1 /* 2 * Copyright (C) 2014 BlueKitchen GmbH 3 * 4 * Redistribution and use in source and binary forms, with or without 5 * modification, are permitted provided that the following conditions 6 * are met: 7 * 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 3. Neither the name of the copyright holders nor the names of 14 * contributors may be used to endorse or promote products derived 15 * from this software without specific prior written permission. 16 * 4. Any redistribution, use, or modification is done solely for 17 * personal benefit and not for any commercial purpose or for 18 * monetary gain. 19 * 20 * THIS SOFTWARE IS PROVIDED BY BLUEKITCHEN GMBH AND CONTRIBUTORS 21 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 22 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS 23 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL BLUEKITCHEN 24 * GMBH OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, 25 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, 26 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS 27 * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED 28 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, 29 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF 30 * THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 31 * SUCH DAMAGE. 32 * 33 * Please inquire about commercial licensing options at 34 * [email protected] 35 * 36 */ 37 38 #define BTSTACK_FILE__ "hci.c" 39 40 /* 41 * hci.c 42 * 43 * Created by Matthias Ringwald on 4/29/09. 44 * 45 */ 46 47 #include "btstack_config.h" 48 49 50 #ifdef ENABLE_CLASSIC 51 #ifdef HAVE_EMBEDDED_TICK 52 #include "btstack_run_loop_embedded.h" 53 #endif 54 #endif 55 56 #ifdef ENABLE_BLE 57 #include "gap.h" 58 #include "ble/le_device_db.h" 59 #endif 60 61 #include <stdarg.h> 62 #include <string.h> 63 #include <inttypes.h> 64 65 #include "btstack_debug.h" 66 #include "btstack_event.h" 67 #include "btstack_linked_list.h" 68 #include "btstack_memory.h" 69 #include "bluetooth_company_id.h" 70 #include "bluetooth_data_types.h" 71 #include "gap.h" 72 #include "hci.h" 73 #include "hci_cmd.h" 74 #include "hci_dump.h" 75 #include "ad_parser.h" 76 77 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 78 #ifndef HCI_HOST_ACL_PACKET_NUM 79 #error "ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL requires to define HCI_HOST_ACL_PACKET_NUM" 80 #endif 81 #ifndef HCI_HOST_ACL_PACKET_LEN 82 #error "ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL requires to define HCI_HOST_ACL_PACKET_LEN" 83 #endif 84 #ifndef HCI_HOST_SCO_PACKET_NUM 85 #error "ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL requires to define HCI_HOST_SCO_PACKET_NUM" 86 #endif 87 #ifndef HCI_HOST_SCO_PACKET_LEN 88 #error "ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL requires to define HCI_HOST_SCO_PACKET_LEN" 89 #endif 90 #endif 91 92 #if defined(ENABLE_SCO_OVER_HCI) && defined(ENABLE_SCO_OVER_PCM) 93 #error "SCO data can either be routed over HCI or over PCM, but not over both. Please only enable ENABLE_SCO_OVER_HCI or ENABLE_SCO_OVER_PCM." 94 #endif 95 96 #if defined(ENABLE_SCO_OVER_HCI) && defined(HAVE_SCO_TRANSPORT) 97 #error "SCO data can either be routed over HCI or over PCM, but not over both. Please only enable ENABLE_SCO_OVER_HCI or HAVE_SCO_TRANSPORT." 98 #endif 99 100 #define HCI_CONNECTION_TIMEOUT_MS 10000 101 102 #ifndef HCI_RESET_RESEND_TIMEOUT_MS 103 #define HCI_RESET_RESEND_TIMEOUT_MS 200 104 #endif 105 106 // Names are arbitrarily shortened to 32 bytes if not requested otherwise 107 #ifndef GAP_INQUIRY_MAX_NAME_LEN 108 #define GAP_INQUIRY_MAX_NAME_LEN 32 109 #endif 110 111 // GAP inquiry state: 0 = off, 0x01 - 0x30 = requested duration, 0xfe = active, 0xff = stop requested 112 #define GAP_INQUIRY_DURATION_MIN 0x01 113 #define GAP_INQUIRY_DURATION_MAX 0x30 114 #define GAP_INQUIRY_STATE_IDLE 0x00 115 #define GAP_INQUIRY_STATE_W4_ACTIVE 0x80 116 #define GAP_INQUIRY_STATE_ACTIVE 0x81 117 #define GAP_INQUIRY_STATE_W2_CANCEL 0x82 118 #define GAP_INQUIRY_STATE_W4_CANCELLED 0x83 119 120 // GAP Remote Name Request 121 #define GAP_REMOTE_NAME_STATE_IDLE 0 122 #define GAP_REMOTE_NAME_STATE_W2_SEND 1 123 #define GAP_REMOTE_NAME_STATE_W4_COMPLETE 2 124 125 // GAP Pairing 126 #define GAP_PAIRING_STATE_IDLE 0 127 #define GAP_PAIRING_STATE_SEND_PIN 1 128 #define GAP_PAIRING_STATE_SEND_PIN_NEGATIVE 2 129 #define GAP_PAIRING_STATE_SEND_PASSKEY 3 130 #define GAP_PAIRING_STATE_SEND_PASSKEY_NEGATIVE 4 131 #define GAP_PAIRING_STATE_SEND_CONFIRMATION 5 132 #define GAP_PAIRING_STATE_SEND_CONFIRMATION_NEGATIVE 6 133 #define GAP_PAIRING_STATE_WAIT_FOR_COMMAND_COMPLETE 7 134 135 // 136 // compact storage of relevant supported HCI Commands. 137 // X-Macro below provides enumeration and mapping table into the supported 138 // commands bitmap (64 bytes) from HCI Read Local Supported Commands 139 // 140 141 // format: command name, byte offset, bit nr in 64-byte supported commands 142 #define SUPPORTED_HCI_COMMANDS \ 143 X( SUPPORTED_HCI_COMMAND_READ_REMOTE_EXTENDED_FEATURES , 2, 5) \ 144 X( SUPPORTED_HCI_COMMAND_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE , 10, 4) \ 145 X( SUPPORTED_HCI_COMMAND_READ_BUFFER_SIZE , 14, 7) \ 146 X( SUPPORTED_HCI_COMMAND_WRITE_DEFAULT_ERRONEOUS_DATA_REPORTING, 18, 3) \ 147 X( SUPPORTED_HCI_COMMAND_READ_ENCRYPTION_KEY_SIZE , 20, 4) \ 148 X( SUPPORTED_HCI_COMMAND_WRITE_LE_HOST_SUPPORTED , 24, 6) \ 149 X( SUPPORTED_HCI_COMMAND_REMOTE_OOB_EXTENDED_DATA_REQUEST_REPLY, 32, 1) \ 150 X( SUPPORTED_HCI_COMMAND_WRITE_SECURE_CONNECTIONS_HOST , 32, 3) \ 151 X( SUPPORTED_HCI_COMMAND_READ_LOCAL_OOB_EXTENDED_DATA_COMMAND , 32, 6) \ 152 X( SUPPORTED_HCI_COMMAND_LE_WRITE_SUGGESTED_DEFAULT_DATA_LENGTH, 34, 0) \ 153 X( SUPPORTED_HCI_COMMAND_LE_READ_MAXIMUM_DATA_LENGTH , 35, 3) \ 154 X( SUPPORTED_HCI_COMMAND_LE_SET_ADDRESS_RESOLUTION_ENABLE , 35, 1) \ 155 X( SUPPORTED_HCI_COMMAND_LE_SET_DEFAULT_PHY , 35, 5) \ 156 X( SUPPORTED_HCI_COMMAND_LE_SET_EXTENDED_ADVERTISING_ENABLE , 36, 6) \ 157 158 // enumerate supported commands 159 #define X(name, offset, bit) name, 160 enum { 161 SUPPORTED_HCI_COMMANDS 162 SUPPORTED_HCI_COMMANDS_COUNT 163 }; 164 #undef X 165 166 // assert supported hci commands bitmap fits into provided storage 167 #if SUPPORTED_HCI_COMMANDS_COUNT > 16 168 #error "Storage for supported HCI commands too small" 169 #endif 170 171 // prototypes 172 #ifdef ENABLE_CLASSIC 173 static void hci_update_scan_enable(void); 174 static void hci_emit_discoverable_enabled(uint8_t enabled); 175 static int hci_local_ssp_activated(void); 176 static bool hci_remote_ssp_supported(hci_con_handle_t con_handle); 177 static bool hci_ssp_supported(hci_connection_t * connection); 178 static void hci_notify_if_sco_can_send_now(void); 179 static void hci_emit_connection_complete(bd_addr_t address, hci_con_handle_t con_handle, uint8_t status); 180 static gap_security_level_t gap_security_level_for_connection(hci_connection_t * connection); 181 static void hci_emit_security_level(hci_con_handle_t con_handle, gap_security_level_t level); 182 static void hci_connection_timeout_handler(btstack_timer_source_t *timer); 183 static void hci_connection_timestamp(hci_connection_t *connection); 184 static void hci_emit_l2cap_check_timeout(hci_connection_t *conn); 185 static void gap_inquiry_explode(uint8_t *packet, uint16_t size); 186 #endif 187 188 static int hci_power_control_on(void); 189 static void hci_power_control_off(void); 190 static void hci_state_reset(void); 191 static void hci_halting_timeout_handler(btstack_timer_source_t * ds); 192 static void hci_emit_transport_packet_sent(void); 193 static void hci_emit_disconnection_complete(hci_con_handle_t con_handle, uint8_t reason); 194 static void hci_emit_nr_connections_changed(void); 195 static void hci_emit_hci_open_failed(void); 196 static void hci_emit_dedicated_bonding_result(bd_addr_t address, uint8_t status); 197 static void hci_emit_event(uint8_t * event, uint16_t size, int dump); 198 static void hci_emit_acl_packet(uint8_t * packet, uint16_t size); 199 static void hci_run(void); 200 static int hci_is_le_connection(hci_connection_t * connection); 201 202 #ifdef ENABLE_CLASSIC 203 static int hci_have_usb_transport(void); 204 static void hci_trigger_remote_features_for_connection(hci_connection_t * connection); 205 #endif 206 207 #ifdef ENABLE_BLE 208 #ifdef ENABLE_LE_CENTRAL 209 // called from test/ble_client/advertising_data_parser.c 210 void le_handle_advertisement_report(uint8_t *packet, uint16_t size); 211 static uint8_t hci_whitelist_remove(bd_addr_type_t address_type, const bd_addr_t address); 212 static void hci_whitelist_free(void); 213 static hci_connection_t * gap_get_outgoing_connection(void); 214 static void hci_le_scan_stop(void); 215 static bool hci_run_general_gap_le(void); 216 #endif 217 #ifdef ENABLE_LE_PERIPHERAL 218 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 219 static le_advertising_set_t * hci_advertising_set_for_handle(uint8_t advertising_handle); 220 #endif /* ENABLE_LE_EXTENDED_ADVERTISING */ 221 #endif /* ENABLE_LE_PERIPHERAL */ 222 #endif /* ENABLE_BLE */ 223 224 // the STACK is here 225 #ifndef HAVE_MALLOC 226 static hci_stack_t hci_stack_static; 227 #endif 228 static hci_stack_t * hci_stack = NULL; 229 230 #ifdef ENABLE_CLASSIC 231 // default name 232 static const char * default_classic_name = "BTstack 00:00:00:00:00:00"; 233 234 // test helper 235 static uint8_t disable_l2cap_timeouts = 0; 236 #endif 237 238 // reset connection state on create and on reconnect 239 // don't overwrite addr, con handle, role 240 static void hci_connection_init(hci_connection_t * conn){ 241 conn->authentication_flags = AUTH_FLAG_NONE; 242 conn->bonding_flags = 0; 243 conn->requested_security_level = LEVEL_0; 244 #ifdef ENABLE_CLASSIC 245 conn->request_role = HCI_ROLE_INVALID; 246 conn->sniff_subrating_max_latency = 0xffff; 247 conn->qos_service_type = HCI_SERVICE_TYPE_INVALID; 248 conn->link_key_type = INVALID_LINK_KEY; 249 btstack_run_loop_set_timer_handler(&conn->timeout, hci_connection_timeout_handler); 250 btstack_run_loop_set_timer_context(&conn->timeout, conn); 251 hci_connection_timestamp(conn); 252 #endif 253 conn->acl_recombination_length = 0; 254 conn->acl_recombination_pos = 0; 255 conn->num_packets_sent = 0; 256 257 conn->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NONE; 258 #ifdef ENABLE_BLE 259 conn->le_phy_update_all_phys = 0xff; 260 #endif 261 #ifdef ENABLE_LE_LIMIT_ACL_FRAGMENT_BY_MAX_OCTETS 262 conn->le_max_tx_octets = 27; 263 #endif 264 #ifdef ENABLE_CLASSIC_PAIRING_OOB 265 conn->classic_oob_c_192 = NULL; 266 conn->classic_oob_r_192 = NULL; 267 conn->classic_oob_c_256 = NULL; 268 conn->classic_oob_r_256 = NULL; 269 #endif 270 } 271 272 /** 273 * create connection for given address 274 * 275 * @return connection OR NULL, if no memory left 276 */ 277 static hci_connection_t * create_connection_for_bd_addr_and_type(const bd_addr_t addr, bd_addr_type_t addr_type){ 278 log_info("create_connection_for_addr %s, type %x", bd_addr_to_str(addr), addr_type); 279 280 hci_connection_t * conn = btstack_memory_hci_connection_get(); 281 if (!conn) return NULL; 282 hci_connection_init(conn); 283 284 bd_addr_copy(conn->address, addr); 285 conn->address_type = addr_type; 286 conn->con_handle = HCI_CON_HANDLE_INVALID; 287 conn->role = HCI_ROLE_INVALID; 288 289 btstack_linked_list_add(&hci_stack->connections, (btstack_linked_item_t *) conn); 290 291 return conn; 292 } 293 294 295 /** 296 * get le connection parameter range 297 * 298 * @return le connection parameter range struct 299 */ 300 void gap_get_connection_parameter_range(le_connection_parameter_range_t * range){ 301 *range = hci_stack->le_connection_parameter_range; 302 } 303 304 /** 305 * set le connection parameter range 306 * 307 */ 308 309 void gap_set_connection_parameter_range(le_connection_parameter_range_t *range){ 310 hci_stack->le_connection_parameter_range = *range; 311 } 312 313 /** 314 * @brief Test if connection parameters are inside in existing rage 315 * @param conn_interval_min (unit: 1.25ms) 316 * @param conn_interval_max (unit: 1.25ms) 317 * @param conn_latency 318 * @param supervision_timeout (unit: 10ms) 319 * @return 1 if included 320 */ 321 int gap_connection_parameter_range_included(le_connection_parameter_range_t * existing_range, uint16_t le_conn_interval_min, uint16_t le_conn_interval_max, uint16_t le_conn_latency, uint16_t le_supervision_timeout){ 322 if (le_conn_interval_min < existing_range->le_conn_interval_min) return 0; 323 if (le_conn_interval_max > existing_range->le_conn_interval_max) return 0; 324 325 if (le_conn_latency < existing_range->le_conn_latency_min) return 0; 326 if (le_conn_latency > existing_range->le_conn_latency_max) return 0; 327 328 if (le_supervision_timeout < existing_range->le_supervision_timeout_min) return 0; 329 if (le_supervision_timeout > existing_range->le_supervision_timeout_max) return 0; 330 331 return 1; 332 } 333 334 /** 335 * @brief Set max number of connections in LE Peripheral role (if Bluetooth Controller supports it) 336 * @note: default: 1 337 * @param max_peripheral_connections 338 */ 339 #ifdef ENABLE_LE_PERIPHERAL 340 void gap_set_max_number_peripheral_connections(int max_peripheral_connections){ 341 hci_stack->le_max_number_peripheral_connections = max_peripheral_connections; 342 } 343 #endif 344 345 /** 346 * get hci connections iterator 347 * 348 * @return hci connections iterator 349 */ 350 351 void hci_connections_get_iterator(btstack_linked_list_iterator_t *it){ 352 btstack_linked_list_iterator_init(it, &hci_stack->connections); 353 } 354 355 /** 356 * get connection for a given handle 357 * 358 * @return connection OR NULL, if not found 359 */ 360 hci_connection_t * hci_connection_for_handle(hci_con_handle_t con_handle){ 361 btstack_linked_list_iterator_t it; 362 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 363 while (btstack_linked_list_iterator_has_next(&it)){ 364 hci_connection_t * item = (hci_connection_t *) btstack_linked_list_iterator_next(&it); 365 if ( item->con_handle == con_handle ) { 366 return item; 367 } 368 } 369 return NULL; 370 } 371 372 /** 373 * get connection for given address 374 * 375 * @return connection OR NULL, if not found 376 */ 377 hci_connection_t * hci_connection_for_bd_addr_and_type(const bd_addr_t addr, bd_addr_type_t addr_type){ 378 btstack_linked_list_iterator_t it; 379 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 380 while (btstack_linked_list_iterator_has_next(&it)){ 381 hci_connection_t * connection = (hci_connection_t *) btstack_linked_list_iterator_next(&it); 382 if (connection->address_type != addr_type) continue; 383 if (memcmp(addr, connection->address, 6) != 0) continue; 384 return connection; 385 } 386 return NULL; 387 } 388 389 #ifdef ENABLE_CLASSIC 390 391 inline static void connectionClearAuthenticationFlags(hci_connection_t * conn, hci_authentication_flags_t flags){ 392 conn->authentication_flags = (hci_authentication_flags_t)(conn->authentication_flags & ~flags); 393 } 394 395 inline static void connectionSetAuthenticationFlags(hci_connection_t * conn, hci_authentication_flags_t flags){ 396 conn->authentication_flags = (hci_authentication_flags_t)(conn->authentication_flags | flags); 397 } 398 399 #ifdef ENABLE_SCO_OVER_HCI 400 static int hci_number_sco_connections(void){ 401 int connections = 0; 402 btstack_linked_list_iterator_t it; 403 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 404 while (btstack_linked_list_iterator_has_next(&it)){ 405 hci_connection_t * connection = (hci_connection_t *) btstack_linked_list_iterator_next(&it); 406 if (connection->address_type != BD_ADDR_TYPE_SCO) continue; 407 connections++; 408 } 409 return connections; 410 } 411 #endif 412 413 static void hci_connection_timeout_handler(btstack_timer_source_t *timer){ 414 hci_connection_t * connection = (hci_connection_t *) btstack_run_loop_get_timer_context(timer); 415 #ifdef HAVE_EMBEDDED_TICK 416 if (btstack_run_loop_embedded_get_ticks() > connection->timestamp + btstack_run_loop_embedded_ticks_for_ms(HCI_CONNECTION_TIMEOUT_MS)){ 417 // connections might be timed out 418 hci_emit_l2cap_check_timeout(connection); 419 } 420 #else 421 if (btstack_run_loop_get_time_ms() > (connection->timestamp + HCI_CONNECTION_TIMEOUT_MS)){ 422 // connections might be timed out 423 hci_emit_l2cap_check_timeout(connection); 424 } 425 #endif 426 } 427 428 static void hci_connection_timestamp(hci_connection_t *connection){ 429 #ifdef HAVE_EMBEDDED_TICK 430 connection->timestamp = btstack_run_loop_embedded_get_ticks(); 431 #else 432 connection->timestamp = btstack_run_loop_get_time_ms(); 433 #endif 434 } 435 436 /** 437 * add authentication flags and reset timer 438 * @note: assumes classic connection 439 * @note: bd_addr is passed in as litle endian uint8_t * as it is called from parsing packets 440 */ 441 static void hci_add_connection_flags_for_flipped_bd_addr(uint8_t *bd_addr, hci_authentication_flags_t flags){ 442 bd_addr_t addr; 443 reverse_bd_addr(bd_addr, addr); 444 hci_connection_t * conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 445 if (conn) { 446 connectionSetAuthenticationFlags(conn, flags); 447 hci_connection_timestamp(conn); 448 } 449 } 450 451 static bool hci_pairing_active(hci_connection_t * hci_connection){ 452 return (hci_connection->authentication_flags & AUTH_FLAG_PAIRING_ACTIVE_MASK) != 0; 453 } 454 455 static void hci_pairing_started(hci_connection_t * hci_connection, bool ssp){ 456 if (hci_pairing_active(hci_connection)) return; 457 if (ssp){ 458 hci_connection->authentication_flags |= AUTH_FLAG_SSP_PAIRING_ACTIVE; 459 } else { 460 hci_connection->authentication_flags |= AUTH_FLAG_LEGACY_PAIRING_ACTIVE; 461 } 462 // if we are initiator, we have sent an HCI Authenticate Request 463 bool initiator = (hci_connection->bonding_flags & BONDING_SENT_AUTHENTICATE_REQUEST) != 0; 464 465 // if we are responder, use minimal service security level as required level 466 if (!initiator){ 467 hci_connection->requested_security_level = (gap_security_level_t) btstack_max((uint32_t) hci_connection->requested_security_level, (uint32_t) hci_stack->gap_minimal_service_security_level); 468 } 469 470 log_info("pairing started, ssp %u, initiator %u, requested level %u", (int) ssp, (int) initiator, hci_connection->requested_security_level); 471 472 uint8_t event[12]; 473 event[0] = GAP_EVENT_PAIRING_STARTED; 474 event[1] = 10; 475 little_endian_store_16(event, 2, (uint16_t) hci_connection->con_handle); 476 reverse_bd_addr(hci_connection->address, &event[4]); 477 event[10] = (uint8_t) ssp; 478 event[11] = (uint8_t) initiator; 479 hci_emit_event(event, sizeof(event), 1); 480 } 481 482 static void hci_pairing_complete(hci_connection_t * hci_connection, uint8_t status){ 483 hci_connection->requested_security_level = LEVEL_0; 484 if (!hci_pairing_active(hci_connection)) return; 485 hci_connection->authentication_flags &= ~AUTH_FLAG_PAIRING_ACTIVE_MASK; 486 #ifdef ENABLE_CLASSIC_PAIRING_OOB 487 hci_connection->classic_oob_c_192 = NULL; 488 hci_connection->classic_oob_r_192 = NULL; 489 hci_connection->classic_oob_c_256 = NULL; 490 hci_connection->classic_oob_r_256 = NULL; 491 #endif 492 log_info("pairing complete, status %02x", status); 493 494 uint8_t event[11]; 495 event[0] = GAP_EVENT_PAIRING_COMPLETE; 496 event[1] = 9; 497 little_endian_store_16(event, 2, (uint16_t) hci_connection->con_handle); 498 reverse_bd_addr(hci_connection->address, &event[4]); 499 event[10] = status; 500 hci_emit_event(event, sizeof(event), 1); 501 } 502 503 bool hci_authentication_active_for_handle(hci_con_handle_t handle){ 504 hci_connection_t * conn = hci_connection_for_handle(handle); 505 if (!conn) return false; 506 return hci_pairing_active(conn); 507 } 508 509 void gap_drop_link_key_for_bd_addr(bd_addr_t addr){ 510 if (!hci_stack->link_key_db) return; 511 log_info("gap_drop_link_key_for_bd_addr: %s", bd_addr_to_str(addr)); 512 hci_stack->link_key_db->delete_link_key(addr); 513 } 514 515 void gap_store_link_key_for_bd_addr(bd_addr_t addr, link_key_t link_key, link_key_type_t type){ 516 if (!hci_stack->link_key_db) return; 517 log_info("gap_store_link_key_for_bd_addr: %s, type %u", bd_addr_to_str(addr), type); 518 hci_stack->link_key_db->put_link_key(addr, link_key, type); 519 } 520 521 bool gap_get_link_key_for_bd_addr(bd_addr_t addr, link_key_t link_key, link_key_type_t * type){ 522 if (!hci_stack->link_key_db) return false; 523 int result = hci_stack->link_key_db->get_link_key(addr, link_key, type) != 0; 524 log_info("link key for %s available %u, type %u", bd_addr_to_str(addr), result, (int) *type); 525 return result; 526 } 527 528 void gap_delete_all_link_keys(void){ 529 bd_addr_t addr; 530 link_key_t link_key; 531 link_key_type_t type; 532 btstack_link_key_iterator_t it; 533 int ok = gap_link_key_iterator_init(&it); 534 if (!ok) { 535 log_error("could not initialize iterator"); 536 return; 537 } 538 while (gap_link_key_iterator_get_next(&it, addr, link_key, &type)){ 539 gap_drop_link_key_for_bd_addr(addr); 540 } 541 gap_link_key_iterator_done(&it); 542 } 543 544 int gap_link_key_iterator_init(btstack_link_key_iterator_t * it){ 545 if (!hci_stack->link_key_db) return 0; 546 if (!hci_stack->link_key_db->iterator_init) return 0; 547 return hci_stack->link_key_db->iterator_init(it); 548 } 549 int gap_link_key_iterator_get_next(btstack_link_key_iterator_t * it, bd_addr_t bd_addr, link_key_t link_key, link_key_type_t * type){ 550 if (!hci_stack->link_key_db) return 0; 551 return hci_stack->link_key_db->iterator_get_next(it, bd_addr, link_key, type); 552 } 553 void gap_link_key_iterator_done(btstack_link_key_iterator_t * it){ 554 if (!hci_stack->link_key_db) return; 555 hci_stack->link_key_db->iterator_done(it); 556 } 557 #endif 558 559 static bool hci_is_le_connection_type(bd_addr_type_t address_type){ 560 switch (address_type){ 561 case BD_ADDR_TYPE_LE_PUBLIC: 562 case BD_ADDR_TYPE_LE_RANDOM: 563 case BD_ADDR_TYPE_LE_PRIVAT_FALLBACK_PUBLIC: 564 case BD_ADDR_TYPE_LE_PRIVAT_FALLBACK_RANDOM: 565 return true; 566 default: 567 return false; 568 } 569 } 570 571 static int hci_is_le_connection(hci_connection_t * connection){ 572 return hci_is_le_connection_type(connection->address_type); 573 } 574 575 /** 576 * count connections 577 */ 578 static int nr_hci_connections(void){ 579 int count = 0; 580 btstack_linked_item_t *it; 581 for (it = (btstack_linked_item_t *) hci_stack->connections; it != NULL ; it = it->next){ 582 count++; 583 } 584 return count; 585 } 586 587 uint16_t hci_number_free_acl_slots_for_connection_type(bd_addr_type_t address_type){ 588 589 unsigned int num_packets_sent_classic = 0; 590 unsigned int num_packets_sent_le = 0; 591 592 btstack_linked_item_t *it; 593 for (it = (btstack_linked_item_t *) hci_stack->connections; it != NULL; it = it->next){ 594 hci_connection_t * connection = (hci_connection_t *) it; 595 if (hci_is_le_connection(connection)){ 596 num_packets_sent_le += connection->num_packets_sent; 597 } 598 if (connection->address_type == BD_ADDR_TYPE_ACL){ 599 num_packets_sent_classic += connection->num_packets_sent; 600 } 601 } 602 log_debug("ACL classic buffers: %u used of %u", num_packets_sent_classic, hci_stack->acl_packets_total_num); 603 int free_slots_classic = hci_stack->acl_packets_total_num - num_packets_sent_classic; 604 int free_slots_le = 0; 605 606 if (free_slots_classic < 0){ 607 log_error("hci_number_free_acl_slots: outgoing classic packets (%u) > total classic packets (%u)", num_packets_sent_classic, hci_stack->acl_packets_total_num); 608 return 0; 609 } 610 611 if (hci_stack->le_acl_packets_total_num){ 612 // if we have LE slots, they are used 613 free_slots_le = hci_stack->le_acl_packets_total_num - num_packets_sent_le; 614 if (free_slots_le < 0){ 615 log_error("hci_number_free_acl_slots: outgoing le packets (%u) > total le packets (%u)", num_packets_sent_le, hci_stack->le_acl_packets_total_num); 616 return 0; 617 } 618 } else { 619 // otherwise, classic slots are used for LE, too 620 free_slots_classic -= num_packets_sent_le; 621 if (free_slots_classic < 0){ 622 log_error("hci_number_free_acl_slots: outgoing classic + le packets (%u + %u) > total packets (%u)", num_packets_sent_classic, num_packets_sent_le, hci_stack->acl_packets_total_num); 623 return 0; 624 } 625 } 626 627 switch (address_type){ 628 case BD_ADDR_TYPE_UNKNOWN: 629 log_error("hci_number_free_acl_slots: unknown address type"); 630 return 0; 631 632 case BD_ADDR_TYPE_ACL: 633 return (uint16_t) free_slots_classic; 634 635 default: 636 if (hci_stack->le_acl_packets_total_num > 0){ 637 return (uint16_t) free_slots_le; 638 } 639 return (uint16_t) free_slots_classic; 640 } 641 } 642 643 int hci_number_free_acl_slots_for_handle(hci_con_handle_t con_handle){ 644 // get connection type 645 hci_connection_t * connection = hci_connection_for_handle(con_handle); 646 if (!connection){ 647 log_error("hci_number_free_acl_slots: handle 0x%04x not in connection list", con_handle); 648 return 0; 649 } 650 return hci_number_free_acl_slots_for_connection_type(connection->address_type); 651 } 652 653 #ifdef ENABLE_CLASSIC 654 static int hci_number_free_sco_slots(void){ 655 unsigned int num_sco_packets_sent = 0; 656 btstack_linked_item_t *it; 657 if (hci_stack->synchronous_flow_control_enabled){ 658 // explicit flow control 659 for (it = (btstack_linked_item_t *) hci_stack->connections; it ; it = it->next){ 660 hci_connection_t * connection = (hci_connection_t *) it; 661 if (connection->address_type != BD_ADDR_TYPE_SCO) continue; 662 num_sco_packets_sent += connection->num_packets_sent; 663 } 664 if (num_sco_packets_sent > hci_stack->sco_packets_total_num){ 665 log_info("hci_number_free_sco_slots:packets (%u) > total packets (%u)", num_sco_packets_sent, hci_stack->sco_packets_total_num); 666 return 0; 667 } 668 return hci_stack->sco_packets_total_num - num_sco_packets_sent; 669 } else { 670 // implicit flow control -- TODO 671 int num_ready = 0; 672 for (it = (btstack_linked_item_t *) hci_stack->connections; it ; it = it->next){ 673 hci_connection_t * connection = (hci_connection_t *) it; 674 if (connection->address_type != BD_ADDR_TYPE_SCO) continue; 675 if (connection->sco_tx_ready == 0) continue; 676 num_ready++; 677 } 678 return num_ready; 679 } 680 } 681 #endif 682 683 // only used to send HCI Host Number Completed Packets 684 static int hci_can_send_comand_packet_transport(void){ 685 if (hci_stack->hci_packet_buffer_reserved) return 0; 686 687 // check for async hci transport implementations 688 if (hci_stack->hci_transport->can_send_packet_now){ 689 if (!hci_stack->hci_transport->can_send_packet_now(HCI_COMMAND_DATA_PACKET)){ 690 return 0; 691 } 692 } 693 return 1; 694 } 695 696 // new functions replacing hci_can_send_packet_now[_using_packet_buffer] 697 bool hci_can_send_command_packet_now(void){ 698 if (hci_can_send_comand_packet_transport() == 0) return false; 699 return hci_stack->num_cmd_packets > 0u; 700 } 701 702 static int hci_transport_can_send_prepared_packet_now(uint8_t packet_type){ 703 // check for async hci transport implementations 704 if (!hci_stack->hci_transport->can_send_packet_now) return true; 705 return hci_stack->hci_transport->can_send_packet_now(packet_type); 706 } 707 708 static bool hci_can_send_prepared_acl_packet_for_address_type(bd_addr_type_t address_type){ 709 if (!hci_transport_can_send_prepared_packet_now(HCI_ACL_DATA_PACKET)) return false; 710 return hci_number_free_acl_slots_for_connection_type(address_type) > 0; 711 } 712 713 bool hci_can_send_acl_le_packet_now(void){ 714 if (hci_stack->hci_packet_buffer_reserved) return false; 715 return hci_can_send_prepared_acl_packet_for_address_type(BD_ADDR_TYPE_LE_PUBLIC); 716 } 717 718 bool hci_can_send_prepared_acl_packet_now(hci_con_handle_t con_handle) { 719 if (!hci_transport_can_send_prepared_packet_now(HCI_ACL_DATA_PACKET)) return false; 720 return hci_number_free_acl_slots_for_handle(con_handle) > 0; 721 } 722 723 bool hci_can_send_acl_packet_now(hci_con_handle_t con_handle){ 724 if (hci_stack->hci_packet_buffer_reserved) return false; 725 return hci_can_send_prepared_acl_packet_now(con_handle); 726 } 727 728 #ifdef ENABLE_CLASSIC 729 bool hci_can_send_acl_classic_packet_now(void){ 730 if (hci_stack->hci_packet_buffer_reserved) return false; 731 return hci_can_send_prepared_acl_packet_for_address_type(BD_ADDR_TYPE_ACL); 732 } 733 734 bool hci_can_send_prepared_sco_packet_now(void){ 735 if (!hci_transport_can_send_prepared_packet_now(HCI_SCO_DATA_PACKET)) return false; 736 if (hci_have_usb_transport()){ 737 return hci_stack->sco_can_send_now; 738 } else { 739 return hci_number_free_sco_slots() > 0; 740 } 741 } 742 743 bool hci_can_send_sco_packet_now(void){ 744 if (hci_stack->hci_packet_buffer_reserved) return false; 745 return hci_can_send_prepared_sco_packet_now(); 746 } 747 748 void hci_request_sco_can_send_now_event(void){ 749 hci_stack->sco_waiting_for_can_send_now = 1; 750 hci_notify_if_sco_can_send_now(); 751 } 752 #endif 753 754 // used for internal checks in l2cap.c 755 bool hci_is_packet_buffer_reserved(void){ 756 return hci_stack->hci_packet_buffer_reserved; 757 } 758 759 // reserves outgoing packet buffer. 760 // @return 1 if successful 761 bool hci_reserve_packet_buffer(void){ 762 if (hci_stack->hci_packet_buffer_reserved) { 763 log_error("hci_reserve_packet_buffer called but buffer already reserved"); 764 return false; 765 } 766 hci_stack->hci_packet_buffer_reserved = true; 767 return true; 768 } 769 770 void hci_release_packet_buffer(void){ 771 hci_stack->hci_packet_buffer_reserved = false; 772 } 773 774 // assumption: synchronous implementations don't provide can_send_packet_now as they don't keep the buffer after the call 775 static int hci_transport_synchronous(void){ 776 return hci_stack->hci_transport->can_send_packet_now == NULL; 777 } 778 779 static uint8_t hci_send_acl_packet_fragments(hci_connection_t *connection){ 780 781 // log_info("hci_send_acl_packet_fragments %u/%u (con 0x%04x)", hci_stack->acl_fragmentation_pos, hci_stack->acl_fragmentation_total_size, connection->con_handle); 782 783 // max ACL data packet length depends on connection type (LE vs. Classic) and available buffers 784 uint16_t max_acl_data_packet_length = hci_stack->acl_data_packet_length; 785 if (hci_is_le_connection(connection) && (hci_stack->le_data_packets_length > 0u)){ 786 max_acl_data_packet_length = hci_stack->le_data_packets_length; 787 } 788 789 #ifdef ENABLE_LE_LIMIT_ACL_FRAGMENT_BY_MAX_OCTETS 790 if (hci_is_le_connection(connection) && (connection->le_max_tx_octets < max_acl_data_packet_length)){ 791 max_acl_data_packet_length = connection->le_max_tx_octets; 792 } 793 #endif 794 795 log_debug("hci_send_acl_packet_fragments entered"); 796 797 uint8_t status = ERROR_CODE_SUCCESS; 798 // multiple packets could be send on a synchronous HCI transport 799 while (true){ 800 801 log_debug("hci_send_acl_packet_fragments loop entered"); 802 803 // get current data 804 const uint16_t acl_header_pos = hci_stack->acl_fragmentation_pos - 4u; 805 int current_acl_data_packet_length = hci_stack->acl_fragmentation_total_size - hci_stack->acl_fragmentation_pos; 806 bool more_fragments = false; 807 808 // if ACL packet is larger than Bluetooth packet buffer, only send max_acl_data_packet_length 809 if (current_acl_data_packet_length > max_acl_data_packet_length){ 810 more_fragments = true; 811 current_acl_data_packet_length = max_acl_data_packet_length; 812 } 813 814 // copy handle_and_flags if not first fragment and update packet boundary flags to be 01 (continuing fragmnent) 815 if (acl_header_pos > 0u){ 816 uint16_t handle_and_flags = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 817 handle_and_flags = (handle_and_flags & 0xcfffu) | (1u << 12u); 818 little_endian_store_16(hci_stack->hci_packet_buffer, acl_header_pos, handle_and_flags); 819 } 820 821 // update header len 822 little_endian_store_16(hci_stack->hci_packet_buffer, acl_header_pos + 2u, current_acl_data_packet_length); 823 824 // count packet 825 connection->num_packets_sent++; 826 log_debug("hci_send_acl_packet_fragments loop before send (more fragments %d)", (int) more_fragments); 827 828 // update state for next fragment (if any) as "transport done" might be sent during send_packet already 829 if (more_fragments){ 830 // update start of next fragment to send 831 hci_stack->acl_fragmentation_pos += current_acl_data_packet_length; 832 } else { 833 // done 834 hci_stack->acl_fragmentation_pos = 0; 835 hci_stack->acl_fragmentation_total_size = 0; 836 } 837 838 // send packet 839 uint8_t * packet = &hci_stack->hci_packet_buffer[acl_header_pos]; 840 const int size = current_acl_data_packet_length + 4; 841 hci_dump_packet(HCI_ACL_DATA_PACKET, 0, packet, size); 842 hci_stack->acl_fragmentation_tx_active = 1; 843 int err = hci_stack->hci_transport->send_packet(HCI_ACL_DATA_PACKET, packet, size); 844 if (err != 0){ 845 // no error from HCI Transport expected 846 status = ERROR_CODE_HARDWARE_FAILURE; 847 } 848 849 log_debug("hci_send_acl_packet_fragments loop after send (more fragments %d)", (int) more_fragments); 850 851 // done yet? 852 if (!more_fragments) break; 853 854 // can send more? 855 if (!hci_can_send_prepared_acl_packet_now(connection->con_handle)) return status; 856 } 857 858 log_debug("hci_send_acl_packet_fragments loop over"); 859 860 // release buffer now for synchronous transport 861 if (hci_transport_synchronous()){ 862 hci_stack->acl_fragmentation_tx_active = 0; 863 hci_release_packet_buffer(); 864 hci_emit_transport_packet_sent(); 865 } 866 867 return status; 868 } 869 870 // pre: caller has reserved the packet buffer 871 uint8_t hci_send_acl_packet_buffer(int size){ 872 btstack_assert(hci_stack->hci_packet_buffer_reserved); 873 874 uint8_t * packet = hci_stack->hci_packet_buffer; 875 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(packet); 876 877 // check for free places on Bluetooth module 878 if (!hci_can_send_prepared_acl_packet_now(con_handle)) { 879 log_error("hci_send_acl_packet_buffer called but no free ACL buffers on controller"); 880 hci_release_packet_buffer(); 881 hci_emit_transport_packet_sent(); 882 return BTSTACK_ACL_BUFFERS_FULL; 883 } 884 885 hci_connection_t *connection = hci_connection_for_handle( con_handle); 886 if (!connection) { 887 log_error("hci_send_acl_packet_buffer called but no connection for handle 0x%04x", con_handle); 888 hci_release_packet_buffer(); 889 hci_emit_transport_packet_sent(); 890 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 891 } 892 893 #ifdef ENABLE_CLASSIC 894 hci_connection_timestamp(connection); 895 #endif 896 897 // hci_dump_packet( HCI_ACL_DATA_PACKET, 0, packet, size); 898 899 // setup data 900 hci_stack->acl_fragmentation_total_size = size; 901 hci_stack->acl_fragmentation_pos = 4; // start of L2CAP packet 902 903 return hci_send_acl_packet_fragments(connection); 904 } 905 906 #ifdef ENABLE_CLASSIC 907 // pre: caller has reserved the packet buffer 908 uint8_t hci_send_sco_packet_buffer(int size){ 909 btstack_assert(hci_stack->hci_packet_buffer_reserved); 910 911 uint8_t * packet = hci_stack->hci_packet_buffer; 912 913 // skip checks in loopback mode 914 if (!hci_stack->loopback_mode){ 915 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(packet); // same for ACL and SCO 916 917 // check for free places on Bluetooth module 918 if (!hci_can_send_prepared_sco_packet_now()) { 919 log_error("hci_send_sco_packet_buffer called but no free SCO buffers on controller"); 920 hci_release_packet_buffer(); 921 hci_emit_transport_packet_sent(); 922 return BTSTACK_ACL_BUFFERS_FULL; 923 } 924 925 // track send packet in connection struct 926 hci_connection_t *connection = hci_connection_for_handle( con_handle); 927 if (!connection) { 928 log_error("hci_send_sco_packet_buffer called but no connection for handle 0x%04x", con_handle); 929 hci_release_packet_buffer(); 930 hci_emit_transport_packet_sent(); 931 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 932 } 933 934 if (hci_have_usb_transport()){ 935 // token used 936 hci_stack->sco_can_send_now = false; 937 } else { 938 if (hci_stack->synchronous_flow_control_enabled){ 939 connection->num_packets_sent++; 940 } else { 941 connection->sco_tx_ready--; 942 } 943 } 944 } 945 946 hci_dump_packet( HCI_SCO_DATA_PACKET, 0, packet, size); 947 948 #ifdef HAVE_SCO_TRANSPORT 949 hci_stack->sco_transport->send_packet(packet, size); 950 hci_release_packet_buffer(); 951 hci_emit_transport_packet_sent(); 952 953 return 0; 954 #else 955 int err = hci_stack->hci_transport->send_packet(HCI_SCO_DATA_PACKET, packet, size); 956 if (hci_transport_synchronous()){ 957 hci_release_packet_buffer(); 958 hci_emit_transport_packet_sent(); 959 } 960 961 if (err != 0){ 962 return ERROR_CODE_HARDWARE_FAILURE; 963 } 964 return ERROR_CODE_SUCCESS; 965 #endif 966 } 967 #endif 968 969 static void acl_handler(uint8_t *packet, uint16_t size){ 970 971 // get info 972 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(packet); 973 hci_connection_t *conn = hci_connection_for_handle(con_handle); 974 uint8_t acl_flags = READ_ACL_FLAGS(packet); 975 uint16_t acl_length = READ_ACL_LENGTH(packet); 976 977 // ignore non-registered handle 978 if (!conn){ 979 log_error("acl_handler called with non-registered handle %u!" , con_handle); 980 return; 981 } 982 983 // assert packet is complete 984 if ((acl_length + 4u) != size){ 985 log_error("acl_handler called with ACL packet of wrong size %d, expected %u => dropping packet", size, acl_length + 4); 986 return; 987 } 988 989 #ifdef ENABLE_CLASSIC 990 // update idle timestamp 991 hci_connection_timestamp(conn); 992 #endif 993 994 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 995 hci_stack->host_completed_packets = 1; 996 conn->num_packets_completed++; 997 #endif 998 999 // handle different packet types 1000 switch (acl_flags & 0x03u) { 1001 1002 case 0x01: // continuation fragment 1003 1004 // sanity checks 1005 if (conn->acl_recombination_pos == 0u) { 1006 log_error( "ACL Cont Fragment but no first fragment for handle 0x%02x", con_handle); 1007 return; 1008 } 1009 if ((conn->acl_recombination_pos + acl_length) > (4u + HCI_ACL_BUFFER_SIZE)){ 1010 log_error( "ACL Cont Fragment to large: combined packet %u > buffer size %u for handle 0x%02x", 1011 conn->acl_recombination_pos + acl_length, 4 + HCI_ACL_BUFFER_SIZE, con_handle); 1012 conn->acl_recombination_pos = 0; 1013 return; 1014 } 1015 1016 // append fragment payload (header already stored) 1017 (void)memcpy(&conn->acl_recombination_buffer[HCI_INCOMING_PRE_BUFFER_SIZE + conn->acl_recombination_pos], 1018 &packet[4], acl_length); 1019 conn->acl_recombination_pos += acl_length; 1020 1021 // forward complete L2CAP packet if complete. 