1 /* 2 * Copyright (C) 2014 BlueKitchen GmbH 3 * 4 * Redistribution and use in source and binary forms, with or without 5 * modification, are permitted provided that the following conditions 6 * are met: 7 * 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 3. Neither the name of the copyright holders nor the names of 14 * contributors may be used to endorse or promote products derived 15 * from this software without specific prior written permission. 16 * 4. Any redistribution, use, or modification is done solely for 17 * personal benefit and not for any commercial purpose or for 18 * monetary gain. 19 * 20 * THIS SOFTWARE IS PROVIDED BY BLUEKITCHEN GMBH AND CONTRIBUTORS 21 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 22 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS 23 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL BLUEKITCHEN 24 * GMBH OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, 25 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, 26 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS 27 * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED 28 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, 29 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF 30 * THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 31 * SUCH DAMAGE. 32 * 33 * Please inquire about commercial licensing options at 34 * [email protected] 35 * 36 */ 37 38 #define BTSTACK_FILE__ "hci.c" 39 40 /* 41 * hci.c 42 * 43 * Created by Matthias Ringwald on 4/29/09. 44 * 45 */ 46 47 #include "btstack_config.h" 48 49 50 #ifdef ENABLE_CLASSIC 51 #ifdef HAVE_EMBEDDED_TICK 52 #include "btstack_run_loop_embedded.h" 53 #endif 54 #endif 55 56 #ifdef ENABLE_BLE 57 #include "gap.h" 58 #include "ble/le_device_db.h" 59 #endif 60 61 #include <stdarg.h> 62 #include <string.h> 63 #include <inttypes.h> 64 65 #include "btstack_debug.h" 66 #include "btstack_event.h" 67 #include "btstack_linked_list.h" 68 #include "btstack_memory.h" 69 #include "bluetooth_company_id.h" 70 #include "bluetooth_data_types.h" 71 #include "gap.h" 72 #include "hci.h" 73 #include "hci_cmd.h" 74 #include "hci_dump.h" 75 #include "ad_parser.h" 76 77 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 78 #ifndef HCI_HOST_ACL_PACKET_NUM 79 #error "ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL requires to define HCI_HOST_ACL_PACKET_NUM" 80 #endif 81 #ifndef HCI_HOST_ACL_PACKET_LEN 82 #error "ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL requires to define HCI_HOST_ACL_PACKET_LEN" 83 #endif 84 #ifndef HCI_HOST_SCO_PACKET_NUM 85 #error "ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL requires to define HCI_HOST_SCO_PACKET_NUM" 86 #endif 87 #ifndef HCI_HOST_SCO_PACKET_LEN 88 #error "ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL requires to define HCI_HOST_SCO_PACKET_LEN" 89 #endif 90 #endif 91 92 #if defined(ENABLE_SCO_OVER_HCI) && defined(ENABLE_SCO_OVER_PCM) 93 #error "SCO data can either be routed over HCI or over PCM, but not over both. Please only enable ENABLE_SCO_OVER_HCI or ENABLE_SCO_OVER_PCM." 94 #endif 95 96 #if defined(ENABLE_SCO_OVER_HCI) && defined(HAVE_SCO_TRANSPORT) 97 #error "SCO data can either be routed over HCI or over PCM, but not over both. Please only enable ENABLE_SCO_OVER_HCI or HAVE_SCO_TRANSPORT." 98 #endif 99 100 #define HCI_CONNECTION_TIMEOUT_MS 10000 101 102 #ifndef HCI_RESET_RESEND_TIMEOUT_MS 103 #define HCI_RESET_RESEND_TIMEOUT_MS 200 104 #endif 105 106 // Names are arbitrarily shortened to 32 bytes if not requested otherwise 107 #ifndef GAP_INQUIRY_MAX_NAME_LEN 108 #define GAP_INQUIRY_MAX_NAME_LEN 32 109 #endif 110 111 // GAP inquiry state: 0 = off, 0x01 - 0x30 = requested duration, 0xfe = active, 0xff = stop requested 112 #define GAP_INQUIRY_DURATION_MIN 0x01 113 #define GAP_INQUIRY_DURATION_MAX 0x30 114 #define GAP_INQUIRY_STATE_IDLE 0x00 115 #define GAP_INQUIRY_STATE_W4_ACTIVE 0x80 116 #define GAP_INQUIRY_STATE_ACTIVE 0x81 117 #define GAP_INQUIRY_STATE_W2_CANCEL 0x82 118 #define GAP_INQUIRY_STATE_W4_CANCELLED 0x83 119 120 // GAP Remote Name Request 121 #define GAP_REMOTE_NAME_STATE_IDLE 0 122 #define GAP_REMOTE_NAME_STATE_W2_SEND 1 123 #define GAP_REMOTE_NAME_STATE_W4_COMPLETE 2 124 125 // GAP Pairing 126 #define GAP_PAIRING_STATE_IDLE 0 127 #define GAP_PAIRING_STATE_SEND_PIN 1 128 #define GAP_PAIRING_STATE_SEND_PIN_NEGATIVE 2 129 #define GAP_PAIRING_STATE_SEND_PASSKEY 3 130 #define GAP_PAIRING_STATE_SEND_PASSKEY_NEGATIVE 4 131 #define GAP_PAIRING_STATE_SEND_CONFIRMATION 5 132 #define GAP_PAIRING_STATE_SEND_CONFIRMATION_NEGATIVE 6 133 #define GAP_PAIRING_STATE_WAIT_FOR_COMMAND_COMPLETE 7 134 135 // 136 // compact storage of relevant supported HCI Commands. 137 // X-Macro below provides enumeration and mapping table into the supported 138 // commands bitmap (64 bytes) from HCI Read Local Supported Commands 139 // 140 141 // format: command name, byte offset, bit nr in 64-byte supported commands 142 #define SUPPORTED_HCI_COMMANDS \ 143 X( SUPPORTED_HCI_COMMAND_READ_REMOTE_EXTENDED_FEATURES , 2, 5) \ 144 X( SUPPORTED_HCI_COMMAND_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE , 10, 4) \ 145 X( SUPPORTED_HCI_COMMAND_READ_BUFFER_SIZE , 14, 7) \ 146 X( SUPPORTED_HCI_COMMAND_WRITE_DEFAULT_ERRONEOUS_DATA_REPORTING, 18, 3) \ 147 X( SUPPORTED_HCI_COMMAND_READ_ENCRYPTION_KEY_SIZE , 20, 4) \ 148 X( SUPPORTED_HCI_COMMAND_WRITE_LE_HOST_SUPPORTED , 24, 6) \ 149 X( SUPPORTED_HCI_COMMAND_REMOTE_OOB_EXTENDED_DATA_REQUEST_REPLY, 32, 1) \ 150 X( SUPPORTED_HCI_COMMAND_WRITE_SECURE_CONNECTIONS_HOST , 32, 3) \ 151 X( SUPPORTED_HCI_COMMAND_READ_LOCAL_OOB_EXTENDED_DATA_COMMAND , 32, 6) \ 152 X( SUPPORTED_HCI_COMMAND_LE_WRITE_SUGGESTED_DEFAULT_DATA_LENGTH, 34, 0) \ 153 X( SUPPORTED_HCI_COMMAND_LE_READ_MAXIMUM_DATA_LENGTH , 35, 3) \ 154 X( SUPPORTED_HCI_COMMAND_LE_SET_ADDRESS_RESOLUTION_ENABLE , 35, 1) \ 155 X( SUPPORTED_HCI_COMMAND_LE_SET_DEFAULT_PHY , 35, 5) \ 156 X( SUPPORTED_HCI_COMMAND_LE_SET_EXTENDED_ADVERTISING_ENABLE , 36, 6) \ 157 158 // enumerate supported commands 159 #define X(name, offset, bit) name, 160 enum { 161 SUPPORTED_HCI_COMMANDS 162 SUPPORTED_HCI_COMMANDS_COUNT 163 }; 164 #undef X 165 166 // assert supported hci commands bitmap fits into provided storage 167 #if SUPPORTED_HCI_COMMANDS_COUNT > 16 168 #error "Storage for supported HCI commands too small" 169 #endif 170 171 // prototypes 172 #ifdef ENABLE_CLASSIC 173 static void hci_update_scan_enable(void); 174 static void hci_emit_discoverable_enabled(uint8_t enabled); 175 static int hci_local_ssp_activated(void); 176 static bool hci_remote_ssp_supported(hci_con_handle_t con_handle); 177 static bool hci_ssp_supported(hci_connection_t * connection); 178 static void hci_notify_if_sco_can_send_now(void); 179 static void hci_emit_connection_complete(bd_addr_t address, hci_con_handle_t con_handle, uint8_t status); 180 static gap_security_level_t gap_security_level_for_connection(hci_connection_t * connection); 181 static void hci_emit_security_level(hci_con_handle_t con_handle, gap_security_level_t level); 182 static void hci_connection_timeout_handler(btstack_timer_source_t *timer); 183 static void hci_connection_timestamp(hci_connection_t *connection); 184 static void hci_emit_l2cap_check_timeout(hci_connection_t *conn); 185 static void gap_inquiry_explode(uint8_t *packet, uint16_t size); 186 #endif 187 188 static int hci_power_control_on(void); 189 static void hci_power_control_off(void); 190 static void hci_state_reset(void); 191 static void hci_halting_timeout_handler(btstack_timer_source_t * ds); 192 static void hci_emit_transport_packet_sent(void); 193 static void hci_emit_disconnection_complete(hci_con_handle_t con_handle, uint8_t reason); 194 static void hci_emit_nr_connections_changed(void); 195 static void hci_emit_hci_open_failed(void); 196 static void hci_emit_dedicated_bonding_result(bd_addr_t address, uint8_t status); 197 static void hci_emit_event(uint8_t * event, uint16_t size, int dump); 198 static void hci_emit_acl_packet(uint8_t * packet, uint16_t size); 199 static void hci_run(void); 200 static int hci_is_le_connection(hci_connection_t * connection); 201 202 #ifdef ENABLE_CLASSIC 203 static int hci_have_usb_transport(void); 204 static void hci_trigger_remote_features_for_connection(hci_connection_t * connection); 205 #endif 206 207 #ifdef ENABLE_BLE 208 #ifdef ENABLE_LE_CENTRAL 209 // called from test/ble_client/advertising_data_parser.c 210 void le_handle_advertisement_report(uint8_t *packet, uint16_t size); 211 static uint8_t hci_whitelist_remove(bd_addr_type_t address_type, const bd_addr_t address); 212 static void hci_whitelist_free(void); 213 static hci_connection_t * gap_get_outgoing_connection(void); 214 static void hci_le_scan_stop(void); 215 static bool hci_run_general_gap_le(void); 216 #endif 217 #ifdef ENABLE_LE_PERIPHERAL 218 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 219 static le_advertising_set_t * hci_advertising_set_for_handle(uint8_t advertising_handle); 220 #endif /* ENABLE_LE_EXTENDED_ADVERTISING */ 221 #endif /* ENABLE_LE_PERIPHERAL */ 222 #endif /* ENABLE_BLE */ 223 224 // the STACK is here 225 #ifndef HAVE_MALLOC 226 static hci_stack_t hci_stack_static; 227 #endif 228 static hci_stack_t * hci_stack = NULL; 229 230 #ifdef ENABLE_CLASSIC 231 // default name 232 static const char * default_classic_name = "BTstack 00:00:00:00:00:00"; 233 234 // test helper 235 static uint8_t disable_l2cap_timeouts = 0; 236 #endif 237 238 // reset connection state on create and on reconnect 239 // don't overwrite addr, con handle, role 240 static void hci_connection_init(hci_connection_t * conn){ 241 conn->authentication_flags = AUTH_FLAG_NONE; 242 conn->bonding_flags = 0; 243 conn->requested_security_level = LEVEL_0; 244 #ifdef ENABLE_CLASSIC 245 conn->request_role = HCI_ROLE_INVALID; 246 conn->sniff_subrating_max_latency = 0xffff; 247 conn->qos_service_type = HCI_SERVICE_TYPE_INVALID; 248 conn->link_key_type = INVALID_LINK_KEY; 249 btstack_run_loop_set_timer_handler(&conn->timeout, hci_connection_timeout_handler); 250 btstack_run_loop_set_timer_context(&conn->timeout, conn); 251 hci_connection_timestamp(conn); 252 #endif 253 conn->acl_recombination_length = 0; 254 conn->acl_recombination_pos = 0; 255 conn->num_packets_sent = 0; 256 257 conn->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NONE; 258 #ifdef ENABLE_BLE 259 conn->le_phy_update_all_phys = 0xff; 260 #endif 261 #ifdef ENABLE_LE_LIMIT_ACL_FRAGMENT_BY_MAX_OCTETS 262 conn->le_max_tx_octets = 27; 263 #endif 264 #ifdef ENABLE_CLASSIC_PAIRING_OOB 265 conn->classic_oob_c_192 = NULL; 266 conn->classic_oob_r_192 = NULL; 267 conn->classic_oob_c_256 = NULL; 268 conn->classic_oob_r_256 = NULL; 269 #endif 270 } 271 272 /** 273 * create connection for given address 274 * 275 * @return connection OR NULL, if no memory left 276 */ 277 static hci_connection_t * create_connection_for_bd_addr_and_type(const bd_addr_t addr, bd_addr_type_t addr_type){ 278 log_info("create_connection_for_addr %s, type %x", bd_addr_to_str(addr), addr_type); 279 280 hci_connection_t * conn = btstack_memory_hci_connection_get(); 281 if (!conn) return NULL; 282 hci_connection_init(conn); 283 284 bd_addr_copy(conn->address, addr); 285 conn->address_type = addr_type; 286 conn->con_handle = HCI_CON_HANDLE_INVALID; 287 conn->role = HCI_ROLE_INVALID; 288 289 btstack_linked_list_add(&hci_stack->connections, (btstack_linked_item_t *) conn); 290 291 return conn; 292 } 293 294 295 /** 296 * get le connection parameter range 297 * 298 * @return le connection parameter range struct 299 */ 300 void gap_get_connection_parameter_range(le_connection_parameter_range_t * range){ 301 *range = hci_stack->le_connection_parameter_range; 302 } 303 304 /** 305 * set le connection parameter range 306 * 307 */ 308 309 void gap_set_connection_parameter_range(le_connection_parameter_range_t *range){ 310 hci_stack->le_connection_parameter_range = *range; 311 } 312 313 /** 314 * @brief Test if connection parameters are inside in existing rage 315 * @param conn_interval_min (unit: 1.25ms) 316 * @param conn_interval_max (unit: 1.25ms) 317 * @param conn_latency 318 * @param supervision_timeout (unit: 10ms) 319 * @return 1 if included 320 */ 321 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){ 322 if (le_conn_interval_min < existing_range->le_conn_interval_min) return 0; 323 if (le_conn_interval_max > existing_range->le_conn_interval_max) return 0; 324 325 if (le_conn_latency < existing_range->le_conn_latency_min) return 0; 326 if (le_conn_latency > existing_range->le_conn_latency_max) return 0; 327 328 if (le_supervision_timeout < existing_range->le_supervision_timeout_min) return 0; 329 if (le_supervision_timeout > existing_range->le_supervision_timeout_max) return 0; 330 331 return 1; 332 } 333 334 /** 335 * @brief Set max number of connections in LE Peripheral role (if Bluetooth Controller supports it) 336 * @note: default: 1 337 * @param max_peripheral_connections 338 */ 339 #ifdef ENABLE_LE_PERIPHERAL 340 void gap_set_max_number_peripheral_connections(int max_peripheral_connections){ 341 hci_stack->le_max_number_peripheral_connections = max_peripheral_connections; 342 } 343 #endif 344 345 /** 346 * get hci connections iterator 347 * 348 * @return hci connections iterator 349 */ 350 351 void hci_connections_get_iterator(btstack_linked_list_iterator_t *it){ 352 btstack_linked_list_iterator_init(it, &hci_stack->connections); 353 } 354 355 /** 356 * get connection for a given handle 357 * 358 * @return connection OR NULL, if not found 359 */ 360 hci_connection_t * hci_connection_for_handle(hci_con_handle_t con_handle){ 361 btstack_linked_list_iterator_t it; 362 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 363 while (btstack_linked_list_iterator_has_next(&it)){ 364 hci_connection_t * item = (hci_connection_t *) btstack_linked_list_iterator_next(&it); 365 if ( item->con_handle == con_handle ) { 366 return item; 367 } 368 } 369 return NULL; 370 } 371 372 /** 373 * get connection for given address 374 * 375 * @return connection OR NULL, if not found 376 */ 377 hci_connection_t * hci_connection_for_bd_addr_and_type(const bd_addr_t addr, bd_addr_type_t addr_type){ 378 btstack_linked_list_iterator_t it; 379 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 380 while (btstack_linked_list_iterator_has_next(&it)){ 381 hci_connection_t * connection = (hci_connection_t *) btstack_linked_list_iterator_next(&it); 382 if (connection->address_type != addr_type) continue; 383 if (memcmp(addr, connection->address, 6) != 0) continue; 384 return connection; 385 } 386 return NULL; 387 } 388 389 inline static void connectionClearAuthenticationFlags(hci_connection_t * conn, hci_authentication_flags_t flags){ 390 conn->authentication_flags = (hci_authentication_flags_t)(conn->authentication_flags & ~flags); 391 } 392 393 inline static void connectionSetAuthenticationFlags(hci_connection_t * conn, hci_authentication_flags_t flags){ 394 conn->authentication_flags = (hci_authentication_flags_t)(conn->authentication_flags | flags); 395 } 396 397 #ifdef ENABLE_CLASSIC 398 399 #ifdef ENABLE_SCO_OVER_HCI 400 static int hci_number_sco_connections(void){ 401 int connections = 0; 402 btstack_linked_list_iterator_t it; 403 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 404 while (btstack_linked_list_iterator_has_next(&it)){ 405 hci_connection_t * connection = (hci_connection_t *) btstack_linked_list_iterator_next(&it); 406 if (connection->address_type != BD_ADDR_TYPE_SCO) continue; 407 connections++; 408 } 409 return connections; 410 } 411 #endif 412 413 static void hci_connection_timeout_handler(btstack_timer_source_t *timer){ 414 hci_connection_t * connection = (hci_connection_t *) btstack_run_loop_get_timer_context(timer); 415 #ifdef HAVE_EMBEDDED_TICK 416 if (btstack_run_loop_embedded_get_ticks() > connection->timestamp + btstack_run_loop_embedded_ticks_for_ms(HCI_CONNECTION_TIMEOUT_MS)){ 417 // connections might be timed out 418 hci_emit_l2cap_check_timeout(connection); 419 } 420 #else 421 if (btstack_run_loop_get_time_ms() > (connection->timestamp + HCI_CONNECTION_TIMEOUT_MS)){ 422 // connections might be timed out 423 hci_emit_l2cap_check_timeout(connection); 424 } 425 #endif 426 } 427 428 static void hci_connection_timestamp(hci_connection_t *connection){ 429 #ifdef HAVE_EMBEDDED_TICK 430 connection->timestamp = btstack_run_loop_embedded_get_ticks(); 431 #else 432 connection->timestamp = btstack_run_loop_get_time_ms(); 433 #endif 434 } 435 436 /** 437 * add authentication flags and reset timer 438 * @note: assumes classic connection 439 * @note: bd_addr is passed in as litle endian uint8_t * as it is called from parsing packets 440 */ 441 static void hci_add_connection_flags_for_flipped_bd_addr(uint8_t *bd_addr, hci_authentication_flags_t flags){ 442 bd_addr_t addr; 443 reverse_bd_addr(bd_addr, addr); 444 hci_connection_t * conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 445 if (conn) { 446 connectionSetAuthenticationFlags(conn, flags); 447 hci_connection_timestamp(conn); 448 } 449 } 450 451 static bool hci_pairing_active(hci_connection_t * hci_connection){ 452 return (hci_connection->authentication_flags & AUTH_FLAG_PAIRING_ACTIVE_MASK) != 0; 453 } 454 455 static void hci_pairing_started(hci_connection_t * hci_connection, bool ssp){ 456 if (hci_pairing_active(hci_connection)) return; 457 if (ssp){ 458 hci_connection->authentication_flags |= AUTH_FLAG_SSP_PAIRING_ACTIVE; 459 } else { 460 hci_connection->authentication_flags |= AUTH_FLAG_LEGACY_PAIRING_ACTIVE; 461 } 462 // if we are initiator, we have sent an HCI Authenticate Request 463 bool initiator = (hci_connection->bonding_flags & BONDING_SENT_AUTHENTICATE_REQUEST) != 0; 464 465 // if we are responder, use minimal service security level as required level 466 if (!initiator){ 467 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); 468 } 469 470 log_info("pairing started, ssp %u, initiator %u, requested level %u", (int) ssp, (int) initiator, hci_connection->requested_security_level); 471 472 uint8_t event[12]; 473 event[0] = GAP_EVENT_PAIRING_STARTED; 474 event[1] = 10; 475 little_endian_store_16(event, 2, (uint16_t) hci_connection->con_handle); 476 reverse_bd_addr(hci_connection->address, &event[4]); 477 event[10] = (uint8_t) ssp; 478 event[11] = (uint8_t) initiator; 479 hci_emit_event(event, sizeof(event), 1); 480 } 481 482 static void hci_pairing_complete(hci_connection_t * hci_connection, uint8_t status){ 483 hci_connection->requested_security_level = LEVEL_0; 484 if (!hci_pairing_active(hci_connection)) return; 485 hci_connection->authentication_flags &= ~AUTH_FLAG_PAIRING_ACTIVE_MASK; 486 #ifdef ENABLE_CLASSIC_PAIRING_OOB 487 hci_connection->classic_oob_c_192 = NULL; 488 hci_connection->classic_oob_r_192 = NULL; 489 hci_connection->classic_oob_c_256 = NULL; 490 hci_connection->classic_oob_r_256 = NULL; 491 #endif 492 log_info("pairing complete, status %02x", status); 493 494 uint8_t event[11]; 495 event[0] = GAP_EVENT_PAIRING_COMPLETE; 496 event[1] = 9; 497 little_endian_store_16(event, 2, (uint16_t) hci_connection->con_handle); 498 reverse_bd_addr(hci_connection->address, &event[4]); 499 event[10] = status; 500 hci_emit_event(event, sizeof(event), 1); 501 } 502 503 bool hci_authentication_active_for_handle(hci_con_handle_t handle){ 504 hci_connection_t * conn = hci_connection_for_handle(handle); 505 if (!conn) return false; 506 return hci_pairing_active(conn); 507 } 508 509 void gap_drop_link_key_for_bd_addr(bd_addr_t addr){ 510 if (!hci_stack->link_key_db) return; 511 log_info("gap_drop_link_key_for_bd_addr: %s", bd_addr_to_str(addr)); 512 hci_stack->link_key_db->delete_link_key(addr); 513 } 514 515 void gap_store_link_key_for_bd_addr(bd_addr_t addr, link_key_t link_key, link_key_type_t type){ 516 if (!hci_stack->link_key_db) return; 517 log_info("gap_store_link_key_for_bd_addr: %s, type %u", bd_addr_to_str(addr), type); 518 hci_stack->link_key_db->put_link_key(addr, link_key, type); 519 } 520 521 bool gap_get_link_key_for_bd_addr(bd_addr_t addr, link_key_t link_key, link_key_type_t * type){ 522 if (!hci_stack->link_key_db) return false; 523 int result = hci_stack->link_key_db->get_link_key(addr, link_key, type) != 0; 524 log_info("link key for %s available %u, type %u", bd_addr_to_str(addr), result, (int) *type); 525 return result; 526 } 527 528 void gap_delete_all_link_keys(void){ 529 bd_addr_t addr; 530 link_key_t link_key; 531 link_key_type_t type; 532 btstack_link_key_iterator_t it; 533 int ok = gap_link_key_iterator_init(&it); 534 if (!ok) { 535 log_error("could not initialize iterator"); 536 return; 537 } 538 while (gap_link_key_iterator_get_next(&it, addr, link_key, &type)){ 539 gap_drop_link_key_for_bd_addr(addr); 540 } 541 gap_link_key_iterator_done(&it); 542 } 543 544 int gap_link_key_iterator_init(btstack_link_key_iterator_t * it){ 545 if (!hci_stack->link_key_db) return 0; 546 if (!hci_stack->link_key_db->iterator_init) return 0; 547 return hci_stack->link_key_db->iterator_init(it); 548 } 549 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){ 550 if (!hci_stack->link_key_db) return 0; 551 return hci_stack->link_key_db->iterator_get_next(it, bd_addr, link_key, type); 552 } 553 void gap_link_key_iterator_done(btstack_link_key_iterator_t * it){ 554 if (!hci_stack->link_key_db) return; 555 hci_stack->link_key_db->iterator_done(it); 556 } 557 #endif 558 559 static bool hci_is_le_connection_type(bd_addr_type_t address_type){ 560 switch (address_type){ 561 case BD_ADDR_TYPE_LE_PUBLIC: 562 case BD_ADDR_TYPE_LE_RANDOM: 563 case BD_ADDR_TYPE_LE_PRIVAT_FALLBACK_PUBLIC: 564 case BD_ADDR_TYPE_LE_PRIVAT_FALLBACK_RANDOM: 565 return true; 566 default: 567 return false; 568 } 569 } 570 571 static int hci_is_le_connection(hci_connection_t * connection){ 572 return hci_is_le_connection_type(connection->address_type); 573 } 574 575 /** 576 * count connections 577 */ 578 static int nr_hci_connections(void){ 579 int count = 0; 580 btstack_linked_item_t *it; 581 for (it = (btstack_linked_item_t *) hci_stack->connections; it != NULL ; it = it->next){ 582 count++; 583 } 584 return count; 585 } 586 587 uint16_t hci_number_free_acl_slots_for_connection_type(bd_addr_type_t address_type){ 588 589 unsigned int num_packets_sent_classic = 0; 590 unsigned int num_packets_sent_le = 0; 591 592 btstack_linked_item_t *it; 593 for (it = (btstack_linked_item_t *) hci_stack->connections; it != NULL; it = it->next){ 594 hci_connection_t * connection = (hci_connection_t *) it; 595 if (hci_is_le_connection(connection)){ 596 num_packets_sent_le += connection->num_packets_sent; 597 } 598 if (connection->address_type == BD_ADDR_TYPE_ACL){ 599 num_packets_sent_classic += connection->num_packets_sent; 600 } 601 } 602 log_debug("ACL classic buffers: %u used of %u", num_packets_sent_classic, hci_stack->acl_packets_total_num); 603 int free_slots_classic = hci_stack->acl_packets_total_num - num_packets_sent_classic; 604 int free_slots_le = 0; 605 606 if (free_slots_classic < 0){ 607 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); 608 return 0; 609 } 610 611 if (hci_stack->le_acl_packets_total_num){ 612 // if we have LE slots, they are used 613 free_slots_le = hci_stack->le_acl_packets_total_num - num_packets_sent_le; 614 if (free_slots_le < 0){ 615 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); 616 return 0; 617 } 618 } else { 619 // otherwise, classic slots are used for LE, too 620 free_slots_classic -= num_packets_sent_le; 621 if (free_slots_classic < 0){ 622 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); 623 return 0; 624 } 625 } 626 627 switch (address_type){ 628 case BD_ADDR_TYPE_UNKNOWN: 629 log_error("hci_number_free_acl_slots: unknown address type"); 630 return 0; 631 632 case BD_ADDR_TYPE_ACL: 633 return (uint16_t) free_slots_classic; 634 635 default: 636 if (hci_stack->le_acl_packets_total_num > 0){ 637 return (uint16_t) free_slots_le; 638 } 639 return (uint16_t) free_slots_classic; 640 } 641 } 642 643 int hci_number_free_acl_slots_for_handle(hci_con_handle_t con_handle){ 644 // get connection type 645 hci_connection_t * connection = hci_connection_for_handle(con_handle); 646 if (!connection){ 647 log_error("hci_number_free_acl_slots: handle 0x%04x not in connection list", con_handle); 648 return 0; 649 } 650 return hci_number_free_acl_slots_for_connection_type(connection->address_type); 651 } 652 653 #ifdef ENABLE_CLASSIC 654 static int hci_number_free_sco_slots(void){ 655 unsigned int num_sco_packets_sent = 0; 656 btstack_linked_item_t *it; 657 if (hci_stack->synchronous_flow_control_enabled){ 658 // explicit flow control 659 for (it = (btstack_linked_item_t *) hci_stack->connections; it ; it = it->next){ 660 hci_connection_t * connection = (hci_connection_t *) it; 661 if (connection->address_type != BD_ADDR_TYPE_SCO) continue; 662 num_sco_packets_sent += connection->num_packets_sent; 663 } 664 if (num_sco_packets_sent > hci_stack->sco_packets_total_num){ 665 log_info("hci_number_free_sco_slots:packets (%u) > total packets (%u)", num_sco_packets_sent, hci_stack->sco_packets_total_num); 666 return 0; 667 } 668 return hci_stack->sco_packets_total_num - num_sco_packets_sent; 669 } else { 670 // implicit flow control -- TODO 671 int num_ready = 0; 672 for (it = (btstack_linked_item_t *) hci_stack->connections; it ; it = it->next){ 673 hci_connection_t * connection = (hci_connection_t *) it; 674 if (connection->address_type != BD_ADDR_TYPE_SCO) continue; 675 if (connection->sco_tx_ready == 0) continue; 676 num_ready++; 677 } 678 return num_ready; 679 } 680 } 681 #endif 682 683 // only used to send HCI Host Number Completed Packets 684 static int hci_can_send_comand_packet_transport(void){ 685 if (hci_stack->hci_packet_buffer_reserved) return 0; 686 687 // check for async hci transport implementations 688 if (hci_stack->hci_transport->can_send_packet_now){ 689 if (!hci_stack->hci_transport->can_send_packet_now(HCI_COMMAND_DATA_PACKET)){ 690 return 0; 691 } 692 } 693 return 1; 694 } 695 696 // new functions replacing hci_can_send_packet_now[_using_packet_buffer] 697 bool hci_can_send_command_packet_now(void){ 698 if (hci_can_send_comand_packet_transport() == 0) return false; 699 return hci_stack->num_cmd_packets > 0u; 700 } 701 702 static int hci_transport_can_send_prepared_packet_now(uint8_t packet_type){ 703 // check for async hci transport implementations 704 if (!hci_stack->hci_transport->can_send_packet_now) return true; 705 return hci_stack->hci_transport->can_send_packet_now(packet_type); 706 } 707 708 static bool hci_can_send_prepared_acl_packet_for_address_type(bd_addr_type_t address_type){ 709 if (!hci_transport_can_send_prepared_packet_now(HCI_ACL_DATA_PACKET)) return false; 710 return hci_number_free_acl_slots_for_connection_type(address_type) > 0; 711 } 712 713 bool hci_can_send_acl_le_packet_now(void){ 714 if (hci_stack->hci_packet_buffer_reserved) return false; 715 return hci_can_send_prepared_acl_packet_for_address_type(BD_ADDR_TYPE_LE_PUBLIC); 716 } 717 718 bool hci_can_send_prepared_acl_packet_now(hci_con_handle_t con_handle) { 719 if (!hci_transport_can_send_prepared_packet_now(HCI_ACL_DATA_PACKET)) return false; 720 return hci_number_free_acl_slots_for_handle(con_handle) > 0; 721 } 722 723 bool hci_can_send_acl_packet_now(hci_con_handle_t con_handle){ 724 if (hci_stack->hci_packet_buffer_reserved) return false; 725 return hci_can_send_prepared_acl_packet_now(con_handle); 726 } 727 728 #ifdef ENABLE_CLASSIC 729 bool hci_can_send_acl_classic_packet_now(void){ 730 if (hci_stack->hci_packet_buffer_reserved) return false; 731 return hci_can_send_prepared_acl_packet_for_address_type(BD_ADDR_TYPE_ACL); 732 } 733 734 bool hci_can_send_prepared_sco_packet_now(void){ 735 if (!hci_transport_can_send_prepared_packet_now(HCI_SCO_DATA_PACKET)) return false; 736 if (hci_have_usb_transport()){ 737 return hci_stack->sco_can_send_now; 738 } else { 739 return hci_number_free_sco_slots() > 0; 740 } 741 } 742 743 bool hci_can_send_sco_packet_now(void){ 744 if (hci_stack->hci_packet_buffer_reserved) return false; 745 return hci_can_send_prepared_sco_packet_now(); 746 } 747 748 void hci_request_sco_can_send_now_event(void){ 749 hci_stack->sco_waiting_for_can_send_now = 1; 750 hci_notify_if_sco_can_send_now(); 751 } 752 #endif 753 754 // used for internal checks in l2cap.c 755 bool hci_is_packet_buffer_reserved(void){ 756 return hci_stack->hci_packet_buffer_reserved; 757 } 758 759 // reserves outgoing packet buffer. 760 // @return 1 if successful 761 bool hci_reserve_packet_buffer(void){ 762 if (hci_stack->hci_packet_buffer_reserved) { 763 log_error("hci_reserve_packet_buffer called but buffer already reserved"); 764 return false; 765 } 766 hci_stack->hci_packet_buffer_reserved = true; 767 return true; 768 } 769 770 void hci_release_packet_buffer(void){ 771 hci_stack->hci_packet_buffer_reserved = false; 772 } 773 774 // assumption: synchronous implementations don't provide can_send_packet_now as they don't keep the buffer after the call 775 static int hci_transport_synchronous(void){ 776 return hci_stack->hci_transport->can_send_packet_now == NULL; 777 } 778 779 static uint8_t hci_send_acl_packet_fragments(hci_connection_t *connection){ 780 781 // 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); 782 783 // max ACL data packet length depends on connection type (LE vs. Classic) and available buffers 784 uint16_t max_acl_data_packet_length = hci_stack->acl_data_packet_length; 785 if (hci_is_le_connection(connection) && (hci_stack->le_data_packets_length > 0u)){ 786 max_acl_data_packet_length = hci_stack->le_data_packets_length; 787 } 788 789 #ifdef ENABLE_LE_LIMIT_ACL_FRAGMENT_BY_MAX_OCTETS 790 if (hci_is_le_connection(connection) && (connection->le_max_tx_octets < max_acl_data_packet_length)){ 791 max_acl_data_packet_length = connection->le_max_tx_octets; 792 } 793 #endif 794 795 log_debug("hci_send_acl_packet_fragments entered"); 796 797 uint8_t status = ERROR_CODE_SUCCESS; 798 // multiple packets could be send on a synchronous HCI transport 799 while (true){ 800 801 log_debug("hci_send_acl_packet_fragments loop entered"); 802 803 // get current data 804 const uint16_t acl_header_pos = hci_stack->acl_fragmentation_pos - 4u; 805 int current_acl_data_packet_length = hci_stack->acl_fragmentation_total_size - hci_stack->acl_fragmentation_pos; 806 bool more_fragments = false; 807 808 // if ACL packet is larger than Bluetooth packet buffer, only send max_acl_data_packet_length 809 if (current_acl_data_packet_length > max_acl_data_packet_length){ 810 more_fragments = true; 811 current_acl_data_packet_length = max_acl_data_packet_length; 812 } 813 814 // copy handle_and_flags if not first fragment and update packet boundary flags to be 01 (continuing fragmnent) 815 if (acl_header_pos > 0u){ 816 uint16_t handle_and_flags = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 817 handle_and_flags = (handle_and_flags & 0xcfffu) | (1u << 12u); 818 little_endian_store_16(hci_stack->hci_packet_buffer, acl_header_pos, handle_and_flags); 819 } 820 821 // update header len 822 little_endian_store_16(hci_stack->hci_packet_buffer, acl_header_pos + 2u, current_acl_data_packet_length); 823 824 // count packet 825 connection->num_packets_sent++; 826 log_debug("hci_send_acl_packet_fragments loop before send (more fragments %d)", (int) more_fragments); 827 828 // update state for next fragment (if any) as "transport done" might be sent during send_packet already 829 if (more_fragments){ 830 // update start of next fragment to send 831 hci_stack->acl_fragmentation_pos += current_acl_data_packet_length; 832 } else { 833 // done 834 hci_stack->acl_fragmentation_pos = 0; 835 hci_stack->acl_fragmentation_total_size = 0; 836 } 837 838 // send packet 839 uint8_t * packet = &hci_stack->hci_packet_buffer[acl_header_pos]; 840 const int size = current_acl_data_packet_length + 4; 841 hci_dump_packet(HCI_ACL_DATA_PACKET, 0, packet, size); 842 hci_stack->acl_fragmentation_tx_active = 1; 843 int err = hci_stack->hci_transport->send_packet(HCI_ACL_DATA_PACKET, packet, size); 844 if (err != 0){ 845 // no error from HCI Transport expected 846 status = ERROR_CODE_HARDWARE_FAILURE; 847 } 848 849 log_debug("hci_send_acl_packet_fragments loop after send (more fragments %d)", (int) more_fragments); 850 851 // done yet? 852 if (!more_fragments) break; 853 854 // can send more? 855 if (!hci_can_send_prepared_acl_packet_now(connection->con_handle)) return status; 856 } 857 858 log_debug("hci_send_acl_packet_fragments loop over"); 859 860 // release buffer now for synchronous transport 861 if (hci_transport_synchronous()){ 862 hci_stack->acl_fragmentation_tx_active = 0; 863 hci_release_packet_buffer(); 864 hci_emit_transport_packet_sent(); 865 } 866 867 return status; 868 } 869 870 // pre: caller has reserved the packet buffer 871 uint8_t hci_send_acl_packet_buffer(int size){ 872 btstack_assert(hci_stack->hci_packet_buffer_reserved); 873 874 uint8_t * packet = hci_stack->hci_packet_buffer; 875 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(packet); 876 877 // check for free places on Bluetooth module 878 if (!hci_can_send_prepared_acl_packet_now(con_handle)) { 879 log_error("hci_send_acl_packet_buffer called but no free ACL buffers on controller"); 880 hci_release_packet_buffer(); 881 hci_emit_transport_packet_sent(); 882 return BTSTACK_ACL_BUFFERS_FULL; 883 } 884 885 hci_connection_t *connection = hci_connection_for_handle( con_handle); 886 if (!connection) { 887 log_error("hci_send_acl_packet_buffer called but no connection for handle 0x%04x", con_handle); 888 hci_release_packet_buffer(); 889 hci_emit_transport_packet_sent(); 890 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 891 } 892 893 #ifdef ENABLE_CLASSIC 894 hci_connection_timestamp(connection); 895 #endif 896 897 // hci_dump_packet( HCI_ACL_DATA_PACKET, 0, packet, size); 898 899 // setup data 900 hci_stack->acl_fragmentation_total_size = size; 901 hci_stack->acl_fragmentation_pos = 4; // start of L2CAP packet 902 903 return hci_send_acl_packet_fragments(connection); 904 } 905 906 #ifdef ENABLE_CLASSIC 907 // pre: caller has reserved the packet buffer 908 uint8_t hci_send_sco_packet_buffer(int size){ 909 btstack_assert(hci_stack->hci_packet_buffer_reserved); 910 911 uint8_t * packet = hci_stack->hci_packet_buffer; 912 913 // skip checks in loopback mode 914 if (!hci_stack->loopback_mode){ 915 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(packet); // same for ACL and SCO 916 917 // check for free places on Bluetooth module 918 if (!hci_can_send_prepared_sco_packet_now()) { 919 log_error("hci_send_sco_packet_buffer called but no free SCO buffers on controller"); 920 hci_release_packet_buffer(); 921 hci_emit_transport_packet_sent(); 922 return BTSTACK_ACL_BUFFERS_FULL; 923 } 924 925 // track send packet in connection struct 926 hci_connection_t *connection = hci_connection_for_handle( con_handle); 927 if (!connection) { 928 log_error("hci_send_sco_packet_buffer called but no connection for handle 0x%04x", con_handle); 929 hci_release_packet_buffer(); 930 hci_emit_transport_packet_sent(); 931 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 932 } 933 934 if (hci_have_usb_transport()){ 935 // token used 936 hci_stack->sco_can_send_now = false; 937 } else { 938 if (hci_stack->synchronous_flow_control_enabled){ 939 connection->num_packets_sent++; 940 } else { 941 connection->sco_tx_ready--; 942 } 943 } 944 } 945 946 hci_dump_packet( HCI_SCO_DATA_PACKET, 0, packet, size); 947 948 #ifdef HAVE_SCO_TRANSPORT 949 hci_stack->sco_transport->send_packet(packet, size); 950 hci_release_packet_buffer(); 951 hci_emit_transport_packet_sent(); 952 953 return 0; 954 #else 955 int err = hci_stack->hci_transport->send_packet(HCI_SCO_DATA_PACKET, packet, size); 956 if (hci_transport_synchronous()){ 957 hci_release_packet_buffer(); 958 hci_emit_transport_packet_sent(); 959 } 960 961 if (err != 0){ 962 return ERROR_CODE_HARDWARE_FAILURE; 963 } 964 return ERROR_CODE_SUCCESS; 965 #endif 966 } 967 #endif 968 969 static void acl_handler(uint8_t *packet, uint16_t size){ 970 971 // get info 972 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(packet); 973 hci_connection_t *conn = hci_connection_for_handle(con_handle); 974 uint8_t acl_flags = READ_ACL_FLAGS(packet); 975 uint16_t acl_length = READ_ACL_LENGTH(packet); 976 977 // ignore non-registered handle 978 if (!conn){ 979 log_error("acl_handler called with non-registered handle %u!" , con_handle); 980 return; 981 } 982 983 // assert packet is complete 984 if ((acl_length + 4u) != size){ 985 log_error("acl_handler called with ACL packet of wrong size %d, expected %u => dropping packet", size, acl_length + 4); 986 return; 987 } 988 989 #ifdef ENABLE_CLASSIC 990 // update idle timestamp 991 hci_connection_timestamp(conn); 992 #endif 993 994 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 995 hci_stack->host_completed_packets = 1; 996 conn->num_packets_completed++; 997 #endif 998 999 // handle different packet types 1000 switch (acl_flags & 0x03u) { 1001 1002 case 0x01: // continuation fragment 1003 1004 // sanity checks 1005 if (conn->acl_recombination_pos == 0u) { 1006 log_error( "ACL Cont Fragment but no first fragment for handle 0x%02x", con_handle); 1007 return; 1008 } 1009 if ((conn->acl_recombination_pos + acl_length) > (4u + HCI_ACL_BUFFER_SIZE)){ 1010 log_error( "ACL Cont Fragment to large: combined packet %u > buffer size %u for handle 0x%02x", 1011 conn->acl_recombination_pos + acl_length, 4 + HCI_ACL_BUFFER_SIZE, con_handle); 1012 conn->acl_recombination_pos = 0; 1013 return; 1014 } 1015 1016 // append fragment payload (header already stored) 1017 (void)memcpy(&conn->acl_recombination_buffer[HCI_INCOMING_PRE_BUFFER_SIZE + conn->acl_recombination_pos], 1018 &packet[4], acl_length); 1019 conn->acl_recombination_pos += acl_length; 1020 1021 // forward complete L2CAP packet if complete. 