1 /* 2 * Copyright (C) 2014 BlueKitchen GmbH 3 * 4 * Redistribution and use in source and binary forms, with or without 5 * modification, are permitted provided that the following conditions 6 * are met: 7 * 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 3. Neither the name of the copyright holders nor the names of 14 * contributors may be used to endorse or promote products derived 15 * from this software without specific prior written permission. 16 * 4. Any redistribution, use, or modification is done solely for 17 * personal benefit and not for any commercial purpose or for 18 * monetary gain. 19 * 20 * THIS SOFTWARE IS PROVIDED BY BLUEKITCHEN GMBH AND CONTRIBUTORS 21 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 22 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS 23 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL BLUEKITCHEN 24 * GMBH OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, 25 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, 26 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS 27 * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED 28 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, 29 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF 30 * THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 31 * SUCH DAMAGE. 32 * 33 * Please inquire about commercial licensing options at 34 * [email protected] 35 * 36 */ 37 38 #define BTSTACK_FILE__ "hci.c" 39 40 /* 41 * hci.c 42 * 43 * Created by Matthias Ringwald on 4/29/09. 44 * 45 */ 46 47 #include "btstack_config.h" 48 49 50 #ifdef ENABLE_CLASSIC 51 #ifdef HAVE_EMBEDDED_TICK 52 #include "btstack_run_loop_embedded.h" 53 #endif 54 #endif 55 56 #ifdef ENABLE_BLE 57 #include "gap.h" 58 #include "ble/le_device_db.h" 59 #endif 60 61 #include <stdarg.h> 62 #include <string.h> 63 #include <inttypes.h> 64 65 #include "btstack_debug.h" 66 #include "btstack_event.h" 67 #include "btstack_linked_list.h" 68 #include "btstack_memory.h" 69 #include "bluetooth_company_id.h" 70 #include "bluetooth_data_types.h" 71 #include "gap.h" 72 #include "hci.h" 73 #include "hci_cmd.h" 74 #include "hci_dump.h" 75 #include "ad_parser.h" 76 77 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 78 #ifndef HCI_HOST_ACL_PACKET_NUM 79 #error "ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL requires to define HCI_HOST_ACL_PACKET_NUM" 80 #endif 81 #ifndef HCI_HOST_ACL_PACKET_LEN 82 #error "ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL requires to define HCI_HOST_ACL_PACKET_LEN" 83 #endif 84 #ifndef HCI_HOST_SCO_PACKET_NUM 85 #error "ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL requires to define HCI_HOST_SCO_PACKET_NUM" 86 #endif 87 #ifndef HCI_HOST_SCO_PACKET_LEN 88 #error "ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL requires to define HCI_HOST_SCO_PACKET_LEN" 89 #endif 90 #endif 91 92 #if defined(ENABLE_SCO_OVER_HCI) && defined(ENABLE_SCO_OVER_PCM) 93 #error "SCO data can either be routed over HCI or over PCM, but not over both. Please only enable ENABLE_SCO_OVER_HCI or ENABLE_SCO_OVER_PCM." 94 #endif 95 96 #if defined(ENABLE_SCO_OVER_HCI) && defined(HAVE_SCO_TRANSPORT) 97 #error "SCO data can either be routed over HCI or over PCM, but not over both. Please only enable ENABLE_SCO_OVER_HCI or HAVE_SCO_TRANSPORT." 98 #endif 99 100 #define HCI_CONNECTION_TIMEOUT_MS 10000 101 102 #ifndef HCI_RESET_RESEND_TIMEOUT_MS 103 #define HCI_RESET_RESEND_TIMEOUT_MS 200 104 #endif 105 106 // Names are arbitrarily shortened to 32 bytes if not requested otherwise 107 #ifndef GAP_INQUIRY_MAX_NAME_LEN 108 #define GAP_INQUIRY_MAX_NAME_LEN 32 109 #endif 110 111 // GAP inquiry state: 0 = off, 0x01 - 0x30 = requested duration, 0xfe = active, 0xff = stop requested 112 #define GAP_INQUIRY_DURATION_MIN 0x01 113 #define GAP_INQUIRY_DURATION_MAX 0x30 114 #define GAP_INQUIRY_STATE_IDLE 0x00 115 #define GAP_INQUIRY_STATE_W4_ACTIVE 0x80 116 #define GAP_INQUIRY_STATE_ACTIVE 0x81 117 #define GAP_INQUIRY_STATE_W2_CANCEL 0x82 118 #define GAP_INQUIRY_STATE_W4_CANCELLED 0x83 119 120 // GAP Remote Name Request 121 #define GAP_REMOTE_NAME_STATE_IDLE 0 122 #define GAP_REMOTE_NAME_STATE_W2_SEND 1 123 #define GAP_REMOTE_NAME_STATE_W4_COMPLETE 2 124 125 // GAP Pairing 126 #define GAP_PAIRING_STATE_IDLE 0 127 #define GAP_PAIRING_STATE_SEND_PIN 1 128 #define GAP_PAIRING_STATE_SEND_PIN_NEGATIVE 2 129 #define GAP_PAIRING_STATE_SEND_PASSKEY 3 130 #define GAP_PAIRING_STATE_SEND_PASSKEY_NEGATIVE 4 131 #define GAP_PAIRING_STATE_SEND_CONFIRMATION 5 132 #define GAP_PAIRING_STATE_SEND_CONFIRMATION_NEGATIVE 6 133 #define GAP_PAIRING_STATE_WAIT_FOR_COMMAND_COMPLETE 7 134 135 // 136 // compact storage of relevant supported HCI Commands. 137 // X-Macro below provides enumeration and mapping table into the supported 138 // commands bitmap (64 bytes) from HCI Read Local Supported Commands 139 // 140 141 // format: command name, byte offset, bit nr in 64-byte supported commands 142 #define SUPPORTED_HCI_COMMANDS \ 143 X( SUPPORTED_HCI_COMMAND_READ_REMOTE_EXTENDED_FEATURES , 2, 5) \ 144 X( SUPPORTED_HCI_COMMAND_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE , 10, 4) \ 145 X( SUPPORTED_HCI_COMMAND_READ_BUFFER_SIZE , 14, 7) \ 146 X( SUPPORTED_HCI_COMMAND_WRITE_DEFAULT_ERRONEOUS_DATA_REPORTING, 18, 3) \ 147 X( SUPPORTED_HCI_COMMAND_READ_ENCRYPTION_KEY_SIZE , 20, 4) \ 148 X( SUPPORTED_HCI_COMMAND_WRITE_LE_HOST_SUPPORTED , 24, 6) \ 149 X( SUPPORTED_HCI_COMMAND_REMOTE_OOB_EXTENDED_DATA_REQUEST_REPLY, 32, 1) \ 150 X( SUPPORTED_HCI_COMMAND_WRITE_SECURE_CONNECTIONS_HOST , 32, 3) \ 151 X( SUPPORTED_HCI_COMMAND_READ_LOCAL_OOB_EXTENDED_DATA_COMMAND , 32, 6) \ 152 X( SUPPORTED_HCI_COMMAND_LE_WRITE_SUGGESTED_DEFAULT_DATA_LENGTH, 34, 0) \ 153 X( SUPPORTED_HCI_COMMAND_LE_READ_MAXIMUM_DATA_LENGTH , 35, 3) \ 154 X( SUPPORTED_HCI_COMMAND_LE_SET_ADDRESS_RESOLUTION_ENABLE , 35, 1) \ 155 X( SUPPORTED_HCI_COMMAND_LE_SET_DEFAULT_PHY , 35, 5) \ 156 X( SUPPORTED_HCI_COMMAND_LE_SET_EXTENDED_ADVERTISING_ENABLE , 36, 6) \ 157 158 // enumerate supported commands 159 #define X(name, offset, bit) name, 160 enum { 161 SUPPORTED_HCI_COMMANDS 162 SUPPORTED_HCI_COMMANDS_COUNT 163 }; 164 #undef X 165 166 // assert supported hci commands bitmap fits into provided storage 167 #if SUPPORTED_HCI_COMMANDS_COUNT > 16 168 #error "Storage for supported HCI commands too small" 169 #endif 170 171 // prototypes 172 #ifdef ENABLE_CLASSIC 173 static void hci_update_scan_enable(void); 174 static void hci_emit_discoverable_enabled(uint8_t enabled); 175 static int hci_local_ssp_activated(void); 176 static bool hci_remote_ssp_supported(hci_con_handle_t con_handle); 177 static bool hci_ssp_supported(hci_connection_t * connection); 178 static void hci_notify_if_sco_can_send_now(void); 179 static void hci_emit_connection_complete(bd_addr_t address, hci_con_handle_t con_handle, uint8_t status); 180 static gap_security_level_t gap_security_level_for_connection(hci_connection_t * connection); 181 static void hci_emit_security_level(hci_con_handle_t con_handle, gap_security_level_t level); 182 static void hci_connection_timeout_handler(btstack_timer_source_t *timer); 183 static void hci_connection_timestamp(hci_connection_t *connection); 184 static void hci_emit_l2cap_check_timeout(hci_connection_t *conn); 185 static void gap_inquiry_explode(uint8_t *packet, uint16_t size); 186 #endif 187 188 static int hci_power_control_on(void); 189 static void hci_power_control_off(void); 190 static void hci_state_reset(void); 191 static void hci_halting_timeout_handler(btstack_timer_source_t * ds); 192 static void hci_emit_transport_packet_sent(void); 193 static void hci_emit_disconnection_complete(hci_con_handle_t con_handle, uint8_t reason); 194 static void hci_emit_nr_connections_changed(void); 195 static void hci_emit_hci_open_failed(void); 196 static void hci_emit_dedicated_bonding_result(bd_addr_t address, uint8_t status); 197 static void hci_emit_event(uint8_t * event, uint16_t size, int dump); 198 static void hci_emit_acl_packet(uint8_t * packet, uint16_t size); 199 static void hci_run(void); 200 static int hci_is_le_connection(hci_connection_t * connection); 201 202 #ifdef ENABLE_CLASSIC 203 static int hci_have_usb_transport(void); 204 static void hci_trigger_remote_features_for_connection(hci_connection_t * connection); 205 #endif 206 207 #ifdef ENABLE_BLE 208 #ifdef ENABLE_LE_CENTRAL 209 // called from test/ble_client/advertising_data_parser.c 210 void le_handle_advertisement_report(uint8_t *packet, uint16_t size); 211 static uint8_t hci_whitelist_remove(bd_addr_type_t address_type, const bd_addr_t address); 212 static void hci_whitelist_free(void); 213 static hci_connection_t * gap_get_outgoing_connection(void); 214 static bool hci_run_general_gap_le(void); 215 #endif 216 #ifdef ENABLE_LE_PERIPHERAL 217 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 218 static le_advertising_set_t * hci_advertising_set_for_handle(uint8_t advertising_handle); 219 #endif /* ENABLE_LE_EXTENDED_ADVERTISING */ 220 #endif /* ENABLE_LE_PERIPHERAL */ 221 #endif /* ENABLE_BLE */ 222 223 // the STACK is here 224 #ifndef HAVE_MALLOC 225 static hci_stack_t hci_stack_static; 226 #endif 227 static hci_stack_t * hci_stack = NULL; 228 229 #ifdef ENABLE_CLASSIC 230 // default name 231 static const char * default_classic_name = "BTstack 00:00:00:00:00:00"; 232 233 // test helper 234 static uint8_t disable_l2cap_timeouts = 0; 235 #endif 236 237 // reset connection state on create and on reconnect 238 // don't overwrite addr, con handle, role 239 static void hci_connection_init(hci_connection_t * conn){ 240 conn->authentication_flags = AUTH_FLAG_NONE; 241 conn->bonding_flags = 0; 242 conn->requested_security_level = LEVEL_0; 243 #ifdef ENABLE_CLASSIC 244 conn->request_role = HCI_ROLE_INVALID; 245 conn->sniff_subrating_max_latency = 0xffff; 246 conn->qos_service_type = HCI_SERVICE_TYPE_INVALID; 247 conn->link_key_type = INVALID_LINK_KEY; 248 btstack_run_loop_set_timer_handler(&conn->timeout, hci_connection_timeout_handler); 249 btstack_run_loop_set_timer_context(&conn->timeout, conn); 250 hci_connection_timestamp(conn); 251 #endif 252 conn->acl_recombination_length = 0; 253 conn->acl_recombination_pos = 0; 254 conn->num_packets_sent = 0; 255 256 conn->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NONE; 257 #ifdef ENABLE_BLE 258 conn->le_phy_update_all_phys = 0xff; 259 #endif 260 #ifdef ENABLE_LE_LIMIT_ACL_FRAGMENT_BY_MAX_OCTETS 261 conn->le_max_tx_octets = 27; 262 #endif 263 #ifdef ENABLE_CLASSIC_PAIRING_OOB 264 conn->classic_oob_c_192 = NULL; 265 conn->classic_oob_r_192 = NULL; 266 conn->classic_oob_c_256 = NULL; 267 conn->classic_oob_r_256 = NULL; 268 #endif 269 } 270 271 /** 272 * create connection for given address 273 * 274 * @return connection OR NULL, if no memory left 275 */ 276 static hci_connection_t * create_connection_for_bd_addr_and_type(const bd_addr_t addr, bd_addr_type_t addr_type){ 277 log_info("create_connection_for_addr %s, type %x", bd_addr_to_str(addr), addr_type); 278 279 hci_connection_t * conn = btstack_memory_hci_connection_get(); 280 if (!conn) return NULL; 281 hci_connection_init(conn); 282 283 bd_addr_copy(conn->address, addr); 284 conn->address_type = addr_type; 285 conn->con_handle = HCI_CON_HANDLE_INVALID; 286 conn->role = HCI_ROLE_INVALID; 287 288 btstack_linked_list_add(&hci_stack->connections, (btstack_linked_item_t *) conn); 289 290 return conn; 291 } 292 293 294 /** 295 * get le connection parameter range 296 * 297 * @return le connection parameter range struct 298 */ 299 void gap_get_connection_parameter_range(le_connection_parameter_range_t * range){ 300 *range = hci_stack->le_connection_parameter_range; 301 } 302 303 /** 304 * set le connection parameter range 305 * 306 */ 307 308 void gap_set_connection_parameter_range(le_connection_parameter_range_t *range){ 309 hci_stack->le_connection_parameter_range = *range; 310 } 311 312 /** 313 * @brief Test if connection parameters are inside in existing rage 314 * @param conn_interval_min (unit: 1.25ms) 315 * @param conn_interval_max (unit: 1.25ms) 316 * @param conn_latency 317 * @param supervision_timeout (unit: 10ms) 318 * @return 1 if included 319 */ 320 int gap_connection_parameter_range_included(le_connection_parameter_range_t * existing_range, uint16_t le_conn_interval_min, uint16_t le_conn_interval_max, uint16_t le_conn_latency, uint16_t le_supervision_timeout){ 321 if (le_conn_interval_min < existing_range->le_conn_interval_min) return 0; 322 if (le_conn_interval_max > existing_range->le_conn_interval_max) return 0; 323 324 if (le_conn_latency < existing_range->le_conn_latency_min) return 0; 325 if (le_conn_latency > existing_range->le_conn_latency_max) return 0; 326 327 if (le_supervision_timeout < existing_range->le_supervision_timeout_min) return 0; 328 if (le_supervision_timeout > existing_range->le_supervision_timeout_max) return 0; 329 330 return 1; 331 } 332 333 /** 334 * @brief Set max number of connections in LE Peripheral role (if Bluetooth Controller supports it) 335 * @note: default: 1 336 * @param max_peripheral_connections 337 */ 338 #ifdef ENABLE_LE_PERIPHERAL 339 void gap_set_max_number_peripheral_connections(int max_peripheral_connections){ 340 hci_stack->le_max_number_peripheral_connections = max_peripheral_connections; 341 } 342 #endif 343 344 /** 345 * get hci connections iterator 346 * 347 * @return hci connections iterator 348 */ 349 350 void hci_connections_get_iterator(btstack_linked_list_iterator_t *it){ 351 btstack_linked_list_iterator_init(it, &hci_stack->connections); 352 } 353 354 /** 355 * get connection for a given handle 356 * 357 * @return connection OR NULL, if not found 358 */ 359 hci_connection_t * hci_connection_for_handle(hci_con_handle_t con_handle){ 360 btstack_linked_list_iterator_t it; 361 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 362 while (btstack_linked_list_iterator_has_next(&it)){ 363 hci_connection_t * item = (hci_connection_t *) btstack_linked_list_iterator_next(&it); 364 if ( item->con_handle == con_handle ) { 365 return item; 366 } 367 } 368 return NULL; 369 } 370 371 /** 372 * get connection for given address 373 * 374 * @return connection OR NULL, if not found 375 */ 376 hci_connection_t * hci_connection_for_bd_addr_and_type(const bd_addr_t addr, bd_addr_type_t addr_type){ 377 btstack_linked_list_iterator_t it; 378 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 379 while (btstack_linked_list_iterator_has_next(&it)){ 380 hci_connection_t * connection = (hci_connection_t *) btstack_linked_list_iterator_next(&it); 381 if (connection->address_type != addr_type) continue; 382 if (memcmp(addr, connection->address, 6) != 0) continue; 383 return connection; 384 } 385 return NULL; 386 } 387 388 inline static void connectionClearAuthenticationFlags(hci_connection_t * conn, hci_authentication_flags_t flags){ 389 conn->authentication_flags = (hci_authentication_flags_t)(conn->authentication_flags & ~flags); 390 } 391 392 inline static void connectionSetAuthenticationFlags(hci_connection_t * conn, hci_authentication_flags_t flags){ 393 conn->authentication_flags = (hci_authentication_flags_t)(conn->authentication_flags | flags); 394 } 395 396 #ifdef ENABLE_CLASSIC 397 398 #ifdef ENABLE_SCO_OVER_HCI 399 static int hci_number_sco_connections(void){ 400 int connections = 0; 401 btstack_linked_list_iterator_t it; 402 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 403 while (btstack_linked_list_iterator_has_next(&it)){ 404 hci_connection_t * connection = (hci_connection_t *) btstack_linked_list_iterator_next(&it); 405 if (connection->address_type != BD_ADDR_TYPE_SCO) continue; 406 connections++; 407 } 408 return connections; 409 } 410 #endif 411 412 static void hci_connection_timeout_handler(btstack_timer_source_t *timer){ 413 hci_connection_t * connection = (hci_connection_t *) btstack_run_loop_get_timer_context(timer); 414 #ifdef HAVE_EMBEDDED_TICK 415 if (btstack_run_loop_embedded_get_ticks() > connection->timestamp + btstack_run_loop_embedded_ticks_for_ms(HCI_CONNECTION_TIMEOUT_MS)){ 416 // connections might be timed out 417 hci_emit_l2cap_check_timeout(connection); 418 } 419 #else 420 if (btstack_run_loop_get_time_ms() > (connection->timestamp + HCI_CONNECTION_TIMEOUT_MS)){ 421 // connections might be timed out 422 hci_emit_l2cap_check_timeout(connection); 423 } 424 #endif 425 } 426 427 static void hci_connection_timestamp(hci_connection_t *connection){ 428 #ifdef HAVE_EMBEDDED_TICK 429 connection->timestamp = btstack_run_loop_embedded_get_ticks(); 430 #else 431 connection->timestamp = btstack_run_loop_get_time_ms(); 432 #endif 433 } 434 435 /** 436 * add authentication flags and reset timer 437 * @note: assumes classic connection 438 * @note: bd_addr is passed in as litle endian uint8_t * as it is called from parsing packets 439 */ 440 static void hci_add_connection_flags_for_flipped_bd_addr(uint8_t *bd_addr, hci_authentication_flags_t flags){ 441 bd_addr_t addr; 442 reverse_bd_addr(bd_addr, addr); 443 hci_connection_t * conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 444 if (conn) { 445 connectionSetAuthenticationFlags(conn, flags); 446 hci_connection_timestamp(conn); 447 } 448 } 449 450 static bool hci_pairing_active(hci_connection_t * hci_connection){ 451 return (hci_connection->authentication_flags & AUTH_FLAG_PAIRING_ACTIVE_MASK) != 0; 452 } 453 454 static void hci_pairing_started(hci_connection_t * hci_connection, bool ssp){ 455 if (hci_pairing_active(hci_connection)) return; 456 if (ssp){ 457 hci_connection->authentication_flags |= AUTH_FLAG_SSP_PAIRING_ACTIVE; 458 } else { 459 hci_connection->authentication_flags |= AUTH_FLAG_LEGACY_PAIRING_ACTIVE; 460 } 461 // if we are initiator, we have sent an HCI Authenticate Request 462 bool initiator = (hci_connection->bonding_flags & BONDING_SENT_AUTHENTICATE_REQUEST) != 0; 463 464 // if we are responder, use minimal service security level as required level 465 if (!initiator){ 466 hci_connection->requested_security_level = (gap_security_level_t) btstack_max((uint32_t) hci_connection->requested_security_level, (uint32_t) hci_stack->gap_minimal_service_security_level); 467 } 468 469 log_info("pairing started, ssp %u, initiator %u, requested level %u", (int) ssp, (int) initiator, hci_connection->requested_security_level); 470 471 uint8_t event[12]; 472 event[0] = GAP_EVENT_PAIRING_STARTED; 473 event[1] = 10; 474 little_endian_store_16(event, 2, (uint16_t) hci_connection->con_handle); 475 reverse_bd_addr(hci_connection->address, &event[4]); 476 event[10] = (uint8_t) ssp; 477 event[11] = (uint8_t) initiator; 478 hci_emit_event(event, sizeof(event), 1); 479 } 480 481 static void hci_pairing_complete(hci_connection_t * hci_connection, uint8_t status){ 482 hci_connection->requested_security_level = LEVEL_0; 483 if (!hci_pairing_active(hci_connection)) return; 484 hci_connection->authentication_flags &= ~AUTH_FLAG_PAIRING_ACTIVE_MASK; 485 #ifdef ENABLE_CLASSIC_PAIRING_OOB 486 hci_connection->classic_oob_c_192 = NULL; 487 hci_connection->classic_oob_r_192 = NULL; 488 hci_connection->classic_oob_c_256 = NULL; 489 hci_connection->classic_oob_r_256 = NULL; 490 #endif 491 log_info("pairing complete, status %02x", status); 492 493 uint8_t event[11]; 494 event[0] = GAP_EVENT_PAIRING_COMPLETE; 495 event[1] = 9; 496 little_endian_store_16(event, 2, (uint16_t) hci_connection->con_handle); 497 reverse_bd_addr(hci_connection->address, &event[4]); 498 event[10] = status; 499 hci_emit_event(event, sizeof(event), 1); 500 } 501 502 bool hci_authentication_active_for_handle(hci_con_handle_t handle){ 503 hci_connection_t * conn = hci_connection_for_handle(handle); 504 if (!conn) return false; 505 return hci_pairing_active(conn); 506 } 507 508 void gap_drop_link_key_for_bd_addr(bd_addr_t addr){ 509 if (!hci_stack->link_key_db) return; 510 log_info("gap_drop_link_key_for_bd_addr: %s", bd_addr_to_str(addr)); 511 hci_stack->link_key_db->delete_link_key(addr); 512 } 513 514 void gap_store_link_key_for_bd_addr(bd_addr_t addr, link_key_t link_key, link_key_type_t type){ 515 if (!hci_stack->link_key_db) return; 516 log_info("gap_store_link_key_for_bd_addr: %s, type %u", bd_addr_to_str(addr), type); 517 hci_stack->link_key_db->put_link_key(addr, link_key, type); 518 } 519 520 bool gap_get_link_key_for_bd_addr(bd_addr_t addr, link_key_t link_key, link_key_type_t * type){ 521 if (!hci_stack->link_key_db) return false; 522 int result = hci_stack->link_key_db->get_link_key(addr, link_key, type) != 0; 523 log_info("link key for %s available %u, type %u", bd_addr_to_str(addr), result, (int) *type); 524 return result; 525 } 526 527 void gap_delete_all_link_keys(void){ 528 bd_addr_t addr; 529 link_key_t link_key; 530 link_key_type_t type; 531 btstack_link_key_iterator_t it; 532 int ok = gap_link_key_iterator_init(&it); 533 if (!ok) { 534 log_error("could not initialize iterator"); 535 return; 536 } 537 while (gap_link_key_iterator_get_next(&it, addr, link_key, &type)){ 538 gap_drop_link_key_for_bd_addr(addr); 539 } 540 gap_link_key_iterator_done(&it); 541 } 542 543 int gap_link_key_iterator_init(btstack_link_key_iterator_t * it){ 544 if (!hci_stack->link_key_db) return 0; 545 if (!hci_stack->link_key_db->iterator_init) return 0; 546 return hci_stack->link_key_db->iterator_init(it); 547 } 548 int gap_link_key_iterator_get_next(btstack_link_key_iterator_t * it, bd_addr_t bd_addr, link_key_t link_key, link_key_type_t * type){ 549 if (!hci_stack->link_key_db) return 0; 550 return hci_stack->link_key_db->iterator_get_next(it, bd_addr, link_key, type); 551 } 552 void gap_link_key_iterator_done(btstack_link_key_iterator_t * it){ 553 if (!hci_stack->link_key_db) return; 554 hci_stack->link_key_db->iterator_done(it); 555 } 556 #endif 557 558 static bool hci_is_le_connection_type(bd_addr_type_t address_type){ 559 switch (address_type){ 560 case BD_ADDR_TYPE_LE_PUBLIC: 561 case BD_ADDR_TYPE_LE_RANDOM: 562 case BD_ADDR_TYPE_LE_PRIVAT_FALLBACK_PUBLIC: 563 case BD_ADDR_TYPE_LE_PRIVAT_FALLBACK_RANDOM: 564 return true; 565 default: 566 return false; 567 } 568 } 569 570 static int hci_is_le_connection(hci_connection_t * connection){ 571 return hci_is_le_connection_type(connection->address_type); 572 } 573 574 /** 575 * count connections 576 */ 577 static int nr_hci_connections(void){ 578 int count = 0; 579 btstack_linked_item_t *it; 580 for (it = (btstack_linked_item_t *) hci_stack->connections; it != NULL ; it = it->next){ 581 count++; 582 } 583 return count; 584 } 585 586 uint16_t hci_number_free_acl_slots_for_connection_type(bd_addr_type_t address_type){ 587 588 unsigned int num_packets_sent_classic = 0; 589 unsigned int num_packets_sent_le = 0; 590 591 btstack_linked_item_t *it; 592 for (it = (btstack_linked_item_t *) hci_stack->connections; it != NULL; it = it->next){ 593 hci_connection_t * connection = (hci_connection_t *) it; 594 if (hci_is_le_connection(connection)){ 595 num_packets_sent_le += connection->num_packets_sent; 596 } 597 if (connection->address_type == BD_ADDR_TYPE_ACL){ 598 num_packets_sent_classic += connection->num_packets_sent; 599 } 600 } 601 log_debug("ACL classic buffers: %u used of %u", num_packets_sent_classic, hci_stack->acl_packets_total_num); 602 int free_slots_classic = hci_stack->acl_packets_total_num - num_packets_sent_classic; 603 int free_slots_le = 0; 604 605 if (free_slots_classic < 0){ 606 log_error("hci_number_free_acl_slots: outgoing classic packets (%u) > total classic packets (%u)", num_packets_sent_classic, hci_stack->acl_packets_total_num); 607 return 0; 608 } 609 610 if (hci_stack->le_acl_packets_total_num){ 611 // if we have LE slots, they are used 612 free_slots_le = hci_stack->le_acl_packets_total_num - num_packets_sent_le; 613 if (free_slots_le < 0){ 614 log_error("hci_number_free_acl_slots: outgoing le packets (%u) > total le packets (%u)", num_packets_sent_le, hci_stack->le_acl_packets_total_num); 615 return 0; 616 } 617 } else { 618 // otherwise, classic slots are used for LE, too 619 free_slots_classic -= num_packets_sent_le; 620 if (free_slots_classic < 0){ 621 log_error("hci_number_free_acl_slots: outgoing classic + le packets (%u + %u) > total packets (%u)", num_packets_sent_classic, num_packets_sent_le, hci_stack->acl_packets_total_num); 622 return 0; 623 } 624 } 625 626 switch (address_type){ 627 case BD_ADDR_TYPE_UNKNOWN: 628 log_error("hci_number_free_acl_slots: unknown address type"); 629 return 0; 630 631 case BD_ADDR_TYPE_ACL: 632 return (uint16_t) free_slots_classic; 633 634 default: 635 if (hci_stack->le_acl_packets_total_num > 0){ 636 return (uint16_t) free_slots_le; 637 } 638 return (uint16_t) free_slots_classic; 639 } 640 } 641 642 int hci_number_free_acl_slots_for_handle(hci_con_handle_t con_handle){ 643 // get connection type 644 hci_connection_t * connection = hci_connection_for_handle(con_handle); 645 if (!connection){ 646 log_error("hci_number_free_acl_slots: handle 0x%04x not in connection list", con_handle); 647 return 0; 648 } 649 return hci_number_free_acl_slots_for_connection_type(connection->address_type); 650 } 651 652 #ifdef ENABLE_CLASSIC 653 static int hci_number_free_sco_slots(void){ 654 unsigned int num_sco_packets_sent = 0; 655 btstack_linked_item_t *it; 656 if (hci_stack->synchronous_flow_control_enabled){ 657 // explicit flow control 658 for (it = (btstack_linked_item_t *) hci_stack->connections; it ; it = it->next){ 659 hci_connection_t * connection = (hci_connection_t *) it; 660 if (connection->address_type != BD_ADDR_TYPE_SCO) continue; 661 num_sco_packets_sent += connection->num_packets_sent; 662 } 663 if (num_sco_packets_sent > hci_stack->sco_packets_total_num){ 664 log_info("hci_number_free_sco_slots:packets (%u) > total packets (%u)", num_sco_packets_sent, hci_stack->sco_packets_total_num); 665 return 0; 666 } 667 return hci_stack->sco_packets_total_num - num_sco_packets_sent; 668 } else { 669 // implicit flow control -- TODO 670 int num_ready = 0; 671 for (it = (btstack_linked_item_t *) hci_stack->connections; it ; it = it->next){ 672 hci_connection_t * connection = (hci_connection_t *) it; 673 if (connection->address_type != BD_ADDR_TYPE_SCO) continue; 674 if (connection->sco_tx_ready == 0) continue; 675 num_ready++; 676 } 677 return num_ready; 678 } 679 } 680 #endif 681 682 // only used to send HCI Host Number Completed Packets 683 static int hci_can_send_comand_packet_transport(void){ 684 if (hci_stack->hci_packet_buffer_reserved) return 0; 685 686 // check for async hci transport implementations 687 if (hci_stack->hci_transport->can_send_packet_now){ 688 if (!hci_stack->hci_transport->can_send_packet_now(HCI_COMMAND_DATA_PACKET)){ 689 return 0; 690 } 691 } 692 return 1; 693 } 694 695 // new functions replacing hci_can_send_packet_now[_using_packet_buffer] 696 bool hci_can_send_command_packet_now(void){ 697 if (hci_can_send_comand_packet_transport() == 0) return false; 698 return hci_stack->num_cmd_packets > 0u; 699 } 700 701 static int hci_transport_can_send_prepared_packet_now(uint8_t packet_type){ 702 // check for async hci transport implementations 703 if (!hci_stack->hci_transport->can_send_packet_now) return true; 704 return hci_stack->hci_transport->can_send_packet_now(packet_type); 705 } 706 707 static bool hci_can_send_prepared_acl_packet_for_address_type(bd_addr_type_t address_type){ 708 if (!hci_transport_can_send_prepared_packet_now(HCI_ACL_DATA_PACKET)) return false; 709 return hci_number_free_acl_slots_for_connection_type(address_type) > 0; 710 } 711 712 bool hci_can_send_acl_le_packet_now(void){ 713 if (hci_stack->hci_packet_buffer_reserved) return false; 714 return hci_can_send_prepared_acl_packet_for_address_type(BD_ADDR_TYPE_LE_PUBLIC); 715 } 716 717 bool hci_can_send_prepared_acl_packet_now(hci_con_handle_t con_handle) { 718 if (!hci_transport_can_send_prepared_packet_now(HCI_ACL_DATA_PACKET)) return false; 719 return hci_number_free_acl_slots_for_handle(con_handle) > 0; 720 } 721 722 bool hci_can_send_acl_packet_now(hci_con_handle_t con_handle){ 723 if (hci_stack->hci_packet_buffer_reserved) return false; 724 return hci_can_send_prepared_acl_packet_now(con_handle); 725 } 726 727 #ifdef ENABLE_CLASSIC 728 bool hci_can_send_acl_classic_packet_now(void){ 729 if (hci_stack->hci_packet_buffer_reserved) return false; 730 return hci_can_send_prepared_acl_packet_for_address_type(BD_ADDR_TYPE_ACL); 731 } 732 733 bool hci_can_send_prepared_sco_packet_now(void){ 734 if (!hci_transport_can_send_prepared_packet_now(HCI_SCO_DATA_PACKET)) return false; 735 if (hci_have_usb_transport()){ 736 return hci_stack->sco_can_send_now; 737 } else { 738 return hci_number_free_sco_slots() > 0; 739 } 740 } 741 742 bool hci_can_send_sco_packet_now(void){ 743 if (hci_stack->hci_packet_buffer_reserved) return false; 744 return hci_can_send_prepared_sco_packet_now(); 745 } 746 747 void hci_request_sco_can_send_now_event(void){ 748 hci_stack->sco_waiting_for_can_send_now = 1; 749 hci_notify_if_sco_can_send_now(); 750 } 751 #endif 752 753 // used for internal checks in l2cap.c 754 bool hci_is_packet_buffer_reserved(void){ 755 return hci_stack->hci_packet_buffer_reserved; 756 } 757 758 // reserves outgoing packet buffer. 759 // @return 1 if successful 760 bool hci_reserve_packet_buffer(void){ 761 if (hci_stack->hci_packet_buffer_reserved) { 762 log_error("hci_reserve_packet_buffer called but buffer already reserved"); 763 return false; 764 } 765 hci_stack->hci_packet_buffer_reserved = true; 766 return true; 767 } 768 769 void hci_release_packet_buffer(void){ 770 hci_stack->hci_packet_buffer_reserved = false; 771 } 772 773 // assumption: synchronous implementations don't provide can_send_packet_now as they don't keep the buffer after the call 774 static int hci_transport_synchronous(void){ 775 return hci_stack->hci_transport->can_send_packet_now == NULL; 776 } 777 778 static uint8_t hci_send_acl_packet_fragments(hci_connection_t *connection){ 779 780 // log_info("hci_send_acl_packet_fragments %u/%u (con 0x%04x)", hci_stack->acl_fragmentation_pos, hci_stack->acl_fragmentation_total_size, connection->con_handle); 781 782 // max ACL data packet length depends on connection type (LE vs. Classic) and available buffers 783 uint16_t max_acl_data_packet_length = hci_stack->acl_data_packet_length; 784 if (hci_is_le_connection(connection) && (hci_stack->le_data_packets_length > 0u)){ 785 max_acl_data_packet_length = hci_stack->le_data_packets_length; 786 } 787 788 #ifdef ENABLE_LE_LIMIT_ACL_FRAGMENT_BY_MAX_OCTETS 789 if (hci_is_le_connection(connection) && (connection->le_max_tx_octets < max_acl_data_packet_length)){ 790 max_acl_data_packet_length = connection->le_max_tx_octets; 791 } 792 #endif 793 794 log_debug("hci_send_acl_packet_fragments entered"); 795 796 uint8_t status = ERROR_CODE_SUCCESS; 797 // multiple packets could be send on a synchronous HCI transport 798 while (true){ 799 800 log_debug("hci_send_acl_packet_fragments loop entered"); 801 802 // get current data 803 const uint16_t acl_header_pos = hci_stack->acl_fragmentation_pos - 4u; 804 int current_acl_data_packet_length = hci_stack->acl_fragmentation_total_size - hci_stack->acl_fragmentation_pos; 805 bool more_fragments = false; 806 807 // if ACL packet is larger than Bluetooth packet buffer, only send max_acl_data_packet_length 808 if (current_acl_data_packet_length > max_acl_data_packet_length){ 809 more_fragments = true; 810 current_acl_data_packet_length = max_acl_data_packet_length; 811 } 812 813 // copy handle_and_flags if not first fragment and update packet boundary flags to be 01 (continuing fragmnent) 814 if (acl_header_pos > 0u){ 815 uint16_t handle_and_flags = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 816 handle_and_flags = (handle_and_flags & 0xcfffu) | (1u << 12u); 817 little_endian_store_16(hci_stack->hci_packet_buffer, acl_header_pos, handle_and_flags); 818 } 819 820 // update header len 821 little_endian_store_16(hci_stack->hci_packet_buffer, acl_header_pos + 2u, current_acl_data_packet_length); 822 823 // count packet 824 connection->num_packets_sent++; 825 log_debug("hci_send_acl_packet_fragments loop before send (more fragments %d)", (int) more_fragments); 826 827 // update state for next fragment (if any) as "transport done" might be sent during send_packet already 828 if (more_fragments){ 829 // update start of next fragment to send 830 hci_stack->acl_fragmentation_pos += current_acl_data_packet_length; 831 } else { 832 // done 833 hci_stack->acl_fragmentation_pos = 0; 834 hci_stack->acl_fragmentation_total_size = 0; 835 } 836 837 // send packet 838 uint8_t * packet = &hci_stack->hci_packet_buffer[acl_header_pos]; 839 const int size = current_acl_data_packet_length + 4; 840 hci_dump_packet(HCI_ACL_DATA_PACKET, 0, packet, size); 841 hci_stack->acl_fragmentation_tx_active = 1; 842 int err = hci_stack->hci_transport->send_packet(HCI_ACL_DATA_PACKET, packet, size); 843 if (err != 0){ 844 // no error from HCI Transport expected 845 status = ERROR_CODE_HARDWARE_FAILURE; 846 } 847 848 log_debug("hci_send_acl_packet_fragments loop after send (more fragments %d)", (int) more_fragments); 849 850 // done yet? 851 if (!more_fragments) break; 852 853 // can send more? 854 if (!hci_can_send_prepared_acl_packet_now(connection->con_handle)) return status; 855 } 856 857 log_debug("hci_send_acl_packet_fragments loop over"); 858 859 // release buffer now for synchronous transport 860 if (hci_transport_synchronous()){ 861 hci_stack->acl_fragmentation_tx_active = 0; 862 hci_release_packet_buffer(); 863 hci_emit_transport_packet_sent(); 864 } 865 866 return status; 867 } 868 869 // pre: caller has reserved the packet buffer 870 uint8_t hci_send_acl_packet_buffer(int size){ 871 btstack_assert(hci_stack->hci_packet_buffer_reserved); 872 873 uint8_t * packet = hci_stack->hci_packet_buffer; 874 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(packet); 875 876 // check for free places on Bluetooth module 877 if (!hci_can_send_prepared_acl_packet_now(con_handle)) { 878 log_error("hci_send_acl_packet_buffer called but no free ACL buffers on controller"); 879 hci_release_packet_buffer(); 880 hci_emit_transport_packet_sent(); 881 return BTSTACK_ACL_BUFFERS_FULL; 882 } 883 884 hci_connection_t *connection = hci_connection_for_handle( con_handle); 885 if (!connection) { 886 log_error("hci_send_acl_packet_buffer called but no connection for handle 0x%04x", con_handle); 887 hci_release_packet_buffer(); 888 hci_emit_transport_packet_sent(); 889 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 890 } 891 892 #ifdef ENABLE_CLASSIC 893 hci_connection_timestamp(connection); 894 #endif 895 896 // hci_dump_packet( HCI_ACL_DATA_PACKET, 0, packet, size); 897 898 // setup data 899 hci_stack->acl_fragmentation_total_size = size; 900 hci_stack->acl_fragmentation_pos = 4; // start of L2CAP packet 901 902 return hci_send_acl_packet_fragments(connection); 903 } 904 905 #ifdef ENABLE_CLASSIC 906 // pre: caller has reserved the packet buffer 907 uint8_t hci_send_sco_packet_buffer(int size){ 908 btstack_assert(hci_stack->hci_packet_buffer_reserved); 909 910 uint8_t * packet = hci_stack->hci_packet_buffer; 911 912 // skip checks in loopback mode 913 if (!hci_stack->loopback_mode){ 914 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(packet); // same for ACL and SCO 915 916 // check for free places on Bluetooth module 917 if (!hci_can_send_prepared_sco_packet_now()) { 918 log_error("hci_send_sco_packet_buffer called but no free SCO buffers on controller"); 919 hci_release_packet_buffer(); 920 hci_emit_transport_packet_sent(); 921 return BTSTACK_ACL_BUFFERS_FULL; 922 } 923 924 // track send packet in connection struct 925 hci_connection_t *connection = hci_connection_for_handle( con_handle); 926 if (!connection) { 927 log_error("hci_send_sco_packet_buffer called but no connection for handle 0x%04x", con_handle); 928 hci_release_packet_buffer(); 929 hci_emit_transport_packet_sent(); 930 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 931 } 932 933 if (hci_have_usb_transport()){ 934 // token used 935 hci_stack->sco_can_send_now = false; 936 } else { 937 if (hci_stack->synchronous_flow_control_enabled){ 938 connection->num_packets_sent++; 939 } else { 940 connection->sco_tx_ready--; 941 } 942 } 943 } 944 945 hci_dump_packet( HCI_SCO_DATA_PACKET, 0, packet, size); 946 947 #ifdef HAVE_SCO_TRANSPORT 948 hci_stack->sco_transport->send_packet(packet, size); 949 hci_release_packet_buffer(); 950 hci_emit_transport_packet_sent(); 951 952 return 0; 953 #else 954 int err = hci_stack->hci_transport->send_packet(HCI_SCO_DATA_PACKET, packet, size); 955 if (hci_transport_synchronous()){ 956 hci_release_packet_buffer(); 957 hci_emit_transport_packet_sent(); 958 } 959 960 if (err != 0){ 961 return ERROR_CODE_HARDWARE_FAILURE; 962 } 963 return ERROR_CODE_SUCCESS; 964 #endif 965 } 966 #endif 967 968 static void acl_handler(uint8_t *packet, uint16_t size){ 969 970 // get info 971 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(packet); 972 hci_connection_t *conn = hci_connection_for_handle(con_handle); 973 uint8_t acl_flags = READ_ACL_FLAGS(packet); 974 uint16_t acl_length = READ_ACL_LENGTH(packet); 975 976 // ignore non-registered handle 977 if (!conn){ 978 log_error("acl_handler called with non-registered handle %u!" , con_handle); 979 return; 980 } 981 982 // assert packet is complete 983 if ((acl_length + 4u) != size){ 984 log_error("acl_handler called with ACL packet of wrong size %d, expected %u => dropping packet", size, acl_length + 4); 985 return; 986 } 987 988 #ifdef ENABLE_CLASSIC 989 // update idle timestamp 990 hci_connection_timestamp(conn); 991 #endif 992 993 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 994 hci_stack->host_completed_packets = 1; 995 conn->num_packets_completed++; 996 #endif 997 998 // handle different packet types 999 switch (acl_flags & 0x03u) { 1000 1001 case 0x01: // continuation fragment 1002 1003 // sanity checks 1004 if (conn->acl_recombination_pos == 0u) { 1005 log_error( "ACL Cont Fragment but no first fragment for handle 0x%02x", con_handle); 1006 return; 1007 } 1008 if ((conn->acl_recombination_pos + acl_length) > (4u + HCI_ACL_BUFFER_SIZE)){ 1009 log_error( "ACL Cont Fragment to large: combined packet %u > buffer size %u for handle 0x%02x", 1010 conn->acl_recombination_pos + acl_length, 4 + HCI_ACL_BUFFER_SIZE, con_handle); 1011 conn->acl_recombination_pos = 0; 1012 return; 1013 } 1014 1015 // append fragment payload (header already stored) 1016 (void)memcpy(&conn->acl_recombination_buffer[HCI_INCOMING_PRE_BUFFER_SIZE + conn->acl_recombination_pos], 1017 &packet[4], acl_length); 1018 conn->acl_recombination_pos += acl_length; 1019 1020 // forward complete L2CAP packet if complete. 