1022 if (conn->acl_recombination_pos >= (conn->acl_recombination_length + 4u + 4u)){ // pos already incl. ACL header 1023 hci_emit_acl_packet(&conn->acl_recombination_buffer[HCI_INCOMING_PRE_BUFFER_SIZE], conn->acl_recombination_pos); 1024 // reset recombination buffer 1025 conn->acl_recombination_length = 0; 1026 conn->acl_recombination_pos = 0; 1027 } 1028 break; 1029 1030 case 0x02: { // first fragment 1031 1032 // sanity check 1033 if (conn->acl_recombination_pos) { 1034 log_error( "ACL First Fragment but data in buffer for handle 0x%02x, dropping stale fragments", con_handle); 1035 conn->acl_recombination_pos = 0; 1036 } 1037 1038 // peek into L2CAP packet! 1039 uint16_t l2cap_length = READ_L2CAP_LENGTH( packet ); 1040 1041 // compare fragment size to L2CAP packet size 1042 if (acl_length >= (l2cap_length + 4u)){ 1043 // forward fragment as L2CAP packet 1044 hci_emit_acl_packet(packet, acl_length + 4u); 1045 } else { 1046 1047 if (acl_length > HCI_ACL_BUFFER_SIZE){ 1048 log_error( "ACL First Fragment to large: fragment %u > buffer size %u for handle 0x%02x", 1049 4 + acl_length, 4 + HCI_ACL_BUFFER_SIZE, con_handle); 1050 return; 1051 } 1052 1053 // store first fragment and tweak acl length for complete package 1054 (void)memcpy(&conn->acl_recombination_buffer[HCI_INCOMING_PRE_BUFFER_SIZE], 1055 packet, acl_length + 4u); 1056 conn->acl_recombination_pos = acl_length + 4u; 1057 conn->acl_recombination_length = l2cap_length; 1058 little_endian_store_16(conn->acl_recombination_buffer, HCI_INCOMING_PRE_BUFFER_SIZE + 2u, l2cap_length +4u); 1059 } 1060 break; 1061 1062 } 1063 default: 1064 log_error( "acl_handler called with invalid packet boundary flags %u", acl_flags & 0x03); 1065 return; 1066 } 1067 1068 // execute main loop 1069 hci_run(); 1070 } 1071 1072 static void hci_connection_stop_timer(hci_connection_t * conn){ 1073 btstack_run_loop_remove_timer(&conn->timeout); 1074 #ifdef ENABLE_CLASSIC 1075 btstack_run_loop_remove_timer(&conn->timeout_sco); 1076 #endif 1077 } 1078 1079 static void hci_shutdown_connection(hci_connection_t *conn){ 1080 log_info("Connection closed: handle 0x%x, %s", conn->con_handle, bd_addr_to_str(conn->address)); 1081 1082 #ifdef ENABLE_CLASSIC 1083 #if defined(ENABLE_SCO_OVER_HCI) || defined(HAVE_SCO_TRANSPORT) 1084 bd_addr_type_t addr_type = conn->address_type; 1085 #endif 1086 #ifdef HAVE_SCO_TRANSPORT 1087 hci_con_handle_t con_handle = conn->con_handle; 1088 #endif 1089 #endif 1090 1091 hci_connection_stop_timer(conn); 1092 1093 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 1094 btstack_memory_hci_connection_free( conn ); 1095 1096 // now it's gone 1097 hci_emit_nr_connections_changed(); 1098 1099 #ifdef ENABLE_CLASSIC 1100 #ifdef ENABLE_SCO_OVER_HCI 1101 // update SCO 1102 if ((addr_type == BD_ADDR_TYPE_SCO) && (hci_stack->hci_transport != NULL) && (hci_stack->hci_transport->set_sco_config != NULL)){ 1103 hci_stack->hci_transport->set_sco_config(hci_stack->sco_voice_setting_active, hci_number_sco_connections()); 1104 } 1105 #endif 1106 #ifdef HAVE_SCO_TRANSPORT 1107 if ((addr_type == BD_ADDR_TYPE_SCO) && (hci_stack->sco_transport != NULL)){ 1108 hci_stack->sco_transport->close(con_handle); 1109 } 1110 #endif 1111 #endif 1112 } 1113 1114 #ifdef ENABLE_CLASSIC 1115 1116 static const uint16_t packet_type_sizes[] = { 1117 0, HCI_ACL_2DH1_SIZE, HCI_ACL_3DH1_SIZE, HCI_ACL_DM1_SIZE, 1118 HCI_ACL_DH1_SIZE, 0, 0, 0, 1119 HCI_ACL_2DH3_SIZE, HCI_ACL_3DH3_SIZE, HCI_ACL_DM3_SIZE, HCI_ACL_DH3_SIZE, 1120 HCI_ACL_2DH5_SIZE, HCI_ACL_3DH5_SIZE, HCI_ACL_DM5_SIZE, HCI_ACL_DH5_SIZE 1121 }; 1122 static const uint8_t packet_type_feature_requirement_bit[] = { 1123 0, // 3 slot packets 1124 1, // 5 slot packets 1125 25, // EDR 2 mpbs 1126 26, // EDR 3 mbps 1127 39, // 3 slot EDR packts 1128 40, // 5 slot EDR packet 1129 }; 1130 static const uint16_t packet_type_feature_packet_mask[] = { 1131 0x0f00, // 3 slot packets 1132 0xf000, // 5 slot packets 1133 0x1102, // EDR 2 mpbs 1134 0x2204, // EDR 3 mbps 1135 0x0300, // 3 slot EDR packts 1136 0x3000, // 5 slot EDR packet 1137 }; 1138 1139 static uint16_t hci_acl_packet_types_for_buffer_size_and_local_features(uint16_t buffer_size, uint8_t * local_supported_features){ 1140 // enable packet types based on size 1141 uint16_t packet_types = 0; 1142 unsigned int i; 1143 for (i=0;i<16;i++){ 1144 if (packet_type_sizes[i] == 0) continue; 1145 if (packet_type_sizes[i] <= buffer_size){ 1146 packet_types |= 1 << i; 1147 } 1148 } 1149 // disable packet types due to missing local supported features 1150 for (i=0;i<sizeof(packet_type_feature_requirement_bit);i++){ 1151 unsigned int bit_idx = packet_type_feature_requirement_bit[i]; 1152 int feature_set = (local_supported_features[bit_idx >> 3] & (1<<(bit_idx & 7))) != 0; 1153 if (feature_set) continue; 1154 log_info("Features bit %02u is not set, removing packet types 0x%04x", bit_idx, packet_type_feature_packet_mask[i]); 1155 packet_types &= ~packet_type_feature_packet_mask[i]; 1156 } 1157 // flip bits for "may not be used" 1158 packet_types ^= 0x3306; 1159 return packet_types; 1160 } 1161 1162 uint16_t hci_usable_acl_packet_types(void){ 1163 return hci_stack->packet_types; 1164 } 1165 #endif 1166 1167 uint8_t* hci_get_outgoing_packet_buffer(void){ 1168 // hci packet buffer is >= acl data packet length 1169 return hci_stack->hci_packet_buffer; 1170 } 1171 1172 uint16_t hci_max_acl_data_packet_length(void){ 1173 return hci_stack->acl_data_packet_length; 1174 } 1175 1176 #ifdef ENABLE_CLASSIC 1177 bool hci_extended_sco_link_supported(void){ 1178 // No. 31, byte 3, bit 7 1179 return (hci_stack->local_supported_features[3] & (1 << 7)) != 0; 1180 } 1181 #endif 1182 1183 bool hci_non_flushable_packet_boundary_flag_supported(void){ 1184 // No. 54, byte 6, bit 6 1185 return (hci_stack->local_supported_features[6u] & (1u << 6u)) != 0u; 1186 } 1187 1188 #ifdef ENABLE_CLASSIC 1189 static int gap_ssp_supported(void){ 1190 // No. 51, byte 6, bit 3 1191 return (hci_stack->local_supported_features[6u] & (1u << 3u)) != 0u; 1192 } 1193 #endif 1194 1195 static int hci_classic_supported(void){ 1196 #ifdef ENABLE_CLASSIC 1197 // No. 37, byte 4, bit 5, = No BR/EDR Support 1198 return (hci_stack->local_supported_features[4] & (1 << 5)) == 0; 1199 #else 1200 return 0; 1201 #endif 1202 } 1203 1204 static int hci_le_supported(void){ 1205 #ifdef ENABLE_BLE 1206 // No. 37, byte 4, bit 6 = LE Supported (Controller) 1207 return (hci_stack->local_supported_features[4u] & (1u << 6u)) != 0u; 1208 #else 1209 return 0; 1210 #endif 1211 } 1212 1213 static bool hci_command_supported(uint8_t command_index){ 1214 return (hci_stack->local_supported_commands & (1LU << command_index)) != 0; 1215 } 1216 1217 #ifdef ENABLE_BLE 1218 1219 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 1220 static bool hci_extended_advertising_supported(void){ 1221 return hci_command_supported(SUPPORTED_HCI_COMMAND_LE_SET_EXTENDED_ADVERTISING_ENABLE); 1222 } 1223 #endif 1224 1225 static void hci_get_own_address_for_addr_type(uint8_t own_addr_type, bd_addr_t own_addr){ 1226 if (own_addr_type == BD_ADDR_TYPE_LE_PUBLIC){ 1227 (void)memcpy(own_addr, hci_stack->local_bd_addr, 6); 1228 } else { 1229 (void)memcpy(own_addr, hci_stack->le_random_address, 6); 1230 } 1231 } 1232 1233 void gap_le_get_own_address(uint8_t * addr_type, bd_addr_t addr){ 1234 *addr_type = hci_stack->le_own_addr_type; 1235 hci_get_own_address_for_addr_type(hci_stack->le_own_addr_type, addr); 1236 } 1237 1238 #ifdef ENABLE_LE_PERIPHERAL 1239 void gap_le_get_own_advertisements_address(uint8_t * addr_type, bd_addr_t addr){ 1240 *addr_type = hci_stack->le_advertisements_own_addr_type; 1241 hci_get_own_address_for_addr_type(hci_stack->le_advertisements_own_addr_type, addr); 1242 }; 1243 #endif 1244 1245 #ifdef ENABLE_LE_CENTRAL 1246 1247 /** 1248 * @brief Get own addr type and address used for LE connections (Central) 1249 */ 1250 void gap_le_get_own_connection_address(uint8_t * addr_type, bd_addr_t addr){ 1251 *addr_type = hci_stack->le_connection_own_addr_type; 1252 hci_get_own_address_for_addr_type(hci_stack->le_connection_own_addr_type, addr); 1253 } 1254 1255 void le_handle_advertisement_report(uint8_t *packet, uint16_t size){ 1256 1257 uint16_t offset = 3; 1258 uint8_t num_reports = packet[offset]; 1259 offset += 1; 1260 1261 uint16_t i; 1262 uint8_t event[12 + LE_ADVERTISING_DATA_SIZE]; // use upper bound to avoid var size automatic var 1263 for (i=0; (i<num_reports) && (offset < size);i++){ 1264 // sanity checks on data_length: 1265 uint8_t data_length = packet[offset + 8]; 1266 if (data_length > LE_ADVERTISING_DATA_SIZE) return; 1267 if ((offset + 9u + data_length + 1u) > size) return; 1268 // setup event 1269 uint8_t event_size = 10u + data_length; 1270 uint16_t pos = 0; 1271 event[pos++] = GAP_EVENT_ADVERTISING_REPORT; 1272 event[pos++] = event_size; 1273 (void)memcpy(&event[pos], &packet[offset], 1 + 1 + 6); // event type + address type + address 1274 offset += 8; 1275 pos += 8; 1276 event[pos++] = packet[offset + 1 + data_length]; // rssi 1277 event[pos++] = data_length; 1278 offset++; 1279 (void)memcpy(&event[pos], &packet[offset], data_length); 1280 pos += data_length; 1281 offset += data_length + 1u; // rssi 1282 hci_emit_event(event, pos, 1); 1283 } 1284 } 1285 1286 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 1287 void le_handle_extended_advertisement_report(uint8_t *packet, uint16_t size) { 1288 uint16_t offset = 3; 1289 uint8_t num_reports = packet[offset++]; 1290 uint8_t event[2 + 255]; // use upper bound to avoid var size automatic var 1291 uint8_t i; 1292 for (i=0; (i<num_reports) && (offset < size);i++){ 1293 // sanity checks on data_length: 1294 uint16_t data_length = packet[offset + 23]; 1295 if (data_length > LE_ADVERTISING_DATA_SIZE) return; 1296 if ((offset + 24u + data_length) > size) return; 1297 uint16_t event_type = little_endian_read_16(packet, offset); 1298 offset += 2; 1299 if ((event_type & 0x10) != 0) { 1300 // setup legacy event 1301 uint8_t legacy_event_type; 1302 switch (event_type){ 1303 case 0b0010011: 1304 // ADV_IND 1305 legacy_event_type = 0; 1306 break; 1307 case 0b0010101: 1308 // ADV_DIRECT_IND 1309 legacy_event_type = 1; 1310 break; 1311 case 0b0010010: 1312 // ADV_SCAN_IND 1313 legacy_event_type = 2; 1314 break; 1315 case 0b0010000: 1316 // ADV_NONCONN_IND 1317 legacy_event_type = 3; 1318 break; 1319 case 0b0011011: 1320 case 0b0011010: 1321 // SCAN_RSP 1322 legacy_event_type = 4; 1323 break; 1324 default: 1325 legacy_event_type = 0; 1326 break; 1327 } 1328 uint16_t pos = 0; 1329 event[pos++] = GAP_EVENT_ADVERTISING_REPORT; 1330 event[pos++] = 10u + data_length; 1331 event[pos++] = legacy_event_type; 1332 // copy address type + address 1333 (void) memcpy(&event[pos], &packet[offset], 1 + 6); 1334 offset += 7; 1335 pos += 7; 1336 // skip primary_phy, secondary_phy, advertising_sid, tx_power 1337 offset += 4; 1338 // copy rssi 1339 event[pos++] = packet[offset++]; 1340 // skip periodic advertising interval and direct address 1341 offset += 9; 1342 // copy data len + data; 1343 (void) memcpy(&event[pos], &packet[offset], 1 + data_length); 1344 pos += 1 +data_length; 1345 offset += 1+ data_length; 1346 hci_emit_event(event, pos, 1); 1347 } else { 1348 event[0] = GAP_EVENT_EXTENDED_ADVERTISING_REPORT; 1349 uint8_t report_len = 24 + data_length; 1350 event[1] = report_len; 1351 little_endian_store_16(event, 2, event_type); 1352 memcpy(&event[4], &packet[offset], report_len); 1353 offset += report_len; 1354 hci_emit_event(event, 2 + report_len, 1); 1355 } 1356 } 1357 } 1358 #endif 1359 1360 #endif 1361 #endif 1362 1363 #ifdef ENABLE_BLE 1364 #ifdef ENABLE_LE_PERIPHERAL 1365 static void hci_update_advertisements_enabled_for_current_roles(void){ 1366 if ((hci_stack->le_advertisements_state & LE_ADVERTISEMENT_STATE_ENABLED) != 0){ 1367 // get number of active le slave connections 1368 int num_slave_connections = 0; 1369 btstack_linked_list_iterator_t it; 1370 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 1371 while (btstack_linked_list_iterator_has_next(&it)){ 1372 hci_connection_t * con = (hci_connection_t*) btstack_linked_list_iterator_next(&it); 1373 log_info("state %u, role %u, le_con %u", con->state, con->role, hci_is_le_connection(con)); 1374 if (con->state != OPEN) continue; 1375 if (con->role != HCI_ROLE_SLAVE) continue; 1376 if (!hci_is_le_connection(con)) continue; 1377 num_slave_connections++; 1378 } 1379 log_info("Num LE Peripheral roles: %u of %u", num_slave_connections, hci_stack->le_max_number_peripheral_connections); 1380 hci_stack->le_advertisements_enabled_for_current_roles = num_slave_connections < hci_stack->le_max_number_peripheral_connections; 1381 } else { 1382 hci_stack->le_advertisements_enabled_for_current_roles = false; 1383 } 1384 } 1385 #endif 1386 #endif 1387 1388 #ifdef ENABLE_CLASSIC 1389 static void gap_run_set_local_name(void){ 1390 hci_reserve_packet_buffer(); 1391 uint8_t * packet = hci_stack->hci_packet_buffer; 1392 // construct HCI Command and send 1393 uint16_t opcode = hci_write_local_name.opcode; 1394 hci_stack->last_cmd_opcode = opcode; 1395 packet[0] = opcode & 0xff; 1396 packet[1] = opcode >> 8; 1397 packet[2] = DEVICE_NAME_LEN; 1398 memset(&packet[3], 0, DEVICE_NAME_LEN); 1399 uint16_t name_len = (uint16_t) strlen(hci_stack->local_name); 1400 uint16_t bytes_to_copy = btstack_min(name_len, DEVICE_NAME_LEN); 1401 // if shorter than DEVICE_NAME_LEN, it's implicitly NULL-terminated by memset call 1402 (void)memcpy(&packet[3], hci_stack->local_name, bytes_to_copy); 1403 // expand '00:00:00:00:00:00' in name with bd_addr 1404 btstack_replace_bd_addr_placeholder(&packet[3], bytes_to_copy, hci_stack->local_bd_addr); 1405 hci_send_cmd_packet(packet, HCI_CMD_HEADER_SIZE + DEVICE_NAME_LEN); 1406 } 1407 1408 static void gap_run_set_eir_data(void){ 1409 hci_reserve_packet_buffer(); 1410 uint8_t * packet = hci_stack->hci_packet_buffer; 1411 // construct HCI Command in-place and send 1412 uint16_t opcode = hci_write_extended_inquiry_response.opcode; 1413 hci_stack->last_cmd_opcode = opcode; 1414 uint16_t offset = 0; 1415 packet[offset++] = opcode & 0xff; 1416 packet[offset++] = opcode >> 8; 1417 packet[offset++] = 1 + EXTENDED_INQUIRY_RESPONSE_DATA_LEN; 1418 packet[offset++] = 0; // FEC not required 1419 memset(&packet[offset], 0, EXTENDED_INQUIRY_RESPONSE_DATA_LEN); 1420 if (hci_stack->eir_data){ 1421 // copy items and expand '00:00:00:00:00:00' in name with bd_addr 1422 ad_context_t context; 1423 for (ad_iterator_init(&context, EXTENDED_INQUIRY_RESPONSE_DATA_LEN, hci_stack->eir_data) ; ad_iterator_has_more(&context) ; ad_iterator_next(&context)) { 1424 uint8_t data_type = ad_iterator_get_data_type(&context); 1425 uint8_t size = ad_iterator_get_data_len(&context); 1426 const uint8_t *data = ad_iterator_get_data(&context); 1427 // copy item 1428 packet[offset++] = size + 1; 1429 packet[offset++] = data_type; 1430 memcpy(&packet[offset], data, size); 1431 // update name item 1432 if ((data_type == BLUETOOTH_DATA_TYPE_SHORTENED_LOCAL_NAME) || (data_type == BLUETOOTH_DATA_TYPE_COMPLETE_LOCAL_NAME)){ 1433 btstack_replace_bd_addr_placeholder(&packet[offset], size, hci_stack->local_bd_addr); 1434 } 1435 offset += size; 1436 } 1437 } else { 1438 uint16_t name_len = (uint16_t) strlen(hci_stack->local_name); 1439 uint16_t bytes_to_copy = btstack_min(name_len, EXTENDED_INQUIRY_RESPONSE_DATA_LEN - 2); 1440 packet[offset++] = bytes_to_copy + 1; 1441 packet[offset++] = BLUETOOTH_DATA_TYPE_COMPLETE_LOCAL_NAME; 1442 (void)memcpy(&packet[6], hci_stack->local_name, bytes_to_copy); 1443 // expand '00:00:00:00:00:00' in name with bd_addr 1444 btstack_replace_bd_addr_placeholder(&packet[offset], bytes_to_copy, hci_stack->local_bd_addr); 1445 } 1446 hci_send_cmd_packet(packet, HCI_CMD_HEADER_SIZE + 1 + EXTENDED_INQUIRY_RESPONSE_DATA_LEN); 1447 } 1448 1449 static void hci_run_gap_tasks_classic(void){ 1450 if ((hci_stack->gap_tasks_classic & GAP_TASK_SET_CLASS_OF_DEVICE) != 0) { 1451 hci_stack->gap_tasks_classic &= ~GAP_TASK_SET_CLASS_OF_DEVICE; 1452 hci_send_cmd(&hci_write_class_of_device, hci_stack->class_of_device); 1453 return; 1454 } 1455 if ((hci_stack->gap_tasks_classic & GAP_TASK_SET_LOCAL_NAME) != 0) { 1456 hci_stack->gap_tasks_classic &= ~GAP_TASK_SET_LOCAL_NAME; 1457 gap_run_set_local_name(); 1458 return; 1459 } 1460 if ((hci_stack->gap_tasks_classic & GAP_TASK_SET_EIR_DATA) != 0) { 1461 hci_stack->gap_tasks_classic &= ~GAP_TASK_SET_EIR_DATA; 1462 gap_run_set_eir_data(); 1463 return; 1464 } 1465 if ((hci_stack->gap_tasks_classic & GAP_TASK_SET_DEFAULT_LINK_POLICY) != 0) { 1466 hci_stack->gap_tasks_classic &= ~GAP_TASK_SET_DEFAULT_LINK_POLICY; 1467 hci_send_cmd(&hci_write_default_link_policy_setting, hci_stack->default_link_policy_settings); 1468 return; 1469 } 1470 // write page scan activity 1471 if ((hci_stack->gap_tasks_classic & GAP_TASK_WRITE_PAGE_SCAN_ACTIVITY) != 0) { 1472 hci_stack->gap_tasks_classic &= ~GAP_TASK_WRITE_PAGE_SCAN_ACTIVITY; 1473 hci_send_cmd(&hci_write_page_scan_activity, hci_stack->new_page_scan_interval, hci_stack->new_page_scan_window); 1474 return; 1475 } 1476 // write page scan type 1477 if ((hci_stack->gap_tasks_classic & GAP_TASK_WRITE_PAGE_SCAN_TYPE) != 0) { 1478 hci_stack->gap_tasks_classic &= ~GAP_TASK_WRITE_PAGE_SCAN_TYPE; 1479 hci_send_cmd(&hci_write_page_scan_type, hci_stack->new_page_scan_type); 1480 return; 1481 } 1482 // write page timeout 1483 if ((hci_stack->gap_tasks_classic & GAP_TASK_WRITE_PAGE_TIMEOUT) != 0) { 1484 hci_stack->gap_tasks_classic &= ~GAP_TASK_WRITE_PAGE_TIMEOUT; 1485 hci_send_cmd(&hci_write_page_timeout, hci_stack->page_timeout); 1486 return; 1487 } 1488 // send scan enable 1489 if ((hci_stack->gap_tasks_classic & GAP_TASK_WRITE_SCAN_ENABLE) != 0) { 1490 hci_stack->gap_tasks_classic &= ~GAP_TASK_WRITE_SCAN_ENABLE; 1491 hci_send_cmd(&hci_write_scan_enable, hci_stack->new_scan_enable_value); 1492 return; 1493 } 1494 // send write scan activity 1495 if ((hci_stack->gap_tasks_classic & GAP_TASK_WRITE_INQUIRY_SCAN_ACTIVITY) != 0) { 1496 hci_stack->gap_tasks_classic &= ~GAP_TASK_WRITE_INQUIRY_SCAN_ACTIVITY; 1497 hci_send_cmd(&hci_write_inquiry_scan_activity, hci_stack->inquiry_scan_interval, hci_stack->inquiry_scan_window); 1498 return; 1499 } 1500 } 1501 #endif 1502 1503 #ifndef HAVE_HOST_CONTROLLER_API 1504 1505 static uint32_t hci_transport_uart_get_main_baud_rate(void){ 1506 if (!hci_stack->config) return 0; 1507 uint32_t baud_rate = ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_main; 1508 // Limit baud rate for Broadcom chipsets to 3 mbps 1509 if ((hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION) && (baud_rate > 3000000)){ 1510 baud_rate = 3000000; 1511 } 1512 return baud_rate; 1513 } 1514 1515 static void hci_initialization_timeout_handler(btstack_timer_source_t * ds){ 1516 UNUSED(ds); 1517 1518 switch (hci_stack->substate){ 1519 case HCI_INIT_W4_SEND_RESET: 1520 log_info("Resend HCI Reset"); 1521 hci_stack->substate = HCI_INIT_SEND_RESET; 1522 hci_stack->num_cmd_packets = 1; 1523 hci_run(); 1524 break; 1525 case HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT_LINK_RESET: 1526 log_info("Resend HCI Reset - CSR Warm Boot with Link Reset"); 1527 if (hci_stack->hci_transport->reset_link){ 1528 hci_stack->hci_transport->reset_link(); 1529 } 1530 1531 /* fall through */ 1532 1533 case HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT: 1534 log_info("Resend HCI Reset - CSR Warm Boot"); 1535 hci_stack->substate = HCI_INIT_SEND_RESET_CSR_WARM_BOOT; 1536 hci_stack->num_cmd_packets = 1; 1537 hci_run(); 1538 break; 1539 case HCI_INIT_W4_SEND_BAUD_CHANGE: 1540 if (hci_stack->hci_transport->set_baudrate){ 1541 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1542 log_info("Local baud rate change to %" PRIu32 "(timeout handler)", baud_rate); 1543 hci_stack->hci_transport->set_baudrate(baud_rate); 1544 } 1545 // For CSR, HCI Reset is sent on new baud rate. Don't forget to reset link for H5/BCSP 1546 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_CAMBRIDGE_SILICON_RADIO){ 1547 if (hci_stack->hci_transport->reset_link){ 1548 log_info("Link Reset"); 1549 hci_stack->hci_transport->reset_link(); 1550 } 1551 hci_stack->substate = HCI_INIT_SEND_RESET_CSR_WARM_BOOT; 1552 hci_run(); 1553 } 1554 break; 1555 case HCI_INIT_W4_CUSTOM_INIT_BCM_DELAY: 1556 // otherwise continue 1557 hci_stack->substate = HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS; 1558 hci_send_cmd(&hci_read_local_supported_commands); 1559 break; 1560 default: 1561 break; 1562 } 1563 } 1564 #endif 1565 1566 static void hci_initializing_next_state(void){ 1567 hci_stack->substate = (hci_substate_t )( ((int) hci_stack->substate) + 1); 1568 } 1569 1570 static void hci_init_done(void){ 1571 // done. tell the app 1572 log_info("hci_init_done -> HCI_STATE_WORKING"); 1573 hci_stack->state = HCI_STATE_WORKING; 1574 hci_emit_state(); 1575 } 1576 1577 // assumption: hci_can_send_command_packet_now() == true 1578 static void hci_initializing_run(void){ 1579 log_debug("hci_initializing_run: substate %u, can send %u", hci_stack->substate, hci_can_send_command_packet_now()); 1580 1581 if (!hci_can_send_command_packet_now()) return; 1582 1583 #ifndef HAVE_HOST_CONTROLLER_API 1584 bool need_baud_change = hci_stack->config 1585 && hci_stack->chipset 1586 && hci_stack->chipset->set_baudrate_command 1587 && hci_stack->hci_transport->set_baudrate 1588 && ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_main; 1589 #endif 1590 1591 switch (hci_stack->substate){ 1592 case HCI_INIT_SEND_RESET: 1593 hci_state_reset(); 1594 1595 #ifndef HAVE_HOST_CONTROLLER_API 1596 // prepare reset if command complete not received in 100ms 1597 btstack_run_loop_set_timer(&hci_stack->timeout, HCI_RESET_RESEND_TIMEOUT_MS); 1598 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_initialization_timeout_handler); 1599 btstack_run_loop_add_timer(&hci_stack->timeout); 1600 #endif 1601 // send command 1602 hci_stack->substate = HCI_INIT_W4_SEND_RESET; 1603 hci_send_cmd(&hci_reset); 1604 break; 1605 case HCI_INIT_SEND_READ_LOCAL_VERSION_INFORMATION: 1606 hci_send_cmd(&hci_read_local_version_information); 1607 hci_stack->substate = HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION; 1608 break; 1609 1610 #ifndef HAVE_HOST_CONTROLLER_API 1611 case HCI_INIT_SEND_RESET_CSR_WARM_BOOT: 1612 hci_state_reset(); 1613 // prepare reset if command complete not received in 100ms 1614 btstack_run_loop_set_timer(&hci_stack->timeout, HCI_RESET_RESEND_TIMEOUT_MS); 1615 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_initialization_timeout_handler); 1616 btstack_run_loop_add_timer(&hci_stack->timeout); 1617 // send command 1618 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT; 1619 hci_send_cmd(&hci_reset); 1620 break; 1621 case HCI_INIT_SEND_RESET_ST_WARM_BOOT: 1622 hci_state_reset(); 1623 hci_stack->substate = HCI_INIT_W4_SEND_RESET_ST_WARM_BOOT; 1624 hci_send_cmd(&hci_reset); 1625 break; 1626 case HCI_INIT_SEND_BAUD_CHANGE_BCM: { 1627 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1628 hci_stack->chipset->set_baudrate_command(baud_rate, hci_stack->hci_packet_buffer); 1629 hci_stack->last_cmd_opcode = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 1630 hci_stack->substate = HCI_INIT_W4_SEND_BAUD_CHANGE_BCM; 1631 hci_send_cmd_packet(hci_stack->hci_packet_buffer, 3u + hci_stack->hci_packet_buffer[2u]); 1632 break; 1633 } 1634 case HCI_INIT_SET_BD_ADDR: 1635 log_info("Set Public BD ADDR to %s", bd_addr_to_str(hci_stack->custom_bd_addr)); 1636 hci_stack->chipset->set_bd_addr_command(hci_stack->custom_bd_addr, hci_stack->hci_packet_buffer); 1637 hci_stack->last_cmd_opcode = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 1638 hci_stack->substate = HCI_INIT_W4_SET_BD_ADDR; 1639 hci_send_cmd_packet(hci_stack->hci_packet_buffer, 3u + hci_stack->hci_packet_buffer[2u]); 1640 break; 1641 case HCI_INIT_SEND_READ_LOCAL_NAME: 1642 #ifdef ENABLE_CLASSIC 1643 hci_send_cmd(&hci_read_local_name); 1644 hci_stack->substate = HCI_INIT_W4_SEND_READ_LOCAL_NAME; 1645 break; 1646 #endif 1647 /* fall through */ 1648 1649 case HCI_INIT_SEND_BAUD_CHANGE: 1650 if (need_baud_change) { 1651 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1652 hci_stack->chipset->set_baudrate_command(baud_rate, hci_stack->hci_packet_buffer); 1653 hci_stack->last_cmd_opcode = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 1654 hci_stack->substate = HCI_INIT_W4_SEND_BAUD_CHANGE; 1655 hci_send_cmd_packet(hci_stack->hci_packet_buffer, 3u + hci_stack->hci_packet_buffer[2u]); 1656 // STLC25000D: baudrate change happens within 0.5 s after command was send, 1657 // use timer to update baud rate after 100 ms (knowing exactly, when command was sent is non-trivial) 1658 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_ST_MICROELECTRONICS){ 1659 btstack_run_loop_set_timer(&hci_stack->timeout, HCI_RESET_RESEND_TIMEOUT_MS); 1660 btstack_run_loop_add_timer(&hci_stack->timeout); 1661 } 1662 break; 1663 } 1664 1665 /* fall through */ 1666 1667 case HCI_INIT_CUSTOM_INIT: 1668 // Custom initialization 1669 if (hci_stack->chipset && hci_stack->chipset->next_command){ 1670 hci_stack->chipset_result = (*hci_stack->chipset->next_command)(hci_stack->hci_packet_buffer); 1671 bool send_cmd = false; 1672 switch (hci_stack->chipset_result){ 1673 case BTSTACK_CHIPSET_VALID_COMMAND: 1674 send_cmd = true; 1675 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT; 1676 break; 1677 case BTSTACK_CHIPSET_WARMSTART_REQUIRED: 1678 send_cmd = true; 1679 // CSR Warm Boot: Wait a bit, then send HCI Reset until HCI Command Complete 1680 log_info("CSR Warm Boot"); 1681 btstack_run_loop_set_timer(&hci_stack->timeout, HCI_RESET_RESEND_TIMEOUT_MS); 1682 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_initialization_timeout_handler); 1683 btstack_run_loop_add_timer(&hci_stack->timeout); 1684 if ((hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_CAMBRIDGE_SILICON_RADIO) 1685 && hci_stack->config 1686 && hci_stack->chipset 1687 // && hci_stack->chipset->set_baudrate_command -- there's no such command 1688 && hci_stack->hci_transport->set_baudrate 1689 && hci_transport_uart_get_main_baud_rate()){ 1690 hci_stack->substate = HCI_INIT_W4_SEND_BAUD_CHANGE; 1691 } else { 1692 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT_LINK_RESET; 1693 } 1694 break; 1695 default: 1696 break; 1697 } 1698 1699 if (send_cmd){ 1700 int size = 3u + hci_stack->hci_packet_buffer[2u]; 1701 hci_stack->last_cmd_opcode = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 1702 hci_dump_packet(HCI_COMMAND_DATA_PACKET, 0, hci_stack->hci_packet_buffer, size); 1703 hci_stack->hci_transport->send_packet(HCI_COMMAND_DATA_PACKET, hci_stack->hci_packet_buffer, size); 1704 break; 1705 } 1706 log_info("Init script done"); 1707 1708 // Init script download on Broadcom chipsets causes: 1709 if ( (hci_stack->chipset_result != BTSTACK_CHIPSET_NO_INIT_SCRIPT) && 1710 ( (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION) 1711 || (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_EM_MICROELECTRONIC_MARIN_SA)) ){ 1712 1713 // - baud rate to reset, restore UART baud rate if needed 1714 if (need_baud_change) { 1715 uint32_t baud_rate = ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_init; 1716 log_info("Local baud rate change to %" PRIu32 " after init script (bcm)", baud_rate); 1717 hci_stack->hci_transport->set_baudrate(baud_rate); 1718 } 1719 1720 uint16_t bcm_delay_ms = 300; 1721 // - UART may or may not be disabled during update and Controller RTS may or may not be high during this time 1722 // -> Work around: wait here. 1723 log_info("BCM delay (%u ms) after init script", bcm_delay_ms); 1724 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT_BCM_DELAY; 1725 btstack_run_loop_set_timer(&hci_stack->timeout, bcm_delay_ms); 1726 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_initialization_timeout_handler); 1727 btstack_run_loop_add_timer(&hci_stack->timeout); 1728 break; 1729 } 1730 } 1731 #endif 1732 /* fall through */ 1733 1734 case HCI_INIT_READ_LOCAL_SUPPORTED_COMMANDS: 1735 hci_stack->substate = HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS; 1736 hci_send_cmd(&hci_read_local_supported_commands); 1737 break; 1738 case HCI_INIT_READ_BD_ADDR: 1739 hci_stack->substate = HCI_INIT_W4_READ_BD_ADDR; 1740 hci_send_cmd(&hci_read_bd_addr); 1741 break; 1742 case HCI_INIT_READ_BUFFER_SIZE: 1743 // only read buffer size if supported 1744 if (hci_command_supported(SUPPORTED_HCI_COMMAND_READ_BUFFER_SIZE)){ 1745 hci_stack->substate = HCI_INIT_W4_READ_BUFFER_SIZE; 1746 hci_send_cmd(&hci_read_buffer_size); 1747 break; 1748 } 1749 1750 /* fall through */ 1751 1752 case HCI_INIT_READ_LOCAL_SUPPORTED_FEATURES: 1753 hci_stack->substate = HCI_INIT_W4_READ_LOCAL_SUPPORTED_FEATURES; 1754 hci_send_cmd(&hci_read_local_supported_features); 1755 break; 1756 1757 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 1758 case HCI_INIT_SET_CONTROLLER_TO_HOST_FLOW_CONTROL: 1759 hci_stack->substate = HCI_INIT_W4_SET_CONTROLLER_TO_HOST_FLOW_CONTROL; 1760 hci_send_cmd(&hci_set_controller_to_host_flow_control, 3); // ACL + SCO Flow Control 1761 break; 1762 case HCI_INIT_HOST_BUFFER_SIZE: 1763 hci_stack->substate = HCI_INIT_W4_HOST_BUFFER_SIZE; 1764 hci_send_cmd(&hci_host_buffer_size, HCI_HOST_ACL_PACKET_LEN, HCI_HOST_SCO_PACKET_LEN, 1765 HCI_HOST_ACL_PACKET_NUM, HCI_HOST_SCO_PACKET_NUM); 1766 break; 1767 #endif 1768 1769 case HCI_INIT_SET_EVENT_MASK: 1770 hci_stack->substate = HCI_INIT_W4_SET_EVENT_MASK; 1771 if (hci_le_supported()){ 1772 hci_send_cmd(&hci_set_event_mask,0xFFFFFFFFU, 0x3FFFFFFFU); 1773 } else { 1774 // Kensington Bluetooth 2.1 USB Dongle (CSR Chipset) returns an error for 0xffff... 1775 hci_send_cmd(&hci_set_event_mask,0xFFFFFFFFU, 0x1FFFFFFFU); 1776 } 1777 break; 1778 1779 #ifdef ENABLE_CLASSIC 1780 case HCI_INIT_WRITE_SIMPLE_PAIRING_MODE: 1781 if (hci_classic_supported() && gap_ssp_supported()){ 1782 hci_stack->substate = HCI_INIT_W4_WRITE_SIMPLE_PAIRING_MODE; 1783 hci_send_cmd(&hci_write_simple_pairing_mode, hci_stack->ssp_enable); 1784 break; 1785 } 1786 1787 /* fall through */ 1788 1789 case HCI_INIT_WRITE_INQUIRY_MODE: 1790 if (hci_classic_supported()){ 1791 hci_stack->substate = HCI_INIT_W4_WRITE_INQUIRY_MODE; 1792 hci_send_cmd(&hci_write_inquiry_mode, (int) hci_stack->inquiry_mode); 1793 break; 1794 } 1795 1796 /* fall through */ 1797 1798 case HCI_INIT_WRITE_SECURE_CONNECTIONS_HOST_ENABLE: 1799 // skip write secure connections host support if not supported or disabled 1800 if (hci_classic_supported() && hci_stack->secure_connections_enable 1801 && hci_command_supported(SUPPORTED_HCI_COMMAND_WRITE_SECURE_CONNECTIONS_HOST)) { 1802 hci_stack->secure_connections_active = true; 1803 hci_stack->substate = HCI_INIT_W4_WRITE_SECURE_CONNECTIONS_HOST_ENABLE; 1804 hci_send_cmd(&hci_write_secure_connections_host_support, 1); 1805 break; 1806 } 1807 1808 #ifdef ENABLE_SCO_OVER_HCI 1809 /* fall through */ 1810 1811 // only sent if ENABLE_SCO_OVER_HCI is defined 1812 case HCI_INIT_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE: 1813 // skip write synchronous flow control if not supported 1814 if (hci_classic_supported() 1815 && hci_command_supported(SUPPORTED_HCI_COMMAND_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE)) { 1816 hci_stack->substate = HCI_INIT_W4_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE; 1817 hci_send_cmd(&hci_write_synchronous_flow_control_enable, 1); // SCO tracking enabled 1818 break; 1819 } 1820 /* fall through */ 1821 1822 case HCI_INIT_WRITE_DEFAULT_ERRONEOUS_DATA_REPORTING: 1823 // skip write default erroneous data reporting if not supported 1824 if (hci_classic_supported() 1825 && hci_command_supported(SUPPORTED_HCI_COMMAND_WRITE_DEFAULT_ERRONEOUS_DATA_REPORTING)) { 1826 hci_stack->substate = HCI_INIT_W4_WRITE_DEFAULT_ERRONEOUS_DATA_REPORTING; 1827 hci_send_cmd(&hci_write_default_erroneous_data_reporting, 1); 1828 break; 1829 } 1830 #endif 1831 1832 #if defined(ENABLE_SCO_OVER_HCI) || defined(ENABLE_SCO_OVER_PCM) 1833 /* fall through */ 1834 1835 // only sent if manufacturer is Broadcom and ENABLE_SCO_OVER_HCI or ENABLE_SCO_OVER_PCM is defined 1836 case HCI_INIT_BCM_WRITE_SCO_PCM_INT: 1837 if (hci_classic_supported() && (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION)){ 1838 hci_stack->substate = HCI_INIT_W4_BCM_WRITE_SCO_PCM_INT; 1839 #ifdef ENABLE_SCO_OVER_HCI 1840 log_info("BCM: Route SCO data via HCI transport"); 1841 hci_send_cmd(&hci_bcm_write_sco_pcm_int, 1, 0, 0, 0, 0); 1842 #endif 1843 #ifdef ENABLE_SCO_OVER_PCM 1844 log_info("BCM: Route SCO data via PCM interface"); 1845 #ifdef ENABLE_BCM_PCM_WBS 1846 // 512 kHz bit clock for 2 channels x 16 bit x 16 kHz 1847 hci_send_cmd(&hci_bcm_write_sco_pcm_int, 0, 2, 0, 1, 1); 1848 #else 1849 // 256 kHz bit clock for 2 channels x 16 bit x 8 kHz 1850 hci_send_cmd(&hci_bcm_write_sco_pcm_int, 0, 1, 0, 1, 1); 1851 #endif 1852 #endif 1853 break; 1854 } 1855 #endif 1856 1857 #ifdef ENABLE_SCO_OVER_PCM 1858 /* fall through */ 1859 1860 case HCI_INIT_BCM_WRITE_I2SPCM_INTERFACE_PARAM: 1861 if (hci_classic_supported() && (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION)){ 1862 hci_stack->substate = HCI_INIT_W4_BCM_WRITE_I2SPCM_INTERFACE_PARAM; 1863 log_info("BCM: Config PCM interface for I2S"); 1864 #ifdef ENABLE_BCM_PCM_WBS 1865 // 512 kHz bit clock for 2 channels x 16 bit x 8 kHz 1866 hci_send_cmd(&hci_bcm_write_i2spcm_interface_param, 1, 1, 0, 2); 1867 #else 1868 // 256 kHz bit clock for 2 channels x 16 bit x 8 kHz 1869 hci_send_cmd(&hci_bcm_write_i2spcm_interface_param, 1, 1, 0, 1); 1870 #endif 1871 break; 1872 } 1873 #endif 1874 #endif 1875 1876 #ifdef ENABLE_BLE 1877 /* fall through */ 1878 1879 // LE INIT 1880 case HCI_INIT_LE_READ_BUFFER_SIZE: 1881 if (hci_le_supported()){ 1882 hci_stack->substate = HCI_INIT_W4_LE_READ_BUFFER_SIZE; 1883 hci_send_cmd(&hci_le_read_buffer_size); 1884 break; 1885 } 1886 1887 /* fall through */ 1888 1889 case HCI_INIT_WRITE_LE_HOST_SUPPORTED: 1890 // skip write le host if not supported (e.g. on LE only EM9301) 1891 if (hci_le_supported() 1892 && hci_command_supported(SUPPORTED_HCI_COMMAND_WRITE_LE_HOST_SUPPORTED)) { 1893 // LE Supported Host = 1, Simultaneous Host = 0 1894 hci_stack->substate = HCI_INIT_W4_WRITE_LE_HOST_SUPPORTED; 1895 hci_send_cmd(&hci_write_le_host_supported, 1, 0); 1896 break; 1897 } 1898 1899 /* fall through */ 1900 1901 case HCI_INIT_LE_SET_EVENT_MASK: 1902 if (hci_le_supported()){ 1903 hci_stack->substate = HCI_INIT_W4_LE_SET_EVENT_MASK; 1904 hci_send_cmd(&hci_le_set_event_mask, 0xfffffdff, 0x07); // all events from core v5.3 without LE Enhanced Connection Complete 1905 break; 1906 } 1907 #endif 1908 1909 #ifdef ENABLE_LE_DATA_LENGTH_EXTENSION 1910 /* fall through */ 1911 1912 case HCI_INIT_LE_READ_MAX_DATA_LENGTH: 1913 if (hci_le_supported() 1914 && hci_command_supported(SUPPORTED_HCI_COMMAND_LE_READ_MAXIMUM_DATA_LENGTH)) { 1915 hci_stack->substate = HCI_INIT_W4_LE_READ_MAX_DATA_LENGTH; 1916 hci_send_cmd(&hci_le_read_maximum_data_length); 1917 break; 1918 } 1919 1920 /* fall through */ 1921 1922 case HCI_INIT_LE_WRITE_SUGGESTED_DATA_LENGTH: 1923 if (hci_le_supported() 1924 && hci_command_supported(SUPPORTED_HCI_COMMAND_LE_WRITE_SUGGESTED_DEFAULT_DATA_LENGTH)) { 1925 hci_stack->substate = HCI_INIT_W4_LE_WRITE_SUGGESTED_DATA_LENGTH; 1926 hci_send_cmd(&hci_le_write_suggested_default_data_length, hci_stack->le_supported_max_tx_octets, hci_stack->le_supported_max_tx_time); 1927 break; 1928 } 1929 #endif 1930 1931 #ifdef ENABLE_LE_CENTRAL 1932 /* fall through */ 1933 1934 case HCI_INIT_READ_WHITE_LIST_SIZE: 1935 if (hci_le_supported()){ 1936 hci_stack->substate = HCI_INIT_W4_READ_WHITE_LIST_SIZE; 1937 hci_send_cmd(&hci_le_read_white_list_size); 1938 break; 1939 } 1940 1941 #endif 1942 1943 #ifdef ENABLE_LE_PERIPHERAL 1944 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 1945 /* fall through */ 1946 1947 case HCI_INIT_LE_READ_MAX_ADV_DATA_LEN: 1948 if (hci_extended_advertising_supported()){ 1949 hci_stack->substate = HCI_INIT_W4_LE_READ_MAX_ADV_DATA_LEN; 1950 hci_send_cmd(&hci_le_read_maximum_advertising_data_length); 1951 break; 1952 } 1953 #endif 1954 #endif 1955 /* fall through */ 1956 1957 case HCI_INIT_DONE: 1958 hci_stack->substate = HCI_INIT_DONE; 1959 // main init sequence complete 1960 #ifdef ENABLE_CLASSIC 1961 // check if