist 7149 btstack_linked_list_iterator_remove(&it); 7150 btstack_memory_whitelist_entry_free(entry); 7151 } 7152 return ERROR_CODE_SUCCESS; 7153 } 7154 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 7155 } 7156 7157 static void hci_whitelist_clear(void){ 7158 btstack_linked_list_iterator_t it; 7159 btstack_linked_list_iterator_init(&it, &hci_stack->le_whitelist); 7160 while (btstack_linked_list_iterator_has_next(&it)){ 7161 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&it); 7162 if (entry->state & LE_WHITELIST_ON_CONTROLLER){ 7163 // remove from controller if already present 7164 entry->state |= LE_WHITELIST_REMOVE_FROM_CONTROLLER; 7165 continue; 7166 } 7167 // directly remove entry from whitelist 7168 btstack_linked_list_iterator_remove(&it); 7169 btstack_memory_whitelist_entry_free(entry); 7170 } 7171 } 7172 7173 // free all entries unconditionally 7174 static void hci_whitelist_free(void){ 7175 btstack_linked_list_iterator_t lit; 7176 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 7177 while (btstack_linked_list_iterator_has_next(&lit)){ 7178 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&lit); 7179 btstack_linked_list_remove(&hci_stack->le_whitelist, (btstack_linked_item_t *) entry); 7180 btstack_memory_whitelist_entry_free(entry); 7181 } 7182 } 7183 7184 /** 7185 * @brief Clear Whitelist 7186 * @return 0 if ok 7187 */ 7188 uint8_t gap_whitelist_clear(void){ 7189 hci_whitelist_clear(); 7190 hci_run(); 7191 return ERROR_CODE_SUCCESS; 7192 } 7193 7194 /** 7195 * @brief Add Device to Whitelist 7196 * @param address_typ 7197 * @param address 7198 * @return 0 if ok 7199 */ 7200 uint8_t gap_whitelist_add(bd_addr_type_t address_type, const bd_addr_t address){ 7201 uint8_t status = hci_whitelist_add(address_type, address); 7202 if (status){ 7203 return status; 7204 } 7205 hci_run(); 7206 return ERROR_CODE_SUCCESS; 7207 } 7208 7209 /** 7210 * @brief Remove Device from Whitelist 7211 * @param address_typ 7212 * @param address 7213 * @return 0 if ok 7214 */ 7215 uint8_t gap_whitelist_remove(bd_addr_type_t address_type, const bd_addr_t address){ 7216 uint8_t status = hci_whitelist_remove(address_type, address); 7217 if (status){ 7218 return status; 7219 } 7220 hci_run(); 7221 return ERROR_CODE_SUCCESS; 7222 } 7223 7224 #ifdef ENABLE_LE_CENTRAL 7225 /** 7226 * @brief Connect with Whitelist 7227 * @note Explicit whitelist management and this connect with whitelist replace deprecated gap_auto_connection_* functions 7228 * @return - if ok 7229 */ 7230 uint8_t gap_connect_with_whitelist(void){ 7231 if (hci_stack->le_connecting_request != LE_CONNECTING_IDLE){ 7232 return ERROR_CODE_COMMAND_DISALLOWED; 7233 } 7234 hci_stack->le_connecting_request = LE_CONNECTING_WHITELIST; 7235 hci_run(); 7236 return ERROR_CODE_SUCCESS; 7237 } 7238 7239 /** 7240 * @brief Auto Connection Establishment - Start Connecting to device 7241 * @param address_typ 7242 * @param address 7243 * @return 0 if ok 7244 */ 7245 uint8_t gap_auto_connection_start(bd_addr_type_t address_type, const bd_addr_t address){ 7246 if (hci_stack->le_connecting_request == LE_CONNECTING_DIRECT){ 7247 return ERROR_CODE_COMMAND_DISALLOWED; 7248 } 7249 7250 uint8_t status = hci_whitelist_add(address_type, address); 7251 if (status == BTSTACK_MEMORY_ALLOC_FAILED) { 7252 return status; 7253 } 7254 7255 hci_stack->le_connecting_request = LE_CONNECTING_WHITELIST; 7256 7257 hci_run(); 7258 return ERROR_CODE_SUCCESS; 7259 } 7260 7261 /** 7262 * @brief Auto Connection Establishment - Stop Connecting to device 7263 * @param address_typ 7264 * @param address 7265 * @return 0 if ok 7266 */ 7267 uint8_t gap_auto_connection_stop(bd_addr_type_t address_type, const bd_addr_t address){ 7268 if (hci_stack->le_connecting_request == LE_CONNECTING_DIRECT){ 7269 return ERROR_CODE_COMMAND_DISALLOWED; 7270 } 7271 7272 hci_whitelist_remove(address_type, address); 7273 if (btstack_linked_list_empty(&hci_stack->le_whitelist)){ 7274 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 7275 } 7276 hci_run(); 7277 return 0; 7278 } 7279 7280 /** 7281 * @brief Auto Connection Establishment - Stop everything 7282 * @note Convenience function to stop all active auto connection attempts 7283 */ 7284 uint8_t gap_auto_connection_stop_all(void){ 7285 if (hci_stack->le_connecting_request == LE_CONNECTING_DIRECT) { 7286 return ERROR_CODE_COMMAND_DISALLOWED; 7287 } 7288 hci_whitelist_clear(); 7289 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 7290 hci_run(); 7291 return ERROR_CODE_SUCCESS; 7292 } 7293 7294 uint16_t gap_le_connection_interval(hci_con_handle_t con_handle){ 7295 hci_connection_t * conn = hci_connection_for_handle(con_handle); 7296 if (!conn) return 0; 7297 return conn->le_connection_interval; 7298 } 7299 #endif 7300 #endif 7301 7302 #ifdef ENABLE_CLASSIC 7303 /** 7304 * @brief Set Extended Inquiry Response data 7305 * @param eir_data size HCI_EXTENDED_INQUIRY_RESPONSE_DATA_LEN (240) bytes, is not copied make sure memory is accessible during stack startup 7306 * @note has to be done before stack starts up 7307 */ 7308 void gap_set_extended_inquiry_response(const uint8_t * data){ 7309 hci_stack->eir_data = data; 7310 hci_stack->gap_tasks_classic |= GAP_TASK_SET_EIR_DATA; 7311 hci_run(); 7312 } 7313 7314 /** 7315 * @brief Start GAP Classic Inquiry 7316 * @param duration in 1.28s units 7317 * @return 0 if ok 7318 * @events: GAP_EVENT_INQUIRY_RESULT, GAP_EVENT_INQUIRY_COMPLETE 7319 */ 7320 int gap_inquiry_start(uint8_t duration_in_1280ms_units){ 7321 if (hci_stack->state != HCI_STATE_WORKING) return ERROR_CODE_COMMAND_DISALLOWED; 7322 if (hci_stack->inquiry_state != GAP_INQUIRY_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 7323 if ((duration_in_1280ms_units < GAP_INQUIRY_DURATION_MIN) || (duration_in_1280ms_units > GAP_INQUIRY_DURATION_MAX)){ 7324 return ERROR_CODE_INVALID_HCI_COMMAND_PARAMETERS; 7325 } 7326 hci_stack->inquiry_state = duration_in_1280ms_units; 7327 hci_run(); 7328 return 0; 7329 } 7330 7331 /** 7332 * @brief Stop GAP Classic Inquiry 7333 * @return 0 if ok 7334 */ 7335 int gap_inquiry_stop(void){ 7336 if ((hci_stack->inquiry_state >= GAP_INQUIRY_DURATION_MIN) && (hci_stack->inquiry_state <= GAP_INQUIRY_DURATION_MAX)) { 7337 // emit inquiry complete event, before it even started 7338 uint8_t event[] = { GAP_EVENT_INQUIRY_COMPLETE, 1, 0}; 7339 hci_emit_event(event, sizeof(event), 1); 7340 return 0; 7341 } 7342 if (hci_stack->inquiry_state != GAP_INQUIRY_STATE_ACTIVE) return ERROR_CODE_COMMAND_DISALLOWED; 7343 hci_stack->inquiry_state = GAP_INQUIRY_STATE_W2_CANCEL; 7344 hci_run(); 7345 return 0; 7346 } 7347 7348 void gap_inquiry_set_lap(uint32_t lap){ 7349 hci_stack->inquiry_lap = lap; 7350 } 7351 7352 void gap_inquiry_set_scan_activity(uint16_t inquiry_scan_interval, uint16_t inquiry_scan_window){ 7353 hci_stack->inquiry_scan_interval = inquiry_scan_interval; 7354 hci_stack->inquiry_scan_window = inquiry_scan_window; 7355 hci_stack->gap_tasks_classic |= GAP_TASK_WRITE_INQUIRY_SCAN_ACTIVITY; 7356 hci_run(); 7357 } 7358 7359 7360 /** 7361 * @brief Remote Name Request 7362 * @param addr 7363 * @param page_scan_repetition_mode 7364 * @param clock_offset only used when bit 15 is set 7365 * @events: HCI_EVENT_REMOTE_NAME_REQUEST_COMPLETE 7366 */ 7367 int gap_remote_name_request(const bd_addr_t addr, uint8_t page_scan_repetition_mode, uint16_t clock_offset){ 7368 if (hci_stack->remote_name_state != GAP_REMOTE_NAME_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 7369 (void)memcpy(hci_stack->remote_name_addr, addr, 6); 7370 hci_stack->remote_name_page_scan_repetition_mode = page_scan_repetition_mode; 7371 hci_stack->remote_name_clock_offset = clock_offset; 7372 hci_stack->remote_name_state = GAP_REMOTE_NAME_STATE_W2_SEND; 7373 hci_run(); 7374 return 0; 7375 } 7376 7377 static int gap_pairing_set_state_and_run(const bd_addr_t addr, uint8_t state){ 7378 hci_stack->gap_pairing_state = state; 7379 (void)memcpy(hci_stack->gap_pairing_addr, addr, 6); 7380 hci_run(); 7381 return 0; 7382 } 7383 7384 /** 7385 * @brief Legacy Pairing Pin Code Response for binary data / non-strings 7386 * @param addr 7387 * @param pin_data 7388 * @param pin_len 7389 * @return 0 if ok 7390 */ 7391 int gap_pin_code_response_binary(const bd_addr_t addr, const uint8_t * pin_data, uint8_t pin_len){ 7392 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 7393 hci_stack->gap_pairing_input.gap_pairing_pin = pin_data; 7394 hci_stack->gap_pairing_pin_len = pin_len; 7395 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PIN); 7396 } 7397 7398 /** 7399 * @brief Legacy Pairing Pin Code Response 7400 * @param addr 7401 * @param pin 7402 * @return 0 if ok 7403 */ 7404 int gap_pin_code_response(const bd_addr_t addr, const char * pin){ 7405 return gap_pin_code_response_binary(addr, (const uint8_t*) pin, strlen(pin)); 7406 } 7407 7408 /** 7409 * @brief Abort Legacy Pairing 7410 * @param addr 7411 * @param pin 7412 * @return 0 if ok 7413 */ 7414 int gap_pin_code_negative(bd_addr_t addr){ 7415 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 7416 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PIN_NEGATIVE); 7417 } 7418 7419 /** 7420 * @brief SSP Passkey Response 7421 * @param addr 7422 * @param passkey 7423 * @return 0 if ok 7424 */ 7425 int gap_ssp_passkey_response(const bd_addr_t addr, uint32_t passkey){ 7426 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 7427 hci_stack->gap_pairing_input.gap_pairing_passkey = passkey; 7428 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PASSKEY); 7429 } 7430 7431 /** 7432 * @brief Abort SSP Passkey Entry/Pairing 7433 * @param addr 7434 * @param pin 7435 * @return 0 if ok 7436 */ 7437 int gap_ssp_passkey_negative(const bd_addr_t addr){ 7438 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 7439 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PASSKEY_NEGATIVE); 7440 } 7441 7442 /** 7443 * @brief Accept SSP Numeric Comparison 7444 * @param addr 7445 * @param passkey 7446 * @return 0 if ok 7447 */ 7448 int gap_ssp_confirmation_response(const bd_addr_t addr){ 7449 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 7450 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_CONFIRMATION); 7451 } 7452 7453 /** 7454 * @brief Abort SSP Numeric Comparison/Pairing 7455 * @param addr 7456 * @param pin 7457 * @return 0 if ok 7458 */ 7459 int gap_ssp_confirmation_negative(const bd_addr_t addr){ 7460 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 7461 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_CONFIRMATION_NEGATIVE); 