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