1021 if (conn->acl_recombination_pos >= (conn->acl_recombination_length + 4u + 4u)){ // pos already incl. ACL header 1022 hci_emit_acl_packet(&conn->acl_recombination_buffer[HCI_INCOMING_PRE_BUFFER_SIZE], conn->acl_recombination_pos); 1023 // reset recombination buffer 1024 conn->acl_recombination_length = 0; 1025 conn->acl_recombination_pos = 0; 1026 } 1027 break; 1028 1029 case 0x02: { // first fragment 1030 1031 // sanity check 1032 if (conn->acl_recombination_pos) { 1033 log_error( "ACL First Fragment but data in buffer for handle 0x%02x, dropping stale fragments", con_handle); 1034 conn->acl_recombination_pos = 0; 1035 } 1036 1037 // peek into L2CAP packet! 1038 uint16_t l2cap_length = READ_L2CAP_LENGTH( packet ); 1039 1040 // compare fragment size to L2CAP packet size 1041 if (acl_length >= (l2cap_length + 4u)){ 1042 // forward fragment as L2CAP packet 1043 hci_emit_acl_packet(packet, acl_length + 4u); 1044 } else { 1045 1046 if (acl_length > HCI_ACL_BUFFER_SIZE){ 1047 log_error( "ACL First Fragment to large: fragment %u > buffer size %u for handle 0x%02x", 1048 4 + acl_length, 4 + HCI_ACL_BUFFER_SIZE, con_handle); 1049 return; 1050 } 1051 1052 // store first fragment and tweak acl length for complete package 1053 (void)memcpy(&conn->acl_recombination_buffer[HCI_INCOMING_PRE_BUFFER_SIZE], 1054 packet, acl_length + 4u); 1055 conn->acl_recombination_pos = acl_length + 4u; 1056 conn->acl_recombination_length = l2cap_length; 1057 little_endian_store_16(conn->acl_recombination_buffer, HCI_INCOMING_PRE_BUFFER_SIZE + 2u, l2cap_length +4u); 1058 } 1059 break; 1060 1061 } 1062 default: 1063 log_error( "acl_handler called with invalid packet boundary flags %u", acl_flags & 0x03); 1064 return; 1065 } 1066 1067 // execute main loop 1068 hci_run(); 1069 } 1070 1071 static void hci_connection_stop_timer(hci_connection_t * conn){ 1072 btstack_run_loop_remove_timer(&conn->timeout); 1073 #ifdef ENABLE_CLASSIC 1074 btstack_run_loop_remove_timer(&conn->timeout_sco); 1075 #endif 1076 } 1077 1078 static void hci_shutdown_connection(hci_connection_t *conn){ 1079 log_info("Connection closed: handle 0x%x, %s", conn->con_handle, bd_addr_to_str(conn->address)); 1080 1081 #ifdef ENABLE_CLASSIC 1082 #if defined(ENABLE_SCO_OVER_HCI) || defined(HAVE_SCO_TRANSPORT) 1083 bd_addr_type_t addr_type = conn->address_type; 1084 #endif 1085 #ifdef HAVE_SCO_TRANSPORT 1086 hci_con_handle_t con_handle = conn->con_handle; 1087 #endif 1088 #endif 1089 1090 hci_connection_stop_timer(conn); 1091 1092 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 1093 btstack_memory_hci_connection_free( conn ); 1094 1095 // now it's gone 1096 hci_emit_nr_connections_changed(); 1097 1098 #ifdef ENABLE_CLASSIC 1099 #ifdef ENABLE_SCO_OVER_HCI 1100 // update SCO 1101 if ((addr_type == BD_ADDR_TYPE_SCO) && (hci_stack->hci_transport != NULL) && (hci_stack->hci_transport->set_sco_config != NULL)){ 1102 hci_stack->hci_transport->set_sco_config(hci_stack->sco_voice_setting_active, hci_number_sco_connections()); 1103 } 1104 #endif 1105 #ifdef HAVE_SCO_TRANSPORT 1106 if ((addr_type == BD_ADDR_TYPE_SCO) && (hci_stack->sco_transport != NULL)){ 1107 hci_stack->sco_transport->close(con_handle); 1108 } 1109 #endif 1110 #endif 1111 } 1112 1113 #ifdef ENABLE_CLASSIC 1114 1115 static const uint16_t packet_type_sizes[] = { 1116 0, HCI_ACL_2DH1_SIZE, HCI_ACL_3DH1_SIZE, HCI_ACL_DM1_SIZE, 1117 HCI_ACL_DH1_SIZE, 0, 0, 0, 1118 HCI_ACL_2DH3_SIZE, HCI_ACL_3DH3_SIZE, HCI_ACL_DM3_SIZE, HCI_ACL_DH3_SIZE, 1119 HCI_ACL_2DH5_SIZE, HCI_ACL_3DH5_SIZE, HCI_ACL_DM5_SIZE, HCI_ACL_DH5_SIZE 1120 }; 1121 static const uint8_t packet_type_feature_requirement_bit[] = { 1122 0, // 3 slot packets 1123 1, // 5 slot packets 1124 25, // EDR 2 mpbs 1125 26, // EDR 3 mbps 1126 39, // 3 slot EDR packts 1127 40, // 5 slot EDR packet 1128 }; 1129 static const uint16_t packet_type_feature_packet_mask[] = { 1130 0x0f00, // 3 slot packets 1131 0xf000, // 5 slot packets 1132 0x1102, // EDR 2 mpbs 1133 0x2204, // EDR 3 mbps 1134 0x0300, // 3 slot EDR packts 1135 0x3000, // 5 slot EDR packet 1136 }; 1137 1138 static uint16_t hci_acl_packet_types_for_buffer_size_and_local_features(uint16_t buffer_size, uint8_t * local_supported_features){ 1139 // enable packet types based on size 1140 uint16_t packet_types = 0; 1141 unsigned int i; 1142 for (i=0;i<16;i++){ 1143 if (packet_type_sizes[i] == 0) continue; 1144 if (packet_type_sizes[i] <= buffer_size){ 1145 packet_types |= 1 << i; 1146 } 1147 } 1148 // disable packet types due to missing local supported features 1149 for (i=0;i<sizeof(packet_type_feature_requirement_bit);i++){ 1150 unsigned int bit_idx = packet_type_feature_requirement_bit[i]; 1151 int feature_set = (local_supported_features[bit_idx >> 3] & (1<<(bit_idx & 7))) != 0; 1152 if (feature_set) continue; 1153 log_info("Features bit %02u is not set, removing packet types 0x%04x", bit_idx, packet_type_feature_packet_mask[i]); 1154 packet_types &= ~packet_type_feature_packet_mask[i]; 1155 } 1156 // flip bits for "may not be used" 1157 packet_types ^= 0x3306; 1158 return packet_types; 1159 } 1160 1161 uint16_t hci_usable_acl_packet_types(void){ 1162 return hci_stack->packet_types; 1163 } 1164 #endif 1165 1166 uint8_t* hci_get_outgoing_packet_buffer(void){ 1167 // hci packet buffer is >= acl data packet length 1168 return hci_stack->hci_packet_buffer; 1169 } 1170 1171 uint16_t hci_max_acl_data_packet_length(void){ 1172 return hci_stack->acl_data_packet_length; 1173 } 1174 1175 #ifdef ENABLE_CLASSIC 1176 bool hci_extended_sco_link_supported(void){ 1177 // No. 31, byte 3, bit 7 1178 return (hci_stack->local_supported_features[3] & (1 << 7)) != 0; 1179 } 1180 #endif 1181 1182 bool hci_non_flushable_packet_boundary_flag_supported(void){ 1183 // No. 54, byte 6, bit 6 1184 return (hci_stack->local_supported_features[6u] & (1u << 6u)) != 0u; 1185 } 1186 1187 #ifdef ENABLE_CLASSIC 1188 static int gap_ssp_supported(void){ 1189 // No. 51, byte 6, bit 3 1190 return (hci_stack->local_supported_features[6u] & (1u << 3u)) != 0u; 1191 } 1192 #endif 1193 1194 static int hci_classic_supported(void){ 1195 #ifdef ENABLE_CLASSIC 1196 // No. 37, byte 4, bit 5, = No BR/EDR Support 1197 return (hci_stack->local_supported_features[4] & (1 << 5)) == 0; 1198 #else 1199 return 0; 1200 #endif 1201 } 1202 1203 static int hci_le_supported(void){ 1204 #ifdef ENABLE_BLE 1205 // No. 37, byte 4, bit 6 = LE Supported (Controller) 1206 return (hci_stack->local_supported_features[4u] & (1u << 6u)) != 0u; 1207 #else 1208 return 0; 1209 #endif 1210 } 1211 1212 static bool hci_command_supported(uint8_t command_index){ 1213 return (hci_stack->local_supported_commands & (1LU << command_index)) != 0; 1214 } 1215 1216 #ifdef ENABLE_BLE 1217 1218 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 1219 static bool hci_extended_advertising_supported(void){ 1220 return hci_command_supported(SUPPORTED_HCI_COMMAND_LE_SET_EXTENDED_ADVERTISING_ENABLE); 1221 } 1222 #endif 1223 1224 static void hci_get_own_address_for_addr_type(uint8_t own_addr_type, bd_addr_t own_addr){ 1225 if (own_addr_type == BD_ADDR_TYPE_LE_PUBLIC){ 1226 (void)memcpy(own_addr, hci_stack->local_bd_addr, 6); 1227 } else { 1228 (void)memcpy(own_addr, hci_stack->le_random_address, 6); 1229 } 1230 } 1231 1232 void gap_le_get_own_address(uint8_t * addr_type, bd_addr_t addr){ 1233 *addr_type = hci_stack->le_own_addr_type; 1234 hci_get_own_address_for_addr_type(hci_stack->le_own_addr_type, addr); 1235 } 1236 1237 #ifdef ENABLE_LE_PERIPHERAL 1238 void gap_le_get_own_advertisements_address(uint8_t * addr_type, bd_addr_t addr){ 1239 *addr_type = hci_stack->le_advertisements_own_addr_type; 1240 hci_get_own_address_for_addr_type(hci_stack->le_advertisements_own_addr_type, addr); 1241 }; 1242 #endif 1243 1244 #ifdef ENABLE_LE_CENTRAL 1245 1246 /** 1247 * @brief Get own addr type and address used for LE connections (Central) 1248 */ 1249 void gap_le_get_own_connection_address(uint8_t * addr_type, bd_addr_t addr){ 1250 *addr_type = hci_stack->le_connection_own_addr_type; 1251 hci_get_own_address_for_addr_type(hci_stack->le_connection_own_addr_type, addr); 1252 } 1253 1254 void le_handle_advertisement_report(uint8_t *packet, uint16_t size){ 1255 1256 uint16_t offset = 3; 1257 uint8_t num_reports = packet[offset]; 1258 offset += 1; 1259 1260 uint16_t i; 1261 uint8_t event[12 + LE_ADVERTISING_DATA_SIZE]; // use upper bound to avoid var size automatic var 1262 for (i=0; (i<num_reports) && (offset < size);i++){ 1263 // sanity checks on data_length: 1264 uint8_t data_length = packet[offset + 8]; 1265 if (data_length > LE_ADVERTISING_DATA_SIZE) return; 1266 if ((offset + 9u + data_length + 1u) > size) return; 1267 // setup event 1268 uint8_t event_size = 10u + data_length; 1269 uint16_t pos = 0; 1270 event[pos++] = GAP_EVENT_ADVERTISING_REPORT; 1271 event[pos++] = event_size; 1272 (void)memcpy(&event[pos], &packet[offset], 1 + 1 + 6); // event type + address type + address 1273 offset += 8; 1274 pos += 8; 1275 event[pos++] = packet[offset + 1 + data_length]; // rssi 1276 event[pos++] = data_length; 1277 offset++; 1278 (void)memcpy(&event[pos], &packet[offset], data_length); 1279 pos += data_length; 1280 offset += data_length + 1u; // rssi 1281 hci_emit_event(event, pos, 1); 1282 } 1283 } 1284 1285 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 1286 void le_handle_extended_advertisement_report(uint8_t *packet, uint16_t size) { 1287 uint16_t offset = 3; 1288 uint8_t num_reports = packet[offset++]; 1289 uint8_t event[2 + 255]; // use upper bound to avoid var size automatic var 1290 uint8_t i; 1291 for (i=0; (i<num_reports) && (offset < size);i++){ 1292 // sanity checks on data_length: 1293 uint16_t data_length = packet[offset + 23]; 1294 if (data_length > LE_ADVERTISING_DATA_SIZE) return; 1295 if ((offset + 24u + data_length) > size) return; 1296 uint16_t event_type = little_endian_read_16(packet, offset); 1297 offset += 2; 1298 if ((event_type & 0x10) != 0) { 1299 // setup legacy event 1300 uint8_t legacy_event_type; 1301 switch (event_type){ 1302 case 0b0010011: 1303 // ADV_IND 1304 legacy_event_type = 0; 1305 break; 1306 case 0b0010101: 1307 // ADV_DIRECT_IND 1308 legacy_event_type = 1; 1309 break; 1310 case 0b0010010: 1311 // ADV_SCAN_IND 1312 legacy_event_type = 2; 1313 break; 1314 case 0b0010000: 1315 // ADV_NONCONN_IND 1316 legacy_event_type = 3; 1317 break; 1318 case 0b0011011: 1319 case 0b0011010: 1320 // SCAN_RSP 1321 legacy_event_type = 4; 1322 break; 1323 default: 1324 legacy_event_type = 0; 1325 break; 1326 } 1327 uint16_t pos = 0; 1328 event[pos++] = GAP_EVENT_ADVERTISING_REPORT; 1329 event[pos++] = 10u + data_length; 1330 event[pos++] = legacy_event_type; 1331 // copy address type + address 1332 (void) memcpy(&event[pos], &packet[offset], 1 + 6); 1333 offset += 7; 1334 pos += 7; 1335 // skip primary_phy, secondary_phy, advertising_sid, tx_power 1336 offset += 4; 1337 // copy rssi 1338 event[pos++] = packet[offset++]; 1339 // skip periodic advertising interval and direct address 1340 offset += 9; 1341 // copy data len + data; 1342 (void) memcpy(&event[pos], &packet[offset], 1 + data_length); 1343 pos += 1 +data_length; 1344 offset += 1+ data_length; 1345 hci_emit_event(event, pos, 1); 1346 } else { 1347 event[0] = GAP_EVENT_EXTENDED_ADVERTISING_REPORT; 1348 uint8_t report_len = 24 + data_length; 1349 event[1] = report_len; 1350 memcpy(&event[2], &packet[offset], report_len); 1351 offset += report_len; 1352 hci_emit_event(event, 2 + report_len, 1); 1353 } 1354 } 1355 } 1356 #endif 1357 1358 #endif 1359 #endif 1360 1361 #ifdef ENABLE_BLE 1362 #ifdef ENABLE_LE_PERIPHERAL 1363 static void hci_update_advertisements_enabled_for_current_roles(void){ 1364 if ((hci_stack->le_advertisements_state & LE_ADVERTISEMENT_STATE_ENABLED) != 0){ 1365 // get number of active le slave connections 1366 int num_slave_connections = 0; 1367 btstack_linked_list_iterator_t it; 1368 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 1369 while (btstack_linked_list_iterator_has_next(&it)){ 1370 hci_connection_t * con = (hci_connection_t*) btstack_linked_list_iterator_next(&it); 1371 log_info("state %u, role %u, le_con %u", con->state, con->role, hci_is_le_connection(con)); 1372 if (con->state != OPEN) continue; 1373 if (con->role != HCI_ROLE_SLAVE) continue; 1374 if (!hci_is_le_connection(con)) continue; 1375 num_slave_connections++; 1376 } 1377 log_info("Num LE Peripheral roles: %u of %u", num_slave_connections, hci_stack->le_max_number_peripheral_connections); 1378 hci_stack->le_advertisements_enabled_for_current_roles = num_slave_connections < hci_stack->le_max_number_peripheral_connections; 1379 } else { 1380 hci_stack->le_advertisements_enabled_for_current_roles = false; 1381 } 1382 } 1383 #endif 1384 #endif 1385 1386 #ifdef ENABLE_CLASSIC 1387 static void gap_run_set_local_name(void){ 1388 hci_reserve_packet_buffer(); 1389 uint8_t * packet = hci_stack->hci_packet_buffer; 1390 // construct HCI Command and send 1391 uint16_t opcode = hci_write_local_name.opcode; 1392 hci_stack->last_cmd_opcode = opcode; 1393 packet[0] = opcode & 0xff; 1394 packet[1] = opcode >> 8; 1395 packet[2] = DEVICE_NAME_LEN; 1396 memset(&packet[3], 0, DEVICE_NAME_LEN); 1397 uint16_t name_len = (uint16_t) strlen(hci_stack->local_name); 1398 uint16_t bytes_to_copy = btstack_min(name_len, DEVICE_NAME_LEN); 1399 // if shorter than DEVICE_NAME_LEN, it's implicitly NULL-terminated by memset call 1400 (void)memcpy(&packet[3], hci_stack->local_name, bytes_to_copy); 1401 // expand '00:00:00:00:00:00' in name with bd_addr 1402 btstack_replace_bd_addr_placeholder(&packet[3], bytes_to_copy, hci_stack->local_bd_addr); 1403 hci_send_cmd_packet(packet, HCI_CMD_HEADER_SIZE + DEVICE_NAME_LEN); 1404 } 1405 1406 static void gap_run_set_eir_data(void){ 1407 hci_reserve_packet_buffer(); 1408 uint8_t * packet = hci_stack->hci_packet_buffer; 1409 // construct HCI Command in-place and send 1410 uint16_t opcode = hci_write_extended_inquiry_response.opcode; 1411 hci_stack->last_cmd_opcode = opcode; 1412 uint16_t offset = 0; 1413 packet[offset++] = opcode & 0xff; 1414 packet[offset++] = opcode >> 8; 1415 packet[offset++] = 1 + EXTENDED_INQUIRY_RESPONSE_DATA_LEN; 1416 packet[offset++] = 0; // FEC not required 1417 memset(&packet[offset], 0, EXTENDED_INQUIRY_RESPONSE_DATA_LEN); 1418 if (hci_stack->eir_data){ 1419 // copy items and expand '00:00:00:00:00:00' in name with bd_addr 1420 ad_context_t context; 1421 for (ad_iterator_init(&context, EXTENDED_INQUIRY_RESPONSE_DATA_LEN, hci_stack->eir_data) ; ad_iterator_has_more(&context) ; ad_iterator_next(&context)) { 1422 uint8_t data_type = ad_iterator_get_data_type(&context); 1423 uint8_t size = ad_iterator_get_data_len(&context); 1424 const uint8_t *data = ad_iterator_get_data(&context); 1425 // copy item 1426 packet[offset++] = size + 1; 1427 packet[offset++] = data_type; 1428 memcpy(&packet[offset], data, size); 1429 // update name item 1430 if ((data_type == BLUETOOTH_DATA_TYPE_SHORTENED_LOCAL_NAME) || (data_type == BLUETOOTH_DATA_TYPE_COMPLETE_LOCAL_NAME)){ 1431 btstack_replace_bd_addr_placeholder(&packet[offset], size, hci_stack->local_bd_addr); 1432 } 1433 offset += size; 1434 } 1435 } else { 1436 uint16_t name_len = (uint16_t) strlen(hci_stack->local_name); 1437 uint16_t bytes_to_copy = btstack_min(name_len, EXTENDED_INQUIRY_RESPONSE_DATA_LEN - 2); 1438 packet[offset++] = bytes_to_copy + 1; 1439 packet[offset++] = BLUETOOTH_DATA_TYPE_COMPLETE_LOCAL_NAME; 1440 (void)memcpy(&packet[6], hci_stack->local_name, bytes_to_copy); 1441 // expand '00:00:00:00:00:00' in name with bd_addr 1442 btstack_replace_bd_addr_placeholder(&packet[offset], bytes_to_copy, hci_stack->local_bd_addr); 1443 } 1444 hci_send_cmd_packet(packet, HCI_CMD_HEADER_SIZE + 1 + EXTENDED_INQUIRY_RESPONSE_DATA_LEN); 1445 } 1446 1447 static void hci_run_gap_tasks_classic(void){ 1448 if ((hci_stack->gap_tasks_classic & GAP_TASK_SET_CLASS_OF_DEVICE) != 0) { 1449 hci_stack->gap_tasks_classic &= ~GAP_TASK_SET_CLASS_OF_DEVICE; 1450 hci_send_cmd(&hci_write_class_of_device, hci_stack->class_of_device); 1451 return; 1452 } 1453 if ((hci_stack->gap_tasks_classic & GAP_TASK_SET_LOCAL_NAME) != 0) { 1454 hci_stack->gap_tasks_classic &= ~GAP_TASK_SET_LOCAL_NAME; 1455 gap_run_set_local_name(); 1456 return; 1457 } 1458 if ((hci_stack->gap_tasks_classic & GAP_TASK_SET_EIR_DATA) != 0) { 1459 hci_stack->gap_tasks_classic &= ~GAP_TASK_SET_EIR_DATA; 1460 gap_run_set_eir_data(); 1461 return; 1462 } 1463 if ((hci_stack->gap_tasks_classic & GAP_TASK_SET_DEFAULT_LINK_POLICY) != 0) { 1464 hci_stack->gap_tasks_classic &= ~GAP_TASK_SET_DEFAULT_LINK_POLICY; 1465 hci_send_cmd(&hci_write_default_link_policy_setting, hci_stack->default_link_policy_settings); 1466 return; 1467 } 1468 // write page scan activity 1469 if ((hci_stack->gap_tasks_classic & GAP_TASK_WRITE_PAGE_SCAN_ACTIVITY) != 0) { 1470 hci_stack->gap_tasks_classic &= ~GAP_TASK_WRITE_PAGE_SCAN_ACTIVITY; 1471 hci_send_cmd(&hci_write_page_scan_activity, hci_stack->new_page_scan_interval, hci_stack->new_page_scan_window); 1472 return; 1473 } 1474 // write page scan type 1475 if ((hci_stack->gap_tasks_classic & GAP_TASK_WRITE_PAGE_SCAN_TYPE) != 0) { 1476 hci_stack->gap_tasks_classic &= ~GAP_TASK_WRITE_PAGE_SCAN_TYPE; 1477 hci_send_cmd(&hci_write_page_scan_type, hci_stack->new_page_scan_type); 1478 return; 1479 } 1480 // write page timeout 1481 if ((hci_stack->gap_tasks_classic & GAP_TASK_WRITE_PAGE_TIMEOUT) != 0) { 1482 hci_stack->gap_tasks_classic &= ~GAP_TASK_WRITE_PAGE_TIMEOUT; 1483 hci_send_cmd(&hci_write_page_timeout, hci_stack->page_timeout); 1484 return; 1485 } 1486 // send scan enable 1487 if ((hci_stack->gap_tasks_classic & GAP_TASK_WRITE_SCAN_ENABLE) != 0) { 1488 hci_stack->gap_tasks_classic &= ~GAP_TASK_WRITE_SCAN_ENABLE; 1489 hci_send_cmd(&hci_write_scan_enable, hci_stack->new_scan_enable_value); 1490 return; 1491 } 1492 // send write scan activity 1493 if ((hci_stack->gap_tasks_classic & GAP_TASK_WRITE_INQUIRY_SCAN_ACTIVITY) != 0) { 1494 hci_stack->gap_tasks_classic &= ~GAP_TASK_WRITE_INQUIRY_SCAN_ACTIVITY; 1495 hci_send_cmd(&hci_write_inquiry_scan_activity, hci_stack->inquiry_scan_interval, hci_stack->inquiry_scan_window); 1496 return; 1497 } 1498 } 1499 #endif 1500 1501 #ifndef HAVE_HOST_CONTROLLER_API 1502 1503 static uint32_t hci_transport_uart_get_main_baud_rate(void){ 1504 if (!hci_stack->config) return 0; 1505 uint32_t baud_rate = ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_main; 1506 // Limit baud rate for Broadcom chipsets to 3 mbps 1507 if ((hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION) && (baud_rate > 3000000)){ 1508 baud_rate = 3000000; 1509 } 1510 return baud_rate; 1511 } 1512 1513 static void hci_initialization_timeout_handler(btstack_timer_source_t * ds){ 1514 UNUSED(ds); 1515 1516 switch (hci_stack->substate){ 1517 case HCI_INIT_W4_SEND_RESET: 1518 log_info("Resend HCI Reset"); 1519 hci_stack->substate = HCI_INIT_SEND_RESET; 1520 hci_stack->num_cmd_packets = 1; 1521 hci_run(); 1522 break; 1523 case HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT_LINK_RESET: 1524 log_info("Resend HCI Reset - CSR Warm Boot with Link Reset"); 1525 if (hci_stack->hci_transport->reset_link){ 1526 hci_stack->hci_transport->reset_link(); 1527 } 1528 1529 /* fall through */ 1530 1531 case HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT: 1532 log_info("Resend HCI Reset - CSR Warm Boot"); 1533 hci_stack->substate = HCI_INIT_SEND_RESET_CSR_WARM_BOOT; 1534 hci_stack->num_cmd_packets = 1; 1535 hci_run(); 1536 break; 1537 case HCI_INIT_W4_SEND_BAUD_CHANGE: 1538 if (hci_stack->hci_transport->set_baudrate){ 1539 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1540 log_info("Local baud rate change to %" PRIu32 "(timeout handler)", baud_rate); 1541 hci_stack->hci_transport->set_baudrate(baud_rate); 1542 } 1543 // For CSR, HCI Reset is sent on new baud rate. Don't forget to reset link for H5/BCSP 1544 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_CAMBRIDGE_SILICON_RADIO){ 1545 if (hci_stack->hci_transport->reset_link){ 1546 log_info("Link Reset"); 1547 hci_stack->hci_transport->reset_link(); 1548 } 1549 hci_stack->substate = HCI_INIT_SEND_RESET_CSR_WARM_BOOT; 1550 hci_run(); 1551 } 1552 break; 1553 case HCI_INIT_W4_CUSTOM_INIT_BCM_DELAY: 1554 // otherwise continue 1555 hci_stack->substate = HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS; 1556 hci_send_cmd(&hci_read_local_supported_commands); 1557 break; 1558 default: 1559 break; 1560 } 1561 } 1562 #endif 1563 1564 static void hci_initializing_next_state(void){ 1565 hci_stack->substate = (hci_substate_t )( ((int) hci_stack->substate) + 1); 1566 } 1567 1568 static void hci_init_done(void){ 1569 // done. tell the app 1570 log_info("hci_init_done -> HCI_STATE_WORKING"); 1571 hci_stack->state = HCI_STATE_WORKING; 1572 hci_emit_state(); 1573 } 1574 1575 // assumption: hci_can_send_command_packet_now() == true 1576 static void hci_initializing_run(void){ 1577 log_debug("hci_initializing_run: substate %u, can send %u", hci_stack->substate, hci_can_send_command_packet_now()); 1578 1579 if (!hci_can_send_command_packet_now()) return; 1580 1581 #ifndef HAVE_HOST_CONTROLLER_API 1582 bool need_baud_change = hci_stack->config 1583 && hci_stack->chipset 1584 && hci_stack->chipset->set_baudrate_command 1585 && hci_stack->hci_transport->set_baudrate 1586 && ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_main; 1587 #endif 1588 1589 switch (hci_stack->substate){ 1590 case HCI_INIT_SEND_RESET: 1591 hci_state_reset(); 1592 1593 #ifndef HAVE_HOST_CONTROLLER_API 1594 // prepare reset if command complete not received in 100ms 1595 btstack_run_loop_set_timer(&hci_stack->timeout, HCI_RESET_RESEND_TIMEOUT_MS); 1596 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_initialization_timeout_handler); 1597 btstack_run_loop_add_timer(&hci_stack->timeout); 1598 #endif 1599 // send command 1600 hci_stack->substate = HCI_INIT_W4_SEND_RESET; 1601 hci_send_cmd(&hci_reset); 1602 break; 1603 case HCI_INIT_SEND_READ_LOCAL_VERSION_INFORMATION: 1604 hci_send_cmd(&hci_read_local_version_information); 1605 hci_stack->substate = HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION; 1606 break; 1607 1608 #ifndef HAVE_HOST_CONTROLLER_API 1609 case HCI_INIT_SEND_READ_LOCAL_NAME: 1610 hci_send_cmd(&hci_read_local_name); 1611 hci_stack->substate = HCI_INIT_W4_SEND_READ_LOCAL_NAME; 1612 break; 1613 case HCI_INIT_SEND_RESET_CSR_WARM_BOOT: 1614 hci_state_reset(); 1615 // prepare reset if command complete not received in 100ms 1616 btstack_run_loop_set_timer(&hci_stack->timeout, HCI_RESET_RESEND_TIMEOUT_MS); 1617 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_initialization_timeout_handler); 1618 btstack_run_loop_add_timer(&hci_stack->timeout); 1619 // send command 1620 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT; 1621 hci_send_cmd(&hci_reset); 1622 break; 1623 case HCI_INIT_SEND_RESET_ST_WARM_BOOT: 1624 hci_state_reset(); 1625 hci_stack->substate = HCI_INIT_W4_SEND_RESET_ST_WARM_BOOT; 1626 hci_send_cmd(&hci_reset); 1627 break; 1628 case HCI_INIT_SEND_BAUD_CHANGE_BCM: { 1629 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1630 hci_stack->chipset->set_baudrate_command(baud_rate, hci_stack->hci_packet_buffer); 1631 hci_stack->last_cmd_opcode = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 1632 hci_stack->substate = HCI_INIT_W4_SEND_BAUD_CHANGE_BCM; 1633 hci_send_cmd_packet(hci_stack->hci_packet_buffer, 3u + hci_stack->hci_packet_buffer[2u]); 1634 break; 1635 } 1636 case HCI_INIT_SET_BD_ADDR: 1637 log_info("Set Public BD ADDR to %s", bd_addr_to_str(hci_stack->custom_bd_addr)); 1638 hci_stack->chipset->set_bd_addr_command(hci_stack->custom_bd_addr, hci_stack->hci_packet_buffer); 1639 hci_stack->last_cmd_opcode = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 1640 hci_stack->substate = HCI_INIT_W4_SET_BD_ADDR; 1641 hci_send_cmd_packet(hci_stack->hci_packet_buffer, 3u + hci_stack->hci_packet_buffer[2u]); 1642 break; 1643 case HCI_INIT_SEND_BAUD_CHANGE: 1644 if (need_baud_change) { 1645 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1646 hci_stack->chipset->set_baudrate_command(baud_rate, hci_stack->hci_packet_buffer); 1647 hci_stack->last_cmd_opcode = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 1648 hci_stack->substate = HCI_INIT_W4_SEND_BAUD_CHANGE; 1649 hci_send_cmd_packet(hci_stack->hci_packet_buffer, 3u + hci_stack->hci_packet_buffer[2u]); 1650 // STLC25000D: baudrate change happens within 0.5 s after command was send, 1651 // use timer to update baud rate after 100 ms (knowing exactly, when command was sent is non-trivial) 1652 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_ST_MICROELECTRONICS){ 1653 btstack_run_loop_set_timer(&hci_stack->timeout, HCI_RESET_RESEND_TIMEOUT_MS); 1654 btstack_run_loop_add_timer(&hci_stack->timeout); 1655 } 1656 break; 1657 } 1658 1659 /* fall through */ 1660 1661 case HCI_INIT_CUSTOM_INIT: 1662 // Custom initialization 1663 if (hci_stack->chipset && hci_stack->chipset->next_command){ 1664 hci_stack->chipset_result = (*hci_stack->chipset->next_command)(hci_stack->hci_packet_buffer); 1665 bool send_cmd = false; 1666 switch (hci_stack->chipset_result){ 1667 case BTSTACK_CHIPSET_VALID_COMMAND: 1668 send_cmd = true; 1669 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT; 1670 break; 1671 case BTSTACK_CHIPSET_WARMSTART_REQUIRED: 1672 send_cmd = true; 1673 // CSR Warm Boot: Wait a bit, then send HCI Reset until HCI Command Complete 1674 log_info("CSR Warm Boot"); 1675 btstack_run_loop_set_timer(&hci_stack->timeout, HCI_RESET_RESEND_TIMEOUT_MS); 1676 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_initialization_timeout_handler); 1677 btstack_run_loop_add_timer(&hci_stack->timeout); 1678 if ((hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_CAMBRIDGE_SILICON_RADIO) 1679 && hci_stack->config 1680 && hci_stack->chipset 1681 // && hci_stack->chipset->set_baudrate_command -- there's no such command 1682 && hci_stack->hci_transport->set_baudrate 1683 && hci_transport_uart_get_main_baud_rate()){ 1684 hci_stack->substate = HCI_INIT_W4_SEND_BAUD_CHANGE; 1685 } else { 1686 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT_LINK_RESET; 1687 } 1688 break; 1689 default: 1690 break; 1691 } 1692 1693 if (send_cmd){ 1694 int size = 3u + hci_stack->hci_packet_buffer[2u]; 1695 hci_stack->last_cmd_opcode = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 1696 hci_dump_packet(HCI_COMMAND_DATA_PACKET, 0, hci_stack->hci_packet_buffer, size); 1697 hci_stack->hci_transport->send_packet(HCI_COMMAND_DATA_PACKET, hci_stack->hci_packet_buffer, size); 1698 break; 1699 } 1700 log_info("Init script done"); 1701 1702 // Init script download on Broadcom chipsets causes: 1703 if ( (hci_stack->chipset_result != BTSTACK_CHIPSET_NO_INIT_SCRIPT) && 1704 ( (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION) 1705 || (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_EM_MICROELECTRONIC_MARIN_SA)) ){ 1706 1707 // - baud rate to reset, restore UART baud rate if needed 1708 if (need_baud_change) { 1709 uint32_t baud_rate = ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_init; 1710 log_info("Local baud rate change to %" PRIu32 " after init script (bcm)", baud_rate); 1711 hci_stack->hci_transport->set_baudrate(baud_rate); 1712 } 1713 1714 uint16_t bcm_delay_ms = 300; 1715 // - UART may or may not be disabled during update and Controller RTS may or may not be high during this time 1716 // -> Work around: wait here. 1717 log_info("BCM delay (%u ms) after init script", bcm_delay_ms); 1718 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT_BCM_DELAY; 1719 btstack_run_loop_set_timer(&hci_stack->timeout, bcm_delay_ms); 1720 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_initialization_timeout_handler); 1721 btstack_run_loop_add_timer(&hci_stack->timeout); 1722 break; 1723 } 1724 } 1725 #endif 1726 /* fall through */ 1727 1728 case HCI_INIT_READ_LOCAL_SUPPORTED_COMMANDS: 1729 hci_stack->substate = HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS; 1730 hci_send_cmd(&hci_read_local_supported_commands); 1731 break; 1732 case HCI_INIT_READ_BD_ADDR: 1733 hci_stack->substate = HCI_INIT_W4_READ_BD_ADDR; 1734 hci_send_cmd(&hci_read_bd_addr); 1735 break; 1736 case HCI_INIT_READ_BUFFER_SIZE: 1737 // only read buffer size if supported 1738 if (hci_command_supported(SUPPORTED_HCI_COMMAND_READ_BUFFER_SIZE)){ 1739 hci_stack->substate = HCI_INIT_W4_READ_BUFFER_SIZE; 1740 hci_send_cmd(&hci_read_buffer_size); 1741 break; 1742 } 1743 1744 /* fall through */ 1745 1746 case HCI_INIT_READ_LOCAL_SUPPORTED_FEATURES: 1747 hci_stack->substate = HCI_INIT_W4_READ_LOCAL_SUPPORTED_FEATURES; 1748 hci_send_cmd(&hci_read_local_supported_features); 1749 break; 1750 1751 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 1752 case HCI_INIT_SET_CONTROLLER_TO_HOST_FLOW_CONTROL: 1753 hci_stack->substate = HCI_INIT_W4_SET_CONTROLLER_TO_HOST_FLOW_CONTROL; 1754 hci_send_cmd(&hci_set_controller_to_host_flow_control, 3); // ACL + SCO Flow Control 1755 break; 1756 case HCI_INIT_HOST_BUFFER_SIZE: 1757 hci_stack->substate = HCI_INIT_W4_HOST_BUFFER_SIZE; 1758 hci_send_cmd(&hci_host_buffer_size, HCI_HOST_ACL_PACKET_LEN, HCI_HOST_SCO_PACKET_LEN, 1759 HCI_HOST_ACL_PACKET_NUM, HCI_HOST_SCO_PACKET_NUM); 1760 break; 1761 #endif 1762 1763 case HCI_INIT_SET_EVENT_MASK: 1764 hci_stack->substate = HCI_INIT_W4_SET_EVENT_MASK; 1765 if (hci_le_supported()){ 1766 hci_send_cmd(&hci_set_event_mask,0xFFFFFFFFU, 0x3FFFFFFFU); 1767 } else { 1768 // Kensington Bluetooth 2.1 USB Dongle (CSR Chipset) returns an error for 0xffff... 