initial Classic GAP Tasks are completed 1962 if (hci_classic_supported() && (hci_stack->gap_tasks_classic != 0)) { 1963 hci_run_gap_tasks_classic(); 1964 break; 1965 } 1966 #endif 1967 #ifdef ENABLE_BLE 1968 #ifdef ENABLE_LE_CENTRAL 1969 // check if initial LE GAP Tasks are completed 1970 if (hci_le_supported() && hci_stack->le_scanning_param_update) { 1971 hci_run_general_gap_le(); 1972 break; 1973 } 1974 #endif 1975 #endif 1976 hci_init_done(); 1977 break; 1978 1979 default: 1980 return; 1981 } 1982 } 1983 1984 static bool hci_initializing_event_handler_command_completed(const uint8_t * packet){ 1985 bool command_completed = false; 1986 if (hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_COMPLETE){ 1987 uint16_t opcode = little_endian_read_16(packet,3); 1988 if (opcode == hci_stack->last_cmd_opcode){ 1989 command_completed = true; 1990 log_debug("Command complete for expected opcode %04x at substate %u", opcode, hci_stack->substate); 1991 } else { 1992 log_info("Command complete for different opcode %04x, expected %04x, at substate %u", opcode, hci_stack->last_cmd_opcode, hci_stack->substate); 1993 } 1994 } 1995 1996 if (hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_STATUS){ 1997 uint8_t status = packet[2]; 1998 uint16_t opcode = little_endian_read_16(packet,4); 1999 if (opcode == hci_stack->last_cmd_opcode){ 2000 if (status){ 2001 command_completed = true; 2002 log_debug("Command status error 0x%02x for expected opcode %04x at substate %u", status, opcode, hci_stack->substate); 2003 } else { 2004 log_info("Command status OK for expected opcode %04x, waiting for command complete", opcode); 2005 } 2006 } else { 2007 log_debug("Command status for opcode %04x, expected %04x", opcode, hci_stack->last_cmd_opcode); 2008 } 2009 } 2010 #ifndef HAVE_HOST_CONTROLLER_API 2011 // Vendor == CSR 2012 if ((hci_stack->substate == HCI_INIT_W4_CUSTOM_INIT) && (hci_event_packet_get_type(packet) == HCI_EVENT_VENDOR_SPECIFIC)){ 2013 // TODO: track actual command 2014 command_completed = true; 2015 } 2016 2017 // Vendor == Toshiba 2018 if ((hci_stack->substate == HCI_INIT_W4_SEND_BAUD_CHANGE) && (hci_event_packet_get_type(packet) == HCI_EVENT_VENDOR_SPECIFIC)){ 2019 // TODO: track actual command 2020 command_completed = true; 2021 // Fix: no HCI Command Complete received, so num_cmd_packets not reset 2022 hci_stack->num_cmd_packets = 1; 2023 } 2024 #endif 2025 2026 return command_completed; 2027 } 2028 2029 static void hci_initializing_event_handler(const uint8_t * packet, uint16_t size){ 2030 2031 UNUSED(size); // ok: less than 6 bytes are read from our buffer 2032 2033 bool command_completed = hci_initializing_event_handler_command_completed(packet); 2034 2035 #ifndef HAVE_HOST_CONTROLLER_API 2036 2037 // Late response (> 100 ms) for HCI Reset e.g. on Toshiba TC35661: 2038 // Command complete for HCI Reset arrives after we've resent the HCI Reset command 2039 // 2040 // HCI Reset 2041 // Timeout 100 ms 2042 // HCI Reset 2043 // Command Complete Reset 2044 // HCI Read Local Version Information 2045 // Command Complete Reset - but we expected Command Complete Read Local Version Information 2046 // hang... 2047 // 2048 // Fix: Command Complete for HCI Reset in HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION trigger resend 2049 if (!command_completed 2050 && (hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_COMPLETE) 2051 && (hci_stack->substate == HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION)){ 2052 2053 uint16_t opcode = little_endian_read_16(packet,3); 2054 if (opcode == hci_reset.opcode){ 2055 hci_stack->substate = HCI_INIT_SEND_READ_LOCAL_VERSION_INFORMATION; 2056 return; 2057 } 2058 } 2059 2060 // CSR & H5 2061 // Fix: Command Complete for HCI Reset in HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION trigger resend 2062 if (!command_completed 2063 && (hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_COMPLETE) 2064 && (hci_stack->substate == HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS)){ 2065 2066 uint16_t opcode = little_endian_read_16(packet,3); 2067 if (opcode == hci_reset.opcode){ 2068 hci_stack->substate = HCI_INIT_READ_LOCAL_SUPPORTED_COMMANDS; 2069 return; 2070 } 2071 } 2072 2073 // on CSR with BCSP/H5, the reset resend timeout leads to substate == HCI_INIT_SEND_RESET or HCI_INIT_SEND_RESET_CSR_WARM_BOOT 2074 // fix: Correct substate and behave as command below 2075 if (command_completed){ 2076 switch (hci_stack->substate){ 2077 case HCI_INIT_SEND_RESET: 2078 hci_stack->substate = HCI_INIT_W4_SEND_RESET; 2079 break; 2080 case HCI_INIT_SEND_RESET_CSR_WARM_BOOT: 2081 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT; 2082 break; 2083 default: 2084 break; 2085 } 2086 } 2087 2088 #endif 2089 2090 if (!command_completed) return; 2091 2092 bool need_baud_change = false; 2093 bool need_addr_change = false; 2094 2095 #ifndef HAVE_HOST_CONTROLLER_API 2096 need_baud_change = hci_stack->config 2097 && hci_stack->chipset 2098 && hci_stack->chipset->set_baudrate_command 2099 && hci_stack->hci_transport->set_baudrate 2100 && ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_main; 2101 2102 need_addr_change = hci_stack->custom_bd_addr_set 2103 && hci_stack->chipset 2104 && hci_stack->chipset->set_bd_addr_command; 2105 #endif 2106 2107 switch(hci_stack->substate){ 2108 2109 #ifndef HAVE_HOST_CONTROLLER_API 2110 case HCI_INIT_SEND_RESET: 2111 // on CSR with BCSP/H5, resend triggers resend of HCI Reset and leads to substate == HCI_INIT_SEND_RESET 2112 // fix: just correct substate and behave as command below 2113 2114 /* fall through */ 2115 #endif 2116 2117 case HCI_INIT_W4_SEND_RESET: 2118 btstack_run_loop_remove_timer(&hci_stack->timeout); 2119 hci_stack->substate = HCI_INIT_SEND_READ_LOCAL_VERSION_INFORMATION; 2120 return; 2121 2122 #ifndef HAVE_HOST_CONTROLLER_API 2123 case HCI_INIT_W4_SEND_BAUD_CHANGE: 2124 // for STLC2500D, baud rate change already happened. 2125 // for others, baud rate gets changed now 2126 if ((hci_stack->manufacturer != BLUETOOTH_COMPANY_ID_ST_MICROELECTRONICS) && need_baud_change){ 2127 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 2128 log_info("Local baud rate change to %" PRIu32 "(w4_send_baud_change)", baud_rate); 2129 hci_stack->hci_transport->set_baudrate(baud_rate); 2130 } 2131 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 2132 return; 2133 case HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT: 2134 btstack_run_loop_remove_timer(&hci_stack->timeout); 2135 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 2136 return; 2137 case HCI_INIT_W4_CUSTOM_INIT: 2138 // repeat custom init 2139 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 2140 return; 2141 #endif 2142 2143 case HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS: 2144 if (need_baud_change && (hci_stack->chipset_result != BTSTACK_CHIPSET_NO_INIT_SCRIPT) && 2145 ((hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION) || 2146 (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_EM_MICROELECTRONIC_MARIN_SA))) { 2147 hci_stack->substate = HCI_INIT_SEND_BAUD_CHANGE_BCM; 2148 return; 2149 } 2150 if (need_addr_change){ 2151 hci_stack->substate = HCI_INIT_SET_BD_ADDR; 2152 return; 2153 } 2154 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 2155 return; 2156 #ifndef HAVE_HOST_CONTROLLER_API 2157 case HCI_INIT_W4_SEND_BAUD_CHANGE_BCM: 2158 if (need_baud_change){ 2159 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 2160 log_info("Local baud rate change to %" PRIu32 "(w4_send_baud_change_bcm))", baud_rate); 2161 hci_stack->hci_transport->set_baudrate(baud_rate); 2162 } 2163 if (need_addr_change){ 2164 hci_stack->substate = HCI_INIT_SET_BD_ADDR; 2165 return; 2166 } 2167 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 2168 return; 2169 case HCI_INIT_W4_SET_BD_ADDR: 2170 // for STLC2500D + ATWILC3000, bd addr change only gets active after sending reset command 2171 if ((hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_ST_MICROELECTRONICS) 2172 || (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_ATMEL_CORPORATION)){ 2173 hci_stack->substate = HCI_INIT_SEND_RESET_ST_WARM_BOOT; 2174 return; 2175 } 2176 // skipping st warm boot 2177 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 2178 return; 2179 case HCI_INIT_W4_SEND_RESET_ST_WARM_BOOT: 2180 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 2181 return; 2182 #endif 2183 2184 case HCI_INIT_DONE: 2185 // set state if we came here by fall through 2186 hci_stack->substate = HCI_INIT_DONE; 2187 return; 2188 2189 default: 2190 break; 2191 } 2192 hci_initializing_next_state(); 2193 } 2194 2195 static void hci_handle_connection_failed(hci_connection_t * conn, uint8_t status){ 2196 // CC2564C might emit Connection Complete for rejected incoming SCO connection 2197 // To prevent accidentally free'ing the CHI connection for the ACL connection, 2198 // check if the hci connection has been outgoing 2199 switch (conn->state){ 2200 case SEND_CREATE_CONNECTION: 2201 case RECEIVED_CONNECTION_REQUEST: 2202 break; 2203 default: 2204 return; 2205 } 2206 2207 log_info("Outgoing connection to %s failed", bd_addr_to_str(conn->address)); 2208 bd_addr_t bd_address; 2209 (void)memcpy(&bd_address, conn->address, 6); 2210 2211 #ifdef ENABLE_CLASSIC 2212 // cache needed data 2213 int notify_dedicated_bonding_failed = conn->bonding_flags & BONDING_DEDICATED; 2214 #endif 2215 2216 // connection failed, remove entry 2217 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 2218 btstack_memory_hci_connection_free( conn ); 2219 2220 #ifdef ENABLE_CLASSIC 2221 // notify client if dedicated bonding 2222 if (notify_dedicated_bonding_failed){ 2223 log_info("hci notify_dedicated_bonding_failed"); 2224 hci_emit_dedicated_bonding_result(bd_address, status); 2225 } 2226 2227 // if authentication error, also delete link key 2228 if (status == ERROR_CODE_AUTHENTICATION_FAILURE) { 2229 gap_drop_link_key_for_bd_addr(bd_address); 2230 } 2231 #else 2232 UNUSED(status); 2233 #endif 2234 } 2235 2236 #ifdef ENABLE_CLASSIC 2237 static void hci_handle_remote_features_page_0(hci_connection_t * conn, const uint8_t * features){ 2238 // SSP Controller 2239 if (features[6] & (1 << 3)){ 2240 conn->bonding_flags |= BONDING_REMOTE_SUPPORTS_SSP_CONTROLLER; 2241 } 2242 // eSCO 2243 if (features[3] & (1<<7)){ 2244 conn->remote_supported_features[0] |= 1; 2245 } 2246 // Extended features 2247 if (features[7] & (1<<7)){ 2248 conn->remote_supported_features[0] |= 2; 2249 } 2250 } 2251 2252 static void hci_handle_remote_features_page_1(hci_connection_t * conn, const uint8_t * features){ 2253 // SSP Host 2254 if (features[0] & (1 << 0)){ 2255 conn->bonding_flags |= BONDING_REMOTE_SUPPORTS_SSP_HOST; 2256 } 2257 // SC Host 2258 if (features[0] & (1 << 3)){ 2259 conn->bonding_flags |= BONDING_REMOTE_SUPPORTS_SC_HOST; 2260 } 2261 } 2262 2263 static void hci_handle_remote_features_page_2(hci_connection_t * conn, const uint8_t * features){ 2264 // SC Controller 2265 if (features[1] & (1 << 0)){ 2266 conn->bonding_flags |= BONDING_REMOTE_SUPPORTS_SC_CONTROLLER; 2267 } 2268 } 2269 2270 static void hci_handle_remote_features_received(hci_connection_t * conn){ 2271 conn->bonding_flags &= ~BONDING_REMOTE_FEATURES_QUERY_ACTIVE; 2272 conn->bonding_flags |= BONDING_RECEIVED_REMOTE_FEATURES; 2273 log_info("Remote features %02x, bonding flags %x", conn->remote_supported_features[0], conn->bonding_flags); 2274 if (conn->bonding_flags & BONDING_DEDICATED){ 2275 conn->bonding_flags |= BONDING_SEND_AUTHENTICATE_REQUEST; 2276 } 2277 } 2278 static bool hci_remote_sc_enabled(hci_connection_t * connection){ 2279 const uint16_t sc_enabled_mask = BONDING_REMOTE_SUPPORTS_SC_HOST | BONDING_REMOTE_SUPPORTS_SC_CONTROLLER; 2280 return (connection->bonding_flags & sc_enabled_mask) == sc_enabled_mask; 2281 } 2282 2283 #endif 2284 2285 static void handle_event_for_current_stack_state(const uint8_t * packet, uint16_t size) { 2286 // handle BT initialization 2287 if (hci_stack->state == HCI_STATE_INITIALIZING) { 2288 hci_initializing_event_handler(packet, size); 2289 } 2290 2291 // help with BT sleep 2292 if ((hci_stack->state == HCI_STATE_FALLING_ASLEEP) 2293 && (hci_stack->substate == HCI_FALLING_ASLEEP_W4_WRITE_SCAN_ENABLE) 2294 && (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_write_scan_enable))) { 2295 hci_initializing_next_state(); 2296 } 2297 } 2298 2299 #ifdef ENABLE_CLASSIC 2300 static void hci_handle_read_encryption_key_size_complete(hci_connection_t * conn, uint8_t encryption_key_size) { 2301 conn->authentication_flags |= AUTH_FLAG_CONNECTION_ENCRYPTED; 2302 conn->encryption_key_size = encryption_key_size; 2303 2304 if ((conn->authentication_flags & AUTH_FLAG_CONNECTION_AUTHENTICATED) != 0) { 2305 conn->requested_security_level = LEVEL_0; 2306 hci_emit_security_level(conn->con_handle, gap_security_level_for_connection(conn)); 2307 return; 2308 } 2309 2310 // Request remote features if not already done 2311 hci_trigger_remote_features_for_connection(conn); 2312 2313 // Request Authentication if not already done 2314 if ((conn->bonding_flags & BONDING_SENT_AUTHENTICATE_REQUEST) != 0) return; 2315 conn->bonding_flags |= BONDING_SEND_AUTHENTICATE_REQUEST; 2316 } 2317 #endif 2318 2319 static void hci_store_local_supported_commands(const uint8_t * packet){ 2320 // create mapping table 2321 #define X(name, offset, bit) { offset, bit }, 2322 static struct { 2323 uint8_t byte_offset; 2324 uint8_t bit_position; 2325 } supported_hci_commands_map [] = { 2326 SUPPORTED_HCI_COMMANDS 2327 }; 2328 #undef X 2329 2330 // create names for debug purposes 2331 #ifdef ENABLE_LOG_DEBUG 2332 #define X(name, offset, bit) #name, 2333 static const char * command_names[] = { 2334 SUPPORTED_HCI_COMMANDS 2335 }; 2336 #undef X 2337 #endif 2338 2339 hci_stack->local_supported_commands = 0; 2340 const uint8_t * commands_map = &packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1]; 2341 uint16_t i; 2342 for (i = 0 ; i < SUPPORTED_HCI_COMMANDS_COUNT ; i++){ 2343 if ((commands_map[supported_hci_commands_map[i].byte_offset] & (1 << supported_hci_commands_map[i].bit_position)) != 0){ 2344 #ifdef ENABLE_LOG_DEBUG 2345 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); 2346 #else 2347 log_info("Command 0x%02x supported %u/%u", i, supported_hci_commands_map[i].byte_offset, supported_hci_commands_map[i].bit_position); 2348 #endif 2349 hci_stack->local_supported_commands |= (1LU << i); 2350 } 2351 } 2352 log_info("Local supported commands summary %04x", hci_stack->local_supported_commands); 2353 } 2354 2355 static void handle_command_complete_event(uint8_t * packet, uint16_t size){ 2356 UNUSED(size); 2357 2358 uint16_t manufacturer; 2359 #ifdef ENABLE_CLASSIC 2360 hci_con_handle_t handle; 2361 hci_connection_t * conn; 2362 uint8_t status; 2363 #endif 2364 // get num cmd packets - limit to 1 to reduce complexity 2365 hci_stack->num_cmd_packets = packet[2] ? 1 : 0; 2366 2367 uint16_t opcode = hci_event_command_complete_get_command_opcode(packet); 2368 switch (opcode){ 2369 case HCI_OPCODE_HCI_READ_LOCAL_NAME: 2370 if (packet[5]) break; 2371 // terminate, name 248 chars 2372 packet[6+248] = 0; 2373 log_info("local name: %s", &packet[6]); 2374 break; 2375 case HCI_OPCODE_HCI_READ_BUFFER_SIZE: 2376 // "The HC_ACL_Data_Packet_Length return parameter will be used to determine the size of the L2CAP segments contained in ACL Data Packets" 2377 if (hci_stack->state == HCI_STATE_INITIALIZING) { 2378 uint16_t acl_len = little_endian_read_16(packet, 6); 2379 uint16_t sco_len = packet[8]; 2380 2381 // determine usable ACL/SCO payload size 2382 hci_stack->acl_data_packet_length = btstack_min(acl_len, HCI_ACL_PAYLOAD_SIZE); 2383 hci_stack->sco_data_packet_length = btstack_min(sco_len, HCI_ACL_PAYLOAD_SIZE); 2384 2385 hci_stack->acl_packets_total_num = little_endian_read_16(packet, 9); 2386 hci_stack->sco_packets_total_num = little_endian_read_16(packet, 11); 2387 2388 log_info("hci_read_buffer_size: ACL size module %u -> used %u, count %u / SCO size %u, count %u", 2389 acl_len, hci_stack->acl_data_packet_length, hci_stack->acl_packets_total_num, 2390 hci_stack->sco_data_packet_length, hci_stack->sco_packets_total_num); 2391 } 2392 break; 2393 case HCI_OPCODE_HCI_READ_RSSI: 2394 if (packet[5] == ERROR_CODE_SUCCESS){ 2395 uint8_t event[5]; 2396 event[0] = GAP_EVENT_RSSI_MEASUREMENT; 2397 event[1] = 3; 2398 (void)memcpy(&event[2], &packet[6], 3); 2399 hci_emit_event(event, sizeof(event), 1); 2400 } 2401 break; 2402 #ifdef ENABLE_BLE 2403 case HCI_OPCODE_HCI_LE_READ_BUFFER_SIZE: 2404 hci_stack->le_data_packets_length = little_endian_read_16(packet, 6); 2405 hci_stack->le_acl_packets_total_num = packet[8]; 2406 // determine usable ACL payload size 2407 if (HCI_ACL_PAYLOAD_SIZE < hci_stack->le_data_packets_length){ 2408 hci_stack->le_data_packets_length = HCI_ACL_PAYLOAD_SIZE; 2409 } 2410 log_info("hci_le_read_buffer_size: size %u, count %u", hci_stack->le_data_packets_length, hci_stack->le_acl_packets_total_num); 2411 break; 2412 #endif 2413 #ifdef ENABLE_LE_DATA_LENGTH_EXTENSION 2414 case HCI_OPCODE_HCI_LE_READ_MAXIMUM_DATA_LENGTH: 2415 hci_stack->le_supported_max_tx_octets = little_endian_read_16(packet, 6); 2416 hci_stack->le_supported_max_tx_time = little_endian_read_16(packet, 8); 2417 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); 2418 break; 2419 #endif 2420 #ifdef ENABLE_LE_CENTRAL 2421 case HCI_OPCODE_HCI_LE_READ_WHITE_LIST_SIZE: 2422 hci_stack->le_whitelist_capacity = packet[6]; 2423 log_info("hci_le_read_white_list_size: size %u", hci_stack->le_whitelist_capacity); 2424 break; 2425 #endif 2426 #ifdef ENABLE_LE_PERIPHERAL 2427 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 2428 case HCI_OPCODE_HCI_LE_READ_MAXIMUM_ADVERTISING_DATA_LENGTH: 2429 hci_stack->le_maximum_advertising_data_length = little_endian_read_16(packet, 6); 2430 break; 2431 case HCI_OPCODE_HCI_LE_SET_EXTENDED_ADVERTISING_PARAMETERS: 2432 if (hci_stack->le_advertising_set_in_current_command != 0) { 2433 le_advertising_set_t * advertising_set = hci_advertising_set_for_handle(hci_stack->le_advertising_set_in_current_command); 2434 hci_stack->le_advertising_set_in_current_command = 0; 2435 if (advertising_set == NULL) break; 2436 uint8_t adv_status = packet[6]; 2437 uint8_t tx_power = packet[7]; 2438 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 }; 2439 if (adv_status == 0){ 2440 advertising_set->state |= LE_ADVERTISEMENT_STATE_PARAMS_SET; 2441 } 2442 hci_emit_event(event, sizeof(event), 1); 2443 } 2444 break; 2445 case HCI_OPCODE_HCI_LE_REMOVE_ADVERTISING_SET: 2446 if (hci_stack->le_advertising_set_in_current_command != 0) { 2447 le_advertising_set_t * advertising_set = hci_advertising_set_for_handle(hci_stack->le_advertising_set_in_current_command); 2448 hci_stack->le_advertising_set_in_current_command = 0; 2449 if (advertising_set == NULL) break; 2450 uint8_t adv_status = packet[5]; 2451 uint8_t event[] = { HCI_EVENT_META_GAP, 3, GAP_SUBEVENT_ADVERTISING_SET_REMOVED, hci_stack->le_advertising_set_in_current_command, adv_status }; 2452 if (adv_status == 0){ 2453 btstack_linked_list_remove(&hci_stack->le_advertising_sets, (btstack_linked_item_t *) advertising_set); 2454 } 2455 hci_emit_event(event, sizeof(event), 1); 2456 } 2457 break; 2458 #endif 2459 #endif 2460 case HCI_OPCODE_HCI_READ_BD_ADDR: 2461 reverse_bd_addr(&packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE + 1], hci_stack->local_bd_addr); 2462 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)); 2463 #ifdef ENABLE_CLASSIC 2464 if (hci_stack->link_key_db){ 2465 hci_stack->link_key_db->set_local_bd_addr(hci_stack->local_bd_addr); 2466 } 2467 #endif 2468 break; 2469 #ifdef ENABLE_CLASSIC 2470 case HCI_OPCODE_HCI_WRITE_SCAN_ENABLE: 2471 hci_emit_discoverable_enabled(hci_stack->discoverable); 2472 break; 2473 case HCI_OPCODE_HCI_INQUIRY_CANCEL: 2474 if (hci_stack->inquiry_state == GAP_INQUIRY_STATE_W4_CANCELLED){ 2475 hci_stack->inquiry_state = GAP_INQUIRY_STATE_IDLE; 2476 uint8_t event[] = { GAP_EVENT_INQUIRY_COMPLETE, 1, 0}; 2477 hci_emit_event(event, sizeof(event), 1); 2478 } 2479 break; 2480 #endif 2481 case HCI_OPCODE_HCI_READ_LOCAL_SUPPORTED_FEATURES: 2482 (void)memcpy(hci_stack->local_supported_features, &packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE + 1], 8); 2483 2484 #ifdef ENABLE_CLASSIC 2485 // determine usable ACL packet types based on host buffer size and supported features 2486 hci_stack->packet_types = hci_acl_packet_types_for_buffer_size_and_local_features(HCI_ACL_PAYLOAD_SIZE, &hci_stack->local_supported_features[0]); 2487 log_info("Packet types %04x, eSCO %u", hci_stack->packet_types, hci_extended_sco_link_supported()); 2488 #endif 2489 // Classic/LE 2490 log_info("BR/EDR support %u, LE support %u", hci_classic_supported(), hci_le_supported()); 2491 break; 2492 case HCI_OPCODE_HCI_READ_LOCAL_VERSION_INFORMATION: 2493 manufacturer = little_endian_read_16(packet, 10); 2494 // map Cypress to Broadcom 2495 if (manufacturer == BLUETOOTH_COMPANY_ID_CYPRESS_SEMICONDUCTOR){ 2496 log_info("Treat Cypress as Broadcom"); 2497 manufacturer = BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION; 2498 little_endian_store_16(packet, 10, manufacturer); 2499 } 2500 hci_stack->manufacturer = manufacturer; 2501 log_info("Manufacturer: 0x%04x", hci_stack->manufacturer); 2502 break; 2503 case HCI_OPCODE_HCI_READ_LOCAL_SUPPORTED_COMMANDS: 2504 hci_store_local_supported_commands(packet); 2505 break; 2506 #ifdef ENABLE_CLASSIC 2507 case HCI_OPCODE_HCI_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE: 2508 if (packet[5]) return; 2509 hci_stack->synchronous_flow_control_enabled = 1; 2510 break; 2511 case HCI_OPCODE_HCI_READ_ENCRYPTION_KEY_SIZE: 2512 status = packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE]; 2513 handle = little_endian_read_16(packet, OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1); 2514 conn = hci_connection_for_handle(handle); 2515 if (conn != NULL) { 2516 uint8_t key_size = 0; 2517 if (status == 0){ 2518 key_size = packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+3]; 2519 log_info("Handle %04x key Size: %u", handle, key_size); 2520 } else { 2521 key_size = 1; 2522 log_info("Read Encryption Key Size failed 0x%02x-> assuming insecure connection with key size of 1", status); 2523 } 2524 hci_handle_read_encryption_key_size_complete(conn, key_size); 2525 } 2526 break; 2527 // assert pairing complete event is emitted. 2528 // note: for SSP, Simple Pairing Complete Event is sufficient, but we want to be more robust 2529 case HCI_OPCODE_HCI_PIN_CODE_REQUEST_NEGATIVE_REPLY: 2530 case HCI_OPCODE_HCI_USER_PASSKEY_REQUEST_NEGATIVE_REPLY: 2531 case HCI_OPCODE_HCI_USER_CONFIRMATION_REQUEST_NEGATIVE_REPLY: 2532 hci_stack->gap_pairing_state = GAP_PAIRING_STATE_IDLE; 2533 // lookup connection by gap pairing addr 2534 conn = hci_connection_for_bd_addr_and_type(hci_stack->gap_pairing_addr, BD_ADDR_TYPE_ACL); 2535 if (conn == NULL) break; 2536 hci_pairing_complete(conn, ERROR_CODE_AUTHENTICATION_FAILURE); 2537 break; 2538 2539 #ifdef ENABLE_CLASSIC_PAIRING_OOB 2540 case HCI_OPCODE_HCI_READ_LOCAL_OOB_DATA: 2541 case HCI_OPCODE_HCI_READ_LOCAL_EXTENDED_OOB_DATA:{ 2542 uint8_t event[67]; 2543 event[0] = GAP_EVENT_LOCAL_OOB_DATA; 2544 event[1] = 65; 2545 (void)memset(&event[2], 0, 65); 2546 if (packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE] == ERROR_CODE_SUCCESS){ 2547 (void)memcpy(&event[3], &packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1], 32); 2548 if (opcode == HCI_OPCODE_HCI_READ_LOCAL_EXTENDED_OOB_DATA){ 2549 event[2] = 3; 2550 (void)memcpy(&event[35], &packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+33], 32); 2551 } else { 2552 event[2] = 1; 2553 } 2554 } 2555 hci_emit_event(event, sizeof(event), 0); 2556 break; 2557 } 2558 2559 // note: only needed if user does not provide OOB data 2560 case HCI_OPCODE_HCI_REMOTE_OOB_DATA_REQUEST_NEGATIVE_REPLY: 2561 conn = hci_connection_for_handle(hci_stack->classic_oob_con_handle); 2562 hci_stack->classic_oob_con_handle = HCI_CON_HANDLE_INVALID; 2563 if (conn == NULL) break; 2564 hci_pairing_complete(conn, ERROR_CODE_AUTHENTICATION_FAILURE); 2565 break; 2566 #endif 2567 #endif 2568 default: 2569 break; 2570 } 2571 } 2572 2573 #ifdef ENABLE_BLE 2574 static void event_handle_le_connection_complete(const uint8_t * packet){ 2575 bd_addr_t addr; 2576 bd_addr_type_t addr_type; 2577 hci_connection_t * conn; 2578 2579 // Connection management 2580 reverse_bd_addr(&packet[8], addr); 2581 addr_type = (bd_addr_type_t)packet[7]; 2582 log_info("LE Connection_complete (status=%u) type %u, %s", packet[3], addr_type, bd_addr_to_str(addr)); 2583 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 2584 2585 #ifdef ENABLE_LE_CENTRAL 2586 // handle error: error is reported only to the initiator -> outgoing connection 2587 if (packet[3]){ 2588 2589 // handle cancelled outgoing connection 2590 // "If the cancellation was successful then, after the Command Complete event for the LE_Create_Connection_Cancel command, 2591 // either an LE Connection Complete or an LE Enhanced Connection Complete event shall be generated. 2592 // In either case, the event shall be sent with the error code Unknown Connection Identifier (0x02)." 2593 if (packet[3] == ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER){ 2594 // reset state 2595 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 2596 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 2597 // get outgoing connection conn struct for direct connect 2598 conn = gap_get_outgoing_connection(); 2599 } 2600 2601 // outgoing le connection establishment is done 2602 if (conn){ 2603 // remove entry 2604 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 2605 btstack_memory_hci_connection_free( conn ); 2606 } 2607 return; 2608 } 2609 #endif 2610 2611 // on success, both hosts receive connection complete event 2612 if (packet[6] == HCI_ROLE_MASTER){ 2613 #ifdef ENABLE_LE_CENTRAL 2614 // if we're master on an le connection, it was an outgoing connection and we're done with it 2615 // note: no hci_connection_t object exists yet for connect with whitelist 2616 if (hci_is_le_connection_type(addr_type)){ 2617 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 2618 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 2619 } 2620 #endif 2621 } else { 2622 #ifdef ENABLE_LE_PERIPHERAL 2623 // if we're slave, it was an incoming connection, advertisements have stopped 2624 hci_stack->le_advertisements_state &= ~LE_ADVERTISEMENT_STATE_ACTIVE; 2625 #endif 2626 } 2627 2628 // LE connections are auto-accepted, so just create a connection if there isn't one already 2629 if (!conn){ 2630 conn = create_connection_for_bd_addr_and_type(addr, addr_type); 2631 } 2632 2633 // no memory, sorry. 2634 if (!conn){ 2635 return; 2636 } 2637 2638 conn->state = OPEN; 2639 conn->role = packet[6]; 2640 conn->con_handle = hci_subevent_le_connection_complete_get_connection_handle(packet); 2641 conn->le_connection_interval = hci_subevent_le_connection_complete_get_conn_interval(packet); 2642 2643 #ifdef ENABLE_LE_PERIPHERAL 2644 if (packet[6] == HCI_ROLE_SLAVE){ 2645 hci_update_advertisements_enabled_for_current_roles(); 2646 } 2647 #endif 2648 2649 // init unenhanced att bearer mtu 2650 conn->att_connection.mtu = ATT_DEFAULT_MTU; 2651 conn->att_connection.mtu_exchanged = false; 2652 2653 // TODO: store - role, peer address type, conn_interval, conn_latency, supervision timeout, master clock 2654 2655 // restart timer 2656 // btstack_run_loop_set_timer(&conn->timeout, HCI_CONNECTION_TIMEOUT_MS); 2657 // btstack_run_loop_add_timer(&conn->timeout); 2658 2659 log_info("New connection: handle %u, %s", conn->con_handle, bd_addr_to_str(conn->address)); 2660 2661 hci_emit_nr_connections_changed(); 2662 } 2663 #endif 2664 2665 #ifdef ENABLE_CLASSIC 2666 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){ 2667 if (io_cap_local == SSP_IO_CAPABILITY_UNKNOWN) return false; 2668 // LEVEL_4 is tested by l2cap 2669 // LEVEL 3 requires MITM protection -> check io capabilities if Authenticated is possible 2670 // @see: Core Spec v5.3, Vol 3, Part C, Table 5.7 2671 if (level >= LEVEL_3){ 2672 // MITM not possible without keyboard or display 2673 if (io_cap_remote >= SSP_IO_CAPABILITY_NO_INPUT_NO_OUTPUT) return false; 2674 if (io_cap_local >= SSP_IO_CAPABILITY_NO_INPUT_NO_OUTPUT) return false; 2675 2676 // MITM possible if one side has keyboard and the other has keyboard or display 2677 if (io_cap_remote == SSP_IO_CAPABILITY_KEYBOARD_ONLY) return true; 2678 if (io_cap_local == SSP_IO_CAPABILITY_KEYBOARD_ONLY) return true; 2679 2680 // MITM not possible if one side has only display and other side has no keyboard 2681 if (io_cap_remote == SSP_IO_CAPABILITY_DISPLAY_ONLY) return false; 2682 if (io_cap_local == SSP_IO_CAPABILITY_DISPLAY_ONLY) return false; 2683 } 2684 // LEVEL 2 requires SSP, which is a given 2685 return true; 2686 } 2687 2688 static bool btstack_is_null(uint8_t * data, uint16_t size){ 2689 uint16_t i; 2690 for (i=0; i < size ; i++){ 2691 if (data[i] != 0) { 2692 return false; 2693 } 2694 } 2695 return true; 2696 } 2697 2698 static void hci_ssp_assess_security_on_io_cap_request(hci_connection_t * conn){ 2699 // get requested security level 2700 gap_security_level_t requested_security_level = conn->requested_security_level; 2701 if (hci_stack->gap_secure_connections_only_mode){ 2702 requested_security_level = LEVEL_4; 2703 } 2704 2705 // assess security: LEVEL 4 requires SC 2706 // skip this preliminary test if remote features are not available yet to work around potential issue in ESP32 controller 2707 if ((requested_security_level == LEVEL_4) && 2708 ((conn->bonding_flags & BONDING_RECEIVED_REMOTE_FEATURES) != 0) && 2709 !hci_remote_sc_enabled(conn)){ 2710 log_info("Level 4 required, but SC not supported -> abort"); 2711 hci_pairing_complete(conn, ERROR_CODE_INSUFFICIENT_SECURITY); 2712 connectionSetAuthenticationFlags(conn, AUTH_FLAG_SEND_IO_CAPABILITIES_NEGATIVE_REPLY); 2713 return; 2714 } 2715 2716 // assess security based on io capabilities 2717 if (conn->authentication_flags & AUTH_FLAG_RECV_IO_CAPABILITIES_RESPONSE){ 2718 // responder: fully validate io caps of both sides as well as OOB data 2719 bool security_possible = false; 2720 security_possible = hci_ssp_security_level_possible_for_io_cap(requested_security_level, hci_stack->ssp_io_capability, conn->io_cap_response_io); 2721 2722 #ifdef ENABLE_CLASSIC_PAIRING_OOB 2723 // We assume that both Controller can reach LEVEL 4, if one side has received P-192 and the other has received P-256, 2724 // so we merge the OOB data availability 2725 uint8_t have_oob_data = conn->io_cap_response_oob_data; 2726 if (conn->classic_oob_c_192 != NULL){ 2727 have_oob_data |= 1; 2728 } 2729 if (conn->classic_oob_c_256 != NULL){ 2730 have_oob_data |= 2; 2731 } 2732 // for up to Level 3, either P-192 as well as P-256 will do 2733 // 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 2734 // if remote does not SC, we should not receive P-256 data either 2735 if ((requested_security_level <= LEVEL_3) && (have_oob_data != 0)){ 2736 security_possible = true; 2737 } 2738 // for Level 4, P-256 is needed 2739 if ((requested_security_level == LEVEL_4 && ((have_oob_data & 2) != 0))){ 2740 security_possible = true; 2741 } 2742 #endif 2743 2744 if (security_possible == false){ 2745 log_info("IOCap/OOB insufficient for level %u -> abort", requested_security_level); 2746 hci_pairing_complete(conn, ERROR_CODE_INSUFFICIENT_SECURITY); 2747 connectionSetAuthenticationFlags(conn, AUTH_FLAG_SEND_IO_CAPABILITIES_NEGATIVE_REPLY); 2748 return; 2749 } 2750 } else { 2751 // initiator: remote io cap not yet, only check if we have ability for MITM protection if requested and OOB is not supported 2752 #ifndef ENABLE_CLASSIC_PAIRING_OOB 2753 #ifndef ENABLE_EXPLICIT_IO_CAPABILITIES_REPLY 2754 if ((conn->requested_security_level >= LEVEL_3) && (hci_stack->ssp_io_capability >= SSP_IO_CAPABILITY_NO_INPUT_NO_OUTPUT)){ 2755 log_info("Level 3+ required, but no input/output -> abort"); 2756 hci_pairing_complete(conn, ERROR_CODE_INSUFFICIENT_SECURITY); 2757 connectionSetAuthenticationFlags(conn, AUTH_FLAG_SEND_IO_CAPABILITIES_NEGATIVE_REPLY); 2758 return; 2759 } 2760 #endif 2761 #endif 2762 } 2763 2764 #ifndef ENABLE_EXPLICIT_IO_CAPABILITIES_REPLY 2765 if (hci_stack->ssp_io_capability != SSP_IO_CAPABILITY_UNKNOWN){ 2766 connectionSetAuthenticationFlags(conn, AUTH_FLAG_SEND_IO_CAPABILITIES_REPLY); 2767 } else { 2768 connectionSetAuthenticationFlags(conn, AUTH_FLAG_SEND_IO_CAPABILITIES_NEGATIVE_REPLY); 2769 } 2770 #endif 2771 } 2772 2773 #endif 2774 2775 static void event_handler(uint8_t *packet, uint16_t size){ 2776 2777 uint16_t event_length = packet[1]; 2778 2779 // assert packet is complete 2780 if (size != (event_length + 2u)){ 2781 log_error("event_handler called with packet of wrong size %d, expected %u => dropping packet", size, event_length + 2); 2782 return; 2783 } 2784 2785 bd_addr_type_t addr_type; 2786 hci_con_handle_t handle; 2787 hci_connection_t * conn; 2788 int i; 2789 int create_connection_cmd; 2790 2791 #ifdef ENABLE_CLASSIC 2792 hci_link_type_t link_type; 2793 bd_addr_t addr; 2794 #endif 2795 2796 // log_info("HCI:EVENT:%02x", hci_event_packet_get_type(packet)); 2797 2798 switch (hci_event_packet_get_type(packet)) { 2799 2800 case HCI_EVENT_COMMAND_COMPLETE: 2801 handle_command_complete_event(packet, size); 2802 break; 2803 2804 case HCI_EVENT_COMMAND_STATUS: 2805 // get num cmd packets - limit to 1 to reduce complexity 2806 hci_stack->num_cmd_packets = packet[3] ? 