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