1769 hci_send_cmd(&hci_set_event_mask,0xFFFFFFFFU, 0x1FFFFFFFU); 1770 } 1771 break; 1772 1773 #ifdef ENABLE_CLASSIC 1774 case HCI_INIT_WRITE_SIMPLE_PAIRING_MODE: 1775 if (hci_classic_supported() && gap_ssp_supported()){ 1776 hci_stack->substate = HCI_INIT_W4_WRITE_SIMPLE_PAIRING_MODE; 1777 hci_send_cmd(&hci_write_simple_pairing_mode, hci_stack->ssp_enable); 1778 break; 1779 } 1780 1781 /* fall through */ 1782 1783 case HCI_INIT_WRITE_INQUIRY_MODE: 1784 if (hci_classic_supported()){ 1785 hci_stack->substate = HCI_INIT_W4_WRITE_INQUIRY_MODE; 1786 hci_send_cmd(&hci_write_inquiry_mode, (int) hci_stack->inquiry_mode); 1787 break; 1788 } 1789 1790 /* fall through */ 1791 1792 case HCI_INIT_WRITE_SECURE_CONNECTIONS_HOST_ENABLE: 1793 // skip write secure connections host support if not supported or disabled 1794 if (hci_classic_supported() && hci_stack->secure_connections_enable 1795 && hci_command_supported(SUPPORTED_HCI_COMMAND_WRITE_SECURE_CONNECTIONS_HOST)) { 1796 hci_stack->secure_connections_active = true; 1797 hci_stack->substate = HCI_INIT_W4_WRITE_SECURE_CONNECTIONS_HOST_ENABLE; 1798 hci_send_cmd(&hci_write_secure_connections_host_support, 1); 1799 break; 1800 } 1801 1802 #ifdef ENABLE_SCO_OVER_HCI 1803 /* fall through */ 1804 1805 // only sent if ENABLE_SCO_OVER_HCI is defined 1806 case HCI_INIT_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE: 1807 // skip write synchronous flow control if not supported 1808 if (hci_classic_supported() 1809 && hci_command_supported(SUPPORTED_HCI_COMMAND_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE)) { 1810 hci_stack->substate = HCI_INIT_W4_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE; 1811 hci_send_cmd(&hci_write_synchronous_flow_control_enable, 1); // SCO tracking enabled 1812 break; 1813 } 1814 /* fall through */ 1815 1816 case HCI_INIT_WRITE_DEFAULT_ERRONEOUS_DATA_REPORTING: 1817 // skip write default erroneous data reporting if not supported 1818 if (hci_classic_supported() 1819 && hci_command_supported(SUPPORTED_HCI_COMMAND_WRITE_DEFAULT_ERRONEOUS_DATA_REPORTING)) { 1820 hci_stack->substate = HCI_INIT_W4_WRITE_DEFAULT_ERRONEOUS_DATA_REPORTING; 1821 hci_send_cmd(&hci_write_default_erroneous_data_reporting, 1); 1822 break; 1823 } 1824 #endif 1825 1826 #if defined(ENABLE_SCO_OVER_HCI) || defined(ENABLE_SCO_OVER_PCM) 1827 /* fall through */ 1828 1829 // only sent if manufacturer is Broadcom and ENABLE_SCO_OVER_HCI or ENABLE_SCO_OVER_PCM is defined 1830 case HCI_INIT_BCM_WRITE_SCO_PCM_INT: 1831 if (hci_classic_supported() && (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION)){ 1832 hci_stack->substate = HCI_INIT_W4_BCM_WRITE_SCO_PCM_INT; 1833 #ifdef ENABLE_SCO_OVER_HCI 1834 log_info("BCM: Route SCO data via HCI transport"); 1835 hci_send_cmd(&hci_bcm_write_sco_pcm_int, 1, 0, 0, 0, 0); 1836 #endif 1837 #ifdef ENABLE_SCO_OVER_PCM 1838 log_info("BCM: Route SCO data via PCM interface"); 1839 #ifdef ENABLE_BCM_PCM_WBS 1840 // 512 kHz bit clock for 2 channels x 16 bit x 16 kHz 1841 hci_send_cmd(&hci_bcm_write_sco_pcm_int, 0, 2, 0, 1, 1); 1842 #else 1843 // 256 kHz bit clock for 2 channels x 16 bit x 8 kHz 1844 hci_send_cmd(&hci_bcm_write_sco_pcm_int, 0, 1, 0, 1, 1); 1845 #endif 1846 #endif 1847 break; 1848 } 1849 #endif 1850 1851 #ifdef ENABLE_SCO_OVER_PCM 1852 /* fall through */ 1853 1854 case HCI_INIT_BCM_WRITE_I2SPCM_INTERFACE_PARAM: 1855 if (hci_classic_supported() && (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION)){ 1856 hci_stack->substate = HCI_INIT_W4_BCM_WRITE_I2SPCM_INTERFACE_PARAM; 1857 log_info("BCM: Config PCM interface for I2S"); 1858 #ifdef ENABLE_BCM_PCM_WBS 1859 // 512 kHz bit clock for 2 channels x 16 bit x 8 kHz 1860 hci_send_cmd(&hci_bcm_write_i2spcm_interface_param, 1, 1, 0, 2); 1861 #else 1862 // 256 kHz bit clock for 2 channels x 16 bit x 8 kHz 1863 hci_send_cmd(&hci_bcm_write_i2spcm_interface_param, 1, 1, 0, 1); 1864 #endif 1865 break; 1866 } 1867 #endif 1868 #endif 1869 1870 #ifdef ENABLE_BLE 1871 /* fall through */ 1872 1873 // LE INIT 1874 case HCI_INIT_LE_READ_BUFFER_SIZE: 1875 if (hci_le_supported()){ 1876 hci_stack->substate = HCI_INIT_W4_LE_READ_BUFFER_SIZE; 1877 hci_send_cmd(&hci_le_read_buffer_size); 1878 break; 1879 } 1880 1881 /* fall through */ 1882 1883 case HCI_INIT_WRITE_LE_HOST_SUPPORTED: 1884 // skip write le host if not supported (e.g. on LE only EM9301) 1885 if (hci_le_supported() 1886 && hci_command_supported(SUPPORTED_HCI_COMMAND_WRITE_LE_HOST_SUPPORTED)) { 1887 // LE Supported Host = 1, Simultaneous Host = 0 1888 hci_stack->substate = HCI_INIT_W4_WRITE_LE_HOST_SUPPORTED; 1889 hci_send_cmd(&hci_write_le_host_supported, 1, 0); 1890 break; 1891 } 1892 1893 /* fall through */ 1894 1895 case HCI_INIT_LE_SET_EVENT_MASK: 1896 if (hci_le_supported()){ 1897 hci_stack->substate = HCI_INIT_W4_LE_SET_EVENT_MASK; 1898 hci_send_cmd(&hci_le_set_event_mask, 0xfffffdff, 0x07); // all events from core v5.3 without LE Enhanced Connection Complete 1899 break; 1900 } 1901 #endif 1902 1903 #ifdef ENABLE_LE_DATA_LENGTH_EXTENSION 1904 /* fall through */ 1905 1906 case HCI_INIT_LE_READ_MAX_DATA_LENGTH: 1907 if (hci_le_supported() 1908 && hci_command_supported(SUPPORTED_HCI_COMMAND_LE_READ_MAXIMUM_DATA_LENGTH)) { 1909 hci_stack->substate = HCI_INIT_W4_LE_READ_MAX_DATA_LENGTH; 1910 hci_send_cmd(&hci_le_read_maximum_data_length); 1911 break; 1912 } 1913 1914 /* fall through */ 1915 1916 case HCI_INIT_LE_WRITE_SUGGESTED_DATA_LENGTH: 1917 if (hci_le_supported() 1918 && hci_command_supported(SUPPORTED_HCI_COMMAND_LE_WRITE_SUGGESTED_DEFAULT_DATA_LENGTH)) { 1919 hci_stack->substate = HCI_INIT_W4_LE_WRITE_SUGGESTED_DATA_LENGTH; 1920 hci_send_cmd(&hci_le_write_suggested_default_data_length, hci_stack->le_supported_max_tx_octets, hci_stack->le_supported_max_tx_time); 1921 break; 1922 } 1923 #endif 1924 1925 #ifdef ENABLE_LE_CENTRAL 1926 /* fall through */ 1927 1928 case HCI_INIT_READ_WHITE_LIST_SIZE: 1929 if (hci_le_supported()){ 1930 hci_stack->substate = HCI_INIT_W4_READ_WHITE_LIST_SIZE; 1931 hci_send_cmd(&hci_le_read_white_list_size); 1932 break; 1933 } 1934 1935 #endif 1936 1937 #ifdef ENABLE_LE_PERIPHERAL 1938 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 1939 /* fall through */ 1940 1941 case HCI_INIT_LE_READ_MAX_ADV_DATA_LEN: 1942 if (hci_extended_advertising_supported()){ 1943 hci_stack->substate = HCI_INIT_W4_LE_READ_MAX_ADV_DATA_LEN; 1944 hci_send_cmd(&hci_le_read_maximum_advertising_data_length); 1945 break; 1946 } 1947 #endif 1948 #endif 1949 /* fall through */ 1950 1951 case HCI_INIT_DONE: 1952 hci_stack->substate = HCI_INIT_DONE; 1953 // main init sequence complete 1954 #ifdef ENABLE_CLASSIC 1955 // check if initial Classic GAP Tasks are completed 1956 if (hci_classic_supported() && (hci_stack->gap_tasks_classic != 0)) { 1957 hci_run_gap_tasks_classic(); 1958 break; 1959 } 1960 #endif 1961 #ifdef ENABLE_BLE 1962 #ifdef ENABLE_LE_CENTRAL 1963 // check if initial LE GAP Tasks are completed 1964 if (hci_le_supported() && hci_stack->le_scanning_param_update) { 1965 hci_run_general_gap_le(); 1966 break; 1967 } 1968 #endif 1969 #endif 1970 hci_init_done(); 1971 break; 1972 1973 default: 1974 return; 1975 } 1976 } 1977 1978 static bool hci_initializing_event_handler_command_completed(const uint8_t * packet){ 1979 bool command_completed = false; 1980 if (hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_COMPLETE){ 1981 uint16_t opcode = little_endian_read_16(packet,3); 1982 if (opcode == hci_stack->last_cmd_opcode){ 1983 command_completed = true; 1984 log_debug("Command complete for expected opcode %04x at substate %u", opcode, hci_stack->substate); 1985 } else { 1986 log_info("Command complete for different opcode %04x, expected %04x, at substate %u", opcode, hci_stack->last_cmd_opcode, hci_stack->substate); 1987 } 1988 } 1989 1990 if (hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_STATUS){ 1991 uint8_t status = packet[2]; 1992 uint16_t opcode = little_endian_read_16(packet,4); 1993 if (opcode == hci_stack->last_cmd_opcode){ 1994 if (status){ 1995 command_completed = true; 1996 log_debug("Command status error 0x%02x for expected opcode %04x at substate %u", status, opcode, hci_stack->substate); 1997 } else { 1998 log_info("Command status OK for expected opcode %04x, waiting for command complete", opcode); 1999 } 2000 } else { 2001 log_debug("Command status for opcode %04x, expected %04x", opcode, hci_stack->last_cmd_opcode); 2002 } 2003 } 2004 #ifndef HAVE_HOST_CONTROLLER_API 2005 // Vendor == CSR 2006 if ((hci_stack->substate == HCI_INIT_W4_CUSTOM_INIT) && (hci_event_packet_get_type(packet) == HCI_EVENT_VENDOR_SPECIFIC)){ 2007 // TODO: track actual command 2008 command_completed = true; 2009 } 2010 2011 // Vendor == Toshiba 2012 if ((hci_stack->substate == HCI_INIT_W4_SEND_BAUD_CHANGE) && (hci_event_packet_get_type(packet) == HCI_EVENT_VENDOR_SPECIFIC)){ 2013 // TODO: track actual command 2014 command_completed = true; 2015 // Fix: no HCI Command Complete received, so num_cmd_packets not reset 2016 hci_stack->num_cmd_packets = 1; 2017 } 2018 #endif 2019 2020 return command_completed; 2021 } 2022 2023 static void hci_initializing_event_handler(const uint8_t * packet, uint16_t size){ 2024 2025 UNUSED(size); // ok: less than 6 bytes are read from our buffer 2026 2027 bool command_completed = hci_initializing_event_handler_command_completed(packet); 2028 2029 #ifndef HAVE_HOST_CONTROLLER_API 2030 2031 // Late response (> 100 ms) for HCI Reset e.g. on Toshiba TC35661: 2032 // Command complete for HCI Reset arrives after we've resent the HCI Reset command 2033 // 2034 // HCI Reset 2035 // Timeout 100 ms 2036 // HCI Reset 2037 // Command Complete Reset 2038 // HCI Read Local Version Information 2039 // Command Complete Reset - but we expected Command Complete Read Local Version Information 2040 // hang... 2041 // 2042 // Fix: Command Complete for HCI Reset in HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION trigger resend 2043 if (!command_completed 2044 && (hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_COMPLETE) 2045 && (hci_stack->substate == HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION)){ 2046 2047 uint16_t opcode = little_endian_read_16(packet,3); 2048 if (opcode == hci_reset.opcode){ 2049 hci_stack->substate = HCI_INIT_SEND_READ_LOCAL_VERSION_INFORMATION; 2050 return; 2051 } 2052 } 2053 2054 // CSR & H5 2055 // Fix: Command Complete for HCI Reset in HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION trigger resend 2056 if (!command_completed 2057 && (hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_COMPLETE) 2058 && (hci_stack->substate == HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS)){ 2059 2060 uint16_t opcode = little_endian_read_16(packet,3); 2061 if (opcode == hci_reset.opcode){ 2062 hci_stack->substate = HCI_INIT_READ_LOCAL_SUPPORTED_COMMANDS; 2063 return; 2064 } 2065 } 2066 2067 // on CSR with BCSP/H5, the reset resend timeout leads to substate == HCI_INIT_SEND_RESET or HCI_INIT_SEND_RESET_CSR_WARM_BOOT 2068 // fix: Correct substate and behave as command below 2069 if (command_completed){ 2070 switch (hci_stack->substate){ 2071 case HCI_INIT_SEND_RESET: 2072 hci_stack->substate = HCI_INIT_W4_SEND_RESET; 2073 break; 2074 case HCI_INIT_SEND_RESET_CSR_WARM_BOOT: 2075 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT; 2076 break; 2077 default: 2078 break; 2079 } 2080 } 2081 2082 #endif 2083 2084 if (!command_completed) return; 2085 2086 bool need_baud_change = false; 2087 bool need_addr_change = false; 2088 2089 #ifndef HAVE_HOST_CONTROLLER_API 2090 need_baud_change = hci_stack->config 2091 && hci_stack->chipset 2092 && hci_stack->chipset->set_baudrate_command 2093 && hci_stack->hci_transport->set_baudrate 2094 && ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_main; 2095 2096 need_addr_change = hci_stack->custom_bd_addr_set 2097 && hci_stack->chipset 2098 && hci_stack->chipset->set_bd_addr_command; 2099 #endif 2100 2101 switch(hci_stack->substate){ 2102 2103 #ifndef HAVE_HOST_CONTROLLER_API 2104 case HCI_INIT_SEND_RESET: 2105 // on CSR with BCSP/H5, resend triggers resend of HCI Reset and leads to substate == HCI_INIT_SEND_RESET 2106 // fix: just correct substate and behave as command below 2107 2108 /* fall through */ 2109 #endif 2110 2111 case HCI_INIT_W4_SEND_RESET: 2112 btstack_run_loop_remove_timer(&hci_stack->timeout); 2113 hci_stack->substate = HCI_INIT_SEND_READ_LOCAL_VERSION_INFORMATION; 2114 return; 2115 2116 #ifndef HAVE_HOST_CONTROLLER_API 2117 case HCI_INIT_W4_SEND_BAUD_CHANGE: 2118 // for STLC2500D, baud rate change already happened. 2119 // for others, baud rate gets changed now 2120 if ((hci_stack->manufacturer != BLUETOOTH_COMPANY_ID_ST_MICROELECTRONICS) && need_baud_change){ 2121 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 2122 log_info("Local baud rate change to %" PRIu32 "(w4_send_baud_change)", baud_rate); 2123 hci_stack->hci_transport->set_baudrate(baud_rate); 2124 } 2125 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 2126 return; 2127 case HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT: 2128 btstack_run_loop_remove_timer(&hci_stack->timeout); 2129 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 2130 return; 2131 case HCI_INIT_W4_CUSTOM_INIT: 2132 // repeat custom init 2133 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 2134 return; 2135 #endif 2136 2137 case HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS: 2138 if (need_baud_change && (hci_stack->chipset_result != BTSTACK_CHIPSET_NO_INIT_SCRIPT) && 2139 ((hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION) || 2140 (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_EM_MICROELECTRONIC_MARIN_SA))) { 2141 hci_stack->substate = HCI_INIT_SEND_BAUD_CHANGE_BCM; 2142 return; 2143 } 2144 if (need_addr_change){ 2145 hci_stack->substate = HCI_INIT_SET_BD_ADDR; 2146 return; 2147 } 2148 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 2149 return; 2150 #ifndef HAVE_HOST_CONTROLLER_API 2151 case HCI_INIT_W4_SEND_BAUD_CHANGE_BCM: 2152 if (need_baud_change){ 2153 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 2154 log_info("Local baud rate change to %" PRIu32 "(w4_send_baud_change_bcm))", baud_rate); 2155 hci_stack->hci_transport->set_baudrate(baud_rate); 2156 } 2157 if (need_addr_change){ 2158 hci_stack->substate = HCI_INIT_SET_BD_ADDR; 2159 return; 2160 } 2161 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 2162 return; 2163 case HCI_INIT_W4_SET_BD_ADDR: 2164 // for STLC2500D + ATWILC3000, bd addr change only gets active after sending reset command 2165 if ((hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_ST_MICROELECTRONICS) 2166 || (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_ATMEL_CORPORATION)){ 2167 hci_stack->substate = HCI_INIT_SEND_RESET_ST_WARM_BOOT; 2168 return; 2169 } 2170 // skipping st warm boot 2171 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 2172 return; 2173 case HCI_INIT_W4_SEND_RESET_ST_WARM_BOOT: 2174 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 2175 return; 2176 #endif 2177 2178 case HCI_INIT_DONE: 2179 // set state if we came here by fall through 2180 hci_stack->substate = HCI_INIT_DONE; 2181 return; 2182 2183 default: 2184 break; 2185 } 2186 hci_initializing_next_state(); 2187 } 2188 2189 static void hci_handle_connection_failed(hci_connection_t * conn, uint8_t status){ 2190 // CC2564C might emit Connection Complete for rejected incoming SCO connection 2191 // To prevent accidentally free'ing the CHI connection for the ACL connection, 2192 // check if the hci connection has been outgoing 2193 switch (conn->state){ 2194 case SEND_CREATE_CONNECTION: 2195 case RECEIVED_CONNECTION_REQUEST: 2196 break; 2197 default: 2198 return; 2199 } 2200 2201 log_info("Outgoing connection to %s failed", bd_addr_to_str(conn->address)); 2202 bd_addr_t bd_address; 2203 (void)memcpy(&bd_address, conn->address, 6); 2204 2205 #ifdef ENABLE_CLASSIC 2206 // cache needed data 2207 int notify_dedicated_bonding_failed = conn->bonding_flags & BONDING_DEDICATED; 2208 #endif 2209 2210 // connection failed, remove entry 2211 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 2212 btstack_memory_hci_connection_free( conn ); 2213 2214 #ifdef ENABLE_CLASSIC 2215 // notify client if dedicated bonding 2216 if (notify_dedicated_bonding_failed){ 2217 log_info("hci notify_dedicated_bonding_failed"); 2218 hci_emit_dedicated_bonding_result(bd_address, status); 2219 } 2220 2221 // if authentication error, also delete link key 2222 if (status == ERROR_CODE_AUTHENTICATION_FAILURE) { 2223 gap_drop_link_key_for_bd_addr(bd_address); 2224 } 2225 #else 2226 UNUSED(status); 2227 #endif 2228 } 2229 2230 #ifdef ENABLE_CLASSIC 2231 static void hci_handle_remote_features_page_0(hci_connection_t * conn, const uint8_t * features){ 2232 // SSP Controller 2233 if (features[6] & (1 << 3)){ 2234 conn->bonding_flags |= BONDING_REMOTE_SUPPORTS_SSP_CONTROLLER; 2235 } 2236 // eSCO 2237 if (features[3] & (1<<7)){ 2238 conn->remote_supported_features[0] |= 1; 2239 } 2240 // Extended features 2241 if (features[7] & (1<<7)){ 2242 conn->remote_supported_features[0] |= 2; 2243 } 2244 } 2245 2246 static void hci_handle_remote_features_page_1(hci_connection_t * conn, const uint8_t * features){ 2247 // SSP Host 2248 if (features[0] & (1 << 0)){ 2249 conn->bonding_flags |= BONDING_REMOTE_SUPPORTS_SSP_HOST; 2250 } 2251 // SC Host 2252 if (features[0] & (1 << 3)){ 2253 conn->bonding_flags |= BONDING_REMOTE_SUPPORTS_SC_HOST; 2254 } 2255 } 2256 2257 static void hci_handle_remote_features_page_2(hci_connection_t * conn, const uint8_t * features){ 2258 // SC Controller 2259 if (features[1] & (1 << 0)){ 2260 conn->bonding_flags |= BONDING_REMOTE_SUPPORTS_SC_CONTROLLER; 2261 } 2262 } 2263 2264 static void hci_handle_remote_features_received(hci_connection_t * conn){ 2265 conn->bonding_flags &= ~BONDING_REMOTE_FEATURES_QUERY_ACTIVE; 2266 conn->bonding_flags |= BONDING_RECEIVED_REMOTE_FEATURES; 2267 log_info("Remote features %02x, bonding flags %x", conn->remote_supported_features[0], conn->bonding_flags); 2268 if (conn->bonding_flags & BONDING_DEDICATED){ 2269 conn->bonding_flags |= BONDING_SEND_AUTHENTICATE_REQUEST; 2270 } 2271 } 2272 static bool hci_remote_sc_enabled(hci_connection_t * connection){ 2273 const uint16_t sc_enabled_mask = BONDING_REMOTE_SUPPORTS_SC_HOST | BONDING_REMOTE_SUPPORTS_SC_CONTROLLER; 2274 return (connection->bonding_flags & sc_enabled_mask) == sc_enabled_mask; 2275 } 2276 2277 #endif 2278 2279 static void handle_event_for_current_stack_state(const uint8_t * packet, uint16_t size) { 2280 // handle BT initialization 2281 if (hci_stack->state == HCI_STATE_INITIALIZING) { 2282 hci_initializing_event_handler(packet, size); 2283 } 2284 2285 // help with BT sleep 2286 if ((hci_stack->state == HCI_STATE_FALLING_ASLEEP) 2287 && (hci_stack->substate == HCI_FALLING_ASLEEP_W4_WRITE_SCAN_ENABLE) 2288 && (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_write_scan_enable))) { 2289 hci_initializing_next_state(); 2290 } 2291 } 2292 2293 #ifdef ENABLE_CLASSIC 2294 static void hci_handle_read_encryption_key_size_complete(hci_connection_t * conn, uint8_t encryption_key_size) { 2295 conn->authentication_flags |= AUTH_FLAG_CONNECTION_ENCRYPTED; 2296 conn->encryption_key_size = encryption_key_size; 2297 2298 if ((conn->authentication_flags & AUTH_FLAG_CONNECTION_AUTHENTICATED) != 0) { 2299 conn->requested_security_level = LEVEL_0; 2300 hci_emit_security_level(conn->con_handle, gap_security_level_for_connection(conn)); 2301 return; 2302 } 2303 2304 // Request remote features if not already done 2305 hci_trigger_remote_features_for_connection(conn); 2306 2307 // Request Authentication if not already done 2308 if ((conn->bonding_flags & BONDING_SENT_AUTHENTICATE_REQUEST) != 0) return; 2309 conn->bonding_flags |= BONDING_SEND_AUTHENTICATE_REQUEST; 2310 } 2311 #endif 2312 2313 static void hci_store_local_supported_commands(const uint8_t * packet){ 2314 // create mapping table 2315 #define X(name, offset, bit) { offset, bit }, 2316 static struct { 2317 uint8_t byte_offset; 2318 uint8_t bit_position; 2319 } supported_hci_commands_map [] = { 2320 SUPPORTED_HCI_COMMANDS 2321 }; 2322 #undef X 2323 2324 // create names for debug purposes 2325 #ifdef ENABLE_LOG_DEBUG 2326 #define X(name, offset, bit) #name, 2327 static const char * command_names[] = { 2328 SUPPORTED_HCI_COMMANDS 2329 }; 2330 #undef X 2331 #endif 2332 2333 hci_stack->local_supported_commands = 0; 2334 const uint8_t * commands_map = &packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1]; 2335 uint16_t i; 2336 for (i = 0 ; i < SUPPORTED_HCI_COMMANDS_COUNT ; i++){ 2337 if ((commands_map[supported_hci_commands_map[i].byte_offset] & (1 << supported_hci_commands_map[i].bit_position)) != 0){ 2338 #ifdef ENABLE_LOG_DEBUG 2339 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); 2340 #else 2341 log_info("Command 0x%02x supported %u/%u", i, supported_hci_commands_map[i].byte_offset, supported_hci_commands_map[i].bit_position); 2342 #endif 2343 hci_stack->local_supported_commands |= (1LU << i); 2344 } 2345 } 2346 log_info("Local supported commands summary %04x", hci_stack->local_supported_commands); 2347 } 2348 2349 static void handle_command_complete_event(uint8_t * packet, uint16_t size){ 2350 UNUSED(size); 2351 2352 uint16_t manufacturer; 2353 #ifdef ENABLE_CLASSIC 2354 hci_con_handle_t handle; 2355 hci_connection_t * conn; 2356 uint8_t status; 2357 #endif 2358 // get num cmd packets - limit to 1 to reduce complexity 2359 hci_stack->num_cmd_packets = packet[2] ? 1 : 0; 2360 2361 uint16_t opcode = hci_event_command_complete_get_command_opcode(packet); 2362 switch (opcode){ 2363 case HCI_OPCODE_HCI_READ_LOCAL_NAME: 2364 if (packet[5]) break; 2365 // terminate, name 248 chars 2366 packet[6+248] = 0; 2367 log_info("local name: %s", &packet[6]); 2368 break; 2369 case HCI_OPCODE_HCI_READ_BUFFER_SIZE: 2370 // "The HC_ACL_Data_Packet_Length return parameter will be used to determine the size of the L2CAP segments contained in ACL Data Packets" 2371 if (hci_stack->state == HCI_STATE_INITIALIZING) { 2372 uint16_t acl_len = little_endian_read_16(packet, 6); 2373 uint16_t sco_len = packet[8]; 2374 2375 // determine usable ACL/SCO payload size 2376 hci_stack->acl_data_packet_length = btstack_min(acl_len, HCI_ACL_PAYLOAD_SIZE); 2377 hci_stack->sco_data_packet_length = btstack_min(sco_len, HCI_ACL_PAYLOAD_SIZE); 2378 2379 hci_stack->acl_packets_total_num = little_endian_read_16(packet, 9); 2380 hci_stack->sco_packets_total_num = little_endian_read_16(packet, 11); 2381 2382 log_info("hci_read_buffer_size: ACL size module %u -> used %u, count %u / SCO size %u, count %u", 2383 acl_len, hci_stack->acl_data_packet_length, hci_stack->acl_packets_total_num, 2384 hci_stack->sco_data_packet_length, hci_stack->sco_packets_total_num); 2385 } 2386 break; 2387 case HCI_OPCODE_HCI_READ_RSSI: 2388 if (packet[5] == ERROR_CODE_SUCCESS){ 2389 uint8_t event[5]; 2390 event[0] = GAP_EVENT_RSSI_MEASUREMENT; 2391 event[1] = 3; 2392 (void)memcpy(&event[2], &packet[6], 3); 2393 hci_emit_event(event, sizeof(event), 1); 2394 } 2395 break; 2396 #ifdef ENABLE_BLE 2397 case HCI_OPCODE_HCI_LE_READ_BUFFER_SIZE: 2398 hci_stack->le_data_packets_length = little_endian_read_16(packet, 6); 2399 hci_stack->le_acl_packets_total_num = packet[8]; 2400 // determine usable ACL payload size 2401 if (HCI_ACL_PAYLOAD_SIZE < hci_stack->le_data_packets_length){ 2402 hci_stack->le_data_packets_length = HCI_ACL_PAYLOAD_SIZE; 2403 } 2404 log_info("hci_le_read_buffer_size: size %u, count %u", hci_stack->le_data_packets_length, hci_stack->le_acl_packets_total_num); 2405 break; 2406 #endif 2407 #ifdef ENABLE_LE_DATA_LENGTH_EXTENSION 2408 case HCI_OPCODE_HCI_LE_READ_MAXIMUM_DATA_LENGTH: 2409 hci_stack->le_supported_max_tx_octets = little_endian_read_16(packet, 6); 2410 hci_stack->le_supported_max_tx_time = little_endian_read_16(packet, 8); 2411 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); 2412 break; 2413 #endif 2414 #ifdef ENABLE_LE_CENTRAL 2415 case HCI_OPCODE_HCI_LE_READ_WHITE_LIST_SIZE: 2416 hci_stack->le_whitelist_capacity = packet[6]; 2417 log_info("hci_le_read_white_list_size: size %u", hci_stack->le_whitelist_capacity); 2418 break; 2419 #endif 2420 #ifdef ENABLE_LE_PERIPHERAL 2421 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 2422 case HCI_OPCODE_HCI_LE_READ_MAXIMUM_ADVERTISING_DATA_LENGTH: 2423 hci_stack->le_maximum_advertising_data_length = little_endian_read_16(packet, 6); 2424 break; 2425 case HCI_OPCODE_HCI_LE_SET_EXTENDED_ADVERTISING_PARAMETERS: 2426 if (hci_stack->le_advertising_set_in_current_command != 0) { 2427 le_advertising_set_t * advertising_set = hci_advertising_set_for_handle(hci_stack->le_advertising_set_in_current_command); 2428 hci_stack->le_advertising_set_in_current_command = 0; 2429 if (advertising_set == NULL) break; 2430 uint8_t adv_status = packet[6]; 2431 uint8_t tx_power = packet[7]; 2432 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 }; 2433 if (adv_status == 0){ 2434 advertising_set->state |= LE_ADVERTISEMENT_STATE_PARAMS_SET; 2435 } 2436 hci_emit_event(event, sizeof(event), 1); 2437 } 2438 break; 2439 case HCI_OPCODE_HCI_LE_REMOVE_ADVERTISING_SET: 2440 if (hci_stack->le_advertising_set_in_current_command != 0) { 2441 le_advertising_set_t * advertising_set = hci_advertising_set_for_handle(hci_stack->le_advertising_set_in_current_command); 2442 hci_stack->le_advertising_set_in_current_command = 0; 2443 if (advertising_set == NULL) break; 2444 uint8_t adv_status = packet[5]; 2445 uint8_t event[] = { HCI_EVENT_META_GAP, 3, GAP_SUBEVENT_ADVERTISING_SET_REMOVED, hci_stack->le_advertising_set_in_current_command, adv_status }; 2446 if (adv_status == 0){ 2447 btstack_linked_list_remove(&hci_stack->le_advertising_sets, (btstack_linked_item_t *) advertising_set); 2448 } 2449 hci_emit_event(event, sizeof(event), 1); 2450 } 2451 break; 2452 #endif 2453 #endif 2454 case HCI_OPCODE_HCI_READ_BD_ADDR: 2455 reverse_bd_addr(&packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE + 1], hci_stack->local_bd_addr); 2456 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)); 2457 #ifdef ENABLE_CLASSIC 2458 if (hci_stack->link_key_db){ 2459 hci_stack->link_key_db->set_local_bd_addr(hci_stack->local_bd_addr); 2460 } 2461 #endif 2462 break; 2463 #ifdef ENABLE_CLASSIC 2464 case HCI_OPCODE_HCI_WRITE_SCAN_ENABLE: 2465 hci_emit_discoverable_enabled(hci_stack->discoverable); 2466 break; 2467 case HCI_OPCODE_HCI_INQUIRY_CANCEL: 2468 if (hci_stack->inquiry_state == GAP_INQUIRY_STATE_W4_CANCELLED){ 2469 hci_stack->inquiry_state = GAP_INQUIRY_STATE_IDLE; 2470 uint8_t event[] = { GAP_EVENT_INQUIRY_COMPLETE, 1, 0}; 2471 hci_emit_event(event, sizeof(event), 1); 2472 } 2473 break; 2474 #endif 2475 case HCI_OPCODE_HCI_READ_LOCAL_SUPPORTED_FEATURES: 2476 (void)memcpy(hci_stack->local_supported_features, &packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE + 1], 8); 2477 2478 #ifdef ENABLE_CLASSIC 2479 // determine usable ACL packet types based on host buffer size and supported features 2480 hci_stack->packet_types = hci_acl_packet_types_for_buffer_size_and_local_features(HCI_ACL_PAYLOAD_SIZE, &hci_stack->local_supported_features[0]); 2481 log_info("Packet types %04x, eSCO %u", hci_stack->packet_types, hci_extended_sco_link_supported()); 2482 #endif 2483 // Classic/LE 2484 log_info("BR/EDR support %u, LE support %u", hci_classic_supported(), hci_le_supported()); 2485 break; 2486 case HCI_OPCODE_HCI_READ_LOCAL_VERSION_INFORMATION: 2487 manufacturer = little_endian_read_16(packet, 10); 2488 // map Cypress to Broadcom 2489 if (manufacturer == BLUETOOTH_COMPANY_ID_CYPRESS_SEMICONDUCTOR){ 2490 log_info("Treat Cypress as Broadcom"); 2491 manufacturer = BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION; 2492 little_endian_store_16(packet, 10, manufacturer); 2493 } 2494 hci_stack->manufacturer = manufacturer; 2495 log_info("Manufacturer: 0x%04x", hci_stack->manufacturer); 2496 break; 2497 case HCI_OPCODE_HCI_READ_LOCAL_SUPPORTED_COMMANDS: 2498 hci_store_local_supported_commands(packet); 2499 break; 2500 #ifdef ENABLE_CLASSIC 2501 case HCI_OPCODE_HCI_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE: 2502 if (packet[5]) return; 2503 hci_stack->synchronous_flow_control_enabled = 1; 2504 break; 2505 case HCI_OPCODE_HCI_READ_ENCRYPTION_KEY_SIZE: 2506 status = packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE]; 2507 handle = little_endian_read_16(packet, OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1); 2508 conn = hci_connection_for_handle(handle); 2509 if (conn != NULL) { 2510 uint8_t key_size = 0; 2511 if (status == 0){ 2512 key_size = packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+3]; 2513 log_info("Handle %04x key Size: %u", handle, key_size); 2514 } else { 2515 key_size = 1; 2516 log_info("Read Encryption Key Size failed 0x%02x-> assuming insecure connection with key size of 1", status); 2517 } 2518 hci_handle_read_encryption_key_size_complete(conn, key_size); 2519 } 2520 break; 2521 // assert pairing complete event is emitted. 2522 // note: for SSP, Simple Pairing Complete Event is sufficient, but we want to be more robust 2523 case HCI_OPCODE_HCI_PIN_CODE_REQUEST_NEGATIVE_REPLY: 2524 case HCI_OPCODE_HCI_USER_PASSKEY_REQUEST_NEGATIVE_REPLY: 2525 case HCI_OPCODE_HCI_USER_CONFIRMATION_REQUEST_NEGATIVE_REPLY: 2526 hci_stack->gap_pairing_state = GAP_PAIRING_STATE_IDLE; 2527 // lookup connection by gap pairing addr 2528 conn = hci_connection_for_bd_addr_and_type(hci_stack->gap_pairing_addr, BD_ADDR_TYPE_ACL); 2529 if (conn == NULL) break; 2530 hci_pairing_complete(conn, ERROR_CODE_AUTHENTICATION_FAILURE); 2531 break; 2532 2533 #ifdef ENABLE_CLASSIC_PAIRING_OOB 2534 case HCI_OPCODE_HCI_READ_LOCAL_OOB_DATA: 2535 case HCI_OPCODE_HCI_READ_LOCAL_EXTENDED_OOB_DATA:{ 2536 uint8_t event[67]; 2537 event[0] = GAP_EVENT_LOCAL_OOB_DATA; 2538 event[1] = 65; 2539 (void)memset(&event[2], 0, 65); 2540 if (packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE] == ERROR_CODE_SUCCESS){ 2541 (void)memcpy(&event[3], &packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1], 32); 2542 if (opcode == HCI_OPCODE_HCI_READ_LOCAL_EXTENDED_OOB_DATA){ 2543 event[2] = 3; 2544 (void)memcpy(&event[35], &packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+33], 32); 2545 } else { 2546 event[2] = 1; 2547 } 2548 } 2549 hci_emit_event(event, sizeof(event), 0); 2550 break; 2551 } 2552 2553 // note: only needed if user does not provide OOB data 2554 case HCI_OPCODE_HCI_REMOTE_OOB_DATA_REQUEST_NEGATIVE_REPLY: 2555 conn = hci_connection_for_handle(hci_stack->classic_oob_con_handle); 2556 hci_stack->classic_oob_con_handle = HCI_CON_HANDLE_INVALID; 2557 if (conn == NULL) break; 2558 hci_pairing_complete(conn, ERROR_CODE_AUTHENTICATION_FAILURE); 2559 break; 2560 #endif 2561 #endif 2562 default: 2563 break; 2564 } 2565 } 2566 2567 #ifdef ENABLE_BLE 2568 static void event_handle_le_connection_complete(const uint8_t * packet){ 2569 bd_addr_t addr; 2570 bd_addr_type_t addr_type; 2571 hci_connection_t * conn; 2572 2573 // Connection management 2574 reverse_bd_addr(&packet[8], addr); 2575 addr_type = (bd_addr_type_t)packet[7]; 2576 log_info("LE Connection_complete (status=%u) type %u, %s", packet[3], addr_type, bd_addr_to_str(addr)); 2577 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 2578 2579 #ifdef ENABLE_LE_CENTRAL 2580 // handle error: error is reported only to the initiator -> outgoing connection 2581 if (packet[3]){ 2582 2583 // handle cancelled outgoing connection 2584 // "If the cancellation was successful then, after the Command Complete event for the LE_Create_Connection_Cancel command, 2585 // either an LE Connection Complete or an LE Enhanced Connection Complete event shall be generated. 2586 // In either case, the event shall be sent with the error code Unknown Connection Identifier (0x02)." 2587 if (packet[3] == ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER){ 2588 // reset state 2589 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 2590 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 2591 // get outgoing connection conn struct for direct connect 2592 conn = gap_get_outgoing_connection(); 2593 } 2594 2595 // outgoing le connection establishment is done 2596 if (conn){ 2597 // remove entry 2598 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 2599 btstack_memory_hci_connection_free( conn ); 2600 } 2601 return; 2602 } 2603 #endif 2604 2605 // on success, both hosts receive connection complete event 2606 if (packet[6] == HCI_ROLE_MASTER){ 2607 #ifdef ENABLE_LE_CENTRAL 2608 // if we're master on an le connection, it was an outgoing connection and we're done with it 2609 // note: no hci_connection_t object exists yet for connect with whitelist 2610 if (hci_is_le_connection_type(addr_type)){ 2611 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 2612 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 2613 } 2614 #endif 2615 } else { 2616 #ifdef ENABLE_LE_PERIPHERAL 2617 // if we're slave, it was an incoming connection, advertisements have stopped 2618 hci_stack->le_advertisements_state &= ~LE_ADVERTISEMENT_STATE_ACTIVE; 2619 #endif 2620 } 2621 2622 // LE connections are auto-accepted, so just create a connection if there isn't one already 2623 if (!conn){ 2624 conn = create_connection_for_bd_addr_and_type(addr, addr_type); 2625 } 2626 2627 // no memory, sorry. 2628 if (!conn){ 2629 return; 2630 } 2631 2632 conn->state = OPEN; 2633 conn->role = packet[6]; 2634 conn->con_handle = hci_subevent_le_connection_complete_get_connection_handle(packet); 2635 conn->le_connection_interval = hci_subevent_le_connection_complete_get_conn_interval(packet); 2636 2637 #ifdef ENABLE_LE_PERIPHERAL 2638 if (packet[6] == HCI_ROLE_SLAVE){ 2639 hci_update_advertisements_enabled_for_current_roles(); 2640 } 2641 #endif 2642 2643 // init unenhanced att bearer mtu 2644 conn->att_connection.mtu = ATT_DEFAULT_MTU; 2645 conn->att_connection.mtu_exchanged = false; 2646 2647 // TODO: store - role, peer address type, conn_interval, conn_latency, supervision timeout, master clock 2648 2649 // restart timer 2650 // btstack_run_loop_set_timer(&conn->timeout, HCI_CONNECTION_TIMEOUT_MS); 2651 // btstack_run_loop_add_timer(&conn->timeout); 2652 2653 log_info("New connection: handle %u, %s", conn->con_handle, bd_addr_to_str(conn->address)); 2654 2655 hci_emit_nr_connections_changed(); 2656 } 2657 #endif 2658 2659 #ifdef ENABLE_CLASSIC 2660 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){ 2661 if (io_cap_local == SSP_IO_CAPABILITY_UNKNOWN) return false; 2662 // LEVEL_4 is tested by l2cap 2663 // LEVEL 3 requires MITM protection -> check io capabilities if Authenticated is possible 2664 // @see: Core Spec v5.3, Vol 3, Part C, Table 5.7 2665 if (level >= LEVEL_3){ 2666 // MITM not possible without keyboard or display 2667 if (io_cap_remote >= SSP_IO_CAPABILITY_NO_INPUT_NO_OUTPUT) return false; 2668 if (io_cap_local >= SSP_IO_CAPABILITY_NO_INPUT_NO_OUTPUT) return false; 2669 2670 // MITM possible if one side has keyboard and the other has keyboard or display 2671 if (io_cap_remote == SSP_IO_CAPABILITY_KEYBOARD_ONLY) return true; 2672 if (io_cap_local == SSP_IO_CAPABILITY_KEYBOARD_ONLY) return true; 2673 2674 // MITM not possible if one side has only display and other side has no keyboard 2675 if (io_cap_remote == SSP_IO_CAPABILITY_DISPLAY_ONLY) return false; 2676 if (io_cap_local == SSP_IO_CAPABILITY_DISPLAY_ONLY) return false; 2677 } 2678 // LEVEL 2 requires SSP, which is a given 2679 return true; 2680 } 2681 2682 static bool btstack_is_null(uint8_t * data, uint16_t size){ 2683 uint16_t i; 2684 for (i=0; i < size ; i++){ 2685 if (data[i] != 0) { 2686 return false; 2687 } 2688 } 2689 return true; 2690 } 2691 2692 static void hci_ssp_assess_security_on_io_cap_request(hci_connection_t * conn){ 2693 // get requested security level 2694 gap_security_level_t requested_security_level = conn->requested_security_level; 2695 if (hci_stack->gap_secure_connections_only_mode){ 2696 requested_security_level = LEVEL_4; 2697 } 2698 2699 // assess security: LEVEL 4 requires SC 2700 // skip this preliminary test if remote features are not available yet to work around potential issue in ESP32 controller 2701 if ((requested_security_level == LEVEL_4) && 2702 ((conn->bonding_flags & BONDING_RECEIVED_REMOTE_FEATURES) != 0) && 2703 !hci_remote_sc_enabled(conn)){ 2704 log_info("Level 4 required, but SC not supported -> abort"); 2705 hci_pairing_complete(conn, ERROR_CODE_INSUFFICIENT_SECURITY); 2706 connectionSetAuthenticationFlags(conn, AUTH_FLAG_SEND_IO_CAPABILITIES_NEGATIVE_REPLY); 2707 return; 2708 } 2709 2710 // assess security based on io capabilities 2711 if (conn->authentication_flags & AUTH_FLAG_RECV_IO_CAPABILITIES_RESPONSE){ 2712 // responder: fully validate io caps of both sides as well as OOB data 2713 bool security_possible = false; 2714 security_possible = hci_ssp_security_level_possible_for_io_cap(requested_security_level, hci_stack->ssp_io_capability, conn->io_cap_response_io); 2715 2716 #ifdef ENABLE_CLASSIC_PAIRING_OOB 2717 // We assume that both Controller can reach LEVEL 4, if one side has received P-192 and the other has received P-256, 2718 // so we merge the OOB data availability 2719 uint8_t have_oob_data = conn->io_cap_response_oob_data; 2720 if (conn->classic_oob_c_192 != NULL){ 2721 have_oob_data |= 1; 2722 } 2723 if (conn->classic_oob_c_256 != NULL){ 2724 have_oob_data |= 2; 2725 } 2726 // for up to Level 3, either P-192 as well as P-256 will do 2727 // 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 2728 // if remote does not SC, we should not receive P-256 data either 2729 if ((requested_security_level <= LEVEL_3) && (have_oob_data != 0)){ 2730 security_possible = true; 2731 } 2732 // for Level 4, P-256 is needed 2733 if ((requested_security_level == LEVEL_4 && ((have_oob_data & 2) != 0))){ 2734 security_possible = true; 2735 } 2736 #endif 2737 2738 if (security_possible == false){ 2739 log_info("IOCap/OOB insufficient for level %u -> abort", requested_security_level); 2740 hci_pairing_complete(conn, ERROR_CODE_INSUFFICIENT_SECURITY); 2741 connectionSetAuthenticationFlags(conn, AUTH_FLAG_SEND_IO_CAPABILITIES_NEGATIVE_REPLY); 2742 return; 2743 } 2744 } else { 2745 // initiator: remote io cap not yet, only check if we have ability for MITM protection if requested and OOB is not supported 2746 #ifndef ENABLE_CLASSIC_PAIRING_OOB 2747 #ifndef ENABLE_EXPLICIT_IO_CAPABILITIES_REPLY 2748 if ((conn->requested_security_level >= LEVEL_3) && (hci_stack->ssp_io_capability >= SSP_IO_CAPABILITY_NO_INPUT_NO_OUTPUT)){ 2749 log_info("Level 3+ required, but no input/output -> abort"); 2750 hci_pairing_complete(conn, ERROR_CODE_INSUFFICIENT_SECURITY); 2751 connectionSetAuthenticationFlags(conn, AUTH_FLAG_SEND_IO_CAPABILITIES_NEGATIVE_REPLY); 2752 return; 2753 } 2754 #endif 2755 #endif 2756 } 2757 2758 #ifndef ENABLE_EXPLICIT_IO_CAPABILITIES_REPLY 2759 if (hci_stack->ssp_io_capability != SSP_IO_CAPABILITY_UNKNOWN){ 2760 connectionSetAuthenticationFlags(conn, AUTH_FLAG_SEND_IO_CAPABILITIES_REPLY); 2761 } else { 2762 connectionSetAuthenticationFlags(conn, AUTH_FLAG_SEND_IO_CAPABILITIES_NEGATIVE_REPLY); 2763 } 2764 #endif 2765 } 2766 2767 #endif 2768 2769 static void event_handler(uint8_t *packet, uint16_t size){ 2770 2771 uint16_t event_length = packet[1]; 2772 2773 // assert packet is complete 2774 if (size != (event_length + 2u)){ 2775 log_error("event_handler called with packet of wrong size %d, expected %u => dropping packet", size, event_length + 2); 2776 return; 2777 } 2778 2779 bd_addr_type_t addr_type; 2780 hci_con_handle_t handle; 2781 hci_connection_t * conn; 2782 int i; 2783 int create_connection_cmd; 2784 2785 #ifdef ENABLE_CLASSIC 2786 hci_link_type_t link_type; 2787 bd_addr_t addr; 2788 #endif 2789 2790 // log_info("HCI:EVENT:%02x", hci_event_packet_get_type(packet)); 2791 2792 switch (hci_event_packet_get_type(packet)) { 2793 2794 case HCI_EVENT_COMMAND_COMPLETE: 2795 handle_command_complete_event(packet, size); 2796 break; 2797 2798 case HCI_EVENT_COMMAND_STATUS: 2799 // get num cmd packets - limit to 1 to reduce complexity 2800 hci_stack->num_cmd_packets = packet[3] ? 