1 : 0; 2807 2808 // check command status to detected failed outgoing connections 2809 create_connection_cmd = 0; 2810 #ifdef ENABLE_CLASSIC 2811 if (HCI_EVENT_IS_COMMAND_STATUS(packet, hci_create_connection)){ 2812 create_connection_cmd = 1; 2813 } 2814 if (HCI_EVENT_IS_COMMAND_STATUS(packet, hci_accept_synchronous_connection)){ 2815 create_connection_cmd = 1; 2816 } 2817 #endif 2818 #ifdef ENABLE_LE_CENTRAL 2819 if (HCI_EVENT_IS_COMMAND_STATUS(packet, hci_le_create_connection)){ 2820 create_connection_cmd = 1; 2821 } 2822 #endif 2823 if (create_connection_cmd) { 2824 uint8_t status = hci_event_command_status_get_status(packet); 2825 addr_type = hci_stack->outgoing_addr_type; 2826 conn = hci_connection_for_bd_addr_and_type(hci_stack->outgoing_addr, addr_type); 2827 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); 2828 2829 // reset outgoing address info 2830 memset(hci_stack->outgoing_addr, 0, 6); 2831 hci_stack->outgoing_addr_type = BD_ADDR_TYPE_UNKNOWN; 2832 2833 // on error 2834 if (status != ERROR_CODE_SUCCESS){ 2835 #ifdef ENABLE_LE_CENTRAL 2836 if (hci_is_le_connection_type(addr_type)){ 2837 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 2838 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 2839 } 2840 #endif 2841 // error => outgoing connection failed 2842 if (conn != NULL){ 2843 hci_handle_connection_failed(conn, status); 2844 } 2845 } 2846 } 2847 2848 #ifdef ENABLE_CLASSIC 2849 if (HCI_EVENT_IS_COMMAND_STATUS(packet, hci_inquiry)) { 2850 uint8_t status = hci_event_command_status_get_status(packet); 2851 log_info("command status (inquiry), status %x", status); 2852 if (status == ERROR_CODE_SUCCESS) { 2853 hci_stack->inquiry_state = GAP_INQUIRY_STATE_ACTIVE; 2854 } else { 2855 hci_stack->inquiry_state = GAP_INQUIRY_STATE_IDLE; 2856 } 2857 } 2858 #endif 2859 break; 2860 2861 case HCI_EVENT_NUMBER_OF_COMPLETED_PACKETS:{ 2862 if (size < 3) return; 2863 uint16_t num_handles = packet[2]; 2864 if (size != (3u + num_handles * 4u)) return; 2865 uint16_t offset = 3; 2866 for (i=0; i<num_handles;i++){ 2867 handle = little_endian_read_16(packet, offset) & 0x0fffu; 2868 offset += 2u; 2869 uint16_t num_packets = little_endian_read_16(packet, offset); 2870 offset += 2u; 2871 2872 conn = hci_connection_for_handle(handle); 2873 if (!conn){ 2874 log_error("hci_number_completed_packet lists unused con handle %u", handle); 2875 continue; 2876 } 2877 2878 if (conn->num_packets_sent >= num_packets){ 2879 conn->num_packets_sent -= num_packets; 2880 } else { 2881 log_error("hci_number_completed_packets, more packet slots freed then sent."); 2882 conn->num_packets_sent = 0; 2883 } 2884 // log_info("hci_number_completed_packet %u processed for handle %u, outstanding %u", num_packets, handle, conn->num_packets_sent); 2885 2886 #ifdef ENABLE_CLASSIC 2887 // For SCO, we do the can_send_now_check here 2888 hci_notify_if_sco_can_send_now(); 2889 #endif 2890 } 2891 break; 2892 } 2893 2894 #ifdef ENABLE_CLASSIC 2895 case HCI_EVENT_FLUSH_OCCURRED: 2896 // flush occurs only if automatic flush has been enabled by gap_enable_link_watchdog() 2897 handle = hci_event_flush_occurred_get_handle(packet); 2898 conn = hci_connection_for_handle(handle); 2899 if (conn) { 2900 log_info("Flush occurred, disconnect 0x%04x", handle); 2901 conn->state = SEND_DISCONNECT; 2902 } 2903 break; 2904 2905 case HCI_EVENT_INQUIRY_COMPLETE: 2906 if (hci_stack->inquiry_state == GAP_INQUIRY_STATE_ACTIVE){ 2907 hci_stack->inquiry_state = GAP_INQUIRY_STATE_IDLE; 2908 uint8_t event[] = { GAP_EVENT_INQUIRY_COMPLETE, 1, 0}; 2909 hci_emit_event(event, sizeof(event), 1); 2910 } 2911 break; 2912 case HCI_EVENT_REMOTE_NAME_REQUEST_COMPLETE: 2913 if (hci_stack->remote_name_state == GAP_REMOTE_NAME_STATE_W4_COMPLETE){ 2914 hci_stack->remote_name_state = GAP_REMOTE_NAME_STATE_IDLE; 2915 } 2916 break; 2917 case HCI_EVENT_CONNECTION_REQUEST: 2918 reverse_bd_addr(&packet[2], addr); 2919 link_type = (hci_link_type_t) packet[11]; 2920 2921 // CVE-2020-26555: reject incoming connection from device with same BD ADDR 2922 if (memcmp(hci_stack->local_bd_addr, addr, 6) == 0){ 2923 hci_stack->decline_reason = ERROR_CODE_CONNECTION_REJECTED_DUE_TO_UNACCEPTABLE_BD_ADDR; 2924 bd_addr_copy(hci_stack->decline_addr, addr); 2925 break; 2926 } 2927 2928 if (hci_stack->gap_classic_accept_callback != NULL){ 2929 if ((*hci_stack->gap_classic_accept_callback)(addr, link_type) == 0){ 2930 hci_stack->decline_reason = ERROR_CODE_CONNECTION_REJECTED_DUE_TO_UNACCEPTABLE_BD_ADDR; 2931 bd_addr_copy(hci_stack->decline_addr, addr); 2932 break; 2933 } 2934 } 2935 2936 // TODO: eval COD 8-10 2937 log_info("Connection_incoming: %s, type %u", bd_addr_to_str(addr), (unsigned int) link_type); 2938 addr_type = (link_type == HCI_LINK_TYPE_ACL) ? BD_ADDR_TYPE_ACL : BD_ADDR_TYPE_SCO; 2939 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 2940 if (!conn) { 2941 conn = create_connection_for_bd_addr_and_type(addr, addr_type); 2942 } 2943 if (!conn) { 2944 // CONNECTION REJECTED DUE TO LIMITED RESOURCES (0X0D) 2945 hci_stack->decline_reason = ERROR_CODE_CONNECTION_REJECTED_DUE_TO_LIMITED_RESOURCES; 2946 bd_addr_copy(hci_stack->decline_addr, addr); 2947 hci_run(); 2948 // avoid event to higher layer 2949 return; 2950 } 2951 conn->role = HCI_ROLE_SLAVE; 2952 conn->state = RECEIVED_CONNECTION_REQUEST; 2953 // store info about eSCO 2954 if (link_type == HCI_LINK_TYPE_ESCO){ 2955 conn->remote_supported_features[0] |= 1; 2956 } 2957 hci_run(); 2958 break; 2959 2960 case HCI_EVENT_CONNECTION_COMPLETE: 2961 // Connection management 2962 reverse_bd_addr(&packet[5], addr); 2963 log_info("Connection_complete (status=%u) %s", packet[2], bd_addr_to_str(addr)); 2964 addr_type = BD_ADDR_TYPE_ACL; 2965 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 2966 if (conn) { 2967 if (!packet[2]){ 2968 conn->state = OPEN; 2969 conn->con_handle = little_endian_read_16(packet, 3); 2970 2971 // trigger write supervision timeout if we're master 2972 if ((hci_stack->link_supervision_timeout != HCI_LINK_SUPERVISION_TIMEOUT_DEFAULT) && (conn->role == HCI_ROLE_MASTER)){ 2973 conn->gap_connection_tasks |= GAP_CONNECTION_TASK_WRITE_SUPERVISION_TIMEOUT; 2974 } 2975 2976 // trigger write automatic flush timeout 2977 if (hci_stack->automatic_flush_timeout != 0){ 2978 conn->gap_connection_tasks |= GAP_CONNECTION_TASK_WRITE_AUTOMATIC_FLUSH_TIMEOUT; 2979 } 2980 2981 // restart timer 2982 btstack_run_loop_set_timer(&conn->timeout, HCI_CONNECTION_TIMEOUT_MS); 2983 btstack_run_loop_add_timer(&conn->timeout); 2984 2985 // trigger remote features for dedicated bonding 2986 if ((conn->bonding_flags & BONDING_DEDICATED) != 0){ 2987 hci_trigger_remote_features_for_connection(conn); 2988 } 2989 2990 log_info("New connection: handle %u, %s", conn->con_handle, bd_addr_to_str(conn->address)); 2991 2992 hci_emit_nr_connections_changed(); 2993 } else { 2994 // connection failed 2995 hci_handle_connection_failed(conn, packet[2]); 2996 } 2997 } 2998 break; 2999 3000 case HCI_EVENT_SYNCHRONOUS_CONNECTION_COMPLETE: 3001 reverse_bd_addr(&packet[5], addr); 3002 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_SCO); 3003 log_info("Synchronous Connection Complete for %p (status=%u) %s", conn, packet[2], bd_addr_to_str(addr)); 3004 if (packet[2]){ 3005 // connection failed 3006 if (conn){ 3007 hci_handle_connection_failed(conn, packet[2]); 3008 } 3009 break; 3010 } 3011 if (!conn) { 3012 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_SCO); 3013 } 3014 if (!conn) { 3015 break; 3016 } 3017 conn->state = OPEN; 3018 conn->con_handle = little_endian_read_16(packet, 3); 3019 3020 #ifdef ENABLE_SCO_OVER_HCI 3021 // update SCO 3022 if (conn->address_type == BD_ADDR_TYPE_SCO && hci_stack->hci_transport && hci_stack->hci_transport->set_sco_config){ 3023 hci_stack->hci_transport->set_sco_config(hci_stack->sco_voice_setting_active, hci_number_sco_connections()); 3024 } 3025 // trigger can send now 3026 if (hci_have_usb_transport()){ 3027 hci_stack->sco_can_send_now = true; 3028 } 3029 #endif 3030 #ifdef HAVE_SCO_TRANSPORT 3031 // configure sco transport 3032 if (hci_stack->sco_transport != NULL){ 3033 sco_format_t sco_format = ((hci_stack->sco_voice_setting_active & 0x03) == 0x03) ? SCO_FORMAT_8_BIT : SCO_FORMAT_16_BIT; 3034 hci_stack->sco_transport->open(conn->con_handle, sco_format); 3035 } 3036 #endif 3037 break; 3038 3039 case HCI_EVENT_READ_REMOTE_SUPPORTED_FEATURES_COMPLETE: 3040 handle = little_endian_read_16(packet, 3); 3041 conn = hci_connection_for_handle(handle); 3042 if (!conn) break; 3043 if (!packet[2]){ 3044 const uint8_t * features = &packet[5]; 3045 hci_handle_remote_features_page_0(conn, features); 3046 3047 // read extended features if possible 3048 if (hci_command_supported(SUPPORTED_HCI_COMMAND_READ_REMOTE_EXTENDED_FEATURES) 3049 && ((conn->remote_supported_features[0] & 2) != 0)) { 3050 conn->bonding_flags |= BONDING_REQUEST_REMOTE_FEATURES_PAGE_1; 3051 break; 3052 } 3053 } 3054 hci_handle_remote_features_received(conn); 3055 break; 3056 3057 case HCI_EVENT_READ_REMOTE_EXTENDED_FEATURES_COMPLETE: 3058 handle = little_endian_read_16(packet, 3); 3059 conn = hci_connection_for_handle(handle); 3060 if (!conn) break; 3061 // status = ok, page = 1 3062 if (!packet[2]) { 3063 uint8_t page_number = packet[5]; 3064 uint8_t maximum_page_number = packet[6]; 3065 const uint8_t * features = &packet[7]; 3066 bool done = false; 3067 switch (page_number){ 3068 case 1: 3069 hci_handle_remote_features_page_1(conn, features); 3070 if (maximum_page_number >= 2){ 3071 // get Secure Connections (Controller) from Page 2 if available 3072 conn->bonding_flags |= BONDING_REQUEST_REMOTE_FEATURES_PAGE_2; 3073 } else { 3074 // otherwise, assume SC (Controller) == SC (Host) 3075 if ((conn->bonding_flags & BONDING_REMOTE_SUPPORTS_SC_HOST) != 0){ 3076 conn->bonding_flags |= BONDING_REMOTE_SUPPORTS_SC_CONTROLLER; 3077 } 3078 done = true; 3079 } 3080 break; 3081 case 2: 3082 hci_handle_remote_features_page_2(conn, features); 3083 done = true; 3084 break; 3085 default: 3086 break; 3087 } 3088 if (!done) break; 3089 } 3090 hci_handle_remote_features_received(conn); 3091 break; 3092 3093 case HCI_EVENT_LINK_KEY_REQUEST: 3094 #ifndef ENABLE_EXPLICIT_LINK_KEY_REPLY 3095 hci_event_link_key_request_get_bd_addr(packet, addr); 3096 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 3097 if (!conn) break; 3098 3099 // lookup link key in db if not cached 3100 if ((conn->link_key_type == INVALID_LINK_KEY) && (hci_stack->link_key_db != NULL)){ 3101 hci_stack->link_key_db->get_link_key(conn->address, conn->link_key, &conn->link_key_type); 3102 } 3103 3104 // response sent by hci_run() 3105 conn->authentication_flags |= AUTH_FLAG_HANDLE_LINK_KEY_REQUEST; 3106 #endif 3107 break; 3108 3109 case HCI_EVENT_LINK_KEY_NOTIFICATION: { 3110 hci_event_link_key_request_get_bd_addr(packet, addr); 3111 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 3112 if (!conn) break; 3113 3114 hci_pairing_complete(conn, ERROR_CODE_SUCCESS); 3115 3116 // CVE-2020-26555: ignore NULL link key 3117 // default link_key_type = INVALID_LINK_KEY asserts that NULL key won't be used for encryption 3118 if (btstack_is_null(&packet[8], 16)) break; 3119 3120 link_key_type_t link_key_type = (link_key_type_t)packet[24]; 3121 // Change Connection Encryption keeps link key type 3122 if (link_key_type != CHANGED_COMBINATION_KEY){ 3123 conn->link_key_type = link_key_type; 3124 } 3125 3126 // cache link key. link keys stored in little-endian format for legacy reasons 3127 memcpy(&conn->link_key, &packet[8], 16); 3128 3129 // only store link key: 3130 // - if bondable enabled 3131 if (hci_stack->bondable == false) break; 3132 // - if security level sufficient 3133 if (gap_security_level_for_link_key_type(link_key_type) < conn->requested_security_level) break; 3134 // - for SSP, also check if remote side requested bonding as well 3135 if (conn->link_key_type != COMBINATION_KEY){ 3136 bool remote_bonding = conn->io_cap_response_auth_req >= SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_DEDICATED_BONDING; 3137 if (!remote_bonding){ 3138 break; 3139 } 3140 } 3141 gap_store_link_key_for_bd_addr(addr, &packet[8], conn->link_key_type); 3142 break; 3143 } 3144 3145 case HCI_EVENT_PIN_CODE_REQUEST: 3146 hci_event_pin_code_request_get_bd_addr(packet, addr); 3147 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 3148 if (!conn) break; 3149 3150 hci_pairing_started(conn, false); 3151 // abort pairing if: non-bondable mode (pin code request is not forwarded to app) 3152 if (!hci_stack->bondable ){ 3153 conn->authentication_flags |= AUTH_FLAG_DENY_PIN_CODE_REQUEST; 3154 hci_pairing_complete(conn, ERROR_CODE_PAIRING_NOT_ALLOWED); 3155 hci_run(); 3156 return; 3157 } 3158 // abort pairing if: LEVEL_4 required (pin code request is not forwarded to app) 3159 if ((hci_stack->gap_secure_connections_only_mode) || (conn->requested_security_level == LEVEL_4)){ 3160 log_info("Level 4 required, but SC not supported -> abort"); 3161 conn->authentication_flags |= AUTH_FLAG_DENY_PIN_CODE_REQUEST; 3162 hci_pairing_complete(conn, ERROR_CODE_INSUFFICIENT_SECURITY); 3163 hci_run(); 3164 return; 3165 } 3166 break; 3167 3168 case HCI_EVENT_IO_CAPABILITY_RESPONSE: 3169 hci_event_io_capability_response_get_bd_addr(packet, addr); 3170 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 3171 if (!conn) break; 3172 3173 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], AUTH_FLAG_RECV_IO_CAPABILITIES_RESPONSE); 3174 hci_pairing_started(conn, true); 3175 conn->io_cap_response_auth_req = hci_event_io_capability_response_get_authentication_requirements(packet); 3176 conn->io_cap_response_io = hci_event_io_capability_response_get_io_capability(packet); 3177 #ifdef ENABLE_CLASSIC_PAIRING_OOB 3178 conn->io_cap_response_oob_data = hci_event_io_capability_response_get_oob_data_present(packet); 3179 #endif 3180 break; 3181 3182 case HCI_EVENT_IO_CAPABILITY_REQUEST: 3183 hci_event_io_capability_response_get_bd_addr(packet, addr); 3184 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 3185 if (!conn) break; 3186 3187 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], AUTH_FLAG_RECV_IO_CAPABILITIES_REQUEST); 3188 hci_connection_timestamp(conn); 3189 hci_pairing_started(conn, true); 3190 break; 3191 3192 #ifdef ENABLE_CLASSIC_PAIRING_OOB 3193 case HCI_EVENT_REMOTE_OOB_DATA_REQUEST: 3194 hci_event_remote_oob_data_request_get_bd_addr(packet, addr); 3195 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 3196 if (!conn) break; 3197 3198 hci_connection_timestamp(conn); 3199 3200 hci_pairing_started(conn, true); 3201 3202 connectionSetAuthenticationFlags(conn, AUTH_FLAG_SEND_REMOTE_OOB_DATA_REPLY); 3203 break; 3204 #endif 3205 3206 case HCI_EVENT_USER_CONFIRMATION_REQUEST: 3207 hci_event_user_confirmation_request_get_bd_addr(packet, addr); 3208 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 3209 if (!conn) break; 3210 if (hci_ssp_security_level_possible_for_io_cap(conn->requested_security_level, hci_stack->ssp_io_capability, conn->io_cap_response_io)) { 3211 if (hci_stack->ssp_auto_accept){ 3212 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], AUTH_FLAG_SEND_USER_CONFIRM_REPLY); 3213 }; 3214 } else { 3215 hci_pairing_complete(conn, ERROR_CODE_INSUFFICIENT_SECURITY); 3216 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], AUTH_FLAG_SEND_USER_CONFIRM_NEGATIVE_REPLY); 3217 // don't forward event to app 3218 hci_run(); 3219 return; 3220 } 3221 break; 3222 3223 case HCI_EVENT_USER_PASSKEY_REQUEST: 3224 // Pairing using Passkey results in MITM protection. If Level 4 is required, support for SC is validated on IO Cap Request 3225 if (hci_stack->ssp_auto_accept){ 3226 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], AUTH_FLAG_SEND_USER_PASSKEY_REPLY); 3227 }; 3228 break; 3229 3230 case HCI_EVENT_MODE_CHANGE: 3231 handle = hci_event_mode_change_get_handle(packet); 3232 conn = hci_connection_for_handle(handle); 3233 if (!conn) break; 3234 conn->connection_mode = hci_event_mode_change_get_mode(packet); 3235 log_info("HCI_EVENT_MODE_CHANGE, handle 0x%04x, mode %u", handle, conn->connection_mode); 3236 break; 3237 #endif 3238 3239 case HCI_EVENT_ENCRYPTION_CHANGE: 3240 handle = hci_event_encryption_change_get_connection_handle(packet); 3241 conn = hci_connection_for_handle(handle); 3242 if (!conn) break; 3243 if (hci_event_encryption_change_get_status(packet) == 0u) { 3244 uint8_t encryption_enabled = hci_event_encryption_change_get_encryption_enabled(packet); 3245 if (encryption_enabled){ 3246 if (hci_is_le_connection(conn)){ 3247 // For LE, we accept connection as encrypted 3248 conn->authentication_flags |= AUTH_FLAG_CONNECTION_ENCRYPTED; 3249 } 3250 #ifdef ENABLE_CLASSIC 3251 else { 3252 3253 // dedicated bonding: send result and disconnect 3254 if (conn->bonding_flags & BONDING_DEDICATED){ 3255 conn->bonding_flags &= ~BONDING_DEDICATED; 3256 conn->bonding_flags |= BONDING_DISCONNECT_DEDICATED_DONE; 3257 conn->bonding_status = packet[2]; 3258 break; 3259 } 3260 3261 // Detect Secure Connection -> Legacy Connection Downgrade Attack (BIAS) 3262 bool sc_used_during_pairing = gap_secure_connection_for_link_key_type(conn->link_key_type); 3263 bool connected_uses_aes_ccm = encryption_enabled == 2; 3264 if (hci_stack->secure_connections_active && sc_used_during_pairing && !connected_uses_aes_ccm){ 3265 log_info("SC during pairing, but only E0 now -> abort"); 3266 conn->bonding_flags |= BONDING_DISCONNECT_SECURITY_BLOCK; 3267 break; 3268 } 3269 3270 // if AES-CCM is used, authentication used SC -> authentication was mutual and we can skip explicit authentication 3271 if (connected_uses_aes_ccm){ 3272 conn->authentication_flags |= AUTH_FLAG_CONNECTION_AUTHENTICATED; 3273 } 3274 3275 #ifdef ENABLE_TESTING_SUPPORT 3276 // work around for issue with PTS dongle 3277 conn->authentication_flags |= AUTH_FLAG_CONNECTION_AUTHENTICATED; 3278 #endif 3279 if (hci_command_supported(SUPPORTED_HCI_COMMAND_READ_ENCRYPTION_KEY_SIZE)){ 3280 // For Classic, we need to validate encryption key size first, if possible (== supported by Controller) 3281 conn->bonding_flags |= BONDING_SEND_READ_ENCRYPTION_KEY_SIZE; 3282 } else { 3283 // if not, pretend everything is perfect 3284 hci_handle_read_encryption_key_size_complete(conn, 16); 3285 } 3286 } 3287 #endif 3288 } else { 3289 conn->authentication_flags &= ~AUTH_FLAG_CONNECTION_ENCRYPTED; 3290 } 3291 } 3292 3293 break; 3294 3295 #ifdef ENABLE_CLASSIC 3296 case HCI_EVENT_AUTHENTICATION_COMPLETE_EVENT: 3297 handle = hci_event_authentication_complete_get_connection_handle(packet); 3298 conn = hci_connection_for_handle(handle); 3299 if (!conn) break; 3300 3301 // clear authentication active flag 3302 conn->bonding_flags &= ~BONDING_SENT_AUTHENTICATE_REQUEST; 3303 hci_pairing_complete(conn, hci_event_authentication_complete_get_status(packet)); 3304 3305 // authenticated only if auth status == 0 3306 if (hci_event_authentication_complete_get_status(packet) == 0){ 3307 // authenticated 3308 conn->authentication_flags |= AUTH_FLAG_CONNECTION_AUTHENTICATED; 3309 3310 // If not already encrypted, start encryption 3311 if ((conn->authentication_flags & AUTH_FLAG_CONNECTION_ENCRYPTED) == 0){ 3312 conn->bonding_flags |= BONDING_SEND_ENCRYPTION_REQUEST; 3313 break; 3314 } 3315 } 3316 3317 // emit updated security level 3318 hci_emit_security_level(handle, gap_security_level_for_connection(conn)); 3319 break; 3320 3321 case HCI_EVENT_SIMPLE_PAIRING_COMPLETE: 3322 hci_event_simple_pairing_complete_get_bd_addr(packet, addr); 3323 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 3324 if (!conn) break; 3325 3326 // treat successfully paired connection as authenticated 3327 if (hci_event_simple_pairing_complete_get_status(packet) == ERROR_CODE_SUCCESS){ 3328 conn->authentication_flags |= AUTH_FLAG_CONNECTION_AUTHENTICATED; 3329 } 3330 3331 hci_pairing_complete(conn, hci_event_simple_pairing_complete_get_status(packet)); 3332 break; 3333 #endif 3334 3335 // HCI_EVENT_DISCONNECTION_COMPLETE 3336 // has been split, to first notify stack before shutting connection down 3337 // see end of function, too. 3338 case HCI_EVENT_DISCONNECTION_COMPLETE: 3339 if (packet[2]) break; // status != 0 3340 handle = little_endian_read_16(packet, 3); 3341 // drop outgoing ACL fragments if it is for closed connection and release buffer if tx not active 3342 if (hci_stack->acl_fragmentation_total_size > 0u) { 3343 if (handle == READ_ACL_CONNECTION_HANDLE(hci_stack->hci_packet_buffer)){ 3344 int release_buffer = hci_stack->acl_fragmentation_tx_active == 0u; 3345 log_info("drop fragmented ACL data for closed connection, release buffer %u", release_buffer); 3346 hci_stack->acl_fragmentation_total_size = 0; 3347 hci_stack->acl_fragmentation_pos = 0; 3348 if (release_buffer){ 3349 hci_release_packet_buffer(); 3350 } 3351 } 3352 } 3353 3354 conn = hci_connection_for_handle(handle); 3355 if (!conn) break; 3356 #ifdef ENABLE_CLASSIC 3357 // pairing failed if it was ongoing 3358 hci_pairing_complete(conn, ERROR_CODE_REMOTE_USER_TERMINATED_CONNECTION); 3359 #endif 3360 3361 // emit dedicatd bonding event 3362 if (conn->bonding_flags & BONDING_EMIT_COMPLETE_ON_DISCONNECT){ 3363 hci_emit_dedicated_bonding_result(conn->address, conn->bonding_status); 3364 } 3365 3366 // mark connection for shutdown, stop timers, reset state 3367 conn->state = RECEIVED_DISCONNECTION_COMPLETE; 3368 hci_connection_stop_timer(conn); 3369 hci_connection_init(conn); 3370 3371 #ifdef ENABLE_BLE 3372 #ifdef ENABLE_LE_PERIPHERAL 3373 // re-enable advertisements for le connections if active 3374 if (hci_is_le_connection(conn)){ 3375 hci_update_advertisements_enabled_for_current_roles(); 3376 } 3377 #endif 3378 #endif 3379 break; 3380 3381 case HCI_EVENT_HARDWARE_ERROR: 3382 log_error("Hardware Error: 0x%02x", packet[2]); 3383 if (hci_stack->hardware_error_callback){ 3384 (*hci_stack->hardware_error_callback)(packet[2]); 3385 } else { 3386 // if no special requests, just reboot stack 3387 hci_power_control_off(); 3388 hci_power_control_on(); 3389 } 3390 break; 3391 3392 #ifdef ENABLE_CLASSIC 3393 case HCI_EVENT_ROLE_CHANGE: 3394 if (packet[2]) break; // status != 0 3395 reverse_bd_addr(&packet[3], addr); 3396 addr_type = BD_ADDR_TYPE_ACL; 3397 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 3398 if (!conn) break; 3399 conn->role = packet[9]; 3400 break; 3401 #endif 3402 3403 case HCI_EVENT_TRANSPORT_PACKET_SENT: 3404 // release packet buffer only for asynchronous transport and if there are not further fragements 3405 if (hci_transport_synchronous()) { 3406 log_error("Synchronous HCI Transport shouldn't send HCI_EVENT_TRANSPORT_PACKET_SENT"); 3407 return; // instead of break: to avoid re-entering hci_run() 3408 } 3409 hci_stack->acl_fragmentation_tx_active = 0; 3410 if (hci_stack->acl_fragmentation_total_size) break; 3411 hci_release_packet_buffer(); 3412 3413 // L2CAP receives this event via the hci_emit_event below 3414 3415 #ifdef ENABLE_CLASSIC 3416 // For SCO, we do the can_send_now_check here 3417 hci_notify_if_sco_can_send_now(); 3418 #endif 3419 break; 3420 3421 #ifdef ENABLE_CLASSIC 3422 case HCI_EVENT_SCO_CAN_SEND_NOW: 3423 // For SCO, we do the can_send_now_check here 3424 hci_stack->sco_can_send_now = true; 3425 hci_notify_if_sco_can_send_now(); 3426 return; 3427 3428 // explode inquriy results for easier consumption 3429 case HCI_EVENT_INQUIRY_RESULT: 3430 case HCI_EVENT_INQUIRY_RESULT_WITH_RSSI: 3431 case HCI_EVENT_EXTENDED_INQUIRY_RESPONSE: 3432 gap_inquiry_explode(packet, size); 3433 break; 3434 #endif 3435 3436 #ifdef ENABLE_BLE 3437 case HCI_EVENT_LE_META: 3438 switch (packet[2]){ 3439 #ifdef ENABLE_LE_CENTRAL 3440 case HCI_SUBEVENT_LE_ADVERTISING_REPORT: 3441 if (!hci_stack->le_scanning_enabled) break; 3442 le_handle_advertisement_report(packet, size); 3443 break; 3444 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 3445 case HCI_SUBEVENT_LE_EXTENDED_ADVERTISING_REPORT: 3446 if (!hci_stack->le_scanning_enabled) break; 3447 le_handle_extended_advertisement_report(packet, size); 3448 break; 3449 #endif 3450 #endif 3451 case HCI_SUBEVENT_LE_CONNECTION_COMPLETE: 3452 event_handle_le_connection_complete(packet); 3453 break; 3454 3455 // log_info("LE buffer size: %u, count %u", little_endian_read_16(packet,6), packet[8]); 3456 case HCI_SUBEVENT_LE_CONNECTION_UPDATE_COMPLETE: 3457 handle = hci_subevent_le_connection_update_complete_get_connection_handle(packet); 3458 conn = hci_connection_for_handle(handle); 3459 if (!conn) break; 3460 conn->le_connection_interval = hci_subevent_le_connection_update_complete_get_conn_interval(packet); 3461 break; 3462 3463 case HCI_SUBEVENT_LE_REMOTE_CONNECTION_PARAMETER_REQUEST: 3464 // connection 3465 handle = hci_subevent_le_remote_connection_parameter_request_get_connection_handle(packet); 3466 conn = hci_connection_for_handle(handle); 3467 if (conn) { 3468 // read arguments 3469 uint16_t le_conn_interval_min = hci_subevent_le_remote_connection_parameter_request_get_interval_min(packet); 3470 uint16_t le_conn_interval_max = hci_subevent_le_remote_connection_parameter_request_get_interval_max(packet); 3471 uint16_t le_conn_latency = hci_subevent_le_remote_connection_parameter_request_get_latency(packet); 3472 uint16_t le_supervision_timeout = hci_subevent_le_remote_connection_parameter_request_get_timeout(packet); 3473 3474 // validate against current connection parameter range 3475 le_connection_parameter_range_t existing_range; 3476 gap_get_connection_parameter_range(&existing_range); 3477 int update_parameter = gap_connection_parameter_range_included(&existing_range, le_conn_interval_min, le_conn_interval_max, le_conn_latency, le_supervision_timeout); 3478 if (update_parameter){ 3479 conn->le_con_parameter_update_state = CON_PARAMETER_UPDATE_REPLY; 3480 conn->le_conn_interval_min = le_conn_interval_min; 3481 conn->le_conn_interval_max = le_conn_interval_max; 3482 conn->le_conn_latency = le_conn_latency; 3483 conn->le_supervision_timeout = le_supervision_timeout; 3484 } else { 3485 conn->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NEGATIVE_REPLY; 3486 } 3487 } 3488 break; 3489 #ifdef ENABLE_LE_LIMIT_ACL_FRAGMENT_BY_MAX_OCTETS 3490 case HCI_SUBEVENT_LE_DATA_LENGTH_CHANGE: 3491 handle = hci_subevent_le_data_length_change_get_connection_handle(packet); 3492 conn = hci_connection_for_handle(handle); 3493 if (conn) { 3494 conn->le_max_tx_octets = hci_subevent_le_data_length_change_get_max_tx_octets(packet); 3495 } 3496 break; 3497 #endif 3498 default: 3499 break; 3500 } 3501 break; 3502 #endif 3503 case HCI_EVENT_VENDOR_SPECIFIC: 3504 // Vendor specific commands often create vendor specific event instead of num completed packets 3505 // To avoid getting stuck as num_cmds_packets is zero, reset it to 1 for controllers with this behaviour 3506 switch (hci_stack->manufacturer){ 3507 case BLUETOOTH_COMPANY_ID_CAMBRIDGE_SILICON_RADIO: 3508 hci_stack->num_cmd_packets = 1; 3509 break; 3510 default: 3511 break; 3512 } 3513 break; 3514 default: 3515 break; 3516 } 3517 3518 handle_event_for_current_stack_state(packet, size); 3519 3520 // notify upper stack 3521 hci_emit_event(packet, size, 0); // don't dump, already happened in packet handler 3522 3523 // moved here to give upper stack a chance to close down everything with hci_connection_t intact 3524 if ((hci_event_packet_get_type(packet) == HCI_EVENT_DISCONNECTION_COMPLETE) && (packet[2] == 0)){ 3525 handle = little_endian_read_16(packet, 3); 3526 hci_connection_t * aConn = hci_connection_for_handle(handle); 3527 // discard connection if app did not trigger a reconnect in the event handler 3528 if (aConn && aConn->state == RECEIVED_DISCONNECTION_COMPLETE){ 3529 hci_shutdown_connection(aConn); 3530 } 3531 } 3532 3533 // execute main loop 3534 hci_run(); 3535 } 3536 3537 #ifdef ENABLE_CLASSIC 3538 3539 #ifdef ENABLE_SCO_OVER_HCI 3540 static void sco_tx_timeout_handler(btstack_timer_source_t * ts); 3541 static void sco_schedule_tx(hci_connection_t * conn); 3542 3543 static void sco_tx_timeout_handler(btstack_timer_source_t * ts){ 3544 log_debug("SCO TX Timeout"); 3545 hci_con_handle_t con_handle = (hci_con_handle_t) (uintptr_t) btstack_run_loop_get_timer_context(ts); 3546 hci_connection_t * conn = hci_connection_for_handle(con_handle); 3547 if (!conn) return; 3548 3549 // trigger send 3550 conn->sco_tx_ready = 1; 3551 // extra packet if CVSD but SCO buffer is too short 3552 if (((hci_stack->sco_voice_setting_active & 0x03) != 0x03) && (hci_stack->sco_data_packet_length < 123)){ 3553 conn->sco_tx_ready++; 3554 } 3555 hci_notify_if_sco_can_send_now(); 3556 } 3557 3558 3559 #define SCO_TX_AFTER_RX_MS (6) 3560 3561 static void sco_schedule_tx(hci_connection_t * conn){ 3562 3563 uint32_t now = btstack_run_loop_get_time_ms(); 3564 uint32_t sco_tx_ms = conn->sco_rx_ms + SCO_TX_AFTER_RX_MS; 3565 int time_delta_ms = sco_tx_ms - now; 3566 3567 btstack_timer_source_t * timer = (conn->sco_rx_count & 1) ? &conn->timeout : &conn->timeout_sco; 3568 3569 // log_error("SCO TX at %u in %u", (int) sco_tx_ms, time_delta_ms); 3570 btstack_run_loop_remove_timer(timer); 3571 btstack_run_loop_set_timer(timer, time_delta_ms); 3572 btstack_run_loop_set_timer_context(timer, (void *) (uintptr_t) conn->con_handle); 3573 btstack_run_loop_set_timer_handler(timer, &sco_tx_timeout_handler); 3574 btstack_run_loop_add_timer(timer); 3575 } 3576 #endif 3577 3578 static void sco_handler(uint8_t * packet, uint16_t size){ 3579 // lookup connection struct 3580 hci_con_handle_t con_handle = READ_SCO_CONNECTION_HANDLE(packet); 3581 hci_connection_t * conn = hci_connection_for_handle(con_handle); 3582 if (!conn) return; 3583 3584 #ifdef ENABLE_SCO_OVER_HCI 3585 // CSR 8811 prefixes 60 byte SCO packet in transparent mode with 20 zero bytes -> skip first 20 payload bytes 3586 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_CAMBRIDGE_SILICON_RADIO){ 3587 if ((size == 83) && ((hci_stack->sco_voice_setting_active & 0x03) == 0x03)){ 3588 packet[2] = 0x3c; 3589 memmove(&packet[3], &packet[23], 63); 3590 size = 63; 3591 } 3592 } 3593 3594 if (hci_have_usb_transport()){ 3595 // Nothing to do 3596 } else { 3597 // 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); 3598 if (hci_stack->synchronous_flow_control_enabled == 0){ 3599 uint32_t now = btstack_run_loop_get_time_ms(); 3600 3601 if (!conn->sco_rx_valid){ 3602 // ignore first 10 packets 3603 conn->sco_rx_count++; 3604 // log_debug("sco rx count %u", conn->sco_rx_count); 3605 if (conn->sco_rx_count == 10) { 3606 // use first timestamp as is and pretent it just started 3607 conn->sco_rx_ms = now; 3608 conn->sco_rx_valid = 1; 3609 conn->sco_rx_count = 0; 3610 sco_schedule_tx(conn); 3611 } 3612 } else { 3613 // track expected arrival timme 3614 conn->sco_rx_count++; 3615 conn->sco_rx_ms += 7; 3616 int delta = (int32_t) (now - conn->sco_rx_ms); 3617 if (delta > 0){ 3618 conn->sco_rx_ms++; 3619 } 3620 // log_debug("sco rx %u", conn->sco_rx_ms); 3621 sco_schedule_tx(conn); 3622 } 3623 } 3624 } 3625 #endif 3626 3627 // deliver to app 3628 if (hci_stack->sco_packet_handler) { 3629 hci_stack->sco_packet_handler(HCI_SCO_DATA_PACKET, 0, packet, size); 3630 } 3631 3632 #ifdef HAVE_SCO_TRANSPORT 3633 // We can send one packet for each received packet 3634 conn->sco_tx_ready++; 3635 hci_notify_if_sco_can_send_now(); 3636 #endif 3637 3638 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 3639 conn->num_packets_completed++; 3640 hci_stack->host_completed_packets = 1; 3641 hci_run(); 3642 #endif 3643 } 3644 #endif 3645 3646 static void packet_handler(uint8_t packet_type, uint8_t *packet, uint16_t size){ 3647 hci_dump_packet(packet_type, 1, packet, size); 3648 switch (packet_type) { 3649 case HCI_EVENT_PACKET: 3650 event_handler(packet, size); 3651 break; 3652 case HCI_ACL_DATA_PACKET: 3653 acl_handler(packet, size); 3654 break; 3655 #ifdef ENABLE_CLASSIC 3656 case HCI_SCO_DATA_PACKET: 3657 sco_handler(packet, size); 3658 break; 3659 #endif 3660 default: 3661 break; 3662 } 3663 } 3664 3665 /** 3666 * @brief Add event packet handler. 3667 */ 3668 void hci_add_event_handler(btstack_packet_callback_registration_t * callback_handler){ 3669 btstack_linked_list_add_tail(&hci_stack->event_handlers, (btstack_linked_item_t*) callback_handler); 3670 } 3671 3672 /** 3673 * @brief Remove event packet handler. 3674 */ 3675 void hci_remove_event_handler(btstack_packet_callback_registration_t * callback_handler){ 3676 btstack_linked_list_remove(&hci_stack->event_handlers, (btstack_linked_item_t*) callback_handler); 3677 } 3678 3679 /** Register HCI packet handlers */ 3680 void hci_register_acl_packet_handler(btstack_packet_handler_t handler){ 3681 hci_stack->acl_packet_handler = handler; 3682 } 3683 3684 #ifdef ENABLE_CLASSIC 3685 /** 3686 * @brief Registers a packet handler for SCO data. Used for HSP and HFP profiles. 3687 */ 3688 void hci_register_sco_packet_handler(btstack_packet_handler_t handler){ 3689 hci_stack->sco_packet_handler = handler; 3690 } 3691 #endif 3692 3693 static void hci_state_reset(void){ 3694 // no connections yet 3695 hci_stack->connections = NULL; 3696 3697 // keep discoverable/connectable as this has been requested by the client(s) 3698 // hci_stack->discoverable = 0; 3699 // hci_stack->connectable = 0; 3700 // hci_stack->bondable = 1; 3701 // hci_stack->own_addr_type = 0; 3702 3703 // buffer is free 3704 hci_stack->hci_packet_buffer_reserved = false; 3705 3706 // no pending cmds 3707 hci_stack->decline_reason = 0; 3708 3709 hci_stack->secure_connections_active = false; 3710 3711 #ifdef ENABLE_CLASSIC 3712 hci_stack->inquiry_lap = GAP_IAC_GENERAL_INQUIRY; 3713 hci_stack->page_timeout = 0x6000; // ca. 15 sec 3714 3715 hci_stack->gap_tasks_classic = 3716 GAP_TASK_SET_DEFAULT_LINK_POLICY | 3717 GAP_TASK_SET_CLASS_OF_DEVICE | 3718 GAP_TASK_SET_LOCAL_NAME | 3719 GAP_TASK_SET_EIR_DATA | 3720 GAP_TASK_WRITE_SCAN_ENABLE | 3721 GAP_TASK_WRITE_PAGE_TIMEOUT; 3722 #endif 3723 3724 #ifdef ENABLE_CLASSIC_PAIRING_OOB 3725 hci_stack->classic_read_local_oob_data = false; 3726 hci_stack->classic_oob_con_handle = HCI_CON_HANDLE_INVALID; 3727 #endif 3728 3729 // LE 3730 #ifdef ENABLE_BLE 3731 memset(hci_stack->le_random_address, 0, 6); 3732 hci_stack->le_random_address_set = 0; 3733 #endif 3734 #ifdef ENABLE_LE_CENTRAL 3735 hci_stack->le_scanning_active = false; 3736 hci_stack->le_scanning_param_update = true; 3737 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 3738 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 3739 hci_stack->le_whitelist_capacity = 0; 3740 #endif 3741 #ifdef ENABLE_LE_PERIPHERAL 3742 hci_stack->le_advertisements_state &= ~LE_ADVERTISEMENT_STATE_ACTIVE; 3743 if ((hci_stack->le_advertisements_state & LE_ADVERTISEMENT_STATE_PARAMS_SET) != 0){ 3744 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_PARAMS; 3745 } 3746 if (hci_stack->le_advertisements_data != NULL){ 3747 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_ADV_DATA; 3748 } 3749 #endif 3750 } 3751 3752 #ifdef ENABLE_CLASSIC 3753 /** 3754 * @brief Configure Bluetooth hardware control. Has to be called before power on. 3755 */ 3756 void hci_set_link_key_db(btstack_link_key_db_t const * link_key_db){ 3757 // store and open remote device db 3758 hci_stack->link_key_db = link_key_db; 3759 if (hci_stack->link_key_db) { 3760 hci_stack->link_key_db->open(); 3761 } 3762 } 3763 #endif 3764 3765 void hci_init(const hci_transport_t *transport, const void *config){ 3766 3767 #ifdef HAVE_MALLOC 3768 if (!hci_stack) { 3769 hci_stack = (hci_stack_t*) malloc(sizeof(hci_stack_t)); 3770 } 3771 #else 3772 hci_stack = &hci_stack_static; 3773 #endif 3774 memset(hci_stack, 0, sizeof(hci_stack_t)); 3775 3776 // reference to use transport layer implementation 3777 hci_stack->hci_transport = transport; 3778 3779 // reference to used config 3780 hci_stack->config = config; 3781 3782 // setup pointer for outgoing packet buffer 3783 hci_stack->hci_packet_buffer = &hci_stack->hci_packet_buffer_data[HCI_OUTGOING_PRE_BUFFER_SIZE]; 3784 3785 // max acl payload size defined in config.h 3786 hci_stack->acl_data_packet_length = HCI_ACL_PAYLOAD_SIZE; 3787 3788 // register packet handlers with transport 3789 transport->register_packet_handler(&packet_handler); 3790 3791 hci_stack->state = HCI_STATE_OFF; 3792 3793 // class of device 3794 hci_stack->class_of_device = 0x007a020c; // Smartphone 3795 3796 // bondable by default 3797 hci_stack->bondable = 1; 3798 3799 #ifdef ENABLE_CLASSIC 3800 // classic name 3801 hci_stack->local_name = default_classic_name; 3802 3803 // Master slave policy 3804 hci_stack->master_slave_policy = 1; 3805 3806 // Allow Role Switch 3807 hci_stack->allow_role_switch = 1; 3808 3809 // Default / minimum security level = 2 3810 hci_stack->gap_security_level = LEVEL_2; 3811 3812 // Default Security Mode 4 3813 hci_stack->gap_security_mode = GAP_SECURITY_MODE_4; 3814 3815 // Errata-11838 mandates 7 bytes for GAP Security Level 1-3 3816 hci_stack->gap_required_encyrption_key_size = 7; 3817 3818 // Link Supervision Timeout 3819 hci_stack->link_supervision_timeout = HCI_LINK_SUPERVISION_TIMEOUT_DEFAULT; 3820 3821 #endif 3822 3823 // Secure Simple Pairing default: enable, no I/O capabilities, general bonding, mitm not required, auto accept 3824 hci_stack->ssp_enable = 1; 3825 hci_stack->ssp_io_capability = SSP_IO_CAPABILITY_NO_INPUT_NO_OUTPUT; 3826 hci_stack->ssp_authentication_requirement = SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_GENERAL_BONDING; 3827 hci_stack->ssp_auto_accept = 1; 3828 3829 // Secure Connections: enable (requires support from Controller) 3830 hci_stack->secure_connections_enable = true; 3831 3832 // voice setting - signed 16 bit pcm data with CVSD over the air 3833 hci_stack->sco_voice_setting = 0x60; 3834 3835 #ifdef ENABLE_LE_CENTRAL 3836 // connection parameter to use for outgoing connections 3837 hci_stack->le_connection_scan_interval = 0x0060; // 60ms 3838 hci_stack->le_connection_scan_window = 0x0030; // 30ms 3839 hci_stack->le_connection_interval_min = 0x0008; // 10 ms 3840 hci_stack->le_connection_interval_max = 0x0018; // 30 ms 3841 hci_stack->le_connection_latency = 4; // 4 3842 hci_stack->le_supervision_timeout = 0x0048; // 720 ms 3843 hci_stack->le_minimum_ce_length = 2; // 1.25 ms 3844 hci_stack->le_maximum_ce_length = 0x0030; // 30 ms 3845 3846 // default LE Scanning 3847 hci_stack->le_scan_type = 0x1; // active 3848 hci_stack->le_scan_interval = 0x1e0; // 300 ms 3849 hci_stack->le_scan_window = 0x30; // 30 ms 3850 #endif 3851 3852 #ifdef ENABLE_LE_PERIPHERAL 3853 hci_stack->le_max_number_peripheral_connections = 1; // only single connection as peripheral 3854 #endif 3855 3856 // connection parameter range used to answer connection parameter update requests in l2cap 3857 hci_stack->le_connection_parameter_range.le_conn_interval_min = 6; 3858 hci_stack->le_connection_parameter_range.le_conn_interval_max = 3200; 3859 hci_stack->le_connection_parameter_range.le_conn_latency_min = 0; 3860 hci_stack->le_connection_parameter_range.le_conn_latency_max = 500; 3861 hci_stack->le_connection_parameter_range.le_supervision_timeout_min = 10; 3862 hci_stack->le_connection_parameter_range.le_supervision_timeout_max = 3200; 3863 3864 hci_state_reset(); 3865 } 3866 3867 void hci_deinit(void){ 3868 btstack_run_loop_remove_timer(&hci_stack->timeout); 3869 #ifdef HAVE_MALLOC 3870 if (hci_stack) { 3871 free(hci_stack); 3872 } 3873 #endif 3874 hci_stack = NULL; 3875 3876 #ifdef ENABLE_CLASSIC 3877 disable_l2cap_timeouts = 0; 3878 #endif 3879 } 3880 3881 /** 3882 * @brief Configure Bluetooth chipset driver. Has to be called before power on, or right after receiving the local version information 3883 */ 3884 void hci_set_chipset(const btstack_chipset_t *chipset_driver){ 3885 hci_stack->chipset = chipset_driver; 3886 3887 // reset chipset driver - init is also called on power_up 3888 if (hci_stack->chipset && hci_stack->chipset->init){ 3889 hci_stack->chipset->init(hci_stack->config); 3890 } 3891 } 3892 3893 /** 3894 * @brief Configure Bluetooth hardware control. Has to be called after hci_init() but before power on. 3895 */ 3896 void hci_set_control(const btstack_control_t *hardware_control){ 3897 // references to used control implementation 3898 hci_stack->control = hardware_control; 3899 // init with transport config 3900 hardware_control->init(hci_stack->config); 3901 } 3902 3903 static void hci_discard_connections(void){ 3904 btstack_linked_list_iterator_t lit; 3905 btstack_linked_list_iterator_init(&lit, &hci_stack->connections); 3906 while (btstack_linked_list_iterator_has_next(&lit)){ 3907 // cancel all l2cap connections by emitting dicsconnection complete before shutdown (free) connection 3908 hci_connection_t * connection = (hci_connection_t*) btstack_linked_list_iterator_next(&lit); 3909 hci_emit_disconnection_complete(connection->con_handle, 0x16); // terminated by local host 3910 hci_shutdown_connection(connection); 3911 } 3912 } 3913 3914 void hci_close(void){ 3915 3916 #ifdef ENABLE_CLASSIC 3917 // close remote device db 3918 if (hci_stack->link_key_db) { 3919 hci_stack->link_key_db->close(); 3920 } 3921 #endif 3922 3923 hci_discard_connections(); 3924 3925 hci_power_control(HCI_POWER_OFF); 3926 3927 #ifdef HAVE_MALLOC 3928 free(hci_stack); 3929 #endif 3930 hci_stack = NULL; 3931 } 3932 3933 #ifdef HAVE_SCO_TRANSPORT 3934 void hci_set_sco_transport(const btstack_sco_transport_t *sco_transport){ 3935 hci_stack->sco_transport = sco_transport; 3936 sco_transport->register_packet_handler(&packet_handler); 3937 } 3938 #endif 3939 3940 #ifdef ENABLE_CLASSIC 3941 void gap_set_required_encryption_key_size(uint8_t encryption_key_size){ 3942 // validate ranage and set 3943 if (encryption_key_size < 7) return; 3944 if (encryption_key_size > 16) return; 3945 hci_stack->gap_required_encyrption_key_size = encryption_key_size; 3946 } 3947 3948 uint8_t gap_set_security_mode(gap_security_mode_t security_mode){ 3949 if ((security_mode == GAP_SECURITY_MODE_4) || (security_mode == GAP_SECURITY_MODE_2)){ 3950 hci_stack->gap_security_mode = security_mode; 3951 return ERROR_CODE_SUCCESS; 3952 } else { 3953 return ERROR_CODE_UNSUPPORTED_FEATURE_OR_PARAMETER_VALUE; 3954 } 3955 } 3956 3957 gap_security_mode_t gap_get_security_mode(void){ 3958 return hci_stack->gap_security_mode; 3959 } 3960 3961 void gap_set_security_level(gap_security_level_t security_level){ 3962 hci_stack->gap_security_level = security_level; 3963 } 3964 3965 gap_security_level_t gap_get_security_level(void){ 3966 if (hci_stack->gap_secure_connections_only_mode){ 3967 return LEVEL_4; 3968 } 3969 return hci_stack->gap_security_level; 3970 } 3971 3972 void gap_set_minimal_service_security_level(gap_security_level_t security_level){ 3973 hci_stack->gap_minimal_service_security_level = security_level; 3974 } 3975 3976 void gap_set_secure_connections_only_mode(bool enable){ 3977 hci_stack->gap_secure_connections_only_mode = enable; 3978 } 3979 3980 bool gap_get_secure_connections_only_mode(void){ 3981 return hci_stack->gap_secure_connections_only_mode; 3982 } 3983 #endif 3984 3985 #ifdef ENABLE_CLASSIC 3986 void gap_set_class_of_device(uint32_t class_of_device){ 3987 hci_stack->class_of_device = class_of_device; 3988 hci_stack->gap_tasks_classic |= GAP_TASK_SET_CLASS_OF_DEVICE; 3989 hci_run(); 3990 } 3991 3992 void gap_set_default_link_policy_settings(uint16_t default_link_policy_settings){ 3993 hci_stack->default_link_policy_settings = default_link_policy_settings; 3994 hci_stack->gap_tasks_classic |= GAP_TASK_SET_DEFAULT_LINK_POLICY; 3995 hci_run(); 3996 } 3997 3998 void gap_set_allow_role_switch(bool allow_role_switch){ 3999 hci_stack->allow_role_switch = allow_role_switch ? 