1022 if (conn->acl_recombination_pos >= (conn->acl_recombination_length + 4u + 4u)){ // pos already incl. ACL header 1023 hci_emit_acl_packet(&conn->acl_recombination_buffer[HCI_INCOMING_PRE_BUFFER_SIZE], conn->acl_recombination_pos); 1024 // reset recombination buffer 1025 conn->acl_recombination_length = 0; 1026 conn->acl_recombination_pos = 0; 1027 } 1028 break; 1029 1030 case 0x02: { // first fragment 1031 1032 // sanity check 1033 if (conn->acl_recombination_pos) { 1034 log_error( "ACL First Fragment but data in buffer for handle 0x%02x, dropping stale fragments", con_handle); 1035 conn->acl_recombination_pos = 0; 1036 } 1037 1038 // peek into L2CAP packet! 1039 uint16_t l2cap_length = READ_L2CAP_LENGTH( packet ); 1040 1041 // compare fragment size to L2CAP packet size 1042 if (acl_length >= (l2cap_length + 4u)){ 1043 // forward fragment as L2CAP packet 1044 hci_emit_acl_packet(packet, acl_length + 4u); 1045 } else { 1046 1047 if (acl_length > HCI_ACL_BUFFER_SIZE){ 1048 log_error( "ACL First Fragment to large: fragment %u > buffer size %u for handle 0x%02x", 1049 4 + acl_length, 4 + HCI_ACL_BUFFER_SIZE, con_handle); 1050 return; 1051 } 1052 1053 // store first fragment and tweak acl length for complete package 1054 (void)memcpy(&conn->acl_recombination_buffer[HCI_INCOMING_PRE_BUFFER_SIZE], 1055 packet, acl_length + 4u); 1056 conn->acl_recombination_pos = acl_length + 4u; 1057 conn->acl_recombination_length = l2cap_length; 1058 little_endian_store_16(conn->acl_recombination_buffer, HCI_INCOMING_PRE_BUFFER_SIZE + 2u, l2cap_length +4u); 1059 } 1060 break; 1061 1062 } 1063 default: 1064 log_error( "acl_handler called with invalid packet boundary flags %u", acl_flags & 0x03); 1065 return; 1066 } 1067 1068 // execute main loop 1069 hci_run(); 1070 } 1071 1072 static void hci_connection_stop_timer(hci_connection_t * conn){ 1073 btstack_run_loop_remove_timer(&conn->timeout); 1074 #ifdef ENABLE_CLASSIC 1075 btstack_run_loop_remove_timer(&conn->timeout_sco); 1076 #endif 1077 } 1078 1079 static void hci_shutdown_connection(hci_connection_t *conn){ 1080 log_info("Connection closed: handle 0x%x, %s", conn->con_handle, bd_addr_to_str(conn->address)); 1081 1082 #ifdef ENABLE_CLASSIC 1083 #if defined(ENABLE_SCO_OVER_HCI) || defined(HAVE_SCO_TRANSPORT) 1084 bd_addr_type_t addr_type = conn->address_type; 1085 #endif 1086 #ifdef HAVE_SCO_TRANSPORT 1087 hci_con_handle_t con_handle = conn->con_handle; 1088 #endif 1089 #endif 1090 1091 hci_connection_stop_timer(conn); 1092 1093 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 1094 btstack_memory_hci_connection_free( conn ); 1095 1096 // now it's gone 1097 hci_emit_nr_connections_changed(); 1098 1099 #ifdef ENABLE_CLASSIC 1100 #ifdef ENABLE_SCO_OVER_HCI 1101 // update SCO 1102 if ((addr_type == BD_ADDR_TYPE_SCO) && (hci_stack->hci_transport != NULL) && (hci_stack->hci_transport->set_sco_config != NULL)){ 1103 hci_stack->hci_transport->set_sco_config(hci_stack->sco_voice_setting_active, hci_number_sco_connections()); 1104 } 1105 #endif 1106 #ifdef HAVE_SCO_TRANSPORT 1107 if ((addr_type == BD_ADDR_TYPE_SCO) && (hci_stack->sco_transport != NULL)){ 1108 hci_stack->sco_transport->close(con_handle); 1109 } 1110 #endif 1111 #endif 1112 } 1113 1114 #ifdef ENABLE_CLASSIC 1115 1116 static const uint16_t packet_type_sizes[] = { 1117 0, HCI_ACL_2DH1_SIZE, HCI_ACL_3DH1_SIZE, HCI_ACL_DM1_SIZE, 1118 HCI_ACL_DH1_SIZE, 0, 0, 0, 1119 HCI_ACL_2DH3_SIZE, HCI_ACL_3DH3_SIZE, HCI_ACL_DM3_SIZE, HCI_ACL_DH3_SIZE, 1120 HCI_ACL_2DH5_SIZE, HCI_ACL_3DH5_SIZE, HCI_ACL_DM5_SIZE, HCI_ACL_DH5_SIZE 1121 }; 1122 static const uint8_t packet_type_feature_requirement_bit[] = { 1123 0, // 3 slot packets 1124 1, // 5 slot packets 1125 25, // EDR 2 mpbs 1126 26, // EDR 3 mbps 1127 39, // 3 slot EDR packts 1128 40, // 5 slot EDR packet 1129 }; 1130 static const uint16_t packet_type_feature_packet_mask[] = { 1131 0x0f00, // 3 slot packets 1132 0xf000, // 5 slot packets 1133 0x1102, // EDR 2 mpbs 1134 0x2204, // EDR 3 mbps 1135 0x0300, // 3 slot EDR packts 1136 0x3000, // 5 slot EDR packet 1137 }; 1138 1139 static uint16_t hci_acl_packet_types_for_buffer_size_and_local_features(uint16_t buffer_size, uint8_t * local_supported_features){ 1140 // enable packet types based on size 1141 uint16_t packet_types = 0; 1142 unsigned int i; 1143 for (i=0;i<16;i++){ 1144 if (packet_type_sizes[i] == 0) continue; 1145 if (packet_type_sizes[i] <= buffer_size){ 1146 packet_types |= 1 << i; 1147 } 1148 } 1149 // disable packet types due to missing local supported features 1150 for (i=0;i<sizeof(packet_type_feature_requirement_bit);i++){ 1151 unsigned int bit_idx = packet_type_feature_requirement_bit[i]; 1152 int feature_set = (local_supported_features[bit_idx >> 3] & (1<<(bit_idx & 7))) != 0; 1153 if (feature_set) continue; 1154 log_info("Features bit %02u is not set, removing packet types 0x%04x", bit_idx, packet_type_feature_packet_mask[i]); 1155 packet_types &= ~packet_type_feature_packet_mask[i]; 1156 } 1157 // flip bits for "may not be used" 1158 packet_types ^= 0x3306; 1159 return packet_types; 1160 } 1161 1162 uint16_t hci_usable_acl_packet_types(void){ 1163 return hci_stack->packet_types; 1164 } 1165 #endif 1166 1167 uint8_t* hci_get_outgoing_packet_buffer(void){ 1168 // hci packet buffer is >= acl data packet length 1169 return hci_stack->hci_packet_buffer; 1170 } 1171 1172 uint16_t hci_max_acl_data_packet_length(void){ 1173 return hci_stack->acl_data_packet_length; 1174 } 1175 1176 #ifdef ENABLE_CLASSIC 1177 bool hci_extended_sco_link_supported(void){ 1178 // No. 31, byte 3, bit 7 1179 return (hci_stack->local_supported_features[3] & (1 << 7)) != 0; 1180 } 1181 #endif 1182 1183 bool hci_non_flushable_packet_boundary_flag_supported(void){ 1184 // No. 54, byte 6, bit 6 1185 return (hci_stack->local_supported_features[6u] & (1u << 6u)) != 0u; 1186 } 1187 1188 #ifdef ENABLE_CLASSIC 1189 static int gap_ssp_supported(void){ 1190 // No. 51, byte 6, bit 3 1191 return (hci_stack->local_supported_features[6u] & (1u << 3u)) != 0u; 1192 } 1193 #endif 1194 1195 static int hci_classic_supported(void){ 1196 #ifdef ENABLE_CLASSIC 1197 // No. 37, byte 4, bit 5, = No BR/EDR Support 1198 return (hci_stack->local_supported_features[4] & (1 << 5)) == 0; 1199 #else 1200 return 0; 1201 #endif 1202 } 1203 1204 static int hci_le_supported(void){ 1205 #ifdef ENABLE_BLE 1206 // No. 37, byte 4, bit 6 = LE Supported (Controller) 1207 return (hci_stack->local_supported_features[4u] & (1u << 6u)) != 0u; 1208 #else 1209 return 0; 1210 #endif 1211 } 1212 1213 static bool hci_command_supported(uint8_t command_index){ 1214 return (hci_stack->local_supported_commands & (1LU << command_index)) != 0; 1215 } 1216 1217 #ifdef ENABLE_BLE 1218 1219 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 1220 static bool hci_extended_advertising_supported(void){ 1221 return hci_command_supported(SUPPORTED_HCI_COMMAND_LE_SET_EXTENDED_ADVERTISING_ENABLE); 1222 } 1223 #endif 1224 1225 static void hci_get_own_address_for_addr_type(uint8_t own_addr_type, bd_addr_t own_addr){ 1226 if (own_addr_type == BD_ADDR_TYPE_LE_PUBLIC){ 1227 (void)memcpy(own_addr, hci_stack->local_bd_addr, 6); 1228 } else { 1229 (void)memcpy(own_addr, hci_stack->le_random_address, 6); 1230 } 1231 } 1232 1233 void gap_le_get_own_address(uint8_t * addr_type, bd_addr_t addr){ 1234 *addr_type = hci_stack->le_own_addr_type; 1235 hci_get_own_address_for_addr_type(hci_stack->le_own_addr_type, addr); 1236 } 1237 1238 #ifdef ENABLE_LE_PERIPHERAL 1239 void gap_le_get_own_advertisements_address(uint8_t * addr_type, bd_addr_t addr){ 1240 *addr_type = hci_stack->le_advertisements_own_addr_type; 1241 hci_get_own_address_for_addr_type(hci_stack->le_advertisements_own_addr_type, addr); 1242 }; 1243 #endif 1244 1245 #ifdef ENABLE_LE_CENTRAL 1246 1247 /** 1248 * @brief Get own addr type and address used for LE connections (Central) 1249 */ 1250 void gap_le_get_own_connection_address(uint8_t * addr_type, bd_addr_t addr){ 1251 *addr_type = hci_stack->le_connection_own_addr_type; 1252 hci_get_own_address_for_addr_type(hci_stack->le_connection_own_addr_type, addr); 1253 } 1254 1255 void le_handle_advertisement_report(uint8_t *packet, uint16_t size){ 1256 1257 uint16_t offset = 3; 1258 uint8_t num_reports = packet[offset]; 1259 offset += 1; 1260 1261 uint16_t i; 1262 uint8_t event[12 + LE_ADVERTISING_DATA_SIZE]; // use upper bound to avoid var size automatic var 1263 for (i=0; (i<num_reports) && (offset < size);i++){ 1264 // sanity checks on data_length: 1265 uint8_t data_length = packet[offset + 8]; 1266 if (data_length > LE_ADVERTISING_DATA_SIZE) return; 1267 if ((offset + 9u + data_length + 1u) > size) return; 1268 // setup event 1269 uint8_t event_size = 10u + data_length; 1270 uint16_t pos = 0; 1271 event[pos++] = GAP_EVENT_ADVERTISING_REPORT; 1272 event[pos++] = event_size; 1273 (void)memcpy(&event[pos], &packet[offset], 1 + 1 + 6); // event type + address type + address 1274 offset += 8; 1275 pos += 8; 1276 event[pos++] = packet[offset + 1 + data_length]; // rssi 1277 event[pos++] = data_length; 1278 offset++; 1279 (void)memcpy(&event[pos], &packet[offset], data_length); 1280 pos += data_length; 1281 offset += data_length + 1u; // rssi 1282 hci_emit_event(event, pos, 1); 1283 } 1284 } 1285 1286 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 1287 void le_handle_extended_advertisement_report(uint8_t *packet, uint16_t size) { 1288 uint16_t offset = 3; 1289 uint8_t num_reports = packet[offset++]; 1290 uint8_t event[2 + 255]; // use upper bound to avoid var size automatic var 1291 uint8_t i; 1292 for (i=0; (i<num_reports) && (offset < size);i++){ 1293 // sanity checks on data_length: 1294 uint16_t data_length = packet[offset + 23]; 1295 if (data_length > LE_ADVERTISING_DATA_SIZE) return; 1296 if ((offset + 24u + data_length) > size) return; 1297 uint16_t event_type = little_endian_read_16(packet, offset); 1298 offset += 2; 1299 if ((event_type & 0x10) != 0) { 1300 // setup legacy event 1301 uint8_t legacy_event_type; 1302 switch (event_type){ 1303 case 0b0010011: 1304 // ADV_IND 1305 legacy_event_type = 0; 1306 break; 1307 case 0b0010101: 1308 // ADV_DIRECT_IND 1309 legacy_event_type = 1; 1310 break; 1311 case 0b0010010: 1312 // ADV_SCAN_IND 1313 legacy_event_type = 2; 1314 break; 1315 case 0b0010000: 1316 // ADV_NONCONN_IND 1317 legacy_event_type = 3; 1318 break; 1319 case 0b0011011: 1320 case 0b0011010: 1321 // SCAN_RSP 1322 legacy_event_type = 4; 1323 break; 1324 default: 1325 legacy_event_type = 0; 1326 break; 1327 } 1328 uint16_t pos = 0; 1329 event[pos++] = GAP_EVENT_ADVERTISING_REPORT; 1330 event[pos++] = 10u + data_length; 1331 event[pos++] = legacy_event_type; 1332 // copy address type + address 1333 (void) memcpy(&event[pos], &packet[offset], 1 + 6); 1334 offset += 7; 1335 pos += 7; 1336 // skip primary_phy, secondary_phy, advertising_sid, tx_power 1337 offset += 4; 1338 // copy rssi 1339 event[pos++] = packet[offset++]; 1340 // skip periodic advertising interval and direct address 1341 offset += 9; 1342 // copy data len + data; 1343 (void) memcpy(&event[pos], &packet[offset], 1 + data_length); 1344 pos += 1 +data_length; 1345 offset += 1+ data_length; 1346 hci_emit_event(event, pos, 1); 1347 } else { 1348 event[0] = GAP_EVENT_EXTENDED_ADVERTISING_REPORT; 1349 uint8_t report_len = 24 + data_length; 1350 event[1] = report_len; 1351 little_endian_store_16(event, 2, event_type); 1352 memcpy(&event[4], &packet[offset], report_len); 1353 offset += report_len; 1354 hci_emit_event(event, 2 + report_len, 1); 1355 } 1356 } 1357 } 1358 #endif 1359 1360 #endif 1361 #endif 1362 1363 #ifdef ENABLE_BLE 1364 #ifdef ENABLE_LE_PERIPHERAL 1365 static void hci_update_advertisements_enabled_for_current_roles(void){ 1366 if ((hci_stack->le_advertisements_state & LE_ADVERTISEMENT_STATE_ENABLED) != 0){ 1367 // get number of active le slave connections 1368 int num_slave_connections = 0; 1369 btstack_linked_list_iterator_t it; 1370 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 1371 while (btstack_linked_list_iterator_has_next(&it)){ 1372 hci_connection_t * con = (hci_connection_t*) btstack_linked_list_iterator_next(&it); 1373 log_info("state %u, role %u, le_con %u", con->state, con->role, hci_is_le_connection(con)); 1374 if (con->state != OPEN) continue; 1375 if (con->role != HCI_ROLE_SLAVE) continue; 1376 if (!hci_is_le_connection(con)) continue; 1377 num_slave_connections++; 1378 } 1379 log_info("Num LE Peripheral roles: %u of %u", num_slave_connections, hci_stack->le_max_number_peripheral_connections); 1380 hci_stack->le_advertisements_enabled_for_current_roles = num_slave_connections < hci_stack->le_max_number_peripheral_connections; 1381 } else { 1382 hci_stack->le_advertisements_enabled_for_current_roles = false; 1383 } 1384 } 1385 #endif 1386 #endif 1387 1388 #ifdef ENABLE_CLASSIC 1389 static void gap_run_set_local_name(void){ 1390 hci_reserve_packet_buffer(); 1391 uint8_t * packet = hci_stack->hci_packet_buffer; 1392 // construct HCI Command and send 1393 uint16_t opcode = hci_write_local_name.opcode; 1394 hci_stack->last_cmd_opcode = opcode; 1395 packet[0] = opcode & 0xff; 1396 packet[1] = opcode >> 8; 1397 packet[2] = DEVICE_NAME_LEN; 1398 memset(&packet[3], 0, DEVICE_NAME_LEN); 1399 uint16_t name_len = (uint16_t) strlen(hci_stack->local_name); 1400 uint16_t bytes_to_copy = btstack_min(name_len, DEVICE_NAME_LEN); 1401 // if shorter than DEVICE_NAME_LEN, it's implicitly NULL-terminated by memset call 1402 (void)memcpy(&packet[3], hci_stack->local_name, bytes_to_copy); 1403 // expand '00:00:00:00:00:00' in name with bd_addr 1404 btstack_replace_bd_addr_placeholder(&packet[3], bytes_to_copy, hci_stack->local_bd_addr); 1405 hci_send_cmd_packet(packet, HCI_CMD_HEADER_SIZE + DEVICE_NAME_LEN); 1406 } 1407 1408 static void gap_run_set_eir_data(void){ 1409 hci_reserve_packet_buffer(); 1410 uint8_t * packet = hci_stack->hci_packet_buffer; 1411 // construct HCI Command in-place and send 1412 uint16_t opcode = hci_write_extended_inquiry_response.opcode; 1413 hci_stack->last_cmd_opcode = opcode; 1414 uint16_t offset = 0; 1415 packet[offset++] = opcode & 0xff; 1416 packet[offset++] = opcode >> 8; 1417 packet[offset++] = 1 + EXTENDED_INQUIRY_RESPONSE_DATA_LEN; 1418 packet[offset++] = 0; // FEC not required 1419 memset(&packet[offset], 0, EXTENDED_INQUIRY_RESPONSE_DATA_LEN); 1420 if (hci_stack->eir_data){ 1421 // copy items and expand '00:00:00:00:00:00' in name with bd_addr 1422 ad_context_t context; 1423 for (ad_iterator_init(&context, EXTENDED_INQUIRY_RESPONSE_DATA_LEN, hci_stack->eir_data) ; ad_iterator_has_more(&context) ; ad_iterator_next(&context)) { 1424 uint8_t data_type = ad_iterator_get_data_type(&context); 1425 uint8_t size = ad_iterator_get_data_len(&context); 1426 const uint8_t *data = ad_iterator_get_data(&context); 1427 // copy item 1428 packet[offset++] = size + 1; 1429 packet[offset++] = data_type; 1430 memcpy(&packet[offset], data, size); 1431 // update name item 1432 if ((data_type == BLUETOOTH_DATA_TYPE_SHORTENED_LOCAL_NAME) || (data_type == BLUETOOTH_DATA_TYPE_COMPLETE_LOCAL_NAME)){ 1433 btstack_replace_bd_addr_placeholder(&packet[offset], size, hci_stack->local_bd_addr); 1434 } 1435 offset += size; 1436 } 1437 } else { 1438 uint16_t name_len = (uint16_t) strlen(hci_stack->local_name); 1439 uint16_t bytes_to_copy = btstack_min(name_len, EXTENDED_INQUIRY_RESPONSE_DATA_LEN - 2); 1440 packet[offset++] = bytes_to_copy + 1; 1441 packet[offset++] = BLUETOOTH_DATA_TYPE_COMPLETE_LOCAL_NAME; 1442 (void)memcpy(&packet[6], hci_stack->local_name, bytes_to_copy); 1443 // expand '00:00:00:00:00:00' in name with bd_addr 1444 btstack_replace_bd_addr_placeholder(&packet[offset], bytes_to_copy, hci_stack->local_bd_addr); 1445 } 1446 hci_send_cmd_packet(packet, HCI_CMD_HEADER_SIZE + 1 + EXTENDED_INQUIRY_RESPONSE_DATA_LEN); 1447 } 1448 1449 static void hci_run_gap_tasks_classic(void){ 1450 if ((hci_stack->gap_tasks_classic & GAP_TASK_SET_CLASS_OF_DEVICE) != 0) { 1451 hci_stack->gap_tasks_classic &= ~GAP_TASK_SET_CLASS_OF_DEVICE; 1452 hci_send_cmd(&hci_write_class_of_device, hci_stack->class_of_device); 1453 return; 1454 } 1455 if ((hci_stack->gap_tasks_classic & GAP_TASK_SET_LOCAL_NAME) != 0) { 1456 hci_stack->gap_tasks_classic &= ~GAP_TASK_SET_LOCAL_NAME; 1457 gap_run_set_local_name(); 1458 return; 1459 } 1460 if ((hci_stack->gap_tasks_classic & GAP_TASK_SET_EIR_DATA) != 0) { 1461 hci_stack->gap_tasks_classic &= ~GAP_TASK_SET_EIR_DATA; 1462 gap_run_set_eir_data(); 1463 return; 1464 } 1465 if ((hci_stack->gap_tasks_classic & GAP_TASK_SET_DEFAULT_LINK_POLICY) != 0) { 1466 hci_stack->gap_tasks_classic &= ~GAP_TASK_SET_DEFAULT_LINK_POLICY; 1467 hci_send_cmd(&hci_write_default_link_policy_setting, hci_stack->default_link_policy_settings); 1468 return; 1469 } 1470 // write page scan activity 1471 if ((hci_stack->gap_tasks_classic & GAP_TASK_WRITE_PAGE_SCAN_ACTIVITY) != 0) { 1472 hci_stack->gap_tasks_classic &= ~GAP_TASK_WRITE_PAGE_SCAN_ACTIVITY; 1473 hci_send_cmd(&hci_write_page_scan_activity, hci_stack->new_page_scan_interval, hci_stack->new_page_scan_window); 1474 return; 1475 } 1476 // write page scan type 1477 if ((hci_stack->gap_tasks_classic & GAP_TASK_WRITE_PAGE_SCAN_TYPE) != 0) { 1478 hci_stack->gap_tasks_classic &= ~GAP_TASK_WRITE_PAGE_SCAN_TYPE; 1479 hci_send_cmd(&hci_write_page_scan_type, hci_stack->new_page_scan_type); 1480 return; 1481 } 1482 // write page timeout 1483 if ((hci_stack->gap_tasks_classic & GAP_TASK_WRITE_PAGE_TIMEOUT) != 0) { 1484 hci_stack->gap_tasks_classic &= ~GAP_TASK_WRITE_PAGE_TIMEOUT; 1485 hci_send_cmd(&hci_write_page_timeout, hci_stack->page_timeout); 1486 return; 1487 } 1488 // send scan enable 1489 if ((hci_stack->gap_tasks_classic & GAP_TASK_WRITE_SCAN_ENABLE) != 0) { 1490 hci_stack->gap_tasks_classic &= ~GAP_TASK_WRITE_SCAN_ENABLE; 1491 hci_send_cmd(&hci_write_scan_enable, hci_stack->new_scan_enable_value); 1492 return; 1493 } 1494 // send write scan activity 1495 if ((hci_stack->gap_tasks_classic & GAP_TASK_WRITE_INQUIRY_SCAN_ACTIVITY) != 0) { 1496 hci_stack->gap_tasks_classic &= ~GAP_TASK_WRITE_INQUIRY_SCAN_ACTIVITY; 1497 hci_send_cmd(&hci_write_inquiry_scan_activity, hci_stack->inquiry_scan_interval, hci_stack->inquiry_scan_window); 1498 return; 1499 } 1500 } 1501 #endif 1502 1503 #ifndef HAVE_HOST_CONTROLLER_API 1504 1505 static uint32_t hci_transport_uart_get_main_baud_rate(void){ 1506 if (!hci_stack->config) return 0; 1507 uint32_t baud_rate = ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_main; 1508 // Limit baud rate for Broadcom chipsets to 3 mbps 1509 if ((hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION) && (baud_rate > 3000000)){ 1510 baud_rate = 3000000; 1511 } 1512 return baud_rate; 1513 } 1514 1515 static void hci_initialization_timeout_handler(btstack_timer_source_t * ds){ 1516 UNUSED(ds); 1517 1518 switch (hci_stack->substate){ 1519 case HCI_INIT_W4_SEND_RESET: 1520 log_info("Resend HCI Reset"); 1521 hci_stack->substate = HCI_INIT_SEND_RESET; 1522 hci_stack->num_cmd_packets = 1; 1523 hci_run(); 1524 break; 1525 case HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT_LINK_RESET: 1526 log_info("Resend HCI Reset - CSR Warm Boot with Link Reset"); 1527 if (hci_stack->hci_transport->reset_link){ 1528 hci_stack->hci_transport->reset_link(); 1529 } 1530 1531 /* fall through */ 1532 1533 case HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT: 1534 log_info("Resend HCI Reset - CSR Warm Boot"); 1535 hci_stack->substate = HCI_INIT_SEND_RESET_CSR_WARM_BOOT; 1536 hci_stack->num_cmd_packets = 1; 1537 hci_run(); 1538 break; 1539 case HCI_INIT_W4_SEND_BAUD_CHANGE: 1540 if (hci_stack->hci_transport->set_baudrate){ 1541 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1542 log_info("Local baud rate change to %" PRIu32 "(timeout handler)", baud_rate); 1543 hci_stack->hci_transport->set_baudrate(baud_rate); 1544 } 1545 // For CSR, HCI Reset is sent on new baud rate. Don't forget to reset link for H5/BCSP 1546 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_CAMBRIDGE_SILICON_RADIO){ 1547 if (hci_stack->hci_transport->reset_link){ 1548 log_info("Link Reset"); 1549 hci_stack->hci_transport->reset_link(); 1550 } 1551 hci_stack->substate = HCI_INIT_SEND_RESET_CSR_WARM_BOOT; 1552 hci_run(); 1553 } 1554 break; 1555 case HCI_INIT_W4_CUSTOM_INIT_BCM_DELAY: 1556 // otherwise continue 1557 hci_stack->substate = HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS; 1558 hci_send_cmd(&hci_read_local_supported_commands); 1559 break; 1560 default: 1561 break; 1562 } 1563 } 1564 #endif 1565 1566 static void hci_initializing_next_state(void){ 1567 hci_stack->substate = (hci_substate_t )( ((int) hci_stack->substate) + 1); 1568 } 1569 1570 static void hci_init_done(void){ 1571 // done. tell the app 1572 log_info("hci_init_done -> HCI_STATE_WORKING"); 1573 hci_stack->state = HCI_STATE_WORKING; 1574 hci_emit_state(); 1575 } 1576 1577 // assumption: hci_can_send_command_packet_now() == true 1578 static void hci_initializing_run(void){ 1579 log_debug("hci_initializing_run: substate %u, can send %u", hci_stack->substate, hci_can_send_command_packet_now()); 1580 1581 if (!hci_can_send_command_packet_now()) return; 1582 1583 #ifndef HAVE_HOST_CONTROLLER_API 1584 bool need_baud_change = hci_stack->config 1585 && hci_stack->chipset 1586 && hci_stack->chipset->set_baudrate_command 1587 && hci_stack->hci_transport->set_baudrate 1588 && ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_main; 1589 #endif 1590 1591 switch (hci_stack->substate){ 1592 case HCI_INIT_SEND_RESET: 1593 hci_state_reset(); 1594 1595 #ifndef HAVE_HOST_CONTROLLER_API 1596 // prepare reset if command complete not received in 100ms 1597 btstack_run_loop_set_timer(&hci_stack->timeout, HCI_RESET_RESEND_TIMEOUT_MS); 1598 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_initialization_timeout_handler); 1599 btstack_run_loop_add_timer(&hci_stack->timeout); 1600 #endif 1601 // send command 1602 hci_stack->substate = HCI_INIT_W4_SEND_RESET; 1603 hci_send_cmd(&hci_reset); 1604 break; 1605 case HCI_INIT_SEND_READ_LOCAL_VERSION_INFORMATION: 1606 hci_send_cmd(&hci_read_local_version_information); 1607 hci_stack->substate = HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION; 1608 break; 1609 1610 #ifndef HAVE_HOST_CONTROLLER_API 1611 case HCI_INIT_SEND_READ_LOCAL_NAME: 1612 hci_send_cmd(&hci_read_local_name); 1613 hci_stack->substate = HCI_INIT_W4_SEND_READ_LOCAL_NAME; 1614 break; 1615 case HCI_INIT_SEND_RESET_CSR_WARM_BOOT: 1616 hci_state_reset(); 1617 // prepare reset if command complete not received in 100ms 1618 btstack_run_loop_set_timer(&hci_stack->timeout, HCI_RESET_RESEND_TIMEOUT_MS); 1619 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_initialization_timeout_handler); 1620 btstack_run_loop_add_timer(&hci_stack->timeout); 1621 // send command 1622 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT; 1623 hci_send_cmd(&hci_reset); 1624 break; 1625 case HCI_INIT_SEND_RESET_ST_WARM_BOOT: 1626 hci_state_reset(); 1627 hci_stack->substate = HCI_INIT_W4_SEND_RESET_ST_WARM_BOOT; 1628 hci_send_cmd(&hci_reset); 1629 break; 1630 case HCI_INIT_SEND_BAUD_CHANGE_BCM: { 1631 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1632 hci_stack->chipset->set_baudrate_command(baud_rate, hci_stack->hci_packet_buffer); 1633 hci_stack->last_cmd_opcode = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 1634 hci_stack->substate = HCI_INIT_W4_SEND_BAUD_CHANGE_BCM; 1635 hci_send_cmd_packet(hci_stack->hci_packet_buffer, 3u + hci_stack->hci_packet_buffer[2u]); 1636 break; 1637 } 1638 case HCI_INIT_SET_BD_ADDR: 1639 log_info("Set Public BD ADDR to %s", bd_addr_to_str(hci_stack->custom_bd_addr)); 1640 hci_stack->chipset->set_bd_addr_command(hci_stack->custom_bd_addr, hci_stack->hci_packet_buffer); 1641 hci_stack->last_cmd_opcode = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 1642 hci_stack->substate = HCI_INIT_W4_SET_BD_ADDR; 1643 hci_send_cmd_packet(hci_stack->hci_packet_buffer, 3u + hci_stack->hci_packet_buffer[2u]); 1644 break; 1645 case HCI_INIT_SEND_BAUD_CHANGE: 1646 if (need_baud_change) { 1647 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1648 hci_stack->chipset->set_baudrate_command(baud_rate, hci_stack->hci_packet_buffer); 1649 hci_stack->last_cmd_opcode = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 1650 hci_stack->substate = HCI_INIT_W4_SEND_BAUD_CHANGE; 1651 hci_send_cmd_packet(hci_stack->hci_packet_buffer, 3u + hci_stack->hci_packet_buffer[2u]); 1652 // STLC25000D: baudrate change happens within 0.5 s after command was send, 1653 // use timer to update baud rate after 100 ms (knowing exactly, when command was sent is non-trivial) 1654 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_ST_MICROELECTRONICS){ 1655 btstack_run_loop_set_timer(&hci_stack->timeout, HCI_RESET_RESEND_TIMEOUT_MS); 1656 btstack_run_loop_add_timer(&hci_stack->timeout); 1657 } 1658 break; 1659 } 1660 1661 /* fall through */ 1662 1663 case HCI_INIT_CUSTOM_INIT: 1664 // Custom initialization 1665 if (hci_stack->chipset && hci_stack->chipset->next_command){ 1666 hci_stack->chipset_result = (*hci_stack->chipset->next_command)(hci_stack->hci_packet_buffer); 1667 bool send_cmd = false; 1668 switch (hci_stack->chipset_result){ 1669 case BTSTACK_CHIPSET_VALID_COMMAND: 1670 send_cmd = true; 1671 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT; 1672 break; 1673 case BTSTACK_CHIPSET_WARMSTART_REQUIRED: 1674 send_cmd = true; 1675 // CSR Warm Boot: Wait a bit, then send HCI Reset until HCI Command Complete 1676 log_info("CSR Warm Boot"); 1677 btstack_run_loop_set_timer(&hci_stack->timeout, HCI_RESET_RESEND_TIMEOUT_MS); 1678 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_initialization_timeout_handler); 1679 btstack_run_loop_add_timer(&hci_stack->timeout); 1680 if ((hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_CAMBRIDGE_SILICON_RADIO) 1681 && hci_stack->config 1682 && hci_stack->chipset 1683 // && hci_stack->chipset->set_baudrate_command -- there's no such command 1684 && hci_stack->hci_transport->set_baudrate 1685 && hci_transport_uart_get_main_baud_rate()){ 1686 hci_stack->substate = HCI_INIT_W4_SEND_BAUD_CHANGE; 1687 } else { 1688 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT_LINK_RESET; 1689 } 1690 break; 1691 default: 1692 break; 1693 } 1694 1695 if (send_cmd){ 1696 int size = 3u + hci_stack->hci_packet_buffer[2u]; 1697 hci_stack->last_cmd_opcode = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 1698 hci_dump_packet(HCI_COMMAND_DATA_PACKET, 0, hci_stack->hci_packet_buffer, size); 1699 hci_stack->hci_transport->send_packet(HCI_COMMAND_DATA_PACKET, hci_stack->hci_packet_buffer, size); 1700 break; 1701 } 1702 log_info("Init script done"); 1703 1704 // Init script download on Broadcom chipsets causes: 1705 if ( (hci_stack->chipset_result != BTSTACK_CHIPSET_NO_INIT_SCRIPT) && 1706 ( (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION) 1707 || (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_EM_MICROELECTRONIC_MARIN_SA)) ){ 1708 1709 // - baud rate to reset, restore UART baud rate if needed 1710 if (need_baud_change) { 1711 uint32_t baud_rate = ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_init; 1712 log_info("Local baud rate change to %" PRIu32 " after init script (bcm)", baud_rate); 1713 hci_stack->hci_transport->set_baudrate(baud_rate); 1714 } 1715 1716 uint16_t bcm_delay_ms = 300; 1717 // - UART may or may not be disabled during update and Controller RTS may or may not be high during this time 1718 // -> Work around: wait here. 1719 log_info("BCM delay (%u ms) after init script", bcm_delay_ms); 1720 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT_BCM_DELAY; 1721 btstack_run_loop_set_timer(&hci_stack->timeout, bcm_delay_ms); 1722 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_initialization_timeout_handler); 1723 btstack_run_loop_add_timer(&hci_stack->timeout); 1724 break; 1725 } 1726 } 1727 #endif 1728 /* fall through */ 1729 1730 case HCI_INIT_READ_LOCAL_SUPPORTED_COMMANDS: 1731 hci_stack->substate = HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS; 1732 hci_send_cmd(&hci_read_local_supported_commands); 1733 break; 1734 case HCI_INIT_READ_BD_ADDR: 1735 hci_stack->substate = HCI_INIT_W4_READ_BD_ADDR; 1736 hci_send_cmd(&hci_read_bd_addr); 1737 break; 1738 case HCI_INIT_READ_BUFFER_SIZE: 1739 // only read buffer size if supported 1740 if (hci_command_supported(SUPPORTED_HCI_COMMAND_READ_BUFFER_SIZE)){ 1741 hci_stack->substate = HCI_INIT_W4_READ_BUFFER_SIZE; 1742 hci_send_cmd(&hci_read_buffer_size); 1743 break; 1744 } 1745 1746 /* fall through */ 1747 1748 case HCI_INIT_READ_LOCAL_SUPPORTED_FEATURES: 1749 hci_stack->substate = HCI_INIT_W4_READ_LOCAL_SUPPORTED_FEATURES; 1750 hci_send_cmd(&hci_read_local_supported_features); 1751 break; 1752 1753 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 1754 case HCI_INIT_SET_CONTROLLER_TO_HOST_FLOW_CONTROL: 1755 hci_stack->substate = HCI_INIT_W4_SET_CONTROLLER_TO_HOST_FLOW_CONTROL; 1756 hci_send_cmd(&hci_set_controller_to_host_flow_control, 3); // ACL + SCO Flow Control 1757 break; 1758 case HCI_INIT_HOST_BUFFER_SIZE: 1759 hci_stack->substate = HCI_INIT_W4_HOST_BUFFER_SIZE; 1760 hci_send_cmd(&hci_host_buffer_size, HCI_HOST_ACL_PACKET_LEN, HCI_HOST_SCO_PACKET_LEN, 1761 HCI_HOST_ACL_PACKET_NUM, HCI_HOST_SCO_PACKET_NUM); 1762 break; 1763 #endif 1764 1765 case HCI_INIT_SET_EVENT_MASK: 1766 hci_stack->substate = HCI_INIT_W4_SET_EVENT_MASK; 1767 if (hci_le_supported()){ 1768 hci_send_cmd(&hci_set_event_mask,0xFFFFFFFFU, 0x3FFFFFFFU); 1769 } else { 1770 // Kensington Bluetooth 2.1 USB Dongle (CSR Chipset) returns an error for 0xffff... 1771 hci_send_cmd(&hci_set_event_mask,0xFFFFFFFFU, 0x1FFFFFFFU); 1772 } 1773 break; 1774 1775 #ifdef ENABLE_CLASSIC 1776 case HCI_INIT_WRITE_SIMPLE_PAIRING_MODE: 1777 if (hci_classic_supported() && gap_ssp_supported()){ 1778 hci_stack->substate = HCI_INIT_W4_WRITE_SIMPLE_PAIRING_MODE; 1779 hci_send_cmd(&hci_write_simple_pairing_mode, hci_stack->ssp_enable); 1780 break; 1781 } 1782 1783 /* fall through */ 1784 1785 case HCI_INIT_WRITE_INQUIRY_MODE: 1786 if (hci_classic_supported()){ 1787 hci_stack->substate = HCI_INIT_W4_WRITE_INQUIRY_MODE; 1788 hci_send_cmd(&hci_write_inquiry_mode, (int) hci_stack->inquiry_mode); 1789 break; 1790 } 1791 1792 /* fall through */ 1793 1794 case HCI_INIT_WRITE_SECURE_CONNECTIONS_HOST_ENABLE: 1795 // skip write secure connections host support if not supported or disabled 1796 if (hci_classic_supported() && hci_stack->secure_connections_enable 1797 && hci_command_supported(SUPPORTED_HCI_COMMAND_WRITE_SECURE_CONNECTIONS_HOST)) { 1798 hci_stack->secure_connections_active = true; 1799 hci_stack->substate = HCI_INIT_W4_WRITE_SECURE_CONNECTIONS_HOST_ENABLE; 1800 hci_send_cmd(&hci_write_secure_connections_host_support, 1); 1801 break; 1802 } 1803 1804 #ifdef ENABLE_SCO_OVER_HCI 1805 /* fall through */ 1806 1807 // only sent if ENABLE_SCO_OVER_HCI is defined 1808 case HCI_INIT_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE: 1809 // skip write synchronous flow control if not supported 1810 if (hci_classic_supported() 1811 && hci_command_supported(SUPPORTED_HCI_COMMAND_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE)) { 1812 hci_stack->substate = HCI_INIT_W4_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE; 1813 hci_send_cmd(&hci_write_synchronous_flow_control_enable, 1); // SCO tracking enabled 1814 break; 1815 } 1816 /* fall through */ 1817 1818 case HCI_INIT_WRITE_DEFAULT_ERRONEOUS_DATA_REPORTING: 1819 // skip write default erroneous data reporting if not supported 1820 if (hci_classic_supported() 1821 && hci_command_supported(SUPPORTED_HCI_COMMAND_WRITE_DEFAULT_ERRONEOUS_DATA_REPORTING)) { 1822 hci_stack->substate = HCI_INIT_W4_WRITE_DEFAULT_ERRONEOUS_DATA_REPORTING; 1823 hci_send_cmd(&hci_write_default_erroneous_data_reporting, 1); 1824 break; 1825 } 1826 #endif 1827 1828 #if defined(ENABLE_SCO_OVER_HCI) || defined(ENABLE_SCO_OVER_PCM) 1829 /* fall through */ 1830 1831 // only sent if manufacturer is Broadcom and ENABLE_SCO_OVER_HCI or ENABLE_SCO_OVER_PCM is defined 1832 case HCI_INIT_BCM_WRITE_SCO_PCM_INT: 1833 if (hci_classic_supported() && (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION)){ 1834 hci_stack->substate = HCI_INIT_W4_BCM_WRITE_SCO_PCM_INT; 1835 #ifdef ENABLE_SCO_OVER_HCI 1836 log_info("BCM: Route SCO data via HCI transport"); 1837 hci_send_cmd(&hci_bcm_write_sco_pcm_int, 1, 0, 0, 0, 0); 1838 #endif 1839 #ifdef ENABLE_SCO_OVER_PCM 1840 log_info("BCM: Route SCO data via PCM interface"); 1841 #ifdef ENABLE_BCM_PCM_WBS 1842 // 512 kHz bit clock for 2 channels x 16 bit x 16 kHz 1843 hci_send_cmd(&hci_bcm_write_sco_pcm_int, 0, 2, 0, 1, 1); 1844 #else 1845 // 256 kHz bit clock for 2 channels x 16 bit x 8 kHz 1846 hci_send_cmd(&hci_bcm_write_sco_pcm_int, 0, 1, 0, 1, 1); 1847 #endif 1848 #endif 1849 break; 1850 } 1851 #endif 1852 1853 #ifdef ENABLE_SCO_OVER_PCM 1854 /* fall through */ 1855 1856 case HCI_INIT_BCM_WRITE_I2SPCM_INTERFACE_PARAM: 1857 if (hci_classic_supported() && (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION)){ 1858 hci_stack->substate = HCI_INIT_W4_BCM_WRITE_I2SPCM_INTERFACE_PARAM; 1859 log_info("BCM: Config PCM interface for I2S"); 1860 #ifdef ENABLE_BCM_PCM_WBS 1861 // 512 kHz bit clock for 2 channels x 16 bit x 8 kHz 1862 hci_send_cmd(&hci_bcm_write_i2spcm_interface_param, 1, 1, 0, 2); 1863 #else 1864 // 256 kHz bit clock for 2 channels x 16 bit x 8 kHz 1865 hci_send_cmd(&hci_bcm_write_i2spcm_interface_param, 1, 1, 0, 1); 1866 #endif 1867 break; 1868 } 1869 #endif 1870 #endif 1871 1872 #ifdef ENABLE_BLE 1873 /* fall through */ 1874 1875 // LE INIT 1876 case HCI_INIT_LE_READ_BUFFER_SIZE: 1877 if (hci_le_supported()){ 1878 hci_stack->substate = HCI_INIT_W4_LE_READ_BUFFER_SIZE; 1879 hci_send_cmd(&hci_le_read_buffer_size); 1880 break; 1881 } 1882 1883 /* fall through */ 1884 1885 case HCI_INIT_WRITE_LE_HOST_SUPPORTED: 1886 // skip write le host if not supported (e.g. on LE only EM9301) 1887 if (hci_le_supported() 1888 && hci_command_supported(SUPPORTED_HCI_COMMAND_WRITE_LE_HOST_SUPPORTED)) { 1889 // LE Supported Host = 1, Simultaneous Host = 0 1890 hci_stack->substate = HCI_INIT_W4_WRITE_LE_HOST_SUPPORTED; 1891 hci_send_cmd(&hci_write_le_host_supported, 1, 0); 1892 break; 1893 } 1894 1895 /* fall through */ 1896 1897 case HCI_INIT_LE_SET_EVENT_MASK: 1898 if (hci_le_supported()){ 1899 hci_stack->substate = HCI_INIT_W4_LE_SET_EVENT_MASK; 1900 hci_send_cmd(&hci_le_set_event_mask, 0xfffffdff, 0x07); // all events from core v5.3 without LE Enhanced Connection Complete 1901 break; 1902 } 1903 #endif 1904 1905 #ifdef ENABLE_LE_DATA_LENGTH_EXTENSION 1906 /* fall through */ 1907 1908 case HCI_INIT_LE_READ_MAX_DATA_LENGTH: 1909 if (hci_le_supported() 1910 && hci_command_supported(SUPPORTED_HCI_COMMAND_LE_READ_MAXIMUM_DATA_LENGTH)) { 1911 hci_stack->substate = HCI_INIT_W4_LE_READ_MAX_DATA_LENGTH; 1912 hci_send_cmd(&hci_le_read_maximum_data_length); 1913 break; 1914 } 1915 1916 /* fall through */ 1917 1918 case HCI_INIT_LE_WRITE_SUGGESTED_DATA_LENGTH: 1919 if (hci_le_supported() 1920 && hci_command_supported(SUPPORTED_HCI_COMMAND_LE_WRITE_SUGGESTED_DEFAULT_DATA_LENGTH)) { 1921 hci_stack->substate = HCI_INIT_W4_LE_WRITE_SUGGESTED_DATA_LENGTH; 1922 hci_send_cmd(&hci_le_write_suggested_default_data_length, hci_stack->le_supported_max_tx_octets, hci_stack->le_supported_max_tx_time); 1923 break; 1924 } 1925 #endif 1926 1927 #ifdef ENABLE_LE_CENTRAL 1928 /* fall through */ 1929 1930 case HCI_INIT_READ_WHITE_LIST_SIZE: 1931 if (hci_le_supported()){ 1932 hci_stack->substate = HCI_INIT_W4_READ_WHITE_LIST_SIZE; 1933 hci_send_cmd(&hci_le_read_white_list_size); 1934 break; 1935 } 1936 1937 #endif 1938 1939 #ifdef ENABLE_LE_PERIPHERAL 1940 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 1941 /* fall through */ 1942 1943 case HCI_INIT_LE_READ_MAX_ADV_DATA_LEN: 1944 if (hci_extended_advertising_supported()){ 1945 hci_stack->substate = HCI_INIT_W4_LE_READ_MAX_ADV_DATA_LEN; 1946 hci_send_cmd(&hci_le_read_maximum_advertising_data_length); 1947 break; 1948 } 1949 #endif 1950 #endif 1951 /* fall through */ 1952 1953 case HCI_INIT_DONE: 1954 hci_stack->substate = HCI_INIT_DONE; 1955 // main init sequence complete 1956 #ifdef ENABLE_CLASSIC 1957 // check if initial Classic GAP Tasks are completed 1958 if (hci_classic_supported() && (hci_stack->gap_tasks_classic != 0)) { 1959 hci_run_gap_tasks_classic(); 1960 break; 1961 } 1962 #endif 1963 #ifdef ENABLE_BLE 1964 #ifdef ENABLE_LE_CENTRAL 1965 // check if initial LE GAP Tasks are completed 1966 if (hci_le_supported() && hci_stack->le_scanning_param_update) { 1967 hci_run_general_gap_le(); 1968 break; 1969 } 1970 #endif 1971 #endif 1972 hci_init_done(); 1973 break; 1974 1975 default: 1976 return; 1977 } 1978 } 1979 1980 static bool hci_initializing_event_handler_command_completed(const uint8_t * packet){ 1981 bool command_completed = false; 1982 if (hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_COMPLETE){ 1983 uint16_t opcode = little_endian_read_16(packet,3); 1984 if (opcode == hci_stack->last_cmd_opcode){ 1985 command_completed = true; 1986 log_debug("Command complete for expected opcode %04x at substate %u", opcode, hci_stack->substate); 1987 } else { 1988 log_info("Command complete for different opcode %04x, expected %04x, at substate %u", opcode, hci_stack->last_cmd_opcode, hci_stack->substate); 1989 } 1990 } 1991 1992 if (hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_STATUS){ 1993 uint8_t status = packet[2]; 1994 uint16_t opcode = little_endian_read_16(packet,4); 1995 if (opcode == hci_stack->last_cmd_opcode){ 1996 if (status){ 1997 command_completed = true; 1998 log_debug("Command status error 0x%02x for expected opcode %04x at substate %u", status, opcode, hci_stack->substate); 1999 } else { 2000 log_info("Command status OK for expected opcode %04x, waiting for command complete", opcode); 2001 } 2002 } else { 2003 log_debug("Command status for opcode %04x, expected %04x", opcode, hci_stack->last_cmd_opcode); 2004 } 2005 } 2006 #ifndef HAVE_HOST_CONTROLLER_API 2007 // Vendor == CSR 2008 if ((hci_stack->substate == HCI_INIT_W4_CUSTOM_INIT) && (hci_event_packet_get_type(packet) == HCI_EVENT_VENDOR_SPECIFIC)){ 2009 // TODO: track actual command 2010 command_completed = true; 2011 } 2012 2013 // Vendor == Toshiba 2014 if ((hci_stack->substate == HCI_INIT_W4_SEND_BAUD_CHANGE) && (hci_event_packet_get_type(packet) == HCI_EVENT_VENDOR_SPECIFIC)){ 2015 // TODO: track actual command 2016 command_completed = true; 2017 // Fix: no HCI Command Complete received, so num_cmd_packets not reset 2018 hci_stack->num_cmd_packets = 1; 2019 } 2020 #endif 2021 2022 return command_completed; 2023 } 2024 2025 static void hci_initializing_event_handler(const uint8_t * packet, uint16_t size){ 2026 2027 UNUSED(size); // ok: less than 6 bytes are read from our buffer 2028 2029 bool command_completed = hci_initializing_event_handler_command_completed(packet); 2030 2031 #ifndef HAVE_HOST_CONTROLLER_API 2032 2033 // Late response (> 100 ms) for HCI Reset e.g. on Toshiba TC35661: 2034 // Command complete for HCI Reset arrives after we've resent the HCI Reset command 2035 // 2036 // HCI Reset 2037 // Timeout 100 ms 2038 // HCI Reset 2039 // Command Complete Reset 2040 // HCI Read Local Version Information 2041 // Command Complete Reset - but we expected Command Complete Read Local Version Information 2042 // hang... 2043 // 2044 // Fix: Command Complete for HCI Reset in HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION trigger resend 2045 if (!command_completed 2046 && (hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_COMPLETE) 2047 && (hci_stack->substate == HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION)){ 2048 2049 uint16_t opcode = little_endian_read_16(packet,3); 2050 if (opcode == hci_reset.opcode){ 2051 hci_stack->substate = HCI_INIT_SEND_READ_LOCAL_VERSION_INFORMATION; 2052 return; 2053 } 2054 } 2055 2056 // CSR & H5 2057 // Fix: Command Complete for HCI Reset in HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION trigger resend 2058 if (!command_completed 2059 && (hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_COMPLETE) 2060 && (hci_stack->substate == HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS)){ 2061 2062 uint16_t opcode = little_endian_read_16(packet,3); 2063 if (opcode == hci_reset.opcode){ 2064 hci_stack->substate = HCI_INIT_READ_LOCAL_SUPPORTED_COMMANDS; 2065 return; 2066 } 2067 } 2068 2069 // on CSR with BCSP/H5, the reset resend timeout leads to substate == HCI_INIT_SEND_RESET or HCI_INIT_SEND_RESET_CSR_WARM_BOOT 2070 // fix: Correct substate and behave as command below 2071 if (command_completed){ 2072 switch (hci_stack->substate){ 2073 case HCI_INIT_SEND_RESET: 2074 hci_stack->substate = HCI_INIT_W4_SEND_RESET; 2075 break; 2076 case HCI_INIT_SEND_RESET_CSR_WARM_BOOT: 2077 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT; 2078 break; 2079 default: 2080 break; 2081 } 2082 } 2083 2084 #endif 2085 2086 if (!command_completed) return; 2087 2088 bool need_baud_change = false; 2089 bool need_addr_change = false; 2090 2091 #ifndef HAVE_HOST_CONTROLLER_API 2092 need_baud_change = hci_stack->config 2093 && hci_stack->chipset 2094 && hci_stack->chipset->set_baudrate_command 2095 && hci_stack->hci_transport->set_baudrate 2096 && ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_main; 2097 2098 need_addr_change = hci_stack->custom_bd_addr_set 2099 && hci_stack->chipset 2100 && hci_stack->chipset->set_bd_addr_command; 2101 #endif 2102 2103 switch(hci_stack->substate){ 2104 2105 #ifndef HAVE_HOST_CONTROLLER_API 2106 case HCI_INIT_SEND_RESET: 2107 // on CSR with BCSP/H5, resend triggers resend of HCI Reset and leads to substate == HCI_INIT_SEND_RESET 2108 // fix: just correct substate and behave as command below 2109 2110 /* fall through */ 2111 #endif 2112 2113 case HCI_INIT_W4_SEND_RESET: 2114 btstack_run_loop_remove_timer(&hci_stack->timeout); 2115 hci_stack->substate = HCI_INIT_SEND_READ_LOCAL_VERSION_INFORMATION; 2116 return; 2117 2118 #ifndef HAVE_HOST_CONTROLLER_API 2119 case HCI_INIT_W4_SEND_BAUD_CHANGE: 2120 // for STLC2500D, baud rate change already happened. 