7462 } 7463 7464 #if defined(ENABLE_EXPLICIT_IO_CAPABILITIES_REPLY) || defined(ENABLE_EXPLICIT_LINK_KEY_REPLY) 7465 static uint8_t gap_set_auth_flag_and_run(const bd_addr_t addr, hci_authentication_flags_t flag){ 7466 hci_connection_t * conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 7467 if (!conn) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 7468 connectionSetAuthenticationFlags(conn, flag); 7469 hci_run(); 7470 return ERROR_CODE_SUCCESS; 7471 } 7472 #endif 7473 7474 #ifdef ENABLE_EXPLICIT_IO_CAPABILITIES_REPLY 7475 uint8_t gap_ssp_io_capabilities_response(const bd_addr_t addr){ 7476 return gap_set_auth_flag_and_run(addr, AUTH_FLAG_SEND_IO_CAPABILITIES_REPLY); 7477 } 7478 7479 uint8_t gap_ssp_io_capabilities_negative(const bd_addr_t addr){ 7480 return gap_set_auth_flag_and_run(addr, AUTH_FLAG_SEND_IO_CAPABILITIES_NEGATIVE_REPLY); 7481 } 7482 #endif 7483 7484 #ifdef ENABLE_CLASSIC_PAIRING_OOB 7485 /** 7486 * @brief Report Remote OOB Data 7487 * @param bd_addr 7488 * @param c_192 Simple Pairing Hash C derived from P-192 public key 7489 * @param r_192 Simple Pairing Randomizer derived from P-192 public key 7490 * @param c_256 Simple Pairing Hash C derived from P-256 public key 7491 * @param r_256 Simple Pairing Randomizer derived from P-256 public key 7492 */ 7493 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){ 7494 hci_connection_t * connection = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 7495 if (connection == NULL) { 7496 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 7497 } 7498 connection->classic_oob_c_192 = c_192; 7499 connection->classic_oob_r_192 = r_192; 7500 7501 // ignore P-256 if not supported by us 7502 if (hci_stack->secure_connections_active){ 7503 connection->classic_oob_c_256 = c_256; 7504 connection->classic_oob_r_256 = r_256; 7505 } 7506 7507 return ERROR_CODE_SUCCESS; 7508 } 7509 /** 7510 * @brief Generate new OOB data 7511 * @note OOB data will be provided in GAP_EVENT_LOCAL_OOB_DATA and be used in future pairing procedures 7512 */ 7513 void gap_ssp_generate_oob_data(void){ 7514 hci_stack->classic_read_local_oob_data = true; 7515 hci_run(); 7516 } 7517 7518 #endif 7519 7520 #ifdef ENABLE_EXPLICIT_LINK_KEY_REPLY 7521 uint8_t gap_send_link_key_response(const bd_addr_t addr, link_key_t link_key, link_key_type_t type){ 7522 hci_connection_t * connection = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 7523 if (connection == NULL) { 7524 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 7525 } 7526 7527 memcpy(connection->link_key, link_key, sizeof(link_key_t)); 7528 connection->link_key_type = type; 7529 7530 return gap_set_auth_flag_and_run(addr, AUTH_FLAG_HANDLE_LINK_KEY_REQUEST); 7531 } 7532 7533 #endif // ENABLE_EXPLICIT_LINK_KEY_REPLY 7534 /** 7535 * @brief Set inquiry mode: standard, with RSSI, with RSSI + Extended Inquiry Results. Has to be called before power on. 7536 * @param inquiry_mode see bluetooth_defines.h 7537 */ 7538 void hci_set_inquiry_mode(inquiry_mode_t inquiry_mode){ 7539 hci_stack->inquiry_mode = inquiry_mode; 7540 } 7541 7542 /** 7543 * @brief Configure Voice Setting for use with SCO data in HSP/HFP 7544 */ 7545 void hci_set_sco_voice_setting(uint16_t voice_setting){ 7546 hci_stack->sco_voice_setting = voice_setting; 7547 } 7548 7549 /** 7550 * @brief Get SCO Voice Setting 7551 * @return current voice setting 7552 */ 7553 uint16_t hci_get_sco_voice_setting(void){ 7554 return hci_stack->sco_voice_setting; 7555 } 7556 7557 static int hci_have_usb_transport(void){ 