1 : 0; 2801 2802 // check command status to detected failed outgoing connections 2803 create_connection_cmd = 0; 2804 #ifdef ENABLE_CLASSIC 2805 if (HCI_EVENT_IS_COMMAND_STATUS(packet, hci_create_connection)){ 2806 create_connection_cmd = 1; 2807 } 2808 if (HCI_EVENT_IS_COMMAND_STATUS(packet, hci_accept_synchronous_connection)){ 2809 create_connection_cmd = 1; 2810 } 2811 #endif 2812 #ifdef ENABLE_LE_CENTRAL 2813 if (HCI_EVENT_IS_COMMAND_STATUS(packet, hci_le_create_connection)){ 2814 create_connection_cmd = 1; 2815 } 2816 #endif 2817 if (create_connection_cmd) { 2818 uint8_t status = hci_event_command_status_get_status(packet); 2819 addr_type = hci_stack->outgoing_addr_type; 2820 conn = hci_connection_for_bd_addr_and_type(hci_stack->outgoing_addr, addr_type); 2821 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); 2822 2823 // reset outgoing address info 2824 memset(hci_stack->outgoing_addr, 0, 6); 2825 hci_stack->outgoing_addr_type = BD_ADDR_TYPE_UNKNOWN; 2826 2827 // on error 2828 if (status != ERROR_CODE_SUCCESS){ 2829 #ifdef ENABLE_LE_CENTRAL 2830 if (hci_is_le_connection_type(addr_type)){ 2831 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 2832 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 2833 } 2834 #endif 2835 // error => outgoing connection failed 2836 if (conn != NULL){ 2837 hci_handle_connection_failed(conn, status); 2838 } 2839 } 2840 } 2841 2842 #ifdef ENABLE_CLASSIC 2843 if (HCI_EVENT_IS_COMMAND_STATUS(packet, hci_inquiry)) { 2844 uint8_t status = hci_event_command_status_get_status(packet); 2845 log_info("command status (inquiry), status %x", status); 2846 if (status == ERROR_CODE_SUCCESS) { 2847 hci_stack->inquiry_state = GAP_INQUIRY_STATE_ACTIVE; 2848 } else { 2849 hci_stack->inquiry_state = GAP_INQUIRY_STATE_IDLE; 2850 } 2851 } 2852 #endif 2853 break; 2854 2855 case HCI_EVENT_NUMBER_OF_COMPLETED_PACKETS:{ 2856 if (size < 3) return; 2857 uint16_t num_handles = packet[2]; 2858 if (size != (3u + num_handles * 4u)) return; 2859 uint16_t offset = 3; 2860 for (i=0; i<num_handles;i++){ 2861 handle = little_endian_read_16(packet, offset) & 0x0fffu; 2862 offset += 2u; 2863 uint16_t num_packets = little_endian_read_16(packet, offset); 2864 offset += 2u; 2865 2866 conn = hci_connection_for_handle(handle); 2867 if (!conn){ 2868 log_error("hci_number_completed_packet lists unused con handle %u", handle); 2869 continue; 2870 } 2871 2872 if (conn->num_packets_sent >= num_packets){ 2873 conn->num_packets_sent -= num_packets; 2874 } else { 2875 log_error("hci_number_completed_packets, more packet slots freed then sent."); 2876 conn->num_packets_sent = 0; 2877 } 2878 // log_info("hci_number_completed_packet %u processed for handle %u, outstanding %u", num_packets, handle, conn->num_packets_sent); 2879 2880 #ifdef ENABLE_CLASSIC 2881 // For SCO, we do the can_send_now_check here 2882 hci_notify_if_sco_can_send_now(); 2883 #endif 2884 } 2885 break; 2886 } 2887 2888 #ifdef ENABLE_CLASSIC 2889 case HCI_EVENT_INQUIRY_COMPLETE: 2890 if (hci_stack->inquiry_state == GAP_INQUIRY_STATE_ACTIVE){ 2891 hci_stack->inquiry_state = GAP_INQUIRY_STATE_IDLE; 2892 uint8_t event[] = { GAP_EVENT_INQUIRY_COMPLETE, 1, 0}; 2893 hci_emit_event(event, sizeof(event), 1); 2894 } 2895 break; 2896 case HCI_EVENT_REMOTE_NAME_REQUEST_COMPLETE: 2897 if (hci_stack->remote_name_state == GAP_REMOTE_NAME_STATE_W4_COMPLETE){ 2898 hci_stack->remote_name_state = GAP_REMOTE_NAME_STATE_IDLE; 2899 } 2900 break; 2901 case HCI_EVENT_CONNECTION_REQUEST: 2902 reverse_bd_addr(&packet[2], addr); 2903 link_type = (hci_link_type_t) packet[11]; 2904 2905 // CVE-2020-26555: reject incoming connection from device with same BD ADDR 2906 if (memcmp(hci_stack->local_bd_addr, addr, 6) == 0){ 2907 hci_stack->decline_reason = ERROR_CODE_CONNECTION_REJECTED_DUE_TO_UNACCEPTABLE_BD_ADDR; 2908 bd_addr_copy(hci_stack->decline_addr, addr); 2909 break; 2910 } 2911 2912 if (hci_stack->gap_classic_accept_callback != NULL){ 2913 if ((*hci_stack->gap_classic_accept_callback)(addr, link_type) == 0){ 2914 hci_stack->decline_reason = ERROR_CODE_CONNECTION_REJECTED_DUE_TO_UNACCEPTABLE_BD_ADDR; 2915 bd_addr_copy(hci_stack->decline_addr, addr); 2916 break; 2917 } 2918 } 2919 2920 // TODO: eval COD 8-10 2921 log_info("Connection_incoming: %s, type %u", bd_addr_to_str(addr), (unsigned int) link_type); 2922 addr_type = (link_type == HCI_LINK_TYPE_ACL) ? BD_ADDR_TYPE_ACL : BD_ADDR_TYPE_SCO; 2923 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 2924 if (!conn) { 2925 conn = create_connection_for_bd_addr_and_type(addr, addr_type); 2926 } 2927 if (!conn) { 2928 // CONNECTION REJECTED DUE TO LIMITED RESOURCES (0X0D) 2929 hci_stack->decline_reason = ERROR_CODE_CONNECTION_REJECTED_DUE_TO_LIMITED_RESOURCES; 2930 bd_addr_copy(hci_stack->decline_addr, addr); 2931 hci_run(); 2932 // avoid event to higher layer 2933 return; 2934 } 2935 conn->role = HCI_ROLE_SLAVE; 2936 conn->state = RECEIVED_CONNECTION_REQUEST; 2937 // store info about eSCO 2938 if (link_type == HCI_LINK_TYPE_ESCO){ 2939 conn->remote_supported_features[0] |= 1; 2940 } 2941 hci_run(); 2942 break; 2943 2944 case HCI_EVENT_CONNECTION_COMPLETE: 2945 // Connection management 2946 reverse_bd_addr(&packet[5], addr); 2947 log_info("Connection_complete (status=%u) %s", packet[2], bd_addr_to_str(addr)); 2948 addr_type = BD_ADDR_TYPE_ACL; 2949 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 2950 if (conn) { 2951 if (!packet[2]){ 2952 conn->state = OPEN; 2953 conn->con_handle = little_endian_read_16(packet, 3); 2954 2955 // queue set supervision timeout if we're master 2956 if ((hci_stack->link_supervision_timeout != HCI_LINK_SUPERVISION_TIMEOUT_DEFAULT) && (conn->role == HCI_ROLE_MASTER)){ 2957 connectionSetAuthenticationFlags(conn, AUTH_FLAG_WRITE_SUPERVISION_TIMEOUT); 2958 } 2959 2960 // restart timer 2961 btstack_run_loop_set_timer(&conn->timeout, HCI_CONNECTION_TIMEOUT_MS); 2962 btstack_run_loop_add_timer(&conn->timeout); 2963 2964 // trigger remote features for dedicated bonding 2965 if ((conn->bonding_flags & BONDING_DEDICATED) != 0){ 2966 hci_trigger_remote_features_for_connection(conn); 2967 } 2968 2969 log_info("New connection: handle %u, %s", conn->con_handle, bd_addr_to_str(conn->address)); 2970 2971 hci_emit_nr_connections_changed(); 2972 } else { 2973 // connection failed 2974 hci_handle_connection_failed(conn, packet[2]); 2975 } 2976 } 2977 break; 2978 2979 case HCI_EVENT_SYNCHRONOUS_CONNECTION_COMPLETE: 2980 reverse_bd_addr(&packet[5], addr); 2981 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_SCO); 2982 log_info("Synchronous Connection Complete for %p (status=%u) %s", conn, packet[2], bd_addr_to_str(addr)); 2983 if (packet[2]){ 2984 // connection failed 2985 if (conn){ 2986 hci_handle_connection_failed(conn, packet[2]); 2987 } 2988 break; 2989 } 2990 if (!conn) { 2991 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_SCO); 2992 } 2993 if (!conn) { 2994 break; 2995 } 2996 conn->state = OPEN; 2997 conn->con_handle = little_endian_read_16(packet, 3); 2998 2999 #ifdef ENABLE_SCO_OVER_HCI 3000 // update SCO 3001 if (conn->address_type == BD_ADDR_TYPE_SCO && hci_stack->hci_transport && hci_stack->hci_transport->set_sco_config){ 3002 hci_stack->hci_transport->set_sco_config(hci_stack->sco_voice_setting_active, hci_number_sco_connections()); 3003 } 3004 // trigger can send now 3005 if (hci_have_usb_transport()){ 3006 hci_stack->sco_can_send_now = true; 3007 } 3008 #endif 3009 #ifdef HAVE_SCO_TRANSPORT 3010 // configure sco transport 3011 if (hci_stack->sco_transport != NULL){ 3012 sco_format_t sco_format = ((hci_stack->sco_voice_setting_active & 0x03) == 0x03) ? SCO_FORMAT_8_BIT : SCO_FORMAT_16_BIT; 3013 hci_stack->sco_transport->open(conn->con_handle, sco_format); 3014 } 3015 #endif 3016 break; 3017 3018 case HCI_EVENT_READ_REMOTE_SUPPORTED_FEATURES_COMPLETE: 3019 handle = little_endian_read_16(packet, 3); 3020 conn = hci_connection_for_handle(handle); 3021 if (!conn) break; 3022 if (!packet[2]){ 3023 const uint8_t * features = &packet[5]; 3024 hci_handle_remote_features_page_0(conn, features); 3025 3026 // read extended features if possible 3027 if (hci_command_supported(SUPPORTED_HCI_COMMAND_READ_REMOTE_EXTENDED_FEATURES) 3028 && ((conn->remote_supported_features[0] & 2) != 0)) { 3029 conn->bonding_flags |= BONDING_REQUEST_REMOTE_FEATURES_PAGE_1; 3030 break; 3031 } 3032 } 3033 hci_handle_remote_features_received(conn); 3034 break; 3035 3036 case HCI_EVENT_READ_REMOTE_EXTENDED_FEATURES_COMPLETE: 3037 handle = little_endian_read_16(packet, 3); 3038 conn = hci_connection_for_handle(handle); 3039 if (!conn) break; 3040 // status = ok, page = 1 3041 if (!packet[2]) { 3042 uint8_t page_number = packet[5]; 3043 uint8_t maximum_page_number = packet[6]; 3044 const uint8_t * features = &packet[7]; 3045 bool done = false; 3046 switch (page_number){ 3047 case 1: 3048 hci_handle_remote_features_page_1(conn, features); 3049 if (maximum_page_number >= 2){ 3050 // get Secure Connections (Controller) from Page 2 if available 3051 conn->bonding_flags |= BONDING_REQUEST_REMOTE_FEATURES_PAGE_2; 3052 } else { 3053 // otherwise, assume SC (Controller) == SC (Host) 3054 if ((conn->bonding_flags & BONDING_REMOTE_SUPPORTS_SC_HOST) != 0){ 3055 conn->bonding_flags |= BONDING_REMOTE_SUPPORTS_SC_CONTROLLER; 3056 } 3057 done = true; 3058 } 3059 break; 3060 case 2: 3061 hci_handle_remote_features_page_2(conn, features); 3062 done = true; 3063 break; 3064 default: 3065 break; 3066 } 3067 if (!done) break; 3068 } 3069 hci_handle_remote_features_received(conn); 3070 break; 3071 3072 case HCI_EVENT_LINK_KEY_REQUEST: 3073 #ifndef ENABLE_EXPLICIT_LINK_KEY_REPLY 3074 hci_event_link_key_request_get_bd_addr(packet, addr); 3075 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 3076 if (!conn) break; 3077 3078 // lookup link key in db if not cached 3079 if ((conn->link_key_type == INVALID_LINK_KEY) && (hci_stack->link_key_db != NULL)){ 3080 hci_stack->link_key_db->get_link_key(conn->address, conn->link_key, &conn->link_key_type); 3081 } 3082 3083 // response sent by hci_run() 3084 conn->authentication_flags |= AUTH_FLAG_HANDLE_LINK_KEY_REQUEST; 3085 #endif 3086 break; 3087 3088 case HCI_EVENT_LINK_KEY_NOTIFICATION: { 3089 hci_event_link_key_request_get_bd_addr(packet, addr); 3090 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 3091 if (!conn) break; 3092 3093 hci_pairing_complete(conn, ERROR_CODE_SUCCESS); 3094 3095 // CVE-2020-26555: ignore NULL link key 3096 // default link_key_type = INVALID_LINK_KEY asserts that NULL key won't be used for encryption 3097 if (btstack_is_null(&packet[8], 16)) break; 3098 3099 link_key_type_t link_key_type = (link_key_type_t)packet[24]; 3100 // Change Connection Encryption keeps link key type 3101 if (link_key_type != CHANGED_COMBINATION_KEY){ 3102 conn->link_key_type = link_key_type; 3103 } 3104 3105 // cache link key. link keys stored in little-endian format for legacy reasons 3106 memcpy(&conn->link_key, &packet[8], 16); 3107 3108 // only store link key: 3109 // - if bondable enabled 3110 if (hci_stack->bondable == false) break; 3111 // - if security level sufficient 3112 if (gap_security_level_for_link_key_type(link_key_type) < conn->requested_security_level) break; 3113 // - for SSP, also check if remote side requested bonding as well 3114 if (conn->link_key_type != COMBINATION_KEY){ 3115 bool remote_bonding = conn->io_cap_response_auth_req >= SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_DEDICATED_BONDING; 3116 if (!remote_bonding){ 3117 break; 3118 } 3119 } 3120 gap_store_link_key_for_bd_addr(addr, &packet[8], conn->link_key_type); 3121 break; 3122 } 3123 3124 case HCI_EVENT_PIN_CODE_REQUEST: 3125 hci_event_pin_code_request_get_bd_addr(packet, addr); 3126 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 3127 if (!conn) break; 3128 3129 hci_pairing_started(conn, false); 3130 // abort pairing if: non-bondable mode (pin code request is not forwarded to app) 3131 if (!hci_stack->bondable ){ 3132 conn->authentication_flags |= AUTH_FLAG_DENY_PIN_CODE_REQUEST; 3133 hci_pairing_complete(conn, ERROR_CODE_PAIRING_NOT_ALLOWED); 3134 hci_run(); 3135 return; 3136 } 3137 // abort pairing if: LEVEL_4 required (pin code request is not forwarded to app) 3138 if ((hci_stack->gap_secure_connections_only_mode) || (conn->requested_security_level == LEVEL_4)){ 3139 log_info("Level 4 required, but SC not supported -> abort"); 3140 conn->authentication_flags |= AUTH_FLAG_DENY_PIN_CODE_REQUEST; 3141 hci_pairing_complete(conn, ERROR_CODE_INSUFFICIENT_SECURITY); 3142 hci_run(); 3143 return; 3144 } 3145 break; 3146 3147 case HCI_EVENT_IO_CAPABILITY_RESPONSE: 3148 hci_event_io_capability_response_get_bd_addr(packet, addr); 3149 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 3150 if (!conn) break; 3151 3152 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], AUTH_FLAG_RECV_IO_CAPABILITIES_RESPONSE); 3153 hci_pairing_started(conn, true); 3154 conn->io_cap_response_auth_req = hci_event_io_capability_response_get_authentication_requirements(packet); 3155 conn->io_cap_response_io = hci_event_io_capability_response_get_io_capability(packet); 3156 #ifdef ENABLE_CLASSIC_PAIRING_OOB 3157 conn->io_cap_response_oob_data = hci_event_io_capability_response_get_oob_data_present(packet); 3158 #endif 3159 break; 3160 3161 case HCI_EVENT_IO_CAPABILITY_REQUEST: 3162 hci_event_io_capability_response_get_bd_addr(packet, addr); 3163 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 3164 if (!conn) break; 3165 3166 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], AUTH_FLAG_RECV_IO_CAPABILITIES_REQUEST); 3167 hci_connection_timestamp(conn); 3168 hci_pairing_started(conn, true); 3169 break; 3170 3171 #ifdef ENABLE_CLASSIC_PAIRING_OOB 3172 case HCI_EVENT_REMOTE_OOB_DATA_REQUEST: 3173 hci_event_remote_oob_data_request_get_bd_addr(packet, addr); 3174 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 3175 if (!conn) break; 3176 3177 hci_connection_timestamp(conn); 3178 3179 hci_pairing_started(conn, true); 3180 3181 connectionSetAuthenticationFlags(conn, AUTH_FLAG_SEND_REMOTE_OOB_DATA_REPLY); 3182 break; 3183 #endif 3184 3185 case HCI_EVENT_USER_CONFIRMATION_REQUEST: 3186 hci_event_user_confirmation_request_get_bd_addr(packet, addr); 3187 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 3188 if (!conn) break; 3189 if (hci_ssp_security_level_possible_for_io_cap(conn->requested_security_level, hci_stack->ssp_io_capability, conn->io_cap_response_io)) { 3190 if (hci_stack->ssp_auto_accept){ 3191 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], AUTH_FLAG_SEND_USER_CONFIRM_REPLY); 3192 }; 3193 } else { 3194 hci_pairing_complete(conn, ERROR_CODE_INSUFFICIENT_SECURITY); 3195 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], AUTH_FLAG_SEND_USER_CONFIRM_NEGATIVE_REPLY); 3196 // don't forward event to app 3197 hci_run(); 3198 return; 3199 } 3200 break; 3201 3202 case HCI_EVENT_USER_PASSKEY_REQUEST: 3203 // Pairing using Passkey results in MITM protection. If Level 4 is required, support for SC is validated on IO Cap Request 3204 if (hci_stack->ssp_auto_accept){ 3205 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], AUTH_FLAG_SEND_USER_PASSKEY_REPLY); 3206 }; 3207 break; 3208 3209 case HCI_EVENT_MODE_CHANGE: 3210 handle = hci_event_mode_change_get_handle(packet); 3211 conn = hci_connection_for_handle(handle); 3212 if (!conn) break; 3213 conn->connection_mode = hci_event_mode_change_get_mode(packet); 3214 log_info("HCI_EVENT_MODE_CHANGE, handle 0x%04x, mode %u", handle, conn->connection_mode); 3215 break; 3216 #endif 3217 3218 case HCI_EVENT_ENCRYPTION_CHANGE: 3219 handle = hci_event_encryption_change_get_connection_handle(packet); 3220 conn = hci_connection_for_handle(handle); 3221 if (!conn) break; 3222 if (hci_event_encryption_change_get_status(packet) == 0u) { 3223 uint8_t encryption_enabled = hci_event_encryption_change_get_encryption_enabled(packet); 3224 if (encryption_enabled){ 3225 if (hci_is_le_connection(conn)){ 3226 // For LE, we accept connection as encrypted 3227 conn->authentication_flags |= AUTH_FLAG_CONNECTION_ENCRYPTED; 3228 } 3229 #ifdef ENABLE_CLASSIC 3230 else { 3231 3232 // dedicated bonding: send result and disconnect 3233 if (conn->bonding_flags & BONDING_DEDICATED){ 3234 conn->bonding_flags &= ~BONDING_DEDICATED; 3235 conn->bonding_flags |= BONDING_DISCONNECT_DEDICATED_DONE; 3236 conn->bonding_status = packet[2]; 3237 break; 3238 } 3239 3240 // Detect Secure Connection -> Legacy Connection Downgrade Attack (BIAS) 3241 bool sc_used_during_pairing = gap_secure_connection_for_link_key_type(conn->link_key_type); 3242 bool connected_uses_aes_ccm = encryption_enabled == 2; 3243 if (hci_stack->secure_connections_active && sc_used_during_pairing && !connected_uses_aes_ccm){ 3244 log_info("SC during pairing, but only E0 now -> abort"); 3245 conn->bonding_flags |= BONDING_DISCONNECT_SECURITY_BLOCK; 3246 break; 3247 } 3248 3249 // if AES-CCM is used, authentication used SC -> authentication was mutual and we can skip explicit authentication 3250 if (connected_uses_aes_ccm){ 3251 conn->authentication_flags |= AUTH_FLAG_CONNECTION_AUTHENTICATED; 3252 } 3253 3254 #ifdef ENABLE_TESTING_SUPPORT 3255 // work around for issue with PTS dongle 3256 conn->authentication_flags |= AUTH_FLAG_CONNECTION_AUTHENTICATED; 3257 #endif 3258 if (hci_command_supported(SUPPORTED_HCI_COMMAND_READ_ENCRYPTION_KEY_SIZE)){ 3259 // For Classic, we need to validate encryption key size first, if possible (== supported by Controller) 3260 conn->bonding_flags |= BONDING_SEND_READ_ENCRYPTION_KEY_SIZE; 3261 } else { 3262 // if not, pretend everything is perfect 3263 hci_handle_read_encryption_key_size_complete(conn, 16); 3264 } 3265 } 3266 #endif 3267 } else { 3268 conn->authentication_flags &= ~AUTH_FLAG_CONNECTION_ENCRYPTED; 3269 } 3270 } 3271 3272 break; 3273 3274 #ifdef ENABLE_CLASSIC 3275 case HCI_EVENT_AUTHENTICATION_COMPLETE_EVENT: 3276 handle = hci_event_authentication_complete_get_connection_handle(packet); 3277 conn = hci_connection_for_handle(handle); 3278 if (!conn) break; 3279 3280 // clear authentication active flag 3281 conn->bonding_flags &= ~BONDING_SENT_AUTHENTICATE_REQUEST; 3282 hci_pairing_complete(conn, hci_event_authentication_complete_get_status(packet)); 3283 3284 // authenticated only if auth status == 0 3285 if (hci_event_authentication_complete_get_status(packet) == 0){ 3286 // authenticated 3287 conn->authentication_flags |= AUTH_FLAG_CONNECTION_AUTHENTICATED; 3288 3289 // If not already encrypted, start encryption 3290 if ((conn->authentication_flags & AUTH_FLAG_CONNECTION_ENCRYPTED) == 0){ 3291 conn->bonding_flags |= BONDING_SEND_ENCRYPTION_REQUEST; 3292 break; 3293 } 3294 } 3295 3296 // emit updated security level 3297 hci_emit_security_level(handle, gap_security_level_for_connection(conn)); 3298 break; 3299 3300 case HCI_EVENT_SIMPLE_PAIRING_COMPLETE: 3301 hci_event_simple_pairing_complete_get_bd_addr(packet, addr); 3302 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 3303 if (!conn) break; 3304 3305 // treat successfully paired connection as authenticated 3306 if (hci_event_simple_pairing_complete_get_status(packet) == ERROR_CODE_SUCCESS){ 3307 conn->authentication_flags |= AUTH_FLAG_CONNECTION_AUTHENTICATED; 3308 } 3309 3310 hci_pairing_complete(conn, hci_event_simple_pairing_complete_get_status(packet)); 3311 break; 3312 #endif 3313 3314 // HCI_EVENT_DISCONNECTION_COMPLETE 3315 // has been split, to first notify stack before shutting connection down 3316 // see end of function, too. 3317 case HCI_EVENT_DISCONNECTION_COMPLETE: 3318 if (packet[2]) break; // status != 0 3319 handle = little_endian_read_16(packet, 3); 3320 // drop outgoing ACL fragments if it is for closed connection and release buffer if tx not active 3321 if (hci_stack->acl_fragmentation_total_size > 0u) { 3322 if (handle == READ_ACL_CONNECTION_HANDLE(hci_stack->hci_packet_buffer)){ 3323 int release_buffer = hci_stack->acl_fragmentation_tx_active == 0u; 3324 log_info("drop fragmented ACL data for closed connection, release buffer %u", release_buffer); 3325 hci_stack->acl_fragmentation_total_size = 0; 3326 hci_stack->acl_fragmentation_pos = 0; 3327 if (release_buffer){ 3328 hci_release_packet_buffer(); 3329 } 3330 } 3331 } 3332 3333 conn = hci_connection_for_handle(handle); 3334 if (!conn) break; 3335 #ifdef ENABLE_CLASSIC 3336 // pairing failed if it was ongoing 3337 hci_pairing_complete(conn, ERROR_CODE_REMOTE_USER_TERMINATED_CONNECTION); 3338 #endif 3339 3340 // emit dedicatd bonding event 3341 if (conn->bonding_flags & BONDING_EMIT_COMPLETE_ON_DISCONNECT){ 3342 hci_emit_dedicated_bonding_result(conn->address, conn->bonding_status); 3343 } 3344 3345 // mark connection for shutdown, stop timers, reset state 3346 conn->state = RECEIVED_DISCONNECTION_COMPLETE; 3347 hci_connection_stop_timer(conn); 3348 hci_connection_init(conn); 3349 3350 #ifdef ENABLE_BLE 3351 #ifdef ENABLE_LE_PERIPHERAL 3352 // re-enable advertisements for le connections if active 3353 if (hci_is_le_connection(conn)){ 3354 hci_update_advertisements_enabled_for_current_roles(); 3355 } 3356 #endif 3357 #endif 3358 break; 3359 3360 case HCI_EVENT_HARDWARE_ERROR: 3361 log_error("Hardware Error: 0x%02x", packet[2]); 3362 if (hci_stack->hardware_error_callback){ 3363 (*hci_stack->hardware_error_callback)(packet[2]); 3364 } else { 3365 // if no special requests, just reboot stack 3366 hci_power_control_off(); 3367 hci_power_control_on(); 3368 } 3369 break; 3370 3371 #ifdef ENABLE_CLASSIC 3372 case HCI_EVENT_ROLE_CHANGE: 3373 if (packet[2]) break; // status != 0 3374 reverse_bd_addr(&packet[3], addr); 3375 addr_type = BD_ADDR_TYPE_ACL; 3376 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 3377 if (!conn) break; 3378 conn->role = packet[9]; 3379 break; 3380 #endif 3381 3382 case HCI_EVENT_TRANSPORT_PACKET_SENT: 3383 // release packet buffer only for asynchronous transport and if there are not further fragements 3384 if (hci_transport_synchronous()) { 3385 log_error("Synchronous HCI Transport shouldn't send HCI_EVENT_TRANSPORT_PACKET_SENT"); 3386 return; // instead of break: to avoid re-entering hci_run() 3387 } 3388 hci_stack->acl_fragmentation_tx_active = 0; 3389 if (hci_stack->acl_fragmentation_total_size) break; 3390 hci_release_packet_buffer(); 3391 3392 // L2CAP receives this event via the hci_emit_event below 3393 3394 #ifdef ENABLE_CLASSIC 3395 // For SCO, we do the can_send_now_check here 3396 hci_notify_if_sco_can_send_now(); 3397 #endif 3398 break; 3399 3400 #ifdef ENABLE_CLASSIC 3401 case HCI_EVENT_SCO_CAN_SEND_NOW: 3402 // For SCO, we do the can_send_now_check here 3403 hci_stack->sco_can_send_now = true; 3404 hci_notify_if_sco_can_send_now(); 3405 return; 3406 3407 // explode inquriy results for easier consumption 3408 case HCI_EVENT_INQUIRY_RESULT: 3409 case HCI_EVENT_INQUIRY_RESULT_WITH_RSSI: 3410 case HCI_EVENT_EXTENDED_INQUIRY_RESPONSE: 3411 gap_inquiry_explode(packet, size); 3412 break; 3413 #endif 3414 3415 #ifdef ENABLE_BLE 3416 case HCI_EVENT_LE_META: 3417 switch (packet[2]){ 3418 #ifdef ENABLE_LE_CENTRAL 3419 case HCI_SUBEVENT_LE_ADVERTISING_REPORT: 3420 if (!hci_stack->le_scanning_enabled) break; 3421 le_handle_advertisement_report(packet, size); 3422 break; 3423 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 3424 case HCI_SUBEVENT_LE_EXTENDED_ADVERTISING_REPORT: 3425 if (!hci_stack->le_scanning_enabled) break; 3426 le_handle_extended_advertisement_report(packet, size); 3427 break; 3428 #endif 3429 #endif 3430 case HCI_SUBEVENT_LE_CONNECTION_COMPLETE: 3431 event_handle_le_connection_complete(packet); 3432 break; 3433 3434 // log_info("LE buffer size: %u, count %u", little_endian_read_16(packet,6), packet[8]); 3435 case HCI_SUBEVENT_LE_CONNECTION_UPDATE_COMPLETE: 3436 handle = hci_subevent_le_connection_update_complete_get_connection_handle(packet); 3437 conn = hci_connection_for_handle(handle); 3438 if (!conn) break; 3439 conn->le_connection_interval = hci_subevent_le_connection_update_complete_get_conn_interval(packet); 3440 break; 3441 3442 case HCI_SUBEVENT_LE_REMOTE_CONNECTION_PARAMETER_REQUEST: 3443 // connection 3444 handle = hci_subevent_le_remote_connection_parameter_request_get_connection_handle(packet); 3445 conn = hci_connection_for_handle(handle); 3446 if (conn) { 3447 // read arguments 3448 uint16_t le_conn_interval_min = hci_subevent_le_remote_connection_parameter_request_get_interval_min(packet); 3449 uint16_t le_conn_interval_max = hci_subevent_le_remote_connection_parameter_request_get_interval_max(packet); 3450 uint16_t le_conn_latency = hci_subevent_le_remote_connection_parameter_request_get_latency(packet); 3451 uint16_t le_supervision_timeout = hci_subevent_le_remote_connection_parameter_request_get_timeout(packet); 3452 3453 // validate against current connection parameter range 3454 le_connection_parameter_range_t existing_range; 3455 gap_get_connection_parameter_range(&existing_range); 3456 int update_parameter = gap_connection_parameter_range_included(&existing_range, le_conn_interval_min, le_conn_interval_max, le_conn_latency, le_supervision_timeout); 3457 if (update_parameter){ 3458 conn->le_con_parameter_update_state = CON_PARAMETER_UPDATE_REPLY; 3459 conn->le_conn_interval_min = le_conn_interval_min; 3460 conn->le_conn_interval_max = le_conn_interval_max; 3461 conn->le_conn_latency = le_conn_latency; 3462 conn->le_supervision_timeout = le_supervision_timeout; 3463 } else { 3464 conn->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NEGATIVE_REPLY; 3465 } 3466 } 3467 break; 3468 #ifdef ENABLE_LE_LIMIT_ACL_FRAGMENT_BY_MAX_OCTETS 3469 case HCI_SUBEVENT_LE_DATA_LENGTH_CHANGE: 3470 handle = hci_subevent_le_data_length_change_get_connection_handle(packet); 3471 conn = hci_connection_for_handle(handle); 3472 if (conn) { 3473 conn->le_max_tx_octets = hci_subevent_le_data_length_change_get_max_tx_octets(packet); 3474 } 3475 break; 3476 #endif 3477 default: 3478 break; 3479 } 3480 break; 3481 #endif 3482 case HCI_EVENT_VENDOR_SPECIFIC: 3483 // Vendor specific commands often create vendor specific event instead of num completed packets 3484 // To avoid getting stuck as num_cmds_packets is zero, reset it to 1 for controllers with this behaviour 3485 switch (hci_stack->manufacturer){ 3486 case BLUETOOTH_COMPANY_ID_CAMBRIDGE_SILICON_RADIO: 3487 hci_stack->num_cmd_packets = 1; 3488 break; 3489 default: 3490 break; 3491 } 3492 break; 3493 default: 3494 break; 3495 } 3496 3497 handle_event_for_current_stack_state(packet, size); 3498 3499 // notify upper stack 3500 hci_emit_event(packet, size, 0); // don't dump, already happened in packet handler 3501 3502 // moved here to give upper stack a chance to close down everything with hci_connection_t intact 3503 if ((hci_event_packet_get_type(packet) == HCI_EVENT_DISCONNECTION_COMPLETE) && (packet[2] == 0)){ 3504 handle = little_endian_read_16(packet, 3); 3505 hci_connection_t * aConn = hci_connection_for_handle(handle); 3506 // discard connection if app did not trigger a reconnect in the event handler 3507 if (aConn && aConn->state == RECEIVED_DISCONNECTION_COMPLETE){ 3508 hci_shutdown_connection(aConn); 3509 } 3510 } 3511 3512 // execute main loop 3513 hci_run(); 3514 } 3515 3516 #ifdef ENABLE_CLASSIC 3517 3518 #ifdef ENABLE_SCO_OVER_HCI 3519 static void sco_tx_timeout_handler(btstack_timer_source_t * ts); 3520 static void sco_schedule_tx(hci_connection_t * conn); 3521 3522 static void sco_tx_timeout_handler(btstack_timer_source_t * ts){ 3523 log_debug("SCO TX Timeout"); 3524 hci_con_handle_t con_handle = (hci_con_handle_t) (uintptr_t) btstack_run_loop_get_timer_context(ts); 3525 hci_connection_t * conn = hci_connection_for_handle(con_handle); 3526 if (!conn) return; 3527 3528 // trigger send 3529 conn->sco_tx_ready = 1; 3530 // extra packet if CVSD but SCO buffer is too short 3531 if (((hci_stack->sco_voice_setting_active & 0x03) != 0x03) && (hci_stack->sco_data_packet_length < 123)){ 3532 conn->sco_tx_ready++; 3533 } 3534 hci_notify_if_sco_can_send_now(); 3535 } 3536 3537 3538 #define SCO_TX_AFTER_RX_MS (6) 3539 3540 static void sco_schedule_tx(hci_connection_t * conn){ 3541 3542 uint32_t now = btstack_run_loop_get_time_ms(); 3543 uint32_t sco_tx_ms = conn->sco_rx_ms + SCO_TX_AFTER_RX_MS; 3544 int time_delta_ms = sco_tx_ms - now; 3545 3546 btstack_timer_source_t * timer = (conn->sco_rx_count & 1) ? &conn->timeout : &conn->timeout_sco; 3547 3548 // log_error("SCO TX at %u in %u", (int) sco_tx_ms, time_delta_ms); 3549 btstack_run_loop_remove_timer(timer); 3550 btstack_run_loop_set_timer(timer, time_delta_ms); 3551 btstack_run_loop_set_timer_context(timer, (void *) (uintptr_t) conn->con_handle); 3552 btstack_run_loop_set_timer_handler(timer, &sco_tx_timeout_handler); 3553 btstack_run_loop_add_timer(timer); 3554 } 3555 #endif 3556 3557 static void sco_handler(uint8_t * packet, uint16_t size){ 3558 // lookup connection struct 3559 hci_con_handle_t con_handle = READ_SCO_CONNECTION_HANDLE(packet); 3560 hci_connection_t * conn = hci_connection_for_handle(con_handle); 3561 if (!conn) return; 3562 3563 #ifdef ENABLE_SCO_OVER_HCI 3564 // CSR 8811 prefixes 60 byte SCO packet in transparent mode with 20 zero bytes -> skip first 20 payload bytes 3565 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_CAMBRIDGE_SILICON_RADIO){ 3566 if ((size == 83) && ((hci_stack->sco_voice_setting_active & 0x03) == 0x03)){ 3567 packet[2] = 0x3c; 3568 memmove(&packet[3], &packet[23], 63); 3569 size = 63; 3570 } 3571 } 3572 3573 if (hci_have_usb_transport()){ 3574 // Nothing to do 3575 } else { 3576 // 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); 3577 if (hci_stack->synchronous_flow_control_enabled == 0){ 3578 uint32_t now = btstack_run_loop_get_time_ms(); 3579 3580 if (!conn->sco_rx_valid){ 3581 // ignore first 10 packets 3582 conn->sco_rx_count++; 3583 // log_debug("sco rx count %u", conn->sco_rx_count); 3584 if (conn->sco_rx_count == 10) { 3585 // use first timestamp as is and pretent it just started 3586 conn->sco_rx_ms = now; 3587 conn->sco_rx_valid = 1; 3588 conn->sco_rx_count = 0; 3589 sco_schedule_tx(conn); 3590 } 3591 } else { 3592 // track expected arrival timme 3593 conn->sco_rx_count++; 3594 conn->sco_rx_ms += 7; 3595 int delta = (int32_t) (now - conn->sco_rx_ms); 3596 if (delta > 0){ 3597 conn->sco_rx_ms++; 3598 } 3599 // log_debug("sco rx %u", conn->sco_rx_ms); 3600 sco_schedule_tx(conn); 3601 } 3602 } 3603 } 3604 #endif 3605 3606 // deliver to app 3607 if (hci_stack->sco_packet_handler) { 3608 hci_stack->sco_packet_handler(HCI_SCO_DATA_PACKET, 0, packet, size); 3609 } 3610 3611 #ifdef HAVE_SCO_TRANSPORT 3612 // We can send one packet for each received packet 3613 conn->sco_tx_ready++; 3614 hci_notify_if_sco_can_send_now(); 3615 #endif 3616 3617 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 3618 conn->num_packets_completed++; 3619 hci_stack->host_completed_packets = 1; 3620 hci_run(); 3621 #endif 3622 } 3623 #endif 3624 3625 static void packet_handler(uint8_t packet_type, uint8_t *packet, uint16_t size){ 3626 hci_dump_packet(packet_type, 1, packet, size); 3627 switch (packet_type) { 3628 case HCI_EVENT_PACKET: 3629 event_handler(packet, size); 3630 break; 3631 case HCI_ACL_DATA_PACKET: 3632 acl_handler(packet, size); 3633 break; 3634 #ifdef ENABLE_CLASSIC 3635 case HCI_SCO_DATA_PACKET: 3636 sco_handler(packet, size); 3637 break; 3638 #endif 3639 default: 3640 break; 3641 } 3642 } 3643 3644 /** 3645 * @brief Add event packet handler. 3646 */ 3647 void hci_add_event_handler(btstack_packet_callback_registration_t * callback_handler){ 3648 btstack_linked_list_add_tail(&hci_stack->event_handlers, (btstack_linked_item_t*) callback_handler); 3649 } 3650 3651 /** 3652 * @brief Remove event packet handler. 3653 */ 3654 void hci_remove_event_handler(btstack_packet_callback_registration_t * callback_handler){ 3655 btstack_linked_list_remove(&hci_stack->event_handlers, (btstack_linked_item_t*) callback_handler); 3656 } 3657 3658 /** Register HCI packet handlers */ 3659 void hci_register_acl_packet_handler(btstack_packet_handler_t handler){ 3660 hci_stack->acl_packet_handler = handler; 3661 } 3662 3663 #ifdef ENABLE_CLASSIC 3664 /** 3665 * @brief Registers a packet handler for SCO data. Used for HSP and HFP profiles. 