2121 // for others, baud rate gets changed now 2122 if ((hci_stack->manufacturer != BLUETOOTH_COMPANY_ID_ST_MICROELECTRONICS) && need_baud_change){ 2123 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 2124 log_info("Local baud rate change to %" PRIu32 "(w4_send_baud_change)", baud_rate); 2125 hci_stack->hci_transport->set_baudrate(baud_rate); 2126 } 2127 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 2128 return; 2129 case HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT: 2130 btstack_run_loop_remove_timer(&hci_stack->timeout); 2131 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 2132 return; 2133 case HCI_INIT_W4_CUSTOM_INIT: 2134 // repeat custom init 2135 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 2136 return; 2137 #endif 2138 2139 case HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS: 2140 if (need_baud_change && (hci_stack->chipset_result != BTSTACK_CHIPSET_NO_INIT_SCRIPT) && 2141 ((hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION) || 2142 (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_EM_MICROELECTRONIC_MARIN_SA))) { 2143 hci_stack->substate = HCI_INIT_SEND_BAUD_CHANGE_BCM; 2144 return; 2145 } 2146 if (need_addr_change){ 2147 hci_stack->substate = HCI_INIT_SET_BD_ADDR; 2148 return; 2149 } 2150 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 2151 return; 2152 #ifndef HAVE_HOST_CONTROLLER_API 2153 case HCI_INIT_W4_SEND_BAUD_CHANGE_BCM: 2154 if (need_baud_change){ 2155 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 2156 log_info("Local baud rate change to %" PRIu32 "(w4_send_baud_change_bcm))", baud_rate); 2157 hci_stack->hci_transport->set_baudrate(baud_rate); 2158 } 2159 if (need_addr_change){ 2160 hci_stack->substate = HCI_INIT_SET_BD_ADDR; 2161 return; 2162 } 2163 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 2164 return; 2165 case HCI_INIT_W4_SET_BD_ADDR: 2166 // for STLC2500D + ATWILC3000, bd addr change only gets active after sending reset command 2167 if ((hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_ST_MICROELECTRONICS) 2168 || (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_ATMEL_CORPORATION)){ 2169 hci_stack->substate = HCI_INIT_SEND_RESET_ST_WARM_BOOT; 2170 return; 2171 } 2172 // skipping st warm boot 2173 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 2174 return; 2175 case HCI_INIT_W4_SEND_RESET_ST_WARM_BOOT: 2176 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 2177 return; 2178 #endif 2179 2180 case HCI_INIT_DONE: 2181 // set state if we came here by fall through 2182 hci_stack->substate = HCI_INIT_DONE; 2183 return; 2184 2185 default: 2186 break; 2187 } 2188 hci_initializing_next_state(); 2189 } 2190 2191 static void hci_handle_connection_failed(hci_connection_t * conn, uint8_t status){ 2192 // CC2564C might emit Connection Complete for rejected incoming SCO connection 2193 // To prevent accidentally free'ing the CHI connection for the ACL connection, 2194 // check if the hci connection has been outgoing 2195 switch (conn->state){ 2196 case SEND_CREATE_CONNECTION: 2197 case RECEIVED_CONNECTION_REQUEST: 2198 break; 2199 default: 2200 return; 2201 } 2202 2203 log_info("Outgoing connection to %s failed", bd_addr_to_str(conn->address)); 2204 bd_addr_t bd_address; 2205 (void)memcpy(&bd_address, conn->address, 6); 2206 2207 #ifdef ENABLE_CLASSIC 2208 // cache needed data 2209 int notify_dedicated_bonding_failed = conn->bonding_flags & BONDING_DEDICATED; 2210 #endif 2211 2212 // connection failed, remove entry 2213 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 2214 btstack_memory_hci_connection_free( conn ); 2215 2216 #ifdef ENABLE_CLASSIC 2217 // notify client if dedicated bonding 2218 if (notify_dedicated_bonding_failed){ 2219 log_info("hci notify_dedicated_bonding_failed"); 2220 hci_emit_dedicated_bonding_result(bd_address, status); 2221 } 2222 2223 // if authentication error, also delete link key 2224 if (status == ERROR_CODE_AUTHENTICATION_FAILURE) { 2225 gap_drop_link_key_for_bd_addr(bd_address); 2226 } 2227 #else 2228 UNUSED(status); 2229 #endif 2230 } 2231 2232 #ifdef ENABLE_CLASSIC 2233 static void hci_handle_remote_features_page_0(hci_connection_t * conn, const uint8_t * features){ 2234 // SSP Controller 2235 if (features[6] & (1 << 3)){ 2236 conn->bonding_flags |= BONDING_REMOTE_SUPPORTS_SSP_CONTROLLER; 2237 } 2238 // eSCO 2239 if (features[3] & (1<<7)){ 2240 conn->remote_supported_features[0] |= 1; 2241 } 2242 // Extended features 2243 if (features[7] & (1<<7)){ 2244 conn->remote_supported_features[0] |= 2; 2245 } 2246 } 2247 2248 static void hci_handle_remote_features_page_1(hci_connection_t * conn, const uint8_t * features){ 2249 // SSP Host 2250 if (features[0] & (1 << 0)){ 2251 conn->bonding_flags |= BONDING_REMOTE_SUPPORTS_SSP_HOST; 2252 } 2253 // SC Host 2254 if (features[0] & (1 << 3)){ 2255 conn->bonding_flags |= BONDING_REMOTE_SUPPORTS_SC_HOST; 2256 } 2257 } 2258 2259 static void hci_handle_remote_features_page_2(hci_connection_t * conn, const uint8_t * features){ 2260 // SC Controller 2261 if (features[1] & (1 << 0)){ 2262 conn->bonding_flags |= BONDING_REMOTE_SUPPORTS_SC_CONTROLLER; 2263 } 2264 } 2265 2266 static void hci_handle_remote_features_received(hci_connection_t * conn){ 2267 conn->bonding_flags &= ~BONDING_REMOTE_FEATURES_QUERY_ACTIVE; 2268 conn->bonding_flags |= BONDING_RECEIVED_REMOTE_FEATURES; 2269 log_info("Remote features %02x, bonding flags %x", conn->remote_supported_features[0], conn->bonding_flags); 2270 if (conn->bonding_flags & BONDING_DEDICATED){ 2271 conn->bonding_flags |= BONDING_SEND_AUTHENTICATE_REQUEST; 2272 } 2273 } 2274 static bool hci_remote_sc_enabled(hci_connection_t * connection){ 2275 const uint16_t sc_enabled_mask = BONDING_REMOTE_SUPPORTS_SC_HOST | BONDING_REMOTE_SUPPORTS_SC_CONTROLLER; 2276 return (connection->bonding_flags & sc_enabled_mask) == sc_enabled_mask; 2277 } 2278 2279 #endif 2280 2281 static void handle_event_for_current_stack_state(const uint8_t * packet, uint16_t size) { 2282 // handle BT initialization 2283 if (hci_stack->state == HCI_STATE_INITIALIZING) { 2284 hci_initializing_event_handler(packet, size); 2285 } 2286 2287 // help with BT sleep 2288 if ((hci_stack->state == HCI_STATE_FALLING_ASLEEP) 2289 && (hci_stack->substate == HCI_FALLING_ASLEEP_W4_WRITE_SCAN_ENABLE) 2290 && (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_write_scan_enable))) { 2291 hci_initializing_next_state(); 2292 } 2293 } 2294 2295 #ifdef ENABLE_CLASSIC 2296 static void hci_handle_read_encryption_key_size_complete(hci_connection_t * conn, uint8_t encryption_key_size) { 2297 conn->authentication_flags |= AUTH_FLAG_CONNECTION_ENCRYPTED; 2298 conn->encryption_key_size = encryption_key_size; 2299 2300 if ((conn->authentication_flags & AUTH_FLAG_CONNECTION_AUTHENTICATED) != 0) { 2301 conn->requested_security_level = LEVEL_0; 2302 hci_emit_security_level(conn->con_handle, gap_security_level_for_connection(conn)); 2303 return; 2304 } 2305 2306 // Request remote features if not already done 2307 hci_trigger_remote_features_for_connection(conn); 2308 2309 // Request Authentication if not already done 2310 if ((conn->bonding_flags & BONDING_SENT_AUTHENTICATE_REQUEST) != 0) return; 2311 conn->bonding_flags |= BONDING_SEND_AUTHENTICATE_REQUEST; 2312 } 2313 #endif 2314 2315 static void hci_store_local_supported_commands(const uint8_t * packet){ 2316 // create mapping table 2317 #define X(name, offset, bit) { offset, bit }, 2318 static struct { 2319 uint8_t byte_offset; 2320 uint8_t bit_position; 2321 } supported_hci_commands_map [] = { 2322 SUPPORTED_HCI_COMMANDS 2323 }; 2324 #undef X 2325 2326 // create names for debug purposes 2327 #ifdef ENABLE_LOG_DEBUG 2328 #define X(name, offset, bit) #name, 2329 static const char * command_names[] = { 2330 SUPPORTED_HCI_COMMANDS 2331 }; 2332 #undef X 2333 #endif 2334 2335 hci_stack->local_supported_commands = 0; 2336 const uint8_t * commands_map = &packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1]; 2337 uint16_t i; 2338 for (i = 0 ; i < SUPPORTED_HCI_COMMANDS_COUNT ; i++){ 2339 if ((commands_map[supported_hci_commands_map[i].byte_offset] & (1 << supported_hci_commands_map[i].bit_position)) != 0){ 2340 #ifdef ENABLE_LOG_DEBUG 2341 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); 2342 #else 2343 log_info("Command 0x%02x supported %u/%u", i, supported_hci_commands_map[i].byte_offset, supported_hci_commands_map[i].bit_position); 2344 #endif 2345 hci_stack->local_supported_commands |= (1LU << i); 2346 } 2347 } 2348 log_info("Local supported commands summary %04x", hci_stack->local_supported_commands); 2349 } 2350 2351 static void handle_command_complete_event(uint8_t * packet, uint16_t size){ 2352 UNUSED(size); 2353 2354 uint16_t manufacturer; 2355 #ifdef ENABLE_CLASSIC 2356 hci_con_handle_t handle; 2357 hci_connection_t * conn; 2358 uint8_t status; 2359 #endif 2360 // get num cmd packets - limit to 1 to reduce complexity 2361 hci_stack->num_cmd_packets = packet[2] ? 1 : 0; 2362 2363 uint16_t opcode = hci_event_command_complete_get_command_opcode(packet); 2364 switch (opcode){ 2365 case HCI_OPCODE_HCI_READ_LOCAL_NAME: 2366 if (packet[5]) break; 2367 // terminate, name 248 chars 2368 packet[6+248] = 0; 2369 log_info("local name: %s", &packet[6]); 2370 break; 2371 case HCI_OPCODE_HCI_READ_BUFFER_SIZE: 2372 // "The HC_ACL_Data_Packet_Length return parameter will be used to determine the size of the L2CAP segments contained in ACL Data Packets" 2373 if (hci_stack->state == HCI_STATE_INITIALIZING) { 2374 uint16_t acl_len = little_endian_read_16(packet, 6); 2375 uint16_t sco_len = packet[8]; 2376 2377 // determine usable ACL/SCO payload size 2378 hci_stack->acl_data_packet_length = btstack_min(acl_len, HCI_ACL_PAYLOAD_SIZE); 2379 hci_stack->sco_data_packet_length = btstack_min(sco_len, HCI_ACL_PAYLOAD_SIZE); 2380 2381 hci_stack->acl_packets_total_num = little_endian_read_16(packet, 9); 2382 hci_stack->sco_packets_total_num = little_endian_read_16(packet, 11); 2383 2384 log_info("hci_read_buffer_size: ACL size module %u -> used %u, count %u / SCO size %u, count %u", 2385 acl_len, hci_stack->acl_data_packet_length, hci_stack->acl_packets_total_num, 2386 hci_stack->sco_data_packet_length, hci_stack->sco_packets_total_num); 2387 } 2388 break; 2389 case HCI_OPCODE_HCI_READ_RSSI: 2390 if (packet[5] == ERROR_CODE_SUCCESS){ 2391 uint8_t event[5]; 2392 event[0] = GAP_EVENT_RSSI_MEASUREMENT; 2393 event[1] = 3; 2394 (void)memcpy(&event[2], &packet[6], 3); 2395 hci_emit_event(event, sizeof(event), 1); 2396 } 2397 break; 2398 #ifdef ENABLE_BLE 2399 case HCI_OPCODE_HCI_LE_READ_BUFFER_SIZE: 2400 hci_stack->le_data_packets_length = little_endian_read_16(packet, 6); 2401 hci_stack->le_acl_packets_total_num = packet[8]; 2402 // determine usable ACL payload size 2403 if (HCI_ACL_PAYLOAD_SIZE < hci_stack->le_data_packets_length){ 2404 hci_stack->le_data_packets_length = HCI_ACL_PAYLOAD_SIZE; 2405 } 2406 log_info("hci_le_read_buffer_size: size %u, count %u", hci_stack->le_data_packets_length, hci_stack->le_acl_packets_total_num); 2407 break; 2408 #endif 2409 #ifdef ENABLE_LE_DATA_LENGTH_EXTENSION 2410 case HCI_OPCODE_HCI_LE_READ_MAXIMUM_DATA_LENGTH: 2411 hci_stack->le_supported_max_tx_octets = little_endian_read_16(packet, 6); 2412 hci_stack->le_supported_max_tx_time = little_endian_read_16(packet, 8); 2413 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); 2414 break; 2415 #endif 2416 #ifdef ENABLE_LE_CENTRAL 2417 case HCI_OPCODE_HCI_LE_READ_WHITE_LIST_SIZE: 2418 hci_stack->le_whitelist_capacity = packet[6]; 2419 log_info("hci_le_read_white_list_size: size %u", hci_stack->le_whitelist_capacity); 2420 break; 2421 #endif 2422 #ifdef ENABLE_LE_PERIPHERAL 2423 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 2424 case HCI_OPCODE_HCI_LE_READ_MAXIMUM_ADVERTISING_DATA_LENGTH: 2425 hci_stack->le_maximum_advertising_data_length = little_endian_read_16(packet, 6); 2426 break; 2427 case HCI_OPCODE_HCI_LE_SET_EXTENDED_ADVERTISING_PARAMETERS: 2428 if (hci_stack->le_advertising_set_in_current_command != 0) { 2429 le_advertising_set_t * advertising_set = hci_advertising_set_for_handle(hci_stack->le_advertising_set_in_current_command); 2430 hci_stack->le_advertising_set_in_current_command = 0; 2431 if (advertising_set == NULL) break; 2432 uint8_t adv_status = packet[6]; 2433 uint8_t tx_power = packet[7]; 2434 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 }; 2435 if (adv_status == 0){ 2436 advertising_set->state |= LE_ADVERTISEMENT_STATE_PARAMS_SET; 2437 } 2438 hci_emit_event(event, sizeof(event), 1); 2439 } 2440 break; 2441 case HCI_OPCODE_HCI_LE_REMOVE_ADVERTISING_SET: 2442 if (hci_stack->le_advertising_set_in_current_command != 0) { 2443 le_advertising_set_t * advertising_set = hci_advertising_set_for_handle(hci_stack->le_advertising_set_in_current_command); 2444 hci_stack->le_advertising_set_in_current_command = 0; 2445 if (advertising_set == NULL) break; 2446 uint8_t adv_status = packet[5]; 2447 uint8_t event[] = { HCI_EVENT_META_GAP, 3, GAP_SUBEVENT_ADVERTISING_SET_REMOVED, hci_stack->le_advertising_set_in_current_command, adv_status }; 2448 if (adv_status == 0){ 2449 btstack_linked_list_remove(&hci_stack->le_advertising_sets, (btstack_linked_item_t *) advertising_set); 2450 } 2451 hci_emit_event(event, sizeof(event), 1); 2452 } 2453 break; 2454 #endif 2455 #endif 2456 case HCI_OPCODE_HCI_READ_BD_ADDR: 2457 reverse_bd_addr(&packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE + 1], hci_stack->local_bd_addr); 2458 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)); 2459 #ifdef ENABLE_CLASSIC 2460 if (hci_stack->link_key_db){ 2461 hci_stack->link_key_db->set_local_bd_addr(hci_stack->local_bd_addr); 2462 } 2463 #endif 2464 break; 2465 #ifdef ENABLE_CLASSIC 2466 case HCI_OPCODE_HCI_WRITE_SCAN_ENABLE: 2467 hci_emit_discoverable_enabled(hci_stack->discoverable); 2468 break; 2469 case HCI_OPCODE_HCI_INQUIRY_CANCEL: 2470 if (hci_stack->inquiry_state == GAP_INQUIRY_STATE_W4_CANCELLED){ 2471 hci_stack->inquiry_state = GAP_INQUIRY_STATE_IDLE; 2472 uint8_t event[] = { GAP_EVENT_INQUIRY_COMPLETE, 1, 0}; 2473 hci_emit_event(event, sizeof(event), 1); 2474 } 2475 break; 2476 #endif 2477 case HCI_OPCODE_HCI_READ_LOCAL_SUPPORTED_FEATURES: 2478 (void)memcpy(hci_stack->local_supported_features, &packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE + 1], 8); 2479 2480 #ifdef ENABLE_CLASSIC 2481 // determine usable ACL packet types based on host buffer size and supported features 2482 hci_stack->packet_types = hci_acl_packet_types_for_buffer_size_and_local_features(HCI_ACL_PAYLOAD_SIZE, &hci_stack->local_supported_features[0]); 2483 log_info("Packet types %04x, eSCO %u", hci_stack->packet_types, hci_extended_sco_link_supported()); 2484 #endif 2485 // Classic/LE 2486 log_info("BR/EDR support %u, LE support %u", hci_classic_supported(), hci_le_supported()); 2487 break; 2488 case HCI_OPCODE_HCI_READ_LOCAL_VERSION_INFORMATION: 2489 manufacturer = little_endian_read_16(packet, 10); 2490 // map Cypress to Broadcom 2491 if (manufacturer == BLUETOOTH_COMPANY_ID_CYPRESS_SEMICONDUCTOR){ 2492 log_info("Treat Cypress as Broadcom"); 2493 manufacturer = BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION; 2494 little_endian_store_16(packet, 10, manufacturer); 2495 } 2496 hci_stack->manufacturer = manufacturer; 2497 log_info("Manufacturer: 0x%04x", hci_stack->manufacturer); 2498 break; 2499 case HCI_OPCODE_HCI_READ_LOCAL_SUPPORTED_COMMANDS: 2500 hci_store_local_supported_commands(packet); 2501 break; 2502 #ifdef ENABLE_CLASSIC 2503 case HCI_OPCODE_HCI_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE: 2504 if (packet[5]) return; 2505 hci_stack->synchronous_flow_control_enabled = 1; 2506 break; 2507 case HCI_OPCODE_HCI_READ_ENCRYPTION_KEY_SIZE: 2508 status = packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE]; 2509 handle = little_endian_read_16(packet, OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1); 2510 conn = hci_connection_for_handle(handle); 2511 if (conn != NULL) { 2512 uint8_t key_size = 0; 2513 if (status == 0){ 2514 key_size = packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+3]; 2515 log_info("Handle %04x key Size: %u", handle, key_size); 2516 } else { 2517 key_size = 1; 2518 log_info("Read Encryption Key Size failed 0x%02x-> assuming insecure connection with key size of 1", status); 2519 } 2520 hci_handle_read_encryption_key_size_complete(conn, key_size); 2521 } 2522 break; 2523 // assert pairing complete event is emitted. 2524 // note: for SSP, Simple Pairing Complete Event is sufficient, but we want to be more robust 2525 case HCI_OPCODE_HCI_PIN_CODE_REQUEST_NEGATIVE_REPLY: 2526 case HCI_OPCODE_HCI_USER_PASSKEY_REQUEST_NEGATIVE_REPLY: 2527 case HCI_OPCODE_HCI_USER_CONFIRMATION_REQUEST_NEGATIVE_REPLY: 2528 hci_stack->gap_pairing_state = GAP_PAIRING_STATE_IDLE; 2529 // lookup connection by gap pairing addr 2530 conn = hci_connection_for_bd_addr_and_type(hci_stack->gap_pairing_addr, BD_ADDR_TYPE_ACL); 2531 if (conn == NULL) break; 2532 hci_pairing_complete(conn, ERROR_CODE_AUTHENTICATION_FAILURE); 2533 break; 2534 2535 #ifdef ENABLE_CLASSIC_PAIRING_OOB 2536 case HCI_OPCODE_HCI_READ_LOCAL_OOB_DATA: 2537 case HCI_OPCODE_HCI_READ_LOCAL_EXTENDED_OOB_DATA:{ 2538 uint8_t event[67]; 2539 event[0] = GAP_EVENT_LOCAL_OOB_DATA; 2540 event[1] = 65; 2541 (void)memset(&event[2], 0, 65); 2542 if (packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE] == ERROR_CODE_SUCCESS){ 2543 (void)memcpy(&event[3], &packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1], 32); 2544 if (opcode == HCI_OPCODE_HCI_READ_LOCAL_EXTENDED_OOB_DATA){ 2545 event[2] = 3; 2546 (void)memcpy(&event[35], &packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+33], 32); 2547 } else { 2548 event[2] = 1; 2549 } 2550 } 2551 hci_emit_event(event, sizeof(event), 0); 2552 break; 2553 } 2554 2555 // note: only needed if user does not provide OOB data 2556 case HCI_OPCODE_HCI_REMOTE_OOB_DATA_REQUEST_NEGATIVE_REPLY: 2557 conn = hci_connection_for_handle(hci_stack->classic_oob_con_handle); 2558 hci_stack->classic_oob_con_handle = HCI_CON_HANDLE_INVALID; 2559 if (conn == NULL) break; 2560 hci_pairing_complete(conn, ERROR_CODE_AUTHENTICATION_FAILURE); 2561 break; 2562 #endif 2563 #endif 2564 default: 2565 break; 2566 } 2567 } 2568 2569 #ifdef ENABLE_BLE 2570 static void event_handle_le_connection_complete(const uint8_t * packet){ 2571 bd_addr_t addr; 2572 bd_addr_type_t addr_type; 2573 hci_connection_t * conn; 2574 2575 // Connection management 2576 reverse_bd_addr(&packet[8], addr); 2577 addr_type = (bd_addr_type_t)packet[7]; 2578 log_info("LE Connection_complete (status=%u) type %u, %s", packet[3], addr_type, bd_addr_to_str(addr)); 2579 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 2580 2581 #ifdef ENABLE_LE_CENTRAL 2582 // handle error: error is reported only to the initiator -> outgoing connection 2583 if (packet[3]){ 2584 2585 // handle cancelled outgoing connection 2586 // "If the cancellation was successful then, after the Command Complete event for the LE_Create_Connection_Cancel command, 2587 // either an LE Connection Complete or an LE Enhanced Connection Complete event shall be generated. 2588 // In either case, the event shall be sent with the error code Unknown Connection Identifier (0x02)." 2589 if (packet[3] == ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER){ 2590 // reset state 2591 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 2592 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 2593 // get outgoing connection conn struct for direct connect 2594 conn = gap_get_outgoing_connection(); 2595 } 2596 2597 // outgoing le connection establishment is done 2598 if (conn){ 2599 // remove entry 2600 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 2601 btstack_memory_hci_connection_free( conn ); 2602 } 2603 return; 2604 } 2605 #endif 2606 2607 // on success, both hosts receive connection complete event 2608 if (packet[6] == HCI_ROLE_MASTER){ 2609 #ifdef ENABLE_LE_CENTRAL 2610 // if we're master on an le connection, it was an outgoing connection and we're done with it 2611 // note: no hci_connection_t object exists yet for connect with whitelist 2612 if (hci_is_le_connection_type(addr_type)){ 2613 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 2614 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 2615 } 2616 #endif 2617 } else { 2618 #ifdef ENABLE_LE_PERIPHERAL 2619 // if we're slave, it was an incoming connection, advertisements have stopped 2620 hci_stack->le_advertisements_state &= ~LE_ADVERTISEMENT_STATE_ACTIVE; 2621 #endif 2622 } 2623 2624 // LE connections are auto-accepted, so just create a connection if there isn't one already 2625 if (!conn){ 2626 conn = create_connection_for_bd_addr_and_type(addr, addr_type); 2627 } 2628 2629 // no memory, sorry. 2630 if (!conn){ 2631 return; 2632 } 2633 2634 conn->state = OPEN; 2635 conn->role = packet[6]; 2636 conn->con_handle = hci_subevent_le_connection_complete_get_connection_handle(packet); 2637 conn->le_connection_interval = hci_subevent_le_connection_complete_get_conn_interval(packet); 2638 2639 #ifdef ENABLE_LE_PERIPHERAL 2640 if (packet[6] == HCI_ROLE_SLAVE){ 2641 hci_update_advertisements_enabled_for_current_roles(); 2642 } 2643 #endif 2644 2645 // init unenhanced att bearer mtu 2646 conn->att_connection.mtu = ATT_DEFAULT_MTU; 2647 conn->att_connection.mtu_exchanged = false; 2648 2649 // TODO: store - role, peer address type, conn_interval, conn_latency, supervision timeout, master clock 2650 2651 // restart timer 2652 // btstack_run_loop_set_timer(&conn->timeout, HCI_CONNECTION_TIMEOUT_MS); 2653 // btstack_run_loop_add_timer(&conn->timeout); 2654 2655 log_info("New connection: handle %u, %s", conn->con_handle, bd_addr_to_str(conn->address)); 2656 2657 hci_emit_nr_connections_changed(); 2658 } 2659 #endif 2660 2661 #ifdef ENABLE_CLASSIC 2662 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){ 2663 if (io_cap_local == SSP_IO_CAPABILITY_UNKNOWN) return false; 2664 // LEVEL_4 is tested by l2cap 2665 // LEVEL 3 requires MITM protection -> check io capabilities if Authenticated is possible 2666 // @see: Core Spec v5.3, Vol 3, Part C, Table 5.7 2667 if (level >= LEVEL_3){ 2668 // MITM not possible without keyboard or display 2669 if (io_cap_remote >= SSP_IO_CAPABILITY_NO_INPUT_NO_OUTPUT) return false; 2670 if (io_cap_local >= SSP_IO_CAPABILITY_NO_INPUT_NO_OUTPUT) return false; 2671 2672 // MITM possible if one side has keyboard and the other has keyboard or display 2673 if (io_cap_remote == SSP_IO_CAPABILITY_KEYBOARD_ONLY) return true; 2674 if (io_cap_local == SSP_IO_CAPABILITY_KEYBOARD_ONLY) return true; 2675 2676 // MITM not possible if one side has only display and other side has no keyboard 2677 if (io_cap_remote == SSP_IO_CAPABILITY_DISPLAY_ONLY) return false; 2678 if (io_cap_local == SSP_IO_CAPABILITY_DISPLAY_ONLY) return false; 2679 } 2680 // LEVEL 2 requires SSP, which is a given 2681 return true; 2682 } 2683 2684 static bool btstack_is_null(uint8_t * data, uint16_t size){ 2685 uint16_t i; 2686 for (i=0; i < size ; i++){ 2687 if (data[i] != 0) { 2688 return false; 2689 } 2690 } 2691 return true; 2692 } 2693 2694 static void hci_ssp_assess_security_on_io_cap_request(hci_connection_t * conn){ 2695 // get requested security level 2696 gap_security_level_t requested_security_level = conn->requested_security_level; 2697 if (hci_stack->gap_secure_connections_only_mode){ 2698 requested_security_level = LEVEL_4; 2699 } 2700 2701 // assess security: LEVEL 4 requires SC 2702 // skip this preliminary test if remote features are not available yet to work around potential issue in ESP32 controller 2703 if ((requested_security_level == LEVEL_4) && 2704 ((conn->bonding_flags & BONDING_RECEIVED_REMOTE_FEATURES) != 0) && 2705 !hci_remote_sc_enabled(conn)){ 2706 log_info("Level 4 required, but SC not supported -> abort"); 2707 hci_pairing_complete(conn, ERROR_CODE_INSUFFICIENT_SECURITY); 2708 connectionSetAuthenticationFlags(conn, AUTH_FLAG_SEND_IO_CAPABILITIES_NEGATIVE_REPLY); 2709 return; 2710 } 2711 2712 // assess security based on io capabilities 2713 if (conn->authentication_flags & AUTH_FLAG_RECV_IO_CAPABILITIES_RESPONSE){ 2714 // responder: fully validate io caps of both sides as well as OOB data 2715 bool security_possible = false; 2716 security_possible = hci_ssp_security_level_possible_for_io_cap(requested_security_level, hci_stack->ssp_io_capability, conn->io_cap_response_io); 2717 2718 #ifdef ENABLE_CLASSIC_PAIRING_OOB 2719 // We assume that both Controller can reach LEVEL 4, if one side has received P-192 and the other has received P-256, 2720 // so we merge the OOB data availability 2721 uint8_t have_oob_data = conn->io_cap_response_oob_data; 2722 if (conn->classic_oob_c_192 != NULL){ 2723 have_oob_data |= 1; 2724 } 2725 if (conn->classic_oob_c_256 != NULL){ 2726 have_oob_data |= 2; 2727 } 2728 // for up to Level 3, either P-192 as well as P-256 will do 2729 // 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 2730 // if remote does not SC, we should not receive P-256 data either 2731 if ((requested_security_level <= LEVEL_3) && (have_oob_data != 0)){ 2732 security_possible = true; 2733 } 2734 // for Level 4, P-256 is needed 2735 if ((requested_security_level == LEVEL_4 && ((have_oob_data & 2) != 0))){ 2736 security_possible = true; 2737 } 2738 #endif 2739 2740 if (security_possible == false){ 2741 log_info("IOCap/OOB insufficient for level %u -> abort", requested_security_level); 2742 hci_pairing_complete(conn, ERROR_CODE_INSUFFICIENT_SECURITY); 2743 connectionSetAuthenticationFlags(conn, AUTH_FLAG_SEND_IO_CAPABILITIES_NEGATIVE_REPLY); 2744 return; 2745 } 2746 } else { 2747 // initiator: remote io cap not yet, only check if we have ability for MITM protection if requested and OOB is not supported 2748 #ifndef ENABLE_CLASSIC_PAIRING_OOB 2749 #ifndef ENABLE_EXPLICIT_IO_CAPABILITIES_REPLY 2750 if ((conn->requested_security_level >= LEVEL_3) && (hci_stack->ssp_io_capability >= SSP_IO_CAPABILITY_NO_INPUT_NO_OUTPUT)){ 2751 log_info("Level 3+ required, but no input/output -> abort"); 2752 hci_pairing_complete(conn, ERROR_CODE_INSUFFICIENT_SECURITY); 2753 connectionSetAuthenticationFlags(conn, AUTH_FLAG_SEND_IO_CAPABILITIES_NEGATIVE_REPLY); 2754 return; 2755 } 2756 #endif 2757 #endif 2758 } 2759 2760 #ifndef ENABLE_EXPLICIT_IO_CAPABILITIES_REPLY 2761 if (hci_stack->ssp_io_capability != SSP_IO_CAPABILITY_UNKNOWN){ 2762 connectionSetAuthenticationFlags(conn, AUTH_FLAG_SEND_IO_CAPABILITIES_REPLY); 2763 } else { 2764 connectionSetAuthenticationFlags(conn, AUTH_FLAG_SEND_IO_CAPABILITIES_NEGATIVE_REPLY); 2765 } 2766 #endif 2767 } 2768 2769 #endif 2770 2771 static void event_handler(uint8_t *packet, uint16_t size){ 2772 2773 uint16_t event_length = packet[1]; 2774 2775 // assert packet is complete 2776 if (size != (event_length + 2u)){ 2777 log_error("event_handler called with packet of wrong size %d, expected %u => dropping packet", size, event_length + 2); 2778 return; 2779 } 2780 2781 bd_addr_type_t addr_type; 2782 hci_con_handle_t handle; 2783 hci_connection_t * conn; 2784 int i; 2785 int create_connection_cmd; 2786 2787 #ifdef ENABLE_CLASSIC 2788 hci_link_type_t link_type; 2789 bd_addr_t addr; 2790 #endif 2791 2792 // log_info("HCI:EVENT:%02x", hci_event_packet_get_type(packet)); 2793 2794 switch (hci_event_packet_get_type(packet)) { 2795 2796 case HCI_EVENT_COMMAND_COMPLETE: 2797 handle_command_complete_event(packet, size); 2798 break; 2799 2800 case HCI_EVENT_COMMAND_STATUS: 2801 // get num cmd packets - limit to 1 to reduce complexity 2802 hci_stack->num_cmd_packets = packet[3] ? 