7558 if (!hci_stack->hci_transport) return 0; 7559 const char * transport_name = hci_stack->hci_transport->name; 7560 if (!transport_name) return 0; 7561 return (transport_name[0] == 'H') && (transport_name[1] == '2'); 7562 } 7563 7564 /** @brief Get SCO packet length for current SCO Voice setting 7565 * @note Using SCO packets of the exact length is required for USB transfer 7566 * @return Length of SCO packets in bytes (not audio frames) 7567 */ 7568 uint16_t hci_get_sco_packet_length(void){ 7569 uint16_t sco_packet_length = 0; 7570 7571 #ifdef ENABLE_SCO_OVER_HCI 7572 // Transparent = mSBC => 1, CVSD with 16-bit samples requires twice as much bytes 7573 int multiplier = ((hci_stack->sco_voice_setting_active & 0x03) == 0x03) ? 1 : 2; 7574 7575 if (hci_have_usb_transport()){ 7576 // see Core Spec for H2 USB Transfer. 7577 // 3 byte SCO header + 24 bytes per connection 7578 int num_sco_connections = btstack_max(1, hci_number_sco_connections()); 7579 sco_packet_length = 3 + 24 * num_sco_connections * multiplier; 7580 } else { 7581 // 3 byte SCO header + SCO packet size over the air (60 bytes) 7582 sco_packet_length = 3 + 60 * multiplier; 7583 // assert that it still fits inside an SCO buffer 7584 if (sco_packet_length > hci_stack->sco_data_packet_length){ 7585 sco_packet_length = 3 + 60; 7586 } 7587 } 7588 #endif 7589 7590 #ifdef HAVE_SCO_TRANSPORT 7591 // Transparent = mSBC => 1, CVSD with 16-bit samples requires twice as much bytes 7592 int multiplier = ((hci_stack->sco_voice_setting_active & 0x03) == 0x03) ? 1 : 2; 7593 sco_packet_length = 3 + 60 * multiplier; 7594 #endif 7595 return sco_packet_length; 7596 } 7597 7598 /** 7599 * @brief Sets the master/slave policy 7600 * @param policy (0: attempt to become master, 1: let connecting device decide) 7601 */ 7602 void hci_set_master_slave_policy(uint8_t policy){ 7603 hci_stack->master_slave_policy = policy; 7604 } 7605 7606 #endif 7607 7608 HCI_STATE hci_get_state(void){ 7609 return hci_stack->state; 7610 } 7611 7612 #ifdef ENABLE_CLASSIC 7613 void gap_register_classic_connection_filter(int (*accept_callback)(bd_addr_t addr, hci_link_type_t link_type)){ 7614 hci_stack->gap_classic_accept_callback = accept_callback; 7615 } 7616 #endif 7617 7618 /** 7619 * @brief Set callback for Bluetooth Hardware Error 7620 */ 7621 void hci_set_hardware_error_callback(void (*fn)(uint8_t error)){ 7622 hci_stack->hardware_error_callback = fn; 7623 } 7624 7625 void hci_disconnect_all(void){ 7626 btstack_linked_list_iterator_t it; 7627 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 7628 while (btstack_linked_list_iterator_has_next(&it)){ 7629 hci_connection_t * con = (hci_connection_t*) btstack_linked_list_iterator_next(&it); 7630 if (con->state == SENT_DISCONNECT) continue; 7631 con->state = SEND_DISCONNECT; 7632 } 7633 hci_run(); 7634 } 7635 7636 uint16_t hci_get_manufacturer(void){ 7637 return hci_stack->manufacturer; 7638 } 7639 7640 #ifdef ENABLE_BLE 7641 static sm_connection_t * sm_get_connection_for_handle(hci_con_handle_t con_handle){ 7642 hci_connection_t * hci_con = hci_connection_for_handle(con_handle); 7643 if (!hci_con) return NULL; 7644 return &hci_con->sm_connection; 7645 } 7646 7647 // extracted from sm.c to allow enabling of l2cap le data channels without adding sm.c to the build 7648 // without sm.c default values from create_connection_for_bd_addr_and_type() resulg in non-encrypted, not-authenticated 7649 #endif 7650 7651 uint8_t gap_encryption_key_size(hci_con_handle_t