1 : 0; 4000 } 4001 4002 uint8_t hci_get_allow_role_switch(void){ 4003 return hci_stack->allow_role_switch; 4004 } 4005 4006 void gap_set_link_supervision_timeout(uint16_t link_supervision_timeout){ 4007 hci_stack->link_supervision_timeout = link_supervision_timeout; 4008 } 4009 4010 void gap_enable_link_watchdog(uint16_t timeout_ms){ 4011 hci_stack->automatic_flush_timeout = btstack_min(timeout_ms, 1280) * 8 / 5; // divide by 0.625 4012 } 4013 4014 uint16_t hci_automatic_flush_timeout(void){ 4015 return hci_stack->automatic_flush_timeout; 4016 } 4017 4018 void hci_disable_l2cap_timeout_check(void){ 4019 disable_l2cap_timeouts = 1; 4020 } 4021 #endif 4022 4023 #ifndef HAVE_HOST_CONTROLLER_API 4024 // Set Public BD ADDR - passed on to Bluetooth chipset if supported in bt_control_h 4025 void hci_set_bd_addr(bd_addr_t addr){ 4026 (void)memcpy(hci_stack->custom_bd_addr, addr, 6); 4027 hci_stack->custom_bd_addr_set = 1; 4028 } 4029 #endif 4030 4031 // State-Module-Driver overview 4032 // state module low-level 4033 // HCI_STATE_OFF off close 4034 // HCI_STATE_INITIALIZING, on open 4035 // HCI_STATE_WORKING, on open 4036 // HCI_STATE_HALTING, on open 4037 // HCI_STATE_SLEEPING, off/sleep close 4038 // HCI_STATE_FALLING_ASLEEP on open 4039 4040 static int hci_power_control_on(void){ 4041 4042 // power on 4043 int err = 0; 4044 if (hci_stack->control && hci_stack->control->on){ 4045 err = (*hci_stack->control->on)(); 4046 } 4047 if (err){ 4048 log_error( "POWER_ON failed"); 4049 hci_emit_hci_open_failed(); 4050 return err; 4051 } 4052 4053 // int chipset driver 4054 if (hci_stack->chipset && hci_stack->chipset->init){ 4055 hci_stack->chipset->init(hci_stack->config); 4056 } 4057 4058 // init transport 4059 if (hci_stack->hci_transport->init){ 4060 hci_stack->hci_transport->init(hci_stack->config); 4061 } 4062 4063 // open transport 4064 err = hci_stack->hci_transport->open(); 4065 if (err){ 4066 log_error( "HCI_INIT failed, turning Bluetooth off again"); 4067 if (hci_stack->control && hci_stack->control->off){ 4068 (*hci_stack->control->off)(); 4069 } 4070 hci_emit_hci_open_failed(); 4071 return err; 4072 } 4073 return 0; 4074 } 4075 4076 static void hci_power_control_off(void){ 4077 4078 log_info("hci_power_control_off"); 4079 4080 // close low-level device 4081 hci_stack->hci_transport->close(); 4082 4083 log_info("hci_power_control_off - hci_transport closed"); 4084 4085 // power off 4086 if (hci_stack->control && hci_stack->control->off){ 4087 (*hci_stack->control->off)(); 4088 } 4089 4090 log_info("hci_power_control_off - control closed"); 4091 4092 hci_stack->state = HCI_STATE_OFF; 4093 } 4094 4095 static void hci_power_control_sleep(void){ 4096 4097 log_info("hci_power_control_sleep"); 4098 4099 #if 0 4100 // don't close serial port during sleep 4101 4102 // close low-level device 4103 hci_stack->hci_transport->close(hci_stack->config); 4104 #endif 4105 4106 // sleep mode 4107 if (hci_stack->control && hci_stack->control->sleep){ 4108 (*hci_stack->control->sleep)(); 4109 } 4110 4111 hci_stack->state = HCI_STATE_SLEEPING; 4112 } 4113 4114 static int hci_power_control_wake(void){ 4115 4116 log_info("hci_power_control_wake"); 4117 4118 // wake on 4119 if (hci_stack->control && hci_stack->control->wake){ 4120 (*hci_stack->control->wake)(); 4121 } 4122 4123 #if 0 4124 // open low-level device 4125 int err = hci_stack->hci_transport->open(hci_stack->config); 4126 if (err){ 4127 log_error( "HCI_INIT failed, turning Bluetooth off again"); 4128 if (hci_stack->control && hci_stack->control->off){ 4129 (*hci_stack->control->off)(); 4130 } 4131 hci_emit_hci_open_failed(); 4132 return err; 4133 } 4134 #endif 4135 4136 return 0; 4137 } 4138 4139 static void hci_power_enter_initializing_state(void){ 4140 // set up state machine 4141 hci_stack->num_cmd_packets = 1; // assume that one cmd can be sent 4142 hci_stack->hci_packet_buffer_reserved = false; 4143 hci_stack->state = HCI_STATE_INITIALIZING; 4144 hci_stack->substate = HCI_INIT_SEND_RESET; 4145 } 4146 4147 static void hci_power_enter_halting_state(void){ 4148 #ifdef ENABLE_BLE 4149 hci_whitelist_free(); 4150 #endif 4151 // see hci_run 4152 hci_stack->state = HCI_STATE_HALTING; 4153 hci_stack->substate = HCI_HALTING_CLASSIC_STOP; 4154 // setup watchdog timer for disconnect - only triggers if Controller does not respond anymore 4155 btstack_run_loop_set_timer(&hci_stack->timeout, 1000); 4156 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_halting_timeout_handler); 4157 btstack_run_loop_add_timer(&hci_stack->timeout); 4158 } 4159 4160 // returns error 4161 static int hci_power_control_state_off(HCI_POWER_MODE power_mode){ 4162 int err; 4163 switch (power_mode){ 4164 case HCI_POWER_ON: 4165 err = hci_power_control_on(); 4166 if (err != 0) { 4167 log_error("hci_power_control_on() error %d", err); 4168 return err; 4169 } 4170 hci_power_enter_initializing_state(); 4171 break; 4172 case HCI_POWER_OFF: 4173 // do nothing 4174 break; 4175 case HCI_POWER_SLEEP: 4176 // do nothing (with SLEEP == OFF) 4177 break; 4178 default: 4179 btstack_assert(false); 4180 break; 4181 } 4182 return ERROR_CODE_SUCCESS; 4183 } 4184 4185 static int hci_power_control_state_initializing(HCI_POWER_MODE power_mode){ 4186 switch (power_mode){ 4187 case HCI_POWER_ON: 4188 // do nothing 4189 break; 4190 case HCI_POWER_OFF: 4191 // no connections yet, just turn it off 4192 hci_power_control_off(); 4193 break; 4194 case HCI_POWER_SLEEP: 4195 // no connections yet, just turn it off 4196 hci_power_control_sleep(); 4197 break; 4198 default: 4199 btstack_assert(false); 4200 break; 4201 } 4202 return ERROR_CODE_SUCCESS; 4203 } 4204 4205 static int hci_power_control_state_working(HCI_POWER_MODE power_mode) { 4206 switch (power_mode){ 4207 case HCI_POWER_ON: 4208 // do nothing 4209 break; 4210 case HCI_POWER_OFF: 4211 hci_power_enter_halting_state(); 4212 break; 4213 case HCI_POWER_SLEEP: 4214 // see hci_run 4215 hci_stack->state = HCI_STATE_FALLING_ASLEEP; 4216 hci_stack->substate = HCI_FALLING_ASLEEP_DISCONNECT; 4217 break; 4218 default: 4219 btstack_assert(false); 4220 break; 4221 } 4222 return ERROR_CODE_SUCCESS; 4223 } 4224 4225 static int hci_power_control_state_halting(HCI_POWER_MODE power_mode) { 4226 switch (power_mode){ 4227 case HCI_POWER_ON: 4228 hci_power_enter_initializing_state(); 4229 break; 4230 case HCI_POWER_OFF: 4231 // do nothing 4232 break; 4233 case HCI_POWER_SLEEP: 4234 // see hci_run 4235 hci_stack->state = HCI_STATE_FALLING_ASLEEP; 4236 hci_stack->substate = HCI_FALLING_ASLEEP_DISCONNECT; 4237 break; 4238 default: 4239 btstack_assert(false); 4240 break; 4241 } 4242 return ERROR_CODE_SUCCESS; 4243 } 4244 4245 static int hci_power_control_state_falling_asleep(HCI_POWER_MODE power_mode) { 4246 switch (power_mode){ 4247 case HCI_POWER_ON: 4248 hci_power_enter_initializing_state(); 4249 break; 4250 case HCI_POWER_OFF: 4251 hci_power_enter_halting_state(); 4252 break; 4253 case HCI_POWER_SLEEP: 4254 // do nothing 4255 break; 4256 default: 4257 btstack_assert(false); 4258 break; 4259 } 4260 return ERROR_CODE_SUCCESS; 4261 } 4262 4263 static int hci_power_control_state_sleeping(HCI_POWER_MODE power_mode) { 4264 int err; 4265 switch (power_mode){ 4266 case HCI_POWER_ON: 4267 err = hci_power_control_wake(); 4268 if (err) return err; 4269 hci_power_enter_initializing_state(); 4270 break; 4271 case HCI_POWER_OFF: 4272 hci_power_enter_halting_state(); 4273 break; 4274 case HCI_POWER_SLEEP: 4275 // do nothing 4276 break; 4277 default: 4278 btstack_assert(false); 4279 break; 4280 } 4281 return ERROR_CODE_SUCCESS; 4282 } 4283 4284 int hci_power_control(HCI_POWER_MODE power_mode){ 4285 log_info("hci_power_control: %d, current mode %u", power_mode, hci_stack->state); 4286 int err = 0; 4287 switch (hci_stack->state){ 4288 case HCI_STATE_OFF: 4289 err = hci_power_control_state_off(power_mode); 4290 break; 4291 case HCI_STATE_INITIALIZING: 4292 err = hci_power_control_state_initializing(power_mode); 4293 break; 4294 case HCI_STATE_WORKING: 4295 err = hci_power_control_state_working(power_mode); 4296 break; 4297 case HCI_STATE_HALTING: 4298 err = hci_power_control_state_halting(power_mode); 4299 break; 4300 case HCI_STATE_FALLING_ASLEEP: 4301 err = hci_power_control_state_falling_asleep(power_mode); 4302 break; 4303 case HCI_STATE_SLEEPING: 4304 err = hci_power_control_state_sleeping(power_mode); 4305 break; 4306 default: 4307 btstack_assert(false); 4308 break; 4309 } 4310 if (err != 0){ 4311 return err; 4312 } 4313 4314 // create internal event 4315 hci_emit_state(); 4316 4317 // trigger next/first action 4318 hci_run(); 4319 4320 return 0; 4321 } 4322 4323 4324 static void hci_halting_run(void) { 4325 4326 log_info("HCI_STATE_HALTING, substate %x\n", hci_stack->substate); 4327 4328 hci_connection_t *connection; 4329 #ifdef ENABLE_BLE 4330 #ifdef ENABLE_LE_PERIPHERAL 4331 bool stop_advertismenets; 4332 #endif 4333 #endif 4334 4335 switch (hci_stack->substate) { 4336 case HCI_HALTING_CLASSIC_STOP: 4337 #ifdef ENABLE_CLASSIC 4338 if (!hci_can_send_command_packet_now()) return; 4339 4340 if (hci_stack->connectable || hci_stack->discoverable){ 4341 hci_stack->substate = HCI_HALTING_LE_ADV_STOP; 4342 hci_send_cmd(&hci_write_scan_enable, 0); 4343 return; 4344 } 4345 #endif 4346 /* fall through */ 4347 4348 case HCI_HALTING_LE_ADV_STOP: 4349 hci_stack->substate = HCI_HALTING_LE_ADV_STOP; 4350 4351 #ifdef ENABLE_BLE 4352 #ifdef ENABLE_LE_PERIPHERAL 4353 if (!hci_can_send_command_packet_now()) return; 4354 4355 stop_advertismenets = (hci_stack->le_advertisements_state & LE_ADVERTISEMENT_STATE_ACTIVE) != 0; 4356 4357 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 4358 if (hci_extended_advertising_supported()){ 4359 btstack_linked_list_iterator_t it; 4360 btstack_linked_list_iterator_init(&it, &hci_stack->le_advertising_sets); 4361 // stop all periodic advertisements and check if an extended set is active 4362 while (btstack_linked_list_iterator_has_next(&it)){ 4363 le_advertising_set_t * advertising_set = (le_advertising_set_t*) btstack_linked_list_iterator_next(&it); 4364 if ((advertising_set->state & LE_ADVERTISEMENT_STATE_PERIODIC_ACTIVE) != 0) { 4365 advertising_set->state &= ~LE_ADVERTISEMENT_STATE_PERIODIC_ACTIVE; 4366 hci_send_cmd(&hci_le_set_periodic_advertising_enable, 0, advertising_set->advertising_handle); 4367 return; 4368 } 4369 if ((advertising_set->state & LE_ADVERTISEMENT_STATE_ACTIVE) != 0) { 4370 stop_advertismenets = true; 4371 advertising_set->state &= ~LE_ADVERTISEMENT_STATE_ACTIVE; 4372 } 4373 } 4374 if (stop_advertismenets){ 4375 hci_stack->le_advertisements_state &= ~LE_ADVERTISEMENT_STATE_ACTIVE; 4376 hci_send_cmd(&hci_le_set_extended_advertising_enable, 0, 0, NULL, NULL, NULL); 4377 return; 4378 } 4379 } 4380 else 4381 #else 4382 { 4383 if (stop_advertismenets) { 4384 hci_stack->le_advertisements_state &= ~LE_ADVERTISEMENT_STATE_ACTIVE; 4385 hci_send_cmd(&hci_le_set_advertise_enable, 0); 4386 return; 4387 } 4388 } 4389 #endif /* ENABLE_LE_EXTENDED_ADVERTISING*/ 4390 #endif /* ENABLE_LE_PERIPHERAL */ 4391 #endif /* ENABLE_BLE */ 4392 4393 /* fall through */ 4394 4395 case HCI_HALTING_LE_SCAN_STOP: 4396 hci_stack->substate = HCI_HALTING_LE_SCAN_STOP; 4397 if (!hci_can_send_command_packet_now()) return; 4398 4399 #ifdef ENABLE_BLE 4400 #ifdef ENABLE_LE_CENTRAL 4401 if (hci_stack->le_scanning_active){ 4402 hci_le_scan_stop(); 4403 hci_stack->substate = HCI_HALTING_DISCONNECT_ALL; 4404 return; 4405 } 4406 #endif 4407 #endif 4408 4409 /* fall through */ 4410 4411 case HCI_HALTING_DISCONNECT_ALL: 4412 hci_stack->substate = HCI_HALTING_DISCONNECT_ALL; 4413 if (!hci_can_send_command_packet_now()) return; 4414 4415 // close all open connections 4416 connection = (hci_connection_t *) hci_stack->connections; 4417 if (connection) { 4418 hci_con_handle_t con_handle = (uint16_t) connection->con_handle; 4419 4420 // check state 4421 if (connection->state == SENT_DISCONNECT) return; 4422 connection->state = SENT_DISCONNECT; 4423 4424 log_info("HCI_STATE_HALTING, connection %p, handle %u", connection, con_handle); 4425 4426 // finally, send the disconnect command 4427 hci_send_cmd(&hci_disconnect, con_handle, ERROR_CODE_REMOTE_USER_TERMINATED_CONNECTION); 4428 return; 4429 } 4430 4431 btstack_run_loop_remove_timer(&hci_stack->timeout); 4432 4433 hci_stack->substate = HCI_HALTING_READY_FOR_CLOSE; 4434 4435 // no connections left, wait a bit to assert that btstack_cyrpto isn't waiting for an HCI event 4436 log_info("HCI_STATE_HALTING: wait 50 ms"); 4437 hci_stack->substate = HCI_HALTING_W4_CLOSE_TIMER; 4438 btstack_run_loop_set_timer(&hci_stack->timeout, 50); 4439 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_halting_timeout_handler); 4440 btstack_run_loop_add_timer(&hci_stack->timeout); 4441 break; 4442 4443 case HCI_HALTING_CLOSE: 4444 // close left over connections (that had not been properly closed before) 4445 hci_discard_connections(); 4446 4447 log_info("HCI_STATE_HALTING, calling off"); 4448 4449 // switch mode 4450 hci_power_control_off(); 4451 4452 log_info("HCI_STATE_HALTING, emitting state"); 4453 hci_emit_state(); 4454 log_info("HCI_STATE_HALTING, done"); 4455 break; 4456 4457 case HCI_HALTING_W4_CLOSE_TIMER: 4458 // keep waiting 4459 4460 break; 4461 default: 4462 break; 4463 } 4464 }; 4465 4466 static void hci_falling_asleep_run(void){ 4467 hci_connection_t * connection; 4468 switch(hci_stack->substate) { 4469 case HCI_FALLING_ASLEEP_DISCONNECT: 4470 log_info("HCI_STATE_FALLING_ASLEEP"); 4471 // close all open connections 4472 connection = (hci_connection_t *) hci_stack->connections; 4473 if (connection){ 4474 4475 // send disconnect 4476 if (!hci_can_send_command_packet_now()) return; 4477 4478 log_info("HCI_STATE_FALLING_ASLEEP, connection %p, handle %u", connection, (uint16_t)connection->con_handle); 4479 hci_send_cmd(&hci_disconnect, connection->con_handle, ERROR_CODE_REMOTE_USER_TERMINATED_CONNECTION); 4480 4481 // send disconnected event right away - causes higher layer connections to get closed, too. 4482 hci_shutdown_connection(connection); 4483 return; 4484 } 4485 4486 if (hci_classic_supported()){ 4487 // disable page and inquiry scan 4488 if (!hci_can_send_command_packet_now()) return; 4489 4490 log_info("HCI_STATE_HALTING, disabling inq scans"); 4491 hci_send_cmd(&hci_write_scan_enable, hci_stack->connectable << 1); // drop inquiry scan but keep page scan 4492 4493 // continue in next sub state 4494 hci_stack->substate = HCI_FALLING_ASLEEP_W4_WRITE_SCAN_ENABLE; 4495 break; 4496 } 4497 4498 /* fall through */ 4499 4500 case HCI_FALLING_ASLEEP_COMPLETE: 4501 log_info("HCI_STATE_HALTING, calling sleep"); 4502 // switch mode 4503 hci_power_control_sleep(); // changes hci_stack->state to SLEEP 4504 hci_emit_state(); 4505 break; 4506 4507 default: 4508 break; 4509 } 4510 } 4511 4512 #ifdef ENABLE_CLASSIC 4513 4514 static void hci_update_scan_enable(void){ 4515 // 2 = page scan, 1 = inq scan 4516 hci_stack->new_scan_enable_value = (hci_stack->connectable << 1) | hci_stack->discoverable; 4517 hci_stack->gap_tasks_classic |= GAP_TASK_WRITE_SCAN_ENABLE; 4518 hci_run(); 4519 } 4520 4521 void gap_discoverable_control(uint8_t enable){ 4522 if (enable) enable = 1; // normalize argument 4523 4524 if (hci_stack->discoverable == enable){ 4525 hci_emit_discoverable_enabled(hci_stack->discoverable); 4526 return; 4527 } 4528 4529 hci_stack->discoverable = enable; 4530 hci_update_scan_enable(); 4531 } 4532 4533 void gap_connectable_control(uint8_t enable){ 4534 if (enable) enable = 1; // normalize argument 4535 4536 // don't emit event 4537 if (hci_stack->connectable == enable) return; 4538 4539 hci_stack->connectable = enable; 4540 hci_update_scan_enable(); 4541 } 4542 #endif 4543 4544 void gap_local_bd_addr(bd_addr_t address_buffer){ 4545 (void)memcpy(address_buffer, hci_stack->local_bd_addr, 6); 4546 } 4547 4548 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 4549 static void hci_host_num_completed_packets(void){ 4550 4551 // create packet manually as arrays are not supported and num_commands should not get reduced 4552 hci_reserve_packet_buffer(); 4553 uint8_t * packet = hci_get_outgoing_packet_buffer(); 4554 4555 uint16_t size = 0; 4556 uint16_t num_handles = 0; 4557 packet[size++] = 0x35; 4558 packet[size++] = 0x0c; 4559 size++; // skip param len 4560 size++; // skip num handles 4561 4562 // add { handle, packets } entries 4563 btstack_linked_item_t * it; 4564 for (it = (btstack_linked_item_t *) hci_stack->connections; it ; it = it->next){ 4565 hci_connection_t * connection = (hci_connection_t *) it; 4566 if (connection->num_packets_completed){ 4567 little_endian_store_16(packet, size, connection->con_handle); 4568 size += 2; 4569 little_endian_store_16(packet, size, connection->num_packets_completed); 4570 size += 2; 4571 // 4572 num_handles++; 4573 connection->num_packets_completed = 0; 4574 } 4575 } 4576 4577 packet[2] = size - 3; 4578 packet[3] = num_handles; 4579 4580 hci_stack->host_completed_packets = 0; 4581 4582 hci_dump_packet(HCI_COMMAND_DATA_PACKET, 0, packet, size); 4583 hci_stack->hci_transport->send_packet(HCI_COMMAND_DATA_PACKET, packet, size); 4584 4585 // release packet buffer for synchronous transport implementations 4586 if (hci_transport_synchronous()){ 4587 hci_release_packet_buffer(); 4588 hci_emit_transport_packet_sent(); 4589 } 4590 } 4591 #endif 4592 4593 static void hci_halting_timeout_handler(btstack_timer_source_t * ds){ 4594 UNUSED(ds); 4595 hci_stack->substate = HCI_HALTING_CLOSE; 4596 // allow packet handlers to defer final shutdown 4597 hci_emit_state(); 4598 hci_run(); 4599 } 4600 4601 static bool hci_run_acl_fragments(void){ 4602 if (hci_stack->acl_fragmentation_total_size > 0u) { 4603 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(hci_stack->hci_packet_buffer); 4604 hci_connection_t *connection = hci_connection_for_handle(con_handle); 4605 if (connection) { 4606 if (hci_can_send_prepared_acl_packet_now(con_handle)){ 4607 hci_send_acl_packet_fragments(connection); 4608 return true; 4609 } 4610 } else { 4611 // connection gone -> discard further fragments 4612 log_info("hci_run: fragmented ACL packet no connection -> discard fragment"); 4613 hci_stack->acl_fragmentation_total_size = 0; 4614 hci_stack->acl_fragmentation_pos = 0; 4615 } 4616 } 4617 return false; 4618 } 4619 4620 #ifdef ENABLE_CLASSIC 4621 4622 #ifdef ENABLE_HCI_SERIALIZED_CONTROLLER_OPERATIONS 4623 static bool hci_classic_operation_active(void) { 4624 if (hci_stack->inquiry_state >= GAP_INQUIRY_STATE_W4_ACTIVE){ 4625 return true; 4626 } 4627 if (hci_stack->remote_name_state == GAP_REMOTE_NAME_STATE_W4_COMPLETE){ 4628 return true; 4629 } 4630 btstack_linked_item_t * it; 4631 for (it = (btstack_linked_item_t *) hci_stack->connections; it != NULL; it = it->next) { 4632 hci_connection_t *connection = (hci_connection_t *) it; 4633 switch (connection->state) { 4634 case SENT_CREATE_CONNECTION: 4635 case SENT_CANCEL_CONNECTION: 4636 case SENT_DISCONNECT: 4637 return true; 4638 default: 4639 break; 4640 } 4641 } 4642 return false; 4643 } 4644 #endif 4645 4646 static bool hci_run_general_gap_classic(void){ 4647 4648 // assert stack is working and classic is active 4649 if (hci_classic_supported() == false) return false; 4650 if (hci_stack->state != HCI_STATE_WORKING) return false; 4651 4652 // decline incoming connections 4653 if (hci_stack->decline_reason){ 4654 uint8_t reason = hci_stack->decline_reason; 4655 hci_stack->decline_reason = 0; 4656 hci_send_cmd(&hci_reject_connection_request, hci_stack->decline_addr, reason); 4657 return true; 4658 } 4659 4660 if (hci_stack->gap_tasks_classic != 0){ 4661 hci_run_gap_tasks_classic(); 4662 return true; 4663 } 4664 4665 // start/stop inquiry 4666 if ((hci_stack->inquiry_state >= GAP_INQUIRY_DURATION_MIN) && (hci_stack->inquiry_state <= GAP_INQUIRY_DURATION_MAX)){ 4667 #ifdef ENABLE_HCI_SERIALIZED_CONTROLLER_OPERATIONS 4668 if (hci_classic_operation_active() == false) 4669 #endif 4670 { 4671 uint8_t duration = hci_stack->inquiry_state; 4672 hci_stack->inquiry_state = GAP_INQUIRY_STATE_W4_ACTIVE; 4673 hci_send_cmd(&hci_inquiry, hci_stack->inquiry_lap, duration, 0); 4674 return true; 4675 } 4676 } 4677 if (hci_stack->inquiry_state == GAP_INQUIRY_STATE_W2_CANCEL){ 4678 hci_stack->inquiry_state = GAP_INQUIRY_STATE_W4_CANCELLED; 4679 hci_send_cmd(&hci_inquiry_cancel); 4680 return true; 4681 } 4682 // remote name request 4683 if (hci_stack->remote_name_state == GAP_REMOTE_NAME_STATE_W2_SEND){ 4684 #ifdef ENABLE_HCI_SERIALIZED_CONTROLLER_OPERATIONS 4685 if (hci_classic_operation_active() == false) 4686 #endif 4687 { 4688 hci_stack->remote_name_state = GAP_REMOTE_NAME_STATE_W4_COMPLETE; 4689 hci_send_cmd(&hci_remote_name_request, hci_stack->remote_name_addr, 4690 hci_stack->remote_name_page_scan_repetition_mode, 0, hci_stack->remote_name_clock_offset); 4691 return true; 4692 } 4693 } 4694 #ifdef ENABLE_CLASSIC_PAIRING_OOB 4695 // Local OOB data 4696 if (hci_stack->classic_read_local_oob_data){ 4697 hci_stack->classic_read_local_oob_data = false; 4698 if (hci_command_supported(SUPPORTED_HCI_COMMAND_READ_LOCAL_OOB_EXTENDED_DATA_COMMAND)){ 4699 hci_send_cmd(&hci_read_local_extended_oob_data); 4700 } else { 4701 hci_send_cmd(&hci_read_local_oob_data); 4702 } 4703 } 4704 #endif 4705 // pairing 4706 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE){ 4707 uint8_t state = hci_stack->gap_pairing_state; 4708 uint8_t pin_code[16]; 4709 switch (state){ 4710 case GAP_PAIRING_STATE_SEND_PIN: 4711 hci_stack->gap_pairing_state = GAP_PAIRING_STATE_IDLE; 4712 memset(pin_code, 0, 16); 4713 memcpy(pin_code, hci_stack->gap_pairing_input.gap_pairing_pin, hci_stack->gap_pairing_pin_len); 4714 hci_send_cmd(&hci_pin_code_request_reply, hci_stack->gap_pairing_addr, hci_stack->gap_pairing_pin_len, pin_code); 4715 break; 4716 case GAP_PAIRING_STATE_SEND_PIN_NEGATIVE: 4717 hci_stack->gap_pairing_state = GAP_PAIRING_STATE_WAIT_FOR_COMMAND_COMPLETE; 4718 hci_send_cmd(&hci_pin_code_request_negative_reply, hci_stack->gap_pairing_addr); 4719 break; 4720 case GAP_PAIRING_STATE_SEND_PASSKEY: 4721 hci_stack->gap_pairing_state = GAP_PAIRING_STATE_IDLE; 4722 hci_send_cmd(&hci_user_passkey_request_reply, hci_stack->gap_pairing_addr, hci_stack->gap_pairing_input.gap_pairing_passkey); 4723 break; 4724 case GAP_PAIRING_STATE_SEND_PASSKEY_NEGATIVE: 4725 hci_stack->gap_pairing_state = GAP_PAIRING_STATE_WAIT_FOR_COMMAND_COMPLETE; 4726 hci_send_cmd(&hci_user_passkey_request_negative_reply, hci_stack->gap_pairing_addr); 4727 break; 4728 case GAP_PAIRING_STATE_SEND_CONFIRMATION: 4729 hci_stack->gap_pairing_state = GAP_PAIRING_STATE_IDLE; 4730 hci_send_cmd(&hci_user_confirmation_request_reply, hci_stack->gap_pairing_addr); 4731 break; 4732 case GAP_PAIRING_STATE_SEND_CONFIRMATION_NEGATIVE: 4733 hci_stack->gap_pairing_state = GAP_PAIRING_STATE_WAIT_FOR_COMMAND_COMPLETE; 4734 hci_send_cmd(&hci_user_confirmation_request_negative_reply, hci_stack->gap_pairing_addr); 4735 break; 4736 default: 4737 break; 4738 } 4739 return true; 4740 } 4741 return false; 4742 } 4743 #endif 4744 4745 #ifdef ENABLE_BLE 4746 4747 #ifdef ENABLE_LE_CENTRAL 4748 static void hci_le_scan_stop(void){ 4749 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 4750 if (hci_extended_advertising_supported()) { 4751 hci_send_cmd(&hci_le_set_extended_scan_enable, 0, 0, 0, 0); 4752 } else 4753 #endif 4754 { 4755 hci_send_cmd(&hci_le_set_scan_enable, 0, 0); 4756 } 4757 } 4758 #endif 4759 4760 #ifdef ENABLE_LE_PERIPHERAL 4761 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 4762 uint8_t hci_le_extended_advertising_operation_for_chunk(uint16_t pos, uint16_t len){ 4763 uint8_t operation = 0; 4764 if (pos == 0){ 4765 // first fragment or complete data 4766 operation |= 1; 4767 } 4768 if (pos + LE_EXTENDED_ADVERTISING_MAX_CHUNK_LEN >= len){ 4769 // last fragment or complete data 4770 operation |= 2; 4771 } 4772 return operation; 4773 } 4774 #endif 4775 #endif 4776 4777 static bool hci_run_general_gap_le(void){ 4778 4779 // Phase 1: collect what to stop 4780 4781 bool scanning_stop = false; 4782 bool connecting_stop = false; 4783 bool advertising_stop = false; 4784 4785 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 4786 le_advertising_set_t * advertising_stop_set = NULL; 4787 bool periodic_stop = false; 4788 #endif 4789 4790 #ifndef ENABLE_LE_CENTRAL 4791 UNUSED(scanning_stop); 4792 UNUSED(connecting_stop); 4793 #endif 4794 #ifndef ENABLE_LE_PERIPHERAL 4795 UNUSED(advertising_stop); 4796 #endif 4797 4798 // check if own address changes 4799 bool random_address_change = (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_ADDRESS) != 0; 4800 4801 // check if whitelist needs modification 4802 bool whitelist_modification_pending = false; 4803 btstack_linked_list_iterator_t lit; 4804 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 4805 while (btstack_linked_list_iterator_has_next(&lit)){ 4806 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&lit); 4807 if (entry->state & (LE_WHITELIST_REMOVE_FROM_CONTROLLER | LE_WHITELIST_ADD_TO_CONTROLLER)){ 4808 whitelist_modification_pending = true; 4809 break; 4810 } 4811 } 4812 // check if resolving list needs modification 4813 bool resolving_list_modification_pending = false; 4814 #ifdef ENABLE_LE_PRIVACY_ADDRESS_RESOLUTION 4815 4816 bool resolving_list_supported = hci_command_supported(SUPPORTED_HCI_COMMAND_LE_SET_ADDRESS_RESOLUTION_ENABLE); 4817 if (resolving_list_supported && hci_stack->le_resolving_list_state != LE_RESOLVING_LIST_DONE){ 4818 resolving_list_modification_pending = true; 4819 } 4820 #endif 4821 4822 #ifdef ENABLE_LE_CENTRAL 4823 // scanning control 4824 if (hci_stack->le_scanning_active) { 4825 // stop if: 4826 // - parameter change required 4827 // - it's disabled 4828 // - whitelist change required but used for scanning 4829 // - resolving list modified 4830 // - own address changes 4831 bool scanning_uses_whitelist = (hci_stack->le_scan_filter_policy & 1) == 1; 4832 if ((hci_stack->le_scanning_param_update) || 4833 !hci_stack->le_scanning_enabled || 4834 (scanning_uses_whitelist && whitelist_modification_pending) || 4835 resolving_list_modification_pending || 4836 random_address_change){ 4837 4838 scanning_stop = true; 4839 } 4840 } 4841 #endif 4842 4843 #ifdef ENABLE_LE_CENTRAL 4844 // connecting control 4845 bool connecting_with_whitelist; 4846 switch (hci_stack->le_connecting_state){ 4847 case LE_CONNECTING_DIRECT: 4848 case LE_CONNECTING_WHITELIST: 4849 // stop connecting if: 4850 // - connecting uses white and whitelist modification pending 4851 // - if it got disabled 4852 // - resolving list modified 4853 // - own address changes 4854 connecting_with_whitelist = hci_stack->le_connecting_state == LE_CONNECTING_WHITELIST; 4855 if ((connecting_with_whitelist && whitelist_modification_pending) || 4856 (hci_stack->le_connecting_request == LE_CONNECTING_IDLE) || 4857 resolving_list_modification_pending || 4858 random_address_change) { 4859 4860 connecting_stop = true; 4861 } 4862 break; 4863 default: 4864 break; 4865 } 4866 #endif 4867 4868 #ifdef ENABLE_LE_PERIPHERAL 4869 // le advertisement control 4870 if ((hci_stack->le_advertisements_state & LE_ADVERTISEMENT_STATE_ACTIVE) != 0){ 4871 // stop if: 4872 // - parameter change required 4873 // - random address used in advertising and changes 4874 // - it's disabled 4875 // - whitelist change required but used for advertisement filter policy 4876 // - resolving list modified 4877 // - own address changes 4878 bool advertising_uses_whitelist = hci_stack->le_advertisements_filter_policy != 0; 4879 bool advertising_uses_random_address = hci_stack->le_own_addr_type != BD_ADDR_TYPE_LE_PUBLIC; 4880 bool advertising_change = (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_PARAMS) != 0; 4881 if (advertising_change || 4882 (advertising_uses_random_address && random_address_change) || 4883 (hci_stack->le_advertisements_enabled_for_current_roles == 0) || 4884 (advertising_uses_whitelist && whitelist_modification_pending) || 4885 resolving_list_modification_pending || 4886 random_address_change) { 4887 4888 advertising_stop = true; 4889 } 4890 } 4891 4892 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 4893 if (hci_extended_advertising_supported() && (advertising_stop == false)){ 4894 btstack_linked_list_iterator_t it; 4895 btstack_linked_list_iterator_init(&it, &hci_stack->le_advertising_sets); 4896 while (btstack_linked_list_iterator_has_next(&it)){ 4897 le_advertising_set_t * advertising_set = (le_advertising_set_t*) btstack_linked_list_iterator_next(&it); 4898 if ((advertising_set->state & LE_ADVERTISEMENT_STATE_ACTIVE) != 0) { 4899 // stop if: 4900 // - parameter change required 4901 // - random address used in connectable advertising and changes 4902 // - it's disabled 4903 // - whitelist change required but used for advertisement filter policy 4904 // - resolving list modified 4905 // - own address changes 4906 // - advertisement set will be removed 4907 bool advertising_uses_whitelist = advertising_set->extended_params.advertising_filter_policy != 0; 4908 bool advertising_connectable = (advertising_set->extended_params.advertising_event_properties & 1) != 0; 4909 bool advertising_uses_random_address = 4910 (advertising_set->extended_params.own_address_type != BD_ADDR_TYPE_LE_PUBLIC) && 4911 advertising_connectable; 4912 bool advertising_parameter_change = (advertising_set->tasks & LE_ADVERTISEMENT_TASKS_SET_PARAMS) != 0; 4913 bool advertising_enabled = (advertising_set->state & LE_ADVERTISEMENT_STATE_ENABLED) != 0; 4914 bool advertising_set_random_address_change = 4915 (advertising_set->tasks & LE_ADVERTISEMENT_TASKS_SET_ADDRESS) != 0; 4916 bool advertising_set_will_be_removed = 4917 (advertising_set->state & LE_ADVERTISEMENT_TASKS_REMOVE_SET) != 0; 4918 if (advertising_parameter_change || 4919 (advertising_uses_random_address && advertising_set_random_address_change) || 4920 (advertising_enabled == false) || 4921 (advertising_uses_whitelist && whitelist_modification_pending) || 4922 resolving_list_modification_pending || 4923 advertising_set_will_be_removed) { 4924 4925 advertising_stop = true; 4926 advertising_stop_set = advertising_set; 4927 break; 4928 } 4929 } 4930 if ((advertising_set->state & LE_ADVERTISEMENT_STATE_PERIODIC_ACTIVE) != 0) { 4931 // stop if: 4932 // - it's disabled 4933 // - parameter change required 4934 bool periodic_enabled = (advertising_set->state & LE_ADVERTISEMENT_STATE_PERIODIC_ENABLED) != 0; 4935 bool periodic_parameter_change = (advertising_set->tasks & LE_ADVERTISEMENT_TASKS_SET_PERIODIC_PARAMS) != 0; 4936 if ((periodic_enabled == false) || periodic_parameter_change){ 4937 periodic_stop = true; 4938 advertising_stop_set = advertising_set; 4939 } 4940 } 4941 } 4942 } 4943 #endif 4944 4945 #endif 4946 4947 4948 // Phase 2: stop everything that should be off during modifications 4949 4950 #ifdef ENABLE_LE_CENTRAL 4951 if (scanning_stop){ 4952 hci_stack->le_scanning_active = false; 4953 hci_le_scan_stop(); 4954 return true; 4955 } 4956 #endif 4957 4958 #ifdef ENABLE_LE_CENTRAL 4959 if (connecting_stop){ 4960 hci_send_cmd(&hci_le_create_connection_cancel); 4961 return true; 4962 } 4963 #endif 4964 4965 #ifdef ENABLE_LE_PERIPHERAL 4966 if (advertising_stop){ 4967 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 4968 if (hci_extended_advertising_supported()) { 4969 uint8_t advertising_stop_handle; 4970 if (advertising_stop_set != NULL){ 4971 advertising_stop_handle = advertising_stop_set->advertising_handle; 4972 advertising_stop_set->state &= ~LE_ADVERTISEMENT_STATE_ACTIVE; 4973 } else { 4974 advertising_stop_handle = 0; 4975 hci_stack->le_advertisements_state &= ~LE_ADVERTISEMENT_STATE_ACTIVE; 4976 } 4977 const uint8_t advertising_handles[] = { advertising_stop_handle }; 4978 const uint16_t durations[] = { 0 }; 4979 const uint16_t max_events[] = { 0 }; 4980 hci_send_cmd(&hci_le_set_extended_advertising_enable, 0, 1, advertising_handles, durations, max_events); 4981 } else 4982 #endif 4983 { 4984 hci_stack->le_advertisements_state &= ~LE_ADVERTISEMENT_STATE_ACTIVE; 4985 hci_send_cmd(&hci_le_set_advertise_enable, 0); 4986 } 4987 return true; 4988 } 4989 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 4990 if (periodic_stop){ 4991 advertising_stop_set->state &= ~LE_ADVERTISEMENT_STATE_PERIODIC_ACTIVE; 4992 hci_send_cmd(&hci_le_set_periodic_advertising_enable, 0, advertising_stop_set->advertising_handle); 4993 return true; 4994 } 4995 #endif 4996 #endif 4997 4998 // Phase 3: modify 4999 5000 if (random_address_change){ 5001 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_SET_ADDRESS; 5002 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 5003 if (hci_extended_advertising_supported()) { 5004 hci_send_cmd(&hci_le_set_advertising_set_random_address, 0, hci_stack->le_random_address); 5005 } 5006 #endif 5007 { 5008 hci_send_cmd(&hci_le_set_random_address, hci_stack->le_random_address); 5009 } 5010 return true; 5011 } 5012 5013 #ifdef ENABLE_LE_CENTRAL 5014 if (hci_stack->le_scanning_param_update){ 5015 hci_stack->le_scanning_param_update = false; 5016 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 5017 if (hci_extended_advertising_supported()){ 5018 // prepare arrays for all PHYs 5019 uint8_t scan_types[1] = { hci_stack->le_scan_type }; 5020 uint16_t scan_intervals[1] = { hci_stack->le_scan_interval }; 5021 uint16_t scan_windows[1] = { hci_stack->le_scan_window }; 5022 uint8_t scanning_phys = 1; // LE 1M PHY 5023 hci_send_cmd(&hci_le_set_extended_scan_parameters, hci_stack->le_own_addr_type, 5024 hci_stack->le_scan_filter_policy, scanning_phys, scan_types, scan_intervals, scan_windows); 5025 } else 5026 #endif 5027 { 5028 hci_send_cmd(&hci_le_set_scan_parameters, hci_stack->le_scan_type, hci_stack->le_scan_interval, hci_stack->le_scan_window, 5029 hci_stack->le_own_addr_type, hci_stack->le_scan_filter_policy); 5030 } 5031 return true; 5032 } 5033 #endif 5034 5035 #ifdef ENABLE_LE_PERIPHERAL 5036 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_PARAMS){ 5037 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_SET_PARAMS; 5038 hci_stack->le_advertisements_own_addr_type = hci_stack->le_own_addr_type; 5039 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 5040 if (hci_extended_advertising_supported()){ 5041 // map advertisment type to advertising event properties 5042 uint16_t adv_event_properties = 0; 5043 const uint16_t mapping[] = { 0b00010011, 0b00010101, 0b00011101, 0b00010010, 0b00010000}; 5044 if (hci_stack->le_advertisements_type < (sizeof(mapping)/sizeof(uint16_t))){ 5045 adv_event_properties = mapping[hci_stack->le_advertisements_type]; 5046 } 5047 hci_stack->le_advertising_set_in_current_command = 0; 5048 hci_send_cmd(&hci_le_set_extended_advertising_parameters, 5049 0, 5050 adv_event_properties, 5051 hci_stack->le_advertisements_interval_min, 5052 hci_stack->le_advertisements_interval_max, 5053 hci_stack->le_advertisements_channel_map, 5054 hci_stack->le_advertisements_own_addr_type, 5055 hci_stack->le_advertisements_direct_address_type, 5056 hci_stack->le_advertisements_direct_address, 5057 hci_stack->le_advertisements_filter_policy, 5058 0x7f, // tx power: no preference 5059 0x01, // primary adv phy: LE 1M 5060 0, // secondary adv max skip 5061 0, // secondary adv phy 5062 0, // adv sid 5063 0 // scan request notification 5064 ); 5065 } 5066 #endif 5067 { 5068 hci_send_cmd(&hci_le_set_advertising_parameters, 