1 : 0; 2803 2804 // check command status to detected failed outgoing connections 2805 create_connection_cmd = 0; 2806 #ifdef ENABLE_CLASSIC 2807 if (HCI_EVENT_IS_COMMAND_STATUS(packet, hci_create_connection)){ 2808 create_connection_cmd = 1; 2809 } 2810 if (HCI_EVENT_IS_COMMAND_STATUS(packet, hci_accept_synchronous_connection)){ 2811 create_connection_cmd = 1; 2812 } 2813 #endif 2814 #ifdef ENABLE_LE_CENTRAL 2815 if (HCI_EVENT_IS_COMMAND_STATUS(packet, hci_le_create_connection)){ 2816 create_connection_cmd = 1; 2817 } 2818 #endif 2819 if (create_connection_cmd) { 2820 uint8_t status = hci_event_command_status_get_status(packet); 2821 addr_type = hci_stack->outgoing_addr_type; 2822 conn = hci_connection_for_bd_addr_and_type(hci_stack->outgoing_addr, addr_type); 2823 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); 2824 2825 // reset outgoing address info 2826 memset(hci_stack->outgoing_addr, 0, 6); 2827 hci_stack->outgoing_addr_type = BD_ADDR_TYPE_UNKNOWN; 2828 2829 // on error 2830 if (status != ERROR_CODE_SUCCESS){ 2831 #ifdef ENABLE_LE_CENTRAL 2832 if (hci_is_le_connection_type(addr_type)){ 2833 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 2834 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 2835 } 2836 #endif 2837 // error => outgoing connection failed 2838 if (conn != NULL){ 2839 hci_handle_connection_failed(conn, status); 2840 } 2841 } 2842 } 2843 2844 #ifdef ENABLE_CLASSIC 2845 if (HCI_EVENT_IS_COMMAND_STATUS(packet, hci_inquiry)) { 2846 uint8_t status = hci_event_command_status_get_status(packet); 2847 log_info("command status (inquiry), status %x", status); 2848 if (status == ERROR_CODE_SUCCESS) { 2849 hci_stack->inquiry_state = GAP_INQUIRY_STATE_ACTIVE; 2850 } else { 2851 hci_stack->inquiry_state = GAP_INQUIRY_STATE_IDLE; 2852 } 2853 } 2854 #endif 2855 break; 2856 2857 case HCI_EVENT_NUMBER_OF_COMPLETED_PACKETS:{ 2858 if (size < 3) return; 2859 uint16_t num_handles = packet[2]; 2860 if (size != (3u + num_handles * 4u)) return; 2861 uint16_t offset = 3; 2862 for (i=0; i<num_handles;i++){ 2863 handle = little_endian_read_16(packet, offset) & 0x0fffu; 2864 offset += 2u; 2865 uint16_t num_packets = little_endian_read_16(packet, offset); 2866 offset += 2u; 2867 2868 conn = hci_connection_for_handle(handle); 2869 if (!conn){ 2870 log_error("hci_number_completed_packet lists unused con handle %u", handle); 2871 continue; 2872 } 2873 2874 if (conn->num_packets_sent >= num_packets){ 2875 conn->num_packets_sent -= num_packets; 2876 } else { 2877 log_error("hci_number_completed_packets, more packet slots freed then sent."); 2878 conn->num_packets_sent = 0; 2879 } 2880 // log_info("hci_number_completed_packet %u processed for handle %u, outstanding %u", num_packets, handle, conn->num_packets_sent); 2881 2882 #ifdef ENABLE_CLASSIC 2883 // For SCO, we do the can_send_now_check here 2884 hci_notify_if_sco_can_send_now(); 2885 #endif 2886 } 2887 break; 2888 } 2889 2890 #ifdef ENABLE_CLASSIC 2891 case HCI_EVENT_FLUSH_OCCURRED: 2892 // flush occurs only if automatic flush has been enabled by gap_enable_link_watchdog() 2893 handle = hci_event_flush_occurred_get_handle(packet); 2894 conn = hci_connection_for_handle(handle); 2895 if (conn) { 2896 log_info("Flush occurred, disconnect 0x%04x", handle); 2897 conn->state = SEND_DISCONNECT; 2898 } 2899 break; 2900 2901 case HCI_EVENT_INQUIRY_COMPLETE: 2902 if (hci_stack->inquiry_state == GAP_INQUIRY_STATE_ACTIVE){ 2903 hci_stack->inquiry_state = GAP_INQUIRY_STATE_IDLE; 2904 uint8_t event[] = { GAP_EVENT_INQUIRY_COMPLETE, 1, 0}; 2905 hci_emit_event(event, sizeof(event), 1); 2906 } 2907 break; 2908 case HCI_EVENT_REMOTE_NAME_REQUEST_COMPLETE: 2909 if (hci_stack->remote_name_state == GAP_REMOTE_NAME_STATE_W4_COMPLETE){ 2910 hci_stack->remote_name_state = GAP_REMOTE_NAME_STATE_IDLE; 2911 } 2912 break; 2913 case HCI_EVENT_CONNECTION_REQUEST: 2914 reverse_bd_addr(&packet[2], addr); 2915 link_type = (hci_link_type_t) packet[11]; 2916 2917 // CVE-2020-26555: reject incoming connection from device with same BD ADDR 2918 if (memcmp(hci_stack->local_bd_addr, addr, 6) == 0){ 2919 hci_stack->decline_reason = ERROR_CODE_CONNECTION_REJECTED_DUE_TO_UNACCEPTABLE_BD_ADDR; 2920 bd_addr_copy(hci_stack->decline_addr, addr); 2921 break; 2922 } 2923 2924 if (hci_stack->gap_classic_accept_callback != NULL){ 2925 if ((*hci_stack->gap_classic_accept_callback)(addr, link_type) == 0){ 2926 hci_stack->decline_reason = ERROR_CODE_CONNECTION_REJECTED_DUE_TO_UNACCEPTABLE_BD_ADDR; 2927 bd_addr_copy(hci_stack->decline_addr, addr); 2928 break; 2929 } 2930 } 2931 2932 // TODO: eval COD 8-10 2933 log_info("Connection_incoming: %s, type %u", bd_addr_to_str(addr), (unsigned int) link_type); 2934 addr_type = (link_type == HCI_LINK_TYPE_ACL) ? BD_ADDR_TYPE_ACL : BD_ADDR_TYPE_SCO; 2935 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 2936 if (!conn) { 2937 conn = create_connection_for_bd_addr_and_type(addr, addr_type); 2938 } 2939 if (!conn) { 2940 // CONNECTION REJECTED DUE TO LIMITED RESOURCES (0X0D) 2941 hci_stack->decline_reason = ERROR_CODE_CONNECTION_REJECTED_DUE_TO_LIMITED_RESOURCES; 2942 bd_addr_copy(hci_stack->decline_addr, addr); 2943 hci_run(); 2944 // avoid event to higher layer 2945 return; 2946 } 2947 conn->role = HCI_ROLE_SLAVE; 2948 conn->state = RECEIVED_CONNECTION_REQUEST; 2949 // store info about eSCO 2950 if (link_type == HCI_LINK_TYPE_ESCO){ 2951 conn->remote_supported_features[0] |= 1; 2952 } 2953 hci_run(); 2954 break; 2955 2956 case HCI_EVENT_CONNECTION_COMPLETE: 2957 // Connection management 2958 reverse_bd_addr(&packet[5], addr); 2959 log_info("Connection_complete (status=%u) %s", packet[2], bd_addr_to_str(addr)); 2960 addr_type = BD_ADDR_TYPE_ACL; 2961 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 2962 if (conn) { 2963 if (!packet[2]){ 2964 conn->state = OPEN; 2965 conn->con_handle = little_endian_read_16(packet, 3); 2966 2967 // trigger write supervision timeout if we're master 2968 if ((hci_stack->link_supervision_timeout != HCI_LINK_SUPERVISION_TIMEOUT_DEFAULT) && (conn->role == HCI_ROLE_MASTER)){ 2969 conn->gap_connection_tasks |= GAP_CONNECTION_TASK_WRITE_SUPERVISION_TIMEOUT; 2970 } 2971 2972 // trigger write automatic flush timeout 2973 if (hci_stack->automatic_flush_timeout != 0){ 2974 conn->gap_connection_tasks |= GAP_CONNECTION_TASK_WRITE_AUTOMATIC_FLUSH_TIMEOUT; 2975 } 2976 2977 // restart timer 2978 btstack_run_loop_set_timer(&conn->timeout, HCI_CONNECTION_TIMEOUT_MS); 2979 btstack_run_loop_add_timer(&conn->timeout); 2980 2981 // trigger remote features for dedicated bonding 2982 if ((conn->bonding_flags & BONDING_DEDICATED) != 0){ 2983 hci_trigger_remote_features_for_connection(conn); 2984 } 2985 2986 log_info("New connection: handle %u, %s", conn->con_handle, bd_addr_to_str(conn->address)); 2987 2988 hci_emit_nr_connections_changed(); 2989 } else { 2990 // connection failed 2991 hci_handle_connection_failed(conn, packet[2]); 2992 } 2993 } 2994 break; 2995 2996 case HCI_EVENT_SYNCHRONOUS_CONNECTION_COMPLETE: 2997 reverse_bd_addr(&packet[5], addr); 2998 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_SCO); 2999 log_info("Synchronous Connection Complete for %p (status=%u) %s", conn, packet[2], bd_addr_to_str(addr)); 3000 if (packet[2]){ 3001 // connection failed 3002 if (conn){ 3003 hci_handle_connection_failed(conn, packet[2]); 3004 } 3005 break; 3006 } 3007 if (!conn) { 3008 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_SCO); 3009 } 3010 if (!conn) { 3011 break; 3012 } 3013 conn->state = OPEN; 3014 conn->con_handle = little_endian_read_16(packet, 3); 3015 3016 #ifdef ENABLE_SCO_OVER_HCI 3017 // update SCO 3018 if (conn->address_type == BD_ADDR_TYPE_SCO && hci_stack->hci_transport && hci_stack->hci_transport->set_sco_config){ 3019 hci_stack->hci_transport->set_sco_config(hci_stack->sco_voice_setting_active, hci_number_sco_connections()); 3020 } 3021 // trigger can send now 3022 if (hci_have_usb_transport()){ 3023 hci_stack->sco_can_send_now = true; 3024 } 3025 #endif 3026 #ifdef HAVE_SCO_TRANSPORT 3027 // configure sco transport 3028 if (hci_stack->sco_transport != NULL){ 3029 sco_format_t sco_format = ((hci_stack->sco_voice_setting_active & 0x03) == 0x03) ? SCO_FORMAT_8_BIT : SCO_FORMAT_16_BIT; 3030 hci_stack->sco_transport->open(conn->con_handle, sco_format); 3031 } 3032 #endif 3033 break; 3034 3035 case HCI_EVENT_READ_REMOTE_SUPPORTED_FEATURES_COMPLETE: 3036 handle = little_endian_read_16(packet, 3); 3037 conn = hci_connection_for_handle(handle); 3038 if (!conn) break; 3039 if (!packet[2]){ 3040 const uint8_t * features = &packet[5]; 3041 hci_handle_remote_features_page_0(conn, features); 3042 3043 // read extended features if possible 3044 if (hci_command_supported(SUPPORTED_HCI_COMMAND_READ_REMOTE_EXTENDED_FEATURES) 3045 && ((conn->remote_supported_features[0] & 2) != 0)) { 3046 conn->bonding_flags |= BONDING_REQUEST_REMOTE_FEATURES_PAGE_1; 3047 break; 3048 } 3049 } 3050 hci_handle_remote_features_received(conn); 3051 break; 3052 3053 case HCI_EVENT_READ_REMOTE_EXTENDED_FEATURES_COMPLETE: 3054 handle = little_endian_read_16(packet, 3); 3055 conn = hci_connection_for_handle(handle); 3056 if (!conn) break; 3057 // status = ok, page = 1 3058 if (!packet[2]) { 3059 uint8_t page_number = packet[5]; 3060 uint8_t maximum_page_number = packet[6]; 3061 const uint8_t * features = &packet[7]; 3062 bool done = false; 3063 switch (page_number){ 3064 case 1: 3065 hci_handle_remote_features_page_1(conn, features); 3066 if (maximum_page_number >= 2){ 3067 // get Secure Connections (Controller) from Page 2 if available 3068 conn->bonding_flags |= BONDING_REQUEST_REMOTE_FEATURES_PAGE_2; 3069 } else { 3070 // otherwise, assume SC (Controller) == SC (Host) 3071 if ((conn->bonding_flags & BONDING_REMOTE_SUPPORTS_SC_HOST) != 0){ 3072 conn->bonding_flags |= BONDING_REMOTE_SUPPORTS_SC_CONTROLLER; 3073 } 3074 done = true; 3075 } 3076 break; 3077 case 2: 3078 hci_handle_remote_features_page_2(conn, features); 3079 done = true; 3080 break; 3081 default: 3082 break; 3083 } 3084 if (!done) break; 3085 } 3086 hci_handle_remote_features_received(conn); 3087 break; 3088 3089 case HCI_EVENT_LINK_KEY_REQUEST: 3090 #ifndef ENABLE_EXPLICIT_LINK_KEY_REPLY 3091 hci_event_link_key_request_get_bd_addr(packet, addr); 3092 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 3093 if (!conn) break; 3094 3095 // lookup link key in db if not cached 3096 if ((conn->link_key_type == INVALID_LINK_KEY) && (hci_stack->link_key_db != NULL)){ 3097 hci_stack->link_key_db->get_link_key(conn->address, conn->link_key, &conn->link_key_type); 3098 } 3099 3100 // response sent by hci_run() 3101 conn->authentication_flags |= AUTH_FLAG_HANDLE_LINK_KEY_REQUEST; 3102 #endif 3103 break; 3104 3105 case HCI_EVENT_LINK_KEY_NOTIFICATION: { 3106 hci_event_link_key_request_get_bd_addr(packet, addr); 3107 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 3108 if (!conn) break; 3109 3110 hci_pairing_complete(conn, ERROR_CODE_SUCCESS); 3111 3112 // CVE-2020-26555: ignore NULL link key 3113 // default link_key_type = INVALID_LINK_KEY asserts that NULL key won't be used for encryption 3114 if (btstack_is_null(&packet[8], 16)) break; 3115 3116 link_key_type_t link_key_type = (link_key_type_t)packet[24]; 3117 // Change Connection Encryption keeps link key type 3118 if (link_key_type != CHANGED_COMBINATION_KEY){ 3119 conn->link_key_type = link_key_type; 3120 } 3121 3122 // cache link key. link keys stored in little-endian format for legacy reasons 3123 memcpy(&conn->link_key, &packet[8], 16); 3124 3125 // only store link key: 3126 // - if bondable enabled 3127 if (hci_stack->bondable == false) break; 3128 // - if security level sufficient 3129 if (gap_security_level_for_link_key_type(link_key_type) < conn->requested_security_level) break; 3130 // - for SSP, also check if remote side requested bonding as well 3131 if (conn->link_key_type != COMBINATION_KEY){ 3132 bool remote_bonding = conn->io_cap_response_auth_req >= SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_DEDICATED_BONDING; 3133 if (!remote_bonding){ 3134 break; 3135 } 3136 } 3137 gap_store_link_key_for_bd_addr(addr, &packet[8], conn->link_key_type); 3138 break; 3139 } 3140 3141 case HCI_EVENT_PIN_CODE_REQUEST: 3142 hci_event_pin_code_request_get_bd_addr(packet, addr); 3143 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 3144 if (!conn) break; 3145 3146 hci_pairing_started(conn, false); 3147 // abort pairing if: non-bondable mode (pin code request is not forwarded to app) 3148 if (!hci_stack->bondable ){ 3149 conn->authentication_flags |= AUTH_FLAG_DENY_PIN_CODE_REQUEST; 3150 hci_pairing_complete(conn, ERROR_CODE_PAIRING_NOT_ALLOWED); 3151 hci_run(); 3152 return; 3153 } 3154 // abort pairing if: LEVEL_4 required (pin code request is not forwarded to app) 3155 if ((hci_stack->gap_secure_connections_only_mode) || (conn->requested_security_level == LEVEL_4)){ 3156 log_info("Level 4 required, but SC not supported -> abort"); 3157 conn->authentication_flags |= AUTH_FLAG_DENY_PIN_CODE_REQUEST; 3158 hci_pairing_complete(conn, ERROR_CODE_INSUFFICIENT_SECURITY); 3159 hci_run(); 3160 return; 3161 } 3162 break; 3163 3164 case HCI_EVENT_IO_CAPABILITY_RESPONSE: 3165 hci_event_io_capability_response_get_bd_addr(packet, addr); 3166 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 3167 if (!conn) break; 3168 3169 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], AUTH_FLAG_RECV_IO_CAPABILITIES_RESPONSE); 3170 hci_pairing_started(conn, true); 3171 conn->io_cap_response_auth_req = hci_event_io_capability_response_get_authentication_requirements(packet); 3172 conn->io_cap_response_io = hci_event_io_capability_response_get_io_capability(packet); 3173 #ifdef ENABLE_CLASSIC_PAIRING_OOB 3174 conn->io_cap_response_oob_data = hci_event_io_capability_response_get_oob_data_present(packet); 3175 #endif 3176 break; 3177 3178 case HCI_EVENT_IO_CAPABILITY_REQUEST: 3179 hci_event_io_capability_response_get_bd_addr(packet, addr); 3180 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 3181 if (!conn) break; 3182 3183 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], AUTH_FLAG_RECV_IO_CAPABILITIES_REQUEST); 3184 hci_connection_timestamp(conn); 3185 hci_pairing_started(conn, true); 3186 break; 3187 3188 #ifdef ENABLE_CLASSIC_PAIRING_OOB 3189 case HCI_EVENT_REMOTE_OOB_DATA_REQUEST: 3190 hci_event_remote_oob_data_request_get_bd_addr(packet, addr); 3191 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 3192 if (!conn) break; 3193 3194 hci_connection_timestamp(conn); 3195 3196 hci_pairing_started(conn, true); 3197 3198 connectionSetAuthenticationFlags(conn, AUTH_FLAG_SEND_REMOTE_OOB_DATA_REPLY); 3199 break; 3200 #endif 3201 3202 case HCI_EVENT_USER_CONFIRMATION_REQUEST: 3203 hci_event_user_confirmation_request_get_bd_addr(packet, addr); 3204 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 3205 if (!conn) break; 3206 if (hci_ssp_security_level_possible_for_io_cap(conn->requested_security_level, hci_stack->ssp_io_capability, conn->io_cap_response_io)) { 3207 if (hci_stack->ssp_auto_accept){ 3208 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], AUTH_FLAG_SEND_USER_CONFIRM_REPLY); 3209 }; 3210 } else { 3211 hci_pairing_complete(conn, ERROR_CODE_INSUFFICIENT_SECURITY); 3212 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], AUTH_FLAG_SEND_USER_CONFIRM_NEGATIVE_REPLY); 3213 // don't forward event to app 3214 hci_run(); 3215 return; 3216 } 3217 break; 3218 3219 case HCI_EVENT_USER_PASSKEY_REQUEST: 3220 // Pairing using Passkey results in MITM protection. If Level 4 is required, support for SC is validated on IO Cap Request 3221 if (hci_stack->ssp_auto_accept){ 3222 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], AUTH_FLAG_SEND_USER_PASSKEY_REPLY); 3223 }; 3224 break; 3225 3226 case HCI_EVENT_MODE_CHANGE: 3227 handle = hci_event_mode_change_get_handle(packet); 3228 conn = hci_connection_for_handle(handle); 3229 if (!conn) break; 3230 conn->connection_mode = hci_event_mode_change_get_mode(packet); 3231 log_info("HCI_EVENT_MODE_CHANGE, handle 0x%04x, mode %u", handle, conn->connection_mode); 3232 break; 3233 #endif 3234 3235 case HCI_EVENT_ENCRYPTION_CHANGE: 3236 handle = hci_event_encryption_change_get_connection_handle(packet); 3237 conn = hci_connection_for_handle(handle); 3238 if (!conn) break; 3239 if (hci_event_encryption_change_get_status(packet) == 0u) { 3240 uint8_t encryption_enabled = hci_event_encryption_change_get_encryption_enabled(packet); 3241 if (encryption_enabled){ 3242 if (hci_is_le_connection(conn)){ 3243 // For LE, we accept connection as encrypted 3244 conn->authentication_flags |= AUTH_FLAG_CONNECTION_ENCRYPTED; 3245 } 3246 #ifdef ENABLE_CLASSIC 3247 else { 3248 3249 // dedicated bonding: send result and disconnect 3250 if (conn->bonding_flags & BONDING_DEDICATED){ 3251 conn->bonding_flags &= ~BONDING_DEDICATED; 3252 conn->bonding_flags |= BONDING_DISCONNECT_DEDICATED_DONE; 3253 conn->bonding_status = packet[2]; 3254 break; 3255 } 3256 3257 // Detect Secure Connection -> Legacy Connection Downgrade Attack (BIAS) 3258 bool sc_used_during_pairing = gap_secure_connection_for_link_key_type(conn->link_key_type); 3259 bool connected_uses_aes_ccm = encryption_enabled == 2; 3260 if (hci_stack->secure_connections_active && sc_used_during_pairing && !connected_uses_aes_ccm){ 3261 log_info("SC during pairing, but only E0 now -> abort"); 3262 conn->bonding_flags |= BONDING_DISCONNECT_SECURITY_BLOCK; 3263 break; 3264 } 3265 3266 // if AES-CCM is used, authentication used SC -> authentication was mutual and we can skip explicit authentication 3267 if (connected_uses_aes_ccm){ 3268 conn->authentication_flags |= AUTH_FLAG_CONNECTION_AUTHENTICATED; 3269 } 3270 3271 #ifdef ENABLE_TESTING_SUPPORT 3272 // work around for issue with PTS dongle 3273 conn->authentication_flags |= AUTH_FLAG_CONNECTION_AUTHENTICATED; 3274 #endif 3275 if (hci_command_supported(SUPPORTED_HCI_COMMAND_READ_ENCRYPTION_KEY_SIZE)){ 3276 // For Classic, we need to validate encryption key size first, if possible (== supported by Controller) 3277 conn->bonding_flags |= BONDING_SEND_READ_ENCRYPTION_KEY_SIZE; 3278 } else { 3279 // if not, pretend everything is perfect 3280 hci_handle_read_encryption_key_size_complete(conn, 16); 3281 } 3282 } 3283 #endif 3284 } else { 3285 conn->authentication_flags &= ~AUTH_FLAG_CONNECTION_ENCRYPTED; 3286 } 3287 } 3288 3289 break; 3290 3291 #ifdef ENABLE_CLASSIC 3292 case HCI_EVENT_AUTHENTICATION_COMPLETE_EVENT: 3293 handle = hci_event_authentication_complete_get_connection_handle(packet); 3294 conn = hci_connection_for_handle(handle); 3295 if (!conn) break; 3296 3297 // clear authentication active flag 3298 conn->bonding_flags &= ~BONDING_SENT_AUTHENTICATE_REQUEST; 3299 hci_pairing_complete(conn, hci_event_authentication_complete_get_status(packet)); 3300 3301 // authenticated only if auth status == 0 3302 if (hci_event_authentication_complete_get_status(packet) == 0){ 3303 // authenticated 3304 conn->authentication_flags |= AUTH_FLAG_CONNECTION_AUTHENTICATED; 3305 3306 // If not already encrypted, start encryption 3307 if ((conn->authentication_flags & AUTH_FLAG_CONNECTION_ENCRYPTED) == 0){ 3308 conn->bonding_flags |= BONDING_SEND_ENCRYPTION_REQUEST; 3309 break; 3310 } 3311 } 3312 3313 // emit updated security level 3314 hci_emit_security_level(handle, gap_security_level_for_connection(conn)); 3315 break; 3316 3317 case HCI_EVENT_SIMPLE_PAIRING_COMPLETE: 3318 hci_event_simple_pairing_complete_get_bd_addr(packet, addr); 3319 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 3320 if (!conn) break; 3321 3322 // treat successfully paired connection as authenticated 3323 if (hci_event_simple_pairing_complete_get_status(packet) == ERROR_CODE_SUCCESS){ 3324 conn->authentication_flags |= AUTH_FLAG_CONNECTION_AUTHENTICATED; 3325 } 3326 3327 hci_pairing_complete(conn, hci_event_simple_pairing_complete_get_status(packet)); 3328 break; 3329 #endif 3330 3331 // HCI_EVENT_DISCONNECTION_COMPLETE 3332 // has been split, to first notify stack before shutting connection down 3333 // see end of function, too. 3334 case HCI_EVENT_DISCONNECTION_COMPLETE: 3335 if (packet[2]) break; // status != 0 3336 handle = little_endian_read_16(packet, 3); 3337 // drop outgoing ACL fragments if it is for closed connection and release buffer if tx not active 3338 if (hci_stack->acl_fragmentation_total_size > 0u) { 3339 if (handle == READ_ACL_CONNECTION_HANDLE(hci_stack->hci_packet_buffer)){ 3340 int release_buffer = hci_stack->acl_fragmentation_tx_active == 0u; 3341 log_info("drop fragmented ACL data for closed connection, release buffer %u", release_buffer); 3342 hci_stack->acl_fragmentation_total_size = 0; 3343 hci_stack->acl_fragmentation_pos = 0; 3344 if (release_buffer){ 3345 hci_release_packet_buffer(); 3346 } 3347 } 3348 } 3349 3350 conn = hci_connection_for_handle(handle); 3351 if (!conn) break; 3352 #ifdef ENABLE_CLASSIC 3353 // pairing failed if it was ongoing 3354 hci_pairing_complete(conn, ERROR_CODE_REMOTE_USER_TERMINATED_CONNECTION); 3355 #endif 3356 3357 // emit dedicatd bonding event 3358 if (conn->bonding_flags & BONDING_EMIT_COMPLETE_ON_DISCONNECT){ 3359 hci_emit_dedicated_bonding_result(conn->address, conn->bonding_status); 3360 } 3361 3362 // mark connection for shutdown, stop timers, reset state 3363 conn->state = RECEIVED_DISCONNECTION_COMPLETE; 3364 hci_connection_stop_timer(conn); 3365 hci_connection_init(conn); 3366 3367 #ifdef ENABLE_BLE 3368 #ifdef ENABLE_LE_PERIPHERAL 3369 // re-enable advertisements for le connections if active 3370 if (hci_is_le_connection(conn)){ 3371 hci_update_advertisements_enabled_for_current_roles(); 3372 } 3373 #endif 3374 #endif 3375 break; 3376 3377 case HCI_EVENT_HARDWARE_ERROR: 3378 log_error("Hardware Error: 0x%02x", packet[2]); 3379 if (hci_stack->hardware_error_callback){ 3380 (*hci_stack->hardware_error_callback)(packet[2]); 3381 } else { 3382 // if no special requests, just reboot stack 3383 hci_power_control_off(); 3384 hci_power_control_on(); 3385 } 3386 break; 3387 3388 #ifdef ENABLE_CLASSIC 3389 case HCI_EVENT_ROLE_CHANGE: 3390 if (packet[2]) break; // status != 0 3391 reverse_bd_addr(&packet[3], addr); 3392 addr_type = BD_ADDR_TYPE_ACL; 3393 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 3394 if (!conn) break; 3395 conn->role = packet[9]; 3396 break; 3397 #endif 3398 3399 case HCI_EVENT_TRANSPORT_PACKET_SENT: 3400 // release packet buffer only for asynchronous transport and if there are not further fragements 3401 if (hci_transport_synchronous()) { 3402 log_error("Synchronous HCI Transport shouldn't send HCI_EVENT_TRANSPORT_PACKET_SENT"); 3403 return; // instead of break: to avoid re-entering hci_run() 3404 } 3405 hci_stack->acl_fragmentation_tx_active = 0; 3406 if (hci_stack->acl_fragmentation_total_size) break; 3407 hci_release_packet_buffer(); 3408 3409 // L2CAP receives this event via the hci_emit_event below 3410 3411 #ifdef ENABLE_CLASSIC 3412 // For SCO, we do the can_send_now_check here 3413 hci_notify_if_sco_can_send_now(); 3414 #endif 3415 break; 3416 3417 #ifdef ENABLE_CLASSIC 3418 case HCI_EVENT_SCO_CAN_SEND_NOW: 3419 // For SCO, we do the can_send_now_check here 3420 hci_stack->sco_can_send_now = true; 3421 hci_notify_if_sco_can_send_now(); 3422 return; 3423 3424 // explode inquriy results for easier consumption 3425 case HCI_EVENT_INQUIRY_RESULT: 3426 case HCI_EVENT_INQUIRY_RESULT_WITH_RSSI: 3427 case HCI_EVENT_EXTENDED_INQUIRY_RESPONSE: 3428 gap_inquiry_explode(packet, size); 3429 break; 3430 #endif 3431 3432 #ifdef ENABLE_BLE 3433 case HCI_EVENT_LE_META: 3434 switch (packet[2]){ 3435 #ifdef ENABLE_LE_CENTRAL 3436 case HCI_SUBEVENT_LE_ADVERTISING_REPORT: 3437 if (!hci_stack->le_scanning_enabled) break; 3438 le_handle_advertisement_report(packet, size); 3439 break; 3440 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 3441 case HCI_SUBEVENT_LE_EXTENDED_ADVERTISING_REPORT: 3442 if (!hci_stack->le_scanning_enabled) break; 3443 le_handle_extended_advertisement_report(packet, size); 3444 break; 3445 #endif 3446 #endif 3447 case HCI_SUBEVENT_LE_CONNECTION_COMPLETE: 3448 event_handle_le_connection_complete(packet); 3449 break; 3450 3451 // log_info("LE buffer size: %u, count %u", little_endian_read_16(packet,6), packet[8]); 3452 case HCI_SUBEVENT_LE_CONNECTION_UPDATE_COMPLETE: 3453 handle = hci_subevent_le_connection_update_complete_get_connection_handle(packet); 3454 conn = hci_connection_for_handle(handle); 3455 if (!conn) break; 3456 conn->le_connection_interval = hci_subevent_le_connection_update_complete_get_conn_interval(packet); 3457 break; 3458 3459 case HCI_SUBEVENT_LE_REMOTE_CONNECTION_PARAMETER_REQUEST: 3460 // connection 3461 handle = hci_subevent_le_remote_connection_parameter_request_get_connection_handle(packet); 3462 conn = hci_connection_for_handle(handle); 3463 if (conn) { 3464 // read arguments 3465 uint16_t le_conn_interval_min = hci_subevent_le_remote_connection_parameter_request_get_interval_min(packet); 3466 uint16_t le_conn_interval_max = hci_subevent_le_remote_connection_parameter_request_get_interval_max(packet); 3467 uint16_t le_conn_latency = hci_subevent_le_remote_connection_parameter_request_get_latency(packet); 3468 uint16_t le_supervision_timeout = hci_subevent_le_remote_connection_parameter_request_get_timeout(packet); 3469 3470 // validate against current connection parameter range 3471 le_connection_parameter_range_t existing_range; 3472 gap_get_connection_parameter_range(&existing_range); 3473 int update_parameter = gap_connection_parameter_range_included(&existing_range, le_conn_interval_min, le_conn_interval_max, le_conn_latency, le_supervision_timeout); 3474 if (update_parameter){ 3475 conn->le_con_parameter_update_state = CON_PARAMETER_UPDATE_REPLY; 3476 conn->le_conn_interval_min = le_conn_interval_min; 3477 conn->le_conn_interval_max = le_conn_interval_max; 3478 conn->le_conn_latency = le_conn_latency; 3479 conn->le_supervision_timeout = le_supervision_timeout; 3480 } else { 3481 conn->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NEGATIVE_REPLY; 3482 } 3483 } 3484 break; 3485 #ifdef ENABLE_LE_LIMIT_ACL_FRAGMENT_BY_MAX_OCTETS 3486 case HCI_SUBEVENT_LE_DATA_LENGTH_CHANGE: 3487 handle = hci_subevent_le_data_length_change_get_connection_handle(packet); 3488 conn = hci_connection_for_handle(handle); 3489 if (conn) { 3490 conn->le_max_tx_octets = hci_subevent_le_data_length_change_get_max_tx_octets(packet); 3491 } 3492 break; 3493 #endif 3494 default: 3495 break; 3496 } 3497 break; 3498 #endif 3499 case HCI_EVENT_VENDOR_SPECIFIC: 3500 // Vendor specific commands often create vendor specific event instead of num completed packets 3501 // To avoid getting stuck as num_cmds_packets is zero, reset it to 1 for controllers with this behaviour 3502 switch (hci_stack->manufacturer){ 3503 case BLUETOOTH_COMPANY_ID_CAMBRIDGE_SILICON_RADIO: 3504 hci_stack->num_cmd_packets = 1; 3505 break; 3506 default: 3507 break; 3508 } 3509 break; 3510 default: 3511 break; 3512 } 3513 3514 handle_event_for_current_stack_state(packet, size); 3515 3516 // notify upper stack 3517 hci_emit_event(packet, size, 0); // don't dump, already happened in packet handler 3518 3519 // moved here to give upper stack a chance to close down everything with hci_connection_t intact 3520 if ((hci_event_packet_get_type(packet) == HCI_EVENT_DISCONNECTION_COMPLETE) && (packet[2] == 0)){ 3521 handle = little_endian_read_16(packet, 3); 3522 hci_connection_t * aConn = hci_connection_for_handle(handle); 3523 // discard connection if app did not trigger a reconnect in the event handler 3524 if (aConn && aConn->state == RECEIVED_DISCONNECTION_COMPLETE){ 3525 hci_shutdown_connection(aConn); 3526 } 3527 } 3528 3529 // execute main loop 3530 hci_run(); 3531 } 3532 3533 #ifdef ENABLE_CLASSIC 3534 3535 #ifdef ENABLE_SCO_OVER_HCI 3536 static void sco_tx_timeout_handler(btstack_timer_source_t * ts); 3537 static void sco_schedule_tx(hci_connection_t * conn); 3538 3539 static void sco_tx_timeout_handler(btstack_timer_source_t * ts){ 3540 log_debug("SCO TX Timeout"); 3541 hci_con_handle_t con_handle = (hci_con_handle_t) (uintptr_t) btstack_run_loop_get_timer_context(ts); 3542 hci_connection_t * conn = hci_connection_for_handle(con_handle); 3543 if (!conn) return; 3544 3545 // trigger send 3546 conn->sco_tx_ready = 1; 3547 // extra packet if CVSD but SCO buffer is too short 3548 if (((hci_stack->sco_voice_setting_active & 0x03) != 0x03) && (hci_stack->sco_data_packet_length < 123)){ 3549 conn->sco_tx_ready++; 3550 } 3551 hci_notify_if_sco_can_send_now(); 3552 } 3553 3554 3555 #define SCO_TX_AFTER_RX_MS (6) 3556 3557 static void sco_schedule_tx(hci_connection_t * conn){ 3558 3559 uint32_t now = btstack_run_loop_get_time_ms(); 3560 uint32_t sco_tx_ms = conn->sco_rx_ms + SCO_TX_AFTER_RX_MS; 3561 int time_delta_ms = sco_tx_ms - now; 3562 3563 btstack_timer_source_t * timer = (conn->sco_rx_count & 1) ? &conn->timeout : &conn->timeout_sco; 3564 3565 // log_error("SCO TX at %u in %u", (int) sco_tx_ms, time_delta_ms); 3566 btstack_run_loop_remove_timer(timer); 3567 btstack_run_loop_set_timer(timer, time_delta_ms); 3568 btstack_run_loop_set_timer_context(timer, (void *) (uintptr_t) conn->con_handle); 3569 btstack_run_loop_set_timer_handler(timer, &sco_tx_timeout_handler); 3570 btstack_run_loop_add_timer(timer); 3571 } 3572 #endif 3573 3574 static void sco_handler(uint8_t * packet, uint16_t size){ 3575 // lookup connection struct 3576 hci_con_handle_t con_handle = READ_SCO_CONNECTION_HANDLE(packet); 3577 hci_connection_t * conn = hci_connection_for_handle(con_handle); 3578 if (!conn) return; 3579 3580 #ifdef ENABLE_SCO_OVER_HCI 3581 // CSR 8811 prefixes 60 byte SCO packet in transparent mode with 20 zero bytes -> skip first 20 payload bytes 3582 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_CAMBRIDGE_SILICON_RADIO){ 3583 if ((size == 83) && ((hci_stack->sco_voice_setting_active & 0x03) == 0x03)){ 3584 packet[2] = 0x3c; 3585 memmove(&packet[3], &packet[23], 63); 3586 size = 63; 3587 } 3588 } 3589 3590 if (hci_have_usb_transport()){ 3591 // Nothing to do 3592 } else { 3593 // 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); 3594 if (hci_stack->synchronous_flow_control_enabled == 0){ 3595 uint32_t now = btstack_run_loop_get_time_ms(); 3596 3597 if (!conn->sco_rx_valid){ 3598 // ignore first 10 packets 3599 conn->sco_rx_count++; 3600 // log_debug("sco rx count %u", conn->sco_rx_count); 3601 if (conn->sco_rx_count == 10) { 3602 // use first timestamp as is and pretent it just started 3603 conn->sco_rx_ms = now; 3604 conn->sco_rx_valid = 1; 3605 conn->sco_rx_count = 0; 3606 sco_schedule_tx(conn); 3607 } 3608 } else { 3609 // track expected arrival timme 3610 conn->sco_rx_count++; 3611 conn->sco_rx_ms += 7; 3612 int delta = (int32_t) (now - conn->sco_rx_ms); 3613 if (delta > 0){ 3614 conn->sco_rx_ms++; 3615 } 3616 // log_debug("sco rx %u", conn->sco_rx_ms); 3617 sco_schedule_tx(conn); 3618 } 3619 } 3620 } 3621 #endif 3622 3623 // deliver to app 3624 if (hci_stack->sco_packet_handler) { 3625 hci_stack->sco_packet_handler(HCI_SCO_DATA_PACKET, 0, packet, size); 3626 } 3627 3628 #ifdef HAVE_SCO_TRANSPORT 3629 // We can send one packet for each received packet 3630 conn->sco_tx_ready++; 3631 hci_notify_if_sco_can_send_now(); 3632 #endif 3633 3634 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 3635 conn->num_packets_completed++; 3636 hci_stack->host_completed_packets = 1; 3637 hci_run(); 3638 #endif 3639 } 3640 #endif 3641 3642 static void packet_handler(uint8_t packet_type, uint8_t *packet, uint16_t size){ 3643 hci_dump_packet(packet_type, 1, packet, size); 3644 switch (packet_type) { 3645 case HCI_EVENT_PACKET: 3646 event_handler(packet, size); 3647 break; 3648 case HCI_ACL_DATA_PACKET: 3649 acl_handler(packet, size); 3650 break; 3651 #ifdef ENABLE_CLASSIC 3652 case HCI_SCO_DATA_PACKET: 3653 sco_handler(packet, size); 3654 break; 3655 #endif 3656 default: 3657 break; 3658 } 3659 } 3660 3661 /** 3662 * @brief Add event packet handler. 3663 */ 3664 void hci_add_event_handler(btstack_packet_callback_registration_t * callback_handler){ 3665 btstack_linked_list_add_tail(&hci_stack->event_handlers, (btstack_linked_item_t*) callback_handler); 3666 } 3667 3668 /** 3669 * @brief Remove event packet handler. 3670 */ 3671 void hci_remove_event_handler(btstack_packet_callback_registration_t * callback_handler){ 3672 btstack_linked_list_remove(&hci_stack->event_handlers, (btstack_linked_item_t*) callback_handler); 3673 } 3674 3675 /** Register HCI packet handlers */ 3676 void hci_register_acl_packet_handler(btstack_packet_handler_t handler){ 3677 hci_stack->acl_packet_handler = handler; 3678 } 3679 3680 #ifdef ENABLE_CLASSIC 3681 /** 3682 * @brief Registers a packet handler for SCO data. Used for HSP and HFP profiles. 3683 */ 3684 void hci_register_sco_packet_handler(btstack_packet_handler_t handler){ 3685 hci_stack->sco_packet_handler = handler; 3686 } 3687 #endif 3688 3689 static void hci_state_reset(void){ 3690 // no connections yet 3691 hci_stack->connections = NULL; 3692 3693 // keep discoverable/connectable as this has been requested by the client(s) 3694 // hci_stack->discoverable = 0; 3695 // hci_stack->connectable = 0; 3696 // hci_stack->bondable = 1; 3697 // hci_stack->own_addr_type = 0; 3698 3699 // buffer is free 3700 hci_stack->hci_packet_buffer_reserved = false; 3701 3702 // no pending cmds 3703 hci_stack->decline_reason = 0; 3704 3705 hci_stack->secure_connections_active = false; 3706 3707 #ifdef ENABLE_CLASSIC 3708 hci_stack->inquiry_lap = GAP_IAC_GENERAL_INQUIRY; 3709 hci_stack->page_timeout = 0x6000; // ca. 15 sec 3710 3711 hci_stack->gap_tasks_classic = 3712 GAP_TASK_SET_DEFAULT_LINK_POLICY | 3713 GAP_TASK_SET_CLASS_OF_DEVICE | 3714 GAP_TASK_SET_LOCAL_NAME | 3715 GAP_TASK_SET_EIR_DATA | 3716 GAP_TASK_WRITE_SCAN_ENABLE | 3717 GAP_TASK_WRITE_PAGE_TIMEOUT; 3718 #endif 3719 3720 #ifdef ENABLE_CLASSIC_PAIRING_OOB 3721 hci_stack->classic_read_local_oob_data = false; 3722 hci_stack->classic_oob_con_handle = HCI_CON_HANDLE_INVALID; 3723 #endif 3724 3725 // LE 3726 #ifdef ENABLE_BLE 3727 memset(hci_stack->le_random_address, 0, 6); 3728 hci_stack->le_random_address_set = 0; 3729 #endif 3730 #ifdef ENABLE_LE_CENTRAL 3731 hci_stack->le_scanning_active = false; 3732 hci_stack->le_scanning_param_update = true; 3733 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 3734 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 3735 hci_stack->le_whitelist_capacity = 0; 3736 #endif 3737 #ifdef ENABLE_LE_PERIPHERAL 3738 hci_stack->le_advertisements_state &= ~LE_ADVERTISEMENT_STATE_ACTIVE; 3739 if ((hci_stack->le_advertisements_state & LE_ADVERTISEMENT_STATE_PARAMS_SET) != 0){ 3740 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_PARAMS; 3741 } 3742 if (hci_stack->le_advertisements_data != NULL){ 3743 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_ADV_DATA; 3744 } 3745 #endif 3746 } 3747 3748 #ifdef ENABLE_CLASSIC 3749 /** 3750 * @brief Configure Bluetooth hardware control. Has to be called before power on. 3751 */ 3752 void hci_set_link_key_db(btstack_link_key_db_t const * link_key_db){ 3753 // store and open remote device db 3754 hci_stack->link_key_db = link_key_db; 3755 if (hci_stack->link_key_db) { 3756 hci_stack->link_key_db->open(); 3757 } 3758 } 3759 #endif 3760 3761 void hci_init(const hci_transport_t *transport, const void *config){ 3762 3763 #ifdef HAVE_MALLOC 3764 if (!hci_stack) { 3765 hci_stack = (hci_stack_t*) malloc(sizeof(hci_stack_t)); 3766 } 3767 #else 3768 hci_stack = &hci_stack_static; 3769 #endif 3770 memset(hci_stack, 0, sizeof(hci_stack_t)); 3771 3772 // reference to use transport layer implementation 3773 hci_stack->hci_transport = transport; 3774 3775 // reference to used config 3776 hci_stack->config = config; 3777 3778 // setup pointer for outgoing packet buffer 3779 hci_stack->hci_packet_buffer = &hci_stack->hci_packet_buffer_data[HCI_OUTGOING_PRE_BUFFER_SIZE]; 3780 3781 // max acl payload size defined in config.h 3782 hci_stack->acl_data_packet_length = HCI_ACL_PAYLOAD_SIZE; 3783 3784 // register packet handlers with transport 3785 transport->register_packet_handler(&packet_handler); 3786 3787 hci_stack->state = HCI_STATE_OFF; 3788 3789 // class of device 3790 hci_stack->class_of_device = 0x007a020c; // Smartphone 3791 3792 // bondable by default 3793 hci_stack->bondable = 1; 3794 3795 #ifdef ENABLE_CLASSIC 3796 // classic name 3797 hci_stack->local_name = default_classic_name; 3798 3799 // Master slave policy 3800 hci_stack->master_slave_policy = 1; 3801 3802 // Allow Role Switch 3803 hci_stack->allow_role_switch = 1; 3804 3805 // Default / minimum security level = 2 3806 hci_stack->gap_security_level = LEVEL_2; 3807 3808 // Default Security Mode 4 3809 hci_stack->gap_security_mode = GAP_SECURITY_MODE_4; 3810 3811 // Errata-11838 mandates 7 bytes for GAP Security Level 1-3 3812 hci_stack->gap_required_encyrption_key_size = 7; 3813 3814 // Link Supervision Timeout 3815 hci_stack->link_supervision_timeout = HCI_LINK_SUPERVISION_TIMEOUT_DEFAULT; 3816 3817 #endif 3818 3819 // Secure Simple Pairing default: enable, no I/O capabilities, general bonding, mitm not required, auto accept 3820 hci_stack->ssp_enable = 1; 3821 hci_stack->ssp_io_capability = SSP_IO_CAPABILITY_NO_INPUT_NO_OUTPUT; 3822 hci_stack->ssp_authentication_requirement = SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_GENERAL_BONDING; 3823 hci_stack->ssp_auto_accept = 1; 3824 3825 // Secure Connections: enable (requires support from Controller) 3826 hci_stack->secure_connections_enable = true; 3827 3828 // voice setting - signed 16 bit pcm data with CVSD over the air 3829 hci_stack->sco_voice_setting = 0x60; 3830 3831 #ifdef ENABLE_LE_CENTRAL 3832 // connection parameter to use for outgoing connections 3833 hci_stack->le_connection_scan_interval = 0x0060; // 60ms 3834 hci_stack->le_connection_scan_window = 0x0030; // 30ms 3835 hci_stack->le_connection_interval_min = 0x0008; // 10 ms 3836 hci_stack->le_connection_interval_max = 0x0018; // 30 ms 3837 hci_stack->le_connection_latency = 4; // 4 3838 hci_stack->le_supervision_timeout = 0x0048; // 720 ms 3839 hci_stack->le_minimum_ce_length = 2; // 1.25 ms 3840 hci_stack->le_maximum_ce_length = 0x0030; // 30 ms 3841 3842 // default LE Scanning 3843 hci_stack->le_scan_type = 0x1; // active 3844 hci_stack->le_scan_interval = 0x1e0; // 300 ms 3845 hci_stack->le_scan_window = 0x30; // 30 ms 3846 #endif 3847 3848 #ifdef ENABLE_LE_PERIPHERAL 3849 hci_stack->le_max_number_peripheral_connections = 1; // only single connection as peripheral 3850 #endif 3851 3852 // connection parameter range used to answer connection parameter update requests in l2cap 3853 hci_stack->le_connection_parameter_range.le_conn_interval_min = 6; 3854 hci_stack->le_connection_parameter_range.le_conn_interval_max = 3200; 3855 hci_stack->le_connection_parameter_range.le_conn_latency_min = 0; 3856 hci_stack->le_connection_parameter_range.le_conn_latency_max = 500; 3857 hci_stack->le_connection_parameter_range.le_supervision_timeout_min = 10; 3858 hci_stack->le_connection_parameter_range.le_supervision_timeout_max = 3200; 3859 3860 hci_state_reset(); 3861 } 3862 3863 void hci_deinit(void){ 3864 btstack_run_loop_remove_timer(&hci_stack->timeout); 3865 #ifdef HAVE_MALLOC 3866 if (hci_stack) { 3867 free(hci_stack); 3868 } 3869 #endif 3870 hci_stack = NULL; 3871 3872 #ifdef ENABLE_CLASSIC 3873 disable_l2cap_timeouts = 0; 3874 #endif 3875 } 3876 3877 /** 3878 * @brief Configure Bluetooth chipset driver. Has to be called before power on, or right after receiving the local version information 3879 */ 3880 void hci_set_chipset(const btstack_chipset_t *chipset_driver){ 3881 hci_stack->chipset = chipset_driver; 3882 3883 // reset chipset driver - init is also called on power_up 3884 if (hci_stack->chipset && hci_stack->chipset->init){ 3885 hci_stack->chipset->init(hci_stack->config); 3886 } 3887 } 3888 3889 /** 3890 * @brief Configure Bluetooth hardware control. Has to be called after hci_init() but before power on. 3891 */ 3892 void hci_set_control(const btstack_control_t *hardware_control){ 3893 // references to used control implementation 3894 hci_stack->control = hardware_control; 3895 // init with transport config 3896 hardware_control->init(hci_stack->config); 3897 } 3898 3899 static void hci_discard_connections(void){ 3900 btstack_linked_list_iterator_t lit; 3901 btstack_linked_list_iterator_init(&lit, &hci_stack->connections); 3902 while (btstack_linked_list_iterator_has_next(&lit)){ 3903 // cancel all l2cap connections by emitting dicsconnection complete before shutdown (free) connection 3904 hci_connection_t * connection = (hci_connection_t*) btstack_linked_list_iterator_next(&lit); 3905 hci_emit_disconnection_complete(connection->con_handle, 0x16); // terminated by local host 3906 hci_shutdown_connection(connection); 3907 } 3908 } 3909 3910 void hci_close(void){ 3911 3912 #ifdef ENABLE_CLASSIC 3913 // close remote device db 3914 if (hci_stack->link_key_db) { 3915 hci_stack->link_key_db->close(); 3916 } 3917 #endif 3918 3919 hci_discard_connections(); 3920 3921 hci_power_control(HCI_POWER_OFF); 3922 3923 #ifdef HAVE_MALLOC 3924 free(hci_stack); 3925 #endif 3926 hci_stack = NULL; 3927 } 3928 3929 #ifdef HAVE_SCO_TRANSPORT 3930 void hci_set_sco_transport(const btstack_sco_transport_t *sco_transport){ 3931 hci_stack->sco_transport = sco_transport; 3932 sco_transport->register_packet_handler(&packet_handler); 3933 } 3934 #endif 3935 3936 #ifdef ENABLE_CLASSIC 3937 void gap_set_required_encryption_key_size(uint8_t encryption_key_size){ 3938 // validate ranage and set 3939 if (encryption_key_size < 7) return; 3940 if (encryption_key_size > 16) return; 3941 hci_stack->gap_required_encyrption_key_size = encryption_key_size; 3942 } 3943 3944 uint8_t gap_set_security_mode(gap_security_mode_t security_mode){ 3945 if ((security_mode == GAP_SECURITY_MODE_4) || (security_mode == GAP_SECURITY_MODE_2)){ 3946 hci_stack->gap_security_mode = security_mode; 3947 return ERROR_CODE_SUCCESS; 3948 } else { 3949 return ERROR_CODE_UNSUPPORTED_FEATURE_OR_PARAMETER_VALUE; 3950 } 3951 } 3952 3953 gap_security_mode_t gap_get_security_mode(void){ 3954 return hci_stack->gap_security_mode; 3955 } 3956 3957 void gap_set_security_level(gap_security_level_t security_level){ 3958 hci_stack->gap_security_level = security_level; 3959 } 3960 3961 gap_security_level_t gap_get_security_level(void){ 3962 if (hci_stack->gap_secure_connections_only_mode){ 3963 return LEVEL_4; 3964 } 3965 return hci_stack->gap_security_level; 3966 } 3967 3968 void gap_set_minimal_service_security_level(gap_security_level_t security_level){ 3969 hci_stack->gap_minimal_service_security_level = security_level; 3970 } 3971 3972 void gap_set_secure_connections_only_mode(bool enable){ 3973 hci_stack->gap_secure_connections_only_mode = enable; 3974 } 3975 3976 bool gap_get_secure_connections_only_mode(void){ 3977 return hci_stack->gap_secure_connections_only_mode; 3978 } 3979 #endif 3980 3981 #ifdef ENABLE_CLASSIC 3982 void gap_set_class_of_device(uint32_t class_of_device){ 3983 hci_stack->class_of_device = class_of_device; 3984 hci_stack->gap_tasks_classic |= GAP_TASK_SET_CLASS_OF_DEVICE; 3985 hci_run(); 3986 } 3987 3988 void gap_set_default_link_policy_settings(uint16_t default_link_policy_settings){ 3989 hci_stack->default_link_policy_settings = default_link_policy_settings; 3990 hci_stack->gap_tasks_classic |= GAP_TASK_SET_DEFAULT_LINK_POLICY; 3991 hci_run(); 3992 } 3993 3994 void gap_set_allow_role_switch(bool allow_role_switch){ 3995 hci_stack->allow_role_switch = allow_role_switch ? 