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