3666 */ 3667 void hci_register_sco_packet_handler(btstack_packet_handler_t handler){ 3668 hci_stack->sco_packet_handler = handler; 3669 } 3670 #endif 3671 3672 static void hci_state_reset(void){ 3673 // no connections yet 3674 hci_stack->connections = NULL; 3675 3676 // keep discoverable/connectable as this has been requested by the client(s) 3677 // hci_stack->discoverable = 0; 3678 // hci_stack->connectable = 0; 3679 // hci_stack->bondable = 1; 3680 // hci_stack->own_addr_type = 0; 3681 3682 // buffer is free 3683 hci_stack->hci_packet_buffer_reserved = false; 3684 3685 // no pending cmds 3686 hci_stack->decline_reason = 0; 3687 3688 hci_stack->secure_connections_active = false; 3689 3690 #ifdef ENABLE_CLASSIC 3691 hci_stack->inquiry_lap = GAP_IAC_GENERAL_INQUIRY; 3692 hci_stack->page_timeout = 0x6000; // ca. 15 sec 3693 3694 hci_stack->gap_tasks_classic = 3695 GAP_TASK_SET_DEFAULT_LINK_POLICY | 3696 GAP_TASK_SET_CLASS_OF_DEVICE | 3697 GAP_TASK_SET_LOCAL_NAME | 3698 GAP_TASK_SET_EIR_DATA | 3699 GAP_TASK_WRITE_SCAN_ENABLE | 3700 GAP_TASK_WRITE_PAGE_TIMEOUT; 3701 #endif 3702 3703 #ifdef ENABLE_CLASSIC_PAIRING_OOB 3704 hci_stack->classic_read_local_oob_data = false; 3705 hci_stack->classic_oob_con_handle = HCI_CON_HANDLE_INVALID; 3706 #endif 3707 3708 // LE 3709 #ifdef ENABLE_BLE 3710 memset(hci_stack->le_random_address, 0, 6); 3711 hci_stack->le_random_address_set = 0; 3712 #endif 3713 #ifdef ENABLE_LE_CENTRAL 3714 hci_stack->le_scanning_active = false; 3715 hci_stack->le_scanning_param_update = true; 3716 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 3717 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 3718 hci_stack->le_whitelist_capacity = 0; 3719 #endif 3720 #ifdef ENABLE_LE_PERIPHERAL 3721 hci_stack->le_advertisements_state &= ~LE_ADVERTISEMENT_STATE_ACTIVE; 3722 if ((hci_stack->le_advertisements_state & LE_ADVERTISEMENT_STATE_PARAMS_SET) != 0){ 3723 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_PARAMS; 3724 } 3725 if (hci_stack->le_advertisements_data != NULL){ 3726 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_ADV_DATA; 3727 } 3728 #endif 3729 } 3730 3731 #ifdef ENABLE_CLASSIC 3732 /** 3733 * @brief Configure Bluetooth hardware control. Has to be called before power on. 3734 */ 3735 void hci_set_link_key_db(btstack_link_key_db_t const * link_key_db){ 3736 // store and open remote device db 3737 hci_stack->link_key_db = link_key_db; 3738 if (hci_stack->link_key_db) { 3739 hci_stack->link_key_db->open(); 3740 } 3741 } 3742 #endif 3743 3744 void hci_init(const hci_transport_t *transport, const void *config){ 3745 3746 #ifdef HAVE_MALLOC 3747 if (!hci_stack) { 3748 hci_stack = (hci_stack_t*) malloc(sizeof(hci_stack_t)); 3749 } 3750 #else 3751 hci_stack = &hci_stack_static; 3752 #endif 3753 memset(hci_stack, 0, sizeof(hci_stack_t)); 3754 3755 // reference to use transport layer implementation 3756 hci_stack->hci_transport = transport; 3757 3758 // reference to used config 3759 hci_stack->config = config; 3760 3761 // setup pointer for outgoing packet buffer 3762 hci_stack->hci_packet_buffer = &hci_stack->hci_packet_buffer_data[HCI_OUTGOING_PRE_BUFFER_SIZE]; 3763 3764 // max acl payload size defined in config.h 3765 hci_stack->acl_data_packet_length = HCI_ACL_PAYLOAD_SIZE; 3766 3767 // register packet handlers with transport 3768 transport->register_packet_handler(&packet_handler); 3769 3770 hci_stack->state = HCI_STATE_OFF; 3771 3772 // class of device 3773 hci_stack->class_of_device = 0x007a020c; // Smartphone 3774 3775 // bondable by default 3776 hci_stack->bondable = 1; 3777 3778 #ifdef ENABLE_CLASSIC 3779 // classic name 3780 hci_stack->local_name = default_classic_name; 3781 3782 // Master slave policy 3783 hci_stack->master_slave_policy = 1; 3784 3785 // Allow Role Switch 3786 hci_stack->allow_role_switch = 1; 3787 3788 // Default / minimum security level = 2 3789 hci_stack->gap_security_level = LEVEL_2; 3790 3791 // Default Security Mode 4 3792 hci_stack->gap_security_mode = GAP_SECURITY_MODE_4; 3793 3794 // Errata-11838 mandates 7 bytes for GAP Security Level 1-3 3795 hci_stack->gap_required_encyrption_key_size = 7; 3796 3797 // Link Supervision Timeout 3798 hci_stack->link_supervision_timeout = HCI_LINK_SUPERVISION_TIMEOUT_DEFAULT; 3799 3800 #endif 3801 3802 // Secure Simple Pairing default: enable, no I/O capabilities, general bonding, mitm not required, auto accept 3803 hci_stack->ssp_enable = 1; 3804 hci_stack->ssp_io_capability = SSP_IO_CAPABILITY_NO_INPUT_NO_OUTPUT; 3805 hci_stack->ssp_authentication_requirement = SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_GENERAL_BONDING; 3806 hci_stack->ssp_auto_accept = 1; 3807 3808 // Secure Connections: enable (requires support from Controller) 3809 hci_stack->secure_connections_enable = true; 3810 3811 // voice setting - signed 16 bit pcm data with CVSD over the air 3812 hci_stack->sco_voice_setting = 0x60; 3813 3814 #ifdef ENABLE_LE_CENTRAL 3815 // connection parameter to use for outgoing connections 3816 hci_stack->le_connection_scan_interval = 0x0060; // 60ms 3817 hci_stack->le_connection_scan_window = 0x0030; // 30ms 3818 hci_stack->le_connection_interval_min = 0x0008; // 10 ms 3819 hci_stack->le_connection_interval_max = 0x0018; // 30 ms 3820 hci_stack->le_connection_latency = 4; // 4 3821 hci_stack->le_supervision_timeout = 0x0048; // 720 ms 3822 hci_stack->le_minimum_ce_length = 2; // 1.25 ms 3823 hci_stack->le_maximum_ce_length = 0x0030; // 30 ms 3824 3825 // default LE Scanning 3826 hci_stack->le_scan_type = 0x1; // active 3827 hci_stack->le_scan_interval = 0x1e0; // 300 ms 3828 hci_stack->le_scan_window = 0x30; // 30 ms 3829 #endif 3830 3831 #ifdef ENABLE_LE_PERIPHERAL 3832 hci_stack->le_max_number_peripheral_connections = 1; // only single connection as peripheral 3833 #endif 3834 3835 // connection parameter range used to answer connection parameter update requests in l2cap 3836 hci_stack->le_connection_parameter_range.le_conn_interval_min = 6; 3837 hci_stack->le_connection_parameter_range.le_conn_interval_max = 3200; 3838 hci_stack->le_connection_parameter_range.le_conn_latency_min = 0; 3839 hci_stack->le_connection_parameter_range.le_conn_latency_max = 500; 3840 hci_stack->le_connection_parameter_range.le_supervision_timeout_min = 10; 3841 hci_stack->le_connection_parameter_range.le_supervision_timeout_max = 3200; 3842 3843 hci_state_reset(); 3844 } 3845 3846 void hci_deinit(void){ 3847 #ifdef HAVE_MALLOC 3848 if (hci_stack) { 3849 free(hci_stack); 3850 } 3851 #endif 3852 hci_stack = NULL; 3853 3854 #ifdef ENABLE_CLASSIC 3855 disable_l2cap_timeouts = 0; 3856 #endif 3857 } 3858 3859 /** 3860 * @brief Configure Bluetooth chipset driver. Has to be called before power on, or right after receiving the local version information 3861 */ 3862 void hci_set_chipset(const btstack_chipset_t *chipset_driver){ 3863 hci_stack->chipset = chipset_driver; 3864 3865 // reset chipset driver - init is also called on power_up 3866 if (hci_stack->chipset && hci_stack->chipset->init){ 3867 hci_stack->chipset->init(hci_stack->config); 3868 } 3869 } 3870 3871 /** 3872 * @brief Configure Bluetooth hardware control. Has to be called after hci_init() but before power on. 3873 */ 3874 void hci_set_control(const btstack_control_t *hardware_control){ 3875 // references to used control implementation 3876 hci_stack->control = hardware_control; 3877 // init with transport config 3878 hardware_control->init(hci_stack->config); 3879 } 3880 3881 static void hci_discard_connections(void){ 3882 btstack_linked_list_iterator_t lit; 3883 btstack_linked_list_iterator_init(&lit, &hci_stack->connections); 3884 while (btstack_linked_list_iterator_has_next(&lit)){ 3885 // cancel all l2cap connections by emitting dicsconnection complete before shutdown (free) connection 3886 hci_connection_t * connection = (hci_connection_t*) btstack_linked_list_iterator_next(&lit); 3887 hci_emit_disconnection_complete(connection->con_handle, 0x16); // terminated by local host 3888 hci_shutdown_connection(connection); 3889 } 3890 } 3891 3892 void hci_close(void){ 3893 3894 #ifdef ENABLE_CLASSIC 3895 // close remote device db 3896 if (hci_stack->link_key_db) { 3897 hci_stack->link_key_db->close(); 3898 } 3899 #endif 3900 3901 hci_discard_connections(); 3902 3903 hci_power_control(HCI_POWER_OFF); 3904 3905 #ifdef HAVE_MALLOC 3906 free(hci_stack); 3907 #endif 3908 hci_stack = NULL; 3909 } 3910 3911 #ifdef HAVE_SCO_TRANSPORT 3912 void hci_set_sco_transport(const btstack_sco_transport_t *sco_transport){ 3913 hci_stack->sco_transport = sco_transport; 3914 sco_transport->register_packet_handler(&packet_handler); 3915 } 3916 #endif 3917 3918 #ifdef ENABLE_CLASSIC 3919 void gap_set_required_encryption_key_size(uint8_t encryption_key_size){ 3920 // validate ranage and set 3921 if (encryption_key_size < 7) return; 3922 if (encryption_key_size > 16) return; 3923 hci_stack->gap_required_encyrption_key_size = encryption_key_size; 3924 } 3925 3926 uint8_t gap_set_security_mode(gap_security_mode_t security_mode){ 3927 if ((security_mode == GAP_SECURITY_MODE_4) || (security_mode == GAP_SECURITY_MODE_2)){ 3928 hci_stack->gap_security_mode = security_mode; 3929 return ERROR_CODE_SUCCESS; 3930 } else { 3931 return ERROR_CODE_UNSUPPORTED_FEATURE_OR_PARAMETER_VALUE; 3932 } 3933 } 3934 3935 gap_security_mode_t gap_get_security_mode(void){ 3936 return hci_stack->gap_security_mode; 3937 } 3938 3939 void gap_set_security_level(gap_security_level_t security_level){ 3940 hci_stack->gap_security_level = security_level; 3941 } 3942 3943 gap_security_level_t gap_get_security_level(void){ 3944 if (hci_stack->gap_secure_connections_only_mode){ 3945 return LEVEL_4; 3946 } 3947 return hci_stack->gap_security_level; 3948 } 3949 3950 void gap_set_minimal_service_security_level(gap_security_level_t security_level){ 3951 hci_stack->gap_minimal_service_security_level = security_level; 3952 } 3953 3954 void gap_set_secure_connections_only_mode(bool enable){ 3955 hci_stack->gap_secure_connections_only_mode = enable; 3956 } 3957 3958 bool gap_get_secure_connections_only_mode(void){ 3959 return hci_stack->gap_secure_connections_only_mode; 3960 } 3961 #endif 3962 3963 #ifdef ENABLE_CLASSIC 3964 void gap_set_class_of_device(uint32_t class_of_device){ 3965 hci_stack->class_of_device = class_of_device; 3966 hci_stack->gap_tasks_classic |= GAP_TASK_SET_CLASS_OF_DEVICE; 3967 hci_run(); 3968 } 3969 3970 void gap_set_default_link_policy_settings(uint16_t default_link_policy_settings){ 3971 hci_stack->default_link_policy_settings = default_link_policy_settings; 3972 hci_stack->gap_tasks_classic |= GAP_TASK_SET_DEFAULT_LINK_POLICY; 3973 hci_run(); 3974 } 3975 3976 void gap_set_allow_role_switch(bool allow_role_switch){ 3977 hci_stack->allow_role_switch = allow_role_switch ? 1 : 0; 3978 } 3979 3980 uint8_t hci_get_allow_role_switch(void){ 3981 return hci_stack->allow_role_switch; 3982 } 3983 3984 void gap_set_link_supervision_timeout(uint16_t link_supervision_timeout){ 3985 hci_stack->link_supervision_timeout = link_supervision_timeout; 3986 } 3987 3988 void hci_disable_l2cap_timeout_check(void){ 3989 disable_l2cap_timeouts = 1; 3990 } 3991 #endif 3992 3993 #ifndef HAVE_HOST_CONTROLLER_API 3994 // Set Public BD ADDR - passed on to Bluetooth chipset if supported in bt_control_h 3995 void hci_set_bd_addr(bd_addr_t addr){ 3996 (void)memcpy(hci_stack->custom_bd_addr, addr, 6); 3997 hci_stack->custom_bd_addr_set = 1; 3998 } 3999 #endif 4000 4001 // State-Module-Driver overview 4002 // state module low-level 4003 // HCI_STATE_OFF off close 4004 // HCI_STATE_INITIALIZING, on open 4005 // HCI_STATE_WORKING, on open 4006 // HCI_STATE_HALTING, on open 4007 // HCI_STATE_SLEEPING, off/sleep close 4008 // HCI_STATE_FALLING_ASLEEP on open 4009 4010 static int hci_power_control_on(void){ 4011 4012 // power on 4013 int err = 0; 4014 if (hci_stack->control && hci_stack->control->on){ 4015 err = (*hci_stack->control->on)(); 4016 } 4017 if (err){ 4018 log_error( "POWER_ON failed"); 4019 hci_emit_hci_open_failed(); 4020 return err; 4021 } 4022 4023 // int chipset driver 4024 if (hci_stack->chipset && hci_stack->chipset->init){ 4025 hci_stack->chipset->init(hci_stack->config); 4026 } 4027 4028 // init transport 4029 if (hci_stack->hci_transport->init){ 4030 hci_stack->hci_transport->init(hci_stack->config); 4031 } 4032 4033 // open transport 4034 err = hci_stack->hci_transport->open(); 4035 if (err){ 4036 log_error( "HCI_INIT failed, turning Bluetooth off again"); 4037 if (hci_stack->control && hci_stack->control->off){ 4038 (*hci_stack->control->off)(); 4039 } 4040 hci_emit_hci_open_failed(); 4041 return err; 4042 } 4043 return 0; 4044 } 4045 4046 static void hci_power_control_off(void){ 4047 4048 log_info("hci_power_control_off"); 4049 4050 // close low-level device 4051 hci_stack->hci_transport->close(); 4052 4053 log_info("hci_power_control_off - hci_transport closed"); 4054 4055 // power off 4056 if (hci_stack->control && hci_stack->control->off){ 4057 (*hci_stack->control->off)(); 4058 } 4059 4060 log_info("hci_power_control_off - control closed"); 4061 4062 hci_stack->state = HCI_STATE_OFF; 4063 } 4064 4065 static void hci_power_control_sleep(void){ 4066 4067 log_info("hci_power_control_sleep"); 4068 4069 #if 0 4070 // don't close serial port during sleep 4071 4072 // close low-level device 4073 hci_stack->hci_transport->close(hci_stack->config); 4074 #endif 4075 4076 // sleep mode 4077 if (hci_stack->control && hci_stack->control->sleep){ 4078 (*hci_stack->control->sleep)(); 4079 } 4080 4081 hci_stack->state = HCI_STATE_SLEEPING; 4082 } 4083 4084 static int hci_power_control_wake(void){ 4085 4086 log_info("hci_power_control_wake"); 4087 4088 // wake on 4089 if (hci_stack->control && hci_stack->control->wake){ 4090 (*hci_stack->control->wake)(); 4091 } 4092 4093 #if 0 4094 // open low-level device 4095 int err = hci_stack->hci_transport->open(hci_stack->config); 4096 if (err){ 4097 log_error( "HCI_INIT failed, turning Bluetooth off again"); 4098 if (hci_stack->control && hci_stack->control->off){ 4099 (*hci_stack->control->off)(); 4100 } 4101 hci_emit_hci_open_failed(); 4102 return err; 4103 } 4104 #endif 4105 4106 return 0; 4107 } 4108 4109 static void hci_power_transition_to_initializing(void){ 4110 // set up state machine 4111 hci_stack->num_cmd_packets = 1; // assume that one cmd can be sent 4112 hci_stack->hci_packet_buffer_reserved = false; 4113 hci_stack->state = HCI_STATE_INITIALIZING; 4114 hci_stack->substate = HCI_INIT_SEND_RESET; 4115 } 4116 4117 // returns error 4118 static int hci_power_control_state_off(HCI_POWER_MODE power_mode){ 4119 int err; 4120 switch (power_mode){ 4121 case HCI_POWER_ON: 4122 err = hci_power_control_on(); 4123 if (err != 0) { 4124 log_error("hci_power_control_on() error %d", err); 4125 return err; 4126 } 4127 hci_power_transition_to_initializing(); 4128 break; 4129 case HCI_POWER_OFF: 4130 // do nothing 4131 break; 4132 case HCI_POWER_SLEEP: 4133 // do nothing (with SLEEP == OFF) 4134 break; 4135 default: 4136 btstack_assert(false); 4137 break; 4138 } 4139 return ERROR_CODE_SUCCESS; 4140 } 4141 4142 static int hci_power_control_state_initializing(HCI_POWER_MODE power_mode){ 4143 switch (power_mode){ 4144 case HCI_POWER_ON: 4145 // do nothing 4146 break; 4147 case HCI_POWER_OFF: 4148 // no connections yet, just turn it off 4149 hci_power_control_off(); 4150 break; 4151 case HCI_POWER_SLEEP: 4152 // no connections yet, just turn it off 4153 hci_power_control_sleep(); 4154 break; 4155 default: 4156 btstack_assert(false); 4157 break; 4158 } 4159 return ERROR_CODE_SUCCESS; 4160 } 4161 4162 static int hci_power_control_state_working(HCI_POWER_MODE power_mode) { 4163 switch (power_mode){ 4164 case HCI_POWER_ON: 4165 // do nothing 4166 break; 4167 case HCI_POWER_OFF: 4168 // see hci_run 4169 hci_stack->state = HCI_STATE_HALTING; 4170 hci_stack->substate = HCI_HALTING_DISCONNECT_ALL_NO_TIMER; 4171 // setup watchdog timer for disconnect - only triggers if Controller does not respond anymore 4172 btstack_run_loop_set_timer(&hci_stack->timeout, 1000); 4173 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_halting_timeout_handler); 4174 btstack_run_loop_add_timer(&hci_stack->timeout); 4175 break; 4176 case HCI_POWER_SLEEP: 4177 // see hci_run 4178 hci_stack->state = HCI_STATE_FALLING_ASLEEP; 4179 hci_stack->substate = HCI_FALLING_ASLEEP_DISCONNECT; 4180 break; 4181 default: 4182 btstack_assert(false); 4183 break; 4184 } 4185 return ERROR_CODE_SUCCESS; 4186 } 4187 4188 static int hci_power_control_state_halting(HCI_POWER_MODE power_mode) { 4189 switch (power_mode){ 4190 case HCI_POWER_ON: 4191 hci_power_transition_to_initializing(); 4192 break; 4193 case HCI_POWER_OFF: 4194 // do nothing 4195 break; 4196 case HCI_POWER_SLEEP: 4197 // see hci_run 4198 hci_stack->state = HCI_STATE_FALLING_ASLEEP; 4199 hci_stack->substate = HCI_FALLING_ASLEEP_DISCONNECT; 4200 break; 4201 default: 4202 btstack_assert(false); 4203 break; 4204 } 4205 return ERROR_CODE_SUCCESS; 4206 } 4207 4208 static int hci_power_control_state_falling_asleep(HCI_POWER_MODE power_mode) { 4209 switch (power_mode){ 4210 case HCI_POWER_ON: 4211 hci_power_transition_to_initializing(); 4212 break; 4213 case HCI_POWER_OFF: 4214 // see hci_run 4215 hci_stack->state = HCI_STATE_HALTING; 4216 hci_stack->substate = HCI_HALTING_DISCONNECT_ALL_NO_TIMER; 4217 break; 4218 case HCI_POWER_SLEEP: 4219 // do nothing 4220 break; 4221 default: 4222 btstack_assert(false); 4223 break; 4224 } 4225 return ERROR_CODE_SUCCESS; 4226 } 4227 4228 static int hci_power_control_state_sleeping(HCI_POWER_MODE power_mode) { 4229 int err; 4230 switch (power_mode){ 4231 case HCI_POWER_ON: 4232 err = hci_power_control_wake(); 4233 if (err) return err; 4234 hci_power_transition_to_initializing(); 4235 break; 4236 case HCI_POWER_OFF: 4237 hci_stack->state = HCI_STATE_HALTING; 4238 hci_stack->substate = HCI_HALTING_DISCONNECT_ALL_NO_TIMER; 4239 break; 4240 case HCI_POWER_SLEEP: 4241 // do nothing 4242 break; 4243 default: 4244 btstack_assert(false); 4245 break; 4246 } 4247 return ERROR_CODE_SUCCESS; 4248 } 4249 4250 int hci_power_control(HCI_POWER_MODE power_mode){ 4251 log_info("hci_power_control: %d, current mode %u", power_mode, hci_stack->state); 4252 int err = 0; 4253 switch (hci_stack->state){ 4254 case HCI_STATE_OFF: 4255 err = hci_power_control_state_off(power_mode); 4256 break; 4257 case HCI_STATE_INITIALIZING: 4258 err = hci_power_control_state_initializing(power_mode); 4259 break; 4260 case HCI_STATE_WORKING: 4261 err = hci_power_control_state_working(power_mode); 4262 break; 4263 case HCI_STATE_HALTING: 4264 err = hci_power_control_state_halting(power_mode); 4265 break; 4266 case HCI_STATE_FALLING_ASLEEP: 4267 err = hci_power_control_state_falling_asleep(power_mode); 4268 break; 4269 case HCI_STATE_SLEEPING: 4270 err = hci_power_control_state_sleeping(power_mode); 4271 break; 4272 default: 4273 btstack_assert(false); 4274 break; 4275 } 4276 if (err != 0){ 4277 return err; 4278 } 4279 4280 // create internal event 4281 hci_emit_state(); 4282 4283 // trigger next/first action 4284 hci_run(); 4285 4286 return 0; 4287 } 4288 4289 4290 static void hci_halting_run(void) { 4291 4292 log_info("HCI_STATE_HALTING, substate %x\n", hci_stack->substate); 4293 4294 hci_connection_t *connection; 4295 4296 switch (hci_stack->substate) { 4297 case HCI_HALTING_DISCONNECT_ALL_NO_TIMER: 4298 case HCI_HALTING_DISCONNECT_ALL_TIMER: 4299 4300 #ifdef ENABLE_BLE 4301 #ifdef ENABLE_LE_CENTRAL 4302 hci_whitelist_free(); 4303 #endif 4304 #endif 4305 // close all open connections 4306 connection = (hci_connection_t *) hci_stack->connections; 4307 if (connection) { 4308 hci_con_handle_t con_handle = (uint16_t) connection->con_handle; 4309 if (!hci_can_send_command_packet_now()) return; 4310 4311 // check state 4312 if (connection->state == SENT_DISCONNECT) return; 4313 connection->state = SENT_DISCONNECT; 4314 4315 log_info("HCI_STATE_HALTING, connection %p, handle %u", connection, con_handle); 4316 4317 // cancel all l2cap connections right away instead of waiting for disconnection complete event ... 4318 hci_emit_disconnection_complete(con_handle, 0x16); // terminated by local host 4319 4320 // ... which would be ignored anyway as we shutdown (free) the connection now 4321 hci_shutdown_connection(connection); 4322 4323 // finally, send the disconnect command 4324 hci_send_cmd(&hci_disconnect, con_handle, ERROR_CODE_REMOTE_USER_TERMINATED_CONNECTION); 4325 return; 4326 } 4327 4328 btstack_run_loop_remove_timer(&hci_stack->timeout); 4329 4330 if (hci_stack->substate == HCI_HALTING_DISCONNECT_ALL_TIMER) { 4331 // no connections left, wait a bit to assert that btstack_cyrpto isn't waiting for an HCI event 4332 log_info("HCI_STATE_HALTING: wait 50 ms"); 4333 hci_stack->substate = HCI_HALTING_W4_TIMER; 4334 btstack_run_loop_set_timer(&hci_stack->timeout, 50); 4335 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_halting_timeout_handler); 4336 btstack_run_loop_add_timer(&hci_stack->timeout); 4337 break; 4338 } 4339 4340 /* fall through */ 4341 4342 case HCI_HALTING_CLOSE: 4343 // close left over connections (that had not been properly closed before) 4344 hci_discard_connections(); 4345 4346 log_info("HCI_STATE_HALTING, calling off"); 4347 4348 // switch mode 4349 hci_power_control_off(); 4350 4351 log_info("HCI_STATE_HALTING, emitting state"); 4352 hci_emit_state(); 4353 log_info("HCI_STATE_HALTING, done"); 4354 break; 4355 4356 case HCI_HALTING_W4_TIMER: 4357 // keep waiting 4358 4359 break; 4360 default: 4361 break; 4362 } 4363 }; 4364 4365 static void hci_falling_asleep_run(void){ 4366 hci_connection_t * connection; 4367 switch(hci_stack->substate) { 4368 case HCI_FALLING_ASLEEP_DISCONNECT: 4369 log_info("HCI_STATE_FALLING_ASLEEP"); 4370 // close all open connections 4371 connection = (hci_connection_t *) hci_stack->connections; 4372 if (connection){ 4373 4374 // send disconnect 4375 if (!hci_can_send_command_packet_now()) return; 4376 4377 log_info("HCI_STATE_FALLING_ASLEEP, connection %p, handle %u", connection, (uint16_t)connection->con_handle); 4378 hci_send_cmd(&hci_disconnect, connection->con_handle, ERROR_CODE_REMOTE_USER_TERMINATED_CONNECTION); 4379 4380 // send disconnected event right away - causes higher layer connections to get closed, too. 4381 hci_shutdown_connection(connection); 4382 return; 4383 } 4384 4385 if (hci_classic_supported()){ 4386 // disable page and inquiry scan 4387 if (!hci_can_send_command_packet_now()) return; 4388 4389 log_info("HCI_STATE_HALTING, disabling inq scans"); 4390 hci_send_cmd(&hci_write_scan_enable, hci_stack->connectable << 1); // drop inquiry scan but keep page scan 4391 4392 // continue in next sub state 4393 hci_stack->substate = HCI_FALLING_ASLEEP_W4_WRITE_SCAN_ENABLE; 4394 break; 4395 } 4396 4397 /* fall through */ 4398 4399 case HCI_FALLING_ASLEEP_COMPLETE: 4400 log_info("HCI_STATE_HALTING, calling sleep"); 4401 // switch mode 4402 hci_power_control_sleep(); // changes hci_stack->state to SLEEP 4403 hci_emit_state(); 4404 break; 4405 4406 default: 4407 break; 4408 } 4409 } 4410 4411 #ifdef ENABLE_CLASSIC 4412 4413 static void hci_update_scan_enable(void){ 4414 // 2 = page scan, 1 = inq scan 4415 hci_stack->new_scan_enable_value = (hci_stack->connectable << 1) | hci_stack->discoverable; 4416 hci_stack->gap_tasks_classic |= GAP_TASK_WRITE_SCAN_ENABLE; 4417 hci_run(); 4418 } 4419 4420 void gap_discoverable_control(uint8_t enable){ 4421 if (enable) enable = 1; // normalize argument 4422 4423 if (hci_stack->discoverable == enable){ 4424 hci_emit_discoverable_enabled(hci_stack->discoverable); 4425 return; 4426 } 4427 4428 hci_stack->discoverable = enable; 4429 hci_update_scan_enable(); 4430 } 4431 4432 void gap_connectable_control(uint8_t enable){ 4433 if (enable) enable = 1; // normalize argument 4434 4435 // don't emit event 4436 if (hci_stack->connectable == enable) return; 4437 4438 hci_stack->connectable = enable; 4439 hci_update_scan_enable(); 4440 } 4441 #endif 4442 4443 void gap_local_bd_addr(bd_addr_t address_buffer){ 4444 (void)memcpy(address_buffer, hci_stack->local_bd_addr, 6); 4445 } 4446 4447 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 4448 static void hci_host_num_completed_packets(void){ 4449 4450 // create packet manually as arrays are not supported and num_commands should not get reduced 4451 hci_reserve_packet_buffer(); 4452 uint8_t * packet = hci_get_outgoing_packet_buffer(); 4453 4454 uint16_t size = 0; 4455 uint16_t num_handles = 0; 4456 packet[size++] = 0x35; 4457 packet[size++] = 0x0c; 4458 size++; // skip param len 4459 size++; // skip num handles 4460 4461 // add { handle, packets } entries 4462 btstack_linked_item_t * it; 4463 for (it = (btstack_linked_item_t *) hci_stack->connections; it ; it = it->next){ 4464 hci_connection_t * connection = (hci_connection_t *) it; 4465 if (connection->num_packets_completed){ 4466 little_endian_store_16(packet, size, connection->con_handle); 4467 size += 2; 4468 little_endian_store_16(packet, size, connection->num_packets_completed); 4469 size += 2; 4470 // 4471 num_handles++; 4472 connection->num_packets_completed = 0; 4473 } 4474 } 4475 4476 packet[2] = size - 3; 4477 packet[3] = num_handles; 4478 4479 hci_stack->host_completed_packets = 0; 4480 4481 hci_dump_packet(HCI_COMMAND_DATA_PACKET, 0, packet, size); 4482 hci_stack->hci_transport->send_packet(HCI_COMMAND_DATA_PACKET, packet, size); 4483 4484 // release packet buffer for synchronous transport implementations 4485 if (hci_transport_synchronous()){ 4486 hci_release_packet_buffer(); 4487 hci_emit_transport_packet_sent(); 4488 } 4489 } 4490 #endif 4491 4492 static void hci_halting_timeout_handler(btstack_timer_source_t * ds){ 4493 UNUSED(ds); 4494 hci_stack->substate = HCI_HALTING_CLOSE; 4495 // allow packet handlers to defer final shutdown 4496 hci_emit_state(); 4497 hci_run(); 4498 } 4499 4500 static bool hci_run_acl_fragments(void){ 4501 if (hci_stack->acl_fragmentation_total_size > 0u) { 4502 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(hci_stack->hci_packet_buffer); 4503 hci_connection_t *connection = hci_connection_for_handle(con_handle); 4504 if (connection) { 4505 if (hci_can_send_prepared_acl_packet_now(con_handle)){ 4506 hci_send_acl_packet_fragments(connection); 4507 return true; 4508 } 4509 } else { 4510 // connection gone -> discard further fragments 4511 log_info("hci_run: fragmented ACL packet no connection -> discard fragment"); 4512 hci_stack->acl_fragmentation_total_size = 0; 4513 hci_stack->acl_fragmentation_pos = 0; 4514 } 4515 } 4516 return false; 4517 } 4518 4519 #ifdef ENABLE_CLASSIC 4520 static bool hci_run_general_gap_classic(void){ 4521 4522 // assert stack is working and classic is active 4523 if (hci_classic_supported() == false) return false; 4524 if (hci_stack->state != HCI_STATE_WORKING) return false; 4525 4526 // decline incoming connections 4527 if (hci_stack->decline_reason){ 4528 uint8_t reason = hci_stack->decline_reason; 4529 hci_stack->decline_reason = 0; 4530 hci_send_cmd(&hci_reject_connection_request, hci_stack->decline_addr, reason); 4531 return true; 4532 } 4533 4534 if (hci_stack->gap_tasks_classic != 0){ 4535 hci_run_gap_tasks_classic(); 4536 return true; 4537 } 4538 4539 // start/stop inquiry 4540 if ((hci_stack->inquiry_state >= GAP_INQUIRY_DURATION_MIN) && (hci_stack->inquiry_state <= GAP_INQUIRY_DURATION_MAX)){ 4541 uint8_t duration = hci_stack->inquiry_state; 4542 hci_stack->inquiry_state = GAP_INQUIRY_STATE_W4_ACTIVE; 4543 hci_send_cmd(&hci_inquiry, hci_stack->inquiry_lap, duration, 0); 4544 return true; 4545 } 4546 if (hci_stack->inquiry_state == GAP_INQUIRY_STATE_W2_CANCEL){ 4547 hci_stack->inquiry_state = GAP_INQUIRY_STATE_W4_CANCELLED; 4548 hci_send_cmd(&hci_inquiry_cancel); 4549 return true; 4550 } 4551 // remote name request 4552 if (hci_stack->remote_name_state == GAP_REMOTE_NAME_STATE_W2_SEND){ 4553 hci_stack->remote_name_state = GAP_REMOTE_NAME_STATE_W4_COMPLETE; 4554 hci_send_cmd(&hci_remote_name_request, hci_stack->remote_name_addr, 4555 hci_stack->remote_name_page_scan_repetition_mode, 0, hci_stack->remote_name_clock_offset); 4556 return true; 4557 } 4558 #ifdef ENABLE_CLASSIC_PAIRING_OOB 4559 // Local OOB data 4560 if (hci_stack->classic_read_local_oob_data){ 4561 hci_stack->classic_read_local_oob_data = false; 4562 if (hci_command_supported(SUPPORTED_HCI_COMMAND_READ_LOCAL_OOB_EXTENDED_DATA_COMMAND)){ 4563 hci_send_cmd(&hci_read_local_extended_oob_data); 4564 } else { 4565 hci_send_cmd(&hci_read_local_oob_data); 4566 } 4567 } 4568 #endif 4569 // pairing 4570 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE){ 4571 uint8_t state = hci_stack->gap_pairing_state; 4572 uint8_t pin_code[16]; 4573 switch (state){ 4574 case GAP_PAIRING_STATE_SEND_PIN: 4575 hci_stack->gap_pairing_state = GAP_PAIRING_STATE_IDLE; 4576 memset(pin_code, 0, 16); 4577 memcpy(pin_code, hci_stack->gap_pairing_input.gap_pairing_pin, hci_stack->gap_pairing_pin_len); 4578 hci_send_cmd(&hci_pin_code_request_reply, hci_stack->gap_pairing_addr, hci_stack->gap_pairing_pin_len, pin_code); 4579 break; 4580 case GAP_PAIRING_STATE_SEND_PIN_NEGATIVE: 4581 hci_stack->gap_pairing_state = GAP_PAIRING_STATE_WAIT_FOR_COMMAND_COMPLETE; 4582 hci_send_cmd(&hci_pin_code_request_negative_reply, hci_stack->gap_pairing_addr); 4583 break; 4584 case GAP_PAIRING_STATE_SEND_PASSKEY: 4585 hci_stack->gap_pairing_state = GAP_PAIRING_STATE_IDLE; 4586 hci_send_cmd(&hci_user_passkey_request_reply, hci_stack->gap_pairing_addr, hci_stack->gap_pairing_input.gap_pairing_passkey); 4587 break; 4588 case GAP_PAIRING_STATE_SEND_PASSKEY_NEGATIVE: 4589 hci_stack->gap_pairing_state = GAP_PAIRING_STATE_WAIT_FOR_COMMAND_COMPLETE; 4590 hci_send_cmd(&hci_user_passkey_request_negative_reply, hci_stack->gap_pairing_addr); 4591 break; 4592 case GAP_PAIRING_STATE_SEND_CONFIRMATION: 4593 hci_stack->gap_pairing_state = GAP_PAIRING_STATE_IDLE; 4594 hci_send_cmd(&hci_user_confirmation_request_reply, hci_stack->gap_pairing_addr); 4595 break; 4596 case GAP_PAIRING_STATE_SEND_CONFIRMATION_NEGATIVE: 4597 hci_stack->gap_pairing_state = GAP_PAIRING_STATE_WAIT_FOR_COMMAND_COMPLETE; 4598 hci_send_cmd(&hci_user_confirmation_request_negative_reply, hci_stack->gap_pairing_addr); 4599 break; 4600 default: 4601 break; 4602 } 4603 return true; 4604 } 4605 return false; 4606 } 4607 #endif 4608 4609 #ifdef ENABLE_BLE 4610 4611 #ifdef ENABLE_LE_PERIPHERAL 4612 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 4613 uint8_t hci_le_extended_advertising_operation_for_chunk(uint16_t pos, uint16_t len){ 4614 uint8_t operation = 0; 4615 if (pos == 0){ 4616 // first fragment or complete data 4617 operation |= 1; 4618 } 4619 if (pos + LE_EXTENDED_ADVERTISING_MAX_CHUNK_LEN >= len){ 4620 // last fragment or complete data 4621 operation |= 2; 4622 } 4623 return operation; 4624 } 4625 #endif 4626 #endif 4627 4628 static bool hci_run_general_gap_le(void){ 4629 4630 // Phase 1: collect what to stop 4631 4632 bool scanning_stop = false; 4633 bool connecting_stop = false; 4634 bool advertising_stop = false; 4635 4636 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 4637 le_advertising_set_t * advertising_stop_set = NULL; 4638 #endif 4639 4640 #ifndef ENABLE_LE_CENTRAL 4641 UNUSED(scanning_stop); 4642 UNUSED(connecting_stop); 4643 #endif 4644 #ifndef ENABLE_LE_PERIPHERAL 4645 UNUSED(advertising_stop); 4646 #endif 4647 4648 // check if own address changes 4649 bool random_address_change = (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_ADDRESS) != 0; 4650 4651 // check if whitelist needs modification 4652 bool whitelist_modification_pending = false; 4653 btstack_linked_list_iterator_t lit; 4654 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 4655 while (btstack_linked_list_iterator_has_next(&lit)){ 4656 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&lit); 4657 if (entry->state & (LE_WHITELIST_REMOVE_FROM_CONTROLLER | LE_WHITELIST_ADD_TO_CONTROLLER)){ 4658 whitelist_modification_pending = true; 4659 break; 4660 } 4661 } 4662 // check if resolving list needs modification 4663 bool resolving_list_modification_pending = false; 4664 #ifdef ENABLE_LE_PRIVACY_ADDRESS_RESOLUTION 4665 4666 bool resolving_list_supported = hci_command_supported(SUPPORTED_HCI_COMMAND_LE_SET_ADDRESS_RESOLUTION_ENABLE); 4667 if (resolving_list_supported && hci_stack->le_resolving_list_state != LE_RESOLVING_LIST_DONE){ 4668 resolving_list_modification_pending = true; 4669 } 4670 #endif 4671 4672 #ifdef ENABLE_LE_CENTRAL 4673 // scanning control 4674 if (hci_stack->le_scanning_active) { 4675 // stop if: 4676 // - parameter change required 4677 // - it's disabled 4678 // - whitelist change required but used for scanning 4679 // - resolving list modified 4680 // - own address changes 4681 bool scanning_uses_whitelist = (hci_stack->le_scan_filter_policy & 1) == 1; 4682 if ((hci_stack->le_scanning_param_update) || 4683 !hci_stack->le_scanning_enabled || 4684 scanning_uses_whitelist || 4685 resolving_list_modification_pending || 4686 random_address_change){ 4687 4688 scanning_stop = true; 4689 } 4690 } 4691 #endif 4692 4693 #ifdef ENABLE_LE_CENTRAL 4694 // connecting control 4695 bool connecting_with_whitelist; 4696 switch (hci_stack->le_connecting_state){ 4697 case LE_CONNECTING_DIRECT: 4698 case LE_CONNECTING_WHITELIST: 4699 // stop connecting if: 4700 // - connecting uses white and whitelist modification pending 4701 // - if it got disabled 4702 // - resolving list modified 4703 // - own address changes 4704 connecting_with_whitelist = hci_stack->le_connecting_state == LE_CONNECTING_WHITELIST; 4705 if ((connecting_with_whitelist && whitelist_modification_pending) || 4706 (hci_stack->le_connecting_request == LE_CONNECTING_IDLE) || 4707 resolving_list_modification_pending || 4708 random_address_change) { 4709 4710 connecting_stop = true; 4711 } 4712 break; 4713 default: 4714 break; 4715 } 4716 #endif 4717 4718 #ifdef ENABLE_LE_PERIPHERAL 4719 // le advertisement control 4720 if ((hci_stack->le_advertisements_state & LE_ADVERTISEMENT_STATE_ACTIVE) != 0){ 4721 // stop if: 4722 // - parameter change required 4723 // - random address used in advertising and changes 4724 // - it's disabled 4725 // - whitelist change required but used for advertisement filter policy 4726 // - resolving list modified 4727 // - own address changes 4728 bool advertising_uses_whitelist = hci_stack->le_advertisements_filter_policy != 0; 4729 bool advertising_uses_random_address = hci_stack->le_own_addr_type != BD_ADDR_TYPE_LE_PUBLIC; 4730 bool advertising_change = (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_PARAMS) != 0; 4731 if (advertising_change || 4732 (advertising_uses_random_address && random_address_change) || 4733 (hci_stack->le_advertisements_enabled_for_current_roles == 0) || 4734 (advertising_uses_whitelist && whitelist_modification_pending) || 4735 resolving_list_modification_pending || 4736 random_address_change) { 4737 4738 advertising_stop = true; 4739 } 4740 } 4741 4742 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 4743 if (hci_extended_advertising_supported() && (advertising_stop == false)){ 4744 btstack_linked_list_iterator_t it; 4745 btstack_linked_list_iterator_init(&it, &hci_stack->le_advertising_sets); 4746 while (btstack_linked_list_iterator_has_next(&it)){ 4747 le_advertising_set_t * advertising_set = (le_advertising_set_t*) btstack_linked_list_iterator_next(&it); 4748 if ((advertising_set->state & LE_ADVERTISEMENT_STATE_ACTIVE) == 0) continue; 4749 // stop if: 4750 // - parameter change required 4751 // - random address used in connectable advertising and changes 4752 // - it's disabled 4753 // - whitelist change required but used for advertisement filter policy 4754 // - resolving list modified 4755 // - own address changes 4756 // - advertisement set will be removed 4757 bool advertising_uses_whitelist = advertising_set->extended_params.advertising_filter_policy != 0; 4758 bool advertising_connectable = (advertising_set->extended_params.advertising_event_properties & 1) != 0; 4759 bool advertising_uses_random_address = (advertising_set->extended_params.own_address_type != BD_ADDR_TYPE_LE_PUBLIC) && advertising_connectable; 4760 bool advertising_parameter_change = (advertising_set->tasks & LE_ADVERTISEMENT_TASKS_SET_PARAMS) != 0; 4761 bool advertising_enabled = (advertising_set->state & LE_ADVERTISEMENT_STATE_ENABLED) != 0; 4762 bool advertising_set_random_address_change = (advertising_set->tasks & LE_ADVERTISEMENT_TASKS_SET_ADDRESS) != 0; 4763 bool advertising_set_will_be_removed = (advertising_set->state & LE_ADVERTISEMENT_TASKS_REMOVE_SET) != 0; 4764 if (advertising_parameter_change || 4765 (advertising_uses_random_address && advertising_set_random_address_change) || 4766 (advertising_enabled == false) || 4767 (advertising_uses_whitelist && whitelist_modification_pending) || 4768 resolving_list_modification_pending || 4769 advertising_set_will_be_removed) { 4770 4771 advertising_stop = true; 4772 advertising_stop_set = advertising_set; 4773 break; 4774 } 4775 } 4776 } 4777 #endif 4778 4779 #endif 4780 4781 4782 // Phase 2: stop everything that should be off during modifications 4783 4784 #ifdef ENABLE_LE_CENTRAL 4785 if (scanning_stop){ 4786 hci_stack->le_scanning_active = false; 4787 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 4788 if (hci_extended_advertising_supported()) { 4789 hci_send_cmd(&hci_le_set_extended_scan_enable, 0, 0, 0, 0); 4790 } else 4791 #endif 4792 { 4793 hci_send_cmd(&hci_le_set_scan_enable, 0, 0); 4794 } 4795 return true; 4796 } 4797 #endif 4798 4799 #ifdef ENABLE_LE_CENTRAL 4800 if (connecting_stop){ 4801 hci_send_cmd(&hci_le_create_connection_cancel); 4802 return true; 4803 } 4804 #endif 4805 4806 #ifdef ENABLE_LE_PERIPHERAL 4807 if (advertising_stop){ 4808 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 4809 if (hci_extended_advertising_supported()) { 4810 uint8_t advertising_stop_handle; 4811 if (advertising_stop_set != NULL){ 4812 advertising_stop_handle = advertising_stop_set->advertising_handle; 4813 advertising_stop_set->state &= ~LE_ADVERTISEMENT_STATE_ACTIVE; 4814 } else { 4815 advertising_stop_handle = 0; 4816 hci_stack->le_advertisements_state &= ~LE_ADVERTISEMENT_STATE_ACTIVE; 4817 } 4818 const uint8_t advertising_handles[] = { advertising_stop_handle }; 4819 const uint16_t durations[] = { 0 }; 4820 const uint16_t max_events[] = { 0 }; 4821 hci_send_cmd(&hci_le_set_extended_advertising_enable, 0, 1, advertising_handles, durations, max_events); 4822 } else 4823 #endif 4824 { 4825 hci_stack->le_advertisements_state &= ~LE_ADVERTISEMENT_STATE_ACTIVE; 4826 hci_send_cmd(&hci_le_set_advertise_enable, 0); 4827 } 4828 return true; 4829 } 4830 #endif 4831 4832 // Phase 3: modify 4833 4834 if (random_address_change){ 4835 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_SET_ADDRESS; 4836 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 4837 if (hci_extended_advertising_supported()) { 4838 hci_send_cmd(&hci_le_set_advertising_set_random_address, 0, hci_stack->le_random_address); 4839 } 4840 #endif 4841 { 4842 hci_send_cmd(&hci_le_set_random_address, hci_stack->le_random_address); 4843 } 4844 return true; 4845 } 4846 4847 #ifdef ENABLE_LE_CENTRAL 4848 if (hci_stack->le_scanning_param_update){ 4849 hci_stack->le_scanning_param_update = false; 4850 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 4851 if (hci_extended_advertising_supported()){ 4852 // prepare arrays for all PHYs 4853 uint8_t scan_types[1] = { hci_stack->le_scan_type }; 4854 uint16_t scan_intervals[1] = { hci_stack->le_scan_interval }; 4855 uint16_t scan_windows[1] = { hci_stack->le_scan_window }; 4856 uint8_t scanning_phys = 1; // LE 1M PHY 4857 hci_send_cmd(&hci_le_set_extended_scan_parameters, hci_stack->le_own_addr_type, 4858 hci_stack->le_scan_filter_policy, scanning_phys, scan_types, scan_intervals, scan_windows); 4859 } else 4860 #endif 4861 { 4862 hci_send_cmd(&hci_le_set_scan_parameters, hci_stack->le_scan_type, hci_stack->le_scan_interval, hci_stack->le_scan_window, 4863 hci_stack->le_own_addr_type, hci_stack->le_scan_filter_policy); 4864 } 4865 return true; 4866 } 4867 #endif 4868 4869 #ifdef ENABLE_LE_PERIPHERAL 4870 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_PARAMS){ 4871 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_SET_PARAMS; 