1 : 0; 3996 } 3997 3998 uint8_t hci_get_allow_role_switch(void){ 3999 return hci_stack->allow_role_switch; 4000 } 4001 4002 void gap_set_link_supervision_timeout(uint16_t link_supervision_timeout){ 4003 hci_stack->link_supervision_timeout = link_supervision_timeout; 4004 } 4005 4006 void gap_enable_link_watchdog(uint16_t timeout_ms){ 4007 hci_stack->automatic_flush_timeout = btstack_min(timeout_ms, 1280) * 8 / 5; // divide by 0.625 4008 } 4009 4010 uint16_t hci_automatic_flush_timeout(void){ 4011 return hci_stack->automatic_flush_timeout; 4012 } 4013 4014 void hci_disable_l2cap_timeout_check(void){ 4015 disable_l2cap_timeouts = 1; 4016 } 4017 #endif 4018 4019 #ifndef HAVE_HOST_CONTROLLER_API 4020 // Set Public BD ADDR - passed on to Bluetooth chipset if supported in bt_control_h 4021 void hci_set_bd_addr(bd_addr_t addr){ 4022 (void)memcpy(hci_stack->custom_bd_addr, addr, 6); 4023 hci_stack->custom_bd_addr_set = 1; 4024 } 4025 #endif 4026 4027 // State-Module-Driver overview 4028 // state module low-level 4029 // HCI_STATE_OFF off close 4030 // HCI_STATE_INITIALIZING, on open 4031 // HCI_STATE_WORKING, on open 4032 // HCI_STATE_HALTING, on open 4033 // HCI_STATE_SLEEPING, off/sleep close 4034 // HCI_STATE_FALLING_ASLEEP on open 4035 4036 static int hci_power_control_on(void){ 4037 4038 // power on 4039 int err = 0; 4040 if (hci_stack->control && hci_stack->control->on){ 4041 err = (*hci_stack->control->on)(); 4042 } 4043 if (err){ 4044 log_error( "POWER_ON failed"); 4045 hci_emit_hci_open_failed(); 4046 return err; 4047 } 4048 4049 // int chipset driver 4050 if (hci_stack->chipset && hci_stack->chipset->init){ 4051 hci_stack->chipset->init(hci_stack->config); 4052 } 4053 4054 // init transport 4055 if (hci_stack->hci_transport->init){ 4056 hci_stack->hci_transport->init(hci_stack->config); 4057 } 4058 4059 // open transport 4060 err = hci_stack->hci_transport->open(); 4061 if (err){ 4062 log_error( "HCI_INIT failed, turning Bluetooth off again"); 4063 if (hci_stack->control && hci_stack->control->off){ 4064 (*hci_stack->control->off)(); 4065 } 4066 hci_emit_hci_open_failed(); 4067 return err; 4068 } 4069 return 0; 4070 } 4071 4072 static void hci_power_control_off(void){ 4073 4074 log_info("hci_power_control_off"); 4075 4076 // close low-level device 4077 hci_stack->hci_transport->close(); 4078 4079 log_info("hci_power_control_off - hci_transport closed"); 4080 4081 // power off 4082 if (hci_stack->control && hci_stack->control->off){ 4083 (*hci_stack->control->off)(); 4084 } 4085 4086 log_info("hci_power_control_off - control closed"); 4087 4088 hci_stack->state = HCI_STATE_OFF; 4089 } 4090 4091 static void hci_power_control_sleep(void){ 4092 4093 log_info("hci_power_control_sleep"); 4094 4095 #if 0 4096 // don't close serial port during sleep 4097 4098 // close low-level device 4099 hci_stack->hci_transport->close(hci_stack->config); 4100 #endif 4101 4102 // sleep mode 4103 if (hci_stack->control && hci_stack->control->sleep){ 4104 (*hci_stack->control->sleep)(); 4105 } 4106 4107 hci_stack->state = HCI_STATE_SLEEPING; 4108 } 4109 4110 static int hci_power_control_wake(void){ 4111 4112 log_info("hci_power_control_wake"); 4113 4114 // wake on 4115 if (hci_stack->control && hci_stack->control->wake){ 4116 (*hci_stack->control->wake)(); 4117 } 4118 4119 #if 0 4120 // open low-level device 4121 int err = hci_stack->hci_transport->open(hci_stack->config); 4122 if (err){ 4123 log_error( "HCI_INIT failed, turning Bluetooth off again"); 4124 if (hci_stack->control && hci_stack->control->off){ 4125 (*hci_stack->control->off)(); 4126 } 4127 hci_emit_hci_open_failed(); 4128 return err; 4129 } 4130 #endif 4131 4132 return 0; 4133 } 4134 4135 static void hci_power_enter_initializing_state(void){ 4136 // set up state machine 4137 hci_stack->num_cmd_packets = 1; // assume that one cmd can be sent 4138 hci_stack->hci_packet_buffer_reserved = false; 4139 hci_stack->state = HCI_STATE_INITIALIZING; 4140 hci_stack->substate = HCI_INIT_SEND_RESET; 4141 } 4142 4143 static void hci_power_enter_halting_state(void){ 4144 #ifdef ENABLE_BLE 4145 hci_whitelist_free(); 4146 #endif 4147 // see hci_run 4148 hci_stack->state = HCI_STATE_HALTING; 4149 hci_stack->substate = HCI_HALTING_CLASSIC_STOP; 4150 // setup watchdog timer for disconnect - only triggers if Controller does not respond anymore 4151 btstack_run_loop_set_timer(&hci_stack->timeout, 1000); 4152 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_halting_timeout_handler); 4153 btstack_run_loop_add_timer(&hci_stack->timeout); 4154 } 4155 4156 // returns error 4157 static int hci_power_control_state_off(HCI_POWER_MODE power_mode){ 4158 int err; 4159 switch (power_mode){ 4160 case HCI_POWER_ON: 4161 err = hci_power_control_on(); 4162 if (err != 0) { 4163 log_error("hci_power_control_on() error %d", err); 4164 return err; 4165 } 4166 hci_power_enter_initializing_state(); 4167 break; 4168 case HCI_POWER_OFF: 4169 // do nothing 4170 break; 4171 case HCI_POWER_SLEEP: 4172 // do nothing (with SLEEP == OFF) 4173 break; 4174 default: 4175 btstack_assert(false); 4176 break; 4177 } 4178 return ERROR_CODE_SUCCESS; 4179 } 4180 4181 static int hci_power_control_state_initializing(HCI_POWER_MODE power_mode){ 4182 switch (power_mode){ 4183 case HCI_POWER_ON: 4184 // do nothing 4185 break; 4186 case HCI_POWER_OFF: 4187 // no connections yet, just turn it off 4188 hci_power_control_off(); 4189 break; 4190 case HCI_POWER_SLEEP: 4191 // no connections yet, just turn it off 4192 hci_power_control_sleep(); 4193 break; 4194 default: 4195 btstack_assert(false); 4196 break; 4197 } 4198 return ERROR_CODE_SUCCESS; 4199 } 4200 4201 static int hci_power_control_state_working(HCI_POWER_MODE power_mode) { 4202 switch (power_mode){ 4203 case HCI_POWER_ON: 4204 // do nothing 4205 break; 4206 case HCI_POWER_OFF: 4207 hci_power_enter_halting_state(); 4208 break; 4209 case HCI_POWER_SLEEP: 4210 // see hci_run 4211 hci_stack->state = HCI_STATE_FALLING_ASLEEP; 4212 hci_stack->substate = HCI_FALLING_ASLEEP_DISCONNECT; 4213 break; 4214 default: 4215 btstack_assert(false); 4216 break; 4217 } 4218 return ERROR_CODE_SUCCESS; 4219 } 4220 4221 static int hci_power_control_state_halting(HCI_POWER_MODE power_mode) { 4222 switch (power_mode){ 4223 case HCI_POWER_ON: 4224 hci_power_enter_initializing_state(); 4225 break; 4226 case HCI_POWER_OFF: 4227 // do nothing 4228 break; 4229 case HCI_POWER_SLEEP: 4230 // see hci_run 4231 hci_stack->state = HCI_STATE_FALLING_ASLEEP; 4232 hci_stack->substate = HCI_FALLING_ASLEEP_DISCONNECT; 4233 break; 4234 default: 4235 btstack_assert(false); 4236 break; 4237 } 4238 return ERROR_CODE_SUCCESS; 4239 } 4240 4241 static int hci_power_control_state_falling_asleep(HCI_POWER_MODE power_mode) { 4242 switch (power_mode){ 4243 case HCI_POWER_ON: 4244 hci_power_enter_initializing_state(); 4245 break; 4246 case HCI_POWER_OFF: 4247 hci_power_enter_halting_state(); 4248 break; 4249 case HCI_POWER_SLEEP: 4250 // do nothing 4251 break; 4252 default: 4253 btstack_assert(false); 4254 break; 4255 } 4256 return ERROR_CODE_SUCCESS; 4257 } 4258 4259 static int hci_power_control_state_sleeping(HCI_POWER_MODE power_mode) { 4260 int err; 4261 switch (power_mode){ 4262 case HCI_POWER_ON: 4263 err = hci_power_control_wake(); 4264 if (err) return err; 4265 hci_power_enter_initializing_state(); 4266 break; 4267 case HCI_POWER_OFF: 4268 hci_power_enter_halting_state(); 4269 break; 4270 case HCI_POWER_SLEEP: 4271 // do nothing 4272 break; 4273 default: 4274 btstack_assert(false); 4275 break; 4276 } 4277 return ERROR_CODE_SUCCESS; 4278 } 4279 4280 int hci_power_control(HCI_POWER_MODE power_mode){ 4281 log_info("hci_power_control: %d, current mode %u", power_mode, hci_stack->state); 4282 int err = 0; 4283 switch (hci_stack->state){ 4284 case HCI_STATE_OFF: 4285 err = hci_power_control_state_off(power_mode); 4286 break; 4287 case HCI_STATE_INITIALIZING: 4288 err = hci_power_control_state_initializing(power_mode); 4289 break; 4290 case HCI_STATE_WORKING: 4291 err = hci_power_control_state_working(power_mode); 4292 break; 4293 case HCI_STATE_HALTING: 4294 err = hci_power_control_state_halting(power_mode); 4295 break; 4296 case HCI_STATE_FALLING_ASLEEP: 4297 err = hci_power_control_state_falling_asleep(power_mode); 4298 break; 4299 case HCI_STATE_SLEEPING: 4300 err = hci_power_control_state_sleeping(power_mode); 4301 break; 4302 default: 4303 btstack_assert(false); 4304 break; 4305 } 4306 if (err != 0){ 4307 return err; 4308 } 4309 4310 // create internal event 4311 hci_emit_state(); 4312 4313 // trigger next/first action 4314 hci_run(); 4315 4316 return 0; 4317 } 4318 4319 4320 static void hci_halting_run(void) { 4321 4322 log_info("HCI_STATE_HALTING, substate %x\n", hci_stack->substate); 4323 4324 hci_connection_t *connection; 4325 bool stop_advertismenets; 4326 4327 switch (hci_stack->substate) { 4328 case HCI_HALTING_CLASSIC_STOP: 4329 #ifdef ENABLE_CLASSIC 4330 if (!hci_can_send_command_packet_now()) return; 4331 4332 if (hci_stack->connectable || hci_stack->discoverable){ 4333 hci_stack->substate = HCI_HALTING_LE_ADV_STOP; 4334 hci_send_cmd(&hci_write_scan_enable, 0); 4335 return; 4336 } 4337 #endif 4338 /* fall through */ 4339 4340 case HCI_HALTING_LE_ADV_STOP: 4341 hci_stack->substate = HCI_HALTING_LE_ADV_STOP; 4342 4343 #ifdef ENABLE_BLE 4344 #ifdef ENABLE_LE_PERIPHERAL 4345 if (!hci_can_send_command_packet_now()) return; 4346 4347 stop_advertismenets = (hci_stack->le_advertisements_state & LE_ADVERTISEMENT_STATE_ACTIVE) != 0; 4348 4349 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 4350 if (hci_extended_advertising_supported()){ 4351 btstack_linked_list_iterator_t it; 4352 btstack_linked_list_iterator_init(&it, &hci_stack->le_advertising_sets); 4353 // stop all periodic advertisements and check if an extended set is active 4354 while (btstack_linked_list_iterator_has_next(&it)){ 4355 le_advertising_set_t * advertising_set = (le_advertising_set_t*) btstack_linked_list_iterator_next(&it); 4356 if ((advertising_set->state & LE_ADVERTISEMENT_STATE_PERIODIC_ACTIVE) != 0) { 4357 advertising_set->state &= ~LE_ADVERTISEMENT_STATE_PERIODIC_ACTIVE; 4358 hci_send_cmd(&hci_le_set_periodic_advertising_enable, 0, advertising_set->advertising_handle); 4359 return; 4360 } 4361 if ((advertising_set->state & LE_ADVERTISEMENT_STATE_ACTIVE) != 0) { 4362 stop_advertismenets = true; 4363 advertising_set->state &= ~LE_ADVERTISEMENT_STATE_ACTIVE; 4364 } 4365 } 4366 if (stop_advertismenets){ 4367 hci_stack->le_advertisements_state &= ~LE_ADVERTISEMENT_STATE_ACTIVE; 4368 hci_send_cmd(&hci_le_set_extended_advertising_enable, 0, 0, NULL, NULL, NULL); 4369 return; 4370 } 4371 } 4372 else 4373 #else 4374 { 4375 if (stop_advertismenets) { 4376 hci_stack->le_advertisements_state &= ~LE_ADVERTISEMENT_STATE_ACTIVE; 4377 hci_send_cmd(&hci_le_set_advertise_enable, 0); 4378 return; 4379 } 4380 } 4381 #endif /* ENABLE_LE_EXTENDED_ADVERTISING*/ 4382 #endif /* ENABLE_LE_PERIPHERAL */ 4383 #endif /* ENABLE_BLE */ 4384 4385 /* fall through */ 4386 4387 case HCI_HALTING_LE_SCAN_STOP: 4388 hci_stack->substate = HCI_HALTING_LE_SCAN_STOP; 4389 if (!hci_can_send_command_packet_now()) return; 4390 4391 #ifdef ENABLE_BLE 4392 #ifdef ENABLE_LE_CENTRAL 4393 if (hci_stack->le_scanning_active){ 4394 hci_le_scan_stop(); 4395 hci_stack->substate = HCI_HALTING_DISCONNECT_ALL; 4396 return; 4397 } 4398 #endif 4399 #endif 4400 4401 /* fall through */ 4402 4403 case HCI_HALTING_DISCONNECT_ALL: 4404 hci_stack->substate = HCI_HALTING_DISCONNECT_ALL; 4405 if (!hci_can_send_command_packet_now()) return; 4406 4407 // close all open connections 4408 connection = (hci_connection_t *) hci_stack->connections; 4409 if (connection) { 4410 hci_con_handle_t con_handle = (uint16_t) connection->con_handle; 4411 4412 // check state 4413 if (connection->state == SENT_DISCONNECT) return; 4414 connection->state = SENT_DISCONNECT; 4415 4416 log_info("HCI_STATE_HALTING, connection %p, handle %u", connection, con_handle); 4417 4418 // finally, send the disconnect command 4419 hci_send_cmd(&hci_disconnect, con_handle, ERROR_CODE_REMOTE_USER_TERMINATED_CONNECTION); 4420 return; 4421 } 4422 4423 btstack_run_loop_remove_timer(&hci_stack->timeout); 4424 4425 hci_stack->substate = HCI_HALTING_READY_FOR_CLOSE; 4426 4427 // no connections left, wait a bit to assert that btstack_cyrpto isn't waiting for an HCI event 4428 log_info("HCI_STATE_HALTING: wait 50 ms"); 4429 hci_stack->substate = HCI_HALTING_W4_CLOSE_TIMER; 4430 btstack_run_loop_set_timer(&hci_stack->timeout, 50); 4431 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_halting_timeout_handler); 4432 btstack_run_loop_add_timer(&hci_stack->timeout); 4433 break; 4434 4435 case HCI_HALTING_CLOSE: 4436 // close left over connections (that had not been properly closed before) 4437 hci_discard_connections(); 4438 4439 log_info("HCI_STATE_HALTING, calling off"); 4440 4441 // switch mode 4442 hci_power_control_off(); 4443 4444 log_info("HCI_STATE_HALTING, emitting state"); 4445 hci_emit_state(); 4446 log_info("HCI_STATE_HALTING, done"); 4447 break; 4448 4449 case HCI_HALTING_W4_CLOSE_TIMER: 4450 // keep waiting 4451 4452 break; 4453 default: 4454 break; 4455 } 4456 }; 4457 4458 static void hci_falling_asleep_run(void){ 4459 hci_connection_t * connection; 4460 switch(hci_stack->substate) { 4461 case HCI_FALLING_ASLEEP_DISCONNECT: 4462 log_info("HCI_STATE_FALLING_ASLEEP"); 4463 // close all open connections 4464 connection = (hci_connection_t *) hci_stack->connections; 4465 if (connection){ 4466 4467 // send disconnect 4468 if (!hci_can_send_command_packet_now()) return; 4469 4470 log_info("HCI_STATE_FALLING_ASLEEP, connection %p, handle %u", connection, (uint16_t)connection->con_handle); 4471 hci_send_cmd(&hci_disconnect, connection->con_handle, ERROR_CODE_REMOTE_USER_TERMINATED_CONNECTION); 4472 4473 // send disconnected event right away - causes higher layer connections to get closed, too. 4474 hci_shutdown_connection(connection); 4475 return; 4476 } 4477 4478 if (hci_classic_supported()){ 4479 // disable page and inquiry scan 4480 if (!hci_can_send_command_packet_now()) return; 4481 4482 log_info("HCI_STATE_HALTING, disabling inq scans"); 4483 hci_send_cmd(&hci_write_scan_enable, hci_stack->connectable << 1); // drop inquiry scan but keep page scan 4484 4485 // continue in next sub state 4486 hci_stack->substate = HCI_FALLING_ASLEEP_W4_WRITE_SCAN_ENABLE; 4487 break; 4488 } 4489 4490 /* fall through */ 4491 4492 case HCI_FALLING_ASLEEP_COMPLETE: 4493 log_info("HCI_STATE_HALTING, calling sleep"); 4494 // switch mode 4495 hci_power_control_sleep(); // changes hci_stack->state to SLEEP 4496 hci_emit_state(); 4497 break; 4498 4499 default: 4500 break; 4501 } 4502 } 4503 4504 #ifdef ENABLE_CLASSIC 4505 4506 static void hci_update_scan_enable(void){ 4507 // 2 = page scan, 1 = inq scan 4508 hci_stack->new_scan_enable_value = (hci_stack->connectable << 1) | hci_stack->discoverable; 4509 hci_stack->gap_tasks_classic |= GAP_TASK_WRITE_SCAN_ENABLE; 4510 hci_run(); 4511 } 4512 4513 void gap_discoverable_control(uint8_t enable){ 4514 if (enable) enable = 1; // normalize argument 4515 4516 if (hci_stack->discoverable == enable){ 4517 hci_emit_discoverable_enabled(hci_stack->discoverable); 4518 return; 4519 } 4520 4521 hci_stack->discoverable = enable; 4522 hci_update_scan_enable(); 4523 } 4524 4525 void gap_connectable_control(uint8_t enable){ 4526 if (enable) enable = 1; // normalize argument 4527 4528 // don't emit event 4529 if (hci_stack->connectable == enable) return; 4530 4531 hci_stack->connectable = enable; 4532 hci_update_scan_enable(); 4533 } 4534 #endif 4535 4536 void gap_local_bd_addr(bd_addr_t address_buffer){ 4537 (void)memcpy(address_buffer, hci_stack->local_bd_addr, 6); 4538 } 4539 4540 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 4541 static void hci_host_num_completed_packets(void){ 4542 4543 // create packet manually as arrays are not supported and num_commands should not get reduced 4544 hci_reserve_packet_buffer(); 4545 uint8_t * packet = hci_get_outgoing_packet_buffer(); 4546 4547 uint16_t size = 0; 4548 uint16_t num_handles = 0; 4549 packet[size++] = 0x35; 4550 packet[size++] = 0x0c; 4551 size++; // skip param len 4552 size++; // skip num handles 4553 4554 // add { handle, packets } entries 4555 btstack_linked_item_t * it; 4556 for (it = (btstack_linked_item_t *) hci_stack->connections; it ; it = it->next){ 4557 hci_connection_t * connection = (hci_connection_t *) it; 4558 if (connection->num_packets_completed){ 4559 little_endian_store_16(packet, size, connection->con_handle); 4560 size += 2; 4561 little_endian_store_16(packet, size, connection->num_packets_completed); 4562 size += 2; 4563 // 4564 num_handles++; 4565 connection->num_packets_completed = 0; 4566 } 4567 } 4568 4569 packet[2] = size - 3; 4570 packet[3] = num_handles; 4571 4572 hci_stack->host_completed_packets = 0; 4573 4574 hci_dump_packet(HCI_COMMAND_DATA_PACKET, 0, packet, size); 4575 hci_stack->hci_transport->send_packet(HCI_COMMAND_DATA_PACKET, packet, size); 4576 4577 // release packet buffer for synchronous transport implementations 4578 if (hci_transport_synchronous()){ 4579 hci_release_packet_buffer(); 4580 hci_emit_transport_packet_sent(); 4581 } 4582 } 4583 #endif 4584 4585 static void hci_halting_timeout_handler(btstack_timer_source_t * ds){ 4586 UNUSED(ds); 4587 hci_stack->substate = HCI_HALTING_CLOSE; 4588 // allow packet handlers to defer final shutdown 4589 hci_emit_state(); 4590 hci_run(); 4591 } 4592 4593 static bool hci_run_acl_fragments(void){ 4594 if (hci_stack->acl_fragmentation_total_size > 0u) { 4595 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(hci_stack->hci_packet_buffer); 4596 hci_connection_t *connection = hci_connection_for_handle(con_handle); 4597 if (connection) { 4598 if (hci_can_send_prepared_acl_packet_now(con_handle)){ 4599 hci_send_acl_packet_fragments(connection); 4600 return true; 4601 } 4602 } else { 4603 // connection gone -> discard further fragments 4604 log_info("hci_run: fragmented ACL packet no connection -> discard fragment"); 4605 hci_stack->acl_fragmentation_total_size = 0; 4606 hci_stack->acl_fragmentation_pos = 0; 4607 } 4608 } 4609 return false; 4610 } 4611 4612 #ifdef ENABLE_CLASSIC 4613 4614 #ifdef ENABLE_HCI_SERIALIZED_CONTROLLER_OPERATIONS 4615 static bool hci_classic_operation_active(void) { 4616 if (hci_stack->inquiry_state >= GAP_INQUIRY_STATE_W4_ACTIVE){ 4617 return true; 4618 } 4619 if (hci_stack->remote_name_state == GAP_REMOTE_NAME_STATE_W4_COMPLETE){ 4620 return true; 4621 } 4622 btstack_linked_item_t * it; 4623 for (it = (btstack_linked_item_t *) hci_stack->connections; it != NULL; it = it->next) { 4624 hci_connection_t *connection = (hci_connection_t *) it; 4625 switch (connection->state) { 4626 case SENT_CREATE_CONNECTION: 4627 case SENT_CANCEL_CONNECTION: 4628 case SENT_DISCONNECT: 4629 return true; 4630 default: 4631 break; 4632 } 4633 } 4634 return false; 4635 } 4636 #endif 4637 4638 static bool hci_run_general_gap_classic(void){ 4639 4640 // assert stack is working and classic is active 4641 if (hci_classic_supported() == false) return false; 4642 if (hci_stack->state != HCI_STATE_WORKING) return false; 4643 4644 // decline incoming connections 4645 if (hci_stack->decline_reason){ 4646 uint8_t reason = hci_stack->decline_reason; 4647 hci_stack->decline_reason = 0; 4648 hci_send_cmd(&hci_reject_connection_request, hci_stack->decline_addr, reason); 4649 return true; 4650 } 4651 4652 if (hci_stack->gap_tasks_classic != 0){ 4653 hci_run_gap_tasks_classic(); 4654 return true; 4655 } 4656 4657 // start/stop inquiry 4658 if ((hci_stack->inquiry_state >= GAP_INQUIRY_DURATION_MIN) && (hci_stack->inquiry_state <= GAP_INQUIRY_DURATION_MAX)){ 4659 #ifdef ENABLE_HCI_SERIALIZED_CONTROLLER_OPERATIONS 4660 if (hci_classic_operation_active() == false) 4661 #endif 4662 { 4663 uint8_t duration = hci_stack->inquiry_state; 4664 hci_stack->inquiry_state = GAP_INQUIRY_STATE_W4_ACTIVE; 4665 hci_send_cmd(&hci_inquiry, hci_stack->inquiry_lap, duration, 0); 4666 return true; 4667 } 4668 } 4669 if (hci_stack->inquiry_state == GAP_INQUIRY_STATE_W2_CANCEL){ 4670 hci_stack->inquiry_state = GAP_INQUIRY_STATE_W4_CANCELLED; 4671 hci_send_cmd(&hci_inquiry_cancel); 4672 return true; 4673 } 4674 // remote name request 4675 if (hci_stack->remote_name_state == GAP_REMOTE_NAME_STATE_W2_SEND){ 4676 #ifdef ENABLE_HCI_SERIALIZED_CONTROLLER_OPERATIONS 4677 if (hci_classic_operation_active() == false) 4678 #endif 4679 { 4680 hci_stack->remote_name_state = GAP_REMOTE_NAME_STATE_W4_COMPLETE; 4681 hci_send_cmd(&hci_remote_name_request, hci_stack->remote_name_addr, 4682 hci_stack->remote_name_page_scan_repetition_mode, 0, hci_stack->remote_name_clock_offset); 4683 return true; 4684 } 4685 } 4686 #ifdef ENABLE_CLASSIC_PAIRING_OOB 4687 // Local OOB data 4688 if (hci_stack->classic_read_local_oob_data){ 4689 hci_stack->classic_read_local_oob_data = false; 4690 if (hci_command_supported(SUPPORTED_HCI_COMMAND_READ_LOCAL_OOB_EXTENDED_DATA_COMMAND)){ 4691 hci_send_cmd(&hci_read_local_extended_oob_data); 4692 } else { 4693 hci_send_cmd(&hci_read_local_oob_data); 4694 } 4695 } 4696 #endif 4697 // pairing 4698 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE){ 4699 uint8_t state = hci_stack->gap_pairing_state; 4700 uint8_t pin_code[16]; 4701 switch (state){ 4702 case GAP_PAIRING_STATE_SEND_PIN: 4703 hci_stack->gap_pairing_state = GAP_PAIRING_STATE_IDLE; 4704 memset(pin_code, 0, 16); 4705 memcpy(pin_code, hci_stack->gap_pairing_input.gap_pairing_pin, hci_stack->gap_pairing_pin_len); 4706 hci_send_cmd(&hci_pin_code_request_reply, hci_stack->gap_pairing_addr, hci_stack->gap_pairing_pin_len, pin_code); 4707 break; 4708 case GAP_PAIRING_STATE_SEND_PIN_NEGATIVE: 4709 hci_stack->gap_pairing_state = GAP_PAIRING_STATE_WAIT_FOR_COMMAND_COMPLETE; 4710 hci_send_cmd(&hci_pin_code_request_negative_reply, hci_stack->gap_pairing_addr); 4711 break; 4712 case GAP_PAIRING_STATE_SEND_PASSKEY: 4713 hci_stack->gap_pairing_state = GAP_PAIRING_STATE_IDLE; 4714 hci_send_cmd(&hci_user_passkey_request_reply, hci_stack->gap_pairing_addr, hci_stack->gap_pairing_input.gap_pairing_passkey); 4715 break; 4716 case GAP_PAIRING_STATE_SEND_PASSKEY_NEGATIVE: 4717 hci_stack->gap_pairing_state = GAP_PAIRING_STATE_WAIT_FOR_COMMAND_COMPLETE; 4718 hci_send_cmd(&hci_user_passkey_request_negative_reply, hci_stack->gap_pairing_addr); 4719 break; 4720 case GAP_PAIRING_STATE_SEND_CONFIRMATION: 4721 hci_stack->gap_pairing_state = GAP_PAIRING_STATE_IDLE; 4722 hci_send_cmd(&hci_user_confirmation_request_reply, hci_stack->gap_pairing_addr); 4723 break; 4724 case GAP_PAIRING_STATE_SEND_CONFIRMATION_NEGATIVE: 4725 hci_stack->gap_pairing_state = GAP_PAIRING_STATE_WAIT_FOR_COMMAND_COMPLETE; 4726 hci_send_cmd(&hci_user_confirmation_request_negative_reply, hci_stack->gap_pairing_addr); 4727 break; 4728 default: 4729 break; 4730 } 4731 return true; 4732 } 4733 return false; 4734 } 4735 #endif 4736 4737 #ifdef ENABLE_BLE 4738 4739 #ifdef ENABLE_LE_CENTRAL 4740 static void hci_le_scan_stop(void){ 4741 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 4742 if (hci_extended_advertising_supported()) { 4743 hci_send_cmd(&hci_le_set_extended_scan_enable, 0, 0, 0, 0); 4744 } else 4745 #endif 4746 { 4747 hci_send_cmd(&hci_le_set_scan_enable, 0, 0); 4748 } 4749 } 4750 #endif 4751 4752 #ifdef ENABLE_LE_PERIPHERAL 4753 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 4754 uint8_t hci_le_extended_advertising_operation_for_chunk(uint16_t pos, uint16_t len){ 4755 uint8_t operation = 0; 4756 if (pos == 0){ 4757 // first fragment or complete data 4758 operation |= 1; 4759 } 4760 if (pos + LE_EXTENDED_ADVERTISING_MAX_CHUNK_LEN >= len){ 4761 // last fragment or complete data 4762 operation |= 2; 4763 } 4764 return operation; 4765 } 4766 #endif 4767 #endif 4768 4769 static bool hci_run_general_gap_le(void){ 4770 4771 // Phase 1: collect what to stop 4772 4773 bool scanning_stop = false; 4774 bool connecting_stop = false; 4775 bool advertising_stop = false; 4776 4777 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 4778 le_advertising_set_t * advertising_stop_set = NULL; 4779 bool periodic_stop = false; 4780 #endif 4781 4782 #ifndef ENABLE_LE_CENTRAL 4783 UNUSED(scanning_stop); 4784 UNUSED(connecting_stop); 4785 #endif 4786 #ifndef ENABLE_LE_PERIPHERAL 4787 UNUSED(advertising_stop); 4788 #endif 4789 4790 // check if own address changes 4791 bool random_address_change = (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_ADDRESS) != 0; 4792 4793 // check if whitelist needs modification 4794 bool whitelist_modification_pending = false; 4795 btstack_linked_list_iterator_t lit; 4796 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 4797 while (btstack_linked_list_iterator_has_next(&lit)){ 4798 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&lit); 4799 if (entry->state & (LE_WHITELIST_REMOVE_FROM_CONTROLLER | LE_WHITELIST_ADD_TO_CONTROLLER)){ 4800 whitelist_modification_pending = true; 4801 break; 4802 } 4803 } 4804 // check if resolving list needs modification 4805 bool resolving_list_modification_pending = false; 4806 #ifdef ENABLE_LE_PRIVACY_ADDRESS_RESOLUTION 4807 4808 bool resolving_list_supported = hci_command_supported(SUPPORTED_HCI_COMMAND_LE_SET_ADDRESS_RESOLUTION_ENABLE); 4809 if (resolving_list_supported && hci_stack->le_resolving_list_state != LE_RESOLVING_LIST_DONE){ 4810 resolving_list_modification_pending = true; 4811 } 4812 #endif 4813 4814 #ifdef ENABLE_LE_CENTRAL 4815 // scanning control 4816 if (hci_stack->le_scanning_active) { 4817 // stop if: 4818 // - parameter change required 4819 // - it's disabled 4820 // - whitelist change required but used for scanning 4821 // - resolving list modified 4822 // - own address changes 4823 bool scanning_uses_whitelist = (hci_stack->le_scan_filter_policy & 1) == 1; 4824 if ((hci_stack->le_scanning_param_update) || 4825 !hci_stack->le_scanning_enabled || 4826 scanning_uses_whitelist || 4827 resolving_list_modification_pending || 4828 random_address_change){ 4829 4830 scanning_stop = true; 4831 } 4832 } 4833 #endif 4834 4835 #ifdef ENABLE_LE_CENTRAL 4836 // connecting control 4837 bool connecting_with_whitelist; 4838 switch (hci_stack->le_connecting_state){ 4839 case LE_CONNECTING_DIRECT: 4840 case LE_CONNECTING_WHITELIST: 4841 // stop connecting if: 4842 // - connecting uses white and whitelist modification pending 4843 // - if it got disabled 4844 // - resolving list modified 4845 // - own address changes 4846 connecting_with_whitelist = hci_stack->le_connecting_state == LE_CONNECTING_WHITELIST; 4847 if ((connecting_with_whitelist && whitelist_modification_pending) || 4848 (hci_stack->le_connecting_request == LE_CONNECTING_IDLE) || 4849 resolving_list_modification_pending || 4850 random_address_change) { 4851 4852 connecting_stop = true; 4853 } 4854 break; 4855 default: 4856 break; 4857 } 4858 #endif 4859 4860 #ifdef ENABLE_LE_PERIPHERAL 4861 // le advertisement control 4862 if ((hci_stack->le_advertisements_state & LE_ADVERTISEMENT_STATE_ACTIVE) != 0){ 4863 // stop if: 4864 // - parameter change required 4865 // - random address used in advertising and changes 4866 // - it's disabled 4867 // - whitelist change required but used for advertisement filter policy 4868 // - resolving list modified 4869 // - own address changes 4870 bool advertising_uses_whitelist = hci_stack->le_advertisements_filter_policy != 0; 4871 bool advertising_uses_random_address = hci_stack->le_own_addr_type != BD_ADDR_TYPE_LE_PUBLIC; 4872 bool advertising_change = (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_PARAMS) != 0; 4873 if (advertising_change || 4874 (advertising_uses_random_address && random_address_change) || 4875 (hci_stack->le_advertisements_enabled_for_current_roles == 0) || 4876 (advertising_uses_whitelist && whitelist_modification_pending) || 4877 resolving_list_modification_pending || 4878 random_address_change) { 4879 4880 advertising_stop = true; 4881 } 4882 } 4883 4884 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 4885 if (hci_extended_advertising_supported() && (advertising_stop == false)){ 4886 btstack_linked_list_iterator_t it; 4887 btstack_linked_list_iterator_init(&it, &hci_stack->le_advertising_sets); 4888 while (btstack_linked_list_iterator_has_next(&it)){ 4889 le_advertising_set_t * advertising_set = (le_advertising_set_t*) btstack_linked_list_iterator_next(&it); 4890 if ((advertising_set->state & LE_ADVERTISEMENT_STATE_ACTIVE) != 0) { 4891 // stop if: 4892 // - parameter change required 4893 // - random address used in connectable advertising and changes 4894 // - it's disabled 4895 // - whitelist change required but used for advertisement filter policy 4896 // - resolving list modified 4897 // - own address changes 4898 // - advertisement set will be removed 4899 bool advertising_uses_whitelist = advertising_set->extended_params.advertising_filter_policy != 0; 4900 bool advertising_connectable = (advertising_set->extended_params.advertising_event_properties & 1) != 0; 4901 bool advertising_uses_random_address = 4902 (advertising_set->extended_params.own_address_type != BD_ADDR_TYPE_LE_PUBLIC) && 4903 advertising_connectable; 4904 bool advertising_parameter_change = (advertising_set->tasks & LE_ADVERTISEMENT_TASKS_SET_PARAMS) != 0; 4905 bool advertising_enabled = (advertising_set->state & LE_ADVERTISEMENT_STATE_ENABLED) != 0; 4906 bool advertising_set_random_address_change = 4907 (advertising_set->tasks & LE_ADVERTISEMENT_TASKS_SET_ADDRESS) != 0; 4908 bool advertising_set_will_be_removed = 4909 (advertising_set->state & LE_ADVERTISEMENT_TASKS_REMOVE_SET) != 0; 4910 if (advertising_parameter_change || 4911 (advertising_uses_random_address && advertising_set_random_address_change) || 4912 (advertising_enabled == false) || 4913 (advertising_uses_whitelist && whitelist_modification_pending) || 4914 resolving_list_modification_pending || 4915 advertising_set_will_be_removed) { 4916 4917 advertising_stop = true; 4918 advertising_stop_set = advertising_set; 4919 break; 4920 } 4921 } 4922 if ((advertising_set->state & LE_ADVERTISEMENT_STATE_PERIODIC_ACTIVE) != 0) { 4923 // stop if: 4924 // - it's disabled 4925 // - parameter change required 4926 bool periodic_enabled = (advertising_set->state & LE_ADVERTISEMENT_STATE_PERIODIC_ENABLED) != 0; 4927 bool periodic_parameter_change = (advertising_set->tasks & LE_ADVERTISEMENT_TASKS_SET_PERIODIC_PARAMS) != 0; 4928 if ((periodic_enabled == false) || periodic_parameter_change){ 4929 periodic_stop = true; 4930 advertising_stop_set = advertising_set; 4931 } 4932 } 4933 } 4934 } 4935 #endif 4936 4937 #endif 4938 4939 4940 // Phase 2: stop everything that should be off during modifications 4941 4942 #ifdef ENABLE_LE_CENTRAL 4943 if (scanning_stop){ 4944 hci_stack->le_scanning_active = false; 4945 hci_le_scan_stop(); 4946 return true; 4947 } 4948 #endif 4949 4950 #ifdef ENABLE_LE_CENTRAL 4951 if (connecting_stop){ 4952 hci_send_cmd(&hci_le_create_connection_cancel); 4953 return true; 4954 } 4955 #endif 4956 4957 #ifdef ENABLE_LE_PERIPHERAL 4958 if (advertising_stop){ 4959 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 4960 if (hci_extended_advertising_supported()) { 4961 uint8_t advertising_stop_handle; 4962 if (advertising_stop_set != NULL){ 4963 advertising_stop_handle = advertising_stop_set->advertising_handle; 4964 advertising_stop_set->state &= ~LE_ADVERTISEMENT_STATE_ACTIVE; 4965 } else { 4966 advertising_stop_handle = 0; 4967 hci_stack->le_advertisements_state &= ~LE_ADVERTISEMENT_STATE_ACTIVE; 4968 } 4969 const uint8_t advertising_handles[] = { advertising_stop_handle }; 4970 const uint16_t durations[] = { 0 }; 4971 const uint16_t max_events[] = { 0 }; 4972 hci_send_cmd(&hci_le_set_extended_advertising_enable, 0, 1, advertising_handles, durations, max_events); 4973 } else 4974 #endif 4975 { 4976 hci_stack->le_advertisements_state &= ~LE_ADVERTISEMENT_STATE_ACTIVE; 4977 hci_send_cmd(&hci_le_set_advertise_enable, 0); 4978 } 4979 return true; 4980 } 4981 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 4982 if (periodic_stop){ 4983 advertising_stop_set->state &= ~LE_ADVERTISEMENT_STATE_PERIODIC_ACTIVE; 4984 hci_send_cmd(&hci_le_set_periodic_advertising_enable, 0, advertising_stop_set->advertising_handle); 4985 return true; 4986 } 4987 #endif 4988 #endif 4989 4990 // Phase 3: modify 4991 4992 if (random_address_change){ 4993 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_SET_ADDRESS; 4994 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 4995 if (hci_extended_advertising_supported()) { 4996 hci_send_cmd(&hci_le_set_advertising_set_random_address, 0, hci_stack->le_random_address); 4997 } 4998 #endif 4999 { 5000 hci_send_cmd(&hci_le_set_random_address, hci_stack->le_random_address); 5001 } 5002 return true; 5003 } 5004 5005 #ifdef ENABLE_LE_CENTRAL 5006 if (hci_stack->le_scanning_param_update){ 5007 hci_stack->le_scanning_param_update = false; 5008 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 5009 if (hci_extended_advertising_supported()){ 5010 // prepare arrays for all PHYs 5011 uint8_t scan_types[1] = { hci_stack->le_scan_type }; 5012 uint16_t scan_intervals[1] = { hci_stack->le_scan_interval }; 5013 uint16_t scan_windows[1] = { hci_stack->le_scan_window }; 5014 uint8_t scanning_phys = 1; // LE 1M PHY 5015 hci_send_cmd(&hci_le_set_extended_scan_parameters, hci_stack->le_own_addr_type, 5016 hci_stack->le_scan_filter_policy, scanning_phys, scan_types, scan_intervals, scan_windows); 5017 } else 5018 #endif 5019 { 5020 hci_send_cmd(&hci_le_set_scan_parameters, hci_stack->le_scan_type, hci_stack->le_scan_interval, hci_stack->le_scan_window, 5021 hci_stack->le_own_addr_type, hci_stack->le_scan_filter_policy); 5022 } 5023 return true; 5024 } 5025 #endif 5026 5027 #ifdef ENABLE_LE_PERIPHERAL 5028 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_PARAMS){ 5029 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_SET_PARAMS; 5030 hci_stack->le_advertisements_own_addr_type = hci_stack->le_own_addr_type; 5031 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 5032 if (hci_extended_advertising_supported()){ 5033 // map advertisment type to advertising event properties 5034 uint16_t adv_event_properties = 0; 5035 const uint16_t mapping[] = { 0b00010011, 0b00010101, 0b00011101, 0b00010010, 0b00010000}; 5036 if (hci_stack->le_advertisements_type < (sizeof(mapping)/sizeof(uint16_t))){ 5037 adv_event_properties = mapping[hci_stack->le_advertisements_type]; 5038 } 5039 hci_stack->le_advertising_set_in_current_command = 0; 5040 hci_send_cmd(&hci_le_set_extended_advertising_parameters, 5041 0, 5042 adv_event_properties, 5043 hci_stack->le_advertisements_interval_min, 5044 hci_stack->le_advertisements_interval_max, 5045 hci_stack->le_advertisements_channel_map, 5046 hci_stack->le_advertisements_own_addr_type, 5047 hci_stack->le_advertisements_direct_address_type, 5048 hci_stack->le_advertisements_direct_address, 5049 hci_stack->le_advertisements_filter_policy, 5050 0x7f, // tx power: no preference 5051 0x01, // primary adv phy: LE 1M 5052 0, // secondary adv max skip 5053 0, // secondary adv phy 5054 0, // adv sid 5055 0 // scan request notification 5056 ); 5057 } 5058 #endif 5059 { 5060 hci_send_cmd(&hci_le_set_advertising_parameters, 5061 hci_stack->le_advertisements_interval_min, 5062 hci_stack->le_advertisements_interval_max, 5063 hci_stack->le_advertisements_type, 5064 hci_stack->le_advertisements_own_addr_type, 5065 hci_stack->le_advertisements_direct_address_type, 5066 hci_stack->le_advertisements_direct_address, 5067 hci_stack->le_advertisements_channel_map, 5068 hci_stack->le_advertisements_filter_policy); 5069 } 5070 return true; 5071 } 5072 5073 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_ADV_DATA){ 