con_handle){ 7652 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 7653 if (hci_connection == NULL) return 0; 7654 if (hci_is_le_connection(hci_connection)){ 7655 #ifdef ENABLE_BLE 7656 sm_connection_t * sm_conn = &hci_connection->sm_connection; 7657 if (sm_conn->sm_connection_encrypted) { 7658 return sm_conn->sm_actual_encryption_key_size; 7659 } 7660 #endif 7661 } else { 7662 #ifdef ENABLE_CLASSIC 7663 if ((hci_connection->authentication_flags & AUTH_FLAG_CONNECTION_ENCRYPTED)){ 7664 return hci_connection->encryption_key_size; 7665 } 7666 #endif 7667 } 7668 return 0; 7669 } 7670 7671 bool gap_authenticated(hci_con_handle_t con_handle){ 7672 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 7673 if (hci_connection == NULL) return false; 7674 7675 switch (hci_connection->address_type){ 7676 #ifdef ENABLE_BLE 7677 case BD_ADDR_TYPE_LE_PUBLIC: 7678 case BD_ADDR_TYPE_LE_RANDOM: 7679 if (hci_connection->sm_connection.sm_connection_encrypted == 0) return 0; // unencrypted connection cannot be authenticated 7680 return hci_connection->sm_connection.sm_connection_authenticated != 0; 7681 #endif 7682 #ifdef ENABLE_CLASSIC 7683 case BD_ADDR_TYPE_SCO: 7684 case BD_ADDR_TYPE_ACL: 7685 return gap_authenticated_for_link_key_type(hci_connection->link_key_type); 7686 #endif 7687 default: 7688 return false; 7689 } 7690 } 7691 7692 bool gap_secure_connection(hci_con_handle_t con_handle){ 7693 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 7694 if (hci_connection == NULL) return 0; 7695 7696 switch (hci_connection->address_type){ 7697 #ifdef ENABLE_BLE 7698 case BD_ADDR_TYPE_LE_PUBLIC: 7699 case BD_ADDR_TYPE_LE_RANDOM: 7700 if (hci_connection->sm_connection.sm_connection_encrypted == 0) return false; // unencrypted connection cannot be authenticated 7701 return hci_connection->sm_connection.sm_connection_sc != 0; 7702 #endif 7703 #ifdef ENABLE_CLASSIC 7704 case BD_ADDR_TYPE_SCO: 7705 case BD_ADDR_TYPE_ACL: 7706 return gap_secure_connection_for_link_key_type(hci_connection->link_key_type); 7707 #endif 7708 default: 7709 return false; 7710 } 7711 } 7712 7713 bool gap_bonded(hci_con_handle_t con_handle){ 7714 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 7715 if (hci_connection == NULL) return 0; 7716 7717 #ifdef ENABLE_CLASSIC 7718 link_key_t link_key; 7719 link_key_type_t link_key_type; 7720 #endif 7721 switch (hci_connection->address_type){ 7722 #ifdef ENABLE_BLE 7723 case BD_ADDR_TYPE_LE_PUBLIC: 7724 case BD_ADDR_TYPE_LE_RANDOM: 7725 return hci_connection->sm_connection.sm_le_db_index >= 0; 7726 #endif 7727 #ifdef ENABLE_CLASSIC 7728 case BD_ADDR_TYPE_SCO: 7729 case BD_ADDR_TYPE_ACL: 7730 return hci_stack->link_key_db && hci_stack->link_key_db->get_link_key(hci_connection->address, link_key, &link_key_type); 7731 #endif 7732 default: 7733 return false; 7734 } 7735 } 7736 7737 #ifdef ENABLE_BLE 7738 authorization_state_t gap_authorization_state(hci_con_handle_t con_handle){ 7739 sm_connection_t * sm_conn = sm_get_connection_for_handle(con_handle); 7740 if (!sm_conn) return AUTHORIZATION_UNKNOWN; // wrong connection 7741 if (!sm_conn->sm_connection_encrypted) return AUTHORIZATION_UNKNOWN; // unencrypted connection cannot be authorized 7742 if (!sm_conn->sm_connection_authenticated) return AUTHORIZATION_UNKNOWN; // unauthenticatd connection cannot be authorized 7743 return sm_conn->sm_connection_authorization_state; 7744 } 7745 #endif 7746 7747 #ifdef ENABLE_CLASSIC 7748 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){ 7749 