5069 hci_stack->le_advertisements_interval_min, 5070 hci_stack->le_advertisements_interval_max, 5071 hci_stack->le_advertisements_type, 5072 hci_stack->le_advertisements_own_addr_type, 5073 hci_stack->le_advertisements_direct_address_type, 5074 hci_stack->le_advertisements_direct_address, 5075 hci_stack->le_advertisements_channel_map, 5076 hci_stack->le_advertisements_filter_policy); 5077 } 5078 return true; 5079 } 5080 5081 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_ADV_DATA){ 5082 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_SET_ADV_DATA; 5083 uint8_t adv_data_clean[31]; 5084 memset(adv_data_clean, 0, sizeof(adv_data_clean)); 5085 (void)memcpy(adv_data_clean, hci_stack->le_advertisements_data, 5086 hci_stack->le_advertisements_data_len); 5087 btstack_replace_bd_addr_placeholder(adv_data_clean, hci_stack->le_advertisements_data_len, hci_stack->local_bd_addr); 5088 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 5089 if (hci_extended_advertising_supported()){ 5090 hci_stack->le_advertising_set_in_current_command = 0; 5091 hci_send_cmd(&hci_le_set_extended_advertising_data, 0, 0x03, 0x01, hci_stack->le_advertisements_data_len, adv_data_clean); 5092 } else 5093 #endif 5094 { 5095 hci_send_cmd(&hci_le_set_advertising_data, hci_stack->le_advertisements_data_len, adv_data_clean); 5096 } 5097 return true; 5098 } 5099 5100 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA){ 5101 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA; 5102 uint8_t scan_data_clean[31]; 5103 memset(scan_data_clean, 0, sizeof(scan_data_clean)); 5104 (void)memcpy(scan_data_clean, hci_stack->le_scan_response_data, 5105 hci_stack->le_scan_response_data_len); 5106 btstack_replace_bd_addr_placeholder(scan_data_clean, hci_stack->le_scan_response_data_len, hci_stack->local_bd_addr); 5107 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 5108 if (hci_extended_advertising_supported()){ 5109 hci_stack->le_advertising_set_in_current_command = 0; 5110 hci_send_cmd(&hci_le_set_extended_scan_response_data, 0, 0x03, 0x01, hci_stack->le_scan_response_data_len, scan_data_clean); 5111 } else 5112 #endif 5113 { 5114 hci_send_cmd(&hci_le_set_scan_response_data, hci_stack->le_scan_response_data_len, scan_data_clean); 5115 } 5116 return true; 5117 } 5118 5119 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 5120 if (hci_extended_advertising_supported()) { 5121 btstack_linked_list_iterator_t it; 5122 btstack_linked_list_iterator_init(&it, &hci_stack->le_advertising_sets); 5123 while (btstack_linked_list_iterator_has_next(&it)){ 5124 le_advertising_set_t * advertising_set = (le_advertising_set_t*) btstack_linked_list_iterator_next(&it); 5125 if ((advertising_set->tasks & LE_ADVERTISEMENT_TASKS_REMOVE_SET) != 0) { 5126 advertising_set->tasks &= ~LE_ADVERTISEMENT_TASKS_REMOVE_SET; 5127 hci_stack->le_advertising_set_in_current_command = advertising_set->advertising_handle; 5128 hci_send_cmd(&hci_le_remove_advertising_set, advertising_set->advertising_handle); 5129 return true; 5130 } 5131 if ((advertising_set->tasks & LE_ADVERTISEMENT_TASKS_SET_ADDRESS) != 0){ 5132 advertising_set->tasks &= ~LE_ADVERTISEMENT_TASKS_SET_ADDRESS; 5133 hci_send_cmd(&hci_le_set_advertising_set_random_address, advertising_set->advertising_handle, advertising_set->random_address); 5134 return true; 5135 } 5136 if ((advertising_set->tasks & LE_ADVERTISEMENT_TASKS_SET_PARAMS) != 0){ 5137 advertising_set->tasks &= ~LE_ADVERTISEMENT_TASKS_SET_PARAMS; 5138 hci_stack->le_advertising_set_in_current_command = advertising_set->advertising_handle; 5139 hci_send_cmd(&hci_le_set_extended_advertising_parameters, 5140 advertising_set->advertising_handle, 5141 advertising_set->extended_params.advertising_event_properties, 5142 advertising_set->extended_params.primary_advertising_interval_min, 5143 advertising_set->extended_params.primary_advertising_interval_max, 5144 advertising_set->extended_params.primary_advertising_channel_map, 5145 advertising_set->extended_params.own_address_type, 5146 advertising_set->extended_params.peer_address_type, 5147 advertising_set->extended_params.peer_address, 5148 advertising_set->extended_params.advertising_filter_policy, 5149 advertising_set->extended_params.advertising_tx_power, 5150 advertising_set->extended_params.primary_advertising_phy, 5151 advertising_set->extended_params.secondary_advertising_max_skip, 5152 advertising_set->extended_params.secondary_advertising_phy, 5153 advertising_set->extended_params.advertising_sid, 5154 advertising_set->extended_params.scan_request_notification_enable 5155 ); 5156 return true; 5157 } 5158 if ((advertising_set->tasks & LE_ADVERTISEMENT_TASKS_SET_ADV_DATA) != 0) { 5159 uint16_t pos = advertising_set->adv_data_pos; 5160 uint8_t operation = hci_le_extended_advertising_operation_for_chunk(pos, advertising_set->adv_data_len); 5161 uint16_t data_to_upload = btstack_min(advertising_set->adv_data_len - pos, LE_EXTENDED_ADVERTISING_MAX_CHUNK_LEN); 5162 if ((operation & 0x02) != 0){ 5163 // last fragment or complete data 5164 operation |= 2; 5165 advertising_set->adv_data_pos = 0; 5166 advertising_set->tasks &= ~LE_ADVERTISEMENT_TASKS_SET_ADV_DATA; 5167 } else { 5168 advertising_set->adv_data_pos += data_to_upload; 5169 } 5170 hci_stack->le_advertising_set_in_current_command = advertising_set->advertising_handle; 5171 hci_send_cmd(&hci_le_set_extended_advertising_data, advertising_set->advertising_handle, operation, 0x01, data_to_upload, &advertising_set->adv_data[pos]); 5172 return true; 5173 } 5174 if ((advertising_set->tasks & LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA) != 0) { 5175 uint16_t pos = advertising_set->scan_data_pos; 5176 uint8_t operation = hci_le_extended_advertising_operation_for_chunk(pos, advertising_set->scan_data_len); 5177 uint16_t data_to_upload = btstack_min(advertising_set->scan_data_len - pos, LE_EXTENDED_ADVERTISING_MAX_CHUNK_LEN); 5178 if ((operation & 0x02) != 0){ 5179 advertising_set->scan_data_pos = 0; 5180 advertising_set->tasks &= ~LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA; 5181 } else { 5182 advertising_set->scan_data_pos += data_to_upload; 5183 } 5184 hci_stack->le_advertising_set_in_current_command = advertising_set->advertising_handle; 5185 hci_send_cmd(&hci_le_set_extended_scan_response_data, operation, 0x03, 0x01, data_to_upload, &advertising_set->scan_data[pos]); 5186 return true; 5187 } 5188 if ((advertising_set->tasks & LE_ADVERTISEMENT_TASKS_SET_PERIODIC_PARAMS) != 0){ 5189 advertising_set->tasks &= ~LE_ADVERTISEMENT_TASKS_SET_PERIODIC_PARAMS; 5190 hci_stack->le_advertising_set_in_current_command = advertising_set->advertising_handle; 5191 hci_send_cmd(&hci_le_set_periodic_advertising_parameters, 5192 advertising_set->advertising_handle, 5193 advertising_set->periodic_params.periodic_advertising_interval_min, 5194 advertising_set->periodic_params.periodic_advertising_interval_max, 5195 advertising_set->periodic_params.periodic_advertising_properties); 5196 return true; 5197 } 5198 if ((advertising_set->tasks & LE_ADVERTISEMENT_TASKS_SET_PERIODIC_DATA) != 0) { 5199 uint16_t pos = advertising_set->periodic_data_pos; 5200 uint8_t operation = hci_le_extended_advertising_operation_for_chunk(pos, advertising_set->periodic_data_len); 5201 uint16_t data_to_upload = btstack_min(advertising_set->periodic_data_len - pos, LE_EXTENDED_ADVERTISING_MAX_CHUNK_LEN); 5202 if ((operation & 0x02) != 0){ 5203 // last fragment or complete data 5204 operation |= 2; 5205 advertising_set->periodic_data_pos = 0; 5206 advertising_set->tasks &= ~LE_ADVERTISEMENT_TASKS_SET_PERIODIC_DATA; 5207 } else { 5208 advertising_set->periodic_data_pos += data_to_upload; 5209 } 5210 hci_stack->le_advertising_set_in_current_command = advertising_set->advertising_handle; 5211 hci_send_cmd(&hci_le_set_periodic_advertising_data, advertising_set->advertising_handle, operation, data_to_upload, &advertising_set->periodic_data[pos]); 5212 return true; 5213 } 5214 } 5215 } 5216 #endif 5217 5218 5219 #endif 5220 5221 5222 #ifdef ENABLE_LE_CENTRAL 5223 // if connect with whitelist was active and is not cancelled yet, wait until next time 5224 if (hci_stack->le_connecting_state == LE_CONNECTING_CANCEL) return false; 5225 #endif 5226 5227 // LE Whitelist Management 5228 if (whitelist_modification_pending){ 5229 // add/remove entries 5230 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 5231 while (btstack_linked_list_iterator_has_next(&lit)){ 5232 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&lit); 5233 if (entry->state & LE_WHITELIST_REMOVE_FROM_CONTROLLER){ 5234 entry->state &= ~LE_WHITELIST_REMOVE_FROM_CONTROLLER; 5235 hci_send_cmd(&hci_le_remove_device_from_white_list, entry->address_type, entry->address); 5236 return true; 5237 } 5238 if (entry->state & LE_WHITELIST_ADD_TO_CONTROLLER){ 5239 entry->state &= ~LE_WHITELIST_ADD_TO_CONTROLLER; 5240 entry->state |= LE_WHITELIST_ON_CONTROLLER; 5241 hci_send_cmd(&hci_le_add_device_to_white_list, entry->address_type, entry->address); 5242 return true; 5243 } 5244 if ((entry->state & LE_WHITELIST_ON_CONTROLLER) == 0){ 5245 btstack_linked_list_remove(&hci_stack->le_whitelist, (btstack_linked_item_t *) entry); 5246 btstack_memory_whitelist_entry_free(entry); 5247 } 5248 } 5249 } 5250 5251 #ifdef ENABLE_LE_PRIVACY_ADDRESS_RESOLUTION 5252 // LE Resolving List Management 5253 if (resolving_list_supported) { 5254 uint16_t i; 5255 switch (hci_stack->le_resolving_list_state) { 5256 case LE_RESOLVING_LIST_SEND_ENABLE_ADDRESS_RESOLUTION: 5257 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_READ_SIZE; 5258 hci_send_cmd(&hci_le_set_address_resolution_enabled, 1); 5259 return true; 5260 case LE_RESOLVING_LIST_READ_SIZE: 5261 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_SEND_CLEAR; 5262 hci_send_cmd(&hci_le_read_resolving_list_size); 5263 return true; 5264 case LE_RESOLVING_LIST_SEND_CLEAR: 5265 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_REMOVE_ENTRIES; 5266 (void) memset(hci_stack->le_resolving_list_add_entries, 0xff, 5267 sizeof(hci_stack->le_resolving_list_add_entries)); 5268 (void) memset(hci_stack->le_resolving_list_remove_entries, 0, 5269 sizeof(hci_stack->le_resolving_list_remove_entries)); 5270 hci_send_cmd(&hci_le_clear_resolving_list); 5271 return true; 5272 case LE_RESOLVING_LIST_REMOVE_ENTRIES: 5273 for (i = 0; i < MAX_NUM_RESOLVING_LIST_ENTRIES && i < le_device_db_max_count(); i++) { 5274 uint8_t offset = i >> 3; 5275 uint8_t mask = 1 << (i & 7); 5276 if ((hci_stack->le_resolving_list_remove_entries[offset] & mask) == 0) continue; 5277 hci_stack->le_resolving_list_remove_entries[offset] &= ~mask; 5278 bd_addr_t peer_identity_addreses; 5279 int peer_identity_addr_type = (int) BD_ADDR_TYPE_UNKNOWN; 5280 sm_key_t peer_irk; 5281 le_device_db_info(i, &peer_identity_addr_type, peer_identity_addreses, peer_irk); 5282 if (peer_identity_addr_type == BD_ADDR_TYPE_UNKNOWN) continue; 5283 5284 #ifdef ENABLE_LE_WHITELIST_TOUCH_AFTER_RESOLVING_LIST_UPDATE 5285 // trigger whitelist entry 'update' (work around for controller bug) 5286 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 5287 while (btstack_linked_list_iterator_has_next(&lit)) { 5288 whitelist_entry_t *entry = (whitelist_entry_t *) btstack_linked_list_iterator_next(&lit); 5289 if (entry->address_type != peer_identity_addr_type) continue; 5290 if (memcmp(entry->address, peer_identity_addreses, 6) != 0) continue; 5291 log_info("trigger whitelist update %s", bd_addr_to_str(peer_identity_addreses)); 5292 entry->state |= LE_WHITELIST_REMOVE_FROM_CONTROLLER | LE_WHITELIST_ADD_TO_CONTROLLER; 5293 } 5294 #endif 5295 5296 hci_send_cmd(&hci_le_remove_device_from_resolving_list, peer_identity_addr_type, 5297 peer_identity_addreses); 5298 return true; 5299 } 5300 5301 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_ADD_ENTRIES; 5302 5303 /* fall through */ 5304 5305 case LE_RESOLVING_LIST_ADD_ENTRIES: 5306 for (i = 0; i < MAX_NUM_RESOLVING_LIST_ENTRIES && i < le_device_db_max_count(); i++) { 5307 uint8_t offset = i >> 3; 5308 uint8_t mask = 1 << (i & 7); 5309 if ((hci_stack->le_resolving_list_add_entries[offset] & mask) == 0) continue; 5310 hci_stack->le_resolving_list_add_entries[offset] &= ~mask; 5311 bd_addr_t peer_identity_addreses; 5312 int peer_identity_addr_type = (int) BD_ADDR_TYPE_UNKNOWN; 5313 sm_key_t peer_irk; 5314 le_device_db_info(i, &peer_identity_addr_type, peer_identity_addreses, peer_irk); 5315 if (peer_identity_addr_type == BD_ADDR_TYPE_UNKNOWN) continue; 5316 const uint8_t *local_irk = gap_get_persistent_irk(); 5317 // command uses format specifier 'P' that stores 16-byte value without flip 5318 uint8_t local_irk_flipped[16]; 5319 uint8_t peer_irk_flipped[16]; 5320 reverse_128(local_irk, local_irk_flipped); 5321 reverse_128(peer_irk, peer_irk_flipped); 5322 hci_send_cmd(&hci_le_add_device_to_resolving_list, peer_identity_addr_type, peer_identity_addreses, 5323 peer_irk_flipped, local_irk_flipped); 5324 return true; 5325 } 5326 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_DONE; 5327 break; 5328 5329 default: 5330 break; 5331 } 5332 } 5333 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_DONE; 5334 #endif 5335 5336 // post-pone all actions until stack is fully working 5337 if (hci_stack->state != HCI_STATE_WORKING) return false; 5338 5339 // advertisements, active scanning, and creating connections requires random address to be set if using private address 5340 if ( (hci_stack->le_own_addr_type != BD_ADDR_TYPE_LE_PUBLIC) && (hci_stack->le_random_address_set == 0u) ) return false; 5341 5342 // Phase 4: restore state 5343 5344 #ifdef ENABLE_LE_CENTRAL 5345 // re-start scanning 5346 if ((hci_stack->le_scanning_enabled && !hci_stack->le_scanning_active)){ 5347 hci_stack->le_scanning_active = true; 5348 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 5349 if (hci_extended_advertising_supported()){ 5350 hci_send_cmd(&hci_le_set_extended_scan_enable, 1, 0, 0, 0); 5351 } else 5352 #endif 5353 { 5354 hci_send_cmd(&hci_le_set_scan_enable, 1, 0); 5355 } 5356 return true; 5357 } 5358 #endif 5359 5360 #ifdef ENABLE_LE_CENTRAL 5361 // re-start connecting 5362 if ( (hci_stack->le_connecting_state == LE_CONNECTING_IDLE) && (hci_stack->le_connecting_request == LE_CONNECTING_WHITELIST)){ 5363 bd_addr_t null_addr; 5364 memset(null_addr, 0, 6); 5365 hci_stack->le_connection_own_addr_type = hci_stack->le_own_addr_type; 5366 hci_get_own_address_for_addr_type(hci_stack->le_connection_own_addr_type, hci_stack->le_connection_own_address); 5367 hci_send_cmd(&hci_le_create_connection, 5368 hci_stack->le_connection_scan_interval, // scan interval: 60 ms 5369 hci_stack->le_connection_scan_window, // scan interval: 30 ms 5370 1, // use whitelist 5371 0, // peer address type 5372 null_addr, // peer bd addr 5373 hci_stack->le_connection_own_addr_type, // our addr type: 5374 hci_stack->le_connection_interval_min, // conn interval min 5375 hci_stack->le_connection_interval_max, // conn interval max 5376 hci_stack->le_connection_latency, // conn latency 5377 hci_stack->le_supervision_timeout, // conn latency 5378 hci_stack->le_minimum_ce_length, // min ce length 5379 hci_stack->le_maximum_ce_length // max ce length 5380 ); 5381 return true; 5382 } 5383 #endif 5384 5385 #ifdef ENABLE_LE_PERIPHERAL 5386 // re-start advertising 5387 if (hci_stack->le_advertisements_enabled_for_current_roles && ((hci_stack->le_advertisements_state & LE_ADVERTISEMENT_STATE_ACTIVE) == 0)){ 5388 // check if advertisements should be enabled given 5389 hci_stack->le_advertisements_state |= LE_ADVERTISEMENT_STATE_ACTIVE; 5390 hci_get_own_address_for_addr_type(hci_stack->le_advertisements_own_addr_type, hci_stack->le_advertisements_own_address); 5391 5392 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 5393 if (hci_extended_advertising_supported()){ 5394 const uint8_t advertising_handles[] = { 0 }; 5395 const uint16_t durations[] = { 0 }; 5396 const uint16_t max_events[] = { 0 }; 5397 hci_send_cmd(&hci_le_set_extended_advertising_enable, 1, 1, advertising_handles, durations, max_events); 5398 } else 5399 #endif 5400 { 5401 hci_send_cmd(&hci_le_set_advertise_enable, 1); 5402 } 5403 return true; 5404 } 5405 5406 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 5407 if (hci_extended_advertising_supported()) { 5408 btstack_linked_list_iterator_t it; 5409 btstack_linked_list_iterator_init(&it, &hci_stack->le_advertising_sets); 5410 while (btstack_linked_list_iterator_has_next(&it)) { 5411 le_advertising_set_t *advertising_set = (le_advertising_set_t *) btstack_linked_list_iterator_next(&it); 5412 if (((advertising_set->state & LE_ADVERTISEMENT_STATE_ENABLED) != 0) && ((advertising_set->state & LE_ADVERTISEMENT_STATE_ACTIVE) == 0)){ 5413 advertising_set->state |= LE_ADVERTISEMENT_STATE_ACTIVE; 5414 const uint8_t advertising_handles[] = { advertising_set->advertising_handle }; 5415 const uint16_t durations[] = { advertising_set->enable_timeout }; 5416 const uint16_t max_events[] = { advertising_set->enable_max_scan_events }; 5417 hci_send_cmd(&hci_le_set_extended_advertising_enable, 1, 1, advertising_handles, durations, max_events); 5418 return true; 5419 } 5420 if (((advertising_set->state & LE_ADVERTISEMENT_STATE_PERIODIC_ENABLED) != 0) && ((advertising_set->state & LE_ADVERTISEMENT_STATE_PERIODIC_ACTIVE) == 0)){ 5421 advertising_set->state |= LE_ADVERTISEMENT_STATE_PERIODIC_ACTIVE; 5422 uint8_t enable = 1; 5423 if (advertising_set->periodic_include_adi){ 5424 enable |= 2; 5425 } 5426 hci_send_cmd(&hci_le_set_periodic_advertising_enable, enable, advertising_set->advertising_handle); 5427 return true; 5428 } 5429 } 5430 } 5431 #endif 5432 #endif 5433 5434 return false; 5435 } 5436 #endif 5437 5438 static bool hci_run_general_pending_commands(void){ 5439 btstack_linked_item_t * it; 5440 for (it = (btstack_linked_item_t *) hci_stack->connections; it != NULL; it = it->next){ 5441 hci_connection_t * connection = (hci_connection_t *) it; 5442 5443 switch(connection->state){ 5444 case SEND_CREATE_CONNECTION: 5445 switch(connection->address_type){ 5446 #ifdef ENABLE_CLASSIC 5447 case BD_ADDR_TYPE_ACL: 5448 log_info("sending hci_create_connection"); 5449 hci_send_cmd(&hci_create_connection, connection->address, hci_usable_acl_packet_types(), 0, 0, 0, hci_stack->allow_role_switch); 5450 break; 5451 #endif 5452 default: 5453 #ifdef ENABLE_BLE 5454 #ifdef ENABLE_LE_CENTRAL 5455 log_info("sending hci_le_create_connection"); 5456 hci_stack->le_connection_own_addr_type = hci_stack->le_own_addr_type; 5457 hci_get_own_address_for_addr_type(hci_stack->le_connection_own_addr_type, hci_stack->le_connection_own_address); 5458 hci_send_cmd(&hci_le_create_connection, 5459 hci_stack->le_connection_scan_interval, // conn scan interval 5460 hci_stack->le_connection_scan_window, // conn scan windows 5461 0, // don't use whitelist 5462 connection->address_type, // peer address type 5463 connection->address, // peer bd addr 5464 hci_stack->le_connection_own_addr_type, // our addr type: 5465 hci_stack->le_connection_interval_min, // conn interval min 5466 hci_stack->le_connection_interval_max, // conn interval max 5467 hci_stack->le_connection_latency, // conn latency 5468 hci_stack->le_supervision_timeout, // conn latency 5469 hci_stack->le_minimum_ce_length, // min ce length 5470 hci_stack->le_maximum_ce_length // max ce length 5471 ); 5472 connection->state = SENT_CREATE_CONNECTION; 5473 #endif 5474 #endif 5475 break; 5476 } 5477 return true; 5478 5479 #ifdef ENABLE_CLASSIC 5480 case RECEIVED_CONNECTION_REQUEST: 5481 connection->role = HCI_ROLE_SLAVE; 5482 if (connection->address_type == BD_ADDR_TYPE_ACL){ 5483 log_info("sending hci_accept_connection_request"); 5484 connection->state = ACCEPTED_CONNECTION_REQUEST; 5485 hci_send_cmd(&hci_accept_connection_request, connection->address, hci_stack->master_slave_policy); 5486 return true; 5487 } 5488 break; 5489 #endif 5490 5491 #ifdef ENABLE_BLE 5492 #ifdef ENABLE_LE_CENTRAL 5493 case SEND_CANCEL_CONNECTION: 5494 connection->state = SENT_CANCEL_CONNECTION; 5495 hci_send_cmd(&hci_le_create_connection_cancel); 5496 return true; 5497 #endif 5498 #endif 5499 case SEND_DISCONNECT: 5500 connection->state = SENT_DISCONNECT; 5501 hci_send_cmd(&hci_disconnect, connection->con_handle, ERROR_CODE_REMOTE_USER_TERMINATED_CONNECTION); 5502 return true; 5503 5504 default: 5505 break; 5506 } 5507 5508 // no further commands if connection is about to get shut down 5509 if (connection->state == SENT_DISCONNECT) continue; 5510 5511 #ifdef ENABLE_CLASSIC 5512 5513 // Handling link key request requires remote supported features 5514 if (((connection->authentication_flags & AUTH_FLAG_HANDLE_LINK_KEY_REQUEST) != 0)){ 5515 log_info("responding to link key request, have link key db: %u", hci_stack->link_key_db != NULL); 5516 connectionClearAuthenticationFlags(connection, AUTH_FLAG_HANDLE_LINK_KEY_REQUEST); 5517 5518 bool have_link_key = connection->link_key_type != INVALID_LINK_KEY; 5519 bool security_level_sufficient = have_link_key && (gap_security_level_for_link_key_type(connection->link_key_type) >= connection->requested_security_level); 5520 if (have_link_key && security_level_sufficient){ 5521 hci_send_cmd(&hci_link_key_request_reply, connection->address, &connection->link_key); 5522 } else { 5523 hci_send_cmd(&hci_link_key_request_negative_reply, connection->address); 5524 } 5525 return true; 5526 } 5527 5528 if (connection->authentication_flags & AUTH_FLAG_DENY_PIN_CODE_REQUEST){ 5529 log_info("denying to pin request"); 5530 connectionClearAuthenticationFlags(connection, AUTH_FLAG_DENY_PIN_CODE_REQUEST); 5531 hci_send_cmd(&hci_pin_code_request_negative_reply, connection->address); 5532 return true; 5533 } 5534 5535 // security assessment requires remote features 5536 if ((connection->authentication_flags & AUTH_FLAG_RECV_IO_CAPABILITIES_REQUEST) != 0){ 5537 connectionClearAuthenticationFlags(connection, AUTH_FLAG_RECV_IO_CAPABILITIES_REQUEST); 5538 hci_ssp_assess_security_on_io_cap_request(connection); 5539 // 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 5540 } 5541 5542 if (connection->authentication_flags & AUTH_FLAG_SEND_IO_CAPABILITIES_REPLY){ 5543 connectionClearAuthenticationFlags(connection, AUTH_FLAG_SEND_IO_CAPABILITIES_REPLY); 5544 // set authentication requirements: 5545 // - MITM = ssp_authentication_requirement (USER) | requested_security_level (dynamic) 5546 // - BONDING MODE: dedicated if requested, bondable otherwise. Drop bondable if not set for remote 5547 uint8_t authreq = hci_stack->ssp_authentication_requirement & 1; 5548 if (gap_mitm_protection_required_for_security_level(connection->requested_security_level)){ 5549 authreq |= 1; 5550 } 5551 bool bonding = hci_stack->bondable; 5552 if (connection->authentication_flags & AUTH_FLAG_RECV_IO_CAPABILITIES_RESPONSE){ 5553 // if we have received IO Cap Response, we're in responder role 5554 bool remote_bonding = connection->io_cap_response_auth_req >= SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_DEDICATED_BONDING; 5555 if (bonding && !remote_bonding){ 5556 log_info("Remote not bonding, dropping local flag"); 5557 bonding = false; 5558 } 5559 } 5560 if (bonding){ 5561 if (connection->bonding_flags & BONDING_DEDICATED){ 5562 authreq |= SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_DEDICATED_BONDING; 5563 } else { 5564 authreq |= SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_GENERAL_BONDING; 5565 } 5566 } 5567 uint8_t have_oob_data = 0; 5568 #ifdef ENABLE_CLASSIC_PAIRING_OOB 5569 if (connection->classic_oob_c_192 != NULL){ 5570 have_oob_data |= 1; 5571 } 5572 if (connection->classic_oob_c_256 != NULL){ 5573 have_oob_data |= 2; 5574 } 5575 #endif 5576 hci_send_cmd(&hci_io_capability_request_reply, &connection->address, hci_stack->ssp_io_capability, have_oob_data, authreq); 5577 return true; 5578 } 5579 5580 if (connection->authentication_flags & AUTH_FLAG_SEND_IO_CAPABILITIES_NEGATIVE_REPLY) { 5581 connectionClearAuthenticationFlags(connection, AUTH_FLAG_SEND_IO_CAPABILITIES_NEGATIVE_REPLY); 5582 hci_send_cmd(&hci_io_capability_request_negative_reply, &connection->address, ERROR_CODE_PAIRING_NOT_ALLOWED); 5583 return true; 5584 } 5585 5586 #ifdef ENABLE_CLASSIC_PAIRING_OOB 5587 if (connection->authentication_flags & AUTH_FLAG_SEND_REMOTE_OOB_DATA_REPLY){ 5588 connectionClearAuthenticationFlags(connection, AUTH_FLAG_SEND_REMOTE_OOB_DATA_REPLY); 5589 const uint8_t zero[16] = { 0 }; 5590 const uint8_t * r_192 = zero; 5591 const uint8_t * c_192 = zero; 5592 const uint8_t * r_256 = zero; 5593 const uint8_t * c_256 = zero; 5594 // verify P-256 OOB 5595 if ((connection->classic_oob_c_256 != NULL) && hci_command_supported(SUPPORTED_HCI_COMMAND_REMOTE_OOB_EXTENDED_DATA_REQUEST_REPLY)) { 5596 c_256 = connection->classic_oob_c_256; 5597 if (connection->classic_oob_r_256 != NULL) { 5598 r_256 = connection->classic_oob_r_256; 5599 } 5600 } 5601 // verify P-192 OOB 5602 if ((connection->classic_oob_c_192 != NULL)) { 5603 c_192 = connection->classic_oob_c_192; 5604 if (connection->classic_oob_r_192 != NULL) { 5605 r_192 = connection->classic_oob_r_192; 5606 } 5607 } 5608 5609 // assess security 5610 bool need_level_4 = hci_stack->gap_secure_connections_only_mode || (connection->requested_security_level == LEVEL_4); 5611 bool can_reach_level_4 = hci_remote_sc_enabled(connection) && (c_256 != NULL); 5612 if (need_level_4 && !can_reach_level_4){ 5613 log_info("Level 4 required, but not possible -> abort"); 5614 hci_pairing_complete(connection, ERROR_CODE_INSUFFICIENT_SECURITY); 5615 // send oob negative reply 5616 c_256 = NULL; 5617 c_192 = NULL; 5618 } 5619 5620 // Reply 5621 if (c_256 != zero) { 5622 hci_send_cmd(&hci_remote_oob_extended_data_request_reply, &connection->address, c_192, r_192, c_256, r_256); 5623 } else if (c_192 != zero){ 5624 hci_send_cmd(&hci_remote_oob_data_request_reply, &connection->address, c_192, r_192); 5625 } else { 5626 hci_stack->classic_oob_con_handle = connection->con_handle; 5627 hci_send_cmd(&hci_remote_oob_data_request_negative_reply, &connection->address); 5628 } 5629 return true; 5630 } 5631 #endif 5632 5633 if (connection->authentication_flags & AUTH_FLAG_SEND_USER_CONFIRM_REPLY){ 5634 connectionClearAuthenticationFlags(connection, AUTH_FLAG_SEND_USER_CONFIRM_REPLY); 5635 hci_send_cmd(&hci_user_confirmation_request_reply, &connection->address); 5636 return true; 5637 } 5638 5639 if (connection->authentication_flags & AUTH_FLAG_SEND_USER_CONFIRM_NEGATIVE_REPLY){ 5640 connectionClearAuthenticationFlags(connection, AUTH_FLAG_SEND_USER_CONFIRM_NEGATIVE_REPLY); 5641 hci_send_cmd(&hci_user_confirmation_request_negative_reply, &connection->address); 5642 return true; 5643 } 5644 5645 if (connection->authentication_flags & AUTH_FLAG_SEND_USER_PASSKEY_REPLY){ 5646 connectionClearAuthenticationFlags(connection, AUTH_FLAG_SEND_USER_PASSKEY_REPLY); 5647 hci_send_cmd(&hci_user_passkey_request_reply, &connection->address, 000000); 5648 return true; 5649 } 5650 5651 if (connection->bonding_flags & BONDING_DISCONNECT_DEDICATED_DONE){ 5652 connection->bonding_flags &= ~BONDING_DISCONNECT_DEDICATED_DONE; 5653 connection->bonding_flags |= BONDING_EMIT_COMPLETE_ON_DISCONNECT; 5654 connection->state = SENT_DISCONNECT; 5655 hci_send_cmd(&hci_disconnect, connection->con_handle, ERROR_CODE_REMOTE_USER_TERMINATED_CONNECTION); 5656 return true; 5657 } 5658 5659 if ((connection->bonding_flags & BONDING_SEND_AUTHENTICATE_REQUEST) && ((connection->bonding_flags & BONDING_RECEIVED_REMOTE_FEATURES) != 0)){ 5660 connection->bonding_flags &= ~BONDING_SEND_AUTHENTICATE_REQUEST; 5661 connection->bonding_flags |= BONDING_SENT_AUTHENTICATE_REQUEST; 5662 hci_send_cmd(&hci_authentication_requested, connection->con_handle); 5663 return true; 5664 } 5665 5666 if (connection->bonding_flags & BONDING_SEND_ENCRYPTION_REQUEST){ 5667 connection->bonding_flags &= ~BONDING_SEND_ENCRYPTION_REQUEST; 5668 hci_send_cmd(&hci_set_connection_encryption, connection->con_handle, 1); 5669 return true; 5670 } 5671 5672 if (connection->bonding_flags & BONDING_SEND_READ_ENCRYPTION_KEY_SIZE){ 5673 connection->bonding_flags &= ~BONDING_SEND_READ_ENCRYPTION_KEY_SIZE; 5674 hci_send_cmd(&hci_read_encryption_key_size, connection->con_handle, 1); 5675 return true; 5676 } 5677 5678 if (connection->bonding_flags & BONDING_REQUEST_REMOTE_FEATURES_PAGE_0){ 5679 connection->bonding_flags &= ~BONDING_REQUEST_REMOTE_FEATURES_PAGE_0; 5680 hci_send_cmd(&hci_read_remote_supported_features_command, connection->con_handle); 5681 return true; 5682 } 5683 5684 if (connection->bonding_flags & BONDING_REQUEST_REMOTE_FEATURES_PAGE_1){ 5685 connection->bonding_flags &= ~BONDING_REQUEST_REMOTE_FEATURES_PAGE_1; 5686 hci_send_cmd(&hci_read_remote_extended_features_command, connection->con_handle, 1); 5687 return true; 5688 } 5689 5690 if (connection->bonding_flags & BONDING_REQUEST_REMOTE_FEATURES_PAGE_2){ 5691 connection->bonding_flags &= ~BONDING_REQUEST_REMOTE_FEATURES_PAGE_2; 5692 hci_send_cmd(&hci_read_remote_extended_features_command, connection->con_handle, 2); 5693 return true; 5694 } 5695 #endif 5696 5697 if (connection->bonding_flags & BONDING_DISCONNECT_SECURITY_BLOCK){ 5698 connection->bonding_flags &= ~BONDING_DISCONNECT_SECURITY_BLOCK; 5699 #ifdef ENABLE_CLASSIC 5700 hci_pairing_complete(connection, ERROR_CODE_CONNECTION_REJECTED_DUE_TO_SECURITY_REASONS); 5701 #endif 5702 if (connection->state != SENT_DISCONNECT){ 5703 connection->state = SENT_DISCONNECT; 5704 hci_send_cmd(&hci_disconnect, connection->con_handle, ERROR_CODE_AUTHENTICATION_FAILURE); 5705 return true; 5706 } 5707 } 5708 5709 #ifdef ENABLE_CLASSIC 5710 uint16_t sniff_min_interval; 5711 switch (connection->sniff_min_interval){ 5712 case 0: 5713 break; 5714 case 0xffff: 5715 connection->sniff_min_interval = 0; 5716 hci_send_cmd(&hci_exit_sniff_mode, connection->con_handle); 5717 return true; 5718 default: 5719 sniff_min_interval = connection->sniff_min_interval; 5720 connection->sniff_min_interval = 0; 5721 hci_send_cmd(&hci_sniff_mode, connection->con_handle, connection->sniff_max_interval, sniff_min_interval, connection->sniff_attempt, connection->sniff_timeout); 5722 return true; 5723 } 5724 5725 if (connection->sniff_subrating_max_latency != 0xffff){ 5726 uint16_t max_latency = connection->sniff_subrating_max_latency; 5727 connection->sniff_subrating_max_latency = 0; 5728 hci_send_cmd(&hci_sniff_subrating, connection->con_handle, max_latency, connection->sniff_subrating_min_remote_timeout, connection->sniff_subrating_min_local_timeout); 5729 return true; 5730 } 5731 5732 if (connection->qos_service_type != HCI_SERVICE_TYPE_INVALID){ 5733 uint8_t service_type = (uint8_t) connection->qos_service_type; 5734 connection->qos_service_type = HCI_SERVICE_TYPE_INVALID; 5735 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); 5736 return true; 5737 } 5738 5739 if (connection->request_role != HCI_ROLE_INVALID){ 5740 hci_role_t role = connection->request_role; 5741 connection->request_role = HCI_ROLE_INVALID; 5742 hci_send_cmd(&hci_switch_role_command, connection->address, role); 5743 return true; 5744 } 5745 #endif 5746 5747 if (connection->gap_connection_tasks != 0){ 5748 #ifdef ENABLE_CLASSIC 5749 if ((connection->gap_connection_tasks & GAP_CONNECTION_TASK_WRITE_AUTOMATIC_FLUSH_TIMEOUT) != 0){ 5750 connection->gap_connection_tasks &= ~GAP_CONNECTION_TASK_WRITE_AUTOMATIC_FLUSH_TIMEOUT; 5751 hci_send_cmd(&hci_write_automatic_flush_timeout, connection->con_handle, hci_stack->automatic_flush_timeout); 5752 return true; 5753 } 5754 if (connection->gap_connection_tasks & GAP_CONNECTION_TASK_WRITE_SUPERVISION_TIMEOUT){ 5755 connection->gap_connection_tasks &= ~GAP_CONNECTION_TASK_WRITE_SUPERVISION_TIMEOUT; 5756 hci_send_cmd(&hci_write_link_supervision_timeout, connection->con_handle, hci_stack->link_supervision_timeout); 5757 return true; 5758 } 5759 #endif 5760 if (connection->gap_connection_tasks & GAP_CONNECTION_TASK_READ_RSSI){ 5761 connection->gap_connection_tasks &= ~GAP_CONNECTION_TASK_READ_RSSI; 5762 hci_send_cmd(&hci_read_rssi, connection->con_handle); 5763 return true; 5764 } 5765 } 5766 5767 #ifdef ENABLE_BLE 5768 switch (connection->le_con_parameter_update_state){ 5769 // response to L2CAP CON PARAMETER UPDATE REQUEST 5770 case CON_PARAMETER_UPDATE_CHANGE_HCI_CON_PARAMETERS: 5771 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NONE; 5772 hci_send_cmd(&hci_le_connection_update, connection->con_handle, connection->le_conn_interval_min, 5773 connection->le_conn_interval_max, connection->le_conn_latency, connection->le_supervision_timeout, 5774 0x0000, 0xffff); 5775 return true; 5776 case CON_PARAMETER_UPDATE_REPLY: 5777 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NONE; 5778 hci_send_cmd(&hci_le_remote_connection_parameter_request_reply, connection->con_handle, connection->le_conn_interval_min, 5779 connection->le_conn_interval_max, connection->le_conn_latency, connection->le_supervision_timeout, 5780 0x0000, 0xffff); 5781 return true; 5782 case CON_PARAMETER_UPDATE_NEGATIVE_REPLY: 5783 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NONE; 5784 hci_send_cmd(&hci_le_remote_connection_parameter_request_negative_reply, ERROR_CODE_UNSUPPORTED_LMP_PARAMETER_VALUE_UNSUPPORTED_LL_PARAMETER_VALUE); 5785 return true; 5786 default: 5787 break; 5788 } 5789 if (connection->le_phy_update_all_phys != 0xffu){ 5790 uint8_t all_phys = connection->le_phy_update_all_phys; 5791 connection->le_phy_update_all_phys = 0xff; 5792 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); 5793 return true; 5794 } 5795 #endif 5796 } 5797 return false; 5798 } 5799 5800 static void hci_run(void){ 5801 5802 // stack state sub statemachines 5803 // halting needs to be called even if we cannot send command packet now 5804 switch (hci_stack->state) { 5805 case HCI_STATE_INITIALIZING: 5806 hci_initializing_run(); 5807 break; 5808 case HCI_STATE_HALTING: 5809 hci_halting_run(); 5810 break; 5811 case HCI_STATE_FALLING_ASLEEP: 5812 hci_falling_asleep_run(); 5813 break; 5814 default: 5815 break; 5816 } 5817 5818 bool done; 5819 5820 // send continuation fragments first, as they block the prepared packet buffer 5821 done = hci_run_acl_fragments(); 5822 if (done) return; 5823 5824 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 5825 // send host num completed packets next as they don't require num_cmd_packets > 0 5826 if (!hci_can_send_comand_packet_transport()) return; 5827 if (hci_stack->host_completed_packets){ 5828 hci_host_num_completed_packets(); 5829 return; 5830 } 5831 #endif 5832 5833 if (!hci_can_send_command_packet_now()) return; 5834 5835 // global/non-connection oriented commands 5836 5837 5838 #ifdef ENABLE_CLASSIC 5839 // general gap classic 5840 done = hci_run_general_gap_classic(); 5841 if (done) return; 5842 #endif 5843 5844 #ifdef ENABLE_BLE 5845 // general gap le 5846 done = hci_run_general_gap_le(); 5847 if (done) return; 5848 #endif 5849 5850 // send pending HCI commands 5851 hci_run_general_pending_commands(); 5852 } 5853 5854 uint8_t hci_send_cmd_packet(uint8_t *packet, int size){ 5855 // house-keeping 5856 5857 #ifdef ENABLE_CLASSIC 5858 bd_addr_t addr; 5859 hci_connection_t * conn; 5860 #endif 5861 #ifdef ENABLE_LE_CENTRAL 5862 uint8_t initiator_filter_policy; 5863 #endif 5864 5865 uint16_t opcode = little_endian_read_16(packet, 0); 5866 switch (opcode) { 5867 case HCI_OPCODE_HCI_WRITE_LOOPBACK_MODE: 5868 hci_stack->loopback_mode = packet[3]; 5869 break; 5870 5871 #ifdef ENABLE_CLASSIC 5872 case HCI_OPCODE_HCI_CREATE_CONNECTION: 5873 reverse_bd_addr(&packet[3], addr); 5874 log_info("Create_connection to %s", bd_addr_to_str(addr)); 5875 5876 // CVE-2020-26555: reject outgoing connection to device with same BD ADDR 5877 if (memcmp(hci_stack->local_bd_addr, addr, 6) == 0) { 5878 hci_emit_connection_complete(addr, 0, ERROR_CODE_CONNECTION_REJECTED_DUE_TO_UNACCEPTABLE_BD_ADDR); 5879 return ERROR_CODE_CONNECTION_REJECTED_DUE_TO_UNACCEPTABLE_BD_ADDR; 5880 } 5881 5882 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 5883 if (!conn) { 5884 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 5885 if (!conn) { 5886 // notify client that alloc failed 5887 hci_emit_connection_complete(addr, 0, BTSTACK_MEMORY_ALLOC_FAILED); 5888 return BTSTACK_MEMORY_ALLOC_FAILED; // packet not sent to controller 5889 } 5890 conn->state = SEND_CREATE_CONNECTION; 5891 conn->role = HCI_ROLE_MASTER; 5892 } 5893 5894 conn->con_handle = HCI_CON_HANDLE_INVALID; 5895 conn->role = HCI_ROLE_INVALID; 5896 5897 log_info("conn state %u", conn->state); 5898 // TODO: L2CAP should not send create connection command, instead a (new) gap function should be used 5899 switch (conn->state) { 5900 // if connection active exists 5901 case OPEN: 5902 // and OPEN, emit connection complete command 5903 hci_emit_connection_complete(addr, conn->con_handle, ERROR_CODE_SUCCESS); 5904 // packet not sent to controller 5905 return ERROR_CODE_ACL_CONNECTION_ALREADY_EXISTS; 5906 case RECEIVED_DISCONNECTION_COMPLETE: 5907 // create connection triggered in disconnect complete event, let's do it now 5908 break; 5909 case SEND_CREATE_CONNECTION: 5910 #ifdef ENABLE_HCI_SERIALIZED_CONTROLLER_OPERATIONS 5911 if (hci_classic_operation_active()){ 5912 return ERROR_CODE_SUCCESS; 5913 } 5914 #endif 5915 // connection created by hci, e.g. dedicated bonding, but not executed yet, let's do it now 5916 break; 5917 default: 5918 // otherwise, just ignore as it is already in the open process 5919 // packet not sent to controller 5920 return ERROR_CODE_ACL_CONNECTION_ALREADY_EXISTS; 5921 } 5922 conn->state = SENT_CREATE_CONNECTION; 5923 5924 // track outgoing connection 5925 hci_stack->outgoing_addr_type = BD_ADDR_TYPE_ACL; 5926 (void) memcpy(hci_stack->outgoing_addr, addr, 6); 5927 break; 5928 5929 #if defined (ENABLE_SCO_OVER_HCI) || defined (HAVE_SCO_TRANSPORT) 5930 case HCI_OPCODE_HCI_SETUP_SYNCHRONOUS_CONNECTION: 5931 // setup_synchronous_connection? Voice setting at offset 22 5932 // TODO: compare to current setting if sco connection already active 5933 hci_stack->sco_voice_setting_active = little_endian_read_16(packet, 15); 5934 break; 5935 case HCI_OPCODE_HCI_ACCEPT_SYNCHRONOUS_CONNECTION: 5936 // accept_synchronous_connection? Voice setting at offset 18 5937 // TODO: compare to current setting if sco connection already active 5938 hci_stack->sco_voice_setting_active = little_endian_read_16(packet, 19); 5939 // track outgoing connection 5940 hci_stack->outgoing_addr_type = BD_ADDR_TYPE_SCO; 5941 reverse_bd_addr(&packet[3], hci_stack->outgoing_addr); 5942 break; 5943 #endif 5944 #endif 5945 5946 #ifdef ENABLE_BLE 5947 #ifdef ENABLE_LE_CENTRAL 5948 case HCI_OPCODE_HCI_LE_CREATE_CONNECTION: 5949 // white list used? 5950 initiator_filter_policy = packet[7]; 5951 switch (initiator_filter_policy) { 5952 case 0: 5953 // whitelist not used 5954 hci_stack->le_connecting_state = LE_CONNECTING_DIRECT; 5955 break; 5956 case 1: 5957 hci_stack->le_connecting_state = LE_CONNECTING_WHITELIST; 5958 break; 5959 default: 5960 log_error("Invalid initiator_filter_policy in LE Create Connection %u", initiator_filter_policy); 5961 break; 5962 } 5963 // track outgoing connection 5964 hci_stack->outgoing_addr_type = (bd_addr_type_t) packet[8]; // peer addres type 5965 reverse_bd_addr( &packet[9], hci_stack->outgoing_addr); // peer address 5966 break; 5967 case HCI_OPCODE_HCI_LE_CREATE_CONNECTION_CANCEL: 5968 hci_stack->le_connecting_state = LE_CONNECTING_CANCEL; 5969 break; 5970 #endif 5971 #endif 5972 default: 5973 break; 5974 } 5975 5976 hci_stack->num_cmd_packets--; 5977 5978 hci_dump_packet(HCI_COMMAND_DATA_PACKET, 0, packet, size); 5979 int err = hci_stack->hci_transport->send_packet(HCI_COMMAND_DATA_PACKET, packet, size); 5980 if (err != 0){ 5981 return ERROR_CODE_HARDWARE_FAILURE; 5982 } 5983 return ERROR_CODE_SUCCESS; 5984 } 5985 5986 // disconnect because of security block 5987 void hci_disconnect_security_block(hci_con_handle_t con_handle){ 5988 hci_connection_t * connection = hci_connection_for_handle(con_handle); 5989 if (!connection) return; 5990 connection->bonding_flags |= BONDING_DISCONNECT_SECURITY_BLOCK; 5991 } 5992 5993 5994 // Configure Secure Simple Pairing 5995 5996 #ifdef ENABLE_CLASSIC 5997 5998 // enable will enable SSP during init 5999 void gap_ssp_set_enable(int enable){ 6000 hci_stack->ssp_enable = enable; 6001 } 6002 6003 static int hci_local_ssp_activated(void){ 6004 return gap_ssp_supported() && hci_stack->ssp_enable; 6005 } 6006 6007 // if set, BTstack will respond to io capability request using authentication requirement 6008 void gap_ssp_set_io_capability(int io_capability){ 6009 hci_stack->ssp_io_capability = io_capability; 6010 } 6011 void gap_ssp_set_authentication_requirement(int authentication_requirement){ 6012 hci_stack->ssp_authentication_requirement = authentication_requirement; 6013 } 6014 6015 // if set, BTstack will confirm a numberic comparion and enter '000000' if requested 6016 void gap_ssp_set_auto_accept(int auto_accept){ 6017 hci_stack->ssp_auto_accept = auto_accept; 6018 } 6019 6020 void gap_secure_connections_enable(bool enable){ 6021 hci_stack->secure_connections_enable = enable; 6022 } 6023 6024 #endif 6025 6026 // va_list part of hci_send_cmd 6027 uint8_t hci_send_cmd_va_arg(const hci_cmd_t * cmd, va_list argptr){ 6028 if (!hci_can_send_command_packet_now()){ 6029 log_error("hci_send_cmd called but cannot send packet now"); 6030 return ERROR_CODE_COMMAND_DISALLOWED; 6031 } 6032 6033 // for HCI INITIALIZATION 6034 // log_info("hci_send_cmd: opcode %04x", cmd->opcode); 6035 hci_stack->last_cmd_opcode = cmd->opcode; 6036 6037 hci_reserve_packet_buffer(); 6038 uint8_t * packet = hci_stack->hci_packet_buffer; 6039 uint16_t size = hci_cmd_create_from_template(packet, cmd, argptr); 6040 uint8_t status = hci_send_cmd_packet(packet, size); 6041 6042 // release packet buffer on error or for synchronous transport implementations 6043 if ((status != ERROR_CODE_SUCCESS) || hci_transport_synchronous()){ 6044 hci_release_packet_buffer(); 6045 hci_emit_transport_packet_sent(); 6046 } 6047 6048 return status; 6049 } 6050 6051 /** 6052 * pre: numcmds >= 0 - it's allowed to send a command to the controller 6053 */ 6054 uint8_t hci_send_cmd(const hci_cmd_t * cmd, ...){ 6055 va_list argptr; 6056 va_start(argptr, cmd); 6057 uint8_t status = hci_send_cmd_va_arg(cmd, argptr); 6058 va_end(argptr); 6059 return status; 6060 } 6061 6062 // Create various non-HCI events. 