5074 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_SET_ADV_DATA; 5075 uint8_t adv_data_clean[31]; 5076 memset(adv_data_clean, 0, sizeof(adv_data_clean)); 5077 (void)memcpy(adv_data_clean, hci_stack->le_advertisements_data, 5078 hci_stack->le_advertisements_data_len); 5079 btstack_replace_bd_addr_placeholder(adv_data_clean, hci_stack->le_advertisements_data_len, hci_stack->local_bd_addr); 5080 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 5081 if (hci_extended_advertising_supported()){ 5082 hci_stack->le_advertising_set_in_current_command = 0; 5083 hci_send_cmd(&hci_le_set_extended_advertising_data, 0, 0x03, 0x01, hci_stack->le_advertisements_data_len, adv_data_clean); 5084 } else 5085 #endif 5086 { 5087 hci_send_cmd(&hci_le_set_advertising_data, hci_stack->le_advertisements_data_len, adv_data_clean); 5088 } 5089 return true; 5090 } 5091 5092 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA){ 5093 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA; 5094 uint8_t scan_data_clean[31]; 5095 memset(scan_data_clean, 0, sizeof(scan_data_clean)); 5096 (void)memcpy(scan_data_clean, hci_stack->le_scan_response_data, 5097 hci_stack->le_scan_response_data_len); 5098 btstack_replace_bd_addr_placeholder(scan_data_clean, hci_stack->le_scan_response_data_len, hci_stack->local_bd_addr); 5099 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 5100 if (hci_extended_advertising_supported()){ 5101 hci_stack->le_advertising_set_in_current_command = 0; 5102 hci_send_cmd(&hci_le_set_extended_scan_response_data, 0, 0x03, 0x01, hci_stack->le_scan_response_data_len, scan_data_clean); 5103 } else 5104 #endif 5105 { 5106 hci_send_cmd(&hci_le_set_scan_response_data, hci_stack->le_scan_response_data_len, scan_data_clean); 5107 } 5108 return true; 5109 } 5110 5111 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 5112 if (hci_extended_advertising_supported()) { 5113 btstack_linked_list_iterator_t it; 5114 btstack_linked_list_iterator_init(&it, &hci_stack->le_advertising_sets); 5115 while (btstack_linked_list_iterator_has_next(&it)){ 5116 le_advertising_set_t * advertising_set = (le_advertising_set_t*) btstack_linked_list_iterator_next(&it); 5117 if ((advertising_set->tasks & LE_ADVERTISEMENT_TASKS_REMOVE_SET) != 0) { 5118 advertising_set->tasks &= ~LE_ADVERTISEMENT_TASKS_REMOVE_SET; 5119 hci_stack->le_advertising_set_in_current_command = advertising_set->advertising_handle; 5120 hci_send_cmd(&hci_le_remove_advertising_set, advertising_set->advertising_handle); 5121 return true; 5122 } 5123 if ((advertising_set->tasks & LE_ADVERTISEMENT_TASKS_SET_ADDRESS) != 0){ 5124 advertising_set->tasks &= ~LE_ADVERTISEMENT_TASKS_SET_ADDRESS; 5125 hci_send_cmd(&hci_le_set_advertising_set_random_address, advertising_set->advertising_handle, advertising_set->random_address); 5126 return true; 5127 } 5128 if ((advertising_set->tasks & LE_ADVERTISEMENT_TASKS_SET_PARAMS) != 0){ 5129 advertising_set->tasks &= ~LE_ADVERTISEMENT_TASKS_SET_PARAMS; 5130 hci_stack->le_advertising_set_in_current_command = advertising_set->advertising_handle; 5131 hci_send_cmd(&hci_le_set_extended_advertising_parameters, 5132 advertising_set->advertising_handle, 5133 advertising_set->extended_params.advertising_event_properties, 5134 advertising_set->extended_params.primary_advertising_interval_min, 5135 advertising_set->extended_params.primary_advertising_interval_max, 5136 advertising_set->extended_params.primary_advertising_channel_map, 5137 advertising_set->extended_params.own_address_type, 5138 advertising_set->extended_params.peer_address_type, 5139 advertising_set->extended_params.peer_address, 5140 advertising_set->extended_params.advertising_filter_policy, 5141 advertising_set->extended_params.advertising_tx_power, 5142 advertising_set->extended_params.primary_advertising_phy, 5143 advertising_set->extended_params.secondary_advertising_max_skip, 5144 advertising_set->extended_params.secondary_advertising_phy, 5145 advertising_set->extended_params.advertising_sid, 5146 advertising_set->extended_params.scan_request_notification_enable 5147 ); 5148 return true; 5149 } 5150 if ((advertising_set->tasks & LE_ADVERTISEMENT_TASKS_SET_ADV_DATA) != 0) { 5151 uint16_t pos = advertising_set->adv_data_pos; 5152 uint8_t operation = hci_le_extended_advertising_operation_for_chunk(pos, advertising_set->adv_data_len); 5153 uint16_t data_to_upload = btstack_min(advertising_set->adv_data_len - pos, LE_EXTENDED_ADVERTISING_MAX_CHUNK_LEN); 5154 if ((operation & 0x02) != 0){ 5155 // last fragment or complete data 5156 operation |= 2; 5157 advertising_set->adv_data_pos = 0; 5158 advertising_set->tasks &= ~LE_ADVERTISEMENT_TASKS_SET_ADV_DATA; 5159 } else { 5160 advertising_set->adv_data_pos += data_to_upload; 5161 } 5162 hci_stack->le_advertising_set_in_current_command = advertising_set->advertising_handle; 5163 hci_send_cmd(&hci_le_set_extended_advertising_data, advertising_set->advertising_handle, operation, 0x01, data_to_upload, &advertising_set->adv_data[pos]); 5164 return true; 5165 } 5166 if ((advertising_set->tasks & LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA) != 0) { 5167 uint16_t pos = advertising_set->scan_data_pos; 5168 uint8_t operation = hci_le_extended_advertising_operation_for_chunk(pos, advertising_set->scan_data_len); 5169 uint16_t data_to_upload = btstack_min(advertising_set->scan_data_len - pos, LE_EXTENDED_ADVERTISING_MAX_CHUNK_LEN); 5170 if ((operation & 0x02) != 0){ 5171 advertising_set->scan_data_pos = 0; 5172 advertising_set->tasks &= ~LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA; 5173 } else { 5174 advertising_set->scan_data_pos += data_to_upload; 5175 } 5176 hci_stack->le_advertising_set_in_current_command = advertising_set->advertising_handle; 5177 hci_send_cmd(&hci_le_set_extended_scan_response_data, operation, 0x03, 0x01, data_to_upload, &advertising_set->scan_data[pos]); 5178 return true; 5179 } 5180 if ((advertising_set->tasks & LE_ADVERTISEMENT_TASKS_SET_PERIODIC_PARAMS) != 0){ 5181 advertising_set->tasks &= ~LE_ADVERTISEMENT_TASKS_SET_PERIODIC_PARAMS; 5182 hci_stack->le_advertising_set_in_current_command = advertising_set->advertising_handle; 5183 hci_send_cmd(&hci_le_set_periodic_advertising_parameters, 5184 advertising_set->advertising_handle, 5185 advertising_set->periodic_params.periodic_advertising_interval_min, 5186 advertising_set->periodic_params.periodic_advertising_interval_max, 5187 advertising_set->periodic_params.periodic_advertising_properties); 5188 return true; 5189 } 5190 if ((advertising_set->tasks & LE_ADVERTISEMENT_TASKS_SET_PERIODIC_DATA) != 0) { 5191 uint16_t pos = advertising_set->periodic_data_pos; 5192 uint8_t operation = hci_le_extended_advertising_operation_for_chunk(pos, advertising_set->periodic_data_len); 5193 uint16_t data_to_upload = btstack_min(advertising_set->periodic_data_len - pos, LE_EXTENDED_ADVERTISING_MAX_CHUNK_LEN); 5194 if ((operation & 0x02) != 0){ 5195 // last fragment or complete data 5196 operation |= 2; 5197 advertising_set->periodic_data_pos = 0; 5198 advertising_set->tasks &= ~LE_ADVERTISEMENT_TASKS_SET_PERIODIC_DATA; 5199 } else { 5200 advertising_set->periodic_data_pos += data_to_upload; 5201 } 5202 hci_stack->le_advertising_set_in_current_command = advertising_set->advertising_handle; 5203 hci_send_cmd(&hci_le_set_periodic_advertising_data, advertising_set->advertising_handle, operation, data_to_upload, &advertising_set->periodic_data[pos]); 5204 return true; 5205 } 5206 } 5207 } 5208 #endif 5209 5210 5211 #endif 5212 5213 5214 #ifdef ENABLE_LE_CENTRAL 5215 // if connect with whitelist was active and is not cancelled yet, wait until next time 5216 if (hci_stack->le_connecting_state == LE_CONNECTING_CANCEL) return false; 5217 #endif 5218 5219 // LE Whitelist Management 5220 if (whitelist_modification_pending){ 5221 // add/remove entries 5222 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 5223 while (btstack_linked_list_iterator_has_next(&lit)){ 5224 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&lit); 5225 if (entry->state & LE_WHITELIST_REMOVE_FROM_CONTROLLER){ 5226 entry->state &= ~LE_WHITELIST_REMOVE_FROM_CONTROLLER; 5227 hci_send_cmd(&hci_le_remove_device_from_white_list, entry->address_type, entry->address); 5228 return true; 5229 } 5230 if (entry->state & LE_WHITELIST_ADD_TO_CONTROLLER){ 5231 entry->state &= ~LE_WHITELIST_ADD_TO_CONTROLLER; 5232 entry->state |= LE_WHITELIST_ON_CONTROLLER; 5233 hci_send_cmd(&hci_le_add_device_to_white_list, entry->address_type, entry->address); 5234 return true; 5235 } 5236 if ((entry->state & LE_WHITELIST_ON_CONTROLLER) == 0){ 5237 btstack_linked_list_remove(&hci_stack->le_whitelist, (btstack_linked_item_t *) entry); 5238 btstack_memory_whitelist_entry_free(entry); 5239 } 5240 } 5241 } 5242 5243 #ifdef ENABLE_LE_PRIVACY_ADDRESS_RESOLUTION 5244 // LE Resolving List Management 5245 if (resolving_list_supported) { 5246 uint16_t i; 5247 switch (hci_stack->le_resolving_list_state) { 5248 case LE_RESOLVING_LIST_SEND_ENABLE_ADDRESS_RESOLUTION: 5249 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_READ_SIZE; 5250 hci_send_cmd(&hci_le_set_address_resolution_enabled, 1); 5251 return true; 5252 case LE_RESOLVING_LIST_READ_SIZE: 5253 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_SEND_CLEAR; 5254 hci_send_cmd(&hci_le_read_resolving_list_size); 5255 return true; 5256 case LE_RESOLVING_LIST_SEND_CLEAR: 5257 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_REMOVE_ENTRIES; 5258 (void) memset(hci_stack->le_resolving_list_add_entries, 0xff, 5259 sizeof(hci_stack->le_resolving_list_add_entries)); 5260 (void) memset(hci_stack->le_resolving_list_remove_entries, 0, 5261 sizeof(hci_stack->le_resolving_list_remove_entries)); 5262 hci_send_cmd(&hci_le_clear_resolving_list); 5263 return true; 5264 case LE_RESOLVING_LIST_REMOVE_ENTRIES: 5265 for (i = 0; i < MAX_NUM_RESOLVING_LIST_ENTRIES && i < le_device_db_max_count(); i++) { 5266 uint8_t offset = i >> 3; 5267 uint8_t mask = 1 << (i & 7); 5268 if ((hci_stack->le_resolving_list_remove_entries[offset] & mask) == 0) continue; 5269 hci_stack->le_resolving_list_remove_entries[offset] &= ~mask; 5270 bd_addr_t peer_identity_addreses; 5271 int peer_identity_addr_type = (int) BD_ADDR_TYPE_UNKNOWN; 5272 sm_key_t peer_irk; 5273 le_device_db_info(i, &peer_identity_addr_type, peer_identity_addreses, peer_irk); 5274 if (peer_identity_addr_type == BD_ADDR_TYPE_UNKNOWN) continue; 5275 5276 #ifdef ENABLE_LE_WHITELIST_TOUCH_AFTER_RESOLVING_LIST_UPDATE 5277 // trigger whitelist entry 'update' (work around for controller bug) 5278 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 5279 while (btstack_linked_list_iterator_has_next(&lit)) { 5280 whitelist_entry_t *entry = (whitelist_entry_t *) btstack_linked_list_iterator_next(&lit); 5281 if (entry->address_type != peer_identity_addr_type) continue; 5282 if (memcmp(entry->address, peer_identity_addreses, 6) != 0) continue; 5283 log_info("trigger whitelist update %s", bd_addr_to_str(peer_identity_addreses)); 5284 entry->state |= LE_WHITELIST_REMOVE_FROM_CONTROLLER | LE_WHITELIST_ADD_TO_CONTROLLER; 5285 } 5286 #endif 5287 5288 hci_send_cmd(&hci_le_remove_device_from_resolving_list, peer_identity_addr_type, 5289 peer_identity_addreses); 5290 return true; 5291 } 5292 5293 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_ADD_ENTRIES; 5294 5295 /* fall through */ 5296 5297 case LE_RESOLVING_LIST_ADD_ENTRIES: 5298 for (i = 0; i < MAX_NUM_RESOLVING_LIST_ENTRIES && i < le_device_db_max_count(); i++) { 5299 uint8_t offset = i >> 3; 5300 uint8_t mask = 1 << (i & 7); 5301 if ((hci_stack->le_resolving_list_add_entries[offset] & mask) == 0) continue; 5302 hci_stack->le_resolving_list_add_entries[offset] &= ~mask; 5303 bd_addr_t peer_identity_addreses; 5304 int peer_identity_addr_type = (int) BD_ADDR_TYPE_UNKNOWN; 5305 sm_key_t peer_irk; 5306 le_device_db_info(i, &peer_identity_addr_type, peer_identity_addreses, peer_irk); 5307 if (peer_identity_addr_type == BD_ADDR_TYPE_UNKNOWN) continue; 5308 const uint8_t *local_irk = gap_get_persistent_irk(); 5309 // command uses format specifier 'P' that stores 16-byte value without flip 5310 uint8_t local_irk_flipped[16]; 5311 uint8_t peer_irk_flipped[16]; 5312 reverse_128(local_irk, local_irk_flipped); 5313 reverse_128(peer_irk, peer_irk_flipped); 5314 hci_send_cmd(&hci_le_add_device_to_resolving_list, peer_identity_addr_type, peer_identity_addreses, 5315 peer_irk_flipped, local_irk_flipped); 5316 return true; 5317 } 5318 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_DONE; 5319 break; 5320 5321 default: 5322 break; 5323 } 5324 } 5325 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_DONE; 5326 #endif 5327 5328 // post-pone all actions until stack is fully working 5329 if (hci_stack->state != HCI_STATE_WORKING) return false; 5330 5331 // advertisements, active scanning, and creating connections requires random address to be set if using private address 5332 if ( (hci_stack->le_own_addr_type != BD_ADDR_TYPE_LE_PUBLIC) && (hci_stack->le_random_address_set == 0u) ) return false; 5333 5334 // Phase 4: restore state 5335 5336 #ifdef ENABLE_LE_CENTRAL 5337 // re-start scanning 5338 if ((hci_stack->le_scanning_enabled && !hci_stack->le_scanning_active)){ 5339 hci_stack->le_scanning_active = true; 5340 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 5341 if (hci_extended_advertising_supported()){ 5342 hci_send_cmd(&hci_le_set_extended_scan_enable, 1, 0, 0, 0); 5343 } else 5344 #endif 5345 { 5346 hci_send_cmd(&hci_le_set_scan_enable, 1, 0); 5347 } 5348 return true; 5349 } 5350 #endif 5351 5352 #ifdef ENABLE_LE_CENTRAL 5353 // re-start connecting 5354 if ( (hci_stack->le_connecting_state == LE_CONNECTING_IDLE) && (hci_stack->le_connecting_request == LE_CONNECTING_WHITELIST)){ 5355 bd_addr_t null_addr; 5356 memset(null_addr, 0, 6); 5357 hci_stack->le_connection_own_addr_type = hci_stack->le_own_addr_type; 5358 hci_get_own_address_for_addr_type(hci_stack->le_connection_own_addr_type, hci_stack->le_connection_own_address); 5359 hci_send_cmd(&hci_le_create_connection, 5360 hci_stack->le_connection_scan_interval, // scan interval: 60 ms 5361 hci_stack->le_connection_scan_window, // scan interval: 30 ms 5362 1, // use whitelist 5363 0, // peer address type 5364 null_addr, // peer bd addr 5365 hci_stack->le_connection_own_addr_type, // our addr type: 5366 hci_stack->le_connection_interval_min, // conn interval min 5367 hci_stack->le_connection_interval_max, // conn interval max 5368 hci_stack->le_connection_latency, // conn latency 5369 hci_stack->le_supervision_timeout, // conn latency 5370 hci_stack->le_minimum_ce_length, // min ce length 5371 hci_stack->le_maximum_ce_length // max ce length 5372 ); 5373 return true; 5374 } 5375 #endif 5376 5377 #ifdef ENABLE_LE_PERIPHERAL 5378 // re-start advertising 5379 if (hci_stack->le_advertisements_enabled_for_current_roles && ((hci_stack->le_advertisements_state & LE_ADVERTISEMENT_STATE_ACTIVE) == 0)){ 5380 // check if advertisements should be enabled given 5381 hci_stack->le_advertisements_state |= LE_ADVERTISEMENT_STATE_ACTIVE; 5382 hci_get_own_address_for_addr_type(hci_stack->le_advertisements_own_addr_type, hci_stack->le_advertisements_own_address); 5383 5384 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 5385 if (hci_extended_advertising_supported()){ 5386 const uint8_t advertising_handles[] = { 0 }; 5387 const uint16_t durations[] = { 0 }; 5388 const uint16_t max_events[] = { 0 }; 5389 hci_send_cmd(&hci_le_set_extended_advertising_enable, 1, 1, advertising_handles, durations, max_events); 5390 } else 5391 #endif 5392 { 5393 hci_send_cmd(&hci_le_set_advertise_enable, 1); 5394 } 5395 return true; 5396 } 5397 5398 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 5399 if (hci_extended_advertising_supported()) { 5400 btstack_linked_list_iterator_t it; 5401 btstack_linked_list_iterator_init(&it, &hci_stack->le_advertising_sets); 5402 while (btstack_linked_list_iterator_has_next(&it)) { 5403 le_advertising_set_t *advertising_set = (le_advertising_set_t *) btstack_linked_list_iterator_next(&it); 5404 if (((advertising_set->state & LE_ADVERTISEMENT_STATE_ENABLED) != 0) && ((advertising_set->state & LE_ADVERTISEMENT_STATE_ACTIVE) == 0)){ 5405 advertising_set->state |= LE_ADVERTISEMENT_STATE_ACTIVE; 5406 const uint8_t advertising_handles[] = { advertising_set->advertising_handle }; 5407 const uint16_t durations[] = { advertising_set->enable_timeout }; 5408 const uint16_t max_events[] = { advertising_set->enable_max_scan_events }; 5409 hci_send_cmd(&hci_le_set_extended_advertising_enable, 1, 1, advertising_handles, durations, max_events); 5410 return true; 5411 } 5412 if (((advertising_set->state & LE_ADVERTISEMENT_STATE_PERIODIC_ENABLED) != 0) && ((advertising_set->state & LE_ADVERTISEMENT_STATE_PERIODIC_ACTIVE) == 0)){ 5413 advertising_set->state |= LE_ADVERTISEMENT_STATE_PERIODIC_ACTIVE; 5414 uint8_t enable = 1; 5415 if (advertising_set->periodic_include_adi){ 5416 enable |= 2; 5417 } 5418 hci_send_cmd(&hci_le_set_periodic_advertising_enable, enable, advertising_set->advertising_handle); 5419 return true; 5420 } 5421 } 5422 } 5423 #endif 5424 #endif 5425 5426 return false; 5427 } 5428 #endif 5429 5430 static bool hci_run_general_pending_commands(void){ 5431 btstack_linked_item_t * it; 5432 for (it = (btstack_linked_item_t *) hci_stack->connections; it != NULL; it = it->next){ 5433 hci_connection_t * connection = (hci_connection_t *) it; 5434 5435 switch(connection->state){ 5436 case SEND_CREATE_CONNECTION: 5437 switch(connection->address_type){ 5438 #ifdef ENABLE_CLASSIC 5439 case BD_ADDR_TYPE_ACL: 5440 log_info("sending hci_create_connection"); 5441 hci_send_cmd(&hci_create_connection, connection->address, hci_usable_acl_packet_types(), 0, 0, 0, hci_stack->allow_role_switch); 5442 break; 5443 #endif 5444 default: 5445 #ifdef ENABLE_BLE 5446 #ifdef ENABLE_LE_CENTRAL 5447 log_info("sending hci_le_create_connection"); 5448 hci_stack->le_connection_own_addr_type = hci_stack->le_own_addr_type; 5449 hci_get_own_address_for_addr_type(hci_stack->le_connection_own_addr_type, hci_stack->le_connection_own_address); 5450 hci_send_cmd(&hci_le_create_connection, 5451 hci_stack->le_connection_scan_interval, // conn scan interval 5452 hci_stack->le_connection_scan_window, // conn scan windows 5453 0, // don't use whitelist 5454 connection->address_type, // peer address type 5455 connection->address, // peer bd addr 5456 hci_stack->le_connection_own_addr_type, // our addr type: 5457 hci_stack->le_connection_interval_min, // conn interval min 5458 hci_stack->le_connection_interval_max, // conn interval max 5459 hci_stack->le_connection_latency, // conn latency 5460 hci_stack->le_supervision_timeout, // conn latency 5461 hci_stack->le_minimum_ce_length, // min ce length 5462 hci_stack->le_maximum_ce_length // max ce length 5463 ); 5464 connection->state = SENT_CREATE_CONNECTION; 5465 #endif 5466 #endif 5467 break; 5468 } 5469 return true; 5470 5471 #ifdef ENABLE_CLASSIC 5472 case RECEIVED_CONNECTION_REQUEST: 5473 connection->role = HCI_ROLE_SLAVE; 5474 if (connection->address_type == BD_ADDR_TYPE_ACL){ 5475 log_info("sending hci_accept_connection_request"); 5476 connection->state = ACCEPTED_CONNECTION_REQUEST; 5477 hci_send_cmd(&hci_accept_connection_request, connection->address, hci_stack->master_slave_policy); 5478 return true; 5479 } 5480 break; 5481 #endif 5482 5483 #ifdef ENABLE_BLE 5484 #ifdef ENABLE_LE_CENTRAL 5485 case SEND_CANCEL_CONNECTION: 5486 connection->state = SENT_CANCEL_CONNECTION; 5487 hci_send_cmd(&hci_le_create_connection_cancel); 5488 return true; 5489 #endif 5490 #endif 5491 case SEND_DISCONNECT: 5492 connection->state = SENT_DISCONNECT; 5493 hci_send_cmd(&hci_disconnect, connection->con_handle, ERROR_CODE_REMOTE_USER_TERMINATED_CONNECTION); 5494 return true; 5495 5496 default: 5497 break; 5498 } 5499 5500 // no further commands if connection is about to get shut down 5501 if (connection->state == SENT_DISCONNECT) continue; 5502 5503 #ifdef ENABLE_CLASSIC 5504 5505 // Handling link key request requires remote supported features 5506 if (((connection->authentication_flags & AUTH_FLAG_HANDLE_LINK_KEY_REQUEST) != 0)){ 5507 log_info("responding to link key request, have link key db: %u", hci_stack->link_key_db != NULL); 5508 connectionClearAuthenticationFlags(connection, AUTH_FLAG_HANDLE_LINK_KEY_REQUEST); 5509 5510 bool have_link_key = connection->link_key_type != INVALID_LINK_KEY; 5511 bool security_level_sufficient = have_link_key && (gap_security_level_for_link_key_type(connection->link_key_type) >= connection->requested_security_level); 5512 if (have_link_key && security_level_sufficient){ 5513 hci_send_cmd(&hci_link_key_request_reply, connection->address, &connection->link_key); 5514 } else { 5515 hci_send_cmd(&hci_link_key_request_negative_reply, connection->address); 5516 } 5517 return true; 5518 } 5519 5520 if (connection->authentication_flags & AUTH_FLAG_DENY_PIN_CODE_REQUEST){ 5521 log_info("denying to pin request"); 5522 connectionClearAuthenticationFlags(connection, AUTH_FLAG_DENY_PIN_CODE_REQUEST); 5523 hci_send_cmd(&hci_pin_code_request_negative_reply, connection->address); 5524 return true; 5525 } 5526 5527 // security assessment requires remote features 5528 if ((connection->authentication_flags & AUTH_FLAG_RECV_IO_CAPABILITIES_REQUEST) != 0){ 5529 connectionClearAuthenticationFlags(connection, AUTH_FLAG_RECV_IO_CAPABILITIES_REQUEST); 5530 hci_ssp_assess_security_on_io_cap_request(connection); 5531 // 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 5532 } 5533 5534 if (connection->authentication_flags & AUTH_FLAG_SEND_IO_CAPABILITIES_REPLY){ 5535 connectionClearAuthenticationFlags(connection, AUTH_FLAG_SEND_IO_CAPABILITIES_REPLY); 5536 // set authentication requirements: 5537 // - MITM = ssp_authentication_requirement (USER) | requested_security_level (dynamic) 5538 // - BONDING MODE: dedicated if requested, bondable otherwise. Drop bondable if not set for remote 5539 uint8_t authreq = hci_stack->ssp_authentication_requirement & 1; 5540 if (gap_mitm_protection_required_for_security_level(connection->requested_security_level)){ 5541 authreq |= 1; 5542 } 5543 bool bonding = hci_stack->bondable; 5544 if (connection->authentication_flags & AUTH_FLAG_RECV_IO_CAPABILITIES_RESPONSE){ 5545 // if we have received IO Cap Response, we're in responder role 5546 bool remote_bonding = connection->io_cap_response_auth_req >= SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_DEDICATED_BONDING; 5547 if (bonding && !remote_bonding){ 5548 log_info("Remote not bonding, dropping local flag"); 5549 bonding = false; 5550 } 5551 } 5552 if (bonding){ 5553 if (connection->bonding_flags & BONDING_DEDICATED){ 5554 authreq |= SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_DEDICATED_BONDING; 5555 } else { 5556 authreq |= SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_GENERAL_BONDING; 5557 } 5558 } 5559 uint8_t have_oob_data = 0; 5560 #ifdef ENABLE_CLASSIC_PAIRING_OOB 5561 if (connection->classic_oob_c_192 != NULL){ 5562 have_oob_data |= 1; 5563 } 5564 if (connection->classic_oob_c_256 != NULL){ 5565 have_oob_data |= 2; 5566 } 5567 #endif 5568 hci_send_cmd(&hci_io_capability_request_reply, &connection->address, hci_stack->ssp_io_capability, have_oob_data, authreq); 5569 return true; 5570 } 5571 5572 if (connection->authentication_flags & AUTH_FLAG_SEND_IO_CAPABILITIES_NEGATIVE_REPLY) { 5573 connectionClearAuthenticationFlags(connection, AUTH_FLAG_SEND_IO_CAPABILITIES_NEGATIVE_REPLY); 5574 hci_send_cmd(&hci_io_capability_request_negative_reply, &connection->address, ERROR_CODE_PAIRING_NOT_ALLOWED); 5575 return true; 5576 } 5577 5578 #ifdef ENABLE_CLASSIC_PAIRING_OOB 5579 if (connection->authentication_flags & AUTH_FLAG_SEND_REMOTE_OOB_DATA_REPLY){ 5580 connectionClearAuthenticationFlags(connection, AUTH_FLAG_SEND_REMOTE_OOB_DATA_REPLY); 5581 const uint8_t zero[16] = { 0 }; 5582 const uint8_t * r_192 = zero; 5583 const uint8_t * c_192 = zero; 5584 const uint8_t * r_256 = zero; 5585 const uint8_t * c_256 = zero; 5586 // verify P-256 OOB 5587 if ((connection->classic_oob_c_256 != NULL) && hci_command_supported(SUPPORTED_HCI_COMMAND_REMOTE_OOB_EXTENDED_DATA_REQUEST_REPLY)) { 5588 c_256 = connection->classic_oob_c_256; 5589 if (connection->classic_oob_r_256 != NULL) { 5590 r_256 = connection->classic_oob_r_256; 5591 } 5592 } 5593 // verify P-192 OOB 5594 if ((connection->classic_oob_c_192 != NULL)) { 5595 c_192 = connection->classic_oob_c_192; 5596 if (connection->classic_oob_r_192 != NULL) { 5597 r_192 = connection->classic_oob_r_192; 5598 } 5599 } 5600 5601 // assess security 5602 bool need_level_4 = hci_stack->gap_secure_connections_only_mode || (connection->requested_security_level == LEVEL_4); 5603 bool can_reach_level_4 = hci_remote_sc_enabled(connection) && (c_256 != NULL); 5604 if (need_level_4 && !can_reach_level_4){ 5605 log_info("Level 4 required, but not possible -> abort"); 5606 hci_pairing_complete(connection, ERROR_CODE_INSUFFICIENT_SECURITY); 5607 // send oob negative reply 5608 c_256 = NULL; 5609 c_192 = NULL; 5610 } 5611 5612 // Reply 5613 if (c_256 != zero) { 5614 hci_send_cmd(&hci_remote_oob_extended_data_request_reply, &connection->address, c_192, r_192, c_256, r_256); 5615 } else if (c_192 != zero){ 5616 hci_send_cmd(&hci_remote_oob_data_request_reply, &connection->address, c_192, r_192); 5617 } else { 5618 hci_stack->classic_oob_con_handle = connection->con_handle; 5619 hci_send_cmd(&hci_remote_oob_data_request_negative_reply, &connection->address); 5620 } 5621 return true; 5622 } 5623 #endif 5624 5625 if (connection->authentication_flags & AUTH_FLAG_SEND_USER_CONFIRM_REPLY){ 5626 connectionClearAuthenticationFlags(connection, AUTH_FLAG_SEND_USER_CONFIRM_REPLY); 5627 hci_send_cmd(&hci_user_confirmation_request_reply, &connection->address); 5628 return true; 5629 } 5630 5631 if (connection->authentication_flags & AUTH_FLAG_SEND_USER_CONFIRM_NEGATIVE_REPLY){ 5632 connectionClearAuthenticationFlags(connection, AUTH_FLAG_SEND_USER_CONFIRM_NEGATIVE_REPLY); 5633 hci_send_cmd(&hci_user_confirmation_request_negative_reply, &connection->address); 5634 return true; 5635 } 5636 5637 if (connection->authentication_flags & AUTH_FLAG_SEND_USER_PASSKEY_REPLY){ 5638 connectionClearAuthenticationFlags(connection, AUTH_FLAG_SEND_USER_PASSKEY_REPLY); 5639 hci_send_cmd(&hci_user_passkey_request_reply, &connection->address, 000000); 5640 return true; 5641 } 5642 5643 if (connection->bonding_flags & BONDING_DISCONNECT_DEDICATED_DONE){ 5644 connection->bonding_flags &= ~BONDING_DISCONNECT_DEDICATED_DONE; 5645 connection->bonding_flags |= BONDING_EMIT_COMPLETE_ON_DISCONNECT; 5646 connection->state = SENT_DISCONNECT; 5647 hci_send_cmd(&hci_disconnect, connection->con_handle, ERROR_CODE_REMOTE_USER_TERMINATED_CONNECTION); 5648 return true; 5649 } 5650 5651 if ((connection->bonding_flags & BONDING_SEND_AUTHENTICATE_REQUEST) && ((connection->bonding_flags & BONDING_RECEIVED_REMOTE_FEATURES) != 0)){ 5652 connection->bonding_flags &= ~BONDING_SEND_AUTHENTICATE_REQUEST; 5653 connection->bonding_flags |= BONDING_SENT_AUTHENTICATE_REQUEST; 5654 hci_send_cmd(&hci_authentication_requested, connection->con_handle); 5655 return true; 5656 } 5657 5658 if (connection->bonding_flags & BONDING_SEND_ENCRYPTION_REQUEST){ 5659 connection->bonding_flags &= ~BONDING_SEND_ENCRYPTION_REQUEST; 5660 hci_send_cmd(&hci_set_connection_encryption, connection->con_handle, 1); 5661 return true; 5662 } 5663 5664 if (connection->bonding_flags & BONDING_SEND_READ_ENCRYPTION_KEY_SIZE){ 5665 connection->bonding_flags &= ~BONDING_SEND_READ_ENCRYPTION_KEY_SIZE; 5666 hci_send_cmd(&hci_read_encryption_key_size, connection->con_handle, 1); 5667 return true; 5668 } 5669 5670 if (connection->bonding_flags & BONDING_REQUEST_REMOTE_FEATURES_PAGE_0){ 5671 connection->bonding_flags &= ~BONDING_REQUEST_REMOTE_FEATURES_PAGE_0; 5672 hci_send_cmd(&hci_read_remote_supported_features_command, connection->con_handle); 5673 return true; 5674 } 5675 5676 if (connection->bonding_flags & BONDING_REQUEST_REMOTE_FEATURES_PAGE_1){ 5677 connection->bonding_flags &= ~BONDING_REQUEST_REMOTE_FEATURES_PAGE_1; 5678 hci_send_cmd(&hci_read_remote_extended_features_command, connection->con_handle, 1); 5679 return true; 5680 } 5681 5682 if (connection->bonding_flags & BONDING_REQUEST_REMOTE_FEATURES_PAGE_2){ 5683 connection->bonding_flags &= ~BONDING_REQUEST_REMOTE_FEATURES_PAGE_2; 5684 hci_send_cmd(&hci_read_remote_extended_features_command, connection->con_handle, 2); 5685 return true; 5686 } 5687 #endif 5688 5689 if (connection->bonding_flags & BONDING_DISCONNECT_SECURITY_BLOCK){ 5690 connection->bonding_flags &= ~BONDING_DISCONNECT_SECURITY_BLOCK; 5691 #ifdef ENABLE_CLASSIC 5692 hci_pairing_complete(connection, ERROR_CODE_CONNECTION_REJECTED_DUE_TO_SECURITY_REASONS); 5693 #endif 5694 if (connection->state != SENT_DISCONNECT){ 5695 connection->state = SENT_DISCONNECT; 5696 hci_send_cmd(&hci_disconnect, connection->con_handle, ERROR_CODE_AUTHENTICATION_FAILURE); 5697 return true; 5698 } 5699 } 5700 5701 #ifdef ENABLE_CLASSIC 5702 uint16_t sniff_min_interval; 5703 switch (connection->sniff_min_interval){ 5704 case 0: 5705 break; 5706 case 0xffff: 5707 connection->sniff_min_interval = 0; 5708 hci_send_cmd(&hci_exit_sniff_mode, connection->con_handle); 5709 return true; 5710 default: 5711 sniff_min_interval = connection->sniff_min_interval; 5712 connection->sniff_min_interval = 0; 5713 hci_send_cmd(&hci_sniff_mode, connection->con_handle, connection->sniff_max_interval, sniff_min_interval, connection->sniff_attempt, connection->sniff_timeout); 5714 return true; 5715 } 5716 5717 if (connection->sniff_subrating_max_latency != 0xffff){ 5718 uint16_t max_latency = connection->sniff_subrating_max_latency; 5719 connection->sniff_subrating_max_latency = 0; 5720 hci_send_cmd(&hci_sniff_subrating, connection->con_handle, max_latency, connection->sniff_subrating_min_remote_timeout, connection->sniff_subrating_min_local_timeout); 5721 return true; 5722 } 5723 5724 if (connection->qos_service_type != HCI_SERVICE_TYPE_INVALID){ 5725 uint8_t service_type = (uint8_t) connection->qos_service_type; 5726 connection->qos_service_type = HCI_SERVICE_TYPE_INVALID; 5727 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); 5728 return true; 5729 } 5730 5731 if (connection->request_role != HCI_ROLE_INVALID){ 5732 hci_role_t role = connection->request_role; 5733 connection->request_role = HCI_ROLE_INVALID; 5734 hci_send_cmd(&hci_switch_role_command, connection->address, role); 5735 return true; 5736 } 5737 #endif 5738 5739 if (connection->gap_connection_tasks != 0){ 5740 #ifdef ENABLE_CLASSIC 5741 if ((connection->gap_connection_tasks & GAP_CONNECTION_TASK_WRITE_AUTOMATIC_FLUSH_TIMEOUT) != 0){ 5742 connection->gap_connection_tasks &= ~GAP_CONNECTION_TASK_WRITE_AUTOMATIC_FLUSH_TIMEOUT; 5743 hci_send_cmd(&hci_write_automatic_flush_timeout, connection->con_handle, hci_stack->automatic_flush_timeout); 5744 return true; 5745 } 5746 if (connection->gap_connection_tasks & GAP_CONNECTION_TASK_WRITE_SUPERVISION_TIMEOUT){ 5747 connection->gap_connection_tasks &= ~GAP_CONNECTION_TASK_WRITE_SUPERVISION_TIMEOUT; 5748 hci_send_cmd(&hci_write_link_supervision_timeout, connection->con_handle, hci_stack->link_supervision_timeout); 5749 return true; 5750 } 5751 #endif 5752 if (connection->gap_connection_tasks & GAP_CONNECTION_TASK_READ_RSSI){ 5753 connection->gap_connection_tasks &= ~GAP_CONNECTION_TASK_READ_RSSI; 5754 hci_send_cmd(&hci_read_rssi, connection->con_handle); 5755 return true; 5756 } 5757 } 5758 5759 #ifdef ENABLE_BLE 5760 switch (connection->le_con_parameter_update_state){ 5761 // response to L2CAP CON PARAMETER UPDATE REQUEST 5762 case CON_PARAMETER_UPDATE_CHANGE_HCI_CON_PARAMETERS: 5763 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NONE; 5764 hci_send_cmd(&hci_le_connection_update, connection->con_handle, connection->le_conn_interval_min, 5765 connection->le_conn_interval_max, connection->le_conn_latency, connection->le_supervision_timeout, 5766 0x0000, 0xffff); 5767 return true; 5768 case CON_PARAMETER_UPDATE_REPLY: 5769 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NONE; 5770 hci_send_cmd(&hci_le_remote_connection_parameter_request_reply, connection->con_handle, connection->le_conn_interval_min, 5771 connection->le_conn_interval_max, connection->le_conn_latency, connection->le_supervision_timeout, 5772 0x0000, 0xffff); 5773 return true; 5774 case CON_PARAMETER_UPDATE_NEGATIVE_REPLY: 5775 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NONE; 5776 hci_send_cmd(&hci_le_remote_connection_parameter_request_negative_reply, ERROR_CODE_UNSUPPORTED_LMP_PARAMETER_VALUE_UNSUPPORTED_LL_PARAMETER_VALUE); 5777 return true; 5778 default: 5779 break; 5780 } 5781 if (connection->le_phy_update_all_phys != 0xffu){ 5782 uint8_t all_phys = connection->le_phy_update_all_phys; 5783 connection->le_phy_update_all_phys = 0xff; 5784 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); 5785 return true; 5786 } 5787 #endif 5788 } 5789 return false; 5790 } 5791 5792 static void hci_run(void){ 5793 5794 // stack state sub statemachines 5795 // halting needs to be called even if we cannot send command packet now 5796 switch (hci_stack->state) { 5797 case HCI_STATE_INITIALIZING: 5798 hci_initializing_run(); 5799 break; 5800 case HCI_STATE_HALTING: 5801 hci_halting_run(); 5802 break; 5803 case HCI_STATE_FALLING_ASLEEP: 5804 hci_falling_asleep_run(); 5805 break; 5806 default: 5807 break; 5808 } 5809 5810 bool done; 5811 5812 // send continuation fragments first, as they block the prepared packet buffer 5813 done = hci_run_acl_fragments(); 5814 if (done) return; 5815 5816 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 5817 // send host num completed packets next as they don't require num_cmd_packets > 0 5818 if (!hci_can_send_comand_packet_transport()) return; 5819 if (hci_stack->host_completed_packets){ 5820 hci_host_num_completed_packets(); 5821 return; 5822 } 5823 #endif 5824 5825 if (!hci_can_send_command_packet_now()) return; 5826 5827 // global/non-connection oriented commands 5828 5829 5830 #ifdef ENABLE_CLASSIC 5831 // general gap classic 5832 done = hci_run_general_gap_classic(); 5833 if (done) return; 5834 #endif 5835 5836 #ifdef ENABLE_BLE 5837 // general gap le 5838 done = hci_run_general_gap_le(); 5839 if (done) return; 5840 #endif 5841 5842 // send pending HCI commands 5843 hci_run_general_pending_commands(); 5844 } 5845 5846 uint8_t hci_send_cmd_packet(uint8_t *packet, int size){ 5847 // house-keeping 5848 5849 #ifdef ENABLE_CLASSIC 5850 bd_addr_t addr; 5851 hci_connection_t * conn; 5852 #endif 5853 #ifdef ENABLE_LE_CENTRAL 5854 uint8_t initiator_filter_policy; 5855 #endif 5856 5857 uint16_t opcode = little_endian_read_16(packet, 0); 5858 switch (opcode) { 5859 case HCI_OPCODE_HCI_WRITE_LOOPBACK_MODE: 5860 hci_stack->loopback_mode = packet[3]; 5861 break; 5862 5863 #ifdef ENABLE_CLASSIC 5864 case HCI_OPCODE_HCI_CREATE_CONNECTION: 5865 reverse_bd_addr(&packet[3], addr); 5866 log_info("Create_connection to %s", bd_addr_to_str(addr)); 5867 5868 // CVE-2020-26555: reject outgoing connection to device with same BD ADDR 5869 if (memcmp(hci_stack->local_bd_addr, addr, 6) == 0) { 5870 hci_emit_connection_complete(addr, 0, ERROR_CODE_CONNECTION_REJECTED_DUE_TO_UNACCEPTABLE_BD_ADDR); 5871 return ERROR_CODE_CONNECTION_REJECTED_DUE_TO_UNACCEPTABLE_BD_ADDR; 5872 } 5873 5874 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 5875 if (!conn) { 5876 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 5877 if (!conn) { 5878 // notify client that alloc failed 5879 hci_emit_connection_complete(addr, 0, BTSTACK_MEMORY_ALLOC_FAILED); 5880 return BTSTACK_MEMORY_ALLOC_FAILED; // packet not sent to controller 5881 } 5882 conn->state = SEND_CREATE_CONNECTION; 5883 conn->role = HCI_ROLE_MASTER; 5884 } 5885 5886 conn->con_handle = HCI_CON_HANDLE_INVALID; 5887 conn->role = HCI_ROLE_INVALID; 5888 5889 log_info("conn state %u", conn->state); 5890 // TODO: L2CAP should not send create connection command, instead a (new) gap function should be used 5891 switch (conn->state) { 5892 // if connection active exists 5893 case OPEN: 5894 // and OPEN, emit connection complete command 5895 hci_emit_connection_complete(addr, conn->con_handle, ERROR_CODE_SUCCESS); 5896 // packet not sent to controller 5897 return ERROR_CODE_ACL_CONNECTION_ALREADY_EXISTS; 5898 case RECEIVED_DISCONNECTION_COMPLETE: 5899 // create connection triggered in disconnect complete event, let's do it now 5900 break; 5901 case SEND_CREATE_CONNECTION: 5902 #ifdef ENABLE_HCI_SERIALIZED_CONTROLLER_OPERATIONS 5903 if (hci_classic_operation_active()){ 5904 return ERROR_CODE_SUCCESS; 5905 } 5906 #endif 5907 // connection created by hci, e.g. dedicated bonding, but not executed yet, let's do it now 5908 break; 5909 default: 5910 // otherwise, just ignore as it is already in the open process 5911 // packet not sent to controller 5912 return ERROR_CODE_ACL_CONNECTION_ALREADY_EXISTS; 5913 } 5914 conn->state = SENT_CREATE_CONNECTION; 5915 5916 // track outgoing connection 5917 hci_stack->outgoing_addr_type = BD_ADDR_TYPE_ACL; 5918 (void) memcpy(hci_stack->outgoing_addr, addr, 6); 5919 break; 5920 5921 #if defined (ENABLE_SCO_OVER_HCI) || defined (HAVE_SCO_TRANSPORT) 5922 case HCI_OPCODE_HCI_SETUP_SYNCHRONOUS_CONNECTION: 5923 // setup_synchronous_connection? Voice setting at offset 22 5924 // TODO: compare to current setting if sco connection already active 5925 hci_stack->sco_voice_setting_active = little_endian_read_16(packet, 15); 5926 break; 5927 case HCI_OPCODE_HCI_ACCEPT_SYNCHRONOUS_CONNECTION: 5928 // accept_synchronous_connection? Voice setting at offset 18 5929 // TODO: compare to current setting if sco connection already active 5930 hci_stack->sco_voice_setting_active = little_endian_read_16(packet, 19); 5931 // track outgoing connection 5932 hci_stack->outgoing_addr_type = BD_ADDR_TYPE_SCO; 5933 reverse_bd_addr(&packet[3], hci_stack->outgoing_addr); 5934 break; 5935 #endif 5936 #endif 5937 5938 #ifdef ENABLE_BLE 5939 #ifdef ENABLE_LE_CENTRAL 5940 case HCI_OPCODE_HCI_LE_CREATE_CONNECTION: 5941 // white list used? 5942 initiator_filter_policy = packet[7]; 5943 switch (initiator_filter_policy) { 5944 case 0: 5945 // whitelist not used 5946 hci_stack->le_connecting_state = LE_CONNECTING_DIRECT; 5947 break; 5948 case 1: 5949 hci_stack->le_connecting_state = LE_CONNECTING_WHITELIST; 5950 break; 5951 default: 5952 log_error("Invalid initiator_filter_policy in LE Create Connection %u", initiator_filter_policy); 5953 break; 5954 } 5955 // track outgoing connection 5956 hci_stack->outgoing_addr_type = (bd_addr_type_t) packet[8]; // peer addres type 5957 reverse_bd_addr( &packet[9], hci_stack->outgoing_addr); // peer address 5958 break; 5959 case HCI_OPCODE_HCI_LE_CREATE_CONNECTION_CANCEL: 5960 hci_stack->le_connecting_state = LE_CONNECTING_CANCEL; 5961 break; 5962 #endif 5963 #endif 5964 default: 5965 break; 5966 } 5967 5968 hci_stack->num_cmd_packets--; 5969 5970 hci_dump_packet(HCI_COMMAND_DATA_PACKET, 0, packet, size); 5971 int err = hci_stack->hci_transport->send_packet(HCI_COMMAND_DATA_PACKET, packet, size); 5972 if (err != 0){ 5973 return ERROR_CODE_HARDWARE_FAILURE; 5974 } 5975 return ERROR_CODE_SUCCESS; 5976 } 5977 5978 // disconnect because of security block 5979 void hci_disconnect_security_block(hci_con_handle_t con_handle){ 5980 hci_connection_t * connection = hci_connection_for_handle(con_handle); 5981 if (!connection) return; 5982 connection->bonding_flags |= BONDING_DISCONNECT_SECURITY_BLOCK; 5983 } 5984 5985 5986 // Configure Secure Simple Pairing 5987 5988 #ifdef ENABLE_CLASSIC 5989 5990 // enable will enable SSP during init 5991 void gap_ssp_set_enable(int enable){ 5992 hci_stack->ssp_enable = enable; 5993 } 5994 5995 static int hci_local_ssp_activated(void){ 5996 return gap_ssp_supported() && hci_stack->ssp_enable; 5997 } 5998 5999 // if set, BTstack will respond to io capability request using authentication requirement 6000 void gap_ssp_set_io_capability(int io_capability){ 6001 hci_stack->ssp_io_capability = io_capability; 6002 } 6003 void gap_ssp_set_authentication_requirement(int authentication_requirement){ 6004 hci_stack->ssp_authentication_requirement = authentication_requirement; 6005 } 6006 6007 // if set, BTstack will confirm a numberic comparion and enter '000000' if requested 6008 void gap_ssp_set_auto_accept(int auto_accept){ 6009 hci_stack->ssp_auto_accept = auto_accept; 6010 } 6011 6012 void gap_secure_connections_enable(bool enable){ 6013 hci_stack->secure_connections_enable = enable; 6014 } 6015 6016 #endif 6017 6018 // va_list part of hci_send_cmd 6019 uint8_t hci_send_cmd_va_arg(const hci_cmd_t * cmd, va_list argptr){ 6020 if (!hci_can_send_command_packet_now()){ 6021 log_error("hci_send_cmd called but cannot send packet now"); 6022 return ERROR_CODE_COMMAND_DISALLOWED; 6023 } 6024 6025 // for HCI INITIALIZATION 6026 // log_info("hci_send_cmd: opcode %04x", cmd->opcode); 6027 hci_stack->last_cmd_opcode = cmd->opcode; 6028 6029 hci_reserve_packet_buffer(); 6030 uint8_t * packet = hci_stack->hci_packet_buffer; 6031 uint16_t size = hci_cmd_create_from_template(packet, cmd, argptr); 6032 uint8_t status = hci_send_cmd_packet(packet, size); 6033 6034 // release packet buffer on error or for synchronous transport implementations 6035 if ((status != ERROR_CODE_SUCCESS) || hci_transport_synchronous()){ 6036 hci_release_packet_buffer(); 6037 hci_emit_transport_packet_sent(); 6038 } 6039 6040 return status; 6041 } 6042 6043 /** 6044 * pre: numcmds >= 0 - it's allowed to send a command to the controller 6045 */ 6046 uint8_t hci_send_cmd(const hci_cmd_t * cmd, ...){ 6047 va_list argptr; 6048 va_start(argptr, cmd); 6049 uint8_t status = hci_send_cmd_va_arg(cmd, argptr); 6050 va_end(argptr); 6051 return status; 6052 } 6053 6054 // Create various non-HCI events. 