hci_connection_t * conn = hci_connection_for_handle(con_handle); 7750 if (!conn) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 7751 conn->sniff_min_interval = sniff_min_interval; 7752 conn->sniff_max_interval = sniff_max_interval; 7753 conn->sniff_attempt = sniff_attempt; 7754 conn->sniff_timeout = sniff_timeout; 7755 hci_run(); 7756 return 0; 7757 } 7758 7759 /** 7760 * @brief Exit Sniff mode 7761 * @param con_handle 7762 @ @return 0 if ok 7763 */ 7764 uint8_t gap_sniff_mode_exit(hci_con_handle_t con_handle){ 7765 hci_connection_t * conn = hci_connection_for_handle(con_handle); 7766 if (!conn) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 7767 conn->sniff_min_interval = 0xffff; 7768 hci_run(); 7769 return 0; 7770 } 7771 7772 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){ 7773 hci_connection_t * conn = hci_connection_for_handle(con_handle); 7774 if (!conn) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 7775 conn->sniff_subrating_max_latency = max_latency; 7776 conn->sniff_subrating_min_remote_timeout = min_remote_timeout; 7777 conn->sniff_subrating_min_local_timeout = min_local_timeout; 7778 hci_run(); 7779 return ERROR_CODE_SUCCESS; 7780 } 7781 7782 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){ 7783 hci_connection_t * conn = hci_connection_for_handle(con_handle); 7784 if (!conn) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 7785 conn->qos_service_type = service_type; 7786 conn->qos_token_rate = token_rate; 7787 conn->qos_peak_bandwidth = peak_bandwidth; 7788 conn->qos_latency = latency; 7789 conn->qos_delay_variation = delay_variation; 7790 hci_run(); 7791 return ERROR_CODE_SUCCESS; 7792 } 7793 7794 void gap_set_page_scan_activity(uint16_t page_scan_interval, uint16_t page_scan_window){ 7795 hci_stack->new_page_scan_interval = page_scan_interval; 7796 hci_stack->new_page_scan_window = page_scan_window; 7797 hci_stack->gap_tasks_classic |= GAP_TASK_WRITE_PAGE_SCAN_ACTIVITY; 7798 hci_run(); 7799 } 7800 7801 void gap_set_page_scan_type(page_scan_type_t page_scan_type){ 7802 hci_stack->new_page_scan_type = (uint8_t) page_scan_type; 7803 hci_stack->gap_tasks_classic |= GAP_TASK_WRITE_PAGE_SCAN_TYPE; 7804 hci_run(); 7805 } 7806 7807 void gap_set_page_timeout(uint16_t page_timeout){ 7808 hci_stack->page_timeout = page_timeout; 7809 hci_stack->gap_tasks_classic |= GAP_TASK_WRITE_PAGE_TIMEOUT; 7810 hci_run(); 7811 } 7812 7813 #endif 7814 7815 void hci_halting_defer(void){ 7816 if (hci_stack->state != HCI_STATE_HALTING) return; 7817 switch (hci_stack->substate){ 7818 case HCI_HALTING_READY_FOR_CLOSE: 7819 hci_stack->substate = HCI_HALTING_DEFER_CLOSE; 7820 break; 7821 default: 7822 break; 7823 } 7824 } 7825 7826 #ifdef ENABLE_LE_PRIVACY_ADDRESS_RESOLUTION 7827 void hci_load_le_device_db_entry_into_resolving_list(uint16_t le_device_db_index){ 7828 if (le_device_db_index >= MAX_NUM_RESOLVING_LIST_ENTRIES) return; 7829 if (le_device_db_index >= le_device_db_max_count()) return; 7830 uint8_t offset = le_device_db_index >> 3; 7831 uint8_t mask = 1 << (le_device_db_index & 7); 7832 hci_stack->le_resolving_list_add_entries[offset] |= mask; 7833 if (hci_stack->le_resolving_list_state == LE_RESOLVING_LIST_DONE){ 7834 // note: go back to remove entries, otherwise, a remove + add will skip the add 7835 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_REMOVE_ENTRIES; 7836 } 7837 } 7838 7839 void hci_remove_le_device_db_entry_from_resolving_list(uint16_t le_device_db_index){ 7840 if (le_device_db_index >= MAX_NUM_RESOLVING_LIST_ENTRIES) return; 7841 if (le_device_db_index >= le_device_db_max_count()) return; 7842 uint8_t offset = le_device_db_index >> 3; 7843 uint8_t mask = 1 << (le_device_db_index & 7); 7844 hci_stack->le_resolving_list_remove_entries[offset] |= mask; 7845 if (hci_stack->le_resolving_list_state == LE_RESOLVING_LIST_DONE){ 7846 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_REMOVE_ENTRIES; 7847 } 7848 } 7849 7850 uint8_t gap_load_resolving_list_from_le_device_db(void){ 7851 if (hci_command_supported(SUPPORTED_HCI_COMMAND_LE_SET_ADDRESS_RESOLUTION_ENABLE) == false){ 7852 return ERROR_CODE_UNSUPPORTED_FEATURE_OR_PARAMETER_VALUE; 7853 } 7854 if (hci_stack->le_resolving_list_state != LE_RESOLVING_LIST_SEND_ENABLE_ADDRESS_RESOLUTION){ 7855 // restart le resolving list update 7856 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_READ_SIZE; 7857 } 7858 return ERROR_CODE_SUCCESS; 7859 } 7860 #endif 7861 7862 #ifdef FUZZING_BUILD_MODE_UNSAFE_FOR_PRODUCTION 7863 void hci_setup_test_connections_fuzz(void){ 7864 hci_connection_t * conn; 7865 7866 // default address: 66:55:44:33:00:01 7867 bd_addr_t addr = { 0x66, 0x55, 0x44, 0x33, 0x00, 0x00}; 7868 7869 // setup Controller info 7870 hci_stack->num_cmd_packets = 255; 7871 hci_stack->acl_packets_total_num = 255; 7872 7873 // setup incoming Classic ACL connection with con handle 0x0001, 66:55:44:33:22:01 7874 addr[5] = 0x01; 7875 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 7876 conn->con_handle = addr[5]; 7877 conn->role = HCI_ROLE_SLAVE; 7878 conn->state = RECEIVED_CONNECTION_REQUEST; 7879 conn->sm_connection.sm_role = HCI_ROLE_SLAVE; 7880 7881 // setup incoming Classic SCO connection with con handle 0x0002 7882 addr[5] = 0x02; 7883 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_SCO); 7884 conn->con_handle = addr[5]; 7885 conn->role = HCI_ROLE_SLAVE; 7886 conn->state = RECEIVED_CONNECTION_REQUEST; 7887 conn->sm_connection.sm_role = HCI_ROLE_SLAVE; 7888 7889 // setup ready Classic ACL connection with con handle 0x0003 7890 addr[5] = 0x03; 7891 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 7892 conn->con_handle = addr[5]; 7893 conn->role = HCI_ROLE_SLAVE; 7894 conn->state = OPEN; 7895 conn->sm_connection.sm_role = HCI_ROLE_SLAVE; 7896 7897 // setup ready Classic SCO connection with con handle 0x0004 7898 addr[5] = 0x04; 7899 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_SCO); 7900 conn->con_handle = addr[5]; 7901 conn->role = HCI_ROLE_SLAVE; 7902 conn->state = OPEN; 7903 conn->sm_connection.sm_role = HCI_ROLE_SLAVE; 7904 7905 // setup ready LE ACL connection with con handle 0x005 and public address 7906 addr[5] = 0x05; 7907 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_LE_PUBLIC); 7908 conn->con_handle = addr[5]; 7909 conn->role = HCI_ROLE_SLAVE; 7910 conn->state = OPEN; 7911 conn->sm_connection.sm_role = HCI_ROLE_SLAVE; 7912 conn->sm_connection.sm_connection_encrypted = 1; 7913 } 7914 7915 void hci_free_connections_fuzz(void){ 7916 btstack_linked_list_iterator_t it; 7917 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 7918 while (btstack_linked_list_iterator_has_next(&it)){ 7919 hci_connection_t * con = (hci_connection_t*) btstack_linked_list_iterator_next(&it); 7920 btstack_linked_list_iterator_remove(&it); 7921 btstack_memory_hci_connection_free(con); 7922 } 7923 } 7924 void hci_simulate_working_fuzz(void){ 7925 hci_stack->le_scanning_param_update = false; 7926 hci_init_done(); 7927 hci_stack->num_cmd_packets = 255; 7928 } 7929 #endif 7930