6063 // TODO: generalize, use table similar to hci_create_command 6064 6065 static void hci_emit_event(uint8_t * event, uint16_t size, int dump){ 6066 // dump packet 6067 if (dump) { 6068 hci_dump_packet( HCI_EVENT_PACKET, 0, event, size); 6069 } 6070 6071 // dispatch to all event handlers 6072 btstack_linked_list_iterator_t it; 6073 btstack_linked_list_iterator_init(&it, &hci_stack->event_handlers); 6074 while (btstack_linked_list_iterator_has_next(&it)){ 6075 btstack_packet_callback_registration_t * entry = (btstack_packet_callback_registration_t*) btstack_linked_list_iterator_next(&it); 6076 entry->callback(HCI_EVENT_PACKET, 0, event, size); 6077 } 6078 } 6079 6080 static void hci_emit_acl_packet(uint8_t * packet, uint16_t size){ 6081 if (!hci_stack->acl_packet_handler) return; 6082 hci_stack->acl_packet_handler(HCI_ACL_DATA_PACKET, 0, packet, size); 6083 } 6084 6085 #ifdef ENABLE_CLASSIC 6086 static void hci_notify_if_sco_can_send_now(void){ 6087 // notify SCO sender if waiting 6088 if (!hci_stack->sco_waiting_for_can_send_now) return; 6089 if (hci_can_send_sco_packet_now()){ 6090 hci_stack->sco_waiting_for_can_send_now = 0; 6091 uint8_t event[2] = { HCI_EVENT_SCO_CAN_SEND_NOW, 0 }; 6092 hci_dump_packet(HCI_EVENT_PACKET, 1, event, sizeof(event)); 6093 hci_stack->sco_packet_handler(HCI_EVENT_PACKET, 0, event, sizeof(event)); 6094 } 6095 } 6096 6097 // parsing end emitting has been merged to reduce code size 6098 static void gap_inquiry_explode(uint8_t *packet, uint16_t size) { 6099 uint8_t event[28+GAP_INQUIRY_MAX_NAME_LEN]; 6100 6101 uint8_t * eir_data; 6102 ad_context_t context; 6103 const uint8_t * name; 6104 uint8_t name_len; 6105 6106 if (size < 3) return; 6107 6108 int event_type = hci_event_packet_get_type(packet); 6109 int num_reserved_fields = (event_type == HCI_EVENT_INQUIRY_RESULT) ? 2 : 1; // 2 for old event, 1 otherwise 6110 int num_responses = hci_event_inquiry_result_get_num_responses(packet); 6111 6112 switch (event_type){ 6113 case HCI_EVENT_INQUIRY_RESULT: 6114 case HCI_EVENT_INQUIRY_RESULT_WITH_RSSI: 6115 if (size != (3 + (num_responses * 14))) return; 6116 break; 6117 case HCI_EVENT_EXTENDED_INQUIRY_RESPONSE: 6118 if (size != 257) return; 6119 if (num_responses != 1) return; 6120 break; 6121 default: 6122 return; 6123 } 6124 6125 // event[1] is set at the end 6126 int i; 6127 for (i=0; i<num_responses;i++){ 6128 memset(event, 0, sizeof(event)); 6129 event[0] = GAP_EVENT_INQUIRY_RESULT; 6130 uint8_t event_size = 27; // if name is not set by EIR 6131 6132 (void)memcpy(&event[2], &packet[3 + (i * 6)], 6); // bd_addr 6133 event[8] = packet[3 + (num_responses*(6)) + (i*1)]; // page_scan_repetition_mode 6134 (void)memcpy(&event[9], 6135 &packet[3 + (num_responses * (6 + 1 + num_reserved_fields)) + (i * 3)], 6136 3); // class of device 6137 (void)memcpy(&event[12], 6138 &packet[3 + (num_responses * (6 + 1 + num_reserved_fields + 3)) + (i * 2)], 6139 2); // clock offset 6140 6141 switch (event_type){ 6142 case HCI_EVENT_INQUIRY_RESULT: 6143 // 14,15,16,17 = 0, size 18 6144 break; 6145 case HCI_EVENT_INQUIRY_RESULT_WITH_RSSI: 6146 event[14] = 1; 6147 event[15] = packet [3 + (num_responses*(6+1+num_reserved_fields+3+2)) + (i*1)]; // rssi 6148 // 16,17 = 0, size 18 6149 break; 6150 case HCI_EVENT_EXTENDED_INQUIRY_RESPONSE: 6151 event[14] = 1; 6152 event[15] = packet [3 + (num_responses*(6+1+num_reserved_fields+3+2)) + (i*1)]; // rssi 6153 // EIR packets only contain a single inquiry response 6154 eir_data = &packet[3 + (6+1+num_reserved_fields+3+2+1)]; 6155 name = NULL; 6156 // Iterate over EIR data 6157 for (ad_iterator_init(&context, EXTENDED_INQUIRY_RESPONSE_DATA_LEN, eir_data) ; ad_iterator_has_more(&context) ; ad_iterator_next(&context)){ 6158 uint8_t data_type = ad_iterator_get_data_type(&context); 6159 uint8_t data_size = ad_iterator_get_data_len(&context); 6160 const uint8_t * data = ad_iterator_get_data(&context); 6161 // Prefer Complete Local Name over Shortened Local Name 6162 switch (data_type){ 6163 case BLUETOOTH_DATA_TYPE_SHORTENED_LOCAL_NAME: 6164 if (name) continue; 6165 /* fall through */ 6166 case BLUETOOTH_DATA_TYPE_COMPLETE_LOCAL_NAME: 6167 name = data; 6168 name_len = data_size; 6169 break; 6170 case BLUETOOTH_DATA_TYPE_DEVICE_ID: 6171 if (data_size != 8) break; 6172 event[16] = 1; 6173 memcpy(&event[17], data, 8); 6174 break; 6175 default: 6176 break; 6177 } 6178 } 6179 if (name){ 6180 event[25] = 1; 6181 // truncate name if needed 6182 int len = btstack_min(name_len, GAP_INQUIRY_MAX_NAME_LEN); 6183 event[26] = len; 6184 (void)memcpy(&event[27], name, len); 6185 event_size += len; 6186 } 6187 break; 6188 default: 6189 return; 6190 } 6191 event[1] = event_size - 2; 6192 hci_emit_event(event, event_size, 1); 6193 } 6194 } 6195 #endif 6196 6197 void hci_emit_state(void){ 6198 log_info("BTSTACK_EVENT_STATE %u", hci_stack->state); 6199 uint8_t event[3]; 6200 event[0] = BTSTACK_EVENT_STATE; 6201 event[1] = sizeof(event) - 2u; 6202 event[2] = hci_stack->state; 6203 hci_emit_event(event, sizeof(event), 1); 6204 } 6205 6206 #ifdef ENABLE_CLASSIC 6207 static void hci_emit_connection_complete(bd_addr_t address, hci_con_handle_t con_handle, uint8_t status){ 6208 uint8_t event[13]; 6209 event[0] = HCI_EVENT_CONNECTION_COMPLETE; 6210 event[1] = sizeof(event) - 2; 6211 event[2] = status; 6212 little_endian_store_16(event, 3, con_handle); 6213 reverse_bd_addr(address, &event[5]); 6214 event[11] = 1; // ACL connection 6215 event[12] = 0; // encryption disabled 6216 hci_emit_event(event, sizeof(event), 1); 6217 } 6218 static void hci_emit_l2cap_check_timeout(hci_connection_t *conn){ 6219 if (disable_l2cap_timeouts) return; 6220 log_info("L2CAP_EVENT_TIMEOUT_CHECK"); 6221 uint8_t event[4]; 6222 event[0] = L2CAP_EVENT_TIMEOUT_CHECK; 6223 event[1] = sizeof(event) - 2; 6224 little_endian_store_16(event, 2, conn->con_handle); 6225 hci_emit_event(event, sizeof(event), 1); 6226 } 6227 #endif 6228 6229 #ifdef ENABLE_BLE 6230 #ifdef ENABLE_LE_CENTRAL 6231 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){ 6232 uint8_t event[21]; 6233 event[0] = HCI_EVENT_LE_META; 6234 event[1] = sizeof(event) - 2u; 6235 event[2] = HCI_SUBEVENT_LE_CONNECTION_COMPLETE; 6236 event[3] = status; 6237 little_endian_store_16(event, 4, con_handle); 6238 event[6] = 0; // TODO: role 6239 event[7] = address_type; 6240 reverse_bd_addr(address, &event[8]); 6241 little_endian_store_16(event, 14, 0); // interval 6242 little_endian_store_16(event, 16, 0); // latency 6243 little_endian_store_16(event, 18, 0); // supervision timeout 6244 event[20] = 0; // master clock accuracy 6245 hci_emit_event(event, sizeof(event), 1); 6246 } 6247 #endif 6248 #endif 6249 6250 static void hci_emit_transport_packet_sent(void){ 6251 // notify upper stack that it might be possible to send again 6252 uint8_t event[] = { HCI_EVENT_TRANSPORT_PACKET_SENT, 0}; 6253 hci_emit_event(&event[0], sizeof(event), 0); // don't dump 6254 } 6255 6256 static void hci_emit_disconnection_complete(hci_con_handle_t con_handle, uint8_t reason){ 6257 uint8_t event[6]; 6258 event[0] = HCI_EVENT_DISCONNECTION_COMPLETE; 6259 event[1] = sizeof(event) - 2u; 6260 event[2] = 0; // status = OK 6261 little_endian_store_16(event, 3, con_handle); 6262 event[5] = reason; 6263 hci_emit_event(event, sizeof(event), 1); 6264 } 6265 6266 static void hci_emit_nr_connections_changed(void){ 6267 log_info("BTSTACK_EVENT_NR_CONNECTIONS_CHANGED %u", nr_hci_connections()); 6268 uint8_t event[3]; 6269 event[0] = BTSTACK_EVENT_NR_CONNECTIONS_CHANGED; 6270 event[1] = sizeof(event) - 2u; 6271 event[2] = nr_hci_connections(); 6272 hci_emit_event(event, sizeof(event), 1); 6273 } 6274 6275 static void hci_emit_hci_open_failed(void){ 6276 log_info("BTSTACK_EVENT_POWERON_FAILED"); 6277 uint8_t event[2]; 6278 event[0] = BTSTACK_EVENT_POWERON_FAILED; 6279 event[1] = sizeof(event) - 2u; 6280 hci_emit_event(event, sizeof(event), 1); 6281 } 6282 6283 static void hci_emit_dedicated_bonding_result(bd_addr_t address, uint8_t status){ 6284 log_info("hci_emit_dedicated_bonding_result %u ", status); 6285 uint8_t event[9]; 6286 int pos = 0; 6287 event[pos++] = GAP_EVENT_DEDICATED_BONDING_COMPLETED; 6288 event[pos++] = sizeof(event) - 2u; 6289 event[pos++] = status; 6290 reverse_bd_addr(address, &event[pos]); 6291 hci_emit_event(event, sizeof(event), 1); 6292 } 6293 6294 6295 #ifdef ENABLE_CLASSIC 6296 6297 static void hci_emit_security_level(hci_con_handle_t con_handle, gap_security_level_t level){ 6298 log_info("hci_emit_security_level %u for handle %x", level, con_handle); 6299 uint8_t event[5]; 6300 int pos = 0; 6301 event[pos++] = GAP_EVENT_SECURITY_LEVEL; 6302 event[pos++] = sizeof(event) - 2; 6303 little_endian_store_16(event, 2, con_handle); 6304 pos += 2; 6305 event[pos++] = level; 6306 hci_emit_event(event, sizeof(event), 1); 6307 } 6308 6309 static gap_security_level_t gap_security_level_for_connection(hci_connection_t * connection){ 6310 if (!connection) return LEVEL_0; 6311 if ((connection->authentication_flags & AUTH_FLAG_CONNECTION_ENCRYPTED) == 0) return LEVEL_0; 6312 // BIAS: we only consider Authenticated if the connection is already encrypted, which requires that both sides have link key 6313 if ((connection->authentication_flags & AUTH_FLAG_CONNECTION_AUTHENTICATED) == 0) return LEVEL_0; 6314 if (connection->encryption_key_size < hci_stack->gap_required_encyrption_key_size) return LEVEL_0; 6315 gap_security_level_t security_level = gap_security_level_for_link_key_type(connection->link_key_type); 6316 // LEVEL 4 always requires 128 bit encrytion key size 6317 if ((security_level == LEVEL_4) && (connection->encryption_key_size < 16)){ 6318 security_level = LEVEL_3; 6319 } 6320 return security_level; 6321 } 6322 6323 static void hci_emit_discoverable_enabled(uint8_t enabled){ 6324 log_info("BTSTACK_EVENT_DISCOVERABLE_ENABLED %u", enabled); 6325 uint8_t event[3]; 6326 event[0] = BTSTACK_EVENT_DISCOVERABLE_ENABLED; 6327 event[1] = sizeof(event) - 2; 6328 event[2] = enabled; 6329 hci_emit_event(event, sizeof(event), 1); 6330 } 6331 6332 // query if remote side supports eSCO 6333 bool hci_remote_esco_supported(hci_con_handle_t con_handle){ 6334 hci_connection_t * connection = hci_connection_for_handle(con_handle); 6335 if (!connection) return false; 6336 return (connection->remote_supported_features[0] & 1) != 0; 6337 } 6338 6339 static bool hci_ssp_supported(hci_connection_t * connection){ 6340 const uint8_t mask = BONDING_REMOTE_SUPPORTS_SSP_CONTROLLER | BONDING_REMOTE_SUPPORTS_SSP_HOST; 6341 return (connection->bonding_flags & mask) == mask; 6342 } 6343 6344 // query if remote side supports SSP 6345 bool hci_remote_ssp_supported(hci_con_handle_t con_handle){ 6346 hci_connection_t * connection = hci_connection_for_handle(con_handle); 6347 if (!connection) return false; 6348 return hci_ssp_supported(connection) ? 1 : 0; 6349 } 6350 6351 bool gap_ssp_supported_on_both_sides(hci_con_handle_t handle){ 6352 return hci_local_ssp_activated() && hci_remote_ssp_supported(handle); 6353 } 6354 6355 /** 6356 * Check if remote supported features query has completed 6357 */ 6358 bool hci_remote_features_available(hci_con_handle_t handle){ 6359 hci_connection_t * connection = hci_connection_for_handle(handle); 6360 if (!connection) return false; 6361 return (connection->bonding_flags & BONDING_RECEIVED_REMOTE_FEATURES) != 0; 6362 } 6363 6364 /** 6365 * Trigger remote supported features query 6366 */ 6367 6368 static void hci_trigger_remote_features_for_connection(hci_connection_t * connection){ 6369 if ((connection->bonding_flags & (BONDING_REMOTE_FEATURES_QUERY_ACTIVE | BONDING_RECEIVED_REMOTE_FEATURES)) == 0){ 6370 connection->bonding_flags |= BONDING_REMOTE_FEATURES_QUERY_ACTIVE | BONDING_REQUEST_REMOTE_FEATURES_PAGE_0; 6371 } 6372 } 6373 6374 void hci_remote_features_query(hci_con_handle_t con_handle){ 6375 hci_connection_t * connection = hci_connection_for_handle(con_handle); 6376 if (!connection) return; 6377 hci_trigger_remote_features_for_connection(connection); 6378 hci_run(); 6379 } 6380 6381 // GAP API 6382 /** 6383 * @bbrief enable/disable bonding. default is enabled 6384 * @praram enabled 6385 */ 6386 void gap_set_bondable_mode(int enable){ 6387 hci_stack->bondable = enable ? 1 : 0; 6388 } 6389 /** 6390 * @brief Get bondable mode. 6391 * @return 1 if bondable 6392 */ 6393 int gap_get_bondable_mode(void){ 6394 return hci_stack->bondable; 6395 } 6396 6397 /** 6398 * @brief map link keys to security levels 6399 */ 6400 gap_security_level_t gap_security_level_for_link_key_type(link_key_type_t link_key_type){ 6401 switch (link_key_type){ 6402 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P256: 6403 return LEVEL_4; 6404 case COMBINATION_KEY: 6405 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P192: 6406 return LEVEL_3; 6407 default: 6408 return LEVEL_2; 6409 } 6410 } 6411 6412 /** 6413 * @brief map link keys to secure connection yes/no 6414 */ 6415 bool gap_secure_connection_for_link_key_type(link_key_type_t link_key_type){ 6416 switch (link_key_type){ 6417 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P256: 6418 case UNAUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P256: 6419 return true; 6420 default: 6421 return false; 6422 } 6423 } 6424 6425 /** 6426 * @brief map link keys to authenticated 6427 */ 6428 bool gap_authenticated_for_link_key_type(link_key_type_t link_key_type){ 6429 switch (link_key_type){ 6430 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P256: 6431 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P192: 6432 return true; 6433 default: 6434 return false; 6435 } 6436 } 6437 6438 bool gap_mitm_protection_required_for_security_level(gap_security_level_t level){ 6439 log_info("gap_mitm_protection_required_for_security_level %u", level); 6440 return level > LEVEL_2; 6441 } 6442 6443 /** 6444 * @brief get current security level 6445 */ 6446 gap_security_level_t gap_security_level(hci_con_handle_t con_handle){ 6447 hci_connection_t * connection = hci_connection_for_handle(con_handle); 6448 if (!connection) return LEVEL_0; 6449 return gap_security_level_for_connection(connection); 6450 } 6451 6452 /** 6453 * @brief request connection to device to 6454 * @result GAP_AUTHENTICATION_RESULT 6455 */ 6456 void gap_request_security_level(hci_con_handle_t con_handle, gap_security_level_t requested_level){ 6457 hci_connection_t * connection = hci_connection_for_handle(con_handle); 6458 if (!connection){ 6459 hci_emit_security_level(con_handle, LEVEL_0); 6460 return; 6461 } 6462 6463 btstack_assert(hci_is_le_connection(connection) == false); 6464 6465 // 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) 6466 // available on the BR/EDR physical transport require Security Mode 4, Level 4 " 6467 if (hci_stack->gap_secure_connections_only_mode && (requested_level != LEVEL_0)){ 6468 requested_level = LEVEL_4; 6469 } 6470 6471 gap_security_level_t current_level = gap_security_level(con_handle); 6472 log_info("gap_request_security_level requested level %u, planned level %u, current level %u", 6473 requested_level, connection->requested_security_level, current_level); 6474 6475 // authentication active if authentication request was sent or planned level > 0 6476 bool authentication_active = ((connection->bonding_flags & BONDING_SENT_AUTHENTICATE_REQUEST) != 0) || (connection->requested_security_level > LEVEL_0); 6477 if (authentication_active){ 6478 // authentication already active 6479 if (connection->requested_security_level < requested_level){ 6480 // increase requested level as new level is higher 6481 // TODO: handle re-authentication when done 6482 connection->requested_security_level = requested_level; 6483 } 6484 } else { 6485 // no request active, notify if security sufficient 6486 if (requested_level <= current_level){ 6487 hci_emit_security_level(con_handle, current_level); 6488 return; 6489 } 6490 6491 // store request 6492 connection->requested_security_level = requested_level; 6493 6494 // request remote features if not already active 6495 hci_remote_features_query(con_handle); 6496 6497 // start to authenticate connection 6498 connection->bonding_flags |= BONDING_SEND_AUTHENTICATE_REQUEST; 6499 hci_run(); 6500 } 6501 } 6502 6503 /** 6504 * @brief start dedicated bonding with device. disconnect after bonding 6505 * @param device 6506 * @param request MITM protection 6507 * @result GAP_DEDICATED_BONDING_COMPLETE 6508 */ 6509 int gap_dedicated_bonding(bd_addr_t device, int mitm_protection_required){ 6510 6511 // create connection state machine 6512 hci_connection_t * connection = create_connection_for_bd_addr_and_type(device, BD_ADDR_TYPE_ACL); 6513 6514 if (!connection){ 6515 return BTSTACK_MEMORY_ALLOC_FAILED; 6516 } 6517 6518 // delete linkn key 6519 gap_drop_link_key_for_bd_addr(device); 6520 6521 // configure LEVEL_2/3, dedicated bonding 6522 connection->state = SEND_CREATE_CONNECTION; 6523 connection->requested_security_level = mitm_protection_required ? LEVEL_3 : LEVEL_2; 6524 log_info("gap_dedicated_bonding, mitm %d -> level %u", mitm_protection_required, connection->requested_security_level); 6525 connection->bonding_flags = BONDING_DEDICATED; 6526 6527 // wait for GAP Security Result and send GAP Dedicated Bonding complete 6528 6529 // handle: connnection failure (connection complete != ok) 6530 // handle: authentication failure 6531 // handle: disconnect on done 6532 6533 hci_run(); 6534 6535 return 0; 6536 } 6537 6538 void gap_set_local_name(const char * local_name){ 6539 hci_stack->local_name = local_name; 6540 hci_stack->gap_tasks_classic |= GAP_TASK_SET_LOCAL_NAME; 6541 // also update EIR if not set by user 6542 if (hci_stack->eir_data == NULL){ 6543 hci_stack->gap_tasks_classic |= GAP_TASK_SET_EIR_DATA; 6544 } 6545 hci_run(); 6546 } 6547 #endif 6548 6549 6550 #ifdef ENABLE_BLE 6551 6552 #ifdef ENABLE_LE_CENTRAL 6553 void gap_start_scan(void){ 6554 hci_stack->le_scanning_enabled = true; 6555 hci_run(); 6556 } 6557 6558 void gap_stop_scan(void){ 6559 hci_stack->le_scanning_enabled = false; 6560 hci_run(); 6561 } 6562 6563 void gap_set_scan_params(uint8_t scan_type, uint16_t scan_interval, uint16_t scan_window, uint8_t scanning_filter_policy){ 6564 hci_stack->le_scan_type = scan_type; 6565 hci_stack->le_scan_filter_policy = scanning_filter_policy; 6566 hci_stack->le_scan_interval = scan_interval; 6567 hci_stack->le_scan_window = scan_window; 6568 hci_stack->le_scanning_param_update = true; 6569 hci_run(); 6570 } 6571 6572 void gap_set_scan_parameters(uint8_t scan_type, uint16_t scan_interval, uint16_t scan_window){ 6573 gap_set_scan_params(scan_type, scan_interval, scan_window, 0); 6574 } 6575 6576 uint8_t gap_connect(const bd_addr_t addr, bd_addr_type_t addr_type){ 6577 hci_connection_t * conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 6578 if (!conn){ 6579 // disallow if le connection is already outgoing 6580 if (hci_is_le_connection_type(addr_type) && hci_stack->le_connecting_request != LE_CONNECTING_IDLE){ 6581 log_error("le connection already active"); 6582 return ERROR_CODE_COMMAND_DISALLOWED; 6583 } 6584 6585 log_info("gap_connect: no connection exists yet, creating context"); 6586 conn = create_connection_for_bd_addr_and_type(addr, addr_type); 6587 if (!conn){ 6588 // notify client that alloc failed 6589 hci_emit_le_connection_complete(addr_type, addr, 0, BTSTACK_MEMORY_ALLOC_FAILED); 6590 log_info("gap_connect: failed to alloc hci_connection_t"); 6591 return GATT_CLIENT_NOT_CONNECTED; // don't sent packet to controller 6592 } 6593 6594 // set le connecting state 6595 if (hci_is_le_connection_type(addr_type)){ 6596 hci_stack->le_connecting_request = LE_CONNECTING_DIRECT; 6597 } 6598 6599 conn->state = SEND_CREATE_CONNECTION; 6600 log_info("gap_connect: send create connection next"); 6601 hci_run(); 6602 return ERROR_CODE_SUCCESS; 6603 } 6604 6605 if (!hci_is_le_connection(conn) || 6606 (conn->state == SEND_CREATE_CONNECTION) || 6607 (conn->state == SENT_CREATE_CONNECTION)) { 6608 hci_emit_le_connection_complete(conn->address_type, conn->address, 0, ERROR_CODE_COMMAND_DISALLOWED); 6609 log_error("gap_connect: classic connection or connect is already being created"); 6610 return GATT_CLIENT_IN_WRONG_STATE; 6611 } 6612 6613 // check if connection was just disconnected 6614 if (conn->state == RECEIVED_DISCONNECTION_COMPLETE){ 6615 log_info("gap_connect: send create connection (again)"); 6616 conn->state = SEND_CREATE_CONNECTION; 6617 hci_run(); 6618 return ERROR_CODE_SUCCESS; 6619 } 6620 6621 log_info("gap_connect: context exists with state %u", conn->state); 6622 hci_emit_le_connection_complete(conn->address_type, conn->address, conn->con_handle, ERROR_CODE_SUCCESS); 6623 hci_run(); 6624 return ERROR_CODE_SUCCESS; 6625 } 6626 6627 // @assumption: only a single outgoing LE Connection exists 6628 static hci_connection_t * gap_get_outgoing_connection(void){ 6629 btstack_linked_item_t *it; 6630 for (it = (btstack_linked_item_t *) hci_stack->connections; it != NULL; it = it->next){ 6631 hci_connection_t * conn = (hci_connection_t *) it; 6632 if (!hci_is_le_connection(conn)) continue; 6633 switch (conn->state){ 6634 case SEND_CREATE_CONNECTION: 6635 case SENT_CREATE_CONNECTION: 6636 case SENT_CANCEL_CONNECTION: 6637 return conn; 6638 default: 6639 break; 6640 }; 6641 } 6642 return NULL; 6643 } 6644 6645 uint8_t gap_connect_cancel(void){ 6646 hci_connection_t * conn = gap_get_outgoing_connection(); 6647 if (!conn) return 0; 6648 switch (conn->state){ 6649 case SEND_CREATE_CONNECTION: 6650 // skip sending create connection and emit event instead 6651 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 6652 hci_emit_le_connection_complete(conn->address_type, conn->address, 0, ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER); 6653 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 6654 btstack_memory_hci_connection_free( conn ); 6655 break; 6656 case SENT_CREATE_CONNECTION: 6657 // request to send cancel connection 6658 conn->state = SEND_CANCEL_CONNECTION; 6659 hci_run(); 6660 break; 6661 default: 6662 break; 6663 } 6664 return 0; 6665 } 6666 6667 /** 6668 * @brief Set connection parameters for outgoing connections 6669 * @param conn_scan_interval (unit: 0.625 msec), default: 60 ms 6670 * @param conn_scan_window (unit: 0.625 msec), default: 30 ms 6671 * @param conn_interval_min (unit: 1.25ms), default: 10 ms 6672 * @param conn_interval_max (unit: 1.25ms), default: 30 ms 6673 * @param conn_latency, default: 4 6674 * @param supervision_timeout (unit: 10ms), default: 720 ms 6675 * @param min_ce_length (unit: 0.625ms), default: 10 ms 6676 * @param max_ce_length (unit: 0.625ms), default: 30 ms 6677 */ 6678 6679 void gap_set_connection_parameters(uint16_t conn_scan_interval, uint16_t conn_scan_window, 6680 uint16_t conn_interval_min, uint16_t conn_interval_max, uint16_t conn_latency, 6681 uint16_t supervision_timeout, uint16_t min_ce_length, uint16_t max_ce_length){ 6682 hci_stack->le_connection_scan_interval = conn_scan_interval; 6683 hci_stack->le_connection_scan_window = conn_scan_window; 6684 hci_stack->le_connection_interval_min = conn_interval_min; 6685 hci_stack->le_connection_interval_max = conn_interval_max; 6686 hci_stack->le_connection_latency = conn_latency; 6687 hci_stack->le_supervision_timeout = supervision_timeout; 6688 hci_stack->le_minimum_ce_length = min_ce_length; 6689 hci_stack->le_maximum_ce_length = max_ce_length; 6690 } 6691 #endif 6692 6693 /** 6694 * @brief Updates the connection parameters for a given LE connection 6695 * @param handle 6696 * @param conn_interval_min (unit: 1.25ms) 6697 * @param conn_interval_max (unit: 1.25ms) 6698 * @param conn_latency 6699 * @param supervision_timeout (unit: 10ms) 6700 * @return 0 if ok 6701 */ 6702 int gap_update_connection_parameters(hci_con_handle_t con_handle, uint16_t conn_interval_min, 6703 uint16_t conn_interval_max, uint16_t conn_latency, uint16_t supervision_timeout){ 6704 hci_connection_t * connection = hci_connection_for_handle(con_handle); 6705 if (!connection) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 6706 connection->le_conn_interval_min = conn_interval_min; 6707 connection->le_conn_interval_max = conn_interval_max; 6708 connection->le_conn_latency = conn_latency; 6709 connection->le_supervision_timeout = supervision_timeout; 6710 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_CHANGE_HCI_CON_PARAMETERS; 6711 hci_run(); 6712 return 0; 6713 } 6714 6715 /** 6716 * @brief Request an update of the connection parameter for a given LE connection 6717 * @param handle 6718 * @param conn_interval_min (unit: 1.25ms) 6719 * @param conn_interval_max (unit: 1.25ms) 6720 * @param conn_latency 6721 * @param supervision_timeout (unit: 10ms) 6722 * @return 0 if ok 6723 */ 6724 int gap_request_connection_parameter_update(hci_con_handle_t con_handle, uint16_t conn_interval_min, 6725 uint16_t conn_interval_max, uint16_t conn_latency, uint16_t supervision_timeout){ 6726 hci_connection_t * connection = hci_connection_for_handle(con_handle); 6727 if (!connection) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 6728 connection->le_conn_interval_min = conn_interval_min; 6729 connection->le_conn_interval_max = conn_interval_max; 6730 connection->le_conn_latency = conn_latency; 6731 connection->le_supervision_timeout = supervision_timeout; 6732 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_SEND_REQUEST; 6733 uint8_t l2cap_trigger_run_event[2] = { L2CAP_EVENT_TRIGGER_RUN, 0}; 6734 hci_emit_event(l2cap_trigger_run_event, sizeof(l2cap_trigger_run_event), 0); 6735 return 0; 6736 } 6737 6738 #ifdef ENABLE_LE_PERIPHERAL 6739 6740 /** 6741 * @brief Set Advertisement Data 6742 * @param advertising_data_length 6743 * @param advertising_data (max 31 octets) 6744 * @note data is not copied, pointer has to stay valid 6745 */ 6746 void gap_advertisements_set_data(uint8_t advertising_data_length, uint8_t * advertising_data){ 6747 hci_stack->le_advertisements_data_len = advertising_data_length; 6748 hci_stack->le_advertisements_data = advertising_data; 6749 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_ADV_DATA; 6750 hci_run(); 6751 } 6752 6753 /** 6754 * @brief Set Scan Response Data 6755 * @param advertising_data_length 6756 * @param advertising_data (max 31 octets) 6757 * @note data is not copied, pointer has to stay valid 6758 */ 6759 void gap_scan_response_set_data(uint8_t scan_response_data_length, uint8_t * scan_response_data){ 6760 hci_stack->le_scan_response_data_len = scan_response_data_length; 6761 hci_stack->le_scan_response_data = scan_response_data; 6762 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA; 6763 hci_run(); 6764 } 6765 6766 /** 6767 * @brief Set Advertisement Parameters 6768 * @param adv_int_min 6769 * @param adv_int_max 6770 * @param adv_type 6771 * @param direct_address_type 6772 * @param direct_address 6773 * @param channel_map 6774 * @param filter_policy 6775 * 6776 * @note internal use. use gap_advertisements_set_params from gap_le.h instead. 6777 */ 6778 void hci_le_advertisements_set_params(uint16_t adv_int_min, uint16_t adv_int_max, uint8_t adv_type, 6779 uint8_t direct_address_typ, bd_addr_t direct_address, 6780 uint8_t channel_map, uint8_t filter_policy) { 6781 6782 hci_stack->le_advertisements_interval_min = adv_int_min; 6783 hci_stack->le_advertisements_interval_max = adv_int_max; 6784 hci_stack->le_advertisements_type = adv_type; 6785 hci_stack->le_advertisements_direct_address_type = direct_address_typ; 6786 hci_stack->le_advertisements_channel_map = channel_map; 6787 hci_stack->le_advertisements_filter_policy = filter_policy; 6788 (void)memcpy(hci_stack->le_advertisements_direct_address, direct_address, 6789 6); 6790 6791 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_PARAMS; 6792 hci_stack->le_advertisements_state |= LE_ADVERTISEMENT_STATE_PARAMS_SET; 6793 hci_run(); 6794 } 6795 6796 /** 6797 * @brief Enable/Disable Advertisements 6798 * @param enabled 6799 */ 6800 void gap_advertisements_enable(int enabled){ 6801 if (enabled == 0){ 6802 hci_stack->le_advertisements_state &= ~LE_ADVERTISEMENT_STATE_ENABLED; 6803 } else { 6804 hci_stack->le_advertisements_state |= LE_ADVERTISEMENT_STATE_ENABLED; 6805 } 6806 hci_update_advertisements_enabled_for_current_roles(); 6807 hci_run(); 6808 } 6809 6810 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 6811 static le_advertising_set_t * hci_advertising_set_for_handle(uint8_t advertising_handle){ 6812 btstack_linked_list_iterator_t it; 6813 btstack_linked_list_iterator_init(&it, &hci_stack->le_advertising_sets); 6814 while (btstack_linked_list_iterator_has_next(&it)){ 6815 le_advertising_set_t * item = (le_advertising_set_t *) btstack_linked_list_iterator_next(&it); 6816 if ( item->advertising_handle == advertising_handle ) { 6817 return item; 6818 } 6819 } 6820 return NULL; 6821 } 6822 6823 uint8_t gap_extended_advertising_setup(le_advertising_set_t * storage, const le_extended_advertising_parameters_t * advertising_parameters, uint8_t * out_advertising_handle){ 6824 // find free advertisement handle 6825 uint8_t advertisement_handle; 6826 for (advertisement_handle = 1; advertisement_handle <= LE_EXTENDED_ADVERTISING_MAX_HANDLE; advertisement_handle++){ 6827 if (hci_advertising_set_for_handle(advertisement_handle) == NULL) break; 6828 } 6829 if (advertisement_handle > LE_EXTENDED_ADVERTISING_MAX_HANDLE) return ERROR_CODE_MEMORY_CAPACITY_EXCEEDED; 6830 // clear 6831 memset(storage, 0, sizeof(le_advertising_set_t)); 6832 // copy params 6833 storage->advertising_handle = advertisement_handle; 6834 memcpy(&storage->extended_params, advertising_parameters, sizeof(le_extended_advertising_parameters_t)); 6835 // add to list 6836 bool add_ok = btstack_linked_list_add(&hci_stack->le_advertising_sets, (btstack_linked_item_t *) storage); 6837 if (!add_ok) return ERROR_CODE_ACL_CONNECTION_ALREADY_EXISTS; 6838 *out_advertising_handle = advertisement_handle; 6839 // set tasks and start 6840 storage->tasks = LE_ADVERTISEMENT_TASKS_SET_PARAMS; 6841 hci_run(); 6842 return ERROR_CODE_SUCCESS; 6843 } 6844 6845 uint8_t gap_extended_advertising_set_params(uint8_t advertising_handle, const le_extended_advertising_parameters_t * advertising_parameters){ 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 memcpy(&advertising_set->extended_params, advertising_parameters, sizeof(le_extended_advertising_parameters_t)); 6849 // set tasks and start 6850 advertising_set->tasks |= LE_ADVERTISEMENT_TASKS_SET_PARAMS; 6851 hci_run(); 6852 return ERROR_CODE_SUCCESS; 6853 } 6854 6855 uint8_t gap_extended_advertising_get_params(uint8_t advertising_handle, le_extended_advertising_parameters_t * advertising_parameters){ 6856 le_advertising_set_t * advertising_set = hci_advertising_set_for_handle(advertising_handle); 6857 if (advertising_set == NULL) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 6858 memcpy(advertising_parameters, &advertising_set->extended_params, sizeof(le_extended_advertising_parameters_t)); 6859 return ERROR_CODE_SUCCESS; 6860 } 6861 6862 uint8_t gap_periodic_advertising_set_params(uint8_t advertising_handle, const le_periodic_advertising_parameters_t * advertising_parameters){ 6863 le_advertising_set_t * advertising_set = hci_advertising_set_for_handle(advertising_handle); 6864 if (advertising_set == NULL) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 6865 // periodic advertising requires neither connectable, scannable, legacy or anonymous 6866 if ((advertising_set->extended_params.advertising_event_properties & 0x1f) != 0) return ERROR_CODE_INVALID_HCI_COMMAND_PARAMETERS; 6867 memcpy(&advertising_set->periodic_params, advertising_parameters, sizeof(le_periodic_advertising_parameters_t)); 6868 // set tasks and start 6869 advertising_set->tasks |= LE_ADVERTISEMENT_TASKS_SET_PERIODIC_PARAMS; 6870 hci_run(); 6871 return ERROR_CODE_SUCCESS; 6872 } 6873 6874 uint8_t gap_periodic_advertising_get_params(uint8_t advertising_handle, le_periodic_advertising_parameters_t * advertising_parameters){ 6875 le_advertising_set_t * advertising_set = hci_advertising_set_for_handle(advertising_handle); 6876 if (advertising_set == NULL) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 6877 memcpy(advertising_parameters, &advertising_set->extended_params, sizeof(le_periodic_advertising_parameters_t)); 6878 return ERROR_CODE_SUCCESS; 6879 } 6880 6881 uint8_t gap_extended_advertising_set_random_address(uint8_t advertising_handle, bd_addr_t random_address){ 6882 le_advertising_set_t * advertising_set = hci_advertising_set_for_handle(advertising_handle); 6883 if (advertising_set == NULL) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 6884 