4872 hci_stack->le_advertisements_own_addr_type = hci_stack->le_own_addr_type; 4873 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 4874 if (hci_extended_advertising_supported()){ 4875 // map advertisment type to advertising event properties 4876 uint16_t adv_event_properties = 0; 4877 const uint16_t mapping[] = { 0b00010011, 0b00010101, 0b00011101, 0b00010010, 0b00010000}; 4878 if (hci_stack->le_advertisements_type < (sizeof(mapping)/sizeof(uint16_t))){ 4879 adv_event_properties = mapping[hci_stack->le_advertisements_type]; 4880 } 4881 hci_stack->le_advertising_set_in_current_command = 0; 4882 hci_send_cmd(&hci_le_set_extended_advertising_parameters, 4883 0, 4884 adv_event_properties, 4885 hci_stack->le_advertisements_interval_min, 4886 hci_stack->le_advertisements_interval_max, 4887 hci_stack->le_advertisements_channel_map, 4888 hci_stack->le_advertisements_own_addr_type, 4889 hci_stack->le_advertisements_direct_address_type, 4890 hci_stack->le_advertisements_direct_address, 4891 hci_stack->le_advertisements_filter_policy, 4892 0x7f, // tx power: no preference 4893 0x01, // primary adv phy: LE 1M 4894 0, // secondary adv max skip 4895 0, // secondary adv phy 4896 0, // adv sid 4897 0 // scan request notification 4898 ); 4899 } 4900 #endif 4901 { 4902 hci_send_cmd(&hci_le_set_advertising_parameters, 4903 hci_stack->le_advertisements_interval_min, 4904 hci_stack->le_advertisements_interval_max, 4905 hci_stack->le_advertisements_type, 4906 hci_stack->le_advertisements_own_addr_type, 4907 hci_stack->le_advertisements_direct_address_type, 4908 hci_stack->le_advertisements_direct_address, 4909 hci_stack->le_advertisements_channel_map, 4910 hci_stack->le_advertisements_filter_policy); 4911 } 4912 return true; 4913 } 4914 4915 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_ADV_DATA){ 4916 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_SET_ADV_DATA; 4917 uint8_t adv_data_clean[31]; 4918 memset(adv_data_clean, 0, sizeof(adv_data_clean)); 4919 (void)memcpy(adv_data_clean, hci_stack->le_advertisements_data, 4920 hci_stack->le_advertisements_data_len); 4921 btstack_replace_bd_addr_placeholder(adv_data_clean, hci_stack->le_advertisements_data_len, hci_stack->local_bd_addr); 4922 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 4923 if (hci_extended_advertising_supported()){ 4924 hci_stack->le_advertising_set_in_current_command = 0; 4925 hci_send_cmd(&hci_le_set_extended_advertising_data, 0, 0x03, 0x01, hci_stack->le_advertisements_data_len, adv_data_clean); 4926 } else 4927 #endif 4928 { 4929 hci_send_cmd(&hci_le_set_advertising_data, hci_stack->le_advertisements_data_len, adv_data_clean); 4930 } 4931 return true; 4932 } 4933 4934 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA){ 4935 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA; 4936 uint8_t scan_data_clean[31]; 4937 memset(scan_data_clean, 0, sizeof(scan_data_clean)); 4938 (void)memcpy(scan_data_clean, hci_stack->le_scan_response_data, 4939 hci_stack->le_scan_response_data_len); 4940 btstack_replace_bd_addr_placeholder(scan_data_clean, hci_stack->le_scan_response_data_len, hci_stack->local_bd_addr); 4941 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 4942 if (hci_extended_advertising_supported()){ 4943 hci_stack->le_advertising_set_in_current_command = 0; 4944 hci_send_cmd(&hci_le_set_extended_scan_response_data, 0, 0x03, 0x01, hci_stack->le_scan_response_data_len, scan_data_clean); 4945 } else 4946 #endif 4947 { 4948 hci_send_cmd(&hci_le_set_scan_response_data, hci_stack->le_scan_response_data_len, scan_data_clean); 4949 } 4950 return true; 4951 } 4952 4953 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 4954 if (hci_extended_advertising_supported()) { 4955 btstack_linked_list_iterator_t it; 4956 btstack_linked_list_iterator_init(&it, &hci_stack->le_advertising_sets); 4957 while (btstack_linked_list_iterator_has_next(&it)){ 4958 le_advertising_set_t * advertising_set = (le_advertising_set_t*) btstack_linked_list_iterator_next(&it); 4959 if ((advertising_set->tasks & LE_ADVERTISEMENT_TASKS_REMOVE_SET) != 0) { 4960 advertising_set->tasks &= ~LE_ADVERTISEMENT_TASKS_REMOVE_SET; 4961 hci_stack->le_advertising_set_in_current_command = advertising_set->advertising_handle; 4962 hci_send_cmd(&hci_le_remove_advertising_set, advertising_set->advertising_handle); 4963 return true; 4964 } 4965 if ((advertising_set->tasks & LE_ADVERTISEMENT_TASKS_SET_ADDRESS) != 0){ 4966 advertising_set->tasks &= ~LE_ADVERTISEMENT_TASKS_SET_ADDRESS; 4967 hci_send_cmd(&hci_le_set_advertising_set_random_address, advertising_set->advertising_handle, advertising_set->random_address); 4968 return true; 4969 } 4970 if ((advertising_set->tasks & LE_ADVERTISEMENT_TASKS_SET_PARAMS) != 0){ 4971 advertising_set->tasks &= ~LE_ADVERTISEMENT_TASKS_SET_PARAMS; 4972 hci_stack->le_advertising_set_in_current_command = advertising_set->advertising_handle; 4973 hci_send_cmd(&hci_le_set_extended_advertising_parameters, 4974 advertising_set->advertising_handle, 4975 advertising_set->extended_params.advertising_event_properties, 4976 advertising_set->extended_params.primary_advertising_interval_min, 4977 advertising_set->extended_params.primary_advertising_interval_max, 4978 advertising_set->extended_params.primary_advertising_channel_map, 4979 advertising_set->extended_params.own_address_type, 4980 advertising_set->extended_params.peer_address_type, 4981 advertising_set->extended_params.peer_address, 4982 advertising_set->extended_params.advertising_filter_policy, 4983 advertising_set->extended_params.advertising_tx_power, 4984 advertising_set->extended_params.primary_advertising_phy, 4985 advertising_set->extended_params.secondary_advertising_max_skip, 4986 advertising_set->extended_params.secondary_advertising_phy, 4987 advertising_set->extended_params.advertising_sid, 4988 advertising_set->extended_params.scan_request_notification_enable 4989 ); 4990 return true; 4991 } 4992 if ((advertising_set->tasks & LE_ADVERTISEMENT_TASKS_SET_ADV_DATA) != 0) { 4993 uint16_t pos = advertising_set->adv_data_pos; 4994 uint8_t operation = hci_le_extended_advertising_operation_for_chunk(pos, advertising_set->adv_data_len); 4995 uint16_t data_to_upload = btstack_min(advertising_set->adv_data_len - pos, LE_EXTENDED_ADVERTISING_MAX_CHUNK_LEN); 4996 if ((operation & 0x02) != 0){ 4997 // last fragment or complete data 4998 operation |= 2; 4999 advertising_set->adv_data_pos = 0; 5000 advertising_set->tasks &= ~LE_ADVERTISEMENT_TASKS_SET_ADV_DATA; 5001 } else { 5002 advertising_set->adv_data_pos += data_to_upload; 5003 } 5004 hci_stack->le_advertising_set_in_current_command = advertising_set->advertising_handle; 5005 hci_send_cmd(&hci_le_set_extended_advertising_data, operation, 0x03, 0x01, data_to_upload, &advertising_set->adv_data[pos]); 5006 return true; 5007 } 5008 if ((advertising_set->tasks & LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA) != 0) { 5009 uint16_t pos = advertising_set->scan_data_pos; 5010 uint8_t operation = hci_le_extended_advertising_operation_for_chunk(pos, advertising_set->scan_data_len); 5011 uint16_t data_to_upload = btstack_min(advertising_set->scan_data_len - pos, LE_EXTENDED_ADVERTISING_MAX_CHUNK_LEN); 5012 if ((operation & 0x02) != 0){ 5013 advertising_set->scan_data_pos = 0; 5014 advertising_set->tasks &= ~LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA; 5015 } else { 5016 advertising_set->scan_data_pos += data_to_upload; 5017 } 5018 hci_stack->le_advertising_set_in_current_command = advertising_set->advertising_handle; 5019 hci_send_cmd(&hci_le_set_extended_scan_response_data, operation, 0x03, 0x01, data_to_upload, &advertising_set->scan_data[pos]); 5020 return true; 5021 } 5022 } 5023 } 5024 #endif 5025 5026 5027 #endif 5028 5029 5030 #ifdef ENABLE_LE_CENTRAL 5031 // if connect with whitelist was active and is not cancelled yet, wait until next time 5032 if (hci_stack->le_connecting_state == LE_CONNECTING_CANCEL) return false; 5033 #endif 5034 5035 // LE Whitelist Management 5036 if (whitelist_modification_pending){ 5037 // add/remove entries 5038 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 5039 while (btstack_linked_list_iterator_has_next(&lit)){ 5040 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&lit); 5041 if (entry->state & LE_WHITELIST_REMOVE_FROM_CONTROLLER){ 5042 entry->state &= ~LE_WHITELIST_REMOVE_FROM_CONTROLLER; 5043 hci_send_cmd(&hci_le_remove_device_from_white_list, entry->address_type, entry->address); 5044 return true; 5045 } 5046 if (entry->state & LE_WHITELIST_ADD_TO_CONTROLLER){ 5047 entry->state &= ~LE_WHITELIST_ADD_TO_CONTROLLER; 5048 entry->state |= LE_WHITELIST_ON_CONTROLLER; 5049 hci_send_cmd(&hci_le_add_device_to_white_list, entry->address_type, entry->address); 5050 return true; 5051 } 5052 if ((entry->state & LE_WHITELIST_ON_CONTROLLER) == 0){ 5053 btstack_linked_list_remove(&hci_stack->le_whitelist, (btstack_linked_item_t *) entry); 5054 btstack_memory_whitelist_entry_free(entry); 5055 } 5056 } 5057 } 5058 5059 #ifdef ENABLE_LE_PRIVACY_ADDRESS_RESOLUTION 5060 // LE Resolving List Management 5061 if (resolving_list_supported) { 5062 uint16_t i; 5063 switch (hci_stack->le_resolving_list_state) { 5064 case LE_RESOLVING_LIST_SEND_ENABLE_ADDRESS_RESOLUTION: 5065 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_READ_SIZE; 5066 hci_send_cmd(&hci_le_set_address_resolution_enabled, 1); 5067 return true; 5068 case LE_RESOLVING_LIST_READ_SIZE: 5069 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_SEND_CLEAR; 5070 hci_send_cmd(&hci_le_read_resolving_list_size); 5071 return true; 5072 case LE_RESOLVING_LIST_SEND_CLEAR: 5073 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_REMOVE_ENTRIES; 5074 (void) memset(hci_stack->le_resolving_list_add_entries, 0xff, 5075 sizeof(hci_stack->le_resolving_list_add_entries)); 5076 (void) memset(hci_stack->le_resolving_list_remove_entries, 0, 5077 sizeof(hci_stack->le_resolving_list_remove_entries)); 5078 hci_send_cmd(&hci_le_clear_resolving_list); 5079 return true; 5080 case LE_RESOLVING_LIST_REMOVE_ENTRIES: 5081 for (i = 0; i < MAX_NUM_RESOLVING_LIST_ENTRIES && i < le_device_db_max_count(); i++) { 5082 uint8_t offset = i >> 3; 5083 uint8_t mask = 1 << (i & 7); 5084 if ((hci_stack->le_resolving_list_remove_entries[offset] & mask) == 0) continue; 5085 hci_stack->le_resolving_list_remove_entries[offset] &= ~mask; 5086 bd_addr_t peer_identity_addreses; 5087 int peer_identity_addr_type = (int) BD_ADDR_TYPE_UNKNOWN; 5088 sm_key_t peer_irk; 5089 le_device_db_info(i, &peer_identity_addr_type, peer_identity_addreses, peer_irk); 5090 if (peer_identity_addr_type == BD_ADDR_TYPE_UNKNOWN) continue; 5091 5092 #ifdef ENABLE_LE_WHITELIST_TOUCH_AFTER_RESOLVING_LIST_UPDATE 5093 // trigger whitelist entry 'update' (work around for controller bug) 5094 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 5095 while (btstack_linked_list_iterator_has_next(&lit)) { 5096 whitelist_entry_t *entry = (whitelist_entry_t *) btstack_linked_list_iterator_next(&lit); 5097 if (entry->address_type != peer_identity_addr_type) continue; 5098 if (memcmp(entry->address, peer_identity_addreses, 6) != 0) continue; 5099 log_info("trigger whitelist update %s", bd_addr_to_str(peer_identity_addreses)); 5100 entry->state |= LE_WHITELIST_REMOVE_FROM_CONTROLLER | LE_WHITELIST_ADD_TO_CONTROLLER; 5101 } 5102 #endif 5103 5104 hci_send_cmd(&hci_le_remove_device_from_resolving_list, peer_identity_addr_type, 5105 peer_identity_addreses); 5106 return true; 5107 } 5108 5109 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_ADD_ENTRIES; 5110 5111 /* fall through */ 5112 5113 case LE_RESOLVING_LIST_ADD_ENTRIES: 5114 for (i = 0; i < MAX_NUM_RESOLVING_LIST_ENTRIES && i < le_device_db_max_count(); i++) { 5115 uint8_t offset = i >> 3; 5116 uint8_t mask = 1 << (i & 7); 5117 if ((hci_stack->le_resolving_list_add_entries[offset] & mask) == 0) continue; 5118 hci_stack->le_resolving_list_add_entries[offset] &= ~mask; 5119 bd_addr_t peer_identity_addreses; 5120 int peer_identity_addr_type = (int) BD_ADDR_TYPE_UNKNOWN; 5121 sm_key_t peer_irk; 5122 le_device_db_info(i, &peer_identity_addr_type, peer_identity_addreses, peer_irk); 5123 if (peer_identity_addr_type == BD_ADDR_TYPE_UNKNOWN) continue; 5124 const uint8_t *local_irk = gap_get_persistent_irk(); 5125 // command uses format specifier 'P' that stores 16-byte value without flip 5126 uint8_t local_irk_flipped[16]; 5127 uint8_t peer_irk_flipped[16]; 5128 reverse_128(local_irk, local_irk_flipped); 5129 reverse_128(peer_irk, peer_irk_flipped); 5130 hci_send_cmd(&hci_le_add_device_to_resolving_list, peer_identity_addr_type, peer_identity_addreses, 5131 peer_irk_flipped, local_irk_flipped); 5132 return true; 5133 } 5134 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_DONE; 5135 break; 5136 5137 default: 5138 break; 5139 } 5140 } 5141 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_DONE; 5142 #endif 5143 5144 // post-pone all actions until stack is fully working 5145 if (hci_stack->state != HCI_STATE_WORKING) return false; 5146 5147 // advertisements, active scanning, and creating connections requires random address to be set if using private address 5148 if ( (hci_stack->le_own_addr_type != BD_ADDR_TYPE_LE_PUBLIC) && (hci_stack->le_random_address_set == 0u) ) return false; 5149 5150 // Phase 4: restore state 5151 5152 #ifdef ENABLE_LE_CENTRAL 5153 // re-start scanning 5154 if ((hci_stack->le_scanning_enabled && !hci_stack->le_scanning_active)){ 5155 hci_stack->le_scanning_active = true; 5156 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 5157 if (hci_extended_advertising_supported()){ 5158 hci_send_cmd(&hci_le_set_extended_scan_enable, 1, 0, 0, 0); 5159 } else 5160 #endif 5161 { 5162 hci_send_cmd(&hci_le_set_scan_enable, 1, 0); 5163 } 5164 return true; 5165 } 5166 #endif 5167 5168 #ifdef ENABLE_LE_CENTRAL 5169 // re-start connecting 5170 if ( (hci_stack->le_connecting_state == LE_CONNECTING_IDLE) && (hci_stack->le_connecting_request == LE_CONNECTING_WHITELIST)){ 5171 bd_addr_t null_addr; 5172 memset(null_addr, 0, 6); 5173 hci_stack->le_connection_own_addr_type = hci_stack->le_own_addr_type; 5174 hci_get_own_address_for_addr_type(hci_stack->le_connection_own_addr_type, hci_stack->le_connection_own_address); 5175 hci_send_cmd(&hci_le_create_connection, 5176 hci_stack->le_connection_scan_interval, // scan interval: 60 ms 5177 hci_stack->le_connection_scan_window, // scan interval: 30 ms 5178 1, // use whitelist 5179 0, // peer address type 5180 null_addr, // peer bd addr 5181 hci_stack->le_connection_own_addr_type, // our addr type: 5182 hci_stack->le_connection_interval_min, // conn interval min 5183 hci_stack->le_connection_interval_max, // conn interval max 5184 hci_stack->le_connection_latency, // conn latency 5185 hci_stack->le_supervision_timeout, // conn latency 5186 hci_stack->le_minimum_ce_length, // min ce length 5187 hci_stack->le_maximum_ce_length // max ce length 5188 ); 5189 return true; 5190 } 5191 #endif 5192 5193 #ifdef ENABLE_LE_PERIPHERAL 5194 // re-start advertising 5195 if (hci_stack->le_advertisements_enabled_for_current_roles && ((hci_stack->le_advertisements_state & LE_ADVERTISEMENT_STATE_ACTIVE) == 0)){ 5196 // check if advertisements should be enabled given 5197 hci_stack->le_advertisements_state |= LE_ADVERTISEMENT_STATE_ACTIVE; 5198 hci_get_own_address_for_addr_type(hci_stack->le_advertisements_own_addr_type, hci_stack->le_advertisements_own_address); 5199 5200 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 5201 if (hci_extended_advertising_supported()){ 5202 const uint8_t advertising_handles[] = { 0 }; 5203 const uint16_t durations[] = { 0 }; 5204 const uint16_t max_events[] = { 0 }; 5205 hci_send_cmd(&hci_le_set_extended_advertising_enable, 1, 1, advertising_handles, durations, max_events); 5206 } else 5207 #endif 5208 { 5209 hci_send_cmd(&hci_le_set_advertise_enable, 1); 5210 } 5211 return true; 5212 } 5213 5214 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 5215 if (hci_extended_advertising_supported()) { 5216 btstack_linked_list_iterator_t it; 5217 btstack_linked_list_iterator_init(&it, &hci_stack->le_advertising_sets); 5218 while (btstack_linked_list_iterator_has_next(&it)) { 5219 le_advertising_set_t *advertising_set = (le_advertising_set_t *) btstack_linked_list_iterator_next(&it); 5220 if (((advertising_set->state & LE_ADVERTISEMENT_STATE_ENABLED) != 0) && ((advertising_set->state & LE_ADVERTISEMENT_STATE_ACTIVE) == 0)){ 5221 advertising_set->state |= LE_ADVERTISEMENT_STATE_ACTIVE; 5222 const uint8_t advertising_handles[] = { advertising_set->advertising_handle }; 5223 const uint16_t durations[] = { advertising_set->enable_timeout }; 5224 const uint16_t max_events[] = { advertising_set->enable_max_scan_events }; 5225 hci_send_cmd(&hci_le_set_extended_advertising_enable, 1, 1, advertising_handles, durations, max_events); 5226 return true; 5227 } 5228 } 5229 } 5230 #endif 5231 #endif 5232 5233 return false; 5234 } 5235 #endif 5236 5237 static bool hci_run_general_pending_commands(void){ 5238 btstack_linked_item_t * it; 5239 for (it = (btstack_linked_item_t *) hci_stack->connections; it != NULL; it = it->next){ 5240 hci_connection_t * connection = (hci_connection_t *) it; 5241 5242 switch(connection->state){ 5243 case SEND_CREATE_CONNECTION: 5244 switch(connection->address_type){ 5245 #ifdef ENABLE_CLASSIC 5246 case BD_ADDR_TYPE_ACL: 5247 log_info("sending hci_create_connection"); 5248 hci_send_cmd(&hci_create_connection, connection->address, hci_usable_acl_packet_types(), 0, 0, 0, hci_stack->allow_role_switch); 5249 break; 5250 #endif 5251 default: 5252 #ifdef ENABLE_BLE 5253 #ifdef ENABLE_LE_CENTRAL 5254 log_info("sending hci_le_create_connection"); 5255 hci_stack->le_connection_own_addr_type = hci_stack->le_own_addr_type; 5256 hci_get_own_address_for_addr_type(hci_stack->le_connection_own_addr_type, hci_stack->le_connection_own_address); 5257 hci_send_cmd(&hci_le_create_connection, 5258 hci_stack->le_connection_scan_interval, // conn scan interval 5259 hci_stack->le_connection_scan_window, // conn scan windows 5260 0, // don't use whitelist 5261 connection->address_type, // peer address type 5262 connection->address, // peer bd addr 5263 hci_stack->le_connection_own_addr_type, // our addr type: 5264 hci_stack->le_connection_interval_min, // conn interval min 5265 hci_stack->le_connection_interval_max, // conn interval max 5266 hci_stack->le_connection_latency, // conn latency 5267 hci_stack->le_supervision_timeout, // conn latency 5268 hci_stack->le_minimum_ce_length, // min ce length 5269 hci_stack->le_maximum_ce_length // max ce length 5270 ); 5271 connection->state = SENT_CREATE_CONNECTION; 5272 #endif 5273 #endif 5274 break; 5275 } 5276 return true; 5277 5278 #ifdef ENABLE_CLASSIC 5279 case RECEIVED_CONNECTION_REQUEST: 5280 connection->role = HCI_ROLE_SLAVE; 5281 if (connection->address_type == BD_ADDR_TYPE_ACL){ 5282 log_info("sending hci_accept_connection_request"); 5283 connection->state = ACCEPTED_CONNECTION_REQUEST; 5284 hci_send_cmd(&hci_accept_connection_request, connection->address, hci_stack->master_slave_policy); 5285 return true; 5286 } 5287 break; 5288 #endif 5289 5290 #ifdef ENABLE_BLE 5291 #ifdef ENABLE_LE_CENTRAL 5292 case SEND_CANCEL_CONNECTION: 5293 connection->state = SENT_CANCEL_CONNECTION; 5294 hci_send_cmd(&hci_le_create_connection_cancel); 5295 return true; 5296 #endif 5297 #endif 5298 case SEND_DISCONNECT: 5299 connection->state = SENT_DISCONNECT; 5300 hci_send_cmd(&hci_disconnect, connection->con_handle, ERROR_CODE_REMOTE_USER_TERMINATED_CONNECTION); 5301 return true; 5302 5303 default: 5304 break; 5305 } 5306 5307 // no further commands if connection is about to get shut down 5308 if (connection->state == SENT_DISCONNECT) continue; 5309 5310 if (connection->authentication_flags & AUTH_FLAG_READ_RSSI){ 5311 connectionClearAuthenticationFlags(connection, AUTH_FLAG_READ_RSSI); 5312 hci_send_cmd(&hci_read_rssi, connection->con_handle); 5313 return true; 5314 } 5315 5316 #ifdef ENABLE_CLASSIC 5317 5318 if (connection->authentication_flags & AUTH_FLAG_WRITE_SUPERVISION_TIMEOUT){ 5319 connectionClearAuthenticationFlags(connection, AUTH_FLAG_WRITE_SUPERVISION_TIMEOUT); 5320 hci_send_cmd(&hci_write_link_supervision_timeout, connection->con_handle, hci_stack->link_supervision_timeout); 5321 return true; 5322 } 5323 5324 // Handling link key request requires remote supported features 5325 if (((connection->authentication_flags & AUTH_FLAG_HANDLE_LINK_KEY_REQUEST) != 0)){ 5326 log_info("responding to link key request, have link key db: %u", hci_stack->link_key_db != NULL); 5327 connectionClearAuthenticationFlags(connection, AUTH_FLAG_HANDLE_LINK_KEY_REQUEST); 5328 5329 bool have_link_key = connection->link_key_type != INVALID_LINK_KEY; 5330 bool security_level_sufficient = have_link_key && (gap_security_level_for_link_key_type(connection->link_key_type) >= connection->requested_security_level); 5331 if (have_link_key && security_level_sufficient){ 5332 hci_send_cmd(&hci_link_key_request_reply, connection->address, &connection->link_key); 5333 } else { 5334 hci_send_cmd(&hci_link_key_request_negative_reply, connection->address); 5335 } 5336 return true; 5337 } 5338 5339 if (connection->authentication_flags & AUTH_FLAG_DENY_PIN_CODE_REQUEST){ 5340 log_info("denying to pin request"); 5341 connectionClearAuthenticationFlags(connection, AUTH_FLAG_DENY_PIN_CODE_REQUEST); 5342 hci_send_cmd(&hci_pin_code_request_negative_reply, connection->address); 5343 return true; 5344 } 5345 5346 // security assessment requires remote features 5347 if ((connection->authentication_flags & AUTH_FLAG_RECV_IO_CAPABILITIES_REQUEST) != 0){ 5348 connectionClearAuthenticationFlags(connection, AUTH_FLAG_RECV_IO_CAPABILITIES_REQUEST); 5349 hci_ssp_assess_security_on_io_cap_request(connection); 5350 // 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 5351 } 5352 5353 if (connection->authentication_flags & AUTH_FLAG_SEND_IO_CAPABILITIES_REPLY){ 5354 connectionClearAuthenticationFlags(connection, AUTH_FLAG_SEND_IO_CAPABILITIES_REPLY); 5355 // set authentication requirements: 5356 // - MITM = ssp_authentication_requirement (USER) | requested_security_level (dynamic) 5357 // - BONDING MODE: dedicated if requested, bondable otherwise. Drop bondable if not set for remote 5358 uint8_t authreq = hci_stack->ssp_authentication_requirement & 1; 5359 if (gap_mitm_protection_required_for_security_level(connection->requested_security_level)){ 5360 authreq |= 1; 5361 } 5362 bool bonding = hci_stack->bondable; 5363 if (connection->authentication_flags & AUTH_FLAG_RECV_IO_CAPABILITIES_RESPONSE){ 5364 // if we have received IO Cap Response, we're in responder role 5365 bool remote_bonding = connection->io_cap_response_auth_req >= SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_DEDICATED_BONDING; 5366 if (bonding && !remote_bonding){ 5367 log_info("Remote not bonding, dropping local flag"); 5368 bonding = false; 5369 } 5370 } 5371 if (bonding){ 5372 if (connection->bonding_flags & BONDING_DEDICATED){ 5373 authreq |= SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_DEDICATED_BONDING; 5374 } else { 5375 authreq |= SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_GENERAL_BONDING; 5376 } 5377 } 5378 uint8_t have_oob_data = 0; 5379 #ifdef ENABLE_CLASSIC_PAIRING_OOB 5380 if (connection->classic_oob_c_192 != NULL){ 5381 have_oob_data |= 1; 5382 } 5383 if (connection->classic_oob_c_256 != NULL){ 5384 have_oob_data |= 2; 5385 } 5386 #endif 5387 hci_send_cmd(&hci_io_capability_request_reply, &connection->address, hci_stack->ssp_io_capability, have_oob_data, authreq); 5388 return true; 5389 } 5390 5391 if (connection->authentication_flags & AUTH_FLAG_SEND_IO_CAPABILITIES_NEGATIVE_REPLY) { 5392 connectionClearAuthenticationFlags(connection, AUTH_FLAG_SEND_IO_CAPABILITIES_NEGATIVE_REPLY); 5393 hci_send_cmd(&hci_io_capability_request_negative_reply, &connection->address, ERROR_CODE_PAIRING_NOT_ALLOWED); 5394 return true; 5395 } 5396 5397 #ifdef ENABLE_CLASSIC_PAIRING_OOB 5398 if (connection->authentication_flags & AUTH_FLAG_SEND_REMOTE_OOB_DATA_REPLY){ 5399 connectionClearAuthenticationFlags(connection, AUTH_FLAG_SEND_REMOTE_OOB_DATA_REPLY); 5400 const uint8_t zero[16] = { 0 }; 5401 const uint8_t * r_192 = zero; 5402 const uint8_t * c_192 = zero; 5403 const uint8_t * r_256 = zero; 5404 const uint8_t * c_256 = zero; 5405 // verify P-256 OOB 5406 if ((connection->classic_oob_c_256 != NULL) && hci_command_supported(SUPPORTED_HCI_COMMAND_REMOTE_OOB_EXTENDED_DATA_REQUEST_REPLY)) { 5407 c_256 = connection->classic_oob_c_256; 5408 if (connection->classic_oob_r_256 != NULL) { 5409 r_256 = connection->classic_oob_r_256; 5410 } 5411 } 5412 // verify P-192 OOB 5413 if ((connection->classic_oob_c_192 != NULL)) { 5414 c_192 = connection->classic_oob_c_192; 5415 if (connection->classic_oob_r_192 != NULL) { 5416 r_192 = connection->classic_oob_r_192; 5417 } 5418 } 5419 5420 // assess security 5421 bool need_level_4 = hci_stack->gap_secure_connections_only_mode || (connection->requested_security_level == LEVEL_4); 5422 bool can_reach_level_4 = hci_remote_sc_enabled(connection) && (c_256 != NULL); 5423 if (need_level_4 && !can_reach_level_4){ 5424 log_info("Level 4 required, but not possible -> abort"); 5425 hci_pairing_complete(connection, ERROR_CODE_INSUFFICIENT_SECURITY); 5426 // send oob negative reply 5427 c_256 = NULL; 5428 c_192 = NULL; 5429 } 5430 5431 // Reply 5432 if (c_256 != zero) { 5433 hci_send_cmd(&hci_remote_oob_extended_data_request_reply, &connection->address, c_192, r_192, c_256, r_256); 5434 } else if (c_192 != zero){ 5435 hci_send_cmd(&hci_remote_oob_data_request_reply, &connection->address, c_192, r_192); 5436 } else { 5437 hci_stack->classic_oob_con_handle = connection->con_handle; 5438 hci_send_cmd(&hci_remote_oob_data_request_negative_reply, &connection->address); 5439 } 5440 return true; 5441 } 5442 #endif 5443 5444 if (connection->authentication_flags & AUTH_FLAG_SEND_USER_CONFIRM_REPLY){ 5445 connectionClearAuthenticationFlags(connection, AUTH_FLAG_SEND_USER_CONFIRM_REPLY); 5446 hci_send_cmd(&hci_user_confirmation_request_reply, &connection->address); 5447 return true; 5448 } 5449 5450 if (connection->authentication_flags & AUTH_FLAG_SEND_USER_CONFIRM_NEGATIVE_REPLY){ 5451 connectionClearAuthenticationFlags(connection, AUTH_FLAG_SEND_USER_CONFIRM_NEGATIVE_REPLY); 5452 hci_send_cmd(&hci_user_confirmation_request_negative_reply, &connection->address); 5453 return true; 5454 } 5455 5456 if (connection->authentication_flags & AUTH_FLAG_SEND_USER_PASSKEY_REPLY){ 5457 connectionClearAuthenticationFlags(connection, AUTH_FLAG_SEND_USER_PASSKEY_REPLY); 5458 hci_send_cmd(&hci_user_passkey_request_reply, &connection->address, 000000); 5459 return true; 5460 } 5461 5462 if (connection->bonding_flags & BONDING_DISCONNECT_DEDICATED_DONE){ 5463 connection->bonding_flags &= ~BONDING_DISCONNECT_DEDICATED_DONE; 5464 connection->bonding_flags |= BONDING_EMIT_COMPLETE_ON_DISCONNECT; 5465 connection->state = SENT_DISCONNECT; 5466 hci_send_cmd(&hci_disconnect, connection->con_handle, ERROR_CODE_REMOTE_USER_TERMINATED_CONNECTION); 5467 return true; 5468 } 5469 5470 if ((connection->bonding_flags & BONDING_SEND_AUTHENTICATE_REQUEST) && ((connection->bonding_flags & BONDING_RECEIVED_REMOTE_FEATURES) != 0)){ 5471 connection->bonding_flags &= ~BONDING_SEND_AUTHENTICATE_REQUEST; 5472 connection->bonding_flags |= BONDING_SENT_AUTHENTICATE_REQUEST; 5473 hci_send_cmd(&hci_authentication_requested, connection->con_handle); 5474 return true; 5475 } 5476 5477 if (connection->bonding_flags & BONDING_SEND_ENCRYPTION_REQUEST){ 5478 connection->bonding_flags &= ~BONDING_SEND_ENCRYPTION_REQUEST; 5479 hci_send_cmd(&hci_set_connection_encryption, connection->con_handle, 1); 5480 return true; 5481 } 5482 5483 if (connection->bonding_flags & BONDING_SEND_READ_ENCRYPTION_KEY_SIZE){ 5484 connection->bonding_flags &= ~BONDING_SEND_READ_ENCRYPTION_KEY_SIZE; 5485 hci_send_cmd(&hci_read_encryption_key_size, connection->con_handle, 1); 5486 return true; 5487 } 5488 5489 if (connection->bonding_flags & BONDING_REQUEST_REMOTE_FEATURES_PAGE_0){ 5490 connection->bonding_flags &= ~BONDING_REQUEST_REMOTE_FEATURES_PAGE_0; 5491 hci_send_cmd(&hci_read_remote_supported_features_command, connection->con_handle); 5492 return true; 5493 } 5494 5495 if (connection->bonding_flags & BONDING_REQUEST_REMOTE_FEATURES_PAGE_1){ 5496 connection->bonding_flags &= ~BONDING_REQUEST_REMOTE_FEATURES_PAGE_1; 5497 hci_send_cmd(&hci_read_remote_extended_features_command, connection->con_handle, 1); 5498 return true; 5499 } 5500 5501 if (connection->bonding_flags & BONDING_REQUEST_REMOTE_FEATURES_PAGE_2){ 5502 connection->bonding_flags &= ~BONDING_REQUEST_REMOTE_FEATURES_PAGE_2; 5503 hci_send_cmd(&hci_read_remote_extended_features_command, connection->con_handle, 2); 5504 return true; 5505 } 5506 #endif 5507 5508 if (connection->bonding_flags & BONDING_DISCONNECT_SECURITY_BLOCK){ 5509 connection->bonding_flags &= ~BONDING_DISCONNECT_SECURITY_BLOCK; 5510 #ifdef ENABLE_CLASSIC 5511 hci_pairing_complete(connection, ERROR_CODE_CONNECTION_REJECTED_DUE_TO_SECURITY_REASONS); 5512 #endif 5513 if (connection->state != SENT_DISCONNECT){ 5514 connection->state = SENT_DISCONNECT; 5515 hci_send_cmd(&hci_disconnect, connection->con_handle, ERROR_CODE_AUTHENTICATION_FAILURE); 5516 return true; 5517 } 5518 } 5519 5520 #ifdef ENABLE_CLASSIC 5521 uint16_t sniff_min_interval; 5522 switch (connection->sniff_min_interval){ 5523 case 0: 5524 break; 5525 case 0xffff: 5526 connection->sniff_min_interval = 0; 5527 hci_send_cmd(&hci_exit_sniff_mode, connection->con_handle); 5528 return true; 5529 default: 5530 sniff_min_interval = connection->sniff_min_interval; 5531 connection->sniff_min_interval = 0; 5532 hci_send_cmd(&hci_sniff_mode, connection->con_handle, connection->sniff_max_interval, sniff_min_interval, connection->sniff_attempt, connection->sniff_timeout); 5533 return true; 5534 } 5535 5536 if (connection->sniff_subrating_max_latency != 0xffff){ 5537 uint16_t max_latency = connection->sniff_subrating_max_latency; 5538 connection->sniff_subrating_max_latency = 0; 5539 hci_send_cmd(&hci_sniff_subrating, connection->con_handle, max_latency, connection->sniff_subrating_min_remote_timeout, connection->sniff_subrating_min_local_timeout); 5540 return true; 5541 } 5542 5543 if (connection->qos_service_type != HCI_SERVICE_TYPE_INVALID){ 5544 uint8_t service_type = (uint8_t) connection->qos_service_type; 5545 connection->qos_service_type = HCI_SERVICE_TYPE_INVALID; 5546 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); 5547 return true; 5548 } 5549 5550 if (connection->request_role != HCI_ROLE_INVALID){ 5551 hci_role_t role = connection->request_role; 5552 connection->request_role = HCI_ROLE_INVALID; 5553 hci_send_cmd(&hci_switch_role_command, connection->address, role); 5554 return true; 5555 } 5556 #endif 5557 5558 #ifdef ENABLE_BLE 5559 switch (connection->le_con_parameter_update_state){ 5560 // response to L2CAP CON PARAMETER UPDATE REQUEST 5561 case CON_PARAMETER_UPDATE_CHANGE_HCI_CON_PARAMETERS: 5562 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NONE; 5563 hci_send_cmd(&hci_le_connection_update, connection->con_handle, connection->le_conn_interval_min, 5564 connection->le_conn_interval_max, connection->le_conn_latency, connection->le_supervision_timeout, 5565 0x0000, 0xffff); 5566 return true; 5567 case CON_PARAMETER_UPDATE_REPLY: 5568 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NONE; 5569 hci_send_cmd(&hci_le_remote_connection_parameter_request_reply, connection->con_handle, connection->le_conn_interval_min, 5570 connection->le_conn_interval_max, connection->le_conn_latency, connection->le_supervision_timeout, 5571 0x0000, 0xffff); 5572 return true; 5573 case CON_PARAMETER_UPDATE_NEGATIVE_REPLY: 5574 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NONE; 5575 hci_send_cmd(&hci_le_remote_connection_parameter_request_negative_reply, ERROR_CODE_UNSUPPORTED_LMP_PARAMETER_VALUE_UNSUPPORTED_LL_PARAMETER_VALUE); 5576 return true; 5577 default: 5578 break; 5579 } 5580 if (connection->le_phy_update_all_phys != 0xffu){ 5581 uint8_t all_phys = connection->le_phy_update_all_phys; 5582 connection->le_phy_update_all_phys = 0xff; 5583 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); 5584 return true; 5585 } 5586 #endif 5587 } 5588 return false; 5589 } 5590 5591 static void hci_run(void){ 5592 5593 // stack state sub statemachines 5594 // halting needs to be called even if we cannot send command packet now 5595 switch (hci_stack->state) { 5596 case HCI_STATE_INITIALIZING: 5597 hci_initializing_run(); 5598 break; 5599 case HCI_STATE_HALTING: 5600 hci_halting_run(); 5601 break; 5602 case HCI_STATE_FALLING_ASLEEP: 5603 hci_falling_asleep_run(); 5604 break; 5605 default: 5606 break; 5607 } 5608 5609 bool done; 5610 5611 // send continuation fragments first, as they block the prepared packet buffer 5612 done = hci_run_acl_fragments(); 5613 if (done) return; 5614 5615 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 5616 // send host num completed packets next as they don't require num_cmd_packets > 0 5617 if (!hci_can_send_comand_packet_transport()) return; 5618 if (hci_stack->host_completed_packets){ 5619 hci_host_num_completed_packets(); 5620 return; 5621 } 5622 #endif 5623 5624 if (!hci_can_send_command_packet_now()) return; 5625 5626 // global/non-connection oriented commands 5627 5628 5629 #ifdef ENABLE_CLASSIC 5630 // general gap classic 5631 done = hci_run_general_gap_classic(); 5632 if (done) return; 5633 #endif 5634 5635 #ifdef ENABLE_BLE 5636 // general gap le 5637 done = hci_run_general_gap_le(); 5638 if (done) return; 5639 #endif 5640 5641 // send pending HCI commands 5642 hci_run_general_pending_commands(); 5643 } 5644 5645 uint8_t hci_send_cmd_packet(uint8_t *packet, int size){ 5646 // house-keeping 5647 5648 #ifdef ENABLE_CLASSIC 5649 bd_addr_t addr; 5650 hci_connection_t * conn; 5651 #endif 5652 #ifdef ENABLE_LE_CENTRAL 5653 uint8_t initiator_filter_policy; 5654 #endif 5655 5656 uint16_t opcode = little_endian_read_16(packet, 0); 5657 switch (opcode) { 5658 case HCI_OPCODE_HCI_WRITE_LOOPBACK_MODE: 5659 hci_stack->loopback_mode = packet[3]; 5660 break; 5661 5662 #ifdef ENABLE_CLASSIC 5663 case HCI_OPCODE_HCI_CREATE_CONNECTION: 5664 reverse_bd_addr(&packet[3], addr); 5665 log_info("Create_connection to %s", bd_addr_to_str(addr)); 5666 5667 // CVE-2020-26555: reject outgoing connection to device with same BD ADDR 5668 if (memcmp(hci_stack->local_bd_addr, addr, 6) == 0) { 5669 hci_emit_connection_complete(addr, 0, ERROR_CODE_CONNECTION_REJECTED_DUE_TO_UNACCEPTABLE_BD_ADDR); 5670 return ERROR_CODE_CONNECTION_REJECTED_DUE_TO_UNACCEPTABLE_BD_ADDR; 5671 } 5672 5673 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 5674 if (!conn) { 5675 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 5676 if (!conn) { 5677 // notify client that alloc failed 5678 hci_emit_connection_complete(addr, 0, BTSTACK_MEMORY_ALLOC_FAILED); 5679 return BTSTACK_MEMORY_ALLOC_FAILED; // packet not sent to controller 5680 } 5681 conn->state = SEND_CREATE_CONNECTION; 5682 conn->role = HCI_ROLE_MASTER; 5683 } 5684 5685 conn->con_handle = HCI_CON_HANDLE_INVALID; 5686 conn->role = HCI_ROLE_INVALID; 5687 5688 log_info("conn state %u", conn->state); 5689 // TODO: L2CAP should not send create connection command, instead a (new) gap function should be used 5690 switch (conn->state) { 5691 // if connection active exists 5692 case OPEN: 5693 // and OPEN, emit connection complete command 5694 hci_emit_connection_complete(addr, conn->con_handle, ERROR_CODE_SUCCESS); 5695 // packet not sent to controller 5696 return ERROR_CODE_ACL_CONNECTION_ALREADY_EXISTS; 5697 case RECEIVED_DISCONNECTION_COMPLETE: 5698 // create connection triggered in disconnect complete event, let's do it now 5699 break; 5700 case SEND_CREATE_CONNECTION: 5701 // connection created by hci, e.g. dedicated bonding, but not executed yet, let's do it now 5702 break; 5703 default: 5704 // otherwise, just ignore as it is already in the open process 5705 // packet not sent to controller 5706 return ERROR_CODE_ACL_CONNECTION_ALREADY_EXISTS; 5707 } 5708 conn->state = SENT_CREATE_CONNECTION; 5709 5710 // track outgoing connection 5711 hci_stack->outgoing_addr_type = BD_ADDR_TYPE_ACL; 5712 (void) memcpy(hci_stack->outgoing_addr, addr, 6); 5713 break; 5714 5715 #if defined (ENABLE_SCO_OVER_HCI) || defined (HAVE_SCO_TRANSPORT) 5716 case HCI_OPCODE_HCI_SETUP_SYNCHRONOUS_CONNECTION: 5717 // setup_synchronous_connection? Voice setting at offset 22 5718 // TODO: compare to current setting if sco connection already active 5719 hci_stack->sco_voice_setting_active = little_endian_read_16(packet, 15); 5720 break; 5721 case HCI_OPCODE_HCI_ACCEPT_SYNCHRONOUS_CONNECTION: 5722 // accept_synchronous_connection? Voice setting at offset 18 5723 // TODO: compare to current setting if sco connection already active 5724 hci_stack->sco_voice_setting_active = little_endian_read_16(packet, 19); 5725 // track outgoing connection 5726 hci_stack->outgoing_addr_type = BD_ADDR_TYPE_SCO; 5727 reverse_bd_addr(&packet[3], hci_stack->outgoing_addr); 5728 break; 5729 #endif 5730 #endif 5731 5732 #ifdef ENABLE_BLE 5733 #ifdef ENABLE_LE_CENTRAL 5734 case HCI_OPCODE_HCI_LE_CREATE_CONNECTION: 5735 // white list used? 5736 initiator_filter_policy = packet[7]; 5737 switch (initiator_filter_policy) { 5738 case 0: 5739 // whitelist not used 5740 hci_stack->le_connecting_state = LE_CONNECTING_DIRECT; 5741 break; 5742 case 1: 5743 hci_stack->le_connecting_state = LE_CONNECTING_WHITELIST; 5744 break; 5745 default: 5746 log_error("Invalid initiator_filter_policy in LE Create Connection %u", initiator_filter_policy); 5747 break; 5748 } 5749 // track outgoing connection 5750 hci_stack->outgoing_addr_type = (bd_addr_type_t) packet[8]; // peer addres type 5751 reverse_bd_addr( &packet[9], hci_stack->outgoing_addr); // peer address 5752 break; 5753 case HCI_OPCODE_HCI_LE_CREATE_CONNECTION_CANCEL: 5754 hci_stack->le_connecting_state = LE_CONNECTING_CANCEL; 5755 break; 5756 #endif 5757 #endif 5758 default: 5759 break; 5760 } 5761 5762 hci_stack->num_cmd_packets--; 5763 5764 hci_dump_packet(HCI_COMMAND_DATA_PACKET, 0, packet, size); 5765 int err = hci_stack->hci_transport->send_packet(HCI_COMMAND_DATA_PACKET, packet, size); 5766 if (err != 0){ 5767 return ERROR_CODE_HARDWARE_FAILURE; 5768 } 5769 return ERROR_CODE_SUCCESS; 5770 } 5771 5772 // disconnect because of security block 5773 void hci_disconnect_security_block(hci_con_handle_t con_handle){ 5774 hci_connection_t * connection = hci_connection_for_handle(con_handle); 5775 if (!connection) return; 5776 connection->bonding_flags |= BONDING_DISCONNECT_SECURITY_BLOCK; 5777 } 5778 5779 5780 // Configure Secure Simple Pairing 5781 5782 #ifdef ENABLE_CLASSIC 5783 5784 // enable will enable SSP during init 5785 void gap_ssp_set_enable(int enable){ 5786 hci_stack->ssp_enable = enable; 5787 } 5788 5789 static int hci_local_ssp_activated(void){ 5790 return gap_ssp_supported() && hci_stack->ssp_enable; 5791 } 5792 5793 // if set, BTstack will respond to io capability request using authentication requirement 5794 void gap_ssp_set_io_capability(int io_capability){ 5795 hci_stack->ssp_io_capability = io_capability; 5796 } 5797 void gap_ssp_set_authentication_requirement(int authentication_requirement){ 5798 hci_stack->ssp_authentication_requirement = authentication_requirement; 5799 } 5800 5801 // if set, BTstack will confirm a numberic comparion and enter '000000' if requested 5802 void gap_ssp_set_auto_accept(int auto_accept){ 5803 hci_stack->ssp_auto_accept = auto_accept; 5804 } 5805 5806 void gap_secure_connections_enable(bool enable){ 5807 hci_stack->secure_connections_enable = enable; 5808 } 5809 5810 #endif 5811 5812 // va_list part of hci_send_cmd 5813 uint8_t hci_send_cmd_va_arg(const hci_cmd_t * cmd, va_list argptr){ 5814 if (!hci_can_send_command_packet_now()){ 5815 log_error("hci_send_cmd called but cannot send packet now"); 5816 return ERROR_CODE_COMMAND_DISALLOWED; 5817 } 5818 5819 // for HCI INITIALIZATION 5820 // log_info("hci_send_cmd: opcode %04x", cmd->opcode); 5821 hci_stack->last_cmd_opcode = cmd->opcode; 5822 5823 hci_reserve_packet_buffer(); 5824 uint8_t * packet = hci_stack->hci_packet_buffer; 5825 uint16_t size = hci_cmd_create_from_template(packet, cmd, argptr); 5826 uint8_t status = hci_send_cmd_packet(packet, size); 5827 5828 // release packet buffer on error or for synchronous transport implementations 5829 if ((status != ERROR_CODE_SUCCESS) || hci_transport_synchronous()){ 5830 hci_release_packet_buffer(); 5831 hci_emit_transport_packet_sent(); 5832 } 5833 5834 return status; 5835 } 5836 5837 /** 5838 * pre: numcmds >= 0 - it's allowed to send a command to the controller 5839 */ 5840 uint8_t hci_send_cmd(const hci_cmd_t * cmd, ...){ 5841 va_list argptr; 5842 va_start(argptr, cmd); 5843 uint8_t status = hci_send_cmd_va_arg(cmd, argptr); 5844 va_end(argptr); 5845 return status; 5846 } 5847 5848 // Create various non-HCI events. 