6055 // TODO: generalize, use table similar to hci_create_command 6056 6057 static void hci_emit_event(uint8_t * event, uint16_t size, int dump){ 6058 // dump packet 6059 if (dump) { 6060 hci_dump_packet( HCI_EVENT_PACKET, 0, event, size); 6061 } 6062 6063 // dispatch to all event handlers 6064 btstack_linked_list_iterator_t it; 6065 btstack_linked_list_iterator_init(&it, &hci_stack->event_handlers); 6066 while (btstack_linked_list_iterator_has_next(&it)){ 6067 btstack_packet_callback_registration_t * entry = (btstack_packet_callback_registration_t*) btstack_linked_list_iterator_next(&it); 6068 entry->callback(HCI_EVENT_PACKET, 0, event, size); 6069 } 6070 } 6071 6072 static void hci_emit_acl_packet(uint8_t * packet, uint16_t size){ 6073 if (!hci_stack->acl_packet_handler) return; 6074 hci_stack->acl_packet_handler(HCI_ACL_DATA_PACKET, 0, packet, size); 6075 } 6076 6077 #ifdef ENABLE_CLASSIC 6078 static void hci_notify_if_sco_can_send_now(void){ 6079 // notify SCO sender if waiting 6080 if (!hci_stack->sco_waiting_for_can_send_now) return; 6081 if (hci_can_send_sco_packet_now()){ 6082 hci_stack->sco_waiting_for_can_send_now = 0; 6083 uint8_t event[2] = { HCI_EVENT_SCO_CAN_SEND_NOW, 0 }; 6084 hci_dump_packet(HCI_EVENT_PACKET, 1, event, sizeof(event)); 6085 hci_stack->sco_packet_handler(HCI_EVENT_PACKET, 0, event, sizeof(event)); 6086 } 6087 } 6088 6089 // parsing end emitting has been merged to reduce code size 6090 static void gap_inquiry_explode(uint8_t *packet, uint16_t size) { 6091 uint8_t event[28+GAP_INQUIRY_MAX_NAME_LEN]; 6092 6093 uint8_t * eir_data; 6094 ad_context_t context; 6095 const uint8_t * name; 6096 uint8_t name_len; 6097 6098 if (size < 3) return; 6099 6100 int event_type = hci_event_packet_get_type(packet); 6101 int num_reserved_fields = (event_type == HCI_EVENT_INQUIRY_RESULT) ? 2 : 1; // 2 for old event, 1 otherwise 6102 int num_responses = hci_event_inquiry_result_get_num_responses(packet); 6103 6104 switch (event_type){ 6105 case HCI_EVENT_INQUIRY_RESULT: 6106 case HCI_EVENT_INQUIRY_RESULT_WITH_RSSI: 6107 if (size != (3 + (num_responses * 14))) return; 6108 break; 6109 case HCI_EVENT_EXTENDED_INQUIRY_RESPONSE: 6110 if (size != 257) return; 6111 if (num_responses != 1) return; 6112 break; 6113 default: 6114 return; 6115 } 6116 6117 // event[1] is set at the end 6118 int i; 6119 for (i=0; i<num_responses;i++){ 6120 memset(event, 0, sizeof(event)); 6121 event[0] = GAP_EVENT_INQUIRY_RESULT; 6122 uint8_t event_size = 27; // if name is not set by EIR 6123 6124 (void)memcpy(&event[2], &packet[3 + (i * 6)], 6); // bd_addr 6125 event[8] = packet[3 + (num_responses*(6)) + (i*1)]; // page_scan_repetition_mode 6126 (void)memcpy(&event[9], 6127 &packet[3 + (num_responses * (6 + 1 + num_reserved_fields)) + (i * 3)], 6128 3); // class of device 6129 (void)memcpy(&event[12], 6130 &packet[3 + (num_responses * (6 + 1 + num_reserved_fields + 3)) + (i * 2)], 6131 2); // clock offset 6132 6133 switch (event_type){ 6134 case HCI_EVENT_INQUIRY_RESULT: 6135 // 14,15,16,17 = 0, size 18 6136 break; 6137 case HCI_EVENT_INQUIRY_RESULT_WITH_RSSI: 6138 event[14] = 1; 6139 event[15] = packet [3 + (num_responses*(6+1+num_reserved_fields+3+2)) + (i*1)]; // rssi 6140 // 16,17 = 0, size 18 6141 break; 6142 case HCI_EVENT_EXTENDED_INQUIRY_RESPONSE: 6143 event[14] = 1; 6144 event[15] = packet [3 + (num_responses*(6+1+num_reserved_fields+3+2)) + (i*1)]; // rssi 6145 // EIR packets only contain a single inquiry response 6146 eir_data = &packet[3 + (6+1+num_reserved_fields+3+2+1)]; 6147 name = NULL; 6148 // Iterate over EIR data 6149 for (ad_iterator_init(&context, EXTENDED_INQUIRY_RESPONSE_DATA_LEN, eir_data) ; ad_iterator_has_more(&context) ; ad_iterator_next(&context)){ 6150 uint8_t data_type = ad_iterator_get_data_type(&context); 6151 uint8_t data_size = ad_iterator_get_data_len(&context); 6152 const uint8_t * data = ad_iterator_get_data(&context); 6153 // Prefer Complete Local Name over Shortened Local Name 6154 switch (data_type){ 6155 case BLUETOOTH_DATA_TYPE_SHORTENED_LOCAL_NAME: 6156 if (name) continue; 6157 /* fall through */ 6158 case BLUETOOTH_DATA_TYPE_COMPLETE_LOCAL_NAME: 6159 name = data; 6160 name_len = data_size; 6161 break; 6162 case BLUETOOTH_DATA_TYPE_DEVICE_ID: 6163 if (data_size != 8) break; 6164 event[16] = 1; 6165 memcpy(&event[17], data, 8); 6166 break; 6167 default: 6168 break; 6169 } 6170 } 6171 if (name){ 6172 event[25] = 1; 6173 // truncate name if needed 6174 int len = btstack_min(name_len, GAP_INQUIRY_MAX_NAME_LEN); 6175 event[26] = len; 6176 (void)memcpy(&event[27], name, len); 6177 event_size += len; 6178 } 6179 break; 6180 default: 6181 return; 6182 } 6183 event[1] = event_size - 2; 6184 hci_emit_event(event, event_size, 1); 6185 } 6186 } 6187 #endif 6188 6189 void hci_emit_state(void){ 6190 log_info("BTSTACK_EVENT_STATE %u", hci_stack->state); 6191 uint8_t event[3]; 6192 event[0] = BTSTACK_EVENT_STATE; 6193 event[1] = sizeof(event) - 2u; 6194 event[2] = hci_stack->state; 6195 hci_emit_event(event, sizeof(event), 1); 6196 } 6197 6198 #ifdef ENABLE_CLASSIC 6199 static void hci_emit_connection_complete(bd_addr_t address, hci_con_handle_t con_handle, uint8_t status){ 6200 uint8_t event[13]; 6201 event[0] = HCI_EVENT_CONNECTION_COMPLETE; 6202 event[1] = sizeof(event) - 2; 6203 event[2] = status; 6204 little_endian_store_16(event, 3, con_handle); 6205 reverse_bd_addr(address, &event[5]); 6206 event[11] = 1; // ACL connection 6207 event[12] = 0; // encryption disabled 6208 hci_emit_event(event, sizeof(event), 1); 6209 } 6210 static void hci_emit_l2cap_check_timeout(hci_connection_t *conn){ 6211 if (disable_l2cap_timeouts) return; 6212 log_info("L2CAP_EVENT_TIMEOUT_CHECK"); 6213 uint8_t event[4]; 6214 event[0] = L2CAP_EVENT_TIMEOUT_CHECK; 6215 event[1] = sizeof(event) - 2; 6216 little_endian_store_16(event, 2, conn->con_handle); 6217 hci_emit_event(event, sizeof(event), 1); 6218 } 6219 #endif 6220 6221 #ifdef ENABLE_BLE 6222 #ifdef ENABLE_LE_CENTRAL 6223 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){ 6224 uint8_t event[21]; 6225 event[0] = HCI_EVENT_LE_META; 6226 event[1] = sizeof(event) - 2u; 6227 event[2] = HCI_SUBEVENT_LE_CONNECTION_COMPLETE; 6228 event[3] = status; 6229 little_endian_store_16(event, 4, con_handle); 6230 event[6] = 0; // TODO: role 6231 event[7] = address_type; 6232 reverse_bd_addr(address, &event[8]); 6233 little_endian_store_16(event, 14, 0); // interval 6234 little_endian_store_16(event, 16, 0); // latency 6235 little_endian_store_16(event, 18, 0); // supervision timeout 6236 event[20] = 0; // master clock accuracy 6237 hci_emit_event(event, sizeof(event), 1); 6238 } 6239 #endif 6240 #endif 6241 6242 static void hci_emit_transport_packet_sent(void){ 6243 // notify upper stack that it might be possible to send again 6244 uint8_t event[] = { HCI_EVENT_TRANSPORT_PACKET_SENT, 0}; 6245 hci_emit_event(&event[0], sizeof(event), 0); // don't dump 6246 } 6247 6248 static void hci_emit_disconnection_complete(hci_con_handle_t con_handle, uint8_t reason){ 6249 uint8_t event[6]; 6250 event[0] = HCI_EVENT_DISCONNECTION_COMPLETE; 6251 event[1] = sizeof(event) - 2u; 6252 event[2] = 0; // status = OK 6253 little_endian_store_16(event, 3, con_handle); 6254 event[5] = reason; 6255 hci_emit_event(event, sizeof(event), 1); 6256 } 6257 6258 static void hci_emit_nr_connections_changed(void){ 6259 log_info("BTSTACK_EVENT_NR_CONNECTIONS_CHANGED %u", nr_hci_connections()); 6260 uint8_t event[3]; 6261 event[0] = BTSTACK_EVENT_NR_CONNECTIONS_CHANGED; 6262 event[1] = sizeof(event) - 2u; 6263 event[2] = nr_hci_connections(); 6264 hci_emit_event(event, sizeof(event), 1); 6265 } 6266 6267 static void hci_emit_hci_open_failed(void){ 6268 log_info("BTSTACK_EVENT_POWERON_FAILED"); 6269 uint8_t event[2]; 6270 event[0] = BTSTACK_EVENT_POWERON_FAILED; 6271 event[1] = sizeof(event) - 2u; 6272 hci_emit_event(event, sizeof(event), 1); 6273 } 6274 6275 static void hci_emit_dedicated_bonding_result(bd_addr_t address, uint8_t status){ 6276 log_info("hci_emit_dedicated_bonding_result %u ", status); 6277 uint8_t event[9]; 6278 int pos = 0; 6279 event[pos++] = GAP_EVENT_DEDICATED_BONDING_COMPLETED; 6280 event[pos++] = sizeof(event) - 2u; 6281 event[pos++] = status; 6282 reverse_bd_addr(address, &event[pos]); 6283 hci_emit_event(event, sizeof(event), 1); 6284 } 6285 6286 6287 #ifdef ENABLE_CLASSIC 6288 6289 static void hci_emit_security_level(hci_con_handle_t con_handle, gap_security_level_t level){ 6290 log_info("hci_emit_security_level %u for handle %x", level, con_handle); 6291 uint8_t event[5]; 6292 int pos = 0; 6293 event[pos++] = GAP_EVENT_SECURITY_LEVEL; 6294 event[pos++] = sizeof(event) - 2; 6295 little_endian_store_16(event, 2, con_handle); 6296 pos += 2; 6297 event[pos++] = level; 6298 hci_emit_event(event, sizeof(event), 1); 6299 } 6300 6301 static gap_security_level_t gap_security_level_for_connection(hci_connection_t * connection){ 6302 if (!connection) return LEVEL_0; 6303 if ((connection->authentication_flags & AUTH_FLAG_CONNECTION_ENCRYPTED) == 0) return LEVEL_0; 6304 // BIAS: we only consider Authenticated if the connection is already encrypted, which requires that both sides have link key 6305 if ((connection->authentication_flags & AUTH_FLAG_CONNECTION_AUTHENTICATED) == 0) return LEVEL_0; 6306 if (connection->encryption_key_size < hci_stack->gap_required_encyrption_key_size) return LEVEL_0; 6307 gap_security_level_t security_level = gap_security_level_for_link_key_type(connection->link_key_type); 6308 // LEVEL 4 always requires 128 bit encrytion key size 6309 if ((security_level == LEVEL_4) && (connection->encryption_key_size < 16)){ 6310 security_level = LEVEL_3; 6311 } 6312 return security_level; 6313 } 6314 6315 static void hci_emit_discoverable_enabled(uint8_t enabled){ 6316 log_info("BTSTACK_EVENT_DISCOVERABLE_ENABLED %u", enabled); 6317 uint8_t event[3]; 6318 event[0] = BTSTACK_EVENT_DISCOVERABLE_ENABLED; 6319 event[1] = sizeof(event) - 2; 6320 event[2] = enabled; 6321 hci_emit_event(event, sizeof(event), 1); 6322 } 6323 6324 // query if remote side supports eSCO 6325 bool hci_remote_esco_supported(hci_con_handle_t con_handle){ 6326 hci_connection_t * connection = hci_connection_for_handle(con_handle); 6327 if (!connection) return false; 6328 return (connection->remote_supported_features[0] & 1) != 0; 6329 } 6330 6331 static bool hci_ssp_supported(hci_connection_t * connection){ 6332 const uint8_t mask = BONDING_REMOTE_SUPPORTS_SSP_CONTROLLER | BONDING_REMOTE_SUPPORTS_SSP_HOST; 6333 return (connection->bonding_flags & mask) == mask; 6334 } 6335 6336 // query if remote side supports SSP 6337 bool hci_remote_ssp_supported(hci_con_handle_t con_handle){ 6338 hci_connection_t * connection = hci_connection_for_handle(con_handle); 6339 if (!connection) return false; 6340 return hci_ssp_supported(connection) ? 1 : 0; 6341 } 6342 6343 bool gap_ssp_supported_on_both_sides(hci_con_handle_t handle){ 6344 return hci_local_ssp_activated() && hci_remote_ssp_supported(handle); 6345 } 6346 6347 /** 6348 * Check if remote supported features query has completed 6349 */ 6350 bool hci_remote_features_available(hci_con_handle_t handle){ 6351 hci_connection_t * connection = hci_connection_for_handle(handle); 6352 if (!connection) return false; 6353 return (connection->bonding_flags & BONDING_RECEIVED_REMOTE_FEATURES) != 0; 6354 } 6355 6356 /** 6357 * Trigger remote supported features query 6358 */ 6359 6360 static void hci_trigger_remote_features_for_connection(hci_connection_t * connection){ 6361 if ((connection->bonding_flags & (BONDING_REMOTE_FEATURES_QUERY_ACTIVE | BONDING_RECEIVED_REMOTE_FEATURES)) == 0){ 6362 connection->bonding_flags |= BONDING_REMOTE_FEATURES_QUERY_ACTIVE | BONDING_REQUEST_REMOTE_FEATURES_PAGE_0; 6363 } 6364 } 6365 6366 void hci_remote_features_query(hci_con_handle_t con_handle){ 6367 hci_connection_t * connection = hci_connection_for_handle(con_handle); 6368 if (!connection) return; 6369 hci_trigger_remote_features_for_connection(connection); 6370 hci_run(); 6371 } 6372 6373 // GAP API 6374 /** 6375 * @bbrief enable/disable bonding. default is enabled 6376 * @praram enabled 6377 */ 6378 void gap_set_bondable_mode(int enable){ 6379 hci_stack->bondable = enable ? 1 : 0; 6380 } 6381 /** 6382 * @brief Get bondable mode. 6383 * @return 1 if bondable 6384 */ 6385 int gap_get_bondable_mode(void){ 6386 return hci_stack->bondable; 6387 } 6388 6389 /** 6390 * @brief map link keys to security levels 6391 */ 6392 gap_security_level_t gap_security_level_for_link_key_type(link_key_type_t link_key_type){ 6393 switch (link_key_type){ 6394 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P256: 6395 return LEVEL_4; 6396 case COMBINATION_KEY: 6397 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P192: 6398 return LEVEL_3; 6399 default: 6400 return LEVEL_2; 6401 } 6402 } 6403 6404 /** 6405 * @brief map link keys to secure connection yes/no 6406 */ 6407 bool gap_secure_connection_for_link_key_type(link_key_type_t link_key_type){ 6408 switch (link_key_type){ 6409 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P256: 6410 case UNAUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P256: 6411 return true; 6412 default: 6413 return false; 6414 } 6415 } 6416 6417 /** 6418 * @brief map link keys to authenticated 6419 */ 6420 bool gap_authenticated_for_link_key_type(link_key_type_t link_key_type){ 6421 switch (link_key_type){ 6422 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P256: 6423 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P192: 6424 return true; 6425 default: 6426 return false; 6427 } 6428 } 6429 6430 bool gap_mitm_protection_required_for_security_level(gap_security_level_t level){ 6431 log_info("gap_mitm_protection_required_for_security_level %u", level); 6432 return level > LEVEL_2; 6433 } 6434 6435 /** 6436 * @brief get current security level 6437 */ 6438 gap_security_level_t gap_security_level(hci_con_handle_t con_handle){ 6439 hci_connection_t * connection = hci_connection_for_handle(con_handle); 6440 if (!connection) return LEVEL_0; 6441 return gap_security_level_for_connection(connection); 6442 } 6443 6444 /** 6445 * @brief request connection to device to 6446 * @result GAP_AUTHENTICATION_RESULT 6447 */ 6448 void gap_request_security_level(hci_con_handle_t con_handle, gap_security_level_t requested_level){ 6449 hci_connection_t * connection = hci_connection_for_handle(con_handle); 6450 if (!connection){ 6451 hci_emit_security_level(con_handle, LEVEL_0); 6452 return; 6453 } 6454 6455 btstack_assert(hci_is_le_connection(connection) == false); 6456 6457 // 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) 6458 // available on the BR/EDR physical transport require Security Mode 4, Level 4 " 6459 if (hci_stack->gap_secure_connections_only_mode && (requested_level != LEVEL_0)){ 6460 requested_level = LEVEL_4; 6461 } 6462 6463 gap_security_level_t current_level = gap_security_level(con_handle); 6464 log_info("gap_request_security_level requested level %u, planned level %u, current level %u", 6465 requested_level, connection->requested_security_level, current_level); 6466 6467 // authentication active if authentication request was sent or planned level > 0 6468 bool authentication_active = ((connection->bonding_flags & BONDING_SENT_AUTHENTICATE_REQUEST) != 0) || (connection->requested_security_level > LEVEL_0); 6469 if (authentication_active){ 6470 // authentication already active 6471 if (connection->requested_security_level < requested_level){ 6472 // increase requested level as new level is higher 6473 // TODO: handle re-authentication when done 6474 connection->requested_security_level = requested_level; 6475 } 6476 } else { 6477 // no request active, notify if security sufficient 6478 if (requested_level <= current_level){ 6479 hci_emit_security_level(con_handle, current_level); 6480 return; 6481 } 6482 6483 // store request 6484 connection->requested_security_level = requested_level; 6485 6486 // request remote features if not already active 6487 hci_remote_features_query(con_handle); 6488 6489 // start to authenticate connection 6490 connection->bonding_flags |= BONDING_SEND_AUTHENTICATE_REQUEST; 6491 hci_run(); 6492 } 6493 } 6494 6495 /** 6496 * @brief start dedicated bonding with device. disconnect after bonding 6497 * @param device 6498 * @param request MITM protection 6499 * @result GAP_DEDICATED_BONDING_COMPLETE 6500 */ 6501 int gap_dedicated_bonding(bd_addr_t device, int mitm_protection_required){ 6502 6503 // create connection state machine 6504 hci_connection_t * connection = create_connection_for_bd_addr_and_type(device, BD_ADDR_TYPE_ACL); 6505 6506 if (!connection){ 6507 return BTSTACK_MEMORY_ALLOC_FAILED; 6508 } 6509 6510 // delete linkn key 6511 gap_drop_link_key_for_bd_addr(device); 6512 6513 // configure LEVEL_2/3, dedicated bonding 6514 connection->state = SEND_CREATE_CONNECTION; 6515 connection->requested_security_level = mitm_protection_required ? LEVEL_3 : LEVEL_2; 6516 log_info("gap_dedicated_bonding, mitm %d -> level %u", mitm_protection_required, connection->requested_security_level); 6517 connection->bonding_flags = BONDING_DEDICATED; 6518 6519 // wait for GAP Security Result and send GAP Dedicated Bonding complete 6520 6521 // handle: connnection failure (connection complete != ok) 6522 // handle: authentication failure 6523 // handle: disconnect on done 6524 6525 hci_run(); 6526 6527 return 0; 6528 } 6529 6530 void gap_set_local_name(const char * local_name){ 6531 hci_stack->local_name = local_name; 6532 hci_stack->gap_tasks_classic |= GAP_TASK_SET_LOCAL_NAME; 6533 // also update EIR if not set by user 6534 if (hci_stack->eir_data == NULL){ 6535 hci_stack->gap_tasks_classic |= GAP_TASK_SET_EIR_DATA; 6536 } 6537 hci_run(); 6538 } 6539 #endif 6540 6541 6542 #ifdef ENABLE_BLE 6543 6544 #ifdef ENABLE_LE_CENTRAL 6545 void gap_start_scan(void){ 6546 hci_stack->le_scanning_enabled = true; 6547 hci_run(); 6548 } 6549 6550 void gap_stop_scan(void){ 6551 hci_stack->le_scanning_enabled = false; 6552 hci_run(); 6553 } 6554 6555 void gap_set_scan_params(uint8_t scan_type, uint16_t scan_interval, uint16_t scan_window, uint8_t scanning_filter_policy){ 6556 hci_stack->le_scan_type = scan_type; 6557 hci_stack->le_scan_filter_policy = scanning_filter_policy; 6558 hci_stack->le_scan_interval = scan_interval; 6559 hci_stack->le_scan_window = scan_window; 6560 hci_stack->le_scanning_param_update = true; 6561 hci_run(); 6562 } 6563 6564 void gap_set_scan_parameters(uint8_t scan_type, uint16_t scan_interval, uint16_t scan_window){ 6565 gap_set_scan_params(scan_type, scan_interval, scan_window, 0); 6566 } 6567 6568 uint8_t gap_connect(const bd_addr_t addr, bd_addr_type_t addr_type){ 6569 hci_connection_t * conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 6570 if (!conn){ 6571 // disallow if le connection is already outgoing 6572 if (hci_is_le_connection_type(addr_type) && hci_stack->le_connecting_request != LE_CONNECTING_IDLE){ 6573 log_error("le connection already active"); 6574 return ERROR_CODE_COMMAND_DISALLOWED; 6575 } 6576 6577 log_info("gap_connect: no connection exists yet, creating context"); 6578 conn = create_connection_for_bd_addr_and_type(addr, addr_type); 6579 if (!conn){ 6580 // notify client that alloc failed 6581 hci_emit_le_connection_complete(addr_type, addr, 0, BTSTACK_MEMORY_ALLOC_FAILED); 6582 log_info("gap_connect: failed to alloc hci_connection_t"); 6583 return GATT_CLIENT_NOT_CONNECTED; // don't sent packet to controller 6584 } 6585 6586 // set le connecting state 6587 if (hci_is_le_connection_type(addr_type)){ 6588 hci_stack->le_connecting_request = LE_CONNECTING_DIRECT; 6589 } 6590 6591 conn->state = SEND_CREATE_CONNECTION; 6592 log_info("gap_connect: send create connection next"); 6593 hci_run(); 6594 return ERROR_CODE_SUCCESS; 6595 } 6596 6597 if (!hci_is_le_connection(conn) || 6598 (conn->state == SEND_CREATE_CONNECTION) || 6599 (conn->state == SENT_CREATE_CONNECTION)) { 6600 hci_emit_le_connection_complete(conn->address_type, conn->address, 0, ERROR_CODE_COMMAND_DISALLOWED); 6601 log_error("gap_connect: classic connection or connect is already being created"); 6602 return GATT_CLIENT_IN_WRONG_STATE; 6603 } 6604 6605 // check if connection was just disconnected 6606 if (conn->state == RECEIVED_DISCONNECTION_COMPLETE){ 6607 log_info("gap_connect: send create connection (again)"); 6608 conn->state = SEND_CREATE_CONNECTION; 6609 hci_run(); 6610 return ERROR_CODE_SUCCESS; 6611 } 6612 6613 log_info("gap_connect: context exists with state %u", conn->state); 6614 hci_emit_le_connection_complete(conn->address_type, conn->address, conn->con_handle, ERROR_CODE_SUCCESS); 6615 hci_run(); 6616 return ERROR_CODE_SUCCESS; 6617 } 6618 6619 // @assumption: only a single outgoing LE Connection exists 6620 static hci_connection_t * gap_get_outgoing_connection(void){ 6621 btstack_linked_item_t *it; 6622 for (it = (btstack_linked_item_t *) hci_stack->connections; it != NULL; it = it->next){ 6623 hci_connection_t * conn = (hci_connection_t *) it; 6624 if (!hci_is_le_connection(conn)) continue; 6625 switch (conn->state){ 6626 case SEND_CREATE_CONNECTION: 6627 case SENT_CREATE_CONNECTION: 6628 case SENT_CANCEL_CONNECTION: 6629 return conn; 6630 default: 6631 break; 6632 }; 6633 } 6634 return NULL; 6635 } 6636 6637 uint8_t gap_connect_cancel(void){ 6638 hci_connection_t * conn = gap_get_outgoing_connection(); 6639 if (!conn) return 0; 6640 switch (conn->state){ 6641 case SEND_CREATE_CONNECTION: 6642 // skip sending create connection and emit event instead 6643 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 6644 hci_emit_le_connection_complete(conn->address_type, conn->address, 0, ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER); 6645 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 6646 btstack_memory_hci_connection_free( conn ); 6647 break; 6648 case SENT_CREATE_CONNECTION: 6649 // request to send cancel connection 6650 conn->state = SEND_CANCEL_CONNECTION; 6651 hci_run(); 6652 break; 6653 default: 6654 break; 6655 } 6656 return 0; 6657 } 6658 6659 /** 6660 * @brief Set connection parameters for outgoing connections 6661 * @param conn_scan_interval (unit: 0.625 msec), default: 60 ms 6662 * @param conn_scan_window (unit: 0.625 msec), default: 30 ms 6663 * @param conn_interval_min (unit: 1.25ms), default: 10 ms 6664 * @param conn_interval_max (unit: 1.25ms), default: 30 ms 6665 * @param conn_latency, default: 4 6666 * @param supervision_timeout (unit: 10ms), default: 720 ms 6667 * @param min_ce_length (unit: 0.625ms), default: 10 ms 6668 * @param max_ce_length (unit: 0.625ms), default: 30 ms 6669 */ 6670 6671 void gap_set_connection_parameters(uint16_t conn_scan_interval, uint16_t conn_scan_window, 6672 uint16_t conn_interval_min, uint16_t conn_interval_max, uint16_t conn_latency, 6673 uint16_t supervision_timeout, uint16_t min_ce_length, uint16_t max_ce_length){ 6674 hci_stack->le_connection_scan_interval = conn_scan_interval; 6675 hci_stack->le_connection_scan_window = conn_scan_window; 6676 hci_stack->le_connection_interval_min = conn_interval_min; 6677 hci_stack->le_connection_interval_max = conn_interval_max; 6678 hci_stack->le_connection_latency = conn_latency; 6679 hci_stack->le_supervision_timeout = supervision_timeout; 6680 hci_stack->le_minimum_ce_length = min_ce_length; 6681 hci_stack->le_maximum_ce_length = max_ce_length; 6682 } 6683 #endif 6684 6685 /** 6686 * @brief Updates the connection parameters for a given LE connection 6687 * @param handle 6688 * @param conn_interval_min (unit: 1.25ms) 6689 * @param conn_interval_max (unit: 1.25ms) 6690 * @param conn_latency 6691 * @param supervision_timeout (unit: 10ms) 6692 * @return 0 if ok 6693 */ 6694 int gap_update_connection_parameters(hci_con_handle_t con_handle, uint16_t conn_interval_min, 6695 uint16_t conn_interval_max, uint16_t conn_latency, uint16_t supervision_timeout){ 6696 hci_connection_t * connection = hci_connection_for_handle(con_handle); 6697 if (!connection) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 6698 connection->le_conn_interval_min = conn_interval_min; 6699 connection->le_conn_interval_max = conn_interval_max; 6700 connection->le_conn_latency = conn_latency; 6701 connection->le_supervision_timeout = supervision_timeout; 6702 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_CHANGE_HCI_CON_PARAMETERS; 6703 hci_run(); 6704 return 0; 6705 } 6706 6707 /** 6708 * @brief Request an update of the connection parameter for a given LE connection 6709 * @param handle 6710 * @param conn_interval_min (unit: 1.25ms) 6711 * @param conn_interval_max (unit: 1.25ms) 6712 * @param conn_latency 6713 * @param supervision_timeout (unit: 10ms) 6714 * @return 0 if ok 6715 */ 6716 int gap_request_connection_parameter_update(hci_con_handle_t con_handle, uint16_t conn_interval_min, 6717 uint16_t conn_interval_max, uint16_t conn_latency, uint16_t supervision_timeout){ 6718 hci_connection_t * connection = hci_connection_for_handle(con_handle); 6719 if (!connection) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 6720 connection->le_conn_interval_min = conn_interval_min; 6721 connection->le_conn_interval_max = conn_interval_max; 6722 connection->le_conn_latency = conn_latency; 6723 connection->le_supervision_timeout = supervision_timeout; 6724 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_SEND_REQUEST; 6725 uint8_t l2cap_trigger_run_event[2] = { L2CAP_EVENT_TRIGGER_RUN, 0}; 6726 hci_emit_event(l2cap_trigger_run_event, sizeof(l2cap_trigger_run_event), 0); 6727 return 0; 6728 } 6729 6730 #ifdef ENABLE_LE_PERIPHERAL 6731 6732 /** 6733 * @brief Set Advertisement Data 6734 * @param advertising_data_length 6735 * @param advertising_data (max 31 octets) 6736 * @note data is not copied, pointer has to stay valid 6737 */ 6738 void gap_advertisements_set_data(uint8_t advertising_data_length, uint8_t * advertising_data){ 6739 hci_stack->le_advertisements_data_len = advertising_data_length; 6740 hci_stack->le_advertisements_data = advertising_data; 6741 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_ADV_DATA; 6742 hci_run(); 6743 } 6744 6745 /** 6746 * @brief Set Scan Response Data 6747 * @param advertising_data_length 6748 * @param advertising_data (max 31 octets) 6749 * @note data is not copied, pointer has to stay valid 6750 */ 6751 void gap_scan_response_set_data(uint8_t scan_response_data_length, uint8_t * scan_response_data){ 6752 hci_stack->le_scan_response_data_len = scan_response_data_length; 6753 hci_stack->le_scan_response_data = scan_response_data; 6754 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA; 6755 hci_run(); 6756 } 6757 6758 /** 6759 * @brief Set Advertisement Parameters 6760 * @param adv_int_min 6761 * @param adv_int_max 6762 * @param adv_type 6763 * @param direct_address_type 6764 * @param direct_address 6765 * @param channel_map 6766 * @param filter_policy 6767 * 6768 * @note internal use. use gap_advertisements_set_params from gap_le.h instead. 6769 */ 6770 void hci_le_advertisements_set_params(uint16_t adv_int_min, uint16_t adv_int_max, uint8_t adv_type, 6771 uint8_t direct_address_typ, bd_addr_t direct_address, 6772 uint8_t channel_map, uint8_t filter_policy) { 6773 6774 hci_stack->le_advertisements_interval_min = adv_int_min; 6775 hci_stack->le_advertisements_interval_max = adv_int_max; 6776 hci_stack->le_advertisements_type = adv_type; 6777 hci_stack->le_advertisements_direct_address_type = direct_address_typ; 6778 hci_stack->le_advertisements_channel_map = channel_map; 6779 hci_stack->le_advertisements_filter_policy = filter_policy; 6780 (void)memcpy(hci_stack->le_advertisements_direct_address, direct_address, 6781 6); 6782 6783 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_PARAMS; 6784 hci_stack->le_advertisements_state |= LE_ADVERTISEMENT_STATE_PARAMS_SET; 6785 hci_run(); 6786 } 6787 6788 /** 6789 * @brief Enable/Disable Advertisements 6790 * @param enabled 6791 */ 6792 void gap_advertisements_enable(int enabled){ 6793 if (enabled == 0){ 6794 hci_stack->le_advertisements_state &= ~LE_ADVERTISEMENT_STATE_ENABLED; 6795 } else { 6796 hci_stack->le_advertisements_state |= LE_ADVERTISEMENT_STATE_ENABLED; 6797 } 6798 hci_update_advertisements_enabled_for_current_roles(); 6799 hci_run(); 6800 } 6801 6802 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 6803 static le_advertising_set_t * hci_advertising_set_for_handle(uint8_t advertising_handle){ 6804 btstack_linked_list_iterator_t it; 6805 btstack_linked_list_iterator_init(&it, &hci_stack->le_advertising_sets); 6806 while (btstack_linked_list_iterator_has_next(&it)){ 6807 le_advertising_set_t * item = (le_advertising_set_t *) btstack_linked_list_iterator_next(&it); 6808 if ( item->advertising_handle == advertising_handle ) { 6809 return item; 6810 } 6811 } 6812 return NULL; 6813 } 6814 6815 uint8_t gap_extended_advertising_setup(le_advertising_set_t * storage, const le_extended_advertising_parameters_t * advertising_parameters, uint8_t * out_advertising_handle){ 6816 // find free advertisement handle 6817 uint8_t advertisement_handle; 6818 for (advertisement_handle = 1; advertisement_handle <= LE_EXTENDED_ADVERTISING_MAX_HANDLE; advertisement_handle++){ 6819 if (hci_advertising_set_for_handle(advertisement_handle) == NULL) break; 6820 } 6821 if (advertisement_handle > LE_EXTENDED_ADVERTISING_MAX_HANDLE) return ERROR_CODE_MEMORY_CAPACITY_EXCEEDED; 6822 // clear 6823 memset(storage, 0, sizeof(le_advertising_set_t)); 6824 // copy params 6825 storage->advertising_handle = advertisement_handle; 6826 memcpy(&storage->extended_params, advertising_parameters, sizeof(le_extended_advertising_parameters_t)); 6827 // add to list 6828 bool add_ok = btstack_linked_list_add(&hci_stack->le_advertising_sets, (btstack_linked_item_t *) storage); 6829 if (!add_ok) return ERROR_CODE_ACL_CONNECTION_ALREADY_EXISTS; 6830 *out_advertising_handle = advertisement_handle; 6831 // set tasks and start 6832 storage->tasks = LE_ADVERTISEMENT_TASKS_SET_PARAMS; 6833 hci_run(); 6834 return ERROR_CODE_SUCCESS; 6835 } 6836 6837 uint8_t gap_extended_advertising_set_params(uint8_t advertising_handle, const le_extended_advertising_parameters_t * advertising_parameters){ 6838 le_advertising_set_t * advertising_set = hci_advertising_set_for_handle(advertising_handle); 6839 if (advertising_set == NULL) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 6840 memcpy(&advertising_set->extended_params, advertising_parameters, sizeof(le_extended_advertising_parameters_t)); 6841 // set tasks and start 6842 advertising_set->tasks |= LE_ADVERTISEMENT_TASKS_SET_PARAMS; 6843 hci_run(); 6844 return ERROR_CODE_SUCCESS; 6845 } 6846 6847 uint8_t gap_extended_advertising_get_params(uint8_t advertising_handle, le_extended_advertising_parameters_t * advertising_parameters){ 6848 le_advertising_set_t * advertising_set = hci_advertising_set_for_handle(advertising_handle); 6849 if (advertising_set == NULL) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 6850 memcpy(advertising_parameters, &advertising_set->extended_params, sizeof(le_extended_advertising_parameters_t)); 6851 return ERROR_CODE_SUCCESS; 6852 } 6853 6854 uint8_t gap_periodic_advertising_set_params(uint8_t advertising_handle, const le_periodic_advertising_parameters_t * advertising_parameters){ 6855 le_advertising_set_t * advertising_set = hci_advertising_set_for_handle(advertising_handle); 6856 if (advertising_set == NULL) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 6857 // periodic advertising requires neither connectable, scannable, legacy or anonymous 6858 if ((advertising_set->extended_params.advertising_event_properties & 0x1f) != 0) return ERROR_CODE_INVALID_HCI_COMMAND_PARAMETERS; 6859 memcpy(&advertising_set->periodic_params, advertising_parameters, sizeof(le_periodic_advertising_parameters_t)); 6860 // set tasks and start 6861 advertising_set->tasks |= LE_ADVERTISEMENT_TASKS_SET_PERIODIC_PARAMS; 6862 hci_run(); 6863 return ERROR_CODE_SUCCESS; 6864 } 6865 6866 uint8_t gap_periodic_advertising_get_params(uint8_t advertising_handle, le_periodic_advertising_parameters_t * advertising_parameters){ 6867 le_advertising_set_t * advertising_set = hci_advertising_set_for_handle(advertising_handle); 6868 if (advertising_set == NULL) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 6869 memcpy(advertising_parameters, &advertising_set->extended_params, sizeof(le_periodic_advertising_parameters_t)); 6870 return ERROR_CODE_SUCCESS; 6871 } 6872 6873 uint8_t gap_extended_advertising_set_random_address(uint8_t advertising_handle, bd_addr_t random_address){ 6874 le_advertising_set_t * advertising_set = hci_advertising_set_for_handle(advertising_handle); 6875 if (advertising_set == NULL) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 6876 memcpy(advertising_set->random_address, random_address, 6); 6877 // set tasks and start 6878 advertising_set->tasks |= LE_ADVERTISEMENT_TASKS_SET_ADDRESS; 6879 hci_run(); 6880 return