memcpy(advertising_set->random_address, random_address, 6); 6885 // set tasks and start 6886 advertising_set->tasks |= LE_ADVERTISEMENT_TASKS_SET_ADDRESS; 6887 hci_run(); 6888 return ERROR_CODE_SUCCESS; 6889 } 6890 6891 uint8_t gap_extended_advertising_set_adv_data(uint8_t advertising_handle, uint16_t advertising_data_length, const uint8_t * advertising_data){ 6892 le_advertising_set_t * advertising_set = hci_advertising_set_for_handle(advertising_handle); 6893 if (advertising_set == NULL) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 6894 advertising_set->adv_data = advertising_data; 6895 advertising_set->adv_data_len = advertising_data_length; 6896 // set tasks and start 6897 advertising_set->tasks |= LE_ADVERTISEMENT_TASKS_SET_ADV_DATA; 6898 hci_run(); 6899 return ERROR_CODE_SUCCESS; 6900 } 6901 6902 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){ 6903 le_advertising_set_t * advertising_set = hci_advertising_set_for_handle(advertising_handle); 6904 if (advertising_set == NULL) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 6905 advertising_set->scan_data = scan_response_data; 6906 advertising_set->scan_data_len = scan_response_data_length; 6907 // set tasks and start 6908 advertising_set->tasks |= LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA; 6909 hci_run(); 6910 return ERROR_CODE_SUCCESS; 6911 } 6912 6913 uint8_t gap_periodic_advertising_set_data(uint8_t advertising_handle, uint16_t periodic_data_length, const uint8_t * periodic_data){ 6914 le_advertising_set_t * advertising_set = hci_advertising_set_for_handle(advertising_handle); 6915 if (advertising_set == NULL) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 6916 advertising_set->periodic_data = periodic_data; 6917 advertising_set->periodic_data_len = periodic_data_length; 6918 // set tasks and start 6919 advertising_set->tasks |= LE_ADVERTISEMENT_TASKS_SET_PERIODIC_DATA; 6920 hci_run(); 6921 return ERROR_CODE_SUCCESS; 6922 } 6923 6924 uint8_t gap_extended_advertising_start(uint8_t advertising_handle, uint16_t timeout, uint8_t num_extended_advertising_events){ 6925 le_advertising_set_t * advertising_set = hci_advertising_set_for_handle(advertising_handle); 6926 if (advertising_set == NULL) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 6927 advertising_set->enable_timeout = timeout; 6928 advertising_set->enable_max_scan_events = num_extended_advertising_events; 6929 // set tasks and start 6930 advertising_set->state |= LE_ADVERTISEMENT_STATE_ENABLED; 6931 hci_run(); 6932 return ERROR_CODE_SUCCESS; 6933 } 6934 6935 uint8_t gap_extended_advertising_stop(uint8_t advertising_handle){ 6936 le_advertising_set_t * advertising_set = hci_advertising_set_for_handle(advertising_handle); 6937 if (advertising_set == NULL) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 6938 // set tasks and start 6939 advertising_set->state &= ~LE_ADVERTISEMENT_STATE_ENABLED; 6940 hci_run(); 6941 return ERROR_CODE_SUCCESS; 6942 } 6943 6944 uint8_t gap_periodic_advertising_start(uint8_t advertising_handle, bool include_adi){ 6945 le_advertising_set_t * advertising_set = hci_advertising_set_for_handle(advertising_handle); 6946 if (advertising_set == NULL) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 6947 // set tasks and start 6948 advertising_set->periodic_include_adi = include_adi; 6949 advertising_set->state |= LE_ADVERTISEMENT_STATE_PERIODIC_ENABLED; 6950 hci_run(); 6951 return ERROR_CODE_SUCCESS; 6952 } 6953 6954 uint8_t gap_periodic_advertising_stop(uint8_t advertising_handle){ 6955 le_advertising_set_t * advertising_set = hci_advertising_set_for_handle(advertising_handle); 6956 if (advertising_set == NULL) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 6957 // set tasks and start 6958 advertising_set->state &= ~LE_ADVERTISEMENT_STATE_PERIODIC_ENABLED; 6959 hci_run(); 6960 return ERROR_CODE_SUCCESS; 6961 } 6962 6963 uint8_t gap_extended_advertising_remove(uint8_t advertising_handle){ 6964 le_advertising_set_t * advertising_set = hci_advertising_set_for_handle(advertising_handle); 6965 if (advertising_set == NULL) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 6966 // set tasks and start 6967 advertising_set->tasks |= LE_ADVERTISEMENT_TASKS_REMOVE_SET; 6968 hci_run(); 6969 return ERROR_CODE_SUCCESS; 6970 } 6971 #endif 6972 6973 #endif 6974 6975 void hci_le_set_own_address_type(uint8_t own_address_type){ 6976 log_info("hci_le_set_own_address_type: old %u, new %u", hci_stack->le_own_addr_type, own_address_type); 6977 if (own_address_type == hci_stack->le_own_addr_type) return; 6978 hci_stack->le_own_addr_type = own_address_type; 6979 6980 #ifdef ENABLE_LE_PERIPHERAL 6981 // update advertisement parameters, too 6982 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_PARAMS; 6983 hci_run(); 6984 #endif 6985 #ifdef ENABLE_LE_CENTRAL 6986 // note: we don't update scan parameters or modify ongoing connection attempts 6987 #endif 6988 } 6989 6990 void hci_le_random_address_set(const bd_addr_t random_address){ 6991 memcpy(hci_stack->le_random_address, random_address, 6); 6992 hci_stack->le_random_address_set = true; 6993 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_ADDRESS; 6994 hci_run(); 6995 } 6996 6997 #endif 6998 6999 uint8_t gap_disconnect(hci_con_handle_t handle){ 7000 hci_connection_t * conn = hci_connection_for_handle(handle); 7001 if (!conn){ 7002 hci_emit_disconnection_complete(handle, 0); 7003 return 0; 7004 } 7005 // ignore if already disconnected 7006 if (conn->state == RECEIVED_DISCONNECTION_COMPLETE){ 7007 return 0; 7008 } 7009 conn->state = SEND_DISCONNECT; 7010 hci_run(); 7011 return 0; 7012 } 7013 7014 int gap_read_rssi(hci_con_handle_t con_handle){ 7015 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 7016 if (hci_connection == NULL) return 0; 7017 hci_connection->gap_connection_tasks |= GAP_CONNECTION_TASK_READ_RSSI; 7018 hci_run(); 7019 return 1; 7020 } 7021 7022 /** 7023 * @brief Get connection type 7024 * @param con_handle 7025 * @result connection_type 7026 */ 7027 gap_connection_type_t gap_get_connection_type(hci_con_handle_t connection_handle){ 7028 hci_connection_t * conn = hci_connection_for_handle(connection_handle); 7029 if (!conn) return GAP_CONNECTION_INVALID; 7030 switch (conn->address_type){ 7031 case BD_ADDR_TYPE_LE_PUBLIC: 7032 case BD_ADDR_TYPE_LE_RANDOM: 7033 return GAP_CONNECTION_LE; 7034 case BD_ADDR_TYPE_SCO: 7035 return GAP_CONNECTION_SCO; 7036 case BD_ADDR_TYPE_ACL: 7037 return GAP_CONNECTION_ACL; 7038 default: 7039 return GAP_CONNECTION_INVALID; 7040 } 7041 } 7042 7043 hci_role_t gap_get_role(hci_con_handle_t connection_handle){ 7044 hci_connection_t * conn = hci_connection_for_handle(connection_handle); 7045 if (!conn) return HCI_ROLE_INVALID; 7046 return (hci_role_t) conn->role; 7047 } 7048 7049 7050 #ifdef ENABLE_CLASSIC 7051 uint8_t gap_request_role(const bd_addr_t addr, hci_role_t role){ 7052 hci_connection_t * conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 7053 if (!conn) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 7054 conn->request_role = role; 7055 hci_run(); 7056 return ERROR_CODE_SUCCESS; 7057 } 7058 #endif 7059 7060 #ifdef ENABLE_BLE 7061 7062 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){ 7063 hci_connection_t * conn = hci_connection_for_handle(con_handle); 7064 if (!conn) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 7065 7066 conn->le_phy_update_all_phys = all_phys; 7067 conn->le_phy_update_tx_phys = tx_phys; 7068 conn->le_phy_update_rx_phys = rx_phys; 7069 conn->le_phy_update_phy_options = phy_options; 7070 7071 hci_run(); 7072 7073 return 0; 7074 } 7075 7076 static uint8_t hci_whitelist_add(bd_addr_type_t address_type, const bd_addr_t address){ 7077 // check if already in list 7078 btstack_linked_list_iterator_t it; 7079 btstack_linked_list_iterator_init(&it, &hci_stack->le_whitelist); 7080 while (btstack_linked_list_iterator_has_next(&it)) { 7081 whitelist_entry_t *entry = (whitelist_entry_t *) btstack_linked_list_iterator_next(&it); 7082 if (entry->address_type != address_type) { 7083 continue; 7084 } 7085 if (memcmp(entry->address, address, 6) != 0) { 7086 continue; 7087 } 7088 // disallow if already scheduled to add 7089 if ((entry->state & LE_WHITELIST_ADD_TO_CONTROLLER) != 0){ 7090 return ERROR_CODE_COMMAND_DISALLOWED; 7091 } 7092 // still on controller, but scheduled to remove -> re-add 7093 entry->state |= LE_WHITELIST_ADD_TO_CONTROLLER; 7094 return ERROR_CODE_SUCCESS; 7095 } 7096 // alloc and add to list 7097 whitelist_entry_t * entry = btstack_memory_whitelist_entry_get(); 7098 if (!entry) return BTSTACK_MEMORY_ALLOC_FAILED; 7099 entry->address_type = address_type; 7100 (void)memcpy(entry->address, address, 6); 7101 entry->state = LE_WHITELIST_ADD_TO_CONTROLLER; 7102 btstack_linked_list_add(&hci_stack->le_whitelist, (btstack_linked_item_t*) entry); 7103 return ERROR_CODE_SUCCESS; 7104 } 7105 7106 static uint8_t hci_whitelist_remove(bd_addr_type_t address_type, const bd_addr_t address){ 7107 btstack_linked_list_iterator_t it; 7108 btstack_linked_list_iterator_init(&it, &hci_stack->le_whitelist); 7109 while (btstack_linked_list_iterator_has_next(&it)){ 7110 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&it); 7111 if (entry->address_type != address_type) { 7112 continue; 7113 } 7114 if (memcmp(entry->address, address, 6) != 0) { 7115 continue; 7116 } 7117 if (entry->state & LE_WHITELIST_ON_CONTROLLER){ 7118 // remove from controller if already present 7119 entry->state |= LE_WHITELIST_REMOVE_FROM_CONTROLLER; 7120 } else { 7121 // directly remove entry from whitelist 7122 btstack_linked_list_iterator_remove(&it); 7123 btstack_memory_whitelist_entry_free(entry); 7124 } 7125 return ERROR_CODE_SUCCESS; 7126 } 7127 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 7128 } 7129 7130 static void hci_whitelist_clear(void){ 7131 btstack_linked_list_iterator_t it; 7132 btstack_linked_list_iterator_init(&it, &hci_stack->le_whitelist); 7133 while (btstack_linked_list_iterator_has_next(&it)){ 7134 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&it); 7135 if (entry->state & LE_WHITELIST_ON_CONTROLLER){ 7136 // remove from controller if already present 7137 entry->state |= LE_WHITELIST_REMOVE_FROM_CONTROLLER; 7138 continue; 7139 } 7140 // directly remove entry from whitelist 7141 btstack_linked_list_iterator_remove(&it); 7142 btstack_memory_whitelist_entry_free(entry); 7143 } 7144 } 7145 7146 // free all entries unconditionally 7147 static void hci_whitelist_free(void){ 7148 btstack_linked_list_iterator_t lit; 7149 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 7150 while (btstack_linked_list_iterator_has_next(&lit)){ 7151 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&lit); 7152 btstack_linked_list_remove(&hci_stack->le_whitelist, (btstack_linked_item_t *) entry); 7153 btstack_memory_whitelist_entry_free(entry); 7154 } 7155 } 7156 7157 /** 7158 * @brief Clear Whitelist 7159 * @return 0 if ok 7160 */ 7161 uint8_t gap_whitelist_clear(void){ 7162 hci_whitelist_clear(); 7163 hci_run(); 7164 return ERROR_CODE_SUCCESS; 7165 } 7166 7167 /** 7168 * @brief Add Device to Whitelist 7169 * @param address_typ 7170 * @param address 7171 * @return 0 if ok 7172 */ 7173 uint8_t gap_whitelist_add(bd_addr_type_t address_type, const bd_addr_t address){ 7174 uint8_t status = hci_whitelist_add(address_type, address); 7175 if (status){ 7176 return status; 7177 } 7178 hci_run(); 7179 return ERROR_CODE_SUCCESS; 7180 } 7181 7182 /** 7183 * @brief Remove Device from Whitelist 7184 * @param address_typ 7185 * @param address 7186 * @return 0 if ok 7187 */ 7188 uint8_t gap_whitelist_remove(bd_addr_type_t address_type, const bd_addr_t address){ 7189 uint8_t status = hci_whitelist_remove(address_type, address); 7190 if (status){ 7191 return status; 7192 } 7193 hci_run(); 7194 return ERROR_CODE_SUCCESS; 7195 } 7196 7197 #ifdef ENABLE_LE_CENTRAL 7198 /** 7199 * @brief Connect with Whitelist 7200 * @note Explicit whitelist management and this connect with whitelist replace deprecated gap_auto_connection_* functions 7201 * @return - if ok 7202 */ 7203 uint8_t gap_connect_with_whitelist(void){ 7204 if (hci_stack->le_connecting_request != LE_CONNECTING_IDLE){ 7205 return ERROR_CODE_COMMAND_DISALLOWED; 7206 } 7207 hci_stack->le_connecting_request = LE_CONNECTING_WHITELIST; 7208 hci_run(); 7209 return ERROR_CODE_SUCCESS; 7210 } 7211 7212 /** 7213 * @brief Auto Connection Establishment - Start Connecting to device 7214 * @param address_typ 7215 * @param address 7216 * @return 0 if ok 7217 */ 7218 uint8_t gap_auto_connection_start(bd_addr_type_t address_type, const bd_addr_t address){ 7219 if (hci_stack->le_connecting_request == LE_CONNECTING_DIRECT){ 7220 return ERROR_CODE_COMMAND_DISALLOWED; 7221 } 7222 7223 uint8_t status = hci_whitelist_add(address_type, address); 7224 if (status == BTSTACK_MEMORY_ALLOC_FAILED) { 7225 return status; 7226 } 7227 7228 hci_stack->le_connecting_request = LE_CONNECTING_WHITELIST; 7229 7230 hci_run(); 7231 return ERROR_CODE_SUCCESS; 7232 } 7233 7234 /** 7235 * @brief Auto Connection Establishment - Stop Connecting to device 7236 * @param address_typ 7237 * @param address 7238 * @return 0 if ok 7239 */ 7240 uint8_t gap_auto_connection_stop(bd_addr_type_t address_type, const bd_addr_t address){ 7241 if (hci_stack->le_connecting_request == LE_CONNECTING_DIRECT){ 7242 return ERROR_CODE_COMMAND_DISALLOWED; 7243 } 7244 7245 hci_whitelist_remove(address_type, address); 7246 if (btstack_linked_list_empty(&hci_stack->le_whitelist)){ 7247 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 7248 } 7249 hci_run(); 7250 return 0; 7251 } 7252 7253 /** 7254 * @brief Auto Connection Establishment - Stop everything 7255 * @note Convenience function to stop all active auto connection attempts 7256 */ 7257 uint8_t gap_auto_connection_stop_all(void){ 7258 if (hci_stack->le_connecting_request == LE_CONNECTING_DIRECT) { 7259 return ERROR_CODE_COMMAND_DISALLOWED; 7260 } 7261 hci_whitelist_clear(); 7262 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 7263 hci_run(); 7264 return ERROR_CODE_SUCCESS; 7265 } 7266 7267 uint16_t gap_le_connection_interval(hci_con_handle_t con_handle){ 7268 hci_connection_t * conn = hci_connection_for_handle(con_handle); 7269 if (!conn) return 0; 7270 return conn->le_connection_interval; 7271 } 7272 #endif 7273 #endif 7274 7275 #ifdef ENABLE_CLASSIC 7276 /** 7277 * @brief Set Extended Inquiry Response data 7278 * @param eir_data size HCI_EXTENDED_INQUIRY_RESPONSE_DATA_LEN (240) bytes, is not copied make sure memory is accessible during stack startup 7279 * @note has to be done before stack starts up 7280 */ 7281 void gap_set_extended_inquiry_response(const uint8_t * data){ 7282 hci_stack->eir_data = data; 7283 hci_stack->gap_tasks_classic |= GAP_TASK_SET_EIR_DATA; 7284 hci_run(); 7285 } 7286 7287 /** 7288 * @brief Start GAP Classic Inquiry 7289 * @param duration in 1.28s units 7290 * @return 0 if ok 7291 * @events: GAP_EVENT_INQUIRY_RESULT, GAP_EVENT_INQUIRY_COMPLETE 7292 */ 7293 int gap_inquiry_start(uint8_t duration_in_1280ms_units){ 7294 if (hci_stack->state != HCI_STATE_WORKING) return ERROR_CODE_COMMAND_DISALLOWED; 7295 if (hci_stack->inquiry_state != GAP_INQUIRY_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 7296 if ((duration_in_1280ms_units < GAP_INQUIRY_DURATION_MIN) || (duration_in_1280ms_units > GAP_INQUIRY_DURATION_MAX)){ 7297 return ERROR_CODE_INVALID_HCI_COMMAND_PARAMETERS; 7298 } 7299 hci_stack->inquiry_state = duration_in_1280ms_units; 7300 hci_run(); 7301 return 0; 7302 } 7303 7304 /** 7305 * @brief Stop GAP Classic Inquiry 7306 * @return 0 if ok 7307 */ 7308 int gap_inquiry_stop(void){ 7309 if ((hci_stack->inquiry_state >= GAP_INQUIRY_DURATION_MIN) && (hci_stack->inquiry_state <= GAP_INQUIRY_DURATION_MAX)) { 7310 // emit inquiry complete event, before it even started 7311 uint8_t event[] = { GAP_EVENT_INQUIRY_COMPLETE, 1, 0}; 7312 hci_emit_event(event, sizeof(event), 1); 7313 return 0; 7314 } 7315 if (hci_stack->inquiry_state != GAP_INQUIRY_STATE_ACTIVE) return ERROR_CODE_COMMAND_DISALLOWED; 7316 hci_stack->inquiry_state = GAP_INQUIRY_STATE_W2_CANCEL; 7317 hci_run(); 7318 return 0; 7319 } 7320 7321 void gap_inquiry_set_lap(uint32_t lap){ 7322 hci_stack->inquiry_lap = lap; 7323 } 7324 7325 void gap_inquiry_set_scan_activity(uint16_t inquiry_scan_interval, uint16_t inquiry_scan_window){ 7326 hci_stack->inquiry_scan_interval = inquiry_scan_interval; 7327 hci_stack->inquiry_scan_window = inquiry_scan_window; 7328 hci_stack->gap_tasks_classic |= GAP_TASK_WRITE_INQUIRY_SCAN_ACTIVITY; 7329 hci_run(); 7330 } 7331 7332 7333 /** 7334 * @brief Remote Name Request 7335 * @param addr 7336 * @param page_scan_repetition_mode 7337 * @param clock_offset only used when bit 15 is set 7338 * @events: HCI_EVENT_REMOTE_NAME_REQUEST_COMPLETE 7339 */ 7340 int gap_remote_name_request(const bd_addr_t addr, uint8_t page_scan_repetition_mode, uint16_t clock_offset){ 7341 if (hci_stack->remote_name_state != GAP_REMOTE_NAME_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 7342 (void)memcpy(hci_stack->remote_name_addr, addr, 6); 7343 hci_stack->remote_name_page_scan_repetition_mode = page_scan_repetition_mode; 7344 hci_stack->remote_name_clock_offset = clock_offset; 7345 hci_stack->remote_name_state = GAP_REMOTE_NAME_STATE_W2_SEND; 7346 hci_run(); 7347 return 0; 7348 } 7349 7350 static int gap_pairing_set_state_and_run(const bd_addr_t addr, uint8_t state){ 7351 hci_stack->gap_pairing_state = state; 7352 (void)memcpy(hci_stack->gap_pairing_addr, addr, 6); 7353 hci_run(); 7354 return 0; 7355 } 7356 7357 /** 7358 * @brief Legacy Pairing Pin Code Response for binary data / non-strings 7359 * @param addr 7360 * @param pin_data 7361 * @param pin_len 7362 * @return 0 if ok 7363 */ 7364 int gap_pin_code_response_binary(const bd_addr_t addr, const uint8_t * pin_data, uint8_t pin_len){ 7365 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 7366 hci_stack->gap_pairing_input.gap_pairing_pin = pin_data; 7367 hci_stack->gap_pairing_pin_len = pin_len; 7368 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PIN); 7369 } 7370 7371 /** 7372 * @brief Legacy Pairing Pin Code Response 7373 * @param addr 7374 * @param pin 7375 * @return 0 if ok 7376 */ 7377 int gap_pin_code_response(const bd_addr_t addr, const char * pin){ 7378 return gap_pin_code_response_binary(addr, (const uint8_t*) pin, strlen(pin)); 7379 } 7380 7381 /** 7382 * @brief Abort Legacy Pairing 7383 * @param addr 7384 * @param pin 7385 * @return 0 if ok 7386 */ 7387 int gap_pin_code_negative(bd_addr_t addr){ 7388 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 7389 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PIN_NEGATIVE); 7390 } 7391 7392 /** 7393 * @brief SSP Passkey Response 7394 * @param addr 7395 * @param passkey 7396 * @return 0 if ok 7397 */ 7398 int gap_ssp_passkey_response(const bd_addr_t addr, uint32_t passkey){ 7399 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 7400 hci_stack->gap_pairing_input.gap_pairing_passkey = passkey; 7401 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PASSKEY); 7402 } 7403 7404 /** 7405 * @brief Abort SSP Passkey Entry/Pairing 7406 * @param addr 7407 * @param pin 7408 * @return 0 if ok 7409 */ 7410 int gap_ssp_passkey_negative(const bd_addr_t addr){ 7411 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 7412 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PASSKEY_NEGATIVE); 7413 } 7414 7415 /** 7416 * @brief Accept SSP Numeric Comparison 7417 * @param addr 7418 * @param passkey 7419 * @return 0 if ok 7420 */ 7421 int gap_ssp_confirmation_response(const bd_addr_t addr){ 7422 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 7423 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_CONFIRMATION); 7424 } 7425 7426 /** 7427 * @brief Abort SSP Numeric Comparison/Pairing 7428 * @param addr 7429 * @param pin 7430 * @return 0 if ok 7431 */ 7432 int gap_ssp_confirmation_negative(const bd_addr_t addr){ 7433 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 7434 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_CONFIRMATION_NEGATIVE); 7435 } 7436 7437 #if defined(ENABLE_EXPLICIT_IO_CAPABILITIES_REPLY) || defined(ENABLE_EXPLICIT_LINK_KEY_REPLY) 7438 static uint8_t gap_set_auth_flag_and_run(const bd_addr_t addr, hci_authentication_flags_t flag){ 7439 hci_connection_t * conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 7440 if (!conn) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 7441 connectionSetAuthenticationFlags(conn, flag); 7442 hci_run(); 7443 return ERROR_CODE_SUCCESS; 7444 } 7445 #endif 7446 7447 #ifdef ENABLE_EXPLICIT_IO_CAPABILITIES_REPLY 7448 uint8_t gap_ssp_io_capabilities_response(const bd_addr_t addr){ 7449 return gap_set_auth_flag_and_run(addr, AUTH_FLAG_SEND_IO_CAPABILITIES_REPLY); 7450 } 7451 7452 uint8_t gap_ssp_io_capabilities_negative(const bd_addr_t addr){ 7453 return gap_set_auth_flag_and_run(addr, AUTH_FLAG_SEND_IO_CAPABILITIES_NEGATIVE_REPLY); 7454 } 7455 #endif 7456 7457 #ifdef ENABLE_CLASSIC_PAIRING_OOB 7458 /** 7459 * @brief Report Remote OOB Data 7460 * @param bd_addr 7461 * @param c_192 Simple Pairing Hash C derived from P-192 public key 7462 * @param r_192 Simple Pairing Randomizer derived from P-192 public key 7463 * @param c_256 Simple Pairing Hash C derived from P-256 public key 7464 * @param r_256 Simple Pairing Randomizer derived from P-256 public key 7465 */ 7466 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){ 7467 hci_connection_t * connection = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 7468 if (connection == NULL) { 7469 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 7470 } 7471 connection->classic_oob_c_192 = c_192; 7472 connection->classic_oob_r_192 = r_192; 7473 7474 // ignore P-256 if not supported by us 7475 if (hci_stack->secure_connections_active){ 7476 connection->classic_oob_c_256 = c_256; 7477 connection->classic_oob_r_256 = r_256; 7478 } 7479 7480 return ERROR_CODE_SUCCESS; 7481 } 7482 /** 7483 * @brief Generate new OOB data 7484 * @note OOB data will be provided in GAP_EVENT_LOCAL_OOB_DATA and be used in future pairing procedures 7485 */ 7486 void gap_ssp_generate_oob_data(void){ 7487 hci_stack->classic_read_local_oob_data = true; 7488 hci_run(); 7489 } 7490 7491 #endif 7492 7493 #ifdef ENABLE_EXPLICIT_LINK_KEY_REPLY 7494 uint8_t gap_send_link_key_response(const bd_addr_t addr, link_key_t link_key, link_key_type_t type){ 7495 hci_connection_t * connection = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 7496 if (connection == NULL) { 7497 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 7498 } 7499 7500 memcpy(connection->link_key, link_key, sizeof(link_key_t)); 7501 connection->link_key_type = type; 7502 7503 return gap_set_auth_flag_and_run(addr, AUTH_FLAG_HANDLE_LINK_KEY_REQUEST); 7504 } 7505 7506 #endif // ENABLE_EXPLICIT_LINK_KEY_REPLY 7507 /** 7508 * @brief Set inquiry mode: standard, with RSSI, with RSSI + Extended Inquiry Results. Has to be called before power on. 7509 * @param inquiry_mode see bluetooth_defines.h 7510 */ 7511 void hci_set_inquiry_mode(inquiry_mode_t inquiry_mode){ 7512 hci_stack->inquiry_mode = inquiry_mode; 7513 } 7514 7515 /** 7516 * @brief Configure Voice Setting for use with SCO data in HSP/HFP 7517 */ 7518 void hci_set_sco_voice_setting(uint16_t voice_setting){ 7519 hci_stack->sco_voice_setting = voice_setting; 7520 } 7521 7522 /** 7523 * @brief Get SCO Voice Setting 7524 * @return current voice setting 7525 */ 7526 uint16_t hci_get_sco_voice_setting(void){ 7527 return hci_stack->sco_voice_setting; 7528 } 7529 7530 static int hci_have_usb_transport(void){ 7531 if (!hci_stack->hci_transport) return 0; 7532 const char * transport_name = hci_stack->hci_transport->name; 7533 if (!transport_name) return 0; 7534 return (transport_name[0] == 'H') && (transport_name[1] == '2'); 7535 } 7536 7537 /** @brief Get SCO packet length for current SCO Voice setting 7538 * @note Using SCO packets of the exact length is required for USB transfer 7539 * @return Length of SCO packets in bytes (not audio frames) 7540 */ 7541 uint16_t hci_get_sco_packet_length(void){ 7542 uint16_t sco_packet_length = 0; 7543 7544 #ifdef ENABLE_SCO_OVER_HCI 7545 // Transparent = mSBC => 1, CVSD with 16-bit samples requires twice as much bytes 7546 int multiplier = ((hci_stack->sco_voice_setting_active & 0x03) == 0x03) ? 1 : 2; 7547 7548 if (hci_have_usb_transport()){ 7549 // see Core Spec for H2 USB Transfer. 7550 // 3 byte SCO header + 24 bytes per connection 7551 int num_sco_connections = btstack_max(1, hci_number_sco_connections()); 7552 sco_packet_length = 3 + 24 * num_sco_connections * multiplier; 7553 } else { 7554 // 3 byte SCO header + SCO packet size over the air (60 bytes) 7555 sco_packet_length = 3 + 60 * multiplier; 7556 // assert that it still fits inside an SCO buffer 7557 if (sco_packet_length > hci_stack->sco_data_packet_length){ 7558 sco_packet_length = 3 + 60; 7559 } 7560 } 7561 #endif 7562 7563 #ifdef HAVE_SCO_TRANSPORT 7564 // Transparent = mSBC => 1, CVSD with 16-bit samples requires twice as much bytes 7565 int multiplier = ((hci_stack->sco_voice_setting_active & 0x03) == 0x03) ? 1 : 2; 7566 sco_packet_length = 3 + 60 * multiplier; 7567 #endif 7568 return sco_packet_length; 7569 } 7570 7571 /** 7572 * @brief Sets the master/slave policy 7573 * @param policy (0: attempt to become master, 1: let connecting device decide) 7574 */ 7575 void hci_set_master_slave_policy(uint8_t policy){ 7576 hci_stack->master_slave_policy = policy; 7577 } 7578 7579 #endif 7580 7581 HCI_STATE hci_get_state(void){ 7582 return hci_stack->state; 7583 } 7584 7585 #ifdef ENABLE_CLASSIC 7586 void gap_register_classic_connection_filter(int (*accept_callback)(bd_addr_t addr, hci_link_type_t link_type)){ 7587 hci_stack->gap_classic_accept_callback = accept_callback; 7588 } 7589 #endif 7590 7591 /** 7592 * @brief Set callback for Bluetooth Hardware Error 7593 */ 7594 void hci_set_hardware_error_callback(void (*fn)(uint8_t error)){ 7595 hci_stack->hardware_error_callback = fn; 7596 } 7597 7598 void hci_disconnect_all(void){ 7599 btstack_linked_list_iterator_t it; 7600 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 7601 while (btstack_linked_list_iterator_has_next(&it)){ 7602 hci_connection_t * con = (hci_connection_t*) btstack_linked_list_iterator_next(&it); 7603 if (con->state == SENT_DISCONNECT) continue; 7604 con->state = SEND_DISCONNECT; 7605 } 7606 hci_run(); 7607 } 7608 7609 uint16_t hci_get_manufacturer(void){ 7610 return hci_stack->manufacturer; 7611 } 7612 7613 #ifdef ENABLE_BLE 7614 static sm_connection_t * sm_get_connection_for_handle(hci_con_handle_t con_handle){ 7615 hci_connection_t * hci_con = hci_connection_for_handle(con_handle); 7616 if (!hci_con) return NULL; 7617 return &hci_con->sm_connection; 7618 } 7619 7620 // extracted from sm.c to allow enabling of l2cap le data channels without adding sm.c to the build 7621 // without sm.c default values from create_connection_for_bd_addr_and_type() resulg in non-encrypted, not-authenticated 7622 #endif 7623 7624 uint8_t gap_encryption_key_size(hci_con_handle_t con_handle){ 7625 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 7626 if (hci_connection == NULL) return 0; 7627 if (hci_is_le_connection(hci_connection)){ 7628 #ifdef ENABLE_BLE 7629 sm_connection_t * sm_conn = &hci_connection->sm_connection; 7630 if (sm_conn->sm_connection_encrypted) { 7631 return sm_conn->sm_actual_encryption_key_size; 7632 } 7633 #endif 7634 } else { 7635 #ifdef ENABLE_CLASSIC 7636 if ((hci_connection->authentication_flags & AUTH_FLAG_CONNECTION_ENCRYPTED)){ 7637 return hci_connection->encryption_key_size; 7638 } 7639 #endif 7640 } 7641 return 0; 7642 } 7643 7644 bool gap_authenticated(hci_con_handle_t con_handle){ 7645 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 7646 if (hci_connection == NULL) return false; 7647 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 if (hci_connection->sm_connection.sm_connection_encrypted == 0) return 0; // unencrypted connection cannot be authenticated 7653 return hci_connection->sm_connection.sm_connection_authenticated != 0; 7654 #endif 7655 #ifdef ENABLE_CLASSIC 7656 case BD_ADDR_TYPE_SCO: 7657 case BD_ADDR_TYPE_ACL: 7658 return gap_authenticated_for_link_key_type(hci_connection->link_key_type); 7659 #endif 7660 default: 7661 return false; 7662 } 7663 } 7664 7665 bool gap_secure_connection(hci_con_handle_t con_handle){ 7666 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 7667 if (hci_connection == NULL) return 0; 7668 7669 switch (hci_connection->address_type){ 7670 #ifdef ENABLE_BLE 7671 case BD_ADDR_TYPE_LE_PUBLIC: 7672 case BD_ADDR_TYPE_LE_RANDOM: 7673 if (hci_connection->sm_connection.sm_connection_encrypted == 0) return false; // unencrypted connection cannot be authenticated 7674 return hci_connection->sm_connection.sm_connection_sc != 0; 7675 #endif 7676 #ifdef ENABLE_CLASSIC 7677 case BD_ADDR_TYPE_SCO: 7678 case BD_ADDR_TYPE_ACL: 7679 return gap_secure_connection_for_link_key_type(hci_connection->link_key_type); 7680 #endif 7681 default: 7682 return false; 7683 } 7684 } 7685 7686 bool gap_bonded(hci_con_handle_t con_handle){ 7687 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 7688 if (hci_connection == NULL) return 0; 7689 7690 #ifdef ENABLE_CLASSIC 7691 link_key_t link_key; 7692 link_key_type_t link_key_type; 7693 #endif 7694 switch (hci_connection->address_type){ 7695 #ifdef ENABLE_BLE 7696 case BD_ADDR_TYPE_LE_PUBLIC: 7697 case BD_ADDR_TYPE_LE_RANDOM: 7698 return hci_connection->sm_connection.sm_le_db_index >= 0; 7699 #endif 7700 #ifdef ENABLE_CLASSIC 7701 case BD_ADDR_TYPE_SCO: 7702 case BD_ADDR_TYPE_ACL: 7703 return hci_stack->link_key_db && hci_stack->link_key_db->get_link_key(hci_connection->address, link_key, &link_key_type); 7704 #endif 7705 default: 7706 return false; 7707 } 7708 } 7709 7710 #ifdef ENABLE_BLE 7711 authorization_state_t gap_authorization_state(hci_con_handle_t con_handle){ 7712 sm_connection_t * sm_conn = sm_get_connection_for_handle(con_handle); 7713 if (!sm_conn) return AUTHORIZATION_UNKNOWN; // wrong connection 7714 if (!sm_conn->sm_connection_encrypted) return AUTHORIZATION_UNKNOWN; // unencrypted connection cannot be authorized 7715 if (!sm_conn->sm_connection_authenticated) return AUTHORIZATION_UNKNOWN; // unauthenticatd connection cannot be authorized 7716 return sm_conn->sm_connection_authorization_state; 7717 } 7718 #endif 7719 7720 #ifdef ENABLE_CLASSIC 7721 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){ 7722 hci_connection_t * conn = hci_connection_for_handle(con_handle); 7723 if (!conn) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 7724 conn->sniff_min_interval = sniff_min_interval; 7725 conn->sniff_max_interval = sniff_max_interval; 7726 conn->sniff_attempt = sniff_attempt; 7727 conn->sniff_timeout = sniff_timeout; 7728 hci_run(); 7729 return 0; 7730 } 7731 7732 /** 7733 * @brief Exit Sniff mode 7734 * @param con_handle 7735 @ @return 0 if ok 7736 */ 7737 uint8_t gap_sniff_mode_exit(hci_con_handle_t con_handle){ 7738 hci_connection_t * conn = hci_connection_for_handle(con_handle); 7739 if (!conn) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 7740 conn->sniff_min_interval = 0xffff; 7741 hci_run(); 7742 return 0; 7743 } 7744 7745 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){ 7746 hci_connection_t * conn = hci_connection_for_handle(con_handle); 7747 if (!conn) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 7748 conn->sniff_subrating_max_latency = max_latency; 7749 conn->sniff_subrating_min_remote_timeout = min_remote_timeout; 7750 conn->sniff_subrating_min_local_timeout = min_local_timeout; 7751 hci_run(); 7752 return ERROR_CODE_SUCCESS; 7753 } 7754 7755 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){ 7756 hci_connection_t * conn = hci_connection_for_handle(con_handle); 7757 if (!conn) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 7758 conn->qos_service_type = service_type; 7759 conn->qos_token_rate = token_rate; 7760 conn->qos_peak_bandwidth = peak_bandwidth; 7761 conn->qos_latency = latency; 7762 conn->qos_delay_variation = delay_variation; 7763 hci_run(); 7764 return ERROR_CODE_SUCCESS; 7765 } 7766 7767 void gap_set_page_scan_activity(uint16_t page_scan_interval, uint16_t page_scan_window){ 7768 hci_stack->new_page_scan_interval = page_scan_interval; 7769 hci_stack->new_page_scan_window = page_scan_window; 7770 hci_stack->gap_tasks_classic |= GAP_TASK_WRITE_PAGE_SCAN_ACTIVITY; 7771 hci_run(); 7772 } 7773 7774 void gap_set_page_scan_type(page_scan_type_t page_scan_type){ 7775 hci_stack->new_page_scan_type = (uint8_t) page_scan_type; 7776 hci_stack->gap_tasks_classic |= GAP_TASK_WRITE_PAGE_SCAN_TYPE; 7777 hci_run(); 7778 } 7779 7780 void gap_set_page_timeout(uint16_t page_timeout){ 7781 hci_stack->page_timeout = page_timeout; 7782 hci_stack->gap_tasks_classic |= GAP_TASK_WRITE_PAGE_TIMEOUT; 7783 hci_run(); 7784 } 7785 7786 #endif 7787 7788 void hci_halting_defer(void){ 7789 if (hci_stack->state != HCI_STATE_HALTING) return; 7790 switch (hci_stack->substate){ 7791 case HCI_HALTING_READY_FOR_CLOSE: 7792 hci_stack->substate = HCI_HALTING_DEFER_CLOSE; 7793 break; 7794 default: 7795 break; 7796 } 7797 } 7798 7799 #ifdef ENABLE_LE_PRIVACY_ADDRESS_RESOLUTION 7800 void hci_load_le_device_db_entry_into_resolving_list(uint16_t le_device_db_index){ 7801 if (le_device_db_index >= MAX_NUM_RESOLVING_LIST_ENTRIES) return; 7802 if (le_device_db_index >= le_device_db_max_count()) return; 7803 uint8_t offset = le_device_db_index >> 3; 7804 uint8_t mask = 1 << (le_device_db_index & 7); 7805 hci_stack->le_resolving_list_add_entries[offset] |= mask; 7806 if (hci_stack->le_resolving_list_state == LE_RESOLVING_LIST_DONE){ 7807 // note: go back to remove entries, otherwise, a remove + add will skip the add 7808 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_REMOVE_ENTRIES; 7809 } 7810 } 7811 7812 void hci_remove_le_device_db_entry_from_resolving_list(uint16_t le_device_db_index){ 7813 if (le_device_db_index >= MAX_NUM_RESOLVING_LIST_ENTRIES) return; 7814 if (le_device_db_index >= le_device_db_max_count()) return; 7815 uint8_t offset = le_device_db_index >> 3; 7816 uint8_t mask = 1 << (le_device_db_index & 7); 7817 hci_stack->le_resolving_list_remove_entries[offset] |= mask; 7818 if (hci_stack->le_resolving_list_state == LE_RESOLVING_LIST_DONE){ 7819 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_REMOVE_ENTRIES; 7820 } 7821 } 7822 7823 uint8_t gap_load_resolving_list_from_le_device_db(void){ 7824 if (hci_command_supported(SUPPORTED_HCI_COMMAND_LE_SET_ADDRESS_RESOLUTION_ENABLE) == false){ 7825 return ERROR_CODE_UNSUPPORTED_FEATURE_OR_PARAMETER_VALUE; 7826 } 7827 if (hci_stack->le_resolving_list_state != LE_RESOLVING_LIST_SEND_ENABLE_ADDRESS_RESOLUTION){ 7828 // restart le resolving list update 7829 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_READ_SIZE; 7830 } 7831 return ERROR_CODE_SUCCESS; 7832 } 7833 #endif 7834 7835 #ifdef FUZZING_BUILD_MODE_UNSAFE_FOR_PRODUCTION 7836 void hci_setup_test_connections_fuzz(void){ 7837 hci_connection_t * conn; 7838 7839 // default address: 66:55:44:33:00:01 7840 bd_addr_t addr = { 0x66, 0x55, 0x44, 0x33, 0x00, 0x00}; 7841 7842 // setup Controller info 7843 hci_stack->num_cmd_packets = 255; 7844 hci_stack->acl_packets_total_num = 255; 7845 7846 // setup incoming Classic ACL connection with con handle 0x0001, 66:55:44:33:22:01 7847 addr[5] = 0x01; 7848 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 7849 conn->con_handle = addr[5]; 7850 conn->role = HCI_ROLE_SLAVE; 7851 conn->state = RECEIVED_CONNECTION_REQUEST; 7852 conn->sm_connection.sm_role = HCI_ROLE_SLAVE; 7853 7854 // setup incoming Classic SCO connection with con handle 0x0002 7855 addr[5] = 0x02; 7856 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_SCO); 7857 conn->con_handle = addr[5]; 7858 conn->role = HCI_ROLE_SLAVE; 7859 conn->state = RECEIVED_CONNECTION_REQUEST; 7860 conn->sm_connection.sm_role = HCI_ROLE_SLAVE; 7861 7862 // setup ready Classic ACL connection with con handle 0x0003 7863 addr[5] = 0x03; 7864 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 7865 conn->con_handle = addr[5]; 7866 conn->role = HCI_ROLE_SLAVE; 7867 conn->state = OPEN; 7868 conn->sm_connection.sm_role = HCI_ROLE_SLAVE; 7869 7870 // setup ready Classic SCO connection with con handle 0x0004 7871 addr[5] = 0x04; 7872 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_SCO); 7873 conn->con_handle = addr[5]; 7874 conn->role = HCI_ROLE_SLAVE; 7875 conn->state = OPEN; 7876 conn->sm_connection.sm_role = HCI_ROLE_SLAVE; 7877 7878 // setup ready LE ACL connection with con handle 0x005 and public address 7879 addr[5] = 0x05; 7880 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_LE_PUBLIC); 7881 conn->con_handle = addr[5]; 7882 conn->role = HCI_ROLE_SLAVE; 7883 conn->state = OPEN; 7884 conn->sm_connection.sm_role = HCI_ROLE_SLAVE; 7885 conn->sm_connection.sm_connection_encrypted = 1; 7886 } 7887 7888 void hci_free_connections_fuzz(void){ 7889 btstack_linked_list_iterator_t it; 7890 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 7891 while (btstack_linked_list_iterator_has_next(&it)){ 7892 hci_connection_t * con = (hci_connection_t*) btstack_linked_list_iterator_next(&it); 7893 btstack_linked_list_iterator_remove(&it); 7894 btstack_memory_hci_connection_free(con); 7895 } 7896 } 7897 void hci_simulate_working_fuzz(void){ 7898 hci_stack->le_scanning_param_update = false; 7899 hci_init_done(); 7900 hci_stack->num_cmd_packets = 255; 7901 } 7902 #endif 7903