5849 // TODO: generalize, use table similar to hci_create_command 5850 5851 static void hci_emit_event(uint8_t * event, uint16_t size, int dump){ 5852 // dump packet 5853 if (dump) { 5854 hci_dump_packet( HCI_EVENT_PACKET, 0, event, size); 5855 } 5856 5857 // dispatch to all event handlers 5858 btstack_linked_list_iterator_t it; 5859 btstack_linked_list_iterator_init(&it, &hci_stack->event_handlers); 5860 while (btstack_linked_list_iterator_has_next(&it)){ 5861 btstack_packet_callback_registration_t * entry = (btstack_packet_callback_registration_t*) btstack_linked_list_iterator_next(&it); 5862 entry->callback(HCI_EVENT_PACKET, 0, event, size); 5863 } 5864 } 5865 5866 static void hci_emit_acl_packet(uint8_t * packet, uint16_t size){ 5867 if (!hci_stack->acl_packet_handler) return; 5868 hci_stack->acl_packet_handler(HCI_ACL_DATA_PACKET, 0, packet, size); 5869 } 5870 5871 #ifdef ENABLE_CLASSIC 5872 static void hci_notify_if_sco_can_send_now(void){ 5873 // notify SCO sender if waiting 5874 if (!hci_stack->sco_waiting_for_can_send_now) return; 5875 if (hci_can_send_sco_packet_now()){ 5876 hci_stack->sco_waiting_for_can_send_now = 0; 5877 uint8_t event[2] = { HCI_EVENT_SCO_CAN_SEND_NOW, 0 }; 5878 hci_dump_packet(HCI_EVENT_PACKET, 1, event, sizeof(event)); 5879 hci_stack->sco_packet_handler(HCI_EVENT_PACKET, 0, event, sizeof(event)); 5880 } 5881 } 5882 5883 // parsing end emitting has been merged to reduce code size 5884 static void gap_inquiry_explode(uint8_t *packet, uint16_t size) { 5885 uint8_t event[28+GAP_INQUIRY_MAX_NAME_LEN]; 5886 5887 uint8_t * eir_data; 5888 ad_context_t context; 5889 const uint8_t * name; 5890 uint8_t name_len; 5891 5892 if (size < 3) return; 5893 5894 int event_type = hci_event_packet_get_type(packet); 5895 int num_reserved_fields = (event_type == HCI_EVENT_INQUIRY_RESULT) ? 2 : 1; // 2 for old event, 1 otherwise 5896 int num_responses = hci_event_inquiry_result_get_num_responses(packet); 5897 5898 switch (event_type){ 5899 case HCI_EVENT_INQUIRY_RESULT: 5900 case HCI_EVENT_INQUIRY_RESULT_WITH_RSSI: 5901 if (size != (3 + (num_responses * 14))) return; 5902 break; 5903 case HCI_EVENT_EXTENDED_INQUIRY_RESPONSE: 5904 if (size != 257) return; 5905 if (num_responses != 1) return; 5906 break; 5907 default: 5908 return; 5909 } 5910 5911 // event[1] is set at the end 5912 int i; 5913 for (i=0; i<num_responses;i++){ 5914 memset(event, 0, sizeof(event)); 5915 event[0] = GAP_EVENT_INQUIRY_RESULT; 5916 uint8_t event_size = 27; // if name is not set by EIR 5917 5918 (void)memcpy(&event[2], &packet[3 + (i * 6)], 6); // bd_addr 5919 event[8] = packet[3 + (num_responses*(6)) + (i*1)]; // page_scan_repetition_mode 5920 (void)memcpy(&event[9], 5921 &packet[3 + (num_responses * (6 + 1 + num_reserved_fields)) + (i * 3)], 5922 3); // class of device 5923 (void)memcpy(&event[12], 5924 &packet[3 + (num_responses * (6 + 1 + num_reserved_fields + 3)) + (i * 2)], 5925 2); // clock offset 5926 5927 switch (event_type){ 5928 case HCI_EVENT_INQUIRY_RESULT: 5929 // 14,15,16,17 = 0, size 18 5930 break; 5931 case HCI_EVENT_INQUIRY_RESULT_WITH_RSSI: 5932 event[14] = 1; 5933 event[15] = packet [3 + (num_responses*(6+1+num_reserved_fields+3+2)) + (i*1)]; // rssi 5934 // 16,17 = 0, size 18 5935 break; 5936 case HCI_EVENT_EXTENDED_INQUIRY_RESPONSE: 5937 event[14] = 1; 5938 event[15] = packet [3 + (num_responses*(6+1+num_reserved_fields+3+2)) + (i*1)]; // rssi 5939 // EIR packets only contain a single inquiry response 5940 eir_data = &packet[3 + (6+1+num_reserved_fields+3+2+1)]; 5941 name = NULL; 5942 // Iterate over EIR data 5943 for (ad_iterator_init(&context, EXTENDED_INQUIRY_RESPONSE_DATA_LEN, eir_data) ; ad_iterator_has_more(&context) ; ad_iterator_next(&context)){ 5944 uint8_t data_type = ad_iterator_get_data_type(&context); 5945 uint8_t data_size = ad_iterator_get_data_len(&context); 5946 const uint8_t * data = ad_iterator_get_data(&context); 5947 // Prefer Complete Local Name over Shortened Local Name 5948 switch (data_type){ 5949 case BLUETOOTH_DATA_TYPE_SHORTENED_LOCAL_NAME: 5950 if (name) continue; 5951 /* fall through */ 5952 case BLUETOOTH_DATA_TYPE_COMPLETE_LOCAL_NAME: 5953 name = data; 5954 name_len = data_size; 5955 break; 5956 case BLUETOOTH_DATA_TYPE_DEVICE_ID: 5957 if (data_size != 8) break; 5958 event[16] = 1; 5959 memcpy(&event[17], data, 8); 5960 break; 5961 default: 5962 break; 5963 } 5964 } 5965 if (name){ 5966 event[25] = 1; 5967 // truncate name if needed 5968 int len = btstack_min(name_len, GAP_INQUIRY_MAX_NAME_LEN); 5969 event[26] = len; 5970 (void)memcpy(&event[27], name, len); 5971 event_size += len; 5972 } 5973 break; 5974 default: 5975 return; 5976 } 5977 event[1] = event_size - 2; 5978 hci_emit_event(event, event_size, 1); 5979 } 5980 } 5981 #endif 5982 5983 void hci_emit_state(void){ 5984 log_info("BTSTACK_EVENT_STATE %u", hci_stack->state); 5985 uint8_t event[3]; 5986 event[0] = BTSTACK_EVENT_STATE; 5987 event[1] = sizeof(event) - 2u; 5988 event[2] = hci_stack->state; 5989 hci_emit_event(event, sizeof(event), 1); 5990 } 5991 5992 #ifdef ENABLE_CLASSIC 5993 static void hci_emit_connection_complete(bd_addr_t address, hci_con_handle_t con_handle, uint8_t status){ 5994 uint8_t event[13]; 5995 event[0] = HCI_EVENT_CONNECTION_COMPLETE; 5996 event[1] = sizeof(event) - 2; 5997 event[2] = status; 5998 little_endian_store_16(event, 3, con_handle); 5999 reverse_bd_addr(address, &event[5]); 6000 event[11] = 1; // ACL connection 6001 event[12] = 0; // encryption disabled 6002 hci_emit_event(event, sizeof(event), 1); 6003 } 6004 static void hci_emit_l2cap_check_timeout(hci_connection_t *conn){ 6005 if (disable_l2cap_timeouts) return; 6006 log_info("L2CAP_EVENT_TIMEOUT_CHECK"); 6007 uint8_t event[4]; 6008 event[0] = L2CAP_EVENT_TIMEOUT_CHECK; 6009 event[1] = sizeof(event) - 2; 6010 little_endian_store_16(event, 2, conn->con_handle); 6011 hci_emit_event(event, sizeof(event), 1); 6012 } 6013 #endif 6014 6015 #ifdef ENABLE_BLE 6016 #ifdef ENABLE_LE_CENTRAL 6017 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){ 6018 uint8_t event[21]; 6019 event[0] = HCI_EVENT_LE_META; 6020 event[1] = sizeof(event) - 2u; 6021 event[2] = HCI_SUBEVENT_LE_CONNECTION_COMPLETE; 6022 event[3] = status; 6023 little_endian_store_16(event, 4, con_handle); 6024 event[6] = 0; // TODO: role 6025 event[7] = address_type; 6026 reverse_bd_addr(address, &event[8]); 6027 little_endian_store_16(event, 14, 0); // interval 6028 little_endian_store_16(event, 16, 0); // latency 6029 little_endian_store_16(event, 18, 0); // supervision timeout 6030 event[20] = 0; // master clock accuracy 6031 hci_emit_event(event, sizeof(event), 1); 6032 } 6033 #endif 6034 #endif 6035 6036 static void hci_emit_transport_packet_sent(void){ 6037 // notify upper stack that it might be possible to send again 6038 uint8_t event[] = { HCI_EVENT_TRANSPORT_PACKET_SENT, 0}; 6039 hci_emit_event(&event[0], sizeof(event), 0); // don't dump 6040 } 6041 6042 static void hci_emit_disconnection_complete(hci_con_handle_t con_handle, uint8_t reason){ 6043 uint8_t event[6]; 6044 event[0] = HCI_EVENT_DISCONNECTION_COMPLETE; 6045 event[1] = sizeof(event) - 2u; 6046 event[2] = 0; // status = OK 6047 little_endian_store_16(event, 3, con_handle); 6048 event[5] = reason; 6049 hci_emit_event(event, sizeof(event), 1); 6050 } 6051 6052 static void hci_emit_nr_connections_changed(void){ 6053 log_info("BTSTACK_EVENT_NR_CONNECTIONS_CHANGED %u", nr_hci_connections()); 6054 uint8_t event[3]; 6055 event[0] = BTSTACK_EVENT_NR_CONNECTIONS_CHANGED; 6056 event[1] = sizeof(event) - 2u; 6057 event[2] = nr_hci_connections(); 6058 hci_emit_event(event, sizeof(event), 1); 6059 } 6060 6061 static void hci_emit_hci_open_failed(void){ 6062 log_info("BTSTACK_EVENT_POWERON_FAILED"); 6063 uint8_t event[2]; 6064 event[0] = BTSTACK_EVENT_POWERON_FAILED; 6065 event[1] = sizeof(event) - 2u; 6066 hci_emit_event(event, sizeof(event), 1); 6067 } 6068 6069 static void hci_emit_dedicated_bonding_result(bd_addr_t address, uint8_t status){ 6070 log_info("hci_emit_dedicated_bonding_result %u ", status); 6071 uint8_t event[9]; 6072 int pos = 0; 6073 event[pos++] = GAP_EVENT_DEDICATED_BONDING_COMPLETED; 6074 event[pos++] = sizeof(event) - 2u; 6075 event[pos++] = status; 6076 reverse_bd_addr(address, &event[pos]); 6077 hci_emit_event(event, sizeof(event), 1); 6078 } 6079 6080 6081 #ifdef ENABLE_CLASSIC 6082 6083 static void hci_emit_security_level(hci_con_handle_t con_handle, gap_security_level_t level){ 6084 log_info("hci_emit_security_level %u for handle %x", level, con_handle); 6085 uint8_t event[5]; 6086 int pos = 0; 6087 event[pos++] = GAP_EVENT_SECURITY_LEVEL; 6088 event[pos++] = sizeof(event) - 2; 6089 little_endian_store_16(event, 2, con_handle); 6090 pos += 2; 6091 event[pos++] = level; 6092 hci_emit_event(event, sizeof(event), 1); 6093 } 6094 6095 static gap_security_level_t gap_security_level_for_connection(hci_connection_t * connection){ 6096 if (!connection) return LEVEL_0; 6097 if ((connection->authentication_flags & AUTH_FLAG_CONNECTION_ENCRYPTED) == 0) return LEVEL_0; 6098 // BIAS: we only consider Authenticated if the connection is already encrypted, which requires that both sides have link key 6099 if ((connection->authentication_flags & AUTH_FLAG_CONNECTION_AUTHENTICATED) == 0) return LEVEL_0; 6100 if (connection->encryption_key_size < hci_stack->gap_required_encyrption_key_size) return LEVEL_0; 6101 gap_security_level_t security_level = gap_security_level_for_link_key_type(connection->link_key_type); 6102 // LEVEL 4 always requires 128 bit encrytion key size 6103 if ((security_level == LEVEL_4) && (connection->encryption_key_size < 16)){ 6104 security_level = LEVEL_3; 6105 } 6106 return security_level; 6107 } 6108 6109 static void hci_emit_discoverable_enabled(uint8_t enabled){ 6110 log_info("BTSTACK_EVENT_DISCOVERABLE_ENABLED %u", enabled); 6111 uint8_t event[3]; 6112 event[0] = BTSTACK_EVENT_DISCOVERABLE_ENABLED; 6113 event[1] = sizeof(event) - 2; 6114 event[2] = enabled; 6115 hci_emit_event(event, sizeof(event), 1); 6116 } 6117 6118 // query if remote side supports eSCO 6119 bool hci_remote_esco_supported(hci_con_handle_t con_handle){ 6120 hci_connection_t * connection = hci_connection_for_handle(con_handle); 6121 if (!connection) return false; 6122 return (connection->remote_supported_features[0] & 1) != 0; 6123 } 6124 6125 static bool hci_ssp_supported(hci_connection_t * connection){ 6126 const uint8_t mask = BONDING_REMOTE_SUPPORTS_SSP_CONTROLLER | BONDING_REMOTE_SUPPORTS_SSP_HOST; 6127 return (connection->bonding_flags & mask) == mask; 6128 } 6129 6130 // query if remote side supports SSP 6131 bool hci_remote_ssp_supported(hci_con_handle_t con_handle){ 6132 hci_connection_t * connection = hci_connection_for_handle(con_handle); 6133 if (!connection) return false; 6134 return hci_ssp_supported(connection) ? 1 : 0; 6135 } 6136 6137 bool gap_ssp_supported_on_both_sides(hci_con_handle_t handle){ 6138 return hci_local_ssp_activated() && hci_remote_ssp_supported(handle); 6139 } 6140 6141 /** 6142 * Check if remote supported features query has completed 6143 */ 6144 bool hci_remote_features_available(hci_con_handle_t handle){ 6145 hci_connection_t * connection = hci_connection_for_handle(handle); 6146 if (!connection) return false; 6147 return (connection->bonding_flags & BONDING_RECEIVED_REMOTE_FEATURES) != 0; 6148 } 6149 6150 /** 6151 * Trigger remote supported features query 6152 */ 6153 6154 static void hci_trigger_remote_features_for_connection(hci_connection_t * connection){ 6155 if ((connection->bonding_flags & (BONDING_REMOTE_FEATURES_QUERY_ACTIVE | BONDING_RECEIVED_REMOTE_FEATURES)) == 0){ 6156 connection->bonding_flags |= BONDING_REMOTE_FEATURES_QUERY_ACTIVE | BONDING_REQUEST_REMOTE_FEATURES_PAGE_0; 6157 } 6158 } 6159 6160 void hci_remote_features_query(hci_con_handle_t con_handle){ 6161 hci_connection_t * connection = hci_connection_for_handle(con_handle); 6162 if (!connection) return; 6163 hci_trigger_remote_features_for_connection(connection); 6164 hci_run(); 6165 } 6166 6167 // GAP API 6168 /** 6169 * @bbrief enable/disable bonding. default is enabled 6170 * @praram enabled 6171 */ 6172 void gap_set_bondable_mode(int enable){ 6173 hci_stack->bondable = enable ? 1 : 0; 6174 } 6175 /** 6176 * @brief Get bondable mode. 6177 * @return 1 if bondable 6178 */ 6179 int gap_get_bondable_mode(void){ 6180 return hci_stack->bondable; 6181 } 6182 6183 /** 6184 * @brief map link keys to security levels 6185 */ 6186 gap_security_level_t gap_security_level_for_link_key_type(link_key_type_t link_key_type){ 6187 switch (link_key_type){ 6188 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P256: 6189 return LEVEL_4; 6190 case COMBINATION_KEY: 6191 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P192: 6192 return LEVEL_3; 6193 default: 6194 return LEVEL_2; 6195 } 6196 } 6197 6198 /** 6199 * @brief map link keys to secure connection yes/no 6200 */ 6201 bool gap_secure_connection_for_link_key_type(link_key_type_t link_key_type){ 6202 switch (link_key_type){ 6203 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P256: 6204 case UNAUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P256: 6205 return true; 6206 default: 6207 return false; 6208 } 6209 } 6210 6211 /** 6212 * @brief map link keys to authenticated 6213 */ 6214 bool gap_authenticated_for_link_key_type(link_key_type_t link_key_type){ 6215 switch (link_key_type){ 6216 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P256: 6217 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P192: 6218 return true; 6219 default: 6220 return false; 6221 } 6222 } 6223 6224 bool gap_mitm_protection_required_for_security_level(gap_security_level_t level){ 6225 log_info("gap_mitm_protection_required_for_security_level %u", level); 6226 return level > LEVEL_2; 6227 } 6228 6229 /** 6230 * @brief get current security level 6231 */ 6232 gap_security_level_t gap_security_level(hci_con_handle_t con_handle){ 6233 hci_connection_t * connection = hci_connection_for_handle(con_handle); 6234 if (!connection) return LEVEL_0; 6235 return gap_security_level_for_connection(connection); 6236 } 6237 6238 /** 6239 * @brief request connection to device to 6240 * @result GAP_AUTHENTICATION_RESULT 6241 */ 6242 void gap_request_security_level(hci_con_handle_t con_handle, gap_security_level_t requested_level){ 6243 hci_connection_t * connection = hci_connection_for_handle(con_handle); 6244 if (!connection){ 6245 hci_emit_security_level(con_handle, LEVEL_0); 6246 return; 6247 } 6248 6249 btstack_assert(hci_is_le_connection(connection) == false); 6250 6251 // 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) 6252 // available on the BR/EDR physical transport require Security Mode 4, Level 4 " 6253 if (hci_stack->gap_secure_connections_only_mode && (requested_level != LEVEL_0)){ 6254 requested_level = LEVEL_4; 6255 } 6256 6257 gap_security_level_t current_level = gap_security_level(con_handle); 6258 log_info("gap_request_security_level requested level %u, planned level %u, current level %u", 6259 requested_level, connection->requested_security_level, current_level); 6260 6261 // authentication active if authentication request was sent or planned level > 0 6262 bool authentication_active = ((connection->bonding_flags & BONDING_SENT_AUTHENTICATE_REQUEST) != 0) || (connection->requested_security_level > LEVEL_0); 6263 if (authentication_active){ 6264 // authentication already active 6265 if (connection->requested_security_level < requested_level){ 6266 // increase requested level as new level is higher 6267 // TODO: handle re-authentication when done 6268 connection->requested_security_level = requested_level; 6269 } 6270 } else { 6271 // no request active, notify if security sufficient 6272 if (requested_level <= current_level){ 6273 hci_emit_security_level(con_handle, current_level); 6274 return; 6275 } 6276 6277 // store request 6278 connection->requested_security_level = requested_level; 6279 6280 // request remote features if not already active 6281 hci_remote_features_query(con_handle); 6282 6283 // start to authenticate connection 6284 connection->bonding_flags |= BONDING_SEND_AUTHENTICATE_REQUEST; 6285 hci_run(); 6286 } 6287 } 6288 6289 /** 6290 * @brief start dedicated bonding with device. disconnect after bonding 6291 * @param device 6292 * @param request MITM protection 6293 * @result GAP_DEDICATED_BONDING_COMPLETE 6294 */ 6295 int gap_dedicated_bonding(bd_addr_t device, int mitm_protection_required){ 6296 6297 // create connection state machine 6298 hci_connection_t * connection = create_connection_for_bd_addr_and_type(device, BD_ADDR_TYPE_ACL); 6299 6300 if (!connection){ 6301 return BTSTACK_MEMORY_ALLOC_FAILED; 6302 } 6303 6304 // delete linkn key 6305 gap_drop_link_key_for_bd_addr(device); 6306 6307 // configure LEVEL_2/3, dedicated bonding 6308 connection->state = SEND_CREATE_CONNECTION; 6309 connection->requested_security_level = mitm_protection_required ? LEVEL_3 : LEVEL_2; 6310 log_info("gap_dedicated_bonding, mitm %d -> level %u", mitm_protection_required, connection->requested_security_level); 6311 connection->bonding_flags = BONDING_DEDICATED; 6312 6313 // wait for GAP Security Result and send GAP Dedicated Bonding complete 6314 6315 // handle: connnection failure (connection complete != ok) 6316 // handle: authentication failure 6317 // handle: disconnect on done 6318 6319 hci_run(); 6320 6321 return 0; 6322 } 6323 6324 void gap_set_local_name(const char * local_name){ 6325 hci_stack->local_name = local_name; 6326 hci_stack->gap_tasks_classic |= GAP_TASK_SET_LOCAL_NAME; 6327 // also update EIR if not set by user 6328 if (hci_stack->eir_data == NULL){ 6329 hci_stack->gap_tasks_classic |= GAP_TASK_SET_EIR_DATA; 6330 } 6331 hci_run(); 6332 } 6333 #endif 6334 6335 6336 #ifdef ENABLE_BLE 6337 6338 #ifdef ENABLE_LE_CENTRAL 6339 void gap_start_scan(void){ 6340 hci_stack->le_scanning_enabled = true; 6341 hci_run(); 6342 } 6343 6344 void gap_stop_scan(void){ 6345 hci_stack->le_scanning_enabled = false; 6346 hci_run(); 6347 } 6348 6349 void gap_set_scan_params(uint8_t scan_type, uint16_t scan_interval, uint16_t scan_window, uint8_t scanning_filter_policy){ 6350 hci_stack->le_scan_type = scan_type; 6351 hci_stack->le_scan_filter_policy = scanning_filter_policy; 6352 hci_stack->le_scan_interval = scan_interval; 6353 hci_stack->le_scan_window = scan_window; 6354 hci_stack->le_scanning_param_update = true; 6355 hci_run(); 6356 } 6357 6358 void gap_set_scan_parameters(uint8_t scan_type, uint16_t scan_interval, uint16_t scan_window){ 6359 gap_set_scan_params(scan_type, scan_interval, scan_window, 0); 6360 } 6361 6362 uint8_t gap_connect(const bd_addr_t addr, bd_addr_type_t addr_type){ 6363 hci_connection_t * conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 6364 if (!conn){ 6365 // disallow if le connection is already outgoing 6366 if (hci_is_le_connection_type(addr_type) && hci_stack->le_connecting_request != LE_CONNECTING_IDLE){ 6367 log_error("le connection already active"); 6368 return ERROR_CODE_COMMAND_DISALLOWED; 6369 } 6370 6371 log_info("gap_connect: no connection exists yet, creating context"); 6372 conn = create_connection_for_bd_addr_and_type(addr, addr_type); 6373 if (!conn){ 6374 // notify client that alloc failed 6375 hci_emit_le_connection_complete(addr_type, addr, 0, BTSTACK_MEMORY_ALLOC_FAILED); 6376 log_info("gap_connect: failed to alloc hci_connection_t"); 6377 return GATT_CLIENT_NOT_CONNECTED; // don't sent packet to controller 6378 } 6379 6380 // set le connecting state 6381 if (hci_is_le_connection_type(addr_type)){ 6382 hci_stack->le_connecting_request = LE_CONNECTING_DIRECT; 6383 } 6384 6385 conn->state = SEND_CREATE_CONNECTION; 6386 log_info("gap_connect: send create connection next"); 6387 hci_run(); 6388 return ERROR_CODE_SUCCESS; 6389 } 6390 6391 if (!hci_is_le_connection(conn) || 6392 (conn->state == SEND_CREATE_CONNECTION) || 6393 (conn->state == SENT_CREATE_CONNECTION)) { 6394 hci_emit_le_connection_complete(conn->address_type, conn->address, 0, ERROR_CODE_COMMAND_DISALLOWED); 6395 log_error("gap_connect: classic connection or connect is already being created"); 6396 return GATT_CLIENT_IN_WRONG_STATE; 6397 } 6398 6399 // check if connection was just disconnected 6400 if (conn->state == RECEIVED_DISCONNECTION_COMPLETE){ 6401 log_info("gap_connect: send create connection (again)"); 6402 conn->state = SEND_CREATE_CONNECTION; 6403 hci_run(); 6404 return ERROR_CODE_SUCCESS; 6405 } 6406 6407 log_info("gap_connect: context exists with state %u", conn->state); 6408 hci_emit_le_connection_complete(conn->address_type, conn->address, conn->con_handle, ERROR_CODE_SUCCESS); 6409 hci_run(); 6410 return ERROR_CODE_SUCCESS; 6411 } 6412 6413 // @assumption: only a single outgoing LE Connection exists 6414 static hci_connection_t * gap_get_outgoing_connection(void){ 6415 btstack_linked_item_t *it; 6416 for (it = (btstack_linked_item_t *) hci_stack->connections; it != NULL; it = it->next){ 6417 hci_connection_t * conn = (hci_connection_t *) it; 6418 if (!hci_is_le_connection(conn)) continue; 6419 switch (conn->state){ 6420 case SEND_CREATE_CONNECTION: 6421 case SENT_CREATE_CONNECTION: 6422 case SENT_CANCEL_CONNECTION: 6423 return conn; 6424 default: 6425 break; 6426 }; 6427 } 6428 return NULL; 6429 } 6430 6431 uint8_t gap_connect_cancel(void){ 6432 hci_connection_t * conn = gap_get_outgoing_connection(); 6433 if (!conn) return 0; 6434 switch (conn->state){ 6435 case SEND_CREATE_CONNECTION: 6436 // skip sending create connection and emit event instead 6437 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 6438 hci_emit_le_connection_complete(conn->address_type, conn->address, 0, ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER); 6439 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 6440 btstack_memory_hci_connection_free( conn ); 6441 break; 6442 case SENT_CREATE_CONNECTION: 6443 // request to send cancel connection 6444 conn->state = SEND_CANCEL_CONNECTION; 6445 hci_run(); 6446 break; 6447 default: 6448 break; 6449 } 6450 return 0; 6451 } 6452 6453 /** 6454 * @brief Set connection parameters for outgoing connections 6455 * @param conn_scan_interval (unit: 0.625 msec), default: 60 ms 6456 * @param conn_scan_window (unit: 0.625 msec), default: 30 ms 6457 * @param conn_interval_min (unit: 1.25ms), default: 10 ms 6458 * @param conn_interval_max (unit: 1.25ms), default: 30 ms 6459 * @param conn_latency, default: 4 6460 * @param supervision_timeout (unit: 10ms), default: 720 ms 6461 * @param min_ce_length (unit: 0.625ms), default: 10 ms 6462 * @param max_ce_length (unit: 0.625ms), default: 30 ms 6463 */ 6464 6465 void gap_set_connection_parameters(uint16_t conn_scan_interval, uint16_t conn_scan_window, 6466 uint16_t conn_interval_min, uint16_t conn_interval_max, uint16_t conn_latency, 6467 uint16_t supervision_timeout, uint16_t min_ce_length, uint16_t max_ce_length){ 6468 hci_stack->le_connection_scan_interval = conn_scan_interval; 6469 hci_stack->le_connection_scan_window = conn_scan_window; 6470 hci_stack->le_connection_interval_min = conn_interval_min; 6471 hci_stack->le_connection_interval_max = conn_interval_max; 6472 hci_stack->le_connection_latency = conn_latency; 6473 hci_stack->le_supervision_timeout = supervision_timeout; 6474 hci_stack->le_minimum_ce_length = min_ce_length; 6475 hci_stack->le_maximum_ce_length = max_ce_length; 6476 } 6477 #endif 6478 6479 /** 6480 * @brief Updates the connection parameters for a given LE connection 6481 * @param handle 6482 * @param conn_interval_min (unit: 1.25ms) 6483 * @param conn_interval_max (unit: 1.25ms) 6484 * @param conn_latency 6485 * @param supervision_timeout (unit: 10ms) 6486 * @return 0 if ok 6487 */ 6488 int gap_update_connection_parameters(hci_con_handle_t con_handle, uint16_t conn_interval_min, 6489 uint16_t conn_interval_max, uint16_t conn_latency, uint16_t supervision_timeout){ 6490 hci_connection_t * connection = hci_connection_for_handle(con_handle); 6491 if (!connection) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 6492 connection->le_conn_interval_min = conn_interval_min; 6493 connection->le_conn_interval_max = conn_interval_max; 6494 connection->le_conn_latency = conn_latency; 6495 connection->le_supervision_timeout = supervision_timeout; 6496 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_CHANGE_HCI_CON_PARAMETERS; 6497 hci_run(); 6498 return 0; 6499 } 6500 6501 /** 6502 * @brief Request an update of the connection parameter for a given LE connection 6503 * @param handle 6504 * @param conn_interval_min (unit: 1.25ms) 6505 * @param conn_interval_max (unit: 1.25ms) 6506 * @param conn_latency 6507 * @param supervision_timeout (unit: 10ms) 6508 * @return 0 if ok 6509 */ 6510 int gap_request_connection_parameter_update(hci_con_handle_t con_handle, uint16_t conn_interval_min, 6511 uint16_t conn_interval_max, uint16_t conn_latency, uint16_t supervision_timeout){ 6512 hci_connection_t * connection = hci_connection_for_handle(con_handle); 6513 if (!connection) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 6514 connection->le_conn_interval_min = conn_interval_min; 6515 connection->le_conn_interval_max = conn_interval_max; 6516 connection->le_conn_latency = conn_latency; 6517 connection->le_supervision_timeout = supervision_timeout; 6518 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_SEND_REQUEST; 6519 uint8_t l2cap_trigger_run_event[2] = { L2CAP_EVENT_TRIGGER_RUN, 0}; 6520 hci_emit_event(l2cap_trigger_run_event, sizeof(l2cap_trigger_run_event), 0); 6521 return 0; 6522 } 6523 6524 #ifdef ENABLE_LE_PERIPHERAL 6525 6526 /** 6527 * @brief Set Advertisement Data 6528 * @param advertising_data_length 6529 * @param advertising_data (max 31 octets) 6530 * @note data is not copied, pointer has to stay valid 6531 */ 6532 void gap_advertisements_set_data(uint8_t advertising_data_length, uint8_t * advertising_data){ 6533 hci_stack->le_advertisements_data_len = advertising_data_length; 6534 hci_stack->le_advertisements_data = advertising_data; 6535 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_ADV_DATA; 6536 hci_run(); 6537 } 6538 6539 /** 6540 * @brief Set Scan Response Data 6541 * @param advertising_data_length 6542 * @param advertising_data (max 31 octets) 6543 * @note data is not copied, pointer has to stay valid 6544 */ 6545 void gap_scan_response_set_data(uint8_t scan_response_data_length, uint8_t * scan_response_data){ 6546 hci_stack->le_scan_response_data_len = scan_response_data_length; 6547 hci_stack->le_scan_response_data = scan_response_data; 6548 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA; 6549 hci_run(); 6550 } 6551 6552 /** 6553 * @brief Set Advertisement Parameters 6554 * @param adv_int_min 6555 * @param adv_int_max 6556 * @param adv_type 6557 * @param direct_address_type 6558 * @param direct_address 6559 * @param channel_map 6560 * @param filter_policy 6561 * 6562 * @note internal use. use gap_advertisements_set_params from gap_le.h instead. 