ERROR_CODE_SUCCESS; 6881 } 6882 6883 uint8_t gap_extended_advertising_set_adv_data(uint8_t advertising_handle, uint16_t advertising_data_length, const uint8_t * advertising_data){ 6884 le_advertising_set_t * advertising_set = hci_advertising_set_for_handle(advertising_handle); 6885 if (advertising_set == NULL) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 6886 advertising_set->adv_data = advertising_data; 6887 advertising_set->adv_data_len = advertising_data_length; 6888 // set tasks and start 6889 advertising_set->tasks |= LE_ADVERTISEMENT_TASKS_SET_ADV_DATA; 6890 hci_run(); 6891 return ERROR_CODE_SUCCESS; 6892 } 6893 6894 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){ 6895 le_advertising_set_t * advertising_set = hci_advertising_set_for_handle(advertising_handle); 6896 if (advertising_set == NULL) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 6897 advertising_set->scan_data = scan_response_data; 6898 advertising_set->scan_data_len = scan_response_data_length; 6899 // set tasks and start 6900 advertising_set->tasks |= LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA; 6901 hci_run(); 6902 return ERROR_CODE_SUCCESS; 6903 } 6904 6905 uint8_t gap_periodic_advertising_set_data(uint8_t advertising_handle, uint16_t periodic_data_length, const uint8_t * periodic_data){ 6906 le_advertising_set_t * advertising_set = hci_advertising_set_for_handle(advertising_handle); 6907 if (advertising_set == NULL) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 6908 advertising_set->periodic_data = periodic_data; 6909 advertising_set->periodic_data_len = periodic_data_length; 6910 // set tasks and start 6911 advertising_set->tasks |= LE_ADVERTISEMENT_TASKS_SET_PERIODIC_DATA; 6912 hci_run(); 6913 return ERROR_CODE_SUCCESS; 6914 } 6915 6916 uint8_t gap_extended_advertising_start(uint8_t advertising_handle, uint16_t timeout, uint8_t num_extended_advertising_events){ 6917 le_advertising_set_t * advertising_set = hci_advertising_set_for_handle(advertising_handle); 6918 if (advertising_set == NULL) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 6919 advertising_set->enable_timeout = timeout; 6920 advertising_set->enable_max_scan_events = num_extended_advertising_events; 6921 // set tasks and start 6922 advertising_set->state |= LE_ADVERTISEMENT_STATE_ENABLED; 6923 hci_run(); 6924 return ERROR_CODE_SUCCESS; 6925 } 6926 6927 uint8_t gap_extended_advertising_stop(uint8_t advertising_handle){ 6928 le_advertising_set_t * advertising_set = hci_advertising_set_for_handle(advertising_handle); 6929 if (advertising_set == NULL) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 6930 // set tasks and start 6931 advertising_set->state &= ~LE_ADVERTISEMENT_STATE_ENABLED; 6932 hci_run(); 6933 return ERROR_CODE_SUCCESS; 6934 } 6935 6936 uint8_t gap_periodic_advertising_start(uint8_t advertising_handle, bool include_adi){ 6937 le_advertising_set_t * advertising_set = hci_advertising_set_for_handle(advertising_handle); 6938 if (advertising_set == NULL) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 6939 // set tasks and start 6940 advertising_set->periodic_include_adi = include_adi; 6941 advertising_set->state |= LE_ADVERTISEMENT_STATE_PERIODIC_ENABLED; 6942 hci_run(); 6943 return ERROR_CODE_SUCCESS; 6944 } 6945 6946 uint8_t gap_periodic_advertising_stop(uint8_t advertising_handle){ 6947 le_advertising_set_t * advertising_set = hci_advertising_set_for_handle(advertising_handle); 6948 if (advertising_set == NULL) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 6949 // set tasks and start 6950 advertising_set->state &= ~LE_ADVERTISEMENT_STATE_PERIODIC_ENABLED; 6951 hci_run(); 6952 return ERROR_CODE_SUCCESS; 6953 } 6954 6955 uint8_t gap_extended_advertising_remove(uint8_t advertising_handle){ 6956 le_advertising_set_t * advertising_set = hci_advertising_set_for_handle(advertising_handle); 6957 if (advertising_set == NULL) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 6958 // set tasks and start 6959 advertising_set->tasks |= LE_ADVERTISEMENT_TASKS_REMOVE_SET; 6960 hci_run(); 6961 return ERROR_CODE_SUCCESS; 6962 } 6963 #endif 6964 6965 #endif 6966 6967 void hci_le_set_own_address_type(uint8_t own_address_type){ 6968 log_info("hci_le_set_own_address_type: old %u, new %u", hci_stack->le_own_addr_type, own_address_type); 6969 if (own_address_type == hci_stack->le_own_addr_type) return; 6970 hci_stack->le_own_addr_type = own_address_type; 6971 6972 #ifdef ENABLE_LE_PERIPHERAL 6973 // update advertisement parameters, too 6974 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_PARAMS; 6975 hci_run(); 6976 #endif 6977 #ifdef ENABLE_LE_CENTRAL 6978 // note: we don't update scan parameters or modify ongoing connection attempts 6979 #endif 6980 } 6981 6982 void hci_le_random_address_set(const bd_addr_t random_address){ 6983 memcpy(hci_stack->le_random_address, random_address, 6); 6984 hci_stack->le_random_address_set = true; 6985 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_ADDRESS; 6986 hci_run(); 6987 } 6988 6989 #endif 6990 6991 uint8_t gap_disconnect(hci_con_handle_t handle){ 6992 hci_connection_t * conn = hci_connection_for_handle(handle); 6993 if (!conn){ 6994 hci_emit_disconnection_complete(handle, 0); 6995 return 0; 6996 } 6997 // ignore if already disconnected 6998 if (conn->state == RECEIVED_DISCONNECTION_COMPLETE){ 6999 return 0; 7000 } 7001 conn->state = SEND_DISCONNECT; 7002 hci_run(); 7003 return 0; 7004 } 7005 7006 int gap_read_rssi(hci_con_handle_t con_handle){ 7007 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 7008 if (hci_connection == NULL) return 0; 7009 hci_connection->gap_connection_tasks |= GAP_CONNECTION_TASK_READ_RSSI; 7010 hci_run(); 7011 return 1; 7012 } 7013 7014 /** 7015 * @brief Get connection type 7016 * @param con_handle 7017 * @result connection_type 7018 */ 7019 gap_connection_type_t gap_get_connection_type(hci_con_handle_t connection_handle){ 7020 hci_connection_t * conn = hci_connection_for_handle(connection_handle); 7021 if (!conn) return GAP_CONNECTION_INVALID; 7022 switch (conn->address_type){ 7023 case BD_ADDR_TYPE_LE_PUBLIC: 7024 case BD_ADDR_TYPE_LE_RANDOM: 7025 return GAP_CONNECTION_LE; 7026 case BD_ADDR_TYPE_SCO: 7027 return GAP_CONNECTION_SCO; 7028 case BD_ADDR_TYPE_ACL: 7029 return GAP_CONNECTION_ACL; 7030 default: 7031 return GAP_CONNECTION_INVALID; 7032 } 7033 } 7034 7035 hci_role_t gap_get_role(hci_con_handle_t connection_handle){ 7036 hci_connection_t * conn = hci_connection_for_handle(connection_handle); 7037 if (!conn) return HCI_ROLE_INVALID; 7038 return (hci_role_t) conn->role; 7039 } 7040 7041 7042 #ifdef ENABLE_CLASSIC 7043 uint8_t gap_request_role(const bd_addr_t addr, hci_role_t role){ 7044 hci_connection_t * conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 7045 if (!conn) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 7046 conn->request_role = role; 7047 hci_run(); 7048 return ERROR_CODE_SUCCESS; 7049 } 7050 #endif 7051 7052 #ifdef ENABLE_BLE 7053 7054 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){ 7055 hci_connection_t * conn = hci_connection_for_handle(con_handle); 7056 if (!conn) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 7057 7058 conn->le_phy_update_all_phys = all_phys; 7059 conn->le_phy_update_tx_phys = tx_phys; 7060 conn->le_phy_update_rx_phys = rx_phys; 7061 conn->le_phy_update_phy_options = phy_options; 7062 7063 hci_run(); 7064 7065 return 0; 7066 } 7067 7068 static uint8_t hci_whitelist_add(bd_addr_type_t address_type, const bd_addr_t address){ 7069 // check if already in list 7070 btstack_linked_list_iterator_t it; 7071 btstack_linked_list_iterator_init(&it, &hci_stack->le_whitelist); 7072 while (btstack_linked_list_iterator_has_next(&it)) { 7073 whitelist_entry_t *entry = (whitelist_entry_t *) btstack_linked_list_iterator_next(&it); 7074 if (entry->address_type != address_type) { 7075 continue; 7076 } 7077 if (memcmp(entry->address, address, 6) != 0) { 7078 continue; 7079 } 7080 // disallow if already scheduled to add 7081 if ((entry->state & LE_WHITELIST_ADD_TO_CONTROLLER) != 0){ 7082 return ERROR_CODE_COMMAND_DISALLOWED; 7083 } 7084 // still on controller, but scheduled to remove -> re-add 7085 entry->state |= LE_WHITELIST_ADD_TO_CONTROLLER; 7086 return ERROR_CODE_SUCCESS; 7087 } 7088 // alloc and add to list 7089 whitelist_entry_t * entry = btstack_memory_whitelist_entry_get(); 7090 if (!entry) return BTSTACK_MEMORY_ALLOC_FAILED; 7091 entry->address_type = address_type; 7092 (void)memcpy(entry->address, address, 6); 7093 entry->state = LE_WHITELIST_ADD_TO_CONTROLLER; 7094 btstack_linked_list_add(&hci_stack->le_whitelist, (btstack_linked_item_t*) entry); 7095 return ERROR_CODE_SUCCESS; 7096 } 7097 7098 static uint8_t hci_whitelist_remove(bd_addr_type_t address_type, const bd_addr_t address){ 7099 btstack_linked_list_iterator_t it; 7100 btstack_linked_list_iterator_init(&it, &hci_stack->le_whitelist); 7101 while (btstack_linked_list_iterator_has_next(&it)){ 7102 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&it); 7103 if (entry->address_type != address_type) { 7104 continue; 7105 } 7106 if (memcmp(entry->address, address, 6) != 0) { 7107 continue; 7108 } 7109 if (entry->state & LE_WHITELIST_ON_CONTROLLER){ 7110 // remove from controller if already present 7111 entry->state |= LE_WHITELIST_REMOVE_FROM_CONTROLLER; 7112 } else { 7113 // directly remove entry from whitelist 7114 btstack_linked_list_iterator_remove(&it); 7115 btstack_memory_whitelist_entry_free(entry); 7116 } 7117 return ERROR_CODE_SUCCESS; 7118 } 7119 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 7120 } 7121 7122 static void hci_whitelist_clear(void){ 7123 btstack_linked_list_iterator_t it; 7124 btstack_linked_list_iterator_init(&it, &hci_stack->le_whitelist); 7125 while (btstack_linked_list_iterator_has_next(&it)){ 7126 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&it); 7127 if (entry->state & LE_WHITELIST_ON_CONTROLLER){ 7128 // remove from controller if already present 7129 entry->state |= LE_WHITELIST_REMOVE_FROM_CONTROLLER; 7130 continue; 7131 } 7132 // directly remove entry from whitelist 7133 btstack_linked_list_iterator_remove(&it); 7134 btstack_memory_whitelist_entry_free(entry); 7135 } 7136 } 7137 7138 // free all entries unconditionally 7139 static void hci_whitelist_free(void){ 7140 btstack_linked_list_iterator_t lit; 7141 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 7142 while (btstack_linked_list_iterator_has_next(&lit)){ 7143 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&lit); 7144 btstack_linked_list_remove(&hci_stack->le_whitelist, (btstack_linked_item_t *) entry); 7145 btstack_memory_whitelist_entry_free(entry); 7146 } 7147 } 7148 7149 /** 7150 * @brief Clear Whitelist 7151 * @return 0 if ok 7152 */ 7153 uint8_t gap_whitelist_clear(void){ 7154 hci_whitelist_clear(); 7155 hci_run(); 7156 return ERROR_CODE_SUCCESS; 7157 } 7158 7159 /** 7160 * @brief Add Device to Whitelist 7161 * @param address_typ 7162 * @param address 7163 * @return 0 if ok 7164 */ 7165 uint8_t gap_whitelist_add(bd_addr_type_t address_type, const bd_addr_t address){ 7166 uint8_t status = hci_whitelist_add(address_type, address); 7167 if (status){ 7168 return status; 7169 } 7170 hci_run(); 7171 return ERROR_CODE_SUCCESS; 7172 } 7173 7174 /** 7175 * @brief Remove Device from Whitelist 7176 * @param address_typ 7177 * @param address 7178 * @return 0 if ok 7179 */ 7180 uint8_t gap_whitelist_remove(bd_addr_type_t address_type, const bd_addr_t address){ 7181 uint8_t status = hci_whitelist_remove(address_type, address); 7182 if (status){ 7183 return status; 7184 } 7185 hci_run(); 7186 return ERROR_CODE_SUCCESS; 7187 } 7188 7189 #ifdef ENABLE_LE_CENTRAL 7190 /** 7191 * @brief Connect with Whitelist 7192 * @note Explicit whitelist management and this connect with whitelist replace deprecated gap_auto_connection_* functions 7193 * @return - if ok 7194 */ 7195 uint8_t gap_connect_with_whitelist(void){ 7196 if (hci_stack->le_connecting_request != LE_CONNECTING_IDLE){ 7197 return ERROR_CODE_COMMAND_DISALLOWED; 7198 } 7199 hci_stack->le_connecting_request = LE_CONNECTING_WHITELIST; 7200 hci_run(); 7201 return ERROR_CODE_SUCCESS; 7202 } 7203 7204 /** 7205 * @brief Auto Connection Establishment - Start Connecting to device 7206 * @param address_typ 7207 * @param address 7208 * @return 0 if ok 7209 */ 7210 uint8_t gap_auto_connection_start(bd_addr_type_t address_type, const bd_addr_t address){ 7211 if (hci_stack->le_connecting_request == LE_CONNECTING_DIRECT){ 7212 return ERROR_CODE_COMMAND_DISALLOWED; 7213 } 7214 7215 uint8_t status = hci_whitelist_add(address_type, address); 7216 if (status == BTSTACK_MEMORY_ALLOC_FAILED) { 7217 return status; 7218 } 7219 7220 hci_stack->le_connecting_request = LE_CONNECTING_WHITELIST; 7221 7222 hci_run(); 7223 return ERROR_CODE_SUCCESS; 7224 } 7225 7226 /** 7227 * @brief Auto Connection Establishment - Stop Connecting to device 7228 * @param address_typ 7229 * @param address 7230 * @return 0 if ok 7231 */ 7232 uint8_t gap_auto_connection_stop(bd_addr_type_t address_type, const bd_addr_t address){ 7233 if (hci_stack->le_connecting_request == LE_CONNECTING_DIRECT){ 7234 return ERROR_CODE_COMMAND_DISALLOWED; 7235 } 7236 7237 hci_whitelist_remove(address_type, address); 7238 if (btstack_linked_list_empty(&hci_stack->le_whitelist)){ 7239 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 7240 } 7241 hci_run(); 7242 return 0; 7243 } 7244 7245 /** 7246 * @brief Auto Connection Establishment - Stop everything 7247 * @note Convenience function to stop all active auto connection attempts 7248 */ 7249 uint8_t gap_auto_connection_stop_all(void){ 7250 if (hci_stack->le_connecting_request == LE_CONNECTING_DIRECT) { 7251 return ERROR_CODE_COMMAND_DISALLOWED; 7252 } 7253 hci_whitelist_clear(); 7254 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 7255 hci_run(); 7256 return ERROR_CODE_SUCCESS; 7257 } 7258 7259 uint16_t gap_le_connection_interval(hci_con_handle_t con_handle){ 7260 hci_connection_t * conn = hci_connection_for_handle(con_handle); 7261 if (!conn) return 0; 7262 return conn->le_connection_interval; 7263 } 7264 #endif 7265 #endif 7266 7267 #ifdef ENABLE_CLASSIC 7268 /** 7269 * @brief Set Extended Inquiry Response data 7270 * @param eir_data size HCI_EXTENDED_INQUIRY_RESPONSE_DATA_LEN (240) bytes, is not copied make sure memory is accessible during stack startup 7271 * @note has to be done before stack starts up 7272 */ 7273 void gap_set_extended_inquiry_response(const uint8_t * data){ 7274 hci_stack->eir_data = data; 7275 hci_stack->gap_tasks_classic |= GAP_TASK_SET_EIR_DATA; 7276 hci_run(); 7277 } 7278 7279 /** 7280 * @brief Start GAP Classic Inquiry 7281 * @param duration in 1.28s units 7282 * @return 0 if ok 7283 * @events: GAP_EVENT_INQUIRY_RESULT, GAP_EVENT_INQUIRY_COMPLETE 7284 */ 7285 int gap_inquiry_start(uint8_t duration_in_1280ms_units){ 7286 if (hci_stack->state != HCI_STATE_WORKING) return ERROR_CODE_COMMAND_DISALLOWED; 7287 if (hci_stack->inquiry_state != GAP_INQUIRY_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 7288 if ((duration_in_1280ms_units < GAP_INQUIRY_DURATION_MIN) || (duration_in_1280ms_units > GAP_INQUIRY_DURATION_MAX)){ 7289 return ERROR_CODE_INVALID_HCI_COMMAND_PARAMETERS; 7290 } 7291 hci_stack->inquiry_state = duration_in_1280ms_units; 7292 hci_run(); 7293 return 0; 7294 } 7295 7296 /** 7297 * @brief Stop GAP Classic Inquiry 7298 * @return 0 if ok 7299 */ 7300 int gap_inquiry_stop(void){ 7301 if ((hci_stack->inquiry_state >= GAP_INQUIRY_DURATION_MIN) && (hci_stack->inquiry_state <= GAP_INQUIRY_DURATION_MAX)) { 7302 // emit inquiry complete event, before it even started 7303 uint8_t event[] = { GAP_EVENT_INQUIRY_COMPLETE, 1, 0}; 7304 hci_emit_event(event, sizeof(event), 1); 7305 return 0; 7306 } 7307 if (hci_stack->inquiry_state != GAP_INQUIRY_STATE_ACTIVE) return ERROR_CODE_COMMAND_DISALLOWED; 7308 hci_stack->inquiry_state = GAP_INQUIRY_STATE_W2_CANCEL; 7309 hci_run(); 7310 return 0; 7311 } 7312 7313 void gap_inquiry_set_lap(uint32_t lap){ 7314 hci_stack->inquiry_lap = lap; 7315 } 7316 7317 void gap_inquiry_set_scan_activity(uint16_t inquiry_scan_interval, uint16_t inquiry_scan_window){ 7318 hci_stack->inquiry_scan_interval = inquiry_scan_interval; 7319 hci_stack->inquiry_scan_window = inquiry_scan_window; 7320 hci_stack->gap_tasks_classic |= GAP_TASK_WRITE_INQUIRY_SCAN_ACTIVITY; 7321 hci_run(); 7322 } 7323 7324 7325 /** 7326 * @brief Remote Name Request 7327 * @param addr 7328 * @param page_scan_repetition_mode 7329 * @param clock_offset only used when bit 15 is set 7330 * @events: HCI_EVENT_REMOTE_NAME_REQUEST_COMPLETE 7331 */ 7332 int gap_remote_name_request(const bd_addr_t addr, uint8_t page_scan_repetition_mode, uint16_t clock_offset){ 7333 if (hci_stack->remote_name_state != GAP_REMOTE_NAME_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 7334 (void)memcpy(hci_stack->remote_name_addr, addr, 6); 7335 hci_stack->remote_name_page_scan_repetition_mode = page_scan_repetition_mode; 7336 hci_stack->remote_name_clock_offset = clock_offset; 7337 hci_stack->remote_name_state = GAP_REMOTE_NAME_STATE_W2_SEND; 7338 hci_run(); 7339 return 0; 7340 } 7341 7342 static int gap_pairing_set_state_and_run(const bd_addr_t addr, uint8_t state){ 7343 hci_stack->gap_pairing_state = state; 7344 (void)memcpy(hci_stack->gap_pairing_addr, addr, 6); 7345 hci_run(); 7346 return 0; 7347 } 7348 7349 /** 7350 * @brief Legacy Pairing Pin Code Response for binary data / non-strings 7351 * @param addr 7352 * @param pin_data 7353 * @param pin_len 7354 * @return 0 if ok 7355 */ 7356 int gap_pin_code_response_binary(const bd_addr_t addr, const uint8_t * pin_data, uint8_t pin_len){ 7357 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 7358 hci_stack->gap_pairing_input.gap_pairing_pin = pin_data; 7359 hci_stack->gap_pairing_pin_len = pin_len; 7360 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PIN); 7361 } 7362 7363 /** 7364 * @brief Legacy Pairing Pin Code Response 7365 * @param addr 7366 * @param pin 7367 * @return 0 if ok 7368 */ 7369 int gap_pin_code_response(const bd_addr_t addr, const char * pin){ 7370 return gap_pin_code_response_binary(addr, (const uint8_t*) pin, strlen(pin)); 7371 } 7372 7373 /** 7374 * @brief Abort Legacy Pairing 7375 * @param addr 7376 * @param pin 7377 * @return 0 if ok 7378 */ 7379 int gap_pin_code_negative(bd_addr_t addr){ 7380 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 7381 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PIN_NEGATIVE); 7382 } 7383 7384 /** 7385 * @brief SSP Passkey Response 7386 * @param addr 7387 * @param passkey 7388 * @return 0 if ok 7389 */ 7390 int gap_ssp_passkey_response(const bd_addr_t addr, uint32_t passkey){ 7391 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 7392 hci_stack->gap_pairing_input.gap_pairing_passkey = passkey; 7393 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PASSKEY); 7394 } 7395 7396 /** 7397 * @brief Abort SSP Passkey Entry/Pairing 7398 * @param addr 7399 * @param pin 7400 * @return 0 if ok 7401 */ 7402 int gap_ssp_passkey_negative(const bd_addr_t addr){ 7403 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 7404 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PASSKEY_NEGATIVE); 7405 } 7406 7407 /** 7408 * @brief Accept SSP Numeric Comparison 7409 * @param addr 7410 * @param passkey 7411 * @return 0 if ok 7412 */ 7413 int gap_ssp_confirmation_response(const bd_addr_t addr){ 7414 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 7415 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_CONFIRMATION); 7416 } 7417 7418 /** 7419 * @brief Abort SSP Numeric Comparison/Pairing 7420 * @param addr 7421 * @param pin 7422 * @return 0 if ok 7423 */ 7424 int gap_ssp_confirmation_negative(const bd_addr_t addr){ 7425 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 7426 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_CONFIRMATION_NEGATIVE); 7427 } 7428 7429 #if defined(ENABLE_EXPLICIT_IO_CAPABILITIES_REPLY) || defined(ENABLE_EXPLICIT_LINK_KEY_REPLY) 7430 static uint8_t gap_set_auth_flag_and_run(const bd_addr_t addr, hci_authentication_flags_t flag){ 7431 hci_connection_t * conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 7432 if (!conn) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 7433 connectionSetAuthenticationFlags(conn, flag); 7434 hci_run(); 7435 return ERROR_CODE_SUCCESS; 7436 } 7437 #endif 7438 7439 #ifdef ENABLE_EXPLICIT_IO_CAPABILITIES_REPLY 7440 uint8_t gap_ssp_io_capabilities_response(const bd_addr_t addr){ 7441 return gap_set_auth_flag_and_run(addr, AUTH_FLAG_SEND_IO_CAPABILITIES_REPLY); 7442 } 7443 7444 uint8_t gap_ssp_io_capabilities_negative(const bd_addr_t addr){ 7445 return gap_set_auth_flag_and_run(addr, AUTH_FLAG_SEND_IO_CAPABILITIES_NEGATIVE_REPLY); 7446 } 7447 #endif 7448 7449 #ifdef ENABLE_CLASSIC_PAIRING_OOB 7450 /** 7451 * @brief Report Remote OOB Data 7452 * @param bd_addr 7453 * @param c_192 Simple Pairing Hash C derived from P-192 public key 7454 * @param r_192 Simple Pairing Randomizer derived from P-192 public key 7455 * @param c_256 Simple Pairing Hash C derived from P-256 public key 7456 * @param r_256 Simple Pairing Randomizer derived from P-256 public key 7457 */ 7458 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){ 7459 hci_connection_t * connection = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 7460 if (connection == NULL) { 7461 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 7462 } 7463 connection->classic_oob_c_192 = c_192; 7464 connection->classic_oob_r_192 = r_192; 7465 7466 // ignore P-256 if not supported by us 7467 if (hci_stack->secure_connections_active){ 7468 connection->classic_oob_c_256 = c_256; 7469 connection->classic_oob_r_256 = r_256; 7470 } 7471 7472 return ERROR_CODE_SUCCESS; 7473 } 7474 /** 7475 * @brief Generate new OOB data 7476 * @note OOB data will be provided in GAP_EVENT_LOCAL_OOB_DATA and be used in future pairing procedures 7477 */ 7478 void gap_ssp_generate_oob_data(void){ 7479 hci_stack->classic_read_local_oob_data = true; 7480 hci_run(); 7481 } 7482 7483 #endif 7484 7485 #ifdef ENABLE_EXPLICIT_LINK_KEY_REPLY 7486 uint8_t gap_send_link_key_response(const bd_addr_t addr, link_key_t link_key, link_key_type_t type){ 7487 hci_connection_t * connection = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 7488 if (connection == NULL) { 7489 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 7490 } 7491 7492 memcpy(connection->link_key, link_key, sizeof(link_key_t)); 7493 connection->link_key_type = type; 7494 7495 return gap_set_auth_flag_and_run(addr, AUTH_FLAG_HANDLE_LINK_KEY_REQUEST); 7496 } 7497 7498 #endif // ENABLE_EXPLICIT_LINK_KEY_REPLY 7499 /** 7500 * @brief Set inquiry mode: standard, with RSSI, with RSSI + Extended Inquiry Results. Has to be called before power on. 7501 * @param inquiry_mode see bluetooth_defines.h 7502 */ 7503 void hci_set_inquiry_mode(inquiry_mode_t inquiry_mode){ 7504 hci_stack->inquiry_mode = inquiry_mode; 7505 } 7506 7507 /** 7508 * @brief Configure Voice Setting for use with SCO data in HSP/HFP 7509 */ 7510 void hci_set_sco_voice_setting(uint16_t voice_setting){ 7511 hci_stack->sco_voice_setting = voice_setting; 7512 } 7513 7514 /** 7515 * @brief Get SCO Voice Setting 7516 * @return current voice setting 7517 */ 7518 uint16_t hci_get_sco_voice_setting(void){ 7519 return hci_stack->sco_voice_setting; 7520 } 7521 7522 static int hci_have_usb_transport(void){ 7523 if (!hci_stack->hci_transport) return 0; 7524 const char * transport_name = hci_stack->hci_transport->name; 7525 if (!transport_name) return 0; 7526 return (transport_name[0] == 'H') && (transport_name[1] == '2'); 7527 } 7528 7529 /** @brief Get SCO packet length for current SCO Voice setting 7530 * @note Using SCO packets of the exact length is required for USB transfer 7531 * @return Length of SCO packets in bytes (not audio frames) 7532 */ 7533 uint16_t hci_get_sco_packet_length(void){ 7534 uint16_t sco_packet_length = 0; 7535 7536 #ifdef ENABLE_SCO_OVER_HCI 7537 // Transparent = mSBC => 1, CVSD with 16-bit samples requires twice as much bytes 7538 int multiplier = ((hci_stack->sco_voice_setting_active & 0x03) == 0x03) ? 1 : 2; 7539 7540 if (hci_have_usb_transport()){ 7541 // see Core Spec for H2 USB Transfer. 7542 // 3 byte SCO header + 24 bytes per connection 7543 int num_sco_connections = btstack_max(1, hci_number_sco_connections()); 7544 sco_packet_length = 3 + 24 * num_sco_connections * multiplier; 7545 } else { 7546 // 3 byte SCO header + SCO packet size over the air (60 bytes) 7547 sco_packet_length = 3 + 60 * multiplier; 7548 // assert that it still fits inside an SCO buffer 7549 if (sco_packet_length > hci_stack->sco_data_packet_length){ 7550 sco_packet_length = 3 + 60; 7551 } 7552 } 7553 #endif 7554 7555 #ifdef HAVE_SCO_TRANSPORT 7556 // Transparent = mSBC => 1, CVSD with 16-bit samples requires twice as much bytes 7557 int multiplier = ((hci_stack->sco_voice_setting_active & 0x03) == 0x03) ? 1 : 2; 7558 sco_packet_length = 3 + 60 * multiplier; 7559 #endif 7560 return sco_packet_length; 7561 } 7562 7563 /** 7564 * @brief Sets the master/slave policy 7565 * @param policy (0: attempt to become master, 1: let connecting device decide) 7566 */ 7567 void hci_set_master_slave_policy(uint8_t policy){ 7568 hci_stack->master_slave_policy = policy; 7569 } 7570 7571 #endif 7572 7573 HCI_STATE hci_get_state(void){ 7574 return hci_stack->state; 7575 } 7576 7577 #ifdef ENABLE_CLASSIC 7578 void gap_register_classic_connection_filter(int (*accept_callback)(bd_addr_t addr, hci_link_type_t link_type)){ 7579 hci_stack->gap_classic_accept_callback = accept_callback; 7580 } 7581 #endif 7582 7583 /** 7584 * @brief Set callback for Bluetooth Hardware Error 7585 */ 7586 void hci_set_hardware_error_callback(void (*fn)(uint8_t error)){ 7587 hci_stack->hardware_error_callback = fn; 7588 } 7589 7590 void hci_disconnect_all(void){ 7591 btstack_linked_list_iterator_t it; 7592 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 7593 while (btstack_linked_list_iterator_has_next(&it)){ 7594 hci_connection_t * con = (hci_connection_t*) btstack_linked_list_iterator_next(&it); 7595 if (con->state == SENT_DISCONNECT) continue; 7596 con->state = SEND_DISCONNECT; 7597 } 7598 hci_run(); 7599 } 7600 7601 uint16_t hci_get_manufacturer(void){ 7602 return hci_stack->manufacturer; 7603 } 7604 7605 #ifdef ENABLE_BLE 7606 static sm_connection_t * sm_get_connection_for_handle(hci_con_handle_t con_handle){ 7607 hci_connection_t * hci_con = hci_connection_for_handle(con_handle); 7608 if (!hci_con) return NULL; 7609 return &hci_con->sm_connection; 7610 } 7611 7612 // extracted from sm.c to allow enabling of l2cap le data channels without adding sm.c to the build 7613 // without sm.c default values from create_connection_for_bd_addr_and_type() resulg in non-encrypted, not-authenticated 7614 #endif 7615 7616 uint8_t gap_encryption_key_size(hci_con_handle_t con_handle){ 7617 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 7618 if (hci_connection == NULL) return 0; 7619 if (hci_is_le_connection(hci_connection)){ 7620 #ifdef ENABLE_BLE 7621 sm_connection_t * sm_conn = &hci_connection->sm_connection; 7622 if (sm_conn->sm_connection_encrypted) { 7623 return sm_conn->sm_actual_encryption_key_size; 7624 } 7625 #endif 7626 } else { 7627 #ifdef ENABLE_CLASSIC 7628 if ((hci_connection->authentication_flags & AUTH_FLAG_CONNECTION_ENCRYPTED)){ 7629 return hci_connection->encryption_key_size; 7630 } 7631 #endif 7632 } 7633 return 0; 7634 } 7635 7636 bool gap_authenticated(hci_con_handle_t con_handle){ 7637 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 7638 if (hci_connection == NULL) return false; 7639 7640 switch (hci_connection->address_type){ 7641 #ifdef ENABLE_BLE 7642 case BD_ADDR_TYPE_LE_PUBLIC: 7643 case BD_ADDR_TYPE_LE_RANDOM: 7644 if (hci_connection->sm_connection.sm_connection_encrypted == 0) return 0; // unencrypted connection cannot be authenticated 7645 return hci_connection->sm_connection.sm_connection_authenticated != 0; 7646 #endif 7647 #ifdef ENABLE_CLASSIC 7648 case BD_ADDR_TYPE_SCO: 7649 case BD_ADDR_TYPE_ACL: 7650 return gap_authenticated_for_link_key_type(hci_connection->link_key_type); 7651 #endif 7652 default: 7653 return false; 7654 } 7655 } 7656 7657 bool gap_secure_connection(hci_con_handle_t con_handle){ 7658 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 7659 if (hci_connection == NULL) return 0; 7660 7661 switch (hci_connection->address_type){ 7662 #ifdef ENABLE_BLE 7663 case BD_ADDR_TYPE_LE_PUBLIC: 7664 case BD_ADDR_TYPE_LE_RANDOM: 7665 if (hci_connection->sm_connection.sm_connection_encrypted == 0) return false; // unencrypted connection cannot be authenticated 7666 return hci_connection->sm_connection.sm_connection_sc != 0; 7667 #endif 7668 #ifdef ENABLE_CLASSIC 7669 case BD_ADDR_TYPE_SCO: 7670 case BD_ADDR_TYPE_ACL: 7671 return gap_secure_connection_for_link_key_type(hci_connection->link_key_type); 7672 #endif 7673 default: 7674 return false; 7675 } 7676 } 7677 7678 bool gap_bonded(hci_con_handle_t con_handle){ 7679 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 7680 if (hci_connection == NULL) return 0; 7681 7682 #ifdef ENABLE_CLASSIC 7683 link_key_t link_key; 7684 link_key_type_t link_key_type; 7685 #endif 7686 switch (hci_connection->address_type){ 7687 #ifdef ENABLE_BLE 7688 case BD_ADDR_TYPE_LE_PUBLIC: 7689 case BD_ADDR_TYPE_LE_RANDOM: 7690 return hci_connection->sm_connection.sm_le_db_index >= 0; 7691 #endif 7692 #ifdef ENABLE_CLASSIC 7693 case BD_ADDR_TYPE_SCO: 7694 case BD_ADDR_TYPE_ACL: 7695 return hci_stack->link_key_db && hci_stack->link_key_db->get_link_key(hci_connection->address, link_key, &link_key_type); 7696 #endif 7697 default: 7698 return false; 7699 } 7700 } 7701 7702 #ifdef ENABLE_BLE 7703 authorization_state_t gap_authorization_state(hci_con_handle_t con_handle){ 7704 sm_connection_t * sm_conn = sm_get_connection_for_handle(con_handle); 7705 if (!sm_conn) return AUTHORIZATION_UNKNOWN; // wrong connection 7706 if (!sm_conn->sm_connection_encrypted) return AUTHORIZATION_UNKNOWN; // unencrypted connection cannot be authorized 7707 if (!sm_conn->sm_connection_authenticated) return AUTHORIZATION_UNKNOWN; // unauthenticatd connection cannot be authorized 7708 return sm_conn->sm_connection_authorization_state; 7709 } 7710 #endif 7711 7712 #ifdef ENABLE_CLASSIC 7713 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){ 7714 hci_connection_t * conn = hci_connection_for_handle(con_handle); 7715 if (!conn) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 7716 conn->sniff_min_interval = sniff_min_interval; 7717 conn->sniff_max_interval = sniff_max_interval; 7718 conn->sniff_attempt = sniff_attempt; 7719 conn->sniff_timeout = sniff_timeout; 7720 hci_run(); 7721 return 0; 7722 } 7723 7724 /** 7725 * @brief Exit Sniff mode 7726 * @param con_handle 7727 @ @return 0 if ok 7728 */ 7729 uint8_t gap_sniff_mode_exit(hci_con_handle_t con_handle){ 7730 hci_connection_t * conn = hci_connection_for_handle(con_handle); 7731 if (!conn) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 7732 conn->sniff_min_interval = 0xffff; 7733 hci_run(); 7734 return 0; 7735 } 7736 7737 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){ 7738 hci_connection_t * conn = hci_connection_for_handle(con_handle); 7739 if (!conn) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 7740 conn->sniff_subrating_max_latency = max_latency; 7741 conn->sniff_subrating_min_remote_timeout = min_remote_timeout; 7742 conn->sniff_subrating_min_local_timeout = min_local_timeout; 7743 hci_run(); 7744 return ERROR_CODE_SUCCESS; 7745 } 7746 7747 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){ 7748 hci_connection_t * conn = hci_connection_for_handle(con_handle); 7749 if (!conn) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 7750 conn->qos_service_type = service_type; 7751 conn->qos_token_rate = token_rate; 7752 conn->qos_peak_bandwidth = peak_bandwidth; 7753 conn->qos_latency = latency; 7754 conn->qos_delay_variation = delay_variation; 7755 hci_run(); 7756 return ERROR_CODE_SUCCESS; 7757 } 7758 7759 void gap_set_page_scan_activity(uint16_t page_scan_interval, uint16_t page_scan_window){ 7760 hci_stack->new_page_scan_interval = page_scan_interval; 7761 hci_stack->new_page_scan_window = page_scan_window; 7762 hci_stack->gap_tasks_classic |= GAP_TASK_WRITE_PAGE_SCAN_ACTIVITY; 7763 hci_run(); 7764 } 7765 7766 void gap_set_page_scan_type(page_scan_type_t page_scan_type){ 7767 hci_stack->new_page_scan_type = (uint8_t) page_scan_type; 7768 hci_stack->gap_tasks_classic |= GAP_TASK_WRITE_PAGE_SCAN_TYPE; 7769 hci_run(); 7770 } 7771 7772 void gap_set_page_timeout(uint16_t page_timeout){ 7773 hci_stack->page_timeout = page_timeout; 7774 hci_stack->gap_tasks_classic |= GAP_TASK_WRITE_PAGE_TIMEOUT; 7775 hci_run(); 7776 } 7777 7778 #endif 7779 7780 void hci_halting_defer(void){ 7781 if (hci_stack->state != HCI_STATE_HALTING) return; 7782 switch (hci_stack->substate){ 7783 case HCI_HALTING_READY_FOR_CLOSE: 7784 hci_stack->substate = HCI_HALTING_DEFER_CLOSE; 7785 break; 7786 default: 7787 break; 7788 } 7789 } 7790 7791 #ifdef ENABLE_LE_PRIVACY_ADDRESS_RESOLUTION 7792 void hci_load_le_device_db_entry_into_resolving_list(uint16_t le_device_db_index){ 7793 if (le_device_db_index >= MAX_NUM_RESOLVING_LIST_ENTRIES) return; 7794 if (le_device_db_index >= le_device_db_max_count()) return; 7795 uint8_t offset = le_device_db_index >> 3; 7796 uint8_t mask = 1 << (le_device_db_index & 7); 7797 hci_stack->le_resolving_list_add_entries[offset] |= mask; 7798 if (hci_stack->le_resolving_list_state == LE_RESOLVING_LIST_DONE){ 7799 // note: go back to remove entries, otherwise, a remove + add will skip the add 7800 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_REMOVE_ENTRIES; 7801 } 7802 } 7803 7804 void hci_remove_le_device_db_entry_from_resolving_list(uint16_t le_device_db_index){ 7805 if (le_device_db_index >= MAX_NUM_RESOLVING_LIST_ENTRIES) return; 7806 if (le_device_db_index >= le_device_db_max_count()) return; 7807 uint8_t offset = le_device_db_index >> 3; 7808 uint8_t mask = 1 << (le_device_db_index & 7); 7809 hci_stack->le_resolving_list_remove_entries[offset] |= mask; 7810 if (hci_stack->le_resolving_list_state == LE_RESOLVING_LIST_DONE){ 7811 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_REMOVE_ENTRIES; 7812 } 7813 } 7814 7815 uint8_t gap_load_resolving_list_from_le_device_db(void){ 7816 if (hci_command_supported(SUPPORTED_HCI_COMMAND_LE_SET_ADDRESS_RESOLUTION_ENABLE) == false){ 7817 return ERROR_CODE_UNSUPPORTED_FEATURE_OR_PARAMETER_VALUE; 7818 } 7819 if (hci_stack->le_resolving_list_state != LE_RESOLVING_LIST_SEND_ENABLE_ADDRESS_RESOLUTION){ 7820 // restart le resolving list update 7821 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_READ_SIZE; 7822 } 7823 return ERROR_CODE_SUCCESS; 7824 } 7825 #endif 7826 7827 #ifdef FUZZING_BUILD_MODE_UNSAFE_FOR_PRODUCTION 7828 void hci_setup_test_connections_fuzz(void){ 7829 hci_connection_t * conn; 7830 7831 // default address: 66:55:44:33:00:01 7832 bd_addr_t addr = { 0x66, 0x55, 0x44, 0x33, 0x00, 0x00}; 7833 7834 // setup Controller info 7835 hci_stack->num_cmd_packets = 255; 7836 hci_stack->acl_packets_total_num = 255; 7837 7838 // setup incoming Classic ACL connection with con handle 0x0001, 66:55:44:33:22:01 7839 addr[5] = 0x01; 7840 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 7841 conn->con_handle = addr[5]; 7842 conn->role = HCI_ROLE_SLAVE; 7843 conn->state = RECEIVED_CONNECTION_REQUEST; 7844 conn->sm_connection.sm_role = HCI_ROLE_SLAVE; 7845 7846 // setup incoming Classic SCO connection with con handle 0x0002 7847 addr[5] = 0x02; 7848 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_SCO); 7849 conn->con_handle = addr[5]; 7850 conn->role = HCI_ROLE_SLAVE; 7851 conn->state = RECEIVED_CONNECTION_REQUEST; 7852 conn->sm_connection.sm_role = HCI_ROLE_SLAVE; 7853 7854 // setup ready Classic ACL connection with con handle 0x0003 7855 addr[5] = 0x03; 7856 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 7857 conn->con_handle = addr[5]; 7858 conn->role = HCI_ROLE_SLAVE; 7859 conn->state = OPEN; 7860 conn->sm_connection.sm_role = HCI_ROLE_SLAVE; 7861 7862 // setup ready Classic SCO connection with con handle 0x0004 7863 addr[5] = 0x04; 7864 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_SCO); 7865 conn->con_handle = addr[5]; 7866 conn->role = HCI_ROLE_SLAVE; 7867 conn->state = OPEN; 7868 conn->sm_connection.sm_role = HCI_ROLE_SLAVE; 7869 7870 // setup ready LE ACL connection with con handle 0x005 and public address 7871 addr[5] = 0x05; 7872 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_LE_PUBLIC); 7873 conn->con_handle = addr[5]; 7874 conn->role = HCI_ROLE_SLAVE; 7875 conn->state = OPEN; 7876 conn->sm_connection.sm_role = HCI_ROLE_SLAVE; 7877 conn->sm_connection.sm_connection_encrypted = 1; 7878 } 7879 7880 void hci_free_connections_fuzz(void){ 7881 btstack_linked_list_iterator_t it; 7882 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 7883 while (btstack_linked_list_iterator_has_next(&it)){ 7884 hci_connection_t * con = (hci_connection_t*) btstack_linked_list_iterator_next(&it); 7885 btstack_linked_list_iterator_remove(&it); 7886 btstack_memory_hci_connection_free(con); 7887 } 7888 } 7889 void hci_simulate_working_fuzz(void){ 7890 hci_stack->le_scanning_param_update = false; 7891 hci_init_done(); 7892 hci_stack->num_cmd_packets = 255; 7893 } 7894 #endif 7895