6563 */ 6564 void hci_le_advertisements_set_params(uint16_t adv_int_min, uint16_t adv_int_max, uint8_t adv_type, 6565 uint8_t direct_address_typ, bd_addr_t direct_address, 6566 uint8_t channel_map, uint8_t filter_policy) { 6567 6568 hci_stack->le_advertisements_interval_min = adv_int_min; 6569 hci_stack->le_advertisements_interval_max = adv_int_max; 6570 hci_stack->le_advertisements_type = adv_type; 6571 hci_stack->le_advertisements_direct_address_type = direct_address_typ; 6572 hci_stack->le_advertisements_channel_map = channel_map; 6573 hci_stack->le_advertisements_filter_policy = filter_policy; 6574 (void)memcpy(hci_stack->le_advertisements_direct_address, direct_address, 6575 6); 6576 6577 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_PARAMS; 6578 hci_stack->le_advertisements_state |= LE_ADVERTISEMENT_STATE_PARAMS_SET; 6579 hci_run(); 6580 } 6581 6582 /** 6583 * @brief Enable/Disable Advertisements 6584 * @param enabled 6585 */ 6586 void gap_advertisements_enable(int enabled){ 6587 if (enabled == 0){ 6588 hci_stack->le_advertisements_state &= ~LE_ADVERTISEMENT_STATE_ENABLED; 6589 } else { 6590 hci_stack->le_advertisements_state |= LE_ADVERTISEMENT_STATE_ENABLED; 6591 } 6592 hci_update_advertisements_enabled_for_current_roles(); 6593 hci_run(); 6594 } 6595 6596 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 6597 static le_advertising_set_t * hci_advertising_set_for_handle(uint8_t advertising_handle){ 6598 btstack_linked_list_iterator_t it; 6599 btstack_linked_list_iterator_init(&it, &hci_stack->le_advertising_sets); 6600 while (btstack_linked_list_iterator_has_next(&it)){ 6601 le_advertising_set_t * item = (le_advertising_set_t *) btstack_linked_list_iterator_next(&it); 6602 if ( item->advertising_handle == advertising_handle ) { 6603 return item; 6604 } 6605 } 6606 return NULL; 6607 } 6608 6609 uint8_t gap_extended_advertising_setup(le_advertising_set_t * storage, const le_extended_advertising_parameters_t * advertising_parameters, uint8_t * out_advertising_handle){ 6610 // find free advertisement handle 6611 uint8_t advertisement_handle; 6612 for (advertisement_handle = 1; advertisement_handle <= LE_EXTENDED_ADVERTISING_MAX_HANDLE; advertisement_handle++){ 6613 if (hci_advertising_set_for_handle(advertisement_handle) == NULL) break; 6614 } 6615 if (advertisement_handle > LE_EXTENDED_ADVERTISING_MAX_HANDLE) return ERROR_CODE_MEMORY_CAPACITY_EXCEEDED; 6616 // clear 6617 memset(storage, 0, sizeof(le_advertising_set_t)); 6618 // copy params 6619 memcpy(&storage->extended_params, advertising_parameters, sizeof(le_extended_advertising_parameters_t)); 6620 // add to list 6621 bool add_ok = btstack_linked_list_add(&hci_stack->le_advertising_sets, (btstack_linked_item_t *) storage); 6622 if (!add_ok) return ERROR_CODE_ACL_CONNECTION_ALREADY_EXISTS; 6623 // set tasks and start 6624 storage->tasks = LE_ADVERTISEMENT_TASKS_SET_PARAMS; 6625 hci_run(); 6626 return ERROR_CODE_SUCCESS; 6627 } 6628 6629 uint8_t gap_extended_advertising_set_params(uint8_t advertising_handle, const le_extended_advertising_parameters_t * advertising_parameters){ 6630 le_advertising_set_t * advertising_set = hci_advertising_set_for_handle(advertising_handle); 6631 if (advertising_set == NULL) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 6632 memcpy(&advertising_set->extended_params, advertising_parameters, sizeof(le_extended_advertising_parameters_t)); 6633 // set tasks and start 6634 advertising_set->tasks |= LE_ADVERTISEMENT_TASKS_SET_PARAMS; 6635 hci_run(); 6636 return ERROR_CODE_SUCCESS; 6637 } 6638 6639 uint8_t gap_extended_advertising_get_params(uint8_t advertising_handle, le_extended_advertising_parameters_t * advertising_parameters){ 6640 le_advertising_set_t * advertising_set = hci_advertising_set_for_handle(advertising_handle); 6641 if (advertising_set == NULL) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 6642 memcpy(advertising_parameters, &advertising_set->extended_params, sizeof(le_extended_advertising_parameters_t)); 6643 return ERROR_CODE_SUCCESS; 6644 } 6645 6646 uint8_t gap_extended_advertising_set_random_address(uint8_t advertising_handle, bd_addr_t random_address){ 6647 le_advertising_set_t * advertising_set = hci_advertising_set_for_handle(advertising_handle); 6648 if (advertising_set == NULL) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 6649 memcpy(advertising_set->random_address, random_address, 6); 6650 // set tasks and start 6651 advertising_set->tasks |= LE_ADVERTISEMENT_TASKS_SET_ADDRESS; 6652 hci_run(); 6653 return ERROR_CODE_SUCCESS; 6654 } 6655 6656 uint8_t gap_extended_advertising_set_adv_data(uint8_t advertising_handle, uint16_t advertising_data_length, uint8_t * advertising_data){ 6657 le_advertising_set_t * advertising_set = hci_advertising_set_for_handle(advertising_handle); 6658 if (advertising_set == NULL) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 6659 advertising_set->adv_data = advertising_data; 6660 advertising_set->adv_data_len = advertising_data_length; 6661 // set tasks and start 6662 advertising_set->tasks |= LE_ADVERTISEMENT_TASKS_SET_ADV_DATA; 6663 hci_run(); 6664 return ERROR_CODE_SUCCESS; 6665 } 6666 6667 uint8_t gap_extended_advertising_set_scan_response_data(uint8_t advertising_handle, uint16_t scan_response_data_length, uint8_t * scan_response_data){ 6668 le_advertising_set_t * advertising_set = hci_advertising_set_for_handle(advertising_handle); 6669 if (advertising_set == NULL) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 6670 advertising_set->scan_data = scan_response_data; 6671 advertising_set->scan_data_len = scan_response_data_length; 6672 // set tasks and start 6673 advertising_set->tasks |= LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA; 6674 hci_run(); 6675 return ERROR_CODE_SUCCESS; 6676 } 6677 6678 uint8_t gap_extended_advertising_start(uint8_t advertising_handle, uint16_t timeout, uint8_t num_extended_advertising_events){ 6679 le_advertising_set_t * advertising_set = hci_advertising_set_for_handle(advertising_handle); 6680 if (advertising_set == NULL) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 6681 advertising_set->enable_timeout = timeout; 6682 advertising_set->enable_max_scan_events = num_extended_advertising_events; 6683 // set tasks and start 6684 advertising_set->state |= LE_ADVERTISEMENT_STATE_ENABLED; 6685 hci_run(); 6686 return ERROR_CODE_SUCCESS; 6687 } 6688 6689 uint8_t gap_extended_advertising_stop(uint8_t advertising_handle){ 6690 le_advertising_set_t * advertising_set = hci_advertising_set_for_handle(advertising_handle); 6691 if (advertising_set == NULL) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 6692 // set tasks and start 6693 advertising_set->state &= ~LE_ADVERTISEMENT_STATE_ENABLED; 6694 hci_run(); 6695 return ERROR_CODE_SUCCESS; 6696 } 6697 6698 uint8_t gap_extended_advertising_remove(uint8_t advertising_handle){ 6699 le_advertising_set_t * advertising_set = hci_advertising_set_for_handle(advertising_handle); 6700 if (advertising_set == NULL) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 6701 // set tasks and start 6702 advertising_set->tasks |= LE_ADVERTISEMENT_TASKS_REMOVE_SET; 6703 hci_run(); 6704 return ERROR_CODE_SUCCESS; 6705 } 6706 #endif 6707 6708 #endif 6709 6710 void hci_le_set_own_address_type(uint8_t own_address_type){ 6711 log_info("hci_le_set_own_address_type: old %u, new %u", hci_stack->le_own_addr_type, own_address_type); 6712 if (own_address_type == hci_stack->le_own_addr_type) return; 6713 hci_stack->le_own_addr_type = own_address_type; 6714 6715 #ifdef ENABLE_LE_PERIPHERAL 6716 // update advertisement parameters, too 6717 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_PARAMS; 6718 hci_run(); 6719 #endif 6720 #ifdef ENABLE_LE_CENTRAL 6721 // note: we don't update scan parameters or modify ongoing connection attempts 6722 #endif 6723 } 6724 6725 void hci_le_random_address_set(const bd_addr_t random_address){ 6726 memcpy(hci_stack->le_random_address, random_address, 6); 6727 hci_stack->le_random_address_set = true; 6728 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_ADDRESS; 6729 hci_run(); 6730 } 6731 6732 #endif 6733 6734 uint8_t gap_disconnect(hci_con_handle_t handle){ 6735 hci_connection_t * conn = hci_connection_for_handle(handle); 6736 if (!conn){ 6737 hci_emit_disconnection_complete(handle, 0); 6738 return 0; 6739 } 6740 // ignore if already disconnected 6741 if (conn->state == RECEIVED_DISCONNECTION_COMPLETE){ 6742 return 0; 6743 } 6744 conn->state = SEND_DISCONNECT; 6745 hci_run(); 6746 return 0; 6747 } 6748 6749 int gap_read_rssi(hci_con_handle_t con_handle){ 6750 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 6751 if (hci_connection == NULL) return 0; 6752 connectionSetAuthenticationFlags(hci_connection, AUTH_FLAG_READ_RSSI); 6753 hci_run(); 6754 return 1; 6755 } 6756 6757 /** 6758 * @brief Get connection type 6759 * @param con_handle 6760 * @result connection_type 6761 */ 6762 gap_connection_type_t gap_get_connection_type(hci_con_handle_t connection_handle){ 6763 hci_connection_t * conn = hci_connection_for_handle(connection_handle); 6764 if (!conn) return GAP_CONNECTION_INVALID; 6765 switch (conn->address_type){ 6766 case BD_ADDR_TYPE_LE_PUBLIC: 6767 case BD_ADDR_TYPE_LE_RANDOM: 6768 return GAP_CONNECTION_LE; 6769 case BD_ADDR_TYPE_SCO: 6770 return GAP_CONNECTION_SCO; 6771 case BD_ADDR_TYPE_ACL: 6772 return GAP_CONNECTION_ACL; 6773 default: 6774 return GAP_CONNECTION_INVALID; 6775 } 6776 } 6777 6778 hci_role_t gap_get_role(hci_con_handle_t connection_handle){ 6779 hci_connection_t * conn = hci_connection_for_handle(connection_handle); 6780 if (!conn) return HCI_ROLE_INVALID; 6781 return (hci_role_t) conn->role; 6782 } 6783 6784 6785 #ifdef ENABLE_CLASSIC 6786 uint8_t gap_request_role(const bd_addr_t addr, hci_role_t role){ 6787 hci_connection_t * conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 6788 if (!conn) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 6789 conn->request_role = role; 6790 hci_run(); 6791 return ERROR_CODE_SUCCESS; 6792 } 6793 #endif 6794 6795 #ifdef ENABLE_BLE 6796 6797 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){ 6798 hci_connection_t * conn = hci_connection_for_handle(con_handle); 6799 if (!conn) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 6800 6801 conn->le_phy_update_all_phys = all_phys; 6802 conn->le_phy_update_tx_phys = tx_phys; 6803 conn->le_phy_update_rx_phys = rx_phys; 6804 conn->le_phy_update_phy_options = phy_options; 6805 6806 hci_run(); 6807 6808 return 0; 6809 } 6810 6811 static uint8_t hci_whitelist_add(bd_addr_type_t address_type, const bd_addr_t address){ 6812 // check if already in list 6813 btstack_linked_list_iterator_t it; 6814 btstack_linked_list_iterator_init(&it, &hci_stack->le_whitelist); 6815 while (btstack_linked_list_iterator_has_next(&it)) { 6816 whitelist_entry_t *entry = (whitelist_entry_t *) btstack_linked_list_iterator_next(&it); 6817 if (entry->address_type != address_type) { 6818 continue; 6819 } 6820 if (memcmp(entry->address, address, 6) != 0) { 6821 continue; 6822 } 6823 // disallow if already scheduled to add 6824 if ((entry->state & LE_WHITELIST_ADD_TO_CONTROLLER) != 0){ 6825 return ERROR_CODE_COMMAND_DISALLOWED; 6826 } 6827 // still on controller, but scheduled to remove -> re-add 6828 entry->state |= LE_WHITELIST_ADD_TO_CONTROLLER; 6829 return ERROR_CODE_SUCCESS; 6830 } 6831 // alloc and add to list 6832 whitelist_entry_t * entry = btstack_memory_whitelist_entry_get(); 6833 if (!entry) return BTSTACK_MEMORY_ALLOC_FAILED; 6834 entry->address_type = address_type; 6835 (void)memcpy(entry->address, address, 6); 6836 entry->state = LE_WHITELIST_ADD_TO_CONTROLLER; 6837 btstack_linked_list_add(&hci_stack->le_whitelist, (btstack_linked_item_t*) entry); 6838 return ERROR_CODE_SUCCESS; 6839 } 6840 6841 static uint8_t hci_whitelist_remove(bd_addr_type_t address_type, const bd_addr_t address){ 6842 btstack_linked_list_iterator_t it; 6843 btstack_linked_list_iterator_init(&it, &hci_stack->le_whitelist); 6844 while (btstack_linked_list_iterator_has_next(&it)){ 6845 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&it); 6846 if (entry->address_type != address_type) { 6847 continue; 6848 } 6849 if (memcmp(entry->address, address, 6) != 0) { 6850 continue; 6851 } 6852 if (entry->state & LE_WHITELIST_ON_CONTROLLER){ 6853 // remove from controller if already present 6854 entry->state |= LE_WHITELIST_REMOVE_FROM_CONTROLLER; 6855 } else { 6856 // directly remove entry from whitelist 6857 btstack_linked_list_iterator_remove(&it); 6858 btstack_memory_whitelist_entry_free(entry); 6859 } 6860 return ERROR_CODE_SUCCESS; 6861 } 6862 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 6863 } 6864 6865 static void hci_whitelist_clear(void){ 6866 btstack_linked_list_iterator_t it; 6867 btstack_linked_list_iterator_init(&it, &hci_stack->le_whitelist); 6868 while (btstack_linked_list_iterator_has_next(&it)){ 6869 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&it); 6870 if (entry->state & LE_WHITELIST_ON_CONTROLLER){ 6871 // remove from controller if already present 6872 entry->state |= LE_WHITELIST_REMOVE_FROM_CONTROLLER; 6873 continue; 6874 } 6875 // directly remove entry from whitelist 6876 btstack_linked_list_iterator_remove(&it); 6877 btstack_memory_whitelist_entry_free(entry); 6878 } 6879 } 6880 6881 // free all entries unconditionally 6882 static void hci_whitelist_free(void){ 6883 btstack_linked_list_iterator_t lit; 6884 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 6885 while (btstack_linked_list_iterator_has_next(&lit)){ 6886 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&lit); 6887 btstack_linked_list_remove(&hci_stack->le_whitelist, (btstack_linked_item_t *) entry); 6888 btstack_memory_whitelist_entry_free(entry); 6889 } 6890 } 6891 6892 /** 6893 * @brief Clear Whitelist 6894 * @return 0 if ok 6895 */ 6896 uint8_t gap_whitelist_clear(void){ 6897 hci_whitelist_clear(); 6898 hci_run(); 6899 return ERROR_CODE_SUCCESS; 6900 } 6901 6902 /** 6903 * @brief Add Device to Whitelist 6904 * @param address_typ 6905 * @param address 6906 * @return 0 if ok 6907 */ 6908 uint8_t gap_whitelist_add(bd_addr_type_t address_type, const bd_addr_t address){ 6909 uint8_t status = hci_whitelist_add(address_type, address); 6910 if (status){ 6911 return status; 6912 } 6913 hci_run(); 6914 return ERROR_CODE_SUCCESS; 6915 } 6916 6917 /** 6918 * @brief Remove Device from Whitelist 6919 * @param address_typ 6920 * @param address 6921 * @return 0 if ok 6922 */ 6923 uint8_t gap_whitelist_remove(bd_addr_type_t address_type, const bd_addr_t address){ 6924 uint8_t status = hci_whitelist_remove(address_type, address); 6925 if (status){ 6926 return status; 6927 } 6928 hci_run(); 6929 return ERROR_CODE_SUCCESS; 6930 } 6931 6932 #ifdef ENABLE_LE_CENTRAL 6933 /** 6934 * @brief Connect with Whitelist 6935 * @note Explicit whitelist management and this connect with whitelist replace deprecated gap_auto_connection_* functions 6936 * @return - if ok 6937 */ 6938 uint8_t gap_connect_with_whitelist(void){ 6939 if (hci_stack->le_connecting_request != LE_CONNECTING_IDLE){ 6940 return ERROR_CODE_COMMAND_DISALLOWED; 6941 } 6942 hci_stack->le_connecting_request = LE_CONNECTING_WHITELIST; 6943 hci_run(); 6944 return ERROR_CODE_SUCCESS; 6945 } 6946 6947 /** 6948 * @brief Auto Connection Establishment - Start Connecting to device 6949 * @param address_typ 6950 * @param address 6951 * @return 0 if ok 6952 */ 6953 uint8_t gap_auto_connection_start(bd_addr_type_t address_type, const bd_addr_t address){ 6954 if (hci_stack->le_connecting_request == LE_CONNECTING_DIRECT){ 6955 return ERROR_CODE_COMMAND_DISALLOWED; 6956 } 6957 6958 uint8_t status = hci_whitelist_add(address_type, address); 6959 if (status == BTSTACK_MEMORY_ALLOC_FAILED) { 6960 return status; 6961 } 6962 6963 hci_stack->le_connecting_request = LE_CONNECTING_WHITELIST; 6964 6965 hci_run(); 6966 return ERROR_CODE_SUCCESS; 6967 } 6968 6969 /** 6970 * @brief Auto Connection Establishment - Stop Connecting to device 6971 * @param address_typ 6972 * @param address 6973 * @return 0 if ok 6974 */ 6975 uint8_t gap_auto_connection_stop(bd_addr_type_t address_type, const bd_addr_t address){ 6976 if (hci_stack->le_connecting_request == LE_CONNECTING_DIRECT){ 6977 return ERROR_CODE_COMMAND_DISALLOWED; 6978 } 6979 6980 hci_whitelist_remove(address_type, address); 6981 if (btstack_linked_list_empty(&hci_stack->le_whitelist)){ 6982 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 6983 } 6984 hci_run(); 6985 return 0; 6986 } 6987 6988 /** 6989 * @brief Auto Connection Establishment - Stop everything 6990 * @note Convenience function to stop all active auto connection attempts 6991 */ 6992 uint8_t gap_auto_connection_stop_all(void){ 6993 if (hci_stack->le_connecting_request == LE_CONNECTING_DIRECT) { 6994 return ERROR_CODE_COMMAND_DISALLOWED; 6995 } 6996 hci_whitelist_clear(); 6997 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 6998 hci_run(); 6999 return ERROR_CODE_SUCCESS; 7000 } 7001 7002 uint16_t gap_le_connection_interval(hci_con_handle_t con_handle){ 7003 hci_connection_t * conn = hci_connection_for_handle(con_handle); 7004 if (!conn) return 0; 7005 return conn->le_connection_interval; 7006 } 7007 #endif 7008 #endif 7009 7010 #ifdef ENABLE_CLASSIC 7011 /** 7012 * @brief Set Extended Inquiry Response data 7013 * @param eir_data size HCI_EXTENDED_INQUIRY_RESPONSE_DATA_LEN (240) bytes, is not copied make sure memory is accessible during stack startup 7014 * @note has to be done before stack starts up 7015 */ 7016 void gap_set_extended_inquiry_response(const uint8_t * data){ 7017 hci_stack->eir_data = data; 7018 hci_stack->gap_tasks_classic |= GAP_TASK_SET_EIR_DATA; 7019 hci_run(); 7020 } 7021 7022 /** 7023 * @brief Start GAP Classic Inquiry 7024 * @param duration in 1.28s units 7025 * @return 0 if ok 7026 * @events: GAP_EVENT_INQUIRY_RESULT, GAP_EVENT_INQUIRY_COMPLETE 7027 */ 7028 int gap_inquiry_start(uint8_t duration_in_1280ms_units){ 7029 if (hci_stack->state != HCI_STATE_WORKING) return ERROR_CODE_COMMAND_DISALLOWED; 7030 if (hci_stack->inquiry_state != GAP_INQUIRY_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 7031 if ((duration_in_1280ms_units < GAP_INQUIRY_DURATION_MIN) || (duration_in_1280ms_units > GAP_INQUIRY_DURATION_MAX)){ 7032 return ERROR_CODE_INVALID_HCI_COMMAND_PARAMETERS; 7033 } 7034 hci_stack->inquiry_state = duration_in_1280ms_units; 7035 hci_run(); 7036 return 0; 7037 } 7038 7039 /** 7040 * @brief Stop GAP Classic Inquiry 7041 * @return 0 if ok 7042 */ 7043 int gap_inquiry_stop(void){ 7044 if ((hci_stack->inquiry_state >= GAP_INQUIRY_DURATION_MIN) && (hci_stack->inquiry_state <= GAP_INQUIRY_DURATION_MAX)) { 7045 // emit inquiry complete event, before it even started 7046 uint8_t event[] = { GAP_EVENT_INQUIRY_COMPLETE, 1, 0}; 7047 hci_emit_event(event, sizeof(event), 1); 7048 return 0; 7049 } 7050 if (hci_stack->inquiry_state != GAP_INQUIRY_STATE_ACTIVE) return ERROR_CODE_COMMAND_DISALLOWED; 7051 hci_stack->inquiry_state = GAP_INQUIRY_STATE_W2_CANCEL; 7052 hci_run(); 7053 return 0; 7054 } 7055 7056 void gap_inquiry_set_lap(uint32_t lap){ 7057 hci_stack->inquiry_lap = lap; 7058 } 7059 7060 void gap_inquiry_set_scan_activity(uint16_t inquiry_scan_interval, uint16_t inquiry_scan_window){ 7061 hci_stack->inquiry_scan_interval = inquiry_scan_interval; 7062 hci_stack->inquiry_scan_window = inquiry_scan_window; 7063 hci_stack->gap_tasks_classic |= GAP_TASK_WRITE_INQUIRY_SCAN_ACTIVITY; 7064 hci_run(); 7065 } 7066 7067 7068 /** 7069 * @brief Remote Name Request 7070 * @param addr 7071 * @param page_scan_repetition_mode 7072 * @param clock_offset only used when bit 15 is set 7073 * @events: HCI_EVENT_REMOTE_NAME_REQUEST_COMPLETE 7074 */ 7075 int gap_remote_name_request(const bd_addr_t addr, uint8_t page_scan_repetition_mode, uint16_t clock_offset){ 7076 if (hci_stack->remote_name_state != GAP_REMOTE_NAME_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 7077 (void)memcpy(hci_stack->remote_name_addr, addr, 6); 7078 hci_stack->remote_name_page_scan_repetition_mode = page_scan_repetition_mode; 7079 hci_stack->remote_name_clock_offset = clock_offset; 7080 hci_stack->remote_name_state = GAP_REMOTE_NAME_STATE_W2_SEND; 7081 hci_run(); 7082 return 0; 7083 } 7084 7085 static int gap_pairing_set_state_and_run(const bd_addr_t addr, uint8_t state){ 7086 hci_stack->gap_pairing_state = state; 7087 (void)memcpy(hci_stack->gap_pairing_addr, addr, 6); 7088 hci_run(); 7089 return 0; 7090 } 7091 7092 /** 7093 * @brief Legacy Pairing Pin Code Response for binary data / non-strings 7094 * @param addr 7095 * @param pin_data 7096 * @param pin_len 7097 * @return 0 if ok 7098 */ 7099 int gap_pin_code_response_binary(const bd_addr_t addr, const uint8_t * pin_data, uint8_t pin_len){ 7100 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 7101 hci_stack->gap_pairing_input.gap_pairing_pin = pin_data; 7102 hci_stack->gap_pairing_pin_len = pin_len; 7103 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PIN); 7104 } 7105 7106 /** 7107 * @brief Legacy Pairing Pin Code Response 7108 * @param addr 7109 * @param pin 7110 * @return 0 if ok 7111 */ 7112 int gap_pin_code_response(const bd_addr_t addr, const char * pin){ 7113 return gap_pin_code_response_binary(addr, (const uint8_t*) pin, strlen(pin)); 7114 } 7115 7116 /** 7117 * @brief Abort Legacy Pairing 7118 * @param addr 7119 * @param pin 7120 * @return 0 if ok 7121 */ 7122 int gap_pin_code_negative(bd_addr_t addr){ 7123 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 7124 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PIN_NEGATIVE); 7125 } 7126 7127 /** 7128 * @brief SSP Passkey Response 7129 * @param addr 7130 * @param passkey 7131 * @return 0 if ok 7132 */ 7133 int gap_ssp_passkey_response(const bd_addr_t addr, uint32_t passkey){ 7134 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 7135 hci_stack->gap_pairing_input.gap_pairing_passkey = passkey; 7136 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PASSKEY); 7137 } 7138 7139 /** 7140 * @brief Abort SSP Passkey Entry/Pairing 7141 * @param addr 7142 * @param pin 7143 * @return 0 if ok 7144 */ 7145 int gap_ssp_passkey_negative(const bd_addr_t addr){ 7146 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 7147 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PASSKEY_NEGATIVE); 7148 } 7149 7150 /** 7151 * @brief Accept SSP Numeric Comparison 7152 * @param addr 7153 * @param passkey 7154 * @return 0 if ok 7155 */ 7156 int gap_ssp_confirmation_response(const bd_addr_t addr){ 7157 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 7158 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_CONFIRMATION); 7159 } 7160 7161 /** 7162 * @brief Abort SSP Numeric Comparison/Pairing 7163 * @param addr 7164 * @param pin 7165 * @return 0 if ok 7166 */ 7167 int gap_ssp_confirmation_negative(const bd_addr_t addr){ 7168 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 7169 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_CONFIRMATION_NEGATIVE); 7170 } 7171 7172 #if defined(ENABLE_EXPLICIT_IO_CAPABILITIES_REPLY) || defined(ENABLE_EXPLICIT_LINK_KEY_REPLY) 7173 static uint8_t gap_set_auth_flag_and_run(const bd_addr_t addr, hci_authentication_flags_t flag){ 7174 hci_connection_t * conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 7175 if (!conn) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 7176 connectionSetAuthenticationFlags(conn, flag); 7177 hci_run(); 7178 return ERROR_CODE_SUCCESS; 7179 } 7180 #endif 7181 7182 #ifdef ENABLE_EXPLICIT_IO_CAPABILITIES_REPLY 7183 uint8_t gap_ssp_io_capabilities_response(const bd_addr_t addr){ 7184 return gap_set_auth_flag_and_run(addr, AUTH_FLAG_SEND_IO_CAPABILITIES_REPLY); 7185 } 7186 7187 uint8_t gap_ssp_io_capabilities_negative(const bd_addr_t addr){ 7188 return gap_set_auth_flag_and_run(addr, AUTH_FLAG_SEND_IO_CAPABILITIES_NEGATIVE_REPLY); 7189 } 7190 #endif 7191 7192 #ifdef ENABLE_CLASSIC_PAIRING_OOB 7193 /** 7194 * @brief Report Remote OOB Data 7195 * @param bd_addr 7196 * @param c_192 Simple Pairing Hash C derived from P-192 public key 7197 * @param r_192 Simple Pairing Randomizer derived from P-192 public key 7198 * @param c_256 Simple Pairing Hash C derived from P-256 public key 7199 * @param r_256 Simple Pairing Randomizer derived from P-256 public key 7200 */ 7201 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){ 7202 hci_connection_t * connection = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 7203 if (connection == NULL) { 7204 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 7205 } 7206 connection->classic_oob_c_192 = c_192; 7207 connection->classic_oob_r_192 = r_192; 7208 7209 // ignore P-256 if not supported by us 7210 if (hci_stack->secure_connections_active){ 7211 connection->classic_oob_c_256 = c_256; 7212 connection->classic_oob_r_256 = r_256; 7213 } 7214 7215 return ERROR_CODE_SUCCESS; 7216 } 7217 /** 7218 * @brief Generate new OOB data 7219 * @note OOB data will be provided in GAP_EVENT_LOCAL_OOB_DATA and be used in future pairing procedures 7220 */ 7221 void gap_ssp_generate_oob_data(void){ 7222 hci_stack->classic_read_local_oob_data = true; 7223 hci_run(); 7224 } 7225 7226 #endif 7227 7228 #ifdef ENABLE_EXPLICIT_LINK_KEY_REPLY 7229 uint8_t gap_send_link_key_response(const bd_addr_t addr, link_key_t link_key, link_key_type_t type){ 7230 hci_connection_t * connection = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 7231 if (connection == NULL) { 7232 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 7233 } 7234 7235 memcpy(connection->link_key, link_key, sizeof(link_key_t)); 7236 connection->link_key_type = type; 7237 7238 return gap_set_auth_flag_and_run(addr, AUTH_FLAG_HANDLE_LINK_KEY_REQUEST); 7239 } 7240 7241 #endif // ENABLE_EXPLICIT_LINK_KEY_REPLY 7242 /** 7243 * @brief Set inquiry mode: standard, with RSSI, with RSSI + Extended Inquiry Results. Has to be called before power on. 7244 * @param inquiry_mode see bluetooth_defines.h 7245 */ 7246 void hci_set_inquiry_mode(inquiry_mode_t inquiry_mode){ 7247 hci_stack->inquiry_mode = inquiry_mode; 7248 } 7249 7250 /** 7251 * @brief Configure Voice Setting for use with SCO data in HSP/HFP 7252 */ 7253 void hci_set_sco_voice_setting(uint16_t voice_setting){ 7254 hci_stack->sco_voice_setting = voice_setting; 7255 } 7256 7257 /** 7258 * @brief Get SCO Voice Setting 7259 * @return current voice setting 7260 */ 7261 uint16_t hci_get_sco_voice_setting(void){ 7262 return hci_stack->sco_voice_setting; 7263 } 7264 7265 static int hci_have_usb_transport(void){ 7266 if (!hci_stack->hci_transport) return 0; 7267 const char * transport_name = hci_stack->hci_transport->name; 7268 if (!transport_name) return 0; 7269 return (transport_name[0] == 'H') && (transport_name[1] == '2'); 7270 } 7271 7272 /** @brief Get SCO packet length for current SCO Voice setting 7273 * @note Using SCO packets of the exact length is required for USB transfer 7274 * @return Length of SCO packets in bytes (not audio frames) 7275 */ 7276 uint16_t hci_get_sco_packet_length(void){ 7277 uint16_t sco_packet_length = 0; 7278 7279 #ifdef ENABLE_SCO_OVER_HCI 7280 // Transparent = mSBC => 1, CVSD with 16-bit samples requires twice as much bytes 7281 int multiplier = ((hci_stack->sco_voice_setting_active & 0x03) == 0x03) ? 1 : 2; 7282 7283 if (hci_have_usb_transport()){ 7284 // see Core Spec for H2 USB Transfer. 7285 // 3 byte SCO header + 24 bytes per connection 7286 int num_sco_connections = btstack_max(1, hci_number_sco_connections()); 7287 sco_packet_length = 3 + 24 * num_sco_connections * multiplier; 7288 } else { 7289 // 3 byte SCO header + SCO packet size over the air (60 bytes) 7290 sco_packet_length = 3 + 60 * multiplier; 7291 // assert that it still fits inside an SCO buffer 7292 if (sco_packet_length > hci_stack->sco_data_packet_length){ 7293 sco_packet_length = 3 + 60; 7294 } 7295 } 7296 #endif 7297 7298 #ifdef HAVE_SCO_TRANSPORT 7299 // Transparent = mSBC => 1, CVSD with 16-bit samples requires twice as much bytes 7300 int multiplier = ((hci_stack->sco_voice_setting_active & 0x03) == 0x03) ? 1 : 2; 7301 sco_packet_length = 3 + 60 * multiplier; 7302 #endif 7303 return sco_packet_length; 7304 } 7305 7306 /** 7307 * @brief Sets the master/slave policy 7308 * @param policy (0: attempt to become master, 1: let connecting device decide) 7309 */ 7310 void hci_set_master_slave_policy(uint8_t policy){ 7311 hci_stack->master_slave_policy = policy; 7312 } 7313 7314 #endif 7315 7316 HCI_STATE hci_get_state(void){ 7317 return hci_stack->state; 7318 } 7319 7320 #ifdef ENABLE_CLASSIC 7321 void gap_register_classic_connection_filter(int (*accept_callback)(bd_addr_t addr, hci_link_type_t link_type)){ 7322 hci_stack->gap_classic_accept_callback = accept_callback; 7323 } 7324 #endif 7325 7326 /** 7327 * @brief Set callback for Bluetooth Hardware Error 7328 */ 7329 void hci_set_hardware_error_callback(void (*fn)(uint8_t error)){ 7330 hci_stack->hardware_error_callback = fn; 7331 } 7332 7333 void hci_disconnect_all(void){ 7334 btstack_linked_list_iterator_t it; 7335 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 7336 while (btstack_linked_list_iterator_has_next(&it)){ 7337 hci_connection_t * con = (hci_connection_t*) btstack_linked_list_iterator_next(&it); 7338 if (con->state == SENT_DISCONNECT) continue; 7339 con->state = SEND_DISCONNECT; 7340 } 7341 hci_run(); 7342 } 7343 7344 uint16_t hci_get_manufacturer(void){ 7345 return hci_stack->manufacturer; 7346 } 7347 7348 #ifdef ENABLE_BLE 7349 static sm_connection_t * sm_get_connection_for_handle(hci_con_handle_t con_handle){ 7350 hci_connection_t * hci_con = hci_connection_for_handle(con_handle); 7351 if (!hci_con) return NULL; 7352 return &hci_con->sm_connection; 7353 } 7354 7355 // extracted from sm.c to allow enabling of l2cap le data channels without adding sm.c to the build 7356 // without sm.c default values from create_connection_for_bd_addr_and_type() resulg in non-encrypted, not-authenticated 7357 #endif 7358 7359 uint8_t gap_encryption_key_size(hci_con_handle_t con_handle){ 7360 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 7361 if (hci_connection == NULL) return 0; 7362 if (hci_is_le_connection(hci_connection)){ 7363 #ifdef ENABLE_BLE 7364 sm_connection_t * sm_conn = &hci_connection->sm_connection; 7365 if (sm_conn->sm_connection_encrypted) { 7366 return sm_conn->sm_actual_encryption_key_size; 7367 } 7368 #endif 7369 } else { 7370 #ifdef ENABLE_CLASSIC 7371 if ((hci_connection->authentication_flags & AUTH_FLAG_CONNECTION_ENCRYPTED)){ 7372 return hci_connection->encryption_key_size; 7373 } 7374 #endif 7375 } 7376 return 0; 7377 } 7378 7379 bool gap_authenticated(hci_con_handle_t con_handle){ 7380 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 7381 if (hci_connection == NULL) return false; 7382 7383 switch (hci_connection->address_type){ 7384 #ifdef ENABLE_BLE 7385 case BD_ADDR_TYPE_LE_PUBLIC: 7386 case BD_ADDR_TYPE_LE_RANDOM: 7387 if (hci_connection->sm_connection.sm_connection_encrypted == 0) return 0; // unencrypted connection cannot be authenticated 7388 return hci_connection->sm_connection.sm_connection_authenticated != 0; 7389 #endif 7390 #ifdef ENABLE_CLASSIC 7391 case BD_ADDR_TYPE_SCO: 7392 case BD_ADDR_TYPE_ACL: 7393 return gap_authenticated_for_link_key_type(hci_connection->link_key_type); 7394 #endif 7395 default: 7396 return false; 7397 } 7398 } 7399 7400 bool gap_secure_connection(hci_con_handle_t con_handle){ 7401 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 7402 if (hci_connection == NULL) return 0; 7403 7404 switch (hci_connection->address_type){ 7405 #ifdef ENABLE_BLE 7406 case BD_ADDR_TYPE_LE_PUBLIC: 7407 case BD_ADDR_TYPE_LE_RANDOM: 7408 if (hci_connection->sm_connection.sm_connection_encrypted == 0) return false; // unencrypted connection cannot be authenticated 7409 return hci_connection->sm_connection.sm_connection_sc != 0; 7410 #endif 7411 #ifdef ENABLE_CLASSIC 7412 case BD_ADDR_TYPE_SCO: 7413 case BD_ADDR_TYPE_ACL: 7414 return gap_secure_connection_for_link_key_type(hci_connection->link_key_type); 7415 #endif 7416 default: 7417 return false; 7418 } 7419 } 7420 7421 bool gap_bonded(hci_con_handle_t con_handle){ 7422 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 7423 if (hci_connection == NULL) return 0; 7424 7425 #ifdef ENABLE_CLASSIC 7426 link_key_t link_key; 7427 link_key_type_t link_key_type; 7428 #endif 7429 switch (hci_connection->address_type){ 7430 #ifdef ENABLE_BLE 7431 case BD_ADDR_TYPE_LE_PUBLIC: 7432 case BD_ADDR_TYPE_LE_RANDOM: 7433 return hci_connection->sm_connection.sm_le_db_index >= 0; 7434 #endif 7435 #ifdef ENABLE_CLASSIC 7436 case BD_ADDR_TYPE_SCO: 7437 case BD_ADDR_TYPE_ACL: 7438 return hci_stack->link_key_db && hci_stack->link_key_db->get_link_key(hci_connection->address, link_key, &link_key_type); 7439 #endif 7440 default: 7441 return false; 7442 } 7443 } 7444 7445 #ifdef ENABLE_BLE 7446 authorization_state_t gap_authorization_state(hci_con_handle_t con_handle){ 7447 sm_connection_t * sm_conn = sm_get_connection_for_handle(con_handle); 7448 if (!sm_conn) return AUTHORIZATION_UNKNOWN; // wrong connection 7449 if (!sm_conn->sm_connection_encrypted) return AUTHORIZATION_UNKNOWN; // unencrypted connection cannot be authorized 7450 if (!sm_conn->sm_connection_authenticated) return AUTHORIZATION_UNKNOWN; // unauthenticatd connection cannot be authorized 7451 return sm_conn->sm_connection_authorization_state; 7452 } 7453 #endif 7454 7455 #ifdef ENABLE_CLASSIC 7456 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){ 7457 hci_connection_t * conn = hci_connection_for_handle(con_handle); 7458 if (!conn) return GAP_CONNECTION_INVALID; 7459 conn->sniff_min_interval = sniff_min_interval; 7460 conn->sniff_max_interval = sniff_max_interval; 7461 conn->sniff_attempt = sniff_attempt; 7462 conn->sniff_timeout = sniff_timeout; 7463 hci_run(); 7464 return 0; 7465 } 7466 7467 /** 7468 * @brief Exit Sniff mode 7469 * @param con_handle 7470 @ @return 0 if ok 7471 */ 7472 uint8_t gap_sniff_mode_exit(hci_con_handle_t con_handle){ 7473 hci_connection_t * conn = hci_connection_for_handle(con_handle); 7474 if (!conn) return GAP_CONNECTION_INVALID; 7475 conn->sniff_min_interval = 0xffff; 7476 hci_run(); 7477 return 0; 7478 } 7479 7480 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){ 7481 hci_connection_t * conn = hci_connection_for_handle(con_handle); 7482 if (!conn) return GAP_CONNECTION_INVALID; 7483 conn->sniff_subrating_max_latency = max_latency; 7484 conn->sniff_subrating_min_remote_timeout = min_remote_timeout; 7485 conn->sniff_subrating_min_local_timeout = min_local_timeout; 7486 hci_run(); 7487 return ERROR_CODE_SUCCESS; 7488 } 7489 7490 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){ 7491 hci_connection_t * conn = hci_connection_for_handle(con_handle); 7492 if (!conn) return GAP_CONNECTION_INVALID; 7493 conn->qos_service_type = service_type; 7494 conn->qos_token_rate = token_rate; 7495 conn->qos_peak_bandwidth = peak_bandwidth; 7496 conn->qos_latency = latency; 7497 conn->qos_delay_variation = delay_variation; 7498 hci_run(); 7499 return ERROR_CODE_SUCCESS; 7500 } 7501 7502 void gap_set_page_scan_activity(uint16_t page_scan_interval, uint16_t page_scan_window){ 7503 hci_stack->new_page_scan_interval = page_scan_interval; 7504 hci_stack->new_page_scan_window = page_scan_window; 7505 hci_stack->gap_tasks_classic |= GAP_TASK_WRITE_PAGE_SCAN_ACTIVITY; 7506 hci_run(); 7507 } 7508 7509 void gap_set_page_scan_type(page_scan_type_t page_scan_type){ 7510 hci_stack->new_page_scan_type = (uint8_t) page_scan_type; 7511 hci_stack->gap_tasks_classic |= GAP_TASK_WRITE_PAGE_SCAN_TYPE; 7512 hci_run(); 7513 } 7514 7515 void gap_set_page_timeout(uint16_t page_timeout){ 7516 hci_stack->page_timeout = page_timeout; 7517 hci_stack->gap_tasks_classic |= GAP_TASK_WRITE_PAGE_TIMEOUT; 7518 hci_run(); 7519 } 7520 7521 #endif 7522 7523 void hci_halting_defer(void){ 7524 if (hci_stack->state != HCI_STATE_HALTING) return; 7525 switch (hci_stack->substate){ 7526 case HCI_HALTING_DISCONNECT_ALL_NO_TIMER: 7527 case HCI_HALTING_CLOSE: 7528 hci_stack->substate = HCI_HALTING_DISCONNECT_ALL_TIMER; 7529 break; 7530 default: 7531 break; 7532 } 7533 } 7534 7535 #ifdef ENABLE_LE_PRIVACY_ADDRESS_RESOLUTION 7536 void hci_load_le_device_db_entry_into_resolving_list(uint16_t le_device_db_index){ 7537 if (le_device_db_index >= MAX_NUM_RESOLVING_LIST_ENTRIES) return; 7538 if (le_device_db_index >= le_device_db_max_count()) return; 7539 uint8_t offset = le_device_db_index >> 3; 7540 uint8_t mask = 1 << (le_device_db_index & 7); 7541 hci_stack->le_resolving_list_add_entries[offset] |= mask; 7542 if (hci_stack->le_resolving_list_state == LE_RESOLVING_LIST_DONE){ 7543 // note: go back to remove entries, otherwise, a remove + add will skip the add 7544 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_REMOVE_ENTRIES; 7545 } 7546 } 7547 7548 void hci_remove_le_device_db_entry_from_resolving_list(uint16_t le_device_db_index){ 7549 if (le_device_db_index >= MAX_NUM_RESOLVING_LIST_ENTRIES) return; 7550 if (le_device_db_index >= le_device_db_max_count()) return; 7551 uint8_t offset = le_device_db_index >> 3; 7552 uint8_t mask = 1 << (le_device_db_index & 7); 7553 hci_stack->le_resolving_list_remove_entries[offset] |= mask; 7554 if (hci_stack->le_resolving_list_state == LE_RESOLVING_LIST_DONE){ 7555 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_REMOVE_ENTRIES; 7556 } 7557 } 7558 7559 uint8_t gap_load_resolving_list_from_le_device_db(void){ 7560 if (hci_command_supported(SUPPORTED_HCI_COMMAND_LE_SET_ADDRESS_RESOLUTION_ENABLE) == false){ 7561 return ERROR_CODE_UNSUPPORTED_FEATURE_OR_PARAMETER_VALUE; 7562 } 7563 if (hci_stack->le_resolving_list_state != LE_RESOLVING_LIST_SEND_ENABLE_ADDRESS_RESOLUTION){ 7564 // restart le resolving list update 7565 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_READ_SIZE; 7566 } 7567 return ERROR_CODE_SUCCESS; 7568 } 7569 #endif 7570 7571 #ifdef FUZZING_BUILD_MODE_UNSAFE_FOR_PRODUCTION 7572 void hci_setup_test_connections_fuzz(void){ 7573 hci_connection_t * conn; 7574 7575 // default address: 66:55:44:33:00:01 7576 bd_addr_t addr = { 0x66, 0x55, 0x44, 0x33, 0x00, 0x00}; 7577 7578 // setup Controller info 7579 hci_stack->num_cmd_packets = 255; 7580 hci_stack->acl_packets_total_num = 255; 7581 7582 // setup incoming Classic ACL connection with con handle 0x0001, 66:55:44:33:22:01 7583 addr[5] = 0x01; 7584 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 7585 conn->con_handle = addr[5]; 7586 conn->role = HCI_ROLE_SLAVE; 7587 conn->state = RECEIVED_CONNECTION_REQUEST; 7588 conn->sm_connection.sm_role = HCI_ROLE_SLAVE; 7589 7590 // setup incoming Classic SCO connection with con handle 0x0002 7591 addr[5] = 0x02; 7592 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_SCO); 7593 conn->con_handle = addr[5]; 7594 conn->role = HCI_ROLE_SLAVE; 7595 conn->state = RECEIVED_CONNECTION_REQUEST; 7596 conn->sm_connection.sm_role = HCI_ROLE_SLAVE; 7597 7598 // setup ready Classic ACL connection with con handle 0x0003 7599 addr[5] = 0x03; 7600 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 7601 conn->con_handle = addr[5]; 7602 conn->role = HCI_ROLE_SLAVE; 7603 conn->state = OPEN; 7604 conn->sm_connection.sm_role = HCI_ROLE_SLAVE; 7605 7606 // setup ready Classic SCO connection with con handle 0x0004 7607 addr[5] = 0x04; 7608 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_SCO); 7609 conn->con_handle = addr[5]; 7610 conn->role = HCI_ROLE_SLAVE; 7611 conn->state = OPEN; 7612 conn->sm_connection.sm_role = HCI_ROLE_SLAVE; 7613 7614 // setup ready LE ACL connection with con handle 0x005 and public address 7615 addr[5] = 0x05; 7616 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_LE_PUBLIC); 7617 conn->con_handle = addr[5]; 7618 conn->role = HCI_ROLE_SLAVE; 7619 conn->state = OPEN; 7620 conn->sm_connection.sm_role = HCI_ROLE_SLAVE; 7621 conn->sm_connection.sm_connection_encrypted = 1; 7622 } 7623 7624 void hci_free_connections_fuzz(void){ 7625 btstack_linked_list_iterator_t it; 7626 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 7627 while (btstack_linked_list_iterator_has_next(&it)){ 7628 hci_connection_t * con = (hci_connection_t*) btstack_linked_list_iterator_next(&it); 7629 btstack_linked_list_iterator_remove(&it); 7630 btstack_memory_hci_connection_free(con); 7631 } 7632 } 7633 void hci_simulate_working_fuzz(void){ 7634 hci_stack->le_scanning_param_update = false; 7635 hci_init_done(); 7636 hci_stack->num_cmd_packets = 255; 7637 } 7638 #endif 7639